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idle_test	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
AutoComplete.py	8.99 KB	-rw-r--r--	2024-04-17 17:09
AutoCompleteWindow.py	17.32 KB	-rw-r--r--	2024-04-17 17:09
AutoExpand.py	3.32 KB	-rw-r--r--	2024-04-17 17:09
Bindings.py	2.97 KB	-rw-r--r--	2024-04-17 17:09
CREDITS.txt	1.82 KB	-rw-r--r--	2019-03-18 16:51
CallTipWindow.py	5.89 KB	-rw-r--r--	2024-04-17 17:09
CallTips.py	5.79 KB	-rw-r--r--	2024-04-17 17:09
ChangeLog	55.07 KB	-rw-r--r--	2019-03-18 16:51
ClassBrowser.py	6.83 KB	-rw-r--r--	2024-04-17 17:09
CodeContext.py	8.15 KB	-rw-r--r--	2024-04-17 17:09
ColorDelegator.py	9.47 KB	-rw-r--r--	2024-04-17 17:09
Debugger.py	18.32 KB	-rw-r--r--	2024-04-17 17:09
Delegator.py	665 B	-rw-r--r--	2024-04-17 17:09
EditorWindow.py	64.51 KB	-rw-r--r--	2024-04-17 17:09
FileList.py	3.72 KB	-rw-r--r--	2024-04-17 17:09
FormatParagraph.py	7.12 KB	-rw-r--r--	2024-04-17 17:09
GrepDialog.py	5 KB	-rw-r--r--	2024-04-17 17:09
HISTORY.txt	10.08 KB	-rw-r--r--	2019-03-18 16:51
HyperParser.py	12.58 KB	-rw-r--r--	2024-04-17 17:09
IOBinding.py	19.31 KB	-rw-r--r--	2024-04-17 17:09
IdleHistory.py	3.96 KB	-rw-r--r--	2024-04-17 17:09
MultiCall.py	18.14 KB	-rw-r--r--	2024-04-17 17:09
MultiStatusBar.py	1.32 KB	-rw-r--r--	2024-04-17 17:09
NEWS.txt	38.9 KB	-rw-r--r--	2019-03-18 16:51
ObjectBrowser.py	3.88 KB	-rw-r--r--	2024-04-17 17:09
OutputWindow.py	4.29 KB	-rw-r--r--	2024-04-17 17:09
ParenMatch.py	6.56 KB	-rw-r--r--	2024-04-17 17:09
PathBrowser.py	3.13 KB	-rw-r--r--	2024-04-17 17:09
Percolator.py	3.17 KB	-rw-r--r--	2024-04-17 17:09
PyParse.py	19.98 KB	-rw-r--r--	2024-04-17 17:09
PyShell.py	57.08 KB	-rwxr-xr-x	2024-04-17 17:09
README.txt	7.53 KB	-rw-r--r--	2019-03-18 16:51
RemoteDebugger.py	11.73 KB	-rw-r--r--	2024-04-17 17:09
RemoteObjectBrowser.py	964 B	-rw-r--r--	2024-04-17 17:09
ReplaceDialog.py	6.48 KB	-rw-r--r--	2024-04-17 17:09
RstripExtension.py	1.03 KB	-rw-r--r--	2024-04-17 17:09
ScriptBinding.py	7.87 KB	-rw-r--r--	2024-04-17 17:09
ScrolledList.py	4.27 KB	-rw-r--r--	2024-04-17 17:09
SearchDialog.py	2.57 KB	-rw-r--r--	2024-04-17 17:09
SearchDialogBase.py	6.84 KB	-rw-r--r--	2024-04-17 17:09
SearchEngine.py	7.31 KB	-rw-r--r--	2024-04-17 17:09
StackViewer.py	4.32 KB	-rw-r--r--	2024-04-17 17:09
TODO.txt	8.28 KB	-rw-r--r--	2019-03-18 16:51
ToolTip.py	3.1 KB	-rw-r--r--	2024-04-17 17:09
TreeWidget.py	14.67 KB	-rw-r--r--	2024-04-17 17:09
UndoDelegator.py	10.56 KB	-rw-r--r--	2024-04-17 17:09
WidgetRedirector.py	6.71 KB	-rw-r--r--	2024-04-17 17:09
WindowList.py	2.41 KB	-rw-r--r--	2024-04-17 17:09
ZoomHeight.py	1.27 KB	-rw-r--r--	2024-04-17 17:09
__init__.py	288 B	-rw-r--r--	2024-04-17 17:09
__main__.py	159 B	-rw-r--r--	2024-04-17 17:09
aboutDialog.py	6.53 KB	-rw-r--r--	2024-04-17 17:09
config-extensions.def	2.9 KB	-rw-r--r--	2019-03-18 16:51
config-highlight.def	2.46 KB	-rw-r--r--	2019-03-18 16:51
config-keys.def	7.59 KB	-rw-r--r--	2019-03-18 16:51
config-main.def	2.5 KB	-rw-r--r--	2019-03-18 16:51
configDialog.py	62.8 KB	-rw-r--r--	2024-04-17 17:09
configHandler.py	31.44 KB	-rw-r--r--	2024-04-17 17:09
configHelpSourceEdit.py	6.51 KB	-rw-r--r--	2024-04-17 17:09
configSectionNameDialog.py	3.91 KB	-rw-r--r--	2024-04-17 17:09
dynOptionMenuWidget.py	1.94 KB	-rw-r--r--	2024-04-17 17:09
extend.txt	3.56 KB	-rw-r--r--	2019-03-18 16:51
help.html	40.16 KB	-rw-r--r--	2019-03-18 16:51
help.py	9.47 KB	-rw-r--r--	2024-04-17 17:09
help.txt	17.48 KB	-rw-r--r--	2019-03-18 16:51
idle.py	400 B	-rw-r--r--	2024-04-17 17:09
idle.pyw	570 B	-rw-r--r--	2019-03-18 16:51
idlever.py	415 B	-rw-r--r--	2024-04-17 17:09
keybindingDialog.py	12.13 KB	-rw-r--r--	2024-04-17 17:09
macosxSupport.py	8.48 KB	-rw-r--r--	2024-04-17 17:09
rpc.py	20.29 KB	-rw-r--r--	2024-04-17 17:09
run.py	13.35 KB	-rw-r--r--	2024-04-17 17:09
tabbedpages.py	17.99 KB	-rw-r--r--	2024-04-17 17:09
textView.py	3.15 KB	-rw-r--r--	2024-04-17 17:09

