axmol/cocos/scripting/js-bindings/script/debugger/webconsole/utils.js

2045 lines
56 KiB
JavaScript

/* -*- js-indent-level: 2; indent-tabs-mode: nil -*- */
/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
// const {Cc, Ci, Cu, components} = require("chrome");
// const {isWindowIncluded} = require("devtools/toolkit/layout/utils");
// Cu.import("resource://gre/modules/XPCOMUtils.jsm");
// loader.lazyImporter(this, "Services", "resource://gre/modules/Services.jsm");
// TODO: Bug 842672 - browser/ imports modules from toolkit/.
// Note that these are only used in WebConsoleCommands, see $0 and pprint().
// loader.lazyImporter(this, "VariablesView", "resource:///modules/devtools/VariablesView.jsm");
// const DevToolsUtils = require("devtools/toolkit/DevToolsUtils");
// Match the function name from the result of toString() or toSource().
//
// Examples:
// (function foobar(a, b) { ...
// function foobar2(a) { ...
// function() { ...
var exports = exports || {};
const REGEX_MATCH_FUNCTION_NAME = /^\(?function\s+([^(\s]+)\s*\(/;
// Match the function arguments from the result of toString() or toSource().
const REGEX_MATCH_FUNCTION_ARGS = /^\(?function\s*[^\s(]*\s*\((.+?)\)/;
// Number of terminal entries for the self-xss prevention to go away
const CONSOLE_ENTRY_THRESHOLD = 5;
// Provide an easy way to bail out of even attempting an autocompletion
// if an object has way too many properties. Protects against large objects
// with numeric values that wouldn't be tallied towards MAX_AUTOCOMPLETIONS.
const MAX_AUTOCOMPLETE_ATTEMPTS = exports.MAX_AUTOCOMPLETE_ATTEMPTS = 100000;
const CONSOLE_WORKER_IDS = exports.CONSOLE_WORKER_IDS =[ 'SharedWorker', 'ServiceWorker', 'Worker' ];
// Prevent iterating over too many properties during autocomplete suggestions.
const MAX_AUTOCOMPLETIONS = exports.MAX_AUTOCOMPLETIONS = 1500;
var WebConsoleUtils = {
/**
* Wrap a string in an nsISupportsString object.
*
* @param string aString
* @return nsISupportsString
*/
supportsString: function WCU_supportsString(aString)
{
let str = Cc["@mozilla.org/supports-string;1"].
createInstance(Ci.nsISupportsString);
str.data = aString;
return str;
},
/**
* Clone an object.
*
* @param object aObject
* The object you want cloned.
* @param boolean aRecursive
* Tells if you want to dig deeper into the object, to clone
* recursively.
* @param function [aFilter]
* Optional, filter function, called for every property. Three
* arguments are passed: key, value and object. Return true if the
* property should be added to the cloned object. Return false to skip
* the property.
* @return object
* The cloned object.
*/
cloneObject: function WCU_cloneObject(aObject, aRecursive, aFilter)
{
if (typeof aObject != "object") {
return aObject;
}
let temp;
if (Array.isArray(aObject)) {
temp = [];
Array.forEach(aObject, function(aValue, aIndex) {
if (!aFilter || aFilter(aIndex, aValue, aObject)) {
temp.push(aRecursive ? WCU_cloneObject(aValue) : aValue);
}
});
}
else {
temp = {};
for (let key in aObject) {
let value = aObject[key];
if (aObject.hasOwnProperty(key) &&
(!aFilter || aFilter(key, value, aObject))) {
temp[key] = aRecursive ? WCU_cloneObject(value) : value;
}
}
}
return temp;
},
/**
* Copies certain style attributes from one element to another.
*
* @param nsIDOMNode aFrom
* The target node.
* @param nsIDOMNode aTo
* The destination node.
*/
copyTextStyles: function WCU_copyTextStyles(aFrom, aTo)
{
let win = aFrom.ownerDocument.defaultView;
let style = win.getComputedStyle(aFrom);
aTo.style.fontFamily = style.getPropertyCSSValue("font-family").cssText;
aTo.style.fontSize = style.getPropertyCSSValue("font-size").cssText;
aTo.style.fontWeight = style.getPropertyCSSValue("font-weight").cssText;
aTo.style.fontStyle = style.getPropertyCSSValue("font-style").cssText;
},
/**
* Gets the ID of the inner window of this DOM window.
*
* @param nsIDOMWindow aWindow
* @return integer
* Inner ID for the given aWindow.
*/
getInnerWindowId: function WCU_getInnerWindowId(aWindow)
{
return aWindow.QueryInterface(Ci.nsIInterfaceRequestor).
getInterface(Ci.nsIDOMWindowUtils).currentInnerWindowID;
},
/**
* Recursively gather a list of inner window ids given a
* top level window.
*
* @param nsIDOMWindow aWindow
* @return Array
* list of inner window ids.
*/
getInnerWindowIDsForFrames: function WCU_getInnerWindowIDsForFrames(aWindow)
{
let innerWindowID = this.getInnerWindowId(aWindow);
let ids = [innerWindowID];
if (aWindow.frames) {
for (let i = 0; i < aWindow.frames.length; i++) {
let frame = aWindow.frames[i];
ids = ids.concat(this.getInnerWindowIDsForFrames(frame));
}
}
return ids;
},
/**
* Gets the ID of the outer window of this DOM window.
*
* @param nsIDOMWindow aWindow
* @return integer
* Outer ID for the given aWindow.
*/
getOuterWindowId: function WCU_getOuterWindowId(aWindow)
{
return aWindow.QueryInterface(Ci.nsIInterfaceRequestor).
getInterface(Ci.nsIDOMWindowUtils).outerWindowID;
},
/**
* Abbreviates the given source URL so that it can be displayed flush-right
* without being too distracting.
*
* @param string aSourceURL
* The source URL to shorten.
* @param object [aOptions]
* Options:
* - onlyCropQuery: boolean that tells if the URL abbreviation function
* should only remove the query parameters and the hash fragment from
* the given URL.
* @return string
* The abbreviated form of the source URL.
