Clarify property tree id-to-index map names.

cc/layers/layer.cc

 // Copyright 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/layer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 454 matching lines @@
 
   if (inputs_.opacity == opacity)
     return;
   // We need to force a property tree rebuild when opacity changes from 1 to a
   // non-1 value or vice-versa as render surfaces can change.
   bool force_rebuild = opacity == 1.f || inputs_.opacity == 1.f;
   inputs_.opacity = opacity;
   SetSubtreePropertyChanged();
   if (layer_tree_host_ && !force_rebuild) {
     PropertyTrees* property_trees = layer_tree_->property_trees();
-    auto effect_id_to_index = property_trees->effect_id_to_index_map.find(id());
-    if (effect_id_to_index != property_trees->effect_id_to_index_map.end()) {
+    auto effect_id_to_index =
+        property_trees->layer_id_to_effect_node_index.find(id());
+    if (effect_id_to_index !=
+        property_trees->layer_id_to_effect_node_index.end()) {
       EffectNode* node =
           property_trees->effect_tree.Node(effect_id_to_index->second);
       node->opacity = opacity;
       node->effect_changed = true;
       property_trees->effect_tree.set_needs_update(true);
       SetNeedsCommitNoRebuild();
       return;
     }
   }
   SetNeedsCommit();
@@ skipping 85 matching lines @@
   inputs_.position = position;
 
   if (!layer_tree_host_)
     return;
 
   SetSubtreePropertyChanged();
   PropertyTrees* property_trees = layer_tree_->property_trees();
   if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::TRANSFORM,
                                        id())) {
     DCHECK_EQ(transform_tree_index(),
-              property_trees->transform_id_to_index_map[id()]);
+              property_trees->layer_id_to_transform_node_index[id()]);
     TransformNode* transform_node =
         property_trees->transform_tree.Node(transform_tree_index());
     transform_node->update_post_local_transform(position, transform_origin());
     if (transform_node->sticky_position_constraint_id >= 0) {
       StickyPositionNodeData* sticky_data =
           property_trees->transform_tree.StickyPositionData(
               transform_tree_index());
       sticky_data->main_thread_offset =
           position.OffsetFromOrigin() -
           sticky_data->constraints.parent_relative_sticky_box_offset
@@ skipping 40 matching lines @@
   SetSubtreePropertyChanged();
   if (layer_tree_host_) {
     PropertyTrees* property_trees = layer_tree_->property_trees();
     if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::TRANSFORM,
                                          id())) {
       // We need to trigger a rebuild if we could have affected 2d axis
       // alignment. We'll check to see if transform and inputs_.transform
       // are axis
       // align with respect to one another.
       DCHECK_EQ(transform_tree_index(),
-                property_trees->transform_id_to_index_map[id()]);
+                property_trees->layer_id_to_transform_node_index[id()]);
       TransformNode* transform_node =
           property_trees->transform_tree.Node(transform_tree_index());
       bool preserves_2d_axis_alignment =
           Are2dAxisAligned(inputs_.transform, transform);
       transform_node->local = transform;
       transform_node->needs_local_transform_update = true;
       transform_node->transform_changed = true;
       layer_tree_->property_trees()->transform_tree.set_needs_update(true);
       if (preserves_2d_axis_alignment)
         SetNeedsCommitNoRebuild();
@@ skipping 16 matching lines @@
   inputs_.transform_origin = transform_origin;
 
   if (!layer_tree_host_)
     return;
 
   SetSubtreePropertyChanged();
   PropertyTrees* property_trees = layer_tree_->property_trees();
   if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::TRANSFORM,
                                        id())) {
     DCHECK_EQ(transform_tree_index(),
-              property_trees->transform_id_to_index_map[id()]);
+              property_trees->layer_id_to_transform_node_index[id()]);
     TransformNode* transform_node =
         property_trees->transform_tree.Node(transform_tree_index());
     transform_node->update_pre_local_transform(transform_origin);
     transform_node->update_post_local_transform(position(), transform_origin);
     transform_node->needs_local_transform_update = true;
     transform_node->transform_changed = true;
     layer_tree_->property_trees()->transform_tree.set_needs_update(true);
     SetNeedsCommitNoRebuild();
     return;
   }
@@ skipping 82 matching lines @@
   if (!layer_tree_host_)
     return;
 
   PropertyTrees* property_trees = layer_tree_->property_trees();
   if (scroll_tree_index() != ScrollTree::kInvalidNodeId && scrollable())
     property_trees->scroll_tree.SetScrollOffset(id(), scroll_offset);
 
   if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::TRANSFORM,
                                        id())) {
     DCHECK_EQ(transform_tree_index(),
-              property_trees->transform_id_to_index_map[id()]);
+              property_trees->layer_id_to_transform_node_index[id()]);
     TransformNode* transform_node =
         property_trees->transform_tree.Node(transform_tree_index());
     transform_node->scroll_offset = CurrentScrollOffset();
     transform_node->needs_local_transform_update = true;
     property_trees->transform_tree.set_needs_update(true);
     SetNeedsCommitNoRebuild();
     return;
   }
 
