/*@z11.c:Style Service:EchoStyle()@*******************************************/
/* */
/* THE LOUT DOCUMENT FORMATTING SYSTEM (VERSION 3.18) */
/* 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: z11.c */
/* MODULE: Style Service */
/* EXTERNS: EchoStyle(), SpaceChange(), BreakChange() */
/* */
/*****************************************************************************/
#include "externs.h"
#if DEBUG_ON
/*****************************************************************************/
/* */
/* FULL_CHAR *EchoStyle(style) */
/* */
/* Returns a string showing the value of the style. */
/* */
/*****************************************************************************/
FULL_CHAR *EchoStyle(STYLE *style)
{ static FULL_CHAR res[100];
static char *hyphwords[] = { "hyph_undef", "hyph_off", "hyph_on" };
static char *fillwords[] = { "fill_undef", "fill_off", "fill_on" };
static char *spacewords[] = { "lout", "comp", "troff", "tex" };
static char *displaywords[] = { "undef", "adjust", "outdent", "left",
"centre", "right", "do" };
StringCopy(res, AsciiToFull("["));
StringCat(res, EchoCatOp(VCAT,mark(line_gap(*style)),join(line_gap(*style))));
StringCat(res, EchoGap(&line_gap(*style)));
StringCat(res, AsciiToFull(", "));
StringCat(res, font(*style) == 0 ?
AsciiToFull("nofont") : FontFamilyAndFace(font(*style)));
StringCat(res, AsciiToFull(" ("));
StringCat(res, AsciiToFull(spacewords[space_style(*style)]));
StringCat(res, AsciiToFull(" "));
StringCat(res, EchoGap(&space_gap(*style)));
StringCat(res, AsciiToFull("), "));
StringCat(res, AsciiToFull(hyph_style(*style) < 3 ?
hyphwords[hyph_style(*style)] : "?"));
StringCat(res, AsciiToFull(":"));
StringCat(res, AsciiToFull(fill_style(*style) < 3 ?
fillwords[fill_style(*style)] : "?"));
StringCat(res, AsciiToFull(":"));
StringCat(res, AsciiToFull(display_style(*style) < 7 ?
displaywords[display_style(*style)] : "?"));
if( small_caps(*style) > 0 ) StringCat(res, AsciiToFull(":smallcaps"));
if( vadjust(*style) ) StringCat(res, AsciiToFull(":vadjust"));
if( hadjust(*style) ) StringCat(res, AsciiToFull(":hadjust"));
if( padjust(*style) ) StringCat(res, AsciiToFull(":padjust"));
if( yunit(*style) != 0 )
{ StringCat(res, AsciiToFull(":y="));
StringCat(res, EchoLength(yunit(*style)));
}
if( zunit(*style) != 0 )
{ StringCat(res, AsciiToFull(":z="));
StringCat(res, EchoLength(zunit(*style)));
}
if( nobreakfirst(*style) ) StringCat(res, AsciiToFull(":NBF"));
if( nobreaklast(*style) ) StringCat(res, AsciiToFull(":NBL"));
StringCat(res, AsciiToFull("]"));
return res;
} /* end EchoStyle */
#endif
/*@::SpaceChange()@***********************************************************/
/* */
/* SpaceChange(style, x) */
/* */
/* Change the current break style as indicated by object x. */
/* */
/*****************************************************************************/
static void changespace(STYLE *style, OBJECT x)
{ GAP res_gap; unsigned gap_inc;
assert( is_word(type(x)), "changespace: type(x)!" );
if( beginsbreakstyle(string(x)[0]) )
{
/* should be a new space style option */
if( StringEqual(string(x), STR_SPACE_LOUT) )
space_style(*style) = SPACE_LOUT;
else if( StringEqual(string(x), STR_SPACE_COMPRESS) )
space_style(*style) = SPACE_COMPRESS;
else if( StringEqual(string(x), STR_SPACE_SEPARATE) )
