X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fxwt%2FXWT.java;h=e5c443f9aba8bbceec769f8592f1c4a3ba263a5f;hb=16c24a73c1c1b2955db0bbbaf5a940215329bca1;hp=340033f79b1533ea7a90c6639a3c8524d383f5b3;hpb=91923edb33dda2409069b16ed0ed1c56155e8c6c;p=org.ibex.core.git

diff --git a/src/org/xwt/XWT.java b/src/org/xwt/XWT.java
index 340033f..e5c443f 100644
--- a/src/org/xwt/XWT.java
+++ b/src/org/xwt/XWT.java
@@ -1,338 +1,360 @@
-// Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL]
+// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
 package org.xwt;
 
 import java.io.*;
 import java.net.*;
 import java.text.*;
 import java.util.*;
+import org.xwt.js.*;
 import org.xwt.util.*;
-import org.mozilla.javascript.*;
+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 JSObject {
+public final class XWT extends JS.Cloneable {
 
-    public static final XWT singleton = new XWT();
+    // FIXME remove this
+    private final JS rr;
+    public XWT(Stream rr) { this.rr = bless(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 String getClassName() { return "XWT"; }
-    private XWT() { setSeal(true); }
-
-    public Object get(String name, Scriptable start) {
-        if (name == null) return null;
-        else if (name.equals("maxdim")) return new Integer(Short.MAX_VALUE);
-        else if (name.equals("parseFloat")) return JSObject.defaultObjects.get("parseFloat", null);
-        else if (name.equals("parseInt")) return JSObject.defaultObjects.get("parseInt", null);
-        else 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("date")) return date;
-        else if (name.equals("listfonts")) return listfonts;
-        else if (name.equals("regexp")) return regexp;
-        else if (name.equals("sleep")) return sleep;
-        else if (name.equals("yield")) return yield;
-        else if (name.equals("newBrowserWindow")) return newBrowserWindow;
-        else if (name.equals("textwidth")) return textwidth;
-        else if (name.equals("textheight")) return textheight;
-        else if (name.equals("newBox")) return newBox;
-        else if (name.equals("soap")) return soap;
-        else if (name.equals("xmlrpc")) return xmlrpc;
-        else if (name.equals("origin")) return Main.origin;
-        else if (name.equals("clipboard")) return Platform.getClipBoard();
-        else if (name.equals("altKeyName")) return Platform.altKeyName();
-        else if (name.equals("screenWidth")) return new Integer(Platform.getScreenWidth());
-        else if (name.equals("screenHeight")) return new Integer(Platform.getScreenHeight());
-        else if (name.equals("static")) return Static.getStatic("");
-        else if (name.equals("theme")) return theme;
-        else if (name.equals("openFile")) return openFile;
-        else if (name.equals("saveFile")) return saveFile;
-        else if (name.equals("saveFileAs")) return saveFileAs;
-        else if (name.equals("utfEncode")) return utfEncode;
-        else if (name.equals("fileSeparator")) return File.separator;
-        else if (name.equals("homeDir")) return System.getProperty("user.home");
-        else if (name.equals("tempDir")) return System.getProperty("java.io.tempdir");
-        else if (name.equals("recursivePrintObject")) return recursivePrintObject;
-        else if (name.equals("parseHTML")) return parseHTML;
-        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);
+    public JS resolveString(String str, boolean permitAbsolute) throws JSExn {
+        if (str.indexOf("://") != -1) {
+            if (permitAbsolute) return (Stream)url2res(str);
+            throw new JSExn("absolute URL " + str + " not permitted here");
+        }
+        // root-relative
+        //JS ret = (JS)getAndTriggerTraps("");
+        //FIXME
+        JS ret = rr;
+        while(str.indexOf('.') != -1) {
+            String path = str.substring(0, str.indexOf('.'));
+            str = str.substring(str.indexOf('.') + 1);
+            ret = (JS)ret.get(path);
         }
-        else if (name.equals("println")) return println;
-        else if (name.equals("math")) return org.xwt.util.JSObject.defaultObjects.get("Math", null);
-        else return super.get(name, start);
+        ret = (JS)ret.get(str);
+        return ret;
     }
 
