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

[sgt/halibut] / bk_pdf.c

diff --git a/bk_pdf.c b/bk_pdf.c
index b68598c..fe10894 100644 (file)
--- a/bk_pdf.c
+++ b/bk_pdf.c
@@ -62,6 +62,7 @@ static void make_pages_node(object *node, object *parent, page_data *first,
                            page_data *last, object *resources);
 static int make_outline(object *parent, outline_element *start, int n,
                        int open);
+static int pdf_versionid(FILE *fp, word *words);
 
 void pdf_backend(paragraph *sourceform, keywordlist *keywords,
                 indexdata *idx, void *vdoc) {
@@ -372,9 +373,13 @@ void pdf_backend(paragraph *sourceform, keywordlist *keywords,
     }
 
     /*
-     * Header
+     * Header. I'm going to put the version IDs in the header as
+     * well, simply in PDF comments.
      */
     fileoff = fprintf(fp, "%%PDF-1.3\n");
+    for (p = sourceform; p; p = p->next)
+       if (p->type == para_VersionID)
+           fileoff += pdf_versionid(fp, p->words);
 
     /*
      * Body
@@ -660,3 +665,47 @@ static int make_outline(object *parent, outline_element *items, int n,
 
     return totalcount;
 }
+
+static int pdf_versionid(FILE *fp, word *words)
+{
+    int ret;
+
+    ret = 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);
+       ret += strlen(text);
+       sfree(text);
+    }
+
+    ret += fprintf(fp, "\n");
+
+    return ret;
+}