2246 lines
65 KiB
JavaScript
2246 lines
65 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2; js-indent-level: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { Cu, Ci } = require("chrome");
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const { GeneratedLocation } = require("devtools/server/actors/common");
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const { DebuggerServer } = require("devtools/server/main");
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const DevToolsUtils = require("devtools/shared/DevToolsUtils");
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const { assert, dumpn } = DevToolsUtils;
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loader.lazyRequireGetter(this, "ThreadSafeChromeUtils");
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const TYPED_ARRAY_CLASSES = ["Uint8Array", "Uint8ClampedArray", "Uint16Array",
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"Uint32Array", "Int8Array", "Int16Array", "Int32Array", "Float32Array",
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"Float64Array"];
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// Number of items to preview in objects, arrays, maps, sets, lists,
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// collections, etc.
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const OBJECT_PREVIEW_MAX_ITEMS = 10;
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/**
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* Creates an actor for the specified object.
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*
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* @param obj Debugger.Object
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* The debuggee object.
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* @param hooks Object
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* A collection of abstract methods that are implemented by the caller.
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* ObjectActor requires the following functions to be implemented by
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* the caller:
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* - createValueGrip
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* Creates a value grip for the given object
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* - sources
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* TabSources getter that manages the sources of a thread
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* - createEnvironmentActor
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* Creates and return an environment actor
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* - getGripDepth
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* An actor's grip depth getter
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* - incrementGripDepth
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* Increment the actor's grip depth
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* - decrementGripDepth
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* Decrement the actor's grip depth
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* - globalDebugObject
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* The Debuggee Global Object as given by the ThreadActor
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*/
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function ObjectActor(obj, {
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createValueGrip,
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sources,
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createEnvironmentActor,
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getGripDepth,
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incrementGripDepth,
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decrementGripDepth,
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getGlobalDebugObject
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}) {
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assert(!obj.optimizedOut,
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"Should not create object actors for optimized out values!");
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this.obj = obj;
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this.hooks = {
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createValueGrip,
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sources,
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createEnvironmentActor,
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getGripDepth,
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incrementGripDepth,
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decrementGripDepth,
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getGlobalDebugObject
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};
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this.iterators = new Set();
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}
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ObjectActor.prototype = {
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actorPrefix: "obj",
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/**
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* Returns a grip for this actor for returning in a protocol message.
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*/
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grip: function () {
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this.hooks.incrementGripDepth();
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let g = {
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"type": "object",
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"actor": this.actorID
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};
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// If it's a proxy, lie and tell that it belongs to an invented
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// "Proxy" class, and avoid calling the [[IsExtensible]] trap
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if(this.obj.isProxy) {
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g.class = "Proxy";
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g.proxyTarget = this.hooks.createValueGrip(this.obj.proxyTarget);
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g.proxyHandler = this.hooks.createValueGrip(this.obj.proxyHandler);
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} else {
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g.class = this.obj.class;
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g.extensible = this.obj.isExtensible();
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g.frozen = this.obj.isFrozen();
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g.sealed = this.obj.isSealed();
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}
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if (g.class != "DeadObject") {
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if (g.class == "Promise") {
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g.promiseState = this._createPromiseState();
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}
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// FF40+: Allow to know how many properties an object has
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// to lazily display them when there is a bunch.
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// Throws on some MouseEvent object in tests.
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try {
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// Bug 1163520: Assert on internal functions
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if (!["Function", "Proxy"].includes(g.class)) {
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g.ownPropertyLength = this.obj.getOwnPropertyNames().length;
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}
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} catch (e) {}
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let raw = this.obj.unsafeDereference();
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// If Cu is not defined, we are running on a worker thread, where xrays
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// don't exist.
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if (Cu) {
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raw = Cu.unwaiveXrays(raw);
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}
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if (!DevToolsUtils.isSafeJSObject(raw)) {
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raw = null;
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}
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let previewers = DebuggerServer.ObjectActorPreviewers[g.class] ||
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DebuggerServer.ObjectActorPreviewers.Object;
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for (let fn of previewers) {
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try {
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if (fn(this, g, raw)) {
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break;
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}
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} catch (e) {
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let msg = "ObjectActor.prototype.grip previewer function";
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DevToolsUtils.reportException(msg, e);
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}
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}
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}
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this.hooks.decrementGripDepth();
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return g;
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},
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/**
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* Returns an object exposing the internal Promise state.
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*/
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_createPromiseState: function () {
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const { state, value, reason } = getPromiseState(this.obj);
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let promiseState = { state };
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if (state == "fulfilled") {
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promiseState.value = this.hooks.createValueGrip(value);
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} else if (state == "rejected") {
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promiseState.reason = this.hooks.createValueGrip(reason);
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}
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promiseState.creationTimestamp = Date.now() - this.obj.promiseLifetime;
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// Only add the timeToSettle property if the Promise isn't pending.
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if (state !== "pending") {
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promiseState.timeToSettle = this.obj.promiseTimeToResolution;
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}
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return promiseState;
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},
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/**
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* Releases this actor from the pool.
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*/
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release: function () {
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if (this.registeredPool.objectActors) {
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this.registeredPool.objectActors.delete(this.obj);
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}
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this.iterators.forEach(actor => this.registeredPool.removeActor(actor));
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this.iterators.clear();
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this.registeredPool.removeActor(this);
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},
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/**
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* Handle a protocol request to provide the definition site of this function
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* object.
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*/
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onDefinitionSite: function () {
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if (this.obj.class != "Function") {
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return {
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from: this.actorID,
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error: "objectNotFunction",
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message: this.actorID + " is not a function."
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};
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}
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if (!this.obj.script) {
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return {
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from: this.actorID,
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error: "noScript",
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message: this.actorID + " has no Debugger.Script"
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};
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}
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return this.hooks.sources().getOriginalLocation(new GeneratedLocation(
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this.hooks.sources().createNonSourceMappedActor(this.obj.script.source),
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this.obj.script.startLine,
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0 // TODO bug 901138: use Debugger.Script.prototype.startColumn
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)).then((originalLocation) => {
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return {
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source: originalLocation.originalSourceActor.form(),
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line: originalLocation.originalLine,
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column: originalLocation.originalColumn
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};
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});
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},
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/**
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* Handle a protocol request to provide the names of the properties defined on
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* the object and not its prototype.
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*/
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onOwnPropertyNames: function () {
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return { from: this.actorID,
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ownPropertyNames: this.obj.getOwnPropertyNames() };
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},
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/**
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* Creates an actor to iterate over an object property names and values.
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* See PropertyIteratorActor constructor for more info about options param.
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*
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* @param request object
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* The protocol request object.
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*/
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onEnumProperties: function (request) {
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let actor = new PropertyIteratorActor(this, request.options);
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this.registeredPool.addActor(actor);
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this.iterators.add(actor);
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return { iterator: actor.grip() };
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},
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/**
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* Creates an actor to iterate over entries of a Map/Set-like object.
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*/
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onEnumEntries: function () {
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let actor = new PropertyIteratorActor(this, { enumEntries: true });
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this.registeredPool.addActor(actor);
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this.iterators.add(actor);
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return { iterator: actor.grip() };
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},
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/**
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* Handle a protocol request to provide the prototype and own properties of
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* the object.
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*/
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onPrototypeAndProperties: function () {
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let ownProperties = Object.create(null);
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let names;
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try {
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names = this.obj.getOwnPropertyNames();
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} catch (ex) {
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// The above can throw if this.obj points to a dead object.
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// TODO: we should use Cu.isDeadWrapper() - see bug 885800.
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return { from: this.actorID,
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prototype: this.hooks.createValueGrip(null),
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ownProperties: ownProperties,
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safeGetterValues: Object.create(null) };
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}
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for (let name of names) {
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ownProperties[name] = this._propertyDescriptor(name);
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}
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return { from: this.actorID,
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prototype: this.hooks.createValueGrip(this.obj.proto),
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ownProperties: ownProperties,
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safeGetterValues: this._findSafeGetterValues(names) };
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},
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/**
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* Find the safe getter values for the current Debugger.Object, |this.obj|.
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*
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* @private
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* @param array ownProperties
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* The array that holds the list of known ownProperties names for
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* |this.obj|.
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* @param number [limit=0]
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* Optional limit of getter values to find.
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* @return object
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* An object that maps property names to safe getter descriptors as
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* defined by the remote debugging protocol.
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*/
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_findSafeGetterValues: function (ownProperties, limit = 0) {
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let safeGetterValues = Object.create(null);
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let obj = this.obj;
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let level = 0, i = 0;
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// Most objects don't have any safe getters but inherit some from their
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// prototype. Avoid calling getOwnPropertyNames on objects that may have
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// many properties like Array, strings or js objects. That to avoid
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// freezing firefox when doing so.
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if (TYPED_ARRAY_CLASSES.includes(this.obj.class) ||
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["Array", "Object", "String"].includes(this.obj.class)) {
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obj = obj.proto;
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level++;
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}
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while (obj) {
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let getters = this._findSafeGetters(obj);
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for (let name of getters) {
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// Avoid overwriting properties from prototypes closer to this.obj. Also
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// avoid providing safeGetterValues from prototypes if property |name|
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// is already defined as an own property.
