vega-scenegraph - npm Package Compare versions

Comparing version 4.8.2 to 4.8.3

build/vega-scenegraph.min.js

@@ -1,1 +0,1 @@
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o=Wn[n];("transparent"!==i||"fill"!==o&&"stroke"!==o)&&null!=i&&(l(i)&&(i=u(i,r.gradient,"")),t[o]=i)}}(r,e,t,i,this._defs),r},li.href=function(t){var e,n=this,i=t.href;if(i){if(e=n._hrefs&&n._hrefs[i])return e;n.sanitizeURL(i).then(t=>{t["xlink:href"]=t.href,t.href=null,(n._hrefs||(n._hrefs={}))[i]=t})}return null},li.mark=function(t){const n=We[t.marktype],i=n.tag,r=[En,n.attr];let o="";o+=Gn("g",e.extend({class:on(t),"clip-path":t.clip?nt(this,t,t.group):null},In(t),{"pointer-events":"g"!==i&&!1===t.interactive?"none":null}));const s=s=>{const a=this.href(s);if(a&&(o+=Gn("a",a)),o+=Gn(i,this.attr(t,s,r,"g"!==i?i:null)),"text"===i){const t=qe(s);if(e.isArray(t)){const e={x:0,dy:Ne(s)};for(let n=0;n<t.length;++n)o+=Gn("tspan",n?e:null)+ci(De(s,t[n]))+jn("tspan")}else o+=ci(De(s,t))}else if("g"===i){const e=s.strokeForeground,i=s.fill,r=s.stroke;e&&r&&(s.stroke=null),o+=Gn("path",this.attr(t,s,n.background,"bgrect"))+jn("path"),o+=Gn("g",this.attr(t,s,n.content))+this.markGroup(s)+jn("g"),e&&r?(i&&(s.fill=null),s.stroke=r,o+=Gn("path",this.attr(t,s,n.foreground,"bgrect"))+jn("path"),i&&(s.fill=i)):o+=Gn("path",this.attr(t,s,n.foreground,"bgfore"))+jn("path")}o+=jn(i),a&&(o+=jn("a"))};return n.nested?t.items&&t.items.length&&s(t.items[0]):Ht(t,s),o+jn("g")},li.markGroup=function(t){let e="";return Ht(t,t=>{e+=this.mark(t)}),e};var hi={Canvas:"canvas",PNG:"png",SVG:"svg",None:"none"},fi={};function di(t,e,n,i){if(function(t,e,n){return t.bounds&&e.intersects(t.bounds)&&("group"===t.marktype||!1!==t.interactive&&(!n||n(t)))}(t,e,n)){const r=t.items,o=t.marktype,s=r.length;let a=0;if("group"===o)for(;a<s;++a)gi(r[a],e,n,i);else for(const t=We[o].isect;a<s;++a){let n=r[a];pi(n,e,t)&&i.push(n)}}return i}function gi(t,e,n,i){n&&n(t.mark)&&pi(t,e,We.group.isect)&&i.push(t);const r=t.items,o=r&&r.length;if(o){const s=t.x||0,a=t.y||0;e.translate(-s,-a);for(let t=0;t<o;++t)di(r[t],e,n,i);e.translate(s,a)}return i}function pi(t,e,n){const i=t.bounds;return e.encloses(i)||e.intersects(i)&&n(t,e)}fi.canvas=fi.png={renderer:Cn,headless:Cn,handler:bn},fi.svg={renderer:Fn,headless:ai,handler:Pn},fi.none={};var vi=new it;function yi(t,n,i){return t===n||("path"===i?_i(t,n):t instanceof Date&&n instanceof Date?+t==+n:e.isNumber(t)&&e.isNumber(n)?Math.abs(t-n)<=1e-9:t&&n&&(e.isObject(t)||e.isObject(n))?null!=t&&null!=n&&function(t,e){var n,i,r=Object.keys(t),o=Object.keys(e);if(r.length!==o.length)return!1;for(r.sort(),o.sort(),i=r.length-1;i>=0;i--)if(r[i]!=o[i])return!1;for(i=r.length-1;i>=0;i--)if(n=r[i],!yi(t[n],e[n],n))return!1;return typeof t==typeof e}(t,n):t==n)}function _i(t,e){return yi(p(t),p(e))}t.Bounds=it,t.CanvasHandler=bn,t.CanvasRenderer=Cn,t.Gradient=function(t,e){var n,i=[];return n={gradient:"linear",x1:t?t[0]:0,y1:t?t[1]:0,x2:e?e[0]:1,y2:e?e[1]:0,stops:i,stop:function(t,e){return i.push({offset:t,color:e}),n}}},t.GroupItem=st,t.Handler=an,t.Item=ot,t.Marks=We,t.RenderType=hi,t.Renderer=cn,t.ResourceLoader=at,t.SVGHandler=Pn,t.SVGRenderer=Fn,t.SVGStringRenderer=ai,t.Scenegraph=Qe,t.boundClip=function(t){var n=t.clip;if(e.isFunction(n))n(vt(vi.clear()));else{if(!n)return;vi.set(0,0,t.group.width,t.group.height)}t.bounds.intersect(vi)},t.boundContext=vt,t.boundItem=Ue,t.boundMark=Fe,t.boundStroke=ht,t.closeTag=jn,t.domChild=nn,t.domClear=rn,t.domCreate=tn,t.domFind=en,t.font=Ie,t.fontFamily=Ee,t.fontSize=Oe,t.intersect=function(t,n,i){const r=[],o=(new it).union(n),s=t.marktype;return s?di(t,o,i,r):"group"===s?gi(t,o,i,r):e.error("Intersect scene must be mark node or group item.")},t.intersectBoxLine=St,t.intersectPath=Ct,t.intersectPoint=Rt,t.intersectRule=Pt,t.lineHeight=Ne,t.multiLineOffset=function(t){const n=qe(t);return(e.isArray(n)?n.length-1:0)*Ne(t)},t.openTag=Gn,t.pathCurves=f,t.pathEqual=_i,t.pathParse=p,t.pathRectangle=B,t.pathRender=M,t.pathSymbols=P,t.pathTrail=V,t.point=sn,t.renderModule=function(t,e){return t=String(t||"").toLowerCase(),arguments.length>1?(fi[t]=e,this):fi[t]},t.resetSVGClipId=et,t.resetSVGDefIds=function(){et(),a=0},t.sceneEqual=yi,t.sceneFromJSON=$e,t.scenePickVisit=Gt,t.sceneToJSON=Je,t.sceneVisit=Ht,t.sceneZOrder=Vt,t.textMetrics=Ce,Object.defineProperty(t,"__esModule",{value:!0})}));

