From 0bfe9501ebc2e2a2329a5435100ef189b6166219 Mon Sep 17 00:00:00 2001
From: Sebastian Rasmussen <sebras@gmail.com>
Date: Sat, 24 Aug 2013 23:07:06 +0200
Subject: Support named destinations in remote link annotations.

Previously there was a bug when parsing GoToR link annotations that had
a named destination. mupdf incorrectly attempted to resolve the
destination in the current document. Now the destination name is
present in the link objects returned to the application so it can
resolve any names for GoToR links in the remote document instead.
---
 source/pdf/pdf-annot.c | 42 +++++++++++++++++++++++++++---------------
 1 file changed, 27 insertions(+), 15 deletions(-)

(limited to 'source/pdf/pdf-annot.c')

diff --git a/source/pdf/pdf-annot.c b/source/pdf/pdf-annot.c
index 335f6512..eb999581 100644
--- a/source/pdf/pdf-annot.c
+++ b/source/pdf/pdf-annot.c
@@ -1,15 +1,20 @@
 #include "mupdf/pdf.h"
 
 static pdf_obj *
-resolve_dest_rec(pdf_document *doc, pdf_obj *dest, int depth)
+resolve_dest_rec(pdf_document *doc, pdf_obj *dest, fz_link_kind kind, int depth)
 {
 	if (depth > 10) /* Arbitrary to avoid infinite recursion */
 		return NULL;
 
 	if (pdf_is_name(dest) || pdf_is_string(dest))
 	{
-		dest = pdf_lookup_dest(doc, dest);
-		return resolve_dest_rec(doc, dest, depth+1);
+		if (kind == FZ_LINK_GOTO)
+		{
+			dest = pdf_lookup_dest(doc, dest);
+			dest = resolve_dest_rec(doc, dest, kind, depth+1);
+		}
+
+		return dest;
 	}
 
 	else if (pdf_is_array(dest))
@@ -20,7 +25,7 @@ resolve_dest_rec(pdf_document *doc, pdf_obj *dest, int depth)
 	else if (pdf_is_dict(dest))
 	{
 		dest = pdf_dict_gets(dest, "D");
-		return resolve_dest_rec(doc, dest, depth+1);
+		return resolve_dest_rec(doc, dest, kind, depth+1);
 	}
 
 	else if (pdf_is_indirect(dest))
@@ -30,13 +35,13 @@ resolve_dest_rec(pdf_document *doc, pdf_obj *dest, int depth)
 }
 
 static pdf_obj *
-resolve_dest(pdf_document *doc, pdf_obj *dest)
+resolve_dest(pdf_document *doc, pdf_obj *dest, fz_link_kind kind)
 {
-	return resolve_dest_rec(doc, dest, 0);
+	return resolve_dest_rec(doc, dest, kind, 0);
 }
 
 fz_link_dest
-pdf_parse_link_dest(pdf_document *doc, pdf_obj *dest)
+pdf_parse_link_dest(pdf_document *doc, fz_link_kind kind, pdf_obj *dest)
 {
 	fz_link_dest ld;
 	pdf_obj *obj;
@@ -49,17 +54,25 @@ pdf_parse_link_dest(pdf_document *doc, pdf_obj *dest)
 	int t_from_2 = 0;
 	int z_from_4 = 0;
 
-	ld.kind = FZ_LINK_GOTO;
+	ld.kind = kind;
 	ld.ld.gotor.flags = 0;
 	ld.ld.gotor.lt.x = 0;
 	ld.ld.gotor.lt.y = 0;
 	ld.ld.gotor.rb.x = 0;
 	ld.ld.gotor.rb.y = 0;
+	ld.ld.gotor.page = -1;
+	ld.ld.gotor.dest = NULL;
 
-	dest = resolve_dest(doc, dest);
-	if (dest == NULL || !pdf_is_array(dest))
+	dest = resolve_dest(doc, dest, kind);
+
+	if (pdf_is_name(dest))
+	{
+		ld.ld.gotor.dest = pdf_to_name(dest);
+		return ld;
+	}
+	else if (pdf_is_string(dest))
 	{
-		ld.kind = FZ_LINK_NONE;
+		ld.ld.gotor.dest = pdf_to_str_buf(dest);
 		return ld;
 	}
 
@@ -244,7 +257,7 @@ pdf_parse_action(pdf_document *doc, pdf_obj *action)
 	if (!strcmp(pdf_to_name(obj), "GoTo"))
 	{
 		dest = pdf_dict_gets(action, "D");
-		ld = pdf_parse_link_dest(doc, dest);
+		ld = pdf_parse_link_dest(doc, FZ_LINK_GOTO, dest);
 	}
 	else if (!strcmp(pdf_to_name(obj), "URI"))
 	{
@@ -269,9 +282,8 @@ pdf_parse_action(pdf_document *doc, pdf_obj *action)
 	else if (!strcmp(pdf_to_name(obj), "GoToR"))
 	{
 		dest = pdf_dict_gets(action, "D");
-		ld = pdf_parse_link_dest(doc, dest);
-		ld.kind = FZ_LINK_GOTOR;
 		file_spec = pdf_dict_gets(action, "F");
+		ld = pdf_parse_link_dest(doc, FZ_LINK_GOTOR, dest);
 		ld.ld.gotor.file_spec = pdf_parse_file_spec(doc, file_spec);
 		ld.ld.gotor.new_window = pdf_to_int(pdf_dict_gets(action, "NewWindow"));
 	}
@@ -298,7 +310,7 @@ pdf_load_link(pdf_document *doc, pdf_obj *dict, const fz_matrix *page_ctm)
 
 	obj = pdf_dict_gets(dict, "Dest");
 	if (obj)
-		ld = pdf_parse_link_dest(doc, obj);
+		ld = pdf_parse_link_dest(doc, FZ_LINK_GOTO, obj);
 	else
 	{
 		action = pdf_dict_gets(dict, "A");
-- 
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