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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "components/viz/host/hit_test/hit_test_query.h" |
| 6 |
| 7 #include "services/viz/hit_test/public/interfaces/hit_test_region_list.mojom.h" |
| 8 |
| 9 namespace viz { |
| 10 |
| 11 HitTestQuery::HitTestQuery() = default; |
| 12 |
| 13 HitTestQuery::~HitTestQuery() = default; |
| 14 |
| 15 Target HitTestQuery::FindTargetForLocation(const gfx::Point& location_in_root) { |
| 16 Target target; |
| 17 if (!aggregated_hit_test_region_list_size_) |
| 18 return target; |
| 19 |
| 20 FindTargetInRegionForLocation(location_in_root, |
| 21 aggregated_hit_test_region_list_, &target); |
| 22 return target; |
| 23 } |
| 24 |
| 25 bool HitTestQuery::FindTargetInRegionForLocation( |
| 26 const gfx::Point& location_in_parent, |
| 27 AggregatedHitTestRegion* region, |
| 28 Target* target) const { |
| 29 gfx::Point location_transformed(location_in_parent); |
| 30 region->transform.TransformPoint(&location_transformed); |
| 31 if (!region->rect.Contains(location_transformed)) |
| 32 return false; |
| 33 |
| 34 AggregatedHitTestRegion* child_region = region + 1; |
| 35 AggregatedHitTestRegion* child_region_end = |
| 36 child_region + region->child_count; |
| 37 if (child_region_end > (aggregated_hit_test_region_list_ + |
| 38 aggregated_hit_test_region_list_size_) || |
| 39 child_region_end < child_region) { |
| 40 return false; |
| 41 } |
| 42 |
| 43 gfx::Point location_in_target(location_transformed); |
| 44 location_in_target.Offset(-region->rect.x(), -region->rect.y()); |
| 45 while (child_region < child_region_end) { |
| 46 if (FindTargetInRegionForLocation(location_in_target, child_region, |
| 47 target)) { |
| 48 return true; |
| 49 } |
| 50 |
| 51 AggregatedHitTestRegion* next_child_region = |
| 52 child_region + child_region->child_count + 1; |
| 53 if (next_child_region <= child_region) |
| 54 return false; |
| 55 child_region = next_child_region; |
| 56 } |
| 57 |
| 58 if (region->flags & mojom::kHitTestMine) { |
| 59 target->frame_sink_id = region->frame_sink_id; |
| 60 target->location_in_target = location_in_target; |
| 61 target->flags = region->flags; |
| 62 return true; |
| 63 } |
| 64 return false; |
| 65 } |
| 66 |
| 67 } // namespace viz |
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