new module

content/html/content/src/GenericElementCollection.cpp

@@ -0,0 +1,124 @@
+/* -*- 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 1.0 (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 Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+
+#include "GenericElementCollection.h"
+#include "nsIDOMElement.h"
+#include "nsGenericHTMLElement.h"
+
+GenericElementCollection::GenericElementCollection(nsIContent *aParent, 
+                                                   nsIAtom *aTag)
+  : nsGenericDOMHTMLCollection()
+{
+  mParent = aParent;
+  mTag = aTag;
+}
+
+GenericElementCollection::~GenericElementCollection()
+{
+  // we do NOT have a ref-counted reference to mParent, so do NOT release it!
+  // this is to avoid circular references.  The instantiator who provided mParent
+  // is responsible for managing our reference for us.
+  NS_IF_RELEASE(mTag);
+}
+
+// we re-count every call.  A better implementation would be to set ourselves up as
+// an observer of contentAppended, contentInserted, and contentDeleted
+NS_IMETHODIMP 
+GenericElementCollection::GetLength(PRUint32* aLength)
+{
+  if (nsnull==aLength)
+    return NS_ERROR_NULL_POINTER;
+  *aLength=0;
+  nsresult result = NS_OK;
+  if (nsnull!=mParent)
+  {
+    nsIContent *child=nsnull;
+    PRUint32 childIndex=0;
+    mParent->ChildAt(childIndex, child);
+    while (nsnull!=child)
+    {
+      nsIAtom *childTag;
+      child->GetTag(childTag);
+      if (mTag==childTag)
+      {
+        (*aLength)++;
+      }
+      NS_RELEASE(childTag);
+      NS_RELEASE(child);
+      childIndex++;
+      mParent->ChildAt(childIndex, child);
+    }
+  }
+  return result;
+}
+
+NS_IMETHODIMP 
+GenericElementCollection::Item(PRUint32 aIndex, nsIDOMNode** aReturn)
+{
+  *aReturn=nsnull;
+  PRUint32 index = 0;
+  nsresult rv = NS_OK;
+  if (nsnull!=mParent)
+  {
+    nsIContent *child=nsnull;
+    PRUint32 childIndex=0;
+    mParent->ChildAt(childIndex, child);
+    while (nsnull!=child)
+    {
+      nsIAtom *childTag;
+      child->GetTag(childTag);
+      if (mTag==childTag)
+      {
+        if (aIndex==index)
+        {
+          child->QueryInterface(kIDOMNodeIID, (void**)aReturn);   // out-param addref
+          NS_ASSERTION(nsnull!=aReturn, "content element must be an nsIDOMNode");
+          NS_RELEASE(childTag);
+          NS_RELEASE(child);
+          break;
+        }
+        index++;
+      }
+      NS_RELEASE(childTag);
+      NS_RELEASE(child);
+      childIndex++;
+      mParent->ChildAt(childIndex, child);
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP 
+GenericElementCollection::NamedItem(const nsString& aName, nsIDOMNode** aReturn)
+{
+  nsresult rv = NS_OK;
+  if (nsnull!=mParent)
+  {
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+GenericElementCollection::ParentDestroyed()
+{
+  // see comment in destructor, do NOT release mParent!
+  mParent = nsnull;
+  return NS_OK;
+}
+

content/html/content/src/GenericElementCollection.h

@@ -0,0 +1,51 @@
+/* -*- 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 1.0 (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 Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+
+#ifndef GenericElementCollection_h__
+#define GenericElementCollection_h__
+
+#include "nsGenericDOMHTMLCollection.h"
+
+class nsIContent;
+class nsIAtom;
+
+/**
+ * This class provides a late-bound collection of elements that are
+ * direct decendents of an element.
+ * mParent is NOT ref-counted to avoid circular references
+ */
+class GenericElementCollection : public nsGenericDOMHTMLCollection 
+{
+public:
+  GenericElementCollection(nsIContent *aParent, 
+                         nsIAtom *aTag);
+  virtual ~GenericElementCollection();
+
+  NS_IMETHOD    GetLength(PRUint32* aLength);
+  NS_IMETHOD    Item(PRUint32 aIndex, nsIDOMNode** aReturn);
+  NS_IMETHOD    NamedItem(const nsString& aName, nsIDOMNode** aReturn);
+
+  NS_IMETHOD    ParentDestroyed();
+
+protected:
+  nsIContent * mParent;
+  nsIAtom * mTag;
+};
+
+#endif

