Files
tubestation/layout/tables/nsTableCellFrame.cpp
buster b121968466 added an optimization that skips pass2 cell reflows when the new available width is unchanged
from the prior available width.  Some real-world test cases sped up
1-2 orders of magnitude for resize reflow.  Initial reflow is unchanged because
we still need to get pass1 metrics on all content.
fixed nsCSSBlockFrame.cpp to take margins into account when computing parent's available width
fixed distribution of excess space to table cells when table is bigger than the content it holds.
not quite finished yet, but better.
1998-07-02 17:40:56 +00:00

639 lines
20 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.
*/
#include "nsTableCellFrame.h"
#include "nsCellLayoutData.h"
#include "nsBodyFrame.h"
#include "nsIReflowCommand.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIRenderingContext.h"
#include "nsCSSRendering.h"
#include "nsIContent.h"
#include "nsIContentDelegate.h"
#include "nsCSSLayout.h"
#include "nsHTMLValue.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLIIDs.h"
#include "nsIPtr.h"
#include "nsIView.h"
// dependancy on content
#include "nsHTMLTagContent.h"
NS_DEF_PTR(nsIStyleContext);
const nsIID kTableCellFrameCID = NS_TABLECELLFRAME_CID;
#ifdef NS_DEBUG
static PRBool gsDebug = PR_FALSE;
static PRBool gsDebugNT = PR_FALSE;
//#define NOISY_STYLE
//#define NOISY_FLOW
#else
static const PRBool gsDebug = PR_FALSE;
static const PRBool gsDebugNT = PR_FALSE;
#endif
/**
*/
nsTableCellFrame::nsTableCellFrame(nsIContent* aContent,
nsIFrame* aParentFrame)
: nsContainerFrame(aContent, aParentFrame),
mCellLayoutData(nsnull)
{
mRowSpan=1;
mColSpan=1;
mColIndex=0;
mPriorAvailWidth=0;
}
nsTableCellFrame::~nsTableCellFrame()
{
if (nsnull!=mCellLayoutData)
delete mCellLayoutData;
}
NS_METHOD nsTableCellFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
const nsStyleDisplay* disp =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (disp->mVisible) {
const nsStyleColor* myColor =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* mySpacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
NS_ASSERTION(nsnull!=myColor, "bad style color");
NS_ASSERTION(nsnull!=mySpacing, "bad style spacing");
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, mRect, *myColor);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, mRect, *mySpacing, 0);
}
// for debug...
if (nsIFrame::GetShowFrameBorders()) {
aRenderingContext.SetColor(NS_RGB(0,128,128));
aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect);
return NS_OK;
}
/**
*
* Align the cell's child frame within the cell
*
**/
void nsTableCellFrame::VerticallyAlignChild(nsIPresContext* aPresContext)
{
const nsStyleSpacing* spacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
const nsStyleText* textStyle =
(const nsStyleText*)mStyleContext->GetStyleData(eStyleStruct_Text);
nsMargin borderPadding;
spacing->CalcBorderPaddingFor(this, borderPadding);
nscoord topInset = borderPadding.top;
nscoord bottomInset = borderPadding.bottom;
PRUint8 verticalAlignFlags = NS_STYLE_VERTICAL_ALIGN_MIDDLE;
if (textStyle->mVerticalAlign.GetUnit() == eStyleUnit_Enumerated) {
verticalAlignFlags = textStyle->mVerticalAlign.GetIntValue();
}
nscoord height = mRect.height;
nsRect kidRect;
mFirstChild->GetRect(kidRect);
nscoord childHeight = kidRect.height;
// Vertically align the child
nscoord kidYTop = 0;
switch (verticalAlignFlags)
{
case NS_STYLE_VERTICAL_ALIGN_BASELINE:
// Align the child's baseline at the max baseline
//kidYTop = aMaxAscent - kidAscent;
break;
case NS_STYLE_VERTICAL_ALIGN_TOP:
// Align the top of the child frame with the top of the box,
// minus the top padding
kidYTop = topInset;
break;
case NS_STYLE_VERTICAL_ALIGN_BOTTOM:
kidYTop = height - childHeight - bottomInset;
break;
default:
case NS_STYLE_VERTICAL_ALIGN_MIDDLE:
kidYTop = height/2 - childHeight/2;
}
mFirstChild->MoveTo(kidRect.x, kidYTop);
}
void nsTableCellFrame::CreatePsuedoFrame(nsIPresContext* aPresContext)
{
// Do we have a prev-in-flow?
