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|
/*@z51.c:Plain Text Back End:Plain_BackEnd@***********************************/
/* */
/* THE LOUT DOCUMENT FORMATTING SYSTEM (VERSION 3.26) */
/* COPYRIGHT (C) 1991, 2002 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: z51.c */
/* MODULE: Plain Text Back End */
/* EXTERNS: Plain_BackEnd, PlainCharWidth, PlainCharHeight, */
/* PlainFormFeed */
/* */
/*****************************************************************************/
#include "externs.h"
/*****************************************************************************/
/* */
/* PlainCharWidth the width of each character */
/* PlainCharHeight the height of each character */
/* PlainFormFeed TRUE if components to be separated by \f. */
/* */
/*****************************************************************************/
FULL_LENGTH PlainCharWidth, PlainCharHeight;
BOOLEAN PlainFormFeed;
/*****************************************************************************/
/* */
/* State variables for this module */
/* */
/*****************************************************************************/
static FILE *out_fp; /* file to print output on */
static int hsize; /* horizontal size of page in chars */
static int vsize; /* vertical size of page in chars */
static FULL_CHAR *page; /* the page (two-dim array of chars) */
static BOOLEAN prologue_done; /* TRUE after prologue is printed */
/*****************************************************************************/
/* */
/* void Plain_PrintInitialize(fp) */
/* */
/* Initialize this module; fp is the output file. */
/* */
/*****************************************************************************/
void Plain_PrintInitialize(FILE *fp)
{
debug0(DPT, DD, "Plain_PrintInitialize(fp)");
out_fp = fp;
prologue_done = FALSE;
debug0(DPT, DD, "Plain_PrintInitialize returning.");
} /* end Plain_PrintInitialize */
/*****************************************************************************/
/* */
/* void Plain_PrintLength(FULL_CHAR *buff, int length, int length_dim) */
/* */
/* Print a length (debugging only) */
/* */
/*****************************************************************************/
static void Plain_PrintLength(FULL_CHAR *buff, int length, int length_dim)
{
if( length_dim == COLM )
{
sprintf( (char *) buff, "%.2fs", (float) length/PlainCharWidth);
}
else
{
sprintf( (char *) buff, "%.2ff", (float) length/PlainCharHeight);
}
}
/*****************************************************************************/
/* */
/* void Plain_PrintPageSetupForFont(OBJECT face, int font_curr_page, */
/* FULL_CHAR *font_name, FULL_CHAR *first_size_str) */
/* */
/* Print the page setup commands required to use a font on some page: */
/* */
/* face The font face record, defining which font we need */
/* font_curr_page The current page number */
/* font_name The name of the font */
/* first_size_str No idea, have to check */
/* */
/*****************************************************************************/
static void Plain_PrintPageSetupForFont(OBJECT face, int font_curr_page,
FULL_CHAR *font_name, FULL_CHAR *first_size_str)
{
/* nothing to do here */
} /* end Plain_PrintPageSetupForFont */
/*****************************************************************************/
/* */
/* void Plain_PrintPageResourceForFont(FULL_CHAR *font_name, BOOLEAN first) */
/* BOOLEAN first) */
/* */
/* Print page resource info on file fp for font font_name; first is true */
/* if this is the first resource on this page. */
/* */
/*****************************************************************************/
static void Plain_PrintPageResourceForFont(FULL_CHAR *font_name, BOOLEAN first)
{
/* nothing to do here */
} /* end Plain_PrintPageResourceForFont */
/*****************************************************************************/
/* */
/* static void Plain_PrintMapping(MAPPING m) */
/* */
/* Print mapping m. */
/* */
/*****************************************************************************/
static void Plain_PrintMapping(MAPPING m)
{
/* nothing to do here */
} /* end Plain_PrintMapping */
