PySide2 tabbedbrowswer

#############################################################################
##
## Copyright (C) 2018 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
##   * Redistributions of source code must retain the above copyright
##     notice, this list of conditions and the following disclaimer.
##   * Redistributions in binary form must reproduce the above copyright
##     notice, this list of conditions and the following disclaimer in
##     the documentation and/or other materials provided with the
##     distribution.
##   * Neither the name of The Qt Company Ltd nor the names of its
##     contributors may be used to endorse or promote products derived
##     from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################

import json, os, warnings

from PySide2 import QtCore
from PySide2.QtCore import (QDir, QFileInfo, QModelIndex, QStandardPaths, Qt,
    QUrl)
from PySide2.QtGui import QIcon, QPixmap, QStandardItem, QStandardItemModel
from PySide2.QtWidgets import (QAction, QDockWidget, QMenu, QMessageBox,
    QToolBar, QTreeView, QWidget)

_url_role = Qt.UserRole + 1

# Default bookmarks as an array of arrays which is the form
# used to read from/write to a .json bookmarks file
_default_bookmarks = [
    ['Tool Bar'],
    ['http://qt.io', 'Qt', ':/qt-project.org/qmessagebox/images/qtlogo-64.png'],
    ['https://download.qt.io/snapshots/ci/pyside/', 'Downloads'],
    ['https://doc-snapshots.qt.io/qtforpython/', 'Documentation'],
    ['https://bugreports.qt.io/projects/PYSIDE/', 'Bug Reports'],
    ['https://www.python.org/', 'Python', None],
    ['https://wiki.qt.io/PySide2', 'Qt for Python', None],
    ['Other Bookmarks']
]

def _config_dir():
    return '{}/QtForPythonBrowser'.format(
        QStandardPaths.writableLocation(QStandardPaths.ConfigLocation))

_bookmark_file = 'bookmarks.json'

def _create_folder_item(title):
    result = QStandardItem(title)
    result.setFlags(Qt.ItemIsEnabled | Qt.ItemIsSelectable)
    return result

def _create_item(url, title, icon):
    result = QStandardItem(title)
    result.setFlags(Qt.ItemIsEnabled | Qt.ItemIsSelectable)
    result.setData(url, _url_role)
    if icon is not None:
        result.setIcon(icon)
    return result

# Create the model from an array of arrays
def _create_model(parent, serialized_bookmarks):
    result = QStandardItemModel(0, 1, parent)
    last_folder_item = None
    for entry in serialized_bookmarks:
        if len(entry) == 1:
            last_folder_item = _create_folder_item(entry[0])
            result.appendRow(last_folder_item)
        else:
            url = QUrl.fromUserInput(entry[0])
            title = entry[1]
            icon = QIcon(entry[2]) if len(entry) > 2 and entry[2] else None
            last_folder_item.appendRow(_create_item(url, title, icon))
    return result

# Serialize model into an array of arrays, writing out the icons
# into .png files under directory in the process
def _serialize_model(model, directory):
    result = []
    folder_count = model.rowCount()
    for f in range(0, folder_count):
        folder_item = model.item(f)
        result.append([folder_item.text()])
        item_count = folder_item.rowCount()
        for i in range(0, item_count):
            item = folder_item.child(i)
            entry = [item.data(_url_role).toString(), item.text()]
            icon = item.icon()
            if not icon.isNull():
                icon_sizes = icon.availableSizes()
                largest_size = icon_sizes[len(icon_sizes) - 1]
                icon_file_name = '{}/icon{:02}_{:02}_{}.png'.format(directory,
                               f, i, largest_size.width())
                icon.pixmap(largest_size).save(icon_file_name, 'PNG')
                entry.append(icon_file_name)
            result.append(entry)
    return result

# Bookmarks as a tree view to be used in a dock widget with
# functionality to persist and populate tool bars and menus.
class BookmarkWidget(QTreeView):
    """Provides a tree view to manage the bookmarks."""

    open_bookmark = QtCore.Signal(QUrl)
    open_bookmark_in_new_tab = QtCore.Signal(QUrl)
    changed = QtCore.Signal()

    def __init__(self):
        super(BookmarkWidget, self).__init__()
        self.setRootIsDecorated(False)
        self.setUniformRowHeights(True)
        self.setHeaderHidden(True)
        self._model = _create_model(self, self._read_bookmarks())
        self.setModel(self._model)
        self.expandAll()
        self.activated.connect(self._activated)
        self._model.rowsInserted.connect(self._changed)
        self._model.rowsRemoved.connect(self._changed)
        self._model.dataChanged.connect(self._changed)
        self._modified = False

    def _changed(self):
        self._modified = True
        self.changed.emit()

    def _activated(self, index):
        item = self._model.itemFromIndex(index)
        self.open_bookmark.emit(item.data(_url_role))

    def _action_activated(self, index):
        action = self.sender()
        self.open_bookmark.emit(action.data())

    def _tool_bar_item(self):
        return self._model.item(0, 0)

    def _other_item(self):
        return self._model.item(1, 0)

    def add_bookmark(self, url, title, icon):
        self._other_item().appendRow(_create_item(url, title, icon))

    def add_tool_bar_bookmark(self, url, title, icon):
        self._tool_bar_item().appendRow(_create_item(url, title, icon))