layout/html/content/src/GenericElementCollection.cpp

@@ -0,0 +1,124 @@
+/* -*- 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 1.0 (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 Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+
+#include "GenericElementCollection.h"
+#include "nsIDOMElement.h"
+#include "nsGenericHTMLElement.h"
+
+GenericElementCollection::GenericElementCollection(nsIContent *aParent, 
+                                                   nsIAtom *aTag)
+  : nsGenericDOMHTMLCollection()
+{
+  mParent = aParent;
+  mTag = aTag;
+}
+
+GenericElementCollection::~GenericElementCollection()
+{
+  // we do NOT have a ref-counted reference to mParent, so do NOT release it!
+  // this is to avoid circular references.  The instantiator who provided mParent
+  // is responsible for managing our reference for us.
+  NS_IF_RELEASE(mTag);
+}
+
+// we re-count every call.  A better implementation would be to set ourselves up as
+// an observer of contentAppended, contentInserted, and contentDeleted
+NS_IMETHODIMP 
+GenericElementCollection::GetLength(PRUint32* aLength)
+{
+  if (nsnull==aLength)
+    return NS_ERROR_NULL_POINTER;
+  *aLength=0;
+  nsresult result = NS_OK;
+  if (nsnull!=mParent)
+  {
+    nsIContent *child=nsnull;
+    PRUint32 childIndex=0;
+    mParent->ChildAt(childIndex, child);
+    while (nsnull!=child)
+    {
+      nsIAtom *childTag;
+      child->GetTag(childTag);
+      if (mTag==childTag)
+      {
+        (*aLength)++;
+      }
+      NS_RELEASE(childTag);
+      NS_RELEASE(child);
+      childIndex++;
+      mParent->ChildAt(childIndex, child);
+    }
+  }
+  return result;
+}
+
+NS_IMETHODIMP 
+GenericElementCollection::Item(PRUint32 aIndex, nsIDOMNode** aReturn)
+{
+  *aReturn=nsnull;
+  PRUint32 index = 0;
+  nsresult rv = NS_OK;
+  if (nsnull!=mParent)
+  {
+    nsIContent *child=nsnull;
+    PRUint32 childIndex=0;
+    mParent->ChildAt(childIndex, child);
+    while (nsnull!=child)
+    {
+      nsIAtom *childTag;
+      child->GetTag(childTag);
+      if (mTag==childTag)
+      {
+        if (aIndex==index)
+        {
+          child->QueryInterface(kIDOMNodeIID, (void**)aReturn);   // out-param addref
+          NS_ASSERTION(nsnull!=aReturn, "content element must be an nsIDOMNode");
+          NS_RELEASE(childTag);
+          NS_RELEASE(child);
+          break;
+        }
+        index++;
+      }
+      NS_RELEASE(childTag);
+      NS_RELEASE(child);
+      childIndex++;
+      mParent->ChildAt(childIndex, child);
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP 
+GenericElementCollection::NamedItem(const nsString& aName, nsIDOMNode** aReturn)
+{
+  nsresult rv = NS_OK;
+  if (nsnull!=mParent)
+  {
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+GenericElementCollection::ParentDestroyed()
+{
+  // see comment in destructor, do NOT release mParent!
+  mParent = nsnull;
+  return NS_OK;
+}
+

layout/html/content/src/GenericElementCollection.h

@@ -0,0 +1,51 @@
+/* -*- 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 1.0 (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 Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+
+#ifndef GenericElementCollection_h__
+#define GenericElementCollection_h__
+
+#include "nsGenericDOMHTMLCollection.h"
+
+class nsIContent;
+class nsIAtom;
+
+/**
+ * This class provides a late-bound collection of elements that are
+ * direct decendents of an element.
+ * mParent is NOT ref-counted to avoid circular references
+ */
+class GenericElementCollection : public nsGenericDOMHTMLCollection 
+{
+public:
+  GenericElementCollection(nsIContent *aParent, 
+                         nsIAtom *aTag);
+  virtual ~GenericElementCollection();
+
+  NS_IMETHOD    GetLength(PRUint32* aLength);
+  NS_IMETHOD    Item(PRUint32 aIndex, nsIDOMNode** aReturn);
+  NS_IMETHOD    NamedItem(const nsString& aName, nsIDOMNode** aReturn);
+
+  NS_IMETHOD    ParentDestroyed();
+
+protected:
+  nsIContent * mParent;
+  nsIAtom * mTag;
+};
+
+#endif