X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/halibut/blobdiff_plain/3e32e06c2e95cae66f921be9da2a0993f4fde752..0dfaac7284d7f1a54e957bba4a881d93328c1630:/bk_ps.c

diff --git a/bk_ps.c b/bk_ps.c
index 61a7993..95c0451 100644
--- a/bk_ps.c
+++ b/bk_ps.c
@@ -3,10 +3,18 @@
  */
 
 #include <assert.h>
+#include <stdarg.h>
 #include "halibut.h"
 #include "paper.h"
 
+/* Ideal number of characters per line, for use in PostScript code */
+#define PS_WIDTH 79
+/* Absolute maxiumum characters per line, for use in DSC comments */
+#define PS_MAXWIDTH 255
+
 static void ps_comment(FILE *fp, char const *leader, word *words);
+static void ps_string_len(FILE *fp, int *cc, char const *str, int len);
+static void ps_string(FILE *fp, int *cc, char const *str);
 
 paragraph *ps_config_filename(char *filename)
 {
@@ -23,6 +31,9 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
     FILE *fp;
     char *filename;
     paragraph *p;
+    outline_element *oe;
+    int noe;
+    int cc; /* Character count on current line */
 
     IGNORE(keywords);
     IGNORE(idx);
@@ -37,7 +48,10 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 	}
     }
 
-    fp = fopen(filename, "w");
+    if (!strcmp(filename, "-"))
+	fp = stdout;
+    else
+	fp = fopen(filename, "w");
     if (!fp) {
 	error(err_cantopenw, filename);
 	return;
@@ -45,7 +59,7 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 
     fprintf(fp, "%%!PS-Adobe-3.0\n");
     fprintf(fp, "%%%%Creator: Halibut, %s\n", version);
-    fprintf(fp, "%%%%DocumentData: Clean8Bit\n");
+    fprintf(fp, "%%%%DocumentData: Clean7Bit\n");
     fprintf(fp, "%%%%LanguageLevel: 1\n");
     for (pageno = 0, page = doc->pages; page; page = page->next)
 	pageno++;
@@ -56,27 +70,29 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
     fprintf(fp, "%%%%DocumentNeededResources:\n");
     for (fe = doc->fonts->head; fe; fe = fe->next)
 	/* XXX This may request the same font multiple times. */
-	if (!fe->font->info->fp)
+	if (!fe->font->info->fontfile)
 	    fprintf(fp, "%%%%+ font %s\n", fe->font->info->name);
-    fprintf(fp, "%%%%DocumentSuppliedResources: procset Halibut 0 0\n");
+    fprintf(fp, "%%%%DocumentSuppliedResources: procset Halibut 0 3\n");
     for (fe = doc->fonts->head; fe; fe = fe->next)
 	/* XXX This may request the same font multiple times. */
-	if (fe->font->info->fp)
+	if (fe->font->info->fontfile)
 	    fprintf(fp, "%%%%+ font %s\n", fe->font->info->name);
     fprintf(fp, "%%%%EndComments\n");
 
