X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/halibut/blobdiff_plain/b0f1f943a034803834ea85f453a1a959af1dd139..83ac0debd7ddd9dfd9defefbcd15c8bef7905d6f:/bk_ps.c

diff --git a/bk_ps.c b/bk_ps.c
index 7b2f439..41b70d2 100644
--- a/bk_ps.c
+++ b/bk_ps.c
@@ -7,6 +7,8 @@
 #include "paper.h"
 
 static void ps_comment(FILE *fp, char const *leader, word *words);
+static void ps_string_len(FILE *fp, char const *str, int len);
+static void ps_string(FILE *fp, char const *str);
 
 paragraph *ps_config_filename(char *filename)
 {
@@ -23,6 +25,9 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
     FILE *fp;
     char *filename;
     paragraph *p;
+    outline_element *oe;
+    int noe;
+
 
     IGNORE(keywords);
     IGNORE(idx);
@@ -45,7 +50,7 @@ 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++;
@@ -56,32 +61,63 @@ 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. */
-	fprintf(fp, "%%%%+ font %s\n", fe->font->name);
-    fprintf(fp, "%%%%DocumentSuppliedResources: procset Halibut 0 0\n");
+	if (!fe->font->info->fp)
+	    fprintf(fp, "%%%%+ font %s\n", fe->font->info->name);
+    fprintf(fp, "%%%%DocumentSuppliedResources: procset Halibut 0 2\n");
+    for (fe = doc->fonts->head; fe; fe = fe->next)
+	/* XXX This may request the same font multiple times. */
+	if (fe->font->info->fp)
+	    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 2\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"
+	    "  /arraytype {aload pop scalefont setfont} bind def\n"
+	    "  /realtype {1 index moveto} bind def\n"
+	    "  /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"
+	    "/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.
+     *
+     * They all do nothing if pdfmark is undefined.
      */
     fprintf(fp,
-	    "/t {\n"
-	    "  exch /y exch def {\n"
-	    "    /x exch def\n"
-	    "    x type [] type eq {x aload pop scalefont setfont} if\n"
-	    "    x type dup 1 type eq exch 1.0 type eq or {x y moveto} if\n"
-	    "    x type () type eq {x show} if\n"
-	    "  } forall\n"
-	    "} def\n");
+	    "/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"
+	    "} {\n"
+	    "  /p { pop } bind def\n"
+	    "  /x { pop pop } bind def\n"
+	    "  /u /x load def\n"
+	    "} ifelse\n");
 
     fprintf(fp, "%%%%EndResource\n");
     fprintf(fp, "%%%%EndProlog\n");
@@ -89,18 +125,80 @@ 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);
 
-    for (fe = doc->fonts->head; fe; fe = fe->next)
+    /*
+     * 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.
+     */
+    fprintf(fp, "/setpagedevice where {\n");
+    fprintf(fp, "  pop 2 dict dup /PageSize [%g %g] put setpagedevice\n",
+	    doc->paper_width / FUNITS_PER_PT,
+	    doc->paper_height / FUNITS_PER_PT);
+    fprintf(fp, "} if\n");
+
+    /* Outline etc, only if pdfmark is supported */
+    fprintf(fp, "/pdfmark where { pop %% if\n");
+    fprintf(fp, "  [/PageMode/UseOutlines/DOCVIEW pdfmark\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);
+
+	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;
+
+	fprintf(fp, "  [/Title");
+	ps_string_len(fp, title, titlelen);
+	sfree(title);
+	fprintf(fp, "/Dest%s/Count %d/OUT pdfmark\n",
+		(char *)oe->pdata->first->page->spare, count);
+    }
+    fprintf(fp, "} if\n");
+
+    for (fe = doc->fonts->head; fe; fe = fe->next) {
 	/* XXX This may request the same font multiple times. */
-	fprintf(fp, "%%%%IncludeResource: font %s\n", fe->font->name);
+	if (fe->font->info->fp) {
+	    char buf[512];
+	    size_t len;
+	    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));
+	    fprintf(fp, "%%%%EndResource\n");
+	} else {
+	    fprintf(fp, "%%%%IncludeResource: font %s\n",
+		    fe->font->info->name);
+	}
+    }
 
