/* Copyright 2009-2011 Taco Hoekwater This file is part of LuaTeX. LuaTeX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. LuaTeX is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU General Public License along with LuaTeX; if not, see . */ #include "ptexlib.h" /*tex Data structure of outlines; it's not able to write out outline entries before all outline entries are defined, so memory allocated for outline entries can't not be deallocated and will stay in memory. For this reason we will store data of outline entries in |pdf->mem| instead of |mem|. */ /*tex The size of memory in |pdf->mem| which |obj_outline_ptr| points to: */ #define pdfmem_outline_size 8 /*tex The count of all opened children: */ #define obj_outline_count obj_info /*tex The pointer to |pdf->mem|: */ #define obj_outline_ptr obj_aux #define obj_outline_title(pdf,A) pdf->mem[obj_outline_ptr(pdf,A)] #define obj_outline_parent(pdf,A) pdf->mem[obj_outline_ptr(pdf,A) + 1] #define obj_outline_prev(pdf,A) pdf->mem[obj_outline_ptr(pdf,A) + 2] #define obj_outline_next(pdf,A) pdf->mem[obj_outline_ptr(pdf,A) + 3] #define obj_outline_first(pdf,A) pdf->mem[obj_outline_ptr(pdf,A) + 4] #define obj_outline_last(pdf,A) pdf->mem[obj_outline_ptr(pdf,A) + 5] #define obj_outline_action_objnum(pdf,A) pdf->mem[obj_outline_ptr(pdf,A) + 6] #define obj_outline_attr(pdf,A) pdf->mem[obj_outline_ptr(pdf,A) + 7] #define set_obj_outline_count(pdf,A,B) obj_outline_count(pdf,A)=B #define set_obj_outline_ptr(pdf,A,B) obj_outline_ptr(pdf,A)=B #define set_obj_outline_action_objnum(pdf,A,B) obj_outline_action_objnum(pdf,A)=B #define set_obj_outline_title(pdf,A,B) obj_outline_title(pdf,A)=B #define set_obj_outline_prev(pdf,A,B) obj_outline_prev(pdf,A)=B #define set_obj_outline_next(pdf,A,B) obj_outline_next(pdf,A)=B #define set_obj_outline_first(pdf,A,B) obj_outline_first(pdf,A)=B #define set_obj_outline_last(pdf,A,B) obj_outline_last(pdf,A)=B #define set_obj_outline_parent(pdf,A,B) obj_outline_parent(pdf,A)=B #define set_obj_outline_attr(pdf,A,B) obj_outline_attr(pdf,A)=B static int open_subentries(PDF pdf, halfword p) { int c, l, r; int k = 0; if (obj_outline_first(pdf, p) != 0) { l = obj_outline_first(pdf, p); do { k++; c = open_subentries(pdf, l); if (obj_outline_count(pdf, l) > 0) k = k + c; obj_outline_parent(pdf, l) = p; r = obj_outline_next(pdf, l); if (r == 0) obj_outline_last(pdf, p) = l; l = r; } while (l != 0); } if (obj_outline_count(pdf, p) > 0) obj_outline_count(pdf, p) = k; else obj_outline_count(pdf, p) = -k; return k; } /*tex Return the number of outline entries in the same level with |p|: */ static int outline_list_count(PDF pdf, pointer p) { int k = 1; while (obj_outline_prev(pdf, p) != 0) { k++; p = obj_outline_prev(pdf, p); } return k; } void scan_pdfoutline(PDF pdf) { halfword q, r; int i, k, l; int j = 0; halfword p = null; if (scan_keyword("attr")) { scan_toks(false, true); r = def_ref; } else { r = 0; } if (scan_keyword("useobjnum")) { scan_int(); j = cur_val; } else { p = scan_action(pdf); } if (scan_keyword("count")) { scan_int(); i = cur_val; } else { i = 0; } scan_toks(false, true); q = def_ref; if (j == 0) { j = pdf_create_obj(pdf, obj_type_others, 0); pdf_begin_obj(pdf, j, OBJSTM_ALWAYS); write_action(pdf, p); pdf_end_obj(pdf); delete_action_ref(p); } k = pdf_create_obj(pdf, obj_type_outline, 0); set_obj_outline_ptr(pdf, k, pdf_get_mem(pdf, pdfmem_outline_size)); set_obj_outline_action_objnum(pdf, k, j); set_obj_outline_count(pdf, k, i); l = pdf_create_obj(pdf, obj_type_others, 