727 lines
26 KiB
Python
727 lines
26 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2016 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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"""Showing prompts above the statusbar."""
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import os.path
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import html
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import collections
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import sip
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from PyQt5.QtCore import (pyqtSlot, pyqtSignal, Qt, QTimer, QDir, QModelIndex,
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QItemSelectionModel)
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from PyQt5.QtWidgets import (QWidget, QGridLayout, QVBoxLayout, QLineEdit,
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QLabel, QWidgetItem, QFileSystemModel, QTreeView,
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QSizePolicy)
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from qutebrowser.config import style
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from qutebrowser.utils import usertypes, log, utils, qtutils, objreg
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from qutebrowser.keyinput import modeman
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from qutebrowser.commands import cmdutils, cmdexc
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AuthTuple = collections.namedtuple('AuthTuple', ['user', 'password'])
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class Error(Exception):
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"""Base class for errors in this module."""
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class UnsupportedOperationError(Exception):
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"""Raised when the prompt class doesn't support the requested operation."""
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class PromptContainer(QWidget):
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"""Container for prompts to be shown above the statusbar.
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The way in which multiple questions are handled deserves some explanation.
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If a question is blocking, we *need* to ask it immediately, and can't wait
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for previous questions to finish. We could theoretically ask a blocking
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question inside of another blocking one, so in ask_question we simply save
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the current prompt state on the stack, let the user answer the *most
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recent* question, and then restore the previous state.
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With a non-blocking question, things are a bit easier. We simply add it to
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self._queue if we're still busy handling another question, since it can be
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answered at any time.
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In either case, as soon as we finished handling a question, we call
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_pop_later() which schedules a _pop to ask the next question in _queue. We
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schedule it rather than doing it immediately because then the order of how
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things happen is clear, e.g. on_mode_left can't happen after we already set
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up the *new* question.
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Attributes:
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_shutting_down: Whether we're currently shutting down the prompter and
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should ignore future questions to avoid segfaults.
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_loops: A list of local EventLoops to spin in when blocking.
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_queue: A deque of waiting questions.
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_prompt: The current prompt object if we're handling a question.
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_layout: The layout used to show prompts in.
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_win_id: The window ID this object is associated with.
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"""
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STYLESHEET = """
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{% set prompt_radius = config.get('ui', 'prompt-radius') %}
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QWidget#Prompt {
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{% if config.get('ui', 'status-position') == 'top' %}
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border-bottom-left-radius: {{ prompt_radius }}px;
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border-bottom-right-radius: {{ prompt_radius }}px;
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{% else %}
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border-top-left-radius: {{ prompt_radius }}px;
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border-top-right-radius: {{ prompt_radius }}px;
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{% endif %}
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}
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QWidget {
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font: {{ font['prompts'] }};
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color: {{ color['prompts.fg'] }};
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background-color: {{ color['prompts.bg'] }};
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}
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"""
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update_geometry = pyqtSignal()
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def __init__(self, win_id, parent=None):
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super().__init__(parent)
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self._layout = QVBoxLayout(self)
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self._layout.setContentsMargins(10, 10, 10, 10)
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self._prompt = None
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self._shutting_down = False
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self._loops = []
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self._queue = collections.deque()
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self._win_id = win_id
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self.setObjectName('Prompt')
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self.setAttribute(Qt.WA_StyledBackground, True)
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style.set_register_stylesheet(self)
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def __repr__(self):
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return utils.get_repr(self, loops=len(self._loops),
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queue=len(self._queue), prompt=self._prompt)
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def _pop_later(self):
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"""Helper to call self._pop as soon as everything else is done."""
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QTimer.singleShot(0, self._pop)
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def _pop(self):
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"""Pop a question from the queue and ask it, if there are any."""
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log.prompt.debug("Popping from queue {}".format(self._queue))
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if self._queue:
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question = self._queue.popleft()
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if not sip.isdeleted(question):
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# the question could already be deleted, e.g. by a cancelled
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# download. See
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# https://github.com/The-Compiler/qutebrowser/issues/415
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self.ask_question(question, blocking=False)
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def _show_prompt(self, prompt):
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"""SHow the given prompt object.
