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-rw-r--r--tkhtml1/generic/htmltable.c1175
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diff --git a/tkhtml1/generic/htmltable.c b/tkhtml1/generic/htmltable.c
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+/*
+** Routines for doing layout of HTML tables
+**
+** Copyright (C) 1997-2000 D. Richard Hipp
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Library General Public
+** License as published by the Free Software Foundation; either
+** version 2 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** Library General Public License for more details.
+**
+** You should have received a copy of the GNU Library General Public
+** License along with this library; if not, write to the
+** Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+** Boston, MA 02111-1307, USA.
+**
+** Author contact information:
+** drh@acm.org
+** http://www.hwaci.com/drh/
+*/
+#include <tk.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <math.h>
+#include "htmltable.h"
+
+/*
+** Default values for various table style parameters
+*/
+#define DFLT_BORDER 0
+#define DFLT_CELLSPACING_3D 5
+#define DFLT_CELLSPACING_FLAT 0
+#define DFLT_CELLPADDING 2
+#define DFLT_HSPACE 0
+#define DFLT_VSPACE 0
+
+#if INTERFACE
+/*
+** Set parameter A to the maximum of A and B.
+*/
+#define SETMAX(A,B) if( (A)<(B) ){ (A) = (B); }
+#define MAX(A,B) ((A)<(B)?(B):(A))
+#endif
+
+/*
+** Return the appropriate cell spacing for the given table.
+*/
+static int CellSpacing(HtmlWidget *htmlPtr, HtmlElement *pTable){
+ char *z;
+ int relief;
+ int cellSpacing;
+
+ z = HtmlMarkupArg(pTable, "cellspacing", 0);
+ if( z==0 ){
+ relief = htmlPtr->tableRelief;
+ if( relief==TK_RELIEF_RAISED || relief==TK_RELIEF_SUNKEN ){
+ cellSpacing = DFLT_CELLSPACING_3D;
+ }else{
+ cellSpacing = DFLT_CELLSPACING_FLAT;
+ }
+ }else{
+ cellSpacing = atoi(z);
+ }
+ return cellSpacing;
+}
+
+/* Forward declaration */
+static HtmlElement *MinMax(HtmlWidget*, HtmlElement *, int *, int *, int);
+
+/* pStart points to a <table>. Compute the number of columns, the
+** minimum and maximum size for each column and the overall minimum
+** and maximum size for this table and store these value in the
+** pStart structure. Return a pointer to the </table> element,
+** or to NULL if there is no </table>.
+**
+** The min and max size for column N (where the leftmost column has
+** N==1) is pStart->minW[1] and pStart->maxW[1]. The pStart->minW[0]
+** and pStart->maxW[0] entries contain the minimum and maximum widths
+** of the whole table, including any cell padding, cell spacing,
+** border width and "hspace". The values of pStart->minW[I] for I>=1
+** do not contain any cell padding, cell spacing or border width.
+** Only pStart->minW[0] contains these extra spaces.
+**
+** The back references from </table>, </tr>, </td> and </th> back to
+** the <table> markup are also filled in. And for each <td> and <th>
+** markup, the pTable and pEnd fields are set to their proper values.
+*/
+static HtmlElement *TableDimensions(
+ HtmlWidget *htmlPtr, /* The HTML widget */
+ HtmlElement *pStart, /* The <table> markup */
+ int lineWidth /* Total widget available to the table */
+){
+ HtmlElement *p; /* Element being processed */
+ HtmlElement *pNext; /* Next element to process */
+ int iCol = 0; /* Current column number. 1..N */
+ int iRow = 0; /* Current row number */
+ int inRow = 0; /* True if in between <TR> and </TR> */
+ int i, j; /* Loop counters */
+ int n; /* Number of columns */
+ int minW, maxW, requestedW; /* min, max, requested width for a cell */
+ int noWrap; /* true for NOWRAP cells */
+ int colspan; /* Column span for the current cell */
+ int rowspan; /* Row span for the current cell */
+ char *z; /* Value of a <table> parameter */
+ int cellSpacing; /* Value of CELLSPACING parameter */
+ int cellPadding; /* Value of CELLPADDING parameter */
+ int tbw; /* Width of border around whole table */
+ int cbw; /* Width of border around one cell */
+ int hspace; /* Value of HSPACE parameter */
+ int separation; /* Space between columns */
+ int margin; /* Space between left margin and 1st col */
+ int availWidth; /* Part of lineWidth still available */
+ int maxTableWidth; /* Amount of lineWidth available to table*/
+ int fromAbove[HTML_MAX_COLUMNS+1]; /* Cell above extends thru this row */
+ int min0span[HTML_MAX_COLUMNS+1]; /* Min for colspan=0 cells */
+ int max0span[HTML_MAX_COLUMNS+1]; /* Max for colspan=0 cells */
+ int reqW[HTML_MAX_COLUMNS+1]; /* Requested width for each column */
+
+ /* colMin[A][B] is the absolute minimum width of all columns between
+ ** A+1 and B+1. colMin[B][A] is the requested width of columns between
+ ** A+1 and B+1. This information is used to add in the constraints imposed
+ ** by <TD COLSPAN=N> markup where N>=2.