space_style(*style) = SPACE_SEPARATE;
else if( StringEqual(string(x), STR_SPACE_TROFF) )
space_style(*style) = SPACE_TROFF;
else if( StringEqual(string(x), STR_SPACE_TEX) )
space_style(*style) = SPACE_TEX;
else Error(11, 1, "unknown option to %s symbol (%s)",
WARN, &fpos(x), KW_SPACE, string(x));
}
else /* should be a new space gap */
{ GetGap(x, style, &res_gap, &gap_inc);
if( gap_inc != GAP_ABS && units(res_gap) != units(space_gap(*style)) )
{ Error(11, 2, "spacing %s is not compatible with current spacing",
WARN, &fpos(x), string(x));
}
else
{ units(space_gap(*style)) = units(res_gap);
mode(space_gap(*style)) = mode(res_gap);
width(space_gap(*style)) = gap_inc == GAP_ABS ? width(res_gap) :
gap_inc == GAP_INC ? width(space_gap(*style)) + width(res_gap) :
find_max(width(space_gap(*style)) - width(res_gap), 0);
}
}
debug1(DSS, D, "SpaceChange returning %s", EchoStyle(style));
} /* end SpaceChange */
void SpaceChange(STYLE *style, OBJECT x)
{ OBJECT link, y;
debug2(DSS, D, "SpaceChange(%s, %s)", EchoStyle(style), EchoObject(x));
switch( type(x) )
{
case NULL_CLOS: break;
case WORD:
case QWORD: if( !StringEqual(string(x), STR_EMPTY) )
changespace(style, x);
break;
case ACAT: for( link = Down(x); link != x; link = NextDown(link) )
{ Child(y, link);
if( type(y) == GAP_OBJ || type(y) == NULL_CLOS ) continue;
else if( is_word(type(y)) )
{ if( !StringEqual(string(y), STR_EMPTY) )
changespace(style, y);
}
else Error(11, 3, "invalid left parameter of %s",
WARN, &fpos(x), KW_SPACE);
}
break;
default: Error(11, 4, "invalid left parameter of %s",
WARN, &fpos(x), KW_SPACE);
break;
}
debug1(DSS, D, "SpaceChange returning %s", EchoStyle(style));
} /* end SpaceChange */
/*@::BreakChange()@***********************************************************/
/* */
/* BreakChange(style, x) */
/* */
/* Change the current break style as indicated by object x. */
/* */
/*****************************************************************************/
static void changebreak(STYLE *style, OBJECT x)
{ GAP res_gap; unsigned gap_inc;
if( beginsbreakstyle(string(x)[0]) )
{
/* should be a new break style option */
if( StringEqual(string(x), STR_BREAK_HYPHEN) )
hyph_style(*style) = HYPH_ON;
else if( StringEqual(string(x), STR_BREAK_NOHYPHEN) )
hyph_style(*style) = HYPH_OFF;
else if( StringEqual(string(x), STR_BREAK_ADJUST) )
fill_style(*style) = FILL_ON, display_style(*style) = DISPLAY_ADJUST;
else if( StringEqual(string(x), STR_BREAK_OUTDENT) )
fill_style(*style) = FILL_ON, display_style(*style) = DISPLAY_OUTDENT;
else if( StringEqual(string(x), STR_BREAK_RAGGED) )
fill_style(*style) = FILL_ON, display_style(*style) = DISPLAY_LEFT;
else if( StringEqual(string(x), STR_BREAK_CRAGGED) )
fill_style(*style) = FILL_ON, display_style(*style) = DISPLAY_CENTRE;
else if( StringEqual(string(x), STR_BREAK_RRAGGED) )
fill_style(*style) = FILL_ON, display_style(*style) = DISPLAY_RIGHT;
else if( StringEqual(string(x), STR_BREAK_ORAGGED) )
fill_style(*style) = FILL_ON, display_style(*style) = DISPLAY_ORAGGED;
else if( StringEqual(string(x), STR_BREAK_LINES) )
fill_style(*style) = FILL_OFF, display_style(*style) = DISPLAY_LEFT;
else if( StringEqual(string(x), STR_BREAK_CLINES) )
fill_style(*style) = FILL_OFF, display_style(*style) = DISPLAY_CENTRE;
else if( StringEqual(string(x), STR_BREAK_RLINES) )
