/* xml.c -- xml output, both TexinfoML and Docbook.
   $Id: xml.c,v 1.75 2008/01/31 18:33:27 karl Exp $

   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
   Free Software Foundation, Inc.

   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 3 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, see <http://www.gnu.org/licenses/>.

   Originally written by Philippe Martin <feloy@free.fr>.  */

#include "system.h"
#include "makeinfo.h"
#include "insertion.h"
#include "files.h"
#include "float.h"
#include "macro.h"
#include "cmds.h"
#include "lang.h"

#include "xml.h"

#include <assert.h>

#if !__OPTIMIZE__
/* To make enum names available to debugger. */
static enum xml_element xml_element_dummy;
#endif

typedef struct _element
{
  char name[32];
  int contains_para;
  int contained_in_para;
  int keep_space;
} element;

element texinfoml_element_list [] = {
  { "texinfo",             1, 0, 0 },
  { "setfilename",         0, 0, 0 },
  { "titlefont",           0, 0, 0 },
  { "settitle",            0, 0, 0 },
  { "documentdescription", 1, 0, 0 },

  { "node",                1, 0, 0 },
  { "nodenext",            0, 0, 0 },
  { "nodeprev",            0, 0, 0 },
  { "nodeup",              0, 0, 0 },

  { "chapter",             1, 0, 0 },
  { "section",             1, 0, 0 },
  { "subsection",          1, 0, 0 },
  { "subsubsection",       1, 0, 0 },

  { "top",                 1, 0, 0 },
  { "unnumbered",          1, 0, 0 },
  { "unnumberedsec",       1, 0, 0 },
  { "unnumberedsubsec",    1, 0, 0 },
  { "unnumberedsubsubsec", 1, 0, 0 },

  { "appendix",            1, 0, 0 },
  { "appendixsec",         1, 0, 0 },
  { "appendixsubsec",      1, 0, 0 },
  { "appendixsubsubsec",   1, 0, 0 },

  { "majorheading",        0, 0, 0 },
  { "chapheading",         0, 0, 0 },
  { "heading",             0, 0, 0 },
  { "subheading",          0, 0, 0 },
  { "subsubheading",       0, 0, 0 },

  { "titlepage",           1, 0, 0 },
  { "author",              0, 0, 0 },
  { "booktitle",           0, 0, 0 },
  { "booksubtitle",        0, 0, 0 },

  { "menu",                1, 0, 0 },
  { "detailmenu",          1, 0, 0 },
  { "menuentry",           0, 0, 0 },
  { "menutitle",           0, 0, 0 },
  { "menucomment",         0, 0, 0 },
  { "menunode",            0, 0, 0 },
  { "nodename",            0, 0, 0 },

  { "acronym",             0, 1, 0 },
  { "acronymword",         0, 1, 0 },
  { "acronymdesc",         0, 1, 0 },

  { "abbrev",              0, 1, 0 },
  { "abbrevword",          0, 1, 0 },
  { "abbrevdesc",          0, 1, 0 },

  { "tt",                  0, 1, 0 },
  { "code",                0, 1, 0 },
  { "command",             0, 1, 0 },
  { "env",                 0, 1, 0 },
  { "file",                0, 1, 0 },
  { "option",              0, 1, 0 },
  { "samp",                0, 1, 0 },
  { "kbd",                 0, 1, 0 },
  { "url",                 0, 1, 0 },
  { "key",                 0, 1, 0 },
  { "var",                 0, 1, 0 },
  { "sc",                  0, 1, 0 },
  { "dfn",                 0, 1, 0 },
  { "emph",                0, 1, 0 },
  { "strong",              0, 1, 0 },
  { "cite",                0, 1, 0 },
  { "notfixedwidth",       0, 1, 0 },
  { "i",                   0, 1, 0 },
  { "b",                   0, 1, 0 },
  { "r",                   0, 1, 0 },
  { "slanted",             0, 1, 0 },
  { "sansserif",           0, 1, 0 },

  { "exdent",              0, 0, 0 },

  { "title",               0, 0, 0 },
  { "ifinfo",              1, 0, 0 },
  { "sp",                  0, 0, 0 },
  { "center",              1, 0, 0 },
  { "dircategory",         0, 0, 0 },
  { "quotation",           1, 0, 0 },
  { "example",             0, 0, 1 },
  { "smallexample",        0, 0, 1 },
  { "lisp",                0, 0, 1 },
  { "smalllisp",           0, 0, 1 },
  { "cartouche",           1, 0, 0 },
  { "copying",             1, 0, 0 },
  { "format",              0, 0, 1 },
  { "smallformat",         0, 0, 1 },
  { "display",             0, 0, 1 },
  { "smalldisplay",        0, 0, 1 },
  { "verbatim",            0, 0, 1 },
  { "footnote",            0, 1, 0 },
  { "",                    0, 1, 0 }, /* LINEANNOTATION (docbook) */

  { "",                    1, 0, 0 }, /* TIP (docbook)       */
  { "",                    1, 0, 0 }, /* NOTE (docbook)      */
  { "",                    1, 0, 0 }, /* IMPORTANT (docbook) */
  { "",                    1, 0, 0 }, /* WARNING (docbook)   */
  { "",                    1, 0, 0 }, /* CAUTION (docbook)   */

  { "itemize",             0, 0, 0 },
  { "itemfunction",        0, 0, 0 },
  { "item",                1, 0, 0 },
  { "enumerate",           0, 0, 0 },
  { "table",               0, 0, 0 },
  { "tableitem",           0, 0, 0 },
  { "tableterm",           0, 0, 0 },

  { "indexterm",           0, 1, 0 },

  { "math",                0, 1, 0 },

  { "dmn",                 0, 1, 0 },

  { "clicksequence",       0, 1, 0 },
  { "click",               0, 1, 0 },

  { "xref",                0, 1, 0 },
  { "xrefnodename",        0, 1, 0 },
  { "xrefinfoname",        0, 1, 0 },
  { "xrefprinteddesc",     0, 1, 0 },
  { "xrefinfofile",        0, 1, 0 },
  { "xrefprintedname",     0, 1, 0 },

  { "inforef",             0, 1, 0 },
  { "inforefnodename",     0, 1, 0 },
  { "inforefrefname",      0, 1, 0 },
  { "inforefinfoname",     0, 1, 0 },

  { "uref",                0, 1, 0 },
  { "urefurl",             0, 1, 0 },
  { "urefdesc",            0, 1, 0 },
  { "urefreplacement",     0, 1, 0 },

  { "email",               0, 1, 0 },
  { "emailaddress",        0, 1, 0 },
  { "emailname",           0, 1, 0 },

  { "group",               0, 0, 0 },
  { "float",               1, 0, 0 },
  { "floattype",           0, 0, 0 },
  { "floatpos",            0, 0, 0 },
  { "caption",             0, 0, 0 },
  { "shortcaption",        0, 0, 0 },

  { "",                    0, 0, 0 }, /* TABLE (docbook) */
  { "",                    0, 0, 0 }, /* FIGURE (docbook) */
  { "",                    0, 0, 0 }, /* EXAMPLE (docbook) */
  { "",                    1, 0, 0 }, /* SIDEBAR (docbook) */

  { "printindex",          0, 0, 0 },
  { "listoffloats",        0, 0, 0 },
  { "anchor",              0, 1, 0 },

  { "image",               0, 0, 0 },
  { "inlineimage",         0, 1, 0 },
  { "alttext",             0, 1, 0 },

  { "",                    0, 1, 0 }, /* PRIMARY (docbook) */
  { "",                    0, 1, 0 }, /* SECONDARY (docbook) */
  { "",                    0, 0, 0 }, /* INFORMALFIGURE (docbook) */
  { "",                    0, 0, 0 }, /* MEDIAOBJECT (docbook) */
  { "",                    0, 0, 0 }, /* IMAGEOBJECT (docbook) */
  { "",                    0, 0, 0 }, /* IMAGEDATA (docbook) */
  { "",                    0, 0, 0 }, /* TEXTOBJECT (docbook) */
  { "",                    0, 0, 0 }, /* INDEXENTRY (docbook) */
  { "",                    0, 0, 0 }, /* PRIMARYIE (docbook) */
  { "",                    0, 0, 0 }, /* SECONDARYIE (docbook) */
  { "",                    0, 0, 0 }, /* INDEXDIV (docbook) */
  { "multitable",          0, 0, 0 },
  { "",                    0, 0, 0 }, /* TGROUP (docbook) */
  { "columnfraction",      0, 0, 0 },
  { "thead",               0, 0, 0 },
  { "tbody",               0, 0, 0 },
  { "entry",               0, 0, 0 },
  { "row",                 0, 0, 0 },
  { "",                    0, 0, 0 }, /* BOOKINFO (docbook) */
  { "",                    0, 0, 0 }, /* ABSTRACT (docbook) */
  { "",                    0, 0, 0 }, /* REPLACEABLE (docbook) */
  { "",                    0, 0, 0 }, /* ENVAR (docbook) */
  { "",                    0, 0, 0 }, /* COMMENT (docbook) */
  { "",                    0, 0, 0 }, /* FUNCTION (docbook) */
  { "",                    0, 0, 0 }, /* LEGALNOTICE (docbook) */

