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751
layout/html/base/src/nsBodyFrame.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.
*/
#include "nsBodyFrame.h"
#include "nsIContent.h"
#include "nsIHTMLContent.h"
#include "nsIReflowCommand.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIViewManager.h"
#include "nsIDeviceContext.h"
#include "nsSpaceManager.h"
#include "nsHTMLAtoms.h"
#include "nsIView.h"
#include "nsViewsCID.h"
#include "nsHTMLIIDs.h"
#include "nsIWebShell.h"
#include "nsHTMLValue.h"
#include "nsHTMLParts.h"
#include "nsLayoutAtoms.h"
static NS_DEFINE_IID(kIWebShellIID, NS_IWEB_SHELL_IID);
nsresult
NS_NewBodyFrame(nsIFrame*& aResult, PRUint32 aFlags)
{
nsBodyFrame* it = new nsBodyFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
it->SetFlags(aFlags);
aResult = it;
return NS_OK;
}
nsBodyFrame::nsBodyFrame()
{
mSpaceManager = new nsSpaceManager(this);
NS_ADDREF(mSpaceManager);
}
nsBodyFrame::~nsBodyFrame()
{
NS_RELEASE(mSpaceManager);
}
/////////////////////////////////////////////////////////////////////////////
// nsIFrame
NS_IMETHODIMP
nsBodyFrame::DeleteFrame(nsIPresContext& aPresContext)
{
DeleteFrameList(aPresContext, &mAbsoluteFrames);
return nsBlockFrame::DeleteFrame(aPresContext);
}
NS_IMETHODIMP
nsBodyFrame::GetAdditionalChildListName(PRInt32 aIndex,
nsIAtom*& aListName) const
{
if (aIndex <= NS_BLOCK_FRAME_LAST_LIST_INDEX) {
return nsBlockFrame::GetAdditionalChildListName(aIndex, aListName);
}
nsIAtom* atom = nsnull;
if (NS_BODY_FRAME_ABSOLUTE_LIST_INDEX == aIndex) {
atom = nsLayoutAtoms::absoluteList;
NS_ADDREF(atom);
}
aListName = atom;
return NS_OK;
}
NS_IMETHODIMP
nsBodyFrame::FirstChild(nsIAtom* aListName, nsIFrame*& aFirstChild) const
{
if (aListName == nsLayoutAtoms::absoluteList) {
aFirstChild = mAbsoluteFrames;
return NS_OK;
}
return nsBlockFrame::FirstChild(aListName, aFirstChild);
}
#ifdef NS_DEBUG
void
nsBodyFrame::BandData::ComputeAvailSpaceRect()
{
nsBandTrapezoid* trapezoid = data;
if (count > 1) {
// If there's more than one trapezoid that means there are floaters
PRInt32 i;
// Stop when we get to space occupied by a right floater, or when we've
// looked at every trapezoid and none are right floaters
for (i = 0; i < count; i++) {
nsBandTrapezoid* trapezoid = &data[i];
if (trapezoid->state != nsBandTrapezoid::Available) {
const nsStyleDisplay* display;
if (nsBandTrapezoid::OccupiedMultiple == trapezoid->state) {
PRInt32 j, numFrames = trapezoid->frames->Count();
NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
for (j = 0; j < numFrames; j++) {
nsIFrame* f = (nsIFrame*)trapezoid->frames->ElementAt(j);
f->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
goto foundRightFloater;
}
}
} else {
trapezoid->frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
break;
}
}
}
}
foundRightFloater:
if (i > 0) {
trapezoid = &data[i - 1];
}
}
if (nsBandTrapezoid::Available == trapezoid->state) {
// The trapezoid is available
trapezoid->GetRect(availSpace);
} else {
const nsStyleDisplay* display;
// The trapezoid is occupied. That means there's no available space
trapezoid->GetRect(availSpace);
// XXX Better handle the case of multiple frames
if (nsBandTrapezoid::Occupied == trapezoid->state) {
trapezoid->frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
availSpace.x = availSpace.XMost();
}
}
availSpace.width = 0;
}
}
#endif
#ifdef NS_DEBUG
NS_IMETHODIMP
nsBodyFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
// Note: all absolutely positioned elements have views so we don't
// need to worry about painting them
nsresult rv = nsBlockFrame::Paint(aPresContext, aRenderingContext,
aDirtyRect, aWhichLayer);
if ((eFramePaintLayer_Overlay == aWhichLayer) &&
nsIFrame::GetShowFrameBorders()) {
// Render the bands in the spacemanager
BandData band;
nsISpaceManager* sm = mSpaceManager;
nscoord y = 0;
while (y < mRect.height) {
sm->GetBandData(y, nsSize(mRect.width, mRect.height - y), band);
band.ComputeAvailSpaceRect();
// Render a box and a diagonal line through the band
aRenderingContext.SetColor(NS_RGB(0,255,0));
aRenderingContext.DrawRect(0, band.availSpace.y,
mRect.width, band.availSpace.height);
aRenderingContext.DrawLine(0, band.availSpace.y,
mRect.width, band.availSpace.YMost());
// Render boxes and opposite diagonal lines around the
// unavailable parts of the band.