*/
abbreviateSourceURL:
function WCU_abbreviateSourceURL(aSourceURL, aOptions = {})
{
if (!aOptions.onlyCropQuery && aSourceURL.substr(0, 5) == "data:") {
let commaIndex = aSourceURL.indexOf(",");
if (commaIndex > -1) {
aSourceURL = "data:" + aSourceURL.substring(commaIndex + 1);
}
}
// Remove any query parameters.
let hookIndex = aSourceURL.indexOf("?");
if (hookIndex > -1) {
aSourceURL = aSourceURL.substring(0, hookIndex);
}
// Remove any hash fragments.
let hashIndex = aSourceURL.indexOf("#");
if (hashIndex > -1) {
aSourceURL = aSourceURL.substring(0, hashIndex);
}
// Remove a trailing "/".
if (aSourceURL[aSourceURL.length - 1] == "/") {
aSourceURL = aSourceURL.replace(/\/+$/, "");
}
// Remove all but the last path component.
if (!aOptions.onlyCropQuery) {
let slashIndex = aSourceURL.lastIndexOf("/");
if (slashIndex > -1) {
aSourceURL = aSourceURL.substring(slashIndex + 1);
}
}
return aSourceURL;
},
/**
* Tells if the given function is native or not.
*
* @param function aFunction
* The function you want to check if it is native or not.
* @return boolean
* True if the given function is native, false otherwise.
*/
isNativeFunction: function WCU_isNativeFunction(aFunction)
{
return typeof aFunction == "function" && !("prototype" in aFunction);
},
/**
* Tells if the given property of the provided object is a non-native getter or
* not.
*
* @param object aObject
* The object that contains the property.
* @param string aProp
* The property you want to check if it is a getter or not.
* @return boolean
* True if the given property is a getter, false otherwise.
*/
isNonNativeGetter: function WCU_isNonNativeGetter(aObject, aProp)
{
if (typeof aObject != "object") {
return false;
}
let desc = this.getPropertyDescriptor(aObject, aProp);
return desc && desc.get && !this.isNativeFunction(desc.get);
},
/**
* Get the property descriptor for the given object.
*
* @param object aObject
* The object that contains the property.
* @param string aProp
* The property you want to get the descriptor for.
* @return object
* Property descriptor.
*/
getPropertyDescriptor: function WCU_getPropertyDescriptor(aObject, aProp)
{
let desc = null;
while (aObject) {
try {
if ((desc = Object.getOwnPropertyDescriptor(aObject, aProp))) {
break;
}
} catch (ex) {
// Native getters throw here. See bug 520882.
// null throws TypeError.
if (ex.name != "NS_ERROR_XPC_BAD_CONVERT_JS" &&
ex.name != "NS_ERROR_XPC_BAD_OP_ON_WN_PROTO" &&
ex.name != "TypeError") {
throw ex;
}
}
try {
aObject = Object.getPrototypeOf(aObject);
} catch (ex) {
if (ex.name == "TypeError") {
return desc;
}
throw ex;
}
}
return desc;
},
/**
* Sort function for object properties.
*
* @param object a
* Property descriptor.
* @param object b
* Property descriptor.
* @return integer
* -1 if a.name < b.name,
* 1 if a.name > b.name,
* 0 otherwise.
*/
propertiesSort: function WCU_propertiesSort(a, b)
{
// Convert the pair.name to a number for later sorting.
let aNumber = parseFloat(a.name);
let bNumber = parseFloat(b.name);
// Sort numbers.
if (!isNaN(aNumber) && isNaN(bNumber)) {
return -1;
}
else if (isNaN(aNumber) && !isNaN(bNumber)) {
return 1;
}
else if (!isNaN(aNumber) && !isNaN(bNumber)) {
return aNumber - bNumber;
}
// Sort string.
else if (a.name < b.name) {
return -1;
}
else if (a.name > b.name) {
return 1;
}
else {
return 0;
}
},
/**
* Create a grip for the given value. If the value is an object,
* an object wrapper will be created.
*
* @param mixed aValue
* The value you want to create a grip for, before sending it to the
* client.
* @param function aObjectWrapper
* If the value is an object then the aObjectWrapper function is
* invoked to give us an object grip. See this.getObjectGrip().
* @return mixed
* The value grip.
*/
createValueGrip: function WCU_createValueGrip(aValue, aObjectWrapper)
{
switch (typeof aValue) {
case "boolean":
return aValue;
case "string":
return aObjectWrapper(aValue);
case "number":
if (aValue === Infinity) {
return { type: "Infinity" };
}
else if (aValue === -Infinity) {
return { type: "-Infinity" };
}
else if (Number.isNaN(aValue)) {
return { type: "NaN" };
}
else if (!aValue && 1 / aValue === -Infinity) {
return { type: "-0" };
}
return aValue;
case "undefined":
return { type: "undefined" };
case "object":
if (aValue === null) {
return { type: "null" };
}
case "function":
return aObjectWrapper(aValue);
default:
Cu.reportError("Failed to provide a grip for value of " + typeof aValue
+ ": " + aValue);
return null;
}
},
/**
* Check if the given object is an iterator or a generator.
*
* @param object aObject
* The object you want to check.
* @return boolean
* True if the given object is an iterator or a generator, otherwise
* false is returned.
*/
isIteratorOrGenerator: function WCU_isIteratorOrGenerator(aObject)
{
if (aObject === null) {
return false;
}
if (typeof aObject == "object") {
if (typeof aObject.__iterator__ == "function" ||
aObject.constructor && aObject.constructor.name == "Iterator") {
return true;
}
try {
let str = aObject.toString();
if (typeof aObject.next == "function" &&
str.indexOf("[object Generator") == 0) {
return true;
}
}
catch (ex) {
// window.history.next throws in the typeof check above.
return false;
}
}
return false;
},
/**
* Determine if the given request mixes HTTP with HTTPS content.
*
* @param string aRequest
* Location of the requested content.
* @param string aLocation
* Location of the current page.
* @return boolean
* True if the content is mixed, false if not.
*/
isMixedHTTPSRequest: function WCU_isMixedHTTPSRequest(aRequest, aLocation)
{
try {
let requestURI = Services.io.newURI(aRequest, null, null);
let contentURI = Services.io.newURI(aLocation, null, null);
return (contentURI.scheme == "https" && requestURI.scheme != "https");
}
catch (ex) {
return false;
}
},
/**
* Helper function to deduce the name of the provided function.
*
* @param funtion aFunction
* The function whose name will be returned.
* @return string
* Function name.
*/
getFunctionName: function WCF_getFunctionName(aFunction)
{
let name = null;
if (aFunction.name) {
name = aFunction.name;
}
else {
let desc;
try {
desc = aFunction.getOwnPropertyDescriptor("displayName");
}
catch (ex) { }
if (desc && typeof desc.value == "string") {
name = desc.value;
}
}
if (!name) {
try {
let str = (aFunction.toString() || aFunction.toSource()) + "";
name = (str.match(REGEX_MATCH_FUNCTION_NAME) || [])[1];
}
catch (ex) { }
}
return name;
},
/**
* Get the object class name. For example, the |window| object has the Window
* class name (based on [object Window]).