+ */
+ int colMin[HTML_MAX_COLUMNS+1][HTML_MAX_COLUMNS+1];
+# define ColMin(A,B) colMin[(A)-1][(B)-1]
+# define ColReq(A,B) colMin[(B)-1][(A)-1]
+
+ if( pStart==0 || pStart->base.type!=Html_TABLE ){
+ TestPoint(0);
+ return pStart;
+ }
+ TRACE_PUSH(HtmlTrace_Table1);
+ TRACE(HtmlTrace_Table1, ("Starting TableDimensions..\n"));
+ pStart->table.nCol = 0;
+ pStart->table.nRow = 0;
+ z = HtmlMarkupArg(pStart, "border", 0);
+ if( z && *z==0 ) z = "2";
+ tbw = pStart->table.borderWidth = z ? atoi(z) : DFLT_BORDER;
+ cbw = tbw>0;
+ z = HtmlMarkupArg(pStart, "cellpadding", 0);
+ cellPadding = z ? atoi(z) : DFLT_CELLPADDING;
+ cellSpacing = CellSpacing(htmlPtr, pStart);
+#ifdef DEBUG
+ /* The HtmlTrace_Table4 flag causes tables to be draw with borders
+ ** of 2, cellPadding of 5 and cell spacing of 2. This makes the
+ ** table clearly visible. Useful for debugging. */
+ if( HtmlTraceMask & HtmlTrace_Table4 ){
+ tbw = pStart->table.borderWidth = 2;
+ cbw = 1;
+ cellPadding = 5;
+ cellSpacing = 2;
+ pStart->base.style.bgcolor = COLOR_Background;
+ }
+#endif
+ separation = cellSpacing + 2*(cellPadding + cbw);
+ margin = tbw + cellSpacing + cbw + cellPadding;
+ z = HtmlMarkupArg(pStart, "hspace", 0);
+ hspace = z ? atoi(z) : DFLT_HSPACE;
+
+ for(p=pStart->pNext; p && p->base.type!=Html_EndTABLE; p=pNext){
+ pNext = p->pNext;
+ switch( p->base.type ){
+ case Html_EndTD:
+ case Html_EndTH:
+ case Html_EndTABLE:
+ p->ref.pOther = pStart;
+ TestPoint(0);
+ break;
+ case Html_EndTR:
+ p->ref.pOther = pStart;
+ inRow = 0;
+ TestPoint(0);
+ break;
+ case Html_TR:
+ p->ref.pOther = pStart;
+ iRow++;
+ pStart->table.nRow++;
+ iCol = 0;
+ inRow = 1;
+ maxTableWidth = availWidth = lineWidth - 2*margin;
+ TestPoint(0);
+ break;
+ case Html_CAPTION:
+ while( p && p->base.type!=Html_EndTABLE
+ && p->base.type!=Html_EndCAPTION ){
+ p = p->pNext;
+ TestPoint(0);
+ }
+ break;
+ case Html_TD:
+ case Html_TH:
+ if( !inRow ){
+ /* If the <TR> markup is omitted, insert it. */
+ HtmlElement *pNew = HtmlAlloc( sizeof(HtmlRef) );
+ if( pNew==0 ) break;
+ memset(pNew, 0, sizeof(HtmlRef));
+ pNew->base = p->base;
+ pNew->base.pNext = p;
+ pNew->base.type = Html_TR;
+ pNew->base.count = 0;
+ p->base.pPrev->base.pNext = pNew;
+ p->base.pPrev = pNew;
+ pNext = pNew;
+ break;
+ }
+ do{
+ iCol++;
+ }while( iCol <= pStart->table.nCol && fromAbove[iCol] > iRow );
+ p->cell.pTable = pStart;
+ colspan = p->cell.colspan;
+ if( colspan==0 ){
+ colspan = 1;
+ }
+ if( iCol + colspan - 1 > pStart->table.nCol ){
+ int nCol = iCol + colspan - 1;
+ if( nCol > HTML_MAX_COLUMNS ){
+ nCol = HTML_MAX_COLUMNS;
+ }
+ for(i=pStart->table.nCol+1; i<=nCol; i++){
+ fromAbove[i] = 0;
+ pStart->table.minW[i] = 0;
+ pStart->table.maxW[i] = 0;
+ min0span[i] = 0;
+ max0span[i] = 0;
+ reqW[i] = 0;
+ for(j=1; j<i; j++){
+ ColMin(j,i) = 0;
+ ColReq(j,i) = 0;
+ }
+ }
+ pStart->table.nCol = nCol;
+ }
+ noWrap = HtmlMarkupArg(p, "nowrap", 0)!=0;
+ pNext = MinMax(htmlPtr, p, &minW, &maxW, availWidth);
+ p->cell.pEnd = pNext;
+ if( (z = HtmlMarkupArg(p, "width", 0))!=0 ){
+ for(i=0; isdigit(z[i]); i++){}
+ if( strcmp(z,"*")==0 ){
+ requestedW = availWidth;
+ }else if( z[i]==0 ){
+ requestedW = atoi(z);
+ }else if( z[i]=='%' ){
+ /* requestedW = (atoi(z)*availWidth + 99)/100; */
+ requestedW = (atoi(z)*maxTableWidth + 99)/100;
+ }
+ }else{
+ requestedW = 0;
+ }
+ TRACE(HtmlTrace_Table1,
+ ("Row %d Column %d: min=%d max=%d req=%d stop at %s\n",
+ iRow,iCol,minW,maxW,requestedW, HtmlTokenName(p->cell.pEnd)));
+ if( noWrap ){
+ minW = maxW;
+ }
+ if( iCol + p->cell.colspan <= HTML_MAX_COLUMNS ){
+ int min = 0;
+ if( p->cell.colspan==0 ){
+ SETMAX( min0span[iCol], minW );
+ SETMAX( max0span[iCol], maxW );
+ min = min0span[iCol] + separation;
+ }else if( colspan==1 ){
+ SETMAX( pStart->table.minW[iCol], minW );
+ SETMAX( pStart->table.maxW[iCol], maxW );
+ SETMAX( reqW[iCol], requestedW );
