/*
 Copyright (C) 2000-2007 Carsten Haitzler, Geoff Harrison and various contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to
 deal in the Software without restriction, including without limitation the
 rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 sell copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in
 all copies of the Software, its documentation and marketing & publicity
 materials, and acknowledgment shall be given in the documentation, materials
 and software packages that this Software was used.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include "dox.h"

static char       **
TextGetLines(const char *text, int *count)
{
   int                 i, j, k;
   char              **list = NULL;

   *count = 0;
   i = 0;
   k = 0;
   if (!text)
      return NULL;
   *count = 1;
   while (text[i])
     {
	j = i;
	while ((text[j]) && (text[j] != '\n'))
	   j++;
	k++;
	list = EREALLOC(char *, list, k);
	list[k - 1] = EMALLOC(char, j - i + 1);

	strncpy(list[k - 1], &(text[i]), (j - i));
	list[k - 1][j - i] = 0;
	i = j;
	if (text[i] == '\n')
	   i++;
     }
   *count = k;
   return list;
}

void
TextStateLoadFont(TextState * ts)
{
#if USE_XFONT
   if ((ts->efont) || (ts->xfont) || (ts->xfontset))
#else
   if ((ts->efont) || (ts->xfontset))
#endif
      return;

   if (!ts->fontname)
      return;

   if (!ts->efont)
     {
	char                s[4096], w[4046], *s2, *ss;

	s2 = NULL;
	s2 = strdup(ts->fontname);
	ss = strchr(s2, '/');
	if (ss)
	  {
	     *ss = ' ';
	     word(s2, 1, w);
	     sprintf(s, "%s/%s.ttf", docdir, w);
	     word(s2, 2, w);
	     ts->efont = Efont_load(s, atoi(w));
	     if (ts->efont)
	       {
		  int                 as, ds;

		  Efont_extents(ts->efont, " ", &as, &ds, NULL, NULL, NULL,
				NULL, NULL);
		  ts->xfontset_ascent = as;
		  ts->height = as + ds;
	       }
	  }
	if (s2)
	   free(s2);
	if (ts->efont)
	   return;
     }

#if USE_XFONT
   if ((!ts->xfont) && (strchr(ts->fontname, ',') == NULL))
     {
	ts->xfont = XLoadQueryFont(disp, ts->fontname);
	if (ts->xfont)
	  {
	     ts->xfontset_ascent = ts->xfont->ascent;
	     ts->height = ts->xfont->ascent + ts->xfont->descent;
	     return;
	  }
     }
#endif

   if (!ts->xfontset)
     {
	int                 i, missing_cnt, font_cnt;
	int                 descent;
	char              **missing_list, *def_str, **fn;
	XFontStruct       **fs;

	ts->xfontset = XCreateFontSet(disp, ts->fontname, &missing_list,
				      &missing_cnt, &def_str);
	if (!ts->xfontset)
	   ts->xfontset = XCreateFontSet(disp, "fixed", &missing_list,
					 &missing_cnt, &def_str);
	if (missing_cnt)
	   XFreeStringList(missing_list);
	if (!ts->xfontset)
	   return;
	font_cnt = XFontsOfFontSet(ts->xfontset, &fs, &fn);
	ts->xfontset_ascent = 0;
	for (i = 0; i < font_cnt; i++)
	   ts->xfontset_ascent = MAX(fs[i]->ascent, ts->xfontset_ascent);
	descent = 0;
	for (i = 0; i < font_cnt; i++)
	   descent = MAX(fs[i]->descent, descent);
	ts->height = ts->xfontset_ascent + descent;
     }
}

void
TextSize(TextState * ts, const char *text, int *width, int *height, int fsize)
{
   char              **lines;
   int                 i, num_lines;

   *width = 0;
   *height = 0;

   lines = TextGetLines(text, &num_lines);
   if (!lines)
      return;

   if (!ts)
      return;

   TextStateLoadFont(ts);

   if (ts->efont)
     {
	for (i = 0; i < num_lines; i++)
	  {
	     int                 ascent, descent, wid;

	     Efont_extents(ts->efont, lines[i], &ascent, &descent, &wid,
			   NULL, NULL, NULL, NULL);
	     *height += ascent + descent;
	     if (wid > *width)
		*width = wid;
	  }
     }
   else if (ts->xfontset)
     {
	for (i = 0; i < num_lines; i++)
	  {
	     XRectangle          ret1, ret2;

