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/* catdvi - get text from DVI files
Copyright (C) 1999 Antti-Juhani Kaijanaho <gaia@iki.fi>
Copyright (C) 2000-02 Bjoern Brill <brill@fs.math.uni-frankfurt.de>
This program 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.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Files that need some of the internals of page.c exposed should include
* this header rather than page.h
*/
#ifndef PAGE2_H
#define PAGE2_H
#include "page.h"
/* A page is modeled as an ordered doubly-linked list of boxes (x, y,
glyph), where the ordering is left-to-right top-to-bottom. */
enum box_flag_t {
BF_SWIMMING = 1 << 0,
/* (x, y) != (left border, baseline). We need to
* move this one to the "logically right" place.
*/
BF_HAS_AXIS = 1 << 1,
/* box_t.axis is valid, i.e. we know where the math
* axis passes through this box.
*/
BF_ON_AXIS = 1 << 2,
/* This box is centered on the math axis (e.g. the
* big operators). Implies BF_SWIMMING.
*/
BF_RADICAL = 1 << 3,
/* This is a radical sign (and hence "hanging down"
* from the y coordinate). Implies BF_SWIMMING.
*/
BF_DIACRITIC = 1 << 4
/* This is a diacritical mark. Often its baseline is vertically
* displaced against the baseline of the glyph it should accent
* because the combination looks better this way).
* Implies BF_SWIMMING.
*/
};
struct box_t {
sint32 x;
sint32 y;
sint32 axis;
sint32 width;
sint32 height;
sint32 depth;
sint32 axis_height; /* The TeX font parameter. <= 0 if unknown. */
glyph_t glyph;
font_t font;
enum box_flag_t flags;
};
typedef struct list_node_t list_node_t;
struct list_node_t {
struct box_t b;
struct list_node_t * prev;
struct list_node_t * next;
};
/* List support variables. Note that most insertions happen near the
previous insertion, so it's beneficial to keep a pointer to the
last inserted node. */
extern struct list_node_t * list_head;
extern struct list_node_t * list_tail;
extern struct list_node_t * list_latest; /* Node that was inserted last. */
/* normalize placement of combining diacritics */
void page_adjust_diacritics(void);
/* normalize placement of big operators etc. */
void page_adjust_texmext(void);
/* normalize placement of radicals */
void page_adjust_radicals(void);
#endif /* PAGE2_H */
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