if (nsnull == mPrevInFlow) {
// No, create a column pseudo frame
nsBodyFrame::NewFrame(&mFirstChild, mContent, this);
mChildCount = 1;
// Resolve style and set the style context
nsIStyleContext* styleContext =
aPresContext->ResolveStyleContextFor(mContent, this); // styleContext: ADDREF++
mFirstChild->SetStyleContext(aPresContext,styleContext);
NS_RELEASE(styleContext); // styleContext: ADDREF--
} else {
nsTableCellFrame* prevFrame = (nsTableCellFrame *)mPrevInFlow;
nsIFrame* prevPseudoFrame = prevFrame->mFirstChild;
NS_ASSERTION(prevFrame->ChildIsPseudoFrame(prevPseudoFrame), "bad previous pseudo-frame");
// Create a continuing column
nsIStyleContext* kidSC;
prevPseudoFrame->GetStyleContext(aPresContext, kidSC);
prevPseudoFrame->CreateContinuingFrame(aPresContext, this, kidSC, mFirstChild);
NS_RELEASE(kidSC);
mChildCount = 1;
}
}
/*
* Should this be performanced tuned? This is called
* in resize/reflow. Maybe we should cache the table
* frame in the table cell frame.
*
*/
nsTableFrame* nsTableCellFrame::GetTableFrame()
{
nsIFrame* frame = nsnull;
nsresult result;
result = GetContentParent(frame); // Get RowFrame
if ((result == NS_OK) && (frame != nsnull))
frame->GetContentParent(frame); // Get RowGroupFrame
if ((result == NS_OK) && (frame != nsnull))
frame->GetContentParent(frame); // Get TableFrame
return (nsTableFrame*)frame;
}
/**
*/
NS_METHOD nsTableCellFrame::Reflow(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus)
{
NS_PRECONDITION(nsnull!=aPresContext, "bad arg");
#ifdef NS_DEBUG
//PreReflowCheck();
#endif
// Initialize out parameter
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = 0;
aDesiredSize.maxElementSize->height = 0;
}
aStatus = NS_FRAME_COMPLETE;
if (PR_TRUE==gsDebug || PR_TRUE==gsDebugNT)
printf("%p nsTableCellFrame::Reflow: maxSize=%d,%d\n",
this, aReflowState.maxSize.width, aReflowState.maxSize.height);
mFirstContentOffset = mLastContentOffset = 0;
nsSize availSize(aReflowState.maxSize);
nsSize maxElementSize;
nsSize *pMaxElementSize = aDesiredSize.maxElementSize;
if (NS_UNCONSTRAINEDSIZE==aReflowState.maxSize.width)
pMaxElementSize = &maxElementSize;
nscoord x = 0;
// SEC: what about ascent and decent???
// Compute the insets (sum of border and padding)
const nsStyleSpacing* spacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsMargin borderPadding;
spacing->CalcBorderPaddingFor(this, borderPadding);
nscoord topInset = borderPadding.top;
nscoord rightInset = borderPadding.right;
nscoord bottomInset = borderPadding.bottom;
nscoord leftInset = borderPadding.left;
// Get the margin information, available space should
// be reduced accordingly
nsMargin margin(0,0,0,0);
nsTableFrame* tableFrame = GetTableFrame();
tableFrame->GetCellMarginData(this,margin);
mLastContentIsComplete = PR_TRUE;
// get frame, creating one if needed
if (nsnull==mFirstChild)
{
CreatePsuedoFrame(aPresContext);
}
// reduce available space by insets
if (NS_UNCONSTRAINEDSIZE!=availSize.width)
availSize.width -= leftInset+rightInset+margin.left+margin.right;
if (NS_UNCONSTRAINEDSIZE!=availSize.height)
availSize.height -= topInset+bottomInset+margin.top+margin.bottom;
// Try to reflow the child into the available space. It might not
// fit or might need continuing.
