X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fxwt%2FXWT.java;h=d599f0eefc54f09c3cfc8c5bd1fdb19e509e537e;hb=1520bffb91aed116c109133503f21082951e7d09;hp=a8880ae477cefcd95884fdfcb55a878f591e19c0;hpb=2fa20bbe798c44d0443d7b80d8dbcf7eb13fff4a;p=org.ibex.core.git

diff --git a/src/org/xwt/XWT.java b/src/org/xwt/XWT.java
index a8880ae..d599f0e 100644
--- a/src/org/xwt/XWT.java
+++ b/src/org/xwt/XWT.java
@@ -1,4 +1,4 @@
-// Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL]
+// Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
 package org.xwt;
 
 import java.io.*;
@@ -7,363 +7,302 @@ import java.text.*;
 import java.util.*;
 import org.xwt.js.*;
 import org.xwt.util.*;
+import org.xwt.translators.*;
 import org.bouncycastle.util.encoders.Base64;
 
 /** Singleton class that provides all functionality in the xwt.* namespace */
-public final class XWT extends JS.Obj {
+public final class XWT extends JS {
 
-    public static final XWT singleton = new XWT();
+    public final Stream rr;
+    public XWT(Stream rr) { this.rr = rr; }
 
-    /** each key is a string representing a filename which the user has already given XWT permission to write to */
-    private static Hashtable safeFiles = new Hashtable();
-
-    public Object get(Object name) {
-	if (name.equals("alt")) return Surface.alt ? Boolean.TRUE : Boolean.FALSE;
-        else if (name.equals("control")) return Surface.control ? Boolean.TRUE : Boolean.FALSE;
-        else if (name.equals("shift")) return Surface.shift ? Boolean.TRUE : Boolean.FALSE;
-        else if (name.equals("clipboard")) return Platform.getClipBoard();
-	else if (name.equals("static")) return Static.getStatic("");
-        else if (name.equals("button")) {
-            if (Surface.button1 && !Surface.button2 && !Surface.button3) return new Integer(1);
-            else if (!Surface.button1 && Surface.button2 && !Surface.button3) return new Integer(1);
-            else if (!Surface.button1 && !Surface.button2 && Surface.button3) return new Integer(1);
-            else return new Integer(0);
-	}
-        else if (name.equals("encodeURI")) throw new Error("not implemented");
-        else if (name.equals("encodeURIComponent")) throw new Error("not implemented");
-        else if (name.equals("decodeURI")) throw new Error("not implemented");
-        else if (name.equals("decodeURIComponent")) throw new Error("not implemented");
-	else return super.get(name);
+    private Cache subCache = new Cache(20);
+    private Sub getSub(String s) {
+        Sub ret = (Sub)subCache.get(s);
+        if (ret == null) subCache.put(s, ret = new Sub(s));
+        return ret;
     }
 
-    public void put(Object name, Object value) {
-	if (name.equals("thread") && value != null && value instanceof JS.Callable) ThreadMessage.newthread((JS.Callable)value);
-        else if (name.equals("clipboard")) Platform.setClipBoard(value.toString());
-        else if (name.equals("proxyAuthorization")) {
-	    // FIXME: undocumented, possibly insecure
-            Proxy.Authorization.authorization = value.toString();
-            Proxy.Authorization.waitingForUser.release();
-        } else super.put(name, value);
+    /** lets us put multi-level get/put/call keys all in the same method */
+    private class Sub extends JS {
+        String key;
+        Sub(String key) { this.key = key; }
+        public String toString() { return "XWTSUB " + key; }
+        public void put(Object key, Object val) throws JSExn { XWT.this.put(this.key + "." + key, val); }
+        public Object get(Object key) throws JSExn { return XWT.this.get(this.key + "." + key); }
+        public boolean coerceToBoolean() {
+            if (key.equals("ui.key.alt")) return Surface.alt ? true : false;
+            return super.coerceToBoolean();
+        }
+        public Object call(Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
+            return XWT.this.callMethod(this.key, a0, a1, a2, rest, nargs);
+        }
+        public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
+            return XWT.this.callMethod(this.key + "." + method, a0, a1, a2, rest, nargs);
+        }
     }
 
-    private XWT() {
