/*@z23.c:Galley Printer:ScaleFactor()@****************************************/
/* */
/* THE LOUT DOCUMENT FORMATTING SYSTEM (VERSION 3.22) */
/* COPYRIGHT (C) 1991, 2000 Jeffrey H. Kingston */
/* */
/* Jeffrey H. Kingston (jeff@cs.usyd.edu.au) */
/* Basser Department of Computer Science */
/* The University of Sydney 2006 */
/* AUSTRALIA */
/* */
/* This program is free software; you can redistribute it and/or modify */
/* it under the terms of the GNU General Public License as published by */
/* the Free Software Foundation; either Version 2, or (at your option) */
/* any later version. */
/* */
/* This program 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 General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA */
/* */
/* FILE: z23.c */
/* MODULE: Galley Printer */
/* EXTERNS: FixAndPrintObject() */
/* */
/*****************************************************************************/
#include "externs.h"
#define NO_SUPPRESS FALSE
#define SUPPRESS TRUE
#define word_equal(x, str) (is_word(type(x)) && StringEqual(string(x), str))
/*****************************************************************************/
/* */
/* static float ScaleFactor(avail_size, inner_size) */
/* */
/* Return the scale factor for this scaling, or 0 if impossible. */
/* */
/*****************************************************************************/
static float ScaleFactor(FULL_LENGTH avail_size, FULL_LENGTH inner_size)
{ float scale_factor;
scale_factor = avail_size <= 0 ? 0 :
inner_size <= 0 ? 0 : (float) avail_size / inner_size;
return scale_factor;
}
/*@::FindAdjustIncrement()@***************************************************/
/* */
/* static FULL_LENGTH FindAdjustIncrement(x, frame_size, dim) */
/* */
/* Find the amount by which to increase the width of the subobjects of */
/* concatenation object x so that it is adjusted to fill size frame_size. */
/* */
/*****************************************************************************/
static FULL_LENGTH FindAdjustIncrement(OBJECT x, FULL_LENGTH frame_size,int dim)
{ OBJECT y, link, prev, g;
int adjustable_gaps; BOOLEAN jn;
FULL_LENGTH inc, mk, actual_size;
debug2(DGP, DD, "FindAdjustIncrement(x, %s, %s)",
EchoLength(frame_size), dimen(dim));
FirstDefinite(x, link, prev, jn);
if( link != x )
{ adjustable_gaps = 0;
mk = back(prev, dim);
NextDefiniteWithGap(x, link, y, g, jn);
while( link != x )
{ if ( mode(gap(g)) == TAB_MODE || units(gap(g)) == AVAIL_UNIT
|| units(gap(g)) == FRAME_UNIT )
{ debug0(DGP, DD, "FindAdjustIncrement returning 0 (tab gap)");
return 0;
}
mk += ActualGap(fwd(prev, dim), back(y, dim), fwd(y, dim), &gap(g),
frame_size, mk);
prev = y;
adjustable_gaps++;
NextDefiniteWithGap(x, link, y, g, jn);
}
actual_size = mk + fwd(prev, dim);
debug2(DGP, DD, " actual_size = %s, adjustable_gaps = %d",
EchoLength(actual_size), adjustable_gaps);
inc = adjustable_gaps==0 ? 0 : (frame_size - actual_size) / adjustable_gaps;
}
else inc = 0;
debug1(DGP, DD, "FindAdjustIncrement returning %s", EchoLength(inc));
return inc;
} /* end FindAdjustIncrement */
/*@::FixAndPrintObject()@*****************************************************/
/* */
/* FixAndPrintObject(x, xmk, xb, xf, dim, suppress, pg, count) */
/* */
/* Fix the absolute position of object x in dimension dim, in such a way */
/* that the principal mark of x has coordinate xmk, and x has actual size */
/* (xb, xf), where xb >= back(x, dim) and xf >= fwd(x, dim). */
/* */
/* Actually, in the case where x includes an object lying on a thread */
/* leading outside x, the final size of x may be different. Because */
/* of this, the procedure sets back(x, dim) and fwd(x, dim) to the actual */
/* size of x upon return. The caller assumes that x will exactly occupy */
/* this space back(x, dim), fwd(x, dim). */
/* */
/* The suppress parameter is true if a temporary suppression of adjustment */
/* in this direction is in effect (because a neighbouring adjustment has */
/* already been done). This is for @HAdjust and @VAdjust, not @PAdjust. */
/* */
/* If dim == COLM, the coordinate information is merely stored; but if */
/* dim == ROWM, it is used to generate PostScript for printing x. */
/* */
/* Parameter pg records the height of the current page. This is used */
/* to correct for the fact that Lout places its origin at the top left, */