  { "contents",            0, 0, 0 },
  { "shortcontents",       0, 0, 0 },
  { "documentlanguage",    0, 0, 0 },

  { "setvalue",            0, 0, 0 },
  { "clearvalue",          0, 0, 0 },

  { "definition",          0, 0, 0 },
  { "definitionterm",      0, 0, 0 },
  { "definitionitem",      1, 0, 0 },
  { "defcategory",         0, 0, 0 },
  { "deffunction",         0, 0, 0 },
  { "defvariable",         0, 0, 0 },
  { "defparam",            0, 0, 0 },
  { "defdelimiter",        0, 0, 0 },
  { "deftype",             0, 0, 0 },
  { "defparamtype",        0, 0, 0 },
  { "defdatatype",         0, 0, 0 },
  { "defclass",            0, 0, 0 },
  { "defclassvar",         0, 0, 0 },
  { "defoperation",        0, 0, 0 },
  { "frenchspacing",       0, 0, 0 },

  { "para",                0, 0, 0 } /* Must be last */
  /* name / contains para / contained in para / preserve space */
};

element docbook_element_list [] = {
  { "book",                0, 0, 0 }, /* TEXINFO */
  { "",                    0, 0, 0 }, /* SETFILENAME */
  { "",                    0, 0, 0 }, /* TITLEINFO */
  { "title",               0, 0, 0 }, /* SETTITLE */
  { "",                    1, 0, 0 }, /* DOCUMENTDESCRIPTION (?) */

  { "",                    1, 0, 0 }, /* NODE */
  { "",                    0, 0, 0 }, /* NODENEXT */
  { "",                    0, 0, 0 }, /* NODEPREV */
  { "",                    0, 0, 0 }, /* NODEUP */

  { "chapter",             1, 0, 0 },
  { "sect1",               1, 0, 0 }, /* SECTION */
  { "sect2",               1, 0, 0 }, /* SUBSECTION */
  { "sect3",               1, 0, 0 }, /* SUBSUBSECTION */

  { "chapter",             1, 0, 0 }, /* TOP */
  { "chapter",             1, 0, 0 }, /* UNNUMBERED */
  { "sect1",               1, 0, 0 }, /* UNNUMBEREDSEC */
  { "sect2",               1, 0, 0 }, /* UNNUMBEREDSUBSEC */
  { "sect3",               1, 0, 0 }, /* UNNUMBEREDSUBSUBSEC */

  { "appendix",            1, 0, 0 },
  { "sect1",               1, 0, 0 }, /* APPENDIXSEC */
  { "sect2",               1, 0, 0 }, /* APPENDIXSUBSEC */
  { "sect3",               1, 0, 0 }, /* APPENDIXSUBSUBSEC */

  { "bridgehead",          0, 0, 0 }, /* MAJORHEADING */
  { "bridgehead",          0, 0, 0 }, /* CHAPHEADING */
  { "bridgehead",          0, 0, 0 }, /* HEADING */
  { "bridgehead",          0, 0, 0 }, /* SUBHEADING */
  { "bridgehead",          0, 0, 0 }, /* SUBSUBHEADING */

  { "",                    0, 0, 0 }, /* TITLEPAGE */
  { "",                    0, 0, 0 }, /* AUTHOR */
  { "",                    0, 0, 0 }, /* BOOKTITLE */
  { "",                    0, 0, 0 }, /* BOOKSUBTITLE */

  { "",                    1, 0, 0 }, /* MENU */
  { "",                    1, 0, 0 }, /* DETAILMENU */
  { "",                    1, 0, 0 }, /* MENUENTRY */
  { "",                    0, 0, 0 }, /* MENUTITLE */
  { "",                    1, 0, 0 }, /* MENUCOMMENT */
  { "",                    0, 0, 0 }, /* MENUNODE */
  { "anchor",              0, 0, 0 }, /* NODENAME */

  { "acronym",             0, 1, 0 },
  { "",                    0, 1, 0 }, /* ACRONYMWORD */
  { "",                    0, 1, 0 }, /* ACRONYMDESC */

  { "abbrev",              0, 1, 0 },
  { "",                    0, 1, 0 }, /* ABBREVWORD */
  { "",                    0, 1, 0 }, /* ABBREVDESC */

  { "literal",             0, 1, 0 }, /* TT */
  { "literal",             0, 1, 0 }, /* CODE */
  { "command",             0, 1, 0 }, /* COMMAND */
  { "envar",               0, 1, 0 }, /* ENV */
  { "filename",            0, 1, 0 }, /* FILE */
  { "option",              0, 1, 0 }, /* OPTION */
  { "literal",             0, 1, 0 }, /* SAMP */
  { "userinput",           0, 1, 0 }, /* KBD */
  { "wordasword",          0, 1, 0 }, /* URL */
  { "keycap",              0, 1, 0 }, /* KEY */
  { "replaceable",         0, 1, 0 }, /* VAR */
  { "",                    0, 1, 0 }, /* SC */
  { "firstterm",           0, 1, 0 }, /* DFN */
  { "emphasis",            0, 1, 0 }, /* EMPH */
  { "emphasis",            0, 1, 0 }, /* STRONG */
  { "citetitle",           0, 1, 0 }, /* CITE */
  { "",                    0, 1, 0 }, /* NOTFIXEDWIDTH */
  { "wordasword",          0, 1, 0 }, /* I */
  { "emphasis",            0, 1, 0 }, /* B */
  { "",                    0, 1, 0 }, /* R */
  { "",                    0, 1, 0 }, /* SLANTED */
  { "",                    0, 1, 0 }, /* SANSSERIF */

  { "",                    0, 0, 0 }, /* EXDENT */

  { "title",               0, 0, 0 },
  { "",                    1, 0, 0 }, /* IFINFO */
  { "",                    0, 0, 0 }, /* SP */
  { "",                    1, 0, 0 }, /* CENTER */
  { "",                    0, 0, 0 }, /* DIRCATEGORY */
  { "blockquote",          1, 0, 0 }, /* QUOTATION */
  { "screen",              0, 0, 1 }, /* EXAMPLE */
  { "screen",              0, 0, 1 }, /* SMALLEXAMPLE */
  { "programlisting",      0, 0, 1 }, /* LISP */
  { "programlisting",      0, 0, 1 }, /* SMALLLISP */
  { "",                    1, 0, 0 }, /* CARTOUCHE */
  { "",                    1, 0, 0 }, /* COPYING */
  { "screen",              0, 1, 1 }, /* FORMAT */
  { "screen",              0, 1, 1 }, /* SMALLFORMAT */
  { "literallayout",       0, 1, 1 }, /* DISPLAY */
  { "literallayout",       0, 1, 1 }, /* SMALLDISPLAY */
  { "screen",              0, 0, 1 }, /* VERBATIM */
  { "footnote",            0, 1, 0 },
  { "lineannotation",      0, 1, 0 },

  { "tip",                 1, 0, 0 },
  { "note",                1, 0, 0 },
  { "important",           1, 0, 0 },
  { "warning",             1, 0, 0 },
  { "caution",             1, 0, 0 },

  { "itemizedlist",        0, 0, 0 }, /* ITEMIZE */
  { "",                    0, 0, 0 }, /* ITEMFUNCTION */
  { "listitem",            1, 0, 0 }, /* ITEM */
  { "orderedlist",         0, 0, 0 }, /* ENUMERATE */
  { "variablelist",        0, 0, 0 }, /* TABLE */
  { "varlistentry",        0, 0, 0 }, /* TABLEITEM */
  { "term",                0, 0, 0 }, /* TABLETERM */

  { "indexterm",           0, 1, 0 }, /* INDEXTERM */

  { "",                    0, 1, 0 }, /* MATH */

  { "",                    0, 1, 0 }, /* DIMENSION */

  { "",                    0, 1, 0 }, /* CLICKSEQUENCE */
  { "",                    0, 1, 0 }, /* CLICK */

  { "xref",                0, 1, 0 }, /* XREF */
  { "link",                0, 1, 0 }, /* XREFNODENAME */
  { "",                    0, 1, 0 }, /* XREFINFONAME */
  { "",                    0, 1, 0 }, /* XREFPRINTEDDESC */
  { "",                    0, 1, 0 }, /* XREFINFOFILE */
  { "",                    0, 1, 0 }, /* XREFPRINTEDNAME */

  { "",                    0, 1, 0 }, /* INFOREF */
  { "",                    0, 1, 0 }, /* INFOREFNODENAME */
  { "",                    0, 1, 0 }, /* INFOREFREFNAME */
  { "",                    0, 1, 0 }, /* INFOREFINFONAME */

