| /* |
| * Copyright (C) 2011 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: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. AND ITS 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 GOOGLE INC. |
| * OR ITS 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 PageOverlay_h |
| #define PageOverlay_h |
| |
| #include "platform/graphics/GraphicsLayer.h" |
| #include "platform/graphics/GraphicsLayerClient.h" |
| #include "platform/graphics/paint/DisplayItemClient.h" |
| #include "web/WebExport.h" |
| #include "wtf/text/WTFString.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| class GraphicsContext; |
| class WebViewImpl; |
| |
| // Manages a layer that is overlaid on a WebView's content. |
| class WEB_EXPORT PageOverlay : public GraphicsLayerClient, public DisplayItemClient { |
| public: |
| class Delegate { |
| public: |
| virtual ~Delegate() { } |
| |
| // Paints page overlay contents. |
| virtual void paintPageOverlay(const PageOverlay&, GraphicsContext&, const WebSize& webViewSize) const = 0; |
| }; |
| |
| static std::unique_ptr<PageOverlay> create(WebViewImpl*, std::unique_ptr<PageOverlay::Delegate>); |
| |
| ~PageOverlay(); |
| |
| void update(); |
| |
| GraphicsLayer* graphicsLayer() const { return m_layer.get(); } |
| |
| // DisplayItemClient methods. |
| String debugName() const final { return "PageOverlay"; } |
| LayoutRect visualRect() const override; |
| |
| // GraphicsLayerClient implementation |
| bool needsRepaint(const GraphicsLayer&) const { return true; } |
| IntRect computeInterestRect(const GraphicsLayer*, const IntRect&) const override; |
| void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& interestRect) const override; |
| String debugName(const GraphicsLayer*) const override; |
| |
| private: |
| PageOverlay(WebViewImpl*, std::unique_ptr<PageOverlay::Delegate>); |
| |
| WebViewImpl* m_viewImpl; |
| std::unique_ptr<PageOverlay::Delegate> m_delegate; |
| std::unique_ptr<GraphicsLayer> m_layer; |
| }; |
| |
| } // namespace blink |
| |
| #endif // PageOverlay_h |