


WebInspector = {};
WebInspector.UIString = function(s) { return s; };



function binarySearch(object, array, comparator)
{
var first = 0;
var last = array.length - 1;

while (first <= last) {
var mid = (first + last) >> 1;
var c = comparator(object, array[mid]);
if (c > 0)
first = mid + 1;
else if (c < 0)
last = mid - 1;
else
return mid;
}


return -(first + 1);
}

Object.defineProperty(Array.prototype, "binaryIndexOf", { value: function(value, comparator)
{
var result = binarySearch(value, this, comparator);
return result >= 0 ? result : -1;
}});

function insertionIndexForObjectInListSortedByFunction(anObject, aList, aFunction)
{
var index = binarySearch(anObject, aList, aFunction);
if (index < 0)

return -index - 1;
else {

while (index > 0 && aFunction(anObject, aList[index - 1]) === 0)
index--;
return index;        
}
}
;


WebInspector.HeapSnapshotLoader = function()
{
this._json = "";
this._state = "find-snapshot-info";
this._snapshot = {};
}

WebInspector.HeapSnapshotLoader.prototype = {
_findBalancedCurlyBrackets: function()
{
var counter = 0;
var openingBracket = "{".charCodeAt(0), closingBracket = "}".charCodeAt(0);
for (var i = 0, l = this._json.length; i < l; ++i) {
var character = this._json.charCodeAt(i);
if (character === openingBracket)
++counter;
else if (character === closingBracket) {
if (--counter === 0)
return i + 1;
}
}
return -1;
},

finishLoading: function()
{
if (!this._json)
return null;
this._parseStringsArray();
this._json = "";
var result = new WebInspector.HeapSnapshot(this._snapshot);
this._json = "";
this._snapshot = {};
return result;
},

_parseNodes: function()
{
var index = 0;
var char0 = "0".charCodeAt(0), char9 = "9".charCodeAt(0), closingBracket = "]".charCodeAt(0);
var length = this._json.length;
while (true) {
while (index < length) {
var code = this._json.charCodeAt(index);
if (char0 <= code && code <= char9)
break;
else if (code === closingBracket) {
this._json = this._json.slice(index + 1);

this._snapshot.nodes = this._snapshot.nodes.slice(0);
return false;
}
++index;
}
if (index === length) {
this._json = "";
return true;
}
var startIndex = index;
while (index < length) {
var code = this._json.charCodeAt(index);
if (char0 > code || code > char9)
break;
++index;
}
if (index === length) {
this._json = this._json.slice(startIndex);
return true;
}
this._snapshot.nodes.push(parseInt(this._json.slice(startIndex, index)));
}
},

_parseStringsArray: function()
{
var closingBracketIndex = this._json.lastIndexOf("]");
if (closingBracketIndex === -1)
throw new Error("Incomplete JSON");
this._json = this._json.slice(0, closingBracketIndex + 1);
this._snapshot.strings = JSON.parse(this._json);
},

pushJSONChunk: function(chunk)
{
this._json += chunk;
switch (this._state) {
case "find-snapshot-info": {
var snapshotToken = "\"snapshot\"";
var snapshotTokenIndex = this._json.indexOf(snapshotToken);
if (snapshotTokenIndex === -1)
throw new Error("Snapshot token not found");
this._json = this._json.slice(snapshotTokenIndex + snapshotToken.length + 1);
this._state = "parse-snapshot-info";
this.pushJSONChunk("");
break;
}
case "parse-snapshot-info": {
var closingBracketIndex = this._findBalancedCurlyBrackets();
if (closingBracketIndex === -1)
return;
this._snapshot.snapshot = JSON.parse(this._json.slice(0, closingBracketIndex));
this._json = this._json.slice(closingBracketIndex);
this._state = "find-nodes";
this.pushJSONChunk("");
break;
}
case "find-nodes": {
var nodesToken = "\"nodes\"";
var nodesTokenIndex = this._json.indexOf(nodesToken);
if (nodesTokenIndex === -1)
return;
var bracketIndex = this._json.indexOf("[", nodesTokenIndex);
if (bracketIndex === -1)
return;
this._json = this._json.slice(bracketIndex + 1);
this._state = "parse-nodes-meta-info";
this.pushJSONChunk("");
break;
}
case "parse-nodes-meta-info": {
var closingBracketIndex = this._findBalancedCurlyBrackets();
if (closingBracketIndex === -1)
return;
this._snapshot.nodes = [JSON.parse(this._json.slice(0, closingBracketIndex))];
this._json = this._json.slice(closingBracketIndex);
this._state = "parse-nodes";
this.pushJSONChunk("");
break;          
}
case "parse-nodes": {
if (this._parseNodes())
return;
this._state = "find-strings";
this.pushJSONChunk("");
break;
}
case "find-strings": {
var stringsToken = "\"strings\"";
var stringsTokenIndex = this._json.indexOf(stringsToken);
if (stringsTokenIndex === -1)
return;
var bracketIndex = this._json.indexOf("[", stringsTokenIndex);
if (bracketIndex === -1)
return;
this._json = this._json.slice(bracketIndex);
this._state = "accumulate-strings";
break;
}
case "accumulate-strings":
break;
}
}
};