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Args:
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prompt: A Prompt object or None.
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Return: True if a prompt was shown, False otherwise.
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"""
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# Before we set a new prompt, make sure the old one is what we expect
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# This will also work if self._prompt is None and verify nothing is
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# displayed.
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#
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# Note that we don't delete the old prompt here, as we might be in the
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# middle of saving/restoring an old prompt object.
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assert self._layout.count() in [0, 1], self._layout.count()
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item = self._layout.takeAt(0)
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if item is None:
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assert self._prompt is None, self._prompt
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else:
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if (not isinstance(item, QWidgetItem) or
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item.widget() is not self._prompt):
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raise AssertionError("Expected {} to be in layout but got "
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"{}!".format(self._prompt, item))
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item.widget().hide()
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log.prompt.debug("Displaying prompt {}".format(prompt))
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self._prompt = prompt
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if prompt is None:
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self.hide()
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return False
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prompt.question.aborted.connect(
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lambda: modeman.maybe_leave(self._win_id, prompt.KEY_MODE,
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'aborted'))
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modeman.enter(self._win_id, prompt.KEY_MODE, 'question asked')
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self._prompt = prompt
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self.setSizePolicy(self._prompt.sizePolicy())
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self._layout.addWidget(self._prompt)
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self._prompt.show()
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self.show()
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self._prompt.setFocus()
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self.update_geometry.emit()
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return True
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def shutdown(self):
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"""Cancel all blocking questions.
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Quits and removes all running event loops.
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Return:
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True if loops needed to be aborted,
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False otherwise.
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"""
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self._shutting_down = True
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if self._loops:
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for loop in self._loops:
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loop.quit()
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loop.deleteLater()
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return True
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else:
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return False
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@cmdutils.register(instance='prompt-container', hide=True, scope='window',
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modes=[usertypes.KeyMode.prompt,
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usertypes.KeyMode.yesno])
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def prompt_accept(self, value=None):
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"""Accept the current prompt.
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//
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This executes the next action depending on the question mode, e.g. asks
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for the password or leaves the mode.
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Args:
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value: If given, uses this value instead of the entered one.
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For boolean prompts, "yes"/"no" are accepted as value.
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"""
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try:
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done = self._prompt.accept(value)
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except Error as e:
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raise cmdexc.CommandError(str(e))
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if done:
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key_mode = self._prompt.KEY_MODE
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self._prompt.question.done()
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modeman.maybe_leave(self._win_id, key_mode, ':prompt-accept')
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@cmdutils.register(instance='prompt-container', hide=True, scope='window',
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modes=[usertypes.KeyMode.yesno],
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deprecated='Use :prompt-accept yes instead!')
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def prompt_yes(self):
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"""Answer yes to a yes/no prompt."""
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self.prompt_accept('yes')
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@cmdutils.register(instance='prompt-container', hide=True, scope='window',
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modes=[usertypes.KeyMode.yesno],
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deprecated='Use :prompt-accept no instead!')
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def prompt_no(self):
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"""Answer no to a yes/no prompt."""
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self.prompt_accept('no')
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@pyqtSlot(usertypes.KeyMode)
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def on_mode_left(self, mode):
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"""Clear and reset input when the mode was left."""
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# FIXME when is this not the case?
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if (self._prompt is not None and
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mode == self._prompt.KEY_MODE):
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question = self._prompt.question
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self._show_prompt(None)
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# FIXME move this somewhere else?
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if question.answer is None and not question.is_aborted:
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question.cancel()
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@cmdutils.register(instance='prompt-container', hide=True, scope='window',
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modes=[usertypes.KeyMode.prompt], maxsplit=0)
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def prompt_open_download(self, cmdline: str=None):
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"""Immediately open a download.
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If no specific command is given, this will use the system's default
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application to open the file.