fill_style(*style) = FILL_OFF, display_style(*style) = DISPLAY_RIGHT;
else if( StringEqual(string(x), STR_BREAK_NOFIRST) )
nobreakfirst(*style) = TRUE;
else if( StringEqual(string(x), STR_BREAK_FIRST) )
nobreakfirst(*style) = FALSE;
else if( StringEqual(string(x), STR_BREAK_NOLAST) )
nobreaklast(*style) = TRUE;
else if( StringEqual(string(x), STR_BREAK_LAST) )
nobreaklast(*style) = FALSE;
else Error(11, 5, "unknown option to %s symbol (%s)",
WARN, &fpos(x), KW_BREAK, string(x));
}
else /* should be a new inter-line gap */
{ GetGap(x, style, &res_gap, &gap_inc);
if( gap_inc != GAP_ABS && units(res_gap) != units(line_gap(*style)) )
Error(11, 6, "line spacing %s is not compatible with current spacing",
WARN, &fpos(x), string(x));
else
{ units(line_gap(*style)) = units(res_gap);
mode(line_gap(*style)) = mode(res_gap);
width(line_gap(*style)) = gap_inc == GAP_ABS ? width(res_gap) :
gap_inc == GAP_INC ? width(line_gap(*style)) + width(res_gap) :
find_max(width(line_gap(*style)) - width(res_gap), 0);
}
}
} /* end changebreak */
void BreakChange(STYLE *style, OBJECT x)
{ OBJECT link, y;
debug2(DSS, D, "BreakChange(%s, %s)", EchoStyle(style), EchoObject(x));
switch( type(x) )
{
case NULL_CLOS: break;
case WORD:
case QWORD: if( !StringEqual(string(x), STR_EMPTY) )
changebreak(style, x);
break;
case ACAT: for( link = Down(x); link != x; link = NextDown(link) )
{ Child(y, link);
if( type(y) == GAP_OBJ || type(y) == NULL_CLOS ) continue;
else if( is_word(type(y)) )
{ if( !StringEqual(string(y), STR_EMPTY) )
changebreak(style, y);
}
else Error(11, 7, "invalid left parameter of %s",
WARN, &fpos(x), KW_BREAK);
}
break;
default: Error(11, 8, "invalid left parameter of %s",
WARN, &fpos(x), KW_BREAK);
break;
}
debug1(DSS, D, "BreakChange returning %s", EchoStyle(style));
} /* end BreakChange */
/*@::YUnitChange(), ZUnitChange()@********************************************/
/* */
/* YUnitChange(style, x) */
/* */
/* Change the current value of the y unit as indicated by object x. */
/* */
/*****************************************************************************/
void YUnitChange(STYLE *style, OBJECT x)
{ GAP res_gap; unsigned gap_inc;
GetGap(x, style, &res_gap, &gap_inc);
if( units(res_gap) != FIXED_UNIT )
Error(11, 9, "this unit not allowed with %s symbol",
WARN, &fpos(x), KW_YUNIT);
else
{ if( gap_inc == GAP_ABS ) yunit(*style) = width(res_gap);
else if( gap_inc == GAP_INC ) yunit(*style) += width(res_gap);
else yunit(*style) = find_max(yunit(*style) - width(res_gap), 0);
}
} /* end YUnitChange */
/*****************************************************************************/
/* */
/* ZUnitChange(style, x) */
/* */
/* Change the current value of the z unit as indicated by object x. */
/* */
/*****************************************************************************/
void ZUnitChange(STYLE *style, OBJECT x)
{ GAP res_gap; unsigned gap_inc;
GetGap(x, style, &res_gap, &gap_inc);
if( units(res_gap) != FIXED_UNIT )
Error(11, 10, "this unit not allowed with %s symbol",
WARN, &fpos(x), KW_ZUNIT);
else
{ if( gap_inc == GAP_ABS ) zunit(*style) = width(res_gap);
else if( gap_inc == GAP_INC ) zunit(*style) += width(res_gap);
else zunit(*style) = find_max(zunit(*style) - width(res_gap), 0);
}
} /* end ZUnitChange */