WebInspector.HeapSnapshotArraySlice = function(snapshot, arrayName, start, end)
{


this._snapshot = snapshot;
this._arrayName = arrayName;
this._start = start;
this.length = end - start;
}

WebInspector.HeapSnapshotArraySlice.prototype = {
item: function(index)
{
return this._snapshot[this._arrayName][this._start + index];
}
}

WebInspector.HeapSnapshotEdge = function(snapshot, edges, edgeIndex)
{
this._snapshot = snapshot;
this._edges = edges;
this.edgeIndex = edgeIndex || 0;
}

WebInspector.HeapSnapshotEdge.prototype = {
clone: function()
{
return new WebInspector.HeapSnapshotEdge(this._snapshot, this._edges, this.edgeIndex);
},

get hasStringName()
{
if (!this.isShortcut)
return this._hasStringName;
return isNaN(parseInt(this._name, 10));
},

get isElement()
{
return this._type() === this._snapshot._edgeElementType;
},

get isHidden()
{
return this._type() === this._snapshot._edgeHiddenType;
},

get isInternal()
{
return this._type() === this._snapshot._edgeInternalType;
},

get isInvisible()
{
return this._type() === this._snapshot._edgeInvisibleType;
},

get isShortcut()
{
return this._type() === this._snapshot._edgeShortcutType;
},

get name()
{
if (!this.isShortcut)
return this._name;
var numName = parseInt(this._name, 10);
return isNaN(numName) ? this._name : numName;
},

get node()
{
return new WebInspector.HeapSnapshotNode(this._snapshot, this.nodeIndex);
},

get nodeIndex()
{
return this._edges.item(this.edgeIndex + this._snapshot._edgeToNodeOffset);
},

get rawEdges()
{
return this._edges;
},

toString: function()
{
switch (this.type) {
case "context": return "->" + this.name;
case "element": return "[" + this.name + "]";
case "property":
return this.name.indexOf(" ") === -1 ? "." + this.name : "[\"" + this.name + "\"]";
case "shortcut":
var name = this.name;
if (typeof name === "string")
return this.name.indexOf(" ") === -1 ? "." + this.name : "[\"" + this.name + "\"]";
else
return "[" + this.name + "]";
case "internal":
case "hidden":
case "invisible":
return "{" + this.name + "}";
};
return "?" + this.name + "?";
},

get type()
{
return this._snapshot._edgeTypes[this._type()];
},

get _hasStringName()
{
return !this.isElement && !this.isHidden;
},

get _name()
{
return this._hasStringName ? this._snapshot._strings[this._nameOrIndex] : this._nameOrIndex;
},

get _nameOrIndex()
{
return this._edges.item(this.edgeIndex + this._snapshot._edgeNameOffset);
},

_type: function()
{
return this._edges.item(this.edgeIndex + this._snapshot._edgeTypeOffset);
}
};

WebInspector.HeapSnapshotEdgeIterator = function(edge)
{
this.edge = edge;
}

WebInspector.HeapSnapshotEdgeIterator.prototype = {
first: function()
{
this.edge.edgeIndex = 0;
},

hasNext: function()
{
return this.edge.edgeIndex < this.edge._edges.length;
},

get index()
{
return this.edge.edgeIndex;
},

set index(newIndex)
{
this.edge.edgeIndex = newIndex;
},

get item()
{
return this.edge;
},

next: function()
{
this.edge.edgeIndex += this.edge._snapshot._edgeFieldsCount;
}
};

WebInspector.HeapSnapshotRetainerEdge = function(snapshot, retainers, retainerIndex)
{
this._snapshot = snapshot;
this._retainers = retainers;
this.retainerIndex = retainerIndex || 0;
}

WebInspector.HeapSnapshotRetainerEdge.prototype = {
clone: function()
{
return new WebInspector.HeapSnapshotRetainerEdge(this._snapshot, this._retainers, this.retainerIndex);
},

get hasStringName()
{
return this._edge.hasStringName;
},

get isElement()
{
return this._edge.isElement;
},

get isHidden()
{
return this._edge.isHidden;
},

get isInternal()
{
return this._edge.isInternal;
},

get isInvisible()
{
return this._edge.isInvisible;
},

get isShortcut()
{
return this._edge.isShortcut;
},

get name()
{
return this._edge.name;
},

get node()
{
return this._node;
},

get nodeIndex()
{
return this._nodeIndex;
},

get retainerIndex()
{
return this._retainerIndex;
},

set retainerIndex(newIndex)
{
if (newIndex !== this._retainerIndex) {
this._retainerIndex = newIndex;
this._setupEdge();
}
},

_setupEdge: function()
{
var globalEdgeIndex = this._retainers.item(this._retainerIndex);
this._nodeIndex = this._snapshot._findNearestNodeIndex(globalEdgeIndex);
this._node = new WebInspector.HeapSnapshotNode(this._snapshot, this._nodeIndex);
var edgeIndex = globalEdgeIndex - this._nodeIndex - this._snapshot._firstEdgeOffset;
this._edge = new WebInspector.HeapSnapshotEdge(this._snapshot, this._node.rawEdges, edgeIndex);
},

toString: function()
{
return this._edge.toString();
},

get type()
{
return this._edge.type;
}
}

WebInspector.HeapSnapshotRetainerEdgeIterator = function(retainer)
{
this.retainer = retainer;
}