PRInt32 i;
for (i = 0; i < band.count; i++) {
nsBandTrapezoid* trapezoid = &band.data[i];
if (nsBandTrapezoid::Available != trapezoid->state) {
nsRect r;
trapezoid->GetRect(r);
if (nsBandTrapezoid::OccupiedMultiple == trapezoid->state) {
aRenderingContext.SetColor(NS_RGB(0,255,128));
}
else {
aRenderingContext.SetColor(NS_RGB(128,255,0));
}
aRenderingContext.DrawRect(r);
aRenderingContext.DrawLine(r.x, r.YMost(), r.XMost(), r.y);
}
}
y = band.availSpace.YMost();
}
}
return rv;
}
#endif
NS_IMETHODIMP
nsBodyFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsBodyFrame::Reflow: maxSize=%d,%d reason=%d",
aReflowState.availableWidth,
aReflowState.availableHeight,
aReflowState.reason));
// Make a copy of the reflow state so we can set the space manager
nsHTMLReflowState reflowState(aReflowState);
reflowState.spaceManager = mSpaceManager;
// Clear the spacemanager's regions.
mSpaceManager->ClearRegions();
// XXX We need to peek at incremental reflow commands and see if the next
// frame is one of the absolutely positioned frames...
nsresult rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, reflowState, aStatus);
// Reflow any absolutely positioned frames that need reflowing
// XXX We shouldn't really be doing this for all incremental reflow commands
ReflowAbsoluteItems(aPresContext, reflowState);
// Compute our desired size. Take into account any floaters when computing the
// height
nscoord floaterYMost = mSpaceManager->YMost();
if (floaterYMost > 0) {
// What we need to check for is if the bottom most floater extends below
// the content area of the desired size
nsMargin borderPadding;
nscoord contentYMost;
nsHTMLReflowState::ComputeBorderPaddingFor(this, aReflowState.parentReflowState,
borderPadding);
contentYMost = aDesiredSize.height - borderPadding.bottom;
if (floaterYMost > contentYMost) {
aDesiredSize.height += floaterYMost - contentYMost;
}
}
// Also take into account absolutely positioned elements depending on
// the overflow policy
const nsStyleDisplay* display = (const nsStyleDisplay*)
mStyleContext->GetStyleData(eStyleStruct_Display);
if (NS_STYLE_OVERFLOW_HIDDEN != display->mOverflow) {
for (nsIFrame* f = mAbsoluteFrames; nsnull != f; f->GetNextSibling(f)) {
nsRect rect;
f->GetRect(rect);
nscoord xmost = rect.XMost();
nscoord ymost = rect.YMost();
if (xmost > aDesiredSize.width) {
aDesiredSize.width = xmost;
}
if (ymost > aDesiredSize.height) {
aDesiredSize.height = ymost;
}
}
}
// XXX This code is really temporary; the lower level frame
// classes need to contribute to the area that needs damage
// repair. This class should only worry about damage repairing
// it's border+padding area.
nsRect damageArea(0, 0, 0, 0);
// Decide how much to repaint based on the reflow type.
