107 lines
3 KiB
JavaScript
107 lines
3 KiB
JavaScript
// Copyright (c) 2012 Web Notes Technologies Pvt Ltd (http://erpnext.com)
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//
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// MIT License (MIT)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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// OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// library to mange assets (js, css, models, html) etc in the app.
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// will try and get from localStorge if latest are available
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// or will load them via xmlhttp
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// depends on wn.versions to manage versioning
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wn.assets = {
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// keep track of executed assets
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executed_ : {},
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// check if the asset exists in
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// localstorage
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exists: function(src) {
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if('localStorage' in window
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&& localStorage.getItem(src))
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return true
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},
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// add the asset to
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// localstorage
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add: function(src, txt) {
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if('localStorage' in window) {
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localStorage.setItem(src, txt);
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}
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},
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get: function(src) {
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return localStorage.getItem(src);
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},
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extn: function(src) {
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if(src.indexOf('?')!=-1) {
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src = src.split('?').slice(-1)[0];
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}
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return src.split('.').slice(-1)[0];
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},
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// load an asset via
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// xmlhttp
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load: function(src) {
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// this is virtual page load, only get the the source
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// *without* the template
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var t = src;
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wn.xmlhttp.get(t, function(txt) {
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// add it to localstorage
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wn.assets.add(src, txt);
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}, 'q=' + Math.floor(Math.random()*1000) , false)
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},
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// pass on to the handler to set
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execute: function(src) {
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if(!wn.assets.exists(src)) {
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wn.assets.load(src);
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}
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var type = wn.assets.extn(src);
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if(wn.assets.handler[type]) {
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wn.assets.handler[type](wn.assets.get(src), src);
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wn.assets.executed_[src] = 1;
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}
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},
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// handle types of assets
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// and launch them in the
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// app
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handler: {
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js: function(txt, src) {
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wn.dom.eval(txt);
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},
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css: function(txt, src) {
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var se = document.createElement('style');
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se.type = "text/css";
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if (se.styleSheet) {
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se.styleSheet.cssText = txt;
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} else {
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se.appendChild(document.createTextNode(txt));
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}
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document.getElementsByTagName('head')[0].appendChild(se);
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},
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cgi: function(txt, src) {
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// dynamic content, will return content as
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// javascript
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wn.dom.eval(txt)
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}
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}
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}
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