	     XmbTextExtents(ts->xfontset, lines[i], strlen(lines[i]), &ret1,
			    &ret2);
	     *height += ret2.height;
	     if (ret2.width > *width)
		*width = ret2.width;
	  }
     }
#if USE_XFONT
   else if ((ts->xfont) && (ts->xfont->min_byte1 == 0) &&
	    (ts->xfont->max_byte1 == 0))
     {
	for (i = 0; i < num_lines; i++)
	  {
	     int                 wid;

	     wid = XTextWidth(ts->xfont, lines[i], strlen(lines[i]));
	     *height += ts->xfont->ascent + ts->xfont->descent;
	     if (wid > *width)
		*width = wid;
	  }
     }
   else if ((ts->xfont))
     {
	for (i = 0; i < num_lines; i++)
	  {
	     int                 wid;

	     wid = XTextWidth16(ts->xfont, (XChar2b *) lines[i],
				strlen(lines[i]) / 2);
	     *height += ts->xfont->ascent + ts->xfont->descent;
	     if (wid > *width)
		*width = wid;
	  }
     }
#endif /* USE_XFONT */
   freestrlist(lines, num_lines);
   return;
   fsize = 0;
}

void
TextDraw(TextState * ts, Window win, char *text,
	 int x, int y, int w, int h, int fsize, int justification)
{
   char              **lines;
   int                 i, num_lines;
   int                 xx, yy;
   XGCValues           gcv;
   static GC           gc = 0;

   lines = TextGetLines(text, &num_lines);
   if (!lines)
      return;

   if (!ts)
      return;

   TextStateLoadFont(ts);
   xx = x;
   yy = y;

   if (!gc)
      gc = XCreateGC(disp, win, 0, &gcv);

   if (ts->efont)
     {
	for (i = 0; i < num_lines; i++)
	  {
	     int                 ascent, descent, wid;

	     Efont_extents(ts->efont, lines[i], &ascent, &descent, &wid,
			   NULL, NULL, NULL, NULL);
	     if (i == 0)
		yy += ascent;
	     xx = x + (((w - wid) * justification) >> 10);
	     if (ts->effect == 1)
	       {
		  EAllocColor(&ts->bg_col);
		  XSetForeground(disp, gc, ts->bg_col.pixel);
		  EFont_draw_string(disp, win, gc, xx + 1, yy + 1,
				    lines[i], ts->efont, VRoot.vis, VRoot.cmap);
	       }
	     else if (ts->effect == 2)
	       {
		  EAllocColor(&ts->bg_col);
		  XSetForeground(disp, gc, ts->bg_col.pixel);
		  EFont_draw_string(disp, win, gc, xx - 1, yy,
				    lines[i], ts->efont, VRoot.vis, VRoot.cmap);
		  EFont_draw_string(disp, win, gc, xx + 1, yy,
				    lines[i], ts->efont, VRoot.vis, VRoot.cmap);
		  EFont_draw_string(disp, win, gc, xx, yy - 1,
				    lines[i], ts->efont, VRoot.vis, VRoot.cmap);
		  EFont_draw_string(disp, win, gc, xx, yy + 1,
				    lines[i], ts->efont, VRoot.vis, VRoot.cmap);
	       }
	     EAllocColor(&ts->fg_col);
	     XSetForeground(disp, gc, ts->fg_col.pixel);
	     EFont_draw_string(disp, win, gc, xx, yy,
			       lines[i], ts->efont, VRoot.vis, VRoot.cmap);
	     yy += ascent + descent;
	  }
     }
   else if (ts->xfontset)
     {
	for (i = 0; i < num_lines; i++)
	  {
	     XRectangle          ret1, ret2;