package.json

 {
   "name": "vega-scenegraph",
-  "version": "4.8.2",
+  "version": "4.8.3",
   "description": "Vega scenegraph and renderers.",
@@ -29,3 +29,3 @@ "license": "BSD-3-Clause",
   },
-  "gitHead": "8a45e2a1ef1716b51b076ca3c868405528ab41a7"
+  "gitHead": "8fe8d36961c128df8300e6bc4fe6aac1e537bbe0"
 }

schema.js

@@ -195,3 +195,3 @@ function duplicate(_) {
   'color',
-  'luminosity',
+  'luminosity'
 ];
@@ -225,3 +225,3 @@
     'ariaRole': { 'type': 'string' },
-    'ariaRoleDescription': { 'type': 'string' },
+    'ariaRoleDescription': { 'type': 'string' }
   }
@@ -228,0 +228,0 @@ };

src/marks/group.js

 import {hasCornerRadius, rectangle} from '../path/shapes';
 import boundStroke from '../bound/boundStroke';
 import {intersectRect} from '../util/intersect';
+import value from '../util/value';
 import {pickVisit, visit} from '../util/visit';
@@ -14,3 +15,3 @@ import blend from '../util/canvas/blend';
 function offset(item) {
-  var sw = (sw = item.strokeWidth) != null ? sw : 1;
+  const sw = value(item.strokeWidth, 1);
   return item.strokeOffset != null ? item.strokeOffset
@@ -26,3 +27,3 @@ : item.stroke && sw > 0.5 && sw < 1.5 ? 0.5 - Math.abs(sw - 1)
 function emitRectangle(emit, item) {
-  var off = offset(item);
+  const off = offset(item);
   emit('d', rectangle(null, item, off, off));
@@ -48,3 +49,3 @@ }
 function content(emit, item, renderer) {
-  var url = item.clip ? clip(renderer, item, item) : null;
+  const url = item.clip ? clip(renderer, item, item) : null;
   emit('clip-path', url);
@@ -55,4 +56,4 @@ }
   if (!group.clip && group.items) {
-    var items = group.items;
-    for (var j=0, m=items.length; j<m; ++j) {
+    const items = group.items, m = items.length;
+    for (let j=0; j<m; ++j) {
       bounds.union(items[j].bounds);
@@ -72,3 +73,3 @@ }
 function rectanglePath(context, group, x, y) {
-  var off = offset(group);
+  const off = offset(group);
   context.beginPath();
@@ -78,14 +79,12 @@ rectangle(context, group, (x || 0) + off, (y || 0) + off);
 