-    public void put(String name, Scriptable start, Object value) {
-        if (name == null) return;
-        else if (name.equals("thread") && value != null && value instanceof Function) ThreadMessage.newthread((Function)value);
-        else if (name.equals("clipboard")) Platform.setClipBoard(value.toString());
-        else super.put(name, start, 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 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 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);
+        }
     }
-
-
-    // JSFunction Instances ///////////////////////////////////////////////////////////////////
-
-    /** Helper class for defining functions. */
-    private static abstract class JSFunction extends JSObject implements Function {
-        JSFunction() { setSeal(true); }
-        public Scriptable construct(Context cx, Scriptable scope, java.lang.Object[] args) { return null; }
+    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;
     }
 
-    private static final JSFunction newBrowserWindow = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length != 1 || args[0] == null) return null;
-                Platform.newBrowserWindow(args[0].toString());
-                return null;
-            }
-        };
-
-    private static final JSFunction yield = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                sleep.call(cx, null, null, null);
-                return null;
-            }
-        };
-
-    private static final JSFunction println = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length == 1)
-                    if (Log.on)
-                        Log.log(cx.interpreterSourceFile, args[0] == null ? "null" : args[0].toString());
-                return null;
-            }
-        };
-
-    private static final JSFunction date = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                try { return Context.enter().newObject(org.xwt.util.JSObject.defaultObjects, "Date", args);
-                } catch (Exception e) {
-                    if (Log.on) Log.log(this, "Exception in Context.newObject() -- this should never happen");
-                    if (Log.on) Log.log(this, e);
-                    return null;
-                }
-            }
-        };
-
-    private static final JSFunction regexp = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                try { return Context.enter().newObject(org.xwt.util.JSObject.defaultObjects, "RegExp", args);
-                } catch (Exception e) {
-                    if (Log.on) Log.log(this, "Exception in Context.newObject() -- this should never happen");
-                    if (Log.on) Log.log(this, e);
-                    return null;
-                }
-            }
-        };
-
-    private static final JSFunction listfonts = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                return Context.enter().newArray(org.xwt.util.JSObject.defaultObjects,  Platform.listFonts());
-            }
-        };
-
-    private static final JSFunction theme = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length != 2) return null;
-                if (args[0] == null || args[1] == null) return null;
-                Template.retheme(args[0].toString(), args[1].toString());
-                return null;
-            }
-        };
-
-    private static final JSFunction xmlrpc = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length != 1 || args[0] == null) return null;
-                return new XMLRPC(args[0].toString(), "");
-            }
-        };
-
-    private static final JSFunction soap = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length == 1 && args[0] != null) return new SOAP(args[0].toString(), "", null, null);
-                else if (args.length == 2 && args[0] != null && args[1] != null)
-                    return new SOAP(args[0].toString(), "", args[1].toString(), null);
-                else if (args.length == 3 && args[0] != null && args[1] != null && args[2] != null)
-                    return new SOAP(args[0].toString(), "", args[1].toString(), args[2].toString());
-                else return null;
-            }
-        };
-
-    private static final JSFunction textwidth = new JSFunction() {
-            public Object call(Context cx, Scriptable scope, Scriptable thisObj, Object[] args) throws JavaScriptException {
-                if (args.length < 1 || args.length > 2) return null;
-                if (args[0] == null || (args.length == 2 && args[1] == null)) return null;
-                String font = args.length == 1 ? Platform.getDefaultFont() : args[0].toString();
-                String text = args.length == 1 ? args[0].toString() : args[1].toString();
-                XWF xwf = XWF.getXWF(font);
-                if (xwf == null) return new Integer(Platform.stringWidth(font, text));
-                else return new Integer(xwf.stringWidth(text));
-            }
-        };
-
-
-    private static final JSFunction textheight = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length > 1) return null;
-                if (args.length == 1 && args[0] == null) return null;
-                String font = args.length == 0 || args[0] == null ? Platform.getDefaultFont() : args[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());
-            }
-        };
+    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 "box": return new Box();
+        case "clone": return METHOD;
+        case "bless": return METHOD;
+        case "regexp": return METHOD;
+        case "ui": return getSub("ui");
+        case "ui.font": return getSub("ui.font");
+        case "ui.font.sansserif": return Main.builtin.get("fonts/vera/Vera.ttf");
+        case "ui.font.monospace": return Main.builtin.get("fonts/vera/VeraMono.ttf");
+        case "ui.font.serif": return Main.builtin.get("fonts/vera/VeraSe.ttf");
+        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.name": return getSub("ui.key.name");
+        case "ui.key.name.alt": return Platform.altKeyName();
+        case "ui.key.alt": return Surface.alt ? T : F;
+        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 N(Short.MAX_VALUE);
+        case "ui.screen": return getSub("ui.screen");
+        case "ui.screen.width": return N(Platform.getScreenWidth());
+        case "ui.screen.height": return N(Platform.getScreenHeight());
+        case "undocumented": return getSub("undocumented");
+        case "undocumented.initialOrigin": return Main.origin;
+        case "undocumented.initialTemplate": return Main.initialTemplate;
+        case "thread": return getSub("thread");
+        case "thread.yield": return METHOD;
+        case "thread.sleep": return METHOD;
+        case "stream": return getSub("stream");
+        case "stream.homedir": return url2res("file:" + System.getProperty("user.home"));
+        case "stream.tempdir": 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 "net": return getSub("net");
+        case "net.rpc": return getSub("net.rpc");
+        case "net.rpc.xml": return METHOD;
+        case "net.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);
+    }
 
