1/*
2 * Copyright (C) 2012 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef LinkHighlight_h
27#define LinkHighlight_h
28
29#include "platform/geometry/FloatPoint.h"
30#include "platform/geometry/IntPoint.h"
31#include "platform/graphics/GraphicsLayer.h"
32#include "platform/graphics/Path.h"
33#include "public/platform/WebCompositorAnimationDelegate.h"
34#include "public/platform/WebContentLayer.h"
35#include "public/platform/WebContentLayerClient.h"
36#include "public/platform/WebLayer.h"
37#include "wtf/OwnPtr.h"
38#include "wtf/Vector.h"
39
40namespace blink {
41
42class Node;
43class RenderLayer;
44class RenderObject;
45struct WebFloatRect;
46struct WebRect;
47class WebViewImpl;
48
49class LinkHighlight FINAL : public WebContentLayerClient, public WebCompositorAnimationDelegate, blink::LinkHighlightClient {
50public:
51    static PassOwnPtr<LinkHighlight> create(Node*, WebViewImpl*);
52    virtual ~LinkHighlight();
53
54    WebContentLayer* contentLayer();
55    WebLayer* clipLayer();
56    void startHighlightAnimationIfNeeded();
57    void updateGeometry();
58
59    // WebContentLayerClient implementation.
60    virtual void paintContents(WebCanvas*, const WebRect& clipRect, bool canPaintLCDText, WebContentLayerClient::GraphicsContextStatus) OVERRIDE;
61
62    // WebCompositorAnimationDelegate implementation.
63    virtual void notifyAnimationStarted(double monotonicTime, blink::WebCompositorAnimation::TargetProperty) OVERRIDE;
64    virtual void notifyAnimationFinished(double monotonicTime, blink::WebCompositorAnimation::TargetProperty) OVERRIDE;
65
66    // LinkHighlightClient inplementation.
67    virtual void invalidate() OVERRIDE;
68    virtual WebLayer* layer() OVERRIDE;
69    virtual void clearCurrentGraphicsLayer() OVERRIDE;
70
71    GraphicsLayer* currentGraphicsLayerForTesting() const { return m_currentGraphicsLayer; }
72
73private:
74    LinkHighlight(Node*, WebViewImpl*);
75
76    void releaseResources();
77    void computeQuads(RenderObject&, WTF::Vector<FloatQuad>&) const;
78
79    RenderLayer* computeEnclosingCompositingLayer();
80    void clearGraphicsLayerLinkHighlightPointer();
81    // This function computes the highlight path, and returns true if it has changed
82    // size since the last call to this function.
83    bool computeHighlightLayerPathAndPosition(RenderLayer*);
84
85    OwnPtr<WebContentLayer> m_contentLayer;
86    OwnPtr<WebLayer> m_clipLayer;
87    Path m_path;
88
89    RefPtrWillBePersistent<Node> m_node;
90    WebViewImpl* m_owningWebViewImpl;
91    GraphicsLayer* m_currentGraphicsLayer;
92
93    bool m_geometryNeedsUpdate;
94    bool m_isAnimating;
95    double m_startTime;
96};
97
98} // namespace blink
99
100#endif
101