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// Copyright (c) 2011 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.
localStrings = new LocalStrings();
// UTF8 sequence for an arrow triangle pointing down.
kExpandedArrow = "\u25BE";
// UTF8 sequence for an arrow triangle pointing right.
kCollapsedArrow = "\u25B8";
/**
* Requests the list of sessions from the backend.
*/
function requestSessions() {
chrome.send('requestSessionList', [])
}
/**
* Expands or collapses the specified list.
*/
function toggleExpandedState(div) {
if (div.textContent.indexOf(kExpandedArrow) != -1) {
div.textContent = div.textContent.replace(kExpandedArrow, kCollapsedArrow);
div.parentNode.querySelector(".indent").hidden = true;
} else {
div.textContent = div.textContent.replace(kCollapsedArrow, kExpandedArrow);
div.parentNode.querySelector(".indent").hidden = false;
}
}
/**
* Creates a div element to serve as an expandable/collapsable
* title for a list of windows or tabs.
*/
function createTitleDiv(className, textContent) {
var div = document.createElement('div');
div.className = className + ' expandable';
div.textContent = kExpandedArrow + ' ' + textContent;
div.onclick = Function('toggleExpandedState(this)');
return div;
}
/**
* Utility function to call |transformFn| on each element of |from|
* and add them to a div which is then added to |container|.
*/
function addItems(container, from, transformFn) {
var divBlock = document.createElement('div');
divBlock.className = 'indent';
for (var i = 0; i < from.length; i++) {
divBlock.appendChild(transformFn(from[i]));
}
container.appendChild(divBlock);
}
/**
* Transforms a tab into an HTML element.
*/
function transformTab(tab) {
var tabItem = document.createElement('a');
tabItem.setAttribute('href', tab.url);
tabItem.textContent = tab.title;
tabItem.className = 'tab-link';
tabItem.style.backgroundImage = url('chrome://favicon/' + tab.url);
return tabItem;
}
/**
* Transforms a window into an HTML element.
*/
function transformWindow(window) {
var windowDiv = document.createElement('div');
windowDiv.className = "window";
windowDiv.appendChild(createTitleDiv('window-title', 'Window'));
addItems(windowDiv, window.tabs, transformTab);
return windowDiv;
}
/**
* Transforms a session into an HTML element.
*/
function transformSession(session) {
var sessionDiv = document.createElement('div');
var sessionName = session.name.length == 0 ? 'Session' : session.name;
sessionDiv.className = "session";
sessionDiv.appendChild(createTitleDiv('session-title', sessionName));
addItems(sessionDiv, session.windows, transformWindow);
return sessionDiv;
}
/**
* Creates the UI for the sessions tree.
*/
function createSessionTreeUI(sessionList) {
$('sessions-summary-text').textContent =
localStrings.getStringF('sessionsCountFormat', sessionList.length);
var sessionSection = $('session-list');
// Clear any previous list.
sessionSection.textContent = '';
var sectionDiv = document.createElement('div');
addItems(sectionDiv, sessionList, transformSession);
sessionSection.appendChild(sectionDiv);
$('no-sessions').hidden = sessionList.length != 0;
}
/**
* Creates the UI for the "magic" list.
*/
function createMagicListUI(magicList) {
$('magic-summary-text').textContent =
localStrings.getStringF('magicCountFormat', magicList.length);
var magicSection = $('magic-list');
// Clear any previous list.
magicSection.textContent = '';
var sectionDiv = document.createElement('div');
addItems(sectionDiv, magicList, transformTab);
magicSection.appendChild(sectionDiv);
$('no-magic').hidden = magicList.length != 0;
}
/**
* Callback from backend with the list of sessions. Builds the UI.
* @param {array} sessionList The list of sessions.
* @param {array} magicList List of "interesting" tabs.
*/
function updateSessionList(sessionList, magicList) {
createSessionTreeUI(sessionList);
createMagicListUI(magicList);
}
document.addEventListener('DOMContentLoaded', requestSessions);
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