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"
#include "nsCOMPtr.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();
NS_IMETHOD SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_METHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
NS_IMETHOD GetFrameName(nsString& aResult) const {
return MakeFrameName("FieldSet", aResult);
}
protected:
virtual PRIntn GetSkipSides() const;
nsIFrame* mLegendFrame;
nsIFrame* mContentFrame;
nsRect mLegendRect;
nscoord mLegendSpace;
};
nsresult
NS_NewFieldSetFrame(nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsFieldSetFrame* it = new nsFieldSetFrame;
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsFieldSetFrame::nsFieldSetFrame()
: nsHTMLContainerFrame()
{
mContentFrame = nsnull;
mLegendFrame = nsnull;
mLegendSpace = 0;
}
NS_IMETHODIMP
nsFieldSetFrame::SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
// cache our display type
const nsStyleDisplay* styleDisplay;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
PRUint8 flags = (NS_STYLE_DISPLAY_BLOCK != styleDisplay->mDisplay) ? NS_BLOCK_SHRINK_WRAP : 0;
NS_NewAreaFrame(&mContentFrame, flags);
mFrames.SetFrames(mContentFrame);
// Resolve style and initialize the frame
nsIStyleContext* styleContext;
aPresContext.ResolvePseudoStyleContextFor(mContent, nsHTMLAtoms::fieldsetContentPseudo,
mStyleContext, PR_FALSE, &styleContext);
mFrames.FirstChild()->Init(aPresContext, mContent, this, styleContext, nsnull);
mFrames.FirstChild()->SetNextSibling(nsnull);
NS_RELEASE(styleContext);
nsIFrame* newChildList = aChildList;
// Set the geometric and content parent for each of the child frames
// that will go into the area frame's child list.
// The legend frame does not go into the list
nsIFrame* lastNewFrame = nsnull;
for (nsIFrame* frame = aChildList; nsnull != frame;) {
nsIFrame* legendFrame = nsnull;
nsresult result = frame->QueryInterface(kLegendFrameCID, (void**)&legendFrame);
if (NS_SUCCEEDED(result) && legendFrame) {
if (mLegendFrame) { // we already have a legend, destroy it
frame->GetNextSibling(&frame);
if (lastNewFrame) {
lastNewFrame->SetNextSibling(frame);
}
else {
aChildList = frame;
}
legendFrame->Destroy(aPresContext);
}
else {
nsIFrame* nextFrame;
frame->GetNextSibling(&nextFrame);
if (lastNewFrame) {
lastNewFrame->SetNextSibling(nextFrame);
} else {
newChildList = nextFrame;
}
frame->SetParent(this);
mFrames.FirstChild()->SetNextSibling(frame);
mLegendFrame = frame;
mLegendFrame->SetNextSibling(nsnull);
frame = nextFrame;
}
} else {
frame->SetParent(mFrames.FirstChild());
lastNewFrame = frame;
frame->GetNextSibling(&frame);
}
}
// Queue up the frames for the content frame
return mFrames.FirstChild()->SetInitialChildList(aPresContext, nsnull, newChildList);
}
// this is identical to nsHTMLContainerFrame::Paint except for the background and border.
NS_IMETHODIMP
nsFieldSetFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
// 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);
float p2t;
aPresContext.GetScaledPixelsToTwips(&p2t);
nscoord onePixel = NSIntPixelsToTwips(1, p2t);
nsMargin border;
if (!spacing->GetBorder(border)) {
NS_NOTYETIMPLEMENTED("percentage border");
}
nscoord yoff = 0;
// if the border is smaller than the legend. Move the border down
// to be centered on the legend.
if (border.top < mLegendRect.height)
yoff = (mLegendRect.height - border.top)/2;
nsRect rect(0, yoff, mRect.width, mRect.height - yoff);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, *spacing, 0, 0);
if (mLegendFrame) {
// we should probably use PaintBorderEdges to do this but for now just use clipping
// to achieve the same effect.
PRBool clipState;
// draw left side
nsRect clipRect(rect);
clipRect.width = mLegendRect.x - rect.x;
clipRect.height = border.top;
aRenderingContext.PushState();
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect, clipState);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, mStyleContext, skipSides);
aRenderingContext.PopState(clipState);
// draw right side
clipRect = rect;
clipRect.x = mLegendRect.x + mLegendRect.width;
clipRect.width -= (mLegendRect.x + mLegendRect.width);
clipRect.height = border.top;
aRenderingContext.PushState();
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect, clipState);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, mStyleContext, skipSides);
aRenderingContext.PopState(clipState);
// draw bottom
clipRect = rect;
clipRect.y += border.top;
clipRect.height = mRect.height - (yoff + border.top);
aRenderingContext.PushState();
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect, clipState);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, mStyleContext, skipSides);
aRenderingContext.PopState(clipState);
} else {
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, nsRect(0,0,mRect.width, mRect.height), *spacing, mStyleContext, skipSides);
}
}
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && 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;
}
NS_IMETHODIMP
nsFieldSetFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// availSize could have unconstrained values, don't perform any addition on them
nsSize availSize(aReflowState.mComputedWidth, aReflowState.mComputedHeight);
// get our border and padding
const nsMargin &borderPadding = aReflowState.mComputedBorderPadding;
const nsMargin &padding = aReflowState.mComputedPadding;
nsMargin border = borderPadding - padding;
// Figure out how big the legend is if there is one.
