Modified the UGetCursor() routine to return a valid response if the

[xcircuit.git] / lib / tcl / tkcon.tcl

#!/bin/sh
# \
exec ${XCIRCUIT_WISH:=wish} "$0" ${1+"$@"}

#
## tkcon.tcl
## Enhanced Tk Console, part of the VerTcl system
##
## Originally based off Brent Welch's Tcl Shell Widget
## (from "Practical Programming in Tcl and Tk")
##
## Thanks to the following (among many) for early bug reports & code ideas:
## Steven Wahl <steven@indra.com>, Jan Nijtmans <nijtmans@nici.kun.nl>
## Crimmins <markcrim@umich.edu>, Wart <wart@ugcs.caltech.edu>
##
## Copyright 1995-2001 Jeffrey Hobbs
## Initiated: Thu Aug 17 15:36:47 PDT 1995
##
## jeff.hobbs@acm.org, jeff@hobbs.org
##
## source standard_disclaimer.tcl
## source bourbon_ware.tcl
##

# Proxy support for retrieving the current version of Tkcon.
#
# Mon Jun 25 12:19:56 2001 - Pat Thoyts <Pat.Thoyts@bigfoot.com>
#
# In your tkcon.cfg or .tkconrc file put your proxy details into the
# `proxy' member of the `PRIV' array. e.g.:
#
#    set ::tkcon::PRIV(proxy) wwwproxy:8080
#
# If you want to be prompted for proxy authentication details (eg for
# an NT proxy server) make the second element of this variable non-nil - eg:
#
#    set ::tkcon::PRIV(proxy) {wwwproxy:8080 1}
#
# Or you can set the above variable from within tkcon by calling 
#
#    tkcon master set ::tkcon:PRIV(proxy) wwwproxy:8080
#

if {$tcl_version < 8.0} {
    return -code error "tkcon requires at least Tcl/Tk8"
} else {
    package require Tk $tcl_version
}

catch {package require bogus-package-name}
foreach pkg [info loaded {}] {
    set file [lindex $pkg 0]
    set name [lindex $pkg 1]
    if {![catch {set version [package require $name]}]} {
        if {[string match {} [package ifneeded $name $version]]} {
            package ifneeded $name $version [list load $file $name]
        }
    }
}
catch {unset pkg file name version}

# Tk 8.4 makes previously exposed stuff private.
# FIX: Update tkcon to not rely on the private Tk code.
#
if {![llength [info globals tkPriv]]} {
    ::tk::unsupported::ExposePrivateVariable tkPriv
}
foreach cmd {SetCursor UpDownLine Transpose ScrollPages} {
    if {![llength [info commands tkText$cmd]]} {
        ::tk::unsupported::ExposePrivateCommand tkText$cmd
    }
}

# Initialize the ::tkcon namespace
#
namespace eval ::tkcon {
    # The OPT variable is an array containing most of the optional
    # info to configure.  COLOR has the color data.
    variable OPT
    variable COLOR

    # PRIV is used for internal data that only tkcon should fiddle with.
    variable PRIV
    set PRIV(WWW) [info exists embed_args]
}

## ::tkcon::Init - inits tkcon
#
# Calls:        ::tkcon::InitUI
# Outputs:      errors found in tkcon's resource file
##
proc ::tkcon::Init {} {
    variable OPT
    variable COLOR
    variable PRIV
    global tcl_platform env argc argv tcl_interactive errorInfo

    if {![info exists argv]} {
        set argv {}
        set argc 0
    }

    set tcl_interactive 1

    if {[info exists PRIV(name)]} {
        set title $PRIV(name)
    } else {
        MainInit
        # some main initialization occurs later in this proc,
        # to go after the UI init
        set MainInit 1
        set title Main
    }

    ##
    ## When setting up all the default values, we always check for
    ## prior existence.  This allows users who embed tkcon to modify
    ## the initial state before tkcon initializes itself.
    ##

    # bg == {} will get bg color from the main toplevel (in InitUI)
    foreach {key default} {
        bg              {}
        blink           \#FFFF00
        cursor          \#000000
        disabled        \#4D4D4D
        proc            \#008800
        var             \#FFC0D0
        prompt          \#8F4433
        stdin           \#000000
        stdout          \#0000FF
        stderr          \#FF0000
    } {
        if {![info exists COLOR($key)]} { set COLOR($key) $default }
    }

    foreach {key default} {
        autoload        {}
        blinktime       500
        blinkrange      1
        buffer          512
        calcmode        0
        cols            80
        debugPrompt     {(level \#$level) debug [history nextid] > }
        dead            {}
        expandorder     {Pathname Variable Procname}
        font            {}
        history         48
        hoterrors       1
        library         {}
        lightbrace      1
        lightcmd        1
        maineval        {}
        maxmenu         15
        nontcl          0
        prompt1         {ignore this, it's set below}
        rows            20
        scrollypos      right
        showmenu        1
        showmultiple    1
        showstatusbar   0
        slaveeval       {}
        slaveexit       close
        subhistory      1
        gc-delay        60000
        gets            {congets}
        usehistory      1

        exec            slave
    } {
        if {![info exists OPT($key)]} { set OPT($key) $default }
    }

    foreach {key default} {
        app             {}
        appname         {}
        apptype         slave
        namesp          ::
        cmd             {}
        cmdbuf          {}
        cmdsave         {}
        event           1
        deadapp         0
        deadsock        0
        debugging       0
        displayWin      .
        histid          0
        find            {}
        find,case       0
        find,reg        0
        errorInfo       {}
        showOnStartup   1
        slavealias      { edit more less tkcon }
        slaveprocs      {
            alias clear dir dump echo idebug lremove
            tkcon_puts tkcon_gets observe observe_var unalias which what
        }
        version         2.3
        RCS             {RCS: @(#) $Id: tkcon.tcl,v 1.1.1.1 2011/04/10 21:15:05 tim Exp $}
        HEADURL         {http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/tkcon/tkcon/tkcon.tcl?rev=HEAD}
        docs            "http://tkcon.sourceforge.net/"
        email           {jeff@hobbs.org}
        root            .
    } {
        if {![info exists PRIV($key)]} { set PRIV($key) $default }
    }

    ## NOTES FOR STAYING IN PRIMARY INTERPRETER:
    ##
    ## If you set ::tkcon::OPT(exec) to {}, then instead of a multiple
    ## interp model, you get tkcon operating in the main interp by default.
    ## This can be useful when attaching to programs that like to operate
    ## in the main interpter (for example, based on special wish'es).
    ## You can set this from the command line with -exec ""
    ## A side effect is that all tkcon command line args will be used
    ## by the first console only.
    #set OPT(exec) {}

    if {$PRIV(WWW)} {
        lappend PRIV(slavealias) history
        set OPT(prompt1) {[history nextid] % }
    } else {
        lappend PRIV(slaveprocs) tcl_unknown unknown
        set OPT(prompt1) {([file tail [pwd]]) [history nextid] % }
    }

    ## If we are using the default '.' toplevel, and there appear to be
    ## children of '.', then make sure we use a disassociated toplevel.
    if {$PRIV(root) == "." && [llength [winfo children .]]} {
        set PRIV(root) .tkcon
    }

    ## Do platform specific configuration here, other than defaults
    ### Use tkcon.cfg filename for resource filename on non-unix systems
    ### Determine what directory the resource file should be in
    switch $tcl_platform(platform) {
        macintosh       {
            if {![interp issafe]} {cd [file dirname [info script]]}
            set envHome         PREF_FOLDER
            set rcfile          tkcon.cfg
            set histfile        xcircuit_tkcon.hst
            catch {console hide}
        }
        windows         {
            set envHome         HOME
            set rcfile          tkcon.cfg
            set histfile        xcircuit_tkcon.hst
        }
        unix            {
            set envHome         HOME
            set rcfile          .tkconrc
            set histfile        .xcircuit_tkcon_hst
        }
    }
    if {[info exists env($envHome)]} {
        if {![info exists PRIV(rcfile)]} {
            set PRIV(rcfile)    [file join $env($envHome) $rcfile]
        }
        if {![info exists PRIV(histfile)]} {
            set PRIV(histfile)  [file join $env($envHome) $histfile]
        }
    }

    ## Handle command line arguments before sourcing resource file to
    ## find if resource file is being specified (let other args pass).
    if {[set i [lsearch -exact $argv -rcfile]] != -1} {
        set PRIV(rcfile) [lindex $argv [incr i]]
    }

    if {!$PRIV(WWW) && [file exists $PRIV(rcfile)]} {
        set code [catch {uplevel \#0 [list source $PRIV(rcfile)]} err]
    }

    if {[info exists env(TK_CON_LIBRARY)]} {
        lappend ::auto_path $env(TK_CON_LIBRARY)
    } else {
        lappend ::auto_path $OPT(library)
    }

    if {![info exists ::tcl_pkgPath]} {
        set dir [file join [file dirname [info nameofexec]] lib]
        if {[llength [info commands @scope]]} {
            set dir [file join $dir itcl]
        }
        catch {source [file join $dir pkgIndex.tcl]}
    }
    catch {tclPkgUnknown dummy-name dummy-version}

    ## Handle rest of command line arguments after sourcing resource file
    ## and slave is created, but before initializing UI or setting packages.
    set slaveargs {}
    set slavefiles {}
    set truth {^(1|yes|true|on)$}
    for {set i 0} {$i < $argc} {incr i} {
        set arg [lindex $argv $i]
        if {[string match {-*} $arg]} {
            set val [lindex $argv [incr i]]
            ## Handle arg based options
            switch -glob -- $arg {
                -- - -argv      {
                    set argv [concat -- [lrange $argv $i end]]
                    set argc [llength $argv]
                    break
                }
                -color-*        { set COLOR([string range $arg 7 end]) $val }
                -exec           { set OPT(exec) $val }
                -main - -e - -eval      { append OPT(maineval) \n$val\n }
                -package - -load        { lappend OPT(autoload) $val }
                -slave          { append OPT(slaveeval) \n$val\n }
                -nontcl         { set OPT(nontcl) [regexp -nocase $truth $val]}
                -root           { set PRIV(root) $val }
                -font           { set OPT(font) $val }
                -rcfile {}
                default { lappend slaveargs $arg; incr i -1 }
            }
        } elseif {[file isfile $arg]} {
            lappend slavefiles $arg
        } else {
            lappend slaveargs $arg
        }
    }

    ## Create slave executable
    if {[string compare {} $OPT(exec)]} {
        uplevel \#0 ::tkcon::InitSlave $OPT(exec) $slaveargs
    } else {
        set argc [llength $slaveargs]
        set argv $slaveargs
        uplevel \#0 $slaveargs
    }

    ## Attach to the slave, EvalAttached will then be effective
    Attach $PRIV(appname) $PRIV(apptype)
    InitUI $title

    ## swap puts and gets with the tkcon versions to make sure all
    ## input and output is handled by tkcon
    if {![catch {rename ::puts ::tkcon_tcl_puts}]} {
        interp alias {} ::puts {} ::tkcon_puts
    }
    if {($OPT(gets) != "") && ![catch {rename ::gets ::tkcon_tcl_gets}]} {
        interp alias {} ::gets {} ::tkcon_gets
    }

    EvalSlave history keep $OPT(history)
    if {[info exists MainInit]} {
        # Source history file only for the main console, as all slave
        # consoles will adopt from the main's history, but still
        # keep separate histories
        if {!$PRIV(WWW) && $OPT(usehistory) && [file exists $PRIV(histfile)]} {
            puts -nonewline "loading history file ... "
            # The history file is built to be loaded in and
            # understood by tkcon
            if {[catch {uplevel \#0 [list source $PRIV(histfile)]} herr]} {
                puts stderr "error:\n$herr"
                append PRIV(errorInfo) $errorInfo\n
            }
            set PRIV(event) [EvalSlave history nextid]
            puts "[expr {$PRIV(event)-1}] events added"
        }
    }

    ## Autoload specified packages in slave
    set pkgs [EvalSlave package names]
    foreach pkg $OPT(autoload) {
        puts -nonewline "autoloading package \"$pkg\" ... "
        if {[lsearch -exact $pkgs $pkg]>-1} {
            if {[catch {EvalSlave package require [list $pkg]} pkgerr]} {
                puts stderr "error:\n$pkgerr"
                append PRIV(errorInfo) $errorInfo\n
            } else { puts "OK" }
        } else {
            puts stderr "error: package does not exist"
        }
    }

    ## Evaluate maineval in slave
    if {[string compare {} $OPT(maineval)] && \
            [catch {uplevel \#0 $OPT(maineval)} merr]} {
        puts stderr "error in eval:\n$merr"
        append PRIV(errorInfo) $errorInfo\n
    }

    ## Source extra command line argument files into slave executable
    foreach fn $slavefiles {
        puts -nonewline "slave sourcing \"$fn\" ... "
        if {[catch {EvalSlave source [list $fn]} fnerr]} {
            puts stderr "error:\n$fnerr"
            append PRIV(errorInfo) $errorInfo\n
        } else { puts "OK" }
    }

    ## Evaluate slaveeval in slave
    if {[string compare {} $OPT(slaveeval)] && \
            [catch {interp eval $OPT(exec) $OPT(slaveeval)} serr]} {
        puts stderr "error in slave eval:\n$serr"
        append PRIV(errorInfo) $errorInfo\n
    }
    ## Output any error/output that may have been returned from rcfile
    if {[info exists code] && $code && [string compare {} $err]} {
        puts stderr "error in $PRIV(rcfile):\n$err"
        append PRIV(errorInfo) $errorInfo
    }
    if {[string compare {} $OPT(exec)]} {
        StateCheckpoint [concat $PRIV(name) $OPT(exec)] slave
    }
    StateCheckpoint $PRIV(name) slave

    Prompt "$title console display active (Tcl$::tcl_patchLevel / Tk$::tk_patchLevel)\n"
}

## ::tkcon::InitSlave - inits the slave by placing key procs and aliases in it
## It's arg[cv] are based on passed in options, while argv0 is the same as
## the master.  tcl_interactive is the same as the master as well.
# ARGS: slave   - name of slave to init.  If it does not exist, it is created.
#       args    - args to pass to a slave as argv/argc
##
proc ::tkcon::InitSlave {slave args} {
    variable OPT
    variable COLOR
    variable PRIV
    global argv0 tcl_interactive tcl_library env auto_path

    if {[string match {} $slave]} {
        return -code error "Don't init the master interpreter, goofball"
    }
    if {![interp exists $slave]} { interp create $slave }
    if {[interp eval $slave info command source] == ""} {
        $slave alias source SafeSource $slave
        $slave alias load SafeLoad $slave
        $slave alias open SafeOpen $slave
        $slave alias file file
        interp eval $slave [dump var -nocomplain tcl_library auto_path env]
        interp eval $slave { catch {source [file join $tcl_library init.tcl]} }
        interp eval $slave { catch unknown }
    }
    $slave alias exit exit
    interp eval $slave {
        # Do package require before changing around puts/gets
        catch {package require bogus-package-name}
        catch {rename ::puts ::tkcon_tcl_puts}
    }
    foreach cmd $PRIV(slaveprocs) { $slave eval [dump proc $cmd] }
    foreach cmd $PRIV(slavealias) { $slave alias $cmd $cmd }
    interp alias $slave ::ls $slave ::dir -full
    interp alias $slave ::puts $slave ::tkcon_puts
    if {$OPT(gets) != ""} {
        interp eval $slave { catch {rename ::gets ::tkcon_tcl_gets} }
        interp alias $slave ::gets $slave ::tkcon_gets
    }
    if {[info exists argv0]} {interp eval $slave [list set argv0 $argv0]}
    interp eval $slave set tcl_interactive $tcl_interactive \; \
            set auto_path [list $auto_path] \; \
            set argc [llength $args] \; \
            set argv  [list $args] \; {
        if {![llength [info command bgerror]]} {
            proc bgerror err {
                global errorInfo
                set body [info body bgerror]
                rename ::bgerror {}
                if {[auto_load bgerror]} { return [bgerror $err] }
                proc bgerror err $body
                tkcon bgerror $err $errorInfo
            }
        }
    }

    foreach pkg [lremove [package names] Tcl] {
        foreach v [package versions $pkg] {
            interp eval $slave [list package ifneeded $pkg $v \
                    [package ifneeded $pkg $v]]
        }
    }
}

## ::tkcon::InitInterp - inits an interpreter by placing key
## procs and aliases in it.
# ARGS: name    - interp name
#       type    - interp type (slave|interp)
##
proc ::tkcon::InitInterp {name type} {
    variable OPT
    variable PRIV

    ## Don't allow messing up a local master interpreter
    if {[string match namespace $type] || ([string match slave $type] && \
            [regexp {^([Mm]ain|Slave[0-9]+)$} $name])} return
    set old [Attach]
    set oldname $PRIV(namesp)
    catch {
        Attach $name $type
        EvalAttached { catch {rename ::puts ::tkcon_tcl_puts} }
        foreach cmd $PRIV(slaveprocs) { EvalAttached [dump proc $cmd] }
        switch -exact $type {
            slave {
                foreach cmd $PRIV(slavealias) {
                    Main interp alias $name ::$cmd $PRIV(name) ::$cmd
                }
            }
            interp {
                set thistkcon [tk appname]
                foreach cmd $PRIV(slavealias) {
                    EvalAttached "proc $cmd args { send [list $thistkcon] $cmd \$args }"
                }
            }
        }
        ## Catch in case it's a 7.4 (no 'interp alias') interp
        EvalAttached {
            catch {interp alias {} ::ls {} ::dir -full}
            if {[catch {interp alias {} ::puts {} ::tkcon_puts}]} {
                catch {rename ::tkcon_puts ::puts}
            }
        }
        if {$OPT(gets) != ""} {
            EvalAttached {
                catch {rename ::gets ::tkcon_tcl_gets}
                if {[catch {interp alias {} ::gets {} ::tkcon_gets}]} {
                    catch {rename ::tkcon_gets ::gets}
                }
            }
        }
        return
    } {err}
    eval Attach $old
    AttachNamespace $oldname
    if {[string compare {} $err]} { return -code error $err }
}

## ::tkcon::InitUI - inits UI portion (console) of tkcon
## Creates all elements of the console window and sets up the text tags
# ARGS: root    - widget pathname of the tkcon console root
#       title   - title for the console root and main (.) windows
# Calls:        ::tkcon::InitMenus, ::tkcon::Prompt
##
proc ::tkcon::InitUI {title} {
    variable OPT
    variable PRIV
    variable COLOR

    set root $PRIV(root)
    if {[string match . $root]} { set w {} } else { set w [toplevel $root] }
    if {!$PRIV(WWW)} {
        wm withdraw $root
        wm protocol $root WM_DELETE_WINDOW exit
    }
    set PRIV(base) $w

    ## Text Console
    set PRIV(console) [set con $w.text]
    text $con -wrap char -yscrollcommand [list $w.sy set] \
            -foreground $COLOR(stdin) \
            -insertbackground $COLOR(cursor)
    $con mark set output 1.0
    $con mark set limit 1.0
    if {[string compare {} $COLOR(bg)]} {
        $con configure -background $COLOR(bg)
    }
    set COLOR(bg) [$con cget -background]
    if {[string compare {} $OPT(font)]} {
        ## Set user-requested font, if any
        $con configure -font $OPT(font)
    } else {
        ## otherwise make sure the font is monospace
        set font [$con cget -font]
        if {![font metrics $font -fixed]} {
            font create tkconfixed -family Courier -size 12
            $con configure -font tkconfixed
        }
    }
    set OPT(font) [$con cget -font]
    if {!$PRIV(WWW)} {
        $con configure -setgrid 1 -width $OPT(cols) -height $OPT(rows)
    }
    bindtags $con [list $con TkConsole TkConsolePost $root all]
    ## Menus
    ## catch against use in plugin
    if {[catch {menu $w.mbar} PRIV(menubar)]} {
        set PRIV(menubar) [frame $w.mbar -relief raised -bd 1]
    }
    ## Scrollbar
    set PRIV(scrolly) [scrollbar $w.sy -takefocus 0 -bd 1 \
            -command [list $con yview]]

    InitMenus $PRIV(menubar) $title
    Bindings

    if {$OPT(showmenu)} {
        $root configure -menu $PRIV(menubar)
    }
    pack $w.sy -side $OPT(scrollypos) -fill y
    pack $con -fill both -expand 1

    set PRIV(statusbar) [set sbar [frame $w.sbar]]
    label $sbar.attach -relief sunken -bd 1 -anchor w \
            -textvariable ::tkcon::PRIV(StatusAttach)
    label $sbar.mode -relief sunken -bd 1 -anchor w  \
            -textvariable ::tkcon::PRIV(StatusMode)
    label $sbar.cursor -relief sunken -bd 1 -anchor w -width 6 \
            -textvariable ::tkcon::PRIV(StatusCursor)
    grid $sbar.attach $sbar.mode $sbar.cursor -sticky news -padx 1
    grid columnconfigure $sbar 0 -weight 1
    grid columnconfigure $sbar 1 -weight 1
    grid columnconfigure $sbar 2 -weight 0

    if {$OPT(showstatusbar)} {
        pack $sbar -side bottom -fill x -before $::tkcon::PRIV(scrolly)
    }

    foreach col {prompt stdout stderr stdin proc} {
        $con tag configure $col -foreground $COLOR($col)
    }
    $con tag configure var -background $COLOR(var)
    $con tag raise sel
    $con tag configure blink -background $COLOR(blink)
    $con tag configure find -background $COLOR(blink)

    if {!$PRIV(WWW)} {
        wm title $root "tkcon $PRIV(version) $title"
        bind $con <Configure> {
            scan [wm geometry [winfo toplevel %W]] "%%dx%%d" \
                    ::tkcon::OPT(cols) ::tkcon::OPT(rows)
        }
        if {$PRIV(showOnStartup)} { wm deiconify $root }
    }
    if {$PRIV(showOnStartup)} { focus -force $PRIV(console) }
    if {$OPT(gc-delay)} {
        after $OPT(gc-delay) ::tkcon::GarbageCollect
    }
}

## ::tkcon::GarbageCollect - do various cleanup ops periodically to our setup
##
proc ::tkcon::GarbageCollect {} {
    variable OPT
    variable PRIV

    set w $PRIV(console)
    ## Remove error tags that no longer span anything
    ## Make sure the tag pattern matches the unique tag prefix
    foreach tag [$w tag names] {
        if {[string match _tag* $tag] && ![llength [$w tag ranges $tag]]} {
            $w tag delete $tag
        }
    }
    if {$OPT(gc-delay)} {
        after $OPT(gc-delay) ::tkcon::GarbageCollect
    }
}

## ::tkcon::Eval - evaluates commands input into console window
## This is the first stage of the evaluating commands in the console.
## They need to be broken up into consituent commands (by ::tkcon::CmdSep) in
## case a multiple commands were pasted in, then each is eval'ed (by
## ::tkcon::EvalCmd) in turn.  Any uncompleted command will not be eval'ed.
# ARGS: w       - console text widget
# Calls:        ::tkcon::CmdGet, ::tkcon::CmdSep, ::tkcon::EvalCmd
## 
proc ::tkcon::Eval {w} {
    set incomplete [CmdSep [CmdGet $w] cmds last]
    $w mark set insert end-1c
    $w insert end \n
    if {[llength $cmds]} {
        foreach c $cmds {EvalCmd $w $c}
        $w insert insert $last {}
    } elseif {!$incomplete} {
        EvalCmd $w $last
    }
    $w see insert
}

