зеркало из https://github.com/mozilla/gecko-dev.git
67 строки
1.8 KiB
JavaScript
67 строки
1.8 KiB
JavaScript
/* 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 protocol = require("devtools/shared/protocol");
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const { symbolIteratorSpec } = require("devtools/shared/specs/symbol-iterator");
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const DevToolsUtils = require("devtools/shared/DevToolsUtils");
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/**
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* Creates an actor to iterate over an object's symbols.
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*
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* @param objectActor ObjectActor
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* The object actor.
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*/
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const SymbolIteratorActor = protocol.ActorClassWithSpec(symbolIteratorSpec, {
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initialize(objectActor, conn) {
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protocol.Actor.prototype.initialize.call(this, conn);
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let symbols = [];
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if (DevToolsUtils.isSafeDebuggerObject(objectActor.obj)) {
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try {
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symbols = objectActor.obj.getOwnPropertySymbols();
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} catch (err) {
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// The above can throw when the debuggee does not subsume the object's
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// compartment, or for some WrappedNatives like Cu.Sandbox.
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}
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}
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this.iterator = {
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size: symbols.length,
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symbolDescription(index) {
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const symbol = symbols[index];
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return {
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name: symbol.toString(),
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descriptor: objectActor._propertyDescriptor(symbol),
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};
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},
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};
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},
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form() {
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return {
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type: this.typeName,
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actor: this.actorID,
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count: this.iterator.size,
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};
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},
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slice({ start, count }) {
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const ownSymbols = [];
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for (let i = start, m = start + count; i < m; i++) {
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ownSymbols.push(this.iterator.symbolDescription(i));
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}
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return {
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ownSymbols,
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};
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},
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all() {
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return this.slice({ start: 0, count: this.iterator.size });
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},
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});
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exports.SymbolIteratorActor = SymbolIteratorActor;
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