import builtins
import keyword
import re
import time
from idlelib.config import idleConf
from idlelib.delegator import Delegator
DEBUG = False
def any(name, alternates):
"Return a named group pattern matching list of alternates."
return "(?P<%s>" % name + "|".join(alternates) + ")"
def make_pat():
kw = r"\b" + any("KEYWORD", keyword.kwlist) + r"\b"
builtinlist = [str(name) for name in dir(builtins)
if not name.startswith('_') and \
name not in keyword.kwlist]
builtin = r"([^.'\"\\#]\b|^)" + any("BUILTIN", builtinlist) + r"\b"
comment = any("COMMENT", [r"#[^\n]*"])
stringprefix = r"(?i:r|u|f|fr|rf|b|br|rb)?"
sqstring = stringprefix + r"'[^'\\\n]*(\\.[^'\\\n]*)*'?"
dqstring = stringprefix + r'"[^"\\\n]*(\\.[^"\\\n]*)*"?'
sq3string = stringprefix + r"'''[^'\\]*((\\.|'(?!''))[^'\\]*)*(''')?"
dq3string = stringprefix + r'"""[^"\\]*((\\.|"(?!""))[^"\\]*)*(""")?'
string = any("STRING", [sq3string, dq3string, sqstring, dqstring])
return kw + "|" + builtin + "|" + comment + "|" + string +\
"|" + any("SYNC", [r"\n"])
prog = re.compile(make_pat(), re.S)
idprog = re.compile(r"\s+(\w+)", re.S)
def color_config(text):
"""Set color options of Text widget.
If ColorDelegator is used, this should be called first.
"""
# Called from htest, TextFrame, Editor, and Turtledemo.
# Not automatic because ColorDelegator does not know 'text'.
theme = idleConf.CurrentTheme()
normal_colors = idleConf.GetHighlight(theme, 'normal')
cursor_color = idleConf.GetHighlight(theme, 'cursor')['foreground']
select_colors = idleConf.GetHighlight(theme, 'hilite')
text.config(
foreground=normal_colors['foreground'],
background=normal_colors['background'],
insertbackground=cursor_color,
selectforeground=select_colors['foreground'],
selectbackground=select_colors['background'],
inactiveselectbackground=select_colors['background'], # new in 8.5
)
class ColorDelegator(Delegator):
"""Delegator for syntax highlighting (text coloring).
Instance variables:
delegate: Delegator below this one in the stack, meaning the
one this one delegates to.
Used to track state:
after_id: Identifier for scheduled after event, which is a
timer for colorizing the text.
allow_colorizing: Boolean toggle for applying colorizing.
colorizing: Boolean flag when colorizing is in process.
stop_colorizing: Boolean flag to end an active colorizing
process.
"""
def __init__(self):
Delegator.__init__(self)
self.init_state()
self.prog = prog
self.idprog = idprog
self.LoadTagDefs()
def init_state(self):
"Initialize variables that track colorizing state."
self.after_id = None
self.allow_colorizing = True
self.stop_colorizing = False
self.colorizing = False
def setdelegate(self, delegate):
"""Set the delegate for this instance.
A delegate is an instance of a Delegator class and each
delegate points to the next delegator in the stack. This
allows multiple delegators to be chained together for a
widget. The bottom delegate for a colorizer is a Text
widget.
If there is a delegate, also start the colorizing process.
"""
if self.delegate is not None:
self.unbind("<<toggle-auto-coloring>>")
Delegator.setdelegate(self, delegate)
if delegate is not None:
self.config_colors()
self.bind("<<toggle-auto-coloring>>", self.toggle_colorize_event)
self.notify_range("1.0", "end")
else:
# No delegate - stop any colorizing.
self.stop_colorizing = True
self.allow_colorizing = False
def config_colors(self):
"Configure text widget tags with colors from tagdefs."
for tag, cnf in self.tagdefs.items():
self.tag_configure(tag, **cnf)
self.tag_raise('sel')
def LoadTagDefs(self):
"Create dictionary of tag names to text colors."
theme = idleConf.CurrentTheme()
self.tagdefs = {
"COMMENT": idleConf.GetHighlight(theme, "comment"),
"KEYWORD": idleConf.GetHighlight(theme, "keyword"),
"BUILTIN": idleConf.GetHighlight(theme, "builtin"),
"STRING": idleConf.GetHighlight(theme, "string"),
"DEFINITION": idleConf.GetHighlight(theme, "definition"),
"SYNC": {'background':None,'foreground':None},
"TODO": {'background':None,'foreground':None},
"ERROR": idleConf.GetHighlight(theme, "error"),
# The following is used by ReplaceDialog:
"hit": idleConf.GetHighlight(theme, "hit"),
}
if DEBUG: print('tagdefs',self.tagdefs)
def insert(self, index, chars, tags=None):
"Insert chars into widget at index and mark for colorizing."
index = self.index(index)
self.delegate.insert(index, chars, tags)
self.notify_range(index, index + "+%dc" % len(chars))
def delete(self, index1, index2=None):
"Delete chars between indexes and mark for colorizing."
index1 = self.index(index1)
self.delegate.delete(index1, index2)
self.notify_range(index1)
def notify_range(self, index1, index2=None):
"Mark text changes for processing and restart colorizing, if active."
self.tag_add("TODO", index1, index2)
if self.after_id:
if DEBUG: print("colorizing already scheduled")
return
if self.colorizing:
self.stop_colorizing = True
if DEBUG: print("stop colorizing")
if self.allow_colorizing:
if DEBUG: print("schedule colorizing")
self.after_id = self.after(1, self.recolorize)
return
def close(self):
if self.after_id:
after_id = self.after_id
self.after_id = None
if DEBUG: print("cancel scheduled recolorizer")
self.after_cancel(after_id)
self.allow_colorizing = False
self.stop_colorizing = True
def toggle_colorize_event(self, event=None):
"""Toggle colorizing on and off.
