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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsAreaFrame.h"
#include "nsBlockBandData.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsPresContext.h"
#include "nsIViewManager.h"
#include "nsINodeInfo.h"
#include "nsHTMLAtoms.h"
#include "nsIView.h"
#include "nsHTMLParts.h"
#include "nsLayoutAtoms.h"
#ifdef MOZ_XUL
#include "nsINameSpaceManager.h"
#include "nsXULAtoms.h"
#include "nsIEventStateManager.h"
#endif
#undef NOISY_MAX_ELEMENT_SIZE
#undef NOISY_FINAL_SIZE
nsresult
NS_NewAreaFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsAreaFrame* it = new (aPresShell) nsAreaFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
it->SetFlags(aFlags);
*aNewFrame = it;
return NS_OK;
}
nsAreaFrame::nsAreaFrame()
{
}
#ifdef MOZ_XUL
// If you make changes to this function, check its counterparts
// in nsBoxFrame and nsTextBoxFrame
nsresult
nsAreaFrame::RegUnregAccessKey(nsPresContext* aPresContext,
PRBool aDoReg)
{
// if we have no content, we can't do anything
if (!mContent)
return NS_ERROR_FAILURE;
nsINodeInfo *ni = mContent->GetNodeInfo();
// only support accesskeys for the following elements
if (!ni || !ni->Equals(nsXULAtoms::label, kNameSpaceID_XUL))
return NS_OK;
// To filter out <label>s without a control attribute.
// XXXjag a side-effect is that we filter out anonymous <label>s
// in e.g. <menu>, <menuitem>, <button>. These <label>s inherit
// |accesskey| and would otherwise register themselves, overwriting
// the content we really meant to be registered.
if (!mContent->HasAttr(kNameSpaceID_None, nsXULAtoms::control))
return NS_OK;
nsAutoString accessKey;
mContent->GetAttr(kNameSpaceID_None, nsXULAtoms::accesskey, accessKey);
if (accessKey.IsEmpty())
return NS_OK;
// With a valid PresContext we can get the ESM
// and register the access key
nsIEventStateManager *esm = aPresContext->EventStateManager();
nsresult rv;
PRUint32 key = accessKey.First();
if (aDoReg)
rv = esm->RegisterAccessKey(mContent, key);
else
rv = esm->UnregisterAccessKey(mContent, key);
return rv;
}
#endif
/////////////////////////////////////////////////////////////////////////////
// nsIFrame
#ifdef MOZ_XUL
NS_IMETHODIMP
nsAreaFrame::Init(nsPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
nsresult rv = nsBlockFrame::Init(aPresContext,
aContent,
aParent,
aContext,
aPrevInFlow);
if (NS_FAILED(rv))
return rv;
// register access key
return RegUnregAccessKey(aPresContext, PR_TRUE);
}
NS_IMETHODIMP
nsAreaFrame::Destroy(nsPresContext* aPresContext)
{
// unregister access key
RegUnregAccessKey(aPresContext, PR_FALSE);
return nsBlockFrame::Destroy(aPresContext);
}
NS_IMETHODIMP
nsAreaFrame::AttributeChanged(nsIContent* aChild,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
nsresult rv = nsBlockFrame::AttributeChanged(aChild, aNameSpaceID,
aAttribute, aModType);
// If the accesskey changed, register for the new value
// The old value has been unregistered in nsXULElement::SetAttr
if (aAttribute == nsXULAtoms::accesskey || aAttribute == nsXULAtoms::control)
RegUnregAccessKey(GetPresContext(), PR_TRUE);
return rv;
}
#endif
nsIAtom*
nsAreaFrame::GetType() const
{
return nsLayoutAtoms::areaFrame;
}
/////////////////////////////////////////////////////////////////////////////
// Diagnostics
#ifdef NS_DEBUG
NS_IMETHODIMP
nsAreaFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("Area"), aResult);
}
#endif
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