     /*
-     * Re-encode and re-metric the fonts.
+     * Re-encode the fonts.
      */
     font_index = 0;
     for (fe = doc->fonts->head; fe; fe = fe->next) {
@@ -110,20 +208,15 @@ 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", fe->font->name);
+	fprintf(fp, "/%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");
 	for (i = 0; i < 256; i++)
-	    fprintf(fp, "/%s\n", fe->vector[i] ? fe->vector[i] : ".notdef");
-	fprintf(fp, "] def /Metrics 256 dict dup begin\n");
-	for (i = 0; i < 256; i++) {
-	    if (fe->indices[i] >= 0) {
-		double width = fe->font->widths[fe->indices[i]];
-		fprintf(fp, "/%s %g def\n", fe->vector[i],
-			1000.0 * width / 4096.0);
-	    }
-	}
-	fprintf(fp, "end def currentdict end\n");
+	    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);
     }
@@ -136,43 +229,36 @@ 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);
-
-#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/4096.0, xr->ty/4096.0);
-		fprintf(fp, " %g %g lineto %g %g lineto",
-			xr->lx/4096.0, xr->by/4096.0,
-			xr->rx/4096.0, xr->by/4096.0);
-		fprintf(fp, " %g %g lineto closepath fill grestore\n",
-			xr->rx/4096.0, xr->ty/4096.0);
+	fprintf(fp, "save %s p\n", (char *)page->spare);
+	
+	for (xr = page->first_xref; xr; xr = xr->next) {
+	    fprintf(fp, "[%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) {
+		fprintf(fp, "%s x\n", (char *)xr->dest.page->spare);
+	    } else {
+		ps_string(fp, xr->dest.url);
+		fprintf(fp, "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",
-		    r->x / 4096.0, r->y / 4096.0, r->w / 4096.0,
-		    r->h / 4096.0, r->w / 4096.0);
+	    fprintf(fp, "%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);
 	}
 
 	frag = page->first_text;
+	fe = NULL;
+	fs = -1;
 	while (frag) {
-	    font_encoding *fe;
-	    int fs;
-	    char *c;
-
 	    /*
 	     * Collect all the adjacent text fragments with the
 	     * same y-coordinate.
@@ -181,10 +267,7 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 		 frag_end && frag_end->y == frag->y;
 		 frag_end = frag_end->next);
 
-	    fprintf(fp, "%g[", frag->y / 4096.0);
-
-	    fe = NULL;
-	    fs = -1;
+	    fprintf(fp, "%g[", frag->y / FUNITS_PER_PT);
 
 	    while (frag && frag != frag_end) {
 
@@ -193,13 +276,8 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 		fe = frag->fe;
 		fs = frag->fontsize;
 
-		fprintf(fp, "%g(", frag->x/4096.0);
-		for (c = frag->text; *c; c++) {
-		    if (*c == '(' || *c == ')' || *c == '\\')
-			fputc('\\', fp);
-		    fputc(*c, fp);
-		}
-		fprintf(fp, ")");
+		fprintf(fp, "%g", frag->x/FUNITS_PER_PT);
+		ps_string(fp, frag->text);
 
 		frag = frag->next;
 	    }
@@ -207,7 +285,7 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 	    fprintf(fp, "]t\n");
 	}
 
-	fprintf(fp, "showpage\n");
+	fprintf(fp, "restore showpage\n");
     }
 
     fprintf(fp, "%%%%EOF\n");
@@ -255,3 +333,40 @@ static void ps_comment(FILE *fp, char const *leader, word *words)
 
     fprintf(fp, "\n");
 }
+
+static void ps_string_len(FILE *fp, 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) {
+	fprintf(fp, "<");
+	for (c = str; c < str+len; c++) {
+	    fprintf(fp, "%02X", 0xFF & (int)*c);
+	}
+	fprintf(fp, ">");
+    } else {
+	fprintf(fp, "(");
+	for (c = str; c < str+len; c++) {
+	    if (*c < ' ' || *c > '~') {
+		fprintf(fp, "\\%03o", 0xFF & (int)*c);
+	    } else {
+		if (*c == '(' || *c == ')' || *c == '\\')
+		    fputc('\\', fp);
+		fputc(*c, fp);
+	    }
+	}
+	fprintf(fp, ")");
+    }
+}
+
+static void ps_string(FILE *fp, char const *str) {
+    ps_string_len(fp, str, strlen(str));
+}