146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/*
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* tumble: build a PDF file from image files
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*
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* PDF routines
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* Copyright 2003, 2017 Eric Smith <spacewar@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation. Note that permission is
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* not granted to redistribute this program under the terms of any
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* other version of the General Public License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "bitblt.h"
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#include "pdf.h"
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#include "pdf_util.h"
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#include "pdf_prim.h"
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#include "pdf_private.h"
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struct pdf_bookmark
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{
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pdf_obj_handle dict; /* indirect reference */
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pdf_obj_handle count;
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bool open;
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struct pdf_bookmark *first;
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struct pdf_bookmark *last;
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/* the following fields don't appear in the root */
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/* title and dest are in the dictionary but don't have
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explicit fields in the C structure */
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struct pdf_bookmark *parent;
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struct pdf_bookmark *prev;
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struct pdf_bookmark *next;
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};
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static void pdf_bookmark_update_count (pdf_bookmark_handle entry)
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{
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while (entry)
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{
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if (! entry->count)
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{
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entry->count = pdf_new_integer (0);
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pdf_set_dict_entry (entry->dict, "Count", entry->count);
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}
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pdf_set_integer (entry->count,
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pdf_get_integer (entry->count) +
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((entry->open) ? 1 : -1));
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if (! entry->open)
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break;
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entry = entry->parent;
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}
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}
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/* Create a new bookmark, under the specified parent, or at the top
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level if parent is NULL. */
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pdf_bookmark_handle pdf_new_bookmark (pdf_bookmark_handle parent,
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char *title,
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bool open,
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pdf_page_handle pdf_page)
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{
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pdf_file_handle pdf_file = pdf_page->pdf_file;
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struct pdf_bookmark *root;
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struct pdf_bookmark *entry;
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pdf_obj_handle dest_array;
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root = pdf_file->outline_root;
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if (! root)
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{
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root = pdf_calloc (1, sizeof (struct pdf_bookmark));
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root->dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
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pdf_file->outline_root = root;
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pdf_set_dict_entry (pdf_file->catalog, "Outlines", root->dict);
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}
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entry = pdf_calloc (1, sizeof (struct pdf_bookmark));
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entry->dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
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entry->open = open;
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pdf_set_dict_entry (entry->dict, "Title", pdf_new_string (title));
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dest_array = pdf_new_obj (PT_ARRAY);
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pdf_add_array_elem (dest_array, pdf_page->page_dict);
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pdf_add_array_elem (dest_array, pdf_new_name ("Fit"));
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pdf_set_dict_entry (entry->dict, "Dest", dest_array);
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if (parent)
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{
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entry->parent = parent;
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entry->prev = parent->last;
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}
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else
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{
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parent = root;
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entry->parent = root;
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entry->prev = root->last;
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}
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pdf_set_dict_entry (entry->dict, "Parent", parent->dict);
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if (entry->prev)
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{
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pdf_set_dict_entry (entry->dict, "Prev", entry->prev->dict);
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entry->prev->next = entry;
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pdf_set_dict_entry (entry->prev->dict, "Next", entry->dict);
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parent->last = entry;
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pdf_set_dict_entry (parent->dict, "Last", entry->dict);
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}
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else
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{
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parent->first = entry;
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pdf_set_dict_entry (parent->dict, "First", entry->dict);
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parent->last = entry;
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pdf_set_dict_entry (parent->dict, "Last", entry->dict);
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}
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pdf_bookmark_update_count (parent);
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return (entry);
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}
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