1 files changed, 151 insertions, 0 deletions
diff --git a/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java
new file mode 100644
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+++ b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java
@@ -0,0 +1,151 @@
+/* -*- 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):
+ *   Igor Bukanov, igor@fastmail.fm
+ *
+ * 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;
+
+class SpecialRef extends Ref
+{
+    static final long serialVersionUID = -7521596632456797847L;
+
+    private static final int SPECIAL_NONE = 0;
+    private static final int SPECIAL_PROTO = 1;
+    private static final int SPECIAL_PARENT = 2;
+
+    private Scriptable target;
+    private int type;
+    private String name;
+
+    private SpecialRef(Scriptable target, int type, String name)
+    {
+        this.target = target;
+        this.type = type;
+        this.name = name;
+    }
+
+    static Ref createSpecial(Context cx, Object object, String name)
+    {
+        Scriptable target = ScriptRuntime.toObjectOrNull(cx, object);
+        if (target == null) {
+            throw ScriptRuntime.undefReadError(object, name);
+        }
+
+        int type;
+        if (name.equals("__proto__")) {
+            type = SPECIAL_PROTO;
+        } else if (name.equals("__parent__")) {
+            type = SPECIAL_PARENT;
+        } else {
+            throw new IllegalArgumentException(name);
+        }
+
+        if (!cx.hasFeature(Context.FEATURE_PARENT_PROTO_PROPERTIES)) {
+            // Clear special after checking for valid name!
+            type = SPECIAL_NONE;
+        }
+
+        return new SpecialRef(target, type, name);
+    }
+
+    public Object get(Context cx)
+    {
+        switch (type) {
+          case SPECIAL_NONE:
+            return ScriptRuntime.getObjectProp(target, name, cx);
+          case SPECIAL_PROTO:
+            return target.getPrototype();
+          case SPECIAL_PARENT:
+            return target.getParentScope();
+          default:
+            throw Kit.codeBug();
+        }
+    }
+
+    public Object set(Context cx, Object value)
+    {
+        switch (type) {
+          case SPECIAL_NONE:
+            return ScriptRuntime.setObjectProp(target, name, value, cx);
+          case SPECIAL_PROTO:
+          case SPECIAL_PARENT:
+            {
+                Scriptable obj = ScriptRuntime.toObjectOrNull(cx, value);
+                if (obj != null) {
+                    // Check that obj does not contain on its prototype/scope
+                    // chain to prevent cycles
+                    Scriptable search = obj;
+                    do {
+                        if (search == target) {
+                            throw Context.reportRuntimeError1(
+                                "msg.cyclic.value", name);
+                        }
+                        if (type == SPECIAL_PROTO) {
+                            search = search.getPrototype();
+                        } else {
+                            search = search.getParentScope();
+                        }
+                    } while (search != null);
+                }
+                if (type == SPECIAL_PROTO) {
+                    target.setPrototype(obj);
+                } else {
+                    target.setParentScope(obj);
+                }
+                return obj;
+            }
+          default:
+            throw Kit.codeBug();
+        }
+    }
+
+    public boolean has(Context cx)
+    {
+        if (type == SPECIAL_NONE) {
+            return ScriptRuntime.hasObjectElem(target, name, cx);
+        }
+        return true;
+    }
+
+    public boolean delete(Context cx)
+    {
+        if (type == SPECIAL_NONE) {
+            return ScriptRuntime.deleteObjectElem(target, name, cx);
+        }
+        return false;
+    }
+}
+