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gecko-dev/layout/forms/nsFieldSetFrame.cpp

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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 "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 "nsHTMLContainerFrame.h"
#include "nsLegendFrame.h"
#include "nsIDOMNode.h"
#include "nsIDOMHTMLFieldSetElement.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(kIDOMHTMLFieldSetElementIID, NS_IDOMHTMLFIELDSETELEMENT_IID);
static NS_DEFINE_IID(kIDOMHTMLLegendElementIID, NS_IDOMHTMLLEGENDELEMENT_IID);
class nsLegendFrame;
class nsFieldSetFrame : public nsHTMLContainerFrame {
public:
nsFieldSetFrame(nsIContent* aContent, nsIFrame* aParentFrame);
NS_IMETHOD Init(nsIPresContext& aPresContext, nsIFrame* aChildList);
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_METHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
protected:
virtual ~nsFieldSetFrame();
void SetMaxElementSize(nsSize& maxSize, nsSize* aSize);
virtual PRIntn GetSkipSides() const;
//virtual void GetDesiredSize(nsIPresContext* aPresContext,
// const nsReflowState& aReflowState,
// nsReflowMetrics& aDesiredLayoutSize,
// nsSize& aDesiredWidgetSize);
nsIFrame* mLegendFrame;
nsIFrame* mContentFrame;
nsRect mTopBorderGap;
PRInt32 mTopBorderOffset;
PRBool mInline;
};
nsresult
NS_NewFieldSetFrame(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame*& aResult)
{
aResult = new nsFieldSetFrame(aContent, aParent);
if (nsnull == aResult) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsFieldSetFrame::nsFieldSetFrame(nsIContent* aContent,
nsIFrame* aParentFrame)
: nsHTMLContainerFrame(aContent, aParentFrame)
{
mContentFrame = nsnull;
mLegendFrame = nsnull;
mTopBorderGap = nsRect(0,0,0,0);
mTopBorderOffset = 0;
mInline = PR_TRUE;
}
nsFieldSetFrame::~nsFieldSetFrame()
{
}
NS_IMETHODIMP
nsFieldSetFrame::Init(nsIPresContext& aPresContext, 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_BODY_SHRINK_WRAP : 0;
NS_NewBodyFrame(mContent, this, mFirstChild, flags);
mContentFrame = mFirstChild;
// Resolve style and set the style context
nsIStyleContext* styleContext = aPresContext.ResolveStyleContextFor(mContent, this);
mFirstChild->SetStyleContext(&aPresContext, styleContext);
NS_RELEASE(styleContext);
nsIFrame* newChildList = aChildList;
mFirstChild->SetNextSibling(nsnull);
// Set the geometric and content parent for each of the child frames.
// The legend is handled differently and removed from aChildList
nsIFrame* lastFrame = nsnull;
for (nsIFrame* frame = aChildList; nsnull != frame; frame->GetNextSibling(frame)) {
nsIFrame* legendFrame = nsnull;
nsresult result = frame->QueryInterface(kLegendFrameCID, (void**)&legendFrame);
if ((NS_OK == result) && legendFrame) {
nsIFrame* nextFrame;
frame->GetNextSibling(nextFrame);
if (lastFrame) {
lastFrame->SetNextSibling(nextFrame);
} else {
newChildList = nextFrame;
}
frame->SetGeometricParent(this);
frame->SetContentParent(this);
mFirstChild->SetNextSibling(frame);
mLegendFrame = frame;
mLegendFrame->SetNextSibling(nsnull);
} else {
frame->SetGeometricParent(mFirstChild);
frame->SetContentParent(mFirstChild);
}
lastFrame = frame;
}
// Queue up the frames for the content frame
return mFirstChild->Init(aPresContext, newChildList);
}
// this is identical to nsHTMLContainerFrame::Paint except for the background and border.
