gecko/browser/base/content/aboutHome.js

296 lines
14 KiB
JavaScript

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License
* Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is aboutHome.xhtml.
*
* The Initial Developer of the Original Code is the Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Marco Bonardo <mak77@bonardo.net> (original author)
* Mihai Sucan <mihai.sucan@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
// If a definition requires additional params, check that the final search url
// is handled correctly by the engine.
const SEARCH_ENGINES = {
"Google": {
image: "data:image/png;base64," +
"iVBORw0KGgoAAAANSUhEUgAAAEYAAAAcCAYAAADcO8kVAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJ" +
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"ak52XTQ2333prxdJzuyRXGSw7KjFEnlUwYF1zrROLbxO4umwcVOWkjV0z51YyXqaEQsR9djYQMX4" +
"TTwVQst8NiVlPqS+Upj0EAyZB9+tcB4ZByJ71V5C7ntcj550Q4KBTl7pvjFVmtbnYvSQ7ACcEZoD" +
"fTUwbgDE490fN6B5o5fRjdAXiDNBGKLwNVMLZnTJLPrDh1hypAFHAkTzXnNqc+GHfG75oYxVYN0k" +
"YEwQXPEAcuF9ZIH/01ku1/ChivJHkNCeMk8sCNXChCdhQr7+6uvC4RU4d8RJ1PRuV64JKdDSU3su" +
"HuHMuKJUcuWMhMU4QHwflWBHgFEb4tXuSs3gEaLV7bdDlXvU6rm7hKH8SobmmawohUNkeSDUghdD" +
"0vfXMrbnYdOoSij6Eg108TFje6EOMwbjwZ0zUHeXA5GGANoz6jm2VwCotikBcN7YpvHEtvrDnoqh" +
"t58kuzpDJcoPhQDO6YGn3+pTK/007QYUoClgOUHpWAUuldPV4VYYn8rXfMDpHN4NS4McOBpsJ7fZ" +
"9utrbNvLWYdzrq5H3PO+Hfmy8GCKaI7U7o/3wq6ObklOIkhykcD+sbuFMeKAcKYos8RvSczhEgLM" +
"EioJknDoTEznWLDNJb5RO2POPBfqf2frdFN3LAz6Im+agU9e+Xzn8HLod+dcueXnDk/vX2DZlQaK" +
"/ebpLV0miPmcCXs1xZySWC9JMA/Fz3/CeXZbgcTCIEVMqiSAkFguxQ0mX06IX9KueIuPpV/xPCS+" +
"ttQGnDMs6Tej8SaseF4LN9c9cnxNj6VxI8Q+3em9Hx+c3PmW1UDztMZtXVLEfdymbGAJ60kJGZQm" +
"tH99bE8YGN/wd/mgxdG7NFDb8/ZohryYA5HguHhI5uYO27vyoqtrmAiXr31JX/V48CuY8R8FJhxE" +
"eeEAQWk9HnYlFmMJoRKG03QLtUJ7/93FvpXXJ7wM/6Za4l71UEu5pWkoucv0Be0tm95vmUdy5t5k" +
"tpbPbe8B2vmsi7+rl2Nf4yVaUlLHSQXu7r8tw1JyT+ivhQBaAhZUxBSC5EPpPtMKVDzi3z/+HZHJ" +
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"7GUnpHbrbG8EzsfWfwgwAEfC/ToQIhkhAAAAAElFTkSuQmCC"
, params: "source=hp&channel=np"
}
, "Яндекс":
{
image: "data:image/png;base64," +
"iVBORw0KGgoAAAANSUhEUgAAAEYAAAAcCAYAAADcO8kVAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJ" +
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"3/bwlAn/Jt/EtJdNmdvidjxcpyrjT+D6Fx7LPoA5jf3ktU5metY9rtZcRHNn0vV3cO0rtf6GwN9v" +
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"/BLoFsECwXsw1gUIZa9h7NvZivGLgkk010eHjv5jbitXD1HiWVMhuB7jDXR9E/R0Qa3nPvvmTxZc" +
"7fGWyQhNK6/R9b8Ev4aSr0HyunWQ3Q/li8/hdh8JTiOD+DpPa7jegHtriUN35zDMRMEJGH9J17dB" +
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"ZtYcLVgGD1wq2K7mx0LvKITHaFlCbny/oI4M43uQDJJkL3KH5RWnB/auh96ax9AGnKQdoZNAyO4T" +
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"MPMp8S0roARHar+QYS6FXp9nv230dicVcA7LaZoxHo/ncfIbEdi6Qgxje4vFRL5aRqA/uxn6Vc9c" +
"muK/lXqeuQXsPwZMdi0RPedxH1AFva0QwyygavDkCBjlFuy/HJWhksLQgOVyxWqh3mYx7RND2Pi8" +
"0n1+baawmU9e2o6x/XR7raIQVb4mskGQQaO4ydNENlATeTE1kXOQc/agXDpZqhq42dQL2US9G1Wl" +
"G5XEzaWJbyTBddzcTuSmAYTMOKybQWsmeppIbk5nqcbxJ1RHO37B10TeRL3KU543kUKF0J8leqgq" +
"8ae8PdAd6ltPL954LXQV/m4HEbgaYqjT6KNZHWhAKd5+mzpDN4WflUdw5koweitv4lldX2QpxQSc" +
"/UOfx9jvvTHBKP+/RmKRoHwIiYg8pgQJsszTKFYSV2qC0VcShyqnqlEKRpolqsAyFfnpKmLOnOgr" +
"VAVirhYnYzsZLbgSe57nwtL375N8H+Oy3H2qKpAKEL5eVc65E04rD2NW66uWrUDobKnAnPs7PR5+" +
"tLFQHjMS0knhEZLdim/8bxId+RetX/4RYACXlwEEPBQycwAAAABJRU5ErkJggg=="
}
};
// The process of adding a new default snippet involves:
// * add a new entity to aboutHome.dtd
// * add a <span/> for it in aboutHome.xhtml
// * add an entry here in the proper ordering (based on spans)
// The <a/> part of the snippet will be linked to the corresponding url.