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if (name in safeGetterValues ||
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(obj != this.obj && ownProperties.indexOf(name) !== -1)) {
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continue;
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}
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// Ignore __proto__ on Object.prototye.
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if (!obj.proto && name == "__proto__") {
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continue;
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}
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let desc = null, getter = null;
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try {
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desc = obj.getOwnPropertyDescriptor(name);
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getter = desc.get;
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} catch (ex) {
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// The above can throw if the cache becomes stale.
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}
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if (!getter) {
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obj._safeGetters = null;
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continue;
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}
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let result = getter.call(this.obj);
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if (result && !("throw" in result)) {
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let getterValue = undefined;
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if ("return" in result) {
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getterValue = result.return;
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} else if ("yield" in result) {
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getterValue = result.yield;
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}
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// WebIDL attributes specified with the LenientThis extended attribute
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// return undefined and should be ignored.
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if (getterValue !== undefined) {
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safeGetterValues[name] = {
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getterValue: this.hooks.createValueGrip(getterValue),
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getterPrototypeLevel: level,
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enumerable: desc.enumerable,
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writable: level == 0 ? desc.writable : true,
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};
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if (limit && ++i == limit) {
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break;
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}
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}
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}
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}
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if (limit && i == limit) {
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break;
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}
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obj = obj.proto;
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level++;
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}
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return safeGetterValues;
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},
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/**
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* Find the safe getters for a given Debugger.Object. Safe getters are native
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* getters which are safe to execute.
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*
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* @private
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* @param Debugger.Object object
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* The Debugger.Object where you want to find safe getters.
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* @return Set
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* A Set of names of safe getters. This result is cached for each
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* Debugger.Object.
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*/
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_findSafeGetters: function (object) {
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if (object._safeGetters) {
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return object._safeGetters;
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}
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let getters = new Set();
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let names = [];
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try {
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names = object.getOwnPropertyNames();
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} catch (ex) {
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// Calling getOwnPropertyNames() on some wrapped native prototypes is not
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// allowed: "cannot modify properties of a WrappedNative". See bug 952093.
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}
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for (let name of names) {
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let desc = null;
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try {
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desc = object.getOwnPropertyDescriptor(name);
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} catch (e) {
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// Calling getOwnPropertyDescriptor on wrapped native prototypes is not
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// allowed (bug 560072).
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}
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if (!desc || desc.value !== undefined || !("get" in desc)) {
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continue;
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}
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if (DevToolsUtils.hasSafeGetter(desc)) {
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getters.add(name);
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}
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}
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object._safeGetters = getters;
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return getters;
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},
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/**
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* Handle a protocol request to provide the prototype of the object.
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*/
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onPrototype: function () {
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return { from: this.actorID,
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prototype: this.hooks.createValueGrip(this.obj.proto) };
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},
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/**
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* Handle a protocol request to provide the property descriptor of the
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* object's specified property.
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*
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* @param request object
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* The protocol request object.
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*/
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onProperty: function (request) {
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if (!request.name) {
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return { error: "missingParameter",
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message: "no property name was specified" };
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}
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return { from: this.actorID,
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descriptor: this._propertyDescriptor(request.name) };
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},
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/**
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* Handle a protocol request to provide the display string for the object.
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*/
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onDisplayString: function () {
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const string = stringify(this.obj);
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return { from: this.actorID,
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displayString: this.hooks.createValueGrip(string) };
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},
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/**
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* A helper method that creates a property descriptor for the provided object,
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* properly formatted for sending in a protocol response.
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*
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* @private
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* @param string name
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* The property that the descriptor is generated for.
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* @param boolean [onlyEnumerable]
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* Optional: true if you want a descriptor only for an enumerable
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* property, false otherwise.
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* @return object|undefined
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* The property descriptor, or undefined if this is not an enumerable
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* property and onlyEnumerable=true.
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*/
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_propertyDescriptor: function (name, onlyEnumerable) {
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let desc;
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try {
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desc = this.obj.getOwnPropertyDescriptor(name);
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} catch (e) {
|
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// Calling getOwnPropertyDescriptor on wrapped native prototypes is not
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// allowed (bug 560072). Inform the user with a bogus, but hopefully
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// explanatory, descriptor.
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return {
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configurable: false,
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writable: false,
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enumerable: false,
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value: e.name
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};
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}
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|
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if (!desc || onlyEnumerable && !desc.enumerable) {
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return undefined;
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}
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|
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let retval = {
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configurable: desc.configurable,
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enumerable: desc.enumerable
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};
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if ("value" in desc) {
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retval.writable = desc.writable;
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retval.value = this.hooks.createValueGrip(desc.value);
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} else {
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if ("get" in desc) {
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retval.get = this.hooks.createValueGrip(desc.get);
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}
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if ("set" in desc) {
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retval.set = this.hooks.createValueGrip(desc.set);
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}
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}
|
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return retval;
|
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},
|
|
|
|
/**
|
|
* Handle a protocol request to provide the source code of a function.
|
|
*
|
|
* @param request object
|
|
* The protocol request object.
|
|
*/
|
|
onDecompile: function (request) {
|
|
if (this.obj.class !== "Function") {
|
|
return { error: "objectNotFunction",
|
|
message: "decompile request is only valid for object grips " +
|
|
"with a 'Function' class." };
|
|
}
|
|
|
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return { from: this.actorID,
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decompiledCode: this.obj.decompile(!!request.pretty) };
|
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},
|
|
|
|
/**
|
|
* Handle a protocol request to provide the parameters of a function.
|
|
*/
|
|
onParameterNames: function () {
|
|
if (this.obj.class !== "Function") {
|
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return { error: "objectNotFunction",
|
|
message: "'parameterNames' request is only valid for object " +
|
|
"grips with a 'Function' class." };
|
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}
|
|
|
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return { parameterNames: this.obj.parameterNames };
|
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},
|
|
|
|
/**
|
|
* Handle a protocol request to release a thread-lifetime grip.
|
|
*/
|
|
onRelease: function () {
|
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this.release();
|
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return {};
|
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},
|
|
|
|
/**
|
|
* Handle a protocol request to provide the lexical scope of a function.
|
|
*/
|
|
onScope: function () {
|
|
if (this.obj.class !== "Function") {
|
|
return { error: "objectNotFunction",
|
|
message: "scope request is only valid for object grips with a" +
|
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" 'Function' class." };
|
|
}
|
|
|
|
let envActor = this.hooks.createEnvironmentActor(this.obj.environment,
|
|
this.registeredPool);
|
|
if (!envActor) {
|
|
return { error: "notDebuggee",
|
|
message: "cannot access the environment of this function." };
|
|
}
|
|
|
|
return { from: this.actorID, scope: envActor.form() };
|
|
},
|
|
|
|
/**
|
|
* Handle a protocol request to get the list of dependent promises of a
|
|
* promise.
|
|
*
|
|
* @return object
|
|
* Returns an object containing an array of object grips of the
|
|
* dependent promises
|
|
*/
|
|
onDependentPromises: function () {
|
|
if (this.obj.class != "Promise") {
|
|
return { error: "objectNotPromise",
|
|
message: "'dependentPromises' request is only valid for " +
|
|
"object grips with a 'Promise' class." };
|
|
}
|
|
|
|
let promises = this.obj.promiseDependentPromises.map(p => this.hooks.createValueGrip(p));
|
|
|
|
return { promises };
|
|
},
|
|
|
|
/**
|
|
* Handle a protocol request to get the allocation stack of a promise.
|
|
*/
|
|
onAllocationStack: function () {
|
|
if (this.obj.class != "Promise") {
|
|
return { error: "objectNotPromise",
|
|
message: "'allocationStack' request is only valid for " +
|
|
"object grips with a 'Promise' class." };
|
|
}
|
|
|
|
let stack = this.obj.promiseAllocationSite;
|
|
let allocationStacks = [];
|
|
|
|
while (stack) {
|
|
if (stack.source) {
|
|
let source = this._getSourceOriginalLocation(stack);
|
|
|
|
if (source) {
|
|
allocationStacks.push(source);
|
|
}
|
|
}
|
|
stack = stack.parent;
|
|
}
|
|
|
|
return Promise.all(allocationStacks).then(stacks => {
|
|
return { allocationStack: stacks };
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Handle a protocol request to get the fulfillment stack of a promise.
|
|
*/
|
|
onFulfillmentStack: function () {
|
|
if (this.obj.class != "Promise") {
|
|
return { error: "objectNotPromise",
|
|
message: "'fulfillmentStack' request is only valid for " +
|
|
"object grips with a 'Promise' class." };
|
|
}
|
|
|
|
let stack = this.obj.promiseResolutionSite;
|
|
let fulfillmentStacks = [];
|
|
|
|
while (stack) {
|
|
if (stack.source) {
|
|
let source = this._getSourceOriginalLocation(stack);
|
|
|
|
if (source) {
|
|
fulfillmentStacks.push(source);
|
|
}
|
|
}
|
|
stack = stack.parent;
|
|
}
|
|
|
|
return Promise.all(fulfillmentStacks).then(stacks => {
|
|
return { fulfillmentStack: stacks };
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Handle a protocol request to get the rejection stack of a promise.