  { "ulink",               0, 1, 0 }, /* UREF */
  { "",                    0, 1, 0 }, /* UREFURL */
  { "",                    0, 1, 0 }, /* UREFDESC */
  { "",                    0, 1, 0 }, /* UREFREPLACEMENT */

  { "ulink",               0, 1, 0 }, /* EMAIL */
  { "email",               0, 1, 0 }, /* EMAILADDRESS */
  { "",                    0, 1, 0 }, /* EMAILNAME */

  { "",                    0, 0, 0 }, /* GROUP */
  { "",                    1, 0, 0 }, /* FLOAT */
  { "",                    0, 0, 0 }, /* FLOATTYPE */
  { "",                    0, 0, 0 }, /* FLOATPOS */
  { "",                    0, 0, 0 }, /* CAPTION */
  { "",                    0, 0, 0 }, /* SHORTCAPTION */

  { "table",               0, 1, 0 },
  { "figure",              0, 1, 0 },
  { "example",             1, 1, 0 },
  { "sidebar",             1, 0, 0 },

  { "index",               0, 0, 0 }, /* PRINTINDEX */
  { "",                    0, 1, 0 }, /* LISTOFFLOATS */
  { "anchor",              0, 1, 0 }, /* ANCHOR */

  { "",                    0, 0, 0 }, /* IMAGE */
  { "inlinemediaobject",   0, 1, 0 }, /* INLINEIMAGE */
  { "",                    0, 0, 0 }, /* IMAGEALTTEXT */

  { "primary",             0, 1, 0 }, /* PRIMARY */
  { "secondary",           0, 1, 0 },
  { "informalfigure",      0, 0, 0 },
  { "mediaobject",         0, 0, 0 },
  { "imageobject",         0, 1, 0 },
  { "imagedata",           0, 1, 0 },
  { "textobject",          0, 1, 0 },
  { "indexentry",          0, 0, 0 },
  { "primaryie",           0, 0, 0 },
  { "secondaryie",         0, 0, 0 },
  { "indexdiv",            0, 0, 0 },
  { "informaltable",       0, 0, 0 },
  { "tgroup",              0, 0, 0 },
  { "colspec",             0, 0, 0 },
  { "thead",               0, 0, 0 },
  { "tbody",               0, 0, 0 },
  { "entry",               0, 0, 0 },
  { "row",                 0, 0, 0 },
  { "bookinfo",            0, 0, 0 },
  { "abstract",            1, 0, 0 },
  { "replaceable",         0, 0, 0 },
  { "envar",               0, 1, 0 },
  { "comment",             0, 0, 0 },
  { "function",            0, 1, 0 },
  { "legalnotice",         1, 0, 0 },

  { "",                    0, 0, 0 }, /* CONTENTS (xml) */
  { "",                    0, 0, 0 }, /* SHORTCONTENTS (xml) */
  { "",                    0, 0, 0 }, /* DOCUMENT LANGUAGE (xml) */

  { "",                    0, 0, 0 }, /* SETVALUE (xml) */
  { "",                    0, 0, 0 }, /* CLEARVALUE (xml) */

  { "informalfigure",      1, 0, 0 }, /* DEFINITION */
  { "synopsis",            0, 0, 1 }, /* DEFINITIONTERM */
  { "blockquote",          1, 0, 0 }, /* DEFINITIONITEM (xml) */
  { "",                    0, 0, 0 }, /* DEFCATEGORY (xml) */
  { "function",            0, 0, 0 }, /* DEFFUNCTION */
  { "varname",             0, 0, 0 }, /* DEFVARIABLE */
  { "replaceable",         0, 0, 0 }, /* DEFPARAM */
  { "",                    0, 0, 0 }, /* DEFDELIMITER (xml) */
  { "returnvalue",         0, 0, 0 }, /* DEFTYPE */
  { "type",                0, 0, 0 }, /* DEFPARAMTYPE */
  { "structname",          0, 0, 0 }, /* DEFDATATYPE */
  { "classname",           0, 0, 0 }, /* DEFCLASS */
  { "property",            0, 0, 0 }, /* DEFCLASSVAR */
  { "methodname",          0, 0, 0 }, /* DEFOPERATION */
  { "",                    0, 0, 0 }, /* FRENCHSPACING */

  { "para",                0, 0, 0 } /* Must be last */
  /* name / contains para / contained in para / preserve space */
};

element *xml_element_list = NULL;


typedef struct _replace_element
{
  int element_to_replace;
  int element_containing;
  int element_replacing;
} replace_element;

/* Elements to replace - Docbook only
   -------------------
   if `element_to_replace' have to be inserted
   as a child of `element_containing,'
   use `element_replacing' instead.

   A value of `-1' for element_replacing means `do not use any element.'
*/

replace_element replace_elements [] = {
  { I, TABLETERM, EMPH },
  { B, TABLETERM, EMPH },
  { TT, CODE, -1 },
  { EXAMPLE, DISPLAY, -1 },
  { CODE, DFN, -1 },
  { CODE, VAR, -1 },
  { EMPH, CODE, REPLACEABLE },
  { VAR, VAR, -1},
  { VAR, B, EMPH},
  { B, CODE, ENVAR},
  { CODE, I, EMPH},
  { SAMP, VAR, -1 },
  { FORMAT, BOOKINFO, ABSTRACT },
  { QUOTATION, ABSTRACT, -1},
  { LINEANNOTATION, LINEANNOTATION, -1 },
  { LEGALNOTICE, ABSTRACT, -1 },
  { QUOTATION, QUOTATION, -1 },
  /* Formal versions of table and image elements.  */
  { MULTITABLE, FLOAT, FLOATTABLE },
  { INFORMALFIGURE, FLOAT, FLOATFIGURE },
  { CARTOUCHE, FLOAT, FLOATCARTOUCHE },
  /* Unnecessary markup in @defun blocks.  */
  { VAR, DEFPARAM, -1 },
  { CODE, DEFTYPE, -1 },
  /* Add your elements to replace here */
  {-1, 0, 0}
};

int xml_in_menu_entry = 0;
int xml_in_menu_entry_comment = 0;
int xml_node_open = 0;
int xml_node_level = -1;
int xml_in_para = 0;
int xml_just_after_element = 0;
int xml_keep_space = 0;

int xml_no_indent = 0;

int xml_no_para = 0;
char *xml_node_id = NULL;

/* Currently sorting the index. */
int xml_sort_index = 0;

int xml_in_xref_token = 0;
int xml_in_bookinfo = 0;
int xml_in_book_title = 0;
int xml_in_abstract = 0;

/* Non-zero if we are handling an element that can appear between
   @item and @itemx, @deffn and @deffnx.  */
int xml_dont_touch_items_defs = 0;

/* We need to keep footnote state, because elements inside footnote may try
   to close the previous parent para.  */
static int xml_in_footnote = 0;

static int xml_after_table_term = 0;
static int book_started = 0;
static int first_section_opened = 0;

static int xml_in_tableitem[256];
static int xml_in_item[256];
static int xml_table_level = 0;

static int xml_in_def_item[256];
static int xml_definition_level = 0;
int xml_after_def_term = 0;

static int in_table_title = 0;

static int in_indexentry = 0;
static int in_secondary = 0;
static int in_indexterm = 0;

/* Technically there are certain Unicode characters which cannot
   appear.  Trying to implement the real rules would lead to deep
   waters.  So essentially just pass along what we are given.  Some
   references:
   http://www.w3.org/TR/xml-id/ 
   -> http://www.w3.org/TR/xml-names11/#NT-NCName
   -> http://www.w3.org/TR/xml11/#NT-NameChar
*/

char *
xml_id (char *id)
{
  char *tem = xmalloc (strlen (id) + 1);
  char *p = tem;
  strcpy (tem, id);
  while (*p)
    {
      if (strchr (":\" \t\f\r\n", *p))
        *p = '-';
      p++;
    }
  p = tem;

  /* First character cannot be a number.  Clearly we should make this
     dependent on the actual numeral found.  */
  if (strchr ("0123456789", *p))
    *p = 'i';

  return tem;
}

int
xml_element (char *name)
{
  int i;
  for (i = 0; i<=PARA; i++)
    {
      if (mbscasecmp (name, texinfoml_element_list[i].name) == 0)
        return i;
    }
  printf ("Error xml_element\n");
  return -1;
}

void
xml_begin_document (const char *output_basename)
{
  if (book_started)
    return;

  book_started = 1;

  /* Make sure this is the very first string of the output document.  */
  output_paragraph_offset = 0;

  insert_string ("<?xml version=\"1.0\"");