+ min = pStart->table.minW[iCol] + separation;
+ }else{
+ int n = p->cell.colspan;
+ SETMAX( ColMin(iCol,iCol+n-1), minW);
+ SETMAX( ColReq(iCol,iCol+n-1), requestedW);
+ min = minW + separation;
+#if 0
+ maxW = (maxW + (n - 1)*(1-separation))/n;
+ for(i=iCol; i<iCol + n && i<HTML_MAX_COLUMNS; i++){
+ SETMAX( pStart->table.maxW[i], maxW );
+ }
+#endif
+ }
+ availWidth -= min;
+ }
+ rowspan = p->cell.rowspan;
+ if( rowspan==0 ){
+ rowspan = LARGE_NUMBER;
+ }
+ if( rowspan>1 ){
+ for(i=iCol; i<iCol + p->cell.colspan && i<HTML_MAX_COLUMNS; i++){
+ fromAbove[i] = iRow + rowspan;
+ }
+ }
+ if( p->cell.colspan > 1 ){
+ iCol += p->cell.colspan - 1;
+ }else if( p->cell.colspan==0 ){
+ iCol = HTML_MAX_COLUMNS + 1;
+ }
+ break;
+ }
+ }
+
+#ifdef DEBUG
+ if( HtmlTraceMask & HtmlTrace_Table6 ){
+ char *zSpace = "";
+ TRACE_INDENT;
+ for(i=1; i<=pStart->table.nCol; i++){
+ printf("%s%d:%d..%d",zSpace,i,
+ pStart->table.minW[i],pStart->table.maxW[i]);
+ if( reqW[i]>0 ){
+ printf("(w=%d)",reqW[i]);
+ }
+ zSpace = " ";
+ }
+ printf("\n");
+ for(i=1; i<pStart->table.nCol; i++){
+ for(j=i+1; j<=pStart->table.nCol; j++){
+ if( ColMin(i,j)>0 ){
+ TRACE_INDENT;
+ printf("ColMin(%d,%d) = %d\n", i, j, ColMin(i,j));
+ }
+ if( ColReq(i,j)>0 ){
+ TRACE_INDENT;
+ printf("ColReq(%d,%d) = %d\n", i, j, ColReq(i,j));
+ }
+ }
+ }
+ }
+#endif
+
+ /* Compute the min and max width of each column
+ */
+ for(i=1; i<=pStart->table.nCol; i++){
+ int sumMin, sumReq, sumMax;
+
+ /* Reduce the max[] field to N for columns that have "width=N" */
+ if( reqW[i]>0 ){
+ pStart->table.maxW[i] = MAX(pStart->table.minW[i],reqW[i]);
+ }
+
+ /* Expand the width of columns marked with "colspan=0".
+ */
+ if( min0span[i]>0 || max0span[i]>0 ){
+ int n = pStart->table.nCol - i + 1;
+ minW = (min0span[i] + (n - 1)*(1-separation))/n;
+ maxW = (max0span[i] + (n - 1)*(1-separation))/n;
+ for(j=i; j<=pStart->table.nCol; j++){
+ SETMAX( pStart->table.minW[j], minW );
+ SETMAX( pStart->table.maxW[j], maxW );
+ }
+ }
+
+ /* Expand the minW[] of columns to accomodate "colspan=N" constraints.
+ ** The minW[] is expanded up to the maxW[] first. Then all the maxW[]s
+ ** are expanded in proportion to their sizes. The same thing occurs
+ ** for reqW[]s.
+ */
+ sumReq = reqW[i];
+ sumMin = pStart->table.minW[i];
+ sumMax = pStart->table.maxW[i];
+ for(j=i-1; j>=1; j--){
+ int cmin, creq;
+ sumMin += pStart->table.minW[j];
+ sumMax += pStart->table.maxW[j];
+ sumReq += reqW[i];
+ cmin = ColMin(j,i);
+ if( cmin>sumMin ){
+ int k;
+ double scale;
+ int *tminW = pStart->table.minW;
+ int *tmaxW = pStart->table.maxW;
+ if( sumMin<sumMax ){
+ scale = (double)(cmin - sumMin)/(double)(sumMax - sumMin);
+ for(k=j; k<=i; k++){
+ sumMin -= tminW[k];
+ tminW[k] = (tmaxW[k] - tminW[k])*scale + tminW[k];
+ sumMin += tminW[k];
+ }
+ }else if( sumMin>0 ){
+ scale = (double)cmin/(double)sumMin;
+ for(k=j; k<=i; k++){
+ sumMin -= tminW[k];
+ tminW[k] = tmaxW[k] = tminW[k]*scale;
+ sumMin += tminW[k];
+ }
+ }else{
+ int unit = cmin/(i-j+1);
+ for(k=j; k<=i; k++){
+ tminW[k] = tmaxW[k] = unit;
+ sumMin += tminW[k];
+ }
+ }
+ }
+ creq = ColReq(j,i);
+ if( creq>sumReq ){
+ int k;
+ double scale;
+ int *tmaxW = pStart->table.maxW;
+ if( sumReq<sumMax ){
+ scale = (double)(creq - sumReq)/(double)(sumMax - sumReq);
+ for(k=j; k<=i; k++){
+ sumReq -= reqW[k];
+ reqW[k] = (tmaxW[k] - reqW[k])*scale + reqW[k];
+ sumReq += reqW[k];
+ }
+ }else if( sumReq>0 ){
+ scale = (double)creq/(double)sumReq;
+ for(k=j; k<=i; k++){
+ sumReq -= reqW[k];
+ reqW[k] = reqW[k]*scale;
+ sumReq += reqW[k];
+ }
+ }else{
+ int unit = creq/(i-j+1);
+ for(k=j; k<=i; k++){
+ reqW[k] = unit;
+ sumReq += reqW[k];
+ }
+ }
+ }
+ }
+ }
+
+#ifdef DEBUG
+ if( HtmlTraceMask & HtmlTrace_Table6 ){
+ char *zSpace = "";
+ TRACE_INDENT;
+ for(i=1; i<=pStart->table.nCol; i++){
+ printf("%s%d:%d..%d",zSpace,i,
+ pStart->table.minW[i],pStart->table.maxW[i]);
+ if( reqW[i]>0 ){