-var hitBackground = hitPath(rectanglePath);
-var hitForeground = hitPath(rectanglePath, false);
+const hitBackground = hitPath(rectanglePath);
+const hitForeground = hitPath(rectanglePath, false);
 
 function draw(context, scene, bounds) {
-  var renderer = this;
+  visit(scene, group => {
+    const gx = group.x || 0,
+          gy = group.y || 0,
+          fore = group.strokeForeground,
+          opacity = group.opacity == null ? 1 : group.opacity;
 
-  visit(scene, function(group) {
-    var gx = group.x || 0,
-        gy = group.y || 0,
-        fore = group.strokeForeground,
-        opacity = group.opacity == null ? 1 : group.opacity;
-
     // draw group background
@@ -110,4 +109,4 @@ if ((group.stroke || group.fill) && opacity) {
     // draw group contents
-    visit(group, function(item) {
-      renderer.draw(context, item, bounds);
+    visit(group, item => {
+      this.draw(context, item, bounds);
     });
@@ -135,8 +134,7 @@
 
-  var handler = this,
-      cx = x * context.pixelRatio,
-      cy = y * context.pixelRatio;
+  const cx = x * context.pixelRatio,
+        cy = y * context.pixelRatio;
 
-  return pickVisit(scene, function(group) {
-    var hit, fore, ix, dx, dy, dw, dh, b, c;
+  return pickVisit(scene, group => {
+    let hit, fore, ix, dx, dy, dw, dh, b, c;
 
@@ -153,3 +151,3 @@ // first hit test bounding box
     c = group.clip;
-    if (c && (gx < dx || gx > dw || gy < dx || gy > dh)) return;
+    if (c && (gx < dx || gx > dw || gy < dy || gy > dh)) return;
 
@@ -179,7 +177,6 @@ // adjust coordinate system
     // hit test against contained marks
-    hit = pickVisit(group, function(mark) {
-      return pickMark(mark, dx, dy)
-        ? handler.pick(mark, x, y, dx, dy)
-        : null;
-    });
+    hit = pickVisit(group, mark => pickMark(mark, dx, dy)
+      ? this.pick(mark, x, y, dx, dy)
+      : null
+    );
 
@@ -186,0 +183,0 @@ // hit test against group background

src/marks/image.js

 import {visit} from '../util/visit';
 import blend from '../util/canvas/blend';
 import {pick} from '../util/canvas/pick';
+import metadata from '../util/svg/metadata';
 import {translate} from '../util/svg/transform';
@@ -42,33 +43,23 @@ import {truthy} from 'vega-util';
 function attr(emit, item, renderer) {
-  var image = getImage(item, renderer),
-      x = item.x || 0,
-      y = item.y || 0,
-      w = imageWidth(item, image),
-      h = imageHeight(item, image),
-      a = item.aspect === false ? 'none' : 'xMidYMid';
+  const img = getImage(item, renderer),
+        w = imageWidth(item, img),
+        h = imageHeight(item, img),
+        x = (item.x || 0) - imageXOffset(item.align, w),
+        y = (item.y || 0) - imageYOffset(item.baseline, h),
+        i = !img.src && img.toDataURL ? img.toDataURL() : img.src || '';
 
-  x -= imageXOffset(item.align, w);
-  y -= imageYOffset(item.baseline, h);
-
-  if (!image.src && image.toDataURL) {
-    emit('href', image.toDataURL(), 'http://www.w3.org/1999/xlink', 'xlink:href');
-  } else {
-    emit('href', image.src || '', 'http://www.w3.org/1999/xlink', 'xlink:href');
-  }
+  emit('href', i, metadata['xmlns:xlink'], 'xlink:href');
   emit('transform', translate(x, y));
   emit('width', w);
   emit('height', h);
-  emit('preserveAspectRatio', a);
+  emit('preserveAspectRatio', item.aspect === false ? 'none' : 'xMidYMid');
 }
 
 function bound(bounds, item) {
-  var image = item.image,
-      x = item.x || 0,
-      y = item.y || 0,
-      w = imageWidth(item, image),
-      h = imageHeight(item, image);
+  const img = item.image,
+        w = imageWidth(item, img),
+        h = imageHeight(item, img),
+        x = (item.x || 0) - imageXOffset(item.align, w),
+        y = (item.y || 0) - imageYOffset(item.baseline, h);
 