/* while PostScript places its origin at the bottom left. This correction */
/* cannot be made by transforming user space. */
/* */
/* x is child number count of its parent (used by COL_THR and ROW_THR only) */
/* */
/*****************************************************************************/
void FixAndPrintObject(OBJECT x, FULL_LENGTH xmk, FULL_LENGTH xb,
FULL_LENGTH xf, int dim, BOOLEAN suppress, FULL_LENGTH pg, int count)
{ OBJECT y, link, prev, g, uplink, z, face, thr;
FULL_LENGTH mk, ymk, frame_size, back_edge, yb, yf, inc, f;
int i; float scale_factor; BOOLEAN jn;
debug8(DGP, DD, "[ FixAndPrintObject(%s %s, %s, %s,%s, %s, %s, pg, %d)",
Image(type(x)),
((type(x) == WORD || type(x) == QWORD) ? string(x) : STR_EMPTY),
EchoLength(xmk), EchoLength(xb), EchoLength(xf),dimen(dim),
(suppress == SUPPRESS ? "suppress" : "no_suppress"), count);
debug2(DGP, DD, " size(x) = %s,%s; x =",
EchoLength(back(x, dim)), EchoLength(fwd(x, dim)));
ifdebug(DGP, DD, DebugObject(x));
/*** start and stop debugging
if( dim == COLM && is_word(type(x)) &&
StringEqual(string(x), AsciiToFull("STARTBUG")) )
dbg[DGP].on[DD] = dbg[DGP].on[D] = TRUE;
if( dim == COLM && is_word(type(x)) &&
StringEqual(string(x), AsciiToFull("STOPBUG")) )
dbg[DGP].on[DD] = dbg[DGP].on[D] = FALSE;
*** */
switch( type(x) )
{
case CLOSURE:
case NULL_CLOS:
case PAGE_LABEL:
case CROSS:
case FORCE_CROSS:
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case START_HVSPAN:
case START_HSPAN:
case START_VSPAN:
CountChild(y, DownDim(x, dim), count);
if( type(y) == HSPANNER || type(y) == VSPANNER )
{
Child(z, Down(y));
Parent(thr, UpDim(x, dim));
save_mark(y) = xmk - back(thr, dim) + back(z, dim);
/* do the fix now if the first column is also the last one */
if( ++spanner_fixed(y) == spanner_count(y) )
{
debug6(DGP, DD, " f+last SPAN: yf = max(%s + %s - %s, %s, %s - %s)",
EchoLength(xmk), EchoLength(xf), EchoLength(save_mark(y)),
EchoLength(fwd(z, dim)),
EchoLength(bfc(constraint(y))), EchoLength(back(z, dim)));
yf = find_max(xmk + xf - save_mark(y), fwd(z, dim));
yf = find_max(yf, bfc(constraint(y)) - back(z, dim));
FixAndPrintObject(z, save_mark(y), back(z, dim), yf, dim,FALSE,pg,1);
}
}
else
{
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = back(y, dim); fwd(x, dim) = fwd(y, dim);
}
break;
case HSPAN:
case VSPAN:
/* do the fix on the last one */
CountChild(y, DownDim(x, dim), count);
if( type(y) == HSPANNER || type(y) == VSPANNER )
{
if( ++spanner_fixed(y) == spanner_count(y) )
{
Child(z, Down(y));
debug6(DGP, DD, " last SPAN: yf = max(%s + %s - %s, %s, %s - %s)",
EchoLength(xmk), EchoLength(xf), EchoLength(save_mark(y)),
EchoLength(fwd(z, dim)),
EchoLength(bfc(constraint(y))), EchoLength(back(z, dim)));
yf = find_max(xmk + xf - save_mark(y), fwd(z, dim));
yf = find_max(yf, bfc(constraint(y)) - back(z, dim));
FixAndPrintObject(z, save_mark(y), back(z, dim), yf, dim,FALSE,pg,1);
}
}
break;
case WORD:
case QWORD:
if( dim == COLM )
{
/* save horizontal position for PrintWord below */
word_save_mark(x) = xmk;
/* if first occurrence of this font on this page, notify font */
if( string(x)[0] != '\0' )
{ face = finfo[word_font(x)].original_face;
if( font_page(face) < font_curr_page )
{ debug3(DFT, DD, "FAPO: x = %s, word_font = %d, face = %s",
string(x), word_font(x), EchoObject(face));
FontPageUsed(face);
}
}
}
else
{
debug4(DGP, D, /* underline(x) == UNDER_UNDEF, */
" FAPO %s %s %s (underline = %s)", EchoFilePos(&fpos(x)),
Image(type(x)),
string(x), underline(x) == UNDER_OFF ? "UNDER_OFF" :
underline(x) == UNDER_ON ? "UNDER_ON" : "UNDER_UNDEF");
assert( underline(x) == UNDER_OFF || underline(x) == UNDER_ON,
"FixAndPrintObject: underline(x)!" );
if( string(x)[0] != '\0' )
{ BackEnd->PrintWord(x, word_save_mark(x), pg - xmk);
if( underline(x) == UNDER_ON )
{
FontWordSize(x); /* to restore fwd(x, COLM) */
BackEnd->PrintUnderline(word_font(x), word_save_mark(x),
word_save_mark(x) + fwd(x, COLM), pg - xmk);
}
}
}
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case WIDE:
case HIGH:
CountChild(y, Down(x), count);
if( (dim == COLM) == (type(x) == WIDE) )
{ yf = bfc(constraint(x)) - back(y, dim);
FixAndPrintObject(y, xmk, back(y,dim), yf, dim, NO_SUPPRESS, pg,count);
back(x, dim) = xb; fwd(x, dim) = xf;
}
else
{ FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = back(y, dim); fwd(x, dim) = fwd(y, dim);
}
break;
case HSHIFT:
case VSHIFT:
