170 lines
5.2 KiB
Python
170 lines
5.2 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# Copyright (C) 2018 Andy Stewart
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#
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# Author: MacKong <mackonghp@gmail.com>
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# Maintainer: MacKong <mackonghp@gmail.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from core.utils import get_clipboard_text, set_clipboard_text
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try:
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from qtconsole.kill_ring import QtKillRing
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except ImportError:
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""" A generic Emacs-style kill ring, as well as a Qt-specific version.
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Stolen from qtconsole.
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"""
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from PyQt5 import QtCore, QtWidgets, QtGui
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class KillRing(object):
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""" A generic Emacs-style kill ring.
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"""
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def __init__(self):
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self.clear()
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def clear(self):
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""" Clears the kill ring.
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"""
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self._index = -1
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self._ring = []
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def kill(self, text):
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""" Adds some killed text to the ring.
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"""
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self._ring.append(text)
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def yank(self):
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""" Yank back the most recently killed text.
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Returns
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-------
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A text string or None.
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"""
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self._index = len(self._ring)
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return self.rotate()
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def rotate(self):
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""" Rotate the kill ring, then yank back the new top.
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Returns
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-------
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A text string or None.
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"""
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self._index -= 1
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if self._index >= 0:
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return self._ring[self._index]
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return None
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class QtKillRing(QtCore.QObject):
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""" A kill ring attached to Q[Plain]TextEdit.
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"""
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#--------------------------------------------------------------------------
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# QtKillRing interface
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#--------------------------------------------------------------------------
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def __init__(self, text_edit):
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""" Create a kill ring attached to the specified Qt text edit.
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"""
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assert isinstance(text_edit, (QtWidgets.QTextEdit, QtWidgets.QPlainTextEdit))
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super(QtKillRing, self).__init__()
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self._ring = KillRing()
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self._prev_yank = None
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self._skip_cursor = False
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self._text_edit = text_edit
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text_edit.cursorPositionChanged.connect(self._cursor_position_changed)
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def clear(self):
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""" Clears the kill ring.
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"""
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self._ring.clear()
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self._prev_yank = None
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def kill(self, text):
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""" Adds some killed text to the ring.
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"""
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self._ring.kill(text)
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def kill_cursor(self, cursor):
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""" Kills the text selected by the give cursor.
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"""
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text = cursor.selectedText()
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if text:
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cursor.removeSelectedText()
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self.kill(text)
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def yank(self):
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""" Yank back the most recently killed text.
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"""
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text = self._ring.yank()
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if text:
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self._skip_cursor = True
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cursor = self._text_edit.textCursor()
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cursor.insertText(text)
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self._prev_yank = text
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def rotate(self):
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""" Rotate the kill ring, then yank back the new top.
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"""
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if self._prev_yank:
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text = self._ring.rotate()
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if text:
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self._skip_cursor = True
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cursor = self._text_edit.textCursor()
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cursor.movePosition(QtGui.QTextCursor.Left,
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QtGui.QTextCursor.KeepAnchor,
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n = len(self._prev_yank))
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cursor.insertText(text)
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self._prev_yank = text
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#--------------------------------------------------------------------------
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# Protected interface
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#--------------------------------------------------------------------------
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#------ Signal handlers ----------------------------------------------------
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def _cursor_position_changed(self):
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if self._skip_cursor:
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self._skip_cursor = False
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else:
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self._prev_yank = None
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class EafKillRing(QtKillRing):
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""" Kill ring suppport co-communication with system clipboard.
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"""
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def __init__(self, text_edit):
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""" Create a kill ring attached to the specified Qt text edit.
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"""
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super(EafKillRing, self).__init__(text_edit)
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def kill(self, text):
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super(EafKillRing, self).kill(text)
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set_clipboard_text(text)
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def yank(self):
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text = get_clipboard_text()
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self.kill(text)
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super(EafKillRing, self).yank()
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