     fprintf(fp, "%%%%BeginProlog\n");
-    fprintf(fp, "%%%%BeginResource: procset Halibut 0 0\n");
+    fprintf(fp, "%%%%BeginResource: procset Halibut 0 3\n");
     /*
      * Supply a prologue function which allows a reasonably
      * compressed representation of the text on the pages.
      * 
-     * Expects two arguments: a y-coordinate, and then an array.
+     * "t" expects two arguments: a y-coordinate, and then an array.
      * Elements of the array are processed sequentially as follows:
      * 
      *  - a number is treated as an x-coordinate
      *  - an array is treated as a (font, size) pair
      *  - a string is shown
+     *
+     * "r" takes four arguments, and behaves like "rectfill".
      */
     fprintf(fp,
 	    "/tdict 4 dict dup begin\n"
@@ -85,7 +101,40 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 	    "  /integertype /realtype load def\n"
 	    "  /stringtype {show} bind def\n"
 	    "end def\n"
-	    "/t { tdict begin {dup type exec} forall end pop } bind def\n");
+	    "/t { tdict begin {dup type exec} forall end pop } bind def\n"
+	    "/r { 4 2 roll moveto 1 index 0 rlineto 0 exch rlineto\n"
+	    "     neg 0 rlineto closepath fill } bind def\n");
+    /*
+     * pdfmark wrappers
+     *
+     * "p" generates a named destination referencing this page.
+     * "x" generates a link to a named destination.
+     * "u" generates a link to a URI.
+     * "o" generates an outline entry.
+     * "m" generates a general pdfmark.
+     *
+     * They all do nothing if pdfmark is undefined.
+     */
+    fprintf(fp,
+	    "/pdfmark where { pop\n"
+	    "  /p { [ /Dest 3 -1 roll /View [ /XYZ null null null ]\n"
+	    "       /DEST pdfmark } bind def\n"
+	    "  /x { [ /Dest 3 -1 roll /Rect 5 -1 roll /Border [0 0 0]\n"
+	    "       /Subtype /Link /ANN pdfmark } bind def\n"
+	    "  /u { 2 dict dup /Subtype /URI put dup /URI 4 -1 roll put\n"
+	    "       [ /Action 3 -1 roll /Rect 5 -1 roll /Border [0 0 0]\n"
+	    "       /Subtype /Link /ANN pdfmark } bind def\n"
+	    "  /o { [ /Count 3 -1 roll /Dest 5 -1 roll /Title 7 -1 roll\n"
+	    "       /OUT pdfmark } bind def\n"
+	    "  /m /pdfmark load def\n"
+	    "}\n");
+    fprintf(fp, "{\n"
+	    "  /p { pop } bind def\n"
+	    "  /x { pop pop } bind def\n"
+	    "  /u /x load def\n"
+	    "  /o { pop pop pop } bind def\n"
+	    "  /m /cleartomark load def\n"
+	    "} ifelse\n");
 
     fprintf(fp, "%%%%EndResource\n");
     fprintf(fp, "%%%%EndProlog\n");
@@ -93,23 +142,70 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
     fprintf(fp, "%%%%BeginSetup\n");
 
     /*
+     * Assign a destination name to each page for pdfmark purposes.
+     */
+    pageno = 0;
+    for (page = doc->pages; page; page = page->next) {
+	char *buf;
+	pageno++;
+	buf = snewn(12, char);
+	sprintf(buf, "/p%d", pageno);
+	page->spare = buf;
+    }
+
+    /*
      * This is as good a place as any to put version IDs.
      */
     for (p = sourceform; p; p = p->next)
 	if (p->type == para_VersionID)
 	    ps_comment(fp, "% ", p->words);
 
+    cc = 0;
+    /*
+     * Request the correct page size.  We might want to bracket this
+     * with "%%BeginFeature: *PageSize A4" or similar, and "%%EndFeature",
+     * but that would require us to have a way of getting the name of
+     * the page size given its dimensions.
+     */
+    ps_token(fp, &cc, "/setpagedevice where {\n");
+    ps_token(fp, &cc, "  pop 2 dict dup /PageSize [%g %g] put setpagedevice\n",
+	     doc->paper_width / FUNITS_PER_PT,
+	     doc->paper_height / FUNITS_PER_PT);
+    ps_token(fp, &cc, "} if\n");
+
+    ps_token(fp, &cc, "[/PageMode/UseOutlines/DOCVIEW m\n");
+    noe = doc->n_outline_elements;
+    for (oe = doc->outline_elements; noe; oe++, noe--) {
+	char *title;
+	int titlelen, count, i;
+
+	title = pdf_outline_convert(oe->pdata->outline_title, &titlelen);
+	if (oe->level == 0) {
+	    ps_token(fp, &cc, "[/Title");
+	    ps_string_len(fp, &cc, title, titlelen);
+	    ps_token(fp, &cc, "/DOCINFO m\n");
+	}
+
+	count = 0;
+	for (i = 1; i < noe && oe[i].level > oe->level; i++)
+	    if (oe[i].level == oe->level + 1)
+		count++;
+	if (oe->level > 0) count = -count;
+
+	ps_string_len(fp, &cc, title, titlelen);
+	sfree(title);
+	ps_token(fp, &cc, "%s %d o\n",
+		(char *)oe->pdata->first->page->spare, count);
+    }
+
     for (fe = doc->fonts->head; fe; fe = fe->next) {
 	/* XXX This may request the same font multiple times. */
-	if (fe->font->info->fp) {
-	    char buf[512];
-	    size_t len;
+	if (fe->font->info->fontfile) {
 	    fprintf(fp, "%%%%BeginResource: font %s\n", fe->font->info->name);
-	    rewind(fe->font->info->fp);
-	    do {
-		len = fread(buf, 1, sizeof(buf), fe->font->info->fp);
-		fwrite(buf, 1, len, fp);
-	    } while (len == sizeof(buf));
+	    if (fe->font->info->filetype == TYPE1)
+		pf_writeps(fe->font->info, fp);
+	    else
+		sfnt_writeps(fe->font->info, fp);
 	    fprintf(fp, "%%%%EndResource\n");
 	} else {
 	    fprintf(fp, "%%%%IncludeResource: font %s\n",
@@ -128,17 +224,16 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 	sprintf(fname, "f%d", font_index++);
 	fe->name = dupstr(fname);
 