|
|
*/
|
|
onRejectionStack: function () {
|
|
if (this.obj.class != "Promise") {
|
|
return { error: "objectNotPromise",
|
|
message: "'rejectionStack' request is only valid for " +
|
|
"object grips with a 'Promise' class." };
|
|
}
|
|
|
|
let stack = this.obj.promiseResolutionSite;
|
|
let rejectionStacks = [];
|
|
|
|
while (stack) {
|
|
if (stack.source) {
|
|
let source = this._getSourceOriginalLocation(stack);
|
|
|
|
if (source) {
|
|
rejectionStacks.push(source);
|
|
}
|
|
}
|
|
stack = stack.parent;
|
|
}
|
|
|
|
return Promise.all(rejectionStacks).then(stacks => {
|
|
return { rejectionStack: stacks };
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Helper function for fetching the source location of a SavedFrame stack.
|
|
*
|
|
* @param SavedFrame stack
|
|
* The promise allocation stack frame
|
|
* @return object
|
|
* Returns an object containing the source location of the SavedFrame
|
|
* stack.
|
|
*/
|
|
_getSourceOriginalLocation: function (stack) {
|
|
let source;
|
|
|
|
// Catch any errors if the source actor cannot be found
|
|
try {
|
|
source = this.hooks.sources().getSourceActorByURL(stack.source);
|
|
} catch (e) {}
|
|
|
|
if (!source) {
|
|
return null;
|
|
}
|
|
|
|
return this.hooks.sources().getOriginalLocation(new GeneratedLocation(
|
|
source,
|
|
stack.line,
|
|
stack.column
|
|
)).then((originalLocation) => {
|
|
return {
|
|
source: originalLocation.originalSourceActor.form(),
|
|
line: originalLocation.originalLine,
|
|
column: originalLocation.originalColumn,
|
|
functionDisplayName: stack.functionDisplayName
|
|
};
|
|
});
|
|
}
|
|
};
|
|
|
|
ObjectActor.prototype.requestTypes = {
|
|
"definitionSite": ObjectActor.prototype.onDefinitionSite,
|
|
"parameterNames": ObjectActor.prototype.onParameterNames,
|
|
"prototypeAndProperties": ObjectActor.prototype.onPrototypeAndProperties,
|
|
"enumProperties": ObjectActor.prototype.onEnumProperties,
|
|
"prototype": ObjectActor.prototype.onPrototype,
|
|
"property": ObjectActor.prototype.onProperty,
|
|
"displayString": ObjectActor.prototype.onDisplayString,
|
|
"ownPropertyNames": ObjectActor.prototype.onOwnPropertyNames,
|
|
"decompile": ObjectActor.prototype.onDecompile,
|
|
"release": ObjectActor.prototype.onRelease,
|
|
"scope": ObjectActor.prototype.onScope,
|
|
"dependentPromises": ObjectActor.prototype.onDependentPromises,
|
|
"allocationStack": ObjectActor.prototype.onAllocationStack,
|
|
"fulfillmentStack": ObjectActor.prototype.onFulfillmentStack,
|
|
"rejectionStack": ObjectActor.prototype.onRejectionStack,
|
|
"enumEntries": ObjectActor.prototype.onEnumEntries,
|
|
};
|
|
|
|
/**
|
|
* Creates an actor to iterate over an object's property names and values.
|
|
*
|
|
* @param objectActor ObjectActor
|
|
* The object actor.
|
|
* @param options Object
|
|
* A dictionary object with various boolean attributes:
|
|
* - enumEntries Boolean
|
|
* If true, enumerates the entries of a Map or Set object
|
|
* instead of enumerating properties.
|
|
* - ignoreIndexedProperties Boolean
|
|
* If true, filters out Array items.
|
|
* e.g. properties names between `0` and `object.length`.
|
|
* - ignoreNonIndexedProperties Boolean
|
|
* If true, filters out items that aren't array items
|
|
* e.g. properties names that are not a number between `0`
|
|
* and `object.length`.
|
|
* - sort Boolean
|
|
* If true, the iterator will sort the properties by name
|
|
* before dispatching them.
|
|
* - query String
|
|
* If non-empty, will filter the properties by names and values
|
|
* containing this query string. The match is not case-sensitive.
|
|
* Regarding value filtering it just compare to the stringification
|
|
* of the property value.
|
|
*/
|
|
function PropertyIteratorActor(objectActor, options) {
|
|
if (options.enumEntries) {
|
|
let cls = objectActor.obj.class;
|
|
if (cls == "Map") {
|
|
this.iterator = enumMapEntries(objectActor);
|
|
} else if (cls == "WeakMap") {
|
|
this.iterator = enumWeakMapEntries(objectActor);
|
|
} else if (cls == "Set") {
|
|
this.iterator = enumSetEntries(objectActor);
|
|
} else if (cls == "WeakSet") {
|
|
this.iterator = enumWeakSetEntries(objectActor);
|
|
} else {
|
|
throw new Error("Unsupported class to enumerate entries from: " + cls);
|
|
}
|
|
} else if (options.ignoreNonIndexedProperties && !options.query) {
|
|
this.iterator = enumArrayProperties(objectActor, options);
|
|
} else {
|
|
this.iterator = enumObjectProperties(objectActor, options);
|
|
}
|
|
}
|
|
|
|
PropertyIteratorActor.prototype = {
|
|
actorPrefix: "propertyIterator",
|
|
|
|
grip() {
|
|
return {
|
|
type: this.actorPrefix,
|
|
actor: this.actorID,
|
|
count: this.iterator.size
|
|
};
|
|
},
|
|
|
|
names({ indexes }) {
|
|
let list = [];
|
|
for (let idx of indexes) {
|
|
list.push(this.iterator.propertyName(idx));
|
|
}
|
|
return {
|
|
names: indexes
|
|
};
|
|
},
|
|
|
|
slice({ start, count }) {
|
|
let ownProperties = Object.create(null);
|
|
for (let i = start, m = start + count; i < m; i++) {
|
|
let name = this.iterator.propertyName(i);
|
|
ownProperties[name] = this.iterator.propertyDescription(i);
|
|
}
|
|
return {
|
|
ownProperties
|
|
};
|
|
},
|
|
|
|
all() {
|
|
return this.slice({ start: 0, count: this.length });
|
|
}
|
|
};
|
|
|
|
PropertyIteratorActor.prototype.requestTypes = {
|
|
"names": PropertyIteratorActor.prototype.names,
|
|
"slice": PropertyIteratorActor.prototype.slice,
|
|
"all": PropertyIteratorActor.prototype.all,
|
|
};
|
|
|
|
function enumArrayProperties(objectActor, options) {
|
|
let length = DevToolsUtils.getProperty(objectActor.obj, "length");
|
|
if (typeof length !== "number") {
|
|
// Pseudo arrays are flagged as ArrayLike if they have
|
|
// subsequent indexed properties without having any length attribute.
|
|
length = 0;
|
|
let names = objectActor.obj.getOwnPropertyNames();
|
|
for (let key of names) {
|
|
if (isNaN(key) || key != length++) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return {
|
|
size: length,
|
|
propertyName(index) {
|
|
return index;
|
|
},
|
|
propertyDescription(index) {
|
|
return objectActor._propertyDescriptor(index);
|
|
}
|
|
};
|
|
}
|
|
|
|
function enumObjectProperties(objectActor, options) {
|
|
let names = [];
|
|
try {
|
|
names = objectActor.obj.getOwnPropertyNames();
|
|
} catch (ex) {
|
|
// Calling getOwnPropertyNames() on some wrapped native prototypes is not
|
|
// allowed: "cannot modify properties of a WrappedNative". See bug 952093.
|
|
}
|
|
|
|
if (options.ignoreNonIndexedProperties || options.ignoreIndexedProperties) {
|
|
let length = DevToolsUtils.getProperty(objectActor.obj, "length");
|
|
if (typeof length !== "number") {
|
|
// Pseudo arrays are flagged as ArrayLike if they have
|
|
// subsequent indexed properties without having any length attribute.
|
|
length = 0;
|
|
for (let key of names) {
|
|
if (isNaN(key) || key != length++) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// It appears that getOwnPropertyNames always returns indexed properties
|
|
// first, so we can safely slice `names` for/against indexed properties.
|
|
// We do such clever operation to optimize very large array inspection,
|
|
// like webaudio buffers.
|
|
if (options.ignoreIndexedProperties) {
|
|
// Keep items after `length` index
|
|
names = names.slice(length);
|
|
} else if (options.ignoreNonIndexedProperties) {
|
|
// Remove `length` first items
|
|
names.splice(length);
|
|
}
|
|
}
|
|
|
|
let safeGetterValues = objectActor._findSafeGetterValues(names, 0);
|
|
let safeGetterNames = Object.keys(safeGetterValues);
|
|
// Merge the safe getter values into the existing properties list.
|
|
for (let name of safeGetterNames) {
|
|
if (!names.includes(name)) {
|
|
names.push(name);
|
|
}
|
|
}
|
|
|
|
if (options.query) {
|
|
let { query } = options;
|
|
query = query.toLowerCase();
|
|
names = names.filter(name => {
|
|
// Filter on attribute names
|
|
if (name.toLowerCase().includes(query)) {
|
|
return true;
|
|
}
|
|
// and then on attribute values
|
|
let desc;
|
|
try {
|
|
desc = objectActor.obj.getOwnPropertyDescriptor(name);
|
|
} catch (e) {
|
|
// Calling getOwnPropertyDescriptor on wrapped native prototypes is not
|
|
// allowed (bug 560072).