*
* @param object aObject
* The object you want to get the class name for.
* @return string
* The object class name.
*/
getObjectClassName: function WCU_getObjectClassName(aObject)
{
if (aObject === null) {
return "null";
}
if (aObject === undefined) {
return "undefined";
}
let type = typeof aObject;
if (type != "object") {
// Grip class names should start with an uppercase letter.
return type.charAt(0).toUpperCase() + type.substr(1);
}
let className;
try {
className = ((aObject + "").match(/^\[object (\S+)\]$/) || [])[1];
if (!className) {
className = ((aObject.constructor + "").match(/^\[object (\S+)\]$/) || [])[1];
}
if (!className && typeof aObject.constructor == "function") {
className = this.getFunctionName(aObject.constructor);
}
}
catch (ex) { }
return className;
},
/**
* Check if the given value is a grip with an actor.
*
* @param mixed aGrip
* Value you want to check if it is a grip with an actor.
* @return boolean
* True if the given value is a grip with an actor.
*/
isActorGrip: function WCU_isActorGrip(aGrip)
{
return aGrip && typeof(aGrip) == "object" && aGrip.actor;
},
/**
* Value of devtools.selfxss.count preference
*
* @type number
* @private
*/
_usageCount: 0,
get usageCount() {
if (WebConsoleUtils._usageCount < CONSOLE_ENTRY_THRESHOLD) {
WebConsoleUtils._usageCount = Services.prefs.getIntPref("devtools.selfxss.count");
if (Services.prefs.getBoolPref("devtools.chrome.enabled")) {
WebConsoleUtils.usageCount = CONSOLE_ENTRY_THRESHOLD;
}
}
return WebConsoleUtils._usageCount;
},
set usageCount(newUC) {
if (newUC <= CONSOLE_ENTRY_THRESHOLD) {
WebConsoleUtils._usageCount = newUC;
Services.prefs.setIntPref("devtools.selfxss.count", newUC);
}
},
/**
* The inputNode "paste" event handler generator. Helps prevent self-xss attacks
*
* @param nsIDOMElement inputField
* @param nsIDOMElement notificationBox
* @returns A function to be added as a handler to 'paste' and 'drop' events on the input field
*/
pasteHandlerGen: function WCU_pasteHandlerGen(inputField, notificationBox, msg, okstring) {
let handler = function WCU_pasteHandler(aEvent) {
if (WebConsoleUtils.usageCount >= CONSOLE_ENTRY_THRESHOLD) {
inputField.removeEventListener("paste", handler);
inputField.removeEventListener("drop", handler);
return true;
}
if (notificationBox.getNotificationWithValue("selfxss-notification")) {
aEvent.preventDefault();
aEvent.stopPropagation();
return false;
}
let notification = notificationBox.appendNotification(msg,
"selfxss-notification", null, notificationBox.PRIORITY_WARNING_HIGH, null,
function(eventType) {
// Cleanup function if notification is dismissed
if (eventType == "removed") {
inputField.removeEventListener("keyup", pasteKeyUpHandler);
}
});
function pasteKeyUpHandler(aEvent2) {
let value = inputField.value || inputField.textContent;
if (value.includes(okstring)) {
notificationBox.removeNotification(notification);
inputField.removeEventListener("keyup", pasteKeyUpHandler);
WebConsoleUtils.usageCount = CONSOLE_ENTRY_THRESHOLD;
}
}
inputField.addEventListener("keyup", pasteKeyUpHandler);
aEvent.preventDefault();
aEvent.stopPropagation();
return false;
};
return handler;
},
};
exports.Utils = WebConsoleUtils;
//////////////////////////////////////////////////////////////////////////
// Localization
//////////////////////////////////////////////////////////////////////////
WebConsoleUtils.l10n = function WCU_l10n(aBundleURI)
{
this._bundleUri = aBundleURI;
};
WebConsoleUtils.l10n.prototype = {
_stringBundle: null,
get stringBundle()
{
if (!this._stringBundle) {
this._stringBundle = Services.strings.createBundle(this._bundleUri);
}
return this._stringBundle;
},
/**
* Generates a formatted timestamp string for displaying in console messages.
*
* @param integer [aMilliseconds]
* Optional, allows you to specify the timestamp in milliseconds since
* the UNIX epoch.
* @return string
* The timestamp formatted for display.
*/
timestampString: function WCU_l10n_timestampString(aMilliseconds)
{
let d = new Date(aMilliseconds ? aMilliseconds : null);
let hours = d.getHours(), minutes = d.getMinutes();
let seconds = d.getSeconds(), milliseconds = d.getMilliseconds();
let parameters = [hours, minutes, seconds, milliseconds];
return this.getFormatStr("timestampFormat", parameters);
},
/**
* Retrieve a localized string.
*
* @param string aName
* The string name you want from the Web Console string bundle.
* @return string
* The localized string.
*/
getStr: function WCU_l10n_getStr(aName)
{
let result;
try {
result = this.stringBundle.GetStringFromName(aName);
}
catch (ex) {
Cu.reportError("Failed to get string: " + aName);
throw ex;
}
return result;
},
/**
* Retrieve a localized string formatted with values coming from the given
* array.
*
* @param string aName
* The string name you want from the Web Console string bundle.
* @param array aArray
* The array of values you want in the formatted string.
* @return string
* The formatted local string.
*/
getFormatStr: function WCU_l10n_getFormatStr(aName, aArray)
{
let result;
try {
result = this.stringBundle.formatStringFromName(aName, aArray, aArray.length);
}
catch (ex) {
Cu.reportError("Failed to format string: " + aName);
throw ex;
}
return result;
},
};
//////////////////////////////////////////////////////////////////////////
// JS Completer
//////////////////////////////////////////////////////////////////////////
(function _JSPP(WCU) {
const STATE_NORMAL = 0;
const STATE_QUOTE = 2;
const STATE_DQUOTE = 3;
const OPEN_BODY = "{[(".split("");
const CLOSE_BODY = "}])".split("");
const OPEN_CLOSE_BODY = {
"{": "}",
"[": "]",
"(": ")",
};
/**
* Analyses a given string to find the last statement that is interesting for
* later completion.
*
* @param string aStr
* A string to analyse.
