/*
 * Copyright (C) 2007 Apple Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

var injectedScriptConstructor = (function (InjectedScriptHost, inspectedWindow, injectedScriptId, jsEngine) {

var InjectedScript = {};

InjectedScript.lastBoundObjectId = 1;
InjectedScript.idToWrappedObject = {};
InjectedScript.objectGroups = {};

InjectedScript.wrapObjectForConsole = function(object, canAccessInspectedWindow)
{
    if (canAccessInspectedWindow)
        return InjectedScript.wrapObject(object, "console");
    var result = {};
    result.type = typeof object;
    result.description = InjectedScript._toString(object);
    return result;
}

InjectedScript.wrapObject = function(object, objectGroupName)
{
    try {
        var objectId;
        if (typeof object === "object" || typeof object === "function" || InjectedScript._isHTMLAllCollection(object)) {
            var id = InjectedScript.lastBoundObjectId++;
            objectId = "object#" + id;
            InjectedScript.idToWrappedObject[objectId] = object;

            var group = InjectedScript.objectGroups[objectGroupName];
            if (!group) {
                group = [];
                InjectedScript.objectGroups[objectGroupName] = group;
            }
            group.push(objectId);
        }
        return InjectedScript.createProxyObject(object, objectId);
    } catch (e) {
        return InjectedScript.createProxyObject("[ Exception: " + e.toString() + " ]");
    }
    return InjectedScript.createProxyObject(object, objectId);
};

InjectedScript.unwrapObject = function(objectId) {
    return InjectedScript.idToWrappedObject[objectId];
};

InjectedScript.releaseWrapperObjectGroup = function(objectGroupName) {
    var group = InjectedScript.objectGroups[objectGroupName];
    if (!group)
        return;
    for (var i = 0; i < group.length; i++)
        delete InjectedScript.idToWrappedObject[group[i]];
    delete InjectedScript.objectGroups[objectGroupName];
};

// Called from within InspectorController on the 'inspected page' side.
InjectedScript.reset = function()
{
}

InjectedScript.reset();

InjectedScript.dispatch = function(methodName, args, callId)
{
    var argsArray = eval("(" + args + ")");
    if (callId)
        argsArray.splice(0, 0, callId);  // Methods that run asynchronously have a call back id parameter.
    var result = InjectedScript[methodName].apply(InjectedScript, argsArray);
    if (typeof result === "undefined") {
        inspectedWindow.console.error("Web Inspector error: InjectedScript.%s returns undefined", methodName);
        result = null;
    }
    return result;
}

InjectedScript.getPrototypes = function(nodeId)
{
    var node = InjectedScript._nodeForId(nodeId);
    if (!node)
        return false;

    var result = [];
    for (var prototype = node; prototype; prototype = prototype.__proto__) {
        var title = InjectedScript._describe(prototype, true);
        if (title.match(/Prototype$/)) {
            title = title.replace(/Prototype$/, "");
        }
        result.push(title);
    }
    return result;
}

InjectedScript.getProperties = function(objectProxy, ignoreHasOwnProperty, abbreviate)
{
    var object = InjectedScript._resolveObject(objectProxy);
    if (!InjectedScript._isDefined(object))
        return false;
    var properties = [];
    
    var propertyNames = ignoreHasOwnProperty ? InjectedScript._getPropertyNames(object) : Object.getOwnPropertyNames(object);
    if (!ignoreHasOwnProperty && object.__proto__)
        propertyNames.push("__proto__");

    if (jsEngine === "v8") {
        // Check if the object is a scope.
        if (InjectedScript._isScopeProxy(objectProxy)) {
            propertyNames = [];
            for (var name in object)
                propertyNames.push(name);
        } else {
            // FIXME(http://crbug.com/41243): Object.getOwnPropertyNames may return duplicated names.
            var a = [];
            propertyNames.sort();
            var prev;
            for (var i = 0; i < propertyNames.length; i++) {
                var n = propertyNames[i];
                if (n != prev)
                    a.push(n);
                prev = n;
            }
            propertyNames = a;
        }
    }
    