-	put("maxdim", new Integer(Short.MAX_VALUE));
-        put("origin", Main.origin);
-        put("altKeyName", Platform.altKeyName());
-        put("screenWidth", new Integer(Platform.getScreenWidth()));
-        put("screenHeight", new Integer(Platform.getScreenHeight()));
-        put("fileSeparator", File.separator);
-        put("homeDir", System.getProperty("user.home"));
-        put("tempDir", System.getProperty("java.io.tempdir"));
-	put("math", org.xwt.js.Math.singleton);
-
-	put("newBrowserWindow", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() != 1 || args.elementAt(0) == null) return null;
-	    Platform.newBrowserWindow(args.elementAt(0).toString());
-	    return null;
-	}});
-
-	put("parseFloat", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() != 1 || args.elementAt(0) == null) return null;
-	    return new Float(args.elementAt(0).toString());
-	}});
-
-	put("parseInt", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() != 1 || args.elementAt(0) == null) return null;
-	    return new Float(args.elementAt(0).toString());
-	}});
-
-	put("yield", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    sleep(0);
-	    return null;
-	}});
-
-	put("theme", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-		if (args.length() != 2) return null;
-		if (args.elementAt(0) == null || args.elementAt(1) == null) return null;
-		for(int i=1; i<args.length(); i++) {
-		    if (args.elementAt(i) instanceof String) {
-			String from = (String)args.elementAt(0);
-			String to = (String)args.elementAt(i);
-			if (Log.on) Log.log(this, "retheming from " + from + " to " + to);
-			Resources.mapFrom.addElement(from);
-			Resources.mapTo.addElement(to);
-		    }
-		}
-		JS.Callable callback = args.elementAt(args.length() - 1) instanceof JS.Callable ?
-		    (JS.Callable)args.elementAt(args.length() - 1) : null;
-		Template.retheme(callback);
-		return null;
-	}});
-	    
-	put("println", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() != 1) return null;
-	    if (Log.on) Log.log(this, Context.getCurrentSourceNameAndLine() + " " +
-				(args.elementAt(0) == null ? "**null**" : args.elementAt(0).toString()));
-	    return null;
-	}});
-
-	put("date", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    Log.log(XWT.class, "date not implemented");
-	    //throw new Error("not implemented");
-	    return null;
-        }});
-
-	put("regexp", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    //throw new Error("not implemented");
-	    Log.log(XWT.class, "regexp not implemented");
-	    return null;
-	}});
-
-	put("listfonts", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    Object[] fonts = Platform.listFonts();
-	    JS.Array ret = new JS.Array();
-	    for(int i=0; i<fonts.length; i++) ret.addElement(fonts[i]);
-	    return ret;
-	}});
-
-	put("xmlrpc", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() != 1 || args.elementAt(0) == null) return null;
-	    return new XMLRPC(args.elementAt(0).toString(), "");
-	}});
-
-	put("soap", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() == 1 && args.elementAt(0) != null) return new SOAP(args.elementAt(0).toString(), "", null, null);
-	    else if (args.length() == 2 && args.elementAt(0) != null && args.elementAt(1) != null)
-		return new SOAP(args.elementAt(0).toString(), "", args.elementAt(1).toString(), null);
-	    else if (args.length() == 3 && args.elementAt(0) != null && args.elementAt(1) != null && args.elementAt(2) != null)
-		return new SOAP(args.elementAt(0).toString(), "", args.elementAt(1).toString(), args.elementAt(2).toString());
-	    else return null;
-	}});
-
-	put("textwidth", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() < 1 || args.length() > 2) return null;
-	    if (args.elementAt(0) == null || (args.length() == 2 && args.elementAt(1) == null)) return null;
-	    String font = args.length() == 1 ? Platform.getDefaultFont() : args.elementAt(0).toString();
-	    String text = args.length() == 1 ? args.elementAt(0).toString() : args.elementAt(1).toString();
-	    XWF xwf = XWF.getXWF(font);
-	    if (xwf == null) return new Integer(Platform.stringWidth(font, text));
