fz_outline * pdf_load_outline(pdf_document *xref) { pdf_obj *root, *obj, *first; root = pdf_dict_gets(xref->trailer, "Root"); obj = pdf_dict_gets(root, "Outlines"); first = pdf_dict_gets(obj, "First"); if (first) return pdf_load_outline_imp(xref, first); return NULL; }
fz_outline * pdf_load_outline(fz_context *ctx, pdf_document *doc) { pdf_obj *root, *obj, *first; 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) return pdf_load_outline_imp(ctx, doc, first); return NULL; }
fz_outline * pdf_load_outline(pdf_xref *xref) { fz_obj *root, *obj, *first; fz_context *ctx = xref->ctx; root = fz_dict_gets(ctx, xref->trailer, "Root"); obj = fz_dict_gets(ctx, root, "Outlines"); first = fz_dict_gets(ctx, obj, "First"); if (first) return pdf_load_outline_imp(xref, first); return NULL; }
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; }
static fz_outline * pdf_load_outline_imp(pdf_xref *xref, fz_obj *dict) { pdf_link *link; fz_outline *node; fz_obj *obj; /* SumatraPDF: prevent potential stack overflow */ fz_outline *prev, *root = NULL; fz_obj *origDict = dict; fz_context *ctx = xref->ctx; if (fz_is_null(ctx, dict)) return NULL; /* SumatraPDF: prevent cyclic outlines */ do { if (fz_dict_gets(ctx, dict, ".seen")) break; obj = fz_new_null(ctx); fz_dict_puts(ctx, dict, ".seen", obj); fz_drop_obj(ctx, obj); node = fz_malloc(ctx, sizeof(fz_outline)); node->title = NULL; node->page = -1; node->down = NULL; node->next = NULL; obj = fz_dict_gets(ctx, dict, "Title"); if (obj) node->title = pdf_to_utf8(ctx, obj); /* SumatraPDF: support expansion states */ node->is_open = fz_to_int(ctx, fz_dict_gets(ctx, dict, "Count")) >= 0; /* SumatraPDF: extended outline actions */ node->data = node->free_data = NULL; if (fz_dict_gets(ctx, dict, "Dest") || fz_dict_gets(ctx, dict, "A")) { link = pdf_load_link(xref, dict); if (link) /* SumatraPDF: don't crash if it's no link after all */ { if (link->kind == PDF_LINK_GOTO) node->page = pdf_find_page_number(xref, fz_array_get(ctx, link->dest, 0)); /* SumatraPDF: extended outline actions */ node->data = link; node->free_data = pdf_free_link; } } obj = fz_dict_gets(ctx, dict, "First"); if (obj) node->down = pdf_load_outline_imp(xref, obj); /* SumatraPDF: prevent potential stack overflow */ if (!root) prev = root = node; else prev = prev->next = node; dict = fz_dict_gets(ctx, dict, "Next"); } while (dict && !fz_is_null(ctx, dict)); node = root; /* SumatraPDF: prevent cyclic outlines */ for (dict = origDict; dict && fz_dict_gets(ctx, dict, ".seen"); dict = fz_dict_gets(ctx, dict, "Next")) fz_dict_dels(ctx, dict, ".seen"); return node; }
static fz_outline * pdf_load_outline_imp(fz_context *ctx, pdf_document *doc, pdf_obj *dict) { fz_outline *node, **prev, *first; pdf_obj *obj; pdf_obj *odict = dict; fz_var(dict); fz_var(first); fz_try(ctx) { first = NULL; 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); else node->uri = NULL; if (node->uri) node->page = pdf_resolve_link(ctx, doc, node->uri, NULL, NULL); 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; }