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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 */