-  x -= imageXOffset(item.align, w);
-  y -= imageYOffset(item.baseline, h);
-
   return bounds.set(x, y, x + w, y + h);
@@ -78,19 +69,14 @@ }
 function draw(context, scene, bounds) {
-  var renderer = this;
-
-  visit(scene, function(item) {
+  visit(scene, item => {
     if (bounds && !bounds.intersects(item.bounds)) return; // bounds check
 
-    var image = getImage(item, renderer),
-        x = item.x || 0,
-        y = item.y || 0,
-        w = imageWidth(item, image),
-        h = imageHeight(item, image),
+    let img = getImage(item, this),
+        w = imageWidth(item, img),
+        h = imageHeight(item, img),
+        x = (item.x || 0) - imageXOffset(item.align, w),
+        y = (item.y || 0) - imageYOffset(item.baseline, h),
         opacity, ar0, ar1, t;
 
-    x -= imageXOffset(item.align, w);
-    y -= imageYOffset(item.baseline, h);
-
     if (item.aspect !== false) {
-      ar0 = image.width / image.height;
+      ar0 = img.width / img.height;
       ar1 = item.width / item.height;
@@ -110,7 +96,7 @@ if (ar0 === ar0 && ar1 === ar1 && ar0 !== ar1) {
 
-    if (image.complete || image.toDataURL) {
+    if (img.complete || img.toDataURL) {
       blend(context, item);
       context.globalAlpha = (opacity = item.opacity) != null ? opacity : 1;
       context.imageSmoothingEnabled = item.smooth !== false;
-      context.drawImage(image, x, y, w, h);
+      context.drawImage(img, x, y, w, h);
     }
@@ -117,0 +103,0 @@ });

src/Scenegraph.js

@@ -42,3 +42,3 @@ import Bounds from './Bounds';
     role:        def.role || undefined,
-    zindex:      def.zindex || 0,
+    zindex:      def.zindex || 0
   };
@@ -45,0 +45,0 @@

src/SVGRenderer.js

@@ -11,6 +11,6 @@ import Renderer from './Renderer';
 import metadata from './util/svg/metadata';
-import {defaultCSS, styles, svgRootClass} from './util/svg/styles';
+import {rootAttributes, styles} from './util/svg/styles';
 import {inherits, isArray} from 'vega-util';
 
-const RootIndex = 1,
+const RootIndex = 0,
       ns = metadata.xmlns;
@@ -42,12 +42,7 @@
 
-    // create SVG defs element
-    this._defs.el = domChild(this._svg, 0, 'defs', ns);
-
-    // set svg default styles
-    const style = domChild(this._defs.el, 0, 'style');
-    style.textContent = defaultCSS;
-
     // set the svg root group
     this._root = domChild(this._svg, RootIndex, 'g', ns);
-    this._root.setAttribute('class', svgRootClass);
+    for (const attr in rootAttributes) {
+      this._root.setAttribute(attr, rootAttributes[attr]);
+    }
 
@@ -107,7 +102,7 @@ // ensure no additional child elements
         height: this._height,
-        style:  'fill: ' + this._bgcolor + ';'
+        fill:   this._bgcolor
       }) + closeTag('rect'));
 
   return openTag('svg', attr)
-    + this._defs.el.outerHTML
+    + (this._defs.el ? this._defs.el.outerHTML : '')
     + bg
@@ -140,11 +135,15 @@ + this._root.outerHTML
 prototype.updateDefs = function() {
-  var defs = this._defs,
-      el = defs.el,
-      index = 1, id;
+  const svg = this._svg,
+        defs = this._defs;
 
-  for (id in defs.gradient) {
+  let el = defs.el,
+      index = 0;
+
+  for (const id in defs.gradient) {
+    if (!el) defs.el = (el = domChild(svg, RootIndex, 'defs', ns));
     index = updateGradient(el, defs.gradient[id], index);
   }
 
-  for (id in defs.clipping) {
+  for (const id in defs.clipping) {
+    if (!el) defs.el = (el = domChild(svg, RootIndex, 'defs', ns));
     index = updateClipping(el, defs.clipping[id], index);
@@ -154,3 +153,7 @@ }
   // clean-up
-  domClear(el, index);
+  if (el) {
+    index === 0
+      ? (svg.removeChild(el), defs.el = null)
+      : domClear(el, index);
+  }
 };
@@ -176,3 +179,3 @@
     pt.setAttribute('height', '1');
-    pt.setAttribute('style', 'fill: url(' + href() + '#' + grad.id + ');');
+    pt.setAttribute('fill', 'url(' + href() + '#' + grad.id + ')');
 
