259 lines
8.5 KiB
Python
259 lines
8.5 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2014-2017 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
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#
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# This file is part of qutebrowser.
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#
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# qutebrowser 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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# (at your option) any later version.
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#
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# qutebrowser 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 qutebrowser. If not, see <http://www.gnu.org/licenses/>.
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"""Bridge to provide readline-like shortcuts for QLineEdits."""
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from PyQt5.QtWidgets import QApplication, QLineEdit
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from qutebrowser.commands import cmdutils
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from qutebrowser.utils import usertypes as typ
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from qutebrowser.utils import utils
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class ReadlineBridge:
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"""Bridge which provides readline-like commands for the current QLineEdit.
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Attributes:
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_deleted: Mapping from widgets to their last deleted text.
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"""
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def __init__(self):
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self._deleted = {}
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def __repr__(self):
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return utils.get_repr(self)
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def _widget(self):
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"""Get the currently active QLineEdit."""
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w = QApplication.instance().focusWidget()
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if isinstance(w, QLineEdit):
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return w
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else:
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return None
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_backward_char(self):
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"""Move back a character.
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This acts like readline's backward-char.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.cursorBackward(False)
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_forward_char(self):
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"""Move forward a character.
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This acts like readline's forward-char.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.cursorForward(False)
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_backward_word(self):
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"""Move back to the start of the current or previous word.
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This acts like readline's backward-word.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.cursorWordBackward(False)
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_forward_word(self):
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"""Move forward to the end of the next word.
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This acts like readline's forward-word.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.cursorWordForward(False)
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_beginning_of_line(self):
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"""Move to the start of the line.
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This acts like readline's beginning-of-line.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.home(False)
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_end_of_line(self):
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"""Move to the end of the line.
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This acts like readline's end-of-line.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.end(False)
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_unix_line_discard(self):
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"""Remove chars backward from the cursor to the beginning of the line.
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This acts like readline's unix-line-discard.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.home(True)
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self._deleted[widget] = widget.selectedText()
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widget.del_()
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_kill_line(self):
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"""Remove chars from the cursor to the end of the line.
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This acts like readline's kill-line.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.end(True)
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self._deleted[widget] = widget.selectedText()
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widget.del_()
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def _rubout(self, delim):
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"""Delete backwards using the characters in delim as boundaries."""
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widget = self._widget()
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if widget is None:
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return
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cursor_position = widget.cursorPosition()
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text = widget.text()
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target_position = cursor_position
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is_boundary = True
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while is_boundary and target_position > 0:
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is_boundary = text[target_position - 1] in delim
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target_position -= 1
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is_boundary = False
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while not is_boundary and target_position > 0:
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is_boundary = text[target_position - 1] in delim
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target_position -= 1
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moveby = cursor_position - target_position - 1
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widget.cursorBackward(True, moveby)
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self._deleted[widget] = widget.selectedText()
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widget.del_()
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_unix_word_rubout(self):
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"""Remove chars from the cursor to the beginning of the word.
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This acts like readline's unix-word-rubout. Whitespace is used as a
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word delimiter.
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"""
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self._rubout([' '])
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_unix_filename_rubout(self):
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"""Remove chars from the cursor to the previous path separator.
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This acts like readline's unix-filename-rubout.
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"""
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self._rubout([' ', '/'])
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_backward_kill_word(self):
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"""Remove chars from the cursor to the beginning of the word.
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This acts like readline's backward-kill-word. Any non-alphanumeric
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character is considered a word delimiter.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.cursorWordBackward(True)
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self._deleted[widget] = widget.selectedText()
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widget.del_()
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_kill_word(self):
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"""Remove chars from the cursor to the end of the current word.
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This acts like readline's kill-word.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.cursorWordForward(True)
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self._deleted[widget] = widget.selectedText()
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widget.del_()
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_yank(self):
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"""Paste the most recently deleted text.
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This acts like readline's yank.
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"""
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widget = self._widget()
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if widget is None or widget not in self._deleted:
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return
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widget.insert(self._deleted[widget])
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_delete_char(self):
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"""Delete the character after the cursor.
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This acts like readline's delete-char.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.del_()
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@cmdutils.register(instance='readline-bridge', hide=True,
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modes=[typ.KeyMode.command, typ.KeyMode.prompt])
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def rl_backward_delete_char(self):
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"""Delete the character before the cursor.
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This acts like readline's backward-delete-char.
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"""
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widget = self._widget()
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if widget is None:
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return
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widget.backspace()
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