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Args:
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cmdline: The command which should be used to open the file. A `{}`
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is expanded to the temporary file name. If no `{}` is
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present, the filename is automatically appended to the
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cmdline.
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"""
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try:
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self._prompt.download_open(cmdline)
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except UnsupportedOperationError:
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pass
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@cmdutils.register(instance='prompt-container', hide=True, scope='window',
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modes=[usertypes.KeyMode.prompt])
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@cmdutils.argument('which', choices=['next', 'prev'])
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def prompt_item_focus(self, which):
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"""Shift the focus of the prompt file completion menu to another item.
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Args:
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which: 'next', 'prev'
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"""
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try:
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self._prompt.item_focus(which)
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except UnsupportedOperationError:
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pass
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@pyqtSlot(usertypes.Question, bool)
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def ask_question(self, question, blocking):
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"""Display a prompt for a given question.
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Args:
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question: The Question object to ask.
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blocking: If True, this function blocks and returns the result.
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Return:
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The answer of the user when blocking=True.
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None if blocking=False.
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"""
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log.prompt.debug("Asking question {}, blocking {}, loops {}, queue "
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"{}".format(question, blocking, self._loops,
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self._queue))
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if self._shutting_down:
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# If we're currently shutting down we have to ignore this question
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# to avoid segfaults - see
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# https://github.com/The-Compiler/qutebrowser/issues/95
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log.prompt.debug("Ignoring question because we're shutting down.")
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question.abort()
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return None
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if self._prompt is not None and not blocking:
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# We got an async question, but we're already busy with one, so we
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# just queue it up for later.
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log.prompt.debug("Adding {} to queue.".format(question))
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self._queue.append(question)
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return
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if blocking:
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# If we're blocking we save the old state on the stack, so we can
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# restore it after exec, if exec gets called multiple times.
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old_prompt = self._prompt
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classes = {
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usertypes.PromptMode.yesno: YesNoPrompt,
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usertypes.PromptMode.text: LineEditPrompt,
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usertypes.PromptMode.user_pwd: AuthenticationPrompt,
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usertypes.PromptMode.download: DownloadFilenamePrompt,
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usertypes.PromptMode.alert: AlertPrompt,
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}
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klass = classes[question.mode]
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self._show_prompt(klass(question, self._win_id))
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if blocking:
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loop = qtutils.EventLoop()
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self._loops.append(loop)
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loop.destroyed.connect(lambda: self._loops.remove(loop))
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question.completed.connect(loop.quit)
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question.completed.connect(loop.deleteLater)
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loop.exec_()
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# FIXME don't we end up connecting modeman signals twice here now?
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if not self._show_prompt(old_prompt):
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# Nothing left to restore, so we can go back to popping async
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# questions.
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if self._queue:
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self._pop_later()
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return question.answer
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else:
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question.completed.connect(self._pop_later)
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class LineEdit(QLineEdit):
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"""A line edit used in prompts."""
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def __init__(self, parent=None):
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super().__init__(parent)
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self.setStyleSheet("""
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QLineEdit {
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border: 1px solid grey;
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background-color: transparent;
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}
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""")
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self.setAttribute(Qt.WA_MacShowFocusRect, False)
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def keyPressEvent(self, e):
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"""Override keyPressEvent to paste primary selection on Shift + Ins."""
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if e.key() == Qt.Key_Insert and e.modifiers() == Qt.ShiftModifier:
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try:
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text = utils.get_clipboard(selection=True)
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except utils.ClipboardError:
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pass
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else:
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e.accept()
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self.insert(text)
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return
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super().keyPressEvent(e)
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def __repr__(self):
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return utils.get_repr(self)
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class _BasePrompt(QWidget):
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"""Base class for all prompts."""
