home *** CD-ROM | disk | FTP | other *** search
- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.4)
-
- """ParenMatch -- An IDLE extension for parenthesis matching.
-
- When you hit a right paren, the cursor should move briefly to the left
- paren. Paren here is used generically; the matching applies to
- parentheses, square brackets, and curly braces.
-
- WARNING: This extension will fight with the CallTips extension,
- because they both are interested in the KeyRelease-parenright event.
- We'll have to fix IDLE to do something reasonable when two or more
- extensions what to capture the same event.
- """
- import PyParse
- from EditorWindow import EditorWindow, index2line
- from configHandler import idleConf
-
- class ParenMatch:
- """Highlight matching parentheses
-
- There are three supported style of paren matching, based loosely
- on the Emacs options. The style is select based on the
- HILITE_STYLE attribute; it can be changed used the set_style
- method.
-
- The supported styles are:
-
- default -- When a right paren is typed, highlight the matching
- left paren for 1/2 sec.
-
- expression -- When a right paren is typed, highlight the entire
- expression from the left paren to the right paren.
-
- TODO:
- - fix interaction with CallTips
- - extend IDLE with configuration dialog to change options
- - implement rest of Emacs highlight styles (see below)
- - print mismatch warning in IDLE status window
-
- Note: In Emacs, there are several styles of highlight where the
- matching paren is highlighted whenever the cursor is immediately
- to the right of a right paren. I don't know how to do that in Tk,
- so I haven't bothered.
- """
- menudefs = []
- STYLE = idleConf.GetOption('extensions', 'ParenMatch', 'style', default = 'expression')
- FLASH_DELAY = idleConf.GetOption('extensions', 'ParenMatch', 'flash-delay', type = 'int', default = 500)
- HILITE_CONFIG = idleConf.GetHighlight(idleConf.CurrentTheme(), 'hilite')
- BELL = idleConf.GetOption('extensions', 'ParenMatch', 'bell', type = 'bool', default = 1)
-
- def __init__(self, editwin):
- self.editwin = editwin
- self.text = editwin.text
- self.finder = LastOpenBracketFinder(editwin)
- self.counter = 0
- self._restore = None
- self.set_style(self.STYLE)
-
-
- def set_style(self, style):
- self.STYLE = style
- if style == 'default':
- self.create_tag = self.create_tag_default
- self.set_timeout = self.set_timeout_last
- elif style == 'expression':
- self.create_tag = self.create_tag_expression
- self.set_timeout = self.set_timeout_none
-
-
-
- def flash_open_paren_event(self, event):
- index = self.finder.find(keysym_type(event.keysym))
- if index is None:
- self.warn_mismatched()
- return None
-
- self._restore = 1
- self.create_tag(index)
- self.set_timeout()
-
-
- def check_restore_event(self, event = None):
- if self._restore:
- self.text.tag_delete('paren')
- self._restore = None
-
-
-
- def handle_restore_timer(self, timer_count):
- if timer_count + 1 == self.counter:
- self.check_restore_event()
-
-
-
- def warn_mismatched(self):
- if self.BELL:
- self.text.bell()
-
-
-
- def create_tag_default(self, index):
- '''Highlight the single paren that matches'''
- self.text.tag_add('paren', index)
- self.text.tag_config('paren', self.HILITE_CONFIG)
-
-
- def create_tag_expression(self, index):
- '''Highlight the entire expression'''
- self.text.tag_add('paren', index, 'insert')
- self.text.tag_config('paren', self.HILITE_CONFIG)
-
-
- def set_timeout_none(self):
- '''Highlight will remain until user input turns it off'''
- pass
-
-
- def set_timeout_last(self):
- '''The last highlight created will be removed after .5 sec'''
- self.editwin.text_frame.after(self.FLASH_DELAY, (lambda self = self, c = self.counter: self.handle_restore_timer(c)))
- self.counter = self.counter + 1
-
-
-
- def keysym_type(ks):
- if ks == 'parenright' or ks == '(':
- return 'paren'
-
- if ks == 'bracketright' or ks == '[':
- return 'bracket'
-
- if ks == 'braceright' or ks == '{':
- return 'brace'
-
-
-
- class LastOpenBracketFinder:
- num_context_lines = EditorWindow.num_context_lines
- indentwidth = EditorWindow.indentwidth
- tabwidth = EditorWindow.tabwidth
- context_use_ps1 = EditorWindow.context_use_ps1
-
- def __init__(self, editwin):
- self.editwin = editwin
- self.text = editwin.text
-
-
- def _find_offset_in_buf(self, lno):
- y = PyParse.Parser(self.indentwidth, self.tabwidth)
- for context in self.num_context_lines:
- startat = max(lno - context, 1)
- startatindex = repr(startat) + '.0'
- rawtext = self.text.get(startatindex, 'insert')[:-1] + '\n'
- y.set_str(rawtext)
- bod = y.find_good_parse_start(self.context_use_ps1, self._build_char_in_string_func(startatindex))
- if bod is not None or startat == 1:
- break
- continue
-
- if not bod:
- pass
- y.set_lo(0)
- i = y.get_last_open_bracket_pos()
- return (i, y.str)
-
-
- def find(self, right_keysym_type):
- '''Return the location of the last open paren'''
- lno = index2line(self.text.index('insert'))
- (i, buf) = self._find_offset_in_buf(lno)
- if i is None or keysym_type(buf[i]) != right_keysym_type:
- return None
-
- lines_back = buf[i:].count('\n') - 1
- upto_open = buf[:i]
- j = upto_open.rfind('\n') + 1
- offset = i - j
- return '%d.%d' % (lno - lines_back, offset)
-
-
- def _build_char_in_string_func(self, startindex):
-
- def inner(offset, startindex = startindex, icis = self.editwin.is_char_in_string):
- return icis(startindex + '%dc' % offset)
-
- return inner
-
-
-