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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 protocol = require("devtools/shared/protocol");
const {Arg, RetVal, generateActorSpec} = protocol;
const promise = require("promise");
const {Class} = require("sdk/core/heritage");
const longStringSpec = generateActorSpec({
typeName: "longstractor",
methods: {
substring: {
request: {
start: Arg(0),
end: Arg(1)
},
response: { substring: RetVal() },
},
release: { release: true },
},
});
exports.longStringSpec = longStringSpec;
/**
* When a caller is expecting a LongString actor but the string is already available on
* client, the SimpleStringFront can be used as it shares the same API as a
* LongStringFront but will not make unnecessary trips to the server.
*/
const SimpleStringFront = Class({
initialize: function (str) {
this.str = str;
},
get length() {
return this.str.length;
},
get initial() {
return this.str;
},
string: function () {
return promise.resolve(this.str);
},
substring: function (start, end) {
return promise.resolve(this.str.substring(start, end));
},
release: function () {
this.str = null;
return promise.resolve(undefined);
}
});
exports.SimpleStringFront = SimpleStringFront;
// The long string actor needs some custom marshalling, because it is sometimes
// returned as a primitive rather than a complete form.
var stringActorType = protocol.types.getType("longstractor");
protocol.types.addType("longstring", {
_actor: true,
write: (value, context, detail) => {
if (!(context instanceof protocol.Actor)) {
throw Error("Passing a longstring as an argument isn't supported.");
}
if (value.short) {
return value.str;
}
return stringActorType.write(value, context, detail);
},
read: (value, context, detail) => {
if (context instanceof protocol.Actor) {
throw Error("Passing a longstring as an argument isn't supported.");
}
if (typeof (value) === "string") {
return new SimpleStringFront(value);
}
return stringActorType.read(value, context, detail);
}
});
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