// Note: we don't have to handle the initial reflow case and the
// resize reflow case, because they're handled by the scroll frame
if (eReflowReason_Incremental == aReflowState.reason) {
nsIReflowCommand::ReflowType reflowType;
aReflowState.reflowCommand->GetType(reflowType);
// For append reflow commands that target the flowed frames just
// repaint the newly added part of the frame.
if (nsIReflowCommand::FrameAppended == reflowType) {
//this blows. we're repainting everything, but we have no choice
//since we don't know how we got here. see the XXX above for a
//real fix.
#if 1
damageArea.y = 0;
damageArea.height = aDesiredSize.height;
damageArea.width = aDesiredSize.width;
#else
// It's an append reflow command
damageArea.y = mRect.YMost();
damageArea.width = aDesiredSize.width;
damageArea.height = aDesiredSize.height - mRect.height;
if ((damageArea.height < 0) ||
(aDesiredSize.height == mRect.height)) {
// Since we don't know what changed, assume it all changed.
damageArea.y = 0;
damageArea.height = aDesiredSize.height;
}
#endif
} else {
// Ideally the frame that is the target of the reflow command
// (or its parent frame) would generate a damage rect, but
// since none of the frame classes know how to do this then
// for the time being just repaint the entire frame
damageArea.width = aDesiredSize.width;
// If the new height is smaller than the old height then make
// sure we erase whatever used to be displayed
damageArea.height = PR_MAX(aDesiredSize.height, mRect.height);
}
}
// If this is really the body, force a repaint of the damage area
if ((NS_BODY_THE_BODY & mFlags) && !damageArea.IsEmpty()) {
Invalidate(damageArea);
}
return rv;
}
NS_METHOD
nsBodyFrame::CreateContinuingFrame(nsIPresContext& aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame)
{
nsBodyFrame* cf = new nsBodyFrame;
if (nsnull == cf) {
return NS_ERROR_OUT_OF_MEMORY;
}
cf->Init(aPresContext, mContent, aParent, mContentParent, aStyleContext);
cf->SetFlags(mFlags);
cf->AppendToFlow(this);
aContinuingFrame = cf;
return NS_OK;
}
static void
AddToPadding(nsIPresContext* aPresContext,
nsStyleUnit aStyleUnit,
nscoord aValue,
PRBool aVertical,
nsStyleCoord& aStyleCoord)
{
if (eStyleUnit_Coord == aStyleUnit) {
nscoord coord;
coord = aStyleCoord.GetCoordValue();
coord += aValue;
aStyleCoord.SetCoordValue(coord);
}
else if (eStyleUnit_Percent == aStyleUnit) {
nsRect visibleArea;
aPresContext->GetVisibleArea(visibleArea);
float increment = (aVertical)
? ((float)aValue) / ((float)visibleArea.height)
: ((float)aValue) / ((float)visibleArea.width);
float percent = aStyleCoord.GetPercentValue();
percent += increment;
aStyleCoord.SetPercentValue(percent);
}
}
// XXX ick. pfuii. gotta go!
NS_METHOD
nsBodyFrame::DidSetStyleContext(nsIPresContext* aPresContext)
{
if ((0 == (NS_BODY_THE_BODY & mFlags)) || (nsnull == mContent)) {
return NS_OK;
}
// marginwidth/marginheight set in the body cancels
// marginwidth/marginheight set in the web shell. However, if
// marginwidth is set in the web shell but marginheight is not set
// it is as if marginheight were set to 0. The same logic applies
// when marginheight is set and marginwidth is not set.
