Coverage for qutebrowser/browser/webkit/webview.py : 0%

# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et: 

# Copyright 2014-2018 Florian Bruhin (The Compiler) <mail@qutebrowser.org> 

# 

# This file is part of qutebrowser. 

# 

# qutebrowser is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# qutebrowser is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the GNU General Public License 

# along with qutebrowser. If not, see <http://www.gnu.org/licenses/>. 

"""The main browser widgets.""" 

from PyQt5.QtCore import pyqtSignal, pyqtSlot, Qt, QUrl 

from PyQt5.QtGui import QPalette 

from PyQt5.QtWidgets import QStyleFactory 

from PyQt5.QtWebKit import QWebSettings 

from PyQt5.QtWebKitWidgets import QWebView, QWebPage 

from qutebrowser.config import config 

from qutebrowser.keyinput import modeman 

from qutebrowser.utils import log, usertypes, utils, objreg, debug 

from qutebrowser.browser.webkit import webpage 

class WebView(QWebView): 

"""Custom QWebView subclass with qutebrowser-specific features. 

Attributes: 

tab: The WebKitTab object for this WebView 

hintmanager: The HintManager instance for this view. 

scroll_pos: The current scroll position as (x%, y%) tuple. 

win_id: The window ID of the view. 

_tab_id: The tab ID of the view. 

_old_scroll_pos: The old scroll position. 

Signals: 

scroll_pos_changed: Scroll percentage of current tab changed. 

arg 1: x-position in %. 

arg 2: y-position in %. 

shutting_down: Emitted when the view is shutting down. 

""" 

scroll_pos_changed = pyqtSignal(int, int) 

shutting_down = pyqtSignal() 

def __init__(self, *, win_id, tab_id, tab, private, parent=None): 

super().__init__(parent) 

if utils.is_mac: 

# WORKAROUND for https://bugreports.qt.io/browse/QTBUG-42948 

# See https://github.com/qutebrowser/qutebrowser/issues/462 

self.setStyle(QStyleFactory.create('Fusion')) 

# FIXME:qtwebengine this is only used to set the zoom factor from 

# the QWebPage - we should get rid of it somehow (signals?) 

self.tab = tab 

self._tabdata = tab.data 

self.win_id = win_id 

self.scroll_pos = (-1, -1) 

self._old_scroll_pos = (-1, -1) 

self._set_bg_color() 

self._tab_id = tab_id 

page = webpage.BrowserPage(win_id=self.win_id, tab_id=self._tab_id, 

tabdata=tab.data, private=private, 

parent=self) 

page.setVisibilityState( 

QWebPage.VisibilityStateVisible if self.isVisible() 

else QWebPage.VisibilityStateHidden) 

self.setPage(page) 

mode_manager = objreg.get('mode-manager', scope='window', 

window=win_id) 

mode_manager.entered.connect(self.on_mode_entered) 

mode_manager.left.connect(self.on_mode_left) 

config.instance.changed.connect(self._set_bg_color) 

def __repr__(self): 

url = utils.elide(self.url().toDisplayString(QUrl.EncodeUnicode), 100) 

return utils.get_repr(self, tab_id=self._tab_id, url=url) 

def __del__(self): 

# Explicitly releasing the page here seems to prevent some segfaults 

# when quitting. 

# Copied from: 

# https://code.google.com/p/webscraping/source/browse/webkit.py#325 

try: 

self.setPage(None) 

except RuntimeError: 

# It seems sometimes Qt has already deleted the QWebView and we 

# get: RuntimeError: wrapped C/C++ object of type WebView has been 

# deleted 

pass 

@config.change_filter('colors.webpage.bg') 

def _set_bg_color(self): 

"""Set the webpage background color as configured.""" 

col = config.val.colors.webpage.bg 

palette = self.palette() 

if col is None: 

col = self.style().standardPalette().color(QPalette.Base) 

palette.setColor(QPalette.Base, col) 

self.setPalette(palette) 

def shutdown(self): 

"""Shut down the webview.""" 

self.shutting_down.emit() 

# We disable javascript because that prevents some segfaults when 

# quitting it seems. 

log.destroy.debug("Shutting down {!r}.".format(self)) 

settings = self.settings() 

settings.setAttribute(QWebSettings.JavascriptEnabled, False) 

self.stop() 

self.page().shutdown() 

def openurl(self, url): 

"""Open a URL in the browser. 

Args: 

url: The URL to load as QUrl 

""" 

self.load(url) 

@pyqtSlot(usertypes.KeyMode) 

def on_mode_entered(self, mode): 

"""Ignore attempts to focus the widget if in any status-input mode. 

FIXME:qtwebengine 

For QtWebEngine, doing the same has no effect, so we do it in here. 