+ printf("(w=%d)",reqW[i]);
+ }
+ zSpace = " ";
+ }
+ printf("\n");
+ }
+#endif
+
+ /* Compute the min and max width of the whole table
+ */
+ n = pStart->table.nCol;
+ requestedW = tbw*2 + (n+1)*cellSpacing + n*2*(cellPadding + cbw);
+ pStart->table.minW[0] = requestedW;
+ pStart->table.maxW[0] = requestedW;
+ for(i=1; i<=pStart->table.nCol; i++){
+ pStart->table.minW[0] += pStart->table.minW[i];
+ pStart->table.maxW[0] += pStart->table.maxW[i];
+ requestedW += MAX(reqW[i], pStart->table.minW[i]);
+ }
+
+ /* Figure out how wide to draw the table */
+ z = HtmlMarkupArg(pStart, "width", 0);
+ if( z ){
+ int len = strlen(z);
+ int totalWidth;
+ if( len>0 && z[len-1]=='%' ){
+ totalWidth = (atoi(z) * lineWidth)/100;
+ }else{
+ totalWidth = atoi(z);
+ }
+ SETMAX( requestedW, totalWidth );
+ }
+ if( lineWidth && (requestedW > lineWidth) ){
+ TRACE(HtmlTrace_Table5,("RequestedW reduced to lineWidth: %d -> %d\n",
+ requestedW, lineWidth));
+ requestedW = lineWidth;
+ }
+ if( requestedW > pStart->table.minW[0] ){
+ float scale;
+ int *tminW = pStart->table.minW;
+ int *tmaxW = pStart->table.maxW;
+ TRACE(HtmlTrace_Table5,
+ ("Expanding table minW from %d to %d. (reqW=%d width=%s)\n",
+ tminW[0], requestedW, requestedW, z));
+ if( tmaxW[0] > tminW[0] ){
+ scale = (double)(requestedW - tminW[0]) / (double)(tmaxW[0] - tminW[0]);
+ for(i=1; i<=pStart->table.nCol; i++){
+ tminW[i] += (tmaxW[i] - tminW[i]) * scale;
+ SETMAX(tmaxW[i], tminW[i]);
+ }
+ }else if( tminW[0]>0 ){
+ scale = requestedW/(double)tminW[0];
+ for(i=1; i<=pStart->table.nCol; i++){
+ tminW[i] *= scale;
+ tmaxW[i] *= scale;
+ }
+ }else if( pStart->table.nCol>0 ){
+ int unit = (requestedW - margin)/pStart->table.nCol - separation;
+ if( unit<0 ) unit = 0;
+ for(i=1; i<=pStart->table.nCol; i++){
+ tminW[i] = tmaxW[i] = unit;
+ }
+ }else{
+ tminW[0] = tmaxW[0] = requestedW;
+ }
+ pStart->table.minW[0] = requestedW;
+ SETMAX( pStart->table.maxW[0], requestedW );
+ }
+
+#ifdef DEBUG
+ if( HtmlTraceMask & HtmlTrace_Table5 ){
+ TRACE_INDENT;
+ printf("Start with %s and ", HtmlTokenName(pStart));
+ printf("end with %s\n", HtmlTokenName(p));
+ TRACE_INDENT;
+ printf("nCol=%d minWidth=%d maxWidth=%d\n",
+ pStart->table.nCol, pStart->table.minW[0], pStart->table.maxW[0]);
+ for(i=1; i<=pStart->table.nCol; i++){
+ TRACE_INDENT;
+ printf("Column %d minWidth=%d maxWidth=%d\n",
+ i, pStart->table.minW[i], pStart->table.maxW[i]);
+ }
+ }
+#endif
+
+ TRACE(HtmlTrace_Table1,
+ ("Result of TableDimensions: min=%d max=%d nCol=%d\n",
+ pStart->table.minW[0], pStart->table.maxW[0], pStart->table.nCol));
+ TRACE_POP(HtmlTrace_Table1);
+ return p;
+}
+
+/*
+** Given a list of elements, compute the minimum and maximum width needed
+** to render the list. Stop the search at the first element seen that is
+** in the following set:
+**
+** <tr> <td> <th> </tr> </td> </th> </table>
+**
+** Return a pointer to the element that stopped the search, or to NULL
+** if we ran out of data.
+**
+** Sometimes the value returned for both min and max will be larger than
+** the true minimum and maximum. This is rare, and only occurs if the
+** element string contains figures with flow-around text.
+*/
+static HtmlElement *MinMax(
+ HtmlWidget *htmlPtr, /* The Html widget */
+ HtmlElement *p, /* Start the search here */
+ int *pMin, /* Return the minimum width here */
+ int *pMax, /* Return the maximum width here */
+ int lineWidth /* Total width available */
+){
+ int min = 0; /* Minimum width so far */
+ int max = 0; /* Maximum width so far */
+ int indent = 0; /* Amount of indentation (minimum) */
+ int obstacle = 0; /* Possible obstacles in the margin */
+ int x1 = 0; /* Length of current line assuming maximum length */
+ int x2 = 0; /* Length of current line assuming minimum length */
+ int go = 1; /* Change to 0 to stop the loop */
+ HtmlElement *pNext; /* Next element in the list */
+