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KEY_MODE = usertypes.KeyMode.prompt
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def __init__(self, question, win_id, parent=None):
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super().__init__(parent)
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self.question = question
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self._win_id = win_id
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self._vbox = QVBoxLayout(self)
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self._vbox.setSpacing(15)
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self._key_grid = None
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self._key_grid_item = None
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def __repr__(self):
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return utils.get_repr(self, question=self.question, constructor=True)
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def _init_title(self, question):
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assert question.title is not None, question
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title_label = QLabel('<b>{}</b>'.format(question.title), self)
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self._vbox.addWidget(title_label)
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if question.text is not None:
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text_label = QLabel(question.text)
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self._vbox.addWidget(text_label)
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def _init_key_label(self):
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# Remove old grid
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if self._key_grid is not None:
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self._vbox.removeItem(self._key_grid_item)
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self._key_grid = QGridLayout()
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self._key_grid.setVerticalSpacing(0)
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key_config = objreg.get('key-config')
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# The bindings are all in the 'prompt' mode, even for yesno prompts
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all_bindings = key_config.get_reverse_bindings_for('prompt')
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labels = []
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for cmd, text in self._allowed_commands():
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bindings = all_bindings.get(cmd, [])
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if bindings:
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binding = None
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preferred = ['<enter>', '<escape>']
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for pref in preferred:
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if pref in bindings:
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binding = pref
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if binding is None:
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binding = bindings[0]
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key_label = QLabel('<b>{}</b>'.format(html.escape(binding)))
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text_label = QLabel(text)
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labels.append((key_label, text_label))
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for i, (key_label, text_label) in enumerate(labels):
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self._key_grid.addWidget(key_label, i, 0)
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self._key_grid.addWidget(text_label, i, 1)
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self._vbox.addLayout(self._key_grid)
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self._key_grid_item = self._vbox.itemAt(self._vbox.count() - 1)
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def accept(self, value=None):
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raise NotImplementedError
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def download_open(self, _cmdline):
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"""Open the download directly if this is a download prompt."""
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raise UnsupportedOperationError
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def item_focus(self, _which):
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"""Switch to next file item if this is a filename prompt.."""
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raise UnsupportedOperationError
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def _allowed_commands(self):
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"""Get the commands we could run as response to this message."""
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raise NotImplementedError
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class LineEditPrompt(_BasePrompt):
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"""A prompt for a single text value."""
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def __init__(self, question, win_id, parent=None):
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super().__init__(question, win_id, parent)
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self._lineedit = LineEdit(self)
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self._init_title(question)
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self._vbox.addWidget(self._lineedit)
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if question.default:
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self._lineedit.setText(question.default)
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self.setFocusProxy(self._lineedit)
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self._init_key_label()
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def accept(self, value=None):
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text = value if value is not None else self._lineedit.text()
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self.question.answer = text
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return True
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def _allowed_commands(self):
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"""Get the commands we could run as response to this message."""
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return [('prompt-accept', 'Accept'), ('leave-mode', 'Abort')]
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class FilenamePrompt(_BasePrompt):
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"""A prompt for a filename."""
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def __init__(self, question, win_id, parent=None):
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super().__init__(question, win_id, parent)
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self._init_title(question)
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self._init_fileview()
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self._set_fileview_root(question.default)
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self._lineedit = LineEdit(self)
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self._lineedit.textChanged.connect(self._set_fileview_root)
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self._vbox.addWidget(self._lineedit)
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if question.default:
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self._lineedit.setText(question.default)
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self.setFocusProxy(self._lineedit)
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self._init_key_label()
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self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
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@pyqtSlot(str)
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def _set_fileview_root(self, path):
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"""Set the root path for the file display."""
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if not path.endswith('/') or path == '/':
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return
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path.rstrip('/')
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try:
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if os.path.isdir(path):
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path = path
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elif os.path.isdir(os.path.basename(path)):
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path = os.path.basename(path)
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else:
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path = None
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except OSError:
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path = None
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if path is None:
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return
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root = self._file_model.setRootPath(path)
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self._file_view.setRootIndex(root)
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@pyqtSlot(QModelIndex)
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def _insert_path(self, index, *, clicked=True):
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"""Handle an element selection.
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Args:
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index: The QModelIndex of the selected element.