    # Synchronize the bookmarks under parent_item to a target_object
    # like QMenu/QToolBar, which has a list of actions. Update
    # the existing actions, append new ones if needed or hide
    # superfluous ones
    def _populate_actions(self, parent_item, target_object, first_action):
        existing_actions = target_object.actions()
        existing_action_count = len(existing_actions)
        a = first_action
        row_count = parent_item.rowCount()
        for r in range(0, row_count):
            item = parent_item.child(r)
            title = item.text()
            icon = item.icon()
            url = item.data(_url_role)
            if a < existing_action_count:
                action = existing_actions[a]
                if (title != action.toolTip()):
                    action.setText(BookmarkWidget.short_title(title))
                    action.setIcon(icon)
                    action.setToolTip(title)
                    action.setData(url)
                    action.setVisible(True)
            else:
                action = target_object.addAction(icon, BookmarkWidget.short_title(title))
                action.setToolTip(title)
                action.setData(url)
                action.triggered.connect(self._action_activated)
            a = a + 1
        while a < existing_action_count:
            existing_actions[a].setVisible(False)
            a = a + 1

    def populate_tool_bar(self, tool_bar):
        self._populate_actions(self._tool_bar_item(), tool_bar, 0)

    def populate_other(self, menu, first_action):
        self._populate_actions(self._other_item(), menu, first_action)

    def _current_item(self):
        index = self.currentIndex()
        if index.isValid():
            item = self._model.itemFromIndex(index)
            if item.parent(): # exclude top level items
                return item
        return None

    def context_menu_event(self, event):
        context_menu = QMenu()
        open_in_new_tab_action = context_menu.addAction("Open in New Tab")
        remove_action = context_menu.addAction("Remove...")
        current_item = self._current_item()
        open_in_new_tab_action.setEnabled(current_item is not None)
        remove_action.setEnabled(current_item is not None)
        chosen_action = context_menu.exec_(event.globalPos())
        if chosen_action == open_in_new_tab_action:
            self.open_bookmarkInNewTab.emit(current_item.data(_url_role))
        elif chosen_action == remove_action:
            self._remove_item(current_item)

    def _remove_item(self, item):
        button = QMessageBox.question(self, "Remove",
            "Would you like to remove \"{}\"?".format(item.text()),
            QMessageBox.Yes | QMessageBox.No)
        if button == QMessageBox.Yes:
            item.parent().removeRow(item.row())

    def write_bookmarks(self):
        if not self._modified:
            return
        dir_path = _config_dir()
        native_dir_path = QDir.toNativeSeparators(dir_path)
        dir = QFileInfo(dir_path)
        if not dir.isDir():
            print('Creating {}...'.format(native_dir_path))
            if not QDir(dir.absolutePath()).mkpath(dir.fileName()):
                warnings.warn('Cannot create {}.'.format(native_dir_path),
                              RuntimeWarning)
                return
        serialized_model = _serialize_model(self._model, dir_path)
        bookmark_file_name = os.path.join(native_dir_path, _bookmark_file)
        print('Writing {}...'.format(bookmark_file_name))
        with open(bookmark_file_name, 'w') as bookmark_file:
            json.dump(serialized_model, bookmark_file, indent = 4)

    def _read_bookmarks(self):
        bookmark_file_name = os.path.join(QDir.toNativeSeparators(_config_dir()),
                                        _bookmark_file)
        if os.path.exists(bookmark_file_name):
            print('Reading {}...'.format(bookmark_file_name))
            return json.load(open(bookmark_file_name))
        return _default_bookmarks

    # Return a short title for a bookmark action,
    # "Qt | Cross Platform.." -> "Qt"
    @staticmethod
    def short_title(t):
        i = t.find(' | ')
        if i == -1:
            i = t.find(' - ')
        return t[0:i] if i != -1 else t






#############################################################################
##
## Copyright (C) 2018 The Qt Company Ltd.