## ::tkcon::EvalCmd - evaluates a single command, adding it to history
# ARGS: w       - console text widget
#       cmd     - the command to evaluate
# Calls:        ::tkcon::Prompt
# Outputs:      result of command to stdout (or stderr if error occured)
# Returns:      next event number
## 
proc ::tkcon::EvalCmd {w cmd} {
    variable OPT
    variable PRIV

    $w mark set output end
    if {[string compare {} $cmd]} {
        set code 0
        if {$OPT(subhistory)} {
            set ev [EvalSlave history nextid]
            incr ev -1
            if {[string match !! $cmd]} {
                set code [catch {EvalSlave history event $ev} cmd]
                if {!$code} {$w insert output $cmd\n stdin}
            } elseif {[regexp {^!(.+)$} $cmd dummy event]} {
                ## Check last event because history event is broken
                set code [catch {EvalSlave history event $ev} cmd]
                if {!$code && ![string match ${event}* $cmd]} {
                    set code [catch {EvalSlave history event $event} cmd]
                }
                if {!$code} {$w insert output $cmd\n stdin}
            } elseif {[regexp {^\^([^^]*)\^([^^]*)\^?$} $cmd dummy old new]} {
                set code [catch {EvalSlave history event $ev} cmd]
                if {!$code} {
                    regsub -all -- $old $cmd $new cmd
                    $w insert output $cmd\n stdin
                }
            } elseif {$OPT(calcmode) && ![catch {expr $cmd} err]} {
                EvalSlave history add $cmd
                set cmd $err
                set code -1
            }
        }
        if {$code} {
            $w insert output $cmd\n stderr
        } else {
            ## We are about to evaluate the command, so move the limit
            ## mark to ensure that further <Return>s don't cause double
            ## evaluation of this command - for cases like the command
            ## has a vwait or something in it
            $w mark set limit end
            if {$OPT(nontcl) && [string match interp $PRIV(apptype)]} {
                set code [catch {EvalSend $cmd} res]
                if {$code == 1} {
                    set PRIV(errorInfo) "Non-Tcl errorInfo not available"
                }
            } elseif {[string match socket $PRIV(apptype)]} {
                set code [catch {EvalSocket $cmd} res]
                if {$code == 1} {
                    set PRIV(errorInfo) "Socket-based errorInfo not available"
                }
            } else {
                set code [catch {EvalAttached $cmd} res]
                if {$code == 1} {
                    if {[catch {EvalAttached [list set errorInfo]} err]} {
                        set PRIV(errorInfo) "Error getting errorInfo:\n$err"
                    } else {
                        set PRIV(errorInfo) $err
                    }
                }
            }
            EvalSlave history add $cmd
            if {$code} {
                if {$OPT(hoterrors)} {
                    set tag [UniqueTag $w]
                    $w insert output $res [list stderr $tag] \n stderr
                    $w tag bind $tag <Enter> \
                            [list $w tag configure $tag -underline 1]
                    $w tag bind $tag <Leave> \
                            [list $w tag configure $tag -underline 0]
                    $w tag bind $tag <ButtonRelease-1> \
                            "if {!\[info exists tkPriv(mouseMoved)\] || !\$tkPriv(mouseMoved)} \
                            {[list edit -attach [Attach] -type error -- $PRIV(errorInfo)]}"
                } else {
                    $w insert output $res\n stderr
                }
            } elseif {[string compare {} $res]} {
                $w insert output $res\n stdout
            }
        }
    }
    Prompt
    set PRIV(event) [EvalSlave history nextid]
}

## ::tkcon::EvalSlave - evaluates the args in the associated slave
## args should be passed to this procedure like they would be at
## the command line (not like to 'eval').
# ARGS: args    - the command and args to evaluate
##
proc ::tkcon::EvalSlave args {
    interp eval $::tkcon::OPT(exec) $args
}

## ::tkcon::EvalOther - evaluate a command in a foreign interp or slave
## without attaching to it.  No check for existence is made.
# ARGS: app     - interp/slave name
#       type    - (slave|interp)
##
proc ::tkcon::EvalOther { app type args } {
    if {[string compare slave $type]==0} {
        return [Slave $app $args]
    } else {
        return [uplevel 1 send [list $app] $args]
    }
}

## ::tkcon::EvalSend - sends the args to the attached interpreter
## Varies from 'send' by determining whether attachment is dead
## when an error is received
# ARGS: cmd     - the command string to send across
# Returns:      the result of the command
##
proc ::tkcon::EvalSend cmd {
    variable OPT
    variable PRIV

    if {$PRIV(deadapp)} {
        if {[lsearch -exact [winfo interps] $PRIV(app)]<0} {
            return
        } else {
            set PRIV(appname) [string range $PRIV(appname) 5 end]
            set PRIV(deadapp) 0
            Prompt "\n\"$PRIV(app)\" alive\n" [CmdGet $PRIV(console)]
        }
    }
    set code [catch {send -displayof $PRIV(displayWin) $PRIV(app) $cmd} result]
    if {$code && [lsearch -exact [winfo interps] $PRIV(app)]<0} {
        ## Interpreter disappeared
        if {[string compare leave $OPT(dead)] && \
                ([string match ignore $OPT(dead)] || \
                [tk_dialog $PRIV(base).dead "Dead Attachment" \
                "\"$PRIV(app)\" appears to have died.\
                \nReturn to primary slave interpreter?" questhead 0 OK No])} {
            set PRIV(appname) "DEAD:$PRIV(appname)"
            set PRIV(deadapp) 1
        } else {
            set err "Attached Tk interpreter \"$PRIV(app)\" died."
            Attach {}
            set PRIV(deadapp) 0
            EvalSlave set errorInfo $err
        }
        Prompt \n [CmdGet $PRIV(console)]
    }
    return -code $code $result
}

## ::tkcon::EvalSocket - sends the string to an interpreter attached via
## a tcp/ip socket
##
## In the EvalSocket case, ::tkcon::PRIV(app) is the socket id
##
## Must determine whether socket is dead when an error is received
# ARGS: cmd     - the data string to send across
# Returns:      the result of the command
##
proc ::tkcon::EvalSocket cmd {
    variable OPT
    variable PRIV
    global tcl_version

    if {$PRIV(deadapp)} {
        if {![info exists PRIV(app)] || \
                [catch {eof $PRIV(app)} eof] || $eof} {
            return
        } else {
            set PRIV(appname) [string range $PRIV(appname) 5 end]
            set PRIV(deadapp) 0
            Prompt "\n\"$PRIV(app)\" alive\n" [CmdGet $PRIV(console)]
        }
    }
    # Sockets get \'s interpreted, so that users can
    # send things like \n\r or explicit hex values
    set cmd [subst -novariables -nocommands $cmd]
    #puts [list $PRIV(app) $cmd]
    set code [catch {puts $PRIV(app) $cmd ; flush $PRIV(app)} result]
    if {$code && [eof $PRIV(app)]} {
        ## Interpreter died or disappeared
        puts "$code eof [eof $PRIV(app)]"
        EvalSocketClosed
    }
    return -code $code $result
}

## ::tkcon::EvalSocketEvent - fileevent command for an interpreter attached
## via a tcp/ip socket
## Must determine whether socket is dead when an error is received
# ARGS: args    - the args to send across
# Returns:      the result of the command
##
proc ::tkcon::EvalSocketEvent {} {
    variable PRIV

    if {[gets $PRIV(app) line] == -1} {
        if {[eof $PRIV(app)]} {
            EvalSocketClosed
        }
        return
    }
    puts $line
}

## ::tkcon::EvalSocketClosed - takes care of handling a closed eval socket
##
# ARGS: args    - the args to send across
# Returns:      the result of the command
##
proc ::tkcon::EvalSocketClosed {} {
    variable OPT
    variable PRIV

    catch {close $PRIV(app)}
    if {[string compare leave $OPT(dead)] && \
            ([string match ignore $OPT(dead)] || \
            [tk_dialog $PRIV(base).dead "Dead Attachment" \
            "\"$PRIV(app)\" appears to have died.\
            \nReturn to primary slave interpreter?" questhead 0 OK No])} {
        set PRIV(appname) "DEAD:$PRIV(appname)"
        set PRIV(deadapp) 1
    } else {
        set err "Attached Tk interpreter \"$PRIV(app)\" died."
        Attach {}
        set PRIV(deadapp) 0
        EvalSlave set errorInfo $err
    }
    Prompt \n [CmdGet $PRIV(console)]
}

## ::tkcon::EvalNamespace - evaluates the args in a particular namespace
## This is an override for ::tkcon::EvalAttached for when the user wants
## to attach to a particular namespace of the attached interp
# ARGS: attached        
#       namespace       the namespace to evaluate in
#       args            the args to evaluate
# RETURNS:      the result of the command
##
proc ::tkcon::EvalNamespace { attached namespace args } {
    if {[llength $args]} {
        uplevel \#0 $attached \
                [list [concat [list namespace eval $namespace] $args]]
    }
}


## ::tkcon::Namespaces - return all the namespaces descendent from $ns
##
#
##
proc ::tkcon::Namespaces {{ns ::} {l {}}} {
    if {[string compare {} $ns]} { lappend l $ns }
    foreach i [EvalAttached [list namespace children $ns]] {
        set l [Namespaces $i $l]
    }
    return $l
}

## ::tkcon::CmdGet - gets the current command from the console widget
# ARGS: w       - console text widget
# Returns:      text which compromises current command line
## 
proc ::tkcon::CmdGet w {
    if {![llength [$w tag nextrange prompt limit end]]} {
        $w tag add stdin limit end-1c
        return [$w get limit end-1c]
    }
}

## ::tkcon::CmdSep - separates multiple commands into a list and remainder
# ARGS: cmd     - (possible) multiple command to separate
#       list    - varname for the list of commands that were separated.
#       last    - varname of any remainder (like an incomplete final command).
#               If there is only one command, it's placed in this var.
# Returns:      constituent command info in varnames specified by list & rmd.
## 
proc ::tkcon::CmdSep {cmd list last} {
    upvar 1 $list cmds $last inc
    set inc {}
    set cmds {}
    foreach c [split [string trimleft $cmd] \n] {
        if {[string compare $inc {}]} {
            append inc \n$c
        } else {
            append inc [string trimleft $c]
        }
        if {[info complete $inc] && ![regexp {[^\\]\\$} $inc]} {
            if {[regexp "^\[^#\]" $inc]} {lappend cmds $inc}
            set inc {}
        }
    }
    set i [string compare $inc {}]
    if {!$i && [string compare $cmds {}] && ![string match *\n $cmd]} {
        set inc [lindex $cmds end]
        set cmds [lreplace $cmds end end]
    }
    return $i
}

## ::tkcon::CmdSplit - splits multiple commands into a list
# ARGS: cmd     - (possible) multiple command to separate
# Returns:      constituent commands in a list
## 
proc ::tkcon::CmdSplit {cmd} {
    set inc {}
    set cmds {}
    foreach cmd [split [string trimleft $cmd] \n] {
        if {[string compare {} $inc]} {
            append inc \n$cmd
        } else {
            append inc [string trimleft $cmd]
        }
        if {[info complete $inc] && ![regexp {[^\\]\\$} $inc]} {
            #set inc [string trimright $inc]
            if {[regexp "^\[^#\]" $inc]} {lappend cmds $inc}
            set inc {}
        }
    }
    if {[regexp "^\[^#\]" $inc]} {lappend cmds $inc}
    return $cmds
}

## ::tkcon::UniqueTag - creates a uniquely named tag, reusing names
## Called by ::tkcon::EvalCmd
# ARGS: w       - text widget
# Outputs:      tag name guaranteed unique in the widget
## 
proc ::tkcon::UniqueTag {w} {
    set tags [$w tag names]
    set idx 0
    while {[lsearch -exact $tags _tag[incr idx]] != -1} {}
    return _tag$idx
}

## ::tkcon::ConstrainBuffer - This limits the amount of data in the text widget
## Called by ::tkcon::Prompt and in tkcon proc buffer/console switch cases
# ARGS: w       - console text widget
#       size    - # of lines to constrain to
# Outputs:      may delete data in console widget
## 
proc ::tkcon::ConstrainBuffer {w size} {
    if {[$w index end] > $size} {
        $w delete 1.0 [expr {int([$w index end])-$size}].0
    }
}

## ::tkcon::Prompt - displays the prompt in the console widget
# ARGS: w       - console text widget
# Outputs:      prompt (specified in ::tkcon::OPT(prompt1)) to console
## 
proc ::tkcon::Prompt {{pre {}} {post {}} {prompt {}}} {
    variable OPT
    variable PRIV

    set w $PRIV(console)
    if {[string compare {} $pre]} { $w insert end $pre stdout }
    set i [$w index end-1c]
    if {!$OPT(showstatusbar)} {
        if {[string compare {} $PRIV(appname)]} {
            $w insert end ">$PRIV(appname)< " prompt
        }
        if {[string compare :: $PRIV(namesp)]} {
            $w insert end "<$PRIV(namesp)> " prompt
        }
    }
    if {[string compare {} $prompt]} {
        $w insert end $prompt prompt
    } else {
        $w insert end [EvalSlave subst $OPT(prompt1)] prompt
    }
    $w mark set output $i
    $w mark set insert end
    $w mark set limit insert
    $w mark gravity limit left
    if {[string compare {} $post]} { $w insert end $post stdin }
    ConstrainBuffer $w $OPT(buffer)
    set ::tkcon::PRIV(StatusCursor) [$w index insert]
    $w see end
}

## ::tkcon::About - gives about info for tkcon
## 
proc ::tkcon::About {} {
    variable OPT
    variable PRIV
    variable COLOR

    set w $PRIV(base).about
    if {[winfo exists $w]} {
        wm deiconify $w
    } else {
        global tk_patchLevel tcl_patchLevel tcl_version
        toplevel $w
        wm title $w "About tkcon v$PRIV(version)"
        button $w.b -text Dismiss -command [list wm withdraw $w]
        text $w.text -height 9 -bd 1 -width 60 \
                -foreground $COLOR(stdin) \
                -background $COLOR(bg) \
                -font $OPT(font)
        pack $w.b -fill x -side bottom
        pack $w.text -fill both -side left -expand 1
        $w.text tag config center -justify center
        $w.text tag config title -justify center -font {Courier -18 bold}
        # strip down the RCS info displayed in the about box
        regexp {,v ([0-9\./: ]*)} $PRIV(RCS) -> RCS
        $w.text insert 1.0 "About tkcon v$PRIV(version)" title \
                "\n\nCopyright 1995-2001 Jeffrey Hobbs, $PRIV(email)\
                \nRelease Info: v$PRIV(version), CVS v$RCS\
                \nDocumentation available at:\n$PRIV(docs)\
                \nUsing: Tcl v$tcl_patchLevel / Tk v$tk_patchLevel" center
        $w.text config -state disabled
    }
}

## ::tkcon::InitMenus - inits the menubar and popup for the console
# ARGS: w       - console text widget
## 
proc ::tkcon::InitMenus {w title} {
    variable OPT
    variable PRIV
    variable COLOR
    global tcl_platform

    if {[catch {menu $w.pop -tearoff 0}]} {
        label $w.label -text "Menus not available in plugin mode"
        pack $w.label
        return
    }
    menu $w.context -tearoff 0 -disabledforeground $COLOR(disabled)
    set PRIV(context) $w.context
    set PRIV(popup) $w.pop

    proc MenuButton {w m l} {
        $w add cascade -label $m -underline 0 -menu $w.$l
        return $w.$l
    }

    foreach m [list File Console Edit Interp Prefs History Help] {
        set l [string tolower $m]
        MenuButton $w $m $l
        $w.pop add cascade -label $m -underline 0 -menu $w.pop.$l
    }

    ## File Menu
    ##
    foreach m [list [menu $w.file -disabledforeground $COLOR(disabled)] \
            [menu $w.pop.file -disabledforeground $COLOR(disabled)]] {
        $m add command -label "Load File" -underline 0 -command ::tkcon::Load
        $m add cascade -label "Save ..."  -underline 0 -menu $m.save
        $m add separator
        $m add command -label "Quit" -underline 0 -accel Ctrl-q -command exit

        ## Save Menu
        ##
        set s $m.save
        menu $s -disabledforeground $COLOR(disabled) -tearoff 0
        $s add command -label "All"     -underline 0 \
                -command {::tkcon::Save {} all}
        $s add command -label "History" -underline 0 \
                -command {::tkcon::Save {} history}
        $s add command -label "Stdin"   -underline 3 \
                -command {::tkcon::Save {} stdin}
        $s add command -label "Stdout"  -underline 3 \
                -command {::tkcon::Save {} stdout}
        $s add command -label "Stderr"  -underline 3 \
                -command {::tkcon::Save {} stderr}
    }

    ## Console Menu
    ##
    foreach m [list [menu $w.console -disabledfore $COLOR(disabled)] \
            [menu $w.pop.console -disabledfore $COLOR(disabled)]] {
        $m add command -label "$title Console"  -state disabled
        $m add command -label "New Console"     -underline 0 -accel Ctrl-N \
                -command ::tkcon::New
        $m add command -label "Close Console"   -underline 0 -accel Ctrl-w \
                -command ::tkcon::Destroy
        $m add command -label "Clear Console"   -underline 1 -accel Ctrl-l \
                -command { clear; ::tkcon::Prompt }
        if {[string match unix $tcl_platform(platform)]} {
            $m add separator
            $m add command -label "Make Xauth Secure" -und 5 \
                    -command ::tkcon::XauthSecure
        }
        $m add separator
        $m add cascade -label "Attach To ..."   -underline 0 -menu $m.attach

        ## Attach Console Menu
        ##
        set sub [menu $m.attach -disabledforeground $COLOR(disabled)]
        $sub add cascade -label "Interpreter"   -underline 0 -menu $sub.apps
        $sub add cascade -label "Namespace" -underline 1 -menu $sub.name
        $sub add cascade -label "Socket" -underline 1 -menu $sub.sock \
                -state [expr {([info tclversion] < 8.3)?"disabled":"normal"}]

        ## Attach Console Menu
        ##
        menu $sub.apps -disabledforeground $COLOR(disabled) \
                -postcommand [list ::tkcon::AttachMenu $sub.apps]

        ## Attach Namespace Menu
        ##
        menu $sub.name -disabledforeground $COLOR(disabled) -tearoff 0 \
                -postcommand [list ::tkcon::NamespaceMenu $sub.name]

        if {$::tcl_version >= 8.3} {
            # This uses [file channels] to create the menu, so we only
            # want it for newer versions of Tcl.

            ## Attach Socket Menu
            ##
            menu $sub.sock -disabledforeground $COLOR(disabled) -tearoff 0 \
                    -postcommand [list ::tkcon::SocketMenu $sub.sock]
        }

        ## Attach Display Menu
        ##
        if {![string compare "unix" $tcl_platform(platform)]} {
            $sub add cascade -label "Display" -und 1 -menu $sub.disp
            menu $sub.disp -disabledforeground $COLOR(disabled) \
                    -tearoff 0 \
                    -postcommand [list ::tkcon::DisplayMenu $sub.disp]
        }
    }

    ## Edit Menu
    ##
    set text $PRIV(console)
    foreach m [list [menu $w.edit] [menu $w.pop.edit]] {
        $m add command -label "Cut"   -underline 2 -accel Ctrl-x \
                -command [list ::tkcon::Cut $text]
        $m add command -label "Copy"  -underline 0 -accel Ctrl-c \
                -command [list ::tkcon::Copy $text]
        $m add command -label "Paste" -underline 0 -accel Ctrl-v \
                 -command [list ::tkcon::Paste $text]
        $m add separator
        $m add command -label "Find"  -underline 0 -accel Ctrl-F \
                -command [list ::tkcon::FindBox $text]
    }

    ## Interp Menu
    ##
    foreach m [list $w.interp $w.pop.interp] {
        menu $m -disabledforeground $COLOR(disabled) \
                -postcommand [list ::tkcon::InterpMenu $m]
    }

    ## Prefs Menu
    ##
    foreach m [list [menu $w.prefs] [menu $w.pop.prefs]] {
        $m add check -label "Brace Highlighting" \
                -underline 0 -variable ::tkcon::OPT(lightbrace)
        $m add check -label "Command Highlighting" \
                -underline 0 -variable ::tkcon::OPT(lightcmd)
        $m add check -label "History Substitution" \
                -underline 0 -variable ::tkcon::OPT(subhistory)
        $m add check -label "Hot Errors" \
                -underline 0 -variable ::tkcon::OPT(hoterrors)
        $m add check -label "Non-Tcl Attachments" \
                -underline 0 -variable ::tkcon::OPT(nontcl)
        $m add check -label "Calculator Mode" \
                -underline 1 -variable ::tkcon::OPT(calcmode)
        $m add check -label "Show Multiple Matches" \
                -underline 0 -variable ::tkcon::OPT(showmultiple)
        $m add check -label "Show Menubar" \
                -underline 5 -variable ::tkcon::OPT(showmenu) \
                -command {$::tkcon::PRIV(root) configure -menu [expr \
                {$::tkcon::OPT(showmenu) ? $::tkcon::PRIV(menubar) : {}}]}
        $m add check -label "Show Statusbar" \
                -underline 5 -variable ::tkcon::OPT(showstatusbar) \
                -command {
            if {$::tkcon::OPT(showstatusbar)} {
                pack $::tkcon::PRIV(statusbar) -side bottom -fill x \
                        -before $::tkcon::PRIV(scrolly)
            } else { pack forget $::tkcon::PRIV(statusbar) }
        }
        $m add cascade -label "Scrollbar" -underline 2 -menu $m.scroll

        ## Scrollbar Menu
        ##
        set m [menu $m.scroll -tearoff 0]
        $m add radio -label "Left" -value left \
                -variable ::tkcon::OPT(scrollypos) \
                -command { pack config $::tkcon::PRIV(scrolly) -side left }
        $m add radio -label "Right" -value right \
                -variable ::tkcon::OPT(scrollypos) \
                -command { pack config $::tkcon::PRIV(scrolly) -side right }
    }

    ## History Menu
    ##
    foreach m [list $w.history $w.pop.history] {
        menu $m -disabledforeground $COLOR(disabled) \
                -postcommand [list ::tkcon::HistoryMenu $m]
    }

    ## Help Menu
    ##
    foreach m [list [menu $w.help] [menu $w.pop.help]] {
        $m add command -label "About " -underline 0 -accel Ctrl-A \
                -command ::tkcon::About
        $m add command -label "Retrieve Latest Version" -underline 0 \
                -command ::tkcon::Retrieve
    }
}

## ::tkcon::HistoryMenu - dynamically build the menu for attached interpreters
##
# ARGS: m       - menu widget
##
proc ::tkcon::HistoryMenu m {
    variable PRIV

    if {![winfo exists $m]} return
    set id [EvalSlave history nextid]
    if {$PRIV(histid)==$id} return
    set PRIV(histid) $id
    $m delete 0 end
    while {($id>1) && ($id>$PRIV(histid)-10) && \
            ![catch {EvalSlave history event [incr id -1]} tmp]} {
        set lbl $tmp
        if {[string len $lbl]>32} { set lbl [string range $tmp 0 28]... }
        $m add command -label "$id: $lbl" -command "
        $::tkcon::PRIV(console) delete limit end
        $::tkcon::PRIV(console) insert limit [list $tmp]
        $::tkcon::PRIV(console) see end
        ::tkcon::Eval $::tkcon::PRIV(console)"
    }
}

