[5911] | 1 | /** |
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| 2 | * @name Lazy |
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| 3 | * @descripton Lazy is Jquery plugin that lazy loads Jquery plugins |
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| 4 | * @version 1.5 |
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| 5 | * @requires Jquery 1.2.6+ |
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| 6 | * @author Jan Jarfalk jan.jarfalk@unwrongest.com |
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| 7 | * |
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| 8 | * @param {String} src Path to the plugin you want to load |
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| 9 | * @param {String} name Function name of the plugin |
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| 10 | * @param {Hash} dependencies Hash with the keys js and css |
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| 11 | * @param {Array} js Array of paths to javascript dependencies |
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| 12 | * @param {Array} css Array of paths to css dependencies |
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| 13 | * @param {Bool} cache Enable or disable caching |
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| 14 | */ |
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| 15 | |
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| 16 | (function($) { |
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| 17 | |
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| 18 | $.lazy = function(options) |
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| 19 | { |
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| 20 | |
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| 21 | // Handle string name |
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| 22 | if(typeof options.name == 'string'){ |
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| 23 | options.name = [options.name]; |
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| 24 | } |
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| 25 | |
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| 26 | $.each(options.name, function(i){ |
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| 27 | |
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| 28 | // Create local variables |
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| 29 | var src = options.src, |
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| 30 | name = options.name[i], |
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| 31 | cache = options.cache || true, |
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| 32 | isFunction = options.isFunction || true, |
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| 33 | isMethod = options.isMethod || true, |
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| 34 | self, arg, object = {}; |
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| 35 | |
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| 36 | // Add plugin to the archive |
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| 37 | $.lazy.archive[src] = {'status':'unloaded','que':[]}; |
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| 38 | |
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| 39 | |
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| 40 | // Add a CSS file to the document |
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| 41 | function loadCSS(src,callback,self,name,arg){ |
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| 42 | |
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| 43 | $.lazy.archive[src].status = "loading"; |
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| 44 | |
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| 45 | var node = document.createElement('link'); |
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| 46 | node.type = 'text/css'; |
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| 47 | node.rel = 'stylesheet'; |
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| 48 | node.href = src; |
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| 49 | node.media = 'screen'; |
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| 50 | document.getElementsByTagName("head")[0].appendChild(node); |
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| 51 | |
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| 52 | $.lazy.archive[src].status = 'loaded'; |
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| 53 | |
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| 54 | if(callback) |
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| 55 | callback(self,name,arg); |
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| 56 | } |
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| 57 | |
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| 58 | // Add a JS file to the document |
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| 59 | function loadJS(src,callback,self,name,arg){ |
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| 60 | |
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| 61 | $.lazy.archive[src].status = "loading"; |
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| 62 | |
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| 63 | $.ajax({ |
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| 64 | type: "GET", |
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| 65 | url: src, |
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| 66 | cache: cache, |
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| 67 | dataType: "script", |
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| 68 | success: function(){ |
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| 69 | $.lazy.archive[src].status = 'loaded'; |
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| 70 | if(callback) { |
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| 71 | callback(self,name,arg); |
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| 72 | } |
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| 73 | } |
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| 74 | }); |
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| 75 | |
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| 76 | } |
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| 77 | |
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| 78 | // Wrapper for loadJS for the actual plugin file |
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| 79 | function loadPlugin(self, name, arg){ |
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| 80 | |
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| 81 | function callback(){ |
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| 82 | if(typeof self == 'object'){ |
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| 83 | if(arg.length > 0){ |
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| 84 | $(self)[name].apply(self,arg); |
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| 85 | } else { |
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| 86 | $(self)[name](); |
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| 87 | } |
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| 88 | } else { |
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| 89 | $[name].apply(null,arg); |
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| 90 | } |
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| 91 | |
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| 92 | $.each($.lazy.archive[src].que,function(i){ |
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| 93 | var queItem = $.lazy.archive[src].que[i]; |
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| 94 | object[queItem.name].apply(queItem.self,queItem.arguments); |
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| 95 | }); |
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| 96 | $.lazy.archive[src].que = []; |
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| 97 | } |
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| 98 | |
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| 99 | loadJS(src,callback,self,name,arg); |
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| 100 | } |
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| 101 | |
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| 102 | // Proxy function |
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| 103 | function proxy() { |
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| 104 | |
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| 105 | var self = this; |
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| 106 | arg = arguments; |
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| 107 | |
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| 108 | if( $.lazy.archive[src].status === 'loaded' ) { |
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| 109 | |
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| 110 | $.each(this,function(){ |
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| 111 | $(this)[name].apply(self,arg); |
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| 112 | }); |
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| 113 | |
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| 114 | } else if ( $.lazy.archive[src].status === 'loading' ) { |
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| 115 | |
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| 116 | $.lazy.archive[src].que.push({'name':name,'self':self,'arguments':arg}); |
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| 117 | |
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| 118 | } else { |
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| 119 | |
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| 120 | $.lazy.archive[src].status = 'loading'; |
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| 121 | |
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| 122 | if ( options.dependencies ) { |
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| 123 | |
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| 124 | var css = options.dependencies.css || [], |
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| 125 | js = options.dependencies.js || []; |
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| 126 | |
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| 127 | var total = css.length + js.length; |
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| 128 | |
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| 129 | function loadDependencies(array, callback, callbackCallback){ |
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| 130 | |
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| 131 | var length = array.length, |
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| 132 | src; |
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| 133 | |
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| 134 | array = array.reverse(); |
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| 135 | |
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| 136 | while( length-- && total-- ){ |
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| 137 | |
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| 138 | |
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| 139 | src = array[length]; |
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| 140 | |
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| 141 | if(typeof $.lazy.archive[src] == 'undefined') { |
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| 142 | $.lazy.archive[src] = {'status':'unloaded','que':[]}; |
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| 143 | } |
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| 144 | |
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| 145 | if($.lazy.archive[src].status === 'unloaded'){ |
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| 146 | |
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| 147 | if(!total) { |
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| 148 | |
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| 149 | callback(src,function(){ |
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| 150 | loadPlugin(self,name,arg); |
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| 151 | }); |
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| 152 | |
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| 153 | } else { |
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| 154 | |
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| 155 | callback(src); |
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| 156 | |
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| 157 | } |
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| 158 | |
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| 159 | } else if( !total ) { |
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| 160 | |
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| 161 | loadPlugin(self,name,arg); |
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| 162 | |
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| 163 | } |
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| 164 | } |
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| 165 | } |
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| 166 | |
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| 167 | loadDependencies(css, loadCSS); |
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| 168 | loadDependencies(js, loadJS); |
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| 169 | |
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| 170 | } else { |
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| 171 | loadPlugin(self,name,arg); |
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| 172 | |
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| 173 | } |
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| 174 | } |
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| 175 | |
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| 176 | return this; |
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| 177 | }; |
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| 178 | |
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| 179 | object[name] = proxy; |
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| 180 | |
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| 181 | // Attach Methods to jQuery.fn object |
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| 182 | if(isMethod){ |
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| 183 | jQuery.fn.extend(object); |
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| 184 | } |
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| 185 | |
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| 186 | // Attach Function to jQuery object |
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| 187 | if(isFunction){ |
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| 188 | jQuery.extend(object); |
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| 189 | } |
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| 190 | }); |
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| 191 | }; |
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| 192 | |
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| 193 | $.lazy.archive = {}; |
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| 194 | |
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| 195 | })(jQuery); |
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