##
#############################################################################

from functools import partial
import sys

from bookmarkwidget import BookmarkWidget
from webengineview import WebEngineView
from PySide2 import QtCore
from PySide2.QtCore import QPoint, Qt, QUrl
from PySide2.QtWidgets import (QAction, QMenu, QTabBar, QTabWidget)
from PySide2.QtWebEngineWidgets import (QWebEngineDownloadItem,
    QWebEnginePage, QWebEngineProfile)

class BrowserTabWidget(QTabWidget):
    """Enables having several tabs with QWebEngineView."""

    url_changed = QtCore.Signal(QUrl)
    enabled_changed = QtCore.Signal(QWebEnginePage.WebAction, bool)
    download_requested = QtCore.Signal(QWebEngineDownloadItem)

    def __init__(self, window_factory_function):
        super(BrowserTabWidget, self).__init__()
        self.setTabsClosable(True)
        self._window_factory_function = window_factory_function
        self._webengineviews = []
        self.currentChanged.connect(self._current_changed)
        self.tabCloseRequested.connect(self.handle_tab_close_request)
        self._actions_enabled = {}
        for web_action in WebEngineView.web_actions():
            self._actions_enabled[web_action] = False

        tab_bar = self.tabBar()
        tab_bar.setSelectionBehaviorOnRemove(QTabBar.SelectPreviousTab)
        tab_bar.setContextMenuPolicy(Qt.CustomContextMenu)
        tab_bar.customContextMenuRequested.connect(self._handle_tab_context_menu)

    def add_browser_tab(self):
        factory_func = partial(BrowserTabWidget.add_browser_tab, self)
        web_engine_view = WebEngineView(factory_func, self._window_factory_function)
        index = self.count()
        self._webengineviews.append(web_engine_view)
        title = 'Tab {}'.format(index + 1)
        self.addTab(web_engine_view, title)
        page = web_engine_view.page()
        page.titleChanged.connect(self._title_changed)
        page.iconChanged.connect(self._icon_changed)
        page.profile().downloadRequested.connect(self._download_requested)
        web_engine_view.urlChanged.connect(self._url_changed)
        web_engine_view.enabled_changed.connect(self._enabled_changed)
        self.setCurrentIndex(index)
        return web_engine_view

    def load(self, url):
        index = self.currentIndex()
        if index >= 0 and url.isValid():
            self._webengineviews[index].setUrl(url)

    def find(self, needle, flags):
        index = self.currentIndex()
        if index >= 0:
            self._webengineviews[index].page().findText(needle, flags)

    def url(self):
        index = self.currentIndex()
        return self._webengineviews[index].url() if index >= 0 else QUrl()

    def _url_changed(self, url):
        index = self.currentIndex()
        if index >= 0 and self._webengineviews[index] == self.sender():
                self.url_changed.emit(url)

    def _title_changed(self, title):
        index = self._index_of_page(self.sender())
        if (index >= 0):
            self.setTabText(index, BookmarkWidget.short_title(title))

    def _icon_changed(self, icon):
        index = self._index_of_page(self.sender())
        if (index >= 0):
            self.setTabIcon(index, icon)

    def _enabled_changed(self, web_action, enabled):
        index = self.currentIndex()
        if index >= 0 and self._webengineviews[index] == self.sender():
            self._check_emit_enabled_changed(web_action, enabled)

    def _check_emit_enabled_changed(self, web_action, enabled):
        if enabled != self._actions_enabled[web_action]:
            self._actions_enabled[web_action] = enabled
            self.enabled_changed.emit(web_action, enabled)

    def _current_changed(self, index):
        self._update_actions(index)
        self.url_changed.emit(self.url())

    def _update_actions(self, index):
        if index >= 0 and index < len(self._webengineviews):
            view = self._webengineviews[index]
            for web_action in WebEngineView.web_actions():
                enabled = view.is_web_action_enabled(web_action)
                self._check_emit_enabled_changed(web_action, enabled)

    def back(self):
        self._trigger_action(QWebEnginePage.Back)

    def forward(self):
        self._trigger_action(QWebEnginePage.Forward)

    def reload(self):
        self._trigger_action(QWebEnginePage.Reload)

    def undo(self):
        self._trigger_action(QWebEnginePage.Undo)

    def redo(self):
        self._trigger_action(QWebEnginePage.Redo)

    def cut(self):
        self._trigger_action(QWebEnginePage.Cut)

    def copy(self):
        self._trigger_action(QWebEnginePage.Copy)

    def paste(self):
        self._trigger_action(QWebEnginePage.Paste)

    def select_all(self):
        self._trigger_action(QWebEnginePage.SelectAll)

    def zoom_factor(self):
        return self._webengineviews[0].zoomFactor() if self._webengineviews else 1.0

    def set_zoom_factor(self, z):
        for w in self._webengineviews:
            w.setZoomFactor(z)