nsMargin legendMargin(0,0,0,0);
// if there is a legend frame flow it.
if (mLegendFrame) {
nsHTMLReflowState legendReflowState(aPresContext, aReflowState,
mLegendFrame, nsSize(NS_INTRINSICSIZE,NS_INTRINSICSIZE));
// always give the legend as much size as it needs
legendReflowState.mComputedWidth = NS_INTRINSICSIZE;
legendReflowState.mComputedHeight = NS_INTRINSICSIZE;
ReflowChild(mLegendFrame, aPresContext, aDesiredSize, legendReflowState, aStatus);
// get the legend's margin
nsIStyleContext* legendSC = nsnull;
mLegendFrame->GetStyleContext(&legendSC);
if (legendSC) {
const nsStyleSpacing* legendSpacing =
(const nsStyleSpacing*)legendSC->GetStyleData(eStyleStruct_Spacing);
legendSpacing->GetMargin(legendMargin);
NS_RELEASE(legendSC);
}
// figure out the legend's rectangle
mLegendRect.width = aDesiredSize.width + legendMargin.left + legendMargin.right;
mLegendRect.height = aDesiredSize.height + legendMargin.top + legendMargin.bottom;
mLegendRect.x = borderPadding.left;
mLegendRect.y = 0;
mLegendSpace = 0;
if (mLegendRect.height > border.top) {
// center the border on the legend
mLegendSpace = mLegendRect.height - borderPadding.top;
} else {
mLegendRect.y = (border.top - mLegendRect.height)/2;
}
// if we are contrained then remove the legend from our available height.
if (NS_INTRINSICSIZE != availSize.height) {
if (availSize.height >= mLegendSpace)
availSize.height -= mLegendSpace;
}
// don't get any smaller than the legend
if (NS_INTRINSICSIZE != availSize.width) {
if (availSize.width < mLegendRect.width)
availSize.width = mLegendRect.width;
}
}
// Try to reflow the area frame into the available space.
nsHTMLReflowState contentReflowState(aPresContext, aReflowState,
mContentFrame, availSize);
ReflowChild(mContentFrame, aPresContext, aDesiredSize, contentReflowState, aStatus);
// set the rect. make sure we add the margin back in.
nsRect contentRect(borderPadding.left,borderPadding.top + mLegendSpace,aDesiredSize.width ,aDesiredSize.height);
// Place the content area frame.
mContentFrame->SetRect(contentRect);
if (mLegendFrame)
{
PRInt32 align = ((nsLegendFrame*)mLegendFrame)->GetAlign();
switch(align) {
case NS_STYLE_TEXT_ALIGN_RIGHT:
mLegendRect.x = contentRect.width - mLegendRect.width + borderPadding.left;
break;
case NS_STYLE_TEXT_ALIGN_CENTER:
mLegendRect.x = contentRect.width/2 - mLegendRect.width/2 + borderPadding.left;
}
// place the legend
nsRect actualLegendRect(mLegendRect);
actualLegendRect.Deflate(legendMargin);
mLegendFrame->SetRect(actualLegendRect);
}
// Return our size and our result
if (aReflowState.mComputedHeight == NS_INTRINSICSIZE) {
aDesiredSize.height = mLegendSpace +
borderPadding.top +
aDesiredSize.height +
borderPadding.bottom;
} else {
nscoord min = borderPadding.top + borderPadding.bottom + mLegendRect.height;
aDesiredSize.height = aReflowState.mComputedHeight + borderPadding.top + borderPadding.bottom;
if (aDesiredSize.height < min)
aDesiredSize.height = min;
}
if (aReflowState.mComputedWidth == NS_INTRINSICSIZE) {
aDesiredSize.width = borderPadding.left +
aDesiredSize.width +
borderPadding.right;
} else {
nscoord min = borderPadding.left + borderPadding.right + mLegendRect.width;
aDesiredSize.width = aReflowState.mComputedWidth + borderPadding.left + borderPadding.right;
if (aDesiredSize.width < min)
aDesiredSize.width = min;
}
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
if (nsnull != aDesiredSize.maxElementSize) {
// if the legend it wider use it
if (aDesiredSize.maxElementSize->width < mLegendRect.width)
aDesiredSize.maxElementSize->width = mLegendRect.width;
// add in padding.
aDesiredSize.maxElementSize->width += borderPadding.left + borderPadding.right;
// height is border + legend
aDesiredSize.maxElementSize->height += borderPadding.top + borderPadding.bottom + mLegendRect.height;
}
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
PRIntn
nsFieldSetFrame::GetSkipSides() const
{
return 0;
}