WebInspector.HeapSnapshotRetainerEdgeIterator.prototype = {
first: function()
{
this.retainer.retainerIndex = 0;
},

hasNext: function()
{
return this.retainer.retainerIndex < this.retainer._retainers.length;
},

get index()
{
return this.retainer.retainerIndex;
},

set index(newIndex)
{
this.retainer.retainerIndex = newIndex;
},

get item()
{
return this.retainer;
},

next: function()
{
++this.retainer.retainerIndex;
}
};

WebInspector.HeapSnapshotNode = function(snapshot, nodeIndex)
{
this._snapshot = snapshot;
this._firstNodeIndex = nodeIndex;
this.nodeIndex = nodeIndex;
}

WebInspector.HeapSnapshotNode.prototype = {
get className()
{
switch (this.type) {
case "hidden":
return WebInspector.UIString("(system)");
case "object": {
var commentPos = this.name.indexOf("/");
return commentPos !== -1 ? this.name.substring(0, commentPos).trimRight() : this.name;
}
case "native": {
var entitiesCountPos = this.name.indexOf("/");
return entitiesCountPos !== -1 ? this.name.substring(0, entitiesCountPos).trimRight() : this.name;
}
case "code":
return WebInspector.UIString("(compiled code)");
default:
return "(" + this.type + ")";
}
},

get dominatorIndex()
{
return this._nodes[this.nodeIndex + this._snapshot._dominatorOffset];
},

get edges()
{
return new WebInspector.HeapSnapshotEdgeIterator(new WebInspector.HeapSnapshotEdge(this._snapshot, this.rawEdges));
},

get edgesCount()
{
return this._nodes[this.nodeIndex + this._snapshot._edgesCountOffset];
},

get id()
{
return this._nodes[this.nodeIndex + this._snapshot._nodeIdOffset];
},

get instancesCount()
{
return this._nodes[this.nodeIndex + this._snapshot._nodeInstancesCountOffset];
},

get isHidden()
{
return this._type() === this._snapshot._nodeHiddenType;
},

get isRoot()
{
return this.nodeIndex === this._snapshot._rootNodeIndex;
},

get name()
{
return this._snapshot._strings[this._name()];
},

get rawEdges()
{
var firstEdgeIndex = this._firstEdgeIndex();
return new WebInspector.HeapSnapshotArraySlice(this._snapshot, "_nodes", firstEdgeIndex, firstEdgeIndex + this.edgesCount * this._snapshot._edgeFieldsCount);
},

get retainedSize()
{
return this._nodes[this.nodeIndex + this._snapshot._nodeRetainedSizeOffset];
},

get retainers()
{
return new WebInspector.HeapSnapshotRetainerEdgeIterator(new WebInspector.HeapSnapshotRetainerEdge(this._snapshot, this._snapshot._retainersForNode(this)));
},

get selfSize()
{
return this._nodes[this.nodeIndex + this._snapshot._nodeSelfSizeOffset];
},

get type()
{
return this._snapshot._nodeTypes[this._type()];
},

_name: function()
{
return this._nodes[this.nodeIndex + this._snapshot._nodeNameOffset];
},

get _nodes()
{
return this._snapshot._nodes;
},

_firstEdgeIndex: function()
{
return this.nodeIndex + this._snapshot._firstEdgeOffset;
},

get _nextNodeIndex()
{
return this._firstEdgeIndex() + this.edgesCount * this._snapshot._edgeFieldsCount;
},

_type: function()
{
return this._nodes[this.nodeIndex + this._snapshot._nodeTypeOffset];
}
};

WebInspector.HeapSnapshotNodeIterator = function(node)
{
this.node = node;
}

WebInspector.HeapSnapshotNodeIterator.prototype = {
first: function()
{
this.node.nodeIndex = this.node._firstNodeIndex;
},

hasNext: function()
{
return this.node.nodeIndex < this.node._nodes.length;
},

get index()
{
return this.node.nodeIndex;
},

set index(newIndex)
{
this.node.nodeIndex = newIndex;
},

get item()
{
return this.node;
},

next: function()
{
this.node.nodeIndex = this.node._nextNodeIndex;
}
}

WebInspector.HeapSnapshot = function(profile)
{
this.uid = profile.snapshot.uid;
this._nodes = profile.nodes;
this._strings = profile.strings;

