diff options
Diffstat (limited to 'cc/trees/layer_tree_host_common.cc')
| -rw-r--r-- | cc/trees/layer_tree_host_common.cc | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/cc/trees/layer_tree_host_common.cc b/cc/trees/layer_tree_host_common.cc index 8a5a552..a9af3ef 100644 --- a/cc/trees/layer_tree_host_common.cc +++ b/cc/trees/layer_tree_host_common.cc @@ -16,7 +16,6 @@ #include "cc/layers/render_surface_impl.h" #include "cc/trees/layer_sorter.h" #include "cc/trees/layer_tree_impl.h" -#include "ui/gfx/point_conversions.h" #include "ui/gfx/rect_conversions.h" #include "ui/gfx/transform.h" @@ -2427,220 +2426,4 @@ void LayerTreeHostCommon::CalculateDrawProperties( DCHECK(inputs->root_layer->render_surface()); } -static bool PointHitsRect( - const gfx::PointF& screen_space_point, - const gfx::Transform& local_space_to_screen_space_transform, - const gfx::RectF& local_space_rect) { - // If the transform is not invertible, then assume that this point doesn't hit - // this rect. - gfx::Transform inverse_local_space_to_screen_space( - gfx::Transform::kSkipInitialization); - if (!local_space_to_screen_space_transform.GetInverse( - &inverse_local_space_to_screen_space)) - return false; - - // Transform the hit test point from screen space to the local space of the - // given rect. - bool clipped = false; - gfx::PointF hit_test_point_in_local_space = MathUtil::ProjectPoint( - inverse_local_space_to_screen_space, screen_space_point, &clipped); - - // If ProjectPoint could not project to a valid value, then we assume that - // this point doesn't hit this rect. - if (clipped) - return false; - - return local_space_rect.Contains(hit_test_point_in_local_space); -} - -static bool PointHitsRegion(const gfx::PointF& screen_space_point, - const gfx::Transform& screen_space_transform, - const Region& layer_space_region, - float layer_content_scale_x, - float layer_content_scale_y) { - // If the transform is not invertible, then assume that this point doesn't hit - // this region. - gfx::Transform inverse_screen_space_transform( - gfx::Transform::kSkipInitialization); - if (!screen_space_transform.GetInverse(&inverse_screen_space_transform)) - return false; - - // Transform the hit test point from screen space to the local space of the - // given region. - bool clipped = false; - gfx::PointF hit_test_point_in_content_space = MathUtil::ProjectPoint( - inverse_screen_space_transform, screen_space_point, &clipped); - gfx::PointF hit_test_point_in_layer_space = - gfx::ScalePoint(hit_test_point_in_content_space, - 1.f / layer_content_scale_x, - 1.f / layer_content_scale_y); - - // If ProjectPoint could not project to a valid value, then we assume that - // this point doesn't hit this region. - if (clipped) - return false; - - return layer_space_region.Contains( - gfx::ToRoundedPoint(hit_test_point_in_layer_space)); -} - -static bool PointIsClippedBySurfaceOrClipRect( - const gfx::PointF& screen_space_point, - LayerImpl* layer) { - LayerImpl* current_layer = layer; - - // Walk up the layer tree and hit-test any render_surfaces and any layer - // clip rects that are active. - while (current_layer) { - if (current_layer->render_surface() && - !PointHitsRect( - screen_space_point, - current_layer->render_surface()->screen_space_transform(), - current_layer->render_surface()->content_rect())) - return true; - - // Note that drawable content rects are actually in target surface space, so - // the transform we have to provide is the target surface's - // screen_space_transform. - LayerImpl* render_target = current_layer->render_target(); - if (LayerClipsSubtree(current_layer) && - !PointHitsRect( - screen_space_point, - render_target->render_surface()->screen_space_transform(), - current_layer->drawable_content_rect())) - return true; - - current_layer = current_layer->parent(); - } - - // If we have finished walking all ancestors without having already exited, - // then the point is not clipped by any ancestors. - return false; -} - -static bool PointHitsLayer(LayerImpl* layer, - const gfx::PointF& screen_space_point) { - gfx::RectF