## ::tkcon::InterpMenu - dynamically build the menu for attached interpreters
##
# ARGS: w       - menu widget
##
proc ::tkcon::InterpMenu w {
    variable OPT
    variable PRIV
    variable COLOR

    if {![winfo exists $w]} return
    $w delete 0 end
    foreach {app type} [Attach] break
    $w add command -label "[string toupper $type]: $app" -state disabled
    if {($OPT(nontcl) && [string match interp $type]) || $PRIV(deadapp)} {
        $w add separator
        $w add command -state disabled -label "Communication disabled to"
        $w add command -state disabled -label "dead or non-Tcl interps"
        return
    }

    ## Show Last Error
    ##
    $w add separator
    $w add command -label "Show Last Error" \
            -command [list tkcon error $app $type]

    ## Packages Cascaded Menu
    ##
    $w add separator
    $w add cascade -label Packages -underline 0 -menu $w.pkg
    set m $w.pkg
    if {![winfo exists $m]} {
        menu $m -tearoff no -disabledforeground $COLOR(disabled) \
                -postcommand [list ::tkcon::PkgMenu $m $app $type]
    }

    ## State Checkpoint/Revert
    ##
    $w add separator
    $w add command -label "Checkpoint State" \
            -command [list ::tkcon::StateCheckpoint $app $type]
    $w add command -label "Revert State" \
            -command [list ::tkcon::StateRevert $app $type]
    $w add command -label "View State Change" \
            -command [list ::tkcon::StateCompare $app $type]

    ## Init Interp
    ##
    $w add separator
    $w add command -label "Send tkcon Commands" \
            -command [list ::tkcon::InitInterp $app $type]
}

## ::tkcon::PkgMenu - fill in  in the applications sub-menu
## with a list of all the applications that currently exist.
##
proc ::tkcon::PkgMenu {m app type} {
    # just in case stuff has been added to the auto_path
    # we have to make sure that the errorInfo doesn't get screwed up
    EvalAttached {
        set __tkcon_error $errorInfo
        catch {package require bogus-package-name}
        set errorInfo ${__tkcon_error}
        unset __tkcon_error
    }
    $m delete 0 end
    foreach pkg [EvalAttached [list info loaded {}]] {
        set loaded([lindex $pkg 1]) [package provide $pkg]
    }
    foreach pkg [lremove [EvalAttached {package names}] Tcl] {
        set version [EvalAttached [list package provide $pkg]]
        if {[string compare {} $version]} {
            set loaded($pkg) $version
        } elseif {![info exists loaded($pkg)]} {
            set loadable($pkg) [list package require $pkg]
        }
    }
    foreach pkg [EvalAttached {info loaded}] {
        set pkg [lindex $pkg 1]
        if {![info exists loaded($pkg)] && ![info exists loadable($pkg)]} {
            set loadable($pkg) [list load {} $pkg]
        }
    }
    set npkg 0
    foreach pkg [lsort -dictionary [array names loadable]] {
        foreach v [EvalAttached [list package version $pkg]] {
            set brkcol [expr {([incr npkg]%16)==0}]
            $m add command -label "Load $pkg ($v)" -command \
                    "::tkcon::EvalOther [list $app] $type $loadable($pkg) $v" \
                    -columnbreak $brkcol
        }
    }
    if {[info exists loaded] && [info exists loadable]} {
        $m add separator
    }
    foreach pkg [lsort -dictionary [array names loaded]] {
        $m add command -label "${pkg}$loaded($pkg) Loaded" -state disabled
    }
}

## ::tkcon::AttachMenu - fill in  in the applications sub-menu
## with a list of all the applications that currently exist.
##
proc ::tkcon::AttachMenu m {
    variable OPT
    variable PRIV

    array set interps [set tmp [Interps]]
    foreach {i j} $tmp { set tknames($j) {} }

    $m delete 0 end
    set cmd {::tkcon::Prompt \n [::tkcon::CmdGet $::tkcon::PRIV(console)]}
    $m add radio -label {None (use local slave) } -accel Ctrl-1 \
            -variable ::tkcon::PRIV(app) \
            -value [concat $::tkcon::PRIV(name) $::tkcon::OPT(exec)] \
            -command "::tkcon::Attach {}; $cmd"
    $m add separator
    $m add command -label "Foreign Tk Interpreters" -state disabled
    foreach i [lsort [lremove [winfo interps] [array names tknames]]] {
        $m add radio -label $i -variable ::tkcon::PRIV(app) -value $i \
                -command "::tkcon::Attach [list $i] interp; $cmd"
    }
    $m add separator

    $m add command -label "tkcon Interpreters" -state disabled
    foreach i [lsort [array names interps]] {
        if {[string match {} $interps($i)]} { set interps($i) "no Tk" }
        if {[regexp {^Slave[0-9]+} $i]} {
            set opts [list -label "$i ($interps($i))" \
                    -variable ::tkcon::PRIV(app) -value $i \
                    -command "::tkcon::Attach [list $i] slave; $cmd"]
            if {[string match $PRIV(name) $i]} {
                append opts " -accel Ctrl-2"
            }
            eval $m add radio $opts
        } else {
            set name [concat Main $i]
            if {[string match Main $name]} {
                $m add radio -label "$name ($interps($i))" -accel Ctrl-3 \
                        -variable ::tkcon::PRIV(app) -value Main \
                        -command "::tkcon::Attach [list $name] slave; $cmd"
            } else {
                $m add radio -label "$name ($interps($i))" \
                        -variable ::tkcon::PRIV(app) -value $i \
                        -command "::tkcon::Attach [list $name] slave; $cmd"
            }
        }
    }
}

## Displays Cascaded Menu
##
proc ::tkcon::DisplayMenu m {
    $m delete 0 end
    set cmd {::tkcon::Prompt \n [::tkcon::CmdGet $::tkcon::PRIV(console)]}

    $m add command -label "New Display" -command ::tkcon::NewDisplay
    foreach disp [Display] {
        $m add separator
        $m add command -label $disp -state disabled
        set res [Display $disp]
        set win [lindex $res 0]
        foreach i [lsort [lindex $res 1]] {
            $m add radio -label $i -variable ::tkcon::PRIV(app) -value $i \
                    -command "::tkcon::Attach [list $i] [list dpy:$win]; $cmd"
        }
    }
}

## Sockets Cascaded Menu
##
proc ::tkcon::SocketMenu m {
    $m delete 0 end
    set cmd {::tkcon::Prompt \n [::tkcon::CmdGet $::tkcon::PRIV(console)]}

    $m add command -label "Create Connection" \
            -command "::tkcon::NewSocket; $cmd"
    foreach sock [file channels sock*] {
        $m add radio -label $sock -variable ::tkcon::PRIV(app) -value $sock \
                -command "::tkcon::Attach $sock socket; $cmd"
    }
}

## Namepaces Cascaded Menu
##
proc ::tkcon::NamespaceMenu m {
    variable PRIV
    variable OPT

    $m delete 0 end
    if {($PRIV(deadapp) || [string match socket $PRIV(apptype)] || \
            ($OPT(nontcl) && [string match interp $PRIV(apptype)]))} {
        $m add command -label "No Namespaces" -state disabled
        return
    }

    ## Same command as for ::tkcon::AttachMenu items
    set cmd {::tkcon::Prompt \n [::tkcon::CmdGet $::tkcon::PRIV(console)]}

    set names [lsort [Namespaces ::]]
    if {[llength $names] > $OPT(maxmenu)} {
        $m add command -label "Attached to $PRIV(namesp)" -state disabled
        $m add command -label "List Namespaces" \
                -command [list ::tkcon::NamespacesList $names]
    } else {
        foreach i $names {
            if {[string match :: $i]} {
                $m add radio -label "Main" -value $i \
                        -variable ::tkcon::PRIV(namesp) \
                        -command "::tkcon::AttachNamespace [list $i]; $cmd"
            } else {
                $m add radio -label $i -value $i \
                        -variable ::tkcon::PRIV(namesp) \
                        -command "::tkcon::AttachNamespace [list $i]; $cmd"
            }
        }
    }
}

## Namepaces List 
##
proc ::tkcon::NamespacesList {names} {
    variable PRIV

    set f $PRIV(base).namespaces
    catch {destroy $f}
    toplevel $f
    listbox $f.names -width 30 -height 15 -selectmode single \
            -yscrollcommand [list $f.scrollv set] \
            -xscrollcommand [list $f.scrollh set]
    scrollbar $f.scrollv -command [list $f.names yview]
    scrollbar $f.scrollh -command [list $f.names xview] -orient horizontal
    frame $f.buttons
    button $f.cancel -text "Cancel" -command [list destroy $f]

    grid $f.names $f.scrollv -sticky nesw
    grid $f.scrollh -sticky ew
    grid $f.buttons -sticky nesw
    grid $f.cancel -in $f.buttons -pady 6

    grid columnconfigure $f 0 -weight 1
    grid rowconfigure $f  0 -weight 1
    #fill the listbox
    foreach i $names {
        if {[string match :: $i]} {
            $f.names insert 0 Main
        } else {
            $f.names insert end $i
        }
    }
    #Bindings
    bind $f.names <Double-1> {
        ## Catch in case the namespace disappeared on us
        catch { ::tkcon::AttachNamespace [%W get [%W nearest %y]] }
        ::tkcon::Prompt "\n" [::tkcon::CmdGet $::tkcon::PRIV(console)]
        destroy [winfo toplevel %W]
    }
}

# ::tkcon::XauthSecure --
#
#   This removes all the names in the xhost list, and secures
#   the display for Tk send commands.  Of course, this prevents
#   what might have been otherwise allowable X connections
#
# Arguments:
#   none
# Results:
#   Returns nothing
#
proc ::tkcon::XauthSecure {} {
    global tcl_platform

    if {[string compare unix $tcl_platform(platform)]} {
        # This makes no sense outside of Unix
        return
    }
    set hosts [exec xhost]
    # the first line is info only
    foreach host [lrange [split $hosts \n] 1 end] {
        exec xhost -$host
    }
    exec xhost -
    tk_messageBox -title "Xhost secured" -message "Xhost secured" -icon info
}

## ::tkcon::FindBox - creates minimal dialog interface to ::tkcon::Find
# ARGS: w       - text widget
#       str     - optional seed string for ::tkcon::PRIV(find)
##
proc ::tkcon::FindBox {w {str {}}} {
    variable PRIV

    set base $PRIV(base).find
    if {![winfo exists $base]} {
        toplevel $base
        wm withdraw $base
        wm title $base "tkcon Find"

        pack [frame $base.f] -fill x -expand 1
        label $base.f.l -text "Find:"
        entry $base.f.e -textvariable ::tkcon::PRIV(find)
        pack [frame $base.opt] -fill x
        checkbutton $base.opt.c -text "Case Sensitive" \
                -variable ::tkcon::PRIV(find,case)
        checkbutton $base.opt.r -text "Use Regexp" -variable ::tkcon::PRIV(find,reg)
        pack $base.f.l -side left
        pack $base.f.e $base.opt.c $base.opt.r -side left -fill both -expand 1
        pack [frame $base.sep -bd 2 -relief sunken -height 4] -fill x
        pack [frame $base.btn] -fill both
        button $base.btn.fnd -text "Find" -width 6
        button $base.btn.clr -text "Clear" -width 6
        button $base.btn.dis -text "Dismiss" -width 6
        eval pack [winfo children $base.btn] -padx 4 -pady 2 \
                -side left -fill both

        focus $base.f.e

        bind $base.f.e <Return> [list $base.btn.fnd invoke]
        bind $base.f.e <Escape> [list $base.btn.dis invoke]
    }
    $base.btn.fnd config -command "::tkcon::Find [list $w] \$::tkcon::PRIV(find) \
            -case \$::tkcon::PRIV(find,case) -reg \$::tkcon::PRIV(find,reg)"
    $base.btn.clr config -command "
    [list $w] tag remove find 1.0 end
    set ::tkcon::PRIV(find) {}
    "
    $base.btn.dis config -command "
    [list $w] tag remove find 1.0 end
    wm withdraw [list $base]
    "
    if {[string compare {} $str]} {
        set PRIV(find) $str
        $base.btn.fnd invoke
    }

    if {[string compare normal [wm state $base]]} {
        wm deiconify $base
    } else { raise $base }
    $base.f.e select range 0 end
}

## ::tkcon::Find - searches in text widget $w for $str and highlights it
## If $str is empty, it just deletes any highlighting
# ARGS: w       - text widget
#       str     - string to search for
#       -case   TCL_BOOLEAN     whether to be case sensitive    DEFAULT: 0
#       -regexp TCL_BOOLEAN     whether to use $str as pattern  DEFAULT: 0
##
proc ::tkcon::Find {w str args} {
    $w tag remove find 1.0 end
    set truth {^(1|yes|true|on)$}
    set opts  {}
    foreach {key val} $args {
        switch -glob -- $key {
            -c* { if {[regexp -nocase $truth $val]} { set case 1 } }
            -r* { if {[regexp -nocase $truth $val]} { lappend opts -regexp } }
            default { return -code error "Unknown option $key" }
        }
    }
    if {![info exists case]} { lappend opts -nocase }
    if {[string match {} $str]} return
    $w mark set findmark 1.0
    while {[string compare {} [set ix [eval $w search $opts -count numc -- \
            [list $str] findmark end]]]} {
        $w tag add find $ix ${ix}+${numc}c
        $w mark set findmark ${ix}+1c
    }
    $w tag configure find -background $::tkcon::COLOR(blink)
    catch {$w see find.first}
    return [expr {[llength [$w tag ranges find]]/2}]
}

## ::tkcon::Attach - called to attach tkcon to an interpreter
# ARGS: name    - application name to which tkcon sends commands
#                 This is either a slave interperter name or tk appname.
#       type    - (slave|interp) type of interpreter we're attaching to
#                 slave means it's a tkcon interpreter
#                 interp means we'll need to 'send' to it.
# Results:      ::tkcon::EvalAttached is recreated to evaluate in the
#               appropriate interpreter
##
proc ::tkcon::Attach {{name <NONE>} {type slave}} {
    variable PRIV
    variable OPT

    if {[llength [info level 0]] == 1} {
        # no args were specified, return the attach info instead
        if {[string match {} $PRIV(appname)]} {
            return [list [concat $PRIV(name) $OPT(exec)] $PRIV(apptype)]
        } else {
            return [list $PRIV(appname) $PRIV(apptype)]
        }
    }
    set path [concat $PRIV(name) $OPT(exec)]

    set PRIV(displayWin) .
    if {[string match namespace $type]} {
        return [uplevel 1 ::tkcon::AttachNamespace $name]
    } elseif {[string match dpy:* $type]} {
        set PRIV(displayWin) [string range $type 4 end]
    } elseif {[string match sock* $type]} {
        global tcl_version
        if {[catch {eof $name} res]} {
            return -code error "No known channel \"$name\""
        } elseif {$res} {
            catch {close $name}
            return -code error "Channel \"$name\" returned EOF"
        }
        set app $name
        set type socket
    } elseif {[string compare {} $name]} {
        array set interps [Interps]
        if {[string match {[Mm]ain} [lindex $name 0]]} {
            set name [lrange $name 1 end]
        }
        if {[string match $path $name]} {
            set name {}
            set app $path
            set type slave
        } elseif {[info exists interps($name)]} {
            if {[string match {} $name]} { set name Main; set app Main }
            set type slave
        } elseif {[interp exists $name]} {
            set name [concat $PRIV(name) $name]
            set type slave
        } elseif {[interp exists [concat $OPT(exec) $name]]} {
            set name [concat $path $name]
            set type slave
        } elseif {[lsearch -exact [winfo interps] $name] > -1} {
            if {[EvalSlave info exists tk_library] \
                    && [string match $name [EvalSlave tk appname]]} {
                set name {}
                set app $path
                set type slave
            } elseif {[set i [lsearch -exact \
                    [Main set ::tkcon::PRIV(interps)] $name]] != -1} {
                set name [lindex [Main set ::tkcon::PRIV(slaves)] $i]
                if {[string match {[Mm]ain} $name]} { set app Main }
                set type slave
            } else {
                set type interp
            }
        } else {
            return -code error "No known interpreter \"$name\""
        }
    } else {
        set app $path
    }
    if {![info exists app]} { set app $name }
    array set PRIV [list app $app appname $name apptype $type deadapp 0]

    ## ::tkcon::EvalAttached - evaluates the args in the attached interp
    ## args should be passed to this procedure as if they were being
    ## passed to the 'eval' procedure.  This procedure is dynamic to
    ## ensure evaluation occurs in the right interp.
    # ARGS:     args    - the command and args to evaluate
    ##
    switch -glob -- $type {
        slave {
            if {[string match {} $name]} {
                interp alias {} ::tkcon::EvalAttached {} \
                        ::tkcon::EvalSlave uplevel \#0
            } elseif {[string match Main $PRIV(app)]} {
                interp alias {} ::tkcon::EvalAttached {} ::tkcon::Main
            } elseif {[string match $PRIV(name) $PRIV(app)]} {
                interp alias {} ::tkcon::EvalAttached {} uplevel \#0
            } else {
                interp alias {} ::tkcon::EvalAttached {} \
                        ::tkcon::Slave $::tkcon::PRIV(app)
            }
        }
        sock* {
            interp alias {} ::tkcon::EvalAttached {} \
                    ::tkcon::EvalSlave uplevel \#0
            # The file event will just puts whatever data is found
            # into the interpreter
            fconfigure $name -buffering line -blocking 0
            fileevent $name readable ::tkcon::EvalSocketEvent
        }
        dpy:* -
        interp {
            if {$OPT(nontcl)} {
                interp alias {} ::tkcon::EvalAttached {} ::tkcon::EvalSlave
                set PRIV(namesp) ::
            } else {
                interp alias {} ::tkcon::EvalAttached {} ::tkcon::EvalSend
            }
        }
        default {
            return -code error "[lindex [info level 0] 0] did not specify\
                    a valid type: must be slave or interp"
        }
    }
    if {[string match slave $type] || \
            (!$OPT(nontcl) && [regexp {^(interp|dpy)} $type])} {
        set PRIV(namesp) ::
    }
    set PRIV(StatusAttach) "$PRIV(app) ($PRIV(apptype))"
    return
}

## ::tkcon::AttachNamespace - called to attach tkcon to a namespace
# ARGS: name    - namespace name in which tkcon should eval commands
# Results:      ::tkcon::EvalAttached will be modified
##
proc ::tkcon::AttachNamespace { name } {
    variable PRIV
    variable OPT

    if {($OPT(nontcl) && [string match interp $PRIV(apptype)]) \
            || [string match socket $PRIV(apptype)] \
            || $PRIV(deadapp)} {
        return -code error "can't attach to namespace in attached environment"
    }
    if {[string match Main $name]} {set name ::}
    if {[string compare {} $name] && \
            [lsearch [Namespaces ::] $name] == -1} {
        return -code error "No known namespace \"$name\""
    }
    if {[regexp {^(|::)$} $name]} {
        ## If name=={} || ::, we want the primary namespace
        set alias [interp alias {} ::tkcon::EvalAttached]
        if {[string match ::tkcon::EvalNamespace* $alias]} {
            eval [list interp alias {} ::tkcon::EvalAttached {}] \
                    [lindex $alias 1]
        }
        set name ::
    } else {
        interp alias {} ::tkcon::EvalAttached {} ::tkcon::EvalNamespace \
                [interp alias {} ::tkcon::EvalAttached] [list $name]
    }
    set PRIV(namesp) $name
    set PRIV(StatusAttach) "$PRIV(app) $PRIV(namesp) ($PRIV(apptype))"
}

## ::tkcon::NewSocket - called to create a socket to connect to
# ARGS: none
# Results:      It will create a socket, and attach if requested
##
proc ::tkcon::NewSocket {} {
    variable PRIV

    set t $PRIV(base).newsock
    if {![winfo exists $t]} {
        toplevel $t
        wm withdraw $t
        wm title $t "tkcon Create Socket"
        label $t.lhost -text "Host: "
        entry $t.host -width 20
        label $t.lport -text "Port: "
        entry $t.port -width 4
        button $t.ok -text "OK" -command {set ::tkcon::PRIV(grab) 1}
        bind $t.host <Return> [list focus $t.port]
        bind $t.port <Return> [list focus $t.ok]
        bind $t.ok   <Return> [list $t.ok invoke]
        grid $t.lhost $t.host $t.lport $t.port -sticky ew
        grid $t.ok      -       -       -        -sticky ew
        grid columnconfig $t 1 -weight 1
        grid rowconfigure $t 1 -weight 1
        wm transient $t $PRIV(root)
        wm geometry $t +[expr {([winfo screenwidth $t]-[winfo \
                reqwidth $t]) / 2}]+[expr {([winfo \
                screenheight $t]-[winfo reqheight $t]) / 2}]
    }
    #$t.host delete 0 end
    #$t.port delete 0 end
    wm deiconify $t
    raise $t
    grab $t
    focus $t.host
    vwait ::tkcon::PRIV(grab)
    grab release $t
    wm withdraw $t
    set host [$t.host get]
    set port [$t.port get]
    if {$host == ""} { return }
    if {[catch {
        set sock [socket $host $port]
    } err]} {
        tk_messageBox -title "Socket Connection Error" \
                -message "Unable to connect to \"$host:$port\":\n$err" \
                -icon error -type ok
    } else {
        Attach $sock socket
    }
}

## ::tkcon::Load - sources a file into the console
## The file is actually sourced in the currently attached's interp
# ARGS: fn      - (optional) filename to source in
# Returns:      selected filename ({} if nothing was selected)
## 
proc ::tkcon::Load { {fn ""} } {
    set types {
        {{Tcl Files}    {.tcl .tk}}
        {{Text Files}   {.txt}}
        {{All Files}    *}
    }
    if {
        [string match {} $fn] &&
        ([catch {tk_getOpenFile -filetypes $types \
            -title "Source File"} fn] || [string match {} $fn])
    } { return }
    EvalAttached [list source $fn]
}

## ::tkcon::Save - saves the console or other widget buffer to a file
## This does not eval in a slave because it's not necessary
# ARGS: w       - console text widget
#       fn      - (optional) filename to save to
## 
proc ::tkcon::Save { {fn ""} {type ""} {opt ""} {mode w} } {
    variable PRIV

    if {![regexp -nocase {^(all|history|stdin|stdout|stderr|widget)$} $type]} {
        array set s { 0 All 1 History 2 Stdin 3 Stdout 4 Stderr 5 Cancel }
        ## Allow user to specify what kind of stuff to save
        set type [tk_dialog $PRIV(base).savetype "Save Type" \
                "What part of the text do you want to save?" \
                questhead 0 $s(0) $s(1) $s(2) $s(3) $s(4) $s(5)]
        if {$type == 5 || $type == -1} return
        set type $s($type)
    }
    if {[string match {} $fn]} {
        set types {
            {{Tcl Files}        {.tcl .tk}}
            {{Text Files}       {.txt}}
            {{All Files}        *}
        }
        if {[catch {tk_getSaveFile -defaultextension .tcl -filetypes $types \
                -title "Save $type"} fn] || [string match {} $fn]} return
    }
    set type [string tolower $type]
    switch $type {
        stdin - stdout - stderr {
            set data {}
            foreach {first last} [$PRIV(console) tag ranges $type] {
                lappend data [$PRIV(console) get $first $last]
            }
            set data [join $data \n]
        }
        history         { set data [tkcon history] }
        all - default   { set data [$PRIV(console) get 1.0 end-1c] }
        widget          {
            set data [$opt get 1.0 end-1c]
        }
    }
    if {[catch {open $fn $mode} fid]} {
        return -code error "Save Error: Unable to open '$fn' for writing\n$fid"
    }
    puts -nonewline $fid $data
    close $fid
}

