Strip down demobrowser to become simplebrowser

Demobrowser changes:
* remove QLocalServer/Socket
* remove AutoSaver
* remove restoreLastSession
* remove general QSettings
* remove downloadManager
* remove bookmarkManager
* remove historyManager
* remove searchBar
* favor setStyleSheet over overriding paint methods
* use lambdas where suitable
* use QProgressBar instead of own painted widget
* use QToolButton instead of own painted buttons
* remove QStackWidget, use single UrlLineEdit per window
  instead of per tab
* split files to keep own classes: webpage and webview
* remove tracking windows by QPoiner
* remove WebPageActionMapper, TabBar classes
* remove QDrag dead code
* remove special OS X close app handling
* fix encapsulation, clean up application logic

Change-Id: I4849b6a2de739dea4f01229abdb90418601a2397
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>
Reviewed-by: Alexandru Croitor <alexandru.croitor@theqtcompany.com>

1 files changed, 189 insertions, 0 deletions

diff --git a/examples/webenginewidgets/simplebrowser/webview.cpp b/examples/webenginewidgets/simplebrowser/webview.cpp
new file mode 100644
index 000000000..1fabcc69f
--- /dev/null
+++ b/examples/webenginewidgets/simplebrowser/webview.cpp
@@ -0,0 +1,189 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "browser.h"
+#include "browserwindow.h"
+#include "tabwidget.h"
+#include "webpage.h"
+#include "webpopupwindow.h"
+#include "webview.h"
+#include <QContextMenuEvent>
+#include <QMenu>
+#include <QMessageBox>
+#include <QNetworkReply>
+#include <QTimer>
+
+WebView::WebView(QWidget *parent)
+    : QWebEngineView(parent)
+    , m_loadProgress(0)
+{
+    connect(this, &QWebEngineView::loadProgress, [this](int progress) {
+        m_loadProgress = progress;
+    });
+    connect(this, &QWebEngineView::loadFinished, [this](bool success) {
+        if (!success) {
+            qWarning() << "Could not load page: " << url();
+            m_loadProgress = 0;
+        }
+    });
+    connect(this, &QWebEngineView::iconUrlChanged, this, &WebView::handleIconUrlChanged);
+    connect(this, &QWebEngineView::renderProcessTerminated,
+            [this](QWebEnginePage::RenderProcessTerminationStatus termStatus, int statusCode) {
+        QString status;
+        switch (termStatus) {
+        case QWebEnginePage::NormalTerminationStatus:
+            status = tr("Render process normal exit");
+            break;
+        case QWebEnginePage::AbnormalTerminationStatus:
+            status = tr("Render process abnormal exit");
+            break;
+        case QWebEnginePage::CrashedTerminationStatus:
+            status = tr("Render process crashed");
+            break;
+        case QWebEnginePage::KilledTerminationStatus:
+            status = tr("Render process killed");
+            break;
+        }
+        QMessageBox::critical(window(), status, tr("Render process exited with code: %1").arg(statusCode));
+        QTimer::singleShot(0, [this] { reload(); });
+    });
+}
+
+void WebView::setPage(WebPage *page)
+{
+    createWebActionTrigger(page,QWebEnginePage::Forward);
+    createWebActionTrigger(page,QWebEnginePage::Back);
+    createWebActionTrigger(page,QWebEnginePage::Reload);
+    createWebActionTrigger(page,QWebEnginePage::Stop);
+    QWebEngineView::setPage(page);
+}
+
+QIcon WebView::icon() const
+{
+    if (!m_icon.isNull())
+        return m_icon;
+    return QIcon(QLatin1String(":defaulticon.png"));
+}
+
+int WebView::loadProgress() const
+{
+    return m_loadProgress;
+}
+
+void WebView::createWebActionTrigger(QWebEnginePage *page, QWebEnginePage::WebAction webAction)
+{
+    QAction *action = page->action(webAction);
+    connect(action, &QAction::changed, [this, action, webAction]{
+        emit webActionEnabledChanged(webAction, action->isEnabled());
+    });
+}
+
+bool WebView::isWebActionEnabled(QWebEnginePage::WebAction webAction) const
+{
+    return page()->action(webAction)->isEnabled();
+}
+
+QNetworkAccessManager &WebView::networkAccessManager()
+{
+    static QNetworkAccessManager networkAccessManager;
+    return networkAccessManager;
+}
+
+QWebEngineView *WebView::createWindow(QWebEnginePage::WebWindowType type)
+{
+    switch (type) {
+    case QWebEnginePage::WebBrowserTab: {
+        BrowserWindow *mainWindow = qobject_cast<BrowserWindow*>(window());
+        return mainWindow->tabWidget()->createTab();
+    }
+    case QWebEnginePage::WebBrowserWindow: {
+        BrowserWindow *mainWindow = new BrowserWindow();
+        Browser::instance().addWindow(mainWindow);
+        return mainWindow->currentTab();
+    }
+    case QWebEnginePage::WebDialog: {
+        WebPopupWindow *popup = new WebPopupWindow(page()->profile());
+        return popup->view();
+    }
+    }
+    return nullptr;
+}
+
+void WebView::contextMenuEvent(QContextMenuEvent *event)
+{
+    QMenu *menu = page()->createStandardContextMenu();
+    const QList<QAction*> actions = menu->actions();
+    auto it = std::find(actions.cbegin(), actions.cend(), page()->action(QWebEnginePage::OpenLinkInThisWindow));
+    if (it != actions.cend()) {
+        (*it)->setText(tr("Open Link in This Tab"));
+        ++it;
+        menu->insertAction(*it, page()->action(QWebEnginePage::OpenLinkInNewWindow));
+        menu->insertAction(*it, page()->action(QWebEnginePage::OpenLinkInNewTab));
+    }
+    menu->popup(event->globalPos());
+}
+
+void WebView::handleIconUrlChanged(const QUrl &url)
+{
+    QNetworkRequest iconRequest(url);
+#ifndef QT_NO_OPENSSL
+    QSslConfiguration conf = iconRequest.sslConfiguration();
+    conf.setPeerVerifyMode(QSslSocket::VerifyNone);
+    iconRequest.setSslConfiguration(conf);
+#endif
+    QNetworkReply *iconReply = networkAccessManager().get(iconRequest);
+    iconReply->setParent(this);
+    connect(iconReply, &QNetworkReply::finished, this, &WebView::handleIconLoaded);
+}
+
+void WebView::handleIconLoaded()
+{
+    QNetworkReply *iconReply = qobject_cast<QNetworkReply*>(sender());
+    if (iconReply && iconReply->error() == QNetworkReply::NoError) {
+        QByteArray data = iconReply->readAll();
+        QPixmap pixmap;
+        pixmap.loadFromData(data);
+        m_icon.addPixmap(pixmap);
+        iconReply->deleteLater();
+    } else {
+        m_icon = QIcon(QStringLiteral(":defaulticon.png"));
+    }
+    emit iconChanged(m_icon);
+}