91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
#include "mupdf/fitz.h"
|
|
#include "mupdf/pdf.h"
|
|
|
|
static fz_outline *
|
|
pdf_load_outline_imp(fz_context *ctx, pdf_document *doc, pdf_obj *dict)
|
|
{
|
|
fz_outline *node, **prev, *first = NULL;
|
|
pdf_obj *obj;
|
|
pdf_obj *odict = dict;
|
|
|
|
fz_var(dict);
|
|
fz_var(first);
|
|
|
|
fz_try(ctx)
|
|
{
|
|
prev = &first;
|
|
while (dict && pdf_is_dict(ctx, dict))
|
|
{
|
|
if (pdf_mark_obj(ctx, dict))
|
|
break;
|
|
node = fz_new_outline(ctx);
|
|
*prev = node;
|
|
prev = &node->next;
|
|
|
|
obj = pdf_dict_get(ctx, dict, PDF_NAME(Title));
|
|
if (obj)
|
|
node->title = Memento_label(fz_strdup(ctx, pdf_to_text_string(ctx, obj)), "outline_title");
|
|
|
|
if ((obj = pdf_dict_get(ctx, dict, PDF_NAME(Dest))) != NULL)
|
|
node->uri = Memento_label(pdf_parse_link_dest(ctx, doc, obj), "outline_uri");
|
|
else if ((obj = pdf_dict_get(ctx, dict, PDF_NAME(A))) != NULL)
|
|
node->uri = Memento_label(pdf_parse_link_action(ctx, doc, obj, -1), "outline_uri");
|
|
else
|
|
node->uri = NULL;
|
|
|
|
if (node->uri && !fz_is_external_link(ctx, node->uri))
|
|
node->page = pdf_resolve_link(ctx, doc, node->uri, &node->x, &node->y);
|
|
else
|
|
node->page = -1;
|
|
|
|
obj = pdf_dict_get(ctx, dict, PDF_NAME(First));
|
|
if (obj)
|
|
{
|
|
node->down = pdf_load_outline_imp(ctx, doc, obj);
|
|
|
|
obj = pdf_dict_get(ctx, dict, PDF_NAME(Count));
|
|
if (pdf_to_int(ctx, obj) > 0)
|
|
node->is_open = 1;
|
|
}
|
|
|
|
dict = pdf_dict_get(ctx, dict, PDF_NAME(Next));
|
|
}
|
|
}
|
|
fz_always(ctx)
|
|
{
|
|
for (dict = odict; dict && pdf_obj_marked(ctx, dict); dict = pdf_dict_get(ctx, dict, PDF_NAME(Next)))
|
|
pdf_unmark_obj(ctx, dict);
|
|
}
|
|
fz_catch(ctx)
|
|
{
|
|
fz_drop_outline(ctx, first);
|
|
fz_rethrow(ctx);
|
|
}
|
|
|
|
return first;
|
|
}
|
|
|
|
fz_outline *
|
|
pdf_load_outline(fz_context *ctx, pdf_document *doc)
|
|
{
|
|
pdf_obj *root, *obj, *first;
|
|
fz_outline *outline = NULL;
|
|
|
|
root = pdf_dict_get(ctx, pdf_trailer(ctx, doc), PDF_NAME(Root));
|
|
obj = pdf_dict_get(ctx, root, PDF_NAME(Outlines));
|
|
first = pdf_dict_get(ctx, obj, PDF_NAME(First));
|
|
if (first)
|
|
{
|
|
/* cache page tree for fast link destination lookups */
|
|
pdf_load_page_tree(ctx, doc);
|
|
fz_try(ctx)
|
|
outline = pdf_load_outline_imp(ctx, doc, first);
|
|
fz_always(ctx)
|
|
pdf_drop_page_tree(ctx, doc);
|
|
fz_catch(ctx)
|
|
fz_rethrow(ctx);
|
|
}
|
|
|
|
return outline;
|
|
}
|