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CanvasText.letters[ch];},parseLexemes:function(str){if(CanvasText._bufferLexemes[str])
return CanvasText._bufferLexemes[str];var i,c,matches=str.match(/&[A-Za-z]{2,5};|\s|./g);var result=[],chars=[];for(i=0;i<matches.length;i++){c=matches[i];if(c.length==1)
chars.push(c);else{var entity=c.substring(1,c.length-1);if(CanvasText.specialchars[entity])
chars.push(entity);else
chars=chars.concat(c.toArray());}}
for(i=0;i<chars.length;i++){c=chars[i];if(c=CanvasText.letters[c]||CanvasText.specialchars[c])result.push(c);}
return CanvasText._bufferLexemes[str]=result.compact();},ascent:function(style){style=style||CanvasText.style;return(style.size||CanvasText.style.size);},descent:function(style){style=style||CanvasText.style;return 7.0*(style.size||CanvasText.style.size)/25.0;},measure:function(str,style){if(!str)return;style=style||CanvasText.style;var i,width,lexemes=CanvasText.parseLexemes(str),total=0;for(i=lexemes.length-1;i>-1;--i){c=lexemes[i];width=(c.diacritic)?CanvasText.letter(c.letter).width:c.width;total+=width*(style.tracking||CanvasText.style.tracking)*(style.size||CanvasText.style.size)/25.0;}
return total;},getDimensions:function(str,style){style=style||CanvasText.style;var width=CanvasText.measure(str,style),height=style.size||CanvasText.style.size,angle=style.angle||CanvasText.style.angle;if(style.angle==0)return{width:width,height:height};return{width:Math.abs(Math.cos(angle)*width)+Math.abs(Math.sin(angle)*height),height:Math.abs(Math.sin(angle)*width)+Math.abs(Math.cos(angle)*height)}},getBestAlign:function(angle,style){style=style||CanvasText.style;angle+=CanvasText.getAngleFromAlign(style.halign,style.valign);var a={h:'c',v:'m'};if(Math.round(Math.cos(angle)*1000)/1000!=0)
a.h=(Math.cos(angle)>0?'r':'l');if(Math.round(Math.sin(angle)*1000)/1000!=0)
a.v=(Math.sin(angle)>0?'t':'b');return a;},getAngleFromAlign:function(halign,valign){var pi=Math.PI,table={'rm':0,'rt':pi/4,'ct':pi/2,'lt':3*(pi/4),'lm':pi,'lb':-3*(pi/4),'cb':-pi/2,'rb':-pi/4,'cm':0}
return table[halign+valign];},drawPoints:function(ctx,points,x,y,mag,offset){var i,a,penUp=true,needStroke=0;offset=offset||{x:0,y:0};ctx.beginPath();for(i=0;i<points.length;i++){a=points[i];if(!a){penUp=true;continue;}
if(penUp){ctx.moveTo(x+a[0]*mag+offset.x,y-a[1]*mag+offset.y);penUp=false;}
else{ctx.lineTo(x+a[0]*mag+offset.x,y-a[1]*mag+offset.y);}}
ctx.stroke();},draw:function(str,xOrig,yOrig,style){if(!str)return;style=style||CanvasText.style;style.halign=style.halign||CanvasText.style.halign;style.valign=style.valign||CanvasText.style.valign;style.angle=style.angle||CanvasText.style.angle;style.size=style.size||CanvasText.style.size;style.adjustAlign=style.adjustAlign||CanvasText.style.adjustAlign;var i,c,total=0,mag=style.size/25.0,x=0,y=0,lexemes=CanvasText.parseLexemes(str),offset={x:0,y:0},measure=CanvasText.measure(str,style),align;if(style.adjustAlign){align=CanvasText.getBestAlign(style.angle,style);style.halign=align.h;style.valign=align.v;}
switch(style.halign){case'l':break;case'c':offset.x=-measure/2;break;case'r':offset.x=-measure;break;}
switch(style.valign){case'b':break;case'm':offset.y=style.size/2;break;case't':offset.y=style.size;break;}
this.save();this.translate(xOrig,yOrig);this.rotate(style.angle);this.lineCap="round";this.lineWidth=2.0*mag*(style.weight||CanvasText.style.weight);this.strokeStyle=style.color||CanvasText.style.color;for(i=0;i<lexemes.length;i++){c=lexemes[i];if(c.width==-1){x=0;y=style.size*1.4;continue;}
var points=c.points,width=c.width;if(c.diacritic){var dia=CanvasText.diacritics[c.diacritic],character=CanvasText.letter(c.letter);CanvasText.drawPoints(this,dia.points,x,y-(c.letter.toUpperCase()==c.letter?3:0),mag,offset);points=character.points;width=character.width;}
CanvasText.drawPoints(this,points,x,y,mag,offset);if(CanvasText.debug){this.save();this.lineJoin="miter";this.lineWidth=0.5;this.strokeStyle=(style.boundingBoxColor||CanvasText.style.boundingBoxColor);this.strokeRect(x+offset.x,y+offset.y,width*mag,-style.size);this.fillStyle=(style.originPointColor||CanvasText.style.originPointColor);this.beginPath();this.arc(0,0,1.5,0,Math.PI*2,true);this.fill();this.restore();}
x+=width*mag*(style.tracking||CanvasText.style.tracking);}
this.restore();return total;}};CanvasText.proto=window.CanvasRenderingContext2D?window.CanvasRenderingContext2D.prototype:document.createElement('canvas').getContext('2d').__proto__;if(CanvasText.proto){CanvasText.proto.drawText=CanvasText.draw;CanvasText.proto.measureText=CanvasText.measure;CanvasText.proto.getTextBounds=CanvasText.getDimensions;CanvasText.proto.fontAscent=CanvasText.ascent;CanvasText.proto.fontDescent=CanvasText.descent;}