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new module

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buster%netscape.com 1998-11-17 22:20:59 +00:00
parent 23aef81b0b
commit 63d84c5b52
4 changed files with 350 additions and 0 deletions
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124
content/html/content/src/GenericElementCollection.cpp Normal file
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/* -*- 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;
}

51
content/html/content/src/GenericElementCollection.h Normal file
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/* -*- 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

124
layout/html/content/src/GenericElementCollection.cpp Normal file
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/* -*- 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;
}

51
layout/html/content/src/GenericElementCollection.h Normal file
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/* -*- 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