-	    else return new Integer(xwf.stringWidth(text));
-	}});
-
-	put("textheight", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() > 1) return null;
-	    if (args.length() == 1 && args.elementAt(0) == null) return null;
-	    String font = args.length() == 0 || args.elementAt(0) == null ? Platform.getDefaultFont() : args.elementAt(0).toString();
-	    XWF xwf = XWF.getXWF(font);
-	    if (xwf == null) return new Integer(Platform.getMaxAscent(font) + Platform.getMaxDescent(font));
-	    else return new Integer(xwf.getMaxAscent() + xwf.getMaxDescent());
-	}});
-	
-	put("newBox", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() > 0) Log.log(XWT.class, "DEPRECATED: xwt.newBox() with multiple arguments is deprecated; use xwt.newBox().apply()");
-	    JS.Callable callback = null;
-	    for(int i=1; i<args.length(); i++)
-		if (args.elementAt(i) instanceof JS.Callable && callback == null)
-		    callback = (JS.Callable)args.elementAt(i);
-	    Box ret = new Box(args.length() == 0 || args.elementAt(0) == null ? "box" : args.elementAt(0).toString(),
-			      Template.defaultImportList, callback);
-	    for(int i=1; i<args.length(); i++)
-		if (args.elementAt(i) instanceof Box)
-		    ret.put(ret.numChildren(), (Box)args.elementAt(i));
-	    for(int i=1; i<args.length(); i++)
-		if (args.elementAt(i) instanceof JS && !(args.elementAt(i) instanceof Box) && !(args.elementAt(i) instanceof JS.Callable)) {
-		    JS s = (JS)args.elementAt(i);
-		    Object[] keys = s.keys();
-		    for(int j=0; j<keys.length; j++) ret.put(keys[j].toString(), s.get(keys[j].toString()));
-		}
-	    return ret;
-	}});
-
-	put("sleep", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args != null && (args.length() != 1 || args.elementAt(0) == null)) return null;
-	    int i = args == null ? 0 : SpecialBoxProperty.stoi(args.elementAt(0).toString());
-	    sleep(i);
-	    return null;
-	}});
-
-	put("openFile", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() != 1) return null;
-	    String file = Platform.fileDialog(args.elementAt(0).toString(), false);
-	    return file == null ? null : new ByteStream(file);
-	}});
-
-	put("saveFile", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() != 2) return null;
-	    if (!(args.elementAt(1) instanceof ByteStream)) return null;
-	    String file = args.elementAt(0).toString();
-	    if (safeFiles.get(Platform.isCaseSensitive() ? file : file.toLowerCase()) == null) {
-		file = Platform.fileDialog(file, true);
-		if (file == null) return null;
-		safeFiles.put(Platform.isCaseSensitive() ? file : file.toLowerCase(), new Object());
-	    }
-	    try {
-		((ByteStream)args.elementAt(1)).writeTo(new FileOutputStream(file));
-		return null;
-	    } catch (IOException e) {
-		if (Log.on) Log.log(ByteStream.class, "IO Exception while writing a ByteStream to a file");
-		if (Log.on) Log.log(ByteStream.class, e);
-		throw new JS.Exn("error while writing a ByteStream to a file");
-	    }
-	}});
-
-	put("saveFileAs", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args.length() != 2) return null;
-	    if (!(args.elementAt(1) instanceof ByteStream)) return null;
-	    String file = args.elementAt(0).toString();
-	    file = Platform.fileDialog(file, true);
-	    if (file == null) return null;
-	    safeFiles.put(Platform.isCaseSensitive() ? file : file.toLowerCase(), new Object());
-	    try {
-		((ByteStream)args.elementAt(1)).writeTo(new FileOutputStream(file));
-		return null;
-	    } catch (IOException e) {
-		if (Log.on) Log.log(ByteStream.class, "IO Exception while writing a ByteStream to a file");
-		if (Log.on) Log.log(ByteStream.class, e);
-		throw new JS.Exn("error while writing a ByteStream to a file");
-	    }
-	}});
+    public Object get(Object name) throws JSExn {
+        if (name instanceof String && ((String)name).length() == 0) return rr;
+        //#switch(name)
+        case "math": return xwtMath;
+        case "string": return xwtString;
+        case "date": return METHOD;
+        case "origin": return Main.origin;  // FIXME not in ref
+        case "box": return new Box();
+        case "apply": return METHOD;
+        case "graft": return METHOD;
