Page MenuHomeCode
Files F885581

hostenv_rhino.js
No OneTemporary
Actions

hostenv_rhino.js
View Options

/*
* Rhino host environment
*/
if(djConfig["baseUrl"]){
dojo.baseUrl = djConfig["baseUrl"];
}else{
dojo.baseUrl = "./";
}
dojo.locale = dojo.locale || String(java.util.Locale.getDefault().toString().replace('_','-').toLowerCase());
dojo._name = 'rhino';
dojo.isRhino = true;
if(typeof print == "function"){
console.debug = print;
}
if(typeof dojo["byId"] == "undefined"){
dojo.byId = function(id, doc){
if(id && (typeof id == "string" || id instanceof String)){
if(!doc){ doc = document; }
return doc.getElementById(id);
}
return id; // assume it's a node
}
}
// see comments in spidermonkey loadUri
dojo._loadUri = function(uri, cb){
try{
var local = (new java.io.File(uri)).exists();
if(!local){
try{
// try it as a file first, URL second
var stream = (new java.net.URL(uri)).openStream();
// close the stream so we don't leak resources
stream.close();
}catch(e){
// no debug output; this failure just means the uri was not found.
return false;
}
}
//FIXME: Use Rhino 1.6 native readFile/readUrl if available?
if(cb){
var contents = (local ? readText : readUri)(uri, "UTF-8");
cb(eval('('+contents+')'));
}else{
load(uri);
}
return true;
}catch(e){
console.debug("rhino load('" + uri + "') failed. Exception: " + e);
return false;
}
}
dojo.exit = function(exitcode){
quit(exitcode);
}
// Hack to determine current script...
//
// These initial attempts failed:
// 1. get an EcmaError and look at e.getSourceName(): try {eval ("static in return")} catch(e) { ...
// Won't work because NativeGlobal.java only does a put of "name" and "message", not a wrapped reflecting object.
// Even if the EcmaError object had the sourceName set.
//
// 2. var e = Packages.org.mozilla.javascript.Context.getCurrentContext().reportError('');
// Won't work because it goes directly to the errorReporter, not the return value.
// We want context.interpreterSourceFile and context.interpreterLine, which are used in static Context.getSourcePositionFromStack
// (set by Interpreter.java at interpretation time, if in interpreter mode).
//
// 3. var e = Packages.org.mozilla.javascript.Context.getCurrentContext().reportRuntimeError('');
// This returns an object, but e.message still does not have source info.
// In compiler mode, perhaps not set; in interpreter mode, perhaps not used by errorReporter?
//
// What we found works is to do basically the same hack as is done in getSourcePositionFromStack,
// making a new java.lang.Exception() and then calling printStackTrace on a string stream.
// We have to parse the string for the .js files (different from the java files).
// This only works however in compiled mode (-opt 0 or higher).
// In interpreter mode, entire stack is java.
// When compiled, printStackTrace is like:
// java.lang.Exception
// at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
// at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
// at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
// at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
// at org.mozilla.javascript.NativeJavaClass.constructSpecific(NativeJavaClass.java:228)
// at org.mozilla.javascript.NativeJavaClass.construct(NativeJavaClass.java:185)
// at org.mozilla.javascript.ScriptRuntime.newObject(ScriptRuntime.java:1269)
// at org.mozilla.javascript.gen.c2.call(/Users/mda/Sites/burstproject/testrhino.js:27)
// ...
// at org.mozilla.javascript.tools.shell.Main.main(Main.java:76)
//
// Note may get different answers based on:
// Context.setOptimizationLevel(-1)
// Context.setGeneratingDebug(true)
// Context.setGeneratingSource(true)
//
// Some somewhat helpful posts:
// http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&selm=9v9n0g%246gr1%40ripley.netscape.com
// http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&selm=3BAA2DC4.6010702%40atg.com
//
// Note that Rhino1.5R5 added source name information in some exceptions.
// But this seems not to help in command-line Rhino, because Context.java has an error reporter
// so no EvaluationException is thrown.