Rename

"""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 idlelib.HyperParser import HyperParser
from idlelib.configHandler import idleConf

_openers = {')':'(',']':'[','}':'{'}
CHECK_DELAY = 100 # miliseconds

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>>"
    # We want the restore event be called before the usual return and
    # backspace events.
    RESTORE_SEQUENCES = ("<KeyPress>", "<ButtonPress>",
                         "<Key-Return>", "<Key-BackSpace>")

def __init__(self, editwin):
        self.editwin = editwin
        self.text = editwin.text
        # Bind the check-restore event to the function restore_event,
        # so that we can then use activate_restore (which calls event_add)
        # and deactivate_restore (which calls event_delete).
        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
        self.activate_restore()
        self.create_tag(indices)
        self.set_timeout_last()

def paren_closed_event(self, event):
        # If it was a shortcut and not really a closing paren, quit.
        closer = self.text.get("insert-1c")
        if closer not in _openers:
            return
        hp = HyperParser(self.editwin, "insert-1c")
        if not hp.is_in_code():
            return
        indices = hp.get_surrounding_brackets(_openers[closer], True)
        if indices is None:
            self.warn_mismatched()
            return
        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   # disable the last timer, if there is one.

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()

# any one of the create_tag_XXX methods can be used depending on
    # the style

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)

# any one of the set_timeout_XXX methods can be used depending on
    # the style

def set_timeout_none(self):
        """Highlight will remain until user input turns it off
        or the insert has moved"""
        # After CHECK_DELAY, call a function which disables the "paren" tag
        # if the event is for the most recent timer and the insert has changed,
        # or schedules another call for itself.
        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"""
        # associate a counter with an event; only disable the "paren"
        # tag if the event is for the most recent timer.
        self.counter += 1
        self.editwin.text_frame.after(
            self.FLASH_DELAY,
            lambda self=self, c=self.counter: self.handle_restore_timer(c))

if __name__ == '__main__':
    import unittest
    unittest.main('idlelib.idle_test.test_parenmatch', verbosity=2)