|
|
}
|
|
if (desc && desc.value &&
|
|
String(desc.value).includes(query)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
}
|
|
|
|
if (options.sort) {
|
|
names.sort();
|
|
}
|
|
|
|
return {
|
|
size: names.length,
|
|
propertyName(index) {
|
|
return names[index];
|
|
},
|
|
propertyDescription(index) {
|
|
let name = names[index];
|
|
let desc = objectActor._propertyDescriptor(name);
|
|
if (!desc) {
|
|
desc = safeGetterValues[name];
|
|
} else if (name in safeGetterValues) {
|
|
// Merge the safe getter values into the existing properties list.
|
|
let { getterValue, getterPrototypeLevel } = safeGetterValues[name];
|
|
desc.getterValue = getterValue;
|
|
desc.getterPrototypeLevel = getterPrototypeLevel;
|
|
}
|
|
return desc;
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Helper function to create a grip from a Map/Set entry
|
|
*/
|
|
function gripFromEntry({ obj, hooks }, entry) {
|
|
return hooks.createValueGrip(
|
|
makeDebuggeeValueIfNeeded(obj, Cu.unwaiveXrays(entry)));
|
|
}
|
|
|
|
function enumMapEntries(objectActor) {
|
|
// Iterating over a Map via .entries goes through various intermediate
|
|
// objects - an Iterator object, then a 2-element Array object, then the
|
|
// actual values we care about. We don't have Xrays to Iterator objects,
|
|
// so we get Opaque wrappers for them. And even though we have Xrays to
|
|
// Arrays, the semantics often deny access to the entires based on the
|
|
// nature of the values. So we need waive Xrays for the iterator object
|
|
// and the tupes, and then re-apply them on the underlying values until
|
|
// we fix bug 1023984.
|
|
//
|
|
// Even then though, we might want to continue waiving Xrays here for the
|
|
// same reason we do so for Arrays above - this filtering behavior is likely
|
|
// to be more confusing than beneficial in the case of Object previews.
|
|
let raw = objectActor.obj.unsafeDereference();
|
|
|
|
let keys = [...Cu.waiveXrays(Map.prototype.keys.call(raw))];
|
|
return {
|
|
[Symbol.iterator]: function* () {
|
|
for (let key of keys) {
|
|
let value = Map.prototype.get.call(raw, key);
|
|
yield [ key, value ].map(val => gripFromEntry(objectActor, val));
|
|
}
|
|
},
|
|
size: keys.length,
|
|
propertyName(index) {
|
|
return index;
|
|
},
|
|
propertyDescription(index) {
|
|
let key = keys[index];
|
|
let val = Map.prototype.get.call(raw, key);
|
|
return {
|
|
enumerable: true,
|
|
value: {
|
|
type: "mapEntry",
|
|
preview: {
|
|
key: gripFromEntry(objectActor, key),
|
|
value: gripFromEntry(objectActor, val)
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|
|
}
|
|
|
|
function enumWeakMapEntries(objectActor) {
|
|
// We currently lack XrayWrappers for WeakMap, so when we iterate over
|
|
// the values, the temporary iterator objects get created in the target
|
|
// compartment. However, we _do_ have Xrays to Object now, so we end up
|
|
// Xraying those temporary objects, and filtering access to |it.value|
|
|
// based on whether or not it's Xrayable and/or callable, which breaks
|
|
// the for/of iteration.
|
|
//
|
|
// This code is designed to handle untrusted objects, so we can safely
|
|
// waive Xrays on the iterable, and relying on the Debugger machinery to
|
|
// make sure we handle the resulting objects carefully.
|
|
let raw = objectActor.obj.unsafeDereference();
|
|
let keys = Cu.waiveXrays(
|
|
ThreadSafeChromeUtils.nondeterministicGetWeakMapKeys(raw));
|
|
|
|
return {
|
|
[Symbol.iterator]: function* () {
|
|
for (let key of keys) {
|
|
let value = WeakMap.prototype.get.call(raw, key);
|
|
yield [ key, value ].map(val => gripFromEntry(objectActor, val));
|
|
}
|
|
},
|
|
size: keys.length,
|
|
propertyName(index) {
|
|
return index;
|
|
},
|
|
propertyDescription(index) {
|
|
let key = keys[index];
|
|
let val = WeakMap.prototype.get.call(raw, key);
|
|
return {
|
|
enumerable: true,
|
|
value: {
|
|
type: "mapEntry",
|
|
preview: {
|
|
key: gripFromEntry(objectActor, key),
|
|
value: gripFromEntry(objectActor, val)
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|
|
}
|
|
|
|
function enumSetEntries(objectActor) {
|
|
// We currently lack XrayWrappers for Set, so when we iterate over
|
|
// the values, the temporary iterator objects get created in the target
|
|
// compartment. However, we _do_ have Xrays to Object now, so we end up
|
|
// Xraying those temporary objects, and filtering access to |it.value|
|
|
// based on whether or not it's Xrayable and/or callable, which breaks
|
|
// the for/of iteration.
|
|
//
|
|
// This code is designed to handle untrusted objects, so we can safely
|
|
// waive Xrays on the iterable, and relying on the Debugger machinery to
|
|
// make sure we handle the resulting objects carefully.
|
|
let raw = objectActor.obj.unsafeDereference();
|
|
let values = [...Cu.waiveXrays(Set.prototype.values.call(raw))];
|
|
|
|
return {
|
|
[Symbol.iterator]: function* () {
|
|
for (let item of values) {
|
|
yield gripFromEntry(objectActor, item);
|
|
}
|
|
},
|
|
size: values.length,
|
|
propertyName(index) {
|
|
return index;
|
|
},
|
|
propertyDescription(index) {
|
|
let val = values[index];
|
|
return {
|
|
enumerable: true,
|
|
value: gripFromEntry(objectActor, val)
|
|
};
|
|
}
|
|
};
|
|
}
|
|
|
|
function enumWeakSetEntries(objectActor) {
|
|
// We currently lack XrayWrappers for WeakSet, so when we iterate over
|
|
// the values, the temporary iterator objects get created in the target
|
|
// compartment. However, we _do_ have Xrays to Object now, so we end up
|
|
// Xraying those temporary objects, and filtering access to |it.value|
|
|
// based on whether or not it's Xrayable and/or callable, which breaks
|
|
// the for/of iteration.
|
|
//
|
|
// This code is designed to handle untrusted objects, so we can safely
|
|
// waive Xrays on the iterable, and relying on the Debugger machinery to
|
|
// make sure we handle the resulting objects carefully.
|
|
let raw = objectActor.obj.unsafeDereference();
|
|
let keys = Cu.waiveXrays(
|
|
ThreadSafeChromeUtils.nondeterministicGetWeakSetKeys(raw));
|
|
|
|
return {
|
|
[Symbol.iterator]: function* () {
|
|
for (let item of keys) {
|
|
yield gripFromEntry(objectActor, item);
|
|
}
|
|
},
|
|
size: keys.length,
|
|
propertyName(index) {
|
|
return index;
|
|
},
|
|
propertyDescription(index) {
|
|
let val = keys[index];
|
|
return {
|
|
enumerable: true,
|
|
value: gripFromEntry(objectActor, val)
|
|
};
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Functions for adding information to ObjectActor grips for the purpose of
|
|
* having customized output. This object holds arrays mapped by
|
|
* Debugger.Object.prototype.class.
|
|
*
|
|
* In each array you can add functions that take three
|
|
* arguments:
|
|
* - the ObjectActor instance and its hooks to make a preview for,
|
|
* - the grip object being prepared for the client,
|
|
* - the raw JS object after calling Debugger.Object.unsafeDereference(). This
|
|
* argument is only provided if the object is safe for reading properties and
|
|
* executing methods. See DevToolsUtils.isSafeJSObject().
|
|
*
|
|
* Functions must return false if they cannot provide preview
|
|
* information for the debugger object, or true otherwise.
|
|
*/
|
|
DebuggerServer.ObjectActorPreviewers = {
|
|
String: [function (objectActor, grip, rawObj) {
|
|
return wrappedPrimitivePreviewer("String", String, objectActor, grip, rawObj);
|
|
}],
|
|
|
|
Boolean: [function (objectActor, grip, rawObj) {
|
|
return wrappedPrimitivePreviewer("Boolean", Boolean, objectActor, grip, rawObj);
|
|
}],
|
|
|
|
Number: [function (objectActor, grip, rawObj) {
|
|
return wrappedPrimitivePreviewer("Number", Number, objectActor, grip, rawObj);
|
|
}],
|
|
|
|
Function: [function ({obj, hooks}, grip) {
|
|
if (obj.name) {
|
|
grip.name = obj.name;
|
|
}
|
|
|
|
if (obj.displayName) {
|
|
grip.displayName = obj.displayName.substr(0, 500);
|
|
}
|
|
|
|
if (obj.parameterNames) {
|
|
grip.parameterNames = obj.parameterNames;
|
|
}
|
|
|
|
// Check if the developer has added a de-facto standard displayName
|
|
// property for us to use.
