| New file |
|---|
| 0,0 → 1,57 |
|---|
| L.DeferredLayer = L.LayerGroup.extend({ |
| options: { |
| js: [], |
| init: null |
| }, |
| |
| _script_cache: {}, |
| |
| initialize: function(options) { |
| L.Util.setOptions(this, options); |
| L.LayerGroup.prototype.initialize.apply(this); |
| this._loaded = false; |
| }, |
| |
| onAdd: function(map) { |
| L.LayerGroup.prototype.onAdd.apply(this, [map]); |
| if (this._loaded) return; |
| //console.info("Script cache", this._script_cache); |
| var loaded = function() { |
| //console.info("Loaded", this, this.options); |
| this._loaded = true; |
| var l = this.options.init(); |
| if (l) |
| this.addLayer(l); |
| } |
| this._loadScripts(this.options.js.reverse(), L.Util.bind(loaded, this)); |
| }, |
| |
| _loadScripts: function(scripts, cb, args) { |
| if (!scripts || scripts.length == 0) |
| return cb(args); |
| var _this = this, s = scripts.pop(), c; |
| c = this._script_cache[s]; |
| if (c === undefined) { |
| c = {url: s, wait: []}; |
| //console.info("Load ", s); |
| var script = document.createElement('script'); |
| script.src = s; |
| script.type = 'text/javascript'; |
| script.onload = function () { |
| //console.info("Element(cb)", c.e.readyState); |
| c.e.readyState = "completed"; |
| var i = 0; |
| for (i = 0; i < c.wait.length; i++) |
| c.wait[i](); |
| } |
| c.e = script; |
| document.getElementsByTagName('head')[0].appendChild(script); |
| } |
| function _cb() { _this._loadScripts(scripts, cb, args); } |
| c.wait.push(_cb); |
| //console.info("Element", c.e.readyState); |
| if (c.e.readyState == "completed") |
| _cb(); |
| this._script_cache[s] = c; |
| } |
| }); |