CountChild(y, Down(x), count);
if( (dim == COLM) == (type(x) == HSHIFT) )
{
/* work out the size of the shift depending on the units */
f = FindShift(x, y, dim);
ymk = xmk - f;
yb = find_max(0, xb - f);
yf = find_max(0, xf + f);
FixAndPrintObject(y, ymk, yb, yf, dim, suppress, pg, count);
/* recalculate the size of x as in MinSize */
f = FindShift(x, y, dim);
back(x, dim) = find_min(MAX_FULL_LENGTH, find_max(0, back(y, dim) + f));
fwd(x, dim) = find_min(MAX_FULL_LENGTH, find_max(0, fwd(y, dim) - f));
}
else
{ FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = back(y, dim); fwd(x, dim) = fwd(y, dim);
}
break;
case HCONTRACT:
case VCONTRACT:
CountChild(y, Down(x), count);
if( (dim == COLM) == (type(x) == HCONTRACT) )
{ FixAndPrintObject(y, xmk, back(y,dim), fwd(y,dim), dim,
NO_SUPPRESS, pg, count);
back(x, dim) = xb; fwd(x, dim) = xf;
}
else
{ FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = back(y, dim); fwd(x, dim) = fwd(y, dim);
}
break;
case ONE_COL:
case ONE_ROW:
case HLIMITED:
case VLIMITED:
case HEXPAND:
case VEXPAND:
CountChild(y, Down(x), count);
if( (dim == COLM) == (type(x) == ONE_COL || type(x) == HEXPAND) )
{ FixAndPrintObject(y, xmk, xb, xf, dim, NO_SUPPRESS, pg, count);
back(x, dim) = xb; fwd(x, dim) = xf;
}
else
{ FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = back(y, dim); fwd(x, dim) = fwd(y, dim);
}
break;
case VSCALE:
debug0(DRS, DD, "FixAndPrintObject at VSCALE");
CountChild(y, Down(x), count);
if( BackEnd->scale_avail )
{
if( dim == COLM )
FixAndPrintObject(y, xmk, xb, xf, dim, NO_SUPPRESS, pg, count);
else if( (scale_factor = ScaleFactor(xb+xf, size(y, ROWM))) > 0 )
{ BackEnd->SaveGraphicState(y);
BackEnd->CoordTranslate(0,
pg - (xmk - xb + (FULL_LENGTH) (back(y, ROWM) * scale_factor)));
BackEnd->CoordScale(1.0, scale_factor);
FixAndPrintObject(y, 0, back(y,ROWM), fwd(y,ROWM), dim,
NO_SUPPRESS, 0, count);
BackEnd->RestoreGraphicState();
}
else if( !is_word(type(y)) || string(y)[0] != '\0' )
Error(23, 1, "object deleted (it cannot be scaled vertically)",
WARN, &fpos(x));
}
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case HSCALE:
debug0(DRS, DD, "FixAndPrintObject at HSCALE");
CountChild(y, Down(x), count);
if( BackEnd->scale_avail )
{ if( dim == COLM )
{ save_mark(x) = xmk;
bc(constraint(x)) = xb;
fc(constraint(x)) = xf;
if( (scale_factor = ScaleFactor(xb+xf, size(y, COLM))) > 0 )
FixAndPrintObject(y, 0, back(y, COLM), fwd(y, COLM), dim,
NO_SUPPRESS, pg, count);
else if( !is_word(type(y)) || string(y)[0] != '\0' )
Error(23, 2, "object deleted (it cannot be scaled horizontally)",
WARN, &fpos(y));
}
else if( (scale_factor =
ScaleFactor(bc(constraint(x))+fc(constraint(x)),size(y,COLM))) > 0 )
{ BackEnd->SaveGraphicState(y);
BackEnd->CoordTranslate(save_mark(x) - bc(constraint(x))
+ (FULL_LENGTH) (back(y, COLM)*scale_factor), 0);
BackEnd->CoordScale(scale_factor, 1.0);
FixAndPrintObject(y, xmk, xb, xf, dim, NO_SUPPRESS, pg, count);
BackEnd->RestoreGraphicState();
}
}
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case SCALE:
CountChild(y, Down(x), count);
if( BackEnd->scale_avail )
{
if( dim == COLM )
{ assert( bc(constraint(x)) > 0, "FAPO: horizontal scale factor!" );
save_mark(x) = xmk;
yb = xb * SF / bc(constraint(x));
yf = xf * SF / bc(constraint(x));
FixAndPrintObject(y, 0, yb, yf, dim, NO_SUPPRESS, pg, count);
}
else
{ assert( fc(constraint(x)) > 0, "FAPO: vertical scale factor!" );
yb = xb * SF / fc(constraint(x));
yf = xf * SF / fc(constraint(x));
BackEnd->SaveGraphicState(y);
BackEnd->CoordTranslate(save_mark(x), pg - xmk);
BackEnd->CoordScale( (float)bc(constraint(x))/SF,
(float)fc(constraint(x))/SF);
FixAndPrintObject(y, 0, yb, yf, dim, NO_SUPPRESS, 0, count);
BackEnd->RestoreGraphicState();
}
}
else if( bc(constraint(x)) == SF && fc(constraint(x)) == SF )
{
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
}
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case KERN_SHRINK:
CountChild(y, LastDown(x), count);
if( dim == COLM )
{ FixAndPrintObject(y, xmk, back(y,dim), fwd(y,dim), dim,
NO_SUPPRESS, pg, count);
}
else
{ FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = back(y, dim); fwd(x, dim) = fwd(y, dim);
}
break;
case BACKGROUND:
/* this object has the size of its second child; but its first */
/* child gets printed too, in the same space */
CountChild(y, Down(x), count);