|
|
let userDisplayName;
|
|
try {
|
|
userDisplayName = obj.getOwnPropertyDescriptor("displayName");
|
|
} catch (e) {
|
|
// Calling getOwnPropertyDescriptor with displayName might throw
|
|
// with "permission denied" errors for some functions.
|
|
dumpn(e);
|
|
}
|
|
|
|
if (userDisplayName && typeof userDisplayName.value == "string" &&
|
|
userDisplayName.value) {
|
|
grip.userDisplayName = hooks.createValueGrip(userDisplayName.value);
|
|
}
|
|
|
|
let dbgGlobal = hooks.getGlobalDebugObject();
|
|
if (dbgGlobal) {
|
|
let script = dbgGlobal.makeDebuggeeValue(obj.unsafeDereference()).script;
|
|
if (script) {
|
|
grip.location = {
|
|
url: script.url,
|
|
line: script.startLine
|
|
};
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}],
|
|
|
|
RegExp: [function ({obj, hooks}, grip) {
|
|
let str = RegExp.prototype.toString.call(obj.unsafeDereference());
|
|
grip.displayString = hooks.createValueGrip(str);
|
|
return true;
|
|
}],
|
|
|
|
Date: [function ({obj, hooks}, grip) {
|
|
let time = Date.prototype.getTime.call(obj.unsafeDereference());
|
|
|
|
grip.preview = {
|
|
timestamp: hooks.createValueGrip(time),
|
|
};
|
|
return true;
|
|
}],
|
|
|
|
Array: [function ({obj, hooks}, grip) {
|
|
let length = DevToolsUtils.getProperty(obj, "length");
|
|
if (typeof length != "number") {
|
|
return false;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "ArrayLike",
|
|
length: length,
|
|
};
|
|
|
|
if (hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let raw = obj.unsafeDereference();
|
|
let items = grip.preview.items = [];
|
|
|
|
for (let i = 0; i < length; ++i) {
|
|
// Array Xrays filter out various possibly-unsafe properties (like
|
|
// functions, and claim that the value is undefined instead. This
|
|
// is generally the right thing for privileged code accessing untrusted
|
|
// objects, but quite confusing for Object previews. So we manually
|
|
// override this protection by waiving Xrays on the array, and re-applying
|
|
// Xrays on any indexed value props that we pull off of it.
|
|
let desc = Object.getOwnPropertyDescriptor(Cu.waiveXrays(raw), i);
|
|
if (desc && !desc.get && !desc.set) {
|
|
let value = Cu.unwaiveXrays(desc.value);
|
|
value = makeDebuggeeValueIfNeeded(obj, value);
|
|
items.push(hooks.createValueGrip(value));
|
|
} else {
|
|
items.push(null);
|
|
}
|
|
|
|
if (items.length == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}],
|
|
|
|
Set: [function (objectActor, grip) {
|
|
let size = DevToolsUtils.getProperty(objectActor.obj, "size");
|
|
if (typeof size != "number") {
|
|
return false;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "ArrayLike",
|
|
length: size,
|
|
};
|
|
|
|
// Avoid recursive object grips.
|
|
if (objectActor.hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let items = grip.preview.items = [];
|
|
for (let item of enumSetEntries(objectActor)) {
|
|
items.push(item);
|
|
if (items.length == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}],
|
|
|
|
WeakSet: [function (objectActor, grip) {
|
|
let enumEntries = enumWeakSetEntries(objectActor);
|
|
|
|
grip.preview = {
|
|
kind: "ArrayLike",
|
|
length: enumEntries.size
|
|
};
|
|
|
|
// Avoid recursive object grips.
|
|
if (objectActor.hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let items = grip.preview.items = [];
|
|
for (let item of enumEntries) {
|
|
items.push(item);
|
|
if (items.length == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}],
|
|
|
|
Map: [function (objectActor, grip) {
|
|
let size = DevToolsUtils.getProperty(objectActor.obj, "size");
|
|
if (typeof size != "number") {
|
|
return false;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "MapLike",
|
|
size: size,
|
|
};
|
|
|
|
if (objectActor.hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let entries = grip.preview.entries = [];
|
|
for (let entry of enumMapEntries(objectActor)) {
|
|
entries.push(entry);
|
|
if (entries.length == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}],
|
|
|
|
WeakMap: [function (objectActor, grip) {
|
|
let enumEntries = enumWeakMapEntries(objectActor);
|
|
|
|
grip.preview = {
|
|
kind: "MapLike",
|
|
size: enumEntries.size
|
|
};
|
|
|
|
if (objectActor.hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let entries = grip.preview.entries = [];
|
|
for (let entry of enumEntries) {
|
|
entries.push(entry);
|
|
if (entries.length == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}],
|
|
|
|
DOMStringMap: [function ({obj, hooks}, grip, rawObj) {
|
|
if (!rawObj) {
|
|
return false;
|
|
}
|
|
|
|
let keys = obj.getOwnPropertyNames();
|
|
grip.preview = {
|
|
kind: "MapLike",
|
|
size: keys.length,
|
|
};
|
|
|
|
if (hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let entries = grip.preview.entries = [];
|
|
for (let key of keys) {
|
|
let value = makeDebuggeeValueIfNeeded(obj, rawObj[key]);
|
|
entries.push([key, hooks.createValueGrip(value)]);
|
|
if (entries.length == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}],
|
|
|
|
Proxy: [function ({obj, hooks}, grip, rawObj) {
|
|
grip.preview = {
|
|
kind: "Object",
|
|
ownProperties: Object.create(null),
|
|
ownPropertiesLength: 2
|
|
};
|
|
|
|
if (hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
grip.preview.ownProperties['<target>'] = {value: grip.proxyTarget};
|
|
grip.preview.ownProperties['<handler>'] = {value: grip.proxyHandler};
|
|
|
|
return true;
|
|
}],
|
|
};
|
|
|
|
/**
|
|
* Generic previewer for classes wrapping primitives, like String,
|
|
* Number and Boolean.
|
|
*
|
|
* @param string className
|
|
* Class name to expect.
|
|
* @param object classObj
|
|
* The class to expect, eg. String. The valueOf() method of the class is
|
|
* invoked on the given object.
|
|
* @param ObjectActor objectActor
|
|
* The object actor
|
|
* @param Object grip
|
|
* The result grip to fill in
|
|
* @return Booolean true if the object was handled, false otherwise
|
|
*/
|
|
function wrappedPrimitivePreviewer(className, classObj, objectActor, grip, rawObj) {
|
|
let {obj, hooks} = objectActor;
|
|
|
|
if (!obj.proto || obj.proto.class != className) {
|
|
return false;
|
|
}
|
|
|
|
let v = null;
|
|
try {
|
|
v = classObj.prototype.valueOf.call(rawObj);
|
|
} catch (ex) {
|
|
// valueOf() can throw if the raw JS object is "misbehaved".
|
|
return false;
|
|
}
|
|
|
|
if (v === null) {
|
|
return false;
|
|
}
|
|
|
|
let canHandle = GenericObject(objectActor, grip, rawObj, className === "String");
|
|
if (!canHandle) {
|
|
return false;
|
|
}
|
|
|
|
grip.preview.wrappedValue =
|
|
hooks.createValueGrip(makeDebuggeeValueIfNeeded(obj, v));
|
|
return true;
|
|
}
|
|
|
|
function GenericObject(objectActor, grip, rawObj, specialStringBehavior = false) {
|
|
let {obj, hooks} = objectActor;
|
|
if (grip.preview || grip.displayString || hooks.getGripDepth() > 1) {
|
|
return false;
|
|
}
|
|
|
|
let i = 0, names = [];
|
|
let preview = grip.preview = {
|
|
kind: "Object",
|
|
ownProperties: Object.create(null),
|
|
};
|
|
|
|
try {
|
|
names = obj.getOwnPropertyNames();
|
|
} catch (ex) {
|
|
// Calling getOwnPropertyNames() on some wrapped native prototypes is not
|
|
// allowed: "cannot modify properties of a WrappedNative". See bug 952093.
|
|
}
|
|
|
|
preview.ownPropertiesLength = names.length;
|
|
|
|
let length;
|
|
if (specialStringBehavior) {
|
|
length = DevToolsUtils.getProperty(obj, "length");
|
|
if (typeof length != "number") {
|
|
specialStringBehavior = false;
|
|
}
|
|
}
|
|
|
|
for (let name of names) {
|
|
if (specialStringBehavior && /^[0-9]+$/.test(name)) {
|
|
let num = parseInt(name, 10);
|
|
if (num.toString() === name && num >= 0 && num < length) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
let desc = objectActor._propertyDescriptor(name, true);
|
|
if (!desc) {
|
|
continue;
|
|
}
|
|
|
|
preview.ownProperties[name] = desc;
|
|
if (++i == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i < OBJECT_PREVIEW_MAX_ITEMS) {
|
|
preview.safeGetterValues = objectActor._findSafeGetterValues(
|
|
Object.keys(preview.ownProperties),
|
|
OBJECT_PREVIEW_MAX_ITEMS - i);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Preview functions that do not rely on the object class.
