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/*
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef PageClientQt_h
#define PageClientQt_h
#include "FrameView.h"
#include "GraphicsContext.h"
#include "IntRect.h"
#include "QWebPageClient.h"
#include "TiledBackingStore.h"
#include "qgraphicswebview.h"
#include "qwebframe.h"
#include "qwebframe_p.h"
#include "qwebpage.h"
#include "qwebpage_p.h"
#include <QtCore/qmetaobject.h>
#include <QtCore/qsharedpointer.h>
#include <QtGui/qgraphicsscene.h>
#include <QtGui/qgraphicsview.h>
#include <QtGui/qgraphicswidget.h>
#include <QtGui/qscrollbar.h>
#include <QtGui/qstyleoption.h>
#include <QtGui/qwidget.h>
#include <Settings.h>
namespace WebCore {
class PageClientQWidget : public QWebPageClient {
public:
PageClientQWidget(QWidget* view)
: view(view)
{
Q_ASSERT(view);
}
virtual bool isQWidgetClient() const { return true; }
virtual void scroll(int dx, int dy, const QRect&);
virtual void update(const QRect& dirtyRect);
virtual void setInputMethodEnabled(bool enable);
virtual bool inputMethodEnabled() const;
virtual void setInputMethodHints(Qt::InputMethodHints hints);
#ifndef QT_NO_CURSOR
virtual QCursor cursor() const;
virtual void updateCursor(const QCursor& cursor);
#endif
virtual QPalette palette() const;
virtual int screenNumber() const;
virtual QWidget* ownerWidget() const;
virtual QRect geometryRelativeToOwnerWidget() const;
virtual QObject* pluginParent() const;
virtual QStyle* style() const;
virtual bool viewResizesToContentsEnabled() const { return false; }
virtual QRectF windowRect() const;
QWidget* view;
};
// the overlay is here for one reason only: to have the scroll-bars and other
// extra UI elements appear on top of any QGraphicsItems created by CSS compositing layers
class QGraphicsItemOverlay : public QGraphicsItem {
public:
QGraphicsItemOverlay(QGraphicsWidget* view, QWebPage* p)
:QGraphicsItem(view)
, q(view)
, page(p)
{
setPos(0, 0);
setFlag(QGraphicsItem::ItemUsesExtendedStyleOption, true);
setCacheMode(QGraphicsItem::DeviceCoordinateCache);
}
QRectF boundingRect() const
{
return q->boundingRect();
}
void paint(QPainter* painter, const QStyleOptionGraphicsItem* options, QWidget*)
{
page->mainFrame()->render(painter, static_cast<QWebFrame::RenderLayer>(QWebFrame::AllLayers&(~QWebFrame::ContentsLayer)), options->exposedRect.toRect());
}
void prepareGraphicsItemGeometryChange()
{
prepareGeometryChange();
}
QGraphicsWidget* q;
QWebPage* page;
};
class PageClientQGraphicsWidget : public QWebPageClient {
public:
PageClientQGraphicsWidget(QGraphicsWebView* v, QWebPage* p)
: view(v)
, page(p)
, viewResizesToContents(false)
#if USE(ACCELERATED_COMPOSITING)
, shouldSync(false)
#endif
{
Q_ASSERT(view);
#if USE(ACCELERATED_COMPOSITING)
// the overlay and stays alive for the lifetime of
// this QGraphicsWebView as the scrollbars are needed when there's no compositing
view->setFlag(QGraphicsItem::ItemUsesExtendedStyleOption);
syncMetaMethod = view->metaObject()->method(view->metaObject()->indexOfMethod("syncLayers()"));
#endif
}
virtual ~PageClientQGraphicsWidget();
virtual bool isQWidgetClient() const { return false; }
virtual void scroll(int dx, int dy, const QRect&);
virtual void update(const QRect& dirtyRect);
virtual void setInputMethodEnabled(bool enable);
virtual bool inputMethodEnabled() const;
virtual void setInputMethodHints(Qt::InputMethodHints hints);
#ifndef QT_NO_CURSOR
virtual QCursor cursor() const;
virtual void updateCursor(const QCursor& cursor);
#endif
virtual QPalette palette() const;
virtual int screenNumber() const;
virtual QWidget* ownerWidget() const;
virtual QRect geometryRelativeToOwnerWidget() const;
virtual QObject* pluginParent() const;
virtual QStyle* style() const;
virtual bool viewResizesToContentsEnabled() const { return viewResizesToContents; }
void createOrDeleteOverlay();
#if ENABLE(TILED_BACKING_STORE)
void updateTiledBackingStoreScale();
virtual QRectF graphicsItemVisibleRect() const;
#endif
#if USE(ACCELERATED_COMPOSITING)
virtual void setRootGraphicsLayer(QGraphicsItem* layer);
virtual void markForSync(bool scheduleSync);
void updateCompositingScrollPosition();
void syncLayers();
// QGraphicsWebView can render composited layers
virtual bool allowsAcceleratedCompositing() const { return true; }
#endif
virtual QRectF windowRect() const;
QGraphicsWebView* view;
QWebPage* page;
bool viewResizesToContents;
#if USE(ACCELERATED_COMPOSITING)
QWeakPointer<QGraphicsObject> rootGraphicsLayer;
// we have to flush quite often, so we use a meta-method instead of QTimer::singleShot for putting the event in the queue
QMetaMethod syncMetaMethod;
// we need to sync the layers if we get a special call from the WebCore
// compositor telling us to do so. We'll get that call from ChromeClientQt
bool shouldSync;
#endif
// the overlay gets instantiated when the root layer is attached, and get deleted when it's detached
QSharedPointer<QGraphicsItemOverlay> overlay;
// we need to put the root graphics layer behind the overlay (which contains the scrollbar)
enum { RootGraphicsLayerZValue, OverlayZValue };
};
}
#endif // PageClientQt
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