*
* @returns object
* If there was an error in the string detected, then a object like
*
* { err: "ErrorMesssage" }
*
* is returned, otherwise a object like
*
* {
* state: STATE_NORMAL|STATE_QUOTE|STATE_DQUOTE,
* startPos: index of where the last statement begins
* }
*/
function findCompletionBeginning(aStr)
{
let bodyStack = [];
let state = STATE_NORMAL;
let start = 0;
let c;
for (let i = 0; i < aStr.length; i++) {
c = aStr[i];
switch (state) {
// Normal JS state.
case STATE_NORMAL:
if (c == '"') {
state = STATE_DQUOTE;
}
else if (c == "'") {
state = STATE_QUOTE;
}
else if (c == ";") {
start = i + 1;
}
else if (c == " ") {
start = i + 1;
}
else if (OPEN_BODY.indexOf(c) != -1) {
bodyStack.push({
token: c,
start: start
});
start = i + 1;
}
else if (CLOSE_BODY.indexOf(c) != -1) {
var last = bodyStack.pop();
if (!last || OPEN_CLOSE_BODY[last.token] != c) {
return {
err: "syntax error"
};
}
if (c == "}") {
start = i + 1;
}
else {
start = last.start;
}
}
break;
// Double quote state > " <
case STATE_DQUOTE:
if (c == "\\") {
i++;
}
else if (c == "\n") {
return {
err: "unterminated string literal"
};
}
else if (c == '"') {
state = STATE_NORMAL;
}
break;
// Single quote state > ' <
case STATE_QUOTE:
if (c == "\\") {
i++;
}
else if (c == "\n") {
return {
err: "unterminated string literal"
};
}
else if (c == "'") {
state = STATE_NORMAL;
}
break;
}
}
return {
state: state,
startPos: start
};
}
/**
* Provides a list of properties, that are possible matches based on the passed
* Debugger.Environment/Debugger.Object and inputValue.
*
* @param object aDbgObject
* When the debugger is not paused this Debugger.Object wraps the scope for autocompletion.
* It is null if the debugger is paused.
* @param object anEnvironment
* When the debugger is paused this Debugger.Environment is the scope for autocompletion.
* It is null if the debugger is not paused.
* @param string aInputValue
* Value that should be completed.
* @param number [aCursor=aInputValue.length]
* Optional offset in the input where the cursor is located. If this is
* omitted then the cursor is assumed to be at the end of the input
* value.
* @returns null or object
* If no completion valued could be computed, null is returned,
* otherwise a object with the following form is returned:
* {
* matches: [ string, string, string ],
* matchProp: Last part of the inputValue that was used to find
* the matches-strings.
* }
*/
function JSPropertyProvider(aDbgObject, anEnvironment, aInputValue, aCursor)
{
if (aCursor === undefined) {
aCursor = aInputValue.length;
}
let inputValue = aInputValue.substring(0, aCursor);
// Analyse the inputValue and find the beginning of the last part that
// should be completed.
let beginning = findCompletionBeginning(inputValue);
// There was an error analysing the string.
if (beginning.err) {
return null;
}
// If the current state is not STATE_NORMAL, then we are inside of an string
// which means that no completion is possible.
if (beginning.state != STATE_NORMAL) {
return null;
}
let completionPart = inputValue.substring(beginning.startPos);
// Don't complete on just an empty string.
if (completionPart.trim() == "") {
return null;
}
let lastDot = completionPart.lastIndexOf(".");
if (lastDot > 0 &&
(completionPart[0] == "'" || completionPart[0] == '"') &&
completionPart[lastDot - 1] == completionPart[0]) {
// We are completing a string literal.
let matchProp = completionPart.slice(lastDot + 1);
return getMatchedProps(String.prototype, matchProp);
}
// We are completing a variable / a property lookup.
let properties = completionPart.split(".");
let matchProp = properties.pop().trimLeft();
let obj = aDbgObject;
// The first property must be found in the environment if the debugger is
// paused.
if (anEnvironment) {
if (properties.length == 0) {
return getMatchedPropsInEnvironment(anEnvironment, matchProp);
}
obj = getVariableInEnvironment(anEnvironment, properties.shift());
}
if (!isObjectUsable(obj)) {
return null;
}
// We get the rest of the properties recursively starting from the Debugger.Object
// that wraps the first property
for (let prop of properties) {
prop = prop.trim();
if (!prop) {
return null;
}
if (/\[\d+\]$/.test(prop)) {
// The property to autocomplete is a member of array. For example
// list[i][j]..[n]. Traverse the array to get the actual element.
obj = getArrayMemberProperty(obj, prop);
}
else {
obj = DevToolsUtils.getProperty(obj, prop);
}
if (!isObjectUsable(obj)) {
return null;
}
}
// If the final property is a primitive
if (typeof obj != "object") {
return getMatchedProps(obj, matchProp);
}
return getMatchedPropsInDbgObject(obj, matchProp);
}
/**
* Get the array member of aObj for the given aProp. For example, given
* aProp='list[0][1]' the element at [0][1] of aObj.list is returned.
*
* @param object aObj
* The object to operate on.
* @param string aProp
* The property to return.
* @return null or Object
* Returns null if the property couldn't be located. Otherwise the array
* member identified by aProp.
*/
function getArrayMemberProperty(aObj, aProp)
{
// First get the array.
let obj = aObj;
let propWithoutIndices = aProp.substr(0, aProp.indexOf("["));
obj = DevToolsUtils.getProperty(obj, propWithoutIndices);
if (!isObjectUsable(obj)) {
return null;
}
// Then traverse the list of indices to get the actual element.
let result;
let arrayIndicesRegex = /\[[^\]]*\]/g;
while ((result = arrayIndicesRegex.exec(aProp)) !== null) {
let indexWithBrackets = result[0];
let indexAsText = indexWithBrackets.substr(1, indexWithBrackets.length - 2);
let index = parseInt(indexAsText);
if (isNaN(index)) {
return null;
}
obj = DevToolsUtils.getProperty(obj, index);
if (!isObjectUsable(obj)) {
return null;
}
}
return obj;
}
/**
* Check if the given Debugger.Object can be used for autocomplete.
*
* @param Debugger.Object aObject
* The Debugger.Object to check.
* @return boolean
* True if further inspection into the object is possible, or false
* otherwise.
