[cc-frame-viewer] Show layers and levels of detail

tools/cc-frame-viewer/src/model/layer_tree_impl.js

 /* Copyright (c) 2012 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.
  */
 'use strict';
 
 base.require('base.bbox2');
 base.require('model.constants');
+base.require('model.layer_impl');
 
 base.exportTo('ccfv.model', function() {
 
   /**
    * Represents a cc::LayerTreeImpl
    *
    * @constructor
    */
-  function LayerTreeImpl(which_tree) {
+  function LayerTreeImpl(lthi, which_tree) {
+    this.lthi = lthi;
     this.which_tree = which_tree;
-    this.tiles = [];
+    this.tiles_ = [];
+    this.allLayers = [];
     this.tileBBox_ = undefined;
   };
 
   LayerTreeImpl.prototype = {
-    resetTiles: function() {
-      this.tilse = [];
+    setTilesDirty: function() {
+      this.tiles_ = undefined;
       this.tileBBox_ = undefined;
     },
 
+    get tiles() {
+      if (!this.tiles_)
+        this.tiles_ = this.lthi.getTilesForTree(this.which_tree);
+      return this.tiles_;
+    },
+
+    getOrCreateLayerImpl: function(layerID) {
+      var layerHistory = this.lthi.history.getOrCreateLayerImplHistory(layerID);
+      var layer = layerHistory.getOrCreateLayerImplForLTHI(this);
+      this.allLayers.push(layer);
+      return layer;
+    },
+
     get tileBBox() {
       if (!this.tileBBox_) {
         var bbox = new base.BBox2();
         for (var i = 0; i < this.tiles.length; i++) {
           var tile = this.tiles[i];
           var priority = tile.priority[this.which_tree];
           if (!priority.current_screen_quad)
             continue;
           bbox.addQuad(priority.current_screen_quad);
         }
         this.tileBBox_ = bbox;
       }
       return this.tileBBox_;
     },
 
   };
 
   return {
     LayerTreeImpl: LayerTreeImpl
   }
 });