tools/deep_memory_profiler/visualizer/static/menu-view.js

   1 // Copyright 2013 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 /**
   6  * This is a view class showing tree-menu.
   7  * @param {Object} profiler Must have addListener method.
   8  * @construct
   9  */
  10 var MenuView = function(profiler) {
  11   this.profiler_ = profiler;
  12   this.placeholder_ = '#category-menu';
  13
  14   // Update graph view and menu view when profiler model changed.
  15   profiler.addListener('changed', this.redraw_.bind(this));
  16   profiler.addListener('changed:selected', this.selectNode_.bind(this));
  17 };
  18
  19 /**
  20  * Highlight the node being selected.
  21  * @param {string|null} id Model id.
  22  * @param {Object} pos Clicked position. Not used
  23  * @private
  24  */
  25 MenuView.prototype.selectNode_ = function(id) {
  26   var $tree = this.$tree_;
  27
  28   if (id == null) {
  29     $tree.tree('selectNode', null);
  30     return;
  31   }
  32
  33   var node = $tree.tree('getNodeById', id);
  34   $tree.tree('selectNode', node);
  35 };
  36
  37 /**
  38  * Update menu view when model updated.
  39  * @param {Array.<Object>} models
  40  * @private
  41  */
  42 MenuView.prototype.redraw_ = function(models) {
  43   function convert(origin, target) {
  44     target.label = origin.name;
  45     target.id = origin.id;
  46
  47     if ('children' in origin) {
  48       target.children = [];
  49       origin.children.forEach(function(originChild) {
  50         var targetChild = {};
  51         target.children.push(targetChild);
  52         convert(originChild, targetChild);
  53       });
  54     }
  55   }
  56
  57   function merge(origin, target) {
  58     if (!('children' in origin))
  59       return;
  60     if (!('children' in target)) {
  61       target.children = origin.children;
  62       return;
  63     }
  64
  65     origin.children.forEach(function(child) {
  66       // Find child with the same label in target tree.
  67       var index = target.children.reduce(function(previous, current, index) {
  68         if (child.label === current.label)
  69         return index;
  70         return previous;
  71       }, -1);
  72       if (index === -1)
  73         target.children.push(child);
  74       else
  75         merge(child, target.children[index]);
  76     });
  77   }
  78
  79   var self = this;
  80
  81   // Merge trees in all snapshots.
  82   var union = null;
  83   models.forEach(function(model) {
  84     var data = {};
  85     convert(model, data);
  86     if (!union)
  87       union = data;
  88     else
  89       merge(data, union);
  90   });
  91
  92   // Draw breakdown menu.
  93   var data = [union];
  94   if (!this.$tree_) {
  95     this.$tree_ = $(this.placeholder_).tree({
  96       data: data,
  97       autoOpen: true,
  98       onCreateLi: function(node, $li) {
  99         // TODO(junjianx): Add checkbox to decide the breakdown visibility.
 100       }
 101     });
 102
 103     // Delegate events
 104     this.$tree_.bind('tree.click', function(event) {
 105       event.preventDefault();
 106       self.profiler_.setSelected(event.node.id);
 107     });
 108     this.$tree_.bind('tree.close', function(event) {
 109       event.preventDefault();
 110       self.profiler_.unsetSub(event.node.id);
 111       self.profiler_.setSelected(event.node.id);
 112     });
 113   } else {
 114     this.$tree_.tree('loadData', data);
 115   }
 116 };