PRInt32 marginWidth = -1, marginHeight = -1;
nsISupports* container;
aPresContext->GetContainer(&container);
if (nsnull != container) {
nsIWebShell* webShell = nsnull;
container->QueryInterface(kIWebShellIID, (void**) &webShell);
if (nsnull != webShell) {
webShell->GetMarginWidth(marginWidth); // -1 indicates not set
webShell->GetMarginHeight(marginHeight); // -1 indicates not set
if ((marginWidth >= 0) && (marginHeight < 0)) { // nav quirk
marginHeight = 0;
}
if ((marginHeight >= 0) && (marginWidth < 0)) { // nav quirk
marginWidth = 0;
}
NS_RELEASE(webShell);
}
NS_RELEASE(container);
}
nsHTMLValue value;
float p2t;
aPresContext->GetScaledPixelsToTwips(p2t);
nsIHTMLContent* hc;
if (NS_OK == mContent->QueryInterface(kIHTMLContentIID, (void**) &hc)) {
hc->GetHTMLAttribute(nsHTMLAtoms::marginwidth, value);
if (eHTMLUnit_Pixel == value.GetUnit()) { // marginwidth is set in body
marginWidth = NSIntPixelsToTwips(value.GetPixelValue(), p2t);
if (marginWidth < 0) {
marginWidth = 0;
}
}
hc->GetHTMLAttribute(nsHTMLAtoms::marginheight, value);
if (eHTMLUnit_Pixel == value.GetUnit()) { // marginheight is set in body
marginHeight = NSIntPixelsToTwips(value.GetPixelValue(), p2t);
if (marginHeight < 0) {
marginHeight = 0;
}
}
NS_RELEASE(hc);
}
nsStyleSpacing* spacing = nsnull;
nsStyleCoord styleCoord;
if (marginWidth > 0) { // add marginwidth to padding
spacing = (nsStyleSpacing*)mStyleContext->GetMutableStyleData(eStyleStruct_Spacing);
AddToPadding(aPresContext, spacing->mPadding.GetLeftUnit(),
marginWidth, PR_FALSE, spacing->mPadding.GetLeft(styleCoord));
spacing->mPadding.SetLeft(styleCoord);
AddToPadding(aPresContext, spacing->mPadding.GetRightUnit(),
marginWidth, PR_FALSE, spacing->mPadding.GetRight(styleCoord));
spacing->mPadding.SetRight(styleCoord);
}
if (marginHeight > 0) { // add marginheight to padding
if (nsnull == spacing) {
spacing = (nsStyleSpacing*)mStyleContext->GetMutableStyleData(eStyleStruct_Spacing);
}
AddToPadding(aPresContext, spacing->mPadding.GetTopUnit(),
marginHeight, PR_TRUE, spacing->mPadding.GetTop(styleCoord));
spacing->mPadding.SetTop(styleCoord);
AddToPadding(aPresContext, spacing->mPadding.GetBottomUnit(),
marginHeight, PR_TRUE, spacing->mPadding.GetBottom(styleCoord));
spacing->mPadding.SetBottom(styleCoord);
}
if (nsnull != spacing) {
mStyleContext->RecalcAutomaticData(aPresContext);
}
return NS_OK;
}
/////////////////////////////////////////////////////////////////////////////
// Helper functions
// Add the frame to the end of the child list
void nsBodyFrame::AddAbsoluteFrame(nsIFrame* aFrame)
{
if (nsnull == mAbsoluteFrames) {
mAbsoluteFrames = aFrame;
} else {
nsIFrame* lastChild = LastFrame(mAbsoluteFrames);
lastChild->SetNextSibling(aFrame);
aFrame->SetNextSibling(nsnull);
// XXX Eliminate mChildCount...
