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Issue 2769793002: Implement CSS: scroll-boundary-behavior (Closed)
Patch Set: Update WebScrollBoundaryBehavior. Created 3 years, 7 months ago
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1 // Copyright 2012 The Chromium Authors. All rights reserved. 1 // Copyright 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "cc/layers/layer_impl.h" 5 #include "cc/layers/layer_impl.h"
6 6
7 #include <stddef.h> 7 #include <stddef.h>
8 #include <stdint.h> 8 #include <stdint.h>
9 9
10 #include <algorithm> 10 #include <algorithm>
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75 effect_tree_index_(EffectTree::kInvalidNodeId), 75 effect_tree_index_(EffectTree::kInvalidNodeId),
76 clip_tree_index_(ClipTree::kInvalidNodeId), 76 clip_tree_index_(ClipTree::kInvalidNodeId),
77 scroll_tree_index_(ScrollTree::kInvalidNodeId), 77 scroll_tree_index_(ScrollTree::kInvalidNodeId),
78 current_draw_mode_(DRAW_MODE_NONE), 78 current_draw_mode_(DRAW_MODE_NONE),
79 mutable_properties_(MutableProperty::kNone), 79 mutable_properties_(MutableProperty::kNone),
80 debug_info_(nullptr), 80 debug_info_(nullptr),
81 has_will_change_transform_hint_(false), 81 has_will_change_transform_hint_(false),
82 needs_push_properties_(false), 82 needs_push_properties_(false),
83 scrollbars_hidden_(false), 83 scrollbars_hidden_(false),
84 needs_show_scrollbars_(false), 84 needs_show_scrollbars_(false),
85 raster_even_if_not_in_rsll_(false) { 85 raster_even_if_not_in_rsll_(false),
86 scroll_boundary_behavior_(
87 ScrollBoundaryBehavior::kScrollBoundaryBehaviorTypeAuto) {
86 DCHECK_GT(layer_id_, 0); 88 DCHECK_GT(layer_id_, 0);
87 89
88 DCHECK(layer_tree_impl_); 90 DCHECK(layer_tree_impl_);
89 layer_tree_impl_->RegisterLayer(this); 91 layer_tree_impl_->RegisterLayer(this);
90 layer_tree_impl_->AddToElementMap(this); 92 layer_tree_impl_->AddToElementMap(this);
91 93
92 SetNeedsPushProperties(); 94 SetNeedsPushProperties();
93 } 95 }
94 96
95 LayerImpl::~LayerImpl() { 97 LayerImpl::~LayerImpl() {
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347 layer->needs_show_scrollbars_ = needs_show_scrollbars_; 349 layer->needs_show_scrollbars_ = needs_show_scrollbars_;
348 350
349 if (layer_property_changed_) { 351 if (layer_property_changed_) {
350 layer->layer_tree_impl()->set_needs_update_draw_properties(); 352 layer->layer_tree_impl()->set_needs_update_draw_properties();
351 layer->layer_property_changed_ = true; 353 layer->layer_property_changed_ = true;
352 } 354 }
353 355
354 layer->SetBounds(bounds_); 356 layer->SetBounds(bounds_);
355 layer->SetScrollClipLayer(scroll_clip_layer_id_); 357 layer->SetScrollClipLayer(scroll_clip_layer_id_);
356 layer->SetMutableProperties(mutable_properties_); 358 layer->SetMutableProperties(mutable_properties_);
359 layer->SetScrollBoundaryBehavior(scroll_boundary_behavior_);
357 360
358 // If the main thread commits multiple times before the impl thread actually 361 // If the main thread commits multiple times before the impl thread actually
359 // draws, then damage tracking will become incorrect if we simply clobber the 362 // draws, then damage tracking will become incorrect if we simply clobber the
360 // update_rect here. The LayerImpl's update_rect needs to accumulate (i.e. 363 // update_rect here. The LayerImpl's update_rect needs to accumulate (i.e.
361 // union) any update changes that have occurred on the main thread. 364 // union) any update changes that have occurred on the main thread.
362 update_rect_.Union(layer->update_rect()); 365 update_rect_.Union(layer->update_rect());
363 layer->SetUpdateRect(update_rect_); 366 layer->SetUpdateRect(update_rect_);
364 367
365 if (owned_debug_info_) 368 if (owned_debug_info_)
366 layer->SetDebugInfo(std::move(owned_debug_info_)); 369 layer->SetDebugInfo(std::move(owned_debug_info_));
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764 767
765 gfx::Vector2dF LayerImpl::ClampScrollToMaxScrollOffset() { 768 gfx::Vector2dF LayerImpl::ClampScrollToMaxScrollOffset() {
766 gfx::ScrollOffset old_offset = CurrentScrollOffset(); 769 gfx::ScrollOffset old_offset = CurrentScrollOffset();
767 gfx::ScrollOffset clamped_offset = ClampScrollOffsetToLimits(old_offset); 770 gfx::ScrollOffset clamped_offset = ClampScrollOffsetToLimits(old_offset);
768 gfx::Vector2dF delta = clamped_offset.DeltaFrom(old_offset); 771 gfx::Vector2dF delta = clamped_offset.DeltaFrom(old_offset);
769 if (!delta.IsZero()) 772 if (!delta.IsZero())
770 ScrollBy(delta); 773 ScrollBy(delta);
771 return delta; 774 return delta;
772 } 775 }
773 776
777 void LayerImpl::SetScrollBoundaryBehavior(ScrollBoundaryBehavior behavior) {
778 if (scroll_boundary_behavior_ == behavior)
779 return;
780 scroll_boundary_behavior_ = behavior;
781 layer_tree_impl()->DidUpdateScrollState(id());
782 NoteLayerPropertyChanged();
783 }
784
774 void LayerImpl::SetNeedsPushProperties() { 785 void LayerImpl::SetNeedsPushProperties() {
775 if (layer_tree_impl_ && !needs_push_properties_) { 786 if (layer_tree_impl_ && !needs_push_properties_) {
776 needs_push_properties_ = true; 787 needs_push_properties_ = true;
777 layer_tree_impl()->AddLayerShouldPushProperties(this); 788 layer_tree_impl()->AddLayerShouldPushProperties(this);
778 } 789 }
779 } 790 }
780 791
781 void LayerImpl::GetAllPrioritizedTilesForTracing( 792 void LayerImpl::GetAllPrioritizedTilesForTracing(
782 std::vector<PrioritizedTile>* prioritized_tiles) const { 793 std::vector<PrioritizedTile>* prioritized_tiles) const {
783 } 794 }
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980 991
981 ScrollTree& LayerImpl::GetScrollTree() const { 992 ScrollTree& LayerImpl::GetScrollTree() const {
982 return GetPropertyTrees()->scroll_tree; 993 return GetPropertyTrees()->scroll_tree;
983 } 994 }
984 995
985 TransformTree& LayerImpl::GetTransformTree() const { 996 TransformTree& LayerImpl::GetTransformTree() const {
986 return GetPropertyTrees()->transform_tree; 997 return GetPropertyTrees()->transform_tree;
987 } 998 }
988 999
989 } // namespace cc 1000 } // namespace cc
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