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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 COMPONENTS_VIZ_SERVICE_HIT_TEST_HIT_TEST_MANAGER_H_
#define COMPONENTS_VIZ_SERVICE_HIT_TEST_HIT_TEST_MANAGER_H_
#include <map>
#include <optional>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "base/timer/elapsed_timer.h"
#include "components/viz/common/hit_test/aggregated_hit_test_region.h"
#include "components/viz/common/surfaces/surface_id.h"
#include "components/viz/service/surfaces/surface_manager.h"
#include "components/viz/service/surfaces/surface_observer.h"
#include "components/viz/service/viz_service_export.h"
namespace viz {
class LatestLocalSurfaceIdLookupDelegate;
// HitTestManager manages the collection of HitTestRegionList objects
// submitted in calls to SubmitCompositorFrame. This collection is
// used by HitTestAggregator.
class VIZ_SERVICE_EXPORT HitTestManager : public SurfaceObserver {
public:
explicit HitTestManager(SurfaceManager* surface_manager);
HitTestManager(const HitTestManager&) = delete;
HitTestManager& operator=(const HitTestManager&) = delete;
~HitTestManager() override;
// SurfaceObserver:
void OnSurfaceActivated(const SurfaceId& surface_id) override;
void OnSurfaceDestroyed(const SurfaceId& surface_id) override;
// Called when HitTestRegionList is submitted along with every call
// to SubmitCompositorFrame.
void SubmitHitTestRegionList(
const SurfaceId& surface_id,
const uint64_t frame_index,
std::optional<HitTestRegionList> hit_test_region_list);
// Returns the HitTestRegionList corresponding to the given
// |frame_sink_id| and the active CompositorFrame matched by frame_index.
// The returned pointer is not stable and should not be stored or used after
// calling any non-const methods on this class. ActiveFrameIndex is stored
// if |store_active_frame_index| is given, which is used to detect updates.
const HitTestRegionList* GetActiveHitTestRegionList(
LatestLocalSurfaceIdLookupDelegate* delegate,
const FrameSinkId& frame_sink_id,
uint64_t* store_active_frame_index = nullptr) const;
int64_t GetTraceId(const SurfaceId& id) const;
uint64_t submit_hit_test_region_list_index() const {
return submit_hit_test_region_list_index_;
}
void SetNeedsSubmit() { submit_hit_test_region_list_index_++; }
private:
bool ValidateHitTestRegionList(const SurfaceId& surface_id,
HitTestRegionList* hit_test_region_list);
const raw_ptr<SurfaceManager> surface_manager_;
std::map<SurfaceId, base::flat_map<uint64_t, HitTestRegionList>>
hit_test_region_lists_;
// Keeps track of the number of submitted HitTestRegionLists. This allows the
// HitTestAggregators to stay in sync with the HitTestManager and only
// aggregate when there is new hit-test data.
uint64_t submit_hit_test_region_list_index_ = 0;
};
} // namespace viz
#endif // COMPONENTS_VIZ_SERVICE_HIT_TEST_HIT_TEST_MANAGER_H_
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