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#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 = pdf_to_utf8(ctx, obj);
if ((obj = pdf_dict_get(ctx, dict, PDF_NAME(Dest))) != NULL)
node->uri = pdf_parse_link_dest(ctx, doc, obj);
else if ((obj = pdf_dict_get(ctx, dict, PDF_NAME(A))) != NULL)
node->uri = pdf_parse_link_action(ctx, doc, obj, -1);
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;
pdf_load_page_tree(ctx, doc); /* cache page tree for fast link destination lookups */
fz_try(ctx)
{
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)
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;
}
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