Subversion Repositories wimsdev

/*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis

 *

 *  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.

 */

#include "wims.h"

/* fonts which should have align=middle */

char *middle_fonts=",y,beta,eta,mu,phi,rho,varphi,psi,\

le,leq,ge,geq,pm,ne,neq,\

subseteq,supseteq,wp,\

int,oint,Vert,\

QQ,\

leftpar2,leftpar3,leftpar4,leftpar5,leftpar6,\

leftpar7,leftpar8,leftpar9,leftpar10,leftpar11,leftpar12,\

rightpar2,rightpar3,rightpar4,rightpar5,rightpar6,\

rightpar7,rightpar8,rightpar9,rightpar10,rightpar11,rightpar12,\

leftbrace2,leftbrace3,leftbrace4,leftbrace5,leftbrace6,\

leftbrace7,leftbrace8,leftbrace9,leftbrace10,leftbrace11,leftbrace12,\

rightbrace2,rightbrace3,rightbrace4,rightbrace5,rightbrace6,\

rightbrace7,rightbrace8,rightbrace9,rightbrace10,rightbrace11,rightbrace12,";

/* These are temporary definitions. */

char *mathfont_dir="mathfonts";

/* tex font size list */

int texsize_list[]={63,69,76,83,91,100,109,120,131,144,158,173};

int texbasesize=6; /* defaults to 109 */

int usertexsize=-1; /* non-negative if defined */

#define texsize_no (sizeof(texsize_list)/sizeof(texsize_list[0]))

int current_tex_size;

void fix_tex_size(void)

{

  char buf[64],*p; int i,ts;

  ts=texbasesize;

  if(usertexsize>=0) ts=usertexsize+1;

  if(getwimstexsize) p=getvar("wims_texsize"); else p=NULL;

  if(p!=NULL && *p!=0) {

    i=evalue(p);

    if(i>=-5 && i<=5) ts+=i;

  }

  if(ts<0) ts=0;

  if(ts>=texsize_no) ts=texsize_no-1;

  current_tex_size=texsize_list[ts];

  snprintf(buf,sizeof(buf),"%d",current_tex_size);

  setenv("texgif_density",buf,1);

}

/* takes math font image file string */

char *mathfont(char *fontname)

{

  char buf1[MAX_LINELEN+1],buf2[MAX_LINELEN+1];

  struct stat st;

  if(fontname[0]=='\\') fontname++;

  else if(strncmp(fontname,mathfont_prefix,strlen(mathfont_prefix))==0)

    fontname+=strlen(mathfont_prefix);

  if(strlen(fontname)==1 /* && strchr("xyz",fontname[0])==NULL */) {

    char c=fontname[0];

    if(!isalpha(c)) { // c is not a letter

      buf2[0]=c;buf2[1]=0;

   }

   else {

// case of variable xyz in particular

    char *pp;

    if(c=='f') pp=" "; else pp="";

    snprintf(buf2,sizeof(buf2),"<i>%c</i>%s",c,pp);

//FIXME-> should we arrive here in mathml case ???

    }

  }

  else {/* interpret font with at least two caracters as \RR \calB - only outside of math environment

    not useful in mathml*/

    char *underscore;

    fix_tex_size(); underscore="";

    {

      char *p, *p2;

      for(p=fontname; *p && !isupper(*p); p++);

/* verify positionning of capital letter */

      if(*p && p>fontname && *(p+1)!=0) return NULL;

      if(p==fontname && (fontname[1]!=*p || strlen(fontname)!=2)) {

        for(p2=p+1; *p2 && !isupper(*p2); p2++);

        if(*p2) return NULL;

      }

      if(*p) underscore="_";

    }

    snprintf(buf1,sizeof(buf1),"%s/%d/%s%s.gif",

           mathfont_dir,current_tex_size,fontname,underscore);

    if(*underscore && stat(buf1,&st)!=0)

      snprintf(buf1,sizeof(buf1),"%s/%d/%s.gif",

             mathfont_dir,current_tex_size,fontname);

    if(stat(buf1,&st)!=0) return NULL;

    snprintf(buf2,sizeof(buf2),",%s,",fontname);

    if(strstr(middle_fonts,buf2)!=NULL)

      snprintf(buf2,sizeof(buf2),

             "%s<img src=\"%s%s\" style=\"vertical-align: middle; border:none\" \

alt=\"%s\">%s",

             mathalign_sup1,ref_base,buf1,fontname,mathalign_sup2);

    else

       snprintf(buf2,sizeof(buf2),"<img src=\"%s%s\" style=\"margin:0px; border:none\" \

alt=\"%s\">",

             ref_base,buf1,fontname);

  }

  force_setvar("wims_mathfont_",buf2); return getvar("wims_mathfont_");

}