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clicked: Whether the element was clicked.
|
|
"""
|
|
parts = []
|
|
cur = index
|
|
while cur.isValid():
|
|
parts.append(cur.data())
|
|
cur = cur.parent()
|
|
path = os.path.normpath(os.path.join(*reversed(parts)))
|
|
if clicked:
|
|
path += os.sep
|
|
log.prompt.debug('Clicked {!r} -> {}'.format(parts, path))
|
|
self._lineedit.setText(path)
|
|
self._lineedit.setFocus()
|
|
if clicked:
|
|
# Avoid having a ..-subtree highlighted
|
|
self._file_view.setCurrentIndex(QModelIndex())
|
|
|
|
def _init_fileview(self):
|
|
self._file_view = QTreeView(self)
|
|
self._file_model = QFileSystemModel(self)
|
|
self._file_view.setModel(self._file_model)
|
|
self._file_view.clicked.connect(self._insert_path)
|
|
self._vbox.addWidget(self._file_view)
|
|
# Only show name
|
|
self._file_view.setHeaderHidden(True)
|
|
for col in range(1, 4):
|
|
self._file_view.setColumnHidden(col, True)
|
|
|
|
def accept(self, value=None):
|
|
text = value if value is not None else self._lineedit.text()
|
|
self.question.answer = text
|
|
return True
|
|
|
|
def item_focus(self, which):
|
|
# This duplicates some completion code, but I don't see a nicer way...
|
|
assert which in ['prev', 'next'], which
|
|
selmodel = self._file_view.selectionModel()
|
|
|
|
first_index = self._file_model.index(0, 0)
|
|
last_index = self._file_model.index(self._file_model.rowCount() - 1, 0)
|
|
|
|
idx = selmodel.currentIndex()
|
|
if not idx.isValid():
|
|
# No item selected yet
|
|
idx = last_index if which == 'prev' else first_index
|
|
|
|
if which == 'prev':
|
|
idx = self._file_view.indexAbove(idx)
|
|
else:
|
|
idx = self._file_view.indexBelow(idx)
|
|
# wrap around if we arrived at beginning/end
|
|
if not idx.isValid():
|
|
idx = last_index if which == 'prev' else first_index
|
|
|
|
selmodel.setCurrentIndex(
|
|
idx, QItemSelectionModel.ClearAndSelect | QItemSelectionModel.Rows)
|
|
self._insert_path(idx, clicked=False)
|
|
|
|
def _allowed_commands(self):
|
|
"""Get the commands we could run as response to this message."""
|
|
return [('prompt-accept', 'Accept'), ('leave-mode', 'Abort')]
|
|
|
|
|
|
class DownloadFilenamePrompt(FilenamePrompt):
|
|
|
|
"""A prompt for a filename for downloads."""
|
|
|
|
def __init__(self, question, win_id, parent=None):
|
|
super().__init__(question, win_id, parent)
|
|
self._file_model.setFilter(QDir.AllDirs | QDir.Drives | QDir.NoDot)
|
|
|
|
def accept(self, value=None):
|
|
text = value if value is not None else self._lineedit.text()
|
|
self.question.answer = usertypes.FileDownloadTarget(text)
|
|
return True
|
|
|
|
def download_open(self, cmdline):
|
|
self.question.answer = usertypes.OpenFileDownloadTarget(cmdline)
|
|
modeman.maybe_leave(self._win_id, usertypes.KeyMode.prompt,
|
|
'download open')
|
|
self.question.done()
|
|
|
|
def _allowed_commands(self):
|
|
cmds = [
|
|
('prompt-accept', 'Accept'),
|
|
('leave-mode', 'Abort'),
|
|
('prompt-open-download', "Open download"),
|
|
]
|
|
return cmds
|
|
|
|
|
|
class AuthenticationPrompt(_BasePrompt):
|
|
|
|
"""A prompt for username/password."""
