ROX-Lib2/python/rox/mime_handler.py

   1 """This module allows applications to set themselves as the default handler for
   2 a particular MIME type. This is generally not a good thing to do, because it
   3 annoys users if programs fight over the defaults."""
   4
   5 import os
   6
   7 import rox
   8 from rox import _, mime, choices, basedir
   9
  10 SITE='rox.sourceforge.net'
  11
  12 _TNAME = 0
  13 _COMMENT = 1
  14 _CURRENT = 2
  15 _INSTALL = 3
  16 _ICON = 4
  17 _UNINSTALL = 5
  18 _IS_OURS = 6   # Hidden column
  19
  20 def load_path(site, dir, leaf):
  21     path=None
  22     try:
  23         path=basedir.load_first_config(site, dir, leaf)
  24         if not path:
  25             path=choices.load(dir, leaf)
  26     except:
  27         pass
  28     return path
  29
  30 def save_path(site, dir, leaf, create=1):
  31     filer=basedir.load_first_config(SITE, 'ROX-Filer')
  32
  33     if filer and os.path.isdir(filer):
  34         path=basedir.save_config_path(site, dir)
  35         path=os.path.join(path, leaf)
  36     else:
  37         path=choices.save(dir, leaf, create)
  38
  39     return path
  40
  41 class InstallList(rox.Dialog):
  42     """Dialog to select installation of MIME type handlers"""
  43     def __init__(self, application, itype, dir, types, info=None, check=True,
  44                  site=SITE):
  45         """Create the install list dialog.
  46         application - path to application to install
  47         itype - string describing the type of action to install
  48         dir - directory in Choices to store links in
  49         types - list of MIME types
  50         info - optional message to display below list
  51         check - if true (the default), check for existing entries"""
  52         rox.Dialog.__init__(self, title=_('Install %s') % itype,
  53                             buttons=(rox.g.STOCK_CANCEL, rox.g.RESPONSE_CLOSE,
  54                                      rox.g.STOCK_OK, rox.g.RESPONSE_ACCEPT))
  55
  56         self.itype=itype
  57         self.dir=dir
  58         self.site=site
  59         self.types=types
  60         self.app=application
  61         self.aname=os.path.basename(application)
  62         self.check=check
  63
  64         vbox=self.vbox
  65
  66         swin = rox.g.ScrolledWindow()
  67         swin.set_size_request(-1, 160)
  68         swin.set_border_width(4)
  69         swin.set_policy(rox.g.POLICY_NEVER, rox.g.POLICY_ALWAYS)
  70         swin.set_shadow_type(rox.g.SHADOW_IN)
  71         vbox.pack_start(swin, True, True, 0)
  72
  73         self.model = rox.g.ListStore(str, str, str, int, rox.g.gdk.Pixbuf,
  74                                      int, int)
  75         view = rox.g.TreeView(self.model)
  76         self.view = view
  77         swin.add(view)
  78         view.set_search_column(1)
  79
  80         cell = rox.g.CellRendererPixbuf()
  81         column = rox.g.TreeViewColumn('', cell, pixbuf = _ICON)
  82         view.append_column(column)
  83
  84         cell = rox.g.CellRendererText()
  85         column = rox.g.TreeViewColumn(_('Type'), cell, text = _TNAME)
  86         view.append_column(column)
  87         column.set_sort_column_id(_TNAME)
  88
  89         cell = rox.g.CellRendererText()
  90         column = rox.g.TreeViewColumn(_('Name'), cell, text = _COMMENT)
  91         view.append_column(column)
  92         column.set_sort_column_id(_COMMENT)
  93
  94         if check:
  95             cell = rox.g.CellRendererText()
  96             column = rox.g.TreeViewColumn(_('Current'), cell, text = _CURRENT)
  97             view.append_column(column)
  98             column.set_sort_column_id(_CURRENT)
  99
 100         cell = rox.g.CellRendererToggle()
 101         cell.set_property('activatable', True)
 102         cell.connect('toggled', self.install_toggled, self.model)
 103         column = rox.g.TreeViewColumn(_('Install?'), cell, active = _INSTALL)
 104         view.append_column(column)
 105         column.set_sort_column_id(_INSTALL)
 106
 107         cell = rox.g.CellRendererToggle()
 108         cell.connect('toggled', self.uninstall_toggled, self.model)
 109         column = rox.g.TreeViewColumn(_('Uninstall?'), cell, active = _UNINSTALL,
 110                                       activatable= _IS_OURS)
 111         view.append_column(column)
 112         column.set_sort_column_id(_UNINSTALL)
 113
 114         view.get_selection().set_mode(rox.g.SELECTION_NONE)
 115
 116         if info:
 117                 hbox=rox.g.HBox(spacing=4)
 118                 img=rox.g.image_new_from_stock(rox.g.STOCK_DIALOG_INFO,
 119                                                rox.g.ICON_SIZE_DIALOG)
 120                 hbox.pack_start(img)
 121
 122                 lbl=rox.g.Label(info)
 123                 lbl.set_line_wrap(True)
 124                 hbox.pack_start(lbl)
 125
 126                 vbox.pack_start(hbox)
 127
 128         vbox.show_all()
 129
 130         self.load_types()
 131
 132     def install_toggled(self, cell, path, model):
 133         """Handle the CellRedererToggle stuff for the install column"""
 134         if type(path) == str:
 135                 # Does this vary by pygtk version?
