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"""
This module contains the extended selection mode.
"""
from pyqode.qt import QtCore, QtWidgets, QtGui
from pyqode.core.api import Mode, TextHelper
class ExtendedSelectionMode(Mode):
""" Adds extended selection capabilities (Ctrl/Alt + Double click).
This mode adds extended selections capabilities to CodeEdit.
Extended selection is a feature that can be found in the Ulipad editor:
https://code.google.com/p/ulipad
It consists in adding a few shortcuts and contextual action to do some
smarter selections. This mode adds the following new kind of selections:
- word selection: select word under cursor
- extended word selection: select word under cursor including
continuation characters such as ".".
- matched selection: select text inside quotes or parenthesis
- line selection: select the whole line
- select all: select entire document
Extended selection and matched selection can be performed by combining
ctrl or alt with a double click (modifiers are configurable through
``extended_sel_modifier`` or ``matched_sel_modifier``).
"""
def __init__(self):
super(ExtendedSelectionMode, self).__init__()
self.extended_sel_modifier = QtCore.Qt.ControlModifier
self.matched_sel_modifier = QtCore.Qt.AltModifier
self.continuation_characters = ('.',)
self.word_sel_shortcut = QtGui.QKeySequence('Ctrl+Alt+M')
self.action_select_word = QtWidgets.QAction(self.editor)
self.action_select_word.setText(_('Select word'))
self.action_select_word.setShortcut(self.word_sel_shortcut)
self.action_select_word.triggered.connect(self.perform_word_selection)
self.action_select_word.setShortcutContext(
QtCore.Qt.WidgetShortcut)
self.extended_sel_shortcut = QtGui.QKeySequence('Ctrl+Shift+M')
self.action_select_extended_word = QtWidgets.QAction(self.editor)
self.action_select_extended_word.setText(_('Select extended word'))
self.action_select_extended_word.setShortcut(
self.extended_sel_shortcut)
self.action_select_extended_word.triggered.connect(
self.perform_extended_selection)
self.action_select_extended_word.setShortcutContext(
QtCore.Qt.WidgetShortcut)
self.matched_sel_shortcut = QtGui.QKeySequence('Ctrl+E')
self.action_select_matched = QtWidgets.QAction(self.editor)
self.action_select_matched.setText(_('Matched select'))
self.action_select_matched.setShortcut(self.matched_sel_shortcut)
self.action_select_matched.triggered.connect(
self.perform_matched_selection)
self.action_select_matched.setShortcutContext(
QtCore.Qt.WidgetShortcut)
self.line_sel_shortcut = QtGui.QKeySequence('Ctrl+Shift+L')
self.action_select_line = QtWidgets.QAction(self.editor)
self.action_select_line.setText(_('Select line'))
self.action_select_line.setShortcut(self.line_sel_shortcut)
self.action_select_line.triggered.connect(self.perform_line_selection)
self.action_select_line.setShortcutContext(
QtCore.Qt.WidgetShortcut)
def create_menu(self):
"""
Creates the extended selection menu.
"""
# setup menu
menu = QtWidgets.QMenu(self.editor)
menu.setTitle(_('Select'))
menu.menuAction().setIcon(QtGui.QIcon.fromTheme('edit-select'))
# setup actions
menu.addAction(self.action_select_word)
menu.addAction(self.action_select_extended_word)
menu.addAction(self.action_select_matched)
menu.addAction(self.action_select_line)
menu.addSeparator()
menu.addAction(self.editor.action_select_all)
icon = QtGui.QIcon.fromTheme(
'edit-select-all', QtGui.QIcon(
':/pyqode-icons/rc/edit-select-all.png'))
self.editor.action_select_all.setIcon(icon)
return menu
def on_install(self, editor):
super(ExtendedSelectionMode, self).on_install(editor)
try:
self.editor.remove_action(self.editor.action_select_all)
except (ValueError, AttributeError):
pass
self.editor.add_action(self.create_menu().menuAction())
self.editor.addActions([
self.action_select_extended_word, self.action_select_line,
self.action_select_matched, self.action_select_word])
def on_state_changed(self, state):
if state:
self.editor.mouse_double_clicked.connect(self._on_double_click)
else:
self.editor.mouse_double_clicked.disconnect(self._on_double_click)
def _on_double_click(self, event):
modifiers = event.modifiers()
if modifiers & self.extended_sel_modifier:
self.editor.textCursor().clearSelection()
self.perform_extended_selection(event=event)
elif modifiers & self.matched_sel_modifier:
# self.editor.textCursor().clearSelection()
self.perform_matched_selection(event=event)
elif int(modifiers) == QtCore.Qt.NoModifier:
self.perform_word_selection(event=event)
def perform_word_selection(self, event=None):
"""
Performs word selection
:param event: QMouseEvent
"""
self.editor.setTextCursor(
TextHelper(self.editor).word_under_cursor(True))
if event:
event.accept()
def perform_extended_selection(self, event=None):
"""
Performs extended word selection.
:param event: QMouseEvent
"""
TextHelper(self.editor).select_extended_word(
continuation_chars=self.continuation_characters)
if event:
event.accept()
def perform_matched_selection(self, event):
"""
Performs matched selection.
:param event: QMouseEvent
"""
selected = TextHelper(self.editor).match_select()
if selected and event:
event.accept()
def perform_line_selection(self):
"""
Performs line selection (select the entire line).
"""
TextHelper(self.editor).select_whole_line()
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