if (availSize.height < 0)
availSize.height = 1;
nsSize maxKidElementSize;
if (gsDebug==PR_TRUE)
printf(" nsTableCellFrame::ResizeReflow calling ReflowChild with availSize=%d,%d\n",
availSize.width, availSize.height);
nsReflowMetrics kidSize(pMaxElementSize);
kidSize.width=kidSize.height=kidSize.ascent=kidSize.descent=0;
SetPriorAvailWidth(aReflowState.maxSize.width);
nsReflowState kidReflowState(mFirstChild, aReflowState, availSize);
mFirstChild->WillReflow(*aPresContext);
mFirstChild->MoveTo(leftInset, topInset);
aStatus = ReflowChild(mFirstChild, aPresContext, kidSize, kidReflowState);
if (PR_TRUE==gsDebug || PR_TRUE==gsDebugNT)
{
if (nsnull!=pMaxElementSize)
printf(" %p cellFrame child returned desiredSize=%d,%d,\
and maxElementSize=%d,%d\n",
this, kidSize.width, kidSize.height,
pMaxElementSize->width, pMaxElementSize->height);
else
printf(" %p cellFrame child returned desiredSize=%d,%d,\
and maxElementSize=nsnull\n",
this, kidSize.width, kidSize.height);
}
SetFirstContentOffset(mFirstChild);
//if (gsDebug) printf("CELL: set first content offset to %d\n", GetFirstContentOffset()); //@@@
SetLastContentOffset(mFirstChild);
//if (gsDebug) printf("CELL: set last content offset to %d\n", GetLastContentOffset()); //@@@
// Place the child
mFirstChild->SetRect(nsRect(leftInset, topInset,
kidSize.width, kidSize.height));
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
// If the child didn't finish layout then it means that it used
// up all of our available space (or needs us to split).
mLastContentIsComplete = PR_FALSE;
}
// Return our size and our result
// first, compute the height
// the height can be set w/o being restricted by aMaxSize.height
nscoord cellHeight = kidSize.height;
if (NS_UNCONSTRAINEDSIZE!=aReflowState.maxSize.height)
{
cellHeight += topInset + bottomInset;
}
if (PR_TRUE==gsDebugNT)
printf(" %p cellFrame height set to %d from kidSize=%d and insets %d,%d\n",
this, cellHeight, kidSize.height, topInset, bottomInset);
// next determine the cell's width
nscoord cellWidth = kidSize.width; // at this point, we've factored in the cell's style attributes
// if we're really in a constrained situation, factor in insets
if (NS_UNCONSTRAINEDSIZE!=aReflowState.maxSize.width)
{
NS_ASSERTION(NS_UNCONSTRAINEDSIZE!=cellWidth, "child says it has unconstrained width in a constrained case");
cellWidth += leftInset + rightInset;
}
// Nav4 hack for 0 width cells. If the cell has any content, it must have a desired width of at least 1
/*
if (0==cellWidth)
{
PRInt32 childCount;
mFirstChild->ChildCount(childCount);
if (0!=childCount)
{
nsIFrame *grandChild;
mFirstChild->FirstChild(grandChild);
grandChild->ChildCount(childCount);
if (0!=childCount)
{
cellWidth=1;
if (nsnull!=aDesiredSize.maxElementSize && 0==pMaxElementSize->width)
pMaxElementSize->width=1;
}
}
}
*/
// end Nav4 hack for 0 width cells
// set the cell's desired size and max element size
aDesiredSize.width = cellWidth;
aDesiredSize.height = cellHeight;
aDesiredSize.ascent = topInset;
aDesiredSize.descent = bottomInset;
if (nsnull!=aDesiredSize.maxElementSize)
{
*aDesiredSize.maxElementSize = *pMaxElementSize;
if (NS_UNCONSTRAINEDSIZE!=aReflowState.maxSize.height)
aDesiredSize.maxElementSize->height += topInset + bottomInset;
if (NS_UNCONSTRAINEDSIZE!=aReflowState.maxSize.width)
aDesiredSize.maxElementSize->width += leftInset + rightInset;
}
if (PR_TRUE==gsDebug || PR_TRUE==gsDebugNT)
