| /* |
| * 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 <memory> |
| #include "platform/graphics/GraphicsLayer.h" |
| #include "platform/graphics/GraphicsLayerClient.h" |
| #include "platform/graphics/paint/DisplayItemClient.h" |
| #include "platform/wtf/text/WTFString.h" |
| #include "web/WebExport.h" |
| |
| namespace blink { |
| |
| class GraphicsContext; |
| class WebLocalFrameImpl; |
| |
| // Manages a layer that is overlaid on a WebLocalFrame'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& web_view_size) const = 0; |
| }; |
| |
| static std::unique_ptr<PageOverlay> Create( |
| WebLocalFrameImpl*, |
| std::unique_ptr<PageOverlay::Delegate>); |
| |
| ~PageOverlay(); |
| |
| void Update(); |
| |
| GraphicsLayer* GetGraphicsLayer() const { return 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& interest_rect) const override; |
| String DebugName(const GraphicsLayer*) const override; |
| |
| private: |
| PageOverlay(WebLocalFrameImpl*, std::unique_ptr<PageOverlay::Delegate>); |
| |
| Persistent<WebLocalFrameImpl> frame_impl_; |
| std::unique_ptr<PageOverlay::Delegate> delegate_; |
| std::unique_ptr<GraphicsLayer> layer_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // PageOverlay_h |