'use strict';
const promiseSleep = require('./promise').sleep;
const { getHiddenWindow } = require('sdk/window/utils');
let hiddenWindow = null;
module.exports = {
get window() {
if (!hiddenWindow) {
try {
let win = getHiddenWindow();
if (win.document.readyState === 'complete' && win.document.documentElement.appendChild) {
hiddenWindow = win;
}
} catch (e) {}
}
return hiddenWindow;
},
getFrame: function (props = {}) {
if (typeof props.url === 'undefined') {
const randomId = Date.now() + Math.floor(Math.random() * 1000000);
switch (props.contentType) {
case 'xul':
props.url = 'data:application/vnd.mozilla.xul+xml;charset=utf-8,' + encodeURIComponent(``);
break;
default:
props.url = 'data:text/html;charset=utf-8,' + encodeURIComponent(`` + '');
break;
}
}
return promiseSleep(10000, () => Boolean(this.window)).then(() => createFrame(props));
},
removeFrame: removeFrame
};
function createFrame({ url, id }) {
return new Promise((resolve, reject) => {
if (!url || typeof url !== 'string') {
reject(new TypeError('url must be a string.'));
return;
}
let hiddenWindow = module.exports.window;
let hiddenDoc = hiddenWindow && hiddenWindow.document;
if (!hiddenDoc) {
reject(new Error('No hidden document'));
return;
}
id = id || encodeURIComponent(url);
let frameLoader = hiddenDoc.getElementById(id);
if (!frameLoader) {
frameLoader = hiddenDoc.createElement('iframe');
frameLoader.setAttribute('id', id);
frameLoader.setAttribute('src', url);
hiddenDoc.documentElement.appendChild(frameLoader);
}
return ensureFrameLoaded(frameLoader).then(resolve);
});
}
function ensureFrameLoaded(frameLoader) {
const url = frameLoader.getAttribute('src');
const waitFrameLocation = promiseSleep(10000, () => {
return String(frameLoader.contentWindow && frameLoader.contentWindow.location) === url;
});
return new Promise((resolve, reject) => {
waitFrameLocation.then(() => {
promiseSleep(10000, () => frameLoader.contentWindow.document.readyState === 'complete').then(() => resolve(frameLoader), () => reject(new Error(`Can't get hidden window for "${ url }"`))), e => {
reject(new Error(`Can't get hidden window for "${ url }"`));
};
});
});
}
function removeFrame({ frame, window, url, id }) {
return new Promise((resolve, reject) => {
if (!url) {
if (frame) {
window = frame.contentWindow;
}
if (window) {
url = window.location.toString();
}
}
if (!url || typeof url !== 'string') {
reject(new TypeError('url must be a string.'));
return;
}
const hiddenWindow = module.exports.window;
const hiddenDoc = hiddenWindow && hiddenWindow.document;
if (!hiddenDoc) {
resolve();
return;
}
id = id || encodeURIComponent(url);
const frameLoader = hiddenDoc.getElementById(id);
if (frameLoader) {
frameLoader.parentNode.removeChild(frameLoader);
}
resolve(frameLoader);
});
}