|
|
DebuggerServer.ObjectActorPreviewers.Object = [
|
|
function TypedArray({obj, hooks}, grip) {
|
|
if (TYPED_ARRAY_CLASSES.indexOf(obj.class) == -1) {
|
|
return false;
|
|
}
|
|
|
|
let length = DevToolsUtils.getProperty(obj, "length");
|
|
if (typeof length != "number") {
|
|
return false;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "ArrayLike",
|
|
length: length,
|
|
};
|
|
|
|
if (hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let raw = obj.unsafeDereference();
|
|
let global = Cu.getGlobalForObject(DebuggerServer);
|
|
let classProto = global[obj.class].prototype;
|
|
// The Xray machinery for TypedArrays denies indexed access on the grounds
|
|
// that it's slow, and advises callers to do a structured clone instead.
|
|
let safeView = Cu.cloneInto(classProto.subarray.call(raw, 0,
|
|
OBJECT_PREVIEW_MAX_ITEMS), global);
|
|
let items = grip.preview.items = [];
|
|
for (let i = 0; i < safeView.length; i++) {
|
|
items.push(safeView[i]);
|
|
}
|
|
|
|
return true;
|
|
},
|
|
|
|
function Error({obj, hooks}, grip) {
|
|
switch (obj.class) {
|
|
case "Error":
|
|
case "EvalError":
|
|
case "RangeError":
|
|
case "ReferenceError":
|
|
case "SyntaxError":
|
|
case "TypeError":
|
|
case "URIError":
|
|
let name = DevToolsUtils.getProperty(obj, "name");
|
|
let msg = DevToolsUtils.getProperty(obj, "message");
|
|
let stack = DevToolsUtils.getProperty(obj, "stack");
|
|
let fileName = DevToolsUtils.getProperty(obj, "fileName");
|
|
let lineNumber = DevToolsUtils.getProperty(obj, "lineNumber");
|
|
let columnNumber = DevToolsUtils.getProperty(obj, "columnNumber");
|
|
grip.preview = {
|
|
kind: "Error",
|
|
name: hooks.createValueGrip(name),
|
|
message: hooks.createValueGrip(msg),
|
|
stack: hooks.createValueGrip(stack),
|
|
fileName: hooks.createValueGrip(fileName),
|
|
lineNumber: hooks.createValueGrip(lineNumber),
|
|
columnNumber: hooks.createValueGrip(columnNumber),
|
|
};
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
},
|
|
|
|
function CSSMediaRule({obj, hooks}, grip, rawObj) {
|
|
if (isWorker || !rawObj || !(rawObj instanceof Ci.nsIDOMCSSMediaRule)) {
|
|
return false;
|
|
}
|
|
grip.preview = {
|
|
kind: "ObjectWithText",
|
|
text: hooks.createValueGrip(rawObj.conditionText),
|
|
};
|
|
return true;
|
|
},
|
|
|
|
function CSSStyleRule({obj, hooks}, grip, rawObj) {
|
|
if (isWorker || !rawObj || !(rawObj instanceof Ci.nsIDOMCSSStyleRule)) {
|
|
return false;
|
|
}
|
|
grip.preview = {
|
|
kind: "ObjectWithText",
|
|
text: hooks.createValueGrip(rawObj.selectorText),
|
|
};
|
|
return true;
|
|
},
|
|
|
|
function ObjectWithURL({obj, hooks}, grip, rawObj) {
|
|
if (isWorker || !rawObj || !(rawObj instanceof Ci.nsIDOMCSSImportRule ||
|
|
rawObj instanceof Ci.nsIDOMCSSStyleSheet ||
|
|
rawObj instanceof Ci.nsIDOMLocation ||
|
|
rawObj instanceof Ci.nsIDOMWindow)) {
|
|
return false;
|
|
}
|
|
|
|
let url;
|
|
if (rawObj instanceof Ci.nsIDOMWindow && rawObj.location) {
|
|
url = rawObj.location.href;
|
|
} else if (rawObj.href) {
|
|
url = rawObj.href;
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "ObjectWithURL",
|
|
url: hooks.createValueGrip(url),
|
|
};
|
|
|
|
return true;
|
|
},
|
|
|
|
function ArrayLike({obj, hooks}, grip, rawObj) {
|
|
if (isWorker || !rawObj ||
|
|
obj.class != "DOMStringList" &&
|
|
obj.class != "DOMTokenList" &&
|
|
!(rawObj instanceof Ci.nsIDOMMozNamedAttrMap ||
|
|
rawObj instanceof Ci.nsIDOMCSSRuleList ||
|
|
rawObj instanceof Ci.nsIDOMCSSValueList ||
|
|
rawObj instanceof Ci.nsIDOMFileList ||
|
|
rawObj instanceof Ci.nsIDOMFontFaceList ||
|
|
rawObj instanceof Ci.nsIDOMMediaList ||
|
|
rawObj instanceof Ci.nsIDOMNodeList ||
|
|
rawObj instanceof Ci.nsIDOMStyleSheetList)) {
|
|
return false;
|
|
}
|
|
|
|
if (typeof rawObj.length != "number") {
|
|
return false;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "ArrayLike",
|
|
length: rawObj.length,
|
|
};
|
|
|
|
if (hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let items = grip.preview.items = [];
|
|
|
|
for (let i = 0; i < rawObj.length &&
|
|
items.length < OBJECT_PREVIEW_MAX_ITEMS; i++) {
|
|
let value = makeDebuggeeValueIfNeeded(obj, rawObj[i]);
|
|
items.push(hooks.createValueGrip(value));
|
|
}
|
|
|
|
return true;
|
|
},
|
|
|
|
function CSSStyleDeclaration({obj, hooks}, grip, rawObj) {
|
|
if (isWorker || !rawObj ||
|
|
!(rawObj instanceof Ci.nsIDOMCSSStyleDeclaration)) {
|
|
return false;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "MapLike",
|
|
size: rawObj.length,
|
|
};
|
|
|
|
let entries = grip.preview.entries = [];
|
|
|
|
for (let i = 0; i < OBJECT_PREVIEW_MAX_ITEMS &&
|
|
i < rawObj.length; i++) {
|
|
let prop = rawObj[i];
|
|
let value = rawObj.getPropertyValue(prop);
|
|
entries.push([prop, hooks.createValueGrip(value)]);
|
|
}
|
|
|
|
return true;
|
|
},
|
|
|
|
function DOMNode({obj, hooks}, grip, rawObj) {
|
|
if (isWorker || obj.class == "Object" || !rawObj ||
|
|
!(rawObj instanceof Ci.nsIDOMNode)) {
|
|
return false;
|
|
}
|
|
|
|
let preview = grip.preview = {
|
|
kind: "DOMNode",
|
|
nodeType: rawObj.nodeType,
|
|
nodeName: rawObj.nodeName,
|
|
};
|
|
|
|
if (rawObj instanceof Ci.nsIDOMDocument && rawObj.location) {
|
|
preview.location = hooks.createValueGrip(rawObj.location.href);
|
|
} else if (rawObj instanceof Ci.nsIDOMDocumentFragment) {
|
|
preview.childNodesLength = rawObj.childNodes.length;
|
|
|
|
if (hooks.getGripDepth() < 2) {
|
|
preview.childNodes = [];
|
|
for (let node of rawObj.childNodes) {
|
|
let actor = hooks.createValueGrip(obj.makeDebuggeeValue(node));
|
|
preview.childNodes.push(actor);
|
|
if (preview.childNodes.length == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else if (rawObj instanceof Ci.nsIDOMElement) {
|
|
// Add preview for DOM element attributes.
|
|
if (rawObj instanceof Ci.nsIDOMHTMLElement) {
|
|
preview.nodeName = preview.nodeName.toLowerCase();
|
|
}
|
|
|
|
let i = 0;
|
|
preview.attributes = {};
|
|
preview.attributesLength = rawObj.attributes.length;
|
|
for (let attr of rawObj.attributes) {
|
|
preview.attributes[attr.nodeName] = hooks.createValueGrip(attr.value);
|
|
}
|
|
} else if (rawObj instanceof Ci.nsIDOMAttr) {
|
|
preview.value = hooks.createValueGrip(rawObj.value);
|
|
} else if (rawObj instanceof Ci.nsIDOMText ||
|
|
rawObj instanceof Ci.nsIDOMComment) {
|
|
preview.textContent = hooks.createValueGrip(rawObj.textContent);
|
|
}
|
|
|
|
return true;
|
|
},
|
|
|
|
function DOMEvent({obj, hooks}, grip, rawObj) {
|
|
if (isWorker || !rawObj || !(rawObj instanceof Ci.nsIDOMEvent)) {
|
|
return false;
|
|
}
|
|
|
|
let preview = grip.preview = {
|
|
kind: "DOMEvent",
|
|
type: rawObj.type,
|
|
properties: Object.create(null),
|
|
};
|
|
|
|
if (hooks.getGripDepth() < 2) {
|
|
let target = obj.makeDebuggeeValue(rawObj.target);
|
|
preview.target = hooks.createValueGrip(target);
|
|
}
|
|
|
|
let props = [];
|
|
if (rawObj instanceof Ci.nsIDOMMouseEvent) {
|
|
props.push("buttons", "clientX", "clientY", "layerX", "layerY");
|
|
} else if (rawObj instanceof Ci.nsIDOMKeyEvent) {
|
|
let modifiers = [];
|
|
if (rawObj.altKey) {
|
|
modifiers.push("Alt");
|
|
}
|
|
if (rawObj.ctrlKey) {
|
|
modifiers.push("Control");
|
|
}
|
|
if (rawObj.metaKey) {
|
|
modifiers.push("Meta");
|
|
}
|
|
if (rawObj.shiftKey) {
|
|
modifiers.push("Shift");
|
|
}
|
|
preview.eventKind = "key";
|
|
preview.modifiers = modifiers;
|
|
|
|
props.push("key", "charCode", "keyCode");
|
|
} else if (rawObj instanceof Ci.nsIDOMTransitionEvent) {
|
|
props.push("propertyName", "pseudoElement");
|
|
} else if (rawObj instanceof Ci.nsIDOMAnimationEvent) {
|
|
props.push("animationName", "pseudoElement");
|
|
} else if (rawObj instanceof Ci.nsIDOMClipboardEvent) {
|
|
props.push("clipboardData");
|
|
}
|
|
|
|
// Add event-specific properties.