  /* At this point, we register a delayed writing for document encoding,
     so in the end, proper encoding attribute will be inserted here.
     Since the user is unaware that we are implicitly executing this
     command, we should disable warnings temporarily, in order to avoid
     possible confusion.  (ie. if the output is not seekable,
     register_delayed_write issues a warning.)  */
  {
    extern int print_warnings;
    int save_print_warnings = print_warnings;
    print_warnings = 0;
    register_delayed_write ("@documentencoding");
    print_warnings = save_print_warnings;
  }

  insert_string ("?>\n");

  if (docbook)
    {
      insert_string ("<!DOCTYPE book PUBLIC \"-//OASIS//DTD DocBook XML V4.2//EN\" \"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd\" [\n  <!ENTITY tex \"TeX\">\n  <!ENTITY latex \"LaTeX\">\n]>");
      xml_element_list = docbook_element_list;
    }
  else
    {
      insert_string ("<!DOCTYPE texinfo PUBLIC \"-//GNU//DTD TexinfoML V");
      insert_string (VERSION);
      insert_string ("//EN\" \"http://www.gnu.org/software/texinfo/dtd/");
      insert_string (VERSION);
      insert_string ("/texinfo.dtd\">");
      xml_element_list = texinfoml_element_list;
    }

  if (strcmp (xml_element_list[PARA].name, "para"))
    {
      warning ("internal error: xml_element_list table inconsistent");
      xexit (-1);
    }

  if (language_code != last_language_code)
    {
      if (docbook)
	/* The toplevel <book> element needs an id attribute if you want
           to use the chunk.xml feature of the Docbook-XSL stylesheets.
           Might as well use the output filename?  */
        xml_insert_element_with_attribute (TEXINFO, START,
                                           "id=\"%s\" lang=\"%s\"",
                                         output_basename,
                                         language_table[language_code].abbrev);
      else
	xml_insert_element_with_attribute (TEXINFO, START,
                                           "xml:lang=\"%s\"",
                                         language_table[language_code].abbrev);
    }
  if (!docbook)
    {
      xml_insert_element (SETFILENAME, START);
      insert_string (output_basename);
      xml_insert_element (SETFILENAME, END);
    }
}

/*  */
static int element_stack[256];
static int element_stack_index = 0;

static int
xml_current_element (void)
{
  assert (element_stack_index > 0);
  return element_stack[element_stack_index-1];
}

static void
xml_push_current_element (int elt)
{
  element_stack[element_stack_index++] = elt;
  if (element_stack_index > 200)  /* fixxme, no hard limits */
    warning ("internal error: xml stack overflow (%d - %s)",
             element_stack_index, xml_element_list[elt].name);
}

static void
xml_pop_current_element (void)
{
  element_stack_index--;
  if (element_stack_index < 0)
    {
      warning ("internal error: xml stack underflow (index %d)",
               element_stack_index);
      element_stack_index = 0;
    }
}

int
xml_current_stack_index (void)
{
  return element_stack_index;
}

void
xml_end_current_element (void)
{
  xml_insert_element (xml_current_element (), END);
}

static void
xml_indent (void)
{
  if (xml_indentation_increment > 0)
    {
      int i;
      if (output_paragraph[output_paragraph_offset-1] != '\n')
        insert ('\n');
      for (i = 0; i < element_stack_index * xml_indentation_increment; i++)
        insert (' ');
    }
}

void
xml_start_para (void)
{
  if (xml_in_para || xml_in_footnote
      || !xml_element_list[xml_current_element()].contains_para)
    return;

  while (output_paragraph_offset > 0
	 && output_paragraph[output_paragraph_offset-1] == '\n')
    output_paragraph_offset--;
  xml_indent ();

  insert_string ("<para");
  if (xml_no_indent)
    insert_string (" role=\"continues\"");
  insert_string (">");
  xml_no_indent = 0;
  xml_in_para = 1;
}

void
xml_end_para (void)
{
  if (!xml_in_para || xml_in_footnote)
    return;

  while (output_paragraph_offset > 0
	 && cr_or_whitespace(output_paragraph[output_paragraph_offset-1]))
    output_paragraph_offset--;

  insert_string ("</para>");
  if (xml_indentation_increment > 0)
    insert ('\n');
  xml_in_para = 0;
}

void
xml_end_document (void)
{
  if (xml_node_open)
    {
      if (xml_node_level != -1)
        {
          xml_close_sections (xml_node_level);
          xml_node_level = -1;
        }
      xml_insert_element (NODE, END);
    }
  else
    xml_close_sections (xml_node_level);

  xml_insert_element (TEXINFO, END);
  if (xml_indentation_increment == 0)
    insert ('\n');
  insert_string ("<!-- Keep this comment at the end of the file\n\
Local variables:\n\
mode: sgml\n\
sgml-indent-step:1\n\
sgml-indent-data:nil\n\
End:\n\
-->\n");
  if (element_stack_index != 0)
    error ("Element stack index : %d\n", element_stack_index);
}

/* MUST be 0 or 1, not true or false values */
static int start_element_inserted = 1;

/* NOTE: We use `elt' rather than `element' in the argument list of
   the next function, since otherwise the Solaris SUNWspro compiler
   barfs because `element' is a typedef declared near the beginning of
   this file.  */
void
#if defined (VA_FPRINTF) && __STDC__
xml_insert_element_with_attribute (int elt, int arg, char *format, ...)
#else
xml_insert_element_with_attribute (elt, arg, format, va_alist)
     int elt;
     int arg;
     char *format;
     va_dcl
#endif
{
  /* Look at the replace_elements table to see if we have to change the element */
  if (xml_sort_index)
      return;
  if (docbook && element_stack_index > 0)
    {
      replace_element *element_list = replace_elements;
      while (element_list->element_to_replace >= 0)
        {
          if ( ( (arg == START) &&
                 (element_list->element_containing == xml_current_element ()) &&
                 (element_list->element_to_replace == elt) ) ||
               ( (arg == END) &&
                 (element_list->element_containing == element_stack[element_stack_index-1-start_element_inserted]) &&
                 (element_list->element_to_replace == elt) ) )
            {
              elt = element_list->element_replacing;
              break;
            }
          element_list ++;
        }

      /* Forget the element */
      if (elt < 0)
        {
          if (arg == START)
            start_element_inserted = 0;
          else
            /* Replace the default value, for the next time */
            start_element_inserted = 1;
          return;
        }
    }

  if (!book_started)
    return;

  if (!xml_dont_touch_items_defs && arg == START)
    {
      if (xml_after_table_term && elt != TABLETERM && xml_table_level
          && !xml_in_item[xml_table_level])
        {
          xml_after_table_term = 0;
          xml_insert_element (ITEM, START);
          xml_in_item[xml_table_level] = 1;
        }
      else if (xml_after_def_term && elt != DEFINITIONTERM)
        {
          xml_after_def_term = 0;
          xml_insert_element (DEFINITIONITEM, START);
          xml_in_def_item[xml_definition_level] = 1;
        }
    }

  if (docbook && !only_macro_expansion && (in_menu || in_detailmenu))
    return;

  if (executing_string && arg == END)
    switch (elt)
      {
      case TABLEITEM:
        xml_in_tableitem[xml_table_level] = 0;
        break;
      case ITEM:
        xml_in_item[xml_table_level] = 0;
        break;
      case DEFINITIONTERM:
        xml_in_def_item[xml_definition_level] = 0;
        break;
      }

  /* We are special-casing FIGURE element for docbook.  It does appear in
     the tag stack, but not in the output.  This is to make element replacement
     work beautifully.  */
  if (docbook && elt == FLOAT)
    {
      if (arg == START)
        xml_push_current_element (elt);
      else
        xml_pop_current_element ();
      return;
    }

  if (!xml_element_list[elt].name || !strlen (xml_element_list[elt].name))
    {
      /*printf ("Warning: Inserting empty element %d\n", elt);*/
      return;
    }

  if (arg == START && !xml_in_para && !xml_no_para
      && xml_element_list[elt].contained_in_para)
    xml_start_para ();

  if (arg == START && xml_in_para && !xml_element_list[elt].contained_in_para)
    xml_end_para ();

  if (arg == END && xml_in_para && !xml_element_list[elt].contained_in_para)
    xml_end_para ();

  /* Oddly, we want to do the same thing whether we starting or ending
     the detailmenu -- close any existing menu elements before inserting
     the detailmenu element.  */
  if (elt == DETAILMENU && xml_in_menu_entry)
    {
      if (xml_in_menu_entry_comment)
        {
          xml_insert_element (MENUCOMMENT, END);
          xml_in_menu_entry_comment = 0;
        }
      xml_insert_element (MENUENTRY, END);
      xml_in_menu_entry = 0;
    }
    
  if (docbook && xml_table_level && !in_table_title
      && !xml_in_tableitem[xml_table_level] && !xml_in_item[xml_table_level]
      && arg == START && elt != TABLEITEM && elt != TABLETERM
      && !in_indexterm && xml_current_element() == TABLE)
    {
      in_table_title = 1;
      xml_insert_element (TITLE, START);
    }

  if (arg == START && !xml_in_para && !xml_keep_space
      && !xml_element_list[elt].contained_in_para)
    xml_indent ();

  if (arg == START)
    xml_push_current_element (elt);
  else
    xml_pop_current_element ();

