Lib/idlelib/ColorDelegator.py

   1 import time
   2 import string
   3 import re
   4 import keyword
   5 from Tkinter import *
   6 from Delegator import Delegator
   7 from IdleConf import idleconf
   8
   9 #$ event <<toggle-auto-coloring>>
  10 #$ win <Control-slash>
  11 #$ unix <Control-slash>
  12
  13 DEBUG = 0
  14
  15
  16 def any(name, list):
  17     return "(?P<%s>" % name + string.join(list, "|") + ")"
  18
  19 def make_pat():
  20     kw = r"\b" + any("KEYWORD", keyword.kwlist) + r"\b"
  21     comment = any("COMMENT", [r"#[^\n]*"])
  22     sqstring = r"(\b[rR])?'[^'\\\n]*(\\.[^'\\\n]*)*'?"
  23     dqstring = r'(\b[rR])?"[^"\\\n]*(\\.[^"\\\n]*)*"?'
  24     sq3string = r"(\b[rR])?'''[^'\\]*((\\.|'(?!''))[^'\\]*)*(''')?"
  25     dq3string = r'(\b[rR])?"""[^"\\]*((\\.|"(?!""))[^"\\]*)*(""")?'
  26     string = any("STRING", [sq3string, dq3string, sqstring, dqstring])
  27     return kw + "|" + comment + "|" + string + "|" + any("SYNC", [r"\n"])
  28
  29 prog = re.compile(make_pat(), re.S)
  30 idprog = re.compile(r"\s+(\w+)", re.S)
  31 asprog = re.compile(r".*?\b(as)\b", re.S)
  32
  33 class ColorDelegator(Delegator):
  34
  35     def __init__(self):
  36         Delegator.__init__(self)
  37         self.prog = prog
  38         self.idprog = idprog
  39         self.asprog = asprog
  40
  41     def setdelegate(self, delegate):
  42         if self.delegate is not None:
  43             self.unbind("<<toggle-auto-coloring>>")
  44         Delegator.setdelegate(self, delegate)
  45         if delegate is not None:
  46             self.config_colors()
  47             self.bind("<<toggle-auto-coloring>>", self.toggle_colorize_event)
  48             self.notify_range("1.0", "end")
  49
  50     def config_colors(self):
  51         for tag, cnf in self.tagdefs.items():
  52             if cnf:
  53                 apply(self.tag_configure, (tag,), cnf)
  54         self.tag_raise('sel')
  55
  56     cconf = idleconf.getsection('Colors')
  57
  58     tagdefs = {
  59         "COMMENT": cconf.getcolor("comment"),
  60         "KEYWORD": cconf.getcolor("keyword"),
  61         "STRING": cconf.getcolor("string"),
  62         "DEFINITION": cconf.getcolor("definition"),
  63         "SYNC": cconf.getcolor("sync"),
  64         "TODO": cconf.getcolor("todo"),
  65         "BREAK": cconf.getcolor("break"),
  66         # The following is used by ReplaceDialog:
  67         "hit": cconf.getcolor("hit"),
  68         }
  69
  70     def insert(self, index, chars, tags=None):
  71         index = self.index(index)
  72         self.delegate.insert(index, chars, tags)
  73         self.notify_range(index, index + "+%dc" % len(chars))
  74
  75     def delete(self, index1, index2=None):
  76         index1 = self.index(index1)
  77         self.delegate.delete(index1, index2)
  78         self.notify_range(index1)
  79
  80     after_id = None
  81     allow_colorizing = 1
  82     colorizing = 0
  83
  84     def notify_range(self, index1, index2=None):
  85         self.tag_add("TODO", index1, index2)
  86         if self.after_id:
  87             if DEBUG: print "colorizing already scheduled"
  88             return
  89         if self.colorizing:
  90             self.stop_colorizing = 1
  91             if DEBUG: print "stop colorizing"
  92         if self.allow_colorizing:
  93             if DEBUG: print "schedule colorizing"
  94             self.after_id = self.after(1, self.recolorize)
  95
  96     close_when_done = None # Window to be closed when done colorizing
  97
  98     def close(self, close_when_done=None):
  99         if self.after_id:
 100             after_id = self.after_id
 101             self.after_id = None
 102             if DEBUG: print "cancel scheduled recolorizer"
 103             self.after_cancel(after_id)
 104         self.allow_colorizing = 0
 105         self.stop_colorizing = 1
 106         if close_when_done:
 107             if not self.colorizing:
 108                 close_when_done.destroy()
 109             else:
 110                 self.close_when_done = close_when_done
 111
 112     def toggle_colorize_event(self, event):
 113         if self.after_id:
 114             after_id = self.after_id
 115             self.after_id = None
 116             if DEBUG: print "cancel scheduled recolorizer"
 117             self.after_cancel(after_id)
 118         if self.allow_colorizing and self.colorizing:
 119             if DEBUG: print "stop colorizing"
 120             self.stop_colorizing = 1
 121         self.allow_colorizing = not self.allow_colorizing
 122         if self.allow_colorizing and not self.colorizing:
 123             self.after_id = self.after(1, self.recolorize)
 124         if DEBUG:
 125             print "auto colorizing turned", self.allow_colorizing and "on" or "off"
 126         return "break"
 127
 128     def recolorize(self):
 129         self.after_id = None
 130         if not self.delegate:
 131             if DEBUG: print "no delegate"
 132             return
 133         if not self.allow_colorizing:
 134             if DEBUG: print "auto colorizing is off"
 135             return
 136         if self.colorizing:
 137             if DEBUG: print "already colorizing"
 138             return
 139         try:
 140             self.stop_colorizing = 0
 141             self.colorizing = 1
 142             if DEBUG: print "colorizing..."
