mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-11-26 18:03:39 +01:00
233 lines
6.5 KiB
JavaScript
233 lines
6.5 KiB
JavaScript
/*
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DynAPI Distribution
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Dynamic Loading extension to dynapi.library
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The DynAPI Distribution is distributed under the terms of the GNU LGPL license.
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*/
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// begin loading the object
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DynAPILibrary.prototype.load = function(n,fn) {
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var list = this._queue(n,null,arguments[2]);
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//return dynapi.debug.print('going to load: '+list);
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if (list.length) {
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var s,src;
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for (var i=0;i<list.length;i++) {
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src = list[i];
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s = this.scripts[list[i]];
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if (i==list.length-1 && fn!=null) s.fn = fn;
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this.loadList[this.loadList.length] = src;
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}
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this._load();
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}
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else if (fn) fn();
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};
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// reload the object
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DynAPILibrary.prototype.reload = function(n,fn,force) {
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var s = this.objects[n];
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if (s) {
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s.loaded = false;
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this.load(n,fn,force);
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}
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};
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// load a script that is not added to the library
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DynAPILibrary.prototype.loadScript = function(src,fn) {
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if (!this.scripts[src]) {
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var n = 'unnamed'+this._c++;
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s = this.add(n,src); // generate a name for the script
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s.unnamed = true;
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s.fn = null;
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s.dep = [];
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this.load(n,fn);
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}
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};
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// reload a script
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DynAPILibrary.prototype.reloadScript = function(src,fn,force) {
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var s=this.scripts[src];
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if(s) this.load(s.objects[0],fn,force);
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}
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// inserts the script element into the page
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DynAPILibrary.prototype._load = function() {
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if (this.busy) return; // dynapi.debug.print('Library Warning: busy');
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else {
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if (this.loadIndex<this.loadList.length-1) {
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this.busy = true;
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this.loadIndex++;
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var src = this.loadList[this.loadIndex];
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//if (!confirm('load: '+src+' ?')) return;
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var rsrc = src + '?'+Math.random(); // random ensures cached files are not loaded
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var s = this.scripts[src];
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if (dynapi.ua.ns4) {
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// delete the constructors
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for (var j=0;j<s.objects.length;j++) {
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var n = s.objects[j];
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if (dynapi.frame[n]) {
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dynapi.frame[n] = null;
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if (s.pkg) dynapi.frame[s.pkg+'.'+n] = null;
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}
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}
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//NS4 does not like "/" inside the ?name=value
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src=src.replace(/\//g,'+'); //substitute "/" for "+"
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this.elm.src = dynapi._path+'ext/library.html?js='+src;
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}
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else if (dynapi.ua.ie && (dynapi.ua.v==4 || dynapi.ua.mac)) {
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dynapi.frame.document.body.insertAdjacentHTML('beforeEnd','<script type="text/javascript" language="javascript" src="'+rsrc+'" defer><\/script>');
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this._export(src);
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}
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else {
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var elm = s.elm = dynapi.frame.document.createElement('script');
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elm.src = rsrc;
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elm.type = 'text/javascript';
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elm.defer = true;
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if (dynapi.ua.ie) {
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elm.C = 0;
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var o = this;
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elm.onreadystatechange = function() {
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elm.C++;
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if (elm.C==2 || elm.readyState=="complete") { // use 2nd statechange for onload
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o._export(src);
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}
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}
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}
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dynapi.frame.document.getElementsByTagName('head')[0].appendChild(elm);
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// I could not find way to know when the script is complete in Moz v0.9.3
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if (dynapi.ua.ns6) setTimeout(this+'._export("'+src+'")',100);
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}
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}
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}
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};
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// executed after a script is finished loading, run main() functions
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DynAPILibrary.prototype._export = function(src) {
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var src = this.loadList[this.loadIndex];
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var s = this.scripts[src];
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if (s) {
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this._register(s);
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// run elm.main)() before global main()
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if (dynapi.ua.ns4 && typeof(this.elm.main)=="function") {
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this.elm.main();
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this.elm.main = null;
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}