  /* Eat one newline before </example> and the like.  */
  if (!docbook && arg == END
      && (xml_element_list[elt].keep_space || elt == GROUP)
      && output_paragraph_offset > 0
      && output_paragraph[output_paragraph_offset-1] == '\n')
    output_paragraph_offset--;

  /* And eat whitespace before </entry> in @multitables.  */
  if (arg == END && elt == ENTRY)
      while (output_paragraph_offset > 0 &&
	     cr_or_whitespace(output_paragraph[output_paragraph_offset-1]))
        output_paragraph_offset--;

  /* Indent elements that can contain <para>.  */
  if (arg == END && !xml_in_para && !xml_keep_space
      && xml_element_list[elt].contains_para)
    xml_indent ();

  /* Here are the elements we want indented.  These do not contain <para>
     directly.  */
  if (arg == END && (elt == MENUENTRY || elt == ITEMIZE || elt == ENUMERATE
        || elt == TABLEITEM || elt == TABLE
        || elt == MULTITABLE || elt == TGROUP || elt == THEAD || elt == TBODY
        || elt == ROW || elt == INFORMALFIGURE
        || (!docbook && (elt == DEFINITION || elt == DEFINITIONTERM))))
    xml_indent ();

  insert ('<');
  if (arg == END)
    insert ('/');
  insert_string (xml_element_list[elt].name);

  /*  printf ("%s ", xml_element_list[elt].name);*/

  if (format)
    {
      char temp_string[2000]; /* xx no fixed limits */
#ifdef VA_SPRINTF
      va_list ap;
#endif

      VA_START (ap, format);
#ifdef VA_SPRINTF
      VA_SPRINTF (temp_string, format, ap);
#else
      sprintf (temp_string, format, a1, a2, a3, a4, a5, a6, a7, a8);
#endif
      insert (' ');
      insert_string (temp_string);
      va_end (ap);
    }

  if (arg == START && xml_node_id && elt != NODENAME)
    {
      insert_string (" id=\"");
      insert_string (xml_node_id);
      insert ('"');
      free (xml_node_id);
      xml_node_id = NULL;
    }

  if (xml_element_list[elt].keep_space)
    {
      if (arg == START)
	{
          if (!docbook)
            insert_string (" xml:space=\"preserve\"");
	  xml_keep_space++;
	}
      else
	xml_keep_space--;
    }

  insert ('>');

  if (!xml_in_para && !xml_element_list[elt].contained_in_para
      && xml_element_list[elt].contains_para && xml_indentation_increment > 0)
    insert ('\n');

  xml_just_after_element = 1;
}

/* See the NOTE before xml_insert_element_with_attribute, for why we
   use `elt' rather than `element' here.  */
void
xml_insert_element (int elt, int arg)
{
  xml_insert_element_with_attribute (elt, arg, NULL);
}

void
xml_insert_entity (char *entity_name)
{
  int saved_escape_html = escape_html;

  if (xml)
    {
    if (!book_started)
      return;
    if (docbook && !only_macro_expansion && (in_menu || in_detailmenu))
      return;

    if (!xml_in_para && !xml_no_para && !only_macro_expansion
        && xml_element_list[xml_current_element ()].contains_para
        && !in_fixed_width_font)
      xml_start_para ();
  }

  escape_html = 0;
  add_char ('&');
  escape_html = saved_escape_html;
  insert_string (entity_name);
  add_char (';');
}

typedef struct _xml_section xml_section;
struct _xml_section {
  int level;
  char *name;
  xml_section *prev;
};

xml_section *last_section = NULL;

void
xml_begin_node (void)
{
  first_section_opened = 1;
  if (xml_in_abstract)
    {
      xml_insert_element (ABSTRACT, END);
      xml_in_abstract = 0;
    }
  if (xml_in_bookinfo)
    {
      xml_insert_element (BOOKINFO, END);
      xml_in_bookinfo = 0;
    }
  if (xml_node_open && !docbook)
    {
      if (xml_node_level != -1)
        {
          xml_close_sections (xml_node_level);
          xml_node_level = -1;
        }
      xml_insert_element (NODE, END);
    }
  xml_insert_element (NODE, START);
  xml_node_open = 1;
}

void
xml_close_sections (int level)
{
  if (!first_section_opened)
    {
      if (xml_in_abstract)
	{
	  xml_insert_element (ABSTRACT, END);
	  xml_in_abstract = 0;
	}
      if (xml_in_bookinfo)
	{
	  xml_insert_element (BOOKINFO, END);
	  xml_in_bookinfo = 0;
	}
      first_section_opened = 1;
    }

  while (last_section && last_section->level >= level)
    {
      xml_section *temp = last_section;
      xml_insert_element (xml_element(last_section->name), END);
      temp = last_section;
      last_section = last_section->prev;
      free (temp->name);
      free (temp);
    }
}

void
xml_open_section (int level, char *name)
{
  xml_section *sect = (xml_section *) xmalloc (sizeof (xml_section));

  sect->level = level;
  sect->name = xmalloc (1 + strlen (name));
  strcpy (sect->name, name);
  sect->prev = last_section;
  last_section = sect;

  if (xml_node_open && xml_node_level == -1)
    xml_node_level = level;
}

void
xml_start_menu_entry (char *tem)
{
  char *string;
  discard_until ("* ");

  /* The line number was already incremented in reader_loop when we
     saw the newline, and discard_until has now incremented again.  */
  line_number--;

  if (xml_in_menu_entry)
    {
      if (xml_in_menu_entry_comment)
        {
          xml_insert_element (MENUCOMMENT, END);
          xml_in_menu_entry_comment = 0;
        }
      xml_insert_element (MENUENTRY, END);
      xml_in_menu_entry = 0;
    }
  xml_insert_element (MENUENTRY, START);
  xml_in_menu_entry = 1;

  xml_insert_element (MENUNODE, START);
  string = expansion (tem, 0);
  add_word (string);
  xml_insert_element (MENUNODE, END);
  free (string);

  /* The menu item may use macros, so expand them now.  */
  xml_insert_element (MENUTITLE, START);
  only_macro_expansion++;
  get_until_in_line (1, ":", &string);
  only_macro_expansion--;
  execute_string ("%s", string); /* get escaping done */
  xml_insert_element (MENUTITLE, END);
  free (string);

  if (looking_at ("::"))
    discard_until (":");
  else
    { /* discard the node name */
      get_until_in_line (0, ".", &string);
      free (string);
    }
  input_text_offset++;  /* discard the second colon or the period */
  skip_whitespace_and_newlines();
  xml_insert_element (MENUCOMMENT, START);
  xml_in_menu_entry_comment ++;
}

void
xml_end_menu (void)
{
  if (xml_in_menu_entry)
    {
      if (xml_in_menu_entry_comment)
        {
          xml_insert_element (MENUCOMMENT, END);
          xml_in_menu_entry_comment --;
        }
      xml_insert_element (MENUENTRY, END);
      xml_in_menu_entry--;
    }
  xml_insert_element (MENU, END);
}

static int xml_last_character;

void
xml_add_char (int character)
{
  if (!book_started)
      return;
  if (docbook && !only_macro_expansion && (in_menu || in_detailmenu))
    return;

  if (docbook && xml_table_level && !in_table_title
      && !xml_in_item[xml_table_level] && !xml_in_tableitem[xml_table_level]
      && !cr_or_whitespace (character) && !in_indexterm)
    {
      in_table_title = 1;
      xml_insert_element (TITLE, START);
    }

  if (!first_section_opened && !xml_in_abstract && !xml_in_book_title
      && !xml_no_para && character != '\r' && character != '\n'
      && character != ' ' && !is_in_insertion_of_type (copying))
    {
      if (!xml_in_bookinfo)
	{
	  xml_insert_element (BOOKINFO, START);
	  xml_in_bookinfo = 1;
	}
      xml_insert_element (ABSTRACT, START);
      xml_in_abstract = 1;
    }

  if (!xml_sort_index && !xml_in_xref_token && !xml_dont_touch_items_defs)
    {
      if (xml_after_table_term && xml_table_level
          && !xml_in_item[xml_table_level])
        {
          xml_after_table_term = 0;
          xml_insert_element (ITEM, START);
          xml_in_item[xml_table_level] = 1;
        }
      else if (xml_after_def_term)
        {
          xml_after_def_term = 0;
          xml_insert_element (DEFINITIONITEM, START);
          xml_in_def_item[xml_definition_level] = 1;
        }
    }

  if (xml_just_after_element && !xml_in_para && !inhibit_paragraph_indentation)
    {
      if (character == '\r' || character == '\n' || character == '\t' || character == ' ')
        return;
      xml_just_after_element = 0;
    }

