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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Custom binding for the webstore API.
var webstoreNatives = requireNative('webstore');
var Event = require('event_bindings').Event;
function Installer() {
this._pendingInstall = null;
this.onInstallStageChanged =
new Event(null, [{name: 'stage', type: 'string'}], {unmanaged: true});
this.onDownloadProgress =
new Event(null, [{name: 'progress', type: 'number'}], {unmanaged: true});
}
Installer.prototype.install = function(url, onSuccess, onFailure) {
if (this._pendingInstall)
throw new Error('A Chrome Web Store installation is already pending.');
if (url !== undefined && typeof(url) !== 'string') {
throw new Error(
'The Chrome Web Store item link URL parameter must be a string.');
}
if (onSuccess !== undefined && typeof(onSuccess) !== 'function')
throw new Error('The success callback parameter must be a function.');
if (onFailure !== undefined && typeof(onFailure) !== 'function')
throw new Error('The failure callback parameter must be a function.');
// Since we call Install() with a bool for if we have listeners, listeners
// must be set prior to the inline installation starting (this is also
// noted in the Event documentation in
// chrome/common/extensions/api/webstore.json).
var installId = webstoreNatives.Install(
this.onInstallStageChanged.hasListeners(),
this.onDownloadProgress.hasListeners(),
url,
onSuccess,
onFailure);
if (installId !== undefined) {
this._pendingInstall = {
installId: installId,
onSuccess: onSuccess,
onFailure: onFailure
};
}
};
Installer.prototype.onInstallResponse =
function(installId, success, error, resultCode) {
var pendingInstall = this._pendingInstall;
if (!pendingInstall || pendingInstall.installId != installId) {
// TODO(kalman): should this be an error?
return;
}
try {
if (success && pendingInstall.onSuccess)
pendingInstall.onSuccess();
else if (!success && pendingInstall.onFailure)
pendingInstall.onFailure(error, resultCode);
} catch (e) {
console.error('Exception in chrome.webstore.install response handler: ' +
e.stack);
} finally {
this._pendingInstall = null;
}
};
Installer.prototype.onInstallStageChanged = function(installStage) {
this.onInstallStageChanged.dispatch(installStage);
};
Installer.prototype.onDownloadProgress = function(progress) {
this.onDownloadProgress.dispatch(progress);
};
var installer = new Installer();
var chromeWebstore = {
install: function (url, onSuccess, onFailure) {
installer.install(url, onSuccess, onFailure);
},
onInstallStageChanged: installer.onInstallStageChanged,
onDownloadProgress: installer.onDownloadProgress
};
exports.binding = chromeWebstore;
// Called by webstore_bindings.cc.
exports.onInstallResponse =
Installer.prototype.onInstallResponse.bind(installer);
exports.onInstallStageChanged =
Installer.prototype.onInstallStageChanged.bind(installer);
exports.onDownloadProgress =
Installer.prototype.onDownloadProgress.bind(installer);
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