+ for(p=p->pNext; go && p; p = pNext){
+ pNext = p->pNext;
+ switch( p->base.type ){
+ case Html_Text:
+ x1 += p->text.w;
+ x2 += p->text.w;
+ if( p->base.style.flags & STY_Preformatted ){
+ SETMAX( min, x1 );
+ SETMAX( max, x1 );
+ }else{
+ SETMAX( min, x2 );
+ SETMAX( max, x1 );
+ }
+ break;
+ case Html_Space:
+ if( p->base.style.flags & STY_Preformatted ){
+ if( p->base.flags & HTML_NewLine ){
+ x1 = x2 = indent;
+ }else{
+ x1 += p->space.w * p->base.count;
+ x2 += p->space.w * p->base.count;
+ }
+ }else if( p->base.style.flags & STY_NoBreak ){
+ if( x1>indent ){ x1 += p->space.w; TestPoint(0);}
+ if( x2>indent ){ x2 += p->space.w; TestPoint(0);}
+ }else{
+ if( x1>indent ){ x1 += p->space.w; TestPoint(0);}
+ x2 = indent;
+ }
+ break;
+ case Html_IMG:
+ switch( p->image.align ){
+ case IMAGE_ALIGN_Left:
+ case IMAGE_ALIGN_Right:
+ obstacle += p->image.w;
+ x1 = obstacle + indent;
+ x2 = indent;
+ SETMAX( min, x2 );
+ SETMAX( min, p->image.w );
+ SETMAX( max, x1 );
+ break;
+ default:
+ x1 += p->image.w;
+ x2 += p->image.w;
+ if( p->base.style.flags & STY_Preformatted ){
+ SETMAX( min, x1 );
+ SETMAX( max, x1 );
+ }else{
+ SETMAX( min, x2 );
+ SETMAX( max, x1 );
+ }
+ break;
+ }
+ break;
+ case Html_TABLE:
+ /* pNext = TableDimensions(htmlPtr, p, lineWidth-indent); */
+ pNext = TableDimensions(htmlPtr, p, 0);
+ x1 = p->table.maxW[0] + indent + obstacle;
+ x2 = p->table.minW[0] + indent;
+ SETMAX( max, x1 );
+ SETMAX( min, x2 );
+ x1 = indent + obstacle;
+ x2 = indent;
+ if( pNext && pNext->base.type==Html_EndTABLE ){
+ pNext = pNext->pNext;
+ }
+ break;
+ case Html_UL:
+ case Html_OL:
+ indent += HTML_INDENT;
+ x1 = indent + obstacle;
+ x2 = indent;
+ break;
+ case Html_EndUL:
+ case Html_EndOL:
+ indent -= HTML_INDENT;
+ if( indent < 0 ){ indent = 0; }
+ x1 = indent + obstacle;
+ x2 = indent;
+ break;
+ case Html_BLOCKQUOTE:
+ indent += 2*HTML_INDENT;
+ x1 = indent + obstacle;
+ x2 = indent;
+ break;
+ case Html_EndBLOCKQUOTE:
+ indent -= 2*HTML_INDENT;
+ if( indent < 0 ){ indent = 0; }
+ x1 = indent + obstacle;
+ x2 = indent;
+ break;
+ case Html_APPLET:
+ case Html_INPUT:
+ case Html_SELECT:
+ case Html_EMBED:
+ case Html_TEXTAREA:
+ x1 += p->input.w + p->input.padLeft;
+ if( p->base.style.flags & STY_Preformatted ){
+ SETMAX( min, x1 );
+ SETMAX( max, x1 );
+ x2 += p->input.w + p->input.padLeft;
+ }else{
+ SETMAX( min, indent + p->input.w );
+ SETMAX( max, x1 );
+ x2 = indent;
+ }
+ break;
+ case Html_BR:
+ case Html_P:
+ case Html_EndP:
+ case Html_DIV:
+ case Html_EndDIV:
+ case Html_H1:
+ case Html_EndH1:
+ case Html_H2:
+ case Html_EndH2:
+ case Html_H3:
+ case Html_EndH3:
+ case Html_H4:
+ case Html_EndH4:
+ case Html_H5:
+ case Html_H6:
+ x1 = indent + obstacle;
+ x2 = indent;
+ break;
+ case Html_EndTD:
+ case Html_EndTH:
+ case Html_CAPTION:
+ case Html_EndTABLE:
+ case Html_TD:
+ case Html_TR:
+ case Html_TH:
+ case Html_EndTR:
+ go = 0;
+ break;
+ default:
+ break;
+ }
+ if( !go ){ break; }
+ }
+ *pMin = min;
+ *pMax = max;
+ return p;
+}
+
+/* Vertical alignments:
+*/
+#define VAlign_Unknown 0
+#define VAlign_Top 1
+#define VAlign_Bottom 2
+#define VAlign_Center 3
+#define VAlign_Baseline 4
+
+/*
+** Return the vertical alignment specified by the given element.
+*/
+static int GetVerticalAlignment(HtmlElement *p, int dflt){
+ char *z;
+ int rc;
+ if( p==0 ) return dflt;
+ z = HtmlMarkupArg(p, "valign", 0);
+ if( z==0 ){
+ rc = dflt;
+ TestPoint(0);
+ }else if( stricmp(z,"top")==0 ){
+ rc = VAlign_Top;
+ TestPoint(0);
+ }else if( stricmp(z,"bottom")==0 ){
+ rc = VAlign_Bottom;
+ TestPoint(0);
+ }else if( stricmp(z,"center")==0 ){
+ rc = VAlign_Center;
+ TestPoint(0);
+ }else if( stricmp(z,"baseline")==0 ){
+ rc = VAlign_Baseline;
+ TestPoint(0);
+ }else{
+ rc = dflt;
+ TestPoint(0);
+ }
+ return rc;
+}
+
+/* Do all layout for a single table. Return the </table> element or
+** NULL if the table is unterminated.