/*****************************************************************************/
/* */
/* void Plain_PrintBeforeFirstPage(h, v, label) */
/* */
/* This procedure is called just before starting to print the first */
/* component of the output. Its size is h, v, and label is the page label. */
/* */
/*****************************************************************************/
static void Plain_PrintBeforeFirstPage(FULL_LENGTH h, FULL_LENGTH v,
FULL_CHAR *label)
{ int i, j;
debug2(DPT, DD, "PrintBeforeFirst(%d, %d)", h, v);
/* get a new page[] and clear it */
hsize = ceiling(h, PlainCharWidth);
vsize = ceiling(v, PlainCharHeight);
debug2(DPT, DD, " PlainCharWidth: %d; PlainCharHeight: %d",
PlainCharWidth, PlainCharHeight);
ifdebug(DMA, D, DebugRegisterUsage(MEM_PAGES, 1,
hsize * vsize * sizeof(FULL_CHAR)));
debug2(DPT, DD, " PrintBeforeFirst allocating %d by %d", hsize, vsize);
page = (FULL_CHAR *) malloc(hsize * vsize * sizeof(FULL_CHAR));
for( i = 0; i < vsize; i++ )
for( j = 0; j < hsize; j++ )
page[i*hsize + j] = ' ';
prologue_done = TRUE;
} /* end Plain_PrintBeforeFirstPage */
/*****************************************************************************/
/* */
/* void Plain_PrintBetweenPages(h, v, label) */
/* */
/* Start a new output component, of size h by v; label is the page label */
/* to attach to the %%Page comment. */
/* */
/*****************************************************************************/
static void Plain_PrintBetweenPages(FULL_LENGTH h, FULL_LENGTH v,
FULL_CHAR *label)
{ int new_hsize, new_vsize, i, j, jmax;
debug2(DPT, DD, "PrintBetween(%d, %d)", h, v);
/* print the page that has just ended */
ifdebug(DPT, D,
putc('+', out_fp);
for( j = 0; j < hsize; j++ ) putc('-', out_fp);
putc('+', out_fp);
putc('\n', out_fp);
);
for( i = vsize - 1; i >= 0; i-- )
{ ifdebug(DPT, D, putc('|', out_fp));
for( jmax = hsize-1; jmax >= 0 && page[i*hsize+jmax] == ' '; jmax--);
ifdebug(DPT, D, jmax = hsize - 1);
for( j = 0; j <= jmax; j++ )
putc(page[i*hsize + j], out_fp);
ifdebug(DPT, D, putc('|', out_fp));
putc('\n', out_fp);
}
ifdebug(DPT, D,
putc('+', out_fp);
for( j = 0; j < hsize; j++ ) putc('-', out_fp);
putc('+', out_fp);
putc('\n', out_fp);
);
/* separate the page from the next one with a form-feed if required */
if( PlainFormFeed ) putc('\f', out_fp);
/* if page size has changed, get a new page[] array */
new_hsize = ceiling(h, PlainCharWidth);
new_vsize = ceiling(v, PlainCharHeight);
if( new_hsize != hsize || new_vsize != vsize )
{
ifdebug(DMA, D, DebugRegisterUsage(MEM_PAGES, -1,
-hsize * vsize * sizeof(FULL_CHAR)));
free(page);
hsize = new_hsize;
vsize = new_vsize;
debug2(DPT, DD, " PrintBetween allocating %d by %d", hsize, vsize);
ifdebug(DPT, D, DebugRegisterUsage(MEM_PAGES, 1,
hsize * vsize * sizeof(FULL_CHAR)));
page = (FULL_CHAR *) malloc(hsize * vsize * sizeof(FULL_CHAR));
}
/* clear page[] for the new page just beginning */
for( i = 0; i < vsize; i++ )
for( j = 0; j < hsize; j++ )
page[i*hsize + j] = ' ';
} /* end Plain_PrintBetweenPges */
/*****************************************************************************/
/* */
/* Plain_PrintWord(x, hpos, vpos) */
/* */
/* Print non-empty word x; its marks cross at the point (hpos, vpos). */
/* */
/*****************************************************************************/
static void Plain_PrintWord(OBJECT x, int hpos, int vpos)
{ FULL_CHAR *p; int i, h, v;
debug6(DPT, DD, "Plain_PrintWord( %s, %d, %d ) font %d colour %d%s",
string(x), hpos, vpos, word_font(x), word_colour(x),
word_outline(x) ? " outline" : "");
TotalWordCount++;
h = ((float) hpos / PlainCharWidth) + 0.5;
v = ((float) vpos / PlainCharHeight);
debug3(DPT, DD, "PrintWord(%s at h = %d, v = %d)", string(x), h, v);
if( h >= 0 && h + StringLength(string(x)) < hsize && v >= 0 && v < vsize )
{
assert( h >= 0, "PrintWord: h < 0!" );
assert( h < hsize, "PrintWord: h >= hsize!" );
assert( v >= 0, "PrintWord: v < 0!" );
assert( v < vsize, "PrintWord: v >= vsize!" );
p = &page[v*hsize + h];
for( i = 0; string(x)[i] != '\0'; i++ )
*p++ = string(x)[i];
}
else
Error(51, 1, "word %s deleted (internal error, off page at %d,%d)",