*/
function isObjectUsable(aObject)
{
if (aObject == null) {
return false;
}
if (typeof aObject == "object" && aObject.class == "DeadObject") {
return false;
}
return true;
}
/**
* @see getExactMatch_impl()
*/
function getVariableInEnvironment(anEnvironment, aName)
{
return getExactMatch_impl(anEnvironment, aName, DebuggerEnvironmentSupport);
}
/**
* @see getMatchedProps_impl()
*/
function getMatchedPropsInEnvironment(anEnvironment, aMatch)
{
return getMatchedProps_impl(anEnvironment, aMatch, DebuggerEnvironmentSupport);
}
/**
* @see getMatchedProps_impl()
*/
function getMatchedPropsInDbgObject(aDbgObject, aMatch)
{
return getMatchedProps_impl(aDbgObject, aMatch, DebuggerObjectSupport);
}
/**
* @see getMatchedProps_impl()
*/
function getMatchedProps(aObj, aMatch)
{
if (typeof aObj != "object") {
aObj = aObj.constructor.prototype;
}
return getMatchedProps_impl(aObj, aMatch, JSObjectSupport);
}
/**
* Get all properties in the given object (and its parent prototype chain) that
* match a given prefix.
*
* @param mixed aObj
* Object whose properties we want to filter.
* @param string aMatch
* Filter for properties that match this string.
* @return object
* Object that contains the matchProp and the list of names.
*/
function getMatchedProps_impl(aObj, aMatch, {chainIterator, getProperties})
{
let matches = new Set();
let numProps = 0;
// We need to go up the prototype chain.
let iter = chainIterator(aObj);
for (let obj of iter) {
let props = getProperties(obj);
numProps += props.length;
// If there are too many properties to event attempt autocompletion,
// or if we have already added the max number, then stop looping
// and return the partial set that has already been discovered.
if (numProps >= MAX_AUTOCOMPLETE_ATTEMPTS ||
matches.size >= MAX_AUTOCOMPLETIONS) {
break;
}
for (let i = 0; i < props.length; i++) {
let prop = props[i];
if (prop.indexOf(aMatch) != 0) {
continue;
}
if (prop.indexOf('-') > -1) {
continue;
}
// If it is an array index, we can't take it.
// This uses a trick: converting a string to a number yields NaN if
// the operation failed, and NaN is not equal to itself.
if (+prop != +prop) {
matches.add(prop);
}
if (matches.size >= MAX_AUTOCOMPLETIONS) {
break;
}
}
}
return {
matchProp: aMatch,
matches: [...matches],
};
}
/**
* Returns a property value based on its name from the given object, by
* recursively checking the object's prototype.
*
* @param object aObj
* An object to look the property into.
* @param string aName
* The property that is looked up.
* @returns object|undefined
* A Debugger.Object if the property exists in the object's prototype
* chain, undefined otherwise.
*/
function getExactMatch_impl(aObj, aName, {chainIterator, getProperty})
{
// We need to go up the prototype chain.
let iter = chainIterator(aObj);
for (let obj of iter) {
let prop = getProperty(obj, aName, aObj);
if (prop) {
return prop.value;
}
}
return undefined;
}
var JSObjectSupport = {
chainIterator: function*(aObj)
{
while (aObj) {
yield aObj;
aObj = Object.getPrototypeOf(aObj);
}
},
getProperties: function(aObj)
{
return Object.getOwnPropertyNames(aObj);
},
getProperty: function()
{
// getProperty is unsafe with raw JS objects.
throw "Unimplemented!";
},
};
var DebuggerObjectSupport = {
chainIterator: function*(aObj)
{
while (aObj) {
yield aObj;
aObj = aObj.proto;
}
},
getProperties: function(aObj)
{
return aObj.getOwnPropertyNames();
},
getProperty: function(aObj, aName, aRootObj)
{
// This is left unimplemented in favor to DevToolsUtils.getProperty().
throw "Unimplemented!";
},
};
var DebuggerEnvironmentSupport = {
chainIterator: function*(aObj)
{
while (aObj) {
yield aObj;
aObj = aObj.parent;
}
},
getProperties: function(aObj)
{
return aObj.names();
},
getProperty: function(aObj, aName)
{
// TODO: we should use getVariableDescriptor() here - bug 725815.
let result = aObj.getVariable(aName);
// FIXME: Need actual UI, bug 941287.
if (result === undefined || result.optimizedOut || result.missingArguments) {
return null;
}
return { value: result };
},
};
exports.JSPropertyProvider = DevToolsUtils.makeInfallible(JSPropertyProvider);
})(WebConsoleUtils);
///////////////////////////////////////////////////////////////////////////////
// The page errors listener
///////////////////////////////////////////////////////////////////////////////
/**
* The nsIConsoleService listener. This is used to send all of the console
* messages (JavaScript, CSS and more) to the remote Web Console instance.
*
* @constructor
* @param nsIDOMWindow [aWindow]
* Optional - the window object for which we are created. This is used
* for filtering out messages that belong to other windows.
* @param object aListener
* The listener object must have one method:
* - onConsoleServiceMessage(). This method is invoked with one argument,
* the nsIConsoleMessage, whenever a relevant message is received.
*/
function ConsoleServiceListener(aWindow, aListener)
{
this.window = aWindow;
this.listener = aListener;
}
exports.ConsoleServiceListener = ConsoleServiceListener;
ConsoleServiceListener.prototype =
{
// QueryInterface: XPCOMUtils.generateQI([Ci.nsIConsoleListener]),
/**
* The content window for which we listen to page errors.
* @type nsIDOMWindow
*/
window: null,
/**
* The listener object which is notified of messages from the console service.
* @type object
*/
listener: null,
/**
* Initialize the nsIConsoleService listener.
*/
init: function CSL_init()
{
Services.console.registerListener(this);
},
/**
* The nsIConsoleService observer. This method takes all the script error
* messages belonging to the current window and sends them to the remote Web
* Console instance.
*
* @param nsIConsoleMessage aMessage
* The message object coming from the nsIConsoleService.
*/
observe: function CSL_observe(aMessage)
{
if (!this.listener) {
return;
}
if (this.window) {
if (!(aMessage instanceof Ci.nsIScriptError) ||
!aMessage.outerWindowID ||
!this.isCategoryAllowed(aMessage.category)) {
return;
}
let errorWindow = Services.wm.getOuterWindowWithId(aMessage .outerWindowID);
if (!errorWindow || !isWindowIncluded(this.window, errorWindow)) {
return;
}
}
this.listener.onConsoleServiceMessage(aMessage);
},
/**
* Check if the given message category is allowed to be tracked or not.
* We ignore chrome-originating errors as we only care about content.
*
* @param string aCategory
* The message category you want to check.
* @return boolean
* True if the category is allowed to be logged, false otherwise.