this._init();
}

WebInspector.HeapSnapshot.prototype = {
_init: function()
{
this._metaNodeIndex = 0;
this._rootNodeIndex = 1;
var meta = this._nodes[this._metaNodeIndex];
this._nodeTypeOffset = meta.fields.indexOf("type");
this._nodeNameOffset = meta.fields.indexOf("name");
this._nodeIdOffset = meta.fields.indexOf("id");
this._nodeInstancesCountOffset = this._nodeIdOffset;
this._nodeSelfSizeOffset = meta.fields.indexOf("self_size");
this._nodeRetainedSizeOffset = meta.fields.indexOf("retained_size");
this._dominatorOffset = meta.fields.indexOf("dominator");
this._edgesCountOffset = meta.fields.indexOf("children_count");
this._firstEdgeOffset = meta.fields.indexOf("children");
this._nodeTypes = meta.types[this._nodeTypeOffset];
this._nodeHiddenType = this._nodeTypes.indexOf("hidden");
var edgesMeta = meta.types[this._firstEdgeOffset];
this._edgeFieldsCount = edgesMeta.fields.length;
this._edgeTypeOffset = edgesMeta.fields.indexOf("type");
this._edgeNameOffset = edgesMeta.fields.indexOf("name_or_index");
this._edgeToNodeOffset = edgesMeta.fields.indexOf("to_node");
this._edgeTypes = edgesMeta.types[this._edgeTypeOffset];
this._edgeElementType = this._edgeTypes.indexOf("element");
this._edgeHiddenType = this._edgeTypes.indexOf("hidden");
this._edgeInternalType = this._edgeTypes.indexOf("internal");
this._edgeShortcutType = this._edgeTypes.indexOf("shortcut");
this._edgeInvisibleType = this._edgeTypes.length;
this._edgeTypes.push("invisible");

this._markInvisibleEdges();
},

dispose: function()
{
delete this._nodes;
delete this._strings;
delete this._retainers;
delete this._retainerIndex;
delete this._nodeIndex;
if (this._aggregates) {
delete this._aggregates;
this._aggregatesIndexesSorted = false;
}
delete this._baseNodeIds;
},

get _allNodes()
{
return new WebInspector.HeapSnapshotNodeIterator(this.rootNode);
},

get nodeCount()
{
if (this._nodeCount)
return this._nodeCount;

this._nodeCount = 0;
for (var iter = this._allNodes; iter.hasNext(); iter.next())
++this._nodeCount;
return this._nodeCount;
},

nodeFieldValuesByIndex: function(fieldName, indexes)
{
var node = new WebInspector.HeapSnapshotNode(this);
var result = new Array(indexes.length);
for (var i = 0, l = indexes.length; i < l; ++i) {
node.nodeIndex = indexes[i];
result[i] = node[fieldName];
}
return result;
},

get rootNode()
{
return new WebInspector.HeapSnapshotNode(this, this._rootNodeIndex);
},

get rootNodeIndex()
{
return this._rootNodeIndex;
},

get totalSize()
{
return this.rootNode.retainedSize;
},

_retainersForNode: function(node)
{
if (!this._retainers)
this._buildRetainers();

var retIndexFrom = this._getRetainerIndex(node.nodeIndex);
var retIndexTo = this._getRetainerIndex(node._nextNodeIndex);
return new WebInspector.HeapSnapshotArraySlice(this, "_retainers", retIndexFrom, retIndexTo);
},

aggregates: function(sortedIndexes)
{
if (!this._aggregates)
this._buildAggregates();
if (sortedIndexes && !this._aggregatesIndexesSorted)
this._sortAggregateIndexes();
return this._aggregates;
},

_buildRetainers: function()
{
if (!this._nodeIndex)
this._buildNodeIndex();

this._retainerIndex = new Array(this._nodeIndex.length);
for (var i = 0, l = this._retainerIndex.length; i < l; ++i)
this._retainerIndex[i] = 0;
for (var nodesIter = this._allNodes; nodesIter.hasNext(); nodesIter.next()) {
var node = nodesIter.node;
for (var edgesIter = node.edges; edgesIter.hasNext(); edgesIter.next()) {
var edge = edgesIter.edge;
var nodeIndex = edge.nodeIndex;
var position = this._findNodePositionInIndex(nodeIndex);
++this._retainerIndex[position];
}
}
var retainerCount = 0;
for (i = 0, l = this._retainerIndex.length; i < l; ++i)
retainerCount += this._retainerIndex[i];
this._retainers = new Array(retainerCount + 1);
var retainerPosition = 0;
for (i = 0, l = this._retainerIndex.length; i < l; ++i) {
retainerCount = this._retainers[retainerPosition] = this._retainerIndex[i];
this._retainerIndex[i] = retainerPosition;
retainerPosition += retainerCount;
}
for (nodesIter = this._allNodes; nodesIter.hasNext(); nodesIter.next()) {
var node = nodesIter.node;
for (var edgesIter = node.edges; edgesIter.hasNext(); edgesIter.next()) {
var edge = edgesIter.edge;
var nodeIndex = edge.nodeIndex;
var retIndex = this._getRetainerIndex(nodeIndex);
var idx = retIndex + (--this._retainers[retIndex]);
this._retainers[idx] = node.nodeIndex + this._firstEdgeOffset + edge.edgeIndex;
}
}
},

