137 lines
4.0 KiB
Python
137 lines
4.0 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2014-2015 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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"""Utilities related to the look&feel of qutebrowser."""
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import functools
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import collections
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import jinja2
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import sip
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from PyQt5.QtGui import QColor
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from qutebrowser.config import config
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from qutebrowser.utils import log, objreg
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@functools.lru_cache(maxsize=16)
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def get_stylesheet(template_str):
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"""Format a stylesheet based on a template.
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Args:
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template_str: The stylesheet template as string.
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Return:
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The formatted template as string.
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"""
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colordict = ColorDict(config.section('colors'))
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fontdict = FontDict(config.section('fonts'))
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template = jinja2.Template(template_str)
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return template.render(color=colordict, font=fontdict)
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def set_register_stylesheet(obj):
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"""Set the stylesheet for an object based on it's STYLESHEET attribute.
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Also, register an update when the config is changed.
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Args:
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obj: The object to set the stylesheet for and register.
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Must have a STYLESHEET attribute.
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"""
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qss = get_stylesheet(obj.STYLESHEET)
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log.config.vdebug("stylesheet for {}: {}".format(
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obj.__class__.__name__, qss))
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obj.setStyleSheet(qss)
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objreg.get('config').changed.connect(
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functools.partial(update_stylesheet, obj))
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def update_stylesheet(obj):
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"""Update the stylesheet for obj."""
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if not sip.isdeleted(obj):
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obj.setStyleSheet(get_stylesheet(obj.STYLESHEET))
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class ColorDict(collections.UserDict):
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"""A dict aimed at Qt stylesheet colors."""
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def __setitem__(self, key, val):
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"""Override __setitem__ to make sure no QColors are set.
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This could happen when accidentally declaring something as QtColor
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instead of Color in the config, and it'd go unnoticed as the CSS is
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invalid then.
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"""
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if isinstance(val, QColor):
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raise TypeError("QColor passed to ColorDict!")
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self.data[key] = val
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def __getitem__(self, key):
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"""Override dict __getitem__.
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Args:
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key: The key to get from the dict.
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Return:
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If a value wasn't found, return an empty string.
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(Color not defined, so no output in the stylesheet)
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If the key has a .fg. element in it, return color: X;.
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If the key has a .bg. element in it, return background-color: X;.
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In all other cases, return the plain value.
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"""
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try:
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val = self.data[key]
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except KeyError:
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log.config.exception("No color defined for {}!".format(key))
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return ''
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if 'fg' in key.split('.'):
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return 'color: {};'.format(val)
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elif 'bg' in key.split('.'):
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return 'background-color: {};'.format(val)
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else:
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return val
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class FontDict(collections.UserDict):
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"""A dict aimed at Qt stylesheet fonts."""
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def __getitem__(self, key):
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"""Override dict __getitem__.
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Args:
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key: The key to get from the dict.
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Return:
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If a value wasn't found, return an empty string.
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(Color not defined, so no output in the stylesheet)
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In all other cases, return font: <value>.
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"""
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try:
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val = self.data[key]
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except KeyError:
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return ''
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else:
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return 'font: {};'.format(val)
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