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/*
* Copyright 2014,2015 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
ONOS GUI -- Util -- Theme Service
*/
(function () {
'use strict';
var $log, fs;
var themes = ['light', 'dark'],
themeStr = themes.join(' '),
thidx,
listeners = {},
nextListenerId = 1;
function init() {
thidx = 0;
updateBodyClass();
}
function getTheme() {
return themes[thidx];
}
function setTheme(t) {
var idx = themes.indexOf(t);
if (idx > -1 && idx !== thidx) {
thidx = idx;
updateBodyClass();
themeEvent('set');
}
}
function toggleTheme() {
var i = thidx + 1;
thidx = (i===themes.length) ? 0 : i;
updateBodyClass();
themeEvent('toggle');
return getTheme();
}
function updateBodyClass() {
var body = d3.select('body');
body.classed(themeStr, false);
body.classed(getTheme(), true);
}
function themeEvent(w) {
var t = getTheme(),
m = 'Theme-Change-('+w+'): ' + t;
$log.debug(m);
angular.forEach(listeners, function(value) {
value.cb(
{
event: 'themeChange',
value: t
}
);
});
}
function addListener(callback) {
var id = nextListenerId++,
cb = fs.isF(callback),
o = { id: id, cb: cb };
if (cb) {
listeners[id] = o;
} else {
$log.error('ThemeService.addListener(): callback not a function');
o.error = 'No callback defined';
}
return o;
}
function removeListener(lsnr) {
var id = lsnr && lsnr.id,
o = listeners[id];
if (o) {
delete listeners[id];
}
}
angular.module('onosUtil')
.factory('ThemeService', ['$log', 'FnService',
function (_$log_, _fs_) {
$log = _$log_;
fs = _fs_;
thidx = 0;
return {
init: init,
theme: function (x) {
if (x === undefined) {
return getTheme();
} else {
setTheme(x);
}
},
toggleTheme: toggleTheme,
addListener: addListener,
removeListener: removeListener
};
}]);
}());
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