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
CountChild(y, LastDown(x), count);
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
break;
case ROTATE:
CountChild(y, Down(x), count);
if( BackEnd->rotate_avail )
{
if( dim == COLM )
{ CONSTRAINT colc, rowc, yc;
save_mark(x) = xmk;
SetConstraint(colc, back(x,COLM), MAX_FULL_LENGTH, fwd(x,COLM));
SetConstraint(rowc, back(x,ROWM), MAX_FULL_LENGTH, fwd(x,ROWM));
RotateConstraint(&yc, y, sparec(constraint(x)), &colc, &rowc,COLM);
FixAndPrintObject(y, 0, bc(yc), fc(yc), COLM,NO_SUPPRESS,pg,count);
}
else
{ CONSTRAINT colc, rowc, yc;
BackEnd->SaveGraphicState(y);
BackEnd->CoordTranslate(save_mark(x), pg - xmk);
BackEnd->CoordRotate(sparec(constraint(x)));
SetConstraint(colc, back(x,COLM), MAX_FULL_LENGTH, fwd(x,COLM));
SetConstraint(rowc, back(x,ROWM), MAX_FULL_LENGTH, fwd(x,ROWM));
RotateConstraint(&yc, y, sparec(constraint(x)), &colc, &rowc, ROWM);
FixAndPrintObject(y, 0, bc(yc), fc(yc), ROWM, NO_SUPPRESS,0,count);
BackEnd->RestoreGraphicState();
}
}
else if( sparec(constraint(x)) == 0 )
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case PLAIN_GRAPHIC:
CountChild(y, LastDown(x), count);
if( BackEnd->plaingraphic_avail )
{
if( dim == COLM )
{
back(x, dim) = xb;
fwd(x, dim) = xf;
save_mark(x) = xmk - back(x, dim);
debug2(DGP, DD, "PLAIN_GRAPHIC COLM storing size %s, %s",
EchoLength(back(x, dim)), EchoLength(fwd(x, dim)));
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
}
else
{ OBJECT tmp, pre, post;
Child(tmp, Down(x));
if( type(tmp) == VCAT )
{ Child(pre, Down(tmp));
Child(post, LastDown(tmp));
}
else pre = tmp, post = nilobj;
back(x, dim) = xb;
fwd(x, dim) = xf;
BackEnd->PrintPlainGraphic(pre, save_mark(x),
pg - (xmk - back(x, dim)), x);
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
if( post != nilobj )
BackEnd->PrintPlainGraphic(post, save_mark(x),
pg - (xmk - back(x, dim)), x);
}
}
else
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case GRAPHIC:
CountChild(y, LastDown(x), count);
if( BackEnd->graphic_avail )
{
if( dim == COLM )
{
/* if first occurrence of this font on this page, notify font */
if( font(save_style(x)) > 0 )
{ face = finfo[font(save_style(x))].original_face;
if( font_page(face) < font_curr_page ) FontPageUsed(face);
}
back(x, dim) = xb;
fwd(x, dim) = xf;
debug2(DGP, DD, "GRAPHIC COLM storing size %s, %s",
EchoLength(back(x, dim)), EchoLength(fwd(x, dim)));
save_mark(x) = xmk - back(x, COLM);
FixAndPrintObject(y, xb, xb, xf, dim, NO_SUPPRESS, pg, count);
}
else
{ OBJECT tmp, pre, post;
Child(tmp, Down(x));
if( type(tmp) == VCAT )
{ Child(pre, Down(tmp));
Child(post, LastDown(tmp));
}
else pre = tmp, post = nilobj;
back(x, dim) = xb;
fwd(x, dim) = xf;
BackEnd->SaveTranslateDefineSave(x, save_mark(x),
pg - (xmk + fwd(x, ROWM)));
BackEnd->PrintGraphicObject(pre);
BackEnd->RestoreGraphicState();
FixAndPrintObject(y, xb, xb, xf, dim, NO_SUPPRESS, xb + xf, count);
if( post != nilobj ) BackEnd->PrintGraphicObject(post);
BackEnd->RestoreGraphicState();
}
}
else
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case INCGRAPHIC:
case SINCGRAPHIC:
CountChild(y, Down(x), count);
if( BackEnd->incgraphic_avail )
{
if( dim == COLM )
{ save_mark(x) = xmk;
if( incgraphic_ok(x) )
{ debug2(DGP, DD, " %s (style %s)",
EchoObject(x), EchoStyle(&save_style(x)));
face = finfo[font(save_style(x))].original_face;
if( font_page(face) < font_curr_page )
{ debug3(DFT, DD, "FAPO-IG: x = %s, font = %d, face = %s",
string(x), font(save_style(x)), EchoObject(face));
FontPageUsed(face);
}
}
}
else if( incgraphic_ok(x) )
BackEnd->PrintGraphicInclude(x, save_mark(x), pg - xmk);
}
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case SPLIT:
link = DownDim(x, dim); CountChild(y, link, count);
FixAndPrintObject(y, xmk, xb, xf, dim, suppress, pg, count);
back(x, dim) = back(y, dim); fwd(x, dim) = fwd(y, dim);
break;
case VCAT:
case HCAT:
if( (type(x) == VCAT) == (dim == ROWM) )
{
debug6(DGP, DD, "[ FAPO-CAT %s (%s,%s): xmk %s, xb %s, xf %s",
Image(type(x)), EchoLength(back(x, dim)), EchoLength(fwd(x, dim)),
EchoLength(xmk), EchoLength(xb), EchoLength(xf));
FirstDefinite(x, link, prev, jn);
if( link != x )
{
/* handle the special case of a 0rt gap at the beginning (left */
/* justify) by converting it to 0ie but increasing fwd(prev) */
/* to the max. possible */
NextDefiniteWithGap(x, link, y, g, jn);