@@ -320,4 +323,3 @@ el = domChild(el, index++, 'radialGradient', ns);
 
-  var renderer = this,
-      svg = this._svg,
+  var svg = this._svg,
       mdef = marks[scene.marktype],
@@ -338,14 +340,14 @@ events = scene.interactive === false ? 'none' : null,
   if (!isGroup) {
-    parent.style.setProperty('pointer-events', events);
+    setAttribute(parent, 'pointer-events', events);
   }
-  setAttribute(parent, 'clip-path', scene.clip
-    ? clip(renderer, scene, scene.group) : null);
+  setAttribute(parent, 'clip-path',
+    scene.clip ? clip(this, scene, scene.group) : null);
 
-  function process(item) {
-    var dirty = renderer.isDirty(item),
-        node = bind(item, parent, sibling, mdef.tag, svg);
+  const process = item => {
+    const dirty = this.isDirty(item),
+          node = bind(item, parent, sibling, mdef.tag, svg);
 
     if (dirty) {
-      renderer._update(mdef, node, item);
-      if (isGroup) recurse(renderer, node, item);
+      this._update(mdef, node, item);
+      if (isGroup) recurse(this, node, item);
     }
@@ -355,3 +357,3 @@
     ++i;
-  }
+  };
 
@@ -371,5 +373,5 @@ if (mdef.nested) {
   el = el.lastChild.previousSibling;
-  var prev, idx = 0;
+  let prev, idx = 0;
 
-  visit(group, function(item) {
+  visit(group, item => {
     prev = renderer.draw(el, item, prev);
@@ -386,3 +388,3 @@ ++idx;
 function bind(item, el, sibling, tag, svg) {
-  var node = item._svg, doc;
+  let node = item._svg, doc;
 
@@ -401,11 +403,11 @@ // create a new dom node if needed
       if (tag === 'g') {
-        var bg = domCreate(doc, 'path', ns);
+        const bg = domCreate(doc, 'path', ns);
         node.appendChild(bg);
         bg.__data__ = item;
 
-        var cg = domCreate(doc, 'g', ns);
+        const cg = domCreate(doc, 'g', ns);
         node.appendChild(cg);
         cg.__data__ = item;
 
-        var fg = domCreate(doc, 'path', ns);
+        const fg = domCreate(doc, 'path', ns);
         node.appendChild(fg);
@@ -441,5 +443,3 @@ fg.__data__ = item;
   group: function(mdef, el, item) {
-    var fg, bg;
-
-    element = fg = el.childNodes[2];
+    const fg = element = el.childNodes[2];
     values = fg.__values__;
@@ -452,9 +452,9 @@ mdef.foreground(emit, item, this);
 
-    element = bg = el.childNodes[0];
+    const bg = element = el.childNodes[0];
     mdef.background(emit, item, this);
 
-    var value = item.mark.interactive === false ? 'none' : null;
+    const value = item.mark.interactive === false ? 'none' : null;
     if (value !== values.events) {
-      fg.style.setProperty('pointer-events', value);
-      bg.style.setProperty('pointer-events', value);
+      setAttribute(fg, 'pointer-events', value);
+      setAttribute(bg, 'pointer-events', value);
       values.events = value;
@@ -465,7 +465,7 @@ }
       const fill = item.fill;
-      fg.style.removeProperty('display');
+      setAttribute(fg, 'display', null);
 
       // set style of background
       this.style(bg, item);
-      bg.style.removeProperty('stroke');
+      setAttribute(bg, 'stroke', null);
 
@@ -482,3 +482,3 @@ // set style of foreground
       // ensure foreground is ignored
-      fg.style.setProperty('display', 'none');
+      setAttribute(fg, 'display', 'none');
     }
@@ -495,3 +495,3 @@ },
   text: function(mdef, el, item) {
-    var tl = textLines(item),
+    let tl = textLines(item),
         key, value, doc, lh;
@@ -529,7 +529,7 @@
 
-    setStyle(el, 'font-family', fontFamily(item));
-    setStyle(el, 'font-size', fontSize(item) + 'px');
-    setStyle(el, 'font-style', item.fontStyle);
-    setStyle(el, 'font-variant', item.fontVariant);
-    setStyle(el, 'font-weight', item.fontWeight);
+    setAttribute(el, 'font-family', fontFamily(item));
+    setAttribute(el, 'font-size', fontSize(item) + 'px');
+    setAttribute(el, 'font-style', item.fontStyle);
+    setAttribute(el, 'font-variant', item.fontVariant);
+    setAttribute(el, 'font-weight', item.fontWeight);
   }
@@ -562,6 +562,6 @@ };
   // some marks need special treatment
-  var extra = mark_extras[mdef.type];
+  const extra = mark_extras[mdef.type];
   if (extra) extra.call(this, mdef, el, item);
 