NS_IMETHODIMP
nsFieldSetFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
// Paint our background and border
const nsStyleDisplay* disp =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (disp->mVisible && mRect.width && mRect.height) {
PRIntn skipSides = GetSkipSides();
const nsStyleColor* color =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* spacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsRect backgroundRect(0, 0, mRect.width, mRect.height);
// XXX our parent doesn't account for top and bottom margins yet, if we are inline
if (mInline) {
nsMargin margin;
spacing->CalcMarginFor(this, margin);
nsRect rect(0, mTopBorderOffset, mRect.width, mRect.height - margin.top -
margin.bottom - mTopBorderOffset);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, skipSides, &mTopBorderGap);
} else {
nsRect rect(0, mTopBorderOffset, mRect.width, mRect.height - mTopBorderOffset);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, skipSides, &mTopBorderGap);
}
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect);
if (nsIFrame::GetShowFrameBorders()) {
nsIView* view;
GetView(view);
if (nsnull != view) {
aRenderingContext.SetColor(NS_RGB(0,0,255));
}
else {
aRenderingContext.SetColor(NS_RGB(255,0,0));
}
aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
}
return NS_OK;
}
void
nsFieldSetFrame::SetMaxElementSize(nsSize& maxSize, nsSize* aSize)
{
if (aSize) {
maxSize.width = (maxSize.width >= aSize->width) ? maxSize.width : aSize->width;
maxSize.height = (maxSize.height >= aSize->width) ? maxSize.height : aSize->height;
}
}
// XXX currently only supports legend align=left,center,right
#define MIN_TOP_BORDER 10
NS_IMETHODIMP
nsFieldSetFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsSize availSize(aReflowState.maxSize);
float p2t = aPresContext.GetPixelsToTwips();
const PRInt32 minTopBorder = NSIntPixelsToTwips(MIN_TOP_BORDER, p2t);
const nsStyleSpacing* spacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsMargin margin;
spacing->CalcMarginFor(this, margin);
nsMargin border;
nsMargin padding;
spacing->CalcBorderFor(this, border);
spacing->CalcPaddingFor(this, padding);
nsMargin borderPadding = border + padding;
nsMargin legendMargin;
if (mLegendFrame) {
nsIStyleContext* legendSC = nsnull;
mLegendFrame->GetStyleContext(&aPresContext, legendSC);
if (legendSC) {
const nsStyleSpacing* legendSpacing =
(const nsStyleSpacing*)legendSC->GetStyleData(eStyleStruct_Spacing);
legendSpacing->CalcMarginFor(mLegendFrame, legendMargin);
NS_RELEASE(legendSC);
}
}
// reduce available space by border, padding, etc. if we're in a constrained situation
nscoord horTaken = borderPadding.left + borderPadding.right + (2 * minTopBorder) +
legendMargin.left + legendMargin.right;
nscoord verTaken = padding.top + borderPadding.bottom + legendMargin.top + legendMargin.bottom;
if (NS_UNCONSTRAINEDSIZE != availSize.width)
availSize.width -= horTaken;
if (NS_UNCONSTRAINEDSIZE != availSize.height) {
// XXX this assumes that the legend is taller than the top border width
availSize.height -= verTaken;
if (mInline) { // XXX parents don't account for inline top, bottom margins yet
availSize.height -= margin.top;
}
}
if (availSize.height < 0)
availSize.height = 1;
nsSize maxElementSize(0,0);
nsIHTMLReflow* htmlReflow = nsnull;
// Try to reflow the legend into the available space. It might not fit
nsSize legendSize(0,0);
if (mLegendFrame) {
nsHTMLReflowState legendReflowState(mLegendFrame, aReflowState, availSize);
ReflowChild(mLegendFrame, aPresContext, aDesiredSize, legendReflowState, aStatus);
legendSize.width = aDesiredSize.width;
legendSize.height = aDesiredSize.height;
// The legend didn't fit
if ((NS_UNCONSTRAINEDSIZE != availSize.width) &&
(availSize.width < aDesiredSize.width + legendMargin.left + legendMargin.right)) {
availSize.width = aDesiredSize.width + horTaken;
}
if ((NS_UNCONSTRAINEDSIZE != availSize.height) && (availSize.height < aDesiredSize.height)) {
availSize.height = 0;
} else {
availSize.height -= aDesiredSize.height;
}
SetMaxElementSize(maxElementSize, aDesiredSize.maxElementSize);
}
PRBool needAnotherLegendReflow = PR_FALSE;