## ::tkcon::MainInit
## This is only called for the main interpreter to include certain procs
## that we don't want to include (or rather, just alias) in slave interps.
##
proc ::tkcon::MainInit {} {
    variable PRIV

    if {![info exists PRIV(slaves)]} {
        array set PRIV [list slave 0 slaves Main name {} \
                interps [list [tk appname]]]
    }
    interp alias {} ::tkcon::Main {} ::tkcon::InterpEval Main
    interp alias {} ::tkcon::Slave {} ::tkcon::InterpEval

    proc ::tkcon::GetSlaveNum {} {
        set i -1
        while {[interp exists Slave[incr i]]} {
            # oh my god, an empty loop!
        }
        return $i
    }

    ## ::tkcon::New - create new console window
    ## Creates a slave interpreter and sources in this script.
    ## All other interpreters also get a command to eval function in the
    ## new interpreter.
    ## 
    proc ::tkcon::New {} {
        variable PRIV
        global argv0 argc argv

        set tmp [interp create Slave[GetSlaveNum]]
        lappend PRIV(slaves) $tmp
        load {} Tk $tmp
        lappend PRIV(interps) [$tmp eval [list tk appname \
                "[tk appname] $tmp"]]
        if {[info exist argv0]} {$tmp eval [list set argv0 $argv0]}
        $tmp eval set argc $argc
        $tmp eval [list set argv $argv]
        $tmp eval [list namespace eval ::tkcon {}]
        $tmp eval [list set ::tkcon::PRIV(name) $tmp]
        $tmp eval [list set ::tkcon::PRIV(SCRIPT) $::tkcon::PRIV(SCRIPT)]
        $tmp alias exit                         ::tkcon::Exit $tmp
        $tmp alias ::tkcon::Destroy             ::tkcon::Destroy $tmp
        $tmp alias ::tkcon::New                 ::tkcon::New
        $tmp alias ::tkcon::Main                ::tkcon::InterpEval Main
        $tmp alias ::tkcon::Slave               ::tkcon::InterpEval
        $tmp alias ::tkcon::Interps             ::tkcon::Interps
        $tmp alias ::tkcon::NewDisplay          ::tkcon::NewDisplay
        $tmp alias ::tkcon::Display             ::tkcon::Display
        $tmp alias ::tkcon::StateCheckpoint     ::tkcon::StateCheckpoint
        $tmp alias ::tkcon::StateCleanup        ::tkcon::StateCleanup
        $tmp alias ::tkcon::StateCompare        ::tkcon::StateCompare
        $tmp alias ::tkcon::StateRevert         ::tkcon::StateRevert
        $tmp eval {
            if [catch {source -rsrc tkcon}] { source $::tkcon::PRIV(SCRIPT) }
        }
        return $tmp
    }

    ## ::tkcon::Exit - full exit OR destroy slave console
    ## This proc should only be called in the main interpreter from a slave.
    ## The master determines whether we do a full exit or just kill the slave.
    ## 
    proc ::tkcon::Exit {slave args} {
        variable PRIV
        variable OPT

        ## Slave interpreter exit request
        if {[string match exit $OPT(slaveexit)]} {
            ## Only exit if it specifically is stated to do so
            uplevel 1 exit $args
        }
        ## Otherwise we will delete the slave interp and associated data
        set name [InterpEval $slave]
        set PRIV(interps) [lremove $PRIV(interps) [list $name]]
        set PRIV(slaves)  [lremove $PRIV(slaves) [list $slave]]
        interp delete $slave
        StateCleanup $slave
        return
    }

    ## ::tkcon::Destroy - destroy console window
    ## This proc should only be called by the main interpreter.  If it is
    ## called from there, it will ask before exiting tkcon.  All others
    ## (slaves) will just have their slave interpreter deleted, closing them.
    ## 
    proc ::tkcon::Destroy {{slave {}}} {
        variable PRIV

        if {[string match {} $slave]} {
            ## Main interpreter close request
            if {[tk_dialog $PRIV(base).destroyme {Quit tkcon?} \
                    {Closing the Main console will quit tkcon} \
                    warning 0 "Don't Quit" "Quit tkcon"]} exit
        } else {
            ## Slave interpreter close request
            set name [InterpEval $slave]
            set PRIV(interps) [lremove $PRIV(interps) [list $name]]
            set PRIV(slaves)  [lremove $PRIV(slaves) [list $slave]]
            interp delete $slave
        }
        StateCleanup $slave
        return
    }

    ## We want to do a couple things before exiting...
    if {[catch {rename ::exit ::tkcon::FinalExit} err]} {
        puts stderr "tkcon might panic:\n$err"
    }
    proc ::exit args {
        if {$::tkcon::OPT(usehistory)} {
            if {[catch {open $::tkcon::PRIV(histfile) w} fid]} {
                puts stderr "unable to save history file:\n$fid"
                # pause a moment, because we are about to die finally...
                after 1000
            } else {
                set max [::tkcon::EvalSlave history nextid]
                set id [expr {$max - $::tkcon::OPT(history)}]
                if {$id < 1} { set id 1 }
                ## FIX: This puts history in backwards!!
                while {($id < $max) && \
                        ![catch {::tkcon::EvalSlave history event $id} cmd]} {
                    if {[string compare {} $cmd]} {
                        puts $fid "::tkcon::EvalSlave history add [list $cmd]"
                    }
                    incr id
                }
                close $fid
            }
        }
        uplevel 1 ::tkcon::FinalExit $args
    }

    ## ::tkcon::InterpEval - passes evaluation to another named interpreter
    ## If the interpreter is named, but no args are given, it returns the
    ## [tk appname] of that interps master (not the associated eval slave).
    ##
    proc ::tkcon::InterpEval {{slave {}} args} {
        variable PRIV

        if {[string match {} $slave]} {
            return $PRIV(slaves)
        } elseif {[string match {[Mm]ain} $slave]} {
            set slave {}
        }
        if {[llength $args]} {
            return [interp eval $slave uplevel \#0 $args]
        } else {
            return [interp eval $slave tk appname]
        }
    }

    proc ::tkcon::Interps {{ls {}} {interp {}}} {
        if {[string match {} $interp]} { lappend ls {} [tk appname] }
        foreach i [interp slaves $interp] {
            if {[string compare {} $interp]} { set i "$interp $i" }
            if {[string compare {} [interp eval $i package provide Tk]]} {
                lappend ls $i [interp eval $i tk appname]
            } else {
                lappend ls $i {}
            }
            set ls [Interps $ls $i]
        }
        return $ls
    }

    proc ::tkcon::Display {{disp {}}} {
        variable DISP

        set res {}
        if {$disp != ""} {
            if {![info exists DISP($disp)]} { return }
            return [list $DISP($disp) [winfo interps -displayof $DISP($disp)]]
        }
        return [lsort -dictionary [array names DISP]]
    }

    proc ::tkcon::NewDisplay {} {
        variable PRIV
        variable DISP

        set t $PRIV(base).newdisp
        if {![winfo exists $t]} {
            toplevel $t
            wm withdraw $t
            wm title $t "tkcon Attach to Display"
            label $t.gets -text "New Display: "
            entry $t.data -width 32
            button $t.ok -text "OK" -command {set ::tkcon::PRIV(grab) 1}
            bind $t.data <Return> [list $t.ok invoke]
            bind $t.ok   <Return> [list $t.ok invoke]
            grid $t.gets $t.data -sticky ew
            grid $t.ok   -       -sticky ew
            grid columnconfig $t 1 -weight 1
            grid rowconfigure $t 1 -weight 1
            wm transient $t $PRIV(root)
            wm geometry $t +[expr {([winfo screenwidth $t]-[winfo \
                    reqwidth $t]) / 2}]+[expr {([winfo \
                    screenheight $t]-[winfo reqheight $t]) / 2}]
        }
        $t.data delete 0 end
        wm deiconify $t
        raise $t
        grab $t
        focus $t.data
        vwait ::tkcon::PRIV(grab)
        grab release $t
        wm withdraw $t
        set disp [$t.data get]
        if {$disp == ""} { return }
        regsub -all {\.} [string tolower $disp] ! dt
        set dt $PRIV(base).$dt
        destroy $dt
        if {[catch {
            toplevel $dt -screen $disp
            set interps [winfo interps -displayof $dt]
            if {![llength $interps]} {
                error "No other Tk interpreters on $disp"
            }
            send -displayof $dt [lindex $interps 0] [list info tclversion]
        } err]} {
            global env
            if {[info exists env(DISPLAY)]} {
                set myd $env(DISPLAY)
            } else {
                set myd "myDisplay:0"
            }
            tk_messageBox -title "Display Connection Error" \
                    -message "Unable to connect to \"$disp\":\n$err\
                    \nMake sure you have xauth-based permissions\
                    (xauth add $myd . `mcookie`), and xhost is disabled\
                    (xhost -) on \"$disp\"" \
                    -icon error -type ok
            destroy $dt
            return
        }
        set DISP($disp) $dt
        wm withdraw $dt
        bind $dt <Destroy> [subst {catch {unset ::tkcon::DISP($disp)}}]
        tk_messageBox -title "$disp Connection" \
                -message "Connected to \"$disp\", found:\n[join $interps \n]" \
                -type ok
    }

    ##
    ## The following state checkpoint/revert procedures are very sketchy
    ## and prone to problems.  They do not track modifications to currently
    ## existing procedures/variables, and they can really screw things up
    ## if you load in libraries (especially Tk) between checkpoint and
    ## revert.  Only with this knowledge in mind should you use these.
    ##

    ## ::tkcon::StateCheckpoint - checkpoints the current state of the system
    ## This allows you to return to this state with ::tkcon::StateRevert
    # ARGS:
    ##
    proc ::tkcon::StateCheckpoint {app type} {
        variable CPS
        variable PRIV

        if {[info exists CPS($type,$app,cmd)] && \
                [tk_dialog $PRIV(base).warning "Overwrite Previous State?" \
                "Are you sure you want to lose previously checkpointed\
                state of $type \"$app\"?" questhead 1 "Do It" "Cancel"]} return
        set CPS($type,$app,cmd) [EvalOther $app $type info commands *]
        set CPS($type,$app,var) [EvalOther $app $type info vars *]
        return
    }

    ## ::tkcon::StateCompare - compare two states and output difference
    # ARGS:
    ##
    proc ::tkcon::StateCompare {app type {verbose 0}} {
        variable CPS
        variable PRIV
        variable OPT
        variable COLOR

        if {![info exists CPS($type,$app,cmd)]} {
            return -code error \
                    "No previously checkpointed state for $type \"$app\""
        }
        set w $PRIV(base).compare
        if {[winfo exists $w]} {
            $w.text config -state normal
            $w.text delete 1.0 end
        } else {
            toplevel $w
            frame $w.btn
            scrollbar $w.sy -takefocus 0 -bd 1 -command [list $w.text yview]
            text $w.text -yscrollcommand [list $w.sy set] -height 12 \
                    -foreground $COLOR(stdin) \
                    -background $COLOR(bg) \
                    -insertbackground $COLOR(cursor) \
                    -font $OPT(font)
            pack $w.btn -side bottom -fill x
            pack $w.sy -side right -fill y
            pack $w.text -fill both -expand 1
            button $w.btn.close -text "Dismiss" -width 11 \
                    -command [list destroy $w]
            button $w.btn.check  -text "Recheckpoint" -width 11
            button $w.btn.revert -text "Revert" -width 11
            button $w.btn.expand -text "Verbose" -width 11
            button $w.btn.update -text "Update" -width 11
            pack $w.btn.check $w.btn.revert $w.btn.expand $w.btn.update \
                    $w.btn.close -side left -fill x -padx 4 -pady 2 -expand 1
            $w.text tag config red -foreground red
        }
        wm title $w "Compare State: $type [list $app]"

        $w.btn.check config \
                -command "::tkcon::StateCheckpoint [list $app] $type; \
                ::tkcon::StateCompare [list $app] $type $verbose"
        $w.btn.revert config \
                -command "::tkcon::StateRevert [list $app] $type; \
                ::tkcon::StateCompare [list $app] $type $verbose"
        $w.btn.update config -command [info level 0]
        if {$verbose} {
            $w.btn.expand config -text Brief \
                    -command [list ::tkcon::StateCompare $app $type 0]
        } else {
            $w.btn.expand config -text Verbose \
                    -command [list ::tkcon::StateCompare $app $type 1]
        }
        ## Don't allow verbose mode unless 'dump' exists in $app
        ## We're assuming this is tkcon's dump command
        set hasdump [llength [EvalOther $app $type info commands dump]]
        if {$hasdump} {
            $w.btn.expand config -state normal
        } else {
            $w.btn.expand config -state disabled
        }

        set cmds [lremove [EvalOther $app $type info commands *] \
                $CPS($type,$app,cmd)]
        set vars [lremove [EvalOther $app $type info vars *] \
                $CPS($type,$app,var)]

        if {$hasdump && $verbose} {
            set cmds [EvalOther $app $type eval dump c -nocomplain $cmds]
            set vars [EvalOther $app $type eval dump v -nocomplain $vars]
        }
        $w.text insert 1.0 "NEW COMMANDS IN \"$app\":\n" red \
                $cmds {} "\n\nNEW VARIABLES IN \"$app\":\n" red $vars {}

        raise $w
        $w.text config -state disabled
    }

    ## ::tkcon::StateRevert - reverts interpreter to previous state
    # ARGS:
    ##
    proc ::tkcon::StateRevert {app type} {
        variable CPS
        variable PRIV

        if {![info exists CPS($type,$app,cmd)]} {
            return -code error \
                    "No previously checkpointed state for $type \"$app\""
        }
        if {![tk_dialog $PRIV(base).warning "Revert State?" \
                "Are you sure you want to revert the state in $type \"$app\"?"\
                questhead 1 "Do It" "Cancel"]} {
            foreach i [lremove [EvalOther $app $type info commands *] \
                    $CPS($type,$app,cmd)] {
                catch {EvalOther $app $type rename $i {}}
            }
            foreach i [lremove [EvalOther $app $type info vars *] \
                    $CPS($type,$app,var)] {
                catch {EvalOther $app $type unset $i}
            }
        }
    }

    ## ::tkcon::StateCleanup - cleans up state information in master array
    #
    ##
    proc ::tkcon::StateCleanup {args} {
        variable CPS

        if {![llength $args]} {
            foreach state [array names CPS slave,*] {
                if {![interp exists [string range $state 6 end]]} {
                    unset CPS($state)
                }
            }
        } else {
            set app  [lindex $args 0]
            set type [lindex $args 1]
            if {[regexp {^(|slave)$} $type]} {
                foreach state [array names CPS "slave,$app\[, \]*"] {
                    if {![interp exists [string range $state 6 end]]} {
                        unset CPS($state)
                    }
                }
            } else {
                catch {unset CPS($type,$app)}
            }
        }
    }
}

## ::tkcon::Event - get history event, search if string != {}
## look forward (next) if $int>0, otherwise look back (prev)
# ARGS: W       - console widget
##
proc ::tkcon::Event {int {str {}}} {
    if {!$int} return

    variable PRIV
    set w $PRIV(console)

    set nextid [EvalSlave history nextid]
    if {[string compare {} $str]} {
        ## String is not empty, do an event search
        set event $PRIV(event)
        if {$int < 0 && $event == $nextid} { set PRIV(cmdbuf) $str }
        set len [string len $PRIV(cmdbuf)]
        incr len -1
        if {$int > 0} {
            ## Search history forward
            while {$event < $nextid} {
                if {[incr event] == $nextid} {
                    $w delete limit end
                    $w insert limit $PRIV(cmdbuf)
                    break
                } elseif {
                    ![catch {EvalSlave history event $event} res] &&
                    [set p [string first $PRIV(cmdbuf) $res]] > -1
                } {
                    set p2 [expr {$p + [string length $PRIV(cmdbuf)]}]
                    $w delete limit end
                    $w insert limit $res
                    Blink $w "limit + $p c" "limit + $p2 c"
                    break
                }
            }
            set PRIV(event) $event
        } else {
            ## Search history reverse
            while {![catch {EvalSlave history event [incr event -1]} res]} {
                if {[set p [string first $PRIV(cmdbuf) $res]] > -1} {
                    set p2 [expr {$p + [string length $PRIV(cmdbuf)]}]
                    $w delete limit end
                    $w insert limit $res
                    set PRIV(event) $event
                    Blink $w "limit + $p c" "limit + $p2 c"
                    break
                }
            }
        }
    } else {
        ## String is empty, just get next/prev event
        if {$int > 0} {
            ## Goto next command in history
            if {$PRIV(event) < $nextid} {
                $w delete limit end
                if {[incr PRIV(event)] == $nextid} {
                    $w insert limit $PRIV(cmdbuf)
                } else {
                    $w insert limit [EvalSlave history event $PRIV(event)]
                }
            }
        } else {
            ## Goto previous command in history
            if {$PRIV(event) == $nextid} {
                set PRIV(cmdbuf) [CmdGet $w]
            }
            if {[catch {EvalSlave history event [incr PRIV(event) -1]} res]} {
                incr PRIV(event)
            } else {
                $w delete limit end
                $w insert limit $res
            }
        }
    }
    $w mark set insert end
    $w see end
}

## ::tkcon::ErrorHighlight - magic error highlighting
## beware: voodoo included
# ARGS:
##
proc ::tkcon::ErrorHighlight w {
    variable COLOR

    ## do voodoo here
    set app [Attach]
    # we have to pull the text out, because text regexps are screwed on \n's.
    set info [$w get 1.0 end-1c]
    # Check for specific line error in a proc
    set exp(proc) "\"(\[^\"\]+)\"\n\[\t \]+\\\(procedure \"(\[^\"\]+)\""
    # Check for too few args to a proc
    set exp(param) "parameter \"(\[^\"\]+)\" to \"(\[^\"\]+)\""
    set start 1.0
    while {
        [regexp -indices -- $exp(proc) $info junk what cmd] ||
        [regexp -indices -- $exp(param) $info junk what cmd]
    } {
        foreach {w0 w1} $what {c0 c1} $cmd {break}
        set what [string range $info $w0 $w1]
        set cmd  [string range $info $c0 $c1]
        if {[string match *::* $cmd]} {
            set res [uplevel 1 ::tkcon::EvalOther $app namespace eval \
                    [list [namespace qualifiers $cmd] \
                    [list info procs [namespace tail $cmd]]]]
        } else {
            set res [uplevel 1 ::tkcon::EvalOther $app info procs [list $cmd]]
        }
        if {[llength $res]==1} {
            set tag [UniqueTag $w]
            $w tag add $tag $start+${c0}c $start+1c+${c1}c
            $w tag configure $tag -foreground $COLOR(stdout)
            $w tag bind $tag <Enter> [list $w tag configure $tag -underline 1]
            $w tag bind $tag <Leave> [list $w tag configure $tag -underline 0]
            $w tag bind $tag <ButtonRelease-1> "if {!\$tkPriv(mouseMoved)} \
                    {[list edit -attach $app -type proc -find $what -- $cmd]}"
        }
        set info [string range $info $c1 end]
        set start [$w index $start+${c1}c]
    }
    ## Next stage, check for procs that start a line
    set start 1.0
    set exp(cmd) "^\"\[^\" \t\n\]+"
    while {
        [string compare {} [set ix \
                [$w search -regexp -count numc -- $exp(cmd) $start end]]]
    } {
        set start [$w index $ix+${numc}c]
        # +1c to avoid the first quote
        set cmd [$w get $ix+1c $start]
        if {[string match *::* $cmd]} {
            set res [uplevel 1 ::tkcon::EvalOther $app namespace eval \
                    [list [namespace qualifiers $cmd] \
                    [list info procs [namespace tail $cmd]]]]
        } else {
            set res [uplevel 1 ::tkcon::EvalOther $app info procs [list $cmd]]
        }
        if {[llength $res]==1} {
            set tag [UniqueTag $w]
            $w tag add $tag $ix+1c $start
            $w tag configure $tag -foreground $COLOR(proc)
            $w tag bind $tag <Enter> [list $w tag configure $tag -underline 1]
            $w tag bind $tag <Leave> [list $w tag configure $tag -underline 0]
            $w tag bind $tag <ButtonRelease-1> "if {!\$tkPriv(mouseMoved)} \
                    {[list edit -attach $app -type proc -- $cmd]}"
        }
    }
}