    // Go over properties, prepare results.
    for (var i = 0; i < propertyNames.length; ++i) {
        var propertyName = propertyNames[i];

        var property = {};
        property.name = propertyName + "";
        property.parentObjectProxy = objectProxy;
        var isGetter = object["__lookupGetter__"] && object.__lookupGetter__(propertyName);
        if (!isGetter) {
            try {
                var childObject = object[propertyName];
                var childObjectProxy = new InjectedScript.createProxyObject(childObject, objectProxy.objectId, abbreviate);
                childObjectProxy.path = objectProxy.path ? objectProxy.path.slice() : [];
                childObjectProxy.path.push(propertyName);
                property.value = childObjectProxy;
            } catch(e) {
                property.value = { description: e.toString() };
                property.isError = true;
            }
        } else {
            // FIXME: this should show something like "getter" (bug 16734).
            property.value = { description: "\u2014" }; // em dash
            property.isGetter = true;
        }
        properties.push(property);
    }
    return properties;
}

InjectedScript._isScopeProxy = function(objectProxy)
{
    var objectId = objectProxy.objectId;
    return typeof objectId === "object" && !objectId.thisObject;
} 

InjectedScript.setPropertyValue = function(objectProxy, propertyName, expression)
{
    var object = InjectedScript._resolveObject(objectProxy);
    if (!InjectedScript._isDefined(object))
        return false;

    var expressionLength = expression.length;
    if (!expressionLength) {
        delete object[propertyName];
        return !(propertyName in object);
    }

    try {
        // Surround the expression in parenthesis so the result of the eval is the result
        // of the whole expression not the last potential sub-expression.

        // There is a regression introduced here: eval is now happening against global object,
        // not call frame while on a breakpoint.
        // TODO: bring evaluation against call frame back.
        var result = inspectedWindow.eval("(" + expression + ")");
        // Store the result in the property.
        object[propertyName] = result;
        return true;
    } catch(e) {
        try {
            var result = inspectedWindow.eval("\"" + expression.replace(/"/g, "\\\"") + "\"");
            object[propertyName] = result;
            return true;
        } catch(e) {
            return false;
        }
    }
}

InjectedScript.getNodePropertyValue = function(nodeId, propertyName)
{
    var node = InjectedScript._nodeForId(nodeId);
    if (!node)
        return false;
    var result = node[propertyName];
    return result !== undefined ? result : false;
}

InjectedScript.setOuterHTML = function(nodeId, value, expanded)
{
    var node = InjectedScript._nodeForId(nodeId);
    if (!node)
        return false;

    var parent = node.parentNode;
    var prevSibling = node.previousSibling;
    node.outerHTML = value;
    var newNode = prevSibling ? prevSibling.nextSibling : parent.firstChild;

    return InjectedScriptHost.pushNodePathToFrontend(newNode, expanded, false);
}

InjectedScript._populatePropertyNames = function(object, resultSet)
{
    for (var o = object; o; o = o.__proto__) {
        try {
            var names = Object.getOwnPropertyNames(o);
            for (var i = 0; i < names.length; ++i)
                resultSet[names[i] + ""] = true;
        } catch (e) {
        }
    }
}

InjectedScript._getPropertyNames = function(object, resultSet)
{
    var propertyNameSet = {};
    InjectedScript._populatePropertyNames(object, propertyNameSet);
    return Object.keys(propertyNameSet);
}

InjectedScript.getCompletions = function(expression, includeInspectorCommandLineAPI, callFrameId)
{
    var props = {};
    try {
        var expressionResult;
        // Evaluate on call frame if call frame id is available.
        if (typeof callFrameId === "number") {
            var callFrame = InjectedScript._callFrameForId(callFrameId);
            if (!callFrame)
                return props;
            if (expression)
                expressionResult = InjectedScript._evaluateOn(callFrame.evaluate, callFrame, expression, true);
            else {
                // Evaluate into properties in scope of the selected call frame.
                var scopeChain = callFrame.scopeChain;
                for (var i = 0; i < scopeChain.length; ++i)
                    InjectedScript._populatePropertyNames(scopeChain[i], props);
            }
        } else {
            if (!expression)
                expression = "this";
            expressionResult = InjectedScript._evaluateOn(inspectedWindow.eval, inspectedWindow, expression);
        }
        if (typeof expressionResult == "object")
            InjectedScript._populatePropertyNames(expressionResult, props);
        if (includeInspectorCommandLineAPI)
            for (var prop in inspectedWindow.console._inspectorCommandLineAPI)
                if (prop.charAt(0) !== '_')
                    props[prop] = true;
    } catch(e) {
    }
    return props;
}