-    private static final JSFunction newBox = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                Box ret = new Box(args.length == 0 || args[0] == null ? "box" : args[0].toString(), Template.defaultImportList);
-                for(int i=1; i<args.length; i++)
-                    if (args[i] instanceof Box)
-                        ret.put(ret.numChildren(), null, (Box)args[i]);
-                for(int i=1; i<args.length; i++)
-                    if (args[i] instanceof Scriptable && !(args[i] instanceof Box)) {
-                        Scriptable s = (Scriptable)args[i];
-                        Object[] keys = s.getIds();
+    public void put(Object name, final Object value) throws JSExn {
+        //#switch(name)
+        case "thread": Scheduler.add((Scheduler.Task)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.proxyAuthorization":
+            HTTP.Proxy.Authorization.authorization = value.toString();
+            HTTP.Proxy.Authorization.waitingForUser.release();
+            return;
+        //#end
+        throw new JSExn("attempted to put unknown property: xwt."+name);
+    }
 
-                        // FIXME: need to ensure that this is putGlobally(), but still run traps...
-                        for(int j=0; j<keys.length; j++) ret.put(keys[j].toString(), null, s.get(keys[j].toString(), s));
+    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 "net.rpc.soap": return new SOAP((String)a, "", (String)b, (String)c);
+                // FIXME support object dumping
+            case "log.debug":    JS.debug(a== null ? "**null**" : a.toString()); return null;
+            case "log.info":     JS.info(a== null ? "**null**" : a.toString()); return null;
+            case "log.warn":     JS.warn(a== null ? "**null**" : a.toString()); return null;
+            case "log.error":    JS.error(a== null ? "**null**" : a.toString()); return null;
+            //#end
+ 
+            switch (nargs) {
+                case 0:
+                    //#switch(name)
+                    case "thread.yield": sleep(0); return null;
+                    //#end
+                    break;
+                case 1:
+                    //#switch(name)
+                    case "clone":
+                        if (!(a instanceof JS.Cloneable)) throw new JSExn("cannot clone a " + a.getClass().getName());
+                        return ((JS.Cloneable)a).jsclone();
+                    case "bless": return bless((JS)a);
+                    case "ui.browser": Platform.newBrowserWindow((String)a); return null;
+                    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": {
+                        String url = (String)a;
+                        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);
+                        throw new JSExn("invalid resource specifier " + url);
                     }
-                return ret;
+                    case "thread.sleep": sleep(JS.toInt(a)); return null;
+                    case "regexp": return new JSRegexp(a, null);
+                    case "net.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": throw new JSExn("not implemented yet"); //return null;
+                    case "stream.parse.xml": new XMLHelper((JS)b).doParse((JS)a); return null;
+                        // FIXME backgrounding
+                    case "stream.parse.utf8": try { return new String(InputStreamToByteArray.convert(Stream.getInputStream(a))); }
+                                              catch (Exception e) { Log.warn(this, e); }
+                    //#end
+                    break;
+                case 2:
+                    //#switch(name)
+                    case "stream.watch": return new Stream.ProgressWatcher((Stream)a, (JS)b);
+                    case "regexp": return new JSRegexp(a, b);
+                    //#end
+                    break;
             }
-        };
-
-    private static final JSFunction sleep = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args != null && (args.length != 1 || args[0] == null)) return null;
-                int i = args == null ? 0 : SpecialBoxProperty.stoi(args[0].toString());
+        } catch (RuntimeException e) {
+            // FIXME: maybe JSExn should take a second argument, Exception
+            Log.warn(this, "xwt."+name+"() threw: " + e);
+            throw new JSExn("invalid argument for xwt object method "+name+"()");
+        }
 