-	fprintf(fp, "/%s findfont dup length dict begin\n",
+	ps_token(fp, &cc, "/%s findfont dup length dict begin\n",
 	    fe->font->info->name);
-	fprintf(fp, "{1 index /FID ne {def} {pop pop} ifelse} forall\n");
-	fprintf(fp, "/Encoding [\n");
+	ps_token(fp, &cc, "{1 index /FID ne {def} {pop pop} ifelse} forall\n");
+	ps_token(fp, &cc, "/Encoding [\n");
 	for (i = 0; i < 256; i++)
-	    fprintf(fp, "/%s%c", fe->vector[i] ? fe->vector[i] : ".notdef",
-		    i % 4 == 3 ? '\n' : ' ');
-	fprintf(fp, "] def\n");
-	fprintf(fp, "currentdict end\n");
-	fprintf(fp, "/fontname-%s exch definefont /%s exch def\n\n",
-	       fe->name, fe->name);
+	    ps_token(fp, &cc, "/%s", glyph_extern(fe->vector[i]));
+	ps_token(fp, &cc, "] def\n");
+	ps_token(fp, &cc, "currentdict end\n");
+	ps_token(fp, &cc, "/fontname-%s exch definefont /%s exch def\n",
+		 fe->name, fe->name);
     }
     fprintf(fp, "%%%%EndSetup\n");
 
@@ -149,47 +244,37 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
     for (page = doc->pages; page; page = page->next) {
 	text_fragment *frag, *frag_end;
 	rect *r;
+	xref *xr;
 	font_encoding *fe;
 	int fs;
 
 	pageno++;
 	fprintf(fp, "%%%%Page: %d %d\n", pageno, pageno);
-	fprintf(fp, "save\n");
-
-#if 0
-	{
-	    xref *xr;
-	    /*
-	     * I used this diagnostic briefly to ensure that
-	     * cross-reference rectangles were being put where they
-	     * should be.
-	     */
-	    for (xr = page->first_xref; xr; xr = xr->next) {
-		fprintf(fp, "gsave 0.7 setgray %g %g moveto",
-			xr->lx/FUNITS_PER_PT, xr->ty/FUNITS_PER_PT);
-		fprintf(fp, " %g %g lineto %g %g lineto",
-			xr->lx/FUNITS_PER_PT, xr->by/FUNITS_PER_PT,
-			xr->rx/FUNITS_PER_PT, xr->by/FUNITS_PER_PT);
-		fprintf(fp, " %g %g lineto closepath fill grestore\n",
-			xr->rx/FUNITS_PER_PT, xr->ty/FUNITS_PER_PT);
+	cc = 0;
+	ps_token(fp, &cc, "save %s p\n", (char *)page->spare);
+	
+	for (xr = page->first_xref; xr; xr = xr->next) {
+	    ps_token(fp, &cc, "[%g %g %g %g]",
+		    xr->lx/FUNITS_PER_PT, xr->by/FUNITS_PER_PT,
+		    xr->rx/FUNITS_PER_PT, xr->ty/FUNITS_PER_PT);
+	    if (xr->dest.type == PAGE) {
+		ps_token(fp, &cc, "%s x\n", (char *)xr->dest.page->spare);
+	    } else {
+		ps_string(fp, &cc, xr->dest.url);
+		ps_token(fp, &cc, "u\n");
 	    }
 	}
-#endif
 
 	for (r = page->first_rect; r; r = r->next) {
-	    fprintf(fp, "%g %g moveto %g 0 rlineto 0 %g rlineto "
-		    "-%g 0 rlineto closepath fill\n",
+	    ps_token(fp, &cc, "%g %g %g %g r\n",
 		    r->x / FUNITS_PER_PT, r->y / FUNITS_PER_PT,
-		    r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT,
-		    r->w / FUNITS_PER_PT);
+		    r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT);
 	}
 
 	frag = page->first_text;
 	fe = NULL;
 	fs = -1;
 	while (frag) {
-	    char *c;
-
 	    /*
 	     * Collect all the adjacent text fragments with the
 	     * same y-coordinate.
@@ -198,42 +283,40 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 		 frag_end && frag_end->y == frag->y;
 		 frag_end = frag_end->next);
 
