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Rev 17518 Rev 17586
Line 735... Line 735...
735 
 var C;var c;var len = txt.length;var baseline = 'middle';var space = 0;ctx.save();var subsup=0;\
 735 
 var C;var c;var len = txt.length;var baseline = 'middle';var space = 0;ctx.save();var subsup=0;\
736 
 var m = 0.4*(ctx.measureText(txt).width);\
 736 
 var m = 0.4*(ctx.measureText(txt).width);\
737 
 var h = ctx.measureText('M').width;\
 737 
 var h = ctx.measureText('M').width;\
738 
 switch(use_offset){\
 738 
 switch(use_offset){\
739 
  case 0:break;\
 739 
  case 0:break;\
740 
  case 1:y=y-h;;break;\
 740 
  case 1:y=y-h;break;\
741 
  case 2:x=x+h;break;\
 741 
  case 2:x=x+h;break;\
742 
  case 3:x=x+h;y=y-h;;break;\
 742 
  case 3:x=x+h;y=y-h;break;\
743 
  case 4:x=x-m;break;\
 743 
  case 4:x=x-m;break;\
744 
  default:break;\
 744 
  default:break;\
745 
 };\
 745 
 };\
- 
 
 746 
 var alphabet='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';\
- 
 
 747 
 function check_alpha(C){if(alphabet.indexOf(C) != -1){return 1;}else{return 0;};};\
746 
 var S = parseInt(ctx.font) || 10;var s = 0.8*(parseInt(ctx.font)) || 8;\
 748 
 var S = parseInt(ctx.font) || 10;var s = 0.8*(parseInt(ctx.font)) || 8;\
747 
 ctx.font = S+'px Helvetica';ctx.textBaseline = baseline;\
 749 
 ctx.font = S+'px Helvetica';ctx.textBaseline = baseline;\
748 
 for( c = 0 ; c < len ;c++){\
 750 
 for( c = 0 ; c < len ;c++){\
749 
  C = txt.charAt(c);space = 0;\
 751 
  C = txt.charAt(c);space = 0;\
750 
  if(C == '_'){ctx.font = s+'px Helvetica';subsup = 1;c++;space = 3;baseline='top';C = txt.charAt(c);}\
 752 
  if(C == '_'){ctx.font = s+'px Helvetica';subsup = 1;c++;space = 3;baseline='top';C = txt.charAt(c);}\
751 
  else\
 753 
  else\
752 
  if(C == '^'){ctx.font = s+'px Helvetica';subsup = 1;c++;space = 3;baseline='bottom';C = txt.charAt(c);}\
 754 
  if(C == '^'){ctx.font = s+'px Helvetica';subsup = 1;c++;space = 3;baseline='bottom';C = txt.charAt(c);}\
753 
  else\
 755 
  else\
754 
  if(C == ' '){ctx.font = S+'px Helvetica';if(subsup == 1){space = 0.6*s - (ctx.measureText('M').width);subsup = 0;};baseline = 'middle';}\
 756 
  if(C == ' ' ){ctx.font = S+'px Helvetica';if(subsup == 1){space = 0.6*s - (ctx.measureText('M').width);subsup = 0;};baseline = 'middle';}\
- 
 
 757 
  else\
- 
 
 758 
  if( subsup == 1 &&  c == '-'){c = '\\u2212';ctx.font = s+'px Helvetica';}\
- 
 
 759 
  else\
- 
 
 760 
  if( subsup == 1 &&  c == '+'){c = '\\u002B';ctx.font = s+'px Helvetica';}\
- 
 
 761 
  else\
- 
 
 762 
  if( check_alpha(C) == 1 ){ctx.font = S+'px Helvetica';subsup = 0;baseline = 'middle';}\
755 
  else\
 763 
  else\
756 
  if(C >= '0' && C <= '9'){ctx.font = s+'px Helvetica';}\
 764 
  if(C >= '0' && C <= '9'){ctx.font = s+'px Helvetica';}\
757 
  else{ctx.font = S+'px Helvetica';};\
 765 
  else{ ctx.font = S+'px Helvetica';};\
758 
  ctx.textBaseline = baseline;ctx.fillText(C,x,y);x = space + x + ctx.measureText(C).width;\
 766 
  ctx.textBaseline = baseline;ctx.fillText(C,x,y);x = space + x + ctx.measureText(C).width;\
759 
 };\
 767 
 };\
760 
 ctx.stroke();\
 768 
 ctx.stroke();\
761 
 ctx.restore();\
 769 
 ctx.restore();\
762 
 return;\
 770 
 return;\