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/*
* Copyright (C) 2011, 2012 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) 2011 Benjamin Poulain <benjamin@webkit.org>
*
* 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 program 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 program; 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 PageViewportControllerClientQt_h
#define PageViewportControllerClientQt_h
#include "PageViewportController.h"
#include "PageViewportControllerClient.h"
#include <QObject>
#include <QPointF>
#include <QScopedPointer>
#include <QVariant>
#include <QVariantAnimation>
QT_BEGIN_NAMESPACE
class QRectF;
QT_END_NAMESPACE
class QQuickWebPage;
class QQuickWebView;
class QWebKitTest;
namespace WebKit {
class PageViewportControllerClientQt : public QObject, public PageViewportControllerClient {
Q_OBJECT
public:
PageViewportControllerClientQt(QQuickWebView*, QQuickWebPage*);
~PageViewportControllerClientQt();
virtual void setViewportPosition(const WebCore::FloatPoint& contentsPoint);
virtual void setPageScaleFactor(float);
virtual void didChangeContentsSize(const WebCore::IntSize&);
virtual void didChangeVisibleContents();
virtual void didChangeViewportAttributes();
virtual void setController(PageViewportController* controller) { m_controller = controller; }
// Additional methods currently only relevant in the QQuick context.
void touchBegin();
void touchEnd();
bool scrollAnimationActive() const;
void cancelScrollAnimation();
void panGestureStarted(const QPointF& position, qint64 eventTimestampMillis);
void panGestureRequestUpdate(const QPointF& position, qint64 eventTimestampMillis);
void panGestureEnded(const QPointF& position, qint64 eventTimestampMillis);
void panGestureCancelled();
bool scaleAnimationActive() const;
void interruptScaleAnimation();
void pinchGestureStarted(const QPointF& pinchCenterInViewportCoordinates);
void pinchGestureRequestUpdate(const QPointF& pinchCenterInViewportCoordinates, qreal totalScaleFactor);
void pinchGestureEnded();
void pinchGestureCancelled();
void zoomToAreaGestureEnded(const QPointF& touchPoint, const QRectF& targetArea);
void focusEditableArea(const QRectF& caretArea, const QRectF& targetArea);
private Q_SLOTS:
// Respond to changes of position that are not driven by us.
void pageItemPositionChanged();
void scaleAnimationStateChanged(QAbstractAnimation::State, QAbstractAnimation::State);
void flickMoveStarted(); // Called when panning starts.
void flickMoveEnded(); // Called when panning (+ kinetic animation) ends.
private:
class ScaleAnimation : public QVariantAnimation {
PageViewportControllerClientQt* m_controllerClient;
public:
ScaleAnimation(PageViewportControllerClientQt* parent)
: QVariantAnimation(parent)
, m_controllerClient(parent)
{ }
virtual void updateCurrentValue(const QVariant&);
};
class ViewportInteractionTracker {
public:
ViewportInteractionTracker(PageViewportControllerClientQt* client, bool shouldSuspend = true)
: m_controllerClient(client)
, m_shouldSuspend(shouldSuspend)
, m_inProgress(false)
{ }
void begin();
void end();
bool inProgress() const { return m_inProgress; }
private:
PageViewportControllerClientQt* m_controllerClient;
bool m_shouldSuspend;
bool m_inProgress;
};
struct ScaleStackItem {
ScaleStackItem(qreal scale, qreal xPosition)
: scale(scale)
, xPosition(xPosition)
{ }
qreal scale;
qreal xPosition;
};
friend class ViewportInteractionTracker;
friend class ScaleAnimation;
friend class ::QWebKitTest;
PageViewportController* m_controller;
QQuickWebView* const m_viewportItem;
QQuickWebPage* const m_pageItem;
float viewportScaleForRect(const QRectF&) const;
QRectF nearestValidVisibleContentsRect() const;
void setContentsRectToNearestValidBounds();
void updateViewportController(const QPointF& trajectory = QPointF());
void setContentRectVisiblePositionAtScale(const QPointF& location, qreal itemScale);
void animateContentRectVisible(const QRectF& contentRect);
void scaleContent(qreal itemScale, const QPointF& centerInCSSCoordinates = QPointF());
void clearRelativeZoomState();
ViewportInteractionTracker m_scaleChange;
ViewportInteractionTracker m_scrollChange;
ViewportInteractionTracker m_touchInteraction;
ScaleAnimation* m_scaleAnimation;
QPointF m_lastPinchCenterInViewportCoordinates;
QPointF m_lastScrollPosition;
int m_activeInteractionCount;
qreal m_pinchStartScale;
qreal m_lastCommittedScale;
qreal m_zoomOutScale;
QList<ScaleStackItem> m_scaleStack;
};
} // namespace WebKit
#endif // PageViewportControllerClientQt_h
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