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- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.5)
-
- '''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.
- '''
- from HyperParser import HyperParser
- from configHandler import idleConf
- _openers = {
- ')': '(',
- ']': '[',
- '}': '{' }
- CHECK_DELAY = 100
-
- 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:
- - 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 = [
- ('edit', [
- ('Show surrounding parens', '<<flash-paren>>')])]
- 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)
- RESTORE_VIRTUAL_EVENT_NAME = '<<parenmatch-check-restore>>'
- RESTORE_SEQUENCES = ('<KeyPress>', '<ButtonPress>', '<Key-Return>', '<Key-BackSpace>')
-
- def __init__(self, editwin):
- self.editwin = editwin
- self.text = editwin.text
- editwin.text.bind(self.RESTORE_VIRTUAL_EVENT_NAME, self.restore_event)
- self.counter = 0
- self.is_restore_active = 0
- self.set_style(self.STYLE)
-
-
- def activate_restore(self):
- if not self.is_restore_active:
- for seq in self.RESTORE_SEQUENCES:
- self.text.event_add(self.RESTORE_VIRTUAL_EVENT_NAME, seq)
-
- self.is_restore_active = True
-
-
-
- def deactivate_restore(self):
- if self.is_restore_active:
- for seq in self.RESTORE_SEQUENCES:
- self.text.event_delete(self.RESTORE_VIRTUAL_EVENT_NAME, seq)
-
- self.is_restore_active = False
-
-
-
- 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_paren_event(self, event):
- indices = HyperParser(self.editwin, 'insert').get_surrounding_brackets()
- if indices is None:
- self.warn_mismatched()
- return None
-
- self.activate_restore()
- self.create_tag(indices)
- self.set_timeout_last()
-
-
- def paren_closed_event(self, event):
- closer = self.text.get('insert-1c')
- if closer not in _openers:
- return None
-
- hp = HyperParser(self.editwin, 'insert-1c')
- if not hp.is_in_code():
- return None
-
- indices = hp.get_surrounding_brackets(_openers[closer], True)
- if indices is None:
- self.warn_mismatched()
- return None
-
- self.activate_restore()
- self.create_tag(indices)
- self.set_timeout()
-
-
- def restore_event(self, event = None):
- self.text.tag_delete('paren')
- self.deactivate_restore()
- self.counter += 1
-
-
- def handle_restore_timer(self, timer_count):
- if timer_count == self.counter:
- self.restore_event()
-
-
-
- def warn_mismatched(self):
- if self.BELL:
- self.text.bell()
-
-
-
- def create_tag_default(self, indices):
- '''Highlight the single paren that matches'''
- self.text.tag_add('paren', indices[0])
- self.text.tag_config('paren', self.HILITE_CONFIG)
-
-
- def create_tag_expression(self, indices):
- '''Highlight the entire expression'''
- if self.text.get(indices[1]) in (')', ']', '}'):
- rightindex = indices[1] + '+1c'
- else:
- rightindex = indices[1]
- self.text.tag_add('paren', indices[0], rightindex)
- self.text.tag_config('paren', self.HILITE_CONFIG)
-
-
- def set_timeout_none(self):
- '''Highlight will remain until user input turns it off
- or the insert has moved'''
- self.counter += 1
-
- def callme(callme, self = self, c = self.counter, index = self.text.index('insert')):
- if index != self.text.index('insert'):
- self.handle_restore_timer(c)
- else:
- self.editwin.text_frame.after(CHECK_DELAY, callme, callme)
-
- self.editwin.text_frame.after(CHECK_DELAY, callme, callme)
-
-
- def set_timeout_last(self):
- '''The last highlight created will be removed after .5 sec'''
- self.counter += 1
- self.editwin.text_frame.after(self.FLASH_DELAY, (lambda self = self, c = self.counter: self.handle_restore_timer(c)))
-
-
-