+*/
+HtmlElement *HtmlTableLayout(
+ HtmlLayoutContext *pLC, /* The layout context */
+ HtmlElement *pTable /* The <table> element */
+){
+ HtmlElement *pEnd; /* The </table> element */
+ HtmlElement *p; /* For looping thru elements of the table */
+ HtmlElement *pNext; /* Next element in the loop */
+ HtmlElement *pCaption; /* Start of the caption text. The <caption> */
+ HtmlElement *pEndCaption; /* End of the caption. The </caption> */
+ int width; /* Width of the table as drawn */
+ int cellSpacing; /* Value of cellspacing= parameter to <table> */
+ int cellPadding; /* Value of cellpadding= parameter to <table> */
+ int tbw; /* Width of the 3D border around the whole table */
+ int cbw; /* Width of the 3D border around a cell */
+ int pad; /* cellPadding + borderwidth */
+ char *z; /* A string */
+ int leftMargin; /* The left edge of space available for drawing */
+ int lineWidth; /* Total horizontal space available for drawing */
+ int separation; /* Distance between content of columns (or rows) */
+ int i; /* Loop counter */
+ int n; /* Number of columns */
+ int btm; /* Bottom edge of previous row */
+ int iRow; /* Current row number */
+ int iCol; /* Current column number */
+ int colspan; /* Number of columns spanned by current cell */
+ int vspace; /* Value of the vspace= parameter to <table> */
+ int hspace; /* Value of the hspace= parameter to <table> */
+ int rowBottom; /* Bottom edge of content in the current row */
+ int defaultVAlign; /* Default vertical alignment for the current row */
+ char *zAlign; /* Value of the ALIGN= attribute of the <TABLE> */
+#define N HTML_MAX_COLUMNS+1
+ int y[N]; /* Top edge of each cell's content */
+ int x[N]; /* Left edge of each cell's content */
+ int w[N]; /* Width of each cell's content */
+ int ymax[N]; /* Bottom edge of cell's content if valign=top */
+ HtmlElement *apElem[N]; /* The <td> or <th> for each cell in a row */
+ int firstRow[N]; /* First row on which a cell appears */
+ int lastRow[N]; /* Row to which each cell span's */
+ int valign[N]; /* Vertical alignment for each cell */
+ HtmlLayoutContext savedContext; /* Saved copy of the original pLC */
+ HtmlLayoutContext cellContext; /* Used to render a single cell */
+#ifdef TABLE_TRIM_BLANK
+ extern int HtmlLineWasBlank;
+#endif /* TABLE_TRIM_BLANK */
+
+ if( pTable==0 || pTable->base.type!=Html_TABLE ){
+ TestPoint(0);
+ return pTable;
+ }
+ TRACE_PUSH(HtmlTrace_Table2);
+ TRACE(HtmlTrace_Table2, ("Starting TableLayout() at %s\n",
+ HtmlTokenName(pTable)));
+
+ /* Figure how much horizontal space is available for rendering
+ ** this table. Store the answer in lineWidth. leftMargin is
+ ** the left-most X coordinate of the table. btm stores the top-most
+ ** Y coordinate.
+ */
+ HtmlComputeMargins(pLC, &leftMargin, &btm, &lineWidth);
+ TRACE(HtmlTrace_Table2, ("...btm=%d left=%d width=%d\n",
+ btm, leftMargin, lineWidth));
+
+ /* figure out how much space the table wants for each column,
+ ** and in total.. */
+ pEnd = TableDimensions(pLC->htmlPtr, pTable, lineWidth);
+
+ /* If we don't have enough horizontal space to accomodate the minimum table
+ ** width, then try to move down past some obstruction (such as an
+ ** <IMG ALIGN=LEFT>) to give us more room.
+ */
+ if( lineWidth < pTable->table.minW[0] ){
+ HtmlWidenLine(pLC, pTable->table.minW[0], &leftMargin, &btm, &lineWidth);
+ TRACE(HtmlTrace_Table2, ("Widen to btm=%d left=%d width=%d\n",
+ btm, leftMargin, lineWidth));
+ }
+ savedContext = *pLC;
+
+ /* Figure out how wide to draw the table
+ */
+ if( lineWidth < pTable->table.minW[0] ){
+ width = pTable->table.minW[0];
+ }else if( lineWidth <= pTable->table.maxW[0] ){
+ width = lineWidth;
+ }else{
+ width = pTable->table.maxW[0];
+ }
+
+
+ /* Compute the width and left edge position of every column in
+ ** the table */
+ z = HtmlMarkupArg(pTable, "cellpadding", 0);
+ cellPadding = z ? atoi(z) : DFLT_CELLPADDING;
+ cellSpacing = CellSpacing(pLC->htmlPtr, pTable);
+ z = HtmlMarkupArg(pTable, "vspace", 0);
+ vspace = z ? atoi(z) : DFLT_VSPACE;
+ z = HtmlMarkupArg(pTable, "hspace", 0);
+ hspace = z ? atoi(z) : DFLT_HSPACE;
+#ifdef DEBUG
+ if( HtmlTraceMask & HtmlTrace_Table4 ){
+ cellPadding = 5;
+ cellSpacing = 2;
+ if( vspace<2 ) vspace = 2;
+ if( hspace<2 ) hspace = 2;
+ }
+#endif
+ tbw = pTable->table.borderWidth;
+ cbw = (tbw>0);
+ pad = cellPadding + cbw;
+ separation = cellSpacing + 2*pad;
+ x[1] = leftMargin + tbw + cellSpacing + pad;
+ n = pTable->table.nCol;
+ if( n<=0 || pTable->table.maxW[0]<=0 ){
+ /* Abort if the table has no columns at all or if the total width
+ ** of the table is zero or less. */
+ return pEnd;
+ }
+ zAlign = HtmlMarkupArg(pTable, "align", "");
+ if( width < lineWidth ){
+ int align = pTable->base.style.align;
+ if( align==ALIGN_Right || stricmp(zAlign,"right")==0 ){
+ x[1] += lineWidth - width;
+ }else if( align==ALIGN_Center && stricmp(zAlign,"left")!=0 ){
+ x[1] += (lineWidth - width)/2;
+ }
+ }
+ if( width==pTable->table.maxW[0] ){
+ w[1] = pTable->table.maxW[1];
+ for(i=2; i<=n; i++){
+ w[i] = pTable->table.maxW[i];
+ x[i] = x[i-1] + w[i-1] + separation;
+ TestPoint(0);
+ }
+ }else if( width > pTable->table.maxW[0] ){
+ int *tmaxW = pTable->table.maxW;
+ double scale = ((double)width)/ (double)tmaxW[0];
+ w[1] = tmaxW[1] * scale;
+ for(i=2; i<=n; i++){
+ w[i] = tmaxW[i] * scale;
+ x[i] = x[i-1] + w[i-1] + separation;
+ TestPoint(0);
+ }
+ }else if( width > pTable->table.minW[0] ){
+ float scale;
+ int *tminW = pTable->table.minW;
+ int *tmaxW = pTable->table.maxW;
+ scale = (double)(width - tminW[0]) / (double)(tmaxW[0] - tminW[0]);
+ w[1] = tminW[1] + (tmaxW[1] - tminW[1]) * scale;
+ for(i=2; i<=n; i++){
+ w[i] = tminW[i] + (tmaxW[i] - tminW[i]) * scale;
+ x[i] = x[i-1] + w[i-1] + separation;
+ TestPoint(0);
+ }
+ }else{
+ w[1] = pTable->table.minW[1];
+ for(i=2; i<=n; i++){
+ w[i] = pTable->table.minW[i];
+ x[i] = x[i-1] + w[i-1] + separation;
+ TestPoint(0);
+ }
+ }
+ w[n] = width - ((x[n] - x[1]) + 2*(tbw + pad + cellSpacing));
+
+ /* Add notation to the pTable structure so that we will know where
+ ** to draw the outer box around the outside of the table.
