comunic/3rdparty/pdf.js/web/firefoxcom.js
2016-11-19 12:08:12 +01:00

136 lines
4.3 KiB
JavaScript
Executable File

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals Preferences, PDFJS, Promise */
'use strict';
var FirefoxCom = (function FirefoxComClosure() {
return {
/**
* Creates an event that the extension is listening for and will
* synchronously respond to.
* NOTE: It is reccomended to use request() instead since one day we may not
* be able to synchronously reply.
* @param {String} action The action to trigger.
* @param {String} data Optional data to send.
* @return {*} The response.
*/
requestSync: function(action, data) {
var request = document.createTextNode('');
document.documentElement.appendChild(request);
var sender = document.createEvent('CustomEvent');
sender.initCustomEvent('pdf.js.message', true, false,
{action: action, data: data, sync: true});
request.dispatchEvent(sender);
var response = sender.detail.response;
document.documentElement.removeChild(request);
return response;
},
/**
* Creates an event that the extension is listening for and will
* asynchronously respond by calling the callback.
* @param {String} action The action to trigger.
* @param {String} data Optional data to send.
* @param {Function} callback Optional response callback that will be called
* with one data argument.
*/
request: function(action, data, callback) {
var request = document.createTextNode('');
if (callback) {
document.addEventListener('pdf.js.response', function listener(event) {
var node = event.target;
var response = event.detail.response;
document.documentElement.removeChild(node);
document.removeEventListener('pdf.js.response', listener, false);
return callback(response);
}, false);
}
document.documentElement.appendChild(request);
var sender = document.createEvent('CustomEvent');
sender.initCustomEvent('pdf.js.message', true, false, {
action: action,
data: data,
sync: false,
responseExpected: !!callback
});
return request.dispatchEvent(sender);
}
};
})();
var DownloadManager = (function DownloadManagerClosure() {
function DownloadManager() {}
DownloadManager.prototype = {
downloadUrl: function DownloadManager_downloadUrl(url, filename) {
FirefoxCom.request('download', {
originalUrl: url,
filename: filename
});
},
downloadData: function DownloadManager_downloadData(data, filename,
contentType) {
var blobUrl = PDFJS.createObjectURL(data, contentType);
FirefoxCom.request('download', {
blobUrl: blobUrl,
originalUrl: blobUrl,
filename: filename,
isAttachment: true
});
},
download: function DownloadManager_download(blob, url, filename) {
var blobUrl = window.URL.createObjectURL(blob);
FirefoxCom.request('download', {
blobUrl: blobUrl,
originalUrl: url,
filename: filename
},
function response(err) {
if (err && this.onerror) {
this.onerror(err);
}
window.URL.revokeObjectURL(blobUrl);
}.bind(this)
);
}
};
return DownloadManager;
})();
Preferences._writeToStorage = function (prefObj) {
return new Promise(function (resolve) {
FirefoxCom.request('setPreferences', prefObj, resolve);
});
};
Preferences._readFromStorage = function (prefObj) {
return new Promise(function (resolve) {
FirefoxCom.request('getPreferences', prefObj, function (prefStr) {
var readPrefs = JSON.parse(prefStr);
resolve(readPrefs);
});
});
};