|
|
for (let prop of props) {
|
|
let value = rawObj[prop];
|
|
if (value && (typeof value == "object" || typeof value == "function")) {
|
|
// Skip properties pointing to objects.
|
|
if (hooks.getGripDepth() > 1) {
|
|
continue;
|
|
}
|
|
value = obj.makeDebuggeeValue(value);
|
|
}
|
|
preview.properties[prop] = hooks.createValueGrip(value);
|
|
}
|
|
|
|
// Add any properties we find on the event object.
|
|
if (!props.length) {
|
|
let i = 0;
|
|
for (let prop in rawObj) {
|
|
let value = rawObj[prop];
|
|
if (prop == "target" || prop == "type" || value === null ||
|
|
typeof value == "function") {
|
|
continue;
|
|
}
|
|
if (value && typeof value == "object") {
|
|
if (hooks.getGripDepth() > 1) {
|
|
continue;
|
|
}
|
|
value = obj.makeDebuggeeValue(value);
|
|
}
|
|
preview.properties[prop] = hooks.createValueGrip(value);
|
|
if (++i == OBJECT_PREVIEW_MAX_ITEMS) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
},
|
|
|
|
function DOMException({obj, hooks}, grip, rawObj) {
|
|
if (isWorker || !rawObj || !(rawObj instanceof Ci.nsIDOMDOMException)) {
|
|
return false;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "DOMException",
|
|
name: hooks.createValueGrip(rawObj.name),
|
|
message: hooks.createValueGrip(rawObj.message),
|
|
code: hooks.createValueGrip(rawObj.code),
|
|
result: hooks.createValueGrip(rawObj.result),
|
|
filename: hooks.createValueGrip(rawObj.filename),
|
|
lineNumber: hooks.createValueGrip(rawObj.lineNumber),
|
|
columnNumber: hooks.createValueGrip(rawObj.columnNumber),
|
|
};
|
|
|
|
return true;
|
|
},
|
|
|
|
function PseudoArray({obj, hooks}, grip, rawObj) {
|
|
let length;
|
|
|
|
let keys = obj.getOwnPropertyNames();
|
|
if (keys.length == 0) {
|
|
return false;
|
|
}
|
|
|
|
// If no item is going to be displayed in preview, better display as sparse object.
|
|
// The first key should contain the smallest integer index (if any).
|
|
if(keys[0] >= OBJECT_PREVIEW_MAX_ITEMS) {
|
|
return false;
|
|
}
|
|
|
|
// Pseudo-arrays should only have array indices and, optionally, a "length" property.
|
|
// Since integer indices are sorted first, check if the last property is "length".
|
|
if(keys[keys.length-1] === "length") {
|
|
keys.pop();
|
|
length = DevToolsUtils.getProperty(obj, "length");
|
|
} else {
|
|
// Otherwise, let length be the (presumably) greatest array index plus 1.
|
|
length = +keys[keys.length-1] + 1;
|
|
}
|
|
// Check if length is a valid array length, i.e. is a Uint32 number.
|
|
if(typeof length !== "number" || length >>> 0 !== length) {
|
|
return false;
|
|
}
|
|
|
|
// Ensure all keys are increasing array indices smaller than length. The order is not
|
|
// guaranteed for exotic objects but, in most cases, big array indices and properties
|
|
// which are not integer indices should be at the end. Then, iterating backwards
|
|
// allows us to return earlier when the object is not completely a pseudo-array.
|
|
let prev = length;
|
|
for(let i = keys.length - 1; i >= 0; --i) {
|
|
let key = keys[i];
|
|
let numKey = key >>> 0; // ToUint32(key)
|
|
if (numKey + '' !== key || numKey >= prev) {
|
|
return false;
|
|
}
|
|
prev = numKey;
|
|
}
|
|
|
|
grip.preview = {
|
|
kind: "ArrayLike",
|
|
length: length,
|
|
};
|
|
|
|
// Avoid recursive object grips.
|
|
if (hooks.getGripDepth() > 1) {
|
|
return true;
|
|
}
|
|
|
|
let items = grip.preview.items = [];
|
|
let numItems = Math.min(OBJECT_PREVIEW_MAX_ITEMS, length);
|
|
|
|
for (let i = 0; i < numItems; ++i) {
|
|
let desc = obj.getOwnPropertyDescriptor(i);
|
|
if (desc && 'value' in desc) {
|
|
items.push(hooks.createValueGrip(desc.value));
|
|
} else {
|
|
items.push(null);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
},
|
|
|
|
function Object(objectActor, grip, rawObj) {
|
|
return GenericObject(objectActor, grip, rawObj, /* specialStringBehavior = */ false);
|
|
},
|
|
];
|
|
|
|
/**
|
|
* Get thisDebugger.Object referent's `promiseState`.
|
|
*
|
|
* @returns Object
|
|
* An object of one of the following forms:
|
|
* - { state: "pending" }
|
|
* - { state: "fulfilled", value }
|
|
* - { state: "rejected", reason }
|
|
*/
|
|
function getPromiseState(obj) {
|
|
if (obj.class != "Promise") {
|
|
throw new Error(
|
|
"Can't call `getPromiseState` on `Debugger.Object`s that don't " +
|
|
"refer to Promise objects.");
|
|
}
|
|
|
|
let state = { state: obj.promiseState };
|
|
if (state.state === "fulfilled") {
|
|
state.value = obj.promiseValue;
|
|
} else if (state.state === "rejected") {
|
|
state.reason = obj.promiseReason;
|
|
}
|
|
return state;
|
|
}
|
|
|
|
/**
|
|
* Determine if a given value is non-primitive.
|
|
*
|
|
* @param Any value
|
|
* The value to test.
|
|
* @return Boolean
|
|
* Whether the value is non-primitive.
|
|
*/
|
|
function isObject(value) {
|
|
const type = typeof value;
|
|
return type == "object" ? value !== null : type == "function";
|
|
}
|
|
|
|
/**
|
|
* Create a function that can safely stringify Debugger.Objects of a given
|
|
* builtin type.
|
|
*
|
|
* @param Function ctor
|
|
* The builtin class constructor.
|
|
* @return Function
|
|
* The stringifier for the class.
|
|
*/
|
|
function createBuiltinStringifier(ctor) {
|
|
return obj => ctor.prototype.toString.call(obj.unsafeDereference());
|
|
}
|
|
|
|
/**
|
|
* Stringify a Debugger.Object-wrapped Error instance.
|
|
*
|
|
* @param Debugger.Object obj
|
|
* The object to stringify.
|
|
* @return String
|
|
* The stringification of the object.
|
|
*/
|
|
function errorStringify(obj) {
|
|
let name = DevToolsUtils.getProperty(obj, "name");
|
|
if (name === "" || name === undefined) {
|
|
name = obj.class;
|
|
} else if (isObject(name)) {
|
|
name = stringify(name);
|
|
}
|
|
|
|
let message = DevToolsUtils.getProperty(obj, "message");
|
|
if (isObject(message)) {
|
|
message = stringify(message);
|
|
}
|
|
|
|
if (message === "" || message === undefined) {
|
|
return name;
|
|
}
|
|
return name + ": " + message;
|
|
}
|
|
|
|
/**
|
|
* Stringify a Debugger.Object based on its class.
|
|
*
|
|
* @param Debugger.Object obj
|
|
* The object to stringify.
|
|
* @return String
|
|
* The stringification for the object.
|
|
*/
|
|
function stringify(obj) {
|
|
if (obj.class == "DeadObject") {
|
|
const error = new Error("Dead object encountered.");
|
|
DevToolsUtils.reportException("stringify", error);
|
|
return "<dead object>";
|
|
}
|
|
|
|
const stringifier = stringifiers[obj.class] || stringifiers.Object;
|
|
|
|
try {
|
|
return stringifier(obj);
|
|
} catch (e) {
|
|
DevToolsUtils.reportException("stringify", e);
|
|
return "<failed to stringify object>";
|
|
}
|
|
}
|
|
|
|
// Used to prevent infinite recursion when an array is found inside itself.
