discourse/public/javascripts/chartjs-plugin-datalabels/0.7.0/chartjs-plugin-datalabels.min.js

/*!
 * chartjs-plugin-datalabels v0.7.0
 * https://chartjs-plugin-datalabels.netlify.com
 * (c) 2019 Chart.js Contributors
 * Released under the MIT license
 */
!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e(require("chart.js")):"function"==typeof define&&define.amd?define(["chart.js"],e):(t=t||self).ChartDataLabels=e(t.Chart)}(this,function(t){"use strict";var e=(t=t&&t.hasOwnProperty("default")?t.default:t).helpers,r=function(){if("undefined"!=typeof window){if(window.devicePixelRatio)return window.devicePixelRatio;var t=window.screen;if(t)return(t.deviceXDPI||1)/(t.logicalXDPI||1)}return 1}(),n={toTextLines:function(t){var r,n=[];for(t=[].concat(t);t.length;)"string"==typeof(r=t.pop())?n.unshift.apply(n,r.split("\n")):Array.isArray(r)?t.push.apply(t,r):e.isNullOrUndef(t)||n.unshift(""+r);return n},toFontString:function(t){return!t||e.isNullOrUndef(t.size)||e.isNullOrUndef(t.family)?null:(t.style?t.style+" ":"")+(t.weight?t.weight+" ":"")+t.size+"px "+t.family},textSize:function(t,e,r){var n,i=[].concat(e),o=i.length,a=t.font,l=0;for(t.font=r.string,n=0;n<o;++n)l=Math.max(t.measureText(i[n]).width,l);return t.font=a,{height:o*r.lineHeight,width:l}},parseFont:function(r){var i=t.defaults.global,o=e.valueOrDefault(r.size,i.defaultFontSize),a={family:e.valueOrDefault(r.family,i.defaultFontFamily),lineHeight:e.options.toLineHeight(r.lineHeight,o),size:o,style:e.valueOrDefault(r.style,i.defaultFontStyle),weight:e.valueOrDefault(r.weight,null),string:""};return a.string=n.toFontString(a),a},bound:function(t,e,r){return Math.max(t,Math.min(e,r))},arrayDiff:function(t,e){var r,n,i,o,a=t.slice(),l=[];for(r=0,i=e.length;r<i;++r)o=e[r],-1===(n=a.indexOf(o))?l.push([o,1]):a.splice(n,1);for(r=0,i=a.length;r<i;++r)l.push([a[r],-1]);return l},rasterize:function(t){return Math.round(t*r)/r}};function i(t,e){var r=e.x,n=e.y;if(null===r)return{x:0,y:-1};if(null===n)return{x:1,y:0};var i=t.x-r,o=t.y-n,a=Math.sqrt(i*i+o*o);return{x:a?i/a:0,y:a?o/a:-1}}var o=0,a=1,l=2,s=4,u=8;function f(t,e,r){var n=o;return t<r.left?n|=a:t>r.right&&(n|=l),e<r.top?n|=u:e>r.bottom&&(n|=s),n}function d(t,e){var r,n,i=e.anchor,o=t;return e.clamp&&(o=function(t,e){for(var r,n,i,o=t.x0,d=t.y0,c=t.x1,h=t.y1,x=f(o,d,e),y=f(c,h,e);x|y&&!(x&y);)(r=x||y)&u?(n=o+(c-o)*(e.top-d)/(h-d),i=e.top):r&s?(n=o+(c-o)*(e.bottom-d)/(h-d),i=e.bottom):r&l?(i=d+(h-d)*(e.right-o)/(c-o),n=e.right):r&a&&(i=d+(h-d)*(e.left-o)/(c-o),n=e.left),r===x?x=f(o=n,d=i,e):y=f(c=n,h=i,e);return{x0:o,x1:c,y0:d,y1:h}}(o,e.area)),"start"===i?(r=o.x0,n=o.y0):"end"===i?(r=o.x1,n=o.y1):(r=(o.x0+o.x1)/2,n=(o.y0+o.y1)/2),function(t,e,r,n,i){switch(i){case"center":r=n=0;break;case"bottom":r=0,n=1;break;case"right":r=1,n=0;break;case"left":r=-1,n=0;break;case"top":r=0,n=-1;break;case"start":r=-r,n=-n;break;case"end":break;default:i*=Math.PI/180,r=Math.cos(i),n=Math.sin(i)}return{x:t,y:e,vx:r,vy:n}}(r,n,t.vx,t.vy,e.align)}var c={arc:function(t,e){var r=(t.startAngle+t.endAngle)/2,n=Math.cos(r),i=Math.sin(r),o=t.innerRadius,a=t.outerRadius;return d({x0:t.x+n*o,y0:t.y+i*o,x1:t.x+n*a,y1:t.y+i*a,vx:n,vy:i},e)},point:function(t,e){var r=i(t,e.origin),n=r.x*t.radius,o=r.y*t.radius;return d({x0:t.x-n,y0:t.y-o,x1:t.x+n,y1:t.y+o,vx:r.x,vy:r.y},e)},rect:function(t,e){var r=i(t,e.origin),n=t.x,o=t.y,a=0,l=0;return t.horizontal?