	     XmbTextExtents(ts->xfontset, lines[i], strlen(lines[i]), &ret1,
			    &ret2);
	     if (i == 0)
		yy += ts->xfontset_ascent;
	     xx = x + (((w - ret2.width) * justification) >> 10);
	     if (ts->effect == 1)
	       {
		  EAllocColor(&ts->bg_col);
		  XSetForeground(disp, gc, ts->bg_col.pixel);
		  XmbDrawString(disp, win, ts->xfontset, gc, xx + 1, yy + 1,
				lines[i], strlen(lines[i]));
	       }
	     else if (ts->effect == 2)
	       {
		  EAllocColor(&ts->bg_col);
		  XSetForeground(disp, gc, ts->bg_col.pixel);
		  XmbDrawString(disp, win, ts->xfontset, gc, xx - 1, yy,
				lines[i], strlen(lines[i]));
		  XmbDrawString(disp, win, ts->xfontset, gc, xx + 1, yy,
				lines[i], strlen(lines[i]));
		  XmbDrawString(disp, win, ts->xfontset, gc, xx, yy - 1,
				lines[i], strlen(lines[i]));
		  XmbDrawString(disp, win, ts->xfontset, gc, xx, yy + 1,
				lines[i], strlen(lines[i]));
	       }
	     EAllocColor(&ts->fg_col);
	     XSetForeground(disp, gc, ts->fg_col.pixel);
	     XmbDrawString(disp, win, ts->xfontset, gc, xx, yy,
			   lines[i], strlen(lines[i]));
	     yy += ret2.height;
	  }
     }
#if USE_XFONT
   else if ((ts->xfont) && (ts->xfont->min_byte1 == 0) &&
	    (ts->xfont->max_byte1 == 0))
     {
	XSetFont(disp, gc, ts->xfont->fid);
	for (i = 0; i < num_lines; i++)
	  {
	     int                 wid;

	     wid = XTextWidth(ts->xfont, lines[i], strlen(lines[i]));
	     if (i == 0)
		yy += ts->xfont->ascent;
	     xx = x + (((w - wid) * justification) >> 10);
	     if (ts->effect == 1)
	       {
		  EAllocColor(&ts->bg_col);
		  XSetForeground(disp, gc, ts->bg_col.pixel);
		  XDrawString(disp, win, gc, xx + 1, yy + 1,
			      lines[i], strlen(lines[i]));
	       }
	     else if (ts->effect == 2)
	       {
		  EAllocColor(&ts->bg_col);
		  XSetForeground(disp, gc, ts->bg_col.pixel);
		  XDrawString(disp, win, gc, xx - 1, yy,
			      lines[i], strlen(lines[i]));
		  XDrawString(disp, win, gc, xx + 1, yy,
			      lines[i], strlen(lines[i]));
		  XDrawString(disp, win, gc, xx, yy - 1,
			      lines[i], strlen(lines[i]));
		  XDrawString(disp, win, gc, xx, yy + 1,
			      lines[i], strlen(lines[i]));
	       }
	     EAllocColor(&ts->fg_col);
	     XSetForeground(disp, gc, ts->fg_col.pixel);
	     XDrawString(disp, win, gc, xx, yy, lines[i], strlen(lines[i]));
	     yy += ts->xfont->ascent + ts->xfont->descent;
	  }
     }
   else if ((ts->xfont))
     {
	XSetFont(disp, gc, ts->xfont->fid);
	for (i = 0; i < num_lines; i++)
	  {
	     int                 wid;

	     wid = XTextWidth16(ts->xfont, (XChar2b *) lines[i],
				strlen(lines[i]) / 2);
	     if (i == 0)
		yy += ts->xfont->ascent;
	     xx = x + (((w - wid) * justification) >> 10);
	     if (ts->effect == 1)
	       {
		  EAllocColor(&ts->bg_col);
		  XSetForeground(disp, gc, ts->bg_col.pixel);
		  XDrawString16(disp, win, gc, xx + 1, yy + 1,
				(XChar2b *) lines[i], strlen(lines[i]) / 2);
	       }
	     else if (ts->effect == 2)
	       {
		  EAllocColor(&ts->bg_col);
		  XSetForeground(disp, gc, ts->bg_col.pixel);
		  XDrawString16(disp, win, gc, xx - 1, yy,
				(XChar2b *) lines[i], strlen(lines[i]) / 2);
		  XDrawString16(disp, win, gc, xx + 1, yy,
				(XChar2b *) lines[i], strlen(lines[i]) / 2);
		  XDrawString16(disp, win, gc, xx, yy - 1,
				(XChar2b *) lines[i], strlen(lines[i]) / 2);
		  XDrawString16(disp, win, gc, xx, yy + 1,
				(XChar2b *) lines[i], strlen(lines[i]) / 2);
	       }
	     EAllocColor(&ts->fg_col);
	     XSetForeground(disp, gc, ts->fg_col.pixel);
	     XDrawString16(disp, win, gc, xx, yy,
			   (XChar2b *) lines[i], strlen(lines[i]) / 2);
	     yy += ts->xfont->ascent + ts->xfont->descent;
	  }
     }
#endif /* USE_XFONT */
   freestrlist(lines, num_lines);
   return;
   h = fsize = 0;
}