  if (element_stack_index > 0
      && xml_element_list[xml_current_element()].contains_para
      && !xml_in_para && !only_macro_expansion && !xml_no_para
      && !cr_or_whitespace (character) && !in_fixed_width_font)
    xml_start_para ();

  if (xml_in_para && character == '\n' && xml_last_character == '\n'
      && !only_macro_expansion && !xml_no_para
      && xml_element_list[xml_current_element()].contains_para )
    {
      xml_end_para ();
      xml_just_after_element = 1;
      return;
    }

  if (xml_in_menu_entry_comment && character == '\n' && xml_last_character == '\n')
    {
      xml_insert_element (MENUCOMMENT, END);
      xml_in_menu_entry_comment = 0;
      xml_insert_element (MENUENTRY, END);
      xml_in_menu_entry = 0;
    }

  if (xml_in_menu_entry_comment && whitespace(character)
      && cr_or_whitespace(xml_last_character))
    return;

  if (character == '\n' && !xml_in_para && !inhibit_paragraph_indentation)
    return;

  xml_last_character = character;

  if (character == '&' && escape_html)
      insert_string ("&amp;");
  else if (character == '<' && escape_html)
      insert_string ("&lt;");
  else if (character == '>' && escape_html)
      insert_string ("&gt;");
  else if (character == '\n' && !xml_keep_space)
    {
      if (!xml_in_para && xml_just_after_element && !multitable_active)
	return;
      else
	insert (docbook ? '\n' : ' ');
    }
  else
    insert (character);

  return;
}

void
xml_insert_footnote (char *note)
{
  if (!xml_in_para)
    xml_start_para ();

  xml_in_footnote = 1;
  xml_insert_element (FOOTNOTE, START);
  insert_string ("<para>");
  execute_string ("%s", note);
  insert_string ("</para>");
  xml_insert_element (FOOTNOTE, END);
  xml_in_footnote = 0;
}

/* We need to keep the quotation stack ourself, because insertion_stack
   loses item_function when we are closing the block, so we don't know
   what to close then.  */
typedef struct quotation_elt
{
  struct quotation_elt *next;
  char *type;
} QUOTATION_ELT;

static QUOTATION_ELT *quotation_stack = NULL;

void
xml_insert_quotation (char *type, int arg)
{
  int quotation_started = 0;

  if (arg == START)
    {
      QUOTATION_ELT *new = xmalloc (sizeof (QUOTATION_ELT));
      new->type = xstrdup (type);
      new->next = quotation_stack;
      quotation_stack = new;
    }
  else
    type = quotation_stack->type;

  /* Make use of special quotation styles of Docbook if we can.  */
  if (docbook && strlen (type))
    {
      /* Let's assume it started.  */
      quotation_started = 1;

      if (mbscasecmp (type, "tip") == 0)
        xml_insert_element (TIP, arg);
      else if (mbscasecmp (type, "note") == 0)
        xml_insert_element (NOTE, arg);
      else if (mbscasecmp (type, "important") == 0)
        xml_insert_element (IMPORTANT, arg);
      else if (mbscasecmp (type, "warning") == 0)
        xml_insert_element (WARNING, arg);
      else if (mbscasecmp (type, "caution") == 0)
        xml_insert_element (CAUTION, arg);
      else
        /* Didn't find a known quotation type :\ */
        quotation_started = 0;
    }

  if (!quotation_started)
    {
      xml_insert_element (QUOTATION, arg);
      if (strlen(type) && arg == START)
        execute_string ("@b{%s:} ", type);
    }

  if (arg == END)
    {
      QUOTATION_ELT *temp = quotation_stack;
      if (temp == NULL)
        return;
      quotation_stack = quotation_stack->next;
      free(temp->type);
      free(temp);
    }
}

/* Starting generic docbook floats.  Just starts elt with correct label
   and id attributes, and inserts title.  */
void
xml_begin_docbook_float (int elt)
{
  if (current_float_used_title ())	/* in a nested float */
    {
      xml_insert_element (elt, START);	/* just insert the tag */
      return;
    }


  /* OK, need the title, tag, etc. */
  if (elt == CARTOUCHE)    /* no labels on <sidebar> */
    {
       if (strlen (current_float_id ()) == 0)
          xml_insert_element (elt, START);
       else
          xml_insert_element_with_attribute (elt, START,
              "id=\"%s\"", xml_id (current_float_id ()));
    }
  else if (strlen (current_float_id ()) == 0)
    xml_insert_element_with_attribute (elt, START, "label=\"\"");
  else
    xml_insert_element_with_attribute (elt, START,
        "id=\"%s\" label=\"%s\"", xml_id (current_float_id ()),
        current_float_number ());

  xml_insert_element (TITLE, START);
  execute_string ("%s", current_float_title ());
  xml_insert_element (TITLE, END);

  current_float_set_title_used ();	/* mark this title, tag, etc used */
}

/*
 * Lists and Tables
 */
void
xml_begin_table (int type, char *item_function)
{
  switch (type)
    {
    case ftable:
    case vtable:
    case table:
      /*if (docbook)*/ /* 05-08 */
        {
          xml_insert_element (TABLE, START);
          xml_table_level ++;
          xml_in_tableitem[xml_table_level] = 0;
          xml_in_item[xml_table_level] = 0;
          xml_after_table_term = 0;
        }
      break;
    case itemize:
      if (!docbook || item_function==default_item_function)
	xml_insert_element (ITEMIZE, START);
      else
	xml_insert_element_with_attribute (ITEMIZE, START,
					   "mark=\"%s\"",
					   (*item_function == COMMAND_PREFIX) ?
					   &item_function[1] : item_function);
      xml_table_level ++;
      xml_in_item[xml_table_level] = 0;
      if (!docbook)
        {
          xml_insert_element (ITEMFUNCTION, START);
          if (*item_function == COMMAND_PREFIX
              && item_function[strlen (item_function) - 1] != '}'
              && command_needs_braces (item_function + 1))
            execute_string ("%s{}", item_function);
          else
            execute_string ("%s", item_function);
          xml_insert_element (ITEMFUNCTION, END);
        }
      break;
    }
}

void
xml_end_table (int type)
{
  switch (type)
    {
    case ftable:
    case vtable:
    case table:
      if (xml_in_item[xml_table_level])
        {
          xml_insert_element (ITEM, END);
          xml_in_item[xml_table_level] = 0;
        }
      if (xml_in_tableitem[xml_table_level])
        {
          xml_insert_element (TABLEITEM, END);
          xml_in_tableitem[xml_table_level] = 0;
        }
      xml_insert_element (TABLE, END);
      xml_after_table_term = 0;
      xml_table_level --;

      break;
    case itemize:
      if (xml_in_item[xml_table_level])
        {
          xml_insert_element (ITEM, END);
          xml_in_item[xml_table_level] = 0;
        }
      /* gnat-style manual contains an itemized list without items! */
      if (in_table_title)
	{
	  xml_insert_element (TITLE, END);
	  in_table_title = 0;
	}
      xml_insert_element (ITEMIZE, END);
      xml_table_level --;
      break;
    }
}

void
xml_begin_item (void)
{
  if (xml_in_item[xml_table_level])
    xml_insert_element (ITEM, END);

  xml_insert_element (ITEM, START);
  xml_in_item[xml_table_level] = 1;
}

void
xml_begin_table_item (void)
{
  if (!xml_after_table_term)
    {
      if (xml_in_item[xml_table_level])
        xml_insert_element (ITEM, END);
      if (xml_in_tableitem[xml_table_level])
        xml_insert_element (TABLEITEM, END);

      if (in_table_title)
	{
	  in_table_title = 0;
	  xml_insert_element (TITLE, END);
	}
      xml_insert_element (TABLEITEM, START);
    }
  xml_insert_element (TABLETERM, START);
  xml_in_tableitem[xml_table_level] = 1;
  xml_in_item[xml_table_level] = 0;
  xml_after_table_term = 0;
}

void
xml_continue_table_item (void)
{
  xml_insert_element (TABLETERM, END);
  xml_after_table_term = 1;
  xml_in_item[xml_table_level] = 0;
}

void
xml_begin_enumerate (char *enum_arg)
{
  if (!docbook)
    xml_insert_element_with_attribute (ENUMERATE, START, "first=\"%s\"", enum_arg);
  else
    {
      if (isdigit (*enum_arg))
        {
          int enum_val = atoi (enum_arg);

