| /* |
| * 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 |