-  // apply svg css styles
+  // apply svg style attributes
   // note: element may be modified by 'extra' method
@@ -615,3 +615,3 @@ if (element) this.style(element, item);
     if (value == null) {
-      el.style.removeProperty(name);
+      el.removeAttribute(name);
     } else {
@@ -621,3 +621,3 @@ if (isGradient(value)) {
       }
-      el.style.setProperty(name, value + '');
+      el.setAttribute(name, value + '');
     }
@@ -630,3 +630,3 @@
 function href() {
-  var loc;
+  let loc;
   return typeof window === 'undefined' ? ''
@@ -633,0 +633,0 @@ : (loc = window.location).hash ? loc.href.slice(0, -loc.hash.length)

src/SVGStringRenderer.js

@@ -11,4 +11,4 @@ import Renderer from './Renderer';
 import metadata from './util/svg/metadata';
-import {defaultCSS, styles, svgRootClass} from './util/svg/styles';
-import {inherits, isArray} from 'vega-util';
+import {rootAttributes, styles} from './util/svg/styles';
+import {extend, inherits, isArray} from 'vega-util';
 
@@ -60,3 +60,3 @@ export default function SVGStringRenderer(loader) {
       height: this._height,
-      style:  'fill: ' + bg + ';'
+      fill:   bg
     }) + closeTag('rect');
@@ -67,6 +67,5 @@ } else {
 
-  t.root = openTag('g', {
-    class: svgRootClass,
-    transform: 'translate(' + o + ')'
-  });
+  t.root = openTag('g', extend(
+    {}, rootAttributes, {transform: 'translate(' + o + ')'}
+  ));
 
@@ -98,9 +97,7 @@ t.foot = closeTag('g') + closeTag('svg');
 prototype.buildDefs = function() {
-  var all = this._defs,
-      defs = openTag('style') + defaultCSS + closeTag('style'),
-      i, id, def, tag, stops;
+  let defs = '', tag;
 
-  for (id in all.gradient) {
-    def = all.gradient[id];
-    stops = def.stops;
+  for (const id in this._defs.gradient) {
+    const def = this._defs.gradient[id],
+          stops = def.stops;
 
@@ -122,5 +119,5 @@ if (def.gradient === 'radial') {
       defs += openTag('rect', {
-        width: '1',
+        width:  '1',
         height: '1',
-        style: 'fill: url(#' + id + ');'
+        fill:   'url(#' + id + ')'
       }) + closeTag('rect');
@@ -149,3 +146,3 @@
 
-    for (i=0; i<stops.length; ++i) {
+    for (let i = 0; i < stops.length; ++i) {
       defs += openTag('stop', {
@@ -160,4 +157,4 @@ offset: stops[i].offset,
 
-  for (id in all.clipping) {
-    def = all.clipping[id];
+  for (const id in this._defs.clipping) {
+    const def = this._defs.clipping[id];
 
@@ -182,18 +179,23 @@ defs += openTag('clipPath', {id: id});
 
-  return openTag('defs') + defs + closeTag('defs');
+  return defs ? (openTag('defs') + defs + closeTag('defs')) : '';
 };
 
-var object;
+prototype.attr = function(scene, item, attrs, tag) {
+  const object = {},
+        emit = (name, value, ns, prefixed) => {
+          object[prefixed || name] = value;
+        };
 
-function emit(name, value, ns, prefixed) {
-  object[prefixed || name] = value;
-}
-
-prototype.attributes = function(attr, item) {
-  object = {};
-  if (Array.isArray(attr)) {
-    attr.forEach(fn => fn(emit, item, this));
+  // apply mark specific attributes
+  if (Array.isArray(attrs)) {
+    attrs.forEach(fn => fn(emit, item, this));
   } else {
-    attr(emit, item, this);
+    attrs(emit, item, this);
   }
+
+  // apply style attributes
+  if (tag) {
+    applyStyles(object, item, scene, tag, this._defs);
+  }
+
   return object;
@@ -224,29 +226,28 @@ };
 prototype.mark = function(scene) {
-  var renderer = this,
-      mdef = marks[scene.marktype],
-      tag  = mdef.tag,
-      defs = this._defs,
-      str = '',
-      style;
+  const mdef = marks[scene.marktype],
+        tag  = mdef.tag,
+        attrList = [ariaItemAttributes, mdef.attr];
 