-                Thread thread = Thread.currentThread();
-                if (!(thread instanceof ThreadMessage)) {
-                    if (Log.on) Log.log(this, "cannot sleep() or yield() in the foreground thread");
-                    return null;
-                }
-                ThreadMessage mythread = (ThreadMessage)thread;
-                mythread.done.release();
+        throw new JSExn("invalid number of arguments for xwt object method "+name+"()");
+    }
 
-                if (i > 0) try { Thread.sleep(i); } catch (Exception e) { }
-                
-                MessageQueue.add(mythread);
-                mythread.go.block();
-                return null;
-            }
-        };
+    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
+    }
 
-    private static final JSFunction openFile = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length != 1) return null;
-                String file = Platform.fileDialog(args[0].toString(), false);
-                return file == null ? null : new ByteStream(file);
+    public static void sleep(final int i) throws JSExn {
+        try {
+            final JS.UnpauseCallback callback = JS.pause();
+            final long currentTime = System.currentTimeMillis();
+            // FEATURE use a single sleeper thread
+            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 final JSMath xwtMath = new JSMath() {
+            private JS gs = new JSScope.Global();
+            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);
             }
         };
 
-    private static final JSFunction saveFile = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length != 2) return null;
-                if (!(args[1] instanceof ByteStream)) return null;
-                String file = args[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[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 JavaScriptException("error while writing a ByteStream to a file");
-                }
+    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 static final JSFunction saveFileAs = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args.length != 2) return null;
-                if (!(args[1] instanceof ByteStream)) return null;
-                String file = args[0].toString();
-                file = Platform.fileDialog(file, true);
-                if (file == null) return null;
-                safeFiles.put(Platform.isCaseSensitive() ? file : file.toLowerCase(), new Object());
-                try {
-                    ((ByteStream)args[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 JavaScriptException("error while writing a ByteStream to a file");
-                }
-            }
-        };
+    private class XMLHelper extends XML {
+        private class Wrapper extends XML.Exn { public JSExn wrapee; public Wrapper(JSExn jse) { super(""); wrapee = jse; } }
+        private JS characters, whitespace, endElement, startElement;
+        public XMLHelper(JS b) throws JSExn {
+            super(BUFFER_SIZE);
+            startElement = (JS)b.getAndTriggerTraps("startElement");
+            endElement   = (JS)b.getAndTriggerTraps("endElement");
+            characters   = (JS)b.getAndTriggerTraps("characters");
+            whitespace   = (JS)b.getAndTriggerTraps("whitespace");
+        }
 