    def _handle_tab_context_menu(self, point):
        index = self.tabBar().tabAt(point)
        if index < 0:
            return
        tab_count = len(self._webengineviews)
        context_menu = QMenu()
        duplicate_tab_action = context_menu.addAction("Duplicate Tab")
        close_other_tabs_action = context_menu.addAction("Close Other Tabs")
        close_other_tabs_action.setEnabled(tab_count > 1)
        close_tabs_to_the_right_action = context_menu.addAction("Close Tabs to the Right")
        close_tabs_to_the_right_action.setEnabled(index < tab_count - 1)
        close_tab_action = context_menu.addAction("&Close Tab")
        chosen_action = context_menu.exec_(self.tabBar().mapToGlobal(point))
        if chosen_action == duplicate_tab_action:
            current_url = self.url()
            self.add_browser_tab().load(current_url)
        elif chosen_action == close_other_tabs_action:
            for t in range(tab_count - 1, -1, -1):
                if t != index:
                     self.handle_tab_close_request(t)
        elif chosen_action == close_tabs_to_the_right_action:
            for t in range(tab_count - 1, index, -1):
                self.handle_tab_close_request(t)
        elif chosen_action == close_tab_action:
            self.handle_tab_close_request(index)

    def handle_tab_close_request(self, index):
        if (index >= 0 and self.count() > 1):
            self._webengineviews.remove(self._webengineviews[index])
            self.removeTab(index)

    def close_current_tab(self):
        self.handle_tab_close_request(self.currentIndex())

    def _trigger_action(self, action):
        index = self.currentIndex()
        if index >= 0:
            self._webengineviews[index].page().triggerAction(action)

    def _index_of_page(self, web_page):
        for p in range(0, len(self._webengineviews)):
            if (self._webengineviews[p].page() == web_page):
                return p
        return -1

    def _download_requested(self, item):
        self.downloadRequested.emit(item)






#############################################################################
##
## Copyright (C) 2018 The Qt Company Ltd.

#############################################################################

import sys
from PySide2 import QtCore
from PySide2.QtCore import QDir, QFileInfo, QStandardPaths, Qt, QUrl
from PySide2.QtGui import QDesktopServices
from PySide2.QtWidgets import (QAction, QLabel, QMenu, QProgressBar,
    QStyleFactory, QWidget)
from PySide2.QtWebEngineWidgets import QWebEngineDownloadItem

# A QProgressBar with context menu for displaying downloads in a QStatusBar.
class DownloadWidget(QProgressBar):
    """Lets you track progress of a QWebEngineDownloadItem."""
    finished = QtCore.Signal()
    remove_requested = QtCore.Signal()

    def __init__(self, download_item):
        super(DownloadWidget, self).__init__()
        self._download_item = download_item
        download_item.finished.connect(self._finished)
        download_item.downloadProgress.connect(self._download_progress)
        download_item.stateChanged.connect(self._update_tool_tip())
        path = download_item.path()
        self.setMaximumWidth(300)
        # Shorten 'PySide2-5.11.0a1-5.11.0-cp36-cp36m-linux_x86_64.whl'...
        description = QFileInfo(path).fileName()
        description_length = len(description)
        if description_length > 30:
            description = '{}...{}'.format(description[0:10], description[description_length - 10:])
        self.setFormat('{} %p%'.format(description))
        self.setOrientation(Qt.Horizontal)
        self.setMinimum(0)
        self.setValue(0)
        self.setMaximum(100)
        self._update_tool_tip()
        # Force progress bar text to be shown on macoS by using 'fusion' style
        if sys.platform == 'darwin':
            self.setStyle(QStyleFactory.create('fusion'))

    @staticmethod
    def open_file(file):
        QDesktopServices.openUrl(QUrl.fromLocalFile(file))

    @staticmethod
    def open_download_directory():
        path = QStandardPaths.writableLocation(QStandardPaths.DownloadLocation)
        DownloadWidget.open_file(path)

    def state(self):
        return self._download_item.state()

    def _update_tool_tip(self):
        path = self._download_item.path()
        tool_tip = "{}\n{}".format(self._download_item.url().toString(),
            QDir.toNativeSeparators(path))
        total_bytes = self._download_item.total_bytes()
        if total_bytes > 0:
            tool_tip += "\n{}K".format(total_bytes / 1024)
        state = self.state()
        if state == QWebEngineDownloadItem.DownloadRequested:
            tool_tip += "\n(requested)"
        elif state == QWebEngineDownloadItem.DownloadInProgress:
            tool_tip += "\n(downloading)"
        elif state == QWebEngineDownloadItem.DownloadCompleted:
            tool_tip += "\n(completed)"
        elif state == QWebEngineDownloadItem.DownloadCancelled:
            tool_tip += "\n(cancelled)"
        else:
            tool_tip += "\n(interrupted)"
        self.setToolTip(tool_tip)

    def _download_progress(self, bytes_received, bytes_total):
        self.setValue(int(100 * bytes_received / bytes_total))

    def _finished(self):
        self._update_tool_tip()
        self.finished.emit()

    def _launch(self):
        DownloadWidget.open_file(self._download_item.path())

