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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef SKY_ENGINE_CORE_HTML_CANVAS_MOUSEEVENTHITREGION_H_
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#define SKY_ENGINE_CORE_HTML_CANVAS_MOUSEEVENTHITREGION_H_
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#include "sky/engine/core/events/MouseEvent.h"
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#include "sky/engine/core/html/HTMLCanvasElement.h"
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#include "sky/engine/core/html/canvas/CanvasRenderingContext.h"
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#include "sky/engine/core/html/canvas/CanvasRenderingContext2D.h"
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namespace blink {
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class MouseEventHitRegion {
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public:
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static String region(MouseEvent& event)
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{
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if (!event.target() || !isHTMLCanvasElement(event.target()->toNode()))
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return String();
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HTMLCanvasElement* canvas = toHTMLCanvasElement(event.target()->toNode());
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CanvasRenderingContext* context = canvas->renderingContext();
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if (!context || !context->is2d())
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return String();
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HitRegion* hitRegion = toCanvasRenderingContext2D(context)->
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hitRegionAtPoint(LayoutPoint(event.offsetX(), event.offsetY()));
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if (!hitRegion)
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return String();
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String id = hitRegion->id();
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if (id.isEmpty())
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return String();
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return id;
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}
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_HTML_CANVAS_MOUSEEVENTHITREGION_H_
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