InjectedScript.evaluate = function(expression, objectGroup)
{
    return InjectedScript._evaluateAndWrap(inspectedWindow.eval, inspectedWindow, expression, objectGroup);
}

InjectedScript._evaluateAndWrap = function(evalFunction, object, expression, objectGroup, dontUseCommandLineAPI)
{
    var result = {};
    try {
        result.value = InjectedScript.wrapObject(InjectedScript._evaluateOn(evalFunction, object, expression, dontUseCommandLineAPI), objectGroup);

        // Handle error that might have happened while describing result.
        if (result.value.errorText) {
            result.value = result.value.errorText;
            result.isException = true;
        }
    } catch (e) {
        result.value = e.toString();
        result.isException = true;
    }
    return result;
}

InjectedScript._evaluateOn = function(evalFunction, object, expression, dontUseCommandLineAPI)
{
    InjectedScript._ensureCommandLineAPIInstalled(evalFunction, object);
    // Surround the expression in with statements to inject our command line API so that
    // the window object properties still take more precedent than our API functions.
    if (!dontUseCommandLineAPI)
        expression = "with (window.console._inspectorCommandLineAPI) { with (window) {\n" + expression + "\n} }";

    var value = evalFunction.call(object, expression);

    // When evaluating on call frame error is not thrown, but returned as a value.
    if (InjectedScript._type(value) === "error")
        throw value.toString();

    return value;
}

InjectedScript.addInspectedNode = function(nodeId)
{
    var node = InjectedScript._nodeForId(nodeId);
    if (!node)
        return false;

    InjectedScript._ensureCommandLineAPIInstalled(inspectedWindow.eval, inspectedWindow);
    var inspectedNodes = inspectedWindow.console._inspectorCommandLineAPI._inspectedNodes;
    inspectedNodes.unshift(node);
    if (inspectedNodes.length >= 5)
        inspectedNodes.pop();
    return true;
}

InjectedScript.getNodeId = function(node)
{
    return InjectedScriptHost.pushNodePathToFrontend(node, false, false);
}

InjectedScript.openInInspectedWindow = function(url)
{
    // Don't call window.open on wrapper - popup blocker mutes it.
    // URIs should have no double quotes.
    inspectedWindow.eval("window.open(\"" + url + "\")");
    return true;
}

InjectedScript.callFrames = function()
{
    var callFrame = InjectedScriptHost.currentCallFrame();
    if (!callFrame)
        return false;

    var result = [];
    var depth = 0;
    do {
        result.push(new InjectedScript.CallFrameProxy(depth++, callFrame));
        callFrame = callFrame.caller;
    } while (callFrame);
    return result;
}

InjectedScript.evaluateInCallFrame = function(callFrameId, code, objectGroup)
{
    var callFrame = InjectedScript._callFrameForId(callFrameId);
    if (!callFrame)
        return false;
    return InjectedScript._evaluateAndWrap(callFrame.evaluate, callFrame, code, objectGroup, true);
}

InjectedScript._callFrameForId = function(id)
{
    var callFrame = InjectedScriptHost.currentCallFrame();
    while (--id >= 0 && callFrame)
        callFrame = callFrame.caller;
    return callFrame;
}

InjectedScript.clearConsoleMessages = function()
{
    InjectedScriptHost.clearConsoleMessages();
    return true;
}

InjectedScript._inspectObject = function(o)
{
    if (arguments.length === 0)
        return;

    inspectedWindow.console.log(o);
    if (InjectedScript._type(o) === "node") {
        InjectedScriptHost.pushNodePathToFrontend(o, false, true);
    } else {
        switch (InjectedScript._describe(o)) {
            case "Database":
                InjectedScriptHost.selectDatabase(o);
                break;
            case "Storage":
                InjectedScriptHost.selectDOMStorage(o);
                break;
        }
    }
}

InjectedScript._copy = function(o)
{
    if (InjectedScript._type(o) === "node") {
        var nodeId = InjectedScriptHost.pushNodePathToFrontend(o, false, false);
        InjectedScriptHost.copyNode(nodeId);
    } else {
        InjectedScriptHost.copyText(o);
    }
}