+        case "clone": return METHOD;
+        case "regexp": return METHOD;
+        case "font": return getSub("font");
+        case "font.sansserif": return Main.builtin.get("fonts/vera/Vera.ttf");
+        case "font.monospace": return Main.builtin.get("fonts/vera/VeraMono.ttf");
+        case "font.serif": return Main.builtin.get("fonts/vera/VeraSe.ttf");
+        case "ui": return getSub("ui");
+        case "ui.browser": return METHOD;
+        case "ui.mouse": return getSub("ui.mouse");
+        case "ui.mouse.button":
+            if (Surface.button1 && !Surface.button2 && !Surface.button3) return N(1);
+            else if (!Surface.button1 && Surface.button2 && !Surface.button3) return N(2);
+            else if (!Surface.button1 && !Surface.button2 && Surface.button3) return N(3);
+            else return ZERO;
+        case "ui.key": return getSub("ui.key");
+        case "ui.key.alt": return getSub("ui.key.alt");
+        case "ui.key.alt.name": return Platform.altKeyName();
+        case "ui.key.control": return Surface.control ? T : F;
+        case "ui.key.shift": return Surface.shift ? T : F;
+        case "ui.clipboard": return Platform.getClipBoard();
+        case "ui.maxdim": return new Integer(Short.MAX_VALUE);
+        case "ui.screen": return getSub("ui.screen");
+        case "ui.screen.width": return new Integer(Platform.getScreenWidth());
+        case "ui.screen.height": return new Integer(Platform.getScreenHeight());
+        case "undocumented": return getSub("undocumented");
+        case "undocumented.internal": return getSub("undocumented.internal");
+        case "thread": return getSub("thread");
+        case "thread.yield": return METHOD;
+        case "thread.sleep": return METHOD;
+        case "stream": return getSub("stream");
+        case "stream.home": return url2res("file:" + System.getProperty("user.home"));
+        case "stream.temp": return url2res("file:" + System.getProperty("java.io.tempdir"));
+        case "stream.watch": return METHOD;
+        case "stream.unzip": return METHOD;
+        case "stream.uncab": return METHOD;
+        case "stream.cache": return METHOD;
+        case "stream.url": return METHOD;
+        case "stream.parse.html": return METHOD;
+        case "stream.parse.xml": return METHOD;
+        case "stream.parse.utf8": return METHOD;
+        case "rpc": return getSub("rpc");
+        case "rpc.xml": return METHOD;
+        case "rpc.soap": return METHOD;
+        case "log": return getSub("log");
+        case "log.debug": return METHOD;
+        case "log.info": return METHOD;
+        case "log.warn": return METHOD;
+        case "log.error": return METHOD;
+        case "crypto": return getSub("crypto");
+        case "crypto.rsa": return METHOD;
+        case "crypto.md5": return METHOD;
+        case "crypto.sha1": return METHOD;
+        case "crypto.rc4": return METHOD;
+        //#end
+        return super.get(name);
+    }
 
-	put("utfEncode", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	    if (args == null || args.length() != 1) return null;
-	    return new ByteStream(args.elementAt(0).toString().getBytes());
-	}});
+    public void put(Object name, final Object value) throws JSExn {
+        //#switch(name)
+        case "thread": Scheduler.add((JSFunction)value); return;
+        case "ui.clipboard": Platform.setClipBoard((String)value); return;
+        case "ui.frame": Platform.createSurface((Box)value, true, true); return;
+        case "ui.window": Platform.createSurface((Box)value, false, true); return;
+        case "undocumented.internal.proxyAuthorization":
+            HTTP.Proxy.Authorization.authorization = value.toString();
+            HTTP.Proxy.Authorization.waitingForUser.release(); return;
+        //#end
+
+        throw new JSExn("attempted to put unknown property: xwt."+name);
+    }
 
-	put("parseHTML", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-                if (args == null || args.length() != 1 || args.elementAt(0) == null) return null;
-                try {
-                    if (args.elementAt(0) instanceof ByteStream) {
