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"""
This module contains the occurrences highlighter mode.
"""
from pyqode.qt import QtGui
from pyqode.core.api import Mode, DelayJobRunner, TextHelper, TextDecoration
from pyqode.core.backend import NotRunning
from pyqode.core.backend.workers import findall
class OccurrencesHighlighterMode(Mode):
""" Highlights occurrences of the word under the text text cursor.
The ``delay`` before searching for occurrences is configurable.
"""
@property
def delay(self):
"""
Delay before searching for occurrences. The timer is rearmed as soon
as the cursor position changed.
"""
return self.timer.delay
@delay.setter
def delay(self, value):
self.timer.delay = value
if self.editor:
for clone in self.editor.clones:
try:
clone.modes.get(self.__class__).delay = value
except KeyError:
# this should never happen since we're working with clones
pass
@property
def background(self):
"""
Background or underline color (if underlined is True).
"""
return self._background
@background.setter
def background(self, value):
self._background = value
if self.editor:
for clone in self.editor.clones:
try:
clone.modes.get(self.__class__).background = value
except KeyError:
# this should never happen since we're working with clones
pass
@property
def foreground(self):
"""
Foreground color of occurences, not used if underlined is True.
"""
return self._foreground
@foreground.setter
def foreground(self, value):
self._foreground = value
if self.editor:
for clone in self.editor.clones:
try:
clone.modes.get(self.__class__).foreground = value
except KeyError:
# this should never happen since we're working with clones
pass
@property
def underlined(self):
"""
True to use to underlined occurrences instead of
changing the background. Default is True.
If this mode is ON, the foreground color is ignored, the
background color is then used as the underline color.
"""
return self._underlined
@underlined.setter
def underlined(self, value):
self._underlined = value
if self.editor:
for clone in self.editor.clones:
try:
clone.modes.get(self.__class__).underlined = value
except KeyError:
# this should never happen since we're working with clones
pass
@property
def case_sensitive(self):
return self._case_sensitive
@case_sensitive.setter
def case_sensitive(self, value):
self._case_sensitive = value
self._request_highlight()
def __init__(self):
super(OccurrencesHighlighterMode, self).__init__()
self._decorations = []
#: Timer used to run the search request with a specific delay
self.timer = DelayJobRunner(delay=1000)
self._sub = None
self._background = QtGui.QColor('#CCFFCC')
self._foreground = None
self._underlined = False
self._case_sensitive = False
def on_state_changed(self, state):
if state:
self.editor.cursorPositionChanged.connect(self._request_highlight)
else:
self.editor.cursorPositionChanged.disconnect(
self._request_highlight)
self.timer.cancel_requests()
def _clear_decos(self):
for d in self._decorations:
self.editor.decorations.remove(d)
self._decorations[:] = []
def _request_highlight(self):
if self.editor is not None:
sub = TextHelper(self.editor).word_under_cursor(
select_whole_word=True).selectedText()
if sub != self._sub:
self._clear_decos()
if len(sub) > 1:
self.timer.request_job(self._send_request)
def _send_request(self):
if self.editor is None:
return
cursor = self.editor.textCursor()
self._sub = TextHelper(self.editor).word_under_cursor(
select_whole_word=True).selectedText()
if not cursor.hasSelection() or cursor.selectedText() == self._sub:
request_data = {
'string': self.editor.toPlainText(),
'sub': self._sub,
'regex': False,
'whole_word': True,
'case_sensitive': self.case_sensitive
}
try:
self.editor.backend.send_request(findall, request_data,
self._on_results_available)
except NotRunning:
self._request_highlight()
def _on_results_available(self, results):
if len(results) > 500:
# limit number of results (on very big file where a lots of
# occurrences can be found, this would totally freeze the editor
# during a few seconds, with a limit of 500 we can make sure
# the editor will always remain responsive).
results = results[:500]
current = self.editor.textCursor().position()
if len(results) > 1:
for start, end in results:
if start <= current <= end:
continue
deco = TextDecoration(self.editor.textCursor(),
start_pos=start, end_pos=end)
if self.underlined:
deco.set_as_underlined(self._background)
else:
deco.set_background(QtGui.QBrush(self._background))
if self._foreground is not None:
deco.set_foreground(self._foreground)
deco.draw_order = 3
self.editor.decorations.append(deco)
self._decorations.append(deco)
def clone_settings(self, original):
self.delay = original.delay
self.background = original.background
self.foreground = original.foreground
self.underlined = original.underlined
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