 136                 titer=model.iter_nth_child(None, int(path))
 137         else:
 138                 titer=model.get_iter(path)
 139         model.set_value(titer, _INSTALL, not cell.get_active())
 140         if not cell.get_active():
 141             model.set_value(titer, _UNINSTALL, 0)
 142
 143     def uninstall_toggled(self, cell, path, model):
 144         """Handle the CellRedererToggle stuff for the uninstall column"""
 145         if type(path) == str:
 146                 # Does this vary by pygtk version?
 147                 titer=model.iter_nth_child(None, int(path))
 148         else:
 149                 titer=model.get_iter(path)
 150         avail=model.get_value(titer, _IS_OURS)
 151         if avail:
 152             model.set_value(titer, _UNINSTALL, not cell.get_active())
 153             if not cell.get_active():
 154                 model.set_value(titer, _INSTALL, 0)
 155         else:
 156             model.set_value(titer, _UNINSTALL, 0)
 157
 158     def load_types(self):
 159         """Load list of types into window"""
 160         self.model.clear()
 161
 162         for tname in self.types:
 163             mime_type=mime.lookup(tname)
 164             if self.check:
 165                     old=load_path(self.site, self.dir,
 166                                   '%s_%s' %
 167                                          (mime_type.media, mime_type.subtype))
 168                     if old and os.path.islink(old):
 169                             old=os.readlink(old)
 170                             oname=os.path.basename(old)
 171                     elif old:
 172                             oname='script'
 173                     else:
 174                             oname=''
 175
 176                     if old==self.app:
 177                             dinstall=False
 178                             can_un=True
 179                     else:
 180                             dinstall=True
 181                             can_un=False
 182             else:
 183                     dinstall=True
 184                     can_un=False
 185                     oname=''
 186
 187             icon=mime_type.get_icon(mime.ICON_SIZE_SMALL)
 188
 189             titer=self.model.append()
 190             self.model.set(titer, _TNAME, tname,
 191                            _COMMENT, mime_type.get_comment(),
 192                            _INSTALL, dinstall,
 193                            _UNINSTALL, False, _IS_OURS, can_un)
 194             if self.check:
 195                     self.model.set(titer, _CURRENT, oname)
 196             if icon:
 197                     self.model.set(titer, _ICON, icon)
 198
 199
 200     def get_active(self):
 201         """Return list of types selected for installing"""
 202         titer=self.model.get_iter_first()
 203         active=[]
 204         while titer:
 205             if self.model.get_value(titer, _INSTALL):
 206                 active.append(self.model.get_value(titer, _TNAME))
 207             titer=self.model.iter_next(titer)
 208
 209         return active
 210
 211     def get_uninstall(self):
 212         """Return list of types selected for uninstalling"""
 213         titer=self.model.get_iter_first()
 214         uninstall=[]
 215         while titer:
 216             if self.model.get_value(titer, _UNINSTALL) and self.model.get_value(titer, _IS_OURS):
 217                 uninstall.append(self.model.get_value(titer, _TNAME))
 218             titer=self.model.iter_next(titer)
 219
 220         return uninstall
 221
 222 def _run_by_injector():
 223     """Internal function."""
 224     try:
 225         from zeroinstall.injector import basedir
 226         for d in basedir.xdg_cache_dirs:
 227             if rox.app_dir.find(d)==0:
 228                 # Applicaion is in a cache dir
 229                 return True
 230             elif rox._roxlib_dir.find(d)==0:
 231                 # ROX-Lib is in a cache dir, we are probably being run by the
 232                 # injector
 233                 return True
 234
 235     except:
 236         pass
 237     return False
 238
 239 def _install_at(path, app_dir, injint):
 240     """Internal function.  Set one type."""