|
|
|
|
def __init__(self, question, win_id, parent=None):
|
|
super().__init__(question, win_id, parent)
|
|
self._init_title(question)
|
|
|
|
user_label = QLabel("Username:", self)
|
|
self._user_lineedit = LineEdit(self)
|
|
|
|
password_label = QLabel("Password:", self)
|
|
self._password_lineedit = LineEdit(self)
|
|
self._password_lineedit.setEchoMode(QLineEdit.Password)
|
|
|
|
grid = QGridLayout()
|
|
grid.addWidget(user_label, 1, 0)
|
|
grid.addWidget(self._user_lineedit, 1, 1)
|
|
grid.addWidget(password_label, 2, 0)
|
|
grid.addWidget(self._password_lineedit, 2, 1)
|
|
self._vbox.addLayout(grid)
|
|
self._init_key_label()
|
|
|
|
assert not question.default, question.default
|
|
self.setFocusProxy(self._user_lineedit)
|
|
|
|
def accept(self, value=None):
|
|
if value is not None:
|
|
if ':' not in value:
|
|
raise Error("Value needs to be in the format "
|
|
"username:password, but {} was given".format(
|
|
value))
|
|
username, password = value.split(':', maxsplit=1)
|
|
self.question.answer = AuthTuple(username, password)
|
|
return True
|
|
elif self._user_lineedit.hasFocus():
|
|
# Earlier, tab was bound to :prompt-accept, so to still support
|
|
# that we simply switch the focus when tab was pressed.
|
|
self._password_lineedit.setFocus()
|
|
self._init_key_label()
|
|
return False
|
|
else:
|
|
self.question.answer = AuthTuple(self._user_lineedit.text(),
|
|
self._password_lineedit.text())
|
|
return True
|
|
|
|
def _allowed_commands(self):
|
|
if self._user_lineedit.hasFocus():
|
|
cmds = [('prompt-accept', "Switch to password field")]
|
|
else:
|
|
cmds = [('prompt-accept', "Accept")]
|
|
cmds.append(('leave-mode', "Abort"))
|
|
return cmds
|
|
|
|
|
|
class YesNoPrompt(_BasePrompt):
|
|
|
|
"""A prompt with yes/no answers."""
|
|
|
|
KEY_MODE = usertypes.KeyMode.yesno
|
|
|
|
def __init__(self, question, win_id, parent=None):
|
|
super().__init__(question, win_id, parent)
|
|
self._init_title(question)
|
|
self._init_key_label()
|
|
|
|
def accept(self, value=None):
|
|
if value is None:
|
|
if self.question.default is None:
|
|
raise Error("No default value was set for this question!")
|
|
self.question.answer = self.question.default
|
|
elif value == 'yes':
|
|
self.question.answer = True
|
|
elif value == 'no':
|
|
self.question.answer = False
|
|
else:
|
|
raise Error("Invalid value {} - expected yes/no!".format(value))
|
|
return True
|
|
|
|
def _allowed_commands(self):
|
|
cmds = [
|
|
('prompt-accept yes', "Yes"),
|
|
('prompt-accept no', "No"),
|
|
]
|
|
|
|
if self.question.default is not None:
|
|
assert self.question.default in [True, False]
|
|
default = 'yes' if self.question.default else 'no'
|
|
cmds.append(('prompt-accept', "Use default ({})".format(default)))
|
|
|
|
cmds.append(('leave-mode', "Abort"))
|
|
return cmds
|
|
|
|
|
|
class AlertPrompt(_BasePrompt):
|
|
|
|
"""A prompt without any answer possibility."""
|
|
|
|
def __init__(self, question, win_id, parent=None):
|
|
super().__init__(question, win_id, parent)
|
|
self._init_title(question)
|
|
self._init_key_label()
|
|
|
|
def accept(self, value=None):
|
|
if value is not None:
|
|
raise Error("No value is permitted with alert prompts!")
|
|
# Doing nothing otherwise
|
|
return True
|
|
|
|
def _allowed_commands(self):
|
|
return [('prompt-accept', "Hide")]
|