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// Copyright (c) 2010 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.
cr.define('options', function() {
/////////////////////////////////////////////////////////////////////////////
// OptionsPage class:
/**
* Base class for options page.
* @constructor
* @param {string} name Options page name, also defines id of the div element
* containing the options view and the name of options page navigation bar
* item as name+'PageNav'.
* @param {string} title Options page title, used for navigation bar
* @extends {EventTarget}
*/
function OptionsPage(name, title, pageDivName) {
this.name = name;
this.title = title;
this.pageDivName = pageDivName;
this.pageDiv = $(this.pageDivName);
this.tab = null;
this.managed = false;
}
OptionsPage.registeredPages_ = {};
/**
* Pages which are meant to have an entry in the nav, but
* not have a permanent entry.
*/
OptionsPage.registeredSubPages_ = {};
/**
* Pages which are meant to behave like modal dialogs.
*/
OptionsPage.registeredOverlayPages_ = {};
/**
* Shows a registered page.
* @param {string} pageName Page name.
*/
OptionsPage.showPageByName = function(pageName) {
for (var name in OptionsPage.registeredPages_) {
var page = OptionsPage.registeredPages_[name];
page.visible = name == pageName;
}
};
/**
* Called on load. Dispatch the URL hash to the given page's handleHash
* function.
* @param {string} pageName The string name of the (registered) options page.
* @param {string} hash The value of the hash component of the URL.
*/
OptionsPage.handleHashForPage = function(pageName, hash) {
OptionsPage.registeredPages_[pageName].handleHash(hash);
};
/**
* Shows a registered Overlay page.
* @param {string} overlayName Page name.
*/
OptionsPage.showOverlay = function(overlayName) {
if (OptionsPage.registeredOverlayPages_[overlayName]) {
OptionsPage.registeredOverlayPages_[overlayName].visible = true;
}
};
/**
* Clears overlays (i.e. hide all overlays).
*/
OptionsPage.clearOverlays = function() {
for (var name in OptionsPage.registeredOverlayPages_) {
var page = OptionsPage.registeredOverlayPages_[name];
page.visible = false;
}
};
/**
* Clears overlays if the key event is ESC.
* @param {Event} e Key event.
* @private
*/
OptionsPage.clearOverlaysOnEsc_ = function(e) {
if (e.keyCode == 27) { // Esc
OptionsPage.clearOverlays();
}
};
/**
* Shows the tab contents for the given navigation tab.
* @param {!Element} tab The tab that the user clicked.
*/
OptionsPage.showTab = function(tab) {
if (!tab.classList.contains('inactive-tab'))
return;
if (this.activeNavTab != null) {
this.activeNavTab.classList.remove('active-tab');
$(this.activeNavTab.getAttribute('tab-contents')).classList.
remove('active-tab-contents');
}
tab.classList.add('active-tab');
$(tab.getAttribute('tab-contents')).classList.add('active-tab-contents');
this.activeNavTab = tab;
}
/**
* Registers new options page.
* @param {OptionsPage} page Page to register.
*/
OptionsPage.register = function(page) {
OptionsPage.registeredPages_[page.name] = page;
// Create and add new page <li> element to navbar.
var pageNav = document.createElement('li');
pageNav.id = page.name + 'PageNav';
pageNav.className = 'navbar-item';
pageNav.setAttribute('pageName', page.name);
pageNav.textContent = page.title;
pageNav.tabIndex = 0;
pageNav.onclick = function(event) {
OptionsPage.showPageByName(this.getAttribute('pageName'));
};
pageNav.onkeypress = function(event) {
// Enter or space
if (event.keyCode == 13 || event.keyCode == 32) {
OptionsPage.showPageByName(this.getAttribute('pageName'));
}
};
var navbar = $('navbar');
navbar.appendChild(pageNav);
page.tab = pageNav;
page.initializePage();
};
/**
* Registers a new Sub tab page.
* @param {OptionsPage} page Page to register.
*/
OptionsPage.registerSubPage = function(page) {
OptionsPage.registeredPages_[page.name] = page;
var pageNav = document.createElement('li');
pageNav.id = page.name + 'PageNav';
pageNav.className = 'navbar-item hidden';
pageNav.setAttribute('pageName', page.name);
pageNav.textContent = page.title;
var subpagesnav = $('subpagesnav');
subpagesnav.appendChild(pageNav);
page.tab = pageNav;
page.initializePage();
};
/**
* Registers a new Overlay page.
* @param {OptionsPage} page Page to register, must be a class derived from
* OptionsPage.
*/
OptionsPage.registerOverlay = function(page) {
OptionsPage.registeredOverlayPages_[page.name] = page;
page.tab = undefined;
page.isOverlay = true;
page.initializePage();
};
/**
* Callback for window.onpopstate.
* @param {Object} data State data pushed into history.
*/
OptionsPage.setState = function(data) {
if (data && data.pageName) {
OptionsPage.showPageByName(data.pageName);
}
};
/**
* Initializes the complete options page. This will cause
* all C++ handlers to be invoked to do final setup.
*/
OptionsPage.initialize = function() {
chrome.send('coreOptionsInitialize');
};
OptionsPage.prototype = {
__proto__: cr.EventTarget.prototype,
/**
* Initializes page content.
*/
initializePage: function() {},
/**
* Sets managed banner visibility state.
*/
setManagedBannerVisibility: function(visible) {
this.managed = visible;
if (this.visible) {
$('managed-prefs-banner').style.display = visible ? 'block' : 'none';
}
},
/**
* Gets page visibility state.
*/
get visible() {
var page = $(this.pageDivName);
return page && page.ownerDocument.defaultView.getComputedStyle(
page).display == 'block';
},
/**
* Sets page visibility.
*/
set visible(visible) {
if ((this.visible && visible) || (!this.visible && !visible))
return;
if (visible) {
this.pageDiv.style.display = 'block';
if (this.isOverlay) {
var overlay = $('overlay');
overlay.classList.remove('hidden');
document.addEventListener('keydown',
OptionsPage.clearOverlaysOnEsc_);
} else {
var banner = $('managed-prefs-banner');
banner.style.display = this.managed ? 'block' : 'none';
// Recent webkit change no longer allows url change from "chrome://".
window.history.pushState({pageName: this.name},
this.title);
}
if (this.tab) {
this.tab.classList.add('navbar-item-selected');
if (this.tab.parentNode && this.tab.parentNode.id == 'subpagesnav')
this.tab.classList.remove('hidden');
}
} else {
if (this.isOverlay) {
var overlay = $('overlay');
overlay.classList.add('hidden');
document.removeEventListener('keydown',
OptionsPage.clearOverlaysOnEsc_);
}
this.pageDiv.style.display = 'none';
if (this.tab) {
this.tab.classList.remove('navbar-item-selected');
if (this.tab.parentNode && this.tab.parentNode.id == 'subpagesnav')
this.tab.classList.add('hidden');
}
}
cr.dispatchPropertyChange(this, 'visible', visible, !visible);
},
/**
* Handles a hash value in the URL (such as bar in
* chrome://options/foo#bar). Called on page load. By default, this shows
* an overlay that matches the hash name, but can be overriden by individual
* OptionsPage subclasses to get other behavior.
* @param {string} hash The hash value.
*/
handleHash: function(hash) {
OptionsPage.showOverlay(hash);
},
};
// Export
return {
OptionsPage: OptionsPage
};
});
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