if( link != x && mode(gap(g)) == TAB_MODE &&
units(gap(g)) == AVAIL_UNIT && width(gap(g)) == 0 )
{
debug2(DGP, DD, " FAPO-CAT converting 0rt (back(x, dim) %s, xb %s)",
EchoLength(back(x, dim)), EchoLength(xb));
fwd(prev, dim) += xb - back(x, dim);
back(x, dim) = xb;
mode(gap(g)) = EDGE_MODE;
units(gap(g)) = FIXED_UNIT;
}
FirstDefinite(x, link, prev, jn);
/* the frame size is the total width actually available */
frame_size = back(x, dim) + xf;
/* back_edge is where the first element begins */
back_edge = xmk - back(x, dim);
/* inc is the adjust increment, used when adjusting gaps */
if( adjust_cat(x) && !suppress )
inc = FindAdjustIncrement(x, frame_size, dim);
else inc = 0;
mk = back_edge + back(prev, dim);
debug4(DGP, DD, " FAPO-CAT back_edge %s, mk %s, framesize %s, inc %s",
EchoLength(back_edge), EchoLength(mk), EchoLength(frame_size),
EchoLength(inc));
NextDefiniteWithGap(x, link, y, g, jn);
while( link != x )
{
if( mode(gap(g)) == TAB_MODE && units(gap(g)) == AVAIL_UNIT &&
width(gap(g))==FR )
{
/* object is followed by 1rt gap, give it full space to print */
debug5(DGP,D," FAPO (a) calling FAPO(%s, %s, %s, max(%s, %s))",
Image(type(prev)), EchoLength(mk), EchoLength(back(prev, dim)),
EchoLength(fwd(prev, dim)), EchoLength(xmk+xf-mk-size(y,dim)));
FixAndPrintObject(prev, mk, back(prev, dim),
find_max(fwd(prev, dim), xmk+xf-mk - size(y, dim)),
dim, NO_SUPPRESS, pg, count);
}
else
{
debug5(DGP, DD, " FAPO-CAT (b) calling FAPO(%s, %s, %s, %s+%s)",
Image(type(prev)), EchoLength(mk), EchoLength(back(prev, dim)),
EchoLength(fwd(prev, dim)), EchoLength(inc));
FixAndPrintObject(prev, mk, back(prev, dim), fwd(prev, dim) + inc,
dim, NO_SUPPRESS, pg, count);
}
/* NB fwd(prev, dim) may be changed by the call to FAPO */
mk += ActualGap(fwd(prev, dim), back(y, dim), fwd(y, dim), &gap(g),
frame_size, mk - back_edge);
prev = y;
NextDefiniteWithGap(x, link, y, g, jn);
}
if( suppress )
{
debug4(DGP, DD, " FAPO-CAT (c) calling FAPO(%s, %s, %s, %s)",
Image(type(prev)), EchoLength(mk), EchoLength(back(prev, dim)),
EchoLength(fwd(prev, dim)));
FixAndPrintObject(prev, mk, back(prev, dim), fwd(prev, dim),
dim, NO_SUPPRESS, pg, count);
}
else
{
debug5(DGP, DD," FAPO-CAT (d) calling FAPO(%s, %s, %s, max(%s, %s))",
Image(type(prev)), EchoLength(mk), EchoLength(back(prev, dim)),
EchoLength(fwd(prev, dim)), EchoLength(xmk + xf - mk));
FixAndPrintObject(prev, mk, back(prev,dim),
find_max(fwd(prev, dim), xmk + xf - mk),
dim, NO_SUPPRESS, pg, count);
}
back(x, dim) = find_max(back(x, dim), xb);
fwd(x, dim) = mk + fwd(prev, dim) - back_edge - back(x, dim);
}
else back(x, dim) = xb, fwd(x, dim) = xf;
debug0(DGP, DD, "] FAPO-CAT returning.");
}
else
{ OBJECT start_group, zlink, m; BOOLEAN dble_found;
FULL_LENGTH b, f, dlen;
start_group = nilobj; dble_found = FALSE; dlen = 0;
debug0(DGP, DD, " groups beginning.");
FirstDefinite(x, link, y, jn);
if( link != x )
{
/* start first group, with or without join */
b = back(y, dim);
f = fwd(y, dim);
m = y;
start_group = link;
dble_found = !jn;
debug4(DGP, DD, " starting first group %s (%sdbl_found): b = %s, f = %s",
Image(type(y)), dble_found ? "" : "not ",
EchoLength(b), EchoLength(f));
NextDefiniteWithGap(x, link, y, g, jn);
while( link != x )
{
if( !jn )
{
/* finish off and fix the group ending just before g */
debug2(DGP, DD, " finishing group: b = %s, f = %s",
EchoLength(b), EchoLength(f));
FixAndPrintObject(m, xmk+b, b, xf-b, dim,
NO_SUPPRESS, pg, count);
b = back(m, dim); f = fwd(m, dim);
for( zlink = start_group; zlink != link; zlink=NextDown(zlink) )
{ CountChild(z, zlink, count);
if( !is_definite(type(z)) || z == m ) continue;
FixAndPrintObject(z, xmk + b, b, xf - b, dim,
SUPPRESS, pg, count);
b = find_max(b, back(z, dim)); f = find_max(f, fwd(z, dim));
}
dlen = find_max(dlen, b + f);
dble_found = TRUE;
start_group = nilobj;
/* start new group */
b = back(y, dim);
f = fwd(y, dim);
m = y;
start_group = link;
debug2(DGP, DD, " starting group: b = %s, f = %s",
EchoLength(b), EchoLength(f));
}
else
{
/* continue with current group */
b = find_max(b, back(y, dim));
f = find_max(f, fwd(y, dim));
if( fwd(y, dim) > fwd(m, dim) ) m = y;
debug2(DGP, DD, " continuing group: b = %s, f = %s",
EchoLength(b), EchoLength(f));
}
NextDefiniteWithGap(x, link, y, g, jn);
}
assert( start_group != nilobj, "FAPO: final start_group!" );
if( dble_found || !jn )
{
/* finish off and fix this last group */