WARN, &fpos(x), string(x), h, v);
debug0(DPT, DDD, "PrintWord returning");
} /* end Plain_PrintWord */
/*****************************************************************************/
/* */
/* Plain_PrintPlainGraphic(x, xmk, ymk, z) */
/* */
/* Print plain graphic object x at xmk, ymk with the size of z. */
/* */
/*****************************************************************************/
static void Plain_PrintPlainGraphic(OBJECT x, FULL_LENGTH xmk,
FULL_LENGTH ymk, OBJECT z)
{ int i, len, starth, startv, stoph, stopv, h, v;
debug2(DPT, D, "Plain_PrintPlainGraphic(x, xmk %s, ymk %s)",
EchoLength(xmk), EchoLength(ymk));
if( type(x) != WORD && type(x) != QWORD )
{
Error(51, 2, "left parameter of %s must be a simple word",
WARN, &fpos(x), KW_PLAINGRAPHIC);
return;
}
len = StringLength(string(x));
if( StringLength(string(x)) == 0 )
{
Error(51, 3, "left parameter of %s must be a non-empty word",
WARN, &fpos(x), KW_PLAINGRAPHIC);
return;
}
starth = (((float) xmk ) / PlainCharWidth) + 0.5;
startv = (((float) ymk ) / PlainCharHeight);
stoph = (((float) xmk + size(z, COLM)) / PlainCharWidth) + 0.5;
stopv = (((float) ymk - size(z, ROWM)) / PlainCharHeight); /* NB - not + */
SetLengthDim(COLM);
debug5(DPT, D, " xmk %s bk %s fwd %s -> %d,%d",
EchoLength(xmk), EchoLength(back(z, COLM)), EchoLength(fwd(z, COLM)),
starth, stoph);
SetLengthDim(ROWM);
debug5(DPT, D, " ymk %s bk %s fwd %s -> %d,%d",
EchoLength(ymk), EchoLength(back(z, ROWM)), EchoLength(fwd(z, ROWM)),
startv, stopv);
if( starth >= 0 && stoph < hsize && startv >= 0 && stopv < vsize )
{ i = 0;
for( v = startv-1; v >= stopv; v-- )
{
for( h = starth; h < stoph; h++ )
{
if( i == len ) i = 0;
page[v*hsize + h] = string(x)[i++];
}
}
}
else
{
Error(51, 4, "fill %s deleted (internal error, off page at %d,%d)",
WARN, &fpos(x), string(x), h, v);
}
} /* end Plain_PrintPlainGraphic */
/*****************************************************************************/
/* */
/* Plain_PrintUnderline(fnum, col, xstart, xstop, ymk) */
/* */
/* Draw an underline suitable for font fnum, in colour col, from xstart to */
/* xstop at the appropriate distance below mark ymk. */
/* */
/*****************************************************************************/
static void Plain_PrintUnderline(FONT_NUM fnum, COLOUR_NUM col,
FULL_LENGTH xstart, FULL_LENGTH xstop, FULL_LENGTH ymk)
{
debug5(DPT, DD, "Plain_PrintUnderline(fnum %d, col %d, xstart %s, xstop %s, ymk %s )",
fnum, col, EchoLength(xstart), EchoLength(xstop), EchoLength(ymk));
/* do nothing */
debug0(DPT, DD, "PrintUnderline returning.");
} /* end Plain_PrintUnderline */
/*****************************************************************************/
/* */
/* Plain_PrintAfterLastPage() */
/* */
/* Clean up this module and close output stream. */
/* */
/*****************************************************************************/
static void Plain_PrintAfterLastPage(void)
{ int i, j, jmax;
if( prologue_done )
{
/* print the page that has just ended (exists since prologue_done) */
ifdebug(DPT, D,
putc('+', out_fp);
for( j = 0; j < hsize; j++ ) putc('-', out_fp);
putc('+', out_fp);
putc('\n', out_fp);
);
for( i = vsize - 1; i >= 0; i-- )
{ ifdebug(DPT, D, putc('|', out_fp));
for( jmax = hsize-1; jmax >= 0 && page[i*hsize+jmax] == ' '; jmax--);
ifdebug(DPT, D, jmax = hsize - 1);
for( j = 0; j <= jmax; j++ )
putc(page[i*hsize + j], out_fp);
ifdebug(DPT, D, putc('|', out_fp));
putc('\n', out_fp);
}
ifdebug(DPT, D,
putc('+', out_fp);
for( j = 0; j < hsize; j++ ) putc('-', out_fp);
putc('+', out_fp);
putc('\n', out_fp);
);
}
} /* end Plain_PrintAfterLastPage */
/*****************************************************************************/
/* */
/* Plain_CoordTranslate(xdist, ydist) */
/* */
/* Translate coordinate system by the given x and y distances. */
/* */
/*****************************************************************************/
void Plain_CoordTranslate(FULL_LENGTH xdist, FULL_LENGTH ydist)
{ debug2(DPT, D, "Plain_CoordTranslate(%s, %s)",
EchoLength(xdist), EchoLength(ydist));
assert(FALSE, "Plain_CoordTranslate: should never be called!");
debug0(DPT, D, "Plain_CoordTranslate returning.");