## tkcon - command that allows control over the console
## This always exists in the main interpreter, and is aliased into
## other connected interpreters
# ARGS: totally variable, see internal comments
## 
proc tkcon {cmd args} {
    global errorInfo

    switch -glob -- $cmd {
        buf* {
            ## 'buffer' Sets/Query the buffer size
            if {[llength $args]} {
                if {[regexp {^[1-9][0-9]*$} $args]} {
                    set ::tkcon::OPT(buffer) $args
                    # catch in case the console doesn't exist yet
                    catch {::tkcon::ConstrainBuffer $::tkcon::PRIV(console) \
                            $::tkcon::OPT(buffer)}
                } else {
                    return -code error "buffer must be a valid integer"
                }
            }
            return $::tkcon::OPT(buffer)
        }
        bg* {
            ## 'bgerror' Brings up an error dialog
            set errorInfo [lindex $args 1]
            bgerror [lindex $args 0]
        }
        cl* {
            ## 'close' Closes the console
            ::tkcon::Destroy
        }
        cons* {
            ## 'console' - passes the args to the text widget of the console.
            set result [uplevel 1 $::tkcon::PRIV(console) $args]
            ::tkcon::ConstrainBuffer $::tkcon::PRIV(console) \
                    $::tkcon::OPT(buffer)
            return $result
        }
        congets {
            ## 'congets' a replacement for [gets stdin]
            # Use the 'gets' alias of 'tkcon_gets' command instead of
            # calling the *get* methods directly for best compatability
            if {[llength $args] > 1} {
                return -code error "wrong # args: must be \"tkcon congets [pfix]\""
            }
            tkcon show
            set old [bind TkConsole <<TkCon_Eval>>]
            bind TkConsole <<TkCon_Eval>> { set ::tkcon::PRIV(wait) 0 }
            set w $::tkcon::PRIV(console)
            # Make sure to move the limit to get the right data
            $w mark set insert end
            if {[llength $args]} {
                $w mark set limit insert
                $w insert end $args
            } else {
                $w mark set limit insert
            }
            $w see end
            vwait ::tkcon::PRIV(wait)
            set line [::tkcon::CmdGet $w]
            $w insert end \n
            bind TkConsole <<TkCon_Eval>> $old
            return $line
        }
        getc* {
            ## 'getcommand' a replacement for [gets stdin]
            ## This forces a complete command to be input though
            if {[llength $args]} {
                return -code error "wrong # args: must be \"tkcon getcommand\""
            }
            tkcon show
            set old [bind TkConsole <<TkCon_Eval>>]
            bind TkConsole <<TkCon_Eval>> { set ::tkcon::PRIV(wait) 0 }
            set w $::tkcon::PRIV(console)
            # Make sure to move the limit to get the right data
            $w mark set insert end
            $w mark set limit insert
            $w see end
            vwait ::tkcon::PRIV(wait)
            set line [::tkcon::CmdGet $w]
            $w insert end \n
            while {![info complete $line] || [regexp {[^\\]\\$} $line]} {
                vwait ::tkcon::PRIV(wait)
                set line [::tkcon::CmdGet $w]
                $w insert end \n
                $w see end
            }
            bind TkConsole <<TkCon_Eval>> $old
            return $line
        }
        get - gets {
            ## 'gets' - a replacement for [gets stdin]
            ## This pops up a text widget to be used for stdin (local grabbed)
            if {[llength $args]} {
                return -code error "wrong # args: should be \"tkcon gets\""
            }
            set t $::tkcon::PRIV(base).gets
            if {![winfo exists $t]} {
                toplevel $t
                wm withdraw $t
                wm title $t "tkcon gets stdin request"
                label $t.gets -text "\"gets stdin\" request:"
                text $t.data -width 32 -height 5 -wrap none \
                        -xscrollcommand [list $t.sx set] \
                        -yscrollcommand [list $t.sy set]
                scrollbar $t.sx -orient h -takefocus 0 -highlightthick 0 \
                        -command [list $t.data xview]
                scrollbar $t.sy -orient v -takefocus 0 -highlightthick 0 \
                        -command [list $t.data yview]
                button $t.ok -text "OK" -command {set ::tkcon::PRIV(grab) 1}
                bind $t.ok <Return> { %W invoke }
                grid $t.gets -          -sticky ew
                grid $t.data $t.sy      -sticky news
                grid $t.sx              -sticky ew
                grid $t.ok   -          -sticky ew
                grid columnconfig $t 0 -weight 1
                grid rowconfig    $t 1 -weight 1
                wm transient $t $::tkcon::PRIV(root)
                wm geometry $t +[expr {([winfo screenwidth $t]-[winfo \
                        reqwidth $t]) / 2}]+[expr {([winfo \
                        screenheight $t]-[winfo reqheight $t]) / 2}]
            }
            $t.data delete 1.0 end
            wm deiconify $t
            raise $t
            grab $t
            focus $t.data
            vwait ::tkcon::PRIV(grab)
            grab release $t
            wm withdraw $t
            return [$t.data get 1.0 end-1c]
        }
        err* {
            ## Outputs stack caused by last error.
            ## error handling with pizazz (but with pizza would be nice too)
            if {[llength $args]==2} {
                set app  [lindex $args 0]
                set type [lindex $args 1]
                if {[catch {::tkcon::EvalOther $app $type set errorInfo} info]} {
                    set info "error getting info from $type $app:\n$info"
                }
            } else {
                set info $::tkcon::PRIV(errorInfo)
            }
            if {[string match {} $info]} { set info "errorInfo empty" }
            ## If args is empty, the -attach switch just ignores it
            edit -attach $args -type error -- $info
        }
        fi* {
            ## 'find' string
            ::tkcon::Find $::tkcon::PRIV(console) $args
        }
        fo* {
            ## 'font' ?fontname? - gets/sets the font of the console
            if {[llength $args]} {
                if {[info exists ::tkcon::PRIV(console)] && \
                        [winfo exists $::tkcon::PRIV(console)]} {
                    $::tkcon::PRIV(console) config -font $args
                    set ::tkcon::OPT(font) [$::tkcon::PRIV(console) cget -font]
                } else {
                    set ::tkcon::OPT(font) $args
                }
            }
            return $::tkcon::OPT(font)
        }
        hid* - with* {
            ## 'hide' 'withdraw' - hides the console.
            wm withdraw $::tkcon::PRIV(root)
        }
        his* {
            ## 'history'
            set sub {\2}
            if {[string match -new* $args]} { append sub "\n"}
            set h [::tkcon::EvalSlave history]
            regsub -all "( *\[0-9\]+  |\t)(\[^\n\]*\n?)" $h $sub h
            return $h
        }
        ico* {
            ## 'iconify' - iconifies the console with 'iconify'.
            wm iconify $::tkcon::PRIV(root)
        }
        mas* - eval {
            ## 'master' - evals contents in master interpreter
            uplevel \#0 $args
        }
        set {
            ## 'set' - set (or get, or unset) simple vars (not whole arrays)
            ## from the master console interpreter
            ## possible formats:
            ##    tkcon set <var>
            ##    tkcon set <var> <value>
            ##    tkcon set <var> <interp> <var1> <var2> w
            ##    tkcon set <var> <interp> <var1> <var2> u
            ##    tkcon set <var> <interp> <var1> <var2> r
            if {[llength $args]==5} {
                ## This is for use w/ 'tkcon upvar' and only works with slaves
                foreach {var i var1 var2 op} $args break
                if {[string compare {} $var2]} { append var1 "($var2)" }
                switch $op {
                    u { uplevel \#0 [list unset $var] }
                    w {
                        return [uplevel \#0 [list set $var \
                                [interp eval $i [list set $var1]]]]
                    }
                    r {
                        return [interp eval $i [list set $var1 \
                                [uplevel \#0 [list set $var]]]]
                    }
                }
            } elseif {[llength $args] == 1} {
                upvar \#0 [lindex $args 0] var
                if {[array exists var]} {
                    return [array get var]
                } else {
                    return $var
                }
            }
            return [uplevel \#0 set $args]
        }
        append {
            ## Modify a var in the master environment using append
            return [uplevel \#0 append $args]
        }
        lappend {
            ## Modify a var in the master environment using lappend
            return [uplevel \#0 lappend $args]
        }
        sh* - dei* {
            ## 'show|deiconify' - deiconifies the console.
            wm deiconify $::tkcon::PRIV(root)
            raise $::tkcon::PRIV(root)
            focus -force $::tkcon::PRIV(console)
        }
        ti* {
            ## 'title' ?title? - gets/sets the console's title
            if {[llength $args]} {
                return [wm title $::tkcon::PRIV(root) [join $args]]
            } else {
                return [wm title $::tkcon::PRIV(root)]
            }
        }
        upv* {
            ## 'upvar' masterVar slaveVar
            ## link slave variable slaveVar to the master variable masterVar
            ## only works masters<->slave
            set masterVar [lindex $args 0]
            set slaveVar  [lindex $args 1]
            if {[info exists $masterVar]} {
                interp eval $::tkcon::OPT(exec) \
                        [list set $slaveVar [set $masterVar]]
            } else {
                catch {interp eval $::tkcon::OPT(exec) [list unset $slaveVar]}
            }
            interp eval $::tkcon::OPT(exec) \
                    [list trace variable $slaveVar rwu \
                    [list tkcon set $masterVar $::tkcon::OPT(exec)]]
            return
        }
        v* {
            return $::tkcon::PRIV(version)
        }
        default {
            ## tries to determine if the command exists, otherwise throws error
            set new ::tkcon::[string toupper \
                    [string index $cmd 0]][string range $cmd 1 end]
            if {[llength [info command $new]]} {
                uplevel \#0 $new $args
            } else {
                return -code error "bad option \"$cmd\": must be\
                        [join [lsort [list attach close console destroy \
                        font hide iconify load main master new save show \
                        slave deiconify version title bgerror]] {, }]"
            }
        }
    }
}

##
## Some procedures to make up for lack of built-in shell commands
##

## tkcon_puts -
## This allows me to capture all stdout/stderr to the console window
## This will be renamed to 'puts' at the appropriate time during init
##
# ARGS: same as usual   
# Outputs:      the string with a color-coded text tag
## 
proc tkcon_puts args {
    set len [llength $args]
    foreach {arg1 arg2 arg3} $args { break }

    if {$len == 1} {
        set sarg $arg1
        set nl   1
        set farg stdout
    } elseif {$len == 2} {
        if {![string compare $arg1 -nonewline]} {
            set sarg $arg2
            set farg stdout
            set nl 0
        } elseif {![string compare $arg1 stdout] \
                || ![string compare $arg1 stderr]} {
            set sarg $arg2
            set farg $arg1
            set nl 1
        } else {
            set len 0
        }
    } elseif {$len == 3} {
        if {![string compare $arg1 -nonewline] \
                && (![string compare $arg2 stdout] \
                || ![string compare $arg2 stderr])} {
            set sarg $arg3
            set farg $arg2
            set nl 0
        } elseif {(![string compare $arg1 stdout] \
                || ![string compare $arg1 stderr]) \
                && ![string compare $arg3 nonewline]} {
            set sarg $arg2
            set farg $arg1
            set nl 0
        } else {
            set len 0
        }
    } else {
        set len 0
    }

    ## $len == 0 means it wasn't handled by tkcon above.
    ##

    if {$len != 0} {

        ## "poor man's" \r substitution---erase everything on the output
        ## line and print from character after the \r

        set rpt [string last \r $sarg]
        if {$rpt >= 0} {
            tkcon console delete "insert linestart" "insert lineend"
            set sarg [string range $sarg [expr {$rpt + 1}] end]
        }

        set bpt [string first \b $sarg]
        if {$bpt >= 0} {
            set narg [string range $sarg [expr {$bpt + 1}] end]
            set sarg [string range $sarg 0 [expr {$bpt - 1}]]
            set nl 0
        }
            

        if {$nl == 0} {
            tkcon console insert output $sarg $farg
        } else {
            tkcon console insert output "$sarg\n" $farg
        }

        if {$bpt >= 0} {
            tkcon console delete "insert -1 char" insert
            if {$nl == 0} {
                tkcon_puts $farg $narg nonewline
            } else {
                tkcon_puts $farg $narg
            }
        }

    } else {
        global errorCode errorInfo
        if {[catch "tkcon_tcl_puts $args" msg]} {
            regsub tkcon_tcl_puts $msg puts msg
            regsub -all tkcon_tcl_puts $errorInfo puts errorInfo
            return -code error $msg
        }
        return $msg
    }

    ## WARNING: This update should behave well because it uses idletasks,
    ## however, if there are weird looping problems with events, or
    ## hanging in waits, try commenting this out.
    if {$len} {
        tkcon console see output
        update idletasks
    }
}

## tkcon_gets -
## This allows me to capture all stdin input without needing to stdin
## This will be renamed to 'gets' at the appropriate time during init
##
# ARGS:         same as gets    
# Outputs:      same as gets
##
proc tkcon_gets args {
    set len [llength $args]
    if {$len != 1 && $len != 2} {
        return -code error \
                "wrong # args: should be \"gets channelId ?varName?\""
    }
    if {[string compare stdin [lindex $args 0]]} {
        return [uplevel 1 tkcon_tcl_gets $args]
    }
    set gtype [tkcon set ::tkcon::OPT(gets)]
    if {$gtype == ""} { set gtype congets }
    set data [tkcon $gtype]
    if {$len == 2} {
        upvar 1 [lindex $args 1] var
        set var $data
        return [string length $data]
    }
    return $data
}

## edit - opens a file/proc/var for reading/editing
## 
# Arguments:
#   type        proc/file/var
#   what        the actual name of the item
# Returns:      nothing
## 
proc edit {args} {
    array set opts {-find {} -type {} -attach {}}
    while {[string match -* [lindex $args 0]]} {
        switch -glob -- [lindex $args 0] {
            -f* { set opts(-find) [lindex $args 1] }
            -a* { set opts(-attach) [lindex $args 1] }
            -t* { set opts(-type) [lindex $args 1] }
            --  { set args [lreplace $args 0 0]; break }
            default {return -code error "unknown option \"[lindex $args 0]\""}
        }
        set args [lreplace $args 0 1]
    }
    # determine who we are dealing with
    if {[llength $opts(-attach)]} {
        foreach {app type} $opts(-attach) {break}
    } else {
        foreach {app type} [tkcon attach] {break}
    }

    set word [lindex $args 0]
    if {[string match {} $opts(-type)]} {
        if {[llength [::tkcon::EvalOther $app $type info commands [list $word]]]} {
            set opts(-type) "proc"
        } elseif {[llength [::tkcon::EvalOther $app $type info vars [list $word]]]} {
            set opts(-type) "var"
        } elseif {[::tkcon::EvalOther $app $type file isfile [list $word]]} {
            set opts(-type) "file"
        }
    }
    if {[string compare $opts(-type) {}]} {
        # Create unique edit window toplevel
        set w $::tkcon::PRIV(base).__edit
        set i 0
        while {[winfo exists $w[incr i]]} {}
        append w $i
        toplevel $w
        wm withdraw $w
        if {[string length $word] > 12} {
            wm title $w "tkcon Edit: [string range $word 0 9]..."
        } else {
            wm title $w "tkcon Edit: $word"
        }

        text $w.text -wrap none \
                -xscrollcommand [list $w.sx set] \
                -yscrollcommand [list $w.sy set] \
                -foreground $::tkcon::COLOR(stdin) \
                -background $::tkcon::COLOR(bg) \
                -insertbackground $::tkcon::COLOR(cursor) \
                -font $::tkcon::OPT(font)
        scrollbar $w.sx -orient h -takefocus 0 -bd 1 \
                -command [list $w.text xview]
        scrollbar $w.sy -orient v -takefocus 0 -bd 1 \
                -command [list $w.text yview]

        set menu [menu $w.mbar]
        $w configure -menu $menu

        ## File Menu
        ##
        set m [menu [::tkcon::MenuButton $menu File file]]
        $m add command -label "Save As..."  -underline 0 \
                -command [list ::tkcon::Save {} widget $w.text]
        $m add command -label "Append To..."  -underline 0 \
                -command [list ::tkcon::Save {} widget $w.text a+]
        $m add separator
        $m add command -label "Dismiss" -underline 0 -accel "Ctrl-w" \
                -command [list destroy $w]
        bind $w <Control-w>                     [list destroy $w]
        bind $w <$::tkcon::PRIV(meta)-w>        [list destroy $w]

        ## Edit Menu
        ##
        set text $w.text
        set m [menu [::tkcon::MenuButton $menu Edit edit]]
        $m add command -label "Cut"   -underline 2 \
                -command [list tk_textCut $text]
        $m add command -label "Copy"  -underline 0 \
                -command [list tk_textCopy $text]
        $m add command -label "Paste" -underline 0 \
                -command [list tk_textPaste $text]
        $m add separator
        $m add command -label "Find" -underline 0 \
                -command [list ::tkcon::FindBox $text]

        ## Send To Menu
        ##
        set m [menu [::tkcon::MenuButton $menu "Send To..." send]]
        $m add command -label "Send To $app" -underline 0 \
                -command "::tkcon::EvalOther [list $app] $type \
                eval \[$w.text get 1.0 end-1c\]"
        set other [tkcon attach]
        if {[string compare $other [list $app $type]]} {
            $m add command -label "Send To [lindex $other 0]" \
                    -command "::tkcon::EvalOther $other \
                    eval \[$w.text get 1.0 end-1c\]"
        }

        grid $w.text - $w.sy -sticky news
        grid $w.sx - -sticky ew
        grid columnconfigure $w 0 -weight 1
        grid columnconfigure $w 1 -weight 1
        grid rowconfigure $w 0 -weight 1
    } else {
        return -code error "unrecognized type '$word'"
    }
    switch -glob -- $opts(-type) {
        proc*   {
            $w.text insert 1.0 \
                    [::tkcon::EvalOther $app $type dump proc [list $word]]
        }
        var*    {
            $w.text insert 1.0 \
                    [::tkcon::EvalOther $app $type dump var [list $word]]
        }
        file    {
            $w.text insert 1.0 [::tkcon::EvalOther $app $type eval \
                    [subst -nocommands {
                set __tkcon(fid) [open $word r]
                set __tkcon(data) [read \$__tkcon(fid)]
                close \$__tkcon(fid)
                after 1000 unset __tkcon
                return \$__tkcon(data)
            }
            ]]
        }
        error*  {
            $w.text insert 1.0 [join $args \n]
            ::tkcon::ErrorHighlight $w.text
        }
        default {
            $w.text insert 1.0 [join $args \n]
        }
    }
    wm deiconify $w
    focus $w.text
    if {[string compare $opts(-find) {}]} {
        ::tkcon::Find $w.text $opts(-find) -case 1
    }
}
interp alias {} ::more {} ::edit
interp alias {} ::less {} ::edit

## echo
## Relaxes the one string restriction of 'puts'
# ARGS: any number of strings to output to stdout
##
proc echo args { puts [concat $args] }

## clear - clears the buffer of the console (not the history though)
## This is executed in the parent interpreter
## 
proc clear {{pcnt 100}} {
    if {![regexp {^[0-9]*$} $pcnt] || $pcnt < 1 || $pcnt > 100} {
        return -code error \
                "invalid percentage to clear: must be 1-100 (100 default)"
    } elseif {$pcnt == 100} {
        tkcon console delete 1.0 end
    } else {
        set tmp [expr {$pcnt/100.0*[tkcon console index end]}]
        tkcon console delete 1.0 "$tmp linestart"
    }
}

## alias - akin to the csh alias command
## If called with no args, then it dumps out all current aliases
## If called with one arg, returns the alias of that arg (or {} if none)
# ARGS: newcmd  - (optional) command to bind alias to
#       args    - command and args being aliased
## 
proc alias {{newcmd {}} args} {
    if {[string match {} $newcmd]} {
        set res {}
        foreach a [interp aliases] {
            lappend res [list $a -> [interp alias {} $a]]
        }
        return [join $res \n]
    } elseif {![llength $args]} {
        interp alias {} $newcmd
    } else {
        eval interp alias [list {} $newcmd {}] $args
    }
}

## unalias - unaliases an alias'ed command
# ARGS: cmd     - command to unbind as an alias
## 
proc unalias {cmd} {
    interp alias {} $cmd {}
}

## dump - outputs variables/procedure/widget info in source'able form.
## Accepts glob style pattern matching for the names
#
# ARGS: type    - type of thing to dump: must be variable, procedure, widget
#
# OPTS: -nocomplain
#               don't complain if no items of the specified type are found
#       -filter pattern
#               specifies a glob filter pattern to be used by the variable
#               method as an array filter pattern (it filters down for
#               nested elements) and in the widget method as a config
#               option filter pattern
#       --      forcibly ends options recognition
#
# Returns:      the values of the requested items in a 'source'able form
## 
proc dump {type args} {
    set whine 1
    set code  ok
    if {![llength $args]} {
        ## If no args, assume they gave us something to dump and
        ## we'll try anything
        set args $type
        set type any
    }
    while {[string match -* [lindex $args 0]]} {
        switch -glob -- [lindex $args 0] {
            -n* { set whine 0; set args [lreplace $args 0 0] }
            -f* { set fltr [lindex $args 1]; set args [lreplace $args 0 1] }
            --  { set args [lreplace $args 0 0]; break }
            default {return -code error "unknown option \"[lindex $args 0]\""}
        }
    }
    if {$whine && ![llength $args]} {
        return -code error "wrong \# args: [lindex [info level 0] 0] type\
                ?-nocomplain? ?-filter pattern? ?--? pattern ?pattern ...?"
    }
    set res {}
    switch -glob -- $type {
        c* {
            # command
            # outputs commands by figuring out, as well as possible, what it is
            # this does not attempt to auto-load anything
            foreach arg $args {
                if {[llength [set cmds [info commands $arg]]]} {
                    foreach cmd [lsort $cmds] {
                        if {[lsearch -exact [interp aliases] $cmd] > -1} {
                            append res "\#\# ALIAS:   $cmd =>\
                                    [interp alias {} $cmd]\n"
                        } elseif {
                            [llength [info procs $cmd]] ||
                            ([string match *::* $cmd] &&
                            [llength [namespace eval [namespace qual $cmd] \
                                    info procs [namespace tail $cmd]]])
                        } {
                            if {[catch {dump p -- $cmd} msg] && $whine} {
                                set code error
                            }
                            append res $msg\n
                        } else {
                            append res "\#\# COMMAND: $cmd\n"
                        }
                    }
                } elseif {$whine} {
                    append res "\#\# No known command $arg\n"
                    set code error
                }
            }
        }
        v* {
            # variable
            # outputs variables value(s), whether array or simple.
            if {![info exists fltr]} { set fltr * }
            foreach arg $args {
                if {![llength [set vars [uplevel 1 info vars [list $arg]]]]} {
                    if {[uplevel 1 info exists $arg]} {
                        set vars $arg
                    } elseif {$whine} {
                        append res "\#\# No known variable $arg\n"
                        set code error
                        continue
                    } else { continue }
                }
                foreach var [lsort $vars] {
                    if {[uplevel 1 [list info locals $var]] == ""} {
                        # use the proper scope of the var, but
                        # namespace which won't id locals correctly
                        set var [uplevel 1 \
                                [list namespace which -variable $var]]
                    }
                    upvar 1 $var v
                    if {[array exists v] || [catch {string length $v}]} {
                        set nst {}
                        append res "array set [list $var] \{\n"
                        if {[array size v]} {
                            foreach i [lsort [array names v $fltr]] {
                                upvar 0 v\($i\) __a
                                if {[array exists __a]} {
                                    append nst "\#\# NESTED ARRAY ELEM: $i\n"
                                    append nst "upvar 0 [list $var\($i\)] __a;\
                                            [dump v -filter $fltr __a]\n"
                                } else {
                                    append res "    [list $i]\t[list $v($i)]\n"
                                }
                            }
                        } else {
                            ## empty array
                            append res "    empty array\n"
                            append nst "unset [list $var](empty)\n"
                        }
                        append res "\}\n$nst"
                    } else {
                        append res [list set $var $v]\n
                    }
                }
            }
        }
        p* {
            # procedure
            foreach arg $args {
                if {
                    ![llength [set procs [info proc $arg]]] &&
                    ([string match *::* $arg] &&
                    [llength [set ps [namespace eval \
                            [namespace qualifier $arg] \
                            info procs [namespace tail $arg]]]])
                } {
                    set procs {}
                    set namesp [namespace qualifier $arg]
                    foreach p $ps {
                        lappend procs ${namesp}::$p
                    }
                }
                if {[llength $procs]} {
                    foreach p [lsort $procs] {
                        set as {}
                        foreach a [info args $p] {
                            if {[info default $p $a tmp]} {
                                lappend as [list $a $tmp]
                            } else {
                                lappend as $a
                            }
                        }
                        append res [list proc $p $as [info body $p]]\n
                    }
                } elseif {$whine} {
                    append res "\#\# No known proc $arg\n"
                    set code error
                }
            }
        }
        w* {
            # widget
            ## The user should have Tk loaded
            if {![llength [info command winfo]]} {
                return -code error "winfo not present, cannot dump widgets"
            }
            if {![info exists fltr]} { set fltr .* }
            foreach arg $args {
                if {[llength [set ws [info command $arg]]]} {
                    foreach w [lsort $ws] {
                        if {[winfo exists $w]} {
                            if {[catch {$w configure} cfg]} {
                                append res "\#\# Widget $w\
                                        does not support configure method"
                                set code error
                            } else {
                                append res "\#\# [winfo class $w]\
                                        $w\n$w configure"
                                foreach c $cfg {
                                    if {[llength $c] != 5} continue
                                    ## Check to see that the option does
                                    ## not match the default, then check
                                    ## the item against the user filter
                                    if {[string compare [lindex $c 3] \
                                            [lindex $c 4]] && \
                                            [regexp -nocase -- $fltr $c]} {
                                        append res " \\\n\t[list [lindex $c 0]\
                                                [lindex $c 4]]"
                                    }
                                }
                                append res \n
                            }
                        }
                    }
                } elseif {$whine} {
                    append res "\#\# No known widget $arg\n"
                    set code error
                }
            }
        }
        a* {
            ## see if we recognize it, other complain
            if {[regexp {(var|com|proc|widget)} \
                    [set types [uplevel 1 what $args]]]} {
                foreach type $types {
                    if {[regexp {(var|com|proc|widget)} $type]} {
                        append res "[uplevel 1 dump $type $args]\n"
                    }
                }
            } else {
                set res "dump was unable to resolve type for \"$args\""
                set code error
            }
        }
        default {
            return -code error "bad [lindex [info level 0] 0] option\
                    \"$type\": must be variable, command, procedure,\
                    or widget"
        }
    }
    return -code $code [string trimright $res \n]
}

