Generalise pdf_links to be fz_links.

Move to a non-pdf specific type for links. PDF specific parsing is
done in pdf_annots.c as before, but the essential type (and handling
functions for that type) are in a new file fitz/base_link.c.

The new type is more expressive than before; specifically all the
possible PDF modes are expressable in it. Hopefully this should
allow XPS links to be represented too.

1 files changed, 57 insertions, 0 deletions

diff --git a/fitz/base_link.c b/fitz/base_link.c
new file mode 100644
index 00000000..d8d7e3ab
--- /dev/null
+++ b/fitz/base_link.c
@@ -0,0 +1,57 @@
+#include "fitz.h"
+
+static void
+free_link_dest(fz_context *ctx, fz_link_kind kind, fz_link_dest *dest)
+{
+	switch(kind)
+	{
+	case FZ_LINK_GOTO:
+		break;
+	case FZ_LINK_URI:
+		fz_free(ctx, dest->uri.uri);
+		break;
+	case FZ_LINK_LAUNCH:
+		fz_free(ctx, dest->launch.file_spec);
+		break;
+	case FZ_LINK_NAMED:
+		fz_free(ctx, dest->named.named);
+		break;
+	case FZ_LINK_GOTOR:
+		fz_free(ctx, dest->gotor.file_spec);
+		break;
+	}
+}
+
+fz_link *
+fz_new_link(fz_context *ctx, fz_link_kind kind, fz_rect bbox, fz_link_dest dest)
+{
+	fz_link *link;
+
+	fz_try(ctx)
+	{
+		link = fz_malloc_struct(ctx, fz_link);
+	}
+	fz_catch(ctx)
+	{
+		free_link_dest(ctx, kind, &dest);
+		fz_rethrow(ctx);
+	}
+	link->kind = kind;
+	link->rect = bbox;
+	link->next = NULL;
+	return link;
+}
+
+void
+fz_free_link(fz_context *ctx, fz_link *link)
+{
+	fz_link *next;
+
+	while (link)
+	{
+		next = link->next;
+		free_link_dest(ctx, link->kind, &link->dest);
+		fz_free(ctx, link);
+		link = next;
+	}
+}