_buildAggregates: function()
{
this._aggregates = {};
for (var iter = this._allNodes; iter.hasNext(); iter.next()) {
var node = iter.node;
var className = node.className;
var nameMatters = node.type === "object" || node.type === "native";
if (node.type !== "native" && node.selfSize === 0)
continue;
if (!(className in this._aggregates))
this._aggregates[className] = { count: 0, self: 0, maxRet: 0, type: node.type, name: nameMatters ? node.name : null, idxs: [] };
var clss = this._aggregates[className];
++clss.count;
clss.self += node.selfSize;
if (node.retainedSize > clss.maxRet)
clss.maxRet = node.retainedSize;
clss.idxs.push(node.nodeIndex);
}

for (var className in this._aggregates)
this._aggregates[className].idxs = this._aggregates[className].idxs.slice(0);
},

_sortAggregateIndexes: function()
{
var nodeA = new WebInspector.HeapSnapshotNode(this);
var nodeB = new WebInspector.HeapSnapshotNode(this);
for (var clss in this._aggregates)
this._aggregates[clss].idxs.sort(
function(idxA, idxB) {
nodeA.nodeIndex = idxA;
nodeB.nodeIndex = idxB;
return nodeA.id < nodeB.id ? -1 : 1;
});

this._aggregatesIndexesSorted = true;
},

_buildNodeIndex: function()
{
var count = 0;
for (var nodesIter = this._allNodes; nodesIter.hasNext(); nodesIter.next(), ++count);
this._nodeIndex = new Array(count + 1);
count = 0;
for (nodesIter = this._allNodes; nodesIter.hasNext(); nodesIter.next(), ++count)
this._nodeIndex[count] = nodesIter.index;
this._nodeIndex[count] = this._nodes.length;
},

_findNodePositionInIndex: function(index)
{
return binarySearch(index, this._nodeIndex, this._numbersComparator);
},

_findNearestNodeIndex: function(index)
{
var result = this._findNodePositionInIndex(index);
if (result < 0) {
result = -result - 1;
nodeIndex = this._nodeIndex[result];

if (nodeIndex > index)
nodeIndex = this._nodeIndex[result - 1];
} else
var nodeIndex = this._nodeIndex[result];
return nodeIndex;
},

_getRetainerIndex: function(nodeIndex)
{
var nodePosition = this._findNodePositionInIndex(nodeIndex);
return this._retainerIndex[nodePosition];
},

_markInvisibleEdges: function()
{



for (var iter = this.rootNode.edges; iter.hasNext(); iter.next()) {
var edge = iter.edge;
if (!edge.isShortcut)
continue;
var node = edge.node;
var propNames = {};
for (var innerIter = node.edges; innerIter.hasNext(); innerIter.next()) {
var globalObjEdge = innerIter.edge;
if (globalObjEdge.isShortcut)
propNames[globalObjEdge._nameOrIndex] = true;
}
for (innerIter.first(); innerIter.hasNext(); innerIter.next()) {
var globalObjEdge = innerIter.edge;
if (!globalObjEdge.isShortcut
&& globalObjEdge.node.isHidden
&& globalObjEdge._hasStringName
&& (globalObjEdge._nameOrIndex in propNames))
this._nodes[globalObjEdge._edges._start + globalObjEdge.edgeIndex + this._edgeTypeOffset] = this._edgeInvisibleType;
}
}
},

_numbersComparator: function(a, b)
{
return a < b ? -1 : (a > b ? 1 : 0);
},

baseSnapshotHasNode: function(baseSnapshotId, className, nodeId)
{
return this._baseNodeIds[baseSnapshotId][className].binaryIndexOf(nodeId, this._numbersComparator) !== -1;
},

pushBaseIds: function(baseSnapshotId, className, nodeIds)
{
if (!this._baseNodeIds)
this._baseNodeIds = [];
if (!this._baseNodeIds[baseSnapshotId])
this._baseNodeIds[baseSnapshotId] = {};
this._baseNodeIds[baseSnapshotId][className] = nodeIds;
},

createDiff: function(className)
{
return new WebInspector.HeapSnapshotsDiff(this, className);
},

_parseFilter: function(filter)
{
if (!filter)
return null;
var parsedFilter = eval("(function(){return " + filter + "})()");
return parsedFilter.bind(this);
},

createEdgesProvider: function(nodeIndex, filter)
{
return new WebInspector.HeapSnapshotEdgesProvider(this, nodeIndex, this._parseFilter(filter));
},

createNodesProvider: function(filter)
{
return new WebInspector.HeapSnapshotNodesProvider(this, this._parseFilter(filter));
},

createNodesProviderForClass: function(className)
{
return new WebInspector.HeapSnapshotNodesProvider(this, null, className);
},

createPathFinder: function(targetNodeIndex, skipHidden)
{
return new WebInspector.HeapSnapshotPathFinder(this, targetNodeIndex, skipHidden);
},

updateStaticData: function()
{
return {nodeCount: this.nodeCount, rootNodeIndex: this._rootNodeIndex, totalSize: this.totalSize, uid: this.uid};
}
};

WebInspector.HeapSnapshotFilteredOrderedIterator = function(iterator, filter, iterationOrder)
{
this._filter = filter;
this._iterator = iterator;
this._iterationOrder = iterationOrder ? iterationOrder.slice(0) : null;
this._position = 0;
this._lastComparator = null;
}