    def mouse_double_click_event(self, event):
        if self.state() == QWebEngineDownloadItem.DownloadCompleted:
            self._launch()

    def context_menu_event(self, event):
        state = self.state()
        context_menu = QMenu()
        launch_action = context_menu.addAction("Launch")
        launch_action.setEnabled(state == QWebEngineDownloadItem.DownloadCompleted)
        show_in_folder_action = context_menu.addAction("Show in Folder")
        show_in_folder_action.setEnabled(state == QWebEngineDownloadItem.DownloadCompleted)
        cancel_action = context_menu.addAction("Cancel")
        cancel_action.setEnabled(state == QWebEngineDownloadItem.DownloadInProgress)
        remove_action = context_menu.addAction("Remove")
        remove_action.setEnabled(state != QWebEngineDownloadItem.DownloadInProgress)

        chosen_action = context_menu.exec_(event.globalPos())
        if chosen_action == launch_action:
            self._launch()
        elif chosen_action == show_in_folder_action:
            DownloadWidget.open_file(QFileInfo(self._download_item.path()).absolutePath())
        elif chosen_action == cancel_action:
            self._download_item.cancel()
        elif chosen_action == remove_action:
            self.remove_requested.emit()





#############################################################################
##
## Copyright (C) 2018 The Qt Company Ltd.

##
#############################################################################

from PySide2 import QtCore
from PySide2.QtCore import Qt, QUrl
from PySide2.QtGui import QIcon, QKeySequence
from PySide2.QtWidgets import (QAction, QCheckBox, QDockWidget, QHBoxLayout,
    QLabel, QLineEdit, QToolBar, QToolButton, QWidget)
from PySide2.QtWebEngineWidgets import QWebEnginePage

# A Find tool bar (bottom area)
class FindToolBar(QToolBar):

    find = QtCore.Signal(str, QWebEnginePage.FindFlags)

    def __init__(self):
        super(FindToolBar, self).__init__()
        self._line_edit = QLineEdit()
        self._line_edit.setClearButtonEnabled(True)
        self._line_edit.setPlaceholderText("Find...")
        self._line_edit.setMaximumWidth(300)
        self._line_edit.returnPressed.connect(self._find_next)
        self.addWidget(self._line_edit)

        self._previous_button = QToolButton()
        self._previous_button.setIcon(QIcon(':/qt-project.org/styles/commonstyle/images/up-32.png'))
        self._previous_button.clicked.connect(self._find_previous)
        self.addWidget(self._previous_button)

        self._next_button = QToolButton()
        self._next_button.setIcon(QIcon(':/qt-project.org/styles/commonstyle/images/down-32.png'))
        self._next_button.clicked.connect(self._find_next)
        self.addWidget(self._next_button)

        self._case_sensitive_checkbox = QCheckBox('Case Sensitive')
        self.addWidget(self._case_sensitive_checkbox)

        self._hideButton = QToolButton()
        self._hideButton.setShortcut(QKeySequence(Qt.Key_Escape))
        self._hideButton.setIcon(QIcon(':/qt-project.org/styles/macstyle/images/closedock-16.png'))
        self._hideButton.clicked.connect(self.hide)
        self.addWidget(self._hideButton)

    def focus_find(self):
        self._line_edit.setFocus()

    def _emit_find(self, backward):
        needle =  self._line_edit.text().strip()
        if needle:
            flags = QWebEnginePage.FindFlags()
            if self._case_sensitive_checkbox.isChecked():
                flags |= QWebEnginePage.FindCaseSensitively
            if backward:
                flags |= QWebEnginePage.FindBackward
            self.find.emit(needle, flags)

    def _find_next(self):
        self._emit_find(False)

    def _find_previous(self):
        self._emit_find(True)






#############################################################################
##
## Copyright (C) 2018 The Qt Company Ltd.

##
#############################################################################

"""PySide2 WebEngineWidgets Example"""

import sys
from bookmarkwidget import BookmarkWidget
from browsertabwidget import BrowserTabWidget
from downloadwidget import DownloadWidget
from findtoolbar import FindToolBar
from webengineview import QWebEnginePage, WebEngineView
from PySide2 import QtCore
from PySide2.QtCore import Qt, QUrl
from PySide2.QtGui import QCloseEvent, QKeySequence, QIcon
from PySide2.QtWidgets import (qApp, QAction, QApplication, QDesktopWidget,
    QDockWidget, QLabel, QLineEdit, QMainWindow, QMenu, QMenuBar, QPushButton,
    QStatusBar, QToolBar)
from PySide2.QtWebEngineWidgets import (QWebEngineDownloadItem, QWebEnginePage,
    QWebEngineView)

main_windows = []

def create_main_window():
    """Creates a MainWindow using 75% of the available screen resolution."""
    main_win = MainWindow()
    main_windows.append(main_win)
    available_geometry = app.desktop().availableGeometry(main_win)
    main_win.resize(available_geometry.width() * 2 / 3, available_geometry.height() * 2 / 3)
    main_win.show()
    return main_win