## idebug - interactive debugger
#
# idebug body ?level?
#
#       Prints out the body of the command (if it is a procedure) at the
#       specified level.  <i>level</i> defaults to the current level.
#
# idebug break
#
#       Creates a breakpoint within a procedure.  This will only trigger
#       if idebug is on and the id matches the pattern.  If so, TkCon will
#       pop to the front with the prompt changed to an idebug prompt.  You
#       are given the basic ability to observe the call stack an query/set
#       variables or execute Tcl commands at any level.  A separate history
#       is maintained in debugging mode.
#
# idebug echo|{echo ?id?} ?args?
#
#       Behaves just like "echo", but only triggers when idebug is on.
#       You can specify an optional id to further restrict triggering.
#       If no id is specified, it defaults to the name of the command
#       in which the call was made.
#
# idebug id ?id?
#
#       Query or set the idebug id.  This id is used by other idebug
#       methods to determine if they should trigger or not.  The idebug
#       id can be a glob pattern and defaults to *.
#
# idebug off
#
#       Turns idebug off.
#
# idebug on ?id?
#
#       Turns idebug on.  If 'id' is specified, it sets the id to it.
#
# idebug puts|{puts ?id?} args
#
#       Behaves just like "puts", but only triggers when idebug is on.
#       You can specify an optional id to further restrict triggering.
#       If no id is specified, it defaults to the name of the command
#       in which the call was made.
#
# idebug show type ?level? ?VERBOSE?
#
#       'type' must be one of vars, locals or globals.  This method
#       will output the variables/locals/globals present in a particular
#       level.  If VERBOSE is added, then it actually 'dump's out the
#       values as well.  'level' defaults to the level in which this
#       method was called.
#
# idebug trace ?level?
#
#       Prints out the stack trace from the specified level up to the top
#       level.  'level' defaults to the current level.
#
##
proc idebug {opt args} {
    global IDEBUG

    if {![info exists IDEBUG(on)]} {
        array set IDEBUG { on 0 id * debugging 0 }
    }
    set level [expr {[info level]-1}]
    switch -glob -- $opt {
        on      {
            if {[llength $args]} { set IDEBUG(id) $args }
            return [set IDEBUG(on) 1]
        }
        off     { return [set IDEBUG(on) 0] }
        id  {
            if {![llength $args]} {
                return $IDEBUG(id)
            } else { return [set IDEBUG(id) $args] }
        }
        break {
            if {!$IDEBUG(on) || $IDEBUG(debugging) || \
                    ([llength $args] && \
                    ![string match $IDEBUG(id) $args]) || [info level]<1} {
                return
            }
            set IDEBUG(debugging) 1
            puts stderr "idebug at level \#$level: [lindex [info level -1] 0]"
            set tkcon [llength [info command tkcon]]
            if {$tkcon} {
                tkcon master eval set ::tkcon::OPT(prompt2) \$::tkcon::OPT(prompt1)
                tkcon master eval set ::tkcon::OPT(prompt1) \$::tkcon::OPT(debugPrompt)
                set slave [tkcon set ::tkcon::OPT(exec)]
                set event [tkcon set ::tkcon::PRIV(event)]
                tkcon set ::tkcon::OPT(exec) [tkcon master interp create debugger]
                tkcon set ::tkcon::PRIV(event) 1
            }
            set max $level
            while 1 {
                set err {}
                if {$tkcon} {
                    # tkcon's overload of gets is advanced enough to not need
                    # this, but we get a little better control this way.
                    tkcon evalSlave set level $level
                    tkcon prompt
                    set line [tkcon getcommand]
                    tkcon console mark set output end
                } else {
                    puts -nonewline stderr "(level \#$level) debug > "
                    gets stdin line
                    while {![info complete $line]} {
                        puts -nonewline "> "
                        append line "\n[gets stdin]"
                    }
                }
                if {[string match {} $line]} continue
                set key [lindex $line 0]
                if {![regexp {^([#-]?[0-9]+)} [lreplace $line 0 0] lvl]} {
                    set lvl \#$level
                }
                set res {}; set c 0
                switch -- $key {
                    + {
                        ## Allow for jumping multiple levels
                        if {$level < $max} {
                            idebug trace [incr level] $level 0 VERBOSE
                        }
                    }
                    - {
                        ## Allow for jumping multiple levels
                        if {$level > 1} {
                            idebug trace [incr level -1] $level 0 VERBOSE
                        }
                    }
                    . { set c [catch {idebug trace $level $level 0 VERBOSE} res] }
                    v { set c [catch {idebug show vars $lvl } res] }
                    V { set c [catch {idebug show vars $lvl VERBOSE} res] }
                    l { set c [catch {idebug show locals $lvl } res] }
                    L { set c [catch {idebug show locals $lvl VERBOSE} res] }
                    g { set c [catch {idebug show globals $lvl } res] }
                    G { set c [catch {idebug show globals $lvl VERBOSE} res] }
                    t { set c [catch {idebug trace 1 $max $level } res] }
                    T { set c [catch {idebug trace 1 $max $level VERBOSE} res]}
                    b { set c [catch {idebug body $lvl} res] }
                    o { set res [set IDEBUG(on) [expr {!$IDEBUG(on)}]] }
                    h - ?       {
                        puts stderr "    +              Move down in call stack
    -           Move up in call stack
    .           Show current proc name and params

    v           Show names of variables currently in scope
    V           Show names of variables currently in scope with values
    l           Show names of local (transient) variables
    L           Show names of local (transient) variables with values
    g           Show names of declared global variables
    G           Show names of declared global variables with values
    t           Show a stack trace
    T           Show a verbose stack trace

    b           Show body of current proc
    o           Toggle on/off any further debugging
    c,q         Continue regular execution (Quit debugger)
    h,?         Print this help
    default     Evaluate line at current level (\#$level)"
                    }
                    c - q break
                    default { set c [catch {uplevel \#$level $line} res] }
                }
                if {$tkcon} {
                    tkcon set ::tkcon::PRIV(event) \
                            [tkcon evalSlave eval history add [list $line]\
                            \; history nextid]
                }
                if {$c} {
                    puts stderr $res
                } elseif {[string compare {} $res]} {
                    puts $res
                }
            }
            set IDEBUG(debugging) 0
            if {$tkcon} {
                tkcon master interp delete debugger
                tkcon master eval set ::tkcon::OPT(prompt1) \$::tkcon::OPT(prompt2)
                tkcon set ::tkcon::OPT(exec) $slave
                tkcon set ::tkcon::PRIV(event) $event
                tkcon prompt
            }
        }
        bo* {
            if {[regexp {^([#-]?[0-9]+)} $args level]} {
                return [uplevel $level {dump c -no [lindex [info level 0] 0]}]
            }
        }
        t* {
            if {[llength $args]<2} return
            set min [set max [set lvl $level]]
            set exp {^#?([0-9]+)? ?#?([0-9]+) ?#?([0-9]+)? ?(VERBOSE)?}
            if {![regexp $exp $args junk min max lvl verbose]} return
            for {set i $max} {
                $i>=$min && ![catch {uplevel \#$i info level 0} info]
            } {incr i -1} {
                if {$i==$lvl} {
                    puts -nonewline stderr "* \#$i:\t"
                } else {
                    puts -nonewline stderr "  \#$i:\t"
                }
                set name [lindex $info 0]
                if {[string compare VERBOSE $verbose] || \
                        ![llength [info procs $name]]} {
                    puts $info
                } else {
                    puts "proc $name {[info args $name]} { ... }"
                    set idx 0
                    foreach arg [info args $name] {
                        if {[string match args $arg]} {
                            puts "\t$arg = [lrange $info [incr idx] end]"
                            break
                        } else {
                            puts "\t$arg = [lindex $info [incr idx]]"
                        }
                    }
                }
            }
        }
        s* {
            #var, local, global
            set level \#$level
            if {![regexp {^([vgl][^ ]*) ?([#-]?[0-9]+)? ?(VERBOSE)?} \
                    $args junk type level verbose]} return
            switch -glob -- $type {
                v* { set vars [uplevel $level {lsort [info vars]}] }
                l* { set vars [uplevel $level {lsort [info locals]}] }
                g* { set vars [lremove [uplevel $level {info vars}] \
                        [uplevel $level {info locals}]] }
            }
            if {[string match VERBOSE $verbose]} {
                return [uplevel $level dump var -nocomplain $vars]
            } else {
                return $vars
            }
        }
        e* - pu* {
            if {[llength $opt]==1 && [catch {lindex [info level -1] 0} id]} {
                set id [lindex [info level 0] 0]
            } else {
                set id [lindex $opt 1]
            }
            if {$IDEBUG(on) && [string match $IDEBUG(id) $id]} {
                if {[string match e* $opt]} {
                    puts [concat $args]
                } else { eval puts $args }
            }
        }
        default {
            return -code error "bad [lindex [info level 0] 0] option \"$opt\",\
                    must be: [join [lsort [list on off id break print body\
                    trace show puts echo]] {, }]"
        }
    }
}

## observe - like trace, but not
# ARGS: opt     - option
#       name    - name of variable or command
##
proc observe {opt name args} {
    global tcl_observe
    switch -glob -- $opt {
        co* {
            if {[regexp {^(catch|lreplace|set|puts|for|incr|info|uplevel)$} \
                    $name]} {
                return -code error "cannot observe \"$name\":\
                        infinite eval loop will occur"
            }
            set old ${name}@
            while {[llength [info command $old]]} { append old @ }
            rename $name $old
            set max 4
            regexp {^[0-9]+} $args max
            ## idebug trace could be used here
            proc $name args "
            for {set i \[info level\]; set max \[expr \[info level\]-$max\]} {
                \$i>=\$max && !\[catch {uplevel \#\$i info level 0} info\]
            } {incr i -1} {
                puts -nonewline stderr \"  \#\$i:\t\"
                puts \$info
            }
            uplevel \[lreplace \[info level 0\] 0 0 $old\]
            "
            set tcl_observe($name) $old
        }
        cd* {
            if {[info exists tcl_observe($name)] && [catch {
                rename $name {}
                rename $tcl_observe($name) $name
                unset tcl_observe($name)
            } err]} { return -code error $err }
        }
        ci* {
            ## What a useless method...
            if {[info exists tcl_observe($name)]} {
                set i $tcl_observe($name)
                set res "\"$name\" observes true command \"$i\""
                while {[info exists tcl_observe($i)]} {
                    append res "\n\"$name\" observes true command \"$i\""
                    set i $tcl_observe($name)
                }
                return $res
            }
        }
        va* - vd* {
            set type [lindex $args 0]
            set args [lrange $args 1 end]
            if {![regexp {^[rwu]} $type type]} {
                return -code error "bad [lindex [info level 0] 0] $opt type\
                        \"$type\", must be: read, write or unset"
            }
            if {![llength $args]} { set args observe_var }
            uplevel 1 [list trace $opt $name $type $args]
        }
        vi* {
            uplevel 1 [list trace vinfo $name]
        }
        default {
            return -code error "bad [lindex [info level 0] 0] option\
                    \"[lindex $args 0]\", must be: [join [lsort \
                    [list command cdelete cinfo variable vdelete vinfo]] {, }]"
        }
    }
}

## observe_var - auxilary function for observing vars, called by trace
## via observe
# ARGS: name    - variable name
#       el      - array element name, if any
#       op      - operation type (rwu)
##
proc observe_var {name el op} {
    if {[string match u $op]} {
        if {[string compare {} $el]} {
            puts "unset \"${name}($el)\""
        } else {
            puts "unset \"$name\""
        }
    } else {
        upvar 1 $name $name
        if {[info exists ${name}($el)]} {
            puts [dump v ${name}($el)]
        } else {
            puts [dump v $name]
        }
    }
}

## which - tells you where a command is found
# ARGS: cmd     - command name
# Returns:      where command is found (internal / external / unknown)
## 
proc which cmd {
    ## This tries to auto-load a command if not recognized
    set types [uplevel 1 [list what $cmd 1]]
    if {[llength $types]} {
        set out {}
        
        foreach type $types {
            switch -- $type {
                alias           { set res "$cmd: aliased to [alias $cmd]" }
                procedure       { set res "$cmd: procedure" }
                command         { set res "$cmd: internal command" }
                executable      { lappend out [auto_execok $cmd] }
                variable        { lappend out "$cmd: $type" }
            }
            if {[info exists res]} {
                global auto_index
                if {[info exists auto_index($cmd)]} {
                    ## This tells you where the command MIGHT have come from -
                    ## not true if the command was redefined interactively or
                    ## existed before it had to be auto_loaded.  This is just
                    ## provided as a hint at where it MAY have come from
                    append res " ($auto_index($cmd))"
                }
                lappend out $res
                unset res
            }
        }
        return [join $out \n]
    } else {
        return -code error "$cmd: command not found"
    }
}

## what - tells you what a string is recognized as
# ARGS: str     - string to id
# Returns:      id types of command as list
## 
proc what {str {autoload 0}} {
    set types {}
    if {[llength [info commands $str]] || ($autoload && \
            [auto_load $str] && [llength [info commands $str]])} {
        if {[lsearch -exact [interp aliases] $str] > -1} {
            lappend types "alias"
        } elseif {
            [llength [info procs $str]] ||
            ([string match *::* $str] &&
            [llength [namespace eval [namespace qualifier $str] \
                    info procs [namespace tail $str]]])
        } {
            lappend types "procedure"
        } else {
            lappend types "command"
        }
    }
    if {[llength [uplevel 1 info vars $str]]} {
        upvar 1 $str var
        if {[array exists var]} {
            lappend types array variable
        } else {
            lappend types scalar variable
        }
    }
    if {[file isdirectory $str]} {
        lappend types "directory"
    }
    if {[file isfile $str]} {
        lappend types "file"
    }
    if {[llength [info commands winfo]] && [winfo exists $str]} {
        lappend types "widget"
    }
    if {[string compare {} [auto_execok $str]]} {
        lappend types "executable"
    }
    return $types
}

## dir - directory list
# ARGS: args    - names/glob patterns of directories to list
# OPTS: -all    - list hidden files as well (Unix dot files)
#       -long   - list in full format "permissions size date filename"
#       -full   - displays / after directories and link paths for links
# Returns:      a directory listing
## 
proc dir {args} {
    array set s {
        all 0 full 0 long 0
        0 --- 1 --x 2 -w- 3 -wx 4 r-- 5 r-x 6 rw- 7 rwx
    }
    while {[string match \-* [lindex $args 0]]} {
        set str [lindex $args 0]
        set args [lreplace $args 0 0]
        switch -glob -- $str {
            -a* {set s(all) 1} -f* {set s(full) 1}
            -l* {set s(long) 1} -- break
            default {
                return -code error "unknown option \"$str\",\
                        should be one of: -all, -full, -long"
            }
        }
    }
    set sep [string trim [file join . .] .]
    if {![llength $args]} { set args . }
    if {$::tcl_version >= 8.3} {
        # Newer glob args allow safer dir processing.  The user may still
        # want glob chars, but really only for file matching.
        foreach arg $args {
            if {[file isdirectory $arg]} {
                if {$s(all)} {
                    lappend out [list $arg [lsort \
                            [glob -nocomplain -directory $arg .* *]]]
                } else {
                    lappend out [list $arg [lsort \
                            [glob -nocomplain -directory $arg *]]]
                }
            } else {
                set dir [file dirname $arg]
                lappend out [list $dir$sep [lsort \
                        [glob -nocomplain -directory $dir [file tail $arg]]]]
            }
        }
    } else {
        foreach arg $args {
            if {[file isdirectory $arg]} {
                set arg [string trimright $arg $sep]$sep
                if {$s(all)} {
                    lappend out [list $arg [lsort [glob -nocomplain -- $arg.* $arg*]]]
                } else {
                    lappend out [list $arg [lsort [glob -nocomplain -- $arg*]]]
                }
            } else {
                lappend out [list [file dirname $arg]$sep \
                        [lsort [glob -nocomplain -- $arg]]]
            }
        }
    }
    if {$s(long)} {
        set old [clock scan {1 year ago}]
        set fmt "%s%9d %s %s\n"
        foreach o $out {
            set d [lindex $o 0]
            append res $d:\n
            foreach f [lindex $o 1] {
                file lstat $f st
                set f [file tail $f]
                if {$s(full)} {
                    switch -glob $st(type) {
                        d* { append f $sep }
                        l* { append f "@ -> [file readlink $d$sep$f]" }
                        default { if {[file exec $d$sep$f]} { append f * } }
                    }
                }
                if {[string match file $st(type)]} {
                    set mode -
                } else {
                    set mode [string index $st(type) 0]
                }
                foreach j [split [format %03o [expr {$st(mode)&0777}]] {}] {
                    append mode $s($j)
                }
                if {$st(mtime)>$old} {
                    set cfmt {%b %d %H:%M}
                } else {
                    set cfmt {%b %d  %Y}
                }
                append res [format $fmt $mode $st(size) \
                        [clock format $st(mtime) -format $cfmt] $f]
            }
            append res \n
        }
    } else {
        foreach o $out {
            set d [lindex $o 0]
            append res "$d:\n"
            set i 0
            foreach f [lindex $o 1] {
                if {[string len [file tail $f]] > $i} {
                    set i [string len [file tail $f]]
                }
            }
            set i [expr {$i+2+$s(full)}]
            set j 80
            ## This gets the number of cols in the tkcon console widget
            if {[llength [info commands tkcon]]} {
                set j [expr {[tkcon master set ::tkcon::OPT(cols)]/$i}]
            }
            set k 0
            foreach f [lindex $o 1] {
                set f [file tail $f]
                if {$s(full)} {
                    switch -glob [file type $d$sep$f] {
                        d* { append f $sep }
                        l* { append f @ }
                        default { if {[file exec $d$sep$f]} { append f * } }
                    }
                }
                append res [format "%-${i}s" $f]
                if {$j == 0 || [incr k]%$j == 0} {
                    set res [string trimright $res]\n
                }
            }
            append res \n\n
        }
    }
    return [string trimright $res]
}
interp alias {} ::ls {} ::dir -full

## lremove - remove items from a list
# OPTS:
#   -all        remove all instances of each item
#   -glob       remove all instances matching glob pattern
#   -regexp     remove all instances matching regexp pattern
# ARGS: l       a list to remove items from
#       args    items to remove (these are 'join'ed together)
##
proc lremove {args} {
    array set opts {-all 0 pattern -exact}
    while {[string match -* [lindex $args 0]]} {
        switch -glob -- [lindex $args 0] {
            -a* { set opts(-all) 1 }
            -g* { set opts(pattern) -glob }
            -r* { set opts(pattern) -regexp }
            --  { set args [lreplace $args 0 0]; break }
            default {return -code error "unknown option \"[lindex $args 0]\""}
        }
        set args [lreplace $args 0 0]
    }
    set l [lindex $args 0]
    foreach i [join [lreplace $args 0 0]] {
        if {[set ix [lsearch $opts(pattern) $l $i]] == -1} continue
        set l [lreplace $l $ix $ix]
        if {$opts(-all)} {
            while {[set ix [lsearch $opts(pattern) $l $i]] != -1} {
                set l [lreplace $l $ix $ix]
            }
        }
    }
    return $l
}

if {!$::tkcon::PRIV(WWW)} {;

## Unknown changed to get output into tkcon window
# unknown:
# Invoked automatically whenever an unknown command is encountered.
# Works through a list of "unknown handlers" that have been registered
# to deal with unknown commands.  Extensions can integrate their own
# handlers into the 'unknown' facility via 'unknown_handler'.
#
# If a handler exists that recognizes the command, then it will
# take care of the command action and return a valid result or a
# Tcl error.  Otherwise, it should return "-code continue" (=2)
# and responsibility for the command is passed to the next handler.
#
# Arguments:
# args -        A list whose elements are the words of the original
#               command, including the command name.

proc unknown args {
    global unknown_handler_order unknown_handlers errorInfo errorCode

    #
    # Be careful to save error info now, and restore it later
    # for each handler.  Some handlers generate their own errors
    # and disrupt handling.
    #
    set savedErrorCode $errorCode
    set savedErrorInfo $errorInfo

    if {![info exists unknown_handler_order] || \
            ![info exists unknown_handlers]} {
        set unknown_handlers(tcl) tcl_unknown
        set unknown_handler_order tcl
    }

    foreach handler $unknown_handler_order {
        set status [catch {uplevel 1 $unknown_handlers($handler) $args} result]

        if {$status == 1} {
            #
            # Strip the last five lines off the error stack (they're
            # from the "uplevel" command).
            #
            set new [split $errorInfo \n]
            set new [join [lrange $new 0 [expr {[llength $new]-6}]] \n]
            return -code $status -errorcode $errorCode \
                -errorinfo $new $result

        } elseif {$status != 4} {
            return -code $status $result
        }

        set errorCode $savedErrorCode
        set errorInfo $savedErrorInfo
    }

    set name [lindex $args 0]
    return -code error "invalid command name \"$name\""
}

# tcl_unknown:
# Invoked when a Tcl command is invoked that doesn't exist in the
# interpreter:
#
#       1. See if the autoload facility can locate the command in a
#          Tcl script file.  If so, load it and execute it.
#       2. If the command was invoked interactively at top-level:
#           (a) see if the command exists as an executable UNIX program.
#               If so, "exec" the command.
#           (b) see if the command requests csh-like history substitution
#               in one of the common forms !!, !<number>, or ^old^new.  If
#               so, emulate csh's history substitution.
#           (c) see if the command is a unique abbreviation for another
#               command.  If so, invoke the command.
#
# Arguments:
# args -        A list whose elements are the words of the original
#               command, including the command name.

proc tcl_unknown args {
    global auto_noexec auto_noload env unknown_pending tcl_interactive
    global errorCode errorInfo

    # If the command word has the form "namespace inscope ns cmd"
    # then concatenate its arguments onto the end and evaluate it.

    set cmd [lindex $args 0]
    if {[regexp "^namespace\[ \t\n\]+inscope" $cmd] && [llength $cmd] == 4} {
        set arglist [lrange $args 1 end]
        set ret [catch {uplevel 1 $cmd $arglist} result]
        if {$ret == 0} {
            return $result
        } else {
            return -code $ret -errorcode $errorCode $result
        }
    }

    # CAD tools special:
    # Check for commands which were renamed to tcl_(command)

    if {[lsearch [info commands] tcl_$cmd] >= 0} {
        set arglist [concat tcl_$cmd [lrange $args 1 end]]
        set ret [catch {eval $arglist} result]
        if {$ret == 0} {
            return $result
        } else {
            return -code $ret -errorcode $errorCode $result
        }
    }

    # Save the values of errorCode and errorInfo variables, since they
    # may get modified if caught errors occur below.  The variables will
    # be restored just before re-executing the missing command.

