Remove pinch viewports.

sky/engine/core/frame/PinchViewport.h

-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * 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 Google Inc. 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.
- */
-
-#ifndef PinchViewport_h
-#define PinchViewport_h
-
-#include "platform/geometry/FloatPoint.h"
-#include "platform/geometry/FloatRect.h"
-#include "platform/geometry/IntSize.h"
-#include "platform/graphics/GraphicsLayerClient.h"
-#include "platform/scroll/ScrollableArea.h"
-#include "public/platform/WebScrollbar.h"
-#include "public/platform/WebSize.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassOwnPtr.h"
-
-namespace blink {
-class WebLayerTreeView;
-class WebScrollbarLayer;
-}
-
-namespace blink {
-
-class FrameHost;
-class GraphicsContext;
-class GraphicsLayer;
-class GraphicsLayerFactory;
-class IntRect;
-class IntSize;
-class LocalFrame;
-
-// Represents the pinch-to-zoom viewport the user is currently seeing the page through. This
-// class corresponds to the InnerViewport on the compositor. It is a ScrollableArea; it's
-// offset is set through the GraphicsLayer <-> CC sync mechanisms. Its contents is the page's
-// main FrameView, which corresponds to the outer viewport. The inner viewport is always contained
-// in the outer viewport and can pan within it.
-class PinchViewport final : public GraphicsLayerClient, public ScrollableArea {
-public:
-    explicit PinchViewport(FrameHost&);
-    virtual ~PinchViewport();
-
-    void attachToLayerTree(GraphicsLayer*, GraphicsLayerFactory*);
-    GraphicsLayer* rootGraphicsLayer()
-    {
-        return m_rootTransformLayer.get();
-    }
-    GraphicsLayer* containerLayer()
-    {
-        return m_innerViewportContainerLayer.get();
-    }
-
-    // Sets the location of the inner viewport relative to the outer viewport. The
-    // coordinates are in partial CSS pixels.
-    void setLocation(const FloatPoint&);
-    void move(const FloatPoint&);
-
-    // Sets the size of the inner viewport when unscaled in CSS pixels.
-    // This will be clamped to the size of the outer viewport (the main frame).
-    void setSize(const IntSize&);
-    IntSize size() const { return m_size; }
-
-    // Resets the viewport to initial state.
-    void reset();
-
-    // Let the viewport know that the main frame changed size (either through screen
-    // rotation on Android or window resize elsewhere).
-    void mainFrameDidChangeSize();
-
-    void setScale(float);
-    float scale() const { return m_scale; }
-
-    void registerLayersWithTreeView(blink::WebLayerTreeView*) const;
-    void clearLayersForTreeView(blink::WebLayerTreeView*) const;
-
-    // The portion of the unzoomed frame visible in the inner "pinch" viewport,
-    // in partial CSS pixels. Relative to the main frame.
-    FloatRect visibleRect() const;
-
-    // The viewport rect relative to the document origin, in partial CSS pixels.
-    FloatRect visibleRectInDocument() const;
-
-    // Scroll the main frame and pinch viewport so that the given rect in the
-    // top-level document is centered in the viewport. This method will avoid
-    // scrolling the pinch viewport unless necessary.
-    void scrollIntoView(const FloatRect&);
-private:
-    // ScrollableArea implementation
-    virtual bool isActive() const override { return false; }
-    virtual int scrollSize(ScrollbarOrientation) const override;
-    virtual bool isScrollCornerVisible() const override { return false; }
-    virtual IntRect scrollCornerRect() const override { return IntRect(); }
-    virtual IntPoint scrollPosition() const override { return flooredIntPoint(m_offset); }
-    virtual IntPoint minimumScrollPosition() const override;
-    virtual IntPoint maximumScrollPosition() const override;
-    virtual int visibleHeight() const override { return visibleRect().height(); };
-    virtual int visibleWidth() const override { return visibleRect().width(); };
-    virtual IntSize contentsSize() const override;
-    virtual bool scrollbarsCanBeActive() const override { return false; }
-    virtual IntRect scrollableAreaBoundingBox() const override;
-    virtual bool userInputScrollable(ScrollbarOrientation) const override { return true; }
-    virtual bool shouldPlaceVerticalScrollbarOnLeft() const override { return false; }
-    virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) override;
-    virtual void invalidateScrollCornerRect(const IntRect&) override { }
-    virtual void setScrollOffset(const IntPoint&) override;
-    virtual GraphicsLayer* layerForContainer() const override;
-    virtual GraphicsLayer* layerForScrolling() const override;
-    virtual GraphicsLayer* layerForHorizontalScrollbar() const override;
-    virtual GraphicsLayer* layerForVerticalScrollbar() const override;
-
-    // GraphicsLayerClient implementation.
-    virtual void notifyAnimationStarted(const GraphicsLayer*, double monotonicTime) override;
-    virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& inClip) override;
-    virtual String debugName(const GraphicsLayer*) override;
-
-    void setupScrollbar(blink::WebScrollbar::Orientation);
-    FloatPoint clampOffsetToBoundaries(const FloatPoint&);
-
-    LocalFrame* mainFrame() const;
-
-    FrameHost& m_frameHost;
-    OwnPtr<GraphicsLayer> m_rootTransformLayer;
-    OwnPtr<GraphicsLayer> m_innerViewportContainerLayer;
-    OwnPtr<GraphicsLayer> m_pageScaleLayer;
-    OwnPtr<GraphicsLayer> m_innerViewportScrollLayer;
-    OwnPtr<GraphicsLayer> m_overlayScrollbarHorizontal;
-    OwnPtr<GraphicsLayer> m_overlayScrollbarVertical;
-    OwnPtr<blink::WebScrollbarLayer> m_webOverlayScrollbarHorizontal;
-    OwnPtr<blink::WebScrollbarLayer> m_webOverlayScrollbarVertical;
-
-    // Offset of the pinch viewport from the main frame's origin, in CSS pixels.
-    FloatPoint m_offset;
-    float m_scale;
-    IntSize m_size;
-};
-
-} // namespace blink
-
-#endif // PinchViewport_h