|
|
var seen = null;
|
|
|
|
var stringifiers = {
|
|
Error: errorStringify,
|
|
EvalError: errorStringify,
|
|
RangeError: errorStringify,
|
|
ReferenceError: errorStringify,
|
|
SyntaxError: errorStringify,
|
|
TypeError: errorStringify,
|
|
URIError: errorStringify,
|
|
Boolean: createBuiltinStringifier(Boolean),
|
|
Function: createBuiltinStringifier(Function),
|
|
Number: createBuiltinStringifier(Number),
|
|
RegExp: createBuiltinStringifier(RegExp),
|
|
String: createBuiltinStringifier(String),
|
|
Object: obj => "[object " + obj.class + "]",
|
|
Array: obj => {
|
|
// If we're at the top level then we need to create the Set for tracking
|
|
// previously stringified arrays.
|
|
const topLevel = !seen;
|
|
if (topLevel) {
|
|
seen = new Set();
|
|
} else if (seen.has(obj)) {
|
|
return "";
|
|
}
|
|
|
|
seen.add(obj);
|
|
|
|
const len = DevToolsUtils.getProperty(obj, "length");
|
|
let string = "";
|
|
|
|
// The following check is only required because the debuggee could possibly
|
|
// be a Proxy and return any value. For normal objects, array.length is
|
|
// always a non-negative integer.
|
|
if (typeof len == "number" && len > 0) {
|
|
for (let i = 0; i < len; i++) {
|
|
const desc = obj.getOwnPropertyDescriptor(i);
|
|
if (desc) {
|
|
const { value } = desc;
|
|
if (value != null) {
|
|
string += isObject(value) ? stringify(value) : value;
|
|
}
|
|
}
|
|
|
|
if (i < len - 1) {
|
|
string += ",";
|
|
}
|
|
}
|
|
}
|
|
|
|
if (topLevel) {
|
|
seen = null;
|
|
}
|
|
|
|
return string;
|
|
},
|
|
DOMException: obj => {
|
|
const message = DevToolsUtils.getProperty(obj, "message") || "<no message>";
|
|
const result = (+DevToolsUtils.getProperty(obj, "result")).toString(16);
|
|
const code = DevToolsUtils.getProperty(obj, "code");
|
|
const name = DevToolsUtils.getProperty(obj, "name") || "<unknown>";
|
|
|
|
return '[Exception... "' + message + '" ' +
|
|
'code: "' + code + '" ' +
|
|
'nsresult: "0x' + result + " (" + name + ')"]';
|
|
},
|
|
Promise: obj => {
|
|
const { state, value, reason } = getPromiseState(obj);
|
|
let statePreview = state;
|
|
if (state != "pending") {
|
|
const settledValue = state === "fulfilled" ? value : reason;
|
|
statePreview += ": " + (typeof settledValue === "object" && settledValue !== null
|
|
? stringify(settledValue)
|
|
: settledValue);
|
|
}
|
|
return "Promise (" + statePreview + ")";
|
|
},
|
|
};
|
|
|
|
/**
|
|
* Make a debuggee value for the given object, if needed. Primitive values
|
|
* are left the same.
|
|
*
|
|
* Use case: you have a raw JS object (after unsafe dereference) and you want to
|
|
* send it to the client. In that case you need to use an ObjectActor which
|
|
* requires a debuggee value. The Debugger.Object.prototype.makeDebuggeeValue()
|
|
* method works only for JS objects and functions.
|
|
*
|
|
* @param Debugger.Object obj
|
|
* @param any value
|
|
* @return object
|
|
*/
|
|
function makeDebuggeeValueIfNeeded(obj, value) {
|
|
if (value && (typeof value == "object" || typeof value == "function")) {
|
|
return obj.makeDebuggeeValue(value);
|
|
}
|
|
return value;
|
|
}
|
|
|
|
/**
|
|
* Creates an actor for the specied "very long" string. "Very long" is specified
|
|
* at the server's discretion.
|
|
*
|
|
* @param string String
|
|
* The string.
|
|
*/
|
|
function LongStringActor(string) {
|
|
this.string = string;
|
|
this.stringLength = string.length;
|
|
}
|
|
|
|
LongStringActor.prototype = {
|
|
actorPrefix: "longString",
|
|
|
|
disconnect: function () {
|
|
// Because longStringActors is not a weak map, we won't automatically leave
|
|
// it so we need to manually leave on disconnect so that we don't leak
|
|
// memory.
|
|
this._releaseActor();
|
|
},
|
|
|
|
/**
|
|
* Returns a grip for this actor for returning in a protocol message.
|
|
*/
|
|
grip: function () {
|
|
return {
|
|
"type": "longString",
|
|
"initial": this.string.substring(
|
|
0, DebuggerServer.LONG_STRING_INITIAL_LENGTH),
|
|
"length": this.stringLength,
|
|
"actor": this.actorID
|
|
};
|
|
},
|
|
|
|
/**
|
|
* Handle a request to extract part of this actor's string.
|
|
*
|
|
* @param request object
|
|
* The protocol request object.
|
|
*/
|
|
onSubstring: function (request) {
|
|
return {
|
|
"from": this.actorID,
|
|
"substring": this.string.substring(request.start, request.end)
|
|
};
|
|
},
|
|
|
|
/**
|
|
* Handle a request to release this LongStringActor instance.
|
|
*/
|
|
onRelease: function () {
|
|
// TODO: also check if registeredPool === threadActor.threadLifetimePool
|
|
// when the web console moves aray from manually releasing pause-scoped
|
|
// actors.
|
|
this._releaseActor();
|
|
this.registeredPool.removeActor(this);
|
|
return {};
|
|
},
|
|
|
|
_releaseActor: function () {
|
|
if (this.registeredPool && this.registeredPool.longStringActors) {
|
|
delete this.registeredPool.longStringActors[this.string];
|
|
}
|
|
}
|
|
};
|
|
|
|
LongStringActor.prototype.requestTypes = {
|
|
"substring": LongStringActor.prototype.onSubstring,
|
|
"release": LongStringActor.prototype.onRelease
|
|
};
|
|
|
|
/**
|
|
* Create a grip for the given debuggee value. If the value is an
|
|
* object, will create an actor with the given lifetime.
|
|
*/
|
|
function createValueGrip(value, pool, makeObjectGrip) {
|
|
switch (typeof value) {
|
|
case "boolean":
|
|
return value;
|
|
|
|
case "string":
|
|
if (stringIsLong(value)) {
|
|
return longStringGrip(value, pool);
|
|
}
|
|
return value;
|
|
|
|
case "number":
|
|
if (value === Infinity) {
|
|
return { type: "Infinity" };
|
|
} else if (value === -Infinity) {
|
|
return { type: "-Infinity" };
|
|
} else if (Number.isNaN(value)) {
|
|
return { type: "NaN" };
|
|
} else if (!value && 1 / value === -Infinity) {
|
|
return { type: "-0" };
|
|
}
|
|
return value;
|
|
|
|
case "undefined":
|
|
return { type: "undefined" };
|
|
|
|
case "object":
|
|
if (value === null) {
|
|
return { type: "null" };
|
|
}
|
|
else if (value.optimizedOut ||
|
|
value.uninitialized ||
|
|
value.missingArguments) {
|
|
// The slot is optimized out, an uninitialized binding, or
|
|
// arguments on a dead scope
|
|
return {
|
|
type: "null",
|
|
optimizedOut: value.optimizedOut,
|
|
uninitialized: value.uninitialized,
|
|
missingArguments: value.missingArguments
|
|
};
|
|
}
|
|
return makeObjectGrip(value, pool);
|
|
|
|
case "symbol":
|
|
let form = {
|
|
type: "symbol"
|
|
};
|
|
let name = getSymbolName(value);
|
|
if (name !== undefined) {
|
|
form.name = createValueGrip(name, pool, makeObjectGrip);
|
|
}
|
|
return form;
|
|
|
|
default:
|
|
assert(false, "Failed to provide a grip for: " + value);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
const symbolProtoToString = Symbol.prototype.toString;
|
|
|
|
function getSymbolName(symbol) {
|
|
const name = symbolProtoToString.call(symbol).slice("Symbol(".length, -1);
|
|
return name || undefined;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the string is long enough to use a LongStringActor instead
|
|
* of passing the value directly over the protocol.
|
|
*
|
|
* @param str String
|
|
* The string we are checking the length of.
|
|
*/
|
|
function stringIsLong(str) {
|
|
return str.length >= DebuggerServer.LONG_STRING_LENGTH;
|
|
}
|
|
|
|
/**
|
|
* Create a grip for the given string.
|
|
*
|
|
* @param str String
|
|
* The string we are creating a grip for.
|
|
* @param pool ActorPool
|
|
* The actor pool where the new actor will be added.
|
|
*/
|
|
function longStringGrip(str, pool) {
|
|
if (!pool.longStringActors) {
|
|
pool.longStringActors = {};
|
|
}
|
|
|
|
if (pool.longStringActors.hasOwnProperty(str)) {
|
|
return pool.longStringActors[str].grip();
|
|
}
|
|
|
|
let actor = new LongStringActor(str);
|
|
pool.addActor(actor);
|
|
pool.longStringActors[str] = actor;
|
|
return actor.grip();
|
|
}
|
|
|
|
exports.ObjectActor = ObjectActor;
|
|
exports.PropertyIteratorActor = PropertyIteratorActor;
|
|
exports.LongStringActor = LongStringActor;
|
|
exports.createValueGrip = createValueGrip;
|
|
exports.stringIsLong = stringIsLong;
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exports.longStringGrip = longStringGrip;
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