 241     tmp=path+'.tmp%d' % os.getpid()
 242     if injint and _run_by_injector(app_dir):
 243         f=file(tmp, 'w')
 244         f.write('#!/bin/sh\n')
 245         f.write('0launch -c "%s" "$@"\n' % injint)
 246         f.close()
 247         os.chmod(tmp, 0755)
 248     else:
 249         os.symlink(app_dir, tmp)
 250
 251     if os.access(path, os.F_OK):
 252         os.remove(path)
 253     os.rename(tmp, path)
 254
 255 def _install_type_handler(types, dir, desc, application=None, overwrite=True,
 256                           info=None, injint=None):
 257     """Internal function.  Does the work of setting MIME-types or MIME-thumb"""
 258     if len(types)<1:
 259             return
 260
 261     if not application:
 262             application=rox.app_dir
 263     if application[0]!='/':
 264             application=os.path.abspath(application)
 265
 266     win=InstallList(application, desc, dir, types, info)
 267
 268     if win.run()!=int(rox.g.RESPONSE_ACCEPT):
 269             win.destroy()
 270             return
 271
 272     try:
 273             types=win.get_active()
 274
 275             for tname in types:
 276                 mime_type = mime.lookup(tname)
 277
 278                 sname=save_path(SITE, dir,
 279                               '%s_%s' % (mime_type.media, mime_type.subtype))
 280                 _install_at(sname, application, injint)
 281
 282             types=win.get_uninstall()
 283
 284             for tname in types:
 285                 mime_type = mime.lookup(tname)
 286
 287                 sname=save_path(SITE, dir,
 288                                '%s_%s' % (mime_type.media, mime_type.subtype))
 289                 os.remove(sname)
 290     finally:
 291             win.destroy()
 292
 293 run_action_msg=_("""Run actions can be changed by selecting a file of the appropriate type in the Filer and selecting the menu option 'Set Run Action...'""")
 294 def install_run_action(types, application=None, overwrite=True, injint=None):
 295         """Install application as the run action for 1 or more types.
 296         application should be the full path to the AppDir.
 297         If application is None then it is the running program which will
 298         be installed.  If overwrite is False then existing run actions will
 299         not be changed.  The user is asked to confirm the setting for each
 300         type."""
 301         _install_type_handler(types, "MIME-types", _("run action"),
 302                              application, overwrite, run_action_msg,
 303                               injint)
 304
 305 def install_thumbnailer(types, application=None, overwrite=True, injint=None):
 306         """Install application as the thumbnail handler for 1 or more types.
 307         application should be the full path to the AppDir.
 308         If application is None then it is the running program which will
 309         be installed.  If overwrite is False then existing thumbnailerss will
 310         not be changed.  The user is asked to confirm the setting for each
 311         type."""
 312         _install_type_handler(types, "MIME-thumb", _("thumbnail handler"),
 313                              application, overwrite, _("""Thumbnail handlers provide support for creating thumbnail images of types of file.  The filer can generate thumbnails for most types of image (JPEG, PNG, etc.) but relies on helper applications for the others."""),
 314                               injint)
 315
 316 def install_send_to_types(types, application=None, injint=None):
 317         """Install application in the SendTo menu for 1 or more types.
 318         application should be the full path to the AppDir.
 319         If application is None then it is the running program which will
 320         be installed.  The user is asked to confirm the setting for each
 321         type."""
 322         if len(types)<1:
 323                 return
 324
 325         if not application:
 326                 application=rox.app_dir
 327         if application[0]!='/':
 328                 application=os.path.abspath(application)
 329
 330         win=InstallList(application, _('type handler'), 'SendTo', types,
 331                         _("""The application can handle files of these types.  Click on OK to add it to the SendTo menu for the type of file, and also the customized File menu."""),
 332                         check=False)
 333
 334         if win.run()!=int(rox.g.RESPONSE_ACCEPT):
 335                 win.destroy()
 336                 return
 337
 338         types=win.get_active()
 339
 340         for tname in types:
 341                 mime_type=mime.lookup(tname)
 342
 343                 sname=save_path(SITE, 'SendTo/.%s_%s' %  (mime_type.media,
 344                                                             mime_type.subtype),
 345                                           win.aname)
 346                 _install_at(sname, application, injint)
 347
 348         types=win.get_uninstall()
 349
 350         for tname in types:
 351                 mime_type=mime.lookup(tname)
 352
 353                 sname=save_path(SITE, 'SendTo/.%s_%s' %  (mime_type.media,
 354                                                             mime_type.subtype),
 355                                           win.aname)
 356                 os.remove(sname)
 357
 358         win.destroy()
 359
 360 def install_from_appinfo(appdir = rox.app_dir, injint=None):
 361         """Read the AppInfo file from the AppDir and perform the installations
 362         indicated. The elements to use are <CanThumbnail> and <CanRun>, each containing
 363         a number of <MimeType type='...'/> elements.
 364         appdir - Path to application (defaults to current app)
 365         injint - Zero install injector interface, or None if none
 366         """
 367         import rox.AppInfo
 368
 369         app_info_path = os.path.join(appdir, 'AppInfo.xml')
 370         ainfo = rox.AppInfo.AppInfo(app_info_path)
 371
 372         can_run = ainfo.getCanRun()
 373         can_thumbnail = ainfo.getCanThumbnail()
 374         if can_run or can_thumbnail:
 375                 install_run_action(can_run, appdir, injint)
 376                 install_thumbnailer(can_thumbnail, appdir, injint)
 377                 install_send_to_types(can_run, appdir, injint)
 378         else:
 379                 raise Exception('Internal error: No actions found in %s. '
 380                                 'Check your namespaces!' % app_info_path)