          /* Have to check the value, not just the first digit.  */
          if (enum_val == 0)
            xml_insert_element_with_attribute (ENUMERATE, START,
                "numeration=\"arabic\" role=\"0\"", NULL);
          else if (enum_val == 1)
            xml_insert_element_with_attribute (ENUMERATE, START,
                "numeration=\"arabic\"", NULL);
          else
            xml_insert_element_with_attribute (ENUMERATE, START,
                "continuation=\"continues\" numeration=\"arabic\"", NULL);
        }
      else if (isupper (*enum_arg))
        {
          if (enum_arg[0] == 'A')
            xml_insert_element_with_attribute (ENUMERATE, START,
                "numeration=\"upperalpha\"", NULL);
          else
            xml_insert_element_with_attribute (ENUMERATE, START,
                "continuation=\"continues\" numeration=\"upperalpha\"", NULL);
        }
      else
        {
          if (enum_arg[0] == 'a')
            xml_insert_element_with_attribute (ENUMERATE, START,
                "numeration=\"loweralpha\"", NULL);
          else
            xml_insert_element_with_attribute (ENUMERATE, START,
                "continuation=\"continues\" numeration=\"loweralpha\"", NULL);
        }
    }
  xml_table_level ++;
  xml_in_item[xml_table_level] = 0;
}

void
xml_end_enumerate (void)
{
  if (xml_in_item[xml_table_level])
    {
      xml_insert_element (ITEM, END);
      xml_in_item[xml_table_level] = 0;
    }
  xml_insert_element (ENUMERATE, END);
  xml_table_level --;
}

static void
xml_insert_text_file (char *name_arg)
{
  char *fullname = xmalloc (strlen (name_arg) + 4 + 1);
  FILE *image_file;
  strcpy (fullname, name_arg);
  strcat (fullname, ".txt");
  image_file = fopen (fullname, "r");
  if (image_file)
    {
      int ch;
      int save_inhibit_indentation = inhibit_paragraph_indentation;
      int save_filling_enabled = filling_enabled;

      xml_insert_element (TEXTOBJECT, START);
      xml_insert_element (DISPLAY, START);

      inhibit_paragraph_indentation = 1;
      filling_enabled = 0;
      last_char_was_newline = 0;

      /* Maybe we need to remove the final newline if the image
         file is only one line to allow in-line images.  On the
         other hand, they could just make the file without a
         final newline.  */
      while ((ch = getc (image_file)) != EOF)
        add_char (ch);

      inhibit_paragraph_indentation = save_inhibit_indentation;
      filling_enabled = save_filling_enabled;

      xml_insert_element (DISPLAY, END);
      xml_insert_element (TEXTOBJECT, END);

      if (fclose (image_file) != 0)
        perror (fullname);
    }
  else
    warning (_("@image file `%s' unreadable: %s"), fullname,
             strerror (errno));

  free (fullname);
}

/* If NAME.EXT is accessible or FORCE is nonzero, insert a docbook
   imagedata element for FMT.  Return 1 if inserted something, 0 else.  */

static int
try_docbook_image (const char *name, const char *ext, const char *fmt,
                   int force)
{
  int used = 0;
  char *fullname = xmalloc (strlen (name) + 1 + strlen (ext) + 1);
  sprintf (fullname, "%s.%s", name, ext);

  if (force || access (fullname, R_OK) == 0)
   {
     xml_insert_element (IMAGEOBJECT, START);
     xml_insert_element_with_attribute (IMAGEDATA, START,
       "fileref=\"%s\" format=\"%s\"", fullname, fmt);
     xml_insert_element (IMAGEDATA, END);
     xml_insert_element (IMAGEOBJECT, END);
     used = 1;
   }
 
 free (fullname);
 return used;
}


void
xml_insert_docbook_image (char *name_arg)
{
  int found = 0;
  int elt = xml_in_para ? INLINEIMAGE : MEDIAOBJECT;

  if (is_in_insertion_of_type (floatenv))
    xml_begin_docbook_float (INFORMALFIGURE);
  else if (!xml_in_para)
    xml_insert_element (INFORMALFIGURE, START);

  xml_no_para++;

  xml_insert_element (elt, START);

  /* A selected few from http://docbook.org/tdg/en/html/imagedata.html.  */
  if (try_docbook_image (name_arg, "eps", "EPS", 0))
    found++;
  if (try_docbook_image (name_arg, "gif", "GIF", 0))
    found++;
  if (try_docbook_image (name_arg, "jpg", "JPG", 0))
    found++;
  if (try_docbook_image (name_arg, "jpeg", "JPEG", 0))
    found++;
  if (try_docbook_image (name_arg, "pdf", "PDF", 0))
    found++;
  if (try_docbook_image (name_arg, "png", "PNG", 0))
    found++;
  if (try_docbook_image (name_arg, "svg", "SVG", 0))
    found++;

  /* If no luck so far, just assume we'll eventually have a jpg.  */
  if (!found)
    try_docbook_image (name_arg, "jpg", "JPG", 1);
 
  xml_insert_text_file (name_arg);
  xml_insert_element (elt, END);

  xml_no_para--;

  if (elt == MEDIAOBJECT)
    xml_insert_element (INFORMALFIGURE, END);
}

void
xml_asterisk (void)
{
}


/*
 *     INDEX
 */
/* Used to separate primary and secondary entries in an index -- we need
   to have real multilivel indexing support, not just string analysis.  */
#define INDEX_SEP "@this string will never appear@" /* was , */

typedef struct
{
  char *from;
  char *to;
} XML_SYNONYM;

static XML_SYNONYM **xml_synonyms = NULL;
static int xml_synonyms_count = 0;

void
xml_insert_indexterm (char *indexterm, char *index)
{
  /* @index commands can appear between @item and @itemx, @deffn and @deffnx.  */
  if (!docbook)
    {
      /* Check to see if we need to do index redirection per @synindex.  */
      int i;
      for (i = 0; i < xml_synonyms_count; i++)
        {
          if (STREQ (xml_synonyms[i]->from, index))
            index = xstrdup (xml_synonyms[i]->to);
        }

      xml_dont_touch_items_defs++;
      xml_insert_element_with_attribute (INDEXTERM, START, "index=\"%s\"", index);
      in_indexterm = 1;
      execute_string ("%s", indexterm);
      xml_insert_element (INDEXTERM, END);
      in_indexterm = 0;
      xml_dont_touch_items_defs--;
    }
  else
    {
      char *primary = NULL, *secondary = NULL;
      if (strstr (indexterm+1, INDEX_SEP))
        {
          primary = xmalloc (strlen (indexterm) + 1);
          strcpy (primary, indexterm);
          secondary = strstr (primary+1, INDEX_SEP);
          *secondary = '\0';
          secondary += strlen (INDEX_SEP);
        }
      xml_insert_element_with_attribute (INDEXTERM, START, "role=\"%s\"", index);
      in_indexterm = 1;
      xml_insert_element (PRIMARY, START);
      if (primary)
        execute_string ("%s", primary);
      else
        execute_string ("%s", indexterm);
      xml_insert_element (PRIMARY, END);
      if (primary)
        {
          xml_insert_element (SECONDARY, START);
          execute_string ("%s", secondary);
          xml_insert_element (SECONDARY, END);
        }
      xml_insert_element (INDEXTERM, END);
      in_indexterm = 0;
    }
}


int xml_last_section_output_position = 0;
static char last_division_letter = ' ';
static char index_primary[2000]; /** xx no fixed limit */
static int indexdivempty = 0;

static void
xml_close_indexentry (void)
{
  if (!in_indexentry)
    return;
  if (in_secondary)
    xml_insert_element (SECONDARYIE, END);
  xml_insert_element (INDEXENTRY, END);
  in_secondary = 0;
  in_indexentry = 0;
}

void
xml_begin_index (void)
{
  if (handling_delayed_writes)
    {
      /* We put <INDEX> */
      xml_insert_element (PRINTINDEX, START);
    }
}

void
xml_end_index (void)
{
  xml_insert_element (PRINTINDEX, END);
}

static void
xml_index_divide (char *entry)
{
  char c;
  if (strlen (entry) > (strlen (xml_element_list[CODE].name) + 2) &&
      strncmp (entry+1, xml_element_list[CODE].name, strlen (xml_element_list[CODE].name)) == 0)
    c = entry[strlen (xml_element_list[CODE].name)+2];
  else
    c = entry[0];
  if (tolower (c) != last_division_letter && isalpha (c))
    {
      last_division_letter = tolower (c);
      xml_close_indexentry ();
      if (!indexdivempty)
        {
          xml_insert_element (INDEXDIV, END);
          xml_insert_element (INDEXDIV, START);
        }
      xml_insert_element (TITLE, START);
      insert (toupper (c));
      xml_insert_element (TITLE, END);
    }
}

void
xml_synindex (char *from, char *to)
{
  int i, slot;

  slot = -1;
  for (i = 0; i < xml_synonyms_count; i++)
    if (!xml_synonyms[i])
      {
        slot = i;
        break;
      }

  if (slot < 0)
    {
      slot = xml_synonyms_count;
      xml_synonyms_count++;

      xml_synonyms = (XML_SYNONYM **) xrealloc (xml_synonyms,
          (xml_synonyms_count + 1) * sizeof (XML_SYNONYM *));
    }

  xml_synonyms[slot] = xmalloc (sizeof (XML_SYNONYM));
  xml_synonyms[slot]->from = xstrdup (from);
  xml_synonyms[slot]->to = xstrdup (to);
}

