hostenv_adobesvg.js

dojo与json创建无限级树的时候,当在父结点下添加了一个新结点,我怎么让父亲结点重新调用json加载一下子结点内容.

		}else{
			if(!contents){ 
				next[1](false);
			}else{
				var deps = dojo.hostenv.getDepsForEval(next[2]);
				if(deps.length>0){
					eval(deps.join(";"));
				}else{
					dojo.hostenv.unwindUriStack();
				}
			}
		}
	}
	this.getText(uri, tcb, true);
}

/**
* loadModule("A.B") first checks to see if symbol A.B is defined. 
* If it is, it is simply returned (nothing to do).
* If it is not defined, it will look for "A/B.js" in the script root directory, followed
* by "A.js".
* It throws if it cannot find a file to load, or if the symbol A.B is not defined after loading.
* It returns the object A.B.
*
* This does nothing about importing symbols into the current package.
* It is presumed that the caller will take care of that. For example, to import
* all symbols:
*
*    with (dojo.hostenv.loadModule("A.B")) {
*       ...
*    }
*
* And to import just the leaf symbol:
*
*    var B = dojo.hostenv.loadModule("A.B");
*    ...
*
* dj_load is an alias for dojo.hostenv.loadModule
*/
dojo.hostenv.loadModule = function(modulename, exact_only, omit_module_check){
	// alert("dojo.hostenv.loadModule('"+modulename+"');");
	var module = this.findModule(modulename, 0);
	if(module){
		return module;
	}

	// dojo.debug("dojo.hostenv.loadModule('"+modulename+"');");

	// protect against infinite recursion from mutual dependencies
	if (typeof this.loading_modules_[modulename] !== 'undefined'){
		// NOTE: this should never throw an exception!! "recursive" includes
		// are normal in the course of app and module building, so blow out of
		// it gracefully, but log it in debug mode

		// dojo.raise("recursive attempt to load module '" + modulename + "'");
		dojo.debug("recursive attempt to load module '" + modulename + "'");
	}else{
		this.addedToLoadingCount.push(modulename);
	}
	this.loading_modules_[modulename] = 1;


	// convert periods to slashes
	var relpath = modulename.replace(/\./g, '/') + '.js';

	var syms = modulename.split(".");
	var nsyms = modulename.split(".");
	if(syms[0]=="dojo"){ // FIXME: need a smarter way to do this!
		syms[0] = "src"; 
	}
	var last = syms.pop();
	syms.push(last);
	// figure out if we're looking for a full package, if so, we want to do
	// things slightly diffrently
	var _this = this;
	var pfn = this.pkgFileName;
	if(last=="*"){
		modulename = (nsyms.slice(0, -1)).join('.');

		var module = this.findModule(modulename, 0);
		// dojo.debug("found: "+modulename+"="+module);
		if(module){
			_this.removedFromLoadingCount.push(modulename);
			return module;
		}

		var nextTry = function(lastStatus){
			if(lastStatus){ 
				module = _this.findModule(modulename, false); // pass in false so we can give better error
				if((!module)&&(syms[syms.length-1]!=pfn)){
					dojo.raise("Module symbol '" + modulename + "' is not defined after loading '" + relpath + "'"); 
				}
				if(module){
					_this.removedFromLoadingCount.push(modulename);
					dojo.hostenv.modulesLoaded();
					return;
				}
			}
			syms.pop();
			syms.push(pfn);
			// dojo.debug("syms: "+syms);
			relpath = syms.join("/") + '.js';
			if(relpath.charAt(0)=="/"){
				relpath = relpath.slice(1);
			}
			// dojo.debug("relpath: "+relpath);
			_this.loadPath(relpath, ((!omit_module_check) ? modulename : null), nextTry);
		}

		nextTry();
	}else{
		relpath = syms.join("/") + '.js';
		modulename = nsyms.join('.');

		var nextTry = function(lastStatus){
			// dojo.debug("lastStatus: "+lastStatus);
			if(lastStatus){ 
				// dojo.debug("inital relpath: "+relpath);
				module = _this.findModule(modulename, false); // pass in false so we can give better error
				// if(!module){
				if((!module)&&(syms[syms.length-1]!=pfn)){
					dojo.raise("Module symbol '" + modulename + "' is not defined after loading '" + relpath + "'"); 
				}
				if(module){
					_this.removedFromLoadingCount.push(modulename);
					dojo.hostenv.modulesLoaded();
					return;
				}
			}
			var setPKG = (syms[syms.length-1]==pfn) ? false : true;
			syms.pop();
			if(setPKG){
				syms.push(pfn);
			}
			relpath = syms.join("/") + '.js';
			if(relpath.charAt(0)=="/"){
				relpath = relpath.slice(1);
			}
			// dojo.debug("relpath: "+relpath);
			_this.loadPath(relpath, ((!omit_module_check) ? modulename : null), nextTry);
		}

		this.loadPath(relpath, ((!omit_module_check) ? modulename : null), nextTry);
	}
	return;
}

