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-rw-r--r--source/tools/pdfclean.c68
1 files changed, 62 insertions, 6 deletions
diff --git a/source/tools/pdfclean.c b/source/tools/pdfclean.c
index 446c778a..74b70394 100644
--- a/source/tools/pdfclean.c
+++ b/source/tools/pdfclean.c
@@ -34,15 +34,32 @@ static void usage(void)
exit(1);
}
+static int
+string_in_names_list(pdf_obj *p, pdf_obj *names_list)
+{
+ int n = pdf_array_len(names_list);
+ int i;
+ char *str = pdf_to_str_buf(p);
+
+ for (i = 0; i < n ; i += 2)
+ {
+ if (!strcmp(pdf_to_str_buf(pdf_array_get(names_list, i)), str))
+ return 1;
+ }
+ return 0;
+}
+
/*
* Recreate page tree to only retain specified pages.
*/
-
static void retainpages(globals *glo, int argc, char **argv)
{
pdf_obj *oldroot, *root, *pages, *kids, *countobj, *parent, *olddests;
pdf_document *doc = glo->doc;
int argidx = 0;
+ pdf_obj *names_list = NULL;
+ int pagecount;
+ int i;
/* Keep only pages/type and (reduced) dest entries to avoid
* references to unretained pages */
@@ -65,7 +82,7 @@ static void retainpages(globals *glo, int argc, char **argv)
/* Retain pages specified */
while (argc - argidx)
{
- int page, spage, epage, pagecount;
+ int page, spage, epage;
char *spec, *dash;
char *pagelist = argv[argidx];
@@ -123,26 +140,26 @@ static void retainpages(globals *glo, int argc, char **argv)
/* Also preserve the (partial) Dests name tree */
if (olddests)
{
- int i;
pdf_obj *names = pdf_new_dict(doc, 1);
pdf_obj *dests = pdf_new_dict(doc, 1);
- pdf_obj *names_list = pdf_new_array(doc, 32);
int len = pdf_dict_len(olddests);
+ names_list = pdf_new_array(doc, 32);
+
for (i = 0; i < len; i++)
{
pdf_obj *key = pdf_dict_get_key(olddests, i);
pdf_obj *val = pdf_dict_get_val(olddests, i);
- pdf_obj *key_str = pdf_new_string(doc, pdf_to_name(key), strlen(pdf_to_name(key)));
pdf_obj *dest = pdf_dict_gets(val, "D");
dest = pdf_array_get(dest ? dest : val, 0);
if (pdf_array_contains(pdf_dict_gets(pages, "Kids"), dest))
{
+ pdf_obj *key_str = pdf_new_string(doc, pdf_to_name(key), strlen(pdf_to_name(key)));
pdf_array_push(names_list, key_str);
pdf_array_push(names_list, val);
+ pdf_drop_obj(key_str);
}
- pdf_drop_obj(key_str);
}
root = pdf_dict_gets(pdf_trailer(doc), "Root");
@@ -155,6 +172,45 @@ static void retainpages(globals *glo, int argc, char **argv)
pdf_drop_obj(names_list);
pdf_drop_obj(olddests);
}
+
+ /* Force the next call to pdf_count_pages to recount */
+ glo->doc->page_count = 0;
+
+ /* Edit each pages /Annot list to remove any links that point to
+ * nowhere. */
+ pagecount = pdf_count_pages(doc);
+ for (i = 0; i < pagecount; i++)
+ {
+ pdf_obj *pageref = pdf_lookup_page_obj(doc, i);
+ pdf_obj *pageobj = pdf_resolve_indirect(pageref);
+
+ pdf_obj *annots = pdf_dict_gets(pageobj, "Annots");
+
+ int len = pdf_array_len(annots);
+ int j;
+
+ for (j = 0; j < len; j++)
+ {
+ pdf_obj *o = pdf_array_get(annots, j);
+ pdf_obj *p;
+
+ if (strcmp(pdf_to_name(pdf_dict_gets(o, "Subtype")), "Link"))
+ continue;
+
+ p = pdf_dict_gets(o, "A");
+ if (strcmp(pdf_to_name(pdf_dict_gets(p, "S")), "GoTo"))
+ continue;
+
+ if (string_in_names_list(pdf_dict_gets(p, "D"), names_list))
+ continue;
+
+ /* FIXME: Should probably look at Next too */
+
+ /* Remove this annotation */
+ pdf_array_delete(annots, j);
+ j--;
+ }
+ }
}
void pdfclean_clean(fz_context *ctx, char *infile, char *outfile, char *password, fz_write_options *opts, char *argv[], int argc)