(n=Math.min(t.x,t.base),a=Math.abs(t.base-t.x)):(o=Math.min(t.y,t.base),l=Math.abs(t.base-t.y)),d({x0:n,y0:o+l,x1:n+a,y1:o,vx:r.x,vy:r.y},e)},fallback:function(t,e){var r=i(t,e.origin);return d({x0:t.x,y0:t.y,x1:t.x,y1:t.y,vx:r.x,vy:r.y},e)}},h=t.helpers,x=n.rasterize;function y(t){var e=t._model.horizontal,r=t._scale||e&&t._xScale||t._yScale;if(!r)return null;if(void 0!==r.xCenter&&void 0!==r.yCenter)return{x:r.xCenter,y:r.yCenter};var n=r.getBasePixel();return e?{x:n,y:null}:{x:null,y:n}}function v(t,e,r){var n=t.shadowBlur,i=r.stroked,o=x(r.x),a=x(r.y),l=x(r.w);i&&t.strokeText(e,o,a,l),r.filled&&(n&&i&&(t.shadowBlur=0),t.fillText(e,o,a,l),n&&i&&(t.shadowBlur=n))}var _=function(t,e,r,n){var i=this;i._config=t,i._index=n,i._model=null,i._rects=null,i._ctx=e,i._el=r};h.extend(_.prototype,{_modelize:function(e,r,i,o){var a,l=this._index,s=h.options.resolve,u=n.parseFont(s([i.font,{}],o,l)),f=s([i.color,t.defaults.global.defaultFontColor],o,l);return{align:s([i.align,"center"],o,l),anchor:s([i.anchor,"center"],o,l),area:o.chart.chartArea,backgroundColor:s([i.backgroundColor,null],o,l),borderColor:s([i.borderColor,null],o,l),borderRadius:s([i.borderRadius,0],o,l),borderWidth:s([i.borderWidth,0],o,l),clamp:s([i.clamp,!1],o,l),clip:s([i.clip,!1],o,l),color:f,display:e,font:u,lines:r,offset:s([i.offset,0],o,l),opacity:s([i.opacity,1],o,l),origin:y(this._el),padding:h.options.toPadding(s([i.padding,0],o,l)),positioner:(a=this._el,a instanceof t.elements.Arc?c.arc:a instanceof t.elements.Point?c.point:a instanceof t.elements.Rectangle?c.rect:c.fallback),rotation:s([i.rotation,0],o,l)*(Math.PI/180),size:n.textSize(this._ctx,r,u),textAlign:s([i.textAlign,"start"],o,l),textShadowBlur:s([i.textShadowBlur,0],o,l),textShadowColor:s([i.textShadowColor,f],o,l),textStrokeColor:s([i.textStrokeColor,f],o,l),textStrokeWidth:s([i.textStrokeWidth,0],o,l)}},update:function(t){var e,r,i,o=this,a=null,l=null,s=o._index,u=o._config,f=h.options.resolve([u.display,!0],t,s);f&&(e=t.dataset.data[s],r=h.valueOrDefault(h.callback(u.formatter,[e,t]),e),(i=h.isNullOrUndef(r)?[]:n.toTextLines(r)).length&&(l=function(t){var e=t.borderWidth||0,r=t.padding,n=t.size.height,i=t.size.width,o=-i/2,a=-n/2;return{frame:{x:o-r.left-e,y:a-r.top-e,w:i+r.width+2*e,h:n+r.height+2*e},text:{x:o,y:a,w:i,h:n}}}(a=o._modelize(f,i,u,t)))),o._model=a,o._rects=l},geometry:function(){return this._rects?this._rects.frame:{}},rotation:function(){return 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n=r.lineHeight,i=t.w,o=t.x;return"center"===e?o+=i/2:"end"!==e&&"right"!