+ */
+ btm += vspace;
+ pTable->table.y = btm;
+ pTable->table.x = x[1] - (tbw + cellSpacing + pad);
+ pTable->table.w = width;
+ SETMAX(pLC->maxX, pTable->table.x + pTable->table.w);
+ btm += tbw + cellSpacing;
+
+ /* Begin rendering rows of the table */
+ for(i=1; i<=n; i++){
+ firstRow[i] = 0;
+ lastRow[i] = 0;
+ apElem[i] = 0;
+ }
+ p = pTable->pNext;
+ rowBottom = btm;
+ for(iRow=1; iRow<=pTable->table.nRow; iRow++){
+ TRACE(HtmlTrace_Table2, ("Row %d: btm=%d\n",iRow,btm));
+ /* Find the start of the next row. Keep an eye out for the caption
+ ** while we search */
+ while( p && p->base.type!=Html_TR ){
+ if( p->base.type==Html_CAPTION ){
+ pCaption = p;
+ while( p && p!=pEnd && p->base.type!=Html_EndCAPTION ){
+ p = p->pNext;
+ }
+ pEndCaption = p;
+ }
+ TRACE(HtmlTrace_Table3, ("Skipping token %s\n", HtmlTokenName(p)));
+ p = p->pNext;
+ }
+ if( p==0 ){ TestPoint(0); break; }
+
+ /* Record default vertical alignment flag for this row */
+ defaultVAlign = GetVerticalAlignment(p, VAlign_Center);
+
+ /* Find every new cell on this row */
+ for(iCol=1; iCol<=pTable->table.nCol && iCol<HTML_MAX_COLUMNS; iCol++){
+ if( lastRow[iCol]<iRow ) ymax[iCol] = 0;
+ }
+ iCol = 0;
+ for(p=p->pNext; p && p->base.type!=Html_TR && p!=pEnd; p=pNext){
+ pNext = p->pNext;
+ TRACE(HtmlTrace_Table3, ("Processing token %s\n", HtmlTokenName(p)));
+ switch( p->base.type ){
+ case Html_TD:
+ case Html_TH:
+ /* Find the column number for this cell. Be careful to skip
+ ** columns which extend down to this row from prior rows */
+ do{
+ iCol++;
+ }while( iCol <= HTML_MAX_COLUMNS && lastRow[iCol] >= iRow );
+ TRACE(HtmlTrace_Table2,
+ ("Column %d: x=%d w=%d\n",iCol,x[iCol],w[iCol]));
+ /* Process the new cell. (Cells beyond the maximum number of
+ ** cells are simply ignored.) */
+ if( iCol <= HTML_MAX_COLUMNS ){
+ apElem[iCol] = p;
+ pNext = p->cell.pEnd;
+ if( p->cell.rowspan==0 ){
+ lastRow[iCol] = pTable->table.nRow;
+ }else{
+ lastRow[iCol] = iRow + p->cell.rowspan - 1;
+ }
+ firstRow[iCol] = iRow;
+
+ /* Set vertical alignment flag for this cell */
+ valign[iCol] = GetVerticalAlignment(p, defaultVAlign);
+
+ /* Render cell contents and record the height */
+ y[iCol] = btm + pad;
+ cellContext.htmlPtr = pLC->htmlPtr;
+ cellContext.pStart = p->pNext;
+ cellContext.pEnd = pNext;
+ cellContext.headRoom = 0;
+ cellContext.top = y[iCol];
+ cellContext.bottom = y[iCol];
+ cellContext.left = x[iCol];
+ cellContext.right = 0;
+ cellContext.pageWidth = x[iCol]+w[iCol];
+ colspan = p->cell.colspan;
+ if( colspan==0 ){
+ for(i=iCol+1; i<=pTable->table.nCol; i++){
+ cellContext.pageWidth += w[i] + separation;
+ lastRow[i] = lastRow[iCol];
+ }
+ }else if( colspan>1 ){
+ for(i=iCol+1; i<iCol+colspan; i++){
+ cellContext.pageWidth += w[i] + separation;
+ lastRow[i] = lastRow[iCol];
+ }
+ }
+ cellContext.maxX = 0;
+ cellContext.maxY = 0;
+ cellContext.leftMargin = 0;
+ cellContext.rightMargin = 0;
+ HtmlLock(cellContext.htmlPtr);
+ HtmlLayoutBlock(&cellContext);
+ if( HtmlUnlock(cellContext.htmlPtr) ) return 0;
+#ifdef TABLE_TRIM_BLANK
+ /*
+ * Cancel any trailing vertical whitespace caused
+ * by break markup
+ */
+ if (HtmlLineWasBlank)
+ cellContext.maxY -= cellContext.headRoom;
+#endif /* TABLE_TRIM_BLANK */
+ ymax[iCol] = cellContext.maxY;
+ SETMAX(ymax[iCol], y[iCol]);
+ HtmlClearMarginStack(&cellContext.leftMargin);
+ HtmlClearMarginStack(&cellContext.rightMargin);
+
+ /* Set coordinates of the cell border */
+ p->cell.x = x[iCol] - pad;
+ p->cell.y = btm;
+ p->cell.w = cellContext.pageWidth + 2*pad - x[iCol];
+ TRACE(HtmlTrace_Table2,
+ ("Column %d top=%d bottom=%d h=%d left=%d w=%d\n",
+ iCol, y[iCol], ymax[iCol], ymax[iCol]-y[iCol],
+ p->cell.x, p->cell.w));
+
+ /* Advance the column counter for cells spaning multiple columns */
+ if( colspan > 1 ){