/*
 * MULTITABLE
 */

static int multitable_columns_count;
static int *multitable_column_widths;

void
xml_begin_multitable (int ncolumns, int *column_widths)
{
  int i;
  if (docbook)
    {
      if (is_in_insertion_of_type (floatenv))
        xml_begin_docbook_float (MULTITABLE);
      else
        xml_insert_element (MULTITABLE, START);

      multitable_columns_count = ncolumns;
      multitable_column_widths = xmalloc (sizeof (int) * ncolumns);
      memcpy (multitable_column_widths, column_widths,
          sizeof (int) * ncolumns);

      xml_no_para = 1;
    }
  else
    {
      xml_insert_element (MULTITABLE, START);
      for (i = 0; i < ncolumns; i++)
        {
          xml_insert_element (COLSPEC, START);
          add_word_args ("%d", column_widths[i]);
          xml_insert_element (COLSPEC, END);
        }
      xml_no_para = 1;
    }
}

static void
xml_begin_multitable_group (void)
{
  int i;

  xml_insert_element_with_attribute (TGROUP, START, "cols=\"%d\"",
      multitable_columns_count);

  for (i = 0; i < multitable_columns_count; i++)
    {
      xml_insert_element_with_attribute (COLSPEC, START,
          "colwidth=\"%d*\"", multitable_column_widths[i]);
      xml_insert_element (COLSPEC, END);
    }
}

void
xml_end_multitable_row (int first_row)
{
  if (!first_row)
    {
      xml_insert_element (ENTRY, END);
      xml_insert_element (ROW, END);
    }

  if (headitem_flag)
    {
      if (!first_row)
        {
          if (after_headitem)
            xml_insert_element (THEAD, END);
          else
            xml_insert_element (TBODY, END);
          xml_insert_element (TGROUP, END);
        }

      xml_begin_multitable_group ();
      xml_insert_element (THEAD, START);
    }
  else if (first_row)
    {
      xml_begin_multitable_group ();
      xml_insert_element (TBODY, START);
    }
  else if (after_headitem)
    {
      xml_insert_element (THEAD, END);
      xml_insert_element (TBODY, START);
    }
  else if (first_row)
    xml_insert_element (TBODY, START);

  xml_insert_element (ROW, START);
  xml_insert_element (ENTRY, START);
}

void
xml_end_multitable_column (void)
{
  xml_insert_element (ENTRY, END);
  xml_insert_element (ENTRY, START);
}

void
xml_end_multitable (void)
{
  xml_insert_element (ENTRY, END);
  xml_insert_element (ROW, END);

  if (after_headitem)
    {
      if (docbook)
        warning (_("@headitem as the last item of @multitable produces invalid Docbook documents"));
      xml_insert_element (THEAD, END);
    }
  else
    xml_insert_element (TBODY, END);

  if (docbook)
    xml_insert_element (TGROUP, END);

  xml_insert_element (MULTITABLE, END);
  xml_no_para = 0;
}

/*
 * Parameters in @def definitions
 */

#define DEFUN_SELF_DELIMITING(c) \
  ((c) == '(' || (c) == ')' || (c) == '[' || (c) == ']')

void
xml_process_defun_args (char **defun_args, int auto_var_p)
{
  int pending_space = 0;
  int just_after_paramtype = 0;

  for (;;)
    {
      char *defun_arg = *defun_args++;

      if (defun_arg == NULL)
        break;

      if (defun_arg[0] == ' ')
        {
          pending_space = 1;
          continue;
        }

      if (pending_space)
        {
          add_char (' ');
          pending_space = 0;
        }

      if (DEFUN_SELF_DELIMITING (defun_arg[0]))
        {
	  xml_insert_element (DEFDELIMITER, START);
          add_char (defun_arg[0]);
	  xml_insert_element (DEFDELIMITER, END);
	  just_after_paramtype = 0;
        }
      else if (defun_arg[0] == '&')
	{
	  xml_insert_element (DEFPARAM, START);
	  add_word (defun_arg);
	  xml_insert_element (DEFPARAM, END);
	  just_after_paramtype = 0;
	}
      else if (defun_arg[0] == COMMAND_PREFIX || just_after_paramtype)
	{
	  xml_insert_element (DEFPARAM, START);
	  execute_string ("%s", defun_arg);
	  xml_insert_element (DEFPARAM, END);
	  just_after_paramtype = 0;
	}
      else if (defun_arg[0] == ',' || defun_arg[0] == ';')
	{
	  xml_insert_element (DEFDELIMITER, START);
	  add_word (defun_arg);
	  xml_insert_element (DEFDELIMITER, END);
	  just_after_paramtype = 0;
	}
      else if (auto_var_p)
	{
	  xml_insert_element (DEFPARAM, START);
	  add_word (defun_arg);
	  xml_insert_element (DEFPARAM, END);
	  just_after_paramtype = 0;
	}
      else
	{
	  xml_insert_element (DEFPARAMTYPE, START);
	  add_word (defun_arg);
	  xml_insert_element (DEFPARAMTYPE, END);
	  just_after_paramtype = 1;
	}
    }
}

void
xml_begin_definition (void)
{
  xml_insert_element (DEFINITION, START);
  xml_definition_level ++;
  xml_in_def_item[xml_definition_level] = 0;
}

void
xml_end_definition (void)
{
  if (xml_in_def_item[xml_definition_level])
    {
      xml_insert_element (DEFINITIONITEM, END);
      xml_in_def_item[xml_definition_level] = 0;
    }
  xml_after_def_term = 0;
  xml_insert_element (DEFINITION, END);
  xml_definition_level --;
}

void
xml_begin_def_term (int base_type, const char *category,
    char *defined_name, char *type_name, char *type_name2)
{
  xml_after_def_term = 0;
  if (docbook)
    xml_insert_element_with_attribute (DEFINITIONTERM, START,
				       "role=\"%s\"", category);
  else
    xml_insert_element (DEFINITIONTERM, START);

  /* Index entry */
  switch (base_type)
    {
    case deffn:
    case deftypefn:
      execute_string ("@findex %s\n", defined_name);
      break;
    case defvr:
    case deftypevr:
    case defcv:
      execute_string ("@vindex %s\n", defined_name);
      break;
    case deftypecv:
    case deftypeivar:
      execute_string ("@vindex %s %s %s\n", defined_name, _("of"), type_name);
      break;
    case deftypemethod:
    case defop:
    case deftypeop:
      execute_string ("@findex %s %s %s\n", defined_name, _("on"), type_name);
      break;
    case deftp:
      execute_string ("@tindex %s\n", defined_name);
      break;
    }

  /* Start with category.  */
  if (! docbook)
    {
      xml_insert_element (DEFCATEGORY, START);
      execute_string (docbook ? "[%s]" : "%s", category);
      xml_insert_element (DEFCATEGORY, END);
      add_char(' ');
    }

  /* Output type name first for typed definitions.  */
  switch (base_type)
    {
    case deffn:
    case defvr:
    case deftp:
      break;

    case deftypefn:
    case deftypevr:
      xml_insert_element (DEFTYPE, START);
      execute_string ("%s", type_name);
      xml_insert_element (DEFTYPE, END);
      add_char (' ');
      break;

    case deftypecv:
    case deftypeivar:
    case deftypemethod:
    case deftypeop:
      xml_insert_element (DEFTYPE, START);
      execute_string ("%s", type_name2);
      xml_insert_element (DEFTYPE, END);
      add_char (' ');
      break;

    default:
      xml_insert_element (DEFCLASS, START);
      execute_string ("%s", type_name);
      xml_insert_element (DEFCLASS, END);
      add_char (' ');
      break;
    }

  /* Categorize rest of the definitions.  */
  switch (base_type)
    {
    case deffn:
    case deftypefn:
      xml_insert_element (DEFFUNCTION, START);
      execute_string ("%s", defined_name);
      xml_insert_element (DEFFUNCTION, END);
      break;

    case defvr:
    case deftypevr:
      xml_insert_element (DEFVARIABLE, START);
      execute_string ("%s", defined_name);
      xml_insert_element (DEFVARIABLE, END);
      break;

    case deftp:
      xml_insert_element (DEFDATATYPE, START);
      execute_string ("%s", defined_name);
      xml_insert_element (DEFDATATYPE, END);
      break;

    case defcv:
    case deftypecv:
    case deftypeivar:
      xml_insert_element (DEFCLASSVAR, START);
      execute_string ("%s", defined_name);
      xml_insert_element (DEFCLASSVAR, END);
      break;

    case defop:
    case deftypeop:
    case deftypemethod:
      /* Operation / Method */
      xml_insert_element (DEFOPERATION, START);
      execute_string ("%s", defined_name);
      xml_insert_element (DEFOPERATION, END);
      break;
    }
}

void
xml_end_def_term (void)
{
  xml_insert_element (DEFINITIONTERM, END);
  xml_after_def_term = 1;
}