    set savedErrorCode $errorCode
    set savedErrorInfo $errorInfo
    set name [lindex $args 0]
    if {![info exists auto_noload]} {
        #
        # Make sure we're not trying to load the same proc twice.
        #
        if {[info exists unknown_pending($name)]} {
            return -code error "self-referential recursion in \"unknown\" for command \"$name\""
        }
        set unknown_pending($name) pending
        if {[llength [info args auto_load]]==1} {
            set ret [catch {auto_load $name} msg]
        } else {
            set ret [catch {auto_load $name [uplevel 1 {namespace current}]} msg]
        }
        unset unknown_pending($name)
        if {$ret} {
            return -code $ret -errorcode $errorCode \
                    "error while autoloading \"$name\": $msg"
        }
        #
        # Avoid problems with renaming "array"! (for tcl-based magic only)
        #
        set arraycmd array
        if {[lsearch [info commands] tcl_array] >= 0} {set arraycmd tcl_array}

        if {![$arraycmd size unknown_pending]} { unset unknown_pending }
        if {$msg} {
            set errorCode $savedErrorCode
            set errorInfo $savedErrorInfo
            set code [catch {uplevel 1 $args} msg]
            if {$code ==  1} {
                #
                # Strip the last five lines off the error stack (they're
                # from the "uplevel" command).
                #

                set new [split $errorInfo \n]
                set new [join [lrange $new 0 [expr {[llength $new]-6}]] \n]
                return -code error -errorcode $errorCode \
                        -errorinfo $new $msg
            } else {
                return -code $code $msg
            }
        }
    }
    if {[info level] == 1 && [string match {} [info script]] \
            && [info exists tcl_interactive] && $tcl_interactive} {
        if {![info exists auto_noexec]} {
            set new [auto_execok $name]
            if {[string compare {} $new]} {
                set errorCode $savedErrorCode
                set errorInfo $savedErrorInfo
                return [uplevel 1 exec $new [lrange $args 1 end]]
                #return [uplevel exec >&@stdout <@stdin $new [lrange $args 1 end]]
            }
        }
        set errorCode $savedErrorCode
        set errorInfo $savedErrorInfo
        ##
        ## History substitution moved into ::tkcon::EvalCmd
        ##
        set ret [catch {set cmds [info commands $name*]} msg]
        if {[string compare $name "::"] == 0} {
            set name ""
        }
        if {$ret != 0} {
            return -code $ret -errorcode $errorCode \
                "error in unknown while checking if \"$name\" is a unique command abbreviation: $msg"
        }
        set cmds [info commands $name*]
        if {[llength $cmds] == 1} {
            return [uplevel 1 [lreplace $args 0 0 $cmds]]
        }
        if {[llength $cmds]} {
            if {$name == ""} {
                return -code error "empty command name \"\""
            } else {
                return -code error \
                        "ambiguous command name \"$name\": [lsort $cmds]"
            }
        }
        ## We've got nothing so far
        ## Check and see if Tk wasn't loaded, but it appears to be a Tk cmd
        if {![uplevel \#0 info exists tk_version]} {
            lappend tkcmds bell bind bindtags button \
                    canvas checkbutton clipboard destroy \
                    entry event focus font frame grab grid image \
                    label listbox lower menu menubutton message \
                    option pack place radiobutton raise \
                    scale scrollbar selection send spinbox \
                    text tk tkwait toplevel winfo wm
            if {[lsearch -exact $tkcmds $name] >= 0 && \
                    [tkcon master tk_messageBox -icon question -parent . \
                    -title "Load Tk?" -type retrycancel -default retry \
                    -message "This appears to be a Tk command, but Tk\
                    has not yet been loaded.  Shall I retry the command\
                    with loading Tk first?"] == "retry"} {
                return [uplevel 1 "load {} Tk; $args"]
            }
        }
    }
    return -code continue
}

} ; # end exclusionary code for WWW

proc ::tkcon::Bindings {} {
    variable PRIV
    global tcl_platform tk_version

    #-----------------------------------------------------------------------
    # Elements of tkPriv that are used in this file:
    #
    # char -            Character position on the line;  kept in order
    #                   to allow moving up or down past short lines while
    #                   still remembering the desired position.
    # mouseMoved -      Non-zero means the mouse has moved a significant
    #                   amount since the button went down (so, for example,
    #                   start dragging out a selection).
    # prevPos -         Used when moving up or down lines via the keyboard.
    #                   Keeps track of the previous insert position, so
    #                   we can distinguish a series of ups and downs, all
    #                   in a row, from a new up or down.
    # selectMode -      The style of selection currently underway:
    #                   char, word, or line.
    # x, y -            Last known mouse coordinates for scanning
    #                   and auto-scanning.
    #-----------------------------------------------------------------------

    switch -glob $tcl_platform(platform) {
        win*    { set PRIV(meta) Alt }
        mac*    { set PRIV(meta) Command }
        default { set PRIV(meta) Meta }
    }

    ## Get all Text bindings into TkConsole
    foreach ev [bind Text] { bind TkConsole $ev [bind Text $ev] }       
    ## We really didn't want the newline insertion
    bind TkConsole <Control-Key-o> {}

    ## in 8.6b3, the virtual events <<NextLine>> and <<PrevLine>>
    #  mess up our history feature
    bind TkConsole <<NextLine>> {}
    bind TkConsole <<PrevLine>> {}

    ## Now make all our virtual event bindings
    foreach {ev key} [subst -nocommand -noback {
        <<TkCon_Exit>>          <Control-q>
        <<TkCon_New>>           <Control-N>
        <<TkCon_Close>>         <Control-w>
        <<TkCon_About>>         <Control-A>
        <<TkCon_Help>>          <Control-H>
        <<TkCon_Find>>          <Control-F>
        <<TkCon_Slave>>         <Control-Key-1>
        <<TkCon_Master>>        <Control-Key-2>
        <<TkCon_Main>>          <Control-Key-3>
        <<TkCon_Expand>>        <Key-Tab>
        <<TkCon_ExpandFile>>    <Key-Escape>
        <<TkCon_ExpandProc>>    <Control-P>
        <<TkCon_ExpandVar>>     <Control-V>
        <<TkCon_Tab>>           <Control-i>
        <<TkCon_Tab>>           <$PRIV(meta)-i>
        <<TkCon_Newline>>       <Control-o>
        <<TkCon_Newline>>       <$PRIV(meta)-o>
        <<TkCon_Newline>>       <Control-Key-Return>
        <<TkCon_Newline>>       <Control-Key-KP_Enter>
        <<TkCon_Eval>>          <Return>
        <<TkCon_Eval>>          <KP_Enter>
        <<TkCon_Clear>>         <Control-l>
        <<TkCon_Previous>>      <Up>
        <<TkCon_PreviousImmediate>>     <Control-p>
        <<TkCon_PreviousSearch>>        <Control-r>
        <<TkCon_Next>>          <Down>
        <<TkCon_NextImmediate>> <Control-n>
        <<TkCon_NextSearch>>    <Control-s>
        <<TkCon_Transpose>>     <Control-t>
        <<TkCon_ClearLine>>     <Control-u>
        <<TkCon_SaveCommand>>   <Control-z>
        <<TkCon_Popup>>         <Button-3>
    }] {
        event add $ev $key
        ## Make sure the specific key won't be defined
        bind TkConsole $key {}
    }

    ## Make the ROOT bindings
    bind $PRIV(root) <<TkCon_Exit>>     exit
    bind $PRIV(root) <<TkCon_New>>      { ::tkcon::New }
    bind $PRIV(root) <<TkCon_Close>>    { ::tkcon::Destroy }
    bind $PRIV(root) <<TkCon_About>>    { ::tkcon::About }
    bind $PRIV(root) <<TkCon_Help>>     { ::tkcon::Help }
    bind $PRIV(root) <<TkCon_Find>>     { ::tkcon::FindBox $::tkcon::PRIV(console) }
    bind $PRIV(root) <<TkCon_Slave>>    {
        ::tkcon::Attach {}
        ::tkcon::Prompt "\n" [::tkcon::CmdGet $::tkcon::PRIV(console)]
    }
    bind $PRIV(root) <<TkCon_Master>>   {
        if {[string compare {} $::tkcon::PRIV(name)]} {
            ::tkcon::Attach $::tkcon::PRIV(name)
        } else {
            ::tkcon::Attach Main
        }
        ::tkcon::Prompt "\n" [::tkcon::CmdGet $::tkcon::PRIV(console)]
    }
    bind $PRIV(root) <<TkCon_Main>>     {
        ::tkcon::Attach Main
        ::tkcon::Prompt "\n" [::tkcon::CmdGet $::tkcon::PRIV(console)]
    }
    bind $PRIV(root) <<TkCon_Popup>> {
        ::tkcon::PopupMenu %X %Y
    }

    ## Menu items need null TkConsolePost bindings to avoid the TagProc
    ##
    foreach ev [bind $PRIV(root)] {
        bind TkConsolePost $ev {
            # empty
        }
    }


    # ::tkcon::ClipboardKeysyms --
    # This procedure is invoked to identify the keys that correspond to
    # the copy, cut, and paste functions for the clipboard.
    #
    # Arguments:
    # copy -    Name of the key (keysym name plus modifiers, if any,
    #           such as "Meta-y") used for the copy operation.
    # cut -             Name of the key used for the cut operation.
    # paste -   Name of the key used for the paste operation.

    proc ::tkcon::ClipboardKeysyms {copy cut paste} {
        bind TkConsole <$copy>  {::tkcon::Copy %W}
        bind TkConsole <$cut>   {::tkcon::Cut %W}
        bind TkConsole <$paste> {::tkcon::Paste %W}
    }

    proc ::tkcon::GetSelection {w} {
        if {
            ![catch {selection get -displayof $w -type UTF8_STRING} txt] ||
            ![catch {selection get -displayof $w} txt] ||
            ![catch {selection get -displayof $w -selection CLIPBOARD} txt]
        } {
            return $txt
        }
        return -code error "could not find default selection"
    }

    proc ::tkcon::Cut w {
        if {[string match $w [selection own -displayof $w]]} {
            clipboard clear -displayof $w
            catch {
                set txt [selection get -displayof $w]
                clipboard append -displayof $w $txt
                if {[$w compare sel.first >= limit]} {
                    $w delete sel.first sel.last
                }
            }
        }
    }
    proc ::tkcon::Copy w {
        if {[string match $w [selection own -displayof $w]]} {
            clipboard clear -displayof $w
            catch {
                set txt [selection get -displayof $w]
                clipboard append -displayof $w $txt
            }
        }
    }
    proc ::tkcon::Paste w {
        if {![catch {GetSelection $w} txt]} {
            if {[$w compare insert < limit]} { $w mark set insert end }
            $w insert insert $txt
            $w see insert
            if {[string match *\n* $txt]} { ::tkcon::Eval $w }
        }
    }

    ## Redefine for TkConsole what we need
    ##
    event delete <<Paste>> <Control-V>
    ::tkcon::ClipboardKeysyms <Copy> <Cut> <Paste>

    bind TkConsole <Insert> {
        catch { ::tkcon::Insert %W [::tkcon::GetSelection %W] }
    }

    bind TkConsole <Triple-1> {+
        catch {
            eval %W tag remove sel [%W tag nextrange prompt sel.first sel.last]
            eval %W tag remove sel sel.last-1c
            %W mark set insert sel.first
        }
    }

    ## binding editor needed
    ## binding <events> for .tkconrc

    bind TkConsole <<TkCon_ExpandFile>> {
        if {[%W compare insert > limit]} {::tkcon::Expand %W path}
        break
    }
    bind TkConsole <<TkCon_ExpandProc>> {
        if {[%W compare insert > limit]} {::tkcon::Expand %W proc}
    }
    bind TkConsole <<TkCon_ExpandVar>> {
        if {[%W compare insert > limit]} {::tkcon::Expand %W var}
    }
    bind TkConsole <<TkCon_Expand>> {
        if {[%W compare insert > limit]} {::tkcon::Expand %W}
    }
    bind TkConsole <<TkCon_Tab>> {
        if {[%W compare insert >= limit]} {
            ::tkcon::Insert %W \t
        }
    }
    bind TkConsole <<TkCon_Newline>> {
        if {[%W compare insert >= limit]} {
            ::tkcon::Insert %W \n
        }
    }
    bind TkConsole <<TkCon_Eval>> {
        ::tkcon::Eval %W
    }
    bind TkConsole <Delete> {
        if {[llength [%W tag nextrange sel 1.0 end]] \
                && [%W compare sel.first >= limit]} {
            %W delete sel.first sel.last
        } elseif {[%W compare insert >= limit]} {
            %W delete insert
            %W see insert
        }
    }
    bind TkConsole <BackSpace> {
        if {[llength [%W tag nextrange sel 1.0 end]] \
                && [%W compare sel.first >= limit]} {
            %W delete sel.first sel.last
        } elseif {[%W compare insert != 1.0] && [%W compare insert > limit]} {
            %W delete insert-1c
            %W see insert
        }
    }
    bind TkConsole <Control-h> [bind TkConsole <BackSpace>]

    bind TkConsole <KeyPress> {
        ::tkcon::Insert %W %A
    }

    bind TkConsole <Control-a> {
        if {[%W compare {limit linestart} == {insert linestart}]} {
            tkTextSetCursor %W limit
        } else {
            tkTextSetCursor %W {insert linestart}
        }
    }
    bind TkConsole <Key-Home> [bind TkConsole <Control-a>]
    bind TkConsole <Control-d> {
        if {[%W compare insert < limit]} break
        %W delete insert
    }
    bind TkConsole <Control-k> {
        if {[%W compare insert < limit]} break
        if {[%W compare insert == {insert lineend}]} {
            %W delete insert
        } else {
            %W delete insert {insert lineend}
        }
    }
    bind TkConsole <<TkCon_Clear>> {
        ## Clear console buffer, without losing current command line input
        set ::tkcon::PRIV(tmp) [::tkcon::CmdGet %W]
        clear
        ::tkcon::Prompt {} $::tkcon::PRIV(tmp)
    }
    bind TkConsole <<TkCon_Previous>> {
        if {[%W compare {insert linestart} != {limit linestart}]} {
            tkTextSetCursor %W [tkTextUpDownLine %W -1]
        } else {
            ::tkcon::Event -1
        }
    }
    bind TkConsole <<TkCon_Next>> {
        if {[%W compare {insert linestart} != {end-1c linestart}]} {
            tkTextSetCursor %W [tkTextUpDownLine %W 1]
        } else {
            ::tkcon::Event 1
        }
    }
    bind TkConsole <<TkCon_NextImmediate>>  { ::tkcon::Event 1 }
    bind TkConsole <<TkCon_PreviousImmediate>> { ::tkcon::Event -1 }
    bind TkConsole <<TkCon_PreviousSearch>> {
        ::tkcon::Event -1 [::tkcon::CmdGet %W]
    }
    bind TkConsole <<TkCon_NextSearch>>     {
        ::tkcon::Event 1 [::tkcon::CmdGet %W]
    }
    bind TkConsole <<TkCon_Transpose>>  {
        ## Transpose current and previous chars
        if {[%W compare insert > "limit+1c"]} { tkTextTranspose %W }
    }
    bind TkConsole <<TkCon_ClearLine>> {
        ## Clear command line (Unix shell staple)
        %W delete limit end
    }
    bind TkConsole <<TkCon_SaveCommand>> {
        ## Save command buffer (swaps with current command)
        set ::tkcon::PRIV(tmp) $::tkcon::PRIV(cmdsave)
        set ::tkcon::PRIV(cmdsave) [::tkcon::CmdGet %W]
        if {[string match {} $::tkcon::PRIV(cmdsave)]} {
            set ::tkcon::PRIV(cmdsave) $::tkcon::PRIV(tmp)
        } else {
            %W delete limit end-1c
        }
        ::tkcon::Insert %W $::tkcon::PRIV(tmp)
        %W see end
    }
    catch {bind TkConsole <Key-Page_Up>   { tkTextScrollPages %W -1 }}
    catch {bind TkConsole <Key-Prior>     { tkTextScrollPages %W -1 }}
    catch {bind TkConsole <Key-Page_Down> { tkTextScrollPages %W 1 }}
    catch {bind TkConsole <Key-Next>      { tkTextScrollPages %W 1 }}
    bind TkConsole <$PRIV(meta)-d> {
        if {[%W compare insert >= limit]} {
            %W delete insert {insert wordend}
        }
    }
    bind TkConsole <$PRIV(meta)-BackSpace> {
        if {[%W compare {insert -1c wordstart} >= limit]} {
            %W delete {insert -1c wordstart} insert
        }
    }
    bind TkConsole <$PRIV(meta)-Delete> {
        if {[%W compare insert >= limit]} {
            %W delete insert {insert wordend}
        }
    }
    bind TkConsole <ButtonRelease-2> {
        if {
            (!$tkPriv(mouseMoved) || $tk_strictMotif) &&
            ![catch {::tkcon::GetSelection %W} ::tkcon::PRIV(tmp)]
        } {
            if {[%W compare @%x,%y < limit]} {
                %W insert end $::tkcon::PRIV(tmp)
            } else {
                %W insert @%x,%y $::tkcon::PRIV(tmp)
            }
            if {[string match *\n* $::tkcon::PRIV(tmp)]} {::tkcon::Eval %W}
        }
    }

    ##
    ## End TkConsole bindings
    ##

    ##
    ## Bindings for doing special things based on certain keys
    ##
    bind TkConsolePost <Key-parenright> {
        if {$::tkcon::OPT(lightbrace) && $::tkcon::OPT(blinktime)>99 && \
                [string compare \\ [%W get insert-2c]]} {
            ::tkcon::MatchPair %W \( \) limit
        }
        set ::tkcon::PRIV(StatusCursor) [%W index insert]
    }
    bind TkConsolePost <Key-bracketright> {
        if {$::tkcon::OPT(lightbrace) && $::tkcon::OPT(blinktime)>99 && \
                [string compare \\ [%W get insert-2c]]} {
            ::tkcon::MatchPair %W \[ \] limit
        }
        set ::tkcon::PRIV(StatusCursor) [%W index insert]
    }
    bind TkConsolePost <Key-braceright> {
        if {$::tkcon::OPT(lightbrace) && $::tkcon::OPT(blinktime)>99 && \
                [string compare \\ [%W get insert-2c]]} {
            ::tkcon::MatchPair %W \{ \} limit
        }
        set ::tkcon::PRIV(StatusCursor) [%W index insert]
    }
    bind TkConsolePost <Key-quotedbl> {
        if {$::tkcon::OPT(lightbrace) && $::tkcon::OPT(blinktime)>99 && \
                [string compare \\ [%W get insert-2c]]} {
            ::tkcon::MatchQuote %W limit
        }
        set ::tkcon::PRIV(StatusCursor) [%W index insert]
    }

    bind TkConsolePost <KeyPress> {
        if {$::tkcon::OPT(lightcmd) && [string compare {} %A]} {
            ::tkcon::TagProc %W
        }
        set ::tkcon::PRIV(StatusCursor) [%W index insert]
    }

    bind TkConsolePost <Button-1> {
        set ::tkcon::PRIV(StatusCursor) [%W index insert]
    }
    bind TkConsolePost <B1-Motion> {
        set ::tkcon::PRIV(StatusCursor) [%W index insert]
    }

}

##
# ::tkcon::PopupMenu - what to do when the popup menu is requested
##
proc ::tkcon::PopupMenu {X Y} {
    variable PRIV

    set w $PRIV(console)
    if {[string compare $w [winfo containing $X $Y]]} {
        tk_popup $PRIV(popup) $X $Y
        return
    }
    set x [expr {$X-[winfo rootx $w]}]
    set y [expr {$Y-[winfo rooty $w]}]
    if {[llength [set tags [$w tag names @$x,$y]]]} {
        if {[lsearch -exact $tags "proc"] >= 0} {
            lappend type "proc"
            foreach {first last} [$w tag prevrange proc @$x,$y] {
                set word [$w get $first $last]; break
            }
        }
        if {[lsearch -exact $tags "var"] >= 0} {
            lappend type "var"
            foreach {first last} [$w tag prevrange var @$x,$y] {
                set word [$w get $first $last]; break
            }
        }
    }
    if {![info exists type]} {
        set exp "(^|\[^\\\\\]\[ \t\n\r\])"
        set exp2 "\[\[\\\\\\?\\*\]"
        set i [$w search -backwards -regexp $exp @$x,$y "@$x,$y linestart"]
        if {[string compare {} $i]} {
            if {![string match *.0 $i]} {append i +2c}
            if {[string compare {} \
                    [set j [$w search -regexp $exp $i "$i lineend"]]]} {
                append j +1c
            } else {
                set j "$i lineend"
            }
            regsub -all $exp2 [$w get $i $j] {\\\0} word
            set word [string trim $word {\"$[]{}',?#*}]
            if {[llength [EvalAttached [list info commands $word]]]} {
                lappend type "proc"
            }
            if {[llength [EvalAttached [list info vars $word]]]} {
                lappend type "var"
            }
            if {[EvalAttached [list file isfile $word]]} {
                lappend type "file"
            }
        }
    }
    if {![info exists type] || ![info exists word]} {
        tk_popup $PRIV(popup) $X $Y
        return
    }
    $PRIV(context) delete 0 end
    $PRIV(context) add command -label "$word" -state disabled
    $PRIV(context) add separator
    set app [Attach]
    if {[lsearch $type proc] != -1} {
        $PRIV(context) add command -label "View Procedure" \
                -command [list edit -attach $app -type proc -- $word]
    }
    if {[lsearch $type var] != -1} {
        $PRIV(context) add command -label "View Variable" \
                -command [list edit -attach $app -type var -- $word]
    }
    if {[lsearch $type file] != -1} {
        $PRIV(context) add command -label "View File" \
                -command [list edit -attach $app -type file -- $word]
    }
    tk_popup $PRIV(context) $X $Y
}

## ::tkcon::TagProc - tags a procedure in the console if it's recognized
## This procedure is not perfect.  However, making it perfect wastes
## too much CPU time...
##
proc ::tkcon::TagProc w {
    set exp "\[^\\\\\]\[\[ \t\n\r\;{}\"\$\]"
    set i [$w search -backwards -regexp $exp insert-1c limit-1c]
    if {[string compare {} $i]} {append i +2c} else {set i limit}
    regsub -all "\[\[\\\\\\?\\*\]" [$w get $i "insert-1c wordend"] {\\\0} c
    if {[llength [EvalAttached [list info commands $c]]]} {
        $w tag add proc $i "insert-1c wordend"
    } else {
        $w tag remove proc $i "insert-1c wordend"
    }
    if {[llength [EvalAttached [list info vars $c]]]} {
        $w tag add var $i "insert-1c wordend"
    } else {
        $w tag remove var $i "insert-1c wordend"
    }
}