InjectedScript._ensureCommandLineAPIInstalled = function(evalFunction, evalObject)
{
    if (evalFunction.call(evalObject, "window.console._inspectorCommandLineAPI"))
        return;
    var inspectorCommandLineAPI = evalFunction.call(evalObject, "window.console._inspectorCommandLineAPI = { \n\
        $: function() { return document.getElementById.apply(document, arguments) }, \n\
        $$: function() { return document.querySelectorAll.apply(document, arguments) }, \n\
        $x: function(xpath, context) \n\
        { \n\
            var nodes = []; \n\
            try { \n\
                var doc = context || document; \n\
                var results = doc.evaluate(xpath, doc, null, XPathResult.ANY_TYPE, null); \n\
                var node; \n\
                while (node = results.iterateNext()) nodes.push(node); \n\
            } catch (e) {} \n\
            return nodes; \n\
        }, \n\
        dir: function() { return console.dir.apply(console, arguments) }, \n\
        dirxml: function() { return console.dirxml.apply(console, arguments) }, \n\
        keys: function(o) { var a = []; for (var k in o) a.push(k); return a; }, \n\
        values: function(o) { var a = []; for (var k in o) a.push(o[k]); return a; }, \n\
        profile: function() { return console.profile.apply(console, arguments) }, \n\
        profileEnd: function() { return console.profileEnd.apply(console, arguments) }, \n\
        _logEvent: function _inspectorCommandLineAPI_logEvent(e) { console.log(e.type, e); }, \n\
        _allEventTypes: [\"mouse\", \"key\", \"load\", \"unload\", \"abort\", \"error\", \n\
            \"select\", \"change\", \"submit\", \"reset\", \"focus\", \"blur\", \n\
            \"resize\", \"scroll\"], \n\
        _normalizeEventTypes: function(t) \n\
        { \n\
            if (typeof t === \"undefined\") \n\
                t = console._inspectorCommandLineAPI._allEventTypes; \n\
            else if (typeof t === \"string\") \n\
                t = [t]; \n\
            var i, te = []; \n\
            for (i = 0; i < t.length; i++) { \n\
                if (t[i] === \"mouse\") \n\
                    te.splice(0, 0, \"mousedown\", \"mouseup\", \"click\", \"dblclick\", \n\
                        \"mousemove\", \"mouseover\", \"mouseout\"); \n\
                else if (t[i] === \"key\") \n\
                    te.splice(0, 0, \"keydown\", \"keyup\", \"keypress\"); \n\
                else \n\
                    te.push(t[i]); \n\
            } \n\
            return te; \n\
        }, \n\
        monitorEvents: function(o, t) \n\
        { \n\
            if (!o || !o.addEventListener || !o.removeEventListener) \n\
                return; \n\
            t = console._inspectorCommandLineAPI._normalizeEventTypes(t); \n\
            for (i = 0; i < t.length; i++) { \n\
                o.removeEventListener(t[i], console._inspectorCommandLineAPI._logEvent, false); \n\
                o.addEventListener(t[i], console._inspectorCommandLineAPI._logEvent, false); \n\
            } \n\
        }, \n\
        unmonitorEvents: function(o, t) \n\
        { \n\
            if (!o || !o.removeEventListener) \n\
                return; \n\
            t = console._inspectorCommandLineAPI._normalizeEventTypes(t); \n\
            for (i = 0; i < t.length; i++) { \n\
                o.removeEventListener(t[i], console._inspectorCommandLineAPI._logEvent, false); \n\
            } \n\
        }, \n\
        _inspectedNodes: [], \n\
        get $0() { return console._inspectorCommandLineAPI._inspectedNodes[0] }, \n\
        get $1() { return console._inspectorCommandLineAPI._inspectedNodes[1] }, \n\
        get $2() { return console._inspectorCommandLineAPI._inspectedNodes[2] }, \n\
        get $3() { return console._inspectorCommandLineAPI._inspectedNodes[3] }, \n\
        get $4() { return console._inspectorCommandLineAPI._inspectedNodes[4] }, \n\
    };");

    inspectorCommandLineAPI.clear = InjectedScript.clearConsoleMessages;
    inspectorCommandLineAPI.inspect = InjectedScript._inspectObject;
    inspectorCommandLineAPI.copy = InjectedScript._copy;
}

InjectedScript._resolveObject = function(objectProxy)
{
    var object = InjectedScript._objectForId(objectProxy.objectId);
    var path = objectProxy.path;
    var protoDepth = objectProxy.protoDepth;