const DEFAULT_SNIPPETS_URLS = [
"http://www.mozilla.com/firefox/features/?WT.mc_ID=default1"
, "https://addons.mozilla.org/firefox/?src=snippet&WT.mc_ID=default2"
];
const SNIPPETS_UPDATE_INTERVAL_MS = 86400000; // 1 Day.
let gSearchEngine;
function onLoad(event)
{
setupSearchEngine();
document.getElementById("searchText").focus();
loadSnippets();
}
function onSearchSubmit(aEvent)
{
let searchTerms = document.getElementById("searchText").value;
if (gSearchEngine && searchTerms.length > 0) {
const SEARCH_TOKENS = {
"_searchTerms_": encodeURIComponent(searchTerms)
}
let url = gSearchEngine.searchUrl;
for (let key in SEARCH_TOKENS) {
url = url.replace(key, SEARCH_TOKENS[key]);
}
window.location.href = url;
}
aEvent.preventDefault();
}
function setupSearchEngine()
{
gSearchEngine = JSON.parse(localStorage["search-engine"]);
if (!gSearchEngine)
return;
// Look for extended information, like logo and links.
let searchEngineInfo = SEARCH_ENGINES[gSearchEngine.name];
if (searchEngineInfo) {
for (let prop in searchEngineInfo)
gSearchEngine[prop] = searchEngineInfo[prop];
}
// Enqueue additional params if required by the engine definition.
if (gSearchEngine.params)
gSearchEngine.searchUrl += "&" + gSearchEngine.params;
// Add search engine logo.
if (gSearchEngine.image) {
let logoElt = document.getElementById("searchEngineLogo");
logoElt.src = gSearchEngine.image;
logoElt.alt = gSearchEngine.name;
}
}
function loadSnippets()
{
// Check last snippets update.
let lastUpdate = localStorage["snippets-last-update"];
let updateURL = localStorage["snippets-update-url"];
if (updateURL && (!lastUpdate ||
Date.now() - lastUpdate > SNIPPETS_UPDATE_INTERVAL_MS)) {
// Even if fetching should fail we don't want to spam the server, thus
// set the last update time regardless its results. Will retry tomorrow.
localStorage["snippets-last-update"] = Date.now();
// Try to update from network.
let xhr = new XMLHttpRequest();
xhr.open('GET', updateURL, true);
xhr.onerror = function (event) {
showSnippets();
};
xhr.onload = function (event)
{
if (xhr.status == 200) {
localStorage["snippets"] = xhr.responseText;
}
showSnippets();
};
xhr.send(null);
} else {
showSnippets();
}
}
function showSnippets()
{
let snippetsElt = document.getElementById("snippets");
let snippets = localStorage["snippets"];
// If there are remotely fetched snippets, try to to show them.
if (snippets) {
// Injecting snippets can throw if they're invalid XML.
try {
snippetsElt.innerHTML = snippets;
// Scripts injected by innerHTML are inactive, so we have to relocate them
// through DOM manipulation to activate their contents.
Array.forEach(snippetsElt.getElementsByTagName("script"), function(elt) {
let relocatedScript = document.createElement("script");
relocatedScript.type = "text/javascript;version=1.8";
relocatedScript.text = elt.text;
elt.parentNode.replaceChild(relocatedScript, elt);
});
return;
} catch (ex) {
// Bad content, continue to show default snippets.
}
}
// Show default snippets otherwise.
let defaultSnippetsElt = document.getElementById("defaultSnippets");
let entries = defaultSnippetsElt.querySelectorAll("span");
// Choose a random snippet. Assume there is always at least one.
let randIndex = Math.round(Math.random() * (entries.length - 1));
let entry = entries[randIndex];
// Inject url in the eventual link.
if (DEFAULT_SNIPPETS_URLS[randIndex]) {
let links = entry.getElementsByTagName("a");
// Default snippets can have only one link, otherwise something is messed
// up in the translation.
if (links.length == 1) {
links[0].href = DEFAULT_SNIPPETS_URLS[randIndex];
activateSnippetsButtonClick(entry);
}
}
// Move the default snippet to the snippets element.
snippetsElt.appendChild(entry);
}
/**
* Searches a single link element in aElt and binds its href to the click
* action of the snippets button.
*
* @param aElt
* Element to search the link into.
*/
function activateSnippetsButtonClick(aElt) {
let links = aElt.getElementsByTagName("a");
if (links.length == 1) {
document.getElementById("snippets")
.addEventListener("click", function(aEvent) {
if (aEvent.target.nodeName != "a")
window.location = links[0].href;
}, false);
}
}