def create_main_window_with_browser():
    """Creates a MainWindow with a BrowserTabWidget."""
    main_win = create_main_window()
    return main_win.add_browser_tab()

class MainWindow(QMainWindow):
    """Provides the parent window that includes the BookmarkWidget,
    BrowserTabWidget, and a DownloadWidget, to offer the complete
    web browsing experience."""
    def __init__(self):
        super(MainWindow, self).__init__()

        self.setWindowTitle('PySide2 tabbed browser Example')

        self._tab_widget = BrowserTabWidget(create_main_window_with_browser)
        self._tab_widget.enabled_changed.connect(self._enabled_changed)
        self._tab_widget.download_requested.connect(self._download_requested)
        self.setCentralWidget(self._tab_widget)
        self.connect(self._tab_widget, QtCore.SIGNAL("url_changed(QUrl)"),
                     self.url_changed)

        self._bookmark_dock = QDockWidget()
        self._bookmark_dock.setWindowTitle('Bookmarks')
        self._bookmark_widget = BookmarkWidget()
        self._bookmark_widget.open_bookmark.connect(self.load_url)
        self._bookmark_widget.open_bookmark_in_new_tab.connect(self.load_url_in_new_tab)
        self._bookmark_dock.setWidget(self._bookmark_widget)
        self.addDockWidget(Qt.LeftDockWidgetArea, self._bookmark_dock)

        self._find_tool_bar = None

        self._actions = {}
        self._create_menu()

        self._tool_bar = QToolBar()
        self.addToolBar(self._tool_bar)
        for action in self._actions.values():
            if not action.icon().isNull():
                self._tool_bar.addAction(action)

        self._addres_line_edit = QLineEdit()
        self._addres_line_edit.setClearButtonEnabled(True)
        self._addres_line_edit.returnPressed.connect(self.load)
        self._tool_bar.addWidget(self._addres_line_edit)
        self._zoom_label = QLabel()
        self.statusBar().addPermanentWidget(self._zoom_label)
        self._update_zoom_label()

        self._bookmarksToolBar = QToolBar()
        self.addToolBar(Qt.TopToolBarArea, self._bookmarksToolBar)
        self.insertToolBarBreak(self._bookmarksToolBar)
        self._bookmark_widget.changed.connect(self._update_bookmarks)
        self._update_bookmarks()

    def _update_bookmarks(self):
        self._bookmark_widget.populate_tool_bar(self._bookmarksToolBar)
        self._bookmark_widget.populate_other(self._bookmark_menu, 3)

    def _create_menu(self):
        file_menu = self.menuBar().addMenu("&File")
        exit_action = QAction(QIcon.fromTheme("application-exit"), "E&xit",
                             self, shortcut = "Ctrl+Q", triggered=qApp.quit)
        file_menu.addAction(exit_action)

        navigation_menu = self.menuBar().addMenu("&Navigation")

        style_icons = ':/qt-project.org/styles/commonstyle/images/'
        back_action = QAction(QIcon.fromTheme("go-previous",
                                             QIcon(style_icons + 'left-32.png')),
                             "Back", self,
                             shortcut = QKeySequence(QKeySequence.Back),
                             triggered = self._tab_widget.back)
        self._actions[QWebEnginePage.Back] = back_action
        back_action.setEnabled(False)
        navigation_menu.addAction(back_action)
        forward_action = QAction(QIcon.fromTheme("go-next",
                                                QIcon(style_icons + 'right-32.png')),
                                "Forward", self,
                                shortcut = QKeySequence(QKeySequence.Forward),
                                triggered = self._tab_widget.forward)
        forward_action.setEnabled(False)
        self._actions[QWebEnginePage.Forward] = forward_action

        navigation_menu.addAction(forward_action)
        reload_action = QAction(QIcon(style_icons + 'refresh-32.png'),
                               "Reload", self,
                               shortcut = QKeySequence(QKeySequence.Refresh),
                               triggered = self._tab_widget.reload)
        self._actions[QWebEnginePage.Reload] = reload_action
        reload_action.setEnabled(False)
        navigation_menu.addAction(reload_action)

        navigation_menu.addSeparator()

        new_tab_action = QAction("New Tab", self,
                             shortcut = 'Ctrl+T',
                             triggered = self.add_browser_tab)
        navigation_menu.addAction(new_tab_action)

        close_tab_action = QAction("Close Current Tab", self,
                                 shortcut = "Ctrl+W",
                                 triggered = self._close_current_tab)
        navigation_menu.addAction(close_tab_action)

        edit_menu = self.menuBar().addMenu("&Edit")

