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Improvements to paren matching algorithm.

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This commit is contained in:
Charles Haley 2011-05-23 16:12:02 +01:00
parent 6ff2d3c346
commit e624da286e
1 changed files with 14 additions and 11 deletions
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25
src/calibre/gui2/dialogs/template_dialog.py
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@ -28,6 +28,7 @@ class TemplateHighlighter(QSyntaxHighlighter):
Config = {}
Rules = []
Formats = {}
BN_FACTOR = 1000
KEYWORDS = ["program"]
@ -95,10 +96,8 @@ class TemplateHighlighter(QSyntaxHighlighter):
self.Formats[name] = format
def find_paren(self, bn, pos):
for pp in self.paren_positions:
if pp.block == bn and pp.pos == pos:
return pp
return None
dex = bn * self.BN_FACTOR + pos
return self.paren_pos_map.get(dex, None)
def highlightBlock(self, text):
bn = self.currentBlock().blockNumber()
@ -127,24 +126,27 @@ class TemplateHighlighter(QSyntaxHighlighter):
if self.generate_paren_positions:
t = unicode(text)
i = 0
first = True
foundQuote = False
while i < len(t):
c = t[i]
if c == ':':
if first and i+1 < len(t) and t[i+1] == "'":
# Deal with the funky syntax of template program mode.
# This won't work if there are more than one template
# expression in the document.
if not foundQuote and i+1 < len(t) and t[i+1] == "'":
i += 2
elif c in ["'", '"']:
first = False
foundQuote = True
i += 1
j = t[i:].find(c)
if j < 0:
i = len(t)
else:
i = i + j
elif c == '(':
self.paren_positions.append(ParenPosition(bn, i, '('))
elif c == ')':
self.paren_positions.append(ParenPosition(bn, i, ')'))
elif c in ['(', ')']:
pp = ParenPosition(bn, i, c)
self.paren_positions.append(pp)
self.paren_pos_map[bn*self.BN_FACTOR+i] = pp
i += 1
def rehighlight(self):
@ -186,6 +188,7 @@ class TemplateHighlighter(QSyntaxHighlighter):
def regenerate_paren_positions(self):
self.generate_paren_positions = True
self.paren_positions = []
self.paren_pos_map = {}
self.rehighlight()
self.generate_paren_positions = False