} /* end Plain_CoordTranslate */
/*****************************************************************************/
/* */
/* Plain_CoordRotate(amount) */
/* */
/* Rotate coordinate system by given amount (in internal DG units) */
/* */
/*****************************************************************************/
static void Plain_CoordRotate(FULL_LENGTH amount)
{ debug1(DPT, D, "Plain_CoordRotate(%.1f degrees)", (float) amount / DG);
assert(FALSE, "Plain_CoordRotate: should never be called!");
debug0(DPT, D, "Plain_CoordRotate returning.");
} /* end Plain_CoordRotate */
/*****************************************************************************/
/* */
/* Plain_CoordScale(ratio, dim) */
/* */
/* Scale coordinate system by ratio in the given dimension. */
/* */
/*****************************************************************************/
void Plain_CoordScale(float hfactor, float vfactor)
{
assert(FALSE, "Plain_CoordScale: should never be called!");
} /* end Plain_CoordScale */
/*****************************************************************************/
/* */
/* Plain_SaveGraphicState(x) */
/* */
/* Save current coord system on stack for later restoration. */
/* Object x is just for error reporting, not really used at all. */
/* */
/*****************************************************************************/
void Plain_SaveGraphicState(OBJECT x)
{ debug0(DPT, D, "Plain_SaveGraphicState()");
assert(FALSE, "Plain_SaveGraphicState: should never be called!" );
debug0(DPT, D, "Plain_SaveGraphicState returning.");
} /* end Plain_SaveGraphicState */
/*****************************************************************************/
/* */
/* Plain_RestoreGraphicState() */
/* */
/* Restore previously saved coordinate system. */
/* */
/*****************************************************************************/
void Plain_RestoreGraphicState(void)
{ debug0(DPT, D, "Plain_RestoreGraphicState()");
assert(FALSE, "Plain_RestoreGraphicState: should never be called!" );
debug0(DPT, D, "Plain_RestoreGraphicState returning.");
} /* end Plain_RestoreGraphicState */
/*****************************************************************************/
/* */
/* Plain_PrintGraphicObject(x) */
/* */
/* Print object x on out_fp */
/* */
/*****************************************************************************/
void Plain_PrintGraphicObject(OBJECT x)
{
debug3(DPT, D, "Plain_PrintGraphicObject(%s %s %s)",
EchoFilePos(&fpos(x)), Image(type(x)), EchoObject(x));
assert(FALSE, "Plain_PrintGraphicObject: should never be called!" );
debug0(DPT, D, "Plain_PrintGraphicObject returning");
} /* end Plain_PrintGraphicObject */
/*****************************************************************************/
/* */
/* Plain_DefineGraphicNames(x) */
/* */
/* Generate PostScript for xsize, ysize etc. names of graphic object. */
/* */
/*****************************************************************************/
void Plain_DefineGraphicNames(OBJECT x)
{
debug1(DPT, D, "Plain_DefineGraphicNames( %s )", EchoObject(x));
debug1(DPT, DD, " style = %s", EchoStyle(&save_style(x)));
assert(FALSE, "Plain_DefineGraphicNames: should never be called!" );
debug0(DPT, D, "Plain_DefineGraphicNames returning.");
} /* end Plain_DefineGraphicNames */
/*****************************************************************************/
/* */
/* Plain_SaveTranslateDefineSave(x, xdist, ydist) */
/* */
/* Equivalent to the sequence of calls */
/* */
/* SaveGraphicState(x) */
/* CoordTranslate(xdist, ydist) */
/* DefineGraphicNames(x) */
/* SaveGraphicState(x) */
/* */
/* but offers opportunities for optimization. */
/* */
/*****************************************************************************/
void Plain_SaveTranslateDefineSave(OBJECT x, FULL_LENGTH xdist,
FULL_LENGTH ydist)
{
assert(FALSE, "Plain_SaveTranslateDefineSave: should never be called!" );
} /* end Plain_SaveTranslateDefineSave */
/*****************************************************************************/
/* */
/* Plain_PrintGraphicInclude(x, colmark, rowmark) */
/* */
/* Print graphic include file, with appropriate surrounds. */
