[Widgets] RenderWidgetHostViewQtDelegate refactoring

Break up the delegate implementation into two distinct subclasses.
The first one offers a way for the WebPage to tap into the
RenderWidgetHostView directly, while a different implementation
that is backed by a top-level widget can be used to show WebUI
popups on screen.

This has the benefit of not having a child widget in the webview
among other things. It also fixes our popups and allows them to fall
outside the window frame.

Change-Id: I80dc1e4f21bb91ff47c75a626d330f88eacce8c6
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 158 insertions, 0 deletions

diff --git a/src/webenginewidgets/render_widget_host_view_qt_delegate_popup.cpp b/src/webenginewidgets/render_widget_host_view_qt_delegate_popup.cpp
new file mode 100644
index 000000000..7900ed9b5
--- /dev/null
+++ b/src/webenginewidgets/render_widget_host_view_qt_delegate_popup.cpp
@@ -0,0 +1,158 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "render_widget_host_view_qt_delegate_popup.h"
+
+#include "qwebengineview.h"
+#include "qwebenginepage_p.h"
+#include <QtGlobal>
+#include <QLayout>
+#include <QResizeEvent>
+#include <QPainter>
+#include <QPaintEvent>
+#include <QWindow>
+#include <QtWidgets/QApplication>
+
+RenderWidgetHostViewQtDelegatePopup::RenderWidgetHostViewQtDelegatePopup(RenderWidgetHostViewQtDelegateClient *client, QWidget *parent)
+    : m_client(client)
+    , m_parentView(parent)
+{
+    setMouseTracking(true);
+    setAttribute(Qt::WA_AcceptTouchEvents);
+    // The keyboard events are supposed to go to the parent RenderHostView
+    // so the WebUI popups should never have focus. Besides, if the parent view
+    // loses focus, WebKit will cause its associated popups (including this one)
+    // to be destroyed.
+    setAttribute(Qt::WA_ShowWithoutActivating);
+    setFocusPolicy(Qt::NoFocus);
+    setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint | Qt::WindowDoesNotAcceptFocus);
+}
+
+void RenderWidgetHostViewQtDelegatePopup::initAsChild(WebContentsAdapterClient*)
+{
+    Q_UNREACHABLE();
+}
+
+void RenderWidgetHostViewQtDelegatePopup::initAsPopup(const QRect& rect)
+{
+    QPoint pos = m_parentView ? m_parentView->mapToGlobal(rect.topLeft()) : QPoint(0,0);
+    QRect qrect = QRect(pos, rect.size());
+    setGeometry(qrect);
+    raise();
+    show();
+}
+
+QRectF RenderWidgetHostViewQtDelegatePopup::screenRect() const
+{
+    return QRectF(x(), y(), width(), height());
+}
+
+void RenderWidgetHostViewQtDelegatePopup::setKeyboardFocus()
+{
+    Q_UNREACHABLE();
+}
+
+bool RenderWidgetHostViewQtDelegatePopup::hasKeyboardFocus()
+{
+    return false;
+}
+
+void RenderWidgetHostViewQtDelegatePopup::show()
+{
+    QWidget::show();
+}
+
+void RenderWidgetHostViewQtDelegatePopup::hide()
+{
+    QWidget::hide();
+}
+
+bool RenderWidgetHostViewQtDelegatePopup::isVisible() const
+{
+    return QWidget::isVisible();
+}
+
+QWindow* RenderWidgetHostViewQtDelegatePopup::window() const
+{
+    const QWidget* root = QWidget::window();
+    return root ? root->windowHandle() : Q_NULLPTR;
+}
+
+void RenderWidgetHostViewQtDelegatePopup::update(const QRect& rect)
+{
+    QWidget::update(rect);
+}
+
+void RenderWidgetHostViewQtDelegatePopup::updateCursor(const QCursor &cursor)
+{
+    QWidget::setCursor(cursor);
+}
+
+void RenderWidgetHostViewQtDelegatePopup::resize(int width, int height)
+{
+    QWidget::resize(width, height);
+}
+
+void RenderWidgetHostViewQtDelegatePopup::move(const QPoint &pos)
+{
+    QPoint mapped = m_parentView ? m_parentView->mapToGlobal(pos) : pos;
+    QWidget::move(mapped);
+}
+
+void RenderWidgetHostViewQtDelegatePopup::paintEvent(QPaintEvent *event)
+{
+    QPainter painter(this);
+    m_client->fetchBackingStore();
+    m_client->paint(&painter, event->rect());
+}
+
+void RenderWidgetHostViewQtDelegatePopup::resizeEvent(QResizeEvent *resizeEvent)
+{
+    Q_UNUSED(resizeEvent);
+    m_client->notifyResize();
+}
+
+bool RenderWidgetHostViewQtDelegatePopup::event(QEvent *event)
+{
+    if (!m_client->forwardEvent(event))
+        return QWidget::event(event);
+    return true;
+}