    // Follow the property path.
    for (var i = 0; InjectedScript._isDefined(object) && path && i < path.length; ++i)
        object = object[path[i]];

    return object;
}

InjectedScript._nodeForId = function(nodeId)
{
    if (!nodeId)
        return null;
    return InjectedScriptHost.nodeForId(nodeId);
}

InjectedScript._objectForId = function(objectId)
{
    // There are three types of object ids used:
    // - numbers point to DOM Node via the InspectorDOMAgent mapping
    // - strings point to console objects cached in InspectorController for lazy evaluation upon them
    // - objects contain complex ids and are currently used for scoped objects
    if (typeof objectId === "number") {
        return InjectedScript._nodeForId(objectId);
    } else if (typeof objectId === "string") {
        return InjectedScript.unwrapObject(objectId);
    } else if (typeof objectId === "object") {
        var callFrame = InjectedScript._callFrameForId(objectId.callFrame);
        if (objectId.thisObject)
            return callFrame.thisObject;
        else
            return callFrame.scopeChain[objectId.chainIndex];
    }
    return objectId;
}

InjectedScript.pushNodeToFrontend = function(objectProxy)
{
    var object = InjectedScript._resolveObject(objectProxy);
    if (!object || InjectedScript._type(object) !== "node")
        return false;
    return InjectedScriptHost.pushNodePathToFrontend(object, false, false);
}

InjectedScript.nodeByPath = function(path)
{
    // We make this call through the injected script only to get a nice
    // callback for it.
    return InjectedScriptHost.pushNodeByPathToFrontend(path.join(","));
}

// Called from within InspectorController on the 'inspected page' side.
InjectedScript.createProxyObject = function(object, objectId, abbreviate)
{
    var result = {};
    result.injectedScriptId = injectedScriptId;
    result.objectId = objectId;
    result.type = InjectedScript._type(object);
    if (result.type === "array")
        result.propertyLength = object.length;

    var type = typeof object;
    
    result.hasChildren = (type === "object" && object !== null && (Object.getOwnPropertyNames(object).length || object.__proto__)) || type === "function";
    try {
        result.description = InjectedScript._describe(object, abbreviate);
    } catch (e) {
        result.errorText = e.toString();
    }
    return result;
}

InjectedScript.evaluateOnSelf = function(funcBody, args)
{
    var func = window.eval("(" + funcBody + ")");
    return func.apply(this, args || []);
}

InjectedScript.CallFrameProxy = function(id, callFrame)
{
    this.id = id;
    this.type = callFrame.type;
    this.functionName = (this.type === "function" ? callFrame.functionName : "");
    this.sourceID = callFrame.sourceID;
    this.line = callFrame.line;
    this.scopeChain = this._wrapScopeChain(callFrame);
}

InjectedScript.CallFrameProxy.prototype = {
    _wrapScopeChain: function(callFrame)
    {
        const GLOBAL_SCOPE = 0;
        const LOCAL_SCOPE = 1;
        const WITH_SCOPE = 2;
        const CLOSURE_SCOPE = 3;
        const CATCH_SCOPE = 4;
    
        var scopeChain = callFrame.scopeChain;
        var scopeChainProxy = [];
        var foundLocalScope = false;
        for (var i = 0; i < scopeChain.length; i++) {
            var scopeType = callFrame.scopeType(i);
            var scopeObject = scopeChain[i];
            var scopeObjectProxy = InjectedScript.createProxyObject(scopeObject, { callFrame: this.id, chainIndex: i }, true);

            switch(scopeType) {
                case LOCAL_SCOPE: {
                    foundLocalScope = true;
                    scopeObjectProxy.isLocal = true;
                    scopeObjectProxy.thisObject = InjectedScript.createProxyObject(callFrame.thisObject, { callFrame: this.id, thisObject: true }, true);
                    break;
                }
                case CLOSURE_SCOPE: {
                    scopeObjectProxy.isClosure = true;
                    break;
                }
                case WITH_SCOPE:
                case CATCH_SCOPE: {
                    if (foundLocalScope && scopeObject instanceof inspectedWindow.Element)
                        scopeObjectProxy.isElement = true;
                    else if (foundLocalScope && scopeObject instanceof inspectedWindow.Document)
                        scopeObjectProxy.isDocument = true;
                    else
                        scopeObjectProxy.isWithBlock = true;
                    break;
                }
            }
            scopeChainProxy.push(scopeObjectProxy);
        }
        return scopeChainProxy;
    }
}