debug2(DGP, DD, " finishing last group: b = %s, f = %s",
EchoLength(b), EchoLength(f));
FixAndPrintObject(m, xmk+b, b, xf - b, dim, NO_SUPPRESS, pg,count);
b = back(m, dim); f = fwd(m, dim);
for( zlink = start_group; zlink != x; zlink = NextDown(zlink) )
{ CountChild(z, zlink, count);
if( !is_definite(type(z)) || z == m ) continue;
FixAndPrintObject(z, xmk+b, b, xf - b, dim, SUPPRESS, pg, count);
b = find_max(b, back(z, dim)); f = find_max(f, fwd(z, dim));
}
dlen = find_max(dlen, b + f);
back(x, dim) = 0; fwd(x, dim) = dlen;
}
else
{
/* finish off and fix this last and only group */
debug2(DGP, DD, " finishing last and only group: b = %s, f = %s",
EchoLength(b), EchoLength(f));
FixAndPrintObject(m, xmk, xb, xf, dim, NO_SUPPRESS, pg, count);
b = back(m, dim); f = fwd(m, dim);
for( zlink = start_group; zlink != x; zlink = NextDown(zlink) )
{ CountChild(z, zlink, count);
if( !is_definite(type(z)) || z == m ) continue;
FixAndPrintObject(z, xmk, xb, xf, dim, SUPPRESS, pg, count);
b = find_max(b, back(z, dim)); f = find_max(f, fwd(z, dim));
}
back(x, dim) = b; fwd(x, dim) = f;
}
}
}
break;
case ACAT:
if( dim == COLM )
{ BOOLEAN will_adjust, adjusting;
FULL_LENGTH actual_size,
adjust_indent, frame_size, back_edge, adjust_inc, inc, adjust_sofar;
int adjustable_gaps, gaps_sofar;
BOOLEAN underlining; int underline_xstart; FONT_NUM underline_font;
OBJECT urec, last_bad_gap;
/*********************************************************************/
/* */
/* The first step is to calculate the following values: */
/* */
/* last_bad_gap The rightmost tab gap, or nilobj if none; */
/* */
/* adjustable_gaps the number of gaps suitable for adjustment; */
/* i.e. to the right of the right-most tab gap, */
/* and of non-zero width; */
/* */
/* actual_size the actual size of x without adjustment. */
/* */
/* These are needed when adjusting the line. */
/* */
/*********************************************************************/
FirstDefinite(x, link, y, jn);
if( link == x ) break; /* no definite children, nothing to print */
/*** nasty bug finder
{ OBJECT ff = y;
debugcond1(DGP, DD, word_equal(ff, "@ReportLayout"),
"FAPO(%s, COLM)", EchoObject(x));
debugcond1(DGP, DD, word_equal(ff, "@ReportLayout"),
" adjust_cat(x) = %s", bool(adjust_cat(x)));
}
***/
last_bad_gap = nilobj;
adjustable_gaps = 0;
back_edge = xmk - xb;
mk = back_edge + back(y, dim);
frame_size = xb + xf;
prev = y;
NextDefiniteWithGap(x, link, y, g, jn);
while( link != x )
{
save_actual_gap(g) = ActualGap(fwd(prev, dim), back(y, dim),
fwd(y, dim), &gap(g), frame_size, mk - back_edge);
mk += save_actual_gap(g);
if( mode(gap(g)) == TAB_MODE || units(gap(g)) == AVAIL_UNIT
|| units(gap(g)) == FRAME_UNIT )
{ last_bad_gap = g;
adjustable_gaps = 0;
}
else if( width(gap(g)) > 0 ) adjustable_gaps++;
prev = y;
NextDefiniteWithGap(x, link, y, g, jn);
}
actual_size = mk + fwd(prev, dim) - back_edge;
/*********************************************************************/
/* */
/* It is possible that the line cannot be displayed in any */
/* reasonable way, because the paragraph breaker was forced to */
/* produce an overfull line. In this case, actual_size will */
/* exceed frame_size and there will be no adjustable gaps. The */
/* solution is to horizontally scale the line if possible, or */
/* else to not print it at all. */
/* */
/*********************************************************************/
if( actual_size > frame_size && adjustable_gaps == 0 )
{
/* can't be fixed by adjustment, so scale the line or delete it */
CONSTRAINT c;
SetConstraint(c, 0, frame_size, frame_size);
fwd(x, dim) = actual_size;
debug2(DGP, DD, " oversize, actual_size = %s, frame_size = %s",
EchoLength(actual_size), EchoLength(frame_size));
if( BackEnd->scale_avail && InsertScale(x, &c) )
{
/* the problem has just been fixed, by inserting a @Scale above x */
OBJECT prnt;
Parent(prnt, Up(x));
Child(y, Down(x));
if( actual_size - frame_size < 1 * PT )
{
/* the correction is probably due to roundoff error, and */
/* anyway is too small to print an error message about */
}
else if( Down(x) == LastDown(x) && is_word(type(y)) )
{
Error(23, 3, "word %s horizontally scaled by factor %.2f (too wide for %s paragraph)",
WARN, &fpos(y), string(y), (float) bc(constraint(prnt)) / SF,
EchoLength(frame_size));
}
else
{