        find_action = QAction("Find", self,
                             shortcut = QKeySequence(QKeySequence.Find),
                             triggered = self._show_find)
        edit_menu.addAction(find_action)

        edit_menu.addSeparator()
        undo_action = QAction("Undo", self,
                             shortcut = QKeySequence(QKeySequence.Undo),
                             triggered = self._tab_widget.undo)
        self._actions[QWebEnginePage.Undo] = undo_action
        undo_action.setEnabled(False)
        edit_menu.addAction(undo_action)

        redo_action = QAction("Redo", self,
                             shortcut = QKeySequence(QKeySequence.Redo),
                             triggered = self._tab_widget.redo)
        self._actions[QWebEnginePage.Redo] = redo_action
        redo_action.setEnabled(False)
        edit_menu.addAction(redo_action)

        edit_menu.addSeparator()

        cut_action = QAction("Cut", self,
                            shortcut = QKeySequence(QKeySequence.Cut),
                            triggered = self._tab_widget.cut)
        self._actions[QWebEnginePage.Cut] = cut_action
        cut_action.setEnabled(False)
        edit_menu.addAction(cut_action)

        copy_action = QAction("Copy", self,
                             shortcut = QKeySequence(QKeySequence.Copy),
                             triggered = self._tab_widget.copy)
        self._actions[QWebEnginePage.Copy] = copy_action
        copy_action.setEnabled(False)
        edit_menu.addAction(copy_action)

        paste_action = QAction("Paste", self,
                             shortcut = QKeySequence(QKeySequence.Paste),
                             triggered = self._tab_widget.paste)
        self._actions[QWebEnginePage.Paste] = paste_action
        paste_action.setEnabled(False)
        edit_menu.addAction(paste_action)

        edit_menu.addSeparator()

        select_all_action = QAction("Select All", self,
                                  shortcut = QKeySequence(QKeySequence.SelectAll),
                                  triggered = self._tab_widget.select_all)
        self._actions[QWebEnginePage.SelectAll] = select_all_action
        select_all_action.setEnabled(False)
        edit_menu.addAction(select_all_action)

        self._bookmark_menu = self.menuBar().addMenu("&Bookmarks")
        add_bookmark_action = QAction("&Add Bookmark", self,
                                    triggered = self._add_bookmark)
        self._bookmark_menu.addAction(add_bookmark_action)
        add_tool_bar_bookmark_action = QAction("&Add Bookmark to Tool Bar", self,
                                           triggered = self._add_tool_bar_bookmark)
        self._bookmark_menu.addAction(add_tool_bar_bookmark_action)
        self._bookmark_menu.addSeparator()

        tools_menu = self.menuBar().addMenu("&Tools")
        download_action = QAction("Open Downloads", self,
                                 triggered = DownloadWidget.open_download_directory)
        tools_menu.addAction(download_action)

        window_menu = self.menuBar().addMenu("&Window")

        window_menu.addAction(self._bookmark_dock.toggleViewAction())

        window_menu.addSeparator()

        zoom_in_action = QAction(QIcon.fromTheme("zoom-in"),
                               "Zoom In", self,
                               shortcut = QKeySequence(QKeySequence.ZoomIn),
                               triggered = self._zoom_in)
        window_menu.addAction(zoom_in_action)
        zoom_out_action = QAction(QIcon.fromTheme("zoom-out"),
                                "Zoom Out", self,
                                shortcut = QKeySequence(QKeySequence.ZoomOut),
                                triggered = self._zoom_out)
        window_menu.addAction(zoom_out_action)

        reset_zoom_action = QAction(QIcon.fromTheme("zoom-original"),
                                  "Reset Zoom", self,
                                  shortcut = "Ctrl+0",
                                  triggered = self._reset_zoom)
        window_menu.addAction(reset_zoom_action)

        about_menu = self.menuBar().addMenu("&About")
        about_action = QAction("About Qt", self,
                              shortcut = QKeySequence(QKeySequence.HelpContents),
                              triggered=qApp.aboutQt)
        about_menu.addAction(about_action)

    def add_browser_tab(self):
        return self._tab_widget.add_browser_tab()

    def _close_current_tab(self):
        if self._tab_widget.count() > 1:
            self._tab_widget.close_current_tab()
        else:
            self.close()

    def close_event(self, event):
        main_windows.remove(self)
        event.accept()

    def load(self):
        url_string = self._addres_line_edit.text().strip()
        if url_string:
            self.load_url_string(url_string)

    def load_url_string(self, url_s):
        url = QUrl.fromUserInput(url_s)
        if (url.isValid()):
            self.load_url(url)

    def load_url(self, url):
        self._tab_widget.load(url)

    def load_url_in_new_tab(self, url):
        self.add_browser_tab().load(url)

    def url_changed(self, url):
        self._addres_line_edit.setText(url.toString())

