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// Copyright 2019 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.
import 'chrome://resources/cr_elements/shared_vars_css.m.js';
import './strings.m.js';
import {I18nBehavior} from 'chrome://resources/js/i18n_behavior.m.js';
import {loadTimeData} from 'chrome://resources/js/load_time_data.m.js';
import {html, Polymer} from 'chrome://resources/polymer/v3_0/polymer/polymer_bundled.min.js';
import {BrowserSwitchProxyImpl} from './browser_switch_proxy.js';
/** @type {number} */
const MS_PER_SECOND = 1000;
/** @enum {string} */
const LaunchError = {
GENERIC_ERROR: 'genericError',
PROTOCOL_ERROR: 'protocolError',
};
Polymer({
is: 'browser-switch-app',
_template: html`{__html_template__}`,
behaviors: [I18nBehavior],
properties: {
/**
* URL to launch in the alternative browser.
* @private
*/
url_: {
type: String,
value: function() {
return (new URLSearchParams(window.location.search)).get('url') || '';
},
},
/**
* Error message, or empty string if no error has occurred (yet).
* @private
*/
error_: {
type: String,
value: '',
},
/**
* Countdown displayed to the user, number of seconds until launching. If 0
* or less, doesn't get displayed at all.
* @private
*/
secondCounter_: {
type: Number,
value: 0,
},
},
/** @override */
attached: function() {
// If '?done=...' is specified in the URL, this tab was-reopened, or the
// entire browser was closed by LBS and re-opened. In that case, go to NTP
// instead.
const done = (new URLSearchParams(window.location.search)).has('done');
if (done) {
getProxy().gotoNewTabPage();
return;
}
// Sanity check the URL to make sure nothing really funky is going on.
const anchor = document.createElement('a');
anchor.href = this.url_;
if (!/^(file|http|https):$/.test(anchor.protocol)) {
this.error_ = LaunchError.PROTOCOL_ERROR;
return;
}
const milliseconds = loadTimeData.getInteger('launchDelay');
setTimeout(this.launchAndCloseTab_.bind(this), milliseconds);
this.startCountdown_(Math.floor(milliseconds / 1000));
},
/** @private */
launchAndCloseTab_: function() {
// Mark this page with '?done=...' so that restoring the tab doesn't
// immediately re-trigger LBS.
history.pushState({}, '', '/?done=true');
getProxy().launchAlternativeBrowserAndCloseTab(this.url_).catch(() => {
this.error_ = LaunchError.GENERIC_ERROR;
});
},
/**
* @param {number} seconds
* @private
*/
startCountdown_: function(seconds) {
this.secondCounter_ = seconds;
const intervalId = setInterval(() => {
this.secondCounter_--;
if (this.secondCounter_ <= 0) {
clearInterval(intervalId);
}
}, 1 * MS_PER_SECOND);
},
/**
* @return {string}
* @private
*/
computeTitle_: function() {
if (this.error_) {
return this.i18n('errorTitle', getBrowserName());
}
if (this.secondCounter_ > 0) {
return this.i18n('countdownTitle', this.secondCounter_, getBrowserName());
}
return this.i18n('openingTitle', getBrowserName());
},
/**
* @return {string}
* @private
*/
computeDescription_: function() {
if (this.error_) {
return this.i18n(
this.error_, getUrlHostname(this.url_), getBrowserName());
}
return this.i18n(
'description', getUrlHostname(this.url_), getBrowserName());
},
});
function getBrowserName() {
return loadTimeData.getString('browserName');
}
function getUrlHostname(url) {
const anchor = document.createElement('a');
anchor.href = url;
// Return entire url if parsing failed (which means the URL is bogus).
return anchor.hostname || url;
}
function getProxy() {
return BrowserSwitchProxyImpl.getInstance();
}
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