-                        return HTML.parseReader(new InputStreamReader(((ByteStream)args.elementAt(0)).getInputStream()));
-                    } else {
-                        return HTML.parseReader(new StringReader(args.elementAt(0).toString()));
-                    }
-                } catch (IOException e) {
-                    if (Log.on) Log.log(HTML.class, "IO Exception while parsing HTML");
-                    if (Log.on) Log.log(HTML.class, e);
-                    throw new JS.Exn("error while parsing HTML");
-                }
+    public Object callMethod(Object name, Object a, Object b, Object c, Object[] rest, int nargs) throws JSExn {
+        try {
+            //#switch(name)
+            case "date": return new JSDate(a, b, c, rest, nargs);
+            case "rpc.soap": return new SOAP((String)a, "", (String)b, (String)c);
+            case "graft":
+                if (a instanceof Box) throw new JSExn("can't graft onto Boxes");
+                if (a instanceof String) throw new JSExn("can't graft onto Strings");
+                if (a instanceof Number) throw new JSExn("can't graft onto Numbers");
+                if (a instanceof Stream) return new Stream.Graft((Stream)a, b, c);
+                // FEATURE: grafting onto JS
+                throw new JSExn("cannot graft onto "+a.getClass());
+            //#end
+ 
+            switch (nargs) {
+                case 0:
+                    //#switch(name)
+                    case "thread.yield": sleep(0); return null;
+                    //#end
+                    break;
+                case 1:
+                    //#switch(name)
+                    case "ui.browser": Platform.newBrowserWindow((String)a); return null;
+                    case "clone": return new XWT((Stream)a);
+                    case "stream.unzip": return new Stream.Zip((Stream)a);
+                    case "stream.uncab": return new Stream.Cab((Stream)a);
+                    case "stream.cache": try { return new Stream.CachedStream((Stream)a, "resources", true); }
+                                      catch (Stream.NotCacheableException e) { throw new JSExn("this resource cannot be cached"); }
+                    case "stream.url": return url2res((String)a);
+                    case "thread.sleep": sleep(JS.toInt(a)); return null;
+                    case "log.debug":   JS.log(this, a== null ? "**null**" : a.toString()); return null;
+                    case "log.info":   JS.log(this, a== null ? "**null**" : a.toString()); return null;
+                    case "log.warn":   JS.log(this, a== null ? "**null**" : a.toString()); return null;
+                    case "log.error":   JS.log(this, a== null ? "**null**" : a.toString()); return null;
+                    case "regexp": return new JSRegexp(a, null);
+                    case "rpc.xml": return new XMLRPC((String)a, "");
+                    case "crypto.rsa": /* FEATURE */ return null;
+                    case "crypto.md5": /* FEATURE */ return null;
+                    case "crypto.sha1": /* FEATURE */ return null;
+                    case "crypto.rc4": /* FEATURE */ return null;
+                    case "stream.parse.html": /* FIXME */ return null;
+                    case "stream.parse.xml": /* FIXME -- SAX NOT DOM!! */ return null;
+                    case "stream.parse.utf8": /* FIXME */ return null;
+                    //#end
+                    break;
+                case 2:
+                    //#switch(name)
+                    case "stream.watch": return new Stream.ProgressWatcher((Stream)a, (JSFunction)b);
+                    case "apply":
+                        if (b instanceof Stream) Template.getTemplate((Stream)b).apply((Box)a, XWT.this);
+                        else {
+                            JS to = (JS)a, from = (JS)b; Object k;
+                            for (Enumeration e = from.keys(); e.hasMoreElements();) {
+                                k = e.nextElement(); to.put(k, from.get(k));
+                            }
+                        }
+                        return a;
+                    //#end
+                    break;
             }
-        });
