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bpo-23667: IDLE: Add trailing space highlight #1602

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louisom wants to merge 1 commit into from
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bpo-23667: IDLE: Add trailing space highlight #1602

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24 changes: 19 additions & 5 deletions 24 Lib/idlelib/colorizer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,15 +20,16 @@ def make_pat():
# self.file = open("file") :
# 1st 'file' colorized normal, 2nd as builtin, 3rd as string
builtin = r"([^.'\"\\#]\b|^)" + any("BUILTIN", builtinlist) + r"\b"
trailing_space = any("TRAILINGSPACE", [r"[ \t]+(?=\n)"])
comment = any("COMMENT", [r"#[^\n]*"])
stringprefix = r"(?i:\br|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"])
return kw + "|" + builtin + "|" + trailing_space + "|" + comment +\
"|" + string + "|" + any("SYNC", [r"\n"])

prog = re.compile(make_pat(), re.S)
idprog = re.compile(r"\s+(\w+)", re.S)
Expand Down Expand Up @@ -56,6 +57,7 @@ class ColorDelegator(Delegator):

def __init__(self):
Delegator.__init__(self)
self.delay_render_trailing_space = None
self.prog = prog
self.idprog = idprog
self.LoadTagDefs()
Expand Down Expand Up @@ -90,6 +92,7 @@ def LoadTagDefs(self):
"SYNC": {'background':None,'foreground':None},
"TODO": {'background':None,'foreground':None},
"ERROR": idleConf.GetHighlight(theme, "error"),
"TRAILINGSPACE": idleConf.GetHighlight(theme, "error"),
# The following is used by ReplaceDialog:
"hit": idleConf.GetHighlight(theme, "hit"),
}
Expand Down Expand Up @@ -157,6 +160,9 @@ def toggle_colorize_event(self, event):

def recolorize(self):
self.after_id = None
if self.delay_render_trailing_space is not None:
self.after_cancel(self.delay_render_trailing_space)
self.delay_render_trailing_space = None
if not self.delegate:
if DEBUG: print("no delegate")
return
Expand Down Expand Up @@ -220,9 +226,17 @@ def recolorize_main(self):
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 key == "TRAILINGSPACE" and b - a == 1:
self.delay_render_trailing_space = self.after(
1000,
self.tag_add,
key,
head + "+%dc" % a,
head + "+%dc" % b)
else:
self.tag_add(key,
head + "+%dc" % a,
head + "+%dc" % b)
if value in ("def", "class"):
m1 = self.idprog.match(chars, b)
if m1:
Expand Down
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