InjectedScript.executeSql = function(callId, databaseId, query)
{
    function successCallback(tx, result)
    {
        var rows = result.rows;
        var result = [];
        var length = rows.length;
        for (var i = 0; i < length; ++i) {
            var data = {};
            result.push(data);
            var row = rows.item(i);
            for (var columnIdentifier in row) {
                // FIXME: (Bug 19439) We should specially format SQL NULL here
                // (which is represented by JavaScript null here, and turned
                // into the string "null" by the String() function).
                var text = row[columnIdentifier];
                data[columnIdentifier] = String(text);
            }
        }
        InjectedScriptHost.reportDidDispatchOnInjectedScript(callId, result, false);
    }

    function errorCallback(tx, error)
    {
        InjectedScriptHost.reportDidDispatchOnInjectedScript(callId, error, false);
    }

    function queryTransaction(tx)
    {
        tx.executeSql(query, null, successCallback, errorCallback);
    }

    var database = InjectedScriptHost.databaseForId(databaseId);
    if (!database)
        errorCallback(null, { code : 2 });  // Return as unexpected version.
    database.transaction(queryTransaction, errorCallback);
    return true;
}

InjectedScript._isDefined = function(object)
{
    return object || InjectedScript._isHTMLAllCollection(object);
}

InjectedScript._isHTMLAllCollection = function(object)
{
    // document.all is reported as undefined, but we still want to process it.
    return (typeof object === "undefined") && inspectedWindow.HTMLAllCollection && object instanceof inspectedWindow.HTMLAllCollection;
}

InjectedScript._type = function(obj)
{
    if (obj === null)
        return "null";

    var type = typeof obj;
    if (type !== "object" && type !== "function") {
        // FIXME(33716): typeof document.all is always 'undefined'.
        if (InjectedScript._isHTMLAllCollection(obj))
            return "array";
        return type;
    }

    // If owning frame has navigated to somewhere else window properties will be undefined.
    // In this case just return result of the typeof.
    if (!inspectedWindow.document)
        return type;

    if (obj instanceof inspectedWindow.Node)
        return (obj.nodeType === undefined ? type : "node");
    if (obj instanceof inspectedWindow.String)
        return "string";
    if (obj instanceof inspectedWindow.Array)
        return "array";
    if (obj instanceof inspectedWindow.Boolean)
        return "boolean";
    if (obj instanceof inspectedWindow.Number)
        return "number";
    if (obj instanceof inspectedWindow.Date)
        return "date";
    if (obj instanceof inspectedWindow.RegExp)
        return "regexp";
    if (obj instanceof inspectedWindow.NodeList)
        return "array";
    if (obj instanceof inspectedWindow.HTMLCollection)
        return "array";
    if (obj instanceof inspectedWindow.Error)
        return "error";
    return type;
}

InjectedScript._describe = function(obj, abbreviated)
{
    var type1 = InjectedScript._type(obj);
    var type2 = InjectedScript._className(obj);

    switch (type1) {
    case "object":
    case "node":
    case "array":
        return type2;
    case "string":
        if (!abbreviated)
            return obj;
        if (obj.length > 100)
            return "\"" + obj.substring(0, 100) + "\u2026\"";
        return "\"" + obj + "\"";
    case "function":
        var objectText = InjectedScript._toString(obj);
        if (!/^function /.test(objectText))
            objectText = (type2 == "object") ? type1 : type2;
        else if (abbreviated)
            objectText = /.*/.exec(obj)[0].replace(/ +$/g, "");
        return objectText;
    default:
        return InjectedScript._toString(obj);
    }
}

InjectedScript._toString = function(obj)
{
    // We don't use String(obj) because inspectedWindow.String is undefined if owning frame navigated to another page.
    return "" + obj;
}

InjectedScript._className = function(obj)
{
    // We can't use the same code for fetching class names of the dom bindings prototype chain.
    // Both of the methods below result in "Object" names on the foreign engine bindings.
    // I gave up and am using a check below to distinguish between the egine bingings.

    if (jsEngine == "JSC") {
        var str = inspectedWindow.Object ? inspectedWindow.Object.prototype.toString.call(obj) : InjectedScript._toString(obj);
        return str.replace(/^\[object (.*)\]$/i, "$1");
    } else {
        // V8
        if (typeof obj !== "object")
            return "null";
        return obj.constructor.name || "Object";
    }
}

return InjectedScript;
});