""" 

if mode in [usertypes.KeyMode.command, usertypes.KeyMode.prompt, 

usertypes.KeyMode.yesno]: 

log.webview.debug("Ignoring focus because mode {} was " 

"entered.".format(mode)) 

self.setFocusPolicy(Qt.NoFocus) 

@pyqtSlot(usertypes.KeyMode) 

def on_mode_left(self, mode): 

"""Restore focus policy if status-input modes were left. 

FIXME:qtwebengine 

For QtWebEngine, doing the same has no effect, so we do it in here. 

""" 

if mode in [usertypes.KeyMode.command, usertypes.KeyMode.prompt, 

usertypes.KeyMode.yesno]: 

log.webview.debug("Restoring focus policy because mode {} was " 

"left.".format(mode)) 

self.setFocusPolicy(Qt.WheelFocus) 

def createWindow(self, wintype): 

"""Called by Qt when a page wants to create a new window. 

This function is called from the createWindow() method of the 

associated QWebPage, each time the page wants to create a new window of 

the given type. This might be the result, for example, of a JavaScript 

request to open a document in a new window. 

Args: 

wintype: This enum describes the types of window that can be 

created by the createWindow() function. 

QWebPage::WebBrowserWindow: The window is a regular web 

browser window. 

QWebPage::WebModalDialog: The window acts as modal dialog. 

Return: 

The new QWebView object. 

""" 

debug_type = debug.qenum_key(QWebPage, wintype) 

log.webview.debug("createWindow with type {}".format(debug_type)) 

if wintype == QWebPage.WebModalDialog: 

log.webview.warning("WebModalDialog requested, but we don't " 

"support that!") 

tabbed_browser = objreg.get('tabbed-browser', scope='window', 

window=self.win_id) 

# pylint: disable=protected-access 

return tabbed_browser.tabopen(background=False)._widget 

def paintEvent(self, e): 

"""Extend paintEvent to emit a signal if the scroll position changed. 

This is a bit of a hack: We listen to repaint requests here, in the 

hope a repaint will always be requested when scrolling, and if the 

scroll position actually changed, we emit a signal. 

QtWebEngine has a scrollPositionChanged signal, so it's not needed 

there. 

Args: 

e: The QPaintEvent. 

Return: 

The superclass event return value. 

""" 

frame = self.page().mainFrame() 

new_pos = (frame.scrollBarValue(Qt.Horizontal), 

frame.scrollBarValue(Qt.Vertical)) 

if self._old_scroll_pos != new_pos: 

self._old_scroll_pos = new_pos 

m = (frame.scrollBarMaximum(Qt.Horizontal), 

frame.scrollBarMaximum(Qt.Vertical)) 

perc = (round(100 * new_pos[0] / m[0]) if m[0] != 0 else 0, 

round(100 * new_pos[1] / m[1]) if m[1] != 0 else 0) 

self.scroll_pos = perc 

self.scroll_pos_changed.emit(*perc) 

# Let superclass handle the event 

super().paintEvent(e) 

def contextMenuEvent(self, e): 

"""Save a reference to the context menu so we can close it. 

This is not needed for QtWebEngine, so it's in here. 

""" 

menu = self.page().createStandardContextMenu() 

self.shutting_down.connect(menu.close) 

modeman.instance(self.win_id).entered.connect(menu.close) 

menu.exec_(e.globalPos()) 

def showEvent(self, e): 

"""Extend showEvent to set the page visibility state to visible. 

Args: 

e: The QShowEvent. 

Return: 

The superclass event return value. 

""" 

super().showEvent(e) 

self.page().setVisibilityState(QWebPage.VisibilityStateVisible) 

def hideEvent(self, e): 

"""Extend hideEvent to set the page visibility state to hidden. 

Args: 

e: The QHideEvent. 

Return: 

The superclass event return value. 

""" 

super().hideEvent(e) 

self.page().setVisibilityState(QWebPage.VisibilityStateHidden) 

def mousePressEvent(self, e): 

"""Set the tabdata ClickTarget on a mousepress. 

This is implemented here as we don't need it for QtWebEngine. 

""" 

if e.button() == Qt.MidButton or e.modifiers() & Qt.ControlModifier: 

background = config.val.tabs.background 

if e.modifiers() & Qt.ShiftModifier: 

background = not background 

if background: 

target = usertypes.ClickTarget.tab_bg 

else: 

target = usertypes.ClickTarget.tab 

self.page().open_target = target 

log.mouse.debug("Ctrl/Middle click, setting target: {}".format( 

target)) 

else: 

self.page().open_target = usertypes.ClickTarget.normal 

log.mouse.debug("Normal click, setting normal target") 

super().mousePressEvent(e)