From 9c703b50aa4f382a882a5d142bb11d313188833f Mon Sep 17 00:00:00 2001
From: Markus Koch <markus@notsyncing.net>
Date: Sun, 19 Apr 2020 22:47:35 +0200
Subject: Import L.LabelTextCollision.js and ctxtextpath.js into repo

---
 htdocs/leafletjs/ctxtextpath.js | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 htdocs/leafletjs/ctxtextpath.js

(limited to 'htdocs/leafletjs/ctxtextpath.js')

diff --git a/htdocs/leafletjs/ctxtextpath.js b/htdocs/leafletjs/ctxtextpath.js
new file mode 100644
index 0000000..c9389cb
--- /dev/null
+++ b/htdocs/leafletjs/ctxtextpath.js
@@ -0,0 +1,35 @@
+(function()
+{function dist2D(x1,y1,x2,y2)
+{var dx=x2-x1;var dy=y2-y1;return Math.sqrt(dx*dx+dy*dy);}
+CanvasRenderingContext2D.prototype.textOverflow="";CanvasRenderingContext2D.prototype.textJustify=false;CanvasRenderingContext2D.prototype.textStrokeMin=0;var state=[];var save=CanvasRenderingContext2D.prototype.save;CanvasRenderingContext2D.prototype.save=function()
+{state.push({textOverflow:this.textOverflow,textJustify:this.textJustify,textStrokeMin:this.textStrokeMin,});save.call(this);}
+var restore=CanvasRenderingContext2D.prototype.restore;CanvasRenderingContext2D.prototype.restore=function()
+{restore.call(this);var s=state.pop();this.textOverflow=s.textOverflow;this.textJustify=s.textJustify;this.textStrokeMin=s.textStrokeMin;}
+CanvasRenderingContext2D.prototype.textPath=function(text,path)
+{var di,dpos=0;var pos=2;function pointAt(dl)
+{if(!di||dpos+di<dl)
+{for(;pos<path.length;)
+{di=dist2D(path[pos-2],path[pos-1],path[pos],path[pos+1]);if(dpos+di>dl)break;pos+=2;if(pos>=path.length)break;dpos+=di;}}
+var x,y,dt=dl-dpos;if(pos>=path.length)
+{pos=path.length-2;}
+if(!dt)
+{x=path[pos-2];y=path[pos-1];}
+else
+{x=path[pos-2]+(path[pos]-path[pos-2])*dt/di;y=path[pos-1]+(path[pos+1]-path[pos-1])*dt/di;}
+return[x,y,Math.atan2(path[pos+1]-path[pos-1],path[pos]-path[pos-2])];}
+var letterPadding=this.measureText(" ").width*0.25;var d=0;for(var i=2;i<path.length;i+=2)
+{d+=dist2D(path[i-2],path[i-1],path[i],path[i+1])}
+if(d<this.minWidth)return;var nbspace=text.split(" ").length-1;if(this.textOverflow!="visible")
+{if(d<this.measureText(text).width+(text.length-1+nbspace)*letterPadding)
+{var overflow=(this.textOverflow=="ellipsis")?'\u2026':this.textOverflow||"";var dt=overflow.length-1;do
+{if(text[text.length-1]===" ")nbspace--;text=text.slice(0,-1);}while(text&&d<this.measureText(text+overflow).width+(text.length+dt+nbspace)*letterPadding)
+text+=overflow;}}
+var start=0;switch(this.textJustify||this.textAlign)
+{case true:case "center":case "end":case "right":{if(this.textJustify)
+{start=0;letterPadding=(d-this.measureText(text).width)/(text.length-1+nbspace);}
+else
+{start=d-this.measureText(text).width-(text.length+nbspace)*letterPadding;if(this.textAlign=="center")start/=2;}
+break;}
+default:break;}
+for(var t=0;t<text.length;t++)
+{var letter=text[t];var wl=this.measureText(letter).width;var p=pointAt(start+wl/2);this.save();this.textAlign="center";this.translate(p[0],p[1]);this.rotate(p[2]);if(this.lineWidth>0.1)this.strokeText(letter,0,0);this.fillText(letter,0,0);this.restore();start+=wl+letterPadding*(letter==" "?2:1);}};})();
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