==e||(o+=i),{h:n,w:i,x:o,y:t.y+n/2}}(r,o,s),t.font=s.string,t.textAlign=o,t.textBaseline="middle",t.shadowBlur=n.textShadowBlur,t.shadowColor=n.textShadowColor,l&&(t.fillStyle=a),c&&(t.lineJoin="round",t.lineWidth=d,t.strokeStyle=f),i=0,u=e.length;i<u;++i)v(t,e[i],{stroked:c,filled:l,w:r.w,x:r.x,y:r.y+r.h*i})}(i,o.lines,a.text,o),i.restore())}});var b=t.helpers,p=Number.MIN_SAFE_INTEGER||-9007199254740991,g=Number.MAX_SAFE_INTEGER||9007199254740991;function m(t,e,r){var n=Math.cos(r),i=Math.sin(r),o=e.x,a=e.y;return{x:o+n*(t.x-o)-i*(t.y-a),y:a+i*(t.x-o)+n*(t.y-a)}}function w(t,e){var r,n,i,o,a,l=g,s=p,u=e.origin;for(r=0;r<t.length;++r)i=(n=t[r]).x-u.x,o=n.y-u.y,a=e.vx*i+e.vy*o,l=Math.min(l,a),s=Math.max(s,a);return{min:l,max:s}}function k(t,e){var r=e.x-t.x,n=e.y-t.y,i=Math.sqrt(r*r+n*n);return{vx:(e.x-t.x)/i,vy:(e.y-t.y)/i,origin:t,ln:i}}var M=function(){this._rotation=0,this._rect={x:0,y:0,w:0,h:0}};function S(t,e,r){var n=e.positioner(t,e),i=n.vx,o=n.vy;if(!i&&!o)return{x:n.x,y:n.y};var a=r.w,l=r.h,s=e.rotation,u=Math.abs(a/2*Math.cos(s))+Math.abs(l/2*Math.sin(s)),f=Math.abs(a/2*Math.sin(s))+Math.abs(l/2*Math.cos(s)),d=1/Math.max(Math.abs(i),Math.abs(o));return u*=i*d,f*=o*d,u+=e.offset*i,f+=e.offset*o,{x:n.x+u,y:n.y+f}}b.extend(M.prototype,{center:function(){var t=this._rect;return{x:t.x+t.w/2,y:t.y+t.h/2}},update:function(t,e,r){this._rotation=r,this._rect={x:e.x+t.x,y:e.y+t.y,w:e.w,h:e.h}},contains:function(t){var e=this._rect;return!((t=m(t,this.center(),-this._rotation)).x<e.x-1||t.y<e.y-1||t.x>e.x+e.w+2||t.y>e.y+e.h+2)},intersects:function(t){var e,r,n,i=this._points(),o=t._points(),a=[k(i[0],i[1]),k(i[0],i[3])];for(this._rotation!==t._rotation&&a.push(k(o[0],o[1]),k(o[0],o[3])),e=0;e<a.length;++e)if(r=w(i,a[e]),n=w(o,a[e]),r.max<n.min||n.max<r.min)return!1;return!0},_points:function(){var t=this._rect,e=this._rotation,r=this.center();return[m({x:t.x,y:t.y},r,e),m({x:t.x+t.w,y:t.y},r,e),m({x:t.x+t.w,y:t.y+t.h},r,e),m({x:t.x,y:t.y+t.h},r,e)]}});var C={prepare:function(t){var e,r,n,i,o,a=[];for(e=0,n=t.length;e<n;++e)for(r=0,i=t[e].length;r<i;++r)o=t[e][r],a.push(o),o.$layout={_box:new M,_hidable:!1,_visible:!0,_set:e,_idx:r};return a.sort(function(t,e){var r=t.$layout,n=e.$layout;return r._idx===n._idx?n._set-r._set:n._idx-r._idx}),this.update(a),a},update:function(t){var e,r,n,i,o,a=!1;for(e=0,r=t.length;e<r;++e)i=(n=t[e]).model(),(o=n.$layout)._hidable=i&&"auto"===i.display,o._visible=n.visible(),a|=o._hidable;a&&function(t){var e,r,n,i,o,a;for(e=0,r=t.length;e<r;++e)(i=(n=t[e]).$layout)._visible&&(o=n.geometry(),a=S(n._el._model,n.model(),o),i._box.update(a,o,n.rotation()));(function(t,e){var r,n,i,o;for(r=t.length-1;r>=0;--r)for(i=t[r].$layout,n=r-1;n>=0&&i._visible;--n)(o=t[n].$layout)._visible&&i._box.intersects(o._box)&&e(i,o)})(t,function(t,e){var r=t._hidable,n=e._hidable;r&&n||n?e._visible=!1:r&&(t._visible=!1)})}(t)},lookup:function(t,e){var r,n;for(r=t.length-1;r>=0;--r)if((n=t[r].$layout)&&n._visible&&n._box.contains(e))return t[r];return null},draw:function(t,e){var r,n,i,o,a,l;for(r=0,n=e.length;r<n;++r)(o=(i=e[r]).