// Try to reflow the content frame into the available space. It might not fit
nsSize contentSize(0,0);
nsHTMLReflowState contentReflowState(mContentFrame, aReflowState, availSize);
nscoord contentTopOffset = (legendSize.height > border.top)
? legendSize.height + padding.top
: border.top + padding.top;
ReflowChild(mContentFrame, aPresContext, aDesiredSize, contentReflowState, aStatus);
contentSize.width = aDesiredSize.width;
contentSize.height = aDesiredSize.height;
// The content didn't fit
if ((NS_UNCONSTRAINEDSIZE != availSize.width) && (availSize.width < aDesiredSize.width)) {
needAnotherLegendReflow = PR_TRUE;
availSize.width = contentSize.width + borderPadding.left + borderPadding.right;
}
if ((NS_UNCONSTRAINEDSIZE != availSize.height) && (availSize.height < aDesiredSize.height)) {
needAnotherLegendReflow = PR_TRUE;
}
SetMaxElementSize(maxElementSize, aDesiredSize.maxElementSize);
// need to reflow the legend a 2nd time
if (needAnotherLegendReflow && mLegendFrame) {
nsHTMLReflowState legendReflowState(mLegendFrame, aReflowState, availSize);
ReflowChild(mLegendFrame, aPresContext, aDesiredSize, legendReflowState, aStatus);
legendSize.width = aDesiredSize.width;
legendSize.height = aDesiredSize.height;
}
nscoord legendWidth = legendSize.width + border.left + border.right + (2 * minTopBorder);
nscoord contentWidth = contentSize.width + borderPadding.left + borderPadding.right;
aDesiredSize.width = (legendWidth > contentWidth) ? legendWidth : contentWidth;
// Place the legend
nsRect legendRect(0, 0, 0, 0);
contentTopOffset = border.top + padding.top;
if (mInline) // XXX parents don't handle inline top, bottom margins
contentTopOffset += margin.top;
if (mLegendFrame) {
nscoord legendTopOffset;
if (legendSize.height > border.top) {
legendTopOffset = (mInline) ? margin.top : 0; // XXX parents don't .......
} else {
legendTopOffset = (border.top - legendSize.height) / 2;
if (mInline) // XXX parents don't ......
legendTopOffset += margin.top;
}
contentTopOffset = legendTopOffset + legendSize.height + padding.top;
nscoord legendLeftOffset = 0;
PRInt32 align = ((nsLegendFrame*)mLegendFrame)->GetAlign();
switch(align) {
case NS_STYLE_TEXT_ALIGN_LEFT:
legendLeftOffset = border.left + minTopBorder;
break;
case NS_STYLE_TEXT_ALIGN_RIGHT:
legendLeftOffset = aDesiredSize.width - border.right - minTopBorder - legendSize.width;
break;
// XXX The spec specifies center and top but we are following IE4's lead and making left
// be the upper left and right be the upper right. IE4 introduced center which is not part
// of the spec.
case NS_STYLE_TEXT_ALIGN_CENTER:
case NS_STYLE_VERTICAL_ALIGN_BOTTOM:
case NS_STYLE_VERTICAL_ALIGN_TOP:
default:
legendLeftOffset = (aDesiredSize.width - legendSize.width) / 2;
break;
}
// reduce by legend margins
legendRect = nsRect(legendLeftOffset + legendMargin.left, legendTopOffset + legendMargin.top,
legendSize.width, legendSize.height);
mLegendFrame->SetRect(legendRect);
// cache values so the border will be painted around the vertical center of the legend
mTopBorderOffset = legendSize.height / 2;
if (mInline) // XXX parents don't yet .....
mTopBorderOffset += margin.top;
mTopBorderGap = nsRect(legendLeftOffset, legendTopOffset, legendSize.width + legendMargin.left +
legendMargin.right, legendSize.height + legendMargin.top +
legendMargin.bottom);
}
// Place the content frame
nsRect contentRect(borderPadding.left, contentTopOffset, contentSize.width, contentSize.height);
mContentFrame->SetRect(contentRect);
// Return our size and our result
aDesiredSize.height = contentTopOffset + contentSize.height + borderPadding.bottom;
if (mInline) // XXX parents don't yet ......
aDesiredSize.height += margin.bottom;
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = maxElementSize.width + borderPadding.left + borderPadding.right;
aDesiredSize.maxElementSize->height = maxElementSize.height + borderPadding.top + borderPadding.bottom;
}
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
PRIntn
nsFieldSetFrame::GetSkipSides() const
{
return 0;
}
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