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