-  if (tag !== 'g' && scene.interactive === false) {
-    style = 'style="pointer-events: none;"';
-  }
+  let str = '';
 
   // render opening group tag
-  str += openTag('g', Object.assign({
-    'class': cssClass(scene),
-    'clip-path': scene.clip ? clip(renderer, scene, scene.group) : null
-  }, ariaMarkAttributes(scene)), style);
+  str += openTag('g', extend(
+    {
+      'class': cssClass(scene),
+      'clip-path': scene.clip ? clip(this, scene, scene.group) : null
+    },
+    ariaMarkAttributes(scene),
+    {
+      'pointer-events': tag !== 'g' && scene.interactive === false ? 'none' : null
+    }
+  ));
 
   // render contained elements
-  function process(item) {
-    var href = renderer.href(item);
+  const process = item => {
+    const href = this.href(item);
     if (href) str += openTag('a', href);
 
-    style = (tag !== 'g') ? applyStyles(item, scene, tag, defs) : null;
     str += openTag(
       tag,
-      renderer.attributes([ariaItemAttributes, mdef.attr], item),
-      style
+      this.attr(scene, item, attrList, tag !== 'g' ? tag : null)
     );
@@ -277,7 +278,9 @@
 
-      str += openTag('path', renderer.attributes(mdef.background, item),
-        applyStyles(item, scene, 'bgrect', defs)) + closeTag('path');
+      str += openTag(
+        'path',
+        this.attr(scene, item, mdef.background, 'bgrect')
+      ) + closeTag('path');
 
-      str += openTag('g', renderer.attributes(mdef.content, item))
-        + renderer.markGroup(item)
+      str += openTag('g', this.attr(scene, item, mdef.content))
+        + this.markGroup(item)
         + closeTag('g');
@@ -289,9 +292,13 @@
 
-        str += openTag('path', renderer.attributes(mdef.foreground, item),
-          applyStyles(item, scene, 'bgrect', defs)) + closeTag('path');
+        str += openTag(
+          'path',
+          this.attr(scene, item, mdef.foreground, 'bgrect')
+        ) + closeTag('path');
 
         if (fill) item.fill = fill;
       } else {
-        str += openTag('path', renderer.attributes(mdef.foreground, item),
-          applyStyles({}, scene, 'bgfore', defs)) + closeTag('path');
+        str += openTag(
+          'path',
+          this.attr(scene, item, mdef.foreground, 'bgfore')
+        ) + closeTag('path');
       }
@@ -302,3 +309,3 @@ }
     if (href) str += closeTag('a');
-  }
+  };
 
@@ -316,43 +323,36 @@ if (mdef.nested) {
 prototype.markGroup = function(scene) {
-  var renderer = this,
-      str = '';
-
-  visit(scene, function(item) {
-    str += renderer.mark(item);
-  });
-
+  let str = '';
+  visit(scene, item => { str += this.mark(item); });
   return str;
 };
 
-function applyStyles(o, mark, tag, defs) {
-  if (o == null) return '';
-  let s = '';
+function applyStyles(s, item, scene, tag, defs) {
+  if (item == null) return s;
 
-  if (tag === 'bgrect' && mark.interactive === false) {
-    s += 'pointer-events: none; ';
+  if (tag === 'bgrect' && scene.interactive === false) {
+    s['pointer-events'] = 'none';
   }
 
   if (tag === 'bgfore') {
-    if (mark.interactive === false) {
-      s += 'pointer-events: none; ';
+    if (scene.interactive === false) {
+      s['pointer-events'] = 'none';
     }
-    s += 'display: none; ';
+    s.display = 'none';
+    if (item.fill !== null) return s;
   }
 
-  if (tag === 'image') {
-    if (o.smooth === false) {
-      s += 'image-rendering: optimizeSpeed; image-rendering: pixelated; ';
-    }
+  if (tag === 'image' && item.smooth === false) {
+    s.style = 'image-rendering: optimizeSpeed; image-rendering: pixelated;';
   }
 
   if (tag === 'text') {
-    s += 'font-family: ' + fontFamily(o) + '; ';
-    s += 'font-size: ' + fontSize(o) + 'px; ';
-    if (o.fontStyle) s += 'font-style: ' + o.fontStyle + '; ';
-    if (o.fontVariant) s += 'font-variant: ' + o.fontVariant + '; ';
-    if (o.fontWeight) s += 'font-weight: ' + o.fontWeight + '; ';
+    s['font-family'] = fontFamily(item);
+    s['font-size'] = fontSize(item) + 'px';
+    if (item.fontStyle) s['font-style'] = item.fontStyle;
+    if (item.fontVariant) s['font-variant'] = item.fontVariant;
+    if (item.fontWeight) s['font-weight'] = item.fontWeight;
   }
 
   for (const prop in styles) {
-    let value = o[prop];
+    let value = item[prop];
     const name = styles[prop];
@@ -367,7 +367,7 @@
       }
-      s += name + ': ' + value + '; ';
+      s[name] = value;
     }
   }
 
