mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-05 03:54:35 +00:00
3a3ec0cbd5
scrollbars unconditionally, but can now leave out heavyweight widgets like grid, listbox, and tree. r=bzbarsky, sr=alecf.
209 lines
6.3 KiB
C++
209 lines
6.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsAreaFrame.h"
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#include "nsBlockBandData.h"
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#include "nsStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIPresContext.h"
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#include "nsIViewManager.h"
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#include "nsHTMLAtoms.h"
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#include "nsIView.h"
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#include "nsHTMLValue.h"
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#include "nsHTMLParts.h"
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#include "nsLayoutAtoms.h"
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#ifdef MOZ_XUL
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#include "nsINameSpaceManager.h"
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#include "nsXULAtoms.h"
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#include "nsIEventStateManager.h"
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#endif
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#undef NOISY_MAX_ELEMENT_SIZE
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#undef NOISY_FINAL_SIZE
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nsresult
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NS_NewAreaFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsAreaFrame* it = new (aPresShell) nsAreaFrame;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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it->SetFlags(aFlags);
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*aNewFrame = it;
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return NS_OK;
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}
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nsAreaFrame::nsAreaFrame()
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{
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}
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#ifdef MOZ_XUL
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// If you make changes to this function, check its counterparts
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// in nsBoxFrame and nsTextBoxFrame
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nsresult
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nsAreaFrame::RegUnregAccessKey(nsIPresContext* aPresContext,
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PRBool aDoReg)
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{
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// if we have no content, we can't do anything
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if (!mContent)
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return NS_ERROR_FAILURE;
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PRBool isXUL = mContent->IsContentOfType(nsIContent::eXUL);
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if (!isXUL)
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return NS_OK;
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// find out what type of element this is
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nsCOMPtr<nsIAtom> atom;
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nsresult rv = mContent->GetTag(*getter_AddRefs(atom));
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if (NS_FAILED(rv))
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return rv;
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// only support accesskeys for the following elements
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if (atom != nsXULAtoms::label)
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return NS_OK;
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// To filter out <label>s without a control attribute.
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// XXXjag a side-effect is that we filter out anonymous <label>s
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// in e.g. <menu>, <menuitem>, <button>. These <label>s inherit
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// |accesskey| and would otherwise register themselves, overwriting
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// the content we really meant to be registered.
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if (!mContent->HasAttr(kNameSpaceID_None, nsXULAtoms::control))
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return NS_OK;
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nsAutoString accessKey;
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mContent->GetAttr(kNameSpaceID_None, nsXULAtoms::accesskey, accessKey);
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if (accessKey.IsEmpty())
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return NS_OK;
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// With a valid PresContext we can get the ESM
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// and register the access key
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nsCOMPtr<nsIEventStateManager> esm;
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aPresContext->GetEventStateManager(getter_AddRefs(esm));
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rv = NS_OK;
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if (esm) {
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PRUint32 key = accessKey.First();
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if (aDoReg)
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rv = esm->RegisterAccessKey(mContent, key);
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else
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rv = esm->UnregisterAccessKey(mContent, key);
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}
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return rv;
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}
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#endif
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/////////////////////////////////////////////////////////////////////////////
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// nsIFrame
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#ifdef MOZ_XUL
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NS_IMETHODIMP
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nsAreaFrame::Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsStyleContext* aContext,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv = nsBlockFrame::Init(aPresContext,
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aContent,
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aParent,
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aContext,
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aPrevInFlow);
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if (NS_FAILED(rv))
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return rv;
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// register access key
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return RegUnregAccessKey(aPresContext, PR_TRUE);
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}
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NS_IMETHODIMP
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nsAreaFrame::Destroy(nsIPresContext* aPresContext)
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{
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// unregister access key
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RegUnregAccessKey(aPresContext, PR_FALSE);
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return nsBlockFrame::Destroy(aPresContext);
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}
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NS_IMETHODIMP
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nsAreaFrame::AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType,
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PRInt32 aHint)
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{
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nsresult rv = nsBlockFrame::AttributeChanged(aPresContext, aChild,
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aNameSpaceID, aAttribute,
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aModType, aHint);
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// If the accesskey changed, register for the new value
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// The old value has been unregistered in nsXULElement::SetAttr
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if (aAttribute == nsXULAtoms::accesskey || aAttribute == nsXULAtoms::control)
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RegUnregAccessKey(aPresContext, PR_TRUE);
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return rv;
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}
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#endif
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NS_IMETHODIMP
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nsAreaFrame::GetFrameType(nsIAtom** aType) const
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{
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NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
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*aType = nsLayoutAtoms::areaFrame;
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NS_ADDREF(*aType);
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return NS_OK;
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}
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/////////////////////////////////////////////////////////////////////////////
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// Diagnostics
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#ifdef NS_DEBUG
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NS_IMETHODIMP
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nsAreaFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("Area"), aResult);
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}
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#endif
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