bits of dom's nsJSUtils copied here to avoid linking with that lib. bug 67368 r=hyatt,pinkerton

embedding/components/windowwatcher/src/nsWWJSUtils.cpp

@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape 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/NPL/
+ *
+ * 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 mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 2001 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ */
+
+/* This file is a small subset of nsJSUtils utility functions,
+   from the dom directory.
+*/
+
+#include "nsCOMPtr.h"
+#include "nsIScriptContext.h"
+#include "nsIScriptGlobalObject.h"
+#include "nsWWJSUtils.h"
+
+NS_EXPORT nsresult 
+nsWWJSUtils::nsGetStaticScriptGlobal(JSContext* aContext,
+                                   JSObject* aObj,
+                                   nsIScriptGlobalObject** aNativeGlobal)
+{
+  nsISupports* supports;
+  JSClass* clazz;
+  JSObject* parent;
+  JSObject* glob = aObj; // starting point for search
+
+  if (!glob)
+    return NS_ERROR_FAILURE;
+
+  while (nsnull != (parent = JS_GetParent(aContext, glob)))
+    glob = parent;
+
+#ifdef JS_THREADSAFE
+  clazz = JS_GetClass(aContext, glob);
+#else
+  clazz = JS_GetClass(glob);
+#endif
+
+  if (!clazz ||
+      !(clazz->flags & JSCLASS_HAS_PRIVATE) ||
+      !(clazz->flags & JSCLASS_PRIVATE_IS_NSISUPPORTS) ||
+      !(supports = (nsISupports*) JS_GetPrivate(aContext, glob))) {
+    return NS_ERROR_FAILURE;
+  }
+
+  return supports->QueryInterface(NS_GET_IID(nsIScriptGlobalObject),
+                                  (void**) aNativeGlobal);
+}
+
+NS_EXPORT nsresult 
+nsWWJSUtils::nsGetDynamicScriptContext(JSContext *aContext,
+                                     nsIScriptContext** aScriptContext)
+{
+  // XXX We rely on the rule that if any JSContext in our JSRuntime has a 
+  // private set then that private *must* be a pointer to an nsISupports.
+  nsISupports *supports = (nsIScriptContext*) JS_GetContextPrivate(aContext);
+  if (!supports)
+      return nsnull;
+  return supports->QueryInterface(NS_GET_IID(nsIScriptContext),
+                                  (void**)aScriptContext);
+}
+
+NS_EXPORT nsresult 
+nsWWJSUtils::nsGetStaticScriptContext(JSContext* aContext,
+                                    JSObject* aObj,
+                                    nsIScriptContext** aScriptContext)
+{
+  nsCOMPtr<nsIScriptGlobalObject> nativeGlobal;
+  nsGetStaticScriptGlobal(aContext, aObj, getter_AddRefs(nativeGlobal));
+  if (!nativeGlobal)    
+    return NS_ERROR_FAILURE;
+  nsIScriptContext* scriptContext = nsnull;
+  nativeGlobal->GetContext(&scriptContext);
+  *aScriptContext = scriptContext;
+  return scriptContext ? NS_OK : NS_ERROR_FAILURE;
+}  
+

embedding/components/windowwatcher/src/nsWWJSUtils.h

@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape 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/NPL/
+ *
+ * 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 mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 2001 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ */
+
+#ifndef nsWWJSUtils_h__
+#define nsWWJSUtils_h__
+
+/**
+ * Utility functions copied from nsJSUtils in dom/src/base.
+ */
+
+#include "nsISupports.h"
+#include "jsapi.h"
+
+class nsIScriptContext;
+class nsIScriptGlobalObject;
+
+class nsWWJSUtils {
+public:
+  static NS_EXPORT nsresult nsGetStaticScriptGlobal(JSContext* aContext,
+                                    JSObject* aObj,
+                                    nsIScriptGlobalObject** aNativeGlobal);
+
+  static NS_EXPORT nsresult nsGetStaticScriptContext(JSContext* aContext,
+                                    JSObject* aObj,
+                                    nsIScriptContext** aScriptContext);
+
+  static NS_EXPORT nsresult nsGetDynamicScriptGlobal(JSContext *aContext,
+                                    nsIScriptGlobalObject** aNativeGlobal);
+
+  static NS_EXPORT nsresult nsGetDynamicScriptContext(JSContext *aContext,
+                                    nsIScriptContext** aScriptContext);
+};
+
+#endif /* nsWWJSUtils_h__ */