-    
-    put("recursivePrintObject", new JS.Callable() { public Object call(JS.Array args) {
-	if (args.length() != 1) return null;
-	recurse("", "", args.elementAt(0));
-	return null;
-    }});
-
-    put("loadArchive", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	if (!ThreadMessage.suspendThread()) return null;
-	try {
-	    if (args == null || args.length() < 1 || args.elementAt(0) == null) return null;
-	    URL u = new URL(args.elementAt(0).toString());
-	    
-	    JS.Callable callback = null;
-	    if (args.length() == 2 && args.elementAt(1) != null && args.elementAt(1) instanceof JS.Callable)
-		callback = (JS.Callable)args.elementAt(1);
-	    
-	    if (!u.getFile().endsWith(".xwar")) {
-		if (Log.on) Log.log(this, "Error: archive names must end with .xwar: " + u.getFile());
-		throw new JS.Exn("Error: archive names must end with .xwar: " + u.getFile());
-	    }
-	    
-	    if (u.getProtocol().equals("http")) {
-		HTTP http = new HTTP(u.toString());
-		if (Main.originAddr == null) {
-		    try {
-			Main.originAddr = InetAddress.getByName(u.getHost());
-		    } catch (UnknownHostException e) {
-			if (Log.on) Log.log(this, "couldn't resolve " + u.getHost() + "; proceeding without permissions");
-			Main.originAddr = InetAddress.getByName("0.0.0.0");
-		    }
-		} else {
-		    Main.originAddr = InetAddress.getByName("0.0.0.0");
-		}
-		HTTP.HTTPInputStream in = http.GET();
-		Resources.loadArchive(in, in.getContentLength(), callback);
-		
-	    } else if (u.getProtocol().equals("file")) {
-		if (Main.originAddr != null) {
-		    if (Log.on) Log.log(this, "scripts downloaded from the network may not load xwars from the local filesystem");
-		    throw new JS.Exn("scripts downloaded from the network may not load xwars from the local filesystem");
-		}
-		Resources.loadArchive(new FileInputStream(u.getFile()), (int)new File(u.getFile()).length(), callback);
-		
-	    } else {
-		if (Log.on) Log.log(this, "unknown protocol \"" + u.getProtocol() + "\"");
-		throw new JS.Exn("unknown protocol \"" + u.getProtocol() + "\"");
-	    }
-	    
-	} catch (MalformedURLException me) {
-	    if (Log.on) Log.log(this, "Malformed URL: " + args.elementAt(0));
-	    if (Log.on) Log.log(this, me);
-	    throw new JS.Exn(me.toString());
-	    
-	} catch (IOException ioe) {
-	    if (Log.on) Log.log(this, "IOException while loading archive:");
-	    if (Log.on) Log.log(this, ioe);
-	    throw new JS.Exn(ioe.toString());
-	    
-	} finally {
-	    ThreadMessage.resumeThread();
-	    
-	}
-	return null;
-    }});
+        } catch (RuntimeException e) {
+            // FIXME: maybe JSExn should take a second argument, Exception
+            Log.info(this, "xwt."+name+"() threw: "+e);
+            throw new JSExn("invalid argument for xwt object method "+name+"()");
+        }
 
-    put("prefetchImage", new JS.Callable() { public Object call(JS.Array args) throws JS.Exn {
-	if (args == null || args.length() < 1 || args.elementAt(0) == null) return null;
-	Box.getImage(args.elementAt(0).toString(),
-		     args.length() > 1 && args.elementAt(1) instanceof JS.Callable ? (JS.Callable)args.elementAt(1) : null);
-	return null;
-    }});
+        throw new JSExn("invalid number of arguments for xwt object method "+name+"()");
     }
 
-    private static void recurse(String indent, String name, Object o) {
-        if (!name.equals("")) name += " : ";
-
-        if (o == null) {
-            Log.log(Context.getCurrentSourceNameAndLine() , indent + name + "<null>");
-
-        } else if (o instanceof JS.Array) {
-            Log.log(Context.getCurrentSourceNameAndLine() , indent + name + "<array>");
-            JS.Array na = (JS.Array)o;
-            for(int i=0; i<na.length(); i++)
-                recurse(indent + "  ", i + "", na.elementAt(i));
-
-        } else if (o instanceof JS) {
-            Log.log(Context.getCurrentSourceNameAndLine() , indent + name + "<object>");
-            JS s = (JS)o;
-            Object[] keys = s.keys();
-            for(int i=0; i<keys.length; i++)
-                recurse(indent + "  ", keys[i].toString(),
-                        (keys[i] instanceof Integer) ?