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// run global main() if available
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if (typeof(main)=="function") {
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main();
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main = null;
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}
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// clear out all functions in the layer's scope
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if (dynapi.ua.ns4) {
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for (var i in this.elm) {
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if (typeof(this.elm[i])=="function") delete this.elm[i];
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}
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}
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this.busy = false;
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// load next file
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this._load();
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}
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//else return alert('Library Error: unknown script '+src);
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};
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// registers the script as loaded, exports the objects
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DynAPILibrary.prototype._register = function(s) {
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//dynapi.debug.print('loaded "'+s.src+'"');
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s.loaded = true;
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s.queued = false;
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if (!s.unnamed) {
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var n,found;
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// loop through each object that the script contains
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for (var i=0;i<s.objects.length;i++) {
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found = false;
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n = s.objects[i];
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// scope local objects in the layer to the DynAPI frame
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if (dynapi.ua.ns4 && this.elm && typeof(this.elm[n])!="undefined") {
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dynapi.frame[n] = this.elm[n];
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found = true;
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}
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else if (typeof(dynapi.frame[n])!="undefined") found = true;
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else if (n.indexOf('.')>0) {
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var ns = n.split('.'), o = dynapi.frame, b = false;
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for (var j=0;j<ns.length;j++) {
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o = o[ns[j]];
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}
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if (typeof(o)!="undefined") found = true;
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}
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else if (typeof(dynapi[n])!="undefined") found = true;
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if (found) {
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if (s.pkg) {
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// make package link: dynapi.api.DynLayer = DynLayer
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if (s.pkg!="dynapi") this.packages[s.pkg][n] = dynapi.frame[n];
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n = s.pkg+'.'+n;
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}
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dynapi.debug.print('loaded ['+n+']');
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}
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else {
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dynapi.debug.print('Library Error: could not find ['+n+']');
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}
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}
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}
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// run handler if available
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if (s.fn) {
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s.fn();
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delete s.fn;
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}
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};
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// called from /lib/dynapi/library.html to write the <script>, NS4 only
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DynAPILibrary.prototype._handleLoad = function(elm) {
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var args = dynapi.functions.getURLArguments(elm.src);
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var js = args["js"];
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if (js) {
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js=js.replace(/\+/g,'/'); // convert + to /
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if (js.indexOf('http')!=0) {
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var l = dynapi.frame.document.location;
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if (js.substr(0,1)=='/') js = l.port+'//'+host+src;
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else js = dynapi.documentPath+js;
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}
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elm.document.write('<script type="text/javascript" language="JavaScript" src="'+js+'?r'+Math.random()+'"><\/script>');
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elm.document.close();
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elm.onload = function() {
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dynapi.library._export(js);
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}
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}
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};
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// inserts the layer for NS4, register included scripts
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DynAPILibrary.prototype._create = function() {
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// ensure a previous main function is wiped out
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if (typeof(main)=="function") main = null;
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// register objects from scripts included by dynapi.library.include() or manually
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var s,n;
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for (var i in this.scripts) {
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s = this.scripts[i];
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n=s.objects[0];
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if(s.pkg=='dynapi.functions') { // used to avoid conflicts with intrinsic objects such as String, Image, Date and Math objects
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if(dynapi.functions[n]) this._register(s);
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}
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else if (s.loaded || (s.objects[0] && dynapi.frame[s.objects[0]])) this._register(s);
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}
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// create NS4 layer to load scripts into
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if (dynapi.ua.ns4) this.elm = new Layer(0, dynapi.frame);
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this.busy = false;
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// load any scripts before proceeding
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if (this.loadList.length) {
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var s = this.scripts[this.loadList[this.loadList.length-1]];
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s.fn = function() {
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setTimeout('dynapi._onLoad()',1);
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}
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this._load();
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}
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else setTimeout('dynapi._onLoad()',1);
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};
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