// Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL]
package org.xwt;
-import org.xwt.util.*;
import java.util.*;
-import org.mozilla.javascript.*;
+import org.xwt.js.*;
+import org.xwt.util.*;
/**
* This class encapsulates a single trap placed on a given node. The
// Static Data //////////////////////////////////////////////////////////////
+ /** the arguments.cascade() function */
+ public static final JS.Callable cascadeFunction = new JS.Callable() {
+ public Object call(JS.Array args) {
+ Trap currentTrap = TrapContext.get().currentTrap;
+ if (args.length() != 0) TrapContext.get().putCascadeHappened = true;
+ Trap t = currentTrap.next;
+ // if we've hit the end of the trap stack, just do a put(,,,true)
+ if (t == null) {
+ if (args.length() == 0) return currentTrap.trapee.get(currentTrap.name, true);
+ currentTrap.trapee.put(currentTrap.name, args.elementAt(0), true);
+ return null;
+ }
+ return t.perform(args);
+ }
+ };
+
/** a vector of weak references to all instances of Trap; used for retheming */
private static Hashtable allTraps = new Hashtable(1000);
private Box trapee = null;
/** If this trap was actually placed on a root proxy, this is a reference to the proxy */
- private Scriptable rp = null;
+ private JS rp = null;
/** the function for this trap */
- Function f = null;
+ JS.CompiledFunction f = null;
/** the name of the property that this trap was placed on */
private String name = null;
* @param isreadtrap true iff this is a read (double-underscore) trap
* @param rp if this trap is being placed via a rootproxy, this is that proxy object.
*/
- static void addTrap(Box trapee, String name, Function f, boolean isreadtrap, Scriptable rp) {
+ static void addTrap(Box trapee, String name, JS.CompiledFunction f, boolean isreadtrap, JS rp) {
if (PROHIBITED.get(name) != null || name.startsWith("xwt_")) {
- System.out.println("Error: you cannot place traps on special property \"" + name + "\"");
+ Log.log(Trap.class, "Error: you cannot place traps on special property \"" + name + "\"");
return;
}
// find out what script is currently running
- String placerNodeName = JSObject.getCurrentFunctionSourceName();
+ JS.CompiledFunction placer = JS.Thread.fromJavaThread(java.lang.Thread.currentThread()).getCurrentCompiledFunction();
+ if (placer == null) { Log.log(Trap.class, "placer is null"); return; }
+ String placerNodeName = placer.getSourceName();
// check if this script has already placed a trap on this property
if (trapee.traps == null) trapee.traps = new Hash(10, 3);
public static Trap getTrap(Box b, String name) {
if (b.traps == null) return null;
- String currentFunctionNodeName = JSObject.getCurrentFunctionSourceName();
+ String currentFunctionNodeName = JS.Thread.fromJavaThread(java.lang.Thread.currentThread()).getCurrentCompiledFunction().getSourceName();
for(Trap cur = (Trap)b.traps.get(name); cur != null; cur = cur.next)
if (cur.placerNodeName.equals(currentFunctionNodeName))
return cur;
return null;
}
- /** Called by Rhino's arguments.cascade. Note: cx will be null if this was invoked from perform() rather than from a script. */
- public static final Function cascadeFunction = new CascadeFunction();
- private static class CascadeFunction extends JSObject implements Function {
- CascadeFunction() { setSeal(true); }
- public Scriptable construct(Context cx, Scriptable scope, java.lang.Object[] args) { return null; }
- public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) {
- Trap currentTrap = TrapContext.get().currentTrap;
- if (currentTrap == null || (cx != null && Context.getCurrentContext().currentFunction != currentTrap.f)) {
- if (Log.on) Log.log(this, "attempt to cascade() by a function that was not invoked as a trap at " +
- cx.interpreterSourceFile + ":" + cx.interpreterLine);
- return null;
- }
- if (args.length != 0) TrapContext.get().putCascadeHappened = true;
- Trap t = currentTrap.next;
- // if we've hit the end of the trap stack, just do a put(,,,true)
- if (t == null) {
- if (args.length == 0) return currentTrap.trapee.get(currentTrap.name, currentTrap.trapee, true);
- currentTrap.trapee.put(currentTrap.name, currentTrap.trapee, args[0], true);
- return null;
- }
- return t.perform(args);
- }
- };
-
/** called by Rhino's arguments.trapee hack */
public static Object currentTrapee() {
Trap current = TrapContext.get().currentTrap;
else return current.trapee;
}
- /** removes all traps whose function's ultimate parent scope is <tt>b</tt>. Used for retheming */
- public static void removeAllTrapsByBox(Box b) {
- Enumeration e = allTraps.keys();
- while(e.hasMoreElements()) {
- Weak w = (Weak)e.nextElement();
- Trap t = (Trap)w.get();
- if (t == null) {
- allTraps.remove(w);
- continue;
- }
- for(Scriptable cur = t.f; cur != null; cur = cur.getParentScope()) {
- if (cur == b) {
- t.delete();
- break;
- }
- }
- }
+ /** called by Rhino's arguments.trapname hack */
+ public static String currentTrapname() {
+ Trap current = TrapContext.get().currentTrap;
+ if (current == null) return null;
+ else return current.name;
}
private Trap() { allTraps.put(myWeak, dummy); }
/** perform this trap -- arg.length == 0 if this is a get; otherwise it contains a single element to be put */
- public Object perform(Object[] arg) {
+ public Object perform(JS.Array args) {
TrapContext tc = TrapContext.get();
// save both thread-locals on the stack and update their values
// invoke the trap function
try {
- if (!isreadtrap && arg.length == 0) return cascadeFunction.call(null, null, null, arg);
+ if (!isreadtrap && args.length() == 0) return cascadeFunction.call(args);
if (f == null) {
if (Log.verbose) Log.log(this, "debug: reclaimed a dangling trap on property " + name);
- Object ret = cascadeFunction.call(null, null, null, arg);
+ Object ret = cascadeFunction.call(args);
delete();
return ret;
}
- Object ret = f.call(Context.enter(), f.getParentScope(), f.getParentScope(), arg);
+ Object ret = f.call(args);
// autocascade if required
- if (arg.length > 0 && !isreadtrap && !tc.putCascadeHappened) cascadeFunction.call(null, null, null, arg);
+ if (args.length() > 0 && !isreadtrap && !tc.putCascadeHappened) cascadeFunction.call(args);
return ret;
- } catch (EcmaError e) {
- if (Log.on) Log.log(this, "WARNING: uncaught interpreter exception: " + e.getMessage());
- if (Log.on) Log.log(this, " thrown from within trap '" + name + "' at " + e.getSourceName() + ":" + e.getLineNumber());
- } catch (JavaScriptException e) {
- if (Log.on) Log.log(this, "WARNING: uncaught ecmascript exception: " + e.getMessage());
- if (Log.on) Log.log(this, " thrown from within trap '" + name + "' at " + e.sourceFile + ":" + e.line);
+ } catch (JS.Exn e) {
+ if (Log.on) Log.log(this, e);
+
} finally {
// restore the thread-locals
tc.putCascadeHappened = save_putCascadeHappened;
/** returns the TrapContext for the current thread */
static TrapContext get() {
- TrapContext ret = (TrapContext)trapContextByThread.get(Thread.currentThread());
+ TrapContext ret = (TrapContext)trapContextByThread.get(java.lang.Thread.currentThread());
if (ret == null) {
ret = new TrapContext();
trapContextByThread.put(Thread.currentThread(), ret);
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