/* DynAPI Distribution Dynamic Loading extension to dynapi.library The DynAPI Distribution is distributed under the terms of the GNU LGPL license. */ // begin loading the object DynAPILibrary.prototype.load = function(n,fn) { var list = this._queue(n,null,arguments[2]); //return dynapi.debug.print('going to load: '+list); if (list.length) { var s,src; for (var i=0;i<list.length;i++) { src = list[i]; s = this.scripts[list[i]]; if (i==list.length-1 && fn!=null) s.fn = fn; this.loadList[this.loadList.length] = src; } this._load(); } else if (fn) fn(); }; // reload the object DynAPILibrary.prototype.reload = function(n,fn,force) { var s = this.objects[n]; if (s) { s.loaded = false; this.load(n,fn,force); } }; // load a script that is not added to the library DynAPILibrary.prototype.loadScript = function(src,fn) { if (!this.scripts[src]) { var n = 'unnamed'+this._c++; s = this.add(n,src); // generate a name for the script s.unnamed = true; s.fn = null; s.dep = []; this.load(n,fn); } }; // reload a script DynAPILibrary.prototype.reloadScript = function(src,fn,force) { var s=this.scripts[src]; if(s) this.load(s.objects[0],fn,force); } // inserts the script element into the page DynAPILibrary.prototype._load = function() { if (this.busy) return; // dynapi.debug.print('Library Warning: busy'); else { if (this.loadIndex<this.loadList.length-1) { this.busy = true; this.loadIndex++; var src = this.loadList[this.loadIndex]; //if (!confirm('load: '+src+' ?')) return; var rsrc = src + '?'+Math.random(); // random ensures cached files are not loaded var s = this.scripts[src]; if (dynapi.ua.ns4) { // delete the constructors for (var j=0;j<s.objects.length;j++) { var n = s.objects[j]; if (dynapi.frame[n]) { dynapi.frame[n] = null; if (s.pkg) dynapi.frame[s.pkg+'.'+n] = null; } } //NS4 does not like "/" inside the ?name=value src=src.replace(/\//g,'+'); //substitute "/" for "+" this.elm.src = dynapi._path+'ext/library.html?js='+src; } else if (dynapi.ua.ie && (dynapi.ua.v==4 || dynapi.ua.mac)) { dynapi.frame.document.body.insertAdjacentHTML('beforeEnd','<script type="text/javascript" language="javascript" src="'+rsrc+'" defer><\/script>'); this._export(src); } else { var elm = s.elm = dynapi.frame.document.createElement('script'); elm.src = rsrc; elm.type = 'text/javascript'; elm.defer = true; if (dynapi.ua.ie) { elm.C = 0; var o = this; elm.onreadystatechange = function() { elm.C++; if (elm.C==2 || elm.readyState=="complete") { // use 2nd statechange for onload o._export(src); } } } dynapi.frame.document.getElementsByTagName('head')[0].appendChild(elm); // I could not find way to know when the script is complete in Moz v0.9.3 if (dynapi.ua.ns6) setTimeout(this+'._export("'+src+'")',100); } } } }; // executed after a script is finished loading, run main() functions DynAPILibrary.prototype._export = function(src) { var src = this.loadList[this.loadIndex]; var s = this.scripts[src]; if (s) { this._register(s); // run elm.main)() before global main() if (dynapi.ua.ns4 && typeof(this.elm.main)=="function") { this.elm.main(); this.elm.main = null; } // run global main() if available if (typeof(main)=="function") { main(); main = null; } // clear out all functions in the layer's scope if (dynapi.ua.ns4) { for (var i in this.elm) { if (typeof(this.elm[i])=="function") delete this.elm[i]; } } this.busy = false; // load next file this._load(); } //else return alert('Library Error: unknown script '+src); }; // registers the script as loaded, exports the objects DynAPILibrary.prototype._register = function(s) { //dynapi.debug.print('loaded "'+s.src+'"'); s.loaded = true; s.queued = false; if (!s.unnamed) { var n,found; // loop through each object that the script contains for (var i=0;i<s.objects.length;i++) { found = false; n = s.objects[i]; // scope local objects in the layer to the DynAPI frame if (dynapi.ua.ns4 && this.elm && typeof(this.elm[n])!="undefined") { dynapi.frame[n] = this.elm[n]; found = true; } else if (typeof(dynapi.frame[n])!="undefined") found = true; else if (n.indexOf('.')>0) { var ns = n.split('.'), o = dynapi.frame, b = false; for (var j=0;j<ns.length;j++) { o = o[ns[j]]; } if (typeof(o)!="undefined") found = true; } else if (typeof(dynapi[n])!="undefined") found = true; if (found) { if (s.pkg) { // make package link: dynapi.api.DynLayer = DynLayer if (s.pkg!="dynapi") this.packages[s.pkg][n] = dynapi.frame[n]; n = s.pkg+'.'+n; } dynapi.debug.print('loaded ['+n+']'); } else { dynapi.debug.print('Library Error: could not find ['+n+']'); } } } // run handler if available if (s.fn) { s.fn(); delete s.fn; } }; // called from /lib/dynapi/library.html to write the <script>, NS4 only DynAPILibrary.prototype._handleLoad = function(elm) { var args = dynapi.functions.getURLArguments(elm.src); var js = args["js"]; if (js) { js=js.replace(/\+/g,'/'); // convert + to / if (js.indexOf('http')!=0) { var l = dynapi.frame.document.location; if (js.substr(0,1)=='/') js = l.port+'//'+host+src; else js = dynapi.documentPath+js; } elm.document.write('<script type="text/javascript" language="JavaScript" src="'+js+'?r'+Math.random()+'"><\/script>'); elm.document.close(); elm.onload = function() { dynapi.library._export(js); } } }; // inserts the layer for NS4, register included scripts DynAPILibrary.prototype._create = function() { // ensure a previous main function is wiped out if (typeof(main)=="function") main = null; // register objects from scripts included by dynapi.library.include() or manually var s,n; for (var i in this.scripts) { s = this.scripts[i]; n=s.objects[0]; if(s.pkg=='dynapi.functions') { // used to avoid conflicts with intrinsic objects such as String, Image, Date and Math objects if(dynapi.functions[n]) this._register(s); } else if (s.loaded || (s.objects[0] && dynapi.frame[s.objects[0]])) this._register(s); } // create NS4 layer to load scripts into if (dynapi.ua.ns4) this.elm = new Layer(0, dynapi.frame); this.busy = false; // load any scripts before proceeding if (this.loadList.length) { var s = this.scripts[this.loadList[this.loadList.length-1]]; s.fn = function() { setTimeout('dynapi._onLoad()',1); } this._load(); } else setTimeout('dynapi._onLoad()',1); };