WebInspector.HeapSnapshotFilteredOrderedIterator.prototype = {
_createIterationOrder: function()
{
this._iterationOrder = [];
var iterator = this._iterator;
if (!this._filter) {
for (iterator.first(); iterator.hasNext(); iterator.next())
this._iterationOrder.push(iterator.index);
} else {
for (iterator.first(); iterator.hasNext(); iterator.next()) {
if (this._filter(iterator.item))
this._iterationOrder.push(iterator.index);
}
}
},

first: function()
{
this._position = 0;
},

hasNext: function()
{
return this._position < this._iterationOrder.length;
},

get isEmpty()
{
if (this._iterationOrder)
return !this._iterationOrder.length;
if (this._unfilteredIterationOrder && !this._filter)
return !this._unfilteredIterationOrder.length;
var iterator = this._iterator;
if (!this._unfilteredIterationOrder && !this._filter) {
iterator.first();
return !iterator.hasNext();
} else if (!this._unfilteredIterationOrder) {
for (iterator.first(); iterator.hasNext(); iterator.next())
if (this._filter(iterator.item))
return false;
} else {
var order = this._unfilteredIterationOrder.constructor === Array ?
this._unfilteredIterationOrder : this._unfilteredIterationOrder.slice(0);
for (var i = 0, l = order.length; i < l; ++i) {
iterator.index = order[i];
if (this._filter(iterator.item))
return false;
}
}
return true;
},

get item()
{
this._iterator.index = this._iterationOrder[this._position];
return this._iterator.item;
},

get length()
{
if (!this._iterationOrder)
this._createIterationOrder();
return this._iterationOrder.length;
},

next: function()
{
++this._position;
},

serializeNextItems: function(count)
{
var result = new Array(count);
for (var i = 0 ; i < count && this.hasNext(); ++i, this.next())
result[i] = this._serialize(this.item);
result.length = i;
result.hasNext = this.hasNext();
result.totalLength = this.length;
return result;
},

sortAndRewind: function(comparator)
{
var result = this.sort(comparator);
if (result)
this.first();
return result;
}
}

WebInspector.HeapSnapshotFilteredOrderedIterator.prototype.createComparator = function(fieldNames)
{
return {fieldName1:fieldNames[0], ascending1:fieldNames[1], fieldName2:fieldNames[2], ascending2:fieldNames[3]};
}

WebInspector.HeapSnapshotEdgesProvider = function(snapshot, nodeIndex, filter)
{
this.snapshot = snapshot;
var node = new WebInspector.HeapSnapshotNode(snapshot, nodeIndex);
WebInspector.HeapSnapshotFilteredOrderedIterator.call(this, new WebInspector.HeapSnapshotEdgeIterator(new WebInspector.HeapSnapshotEdge(snapshot, node.rawEdges)), filter);
}

WebInspector.HeapSnapshotEdgesProvider.prototype = {
_serialize: function(edge)
{
return {name: edge.name, node: WebInspector.HeapSnapshotNodesProvider.prototype._serialize(edge.node), nodeIndex: edge.nodeIndex, type: edge.type};
},

sort: function(comparator)
{
if (this._lastComparator === comparator)
return false;
this._lastComparator = comparator;
var fieldName1 = comparator.fieldName1;
var fieldName2 = comparator.fieldName2;
var ascending1 = comparator.ascending1;
var ascending2 = comparator.ascending2;

var edgeA = this._iterator.item.clone();
var edgeB = edgeA.clone();
var nodeA = new WebInspector.HeapSnapshotNode(this.snapshot);
var nodeB = new WebInspector.HeapSnapshotNode(this.snapshot);

function sortByEdgeFieldName(ascending, indexA, indexB)
{
edgeA.edgeIndex = indexA;
edgeB.edgeIndex = indexB;
if (edgeB.name === "__proto__") return -1;
if (edgeA.name === "__proto__") return 1;
var result =
edgeA.hasStringName === edgeB.hasStringName ?
(edgeA.name < edgeB.name ? -1 : (edgeA.name > edgeB.name ? 1 : 0)) :
(edgeA.hasStringName ? -1 : 1);
return ascending ? result : -result;
}

function sortByNodeField(fieldName, ascending, indexA, indexB)
{
edgeA.edgeIndex = indexA;
edgeB.edgeIndex = indexB;
nodeA.nodeIndex = edgeA.nodeIndex;
nodeB.nodeIndex = edgeB.nodeIndex;
var valueA = nodeA[fieldName];
var valueB = nodeB[fieldName];
var result = valueA < valueB ? -1 : (valueA > valueB ? 1 : 0);
return ascending ? result : -result;
}

if (!this._iterationOrder)
this._createIterationOrder();

function sortByEdgeAndNode(indexA, indexB) {
var result = sortByEdgeFieldName(ascending1, indexA, indexB);
if (result === 0)
result = sortByNodeField(fieldName2, ascending2, indexA, indexB);
return result;
}

function sortByNodeAndEdge(indexA, indexB) {
var result = sortByNodeField(fieldName1, ascending1, indexA, indexB);
if (result === 0)
result = sortByEdgeFieldName(ascending2, indexA, indexB);
return result;
}

function sortByNodeAndNode(indexA, indexB) {
var result = sortByNodeField(fieldName1, ascending1, indexA, indexB);
if (result === 0)
result = sortByNodeField(fieldName2, ascending2, indexA, indexB);
return result;
}

if (fieldName1 === "!edgeName")
this._iterationOrder.sort(sortByEdgeAndNode);
else if (fieldName2 === "!edgeName")
this._iterationOrder.sort(sortByNodeAndEdge);
else
this._iterationOrder.sort(sortByNodeAndNode);
return true;
}
};

