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+/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Rhino code, released
+ * May 6, 1999.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1997-1999
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Norris Boyd
+ * Igor Bukanov
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU General Public License Version 2 or later (the "GPL"), in which
+ * case the provisions of the GPL are applicable instead of those above. If
+ * you wish to allow use of your version of this file only under the terms of
+ * the GPL and not to allow others to use your version of this file under the
+ * MPL, indicate your decision by deleting the provisions above and replacing
+ * them with the notice and other provisions required by the GPL. If you do
+ * not delete the provisions above, a recipient may use your version of this
+ * file under either the MPL or the GPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+package org.mozilla.javascript;
+
+import java.io.Serializable;
+
+/**
+ * This class implements the object lookup required for the
+ * <code>with</code> statement.
+ * It simply delegates every action to its prototype except
+ * for operations on its parent.
+ */
+public class NativeWith implements Scriptable, IdFunctionCall, Serializable {
+
+ private static final long serialVersionUID = 1L;
+
+ static void init(Scriptable scope, boolean sealed)
+ {
+ NativeWith obj = new NativeWith();
+
+ obj.setParentScope(scope);
+ obj.setPrototype(ScriptableObject.getObjectPrototype(scope));
+
+ IdFunctionObject ctor = new IdFunctionObject(obj, FTAG, Id_constructor,
+ "With", 0, scope);
+ ctor.markAsConstructor(obj);
+ if (sealed) {
+ ctor.sealObject();
+ }
+ ctor.exportAsScopeProperty();
+ }
+
+ private NativeWith() {
+ }
+
+ protected NativeWith(Scriptable parent, Scriptable prototype) {
+ this.parent = parent;
+ this.prototype = prototype;
+ }
+
+ public String getClassName() {
+ return "With";
+ }
+
+ public boolean has(String id, Scriptable start)
+ {
+ return prototype.has(id, prototype);
+ }
+
+ public boolean has(int index, Scriptable start)
+ {
+ return prototype.has(index, prototype);
+ }
+
+ public Object get(String id, Scriptable start)
+ {
+ if (start == this)
+ start = prototype;
+ return prototype.get(id, start);
+ }
+
+ public Object get(int index, Scriptable start)
+ {
+ if (start == this)
+ start = prototype;
+ return prototype.get(index, start);
+ }
+
+ public void put(String id, Scriptable start, Object value)
+ {
+ if (start == this)
+ start = prototype;
+ prototype.put(id, start, value);
+ }
+
+ public void put(int index, Scriptable start, Object value)
+ {
+ if (start == this)
+ start = prototype;
+ prototype.put(index, start, value);
+ }
+
+ public void delete(String id)
+ {
+ prototype.delete(id);
+ }
+
+ public void delete(int index)
+ {
+ prototype.delete(index);
+ }
+
+ public Scriptable getPrototype() {
+ return prototype;
+ }
+
+ public void setPrototype(Scriptable prototype) {
+ this.prototype = prototype;
+ }
+
+ public Scriptable getParentScope() {
+ return parent;
+ }
+
+ public void setParentScope(Scriptable parent) {
+ this.parent = parent;
+ }
+
+ public Object[] getIds() {
+ return prototype.getIds();
+ }
+
+ public Object getDefaultValue(Class typeHint) {
+ return prototype.getDefaultValue(typeHint);
+ }
+
+ public boolean hasInstance(Scriptable value) {
+ return prototype.hasInstance(value);
+ }
+
+ /**
+ * Must return null to continue looping or the final collection result.
+ */
+ protected Object updateDotQuery(boolean value)
+ {
+ // NativeWith itself does not support it
+ throw new IllegalStateException();
+ }
+
+ public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
+ Scriptable thisObj, Object[] args)
+ {
+ if (f.hasTag(FTAG)) {
+ if (f.methodId() == Id_constructor) {
+ throw Context.reportRuntimeError1("msg.cant.call.indirect", "With");
+ }
+ }
+ throw f.unknown();
+ }
+
+ static boolean isWithFunction(Object functionObj)
+ {
+ if (functionObj instanceof IdFunctionObject) {
+ IdFunctionObject f = (IdFunctionObject)functionObj;
+ return f.hasTag(FTAG) && f.methodId() == Id_constructor;
+ }
+ return false;
+ }
+
+ static Object newWithSpecial(Context cx, Scriptable scope, Object[] args)
+ {
+ ScriptRuntime.checkDeprecated(cx, "With");
+ scope = ScriptableObject.getTopLevelScope(scope);
+ NativeWith thisObj = new NativeWith();
+ thisObj.setPrototype(args.length == 0
+ ? ScriptableObject.getClassPrototype(scope,
+ "Object")
+ : ScriptRuntime.toObject(cx, scope, args[0]));
+ thisObj.setParentScope(scope);
+ return thisObj;
+ }
+
+ private static final Object FTAG = new Object();
+
+ private static final int
+ Id_constructor = 1;
+
+ protected Scriptable prototype;
+ protected Scriptable parent;
+}