Error(23, 4, "%s object horizontally scaled by factor %.2f (too wide for %s paragraph)",
WARN, &fpos(x), EchoLength(size(x, COLM)),
(float) bc(constraint(prnt)) / SF, EchoLength(frame_size));
}
FixAndPrintObject(prnt, xmk, back(prnt, dim), fwd(prnt, dim), dim,
NO_SUPPRESS, pg, count);
}
else
{
/* fix the problem by refraining from printing the line */
if( size(x, COLM) <= 0 )
Error(23, 5, "oversize object has size 0 or less", INTERN, &fpos(x));
Child(y, Down(x));
if( Down(x) == LastDown(x) && is_word(type(y)) )
{ Error(23, 6, "word %s deleted (too wide for %s paragraph)",
WARN, &fpos(y), string(y), EchoLength(frame_size));
}
else
{ Error(23, 7, "%s object deleted (too wide for %s paragraph)",
WARN, &fpos(x), EchoLength(size(x, COLM)), EchoLength(frame_size));
}
/* delete and dispose every child of x */
while( Down(x) != x )
DisposeChild(Down(x));
y = MakeWord(WORD, STR_EMPTY, &fpos(x));
Link(x, y);
back(y, COLM) = fwd(y, COLM) = 0;
back(y, ROWM) = fwd(y, ROWM) = 0;
}
}
else
{
/*********************************************************************/
/* */
/* The line may be displayed in one of four ways: centred, right- */
/* justified, adjusted, or none of the above (i.e. left justified). */
/* An overfull line is always adjusted; otherwise, the line will */
/* be centred or right justified if the display style asks for it; */
/* otherwise, the line will be adjusted if adjust_cat(x) == TRUE */
/* (i.e. there is an enclosing @PAdjust) or if the display style is */
/* DO_ADJUST (meaning that this line is one of a paragraph set in */
/* the adjust or outdent break style, other than the last line); */
/* otherwise, the line is left justified. */
/* */
/* The second step is to decide which of these four cases holds */
/* for this line, and to record the decision in these variables: */
/* */
/* will_adjust TRUE if the adjusted style applies; in this */
/* case, variables adjust_inc and inc will be */
/* set to the appropriate adjustment value; */
/* */
/* adjust_indent If centring or right justification applies, */
/* the indent to produce this, else zero. */
/* */
/* NB adjust_inc may be negative, if the optimal paragraph breaker */
/* has chosen to shrink some gaps. */
/* */
/*********************************************************************/
if( actual_size > frame_size )
{
assert( adjustable_gaps > 0, "FAPO: adjustable_gaps!" );
adjust_cat(x) = TRUE;
adjust_indent = 0;
}
else switch( display_style(save_style(x)) )
{
case DO_ADJUST: adjust_cat(x) = TRUE;
adjust_indent = 0;
debug1(DSF, D, "adjust %s", EchoObject(x));
break;
case DISPLAY_CENTRE: adjust_cat(x) = FALSE;
adjust_indent = (frame_size - actual_size)/2;
debug1(DGP, DD, "cdisp %s", EchoObject(x));
break;
case DISPLAY_RIGHT: adjust_cat(x) = FALSE;
adjust_indent = frame_size - actual_size;
debug1(DGP, DD, "rdisp %s", EchoObject(x));
debug1(DSF, D, "rdisp %s", EchoObject(x));
break;
default: /* leave adjust_cat(x) as is */
adjust_indent = 0;
break;
}
debug2(DGP, DD, "ACAT %s %s",
EchoStyle(&save_style(x)), EchoObject(x));
debug2(DGP, DD, "frame_size = %s, actual_size = %s",
EchoLength(frame_size), EchoLength(actual_size));
if( adjust_cat(x) && adjustable_gaps > 0 )
{ will_adjust = TRUE;
adjust_inc = (frame_size - actual_size) / adjustable_gaps;
inc = find_max(adjust_inc, 0);
gaps_sofar = 0; /* number of gaps adjusted so far */
adjust_sofar = 0; /* total width of adjustments so far */
debug2(DGP, DD, "will_adjust: adjustable_gaps = %d, adjust_inc = %s",
adjustable_gaps, EchoLength(adjust_inc));
}
else will_adjust = FALSE;
/*********************************************************************/
/* */
/* The third and final step is to traverse x, fixing subobjects. */
/* Variable adjusting is true while adjusting is occurring. */
/* */
/*********************************************************************/
underlining = FALSE;
adjusting = will_adjust && last_bad_gap == nilobj;
FirstDefinite(x, link, y, jn);
prev = y;
mk = xmk - back(x, dim) + back(y, dim) + adjust_indent;
NextDefiniteWithGap(x, link, y, g, jn);
while( link != x )
{
/* check for underlining */
if( underline(prev) == UNDER_ON )
{
debug3(DGP, DD, " FAPO/ACAT1 underline() := %s for %s %s",
bool(FALSE), Image(type(prev)), EchoObject(prev));
underline(prev) = UNDER_OFF;
if( !underlining )
{
/* underlining begins here */
underlining = TRUE;
debug2(DGP, DD, "underlining begins at %s %s",
