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z11.c
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1994-01-23
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9KB
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183 lines
/*@z11.c:Style Service:EchoStyle()@*******************************************/
/* */
/* LOUT: A HIGH-LEVEL LANGUAGE FOR DOCUMENT FORMATTING (VERSION 2.05) */
/* COPYRIGHT (C) 1993 Jeffrey H. Kingston */
/* */
/* Jeffrey H. Kingston (jeff@cs.su.oz.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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* */
/* FILE: z11.c */
/* MODULE: Style Service */
/* EXTERNS: EchoStyle(), SpaceChange(), BreakChange() */
/* */
/*****************************************************************************/
#include "externs"
#if DEBUG_ON
/*****************************************************************************/
/* */
/* FULL_CHAR *EchoStyle(style) */
/* */
/* Returns a string showing the value of the style. */
/* */
/*****************************************************************************/
FULL_CHAR *EchoStyle(style)
STYLE *style;
{ FULL_CHAR buff1[100], buff2[100], buff3[100], buff4[100];
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 *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, 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)] : "?"));
StringCat(res, AsciiToFull("]"));
return res;
} /* end EchoStyle */
#endif
/*@::SpaceChange()@***********************************************************/
/* */
/* SpaceChange(style, x) */
/* */
/* Change the current break style as indicated by object x. */
/* */
/*****************************************************************************/
SpaceChange(style, x)
STYLE *style; OBJECT x;
{ GAP res_gap; unsigned gap_inc;
debug2(DSS, D, "SpaceChange(%s, %s)", EchoStyle(style), EchoObject(x));
if( !is_word(type(x)) )
{ Error(WARN, &fpos(x), "invalid left parameter to %s", KW_SPACE);
}
else
{ GetGap(x, style, &res_gap, &gap_inc);
if( gap_inc != GAP_ABS && units(res_gap) != units(space_gap(*style)) )
{ Error(WARN, &fpos(x), "space %s incompatible with enclosing", 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) :
max(width(space_gap(*style)) - width(res_gap), 0);
}
}
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 changebreak(style, x)
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_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 Error(WARN, &fpos(x), "invalid %s option %s", 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(WARN, &fpos(x),
"line spacing %s incompatible with enclosing", 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) :
max(width(line_gap(*style)) - width(res_gap), 0);
}
}
} /* end changebreak */
BreakChange(style, x)
STYLE *style; OBJECT x;
{ OBJECT link, y;
debug2(DSS, D, "BreakChange(%s, %s)", EchoStyle(style), EchoObject(x));
switch( type(x) )
{
case WORD:
case QWORD: changebreak(style, x);
break;
case ACAT: for( link = Down(x); link != x; link = NextDown(link) )
{ Child(y, link);
if( type(y) == GAP_OBJ ) continue;
else if( is_word(type(y)) ) changebreak(style, y);
else Error(WARN, &fpos(x), "invalid left parameter of %s",
KW_BREAK);
}
break;
default: Error(WARN, &fpos(x), "invalid left parameter of %s", KW_BREAK);
break;
}
debug1(DSS, D, "BreakChange returning %s", EchoStyle(style));
} /* end BreakChange */