+ iCol += colspan - 1;
+ }else if( colspan==0 ){
+ iCol = HTML_MAX_COLUMNS + 1;
+ }
+ }
+ break;
+
+ case Html_CAPTION:
+ /* Gotta remember where the caption is so we can render it
+ ** at the end */
+ pCaption = p;
+ while( pNext && pNext!=pEnd && pNext->base.type!=Html_EndCAPTION ){
+ pNext = pNext->pNext;
+ }
+ pEndCaption = pNext;
+ break;
+ }
+ }
+
+ /* Figure out how high to make this row. */
+ for(iCol=1; iCol<=pTable->table.nCol; iCol++){
+ if( lastRow[iCol] == iRow || iRow==pTable->table.nRow ){
+ SETMAX( rowBottom, ymax[iCol] );
+ }
+ }
+ TRACE(HtmlTrace_Table2, ("Total row height: %d..%d -> %d\n",
+ btm,rowBottom,rowBottom-btm));
+
+ /* Position every cell whose bottom edge ends on this row */
+ for(iCol=1; iCol<=pTable->table.nCol; iCol++){
+ int dy; /* Extra space at top of cell used for vertical alignment */
+
+ /* Skip any unused cells or cells that extend down thru
+ ** subsequent rows */
+ if( apElem[iCol]==0
+ || (iRow!=pTable->table.nRow && lastRow[iCol]>iRow) ){ continue; }
+
+ /* Align the contents of the cell vertically. */
+ switch( valign[iCol] ){
+ case VAlign_Unknown:
+ case VAlign_Center:
+ dy = (rowBottom - ymax[iCol])/2;
+ break;
+ case VAlign_Top:
+ case VAlign_Baseline:
+ dy = 0;
+ break;
+ case VAlign_Bottom:
+ dy = rowBottom - ymax[iCol];
+ break;
+ }
+ if( dy ){
+ HtmlElement *pLast = apElem[iCol]->cell.pEnd;
+ TRACE(HtmlTrace_Table3, ("Delta column %d by %d\n",iCol,dy));
+ HtmlMoveVertically(apElem[iCol]->pNext, pLast, dy);
+ }
+
+ /* Record the height of the cell so that the border can be drawn */
+ apElem[iCol]->cell.h = rowBottom + pad - apElem[iCol]->cell.y;
+ apElem[iCol] = 0;
+ }
+
+ /* Update btm to the height of the row we just finished setting */
+ btm = rowBottom + pad + cellSpacing;
+ }
+
+ btm += tbw;
+ pTable->table.h = btm - pTable->table.y;
+ SETMAX( pLC->maxY, btm );
+ pLC->bottom = btm + vspace;
+
+ /* Render the caption, if there is one */
+ if( pCaption ){
+ }
+
+ /* Whenever we do any table layout, we need to recompute all the
+ ** HtmlBlocks. The following statement forces this. */
+ pLC->htmlPtr->firstBlock = pLC->htmlPtr->lastBlock = 0;
+
+ /* Adjust the context for text that wraps around the table, if
+ ** requested by an ALIGN=RIGHT or ALIGN=LEFT attribute.
+ */
+ if( stricmp(zAlign,"left")==0 ){
+ savedContext.maxX = pLC->maxX;
+ savedContext.maxY = pLC->maxY;
+ *pLC = savedContext;
+ HtmlPushMargin(&pLC->leftMargin, pTable->table.w + 2,
+ pTable->table.y + pTable->table.h + 2, 0);
+ }else if( stricmp(zAlign,"right")==0 ){
+ savedContext.maxX = pLC->maxX;
+ savedContext.maxY = pLC->maxY;
+ *pLC = savedContext;
+ HtmlPushMargin(&pLC->rightMargin, pTable->table.w + 2,
+ pTable->table.y + pTable->table.h + 2, 0);
+ }
+
+ /* All done */
+ TRACE(HtmlTrace_Table2, (
+ "Done with TableLayout(). x=%d y=%d w=%d h=%d Return %s\n",
+ pTable->table.x, pTable->table.y, pTable->table.w, pTable->table.h,
+ HtmlTokenName(pEnd)));
+ TRACE_POP(HtmlTrace_Table2);
+ return pEnd;
+}
+
+
+/*
+** Move all elements in the given list vertically by the amount dy
+*/
+void HtmlMoveVertically(
+ HtmlElement *p, /* First element to move */
+ HtmlElement *pLast, /* Last element. Do move this one */
+ int dy /* Amount by which to move */
+){
+ if( dy==0 ){ TestPoint(0); return; }
+ while( p && p!=pLast ){
+ switch( p->base.type ){
+ case Html_A:
+ p->anchor.y += dy;
+ break;
+ case Html_Text:
+ p->text.y += dy;
+ break;
+ case Html_LI:
+ p->li.y += dy;
+ break;
+ case Html_TD:
+ case Html_TH:
+ p->cell.y += dy;
+ break;
+ case Html_TABLE:
+ p->table.y += dy;
+ break;
+ case Html_IMG:
+ p->image.y += dy;
+ break;
+ case Html_INPUT:
+ case Html_SELECT:
+ case Html_APPLET:
+ case Html_EMBED:
+ case Html_TEXTAREA:
+ p->input.y += dy;
+ break;
+ default:
+ break;
+ }
+ p = p->pNext;
+ }
+}