109 lines
3.3 KiB
Python
109 lines
3.3 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2014 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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"""Misc. widgets used at different places."""
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from PyQt5.QtCore import pyqtSlot
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from PyQt5.QtWidgets import QLineEdit
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from PyQt5.QtGui import QValidator
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from qutebrowser.models.cmdhistory import History
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class MinimalLineEditMixin:
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"""A mixin to give a QLineEdit a minimal look and nicer repr()."""
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def __init__(self):
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self.setStyleSheet("""
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QLineEdit {
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border: 0px;
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padding-left: 1px;
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background-color: transparent;
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}
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""")
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def __repr__(self):
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return '<{} "{}">'.format(self.__class__.__name__, self.text())
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class CommandLineEdit(QLineEdit):
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"""A QLineEdit with a history and prompt chars.
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Attributes:
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history: The command history object.
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_validator: The current command validator.
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_promptlen: The length of the current prompt.
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"""
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def __init__(self, parent=None):
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super().__init__(parent)
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self.history = History()
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self._validator = _CommandValidator(self)
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self.setValidator(self._validator)
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self.textEdited.connect(self.on_text_edited)
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self.cursorPositionChanged.connect(self.__on_cursor_position_changed)
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self._promptlen = 0
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@pyqtSlot(str)
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def on_text_edited(self, _text):
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"""Slot for textEdited. Stop history browsing."""
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self.history.stop()
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@pyqtSlot(int, int)
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def __on_cursor_position_changed(self, _old, new):
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"""Prevent the cursor moving to the prompt.
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We use __ here to avoid accidentally overriding it in superclasses.
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"""
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if new < self._promptlen:
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self.setCursorPosition(self._promptlen)
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def set_prompt(self, text):
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self._validator.prompt = text
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self._promptlen = len(text)
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def __repr__(self):
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return '<{} "{}">'.format(self.__class__.__name__, self.text())
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class _CommandValidator(QValidator):
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"""Validator to prevent the : from getting deleted."""
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def __init__(self, parent=None):
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super().__init__(parent)
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self.prompt = None
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def validate(self, string, pos):
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"""Override QValidator::validate.
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Args:
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string: The string to validate.
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pos: The current curser position.
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Return:
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A tuple (status, string, pos) as a QValidator should.
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"""
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if self.prompt is None or string.startswith(self.prompt):
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return (QValidator.Acceptable, string, pos)
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else:
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return (QValidator.Invalid, string, pos)
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