-    private static final JSFunction utfEncode = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args == null || args.length != 1) return null;
-                return new ByteStream(args[0].toString().getBytes());
+        public void startElement(XML.Element c) throws XML.Exn { try {
+                JS attrs = new JS();
+                // FIXME attribute URIs? add an additional hash?
+                for(int i=0; i<c.getAttrLen(); i++) attrs.put(c.getAttrKey(i), c.getAttrVal(i));
+                startElement.call(c.getLocalName(), attrs, c.getUri(), null, 3);
+        } catch (JSExn jse) { throw new Wrapper(jse); } }
+
+        public void endElement(XML.Element c) throws XML.Exn { try {
+                endElement.call(c.getLocalName(), c.getUri(), null, null, 2);
+        } catch (JSExn jse) { throw new Wrapper(jse); } }
+
+        public void characters(char[] ch, int start, int length) throws XML.Exn { try {
+                characters.call(new String(ch, start, length), null, null, null, 1);
+        } catch (JSExn jse) { throw new Wrapper(jse); } }
+
+        public void whitespace(char[] ch, int start, int length) throws XML.Exn { try {
+                whitespace.call(new String(ch, start, length), null, null, null, 1);
+        } catch (JSExn jse) { throw new Wrapper(jse); } }
+
+        public void doParse(JS s) throws JSExn {
+            try { 
+                parse(new BufferedReader(new InputStreamReader(Stream.getInputStream(s))));
+            } catch (Wrapper e) {
+                throw e.wrapee;
+            } 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");
             }
-        };
-
-    
-    private static final JSFunction parseHTML = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args == null || args.length != 1 || args[0] == null) return null;
-                try {
-                    if (args[0] instanceof ByteStream) {
-                        return HTML.parseReader(new InputStreamReader(((ByteStream)args[0]).getInputStream()));
-                    } else {
-                        return HTML.parseReader(new StringReader(args[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 JavaScriptException("error while parsing HTML");
-                }
-            }
-        };
-    
-    private static void recurse(String indent, String name, Object o, Context cx) {
-        if (!name.equals("")) name += " : ";
-
-        if (o == null) {
-            Log.log(cx.interpreterSourceFile, indent + name + "<null>");
-
-        } else if (o instanceof NativeArray) {
-            Log.log(cx.interpreterSourceFile, indent + name + "<array>");
-            NativeArray na = (NativeArray)o;
-            for(int i=0; i<na.jsGet_length(); i++)
-                recurse(indent + "  ", i + "", na.get(i, null), cx);
-
-        } else if (!(o instanceof NativeDate) && (o instanceof JSObject || o instanceof ScriptableObject)) {
-            Log.log(cx.interpreterSourceFile, indent + name + "<object>");
-            Scriptable s = (Scriptable)o;
-            Object[] keys = s.getIds();
-            for(int i=0; i<keys.length; i++)
-                recurse(indent + "  ", keys[i].toString(),
-                        keys[i] instanceof Integer ? s.get(((Integer)keys[i]).intValue(), null) : s.get(keys[i].toString(), null), cx);
-
-        } else {
-            Log.log(cx.interpreterSourceFile, indent + name + o);
-
         }
     }
 
-    private static final JSFunction recursivePrintObject = new JSFunction() {
-            public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
-                if (args == null || args.length != 1) return null;
-                recurse("", "", args[0], cx);
+    // FEATURE: move this into builtin.xwar
+    public Blessing bless(JS b) { return new XWT.Blessing((JS.Cloneable)b, this, null, null); }
+    public static class Blessing extends JS.Clone {
+        private XWT xwt;
+        private Template t = null;
+        private Object parentkey = null;
+        private Blessing parent = null;
+        public Blessing(JS.Cloneable clonee, XWT xwt, Blessing parent, Object parentkey) {
+            super(clonee); this.xwt = xwt; this.parentkey = parentkey; this.parent = parent; }
+        public Object get(Object key) throws JSExn {
+            return key.equals("") ? ((Object)getStatic()) : (new Blessing((JS.Cloneable)clonee.get(key), xwt, this, key));
+        }
+        public static Blessing getBlessing(Object o) {
+            if (!(o instanceof JS)) return null;
+            JS js = (JS)o;
+            while (js instanceof JS.Clone && !(js instanceof Blessing)) js = ((JS.Clone)js).getClonee();
+            if (!(js instanceof Blessing)) return null;
+            return (Blessing)js;
+        }
+        public InputStream getImage() throws JSExn {
+            try {
+                InputStream in = Stream.getInputStream(this);
+                if (in != null) return in;
+            } catch (IOException e) { /* DELIBERATE */ }
+            String[] exts = new String[] { ".png", ".jpeg", ".gif" };
+            for (int i=0; i < exts.length; i++)
+                try {
+                    InputStream in = Stream.getInputStream(parent.get(parentkey + exts[i]));
+                    if (in != null) return in;
+                } catch (IOException f) { /* DELIBERATE */ }
+            return null;
+        }
+        public JSScope getStatic() {
+            try {
+                // FIXME background?
+                if (t == null) t = Template.buildTemplate(Stream.getInputStream(parent.get(parentkey + ".xwt")), xwt);
+                return t.staticScope;
+            } catch (Exception e) {
+                Log.error(this, e);
                 return null;
             }
-        };
+        }
+        public Object call(Object a, Object b, Object c, Object[] rest, int nargs) throws JSExn {
+            // GROSS hack
+            if (nargs == 9999) return t;
+            if (nargs != 1) throw new JSExn("FIXME can only call with one arg");
+            getStatic();
+            t.apply((Box)a);
+            return a;
+        }
+    }
 
 }
-
-
-
-
-