When toggling off, if colorizing is scheduled or is in
process, it will be cancelled and/or stopped.
When toggling on, colorizing will be scheduled.
"""
if self.after_id:
after_id = self.after_id
self.after_id = None
if DEBUG: print("cancel scheduled recolorizer")
self.after_cancel(after_id)
if self.allow_colorizing and self.colorizing:
if DEBUG: print("stop colorizing")
self.stop_colorizing = True
self.allow_colorizing = not self.allow_colorizing
if self.allow_colorizing and not self.colorizing:
self.after_id = self.after(1, self.recolorize)
if DEBUG:
print("auto colorizing turned",\
self.allow_colorizing and "on" or "off")
return "break"
def recolorize(self):
"""Timer event (every 1ms) to colorize text.
Colorizing is only attempted when the text widget exists,
when colorizing is toggled on, and when the colorizing
process is not already running.
After colorizing is complete, some cleanup is done to
make sure that all the text has been colorized.
"""
self.after_id = None
if not self.delegate:
if DEBUG: print("no delegate")
return
if not self.allow_colorizing:
if DEBUG: print("auto colorizing is off")
return
if self.colorizing:
if DEBUG: print("already colorizing")
return
try:
self.stop_colorizing = False
self.colorizing = True
if DEBUG: print("colorizing...")
t0 = time.perf_counter()
self.recolorize_main()
t1 = time.perf_counter()
if DEBUG: print("%.3f seconds" % (t1-t0))
finally:
self.colorizing = False
if self.allow_colorizing and self.tag_nextrange("TODO", "1.0"):
if DEBUG: print("reschedule colorizing")
self.after_id = self.after(1, self.recolorize)
def recolorize_main(self):
"Evaluate text and apply colorizing tags."
next = "1.0"
while True:
item = self.tag_nextrange("TODO", next)
if not item:
break
head, tail = item
self.tag_remove("SYNC", head, tail)
item = self.tag_prevrange("SYNC", head)
if item:
head = item[1]
else:
head = "1.0"
chars = ""
next = head
lines_to_get = 1
ok = False
while not ok:
mark = next
next = self.index(mark + "+%d lines linestart" %
lines_to_get)
lines_to_get = min(lines_to_get * 2, 100)
ok = "SYNC" in self.tag_names(next + "-1c")
line = self.get(mark, next)
##print head, "get", mark, next, "->", repr(line)
if not line:
return
for tag in self.tagdefs:
self.tag_remove(tag, mark, next)
chars = chars + line
m = self.prog.search(chars)
while m:
for key, value in m.groupdict().items():
if value:
a, b = m.span(key)
self.tag_add(key,
head + "+%dc" % a,
head + "+%dc" % b)
if value in ("def", "class"):
m1 = self.idprog.match(chars, b)
if m1:
a, b = m1.span(1)
self.tag_add("DEFINITION",
head + "+%dc" % a,
head + "+%dc" % b)
m = self.prog.search(chars, m.end())
if "SYNC" in self.tag_names(next + "-1c"):
head = next
chars = ""
else:
ok = False
if not ok:
# We're in an inconsistent state, and the call to
# update may tell us to stop. It may also change
# the correct value for "next" (since this is a
# line.col string, not a true mark). So leave a
# crumb telling the next invocation to resume here
# in case update tells us to leave.
self.tag_add("TODO", next)
self.update()
if self.stop_colorizing:
if DEBUG: print("colorizing stopped")
return
def removecolors(self):
"Remove all colorizing tags."
for tag in self.tagdefs:
self.tag_remove(tag, "1.0", "end")
def _color_delegator(parent): # htest #
from tkinter import Toplevel, Text
from idlelib.percolator import Percolator
top = Toplevel(parent)
top.title("Test ColorDelegator")
x, y = map(int, parent.geometry().split('+')[1:])
top.geometry("700x250+%d+%d" % (x + 20, y + 175))
source = (
"if True: int ('1') # keyword, builtin, string, comment\n"
"elif False: print(0)\n"
"else: float(None)\n"
"if iF + If + IF: 'keyword matching must respect case'\n"
"if'': x or'' # valid string-keyword no-space combinations\n"
"async def f(): await g()\n"
"# All valid prefixes for unicode and byte strings should be colored.\n"
"'x', '''x''', \"x\", \"\"\"x\"\"\"\n"
"r'x', u'x', R'x', U'x', f'x', F'x'\n"
"fr'x', Fr'x', fR'x', FR'x', rf'x', rF'x', Rf'x', RF'x'\n"
"b'x',B'x', br'x',Br'x',bR'x',BR'x', rb'x', rB'x',Rb'x',RB'x'\n"
"# Invalid combinations of legal characters should be half colored.\n"
"ur'x', ru'x', uf'x', fu'x', UR'x', ufr'x', rfu'x', xf'x', fx'x'\n"
)
text = Text(top, background="white")
text.pack(expand=1, fill="both")
text.insert("insert", source)
text.focus_set()
color_config(text)
p = Percolator(text)
d = ColorDelegator()
p.insertfilter(d)
if __name__ == "__main__":
from unittest import main
main('idlelib.idle_test.test_colorizer', verbosity=2, exit=False)
from idlelib.idle_test.htest import run
run(_color_delegator)
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