    def _enabled_changed(self, web_action, enabled):
        action = self._actions[web_action]
        if action:
            action.setEnabled(enabled)

    def _add_bookmark(self):
        index = self._tab_widget.currentIndex()
        if index >= 0:
            url = self._tab_widget.url()
            title = self._tab_widget.tabText(index)
            icon = self._tab_widget.tabIcon(index)
            self._bookmark_widget.add_bookmark(url, title, icon)

    def _add_tool_bar_bookmark(self):
        index = self._tab_widget.currentIndex()
        if index >= 0:
            url = self._tab_widget.url()
            title = self._tab_widget.tabText(index)
            icon = self._tab_widget.tabIcon(index)
            self._bookmark_widget.add_tool_bar_bookmark(url, title, icon)

    def _zoom_in(self):
        new_zoom = self._tab_widget.zoom_factor() * 1.5
        if (new_zoom <= WebEngineView.maximum_zoom_factor()):
            self._tab_widget.set_zoom_factor(new_zoom)
            self._update_zoom_label()

    def _zoom_out(self):
        new_zoom = self._tab_widget.zoom_factor() / 1.5
        if (new_zoom >= WebEngineView.minimum_zoom_factor()):
            self._tab_widget.set_zoom_factor(new_zoom)
            self._update_zoom_label()

    def _reset_zoom(self):
        self._tab_widget.set_zoom_factor(1)
        self._update_zoom_label()

    def _update_zoom_label(self):
        percent = int(self._tab_widget.zoom_factor() * 100)
        self._zoom_label.setText("{}%".format(percent))

    def _download_requested(self, item):
        # Remove old downloads before opening a new one
        for old_download in self.statusBar().children():
            if type(old_download).__name__ == 'download_widget' and \
                old_download.state() != QWebEngineDownloadItem.DownloadInProgress:
                self.statusBar().removeWidget(old_download)
                del old_download

        item.accept()
        download_widget = download_widget(item)
        download_widget.removeRequested.connect(self._remove_download_requested,
                                               Qt.QueuedConnection)
        self.statusBar().addWidget(download_widget)

    def _remove_download_requested(self):
            download_widget = self.sender()
            self.statusBar().removeWidget(download_widget)
            del download_widget

    def _show_find(self):
        if self._find_tool_bar is None:
            self._find_tool_bar = FindToolBar()
            self._find_tool_bar.find.connect(self._tab_widget.find)
            self.addToolBar(Qt.BottomToolBarArea, self._find_tool_bar)
        else:
            self._find_tool_bar.show()
        self._find_tool_bar.focus_find()

    def write_bookmarks(self):
        self._bookmark_widget.write_bookmarks()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_win = create_main_window()
    initial_urls = sys.argv[1:]
    if not initial_urls:
        initial_urls.append('http://qt.io')
    for url in initial_urls:
        main_win.load_url_in_new_tab(QUrl.fromUserInput(url))
    exit_code = app.exec_()
    main_win.write_bookmarks()
    sys.exit(exit_code)





#############################################################################


#############################################################################

import sys
from PySide2.QtWebEngineWidgets import QWebEnginePage, QWebEngineView

from PySide2 import QtCore

_web_actions = [QWebEnginePage.Back, QWebEnginePage.Forward,
               QWebEnginePage.Reload,
               QWebEnginePage.Undo, QWebEnginePage.Redo,
               QWebEnginePage.Cut, QWebEnginePage.Copy,
               QWebEnginePage.Paste, QWebEnginePage.SelectAll]

class WebEngineView(QWebEngineView):

    enabled_changed = QtCore.Signal(QWebEnginePage.WebAction, bool)

    @staticmethod
    def web_actions():
        return _web_actions

    @staticmethod
    def minimum_zoom_factor():
        return 0.25

    @staticmethod
    def maximum_zoom_factor():
        return 5

    def __init__(self, tab_factory_func, window_factory_func):
        super(WebEngineView, self).__init__()
        self._tab_factory_func = tab_factory_func
        self._window_factory_func = window_factory_func
        page = self.page()
        self._actions = {}
        for web_action in WebEngineView.web_actions():
            action = page.action(web_action)
            action.changed.connect(self._enabled_changed)
            self._actions[action] = web_action

    def is_web_action_enabled(self, web_action):
        return self.page().action(web_action).isEnabled()

    def create_window(self, window_type):
        if window_type == QWebEnginePage.WebBrowserTab or window_type == QWebEnginePage.WebBrowserBackgroundTab:
            return self._tab_factory_func()
        return self._window_factory_func()

    def _enabled_changed(self):
        action = self.sender()
        web_action = self._actions[action]
        self.enabled_changed.emit(web_action, action.isEnabled())




#tabbed browser.pyqtc
main.py
bookmarkwidget.py
browsertabwidget.py
downloadwidget.py
findtoolbar.py
webengineview.py