$layout)._visible&&(a=i.geometry(),l=S(i._el._view,i.model(),a),o._box.update(l,a,i.rotation()),i.draw(t,l))}},z=t.helpers,$={align:"center",anchor:"center",backgroundColor:null,borderColor:null,borderRadius:0,borderWidth:0,clamp:!1,clip:!1,color:void 0,display:!0,font:{family:void 0,lineHeight:1.2,size:void 0,style:void 0,weight:null},formatter:function(t){if(z.isNullOrUndef(t))return null;var e,r,n,i=t;if(z.isObject(t))if(z.isNullOrUndef(t.label))if(z.isNullOrUndef(t.r))for(i="",n=0,r=(e=Object.keys(t)).length;n<r;++n)i+=(0!==n?", ":"")+e[n]+": "+t[e[n]];else i=t.r;else i=t.label;return""+i},labels:void 0,listeners:{},offset:4,opacity:1,padding:{top:4,right:4,bottom:4,left:4},rotation:0,textAlign:"start",textStrokeColor:void 0,textStrokeWidth:0,textShadowBlur:0,textShadowColor:void 0},O=t.helpers,A="$datalabels",D="$default";function P(t,e,r){if(e){var n,i=r.$context,o=r.$groups;e[o._set]&&(n=e[o._set][o._key])&&!0===O.callback(n,[i])&&(t[A]._dirty=!0,r.update(i))}}function N(t,e){var r,n,i=t[A],o=i._listeners;if(o.enter||o.leave){if("mousemove"===e.type)n=C.lookup(i._labels,e);else if("mouseout"!==e.type)return;r=i._hovered,i._hovered=n,function(t,e,r,n){var i,o;(r||n)&&(r?n?r!==n&&(o=i=!0):o=!0:i=!0,o&&P(t,e.leave,r),i&&P(t,e.enter,n))}(t,o,r,n)}}t.defaults.global.plugins.datalabels=$;var R={id:"datalabels",beforeInit:function(t){t[A]={_actives:[]}},beforeUpdate:function(t){var e=t[A];e._listened=!1,e._listeners={},e._datasets=[],e._labels=[]},afterDatasetUpdate:function(t,e,r){var n,i,o,a,l,s,u,f,d=e.index,c=t[A],h=c._datasets[d]=[],x=t.isDatasetVisible(d),y=t.data.datasets[d],v=function(t,e){var r,n,i,o=t.datalabels,a=[];return!1===o?null:(!0===o&&(o={}),e=O.merge({},[e,o]),n=e.labels||{},i=Object.keys(n),delete e.labels,i.length?i.forEach(function(t){n[t]&&a.push(O.merge({},[e,n[t],{_key:t}]))}):a.push(e),r=a.reduce(function(t,e){return O.each(e.listeners||{},function(r,n){t[n]=t[n]||{},t[n][e._key||D]=r}),delete e.listeners,t},{}),{labels:a,listeners:r})}(y,r),b=e.meta.data||[],p=t.ctx;for(p.save(),n=0,o=b.length;n<o;++n)if((u=b[n])[A]=[],x&&u&&!u.hidden&&!u._model.skip)for(i=0,a=v.labels.length;i<a;++i)s=(l=v.labels[i])._key,(f=new _(l,p,u,n)).$groups={_set:d,_key:s||D},f.$context={active:!1,chart:t,dataIndex:n,dataset:y,datasetIndex:d},f.update(f.$context),u[A].push(f),h.push(f);p.restore(),O.merge(c._listeners,v.listeners,{merger:function(t,r,n){r[t]=r[t]||{},r[t][e.index]=n[t],c._listened=!0}})},afterUpdate:function(t,e){t[A]._labels=C.prepare(t[A]._datasets,e)},afterDatasetsDraw:function(t){C.draw(t,t[A]._labels)},beforeEvent:function(t,e){if(t[A]._listened)switch(e.type){case"mousemove":case"mouseout":N(t,e);break;case"click":!function(t,e){var r=t[A],n=r._listeners.click,i=n&&C.lookup(r._labels,e);i&&P(t,n,i)}(t,e)}},afterEvent:function(e){var r,i,o,a,l,s,u,f=e[A],d=f._actives,c=f._actives=e.lastActive||[],h=n.arrayDiff(d,c);for(r=0,i=h.length;r<i;++r)if((l=h[r])[1])for(o=0,a=(u=l[0][A]||[]).length;o<a;++o)(s=u[o]).$context.active=1===l[1],s.update(s.$context);(f._dirty||h.length)&&(C.update(f._labels),function(e){if(!e.animating){for(var r=t.animationService.animations,n=0,i=r.length;n<i;++n)if(r[n].chart===e)return;e.render({duration:1,lazy:!0})}}(e)),delete f._dirty}};return t.plugins.register(R),R});