*/
isCategoryAllowed: function CSL_isCategoryAllowed(aCategory)
{
if (!aCategory) {
return false;
}
switch (aCategory) {
case "XPConnect JavaScript":
case "component javascript":
case "chrome javascript":
case "chrome registration":
case "XBL":
case "XBL Prototype Handler":
case "XBL Content Sink":
case "xbl javascript":
return false;
}
return true;
},
/**
* Get the cached page errors for the current inner window and its (i)frames.
*
* @param boolean [aIncludePrivate=false]
* Tells if you want to also retrieve messages coming from private
* windows. Defaults to false.
* @return array
* The array of cached messages. Each element is an nsIScriptError or
* an nsIConsoleMessage
*/
getCachedMessages: function CSL_getCachedMessages(aIncludePrivate = false)
{
let errors = Services.console.getMessageArray() || [];
// if !this.window, we're in a browser console. Still need to filter
// private messages.
if (!this.window) {
return errors.filter((aError) => {
if (aError instanceof Ci.nsIScriptError) {
if (!aIncludePrivate && aError.isFromPrivateWindow) {
return false;
}
}
return true;
});
}
let ids = WebConsoleUtils.getInnerWindowIDsForFrames(this.window);
return errors.filter((aError) => {
if (aError instanceof Ci.nsIScriptError) {
if (!aIncludePrivate && aError.isFromPrivateWindow) {
return false;
}
if (ids &&
(ids.indexOf(aError.innerWindowID) == -1 ||
!this.isCategoryAllowed(aError.category))) {
return false;
}
}
else if (ids && ids[0]) {
// If this is not an nsIScriptError and we need to do window-based
// filtering we skip this message.
return false;
}
return true;
});
},
/**
* Remove the nsIConsoleService listener.
*/
destroy: function CSL_destroy()
{
Services.console.unregisterListener(this);
this.listener = this.window = null;
},
};
///////////////////////////////////////////////////////////////////////////////
// The window.console API observer
///////////////////////////////////////////////////////////////////////////////
/**
* The window.console API observer. This allows the window.console API messages
* to be sent to the remote Web Console instance.
*
* @constructor
* @param nsIDOMWindow aWindow
* Optional - the window object for which we are created. This is used
* for filtering out messages that belong to other windows.
* @param object aOwner
* The owner object must have the following methods:
* - onConsoleAPICall(). This method is invoked with one argument, the
* Console API message that comes from the observer service, whenever
* a relevant console API call is received.
* @param string aConsoleID
* Options - The consoleID that this listener should listen to
*/
function ConsoleAPIListener(aWindow, aOwner, aConsoleID)
{
this.window = aWindow;
this.owner = aOwner;
this.consoleID = aConsoleID;
}
exports.ConsoleAPIListener = ConsoleAPIListener;
ConsoleAPIListener.prototype =
{
// QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
/**
* The content window for which we listen to window.console API calls.
* @type nsIDOMWindow
*/
window: null,
/**
* The owner object which is notified of window.console API calls. It must
* have a onConsoleAPICall method which is invoked with one argument: the
* console API call object that comes from the observer service.
*
* @type object
* @see WebConsoleActor
*/
owner: null,
/**
* The consoleID that we listen for. If not null then only messages from this
* console will be returned.
*/
consoleID: null,
/**
* Initialize the window.console API observer.
*/
init: function CAL_init()
{
// Note that the observer is process-wide. We will filter the messages as
// needed, see CAL_observe().
// Services.obs.addObserver(this, "console-api-log-event", false);
},
/**
* The console API message observer. When messages are received from the
* observer service we forward them to the remote Web Console instance.
*
* @param object aMessage
* The message object receives from the observer service.
* @param string aTopic
* The message topic received from the observer service.
*/
observe: function CAL_observe(aMessage, aTopic)
{
if (!this.owner) {
return;
}
// Here, wrappedJSObject is not a security wrapper but a property defined
// by the XPCOM component which allows us to unwrap the XPCOM interface and
// access the underlying JSObject.
let apiMessage = aMessage.wrappedJSObject;
if (this.window && CONSOLE_WORKER_IDS.indexOf(apiMessage.innerID) == -1) {
let msgWindow = Services.wm.getCurrentInnerWindowWithId(apiMessage.innerID);
if (!msgWindow || !isWindowIncluded(this.window, msgWindow)) {
// Not the same window!
return;
}
}
if (this.consoleID && apiMessage.consoleID != this.consoleID) {
return;
}
this.owner.onConsoleAPICall(apiMessage);
},
/**
* Get the cached messages for the current inner window and its (i)frames.
*
* @param boolean [aIncludePrivate=false]
* Tells if you want to also retrieve messages coming from private
* windows. Defaults to false.
* @return array
* The array of cached messages.
*/
getCachedMessages: function CAL_getCachedMessages(aIncludePrivate = false)
{
let messages = [];
// let ConsoleAPIStorage = Cc["@mozilla.org/consoleAPI-storage;1"]
// .getService(Ci.nsIConsoleAPIStorage);
// // if !this.window, we're in a browser console. Retrieve all events
// // for filtering based on privacy.
// if (!this.window) {
// messages = ConsoleAPIStorage.getEvents();
// } else {
// let ids = WebConsoleUtils.getInnerWindowIDsForFrames(this.window);
// ids.forEach((id) => {
// messages = messages.concat(ConsoleAPIStorage.getEvents(id));
// });
// }
// CONSOLE_WORKER_IDS.forEach((id) => {
// messages = messages.concat(ConsoleAPIStorage.getEvents(id));
// });
if (this.consoleID) {
messages = messages.filter((m) => m.consoleID == this.consoleID);
}
if (aIncludePrivate) {
return messages;
}
return messages.filter((m) => !m.private);
},
/**
* Destroy the console API listener.
*/
destroy: function CAL_destroy()
{
Services.obs.removeObserver(this, "console-api-log-event");
this.window = this.owner = null;
},
};
/**
* WebConsole commands manager.
*
* Defines a set of functions /variables ("commands") that are available from
* the Web Console but not from the web page.
*
*/
var WebConsoleCommands = {
_registeredCommands: new Map(),
_originalCommands: new Map(),
/**
* @private
* Reserved for built-in commands. To register a command from the code of an
* add-on, see WebConsoleCommands.register instead.
*
* @see WebConsoleCommands.register
*/
_registerOriginal: function (name, command) {
this.register(name, command);
this._originalCommands.set(name, this.getCommand(name));
},
/**
* Register a new command.
* @param {string} name The command name (exemple: "$")
* @param {(function|object)} command The command to register.
* It can be a function so the command is a function (like "$()"),
* or it can also be a property descriptor to describe a getter / value (like
* "$0").
