webview.cpp Example File

  /****************************************************************************
  **
  ** 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 <QDebug>
  #include <QMenu>
  #include <QMessageBox>
  #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) {
              m_loadProgress = 0;
          }
      });

      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::StandardButton btn = QMessageBox::question(window(), status,
                                                     tr("Render process exited with code: %1\n"
                                                        "Do you want to reload the page ?").arg(statusCode));
          if (btn == QMessageBox::Yes)
              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);
  }

  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();
  }

  QWebEngineView *WebView::createWindow(QWebEnginePage::WebWindowType type)
  {
      switch (type) {
      case QWebEnginePage::WebBrowserTab: {
          BrowserWindow *mainWindow = qobject_cast<BrowserWindow*>(window());
          return mainWindow->tabWidget()->createTab();
      }
      case QWebEnginePage::WebBrowserBackgroundTab: {
          BrowserWindow *mainWindow = qobject_cast<BrowserWindow*>(window());
          return mainWindow->tabWidget()->createTab(false);
      }
      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;
          QAction *before(it == actions.cend() ? nullptr : *it);
          menu->insertAction(before, page()->action(QWebEnginePage::OpenLinkInNewWindow));
          menu->insertAction(before, page()->action(QWebEnginePage::OpenLinkInNewTab));
      }
      connect(menu, &QMenu::aboutToHide, menu, &QObject::deleteLater);
      menu->popup(event->globalPos());
  }