Image(type(prev)), EchoObject(prev));
underline_font = is_word(type(prev)) ? word_font(prev) :
font(save_style(x));
underline_xstart = mk - back(prev, dim);
}
if( underline(g) == UNDER_OFF )
{
/* underlining ends here */
debug2(DGP, DD, "underlining ends at %s %s",
Image(type(prev)), EchoObject(prev));
New(urec, UNDER_REC);
back(urec, COLM) = underline_xstart;
fwd(urec, COLM) = mk + fwd(prev, dim);
back(urec, ROWM) = underline_font;
underlining = FALSE;
Link(Up(prev), urec);
}
}
/* fix previous definite now we know it is not the last one */
if( adjusting && width(gap(g)) > 0 )
{ int tmp;
FixAndPrintObject(prev, mk, back(prev, dim), fwd(prev, dim) + inc,
dim, NO_SUPPRESS, pg, count);
gaps_sofar++;
tmp = ((frame_size - actual_size) * gaps_sofar) / adjustable_gaps;
mk += save_actual_gap(g) + (tmp - adjust_sofar);
adjust_sofar = tmp;
}
else
{
FixAndPrintObject(prev, mk, back(prev, dim), fwd(prev, dim),
dim, NO_SUPPRESS, pg, count);
mk += save_actual_gap(g);
}
prev = y;
/* commence adjustment if required */
if( !adjusting && will_adjust && g == last_bad_gap )
adjusting = TRUE;
NextDefiniteWithGap(x, link, y, g, jn);
}
/* check for underlining */
debugcond3(DGP, D, underline(prev) == UNDER_UNDEF,
" underlining is UNDER_UNDEF in %s: %s %s in para:",
EchoFilePos(&fpos(prev)), Image(type(prev)), EchoObject(prev));
debugcond1(DGP, D, underline(prev)==UNDER_UNDEF, "%s", EchoObject(x));
assert( underline(prev) == UNDER_OFF || underline(prev) == UNDER_ON,
"FixAndPrint: underline(prev)!" );
if( underline(prev) == UNDER_ON )
{
debug3(DGP, DD, " FAPO/ACAT1 underline() := %s for %s %s",
bool(FALSE), Image(type(prev)), EchoObject(prev));
underline(prev) = UNDER_OFF;
if( !underlining )
{
/* underlining begins here */
debug2(DGP, DD, "underlining begins at %s %s",
Image(type(prev)), EchoObject(prev));
underlining = TRUE;
underline_font = is_word(type(prev)) ? word_font(prev) :
font(save_style(x));
underline_xstart = mk - back(prev, dim);
}
/* underlining must end here */
debug2(DGP, DD, "underlining ends at %s %s",
Image(type(prev)), EchoObject(prev));
New(urec, UNDER_REC);
back(urec, COLM) = underline_xstart;
fwd(urec, COLM) = mk + fwd(prev, dim);
back(urec, ROWM) = underline_font;
underlining = FALSE;
Link(Up(prev), urec);
}
/* fix the last definite subobject, prev, which must exist */
FixAndPrintObject(prev, mk, back(prev, dim),
frame_size - (mk - xmk) - back(x, dim),
dim, NO_SUPPRESS, pg, count);
}
}
else for( link = Down(x); link != x; link = NextDown(link) )
{ Child(y, link);
if( !is_definite(type(y)) )
{
if( type(y) == UNDER_REC ) /* generate an underline now */
BackEnd->PrintUnderline(back(y, ROWM), back(y, COLM),
fwd(y, COLM), pg - xmk);
continue;
}
FixAndPrintObject(y, xmk, xb, xf, dim, NO_SUPPRESS, pg, count);
}
back(x, dim) = xb; fwd(x, dim) = xf;
break;
case COL_THR:
case ROW_THR:
/* find and delete the child number count of y */
assert( (type(x) == COL_THR) == (dim == COLM), "FixAndPrintObject: thr!" );
for( link = Down(x), uplink = Up(x), i = 1;
link != x && uplink != x && i < count;
link = NextDown(link), uplink = NextUp(uplink), i++ );
assert( link != x && uplink != x, "FixAndPrintObject: link or uplink!" );
CountChild(y, link, count);
debug7(DGP, DD, " fapo of %s (%s,%s) child %d %s (%s,%s)",
Image(type(x)),
EchoLength(back(x, dim)), EchoLength(fwd(x, dim)),
i, Image(type(y)), EchoLength(back(y, dim)), EchoLength(fwd(y, dim)));
MoveLink(uplink, link, CHILD); DeleteLink(link); /* IMPORTANT!!! */
assert( type(y) != GAP_OBJ, "FAPO: THR!");
/* assign size if not done previously */
/* ***
if( thr_state(x) != FINALSIZE && type(y) != START_HVSPAN &&
type(y) != START_HSPAN && type(y) != START_VSPAN &&
type(y) != HSPAN && type(y) != VSPAN )
*** */
if( thr_state(x) != FINALSIZE )
{ back(x, dim) = xb; fwd(x, dim) = xf;
thr_state(x) = FINALSIZE;
}
/* fix y */
FixAndPrintObject(y, xmk, back(x, dim), fwd(x, dim), dim,
NO_SUPPRESS, pg, count);
if( Up(x) == x ) Dispose(x);
break;
case BEGIN_HEADER:
case END_HEADER:
case SET_HEADER:
case CLEAR_HEADER:
if( dim == COLM )
Error(23, 8, "%s symbol ignored (out of place)", WARN, &fpos(x),
Image(type(x)));
break;
default:
assert1(FALSE, "FixAndPrintObject:", Image(type(x)));
break;
} /* end switch */
debug2(DGP, DD, "] FixAndPrintObject returning (size now %s,%s).",
EchoLength(back(x, dim)), EchoLength(fwd(x, dim)));
} /* end FixAndPrintObject */