}
}
PRBool
nsBodyFrame::IsAbsoluteFrame(nsIFrame* aFrame)
{
// Check whether the frame is in our list of absolutely positioned frames
for (nsIFrame* f = mAbsoluteFrames; nsnull != f; f->GetNextSibling(f)) {
if (f == aFrame) {
return PR_TRUE;
}
}
return PR_FALSE;
}
// Called at the end of the Reflow() member function so we can process
// any abolutely positioned items that need to be reflowed
void
nsBodyFrame::ReflowAbsoluteItems(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState)
{
#if 0
for (PRInt32 i = 0; i < mAbsoluteItems.Count(); i++) {
// Get the anchor frame and its absolutely positioned frame
nsAbsoluteFrame* anchorFrame = (nsAbsoluteFrame*)mAbsoluteItems[i];
nsIFrame* absoluteFrame = anchorFrame->GetAbsoluteFrame();
PRBool placeFrame = PR_FALSE;
PRBool reflowFrame = PR_FALSE;
nsReflowReason reflowReason = eReflowReason_Resize;
// Get its style information
const nsStyleDisplay* display;
const nsStylePosition* position;
absoluteFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
absoluteFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
// See whether the frame is a newly added frame
if (!IsAbsoluteFrame(absoluteFrame)) {
// The absolutely position item hasn't yet been added to our child list
absoluteFrame->SetGeometricParent(this);
// Add the absolutely positioned frame to the end of the child list
AddAbsoluteFrame(absoluteFrame);
// See whether this is the frame's initial reflow
nsFrameState frameState;
absoluteFrame->GetFrameState(frameState);
if (frameState & NS_FRAME_FIRST_REFLOW) {
reflowReason = eReflowReason_Initial;
}
// We need to place and reflow the absolutely positioned frame
placeFrame = reflowFrame = PR_TRUE;
} else {
// We need to place the frame if the left-offset or the top-offset are
// auto or a percentage
if ((eStyleUnit_Coord != position->mLeftOffset.GetUnit()) ||
(eStyleUnit_Coord != position->mTopOffset.GetUnit())) {
placeFrame = PR_TRUE;
}
// We need to reflow the frame if its width or its height is auto or
// a percentage
if ((eStyleUnit_Coord != position->mWidth.GetUnit()) ||
(eStyleUnit_Coord != position->mHeight.GetUnit())) {
reflowFrame = PR_TRUE;
}
}
if (placeFrame || reflowFrame) {
// Get the rect for the absolutely positioned element
nsRect rect;
ComputeAbsoluteFrameBounds(anchorFrame, aReflowState, position, rect);
nsIHTMLReflow* htmlReflow;
if (NS_OK == absoluteFrame->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow)) {
htmlReflow->WillReflow(aPresContext);
absoluteFrame->MoveTo(rect.x, rect.y);
if (reflowFrame) {
// Resize reflow the absolutely positioned element
nsSize availSize(rect.width, rect.height);
if (NS_STYLE_OVERFLOW_VISIBLE == display->mOverflow) {
// Don't constrain the height since the container should be enlarged
// to contain overflowing frames
availSize.height = NS_UNCONSTRAINEDSIZE;
}
nsHTMLReflowMetrics desiredSize(nsnull);
nsHTMLReflowState reflowState(aPresContext, absoluteFrame,
aReflowState, availSize,
reflowReason);
nsReflowStatus status;
htmlReflow->Reflow(aPresContext, desiredSize, reflowState, status);
// Figure out what size to actually use. If we let the child choose its
// size, then use what the child requested. Otherwise, use the value
// specified in the style information
if ((eStyleUnit_Auto == position->mWidth.GetUnit()) ||
((desiredSize.width > availSize.width) &&
(NS_STYLE_OVERFLOW_VISIBLE == display->mOverflow))) {
rect.width = desiredSize.width;
}
if ((eStyleUnit_Auto == position->mHeight.GetUnit()) ||
(NS_UNCONSTRAINEDSIZE == rect.height) ||
((desiredSize.height > rect.height) &&
(NS_STYLE_OVERFLOW_VISIBLE == display->mOverflow))) {
rect.height = desiredSize.height;
}
absoluteFrame->SetRect(rect);
}
}
}
}
#endif
}
// Translate aPoint from aFrameFrom's coordinate space to our coordinate space
void nsBodyFrame::TranslatePoint(nsIFrame* aFrameFrom, nsPoint& aPoint) const
{
nsIFrame* parent;
aFrameFrom->GetGeometricParent(parent);
while ((nsnull != parent) && (parent != (nsIFrame*)this)) {
nsPoint origin;
parent->GetOrigin(origin);
aPoint += origin;
parent->GetGeometricParent(parent);
}
}
void nsBodyFrame::ComputeAbsoluteFrameBounds(nsIFrame* aAnchorFrame,
const nsHTMLReflowState& aReflowState,