printf(" %p cellFrame returning aDesiredSize=%d,%d\n",
this, aDesiredSize.width, aDesiredSize.height);
#ifdef NS_DEBUG
//PostReflowCheck(result);
#endif
return NS_OK;
}
NS_METHOD
nsTableCellFrame::CreateContinuingFrame(nsIPresContext* aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame)
{
nsTableCellFrame* cf = new nsTableCellFrame(mContent, aParent);
if (nsnull == cf) {
return NS_ERROR_OUT_OF_MEMORY;
}
PrepareContinuingFrame(aPresContext, aParent, aStyleContext, cf);
aContinuingFrame = cf;
return NS_OK;
}
/**
*
* Update the border style to map to the HTML border style
*
*/
void nsTableCellFrame::MapHTMLBorderStyle(nsIPresContext* aPresContext, nsStyleSpacing& aSpacingStyle, nscoord aBorderWidth)
{
nsStyleCoord width;
width.SetCoordValue(aBorderWidth);
aSpacingStyle.mBorder.SetTop(width);
aSpacingStyle.mBorder.SetLeft(width);
aSpacingStyle.mBorder.SetBottom(width);
aSpacingStyle.mBorder.SetRight(width);
aSpacingStyle.mBorderStyle[NS_SIDE_TOP] = NS_STYLE_BORDER_STYLE_SOLID;
aSpacingStyle.mBorderStyle[NS_SIDE_LEFT] = NS_STYLE_BORDER_STYLE_SOLID;
aSpacingStyle.mBorderStyle[NS_SIDE_BOTTOM] = NS_STYLE_BORDER_STYLE_SOLID;
aSpacingStyle.mBorderStyle[NS_SIDE_RIGHT] = NS_STYLE_BORDER_STYLE_SOLID;
nsTableFrame* tableFrame = GetTableFrame();
nsIStyleContext* styleContext = nsnull;
tableFrame->GetStyleContext(aPresContext,styleContext);
const nsStyleColor* colorData = (const nsStyleColor*)styleContext->GetStyleData(eStyleStruct_Color);
// Look until we find a style context with a NON-transparent background color
while (styleContext)
{
if ((colorData->mBackgroundFlags & NS_STYLE_BG_COLOR_TRANSPARENT)!=0)
{
nsIStyleContext* temp = styleContext;
styleContext = styleContext->GetParent();
NS_RELEASE(temp);
colorData = (const nsStyleColor*)styleContext->GetStyleData(eStyleStruct_Color);
}
else
{
break;
}
}
// Yaahoo, we found a style context which has a background color
nscolor borderColor = 0xFFC0C0C0;
if (styleContext != nsnull)
borderColor = colorData->mBackgroundColor;
// if the border color is white, then shift to grey
if (borderColor == 0xFFFFFFFF)
borderColor = 0xFFC0C0C0;
aSpacingStyle.mBorderColor[NS_SIDE_TOP] =
aSpacingStyle.mBorderColor[NS_SIDE_LEFT] =
aSpacingStyle.mBorderColor[NS_SIDE_BOTTOM] =
aSpacingStyle.mBorderColor[NS_SIDE_RIGHT] = borderColor;
}
PRBool nsTableCellFrame::ConvertToPixelValue(nsHTMLValue& aValue, PRInt32 aDefault, PRInt32& aResult)
{
PRInt32 result = 0;
if (aValue.GetUnit() == eHTMLUnit_Pixel)
aResult = aValue.GetPixelValue();
else if (aValue.GetUnit() == eHTMLUnit_Empty)
aResult = aDefault;
else
{
NS_ERROR("Unit must be pixel or empty");
return PR_FALSE;
}
return PR_TRUE;
}
void nsTableCellFrame::MapBorderMarginPadding(nsIPresContext* aPresContext)
{
// Check to see if the table has either cell padding or
// Cell spacing defined for the table. If true, then
// this setting overrides any specific border, margin or
// padding information in the cell. If these attributes
// are not defined, the the cells attributes are used
nscoord padding = 0;
nscoord spacing = 0;
nscoord border = 1;
float p2t = aPresContext->GetPixelsToTwips();
nsTableFrame* tableFrame = GetTableFrame();
tableFrame->GetGeometricParent((nsIFrame *&)tableFrame); // get the outer frame
NS_ASSERTION(tableFrame,"Table Must not be null");
if (!tableFrame)
return;
// get the table frame style context, and from it get cellpadding, cellspacing, and border info
