cc : Track transform animation changes on transform tree

cc/trees/property_tree.cc

 // Copyright 2014 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 <stddef.h>
 
 #include <set>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 146 matching lines @@
 
 TransformNodeData::TransformNodeData()
     : target_id(-1),
       content_target_id(-1),
       source_node_id(-1),
       sorting_context_id(0),
       needs_local_transform_update(true),
       node_and_ancestors_are_animated_or_invertible(true),
       is_invertible(true),
       ancestors_are_invertible(true),
-      is_animated(false),
+      has_potential_animation(false),
+      is_currently_animating(false),
       to_screen_is_potentially_animated(false),
       has_only_translation_animations(true),
       to_screen_has_scale_animation(false),
       flattens_inherited_transform(false),
       node_and_ancestors_are_flat(true),
       node_and_ancestors_have_only_integer_translation(true),
       scrolls(false),
       needs_sublayer_scale(false),
       affected_by_inner_viewport_bounds_delta_x(false),
       affected_by_inner_viewport_bounds_delta_y(false),
@@ skipping 19 matching lines @@
          to_screen == other.to_screen && from_screen == other.from_screen &&
          target_id == other.target_id &&
          content_target_id == other.content_target_id &&
          source_node_id == other.source_node_id &&
          sorting_context_id == other.sorting_context_id &&
          needs_local_transform_update == other.needs_local_transform_update &&
          node_and_ancestors_are_animated_or_invertible ==
              other.node_and_ancestors_are_animated_or_invertible &&
          is_invertible == other.is_invertible &&
          ancestors_are_invertible == other.ancestors_are_invertible &&
-         is_animated == other.is_animated &&
+         has_potential_animation == other.has_potential_animation &&
+         is_currently_animating == other.is_currently_animating &&
          to_screen_is_potentially_animated ==
              other.to_screen_is_potentially_animated &&
          has_only_translation_animations ==
              other.has_only_translation_animations &&
          to_screen_has_scale_animation == other.to_screen_has_scale_animation &&
          flattens_inherited_transform == other.flattens_inherited_transform &&
          node_and_ancestors_are_flat == other.node_and_ancestors_are_flat &&
          node_and_ancestors_have_only_integer_translation ==
              other.node_and_ancestors_have_only_integer_translation &&
          scrolls == other.scrolls &&
@@ skipping 65 matching lines @@
   data->set_sorting_context_id(sorting_context_id);
 
   data->set_needs_local_transform_update(needs_local_transform_update);
 
   data->set_node_and_ancestors_are_animated_or_invertible(
       node_and_ancestors_are_animated_or_invertible);
 
   data->set_is_invertible(is_invertible);
   data->set_ancestors_are_invertible(ancestors_are_invertible);
 
-  data->set_is_animated(is_animated);
+  data->set_has_potential_animation(has_potential_animation);
+  data->set_is_currently_animating(is_currently_animating);
   data->set_to_screen_is_potentially_animated(
       to_screen_is_potentially_animated);
   data->set_has_only_translation_animations(has_only_translation_animations);
   data->set_to_screen_has_scale_animation(to_screen_has_scale_animation);
 
   data->set_flattens_inherited_transform(flattens_inherited_transform);
   data->set_node_and_ancestors_are_flat(node_and_ancestors_are_flat);
 
   data->set_node_and_ancestors_have_only_integer_translation(
       node_and_ancestors_have_only_integer_translation);
@@ skipping 49 matching lines @@
   sorting_context_id = data.sorting_context_id();
 
   needs_local_transform_update = data.needs_local_transform_update();
 
   node_and_ancestors_are_animated_or_invertible =
       data.node_and_ancestors_are_animated_or_invertible();
 
   is_invertible = data.is_invertible();
   ancestors_are_invertible = data.ancestors_are_invertible();
 
-  is_animated = data.is_animated();
+  has_potential_animation = data.has_potential_animation();
+  is_currently_animating = data.is_currently_animating();
   to_screen_is_potentially_animated = data.to_screen_is_potentially_animated();
   has_only_translation_animations = data.has_only_translation_animations();
   to_screen_has_scale_animation = data.to_screen_has_scale_animation();
 
   flattens_inherited_transform = data.flattens_inherited_transform();
   node_and_ancestors_are_flat = data.node_and_ancestors_are_flat();
 
   node_and_ancestors_have_only_integer_translation =
       data.node_and_ancestors_have_only_integer_translation();
   scrolls = data.scrolls();
@@ skipping 644 matching lines @@
   if (parent_node) {
     ancestor_is_animating = parent_node->data.to_screen_is_potentially_animated;
     ancestor_is_animating_scale =
         parent_node->data.to_screen_has_scale_animation;
     ancestor_maximum_target_scale =
         parent_node->data.combined_maximum_animation_target_scale;
     ancestor_starting_animation_scale =
         parent_node->data.combined_starting_animation_scale;
   }
   node->data.to_screen_is_potentially_animated =
-      node->data.is_animated || ancestor_is_animating;
+      node->data.has_potential_animation || ancestor_is_animating;
   node->data.to_screen_has_scale_animation =
       !node->data.has_only_translation_animations ||
       ancestor_is_animating_scale;
 
   // Once we've failed to compute a maximum animated scale at an ancestor, we
   // continue to fail.
   bool failed_at_ancestor =
       ancestor_is_animating_scale && ancestor_maximum_target_scale == 0.f;
 
   // Computing maximum animated scale in the presence of non-scale/translation
@@ skipping 114 matching lines @@
   if (source_node && source_node->id != parent_node->id &&
       source_to_parent_updates_allowed_ && source_node->data.transform_changed)
     node->data.transform_changed = true;
 }
 
 void TransformTree::UpdateNodeAndAncestorsAreAnimatedOrInvertible(
     TransformNode* node,
     TransformNode* parent_node) {
   if (!parent_node) {
     node->data.node_and_ancestors_are_animated_or_invertible =
-        node->data.is_animated || node->data.is_invertible;
+        node->data.has_potential_animation || node->data.is_invertible;
     return;
   }
   if (!parent_node->data.node_and_ancestors_are_animated_or_invertible) {
     node->data.node_and_ancestors_are_animated_or_invertible = false;
     return;
   }
   bool is_invertible = node->data.is_invertible;
   // Even when the current node's transform and the parent's screen space
   // transform are invertible, the current node's screen space transform can
   // become uninvertible due to floating-point arithmetic.
   if (!node->data.ancestors_are_invertible &&
       parent_node->data.ancestors_are_invertible)
     is_invertible = false;
   node->data.node_and_ancestors_are_animated_or_invertible =
-      node->data.is_animated || is_invertible;
+      node->data.has_potential_animation || is_invertible;
 }
 
 void TransformTree::SetDeviceTransform(const gfx::Transform& transform,
                                        gfx::PointF root_position) {
   gfx::Transform root_post_local = transform;
   TransformNode* node = Node(1);
   root_post_local.Scale(node->data.post_local_scale_factor,
                         node->data.post_local_scale_factor);
   root_post_local.Translate(root_position.x(), root_position.y());
   if (node->data.post_local == root_post_local)
@@ skipping 909 matching lines @@
   value->EndDictionary();
 
   value->BeginDictionary("scroll_tree");
   scroll_tree.AsValueInto(value.get());
   value->EndDictionary();
 
   return value;
 }
 
 }  // namespace cc