WebInspector.HeapSnapshotEdgesProvider.prototype.__proto__ = WebInspector.HeapSnapshotFilteredOrderedIterator.prototype;

WebInspector.HeapSnapshotNodesProvider = function(snapshot, filter, className)
{
this.snapshot = snapshot;
if (!className)
WebInspector.HeapSnapshotFilteredOrderedIterator.call(this, snapshot._allNodes, filter);
else
WebInspector.HeapSnapshotFilteredOrderedIterator.call(this, snapshot._allNodes, null, snapshot.aggregates(false)[className].idxs);
}

WebInspector.HeapSnapshotNodesProvider.prototype = {
_serialize: function(node)
{
return {id: node.id, name: node.name, nodeIndex: node.nodeIndex, retainedSize: node.retainedSize, selfSize: node.selfSize, type: node.type};
},

sort: function(comparator)
{
if (this._lastComparator === comparator)
return false;
this._lastComparator = comparator;
var fieldName1 = comparator.fieldName1;
var fieldName2 = comparator.fieldName2;
var ascending1 = comparator.ascending1;
var ascending2 = comparator.ascending2;

var nodeA = new WebInspector.HeapSnapshotNode(this.snapshot);
var nodeB = new WebInspector.HeapSnapshotNode(this.snapshot);

function sortByNodeField(fieldName, ascending, indexA, indexB)
{
nodeA.nodeIndex = indexA;
nodeB.nodeIndex = indexB;
var valueA = nodeA[fieldName];
var valueB = nodeB[fieldName];
var result = valueA < valueB ? -1 : (valueA > valueB ? 1 : 0);
return ascending ? result : -result;
}

if (!this._iterationOrder)
this._createIterationOrder();

function sortByComparator(indexA, indexB) {
var result = sortByNodeField(fieldName1, ascending1, indexA, indexB);
if (result === 0)
result = sortByNodeField(fieldName2, ascending2, indexA, indexB);
return result;
}

this._iterationOrder.sort(sortByComparator);
return true;
}
};

WebInspector.HeapSnapshotNodesProvider.prototype.__proto__ = WebInspector.HeapSnapshotFilteredOrderedIterator.prototype;

WebInspector.HeapSnapshotPathFinder = function(snapshot, targetNodeIndex, skipHidden)
{
this._snapshot = snapshot;
this._maxLength = 1;
this._lengthLimit = 15;
this._targetNodeIndex = targetNodeIndex;
this._currentPath = null;
this._skipHidden = skipHidden;
this._rootChildren = this._fillRootChildren();
}

WebInspector.HeapSnapshotPathFinder.prototype = {
findNext: function()
{
for (var i = 0; i < 100000; ++i) {
if (!this._buildNextPath()) {
if (++this._maxLength >= this._lengthLimit)
return null;
this._currentPath = null;
if (!this._buildNextPath())
return null;
}
if (this._isPathFound())
return {path:this._pathToString(this._currentPath), route:this._pathToRoute(this._currentPath), len:this._currentPath.length};
}

return false;
},

updateRoots: function(filter)
{
if (filter)
filter = eval("(function(){return " + filter + "})()");
this._rootChildren = this._fillRootChildren(filter);  
this._reset();
},

_reset: function()
{
this._maxLength = 1;
this._currentPath = null;
},

_fillRootChildren: function(filter)
{
var result = [];
for (var iter = this._snapshot.rootNode.edges; iter.hasNext(); iter.next()) {
if (!filter || filter(iter.edge.node))
result[iter.edge.nodeIndex] = true;
}
return result;
},

_appendToCurrentPath: function(iter)
{
this._currentPath._cache[this._lastEdge.nodeIndex] = true;
this._currentPath.push(iter);
},

_removeLastFromCurrentPath: function()
{
this._currentPath.pop();
delete this._currentPath._cache[this._lastEdge.nodeIndex];
},

_hasInPath: function(nodeIndex)
{
return this._targetNodeIndex === nodeIndex
|| !!this._currentPath._cache[nodeIndex];
},

_isPathFound: function()
{
return this._currentPath.length === this._maxLength
&& this._lastEdge.nodeIndex in this._rootChildren;
},

get _lastEdgeIter()
{
return this._currentPath[this._currentPath.length - 1];
},

get _lastEdge()
{
return this._lastEdgeIter.item;
},

_skipEdge: function(edge)
{
return edge.isInvisible
|| (this._skipHidden && (edge.isHidden || edge.node.isHidden))
|| this._hasInPath(edge.nodeIndex);
},

_nextEdgeIter: function()
{
var iter = this._lastEdgeIter;
while (iter.hasNext() && this._skipEdge(iter.item))
iter.next();
return iter;
},