// do it by using java java.lang.Exception
dojo._rhinoCurrentScriptViaJava = function(depth){
var optLevel = Packages.org.mozilla.javascript.Context.getCurrentContext().getOptimizationLevel();
var caw = new java.io.CharArrayWriter();
var pw = new java.io.PrintWriter(caw);
var exc = new java.lang.Exception();
var s = caw.toString();
// we have to exclude the ones with or without line numbers because they put double entries in:
// at org.mozilla.javascript.gen.c3._c4(/Users/mda/Sites/burstproject/burst/Runtime.js:56)
// at org.mozilla.javascript.gen.c3.call(/Users/mda/Sites/burstproject/burst/Runtime.js)
var matches = s.match(/[^\(]*\.js\)/gi);
if(!matches){
throw Error("cannot parse printStackTrace output: " + s);
}
// matches[0] is entire string, matches[1] is this function, matches[2] is caller, ...
var fname = ((typeof depth != 'undefined')&&(depth)) ? matches[depth + 1] : matches[matches.length - 1];
var fname = matches[3];
if(!fname){ fname = matches[1]; }
// print("got fname '" + fname + "' from stack string '" + s + "'");
if (!fname){ throw Error("could not find js file in printStackTrace output: " + s); }
//print("Rhino getCurrentScriptURI returning '" + fname + "' from: " + s);
return fname;
}
// reading a file from disk in Java is a humiliating experience by any measure.
// Lets avoid that and just get the freaking text
function readText(path, encoding){
encoding = encoding || "utf-8";
// NOTE: we intentionally avoid handling exceptions, since the caller will
// want to know
var jf = new java.io.File(path);
var is = new java.io.FileInputStream(jf);
return dj_readInputStream(is, encoding);
}
function readUri(uri, encoding){
var conn = (new java.net.URL(uri)).openConnection();
encoding = encoding || conn.getContentEncoding() || "utf-8";
var is = conn.getInputStream();
return dj_readInputStream(is, encoding);
}
function dj_readInputStream(is, encoding){
var input = new java.io.BufferedReader(new java.io.InputStreamReader(is, encoding));
try {
var sb = new java.lang.StringBuffer();
var line = "";
while((line = input.readLine()) !== null){
sb.append(line);
sb.append(java.lang.System.getProperty("line.separator"));
}
return sb.toString();
} finally {
input.close();
}
}
// call this now because later we may not be on the top of the stack
if(!djConfig.libraryScriptUri.length){
try{
djConfig.libraryScriptUri = dojo._rhinoCurrentScriptViaJava(1);
}catch(e){
// otherwise just fake it
if(djConfig["isDebug"]){
print("\n");
print("we have no idea where Dojo is located.");
print("Please try loading rhino in a non-interpreted mode or set a");
print("\n\tdjConfig.libraryScriptUri\n");
print("Setting the dojo path to './'");
print("This is probably wrong!");
print("\n");
print("Dojo will try to load anyway");
}
djConfig.libraryScriptUri = "./";
}
}
// summary:
// return the document object associated with the dojo.global
dojo.doc = typeof(document) != "undefined" ? document : null;
dojo.body = function(){
return document.body;
}
dojo._timeouts = [];
function clearTimeout(idx){
if(!dojo._timeouts[idx]){ return; }
dojo._timeouts[idx].stop();
}
function setTimeout(func, delay){
// summary: provides timed callbacks using Java threads
var def={
sleepTime:delay,
hasSlept:false,
run:function(){
if(!this.hasSlept){
this.hasSlept=true;
java.lang.Thread.currentThread().sleep(this.sleepTime);
}
try{
func();
}catch(e){
console.debug("Error running setTimeout thread:" + e);
}
}
};
var runnable = new java.lang.Runnable(def);
var thread = new java.lang.Thread(runnable);
thread.start();
return dojo._timeouts.push(thread)-1;
}
//Register any module paths set up in djConfig. Need to do this
//in the hostenvs since hostenv_browser can read djConfig from a
//script tag's attribute.
if(djConfig["modulePaths"]){
for(var param in djConfig["modulePaths"]){
dojo.registerModulePath(param, djConfig["modulePaths"][param]);
}
}

File Metadata

Mime Type
text/x-c
Expires
Sun, Apr 6, 17:22 (2 w, 1 d ago)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
25574
Default Alt Text
hostenv_rhino.js (8 KB)

Event Timeline