0); pdf_begin_obj(pdf, l, OBJSTM_ALWAYS); { char *s = tokenlist_to_cstring(q, true, NULL); pdf_print_str_ln(pdf, s); xfree(s); } delete_token_ref(q); pdf_end_obj(pdf); set_obj_outline_title(pdf, k, l); set_obj_outline_prev(pdf, k, 0); set_obj_outline_next(pdf, k, 0); set_obj_outline_first(pdf, k, 0); set_obj_outline_last(pdf, k, 0); set_obj_outline_parent(pdf, k, pdf->parent_outline); set_obj_outline_attr(pdf, k, r); if (pdf->first_outline == 0) pdf->first_outline = k; if (pdf->last_outline == 0) { if (pdf->parent_outline != 0) set_obj_outline_first(pdf, pdf->parent_outline, k); } else { set_obj_outline_next(pdf, pdf->last_outline, k); set_obj_outline_prev(pdf, k, pdf->last_outline); } pdf->last_outline = k; if (obj_outline_count(pdf, k) != 0) { pdf->parent_outline = k; pdf->last_outline = 0; } else if ((pdf->parent_outline != 0) && (outline_list_count(pdf, k) == abs(obj_outline_count(pdf, pdf->parent_outline)))) { j = pdf->last_outline; do { set_obj_outline_last(pdf, pdf->parent_outline, j); j = pdf->parent_outline; pdf->parent_outline = obj_outline_parent(pdf, pdf->parent_outline); } while (!((pdf->parent_outline == 0) || (outline_list_count(pdf, j) < abs(obj_outline_count(pdf, pdf->parent_outline))))); if (pdf->parent_outline == 0) pdf->last_outline = pdf->first_outline; else pdf->last_outline = obj_outline_first(pdf, pdf->parent_outline); while (obj_outline_next(pdf, pdf->last_outline) != 0) pdf->last_outline = obj_outline_next(pdf, pdf->last_outline); } } /*tex In the end we must flush \PDF\F objects that cannot be written out immediately after shipping out pages. */ int print_outlines(PDF pdf) { int k, l, a; int outlines; if (pdf->first_outline != 0) { outlines = pdf_create_obj(pdf, obj_type_others, 0); l = pdf->first_outline; k = 0; do { k++; a = open_subentries(pdf, l); if (obj_outline_count(pdf, l) > 0) k = k + a; set_obj_outline_parent(pdf, l, pdf->obj_ptr); l = obj_outline_next(pdf, l); } while (l != 0); pdf_begin_obj(pdf, outlines, OBJSTM_ALWAYS); pdf_begin_dict(pdf); pdf_dict_add_name(pdf, "Type", "Outlines"); pdf_dict_add_ref(pdf, "First", pdf->first_outline); pdf_dict_add_ref(pdf, "Last", pdf->last_outline); pdf_dict_add_int(pdf, "Count", k); pdf_end_dict(pdf); pdf_end_obj(pdf); /*tex Output \PDF\ outline entries. */ k = pdf->head_tab[obj_type_outline]; while (k != 0) { if (obj_outline_parent(pdf, k) == pdf->parent_outline) { if (obj_outline_prev(pdf, k) == 0) pdf->first_outline = k; if (obj_outline_next(pdf, k) == 0) pdf->last_outline = k; } pdf_begin_obj(pdf, k, OBJSTM_ALWAYS); pdf_begin_dict(pdf); pdf_dict_add_ref(pdf, "Title", obj_outline_title(pdf, k)); pdf_dict_add_ref(pdf, "A", obj_outline_action_objnum(pdf, k)); if (obj_outline_parent(pdf, k) != 0) pdf_dict_add_ref(pdf, "Parent", obj_outline_parent(pdf, k)); if (obj_outline_prev(pdf, k) != 0) pdf_dict_add_ref(pdf, "Prev", obj_outline_prev(pdf, k)); if (obj_outline_next(pdf, k) != 0) pdf_dict_add_ref(pdf, "Next", obj_outline_next(pdf, k)); if (obj_outline_first(pdf, k) != 0) pdf_dict_add_ref(pdf, "First", obj_outline_first(pdf, k)); if (obj_outline_last(pdf, k) != 0) pdf_dict_add_ref(pdf, "Last", obj_outline_last(pdf, k)); if (obj_outline_count(pdf, k) != 0) pdf_dict_add_int(pdf, "Count", obj_outline_count(pdf, k)); if (obj_outline_attr(pdf, k) != 0) { pdf_out(pdf, '\n'); pdf_print_toks(pdf, obj_outline_attr(pdf, k)); pdf_out(pdf, '\n'); delete_token_ref(obj_outline_attr(pdf, k)); set_obj_outline_attr(pdf, k, null); } pdf_end_dict(pdf); pdf_end_obj(pdf); k = obj_link(pdf, k); } } else { outlines = 0; } return outlines; }