/* */
/*****************************************************************************/
void Plain_PrintGraphicInclude(OBJECT x, FULL_LENGTH colmark,
FULL_LENGTH rowmark)
{
debug0(DPT, D, "Plain_PrintGraphicInclude(x)");
assert(FALSE, "Plain_PrintGraphicInclude: should never be called!" );
debug0(DPT, D, "Plain_PrintGraphicInclude returning.");
} /* end Plain_PrintGraphicInclude */
/*****************************************************************************/
/* */
/* Plain_LinkSource(name, llx, lly, urx, ury) */
/* */
/* Print a link source point. */
/* */
/*****************************************************************************/
static void Plain_LinkSource(OBJECT name, FULL_LENGTH llx, FULL_LENGTH lly,
FULL_LENGTH urx, FULL_LENGTH ury)
{
debug5(DPT, D, "Plain_LinkSource(%s, %d, %d, %d, %d)", EchoObject(name),
llx, lly, urx, ury);
/* do nothing; no links in plain text output */
debug0(DPT, D, "Plain_LinkSource returning.");
} /* end Plain_LinkSource */
/*****************************************************************************/
/* */
/* Plain_LinkDest(name, llx, lly, urx, ury) */
/* */
/* Print a link dest point. */
/* */
/* Still to do: check that the name has not been used by a previous */
/* dest point. */
/* */
/*****************************************************************************/
static void Plain_LinkDest(OBJECT name, FULL_LENGTH llx, FULL_LENGTH lly,
FULL_LENGTH urx, FULL_LENGTH ury)
{
debug5(DPT, D, "Plain_LinkDest(%s, %d, %d, %d, %d)", EchoObject(name),
llx, lly, urx, ury);
/* do nothing; no links in plain text output */
debug0(DPT, D, "Plain_LinkDest returning.");
} /* end Plain_LinkDest */
/*****************************************************************************/
/* */
/* Plain_LinkURL(url, llx, lly, urx, ury) */
/* */
/* Print an external link. */
/* */
/*****************************************************************************/
static void Plain_LinkURL(OBJECT url, FULL_LENGTH llx, FULL_LENGTH lly,
FULL_LENGTH urx, FULL_LENGTH ury)
{
debug5(DPT, D, "Plain_LinkURL(%s, %d, %d, %d, %d)", EchoObject(url),
llx, lly, urx, ury);
/* do nothing; no links in plain text output */
debug0(DPT, D, "Plain_LinkURL returning.");
} /* end Plain_LinkDest */
/*****************************************************************************/
/* */
/* Plain_LinkCheck() */
/* */
/* Called at end of run; will check that for every link source point there */
/* is a link dest point. */
/* */
/*****************************************************************************/
static void Plain_LinkCheck()
{
debug0(DPT, D, "Plain_LinkCheck()");
/* do nothing; no links in plain text output */
debug0(DPT, D, "Plain_LinkCheck returning.");
} /* end Plain_LinkCheck */
/*****************************************************************************/
/* */
/* Plain_BackEnd */
/* */
/* The record into which all of these functions are packaged. */
/* */
/*****************************************************************************/
static struct back_end_rec plain_back = {
PLAINTEXT, /* the code number of the back end */
STR_PLAINTEXT, /* string name of the back end */
FALSE, /* TRUE if @Scale is available */
FALSE, /* TRUE if @Rotate is available */
FALSE, /* TRUE if @Graphic is available */
FALSE, /* TRUE if @IncludeGraphic is avail. */
TRUE, /* TRUE if @PlainGraphic is avail. */
FALSE, /* TRUE if fractional spacing avail. */
FALSE, /* TRUE if actual font metrics used */
FALSE, /* TRUE if colour is available */
Plain_PrintInitialize,
Plain_PrintLength,
Plain_PrintPageSetupForFont,
Plain_PrintPageResourceForFont,
Plain_PrintMapping,
Plain_PrintBeforeFirstPage,
Plain_PrintBetweenPages,
Plain_PrintAfterLastPage,
Plain_PrintWord,
Plain_PrintPlainGraphic,
Plain_PrintUnderline,
Plain_CoordTranslate,
Plain_CoordRotate,
Plain_CoordScale,
Plain_SaveGraphicState,
Plain_RestoreGraphicState,
Plain_PrintGraphicObject,
Plain_DefineGraphicNames,
Plain_SaveTranslateDefineSave,
Plain_PrintGraphicInclude,
Plain_LinkSource,
Plain_LinkDest,
Plain_LinkURL,
Plain_LinkCheck,
};
BACK_END Plain_BackEnd = &plain_back;
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