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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_LAYERS_TOUCH_ACTION_REGION_H_
#define CC_LAYERS_TOUCH_ACTION_REGION_H_
#include "base/containers/flat_map.h"
#include "cc/base/region.h"
#include "cc/cc_export.h"
#include "cc/input/touch_action.h"
namespace cc {
class CC_EXPORT TouchActionRegion {
public:
TouchActionRegion();
TouchActionRegion(const TouchActionRegion& touch_action_region);
TouchActionRegion(TouchActionRegion&& touch_action_region);
~TouchActionRegion();
void Union(TouchAction, const gfx::Rect&);
// Return all regions with any touch action.
Region GetAllRegions() const;
const Region& GetRegionForTouchAction(TouchAction touch_action) const;
// Allow iteration over the regions.
base::flat_map<TouchAction, Region>::const_iterator begin() const {
return map_.cbegin();
}
base::flat_map<TouchAction, Region>::const_iterator end() const {
return map_.cend();
}
bool IsEmpty() const { return map_.empty(); }
// Returns the touch actions that we are sure will be allowed at the point
// by finding the intersection of all touch actions whose regions contain the
// given point. If the map is empty, |TouchAction::kAuto| is returned since no
// touch actions have been explicitly defined and the default touch action
// is auto.
TouchAction GetAllowedTouchAction(const gfx::Point&) const;
TouchActionRegion& operator=(const TouchActionRegion& other);
TouchActionRegion& operator=(TouchActionRegion&& other);
bool operator==(const TouchActionRegion& other) const;
private:
base::flat_map<TouchAction, Region> map_;
};
} // namespace cc
#endif // CC_LAYERS_TOUCH_ACTION_REGION_H_
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