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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const { extend } = require("devtools/shared/extend");
const { ObjectActorProto } = require("devtools/server/actors/object");
const protocol = require("devtools/shared/protocol");
const { ActorClassWithSpec } = protocol;
const { objectSpec } = require("devtools/shared/specs/object");
/**
* Protocol.js expects only the prototype object, and does not maintain the prototype
* chain when it constructs the ActorClass. For this reason we are using extend to
* maintain the properties of ObjectActorProto.
**/
const proto = extend({}, ObjectActorProto);
Object.assign(proto, {
/**
* Creates a pause-scoped actor for the specified object.
* @see ObjectActor
*/
initialize: function(obj, hooks, conn) {
ObjectActorProto.initialize.call(this, obj, hooks, conn);
this.hooks.promote = hooks.promote;
this.hooks.isThreadLifetimePool = hooks.isThreadLifetimePool;
},
isPaused: function() {
return this.threadActor ? this.threadActor.state === "paused" : true;
},
withPaused: function(method) {
return function() {
if (this.isPaused()) {
return method.apply(this, arguments);
}
return {
error: "wrongState",
message:
this.constructor.name +
" actors can only be accessed while the thread is paused.",
};
};
},
});
const guardWithPaused = [
"decompile",
"displayString",
"ownPropertyNames",
"parameterNames",
"property",
"prototype",
"prototypeAndProperties",
"scope",
];
guardWithPaused.forEach(f => {
proto[f] = proto.withPaused(ObjectActorProto[f]);
});
Object.assign(proto, {
/**
* Handle a protocol request to promote a pause-lifetime grip to a
* thread-lifetime grip.
*
* @param request object
* The protocol request object.
*/
threadGrip: proto.withPaused(function(request) {
this.hooks.promote();
return {};
}),
/**
* Handle a protocol request to release a thread-lifetime grip.
*
* @param request object
* The protocol request object.
*/
destroy: proto.withPaused(function(request) {
if (this.hooks.isThreadLifetimePool()) {
return {
error: "notReleasable",
message: "Only thread-lifetime actors can be released.",
};
}
return protocol.Actor.prototype.destroy.call(this);
}),
});
exports.PauseScopedObjectActor = ActorClassWithSpec(objectSpec, proto);
// ActorClassWithSpec(objectSpec, {...ObjectActorProto, ...proto});
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