nsIStyleContextPtr tableSC;
tableFrame->GetStyleContext(aPresContext, tableSC.AssignRef());
nsStyleTable* tableStyle = (nsStyleTable*)tableSC->GetStyleData(eStyleStruct_Table);
nsStyleSpacing* tableSpacingStyle = (nsStyleSpacing*)tableSC->GetStyleData(eStyleStruct_Spacing);
nsStyleSpacing* spacingData = (nsStyleSpacing*)mStyleContext->GetMutableStyleData(eStyleStruct_Spacing);
// check to see if cellpadding or cellspacing is defined
if (tableStyle->mCellPadding.GetUnit() != eStyleUnit_Null ||
tableStyle->mCellSpacing.GetUnit() != eStyleUnit_Null)
{
spacingData->mMargin.SetTop(tableStyle->mCellSpacing);
spacingData->mMargin.SetLeft(tableStyle->mCellSpacing);
spacingData->mMargin.SetBottom(tableStyle->mCellSpacing);
spacingData->mMargin.SetRight(tableStyle->mCellSpacing);
spacingData->mPadding.SetTop(tableStyle->mCellPadding);
spacingData->mPadding.SetLeft(tableStyle->mCellPadding);
spacingData->mPadding.SetBottom(tableStyle->mCellPadding);
spacingData->mPadding.SetRight(tableStyle->mCellPadding);
}
// get border information from the table
if (tableSpacingStyle->mBorder.GetTopUnit() == eStyleUnit_Coord)
{
nsStyleCoord borderWidth;
tableSpacingStyle->mBorder.GetTop(borderWidth);
if (0!=borderWidth.GetCoordValue())
{
// in HTML, cell borders are always 1 pixel by default
border = (nscoord)(1*(aPresContext->GetPixelsToTwips()));
MapHTMLBorderStyle(aPresContext, *spacingData, border);
}
}
}
void nsTableCellFrame::MapTextAttributes(nsIPresContext* aPresContext)
{
nsHTMLValue value;
((nsHTMLTagContent*)mContent)->GetAttribute(nsHTMLAtoms::align, value);
if (value.GetUnit() == eHTMLUnit_Enumerated)
{
nsStyleText* text = (nsStyleText*)mStyleContext->GetMutableStyleData(eStyleStruct_Text);
text->mTextAlign = value.GetIntValue();
}
}
// Subclass hook for style post processing
NS_METHOD nsTableCellFrame::DidSetStyleContext(nsIPresContext* aPresContext)
{
#ifdef NOISY_STYLE
printf("nsTableCellFrame::DidSetStyleContext \n");
#endif
MapTextAttributes(aPresContext);
MapBorderMarginPadding(aPresContext);
mStyleContext->RecalcAutomaticData(aPresContext);
return NS_OK;
}
NS_METHOD
nsTableCellFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kTableCellFrameCID)) {
*aInstancePtr = (void*) (this);
return NS_OK;
}
return nsContainerFrame::QueryInterface(aIID, aInstancePtr);
}
/* ----- static methods ----- */
nsresult nsTableCellFrame::NewFrame(nsIFrame** aInstancePtrResult,
nsIContent* aContent,
nsIFrame* aParent)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
nsIFrame* it = new nsTableCellFrame(aContent, aParent);
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aInstancePtrResult = it;
return NS_OK;
}
// For Debugging ONLY
NS_METHOD nsTableCellFrame::MoveTo(nscoord aX, nscoord aY)
{
if ((aX != mRect.x) || (aY != mRect.y)) {
mRect.x = aX;
mRect.y = aY;
nsIView* view;
GetView(view);
// Let the view know
if (nsnull != view) {
// Position view relative to it's parent, not relative to our
// parent frame (our parent frame may not have a view).
nsIView* parentWithView;
nsPoint origin;
GetOffsetFromView(origin, parentWithView);
view->SetPosition(origin.x, origin.y);
NS_IF_RELEASE(parentWithView);
}
}
return NS_OK;
}
NS_METHOD nsTableCellFrame::SizeTo(nscoord aWidth, nscoord aHeight)
{
mRect.width = aWidth;
mRect.height = aHeight;
nsIView* view;
GetView(view);
// Let the view know
if (nsnull != view) {
view->SetDimensions(aWidth, aHeight);
}
return NS_OK;
}