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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_CANVAS2D_HIT_REGION_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_CANVAS2D_HIT_REGION_H_
#include "base/macros.h"
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/modules/canvas/canvas2d/hit_region_options.h"
#include "third_party/blink/renderer/platform/graphics/path.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/linked_hash_set.h"
namespace blink {
class HitRegion final : public GarbageCollected<HitRegion> {
public:
HitRegion(const Path&, const HitRegionOptions*);
virtual ~HitRegion() = default;
void RemovePixels(const Path&);
bool Contains(const FloatPoint&) const;
const String& Id() const { return id_; }
const Path& GetPath() const { return path_; }
Element* Control() const { return control_.Get(); }
void Trace(blink::Visitor*);
private:
String id_;
Member<Element> control_;
Path path_;
WindRule fill_rule_;
};
class HitRegionManager final : public GarbageCollected<HitRegionManager> {
public:
HitRegionManager() = default;
~HitRegionManager() {}
void AddHitRegion(HitRegion*);
void RemoveHitRegion(HitRegion*);
void RemoveHitRegionById(const String& id);
void RemoveHitRegionByControl(const Element*);
void RemoveHitRegionsInRect(const FloatRect&, const AffineTransform&);
void RemoveAllHitRegions();
HitRegion* GetHitRegionById(const String& id) const;
HitRegion* GetHitRegionByControl(const Element*) const;
HitRegion* GetHitRegionAtPoint(const FloatPoint&) const;
unsigned GetHitRegionsCount() const;
void Trace(blink::Visitor*);
private:
typedef HeapLinkedHashSet<Member<HitRegion>> HitRegionList;
typedef HitRegionList::const_reverse_iterator HitRegionIterator;
typedef HeapHashMap<String, Member<HitRegion>> HitRegionIdMap;
typedef HeapHashMap<Member<const Element>, Member<HitRegion>>
HitRegionControlMap;
HitRegionList hit_region_list_;
HitRegionIdMap hit_region_id_map_;
HitRegionControlMap hit_region_control_map_;
DISALLOW_COPY_AND_ASSIGN(HitRegionManager);
};
} // namespace blink
#endif
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