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| 1 /* | |
| 2 * Copyright (C) 2011 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 are | |
| 6 * met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * | |
| 11 * 2. Redistributions in binary form must reproduce the above | |
| 12 * copyright notice, this list of conditions and the following disclaimer | |
| 13 * in the documentation and/or other materials provided with the | |
| 14 * distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. AND ITS CONTRIBUTORS | |
| 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC. | |
| 20 * OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include "config.h" | |
| 30 #include "web/PageOverlay.h" | |
| 31 | |
| 32 #include "core/frame/Settings.h" | |
| 33 #include "core/page/Page.h" | |
| 34 #include "platform/graphics/GraphicsContext.h" | |
| 35 #include "platform/graphics/GraphicsLayer.h" | |
| 36 #include "platform/graphics/GraphicsLayerClient.h" | |
| 37 #include "public/platform/WebLayer.h" | |
| 38 #include "public/web/WebPageOverlay.h" | |
| 39 #include "public/web/WebViewClient.h" | |
| 40 #include "web/WebViewImpl.h" | |
| 41 | |
| 42 namespace blink { | |
| 43 | |
| 44 namespace { | |
| 45 | |
| 46 WebCanvas* ToWebCanvas(GraphicsContext* gc) | |
| 47 { | |
| 48 return gc->canvas(); | |
| 49 } | |
| 50 | |
| 51 } // namespace | |
| 52 | |
| 53 PassOwnPtr<PageOverlay> PageOverlay::create(WebViewImpl* viewImpl, WebPageOverla
y* overlay) | |
| 54 { | |
| 55 return adoptPtr(new PageOverlay(viewImpl, overlay)); | |
| 56 } | |
| 57 | |
| 58 PageOverlay::PageOverlay(WebViewImpl* viewImpl, WebPageOverlay* overlay) | |
| 59 : m_viewImpl(viewImpl) | |
| 60 , m_overlay(overlay) | |
| 61 , m_zOrder(0) | |
| 62 { | |
| 63 } | |
| 64 | |
| 65 class OverlayGraphicsLayerClientImpl : public GraphicsLayerClient { | |
| 66 public: | |
| 67 static PassOwnPtr<OverlayGraphicsLayerClientImpl> create(WebPageOverlay* ove
rlay) | |
| 68 { | |
| 69 return adoptPtr(new OverlayGraphicsLayerClientImpl(overlay)); | |
| 70 } | |
| 71 | |
| 72 virtual ~OverlayGraphicsLayerClientImpl() { } | |
| 73 | |
| 74 virtual void notifyAnimationStarted(const GraphicsLayer*, double monotonicTi
me) override { } | |
| 75 | |
| 76 virtual void paintContents(const GraphicsLayer*, GraphicsContext& gc, Graphi
csLayerPaintingPhase, const IntRect& inClip) | |
| 77 { | |
| 78 gc.save(); | |
| 79 m_overlay->paintPageOverlay(ToWebCanvas(&gc)); | |
| 80 gc.restore(); | |
| 81 } | |
| 82 | |
| 83 virtual String debugName(const GraphicsLayer* graphicsLayer) override | |
| 84 { | |
| 85 return String("WebViewImpl Page Overlay Content Layer"); | |
| 86 } | |
| 87 | |
| 88 private: | |
| 89 explicit OverlayGraphicsLayerClientImpl(WebPageOverlay* overlay) | |
| 90 : m_overlay(overlay) | |
| 91 { | |
| 92 } | |
| 93 | |
| 94 WebPageOverlay* m_overlay; | |
| 95 }; | |
| 96 | |
| 97 void PageOverlay::clear() | |
| 98 { | |
| 99 invalidateWebFrame(); | |
| 100 | |
| 101 if (m_layer) { | |
| 102 m_layer->removeFromParent(); | |
| 103 m_layer = nullptr; | |
| 104 m_layerClient = nullptr; | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 void PageOverlay::update() | |
| 109 { | |
| 110 invalidateWebFrame(); | |
| 111 | |
| 112 if (!m_layer) { | |
| 113 m_layerClient = OverlayGraphicsLayerClientImpl::create(m_overlay); | |
| 114 m_layer = GraphicsLayer::create(m_viewImpl->graphicsLayerFactory(), m_la
yerClient.get()); | |
| 115 m_layer->setDrawsContent(true); | |
| 116 | |
| 117 // This is required for contents of overlay to stay in sync with the pag
e while scrolling. | |
| 118 WebLayer* platformLayer = m_layer->platformLayer(); | |
| 119 platformLayer->setShouldScrollOnMainThread(true); | |
| 120 } | |
| 121 | |
| 122 FloatSize size(m_viewImpl->size()); | |
| 123 if (size != m_layer->size()) { | |
| 124 // Triggers re-adding to root layer to ensure that we are on top of | |
| 125 // scrollbars. | |
| 126 m_layer->removeFromParent(); | |
| 127 m_layer->setSize(size); | |
| 128 } | |
| 129 | |
| 130 m_viewImpl->setOverlayLayer(m_layer.get()); | |
| 131 m_layer->setNeedsDisplay(); | |
| 132 } | |
| 133 | |
| 134 void PageOverlay::paintWebFrame(GraphicsContext& gc) | |
| 135 { | |
| 136 if (!m_viewImpl->isAcceleratedCompositingActive()) { | |
| 137 gc.save(); | |
| 138 m_overlay->paintPageOverlay(ToWebCanvas(&gc)); | |
| 139 gc.restore(); | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 void PageOverlay::invalidateWebFrame() | |
| 144 { | |
| 145 // WebPageOverlay does the actual painting of the overlay. | |
| 146 // Here we just make sure to invalidate. | |
| 147 if (!m_viewImpl->isAcceleratedCompositingActive()) { | |
| 148 // FIXME: able to invalidate a smaller rect. | |
| 149 // FIXME: Is it important to just invalidate a smaller rect given that | |
| 150 // this is not on a critical codepath? In order to do so, we'd | |
| 151 // have to take scrolling into account. | |
| 152 const WebSize& size = m_viewImpl->size(); | |
| 153 WebRect damagedRect(0, 0, size.width, size.height); | |
| 154 if (m_viewImpl->client()) | |
| 155 m_viewImpl->client()->didInvalidateRect(damagedRect); | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 } // namespace blink | |
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