gecko-dev/layout/forms/nsLegendFrame.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * 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 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 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 NPL, 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 NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

// YY need to pass isMultiple before create called

#include "nsLegendFrame.h"
#include "nsIDOMNode.h"
#include "nsIDOMHTMLLegendElement.h"
#include "nsCSSRendering.h"
#include "nsIContent.h"
#include "nsIFrame.h"
#include "nsISupports.h"
#include "nsIAtom.h"
#include "nsIHTMLContent.h"
#include "nsHTMLParts.h"
#include "nsHTMLAtoms.h"
#include "nsLayoutAtoms.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsFont.h"
#include "nsFormControlFrame.h"

static NS_DEFINE_IID(kLegendFrameCID, NS_LEGEND_FRAME_CID);
 
nsresult
NS_NewLegendFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
  NS_PRECONDITION(aNewFrame, "null OUT ptr");
  if (nsnull == aNewFrame) {
    return NS_ERROR_NULL_POINTER;
  }
  nsLegendFrame* it = new (aPresShell) nsLegendFrame;
  if (!it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  *aNewFrame = it;
  return NS_OK;
}

nsLegendFrame::nsLegendFrame()
  : nsAreaFrame()
{
  mPresContext    = nsnull;
}

nsLegendFrame::~nsLegendFrame()
{
}

NS_IMETHODIMP
nsLegendFrame::GetFrameType(nsIAtom** aType) const
{
  NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
  *aType = nsLayoutAtoms::legendFrame; 
  NS_ADDREF(*aType);
  return NS_OK;
}

NS_IMETHODIMP
nsLegendFrame::Destroy(nsIPresContext *aPresContext)
{
  nsFormControlFrame::RegUnRegAccessKey(aPresContext, NS_STATIC_CAST(nsIFrame*, this), PR_FALSE);
  return nsAreaFrame::Destroy(aPresContext);
}

// Frames are not refcounted, no need to AddRef
NS_IMETHODIMP
nsLegendFrame::QueryInterface(REFNSIID aIID, void** aInstancePtrResult)
{
  NS_PRECONDITION(nsnull != aInstancePtrResult, "null pointer");
  if (nsnull == aInstancePtrResult) {
    return NS_ERROR_NULL_POINTER;
  }
  if (aIID.Equals(kLegendFrameCID)) {
    *aInstancePtrResult = (void*) ((nsLegendFrame*)this);
    return NS_OK;
  }
  return nsHTMLContainerFrame::QueryInterface(aIID, aInstancePtrResult);
}

NS_IMETHODIMP 
nsLegendFrame::Reflow(nsIPresContext*          aPresContext,
                     nsHTMLReflowMetrics&     aDesiredSize,
                     const nsHTMLReflowState& aReflowState,
                     nsReflowStatus&          aStatus)
{
  DO_GLOBAL_REFLOW_COUNT("nsLegendFrame", aReflowState.reason);
  DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
  if (eReflowReason_Initial == aReflowState.reason) {
    mPresContext = aPresContext;
    nsFormControlFrame::RegUnRegAccessKey(aPresContext, NS_STATIC_CAST(nsIFrame*, this), PR_TRUE);
  } 
  return nsAreaFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
}


NS_IMETHODIMP
nsLegendFrame::Paint(nsIPresContext*      aPresContext,
                     nsIRenderingContext& aRenderingContext,
                     const nsRect&        aDirtyRect,
                     nsFramePaintLayer    aWhichLayer,
                     PRUint32             aFlags)
{
  PRBool isVisible;
  if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible)) && !isVisible) {
    return NS_OK;
  }
  return nsAreaFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
}

PRInt32 nsLegendFrame::GetAlign()
{
  PRInt32 intValue = NS_STYLE_TEXT_ALIGN_LEFT;
#ifdef IBMBIDI
  const nsStyleVisibility* vis;
  GetStyleData(eStyleStruct_Visibility, (const nsStyleStruct*&)vis);
  if (NS_STYLE_DIRECTION_RTL == vis->mDirection) {
    intValue = NS_STYLE_TEXT_ALIGN_RIGHT;
  }
#endif // IBMBIDI

  nsCOMPtr<nsIHTMLContent> content(do_QueryInterface(mContent));

  if (content) {
    nsHTMLValue value;
    if (NS_CONTENT_ATTR_HAS_VALUE == (content->GetHTMLAttribute(nsHTMLAtoms::align, value))) {
      if (eHTMLUnit_Enumerated == value.GetUnit()) {
        intValue = value.GetIntValue();
      }
    }
  }
  return intValue;
}

#ifdef NS_DEBUG
NS_IMETHODIMP
nsLegendFrame::GetFrameName(nsAString& aResult) const
{
  return MakeFrameName(NS_LITERAL_STRING("Legend"), aResult);
}
#endif