## ::tkcon::MatchPair - blinks a matching pair of characters
## c2 is assumed to be at the text index 'insert'.
## This proc is really loopy and took me an hour to figure out given
## all possible combinations with escaping except for escaped \'s.
## It doesn't take into account possible commenting... Oh well.  If
## anyone has something better, I'd like to see/use it.  This is really
## only efficient for small contexts.
# ARGS: w       - console text widget
#       c1      - first char of pair
#       c2      - second char of pair
# Calls:        ::tkcon::Blink
## 
proc ::tkcon::MatchPair {w c1 c2 {lim 1.0}} {
    if {[string compare {} [set ix [$w search -back $c1 insert $lim]]]} {
        while {
            [string match {\\} [$w get $ix-1c]] &&
            [string compare {} [set ix [$w search -back $c1 $ix-1c $lim]]]
        } {}
        set i1 insert-1c
        while {[string compare {} $ix]} {
            set i0 $ix
            set j 0
            while {[string compare {} [set i0 [$w search $c2 $i0 $i1]]]} {
                append i0 +1c
                if {[string match {\\} [$w get $i0-2c]]} continue
                incr j
            }
            if {!$j} break
            set i1 $ix
            while {$j && [string compare {} \
                    [set ix [$w search -back $c1 $ix $lim]]]} {
                if {[string match {\\} [$w get $ix-1c]]} continue
                incr j -1
            }
        }
        if {[string match {} $ix]} { set ix [$w index $lim] }
    } else { set ix [$w index $lim] }
    if {$::tkcon::OPT(blinkrange)} {
        Blink $w $ix [$w index insert]
    } else {
        Blink $w $ix $ix+1c [$w index insert-1c] [$w index insert]
    }
}

## ::tkcon::MatchQuote - blinks between matching quotes.
## Blinks just the quote if it's unmatched, otherwise blinks quoted string
## The quote to match is assumed to be at the text index 'insert'.
# ARGS: w       - console text widget
# Calls:        ::tkcon::Blink
## 
proc ::tkcon::MatchQuote {w {lim 1.0}} {
    set i insert-1c
    set j 0
    while {[string compare [set i [$w search -back \" $i $lim]] {}]} {
        if {[string match {\\} [$w get $i-1c]]} continue
        if {!$j} {set i0 $i}
        incr j
    }
    if {$j&1} {
        if {$::tkcon::OPT(blinkrange)} {
            Blink $w $i0 [$w index insert]
        } else {
            Blink $w $i0 $i0+1c [$w index insert-1c] [$w index insert]
        }
    } else {
        Blink $w [$w index insert-1c] [$w index insert]
    }
}

## ::tkcon::Blink - blinks between n index pairs for a specified duration.
# ARGS: w       - console text widget
#       i1      - start index to blink region
#       i2      - end index of blink region
#       dur     - duration in usecs to blink for
# Outputs:      blinks selected characters in $w
## 
proc ::tkcon::Blink {w args} {
    eval [list $w tag add blink] $args
    after $::tkcon::OPT(blinktime) [list $w] tag remove blink $args
    return
}


## ::tkcon::Insert
## Insert a string into a text console at the point of the insertion cursor.
## If there is a selection in the text, and it covers the point of the
## insertion cursor, then delete the selection before inserting.
# ARGS: w       - text window in which to insert the string
#       s       - string to insert (usually just a single char)
# Outputs:      $s to text widget
## 
proc ::tkcon::Insert {w s} {
    if {[string match {} $s] || [string match disabled [$w cget -state]]} {
        return
    }
    if {[$w comp insert < limit]} {
        $w mark set insert end
    }
    if {[llength [$w tag ranges sel]] && \
            [$w comp sel.first <= insert] && [$w comp sel.last >= insert]} {
        $w delete sel.first sel.last
    }
    $w insert insert $s
    $w see insert
}

## ::tkcon::Expand - 
# ARGS: w       - text widget in which to expand str
#       type    - type of expansion (path / proc / variable)
# Calls:        ::tkcon::Expand(Pathname|Procname|Variable)
# Outputs:      The string to match is expanded to the longest possible match.
#               If ::tkcon::OPT(showmultiple) is non-zero and the user longest
#               match equaled the string to expand, then all possible matches
#               are output to stdout.  Triggers bell if no matches are found.
# Returns:      number of matches found
## 
proc ::tkcon::Expand {w {type ""}} {
    set exp "\[^\\\\\]\[\[ \t\n\r\\\{\"$\]"
    set tmp [$w search -backwards -regexp $exp insert-1c limit-1c]
    if {[string compare {} $tmp]} {append tmp +2c} else {set tmp limit}
    if {[$w compare $tmp >= insert]} return
    set str [$w get $tmp insert]
    switch -glob $type {
        pa* { set res [ExpandPathname $str] }
        pr* { set res [ExpandProcname $str] }
        v*  { set res [ExpandVariable $str] }
        default {
            set res {}
            foreach t $::tkcon::OPT(expandorder) {
                if {![catch {Expand$t $str} res] && \
                        [string compare {} $res]} break
            }
        }
    }
    set len [llength $res]
    if {$len} {
        $w delete $tmp insert
        $w insert $tmp [lindex $res 0]
        if {$len > 1} {
            if {$::tkcon::OPT(showmultiple) && \
                    ![string compare [lindex $res 0] $str]} {
                puts stdout [lsort [lreplace $res 0 0]]
            }
        }
    } else { bell }
    return [incr len -1]
}

## ::tkcon::ExpandPathname - expand a file pathname based on $str
## This is based on UNIX file name conventions
# ARGS: str     - partial file pathname to expand
# Calls:        ::tkcon::ExpandBestMatch
# Returns:      list containing longest unique match followed by all the
#               possible further matches
## 
proc ::tkcon::ExpandPathname str {
    set pwd [EvalAttached pwd]
    # Cause a string like {C:/Program\ Files/} to become "C:/Program Files/"
    regsub -all {\\([][ ])} $str {\1} str
    if {[catch {EvalAttached [list cd [file dirname $str]]} err]} {
        return -code error $err
    }
    set dir [file tail $str]
    ## Check to see if it was known to be a directory and keep the trailing
    ## slash if so (file tail cuts it off)
    if {[string match */ $str]} { append dir / }
    # Create a safely glob-able name
    regsub -all {([][])} $dir {\\\1} safedir
    if {[catch {lsort [EvalAttached [list glob $safedir*]]} m]} {
        set match {}
    } else {
        if {[llength $m] > 1} {
            global tcl_platform
            if {[string match windows $tcl_platform(platform)]} {
                ## Windows is screwy because it's case insensitive
                set tmp [ExpandBestMatch [string tolower $m] \
                        [string tolower $dir]]
                ## Don't change case if we haven't changed the word
                if {[string length $dir]==[string length $tmp]} {
                    set tmp $dir
                }
            } else {
                set tmp [ExpandBestMatch $m $dir]
            }
            if {[string match */* $str]} {
                set tmp [string trimright [file dirname $str] /]/$tmp
            }
            regsub -all {([^\\])([][ ])} $tmp {\1\\\2} tmp
            set match [linsert $m 0 $tmp]
        } else {
            ## This may look goofy, but it handles spaces in path names
            eval append match $m
            if {[file isdirectory $match]} {append match /}
            if {[string match */* $str]} {
                set match [string trimright [file dirname $str] /]/$match
            }
            regsub -all {([^\\])([][ ])} $match {\1\\\2} match
            ## Why is this one needed and the ones below aren't!!
            set match [list $match]
        }
    }
    EvalAttached [list cd $pwd]
    return $match
}

## ::tkcon::ExpandProcname - expand a tcl proc name based on $str
# ARGS: str     - partial proc name to expand
# Calls:        ::tkcon::ExpandBestMatch
# Returns:      list containing longest unique match followed by all the
#               possible further matches
##
proc ::tkcon::ExpandProcname str {
    set match [EvalAttached [list info commands $str*]]
    if {[llength $match] == 0} {
        set ns [EvalAttached \
                "namespace children \[namespace current\] [list $str*]"]
        if {[llength $ns]==1} {
            set match [EvalAttached [list info commands ${ns}::*]]
        } else {
            set match $ns
        }
    }
    if {[llength $match] > 1} {
        regsub -all {([^\\]) } [ExpandBestMatch $match $str] {\1\\ } str
        set match [linsert $match 0 $str]
    } else {
        regsub -all {([^\\]) } $match {\1\\ } match
    }
    return $match
}

## ::tkcon::ExpandVariable - expand a tcl variable name based on $str
# ARGS: str     - partial tcl var name to expand
# Calls:        ::tkcon::ExpandBestMatch
# Returns:      list containing longest unique match followed by all the
#               possible further matches
## 
proc ::tkcon::ExpandVariable str {
    if {[regexp {([^\(]*)\((.*)} $str junk ary str]} {
        ## Looks like they're trying to expand an array.
        set match [EvalAttached [list array names $ary $str*]]
        if {[llength $match] > 1} {
            set vars $ary\([ExpandBestMatch $match $str]
            foreach var $match {lappend vars $ary\($var\)}
            return $vars
        } else {set match $ary\($match\)}
        ## Space transformation avoided for array names.
    } else {
        set match [EvalAttached [list info vars $str*]]
        if {[llength $match] > 1} {
            regsub -all {([^\\]) } [ExpandBestMatch $match $str] {\1\\ } str
            set match [linsert $match 0 $str]
        } else {
            regsub -all {([^\\]) } $match {\1\\ } match
        }
    }
    return $match
}

## ::tkcon::ExpandBestMatch2 - finds the best unique match in a list of names
## Improves upon the speed of the below proc only when $l is small
## or $e is {}.  $e is extra for compatibility with proc below.
# ARGS: l       - list to find best unique match in
# Returns:      longest unique match in the list
## 
proc ::tkcon::ExpandBestMatch2 {l {e {}}} {
    set s [lindex $l 0]
    if {[llength $l]>1} {
        set i [expr {[string length $s]-1}]
        foreach l $l {
            while {$i>=0 && [string first $s $l]} {
                set s [string range $s 0 [incr i -1]]
            }
        }
    }
    return $s
}

## ::tkcon::ExpandBestMatch - finds the best unique match in a list of names
## The extra $e in this argument allows us to limit the innermost loop a
## little further.  This improves speed as $l becomes large or $e becomes long.
# ARGS: l       - list to find best unique match in
#       e       - currently best known unique match
# Returns:      longest unique match in the list
## 
proc ::tkcon::ExpandBestMatch {l {e {}}} {
    set ec [lindex $l 0]
    if {[llength $l]>1} {
        set e  [string length $e]; incr e -1
        set ei [string length $ec]; incr ei -1
        foreach l $l {
            while {$ei>=$e && [string first $ec $l]} {
                set ec [string range $ec 0 [incr ei -1]]
            }
        }
    }
    return $ec
}

# Here is a group of functions that is only used when Tkcon is
# executed in a safe interpreter. It provides safe versions of
# missing functions. For example:
#
# - "tk appname" returns "tkcon.tcl" but cannot be set
# - "toplevel" is equivalent to 'frame', only it is automatically
#   packed.
# - The 'source', 'load', 'open', 'file' and 'exit' functions are
#   mapped to corresponding functions in the parent interpreter.
#
# Further on, Tk cannot be really loaded. Still the safe 'load'
# provedes a speciall case. The Tk can be divided into 4 groups,
# that each has a safe handling procedure.
#
# - "::tkcon::SafeItem" handles commands like 'button', 'canvas' ......
#   Each of these functions has the window name as first argument.
# - "::tkcon::SafeManage" handles commands like 'pack', 'place', 'grid',
#   'winfo', which can have multiple window names as arguments.
# - "::tkcon::SafeWindow" handles all windows, such as '.'. For every
#   window created, a new alias is formed which also is handled by
#   this function.
# - Other (e.g. bind, bindtag, image), which need their own function.
#
## These functions courtesy Jan Nijtmans (nijtmans@nici.kun.nl)
##
if {[string compare [info command tk] tk]} {
    proc tk {option args} {
        if {![string match app* $option]} {
            error "wrong option \"$option\": should be appname"
        }
        return "tkcon.tcl"
    }
}

if {[string compare [info command toplevel] toplevel]} {
    proc toplevel {name args} {
        eval frame $name $args
        pack $name
    }
}

proc ::tkcon::SafeSource {i f} {
    set fd [open $f r]
    set r [read $fd]
    close $fd
    if {[catch {interp eval $i $r} msg]} {
        error $msg
    }
}

proc ::tkcon::SafeOpen {i f {m r}} {
    set fd [open $f $m]
    interp transfer {} $fd $i
    return $fd
}

proc ::tkcon::SafeLoad {i f p} {
    global tk_version tk_patchLevel tk_library auto_path
    if {[string compare $p Tk]} {
        load $f $p $i
    } else {
        foreach command {button canvas checkbutton entry frame label
        listbox message radiobutton scale scrollbar spinbox text toplevel} {
            $i alias $command ::tkcon::SafeItem $i $command
        }
        $i alias image ::tkcon::SafeImage $i
        foreach command {pack place grid destroy winfo} {
            $i alias $command ::tkcon::SafeManage $i $command
        }
        if {[llength [info command event]]} {
            $i alias event ::tkcon::SafeManage $i $command
        }
        frame .${i}_dot -width 300 -height 300 -relief raised
        pack .${i}_dot -side left
        $i alias tk tk
        $i alias bind ::tkcon::SafeBind $i
        $i alias bindtags ::tkcon::SafeBindtags $i
        $i alias . ::tkcon::SafeWindow $i {}
        foreach var {tk_version tk_patchLevel tk_library auto_path} {
            $i eval set $var [list [set $var]]
        }
        $i eval {
            package provide Tk $tk_version
            if {[lsearch -exact $auto_path $tk_library] < 0} {
                lappend auto_path $tk_library
            }
        }
        return ""
    }
}

proc ::tkcon::SafeSubst {i a} {
    set arg1 ""
    foreach {arg value} $a {
        if {![string compare $arg -textvariable] ||
        ![string compare $arg -variable]} {
            set newvalue "[list $i] $value"
            global $newvalue
            if {[interp eval $i info exists $value]} {
                set $newvalue [interp eval $i set $value]
            } else {
                catch {unset $newvalue}
            }
            $i eval trace variable $value rwu \{[list tkcon set $newvalue $i]\}
            set value $newvalue
        } elseif {![string compare $arg -command]} {
            set value [list $i eval $value]
        }
        lappend arg1 $arg $value
    }
    return $arg1
}

proc ::tkcon::SafeItem {i command w args} {
    set args [::tkcon::SafeSubst $i $args]
    set code [catch "$command [list .${i}_dot$w] $args" msg]
    $i alias $w ::tkcon::SafeWindow $i $w
    regsub -all .${i}_dot $msg {} msg
    return -code $code $msg
}

proc ::tkcon::SafeManage {i command args} {
    set args1 ""
    foreach arg $args {
        if {[string match . $arg]} {
            set arg .${i}_dot
        } elseif {[string match .* $arg]} {
            set arg ".${i}_dot$arg"
        }
        lappend args1 $arg
    }
    set code [catch "$command $args1" msg]
    regsub -all .${i}_dot $msg {} msg
    return -code $code $msg
}

#
# FIX: this function doesn't work yet if the binding starts with '+'.
#
proc ::tkcon::SafeBind {i w args} {
    if {[string match . $w]} {
        set w .${i}_dot
    } elseif {[string match .* $w]} {
        set w ".${i}_dot$w"
    }
    if {[llength $args] > 1} {
        set args [list [lindex $args 0] \
                "[list $i] eval [list [lindex $args 1]]"]
    }
    set code [catch "bind $w $args" msg]
    if {[llength $args] <2 && $code == 0} {
        set msg [lindex $msg 3]
    }
    return -code $code $msg
}

proc ::tkcon::SafeImage {i option args} {
    set code [catch "image $option $args" msg]
    if {[string match cr* $option]} {
        $i alias $msg $msg
    }
    return -code $code $msg
}

proc ::tkcon::SafeBindtags {i w {tags {}}} {
    if {[string match . $w]} {
        set w .${i}_dot
    } elseif {[string match .* $w]} {
        set w ".${i}_dot$w"
    }
    set newtags {}
    foreach tag $tags {
        if {[string match . $tag]} {
            lappend newtags .${i}_dot
        } elseif {[string match .* $tag]} {
            lappend newtags ".${i}_dot$tag"
        } else {
            lappend newtags $tag
        }
    }
    if {[string match $tags {}]} {
        set code [catch {bindtags $w} msg]
        regsub -all \\.${i}_dot $msg {} msg
    } else {
        set code [catch {bindtags $w $newtags} msg]
    }
    return -code $code $msg
}

proc ::tkcon::SafeWindow {i w option args} {
    if {[string match conf* $option] && [llength $args] > 1} {
        set args [::tkcon::SafeSubst $i $args]
    } elseif {[string match itemco* $option] && [llength $args] > 2} {
        set args "[list [lindex $args 0]] [::tkcon::SafeSubst $i [lrange $args 1 end]]"
    } elseif {[string match cr* $option]} {
        if {[llength $args]%2} {
            set args "[list [lindex $args 0]] [::tkcon::SafeSubst $i [lrange $args 1 end]]"
        } else {
            set args [::tkcon::SafeSubst $i $args]
        }
    } elseif {[string match bi* $option] && [llength $args] > 2} {
        set args [list [lindex $args 0] [lindex $args 1] "[list $i] eval [list [lindex $args 2]]"]
    }
    set code [catch ".${i}_dot$w $option $args" msg]
    if {$code} {
        regsub -all .${i}_dot $msg {} msg
    } elseif {[string match conf* $option] || [string match itemco* $option]} {
        if {[llength $args] == 1} {
            switch -- $args {
                -textvariable - -variable {
                    set msg "[lrange $msg 0 3] [list [lrange [lindex $msg 4] 1 end]]"
                }
                -command - updatecommand {
                    set msg "[lrange $msg 0 3] [list [lindex [lindex $msg 4] 2]]"
                }
            }
        } elseif {[llength $args] == 0} {
            set args1 ""
            foreach el $msg {
                switch -- [lindex $el 0] {
                    -textvariable - -variable {
                        set el "[lrange $el 0 3] [list [lrange [lindex $el 4] 1 end]]"
                    }
                    -command - updatecommand {
                        set el "[lrange $el 0 3] [list [lindex [lindex $el 4] 2]]"
                    }
                }
                lappend args1 $el
            }
            set msg $args1
        }
    } elseif {[string match cg* $option] || [string match itemcg* $option]} {
        switch -- $args {
            -textvariable - -variable {
                set msg [lrange $msg 1 end]
            }
            -command - updatecommand {
                set msg [lindex $msg 2]
            }
        }
    } elseif {[string match bi* $option]} {
        if {[llength $args] == 2 && $code == 0} {
            set msg [lindex $msg 2]
        }
    }
    return -code $code $msg
}

proc ::tkcon::RetrieveFilter {host} {
    variable PRIV
    set result {}
    if {[info exists PRIV(proxy)]} {
        if {![regexp "^(localhost|127\.0\.0\.1)" $host]} {
            set result [lrange [split [lindex $PRIV(proxy) 0] :] 0 1]
        }
    }
    return $result
}

proc ::tkcon::RetrieveAuthentication {} {
    package require Tk
    if {[catch {package require base64}]} {
        if {[catch {package require Trf}]} {
            error "base64 support not available"
        } else {
            set local64 "base64 -mode enc"
        }
    } else {
        set local64 "base64::encode"
    }

    set dlg [toplevel .auth]
    wm title $dlg "Authenticating Proxy Configuration"
    set f1 [frame ${dlg}.f1]
    set f2 [frame ${dlg}.f2]
    button $f2.b -text "OK" -command "destroy $dlg"
    pack $f2.b -side right
    label $f1.l2 -text "Username"
    label $f1.l3 -text "Password"
    entry $f1.e2 -textvariable "[namespace current]::conf_userid"
    entry $f1.e3 -textvariable "[namespace current]::conf_passwd" -show *
    grid $f1.l2 -column 0 -row 0 -sticky e
    grid $f1.l3 -column 0 -row 1 -sticky e
    grid $f1.e2 -column 1 -row 0 -sticky news
    grid $f1.e3 -column 1 -row 1 -sticky news
    grid columnconfigure $f1 1 -weight 1
    pack $f2 -side bottom -fill x
    pack $f1 -side top -anchor n -fill both -expand 1
    tkwait window $dlg
    set result {}
    if {[info exists [namespace current]::conf_userid]} {
        set data [subst $[namespace current]::conf_userid]
        append data : [subst $[namespace current]::conf_passwd]
        set data [$local64 $data]
        set result [list "Proxy-Authorization" "Basic $data"]
    }
    unset [namespace current]::conf_passwd
    return $result
}

proc ::tkcon::Retrieve {} {
    # A little bit'o'magic to grab the latest tkcon from CVS and
    # save it locally.  It doesn't support proxies though...
    variable PRIV

    set defExt ""
    if {[string match "windows" $::tcl_platform(platform)]} {
        set defExt ".tcl"
    }
    set file [tk_getSaveFile -title "Save Latest tkcon to ..." \
            -defaultextension $defExt \
            -initialdir  [file dirname $PRIV(SCRIPT)] \
            -initialfile [file tail $PRIV(SCRIPT)] \
            -parent $PRIV(root) \
            -filetypes {{"Tcl Files" {.tcl .tk}} {"All Files" {*.*}}}]
    if {[string compare $file ""]} {
        package require http 2
        set token [::http::geturl $PRIV(HEADURL) -timeout 30000]
        ::http::wait $token
        set code [catch {
            if {[::http::status $token] == "ok"} {
                set fid [open $file w]
                # We don't want newline mode to change
                fconfigure $fid -translation binary
                set data [::http::data $token]
                puts -nonewline $fid $data
                close $fid
                regexp {Id: tkcon.tcl,v (\d+\.\d+)} $data -> rcsVersion
                regexp {version\s+(\d+\.\d[^\n]*)} $data -> tkconVersion
            }
        } err]
        ::http::cleanup $token
        if {$code} {
            return -code error $err
        } elseif {[tk_messageBox -type yesno -icon info -parent $PRIV(root) \
                -title "Retrieved tkcon v$tkconVersion, RCS $rcsVersion" \
                -message "Successfully retrieved tkcon v$tkconVersion,\
                RCS $rcsVersion.  Shall I resource (not restart) this\
                version now?"] == "yes"} {
            set PRIV(SCRIPT) $file
            set PRIV(version) $tkconVersion.$rcsVersion
            ::tkcon::Resource
        }
    }
}

## ::tkcon::Resource - re'source's this script into current console
## Meant primarily for my development of this program.  It follows
## links until the ultimate source is found.
## 
set ::tkcon::PRIV(SCRIPT) [info script]
if {!$::tkcon::PRIV(WWW) && [string compare $::tkcon::PRIV(SCRIPT) {}]} {
    # we use a catch here because some wrap apps choke on 'file type'
    # because TclpLstat wasn't wrappable until 8.4.
    catch {
        while {[string match link [file type $::tkcon::PRIV(SCRIPT)]]} {
            set link [file readlink $::tkcon::PRIV(SCRIPT)]
            if {[string match relative [file pathtype $link]]} {
                set ::tkcon::PRIV(SCRIPT) \
                        [file join [file dirname $::tkcon::PRIV(SCRIPT)] $link]
            } else {
                set ::tkcon::PRIV(SCRIPT) $link
            }
        }
        catch {unset link}
        if {[string match relative [file pathtype $::tkcon::PRIV(SCRIPT)]]} {
            set ::tkcon::PRIV(SCRIPT) [file join [pwd] $::tkcon::PRIV(SCRIPT)]
        }
    }
}

proc ::tkcon::Resource {} {
    uplevel \#0 {
        if {[catch {source -rsrc tkcon}]} { source $::tkcon::PRIV(SCRIPT) }
    }
    Bindings
    InitSlave $::tkcon::OPT(exec)
}

## Initialize only if we haven't yet
##
if {![info exists ::tkcon::PRIV(root)] || \
        ![winfo exists $::tkcon::PRIV(root)]} {
    ::tkcon::Init
}