content_rect(layer->content_bounds()); - if (!PointHitsRect( - screen_space_point, layer->screen_space_transform(), content_rect)) - return false; - - // At this point, we think the point does hit the layer, but we need to walk - // up the parents to ensure that the layer was not clipped in such a way - // that the hit point actually should not hit the layer. - if (PointIsClippedBySurfaceOrClipRect(screen_space_point, layer)) - return false; - - // Skip the HUD layer. - if (layer == layer->layer_tree_impl()->hud_layer()) - return false; - - return true; -} - -LayerImpl* LayerTreeHostCommon::FindFirstScrollingLayerThatIsHitByPoint( - const gfx::PointF& screen_space_point, - const LayerImplList& render_surface_layer_list) { - typedef LayerIterator<LayerImpl> LayerIteratorType; - LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list); - for (LayerIteratorType it = - LayerIteratorType::Begin(&render_surface_layer_list); - it != end; - ++it) { - // We don't want to consider render_surfaces for hit testing. - if (!it.represents_itself()) - continue; - - LayerImpl* current_layer = (*it); - if (!PointHitsLayer(current_layer, screen_space_point)) - continue; - - if (current_layer->scrollable()) - return current_layer; - } - - return NULL; -} - -LayerImpl* LayerTreeHostCommon::FindLayerThatIsHitByPoint( - const gfx::PointF& screen_space_point, - const LayerImplList& render_surface_layer_list) { - LayerImpl* found_layer = NULL; - - typedef LayerIterator<LayerImpl> LayerIteratorType; - LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list); - for (LayerIteratorType - it = LayerIteratorType::Begin(&render_surface_layer_list); - it != end; - ++it) { - // We don't want to consider render_surfaces for hit testing. - if (!it.represents_itself()) - continue; - - LayerImpl* current_layer = (*it); - if (!PointHitsLayer(current_layer, screen_space_point)) - continue; - - found_layer = current_layer; - break; - } - - // This can potentially return NULL, which means the screen_space_point did - // not successfully hit test any layers, not even the root layer. - return found_layer; -} - -LayerImpl* LayerTreeHostCommon::FindLayerThatIsHitByPointInTouchHandlerRegion( - const gfx::PointF& screen_space_point, - const LayerImplList& render_surface_layer_list) { - typedef LayerIterator<LayerImpl> LayerIteratorType; - LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list); - for (LayerIteratorType it = - LayerIteratorType::Begin(&render_surface_layer_list); - it != end; - ++it) { - // We don't want to consider render_surfaces for hit testing. - if (!it.represents_itself()) - continue; - - LayerImpl* current_layer = (*it); - if (!PointHitsLayer(current_layer, screen_space_point)) - continue; - - if (LayerTreeHostCommon::LayerHasTouchEventHandlersAt(screen_space_point, - current_layer)) - return current_layer; - - // Note that we could stop searching if we hit a layer we know to be - // opaque to hit-testing, but knowing that reliably is tricky (eg. due to - // CSS pointer-events: none). Also blink has an optimization for the - // common case of an entire document having handlers where it doesn't - // report any rects for child layers (since it knows they can't exceed - // the document bounds). - } - return NULL; -} - -bool LayerTreeHostCommon::LayerHasTouchEventHandlersAt( - const gfx::PointF& screen_space_point, - LayerImpl* layer_impl) { - if (layer_impl->touch_event_handler_region().IsEmpty()) - return false; - - if (!PointHitsRegion(screen_space_point, - layer_impl->screen_space_transform(), - layer_impl->touch_event_handler_region(), - layer_impl->contents_scale_x(), - layer_impl->contents_scale_y())) - return false; - - // At this point, we think the point does hit the touch event handler region - // on the layer, but we need to walk up the parents to ensure that the layer - // was not clipped in such a way that the hit point actually should not hit - // the layer. - if (PointIsClippedBySurfaceOrClipRect(screen_space_point, layer_impl)) - return false; - - return true; -} } // namespace cc |