hostenv_adobesvg.js

一个简单的AJAX图书展示平台

/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

/*
 * Adobe SVG Viewer host environment
 */
if(typeof window == 'undefined'){
	dojo.raise("attempt to use adobe svg hostenv when no window object");
}

with(dojo.render){
	name = navigator.appName;
	ver = parseFloat(navigator.appVersion, 10);
	switch(navigator.platform){
		case "MacOS":
			os.osx =  true;
			break;
		case "Linux":
			os.linux =  true;
			break;
		case "Windows":
			os.win =  true;
			break;
		default:
			os.linux = true;
			break;
	};
	svg.capable = true;
	svg.support.builtin = true;
	svg.adobe = true;
};

// browserEval("alert(window.location);");

dojo.hostenv.println = function(s){
	try{
    // FIXME: this may not work with adobe's viewer, as we may first need a 
		// reference to the svgDocument
		// FIXME: need a way to determine where to position the text for this
    var ti = document.createElement("text");
    ti.setAttribute("x","50");
		var yPos = 25 + 15*document.getElementsByTagName("text").length;
    ti.setAttribute("y",yPos);
		var tn = document.createTextNode(s);
		ti.appendChild(tn);
		document.documentElement.appendChild(ti);
	}catch(e){

	}
}

dojo.debug = function() {
	if (!djConfig.isDebug) { return; }
	var args = arguments;
	if(typeof dojo.hostenv.println != 'function'){
		dojo.raise("attempt to call dojo.debug when there is no dojo.hostenv println implementation (yet?)");
	}
	var isJUM = dj_global["jum"];
	var s = isJUM ? "": "DEBUG: ";
	for(var i=0;i<args.length;++i){ s += args[i]; }
	if(isJUM){ // this seems to be the only way to get JUM to "play nice"
		jum.debug(s);
	}else{
		dojo.hostenv.println(s);
	}
}

dojo.hostenv.startPackage("dojo.hostenv");

dojo.hostenv.name_ = 'adobesvg';

dojo.hostenv.anonCtr = 0;
dojo.hostenv.anon = {};

dojo.hostenv.nameAnonFunc = function(anonFuncPtr, namespaceObj){
	var ret = "_"+this.anonCtr++;
	var nso = (namespaceObj || this.anon);
	while(typeof nso[ret] != "undefined"){
		ret = "_"+this.anonCtr++;
	}
	nso[ret] = anonFuncPtr;
	return ret;
}

dojo.hostenv.modulesLoadedFired = false;
dojo.hostenv.modulesLoadedListeners = [];
dojo.hostenv.getTextStack = [];
dojo.hostenv.loadUriStack = [];
dojo.hostenv.loadedUris = [];


dojo.hostenv.modulesLoaded = function(){
	if(this.modulesLoadedFired){ return; }
	if((this.loadUriStack.length==0)&&(this.getTextStack.length==0)){
		if(this.inFlightCount > 0){ 
			dojo.debug("couldn't initialize, there are files still in flight");
			return;
		}
		this.modulesLoadedFired = true;
		var mll = this.modulesLoadedListeners;
		for(var x=0; x<mll.length; x++){
			mll[x]();
		}
	}
}

dojo.hostenv.getNewAnonFunc = function(){
	var ret = "_"+this.anonCtr++;
	while(typeof this.anon[ret] != "undefined"){
		ret = "_"+this.anonCtr++;
	}
	// this.anon[ret] = function(){};
	eval("dojo.nostenv.anon."+ret+" = function(){};");
	return [ret, this.anon[ret]];
}

dojo.hostenv.displayStack = function(){
	var oa = [];
	var stack = this.loadUriStack;
	for(var x=0; x<stack.length; x++){
		oa.unshift([stack[x][0], (typeof stack[x][2])]);
	}
	dojo.debug("<pre>"+oa.join("\n")+"</pre>");
}