   SetNeedsCommit();
@@ skipping 12 matching lines @@
 
   bool needs_rebuild = true;
 
   PropertyTrees* property_trees = layer_tree_->property_trees();
   if (scroll_tree_index() != ScrollTree::kInvalidNodeId && scrollable())
     property_trees->scroll_tree.SetScrollOffset(id(), scroll_offset);
 
   if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::TRANSFORM,
                                        id())) {
     DCHECK_EQ(transform_tree_index(),
-              property_trees->transform_id_to_index_map[id()]);
+              property_trees->layer_id_to_transform_node_index[id()]);
     TransformNode* transform_node =
         property_trees->transform_tree.Node(transform_tree_index());
     transform_node->scroll_offset = CurrentScrollOffset();
     transform_node->needs_local_transform_update = true;
     property_trees->transform_tree.set_needs_update(true);
     needs_rebuild = false;
   }
 
   if (needs_rebuild)
     property_trees->needs_rebuild = true;
@@ skipping 588 matching lines @@
     return;
   inputs_.opacity = opacity;
   // Changing the opacity may make a previously hidden layer visible, so a new
   // recording may be needed.
   SetNeedsUpdate();
   if (layer_tree_host_) {
     PropertyTrees* property_trees = layer_tree_->property_trees();
     if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::EFFECT,
                                          id())) {
       DCHECK_EQ(effect_tree_index(),
-                property_trees->effect_id_to_index_map[id()]);
+                property_trees->layer_id_to_effect_node_index[id()]);
       EffectNode* node = property_trees->effect_tree.Node(effect_tree_index());
       node->opacity = opacity;
       property_trees->effect_tree.set_needs_update(true);
     }
   }
 }
 
 void Layer::OnTransformAnimated(const gfx::Transform& transform) {
   if (inputs_.transform == transform)
     return;
   inputs_.transform = transform;
   // Changing the transform may change the visible part of this layer, so a new
   // recording may be needed.
   SetNeedsUpdate();
   if (layer_tree_host_) {
     PropertyTrees* property_trees = layer_tree_->property_trees();
     if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::TRANSFORM,
                                          id())) {
       DCHECK_EQ(transform_tree_index(),
-                property_trees->transform_id_to_index_map[id()]);
+                property_trees->layer_id_to_transform_node_index[id()]);
       TransformNode* node =
           property_trees->transform_tree.Node(transform_tree_index());
       node->local = transform;
       node->needs_local_transform_update = true;
       node->has_potential_animation = true;
       property_trees->transform_tree.set_needs_update(true);
     }
   }
 }
 
 void Layer::OnScrollOffsetAnimated(const gfx::ScrollOffset& scroll_offset) {
   // Do nothing. Scroll deltas will be sent from the compositor thread back
   // to the main thread in the same manner as during non-animated
   // compositor-driven scrolling.
 }
 
 void Layer::OnIsAnimatingChanged(const PropertyAnimationState& mask,
                                  const PropertyAnimationState& state) {
   DCHECK(layer_tree_host_);
   PropertyTrees* property_trees = layer_tree_->property_trees();
 
   TransformNode* transform_node = nullptr;
   if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::TRANSFORM,
                                        id())) {
     DCHECK_EQ(transform_tree_index(),
-              property_trees->transform_id_to_index_map[id()]);
+              property_trees->layer_id_to_transform_node_index[id()]);
     transform_node =
         property_trees->transform_tree.Node(transform_tree_index());
   }
 
   EffectNode* effect_node = nullptr;
   if (property_trees->IsInIdToIndexMap(PropertyTrees::TreeType::EFFECT, id())) {
     DCHECK_EQ(effect_tree_index(),
-              property_trees->effect_id_to_index_map[id()]);
+              property_trees->layer_id_to_effect_node_index[id()]);
     effect_node = property_trees->effect_tree.Node(effect_tree_index());
   }
 
   for (int property = TargetProperty::FIRST_TARGET_PROPERTY;
        property <= TargetProperty::LAST_TARGET_PROPERTY; ++property) {
     switch (property) {
       case TargetProperty::TRANSFORM:
         if (transform_node) {
           if (mask.currently_running[property])
             transform_node->is_currently_animating =
@@ skipping 173 matching lines @@
 
 LayerTree* Layer::GetLayerTree() const {
   return layer_tree_;
 }
 
 void Layer::SetLayerIdForTesting(int id) {
   inputs_.layer_id = id;
 }
 
 }  // namespace cc