forked from openlp/openlp
100 lines
4.7 KiB
Python
100 lines
4.7 KiB
Python
# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
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##########################################################################
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# OpenLP - Open Source Lyrics Projection #
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# ---------------------------------------------------------------------- #
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# Copyright (c) 2008-2019 OpenLP Developers #
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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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# (at your option) 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 <https://www.gnu.org/licenses/>. #
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##########################################################################
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"""
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Subclass of QWebEngineView. Adds some special eventhandling needed for screenshots/previews
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Heavily inspired by https://stackoverflow.com/questions/33467776/qt-qwebengine-render-after-scrolling/33576100#33576100
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"""
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import logging
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from PyQt5 import QtCore, QtWebEngineWidgets, QtWidgets
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from openlp.core.common.applocation import AppLocation
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LOG_LEVELS = {
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QtWebEngineWidgets.QWebEnginePage.InfoMessageLevel: logging.INFO,
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QtWebEngineWidgets.QWebEnginePage.WarningMessageLevel: logging.WARNING,
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QtWebEngineWidgets.QWebEnginePage.ErrorMessageLevel: logging.ERROR
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}
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log = logging.getLogger(__name__)
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class WebEnginePage(QtWebEngineWidgets.QWebEnginePage):
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"""
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A custom WebEngine page to capture Javascript console logging
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"""
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def javaScriptConsoleMessage(self, level, message, line_number, source_id):
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"""
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Override the parent method in order to log the messages in OpenLP
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"""
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# The JS log has the entire file location, which we don't really care about
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app_dir = AppLocation.get_directory(AppLocation.AppDir).parent
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source_id = source_id.replace('file://{app_dir}/'.format(app_dir=app_dir), '')
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# Log the JS messages to the Python logger
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log.log(LOG_LEVELS[level], '{source_id}:{line_number} {message}'.format(source_id=source_id,
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line_number=line_number,
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message=message))
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class WebEngineView(QtWebEngineWidgets.QWebEngineView):
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"""
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A sub-classed QWebEngineView to handle paint events of OpenGL (does not seem to work)
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and set some attributtes.
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"""
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_child = None # QtWidgets.QOpenGLWidget or QWidget?
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delegatePaint = QtCore.pyqtSignal()
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def __init__(self, parent=None):
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"""
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Constructor
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"""
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super(WebEngineView, self).__init__(parent)
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self.setPage(WebEnginePage(self))
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self.settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.LocalStorageEnabled, True)
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self.settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.LocalContentCanAccessFileUrls, True)
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self.settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.LocalContentCanAccessRemoteUrls, True)
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self.page().settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.LocalStorageEnabled, True)
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self.page().settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.LocalContentCanAccessFileUrls, True)
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self.page().settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.LocalContentCanAccessRemoteUrls, True)
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def eventFilter(self, obj, ev):
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"""
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Emit delegatePaint on paint event of the last added QOpenGLWidget child
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"""
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if obj == self._child and ev.type() == QtCore.QEvent.Paint:
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self.delegatePaint.emit()
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return super(WebEngineView, self).eventFilter(obj, ev)
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def event(self, ev):
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"""
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Handle events
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"""
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if ev.type() == QtCore.QEvent.ChildAdded:
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# Only use QWidget child (used to be QOpenGLWidget)
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w = ev.child()
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if w and isinstance(w, QtWidgets.QWidget):
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self._child = w
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w.installEventFilter(self)
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return super(WebEngineView, self).event(ev)
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