/**
 * Read the contents of the specified uri and return those contents.
 *
 * FIXME: Make sure this is consistent with other implementations of getText
 * @param uri A relative or absolute uri. If absolute, it still must be in the same "domain" as we are.
 * @param async_cb If not specified, returns false as synchronous is not
 * supported. If specified, load asynchronously, and use async_cb as the handler which receives the result of the request.
 * @param fail_ok Default false. If fail_ok and !async_cb and loading fails, return null instead of throwing.
 */ 
dojo.hostenv.async_cb = null;

dojo.hostenv.unWindGetTextStack = function(){
	if(dojo.hostenv.inFlightCount>0){
		setTimeout("dojo.hostenv.unWindGetTextStack()", 100);
		return;
	}
	// we serialize because this goddamned environment is too fucked up
	// to know how to do anything else
	dojo.hostenv.inFlightCount++;
	var next = dojo.hostenv.getTextStack.pop();
	if((!next)&&(dojo.hostenv.getTextStack.length==0)){ 
		dojo.hostenv.inFlightCount--;
		dojo.hostenv.async_cb = function(){};
		return;
	}
	dojo.hostenv.async_cb = next[1];
	// http = window.getURL(uri, dojo.hostenv.anon[cbn]);
	window.getURL(next[0], function(result){ 
		dojo.hostenv.inFlightCount--;
		dojo.hostenv.async_cb(result.content);
		dojo.hostenv.unWindGetTextStack();
	});
}

dojo.hostenv.getText = function(uri, async_cb, fail_ok){
	// dojo.debug("Calling getText()");
	try{
		if(async_cb){
			dojo.hostenv.getTextStack.push([uri, async_cb, fail_ok]);
			dojo.hostenv.unWindGetTextStack();
		}else{
			return dojo.raise("No synchronous XMLHTTP implementation available, for uri " + uri);
		}
	}catch(e){
		return dojo.raise("No XMLHTTP implementation available, for uri " + uri);
	}
}


/**
 * Makes an async post to the specified uri.
 *
 * FIXME: Not sure that we need this, but adding for completeness.
 * More details about the implementation of this are available at 
 * http://wiki.svg.org/index.php/PostUrl
 * @param uri A relative or absolute uri. If absolute, it still must be in the same "domain" as we are.
 * @param async_cb If not specified, returns false as synchronous is not
 * supported. If specified, load asynchronously, and use async_cb as the progress handler which takes the xmlhttp object as its argument. If async_cb, this function returns null.
 * @param text Data to post
 * @param fail_ok Default false. If fail_ok and !async_cb and loading fails, return null instead of throwing.
 * @param mime_type optional MIME type of the posted data (such as "text/plain")
 * @param encoding optional encoding for data. null, 'gzip' and 'deflate' are possible values. If browser does not support binary post this parameter is ignored.
 */ 
dojo.hostenv.postText = function(uri, async_cb, text, fail_ok, mime_type, encoding){
	var http = null;
	
	var async_callback = function(httpResponse){
		if (!httpResponse.success) {
			dojo.raise("Request for uri '" + uri + "' resulted in " + httpResponse.status);
		}
		
		if(!httpResponse.content) {
			if (!fail_ok) dojo.raise("Request for uri '" + uri + "' resulted in no content");
			return null;
		}
		// FIXME: wtf, I'm losing a reference to async_cb
		async_cb(httpResponse.content);
	}
	
	try {
		if(async_cb) {
			http = window.postURL(uri, text, async_callback, mimeType, encoding);
		} else {
		return dojo.raise("No synchronous XMLHTTP post implementation available, for uri " + uri);
		}
	} catch(e) {
		return dojo.raise("No XMLHTTP post implementation available, for uri " + uri);
	}
}

/*
 * It turns out that if we check *right now*, as this script file is being loaded,
 * then the last script element in the window DOM is ourselves.
 * That is because any subsequent script elements haven't shown up in the document
 * object yet.
 */
function dj_last_script_src() {
	var scripts = window.document.getElementsByTagName('script');
	if(scripts.length < 1){ 
		dojo.raise("No script elements in window.document, so can't figure out my script src"); 
	}
	var li = scripts.length-1;
	var xlinkNS = "http://www.w3.org/1999/xlink";
	var src = null;
	var script = null;
	while(!src){
		script = scripts.item(li);
		src = script.getAttributeNS(xlinkNS,"href");
		li--;
		if(li<0){ break; }
		// break;
	}
	if(!src){
		dojo.raise("Last script element (out of " + scripts.length + ") has no src");
	}
	return src;
}

if(!dojo.hostenv["library_script_uri_"]){
	dojo.hostenv.library_script_uri_ = dj_last_script_src();
}

// dojo.hostenv.loadUri = function(uri){
	/* FIXME: adding a script element doesn't seem to be synchronous, and so
	 * checking for namespace or object existance after loadUri using this
	 * method will error out. Need to figure out some other way of handling
	 * this!
	 */
	/*
	var se = document.createElement("script");
	se.src = uri;
	var head = document.getElementsByTagName("head")[0];
	head.appendChild(se);
	// document.write("<script type='text/javascript' src='"+uri+"' />");
	return 1;
}
*/