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 configHandler 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     theme = idleConf.GetOption('main','Theme','name')
  57
  58     tagdefs = {
  59         "COMMENT": idleConf.GetHighlight(theme, "comment"),
  60         "KEYWORD": idleConf.GetHighlight(theme, "keyword"),
  61         "STRING": idleConf.GetHighlight(theme, "string"),
  62         "DEFINITION": idleConf.GetHighlight(theme, "definition"),
  63         "SYNC": idleConf.GetHighlight(theme, "sync"),
  64         "TODO": idleConf.GetHighlight(theme, "todo"),
  65         "BREAK": idleConf.GetHighlight(theme, "break"),
  66         # The following is used by ReplaceDialog:
  67         "hit": idleConf.GetHighlight(theme, "hit"),
  68         }
  69
  70     if DEBUG: print 'tagdefs',tagdefs
  71
  72     def insert(self, index, chars, tags=None):
  73         index = self.index(index)
  74         self.delegate.insert(index, chars, tags)
  75         self.notify_range(index, index + "+%dc" % len(chars))
  76
  77     def delete(self, index1, index2=None):
  78         index1 = self.index(index1)
  79         self.delegate.delete(index1, index2)
  80         self.notify_range(index1)
  81
  82     after_id = None
  83     allow_colorizing = 1
  84     colorizing = 0
  85
  86     def notify_range(self, index1, index2=None):
  87         self.tag_add("TODO", index1, index2)
  88         if self.after_id:
  89             if DEBUG: print "colorizing already scheduled"
  90             return
  91         if self.colorizing:
  92             self.stop_colorizing = 1
  93             if DEBUG: print "stop colorizing"
  94         if self.allow_colorizing:
  95             if DEBUG: print "schedule colorizing"
  96             self.after_id = self.after(1, self.recolorize)
  97
  98     close_when_done = None # Window to be closed when done colorizing
  99
 100     def close(self, close_when_done=None):
 101         if self.after_id:
 102             after_id = self.after_id
 103             self.after_id = None
 104             if DEBUG: print "cancel scheduled recolorizer"
 105             self.after_cancel(after_id)
 106         self.allow_colorizing = 0
 107         self.stop_colorizing = 1
 108         if close_when_done:
 109             if not self.colorizing:
 110                 close_when_done.destroy()
 111             else:
 112                 self.close_when_done = close_when_done
 113
 114     def toggle_colorize_event(self, event):
 115         if self.after_id:
 116             after_id = self.after_id
 117             self.after_id = None
 118             if DEBUG: print "cancel scheduled recolorizer"
 119             self.after_cancel(after_id)
 120         if self.allow_colorizing and self.colorizing:
 121             if DEBUG: print "stop colorizing"
 122             self.stop_colorizing = 1
 123         self.allow_colorizing = not self.allow_colorizing
 124         if self.allow_colorizing and not self.colorizing:
 125             self.after_id = self.after(1, self.recolorize)
 126         if DEBUG:
 127             print "auto colorizing turned", self.allow_colorizing and "on" or "off"
 128         return "break"
 129
 130     def recolorize(self):
 131         self.after_id = None
 132         if not self.delegate:
 133             if DEBUG: print "no delegate"
 134             return
 135         if not self.allow_colorizing:
 136             if DEBUG: print "auto colorizing is off"
 137             return
 138         if self.colorizing:
 139             if DEBUG: print "already colorizing"
 140             return
 141         try:
 142             self.stop_colorizing = 0
 143             self.colorizing = 1
 144             if DEBUG: print "colorizing..."
 145             t0 = time.clock()
 146             self.recolorize_main()
 147             t1 = time.clock()
 148             if DEBUG: print "%.3f seconds" % (t1-t0)
 149         finally:
 150             self.colorizing = 0
 151         if self.allow_colorizing and self.tag_nextrange("TODO", "1.0"):
 152             if DEBUG: print "reschedule colorizing"
 153             self.after_id = self.after(1, self.recolorize)
 154         if self.close_when_done:
 155             top = self.close_when_done
 156             self.close_when_done = None
 157             top.destroy()
 158
 159     def recolorize_main(self):
 160         next = "1.0"
 161         while 1:
 162             item = self.tag_nextrange("TODO", next)
 163             if not item:
 164                 break
 165             head, tail = item
 166             self.tag_remove("SYNC", head, tail)
 167             item = self.tag_prevrange("SYNC", head)
 168             if item:
 169                 head = item[1]
 170             else:
 171                 head = "1.0"
 172
 173             chars = ""
 174             next = head
 175             lines_to_get = 1
 176             ok = 0
 177             while not ok:
 178                 mark = next
 179                 next = self.index(mark + "+%d lines linestart" %
 180                                          lines_to_get)
 181                 lines_to_get = min(lines_to_get * 2, 100)
 182                 ok = "SYNC" in self.tag_names(next + "-1c")
 183                 line = self.get(mark, next)
 184                 ##print head, "get", mark, next, "->", `line`
 185                 if not line:
 186                     return
 187                 for tag in self.tagdefs.keys():
 188                     self.tag_remove(tag, mark, next)
 189                 chars = chars + line
 190                 m = self.prog.search(chars)
 191                 while m:
 192                     for key, value in m.groupdict().items():
 193                         if value:
 194                             a, b = m.span(key)
 195                             self.tag_add(key,
 196                                          head + "+%dc" % a,
 197                                          head + "+%dc" % b)
 198                             if value in ("def", "class"):
 199                                 m1 = self.idprog.match(chars, b)
 200                                 if m1:
 201                                     a, b = m1.span(1)
 202                                     self.tag_add("DEFINITION",
 203                                                  head + "+%dc" % a,
 204                                                  head + "+%dc" % b)
 205                             elif value == "import":
 206                                 # color all the "as" words on same line;
 207                                 # cheap approximation to the truth
 208                                 while 1:
 209                                     m1 = self.asprog.match(chars, b)
 210                                     if not m1:
 211                                         break
 212                                     a, b = m1.span(1)
 213                                     self.tag_add("KEYWORD",
 214                                                  head + "+%dc" % a,
 215                                                  head + "+%dc" % b)
 216                     m = self.prog.search(chars, m.end())
 217                 if "SYNC" in self.tag_names(next + "-1c"):
 218                     head = next
 219                     chars = ""
 220                 else:
 221                     ok = 0
 222                 if not ok:
 223                     # We're in an inconsistent state, and the call to
 224                     # update may tell us to stop.  It may also change
 225                     # the correct value for "next" (since this is a
 226                     # line.col string, not a true mark).  So leave a
 227                     # crumb telling the next invocation to resume here
 228                     # in case update tells us to leave.
 229                     self.tag_add("TODO", next)
 230                 self.update()
 231                 if self.stop_colorizing:
 232                     if DEBUG: print "colorizing stopped"
 233                     return
 234
 235
 236 def main():
 237     from Percolator import Percolator
 238     root = Tk()
 239     root.wm_protocol("WM_DELETE_WINDOW", root.quit)
 240     text = Text(background="white")
 241     text.pack(expand=1, fill="both")
 242     text.focus_set()
 243     p = Percolator(text)
 244     d = ColorDelegator()
 245     p.insertfilter(d)
 246     root.mainloop()
 247
 248 if __name__ == "__main__":
 249     main()