const nsStylePosition* aPosition,
nsRect& aRect) const
{
// Compute the offset and size of the view based on the position properties,
// and the inner rect of the containing block (which we get from the reflow
// state)
//
// If either the left or top are 'auto' then get the offset of the anchor
// frame from this frame
nsPoint offset;
if ((eStyleUnit_Auto == aPosition->mLeftOffset.GetUnit()) ||
(eStyleUnit_Auto == aPosition->mTopOffset.GetUnit())) {
aAnchorFrame->GetOrigin(offset);
TranslatePoint(aAnchorFrame, offset);
}
// left-offset
if (eStyleUnit_Auto == aPosition->mLeftOffset.GetUnit()) {
// Use the current x-offset of the anchor frame translated into our
// coordinate space
aRect.x = offset.x;
} else if (eStyleUnit_Coord == aPosition->mLeftOffset.GetUnit()) {
aRect.x = aPosition->mLeftOffset.GetCoordValue();
} else {
NS_ASSERTION(eStyleUnit_Percent == aPosition->mLeftOffset.GetUnit(),
"unexpected offset type");
// Percentage values refer to the width of the containing block. If the
// width is unconstrained then just use 0
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableWidth) {
aRect.x = 0;
} else {
aRect.x = (nscoord)((float)aReflowState.availableWidth *
aPosition->mLeftOffset.GetPercentValue());
}
}
// top-offset
if (eStyleUnit_Auto == aPosition->mTopOffset.GetUnit()) {
// Use the current y-offset of the anchor frame translated into our
// coordinate space
aRect.y = offset.y;
} else if (eStyleUnit_Coord == aPosition->mTopOffset.GetUnit()) {
aRect.y = aPosition->mTopOffset.GetCoordValue();
} else {
NS_ASSERTION(eStyleUnit_Percent == aPosition->mTopOffset.GetUnit(),
"unexpected offset type");
// Percentage values refer to the height of the containing block. If the
// height is unconstrained then interpret it like 'auto'
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) {
aRect.y = offset.y;
} else {
aRect.y = (nscoord)((float)aReflowState.availableHeight *
aPosition->mTopOffset.GetPercentValue());
}
}
// XXX We aren't properly handling 'auto' width and height
// XXX The width/height represent the size of the content area only, and not
// the frame size...
// width
if (eStyleUnit_Auto == aPosition->mWidth.GetUnit()) {
// Use the right-edge of the containing block
aRect.width = aReflowState.availableWidth;
} else if (eStyleUnit_Coord == aPosition->mWidth.GetUnit()) {
aRect.width = aPosition->mWidth.GetCoordValue();
} else {
NS_ASSERTION(eStyleUnit_Percent == aPosition->mWidth.GetUnit(),
"unexpected width type");
// Percentage values refer to the width of the containing block
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableWidth) {
aRect.width = NS_UNCONSTRAINEDSIZE;
} else {
aRect.width = (nscoord)((float)aReflowState.availableWidth *
aPosition->mWidth.GetPercentValue());
}
}
// height
if (eStyleUnit_Auto == aPosition->mHeight.GetUnit()) {
// Allow it to be as high as it wants
aRect.height = NS_UNCONSTRAINEDSIZE;
} else if (eStyleUnit_Coord == aPosition->mHeight.GetUnit()) {
aRect.height = aPosition->mHeight.GetCoordValue();
} else {
NS_ASSERTION(eStyleUnit_Percent == aPosition->mHeight.GetUnit(),
"unexpected height type");
// Percentage values refer to the height of the containing block. If the
// height is unconstrained, then interpret it like 'auto' and make the
// height unconstrained
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) {
aRect.height = NS_UNCONSTRAINEDSIZE;
} else {
aRect.height = (nscoord)((float)aReflowState.availableHeight *
aPosition->mHeight.GetPercentValue());
}
}
}
/////////////////////////////////////////////////////////////////////////////
// Diagnostics
NS_IMETHODIMP
nsBodyFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Body", aResult);
}
NS_IMETHODIMP
nsBodyFrame::List(FILE* out, PRInt32 aIndent, nsIListFilter* aFilter) const
{
nsresult rv = nsBlockFrame::List(out, aIndent, aFilter);
// Output absolutely positioned frames
if (nsnull != mAbsoluteFrames) {
for (PRInt32 i = aIndent; --i >= 0; ) fputs(" ", out);
fprintf(out, "absolute-items <\n");
}
nsIFrame* f = mAbsoluteFrames;
while (nsnull != f) {
f->List(out, aIndent+1, aFilter);
f->GetNextSibling(f);
}
for (PRInt32 i = aIndent; --i >= 0; ) fputs(" ", out);
fputs(">\n", out);
return rv;
}