Put the document's version IDs into comments in the PS and PDF

[sgt/halibut] / bk_ps.c

diff --git a/bk_ps.c b/bk_ps.c
index 77b0ab5..c9f4223 100644 (file)
--- a/bk_ps.c
+++ b/bk_ps.c
@@ -6,6 +6,8 @@
 #include "halibut.h"
 #include "paper.h"
 
+static void ps_versionid(FILE *fp, word *words);
+
 paragraph *ps_config_filename(char *filename)
 {
     paragraph *p;
@@ -74,6 +76,14 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
     fprintf(fp, "%%%%EndProlog\n");
 
     fprintf(fp, "%%%%BeginSetup\n");
+
+    /*
+     * 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_versionid(fp, p->words);
+
     /*
      * Re-encode and re-metric the fonts.
      */
@@ -169,3 +179,42 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 
     sfree(filename);
 }
+
+static void ps_versionid(FILE *fp, word *words)
+{
+    fprintf(fp, "%% ");
+
+    for (; words; words = words->next) {
+       char *text;
+       int type;
+
+       switch (words->type) {
+         case word_HyperLink:
+         case word_HyperEnd:
+         case word_UpperXref:
+         case word_LowerXref:
+         case word_XrefEnd:
+         case word_IndexRef:
+           continue;
+       }
+
+       type = removeattr(words->type);
+
+       switch (type) {
+         case word_Normal:
+           text = utoa_dup(words->text);
+           break;
+         case word_WhiteSpace:
+           text = dupstr(" ");
+           break;
+         case word_Quote:
+           text = dupstr("'");
+           break;
+       }
+
+       fputs(text, fp);
+       sfree(text);
+    }
+
+    fprintf(fp, "\n");
+}