-	    fprintf(fp, "%g[", frag->y / FUNITS_PER_PT);
+	    ps_token(fp, &cc, "%g[", frag->y / FUNITS_PER_PT);
 
 	    while (frag && frag != frag_end) {
 
 		if (frag->fe != fe || frag->fontsize != fs)
-		    fprintf(fp, "[%s %d]", frag->fe->name, frag->fontsize);
+		    ps_token(fp, &cc, "[%s %d]",
+			     frag->fe->name, frag->fontsize);
 		fe = frag->fe;
 		fs = frag->fontsize;
 
-		fprintf(fp, "%g(", frag->x/FUNITS_PER_PT);
-		for (c = frag->text; *c; c++) {
-		    if (*c == '(' || *c == ')' || *c == '\\')
-			fputc('\\', fp);
-		    fputc(*c, fp);
-		}
-		fprintf(fp, ")");
+		ps_token(fp, &cc, "%g", frag->x/FUNITS_PER_PT);
+		ps_string(fp, &cc, frag->text);
 
 		frag = frag->next;
 	    }
 
-	    fprintf(fp, "]t\n");
+	    ps_token(fp, &cc, "]t\n");
 	}
 
-	fprintf(fp, "restore showpage\n");
+	ps_token(fp, &cc, "restore showpage\n");
     }
 
     fprintf(fp, "%%%%EOF\n");
 
-    fclose(fp);
+    if (fp != stdout)
+	fclose(fp);
 
     sfree(filename);
 }
 
-static void ps_comment(FILE *fp, char const *leader, word *words)
-{
-    fprintf(fp, "%s", leader);
+static void ps_comment(FILE *fp, char const *leader, word *words) {
+    int cc = 0;
+
+    cc += fprintf(fp, "%s", leader);
 
     for (; words; words = words->next) {
 	char *text;
@@ -263,9 +346,69 @@ static void ps_comment(FILE *fp, char const *leader, word *words)
 	    break;
 	}
 
-	fputs(text, fp);
+	if (cc + strlen(text) > PS_MAXWIDTH)
+	    text[PS_MAXWIDTH - cc] = 0;
+	cc += fprintf(fp, "%s", text);
 	sfree(text);
     }
 
     fprintf(fp, "\n");
 }
+
+void ps_token(FILE *fp, int *cc, char const *fmt, ...) {
+    va_list ap;
+
+    va_start(ap, fmt);
+    if (*cc >= PS_WIDTH - 10) {
+	fprintf(fp, "\n");
+	*cc = 0;
+    }
+    *cc += vfprintf(fp, fmt, ap);
+    /* Assume that \n only occurs at the end of a string */
+    if (fmt[strlen(fmt) - 1] == '\n')
+	*cc = 0;
+}
+
+static void ps_string_len(FILE *fp, int *cc, char const *str, int len) {
+    char const *c;
+    int score = 0;
+
+    for (c = str; c < str+len; c++) {
+	if (*c < ' ' || *c > '~')
+	    score += 2;
+	else if (*c == '(' || *c == ')' || *c == '\\')
+	    score += 0;
+	else
+	    score -= 1;
+    }
+    if (score > 0) {
+	ps_token(fp, cc, "<");
+	for (c = str; c < str+len; c++) {
+	    ps_token(fp, cc, "%02X", 0xFF & (int)*c);
+	}
+	ps_token(fp, cc, ">");
+    } else {
+	*cc += fprintf(fp, "(");
+	for (c = str; c < str+len; c++) {
+	    if (*cc >= PS_WIDTH - 4) {
+		fprintf(fp, "\\\n");
+		*cc = 0;
+	    }
+	    if (*c < ' ' || *c > '~') {
+		*cc += fprintf(fp, "\\%03o", 0xFF & (int)*c);
+	    } else {
+		if (*c == '(' || *c == ')' || *c == '\\') {
+		    fputc('\\', fp);
+		    (*cc)++;
+		}
+		fputc(*c, fp);
+		(*cc)++;
+	    }
+	}
+	*cc += fprintf(fp, ")");
+    }
+}
+
+static void ps_string(FILE *fp, int *cc, char const *str) {
+    ps_string_len(fp, cc, str, strlen(str));
+}