1 files changed, 114 insertions, 0 deletions
diff --git a/Source/WebKit2/UIProcess/CoordinatedGraphics/PageViewportController.h b/Source/WebKit2/UIProcess/CoordinatedGraphics/PageViewportController.h
new file mode 100644
index 000000000..e02d7671d
--- /dev/null
+++ b/Source/WebKit2/UIProcess/CoordinatedGraphics/PageViewportController.h
@@ -0,0 +1,114 @@
+/*
+ * 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 PageViewportController_h
+#define PageViewportController_h
+
+#include <WebCore/FloatPoint.h>
+#include <WebCore/FloatRect.h>
+#include <WebCore/FloatSize.h>
+#include <WebCore/ViewportArguments.h>
+#include <wtf/Noncopyable.h>
+
+namespace WebCore {
+class IntPoint;
+class IntSize;
+}
+
+namespace WebKit {
+
+class WebPageProxy;
+class PageViewportController;
+class PageViewportControllerClient;
+
+class PageViewportController {
+    WTF_MAKE_NONCOPYABLE(PageViewportController);
+
+public:
+    PageViewportController(WebKit::WebPageProxy*, PageViewportControllerClient&);
+    virtual ~PageViewportController() { }
+
+    float innerBoundedViewportScale(float) const;
+    float outerBoundedViewportScale(float) const;
+
+    WebCore::FloatPoint pixelAlignedFloatPoint(const WebCore::FloatPoint&);
+
+    WebCore::FloatPoint boundContentsPosition(const WebCore::FloatPoint&);
+    WebCore::FloatPoint boundContentsPositionAtScale(const WebCore::FloatPoint&, float scale);
+
+    WebCore::FloatSize visibleContentsSize() const;
+
+    bool hadUserInteraction() const { return m_hadUserInteraction; }
+    bool allowsUserScaling() const { return m_allowsUserScaling; }
+
+    WebCore::FloatSize contentsLayoutSize() const { return m_rawAttributes.layoutSize; }
+    float deviceScaleFactor() const;
+    float minimumScale() const { return m_minimumScaleToFit; }
+    float maximumScale() const { return m_rawAttributes.maximumScale; }
+    float currentScale() const { return m_pageScaleFactor; }
+
+    void setHadUserInteraction(bool didUserInteract) { m_hadUserInteraction = didUserInteract; }
+    void setInitiallyFitToViewport(bool initiallyFit) { m_initiallyFitToViewport = initiallyFit; }
+
+    // Notifications from the viewport.
+    void didChangeViewportSize(const WebCore::FloatSize& newSize);
+    void didChangeContentsVisibility(const WebCore::FloatPoint&, float scale, const WebCore::FloatPoint& trajectoryVector = WebCore::FloatPoint::zero());
+
+    // Notifications from the WebProcess.
+    void didCommitLoad();
+    void didChangeContentsSize(const WebCore::IntSize& newSize);
+    void didChangeViewportAttributes(const WebCore::ViewportAttributes&);
+    void didRenderFrame(const WebCore::IntSize& contentsSize, const WebCore::IntRect& coveredRect);
+    void pageTransitionViewportReady();
+    void pageDidRequestScroll(const WebCore::IntPoint& cssPosition);
+
+private:
+    bool syncVisibleContents(const WebCore::FloatPoint &trajectoryVector = WebCore::FloatPoint::zero());
+    void applyScaleAfterRenderingContents(float scale);
+    void applyPositionAfterRenderingContents(const WebCore::FloatPoint& pos);
+    bool updateMinimumScaleToFit(bool userInitiatedUpdate);
+
+    WebPageProxy* const m_webPageProxy;
+    PageViewportControllerClient& m_client;
+
+    WebCore::ViewportAttributes m_rawAttributes;
+
+    bool m_allowsUserScaling;
+    float m_minimumScaleToFit;
+    bool m_initiallyFitToViewport;
+
+    bool m_hadUserInteraction;
+
+    WebCore::FloatPoint m_contentsPosition;
+    WebCore::FloatSize m_contentsSize;
+    WebCore::FloatSize m_viewportSize;
+    WebCore::IntSize m_clientContentsSize;
+    float m_pageScaleFactor;
+
+    bool m_pendingPositionChange;
+    bool m_pendingScaleChange;
+    bool m_layerTreeStateIsFrozen;
+    WebCore::FloatRect m_lastFrameCoveredRect;
+};
+
+} // namespace WebKit
+
+#endif // PageViewportController_h