 143             t0 = time.clock()
 144             self.recolorize_main()
 145             t1 = time.clock()
 146             if DEBUG: print "%.3f seconds" % (t1-t0)
 147         finally:
 148             self.colorizing = 0
 149         if self.allow_colorizing and self.tag_nextrange("TODO", "1.0"):
 150             if DEBUG: print "reschedule colorizing"
 151             self.after_id = self.after(1, self.recolorize)
 152         if self.close_when_done:
 153             top = self.close_when_done
 154             self.close_when_done = None
 155             top.destroy()
 156
 157     def recolorize_main(self):
 158         next = "1.0"
 159         while 1:
 160             item = self.tag_nextrange("TODO", next)
 161             if not item:
 162                 break
 163             head, tail = item
 164             self.tag_remove("SYNC", head, tail)
 165             item = self.tag_prevrange("SYNC", head)
 166             if item:
 167                 head = item[1]
 168             else:
 169                 head = "1.0"
 170
 171             chars = ""
 172             next = head
 173             lines_to_get = 1
 174             ok = 0
 175             while not ok:
 176                 mark = next
 177                 next = self.index(mark + "+%d lines linestart" %
 178                                          lines_to_get)
 179                 lines_to_get = min(lines_to_get * 2, 100)
 180                 ok = "SYNC" in self.tag_names(next + "-1c")
 181                 line = self.get(mark, next)
 182                 ##print head, "get", mark, next, "->", `line`
 183                 if not line:
 184                     return
 185                 for tag in self.tagdefs.keys():
 186                     self.tag_remove(tag, mark, next)
 187                 chars = chars + line
 188                 m = self.prog.search(chars)
 189                 while m:
 190                     for key, value in m.groupdict().items():
 191                         if value:
 192                             a, b = m.span(key)
 193                             self.tag_add(key,
 194                                          head + "+%dc" % a,
 195                                          head + "+%dc" % b)
 196                             if value in ("def", "class"):
 197                                 m1 = self.idprog.match(chars, b)
 198                                 if m1:
 199                                     a, b = m1.span(1)
 200                                     self.tag_add("DEFINITION",
 201                                                  head + "+%dc" % a,
 202                                                  head + "+%dc" % b)
 203                             elif value == "import":
 204                                 # color all the "as" words on same line;
 205                                 # cheap approximation to the truth
 206                                 while 1:
 207                                     m1 = self.asprog.match(chars, b)
 208                                     if not m1:
 209                                         break
 210                                     a, b = m1.span(1)
 211                                     self.tag_add("KEYWORD",
 212                                                  head + "+%dc" % a,
 213                                                  head + "+%dc" % b)
 214                     m = self.prog.search(chars, m.end())
 215                 if "SYNC" in self.tag_names(next + "-1c"):
 216                     head = next
 217                     chars = ""
 218                 else:
 219                     ok = 0
 220                 if not ok:
 221                     # We're in an inconsistent state, and the call to
 222                     # update may tell us to stop.  It may also change
 223                     # the correct value for "next" (since this is a
 224                     # line.col string, not a true mark).  So leave a
 225                     # crumb telling the next invocation to resume here
 226                     # in case update tells us to leave.
 227                     self.tag_add("TODO", next)
 228                 self.update()
 229                 if self.stop_colorizing:
 230                     if DEBUG: print "colorizing stopped"
 231                     return
 232
 233
 234 def main():
 235     from Percolator import Percolator
 236     root = Tk()
 237     root.wm_protocol("WM_DELETE_WINDOW", root.quit)
 238     text = Text(background="white")
 239     text.pack(expand=1, fill="both")
 240     text.focus_set()
 241     p = Percolator(text)
 242     d = ColorDelegator()
 243     p.insertfilter(d)
 244     root.mainloop()
 245
 246 if __name__ == "__main__":
 247     main()