_buildNextPath: function()
{
if (this._currentPath !== null) {
var iter = this._lastEdgeIter;
while (true) {
iter.next();
iter = this._nextEdgeIter();
if (iter.hasNext())
return true;
while (true) {
if (this._currentPath.length > 1) {
this._removeLastFromCurrentPath();
iter = this._lastEdgeIter;
iter.next();
iter = this._nextEdgeIter();
if (iter.hasNext()) {
while (this._currentPath.length < this._maxLength) {
iter = this._nextEdgeIter();
if (iter.hasNext())
this._appendToCurrentPath(iter.item.node.retainers);
else
return true;
}
return true;
}
} else
return false;
}
}
} else {
var node = new WebInspector.HeapSnapshotNode(this._snapshot, this._targetNodeIndex);
this._currentPath = [node.retainers];
this._currentPath._cache = {};
while (this._currentPath.length < this._maxLength) {
var iter = this._nextEdgeIter();
if (iter.hasNext())
this._appendToCurrentPath(iter.item.node.retainers);
else
break;
}
return true;
}
},

_nodeToString: function(node)
{
if (node.id === 1)
return node.name;
else
return node.name + "@" + node.id;
},

_pathToString: function(path)
{
if (!path)
return "";
var sPath = [];
for (var j = 0; j < path.length; ++j)
sPath.push(path[j].item.toString());
sPath.push(this._nodeToString(path[path.length - 1].item.node));
sPath.reverse();
return sPath.join("");
},

_pathToRoute: function(path)
{
if (!path)
return [];
var route = [];
route.push(this._targetNodeIndex);
for (var i = 0; i < path.length; ++i)
route.push(path[i].item.nodeIndex);
route.reverse();
return route;
}
};

WebInspector.HeapSnapshotsDiff = function(snapshot, className)
{
this._snapshot = snapshot;
this._className = className;
};

WebInspector.HeapSnapshotsDiff.prototype = {
calculate: function()
{
var aggregates = this._snapshot.aggregates(true)[this._className];
var indexes = aggregates ? aggregates.idxs : [];
var i = 0, l = this._baseIds.length;
var j = 0, m = indexes.length;
var diff = { addedCount: 0, removedCount: 0, addedSize: 0, removedSize: 0 };

var nodeB = new WebInspector.HeapSnapshotNode(this._snapshot, indexes[j]);
while (i < l && j < m) {
var nodeAId = this._baseIds[i];
if (nodeAId < nodeB.id) {
diff.removedCount++;
diff.removedSize += this._baseSelfSizes[i];
++i;
} else if (nodeAId > nodeB.id) {
diff.addedCount++;
diff.addedSize += nodeB.selfSize;
nodeB.nodeIndex = indexes[++j];                
} else {
++i;
nodeB.nodeIndex = indexes[++j];                
}
}
while (i < l) {
diff.removedCount++;
diff.removedSize += this._baseSelfSizes[i];
++i;
}
while (j < m) {
diff.addedCount++;
diff.addedSize += nodeB.selfSize;
nodeB.nodeIndex = indexes[++j];
}
diff.countDelta = diff.addedCount - diff.removedCount;
diff.sizeDelta = diff.addedSize - diff.removedSize;
return diff;
},

pushBaseIds: function(baseIds)
{
this._baseIds = baseIds;
},

pushBaseSelfSizes: function(baseSelfSizes)
{
this._baseSelfSizes = baseSelfSizes;
}
};
;


WebInspector.HeapSnapshotWorkerDispatcher = function(globalObject, postMessage)
{
this._objects = [];
this._global = globalObject;
this._postMessage = postMessage;
}

WebInspector.HeapSnapshotWorkerDispatcher.prototype = {
_findFunction: function(name)
{
var path = name.split(".");
var result = this._global;
for (var i = 0; i < path.length; ++i)
result = result[path[i]];
return result;
},

dispatchMessage: function(event)
{
var data = event.data;
switch (data.disposition) {
case "create": {
var constructorFunction = this._findFunction(data.methodName);
this._objects[data.objectId] = new constructorFunction();
this._postMessage({callId: data.callId});
break;
}
case "dispose": {
delete this._objects[data.objectId];
this._postMessage({callId: data.callId});
break;
}
case "getter": {
var object = this._objects[data.objectId];
var result = object[data.methodName];
this._postMessage({callId: data.callId, result: result});
break;
}
case "factory": {
var object = this._objects[data.objectId];
var result = object[data.methodName].apply(object, data.methodArguments);
if (result)
this._objects[data.newObjectId] = result;            
this._postMessage({callId: data.callId, result: !!result});
break;
}
case "method": {
var object = this._objects[data.objectId];
var result = object[data.methodName].apply(object, data.methodArguments);
this._postMessage({callId: data.callId, result: result});
break;
}
}
}
};
;

function postMessageWrapper(message)
{
postMessage(message);
}

var dispatcher = new WebInspector.HeapSnapshotWorkerDispatcher(this, postMessageWrapper);
addEventListener("message", dispatcher.dispatchMessage.bind(dispatcher), false);