*
* The command function or the command getter are passed a owner object as
* their first parameter (see the example below).
*
* Note that setters don't work currently and "enumerable" and "configurable"
* are forced to true.
*
* @example
*
* WebConsoleCommands.register("$", function JSTH_$(aOwner, aSelector)
* {
* return aOwner.window.document.querySelector(aSelector);
* });
*
* WebConsoleCommands.register("$0", {
* get: function(aOwner) {
* return aOwner.makeDebuggeeValue(aOwner.selectedNode);
* }
* });
*/
register: function(name, command) {
this._registeredCommands.set(name, command);
},
/**
* Unregister a command.
*
* If the command being unregister overrode a built-in command,
* the latter is restored.
*
* @param {string} name The name of the command
*/
unregister: function(name) {
this._registeredCommands.delete(name);
if (this._originalCommands.has(name)) {
this.register(name, this._originalCommands.get(name));
}
},
/**
* Returns a command by its name.
*
* @param {string} name The name of the command.
*
* @return {(function|object)} The command.
*/
getCommand: function(name) {
return this._registeredCommands.get(name);
},
/**
* Returns true if a command is registered with the given name.
*
* @param {string} name The name of the command.
*
* @return {boolean} True if the command is registered.
*/
hasCommand: function(name) {
return this._registeredCommands.has(name);
},
};
exports.WebConsoleCommands = WebConsoleCommands;
/*
* Built-in commands.
*
* A list of helper functions used by Firebug can be found here:
* http://getfirebug.com/wiki/index.php/Command_Line_API
*/
/**
* Find a node by ID.
*
* @param string aId
* The ID of the element you want.
* @return nsIDOMNode or null
* The result of calling document.querySelector(aSelector).
*/
WebConsoleCommands._registerOriginal("$", function JSTH_$(aOwner, aSelector)
{
return aOwner.window.document.querySelector(aSelector);
});
/**
* Find the nodes matching a CSS selector.
*
* @param string aSelector
* A string that is passed to window.document.querySelectorAll.
* @return nsIDOMNodeList
* Returns the result of document.querySelectorAll(aSelector).
*/
WebConsoleCommands._registerOriginal("$$", function JSTH_$$(aOwner, aSelector)
{
let nodes = aOwner.window.document.querySelectorAll(aSelector);
// Calling aOwner.window.Array.from() doesn't work without accessing the
// wrappedJSObject, so just loop through the results instead.
let result = new aOwner.window.Array();
for (let i = 0; i < nodes.length; i++) {
result.push(nodes[i]);
}
return result;
});
/**
* Returns the result of the last console input evaluation
*
* @return object|undefined
* Returns last console evaluation or undefined
*/
WebConsoleCommands._registerOriginal("$_", {
get: function(aOwner) {
return aOwner.consoleActor.getLastConsoleInputEvaluation();
}
});
/**
* Runs an xPath query and returns all matched nodes.
*
* @param string aXPath
* xPath search query to execute.
* @param [optional] nsIDOMNode aContext
* Context to run the xPath query on. Uses window.document if not set.
* @return array of nsIDOMNode
*/
WebConsoleCommands._registerOriginal("$x", function JSTH_$x(aOwner, aXPath, aContext)
{
let nodes = new aOwner.window.Array();
// Not waiving Xrays, since we want the original Document.evaluate function,
// instead of anything that's been redefined.
let doc = aOwner.window.document;
aContext = aContext || doc;
let results = doc.evaluate(aXPath, aContext, null,
Ci.nsIDOMXPathResult.ANY_TYPE, null);
let node;
while ((node = results.iterateNext())) {
nodes.push(node);
}
return nodes;
});
/**
* Returns the currently selected object in the highlighter.
*
* @return Object representing the current selection in the
* Inspector, or null if no selection exists.
*/
WebConsoleCommands._registerOriginal("$0", {
get: function(aOwner) {
return aOwner.makeDebuggeeValue(aOwner.selectedNode);
}
});
/**
* Clears the output of the WebConsole.
*/
WebConsoleCommands._registerOriginal("clear", function JSTH_clear(aOwner)
{
aOwner.helperResult = {
type: "clearOutput",
};
});
/**
* Clears the input history of the WebConsole.
*/
WebConsoleCommands._registerOriginal("clearHistory", function JSTH_clearHistory(aOwner)
{
aOwner.helperResult = {
type: "clearHistory",
};
});
/**
* Returns the result of Object.keys(aObject).
*
* @param object aObject
* Object to return the property names from.
* @return array of strings
*/
WebConsoleCommands._registerOriginal("keys", function JSTH_keys(aOwner, aObject)
{
// Need to waive Xrays so we can iterate functions and accessor properties
return Cu.cloneInto(Object.keys(Cu.waiveXrays(aObject)), aOwner.window);
});
/**
* Returns the values of all properties on aObject.
*
* @param object aObject
* Object to display the values from.
* @return array of string
*/
WebConsoleCommands._registerOriginal("values", function JSTH_values(aOwner, aObject)
{
let values = [];
// Need to waive Xrays so we can iterate functions and accessor properties
let waived = Cu.waiveXrays(aObject);
let names = Object.getOwnPropertyNames(waived);
for (let name of names) {
values.push(waived[name]);
}
return Cu.cloneInto(values, aOwner.window);
});
/**
* Opens a help window in MDN.
*/
WebConsoleCommands._registerOriginal("help", function JSTH_help(aOwner)
{
aOwner.helperResult = { type: "help" };
});
/**
* Change the JS evaluation scope.
*
* @param DOMElement|string|window aWindow
* The window object to use for eval scope. This can be a string that
* is used to perform document.querySelector(), to find the iframe that
* you want to cd() to. A DOMElement can be given as well, the
* .contentWindow property is used. Lastly, you can directly pass
* a window object. If you call cd() with no arguments, the current
* eval scope is cleared back to its default (the top window).
*/
WebConsoleCommands._registerOriginal("cd", function JSTH_cd(aOwner, aWindow)
{
if (!aWindow) {
aOwner.consoleActor.evalWindow = null;
aOwner.helperResult = { type: "cd" };
return;
}
if (typeof aWindow == "string") {
aWindow = aOwner.window.document.querySelector(aWindow);
}
if (aWindow instanceof Ci.nsIDOMElement && aWindow.contentWindow) {
aWindow = aWindow.contentWindow;
}
if (!(aWindow instanceof Ci.nsIDOMWindow)) {
aOwner.helperResult = { type: "error", message: "cdFunctionInvalidArgument" };
return;
}
aOwner.consoleActor.evalWindow = aWindow;
aOwner.helperResult = { type: "cd" };
});
/**
* Inspects the passed aObject. This is done by opening the PropertyPanel.