-  return s ? 'style="' + s.trim() + '"' : null;
+  return s;
 }
@@ -374,0 +374,0 @@

src/util/canvas/gradient.js

@@ -0,7 +1,4 @@
+import value from '../value';
 import {canvas} from 'vega-canvas';
 
-function v(value, dflt) {
-  return value == null ? dflt : value;
-}
-
 function addStops(gradient, stops) {
@@ -23,14 +20,14 @@ const n = stops.length;
     gradient = context.createRadialGradient(
-      bounds.x1 + v(spec.x1, 0.5) * w,
-      bounds.y1 + v(spec.y1, 0.5) * h,
-      Math.max(w, h) * v(spec.r1, 0),
-      bounds.x1 + v(spec.x2, 0.5) * w,
-      bounds.y1 + v(spec.y2, 0.5) * h,
-      Math.max(w, h) * v(spec.r2, 0.5)
+      bounds.x1 + value(spec.x1, 0.5) * w,
+      bounds.y1 + value(spec.y1, 0.5) * h,
+      Math.max(w, h) * value(spec.r1, 0),
+      bounds.x1 + value(spec.x2, 0.5) * w,
+      bounds.y1 + value(spec.y2, 0.5) * h,
+      Math.max(w, h) * value(spec.r2, 0.5)
     );
   } else { // linear gradient
-    const x1 = v(spec.x1, 0),
-          y1 = v(spec.y1, 0),
-          x2 = v(spec.x2, 1),
-          y2 = v(spec.y2, 0);
+    const x1 = value(spec.x1, 0),
+          y1 = value(spec.y1, 0),
+          x2 = value(spec.x2, 1),
+          y2 = value(spec.y2, 0);
 
@@ -37,0 +34,0 @@ if (x1 === x2 || y1 === y2 || w === h) {

src/util/serialize.js

@@ -22,3 +22,3 @@ import boundMark from '../bound/boundMark';
   'font', 'fontSize', 'fontWeight', 'fontStyle', 'fontVariant', // font
-  'description', 'aria', 'ariaRole', 'ariaRoleDescription',     // aria
+  'description', 'aria', 'ariaRole', 'ariaRoleDescription'      // aria
 ];
@@ -25,0 +25,0 @@

src/util/svg/styles.js

 export const styles = {
-  'fill':             'fill',
-  'fillOpacity':      'fill-opacity',
-  'stroke':           'stroke',
-  'strokeOpacity':    'stroke-opacity',
-  'strokeWidth':      'stroke-width',
-  'strokeCap':        'stroke-linecap',
-  'strokeJoin':       'stroke-linejoin',
-  'strokeDash':       'stroke-dasharray',
-  'strokeDashOffset': 'stroke-dashoffset',
-  'strokeMiterLimit': 'stroke-miterlimit',
-  'opacity':          'opacity',
-  'blend':            'mix-blend-mode'
+  fill:             'fill',
+  fillOpacity:      'fill-opacity',
+  stroke:           'stroke',
+  strokeOpacity:    'stroke-opacity',
+  strokeWidth:      'stroke-width',
+  strokeCap:        'stroke-linecap',
+  strokeJoin:       'stroke-linejoin',
+  strokeDash:       'stroke-dasharray',
+  strokeDashOffset: 'stroke-dashoffset',
+  strokeMiterLimit: 'stroke-miterlimit',
+  opacity:          'opacity',
+  blend:            'mix-blend-mode'
 };
 
-export const svgRootClass = 'vega-svg-root';
-
 // ensure miter limit default is consistent with canvas (#2498)
-export const defaultCSS = [
-  `.${svgRootClass} * { fill: none; }`,
-  `.${svgRootClass} tspan { fill: inherit; }`,
-  `.${svgRootClass} path { stroke-miterlimit: 10; }`
-].join(' ');
+export const rootAttributes = {
+  'fill': 'none',
+  'stroke-miterlimit': 10
+};

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