ui/compositor/layer_tree_owner.cc

   1 // Copyright 2014 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 "ui/compositor/layer_tree_owner.h"
   6
   7 #include "ui/compositor/layer.h"
   8
   9 namespace ui {
  10
  11 namespace {
  12
  13 // Deletes |layer| and all its descendants.
  14 void DeepDeleteLayers(Layer* layer) {
  15   std::vector<Layer*> children = layer->children();
  16   for (std::vector<Layer*>::const_iterator it = children.begin();
  17        it != children.end();
  18        ++it) {
  19     Layer* child = *it;
  20     DeepDeleteLayers(child);
  21   }
  22   delete layer;
  23 }
  24
  25 }  // namespace
  26
  27 LayerTreeOwner::LayerTreeOwner(Layer* root) : root_(root) {}
  28
  29 LayerTreeOwner::~LayerTreeOwner() {
  30   if (root_)
  31     DeepDeleteLayers(root_);
  32 }
  33
  34 }  // namespace ui