gecko-dev/layout/forms/nsLegendFrame.cpp

201 lines
6.2 KiB
C++

/* -*- 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 "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
// YY need to pass isMultiple before create called
//#include "nsFormControlFrame.h"
#include "nsLegendFrame.h"
#include "nsIDOMNode.h"
#include "nsIDOMHTMLLegendElement.h"
#include "nsCSSRendering.h"
//#include "nsIDOMHTMLCollection.h"
#include "nsIContent.h"
//#include "prtypes.h"
#include "nsIFrame.h"
#include "nsISupports.h"
#include "nsIAtom.h"
#include "nsIPresContext.h"
#include "nsIHTMLContent.h"
#include "nsHTMLIIDs.h"
#include "nsHTMLParts.h"
//#include "nsIRadioButton.h"
//#include "nsWidgetsCID.h"
//#include "nsSize.h"
#include "nsHTMLAtoms.h"
//#include "nsIView.h"
//#include "nsIListWidget.h"
//#include "nsIComboBox.h"
//#include "nsIListBox.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsStyleUtil.h"
#include "nsFont.h"
static NS_DEFINE_IID(kLegendFrameCID, NS_LEGEND_FRAME_CID);
static NS_DEFINE_IID(kIDOMHTMLLegendElementIID, NS_IDOMHTMLLEGENDELEMENT_IID);
nsresult
NS_NewLegendFrame(nsIFrame*& aResult)
{
aResult = new nsLegendFrame;
if (nsnull == aResult) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsLegendFrame::nsLegendFrame()
: nsHTMLContainerFrame()
{
mInline = PR_FALSE;
}
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::SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
// cache our display type
const nsStyleDisplay* styleDisplay;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
mInline = (NS_STYLE_DISPLAY_BLOCK != styleDisplay->mDisplay);
PRUint8 flags = (mInline) ? NS_BLOCK_SHRINK_WRAP : 0;
nsIFrame* areaFrame;
NS_NewAreaFrame(areaFrame, flags);
mFrames.SetFrames(areaFrame);
// Resolve style and initialize the frame
nsIStyleContext* styleContext =
aPresContext.ResolvePseudoStyleContextFor(mContent, nsHTMLAtoms::legendContentPseudo, mStyleContext);
mFrames.FirstChild()->Init(aPresContext, mContent, this, styleContext);
NS_RELEASE(styleContext);
// Set the parent for each of the child frames
for (nsIFrame* frame = aChildList; nsnull != frame; frame->GetNextSibling(frame)) {
frame->SetParent(mFrames.FirstChild());
}
// Queue up the frames for the inline frame
return mFrames.FirstChild()->SetInitialChildList(aPresContext, nsnull, aChildList);
}
NS_IMETHODIMP
nsLegendFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
return nsHTMLContainerFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
}
NS_IMETHODIMP
nsLegendFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsSize availSize(aReflowState.availableWidth, aReflowState.availableHeight);
// reflow the child
nsIFrame* firstKid = mFrames.FirstChild();
nsHTMLReflowState reflowState(aPresContext, firstKid, aReflowState,
availSize);
ReflowChild(firstKid, aPresContext, aDesiredSize, reflowState, aStatus);
// get border and padding
const nsStyleSpacing* spacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsMargin borderPadding;
spacing->CalcBorderPaddingFor(this, borderPadding);
// Place the child
nsRect rect = nsRect(borderPadding.left, borderPadding.top, aDesiredSize.width, aDesiredSize.height);
firstKid->SetRect(rect);
// add in our border and padding to the size of the child
aDesiredSize.width += borderPadding.left + borderPadding.right;
if (aReflowState.HaveFixedContentWidth() && (aReflowState.computedWidth > aDesiredSize.width)) {
aDesiredSize.width = aReflowState.computedWidth;
}
aDesiredSize.height += borderPadding.top + borderPadding.bottom;
if (aReflowState.HaveFixedContentHeight() && (aReflowState.computedHeight > aDesiredSize.height)) {
aDesiredSize.height = aReflowState.computedHeight;
}
// adjust our max element size, if necessary
if (aDesiredSize.maxElementSize) {
aDesiredSize.AddBorderPaddingToMaxElementSize(borderPadding);
}
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
PRInt32 nsLegendFrame::GetAlign()
{
PRInt32 intValue = NS_STYLE_TEXT_ALIGN_CENTER;
nsIHTMLContent* content = nsnull;
mContent->QueryInterface(kIHTMLContentIID, (void**) &content);
if (nsnull != content) {
nsHTMLValue value;
if (NS_CONTENT_ATTR_HAS_VALUE == (content->GetHTMLAttribute(nsHTMLAtoms::align, value))) {
if (eHTMLUnit_Enumerated == value.GetUnit()) {
intValue = value.GetIntValue();
}
}
NS_RELEASE(content);
}
return intValue;
}
PRIntn
nsLegendFrame::GetSkipSides() const
{
return 0;
}
PRBool
nsLegendFrame::IsInline()
{
return mInline;
}
NS_IMETHODIMP
nsLegendFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Legend", aResult);
}