-			s.get(((Integer)keys[i])) : s.get(keys[i].toString()));
-
-        } else {
-            Log.log(Context.getCurrentSourceNameAndLine(), indent + name + o);
+    public Stream url2res(String url) throws JSExn {
+        if (url.startsWith("http://")) return new Stream.HTTP(url);
+        else if (url.startsWith("https://")) return new Stream.HTTP(url);
+        else if (url.startsWith("data:")) return new Stream.ByteArray(Base64.decode(url.substring(5)), null);
+        else if (url.startsWith("utf8:")) return new Stream.ByteArray(url.substring(5).getBytes(), null);
+        else throw new JSExn("invalid resource specifier " + url);
+        // FIXME support file:// via dialog boxes
+    }
 
+    public static void sleep(final int i) throws JSExn {
+        try {
+            final JS.UnpauseCallback callback = JS.pause();
+            final long currentTime = System.currentTimeMillis();
+            new Thread() { public void run() {
+                try { Thread.sleep(i); } catch (InterruptedException e) { }
+                Scheduler.add(callback);
+            } }.start();
+        } catch (JS.NotPauseableException npe) {
+            throw new JSExn("you cannot sleep or yield in the foreground thread");
         }
     }
-
-
-    public static void sleep(int i) {
-	Thread thread = Thread.currentThread();
-	if (!(thread instanceof ThreadMessage)) {
-	    if (Log.on) Log.log(XWT.class, "cannot sleep() or yield() in the foreground thread");
-	} else {
-	    ThreadMessage mythread = (ThreadMessage)thread;
-	    mythread.done.release();
-	    if (i > 0) try { Thread.sleep(i); } catch (Exception e) { }
-	    MessageQueue.add(mythread);
-	    mythread.go.block();
-	}
+    
+    public static final JSMath xwtMath = new JSMath() {
+            private JS gs = new JSScope.Global();
+            public String toString() { return "XWTMATH"; }
+            public Object get(Object key) throws JSExn {
+                //#switch(key)
+                case "isNaN": return gs.get("isNaN");
+                case "isFinite": return gs.get("isFinite");
+                case "NaN": return gs.get("NaN");
+                case "Infinity": return gs.get("Infinity");
+                //#end
+                return super.get(key);
+            }
+        };
+
+    public static final JS xwtString = new JS() {
+            private JS gs = new JSScope.Global();
+            public void put(Object key, Object val) { }
+            public Object get(Object key) throws JSExn {
+                //#switch(key)
+                case "parseInt": return gs.get("parseInt");
+                case "parseFloat": return gs.get("parseFloat");
+                case "decodeURI": return gs.get("decodeURI");
+                case "decodeURIComponent": return gs.get("decodeURIComponent");
+                case "encodeURI": return gs.get("encodeURI");
+                case "encodeURIComponent": return gs.get("encodeURIComponent");
+                case "escape": return gs.get("escape");
+                case "unescape": return gs.get("unescape");
+                case "fromCharCode": return gs.get("stringFromCharCode");
+                //#end
+                return null;
+            }
+        };
+
+    private class XMLHelper extends XML {
+        Vector obStack = new Vector();
+        public XMLHelper() { super(BUFFER_SIZE); }
+        public void startElement(XML.Element c) throws XML.Exn {
+            try {
+                JS o = new JS();
+                o.put("$name", c.getLocalName());
+                for(int i=0; i < c.getAttrLen(); i++) o.put(c.getAttrKey(i), c.getAttrVal(i));
+                o.put("$numchildren", new Integer(0));
+                obStack.addElement(o);
+            } catch (JSExn jse) {
+                throw new Error("this should never happen");
+            }
+        }
+        public void endElement(XML.Element c) throws XML.Exn {
+            try {
+                if (obStack.size() == 1) return;
+                JS me = (JS)obStack.lastElement();
+                obStack.setSize(obStack.size() - 1);
+                JS parent = (JS)obStack.lastElement();
+                int numchildren = ((Integer)parent.get("$numchildren")).intValue();
+                parent.put("$numchildren", new Integer(numchildren + 1));
+                parent.put(new Integer(numchildren), me);
+            } catch (JSExn jse) {
+                throw new Error("this should never happen");
+            }
+        }
+        public void characters(char[] ch, int start, int length) throws XML.Exn {
+            try {
+                String s = new String(ch, start, length);
+                JS parent = (JS)obStack.lastElement();
+                int numchildren = ((Integer)parent.get("$numchildren")).intValue();
+                Object lastChild = parent.get(new Integer(numchildren - 1));
+                if (lastChild instanceof String) {
+                    parent.put(new Integer(numchildren - 1), lastChild + s);
+                } else {
+                    parent.put("$numchildren", new Integer(numchildren + 1));
+                    parent.put(new Integer(numchildren), s);
+                }
+            } catch (JSExn jse) {
+                throw new Error("this should never happen");
+            }
+        }
+        public void whitespace(char[] ch, int start, int length) {}
+        public JS doParse(InputStream is) throws JSExn {
+            try { 
+                BufferedReader r = new BufferedReader(new InputStreamReader(is));
+                parse(r);
+            } catch (XML.Exn e) {
+                throw new JSExn("error parsing XML: " + e.toString());
+            } catch (IOException e) {
+                if (Log.on) Log.info(this, "IO Exception while reading from file");
+                if (Log.on) Log.info(this, e);
+                throw new JSExn("error reading from Resource");
+            }
+            return obStack.size() >= 1 ? (JS)obStack.elementAt(0) : null;
+        }
     }
 }
-
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