dojo.hostenv.unwindUriStack = function(){
	var stack = this.loadUriStack;
	for(var x in dojo.hostenv.loadedUris){
		for(var y=stack.length-1; y>=0; y--){
			if(stack[y][0]==x){
				stack.splice(y, 1);
			}
		}
	}
	var next = stack.pop();
	if((!next)&&(stack.length==0)){ 
		return;
	}
	for(var x=0; x<stack.length; x++){
		if((stack[x][0]==next[0])&&(stack[x][2])){
			next[2] == stack[x][2]
		}
	}
	var last = next;
	while(dojo.hostenv.loadedUris[next[0]]){
		last = next;
		next = stack.pop();
	}
	while(typeof next[2] == "string"){ // unwind as far as we can
		try{
			// dojo.debug("<pre><![CDATA["+next[2]+"]]></pre>");
			dj_eval(next[2]);
			next[1](true);
		}catch(e){
			dojo.debug("we got an error when loading "+next[0]);
			dojo.debug("error: "+e);
			// for(var x in e){ alert(x+" "+e[x]); }
		}
		dojo.hostenv.loadedUris[next[0]] = true;
		dojo.hostenv.loadedUris.push(next[0]);
		last = next;
		next = stack.pop();
		if((!next)&&(stack.length==0)){ break; }
		while(dojo.hostenv.loadedUris[next[0]]){
			last = next;
			next = stack.pop();
		}
	}
	if(next){
		stack.push(next);
		dojo.debug("### CHOKED ON: "+next[0]);
	}
}

/**
 * Reads the contents of the URI, and evaluates the contents.
 * Returns true if it succeeded. Returns false if the URI reading failed. Throws if the evaluation throws.
 * The result of the eval is not available to the caller.
 */
dojo.hostenv.loadUri = function(uri, cb){
	if(dojo.hostenv.loadedUris[uri]){
		return;
	}
	var stack = this.loadUriStack;
	stack.push([uri, cb, null]);
	var tcb = function(contents){
		// gratuitous hack for Adobe SVG 3, what a fucking POS
		if(contents.content){
			contents = contents.content;
		}

		// stack management
		var next = stack.pop();
		if((!next)&&(stack.length==0)){ 
			dojo.hostenv.modulesLoaded();
			return;
		}
		if(typeof contents == "string"){
			stack.push(next);
			for(var x=0; x<stack.length; x++){
				if(stack[x][0]==uri){
					stack[x][2] = contents;
				}
			}
			next = stack.pop();
		}
		if(dojo.hostenv.loadedUris[next[0]]){ 
			// dojo.debug("WE ALREADY HAD: "+next[0]);
			dojo.hostenv.unwindUriStack();
			return;
		}
		// push back onto stack
		stack.push(next);
		if(next[0]!=uri){
			//  and then unwind as far as we can
			if(typeof next[2] == "string"){
				dojo.hostenv.unwindUriStack();
			}

		}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);
}

/**
 * Reads the contents of the URI, and evaluates the contents.
 * Returns true if it succeeded. Returns false if the URI reading failed. Throws if the evaluation throws.
 * The result of the eval is not available to the caller.
 */
dojo.hostenv.loadUri = function(uri, cb){
	if(dojo.hostenv.loadedUris[uri]){
		return;
	}
	var stack = this.loadUriStack;
	stack.push([uri, cb, null]);
	var tcb = function(contents){
		// gratuitous hack for Adobe SVG 3, what a fucking POS
		if(contents.content){
			contents = contents.content;
		}

		// stack management
		var next = stack.pop();
		if((!next)&&(stack.length==0)){ 
			dojo.hostenv.modulesLoaded();
			return;
		}
		if(typeof contents == "string"){
			stack.push(next);
			for(var x=0; x<stack.length; x++){
				if(stack[x][0]==uri){
					stack[x][2] = contents;
				}
			}
			next = stack.pop();
		}
		if(dojo.hostenv.loadedUris[next[0]]){ 
			// dojo.debug("WE ALREADY HAD: "+next[0]);
			dojo.hostenv.unwindUriStack();
			return;
		}
		// push back onto stack
		stack.push(next);
		if(next[0]!=uri){
			//  and then unwind as far as we can
			if(typeof next[2] == "string"){
				dojo.hostenv.unwindUriStack();
			}