*
* @param object aObject
* Object to inspect.
*/
WebConsoleCommands._registerOriginal("inspect", function JSTH_inspect(aOwner, aObject)
{
let dbgObj = aOwner.makeDebuggeeValue(aObject);
let grip = aOwner.createValueGrip(dbgObj);
aOwner.helperResult = {
type: "inspectObject",
input: aOwner.evalInput,
object: grip,
};
});
/**
* Prints aObject to the output.
*
* @param object aObject
* Object to print to the output.
* @return string
*/
WebConsoleCommands._registerOriginal("pprint", function JSTH_pprint(aOwner, aObject)
{
if (aObject === null || aObject === undefined || aObject === true ||
aObject === false) {
aOwner.helperResult = {
type: "error",
message: "helperFuncUnsupportedTypeError",
};
return null;
}
aOwner.helperResult = { rawOutput: true };
if (typeof aObject == "function") {
return aObject + "\n";
}
let output = [];
let obj = aObject;
for (let name in obj) {
let desc = WebConsoleUtils.getPropertyDescriptor(obj, name) || {};
if (desc.get || desc.set) {
// TODO: Bug 842672 - toolkit/ imports modules from browser/.
let getGrip = VariablesView.getGrip(desc.get);
let setGrip = VariablesView.getGrip(desc.set);
let getString = VariablesView.getString(getGrip);
let setString = VariablesView.getString(setGrip);
output.push(name + ":", " get: " + getString, " set: " + setString);
}
else {
let valueGrip = VariablesView.getGrip(obj[name]);
let valueString = VariablesView.getString(valueGrip);
output.push(name + ": " + valueString);
}
}
return " " + output.join("\n ");
});
/**
* Print the String representation of a value to the output, as-is.
*
* @param any aValue
* A value you want to output as a string.
* @return void
*/
WebConsoleCommands._registerOriginal("print", function JSTH_print(aOwner, aValue)
{
aOwner.helperResult = { rawOutput: true };
if (typeof aValue === "symbol") {
return Symbol.prototype.toString.call(aValue);
}
// Waiving Xrays here allows us to see a closer representation of the
// underlying object. This may execute arbitrary content code, but that
// code will run with content privileges, and the result will be rendered
// inert by coercing it to a String.
return String(Cu.waiveXrays(aValue));
});
/**
* Copy the String representation of a value to the clipboard.
*
* @param any aValue
* A value you want to copy as a string.
* @return void
*/
WebConsoleCommands._registerOriginal("copy", function JSTH_copy(aOwner, aValue)
{
let payload;
try {
if (aValue instanceof Ci.nsIDOMElement) {
payload = aValue.outerHTML;
} else if (typeof aValue == "string") {
payload = aValue;
} else {
payload = JSON.stringify(aValue, null, " ");
}
} catch (ex) {
payload = "/* " + ex + " */";
}
aOwner.helperResult = {
type: "copyValueToClipboard",
value: payload,
};
});
/**
* (Internal only) Add the bindings to |owner.sandbox|.
* This is intended to be used by the WebConsole actor only.
*
* @param object aOwner
* The owning object.
*/
function addWebConsoleCommands(owner) {
if (!owner) {
throw new Error("The owner is required");
}
for (let [name, command] of WebConsoleCommands._registeredCommands) {
if (typeof command === "function") {
owner.sandbox[name] = command.bind(undefined, owner);
}
else if (typeof command === "object") {
// let clone = Object.assign({}, command, {
// // We force the enumerability and the configurability (so the
// // WebConsoleActor can reconfigure the property).
// enumerable: true,
// configurable: true
// });
let clone = {};
for (let attr in command) {
if (command.hasOwnProperty(attr))
clone[attr] = command[attr];
}
clone.enumerable = true;
clone.configurable = true;
if (typeof command.get === "function") {
clone.get = command.get.bind(undefined, owner);
}
if (typeof command.set === "function") {
clone.set = command.set.bind(undefined, owner);
}
Object.defineProperty(owner.sandbox, name, clone);
}
}
}
exports.addWebConsoleCommands = addWebConsoleCommands;
/**
* A ReflowObserver that listens for reflow events from the page.
* Implements nsIReflowObserver.
*
* @constructor
* @param object aWindow
* The window for which we need to track reflow.
* @param object aOwner
* The listener owner which needs to implement:
* - onReflowActivity(aReflowInfo)
*/
function ConsoleReflowListener(aWindow, aListener)
{
this.docshell = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIDocShell);
this.listener = aListener;
this.docshell.addWeakReflowObserver(this);
}
exports.ConsoleReflowListener = ConsoleReflowListener;
ConsoleReflowListener.prototype =
{
// QueryInterface: XPCOMUtils.generateQI([Ci.nsIReflowObserver,
// Ci.nsISupportsWeakReference]),
docshell: null,
listener: null,
/**
* Forward reflow event to listener.
*
* @param DOMHighResTimeStamp aStart
* @param DOMHighResTimeStamp aEnd
* @param boolean aInterruptible
*/
sendReflow: function CRL_sendReflow(aStart, aEnd, aInterruptible)
{
let frame = components.stack.caller.caller;
let filename = frame.filename;
if (filename) {
// Because filename could be of the form "xxx.js -> xxx.js -> xxx.js",
// we only take the last part.
filename = filename.split(" ").pop();
}
this.listener.onReflowActivity({
interruptible: aInterruptible,
start: aStart,
end: aEnd,
sourceURL: filename,
sourceLine: frame.lineNumber,
functionName: frame.name
});
},
/**
* On uninterruptible reflow
*
* @param DOMHighResTimeStamp aStart
* @param DOMHighResTimeStamp aEnd
*/
reflow: function CRL_reflow(aStart, aEnd)
{
this.sendReflow(aStart, aEnd, false);
},
/**
* On interruptible reflow
*
* @param DOMHighResTimeStamp aStart
* @param DOMHighResTimeStamp aEnd
*/
reflowInterruptible: function CRL_reflowInterruptible(aStart, aEnd)
{
this.sendReflow(aStart, aEnd, true);
},
/**
* Unregister listener.
*/
destroy: function CRL_destroy()
{
this.docshell.removeWeakReflowObserver(this);
this.listener = this.docshell = null;
},
};
function gSequenceId()
{
return gSequenceId.n++;
}
gSequenceId.n = 0;
exports;