Simplifying node proxy code

src/js/parser/javascript/match.js

@@ -18,7 +18,6 @@ export default {
         .invoke('addClass', 'anchor');
     }
 
-    if (start || end || this.parts.length !== 1) {
     partPromises = _.map(this.parts, part => {
       return part.render(this.container.group());
     });
@@ -46,9 +45,6 @@ export default {
         this.container.prepend(
           this.container.path(paths.join('')));
       });
-    } else {
-      return this.proxy(this.parts[0]);
-    }
   },
 
   _getAnchor() {
@@ -79,5 +75,9 @@ export default {
 
     this.anchorStart = this.properties.anchor_start.textValue !== '';
     this.anchorEnd = this.properties.anchor_end.textValue !== '';
+
+    if (!this.anchorStart && !this.anchorEnd && this.parts.length === 1) {
+      this.proxy = this.parts[0];
+    }
   }
 };

src/js/parser/javascript/match_fragment.js

@@ -4,9 +4,6 @@ export default {
   type: 'match-fragment',
 
   _render() {
-    if (!this.repeat) {
-      return this.proxy(this.content);
-    } else {
     return this.content.render(this.container.group())
       .then(() => {
         var box, paths = [];
@@ -56,7 +53,6 @@ export default {
             .translate(box.x2 - labelBox.width - labelShift, box.y2 + labelBox.height));
         }
       });
-    }
   },
 
   _getAnchor() {
@@ -76,6 +72,8 @@ export default {
 
     if (this.properties.repeat.textValue !== '') {
       this.repeat = this.properties.repeat;
+    } else {
+      this.proxy = this.content;
     }
   }
 };

src/js/parser/javascript/node.js

@@ -26,8 +26,8 @@ export default class Node {
   }
 
   getAnchor() {
-    if (this._proxy) {
+    if (this.proxy) {
-      return this._proxy.getAnchor();
+      return this.proxy.getAnchor();
     } else {
       return this._getAnchor();
     }
@@ -119,16 +119,15 @@ export default class Node {
       this.setContainer(container);
     }
 
+    if (this.proxy) {
+      return this.proxy.render(this.container)
+        .then(_.constant(this));
+    } else {
       this.startRender();
       return this._render()
         .then(this.doneRender.bind(this))
         .then(_.constant(this));
     }
-
-  proxy(node) {
-    this.anchorDebug = false;
-    this._proxy = node;
-    return node.render(this.container);
   }
 
   spaceHorizontally(items, options) {

src/js/parser/javascript/regexp.js

@@ -7,9 +7,6 @@ export default {
   _render() {
     var matchContainer;
 
-    if (this.matches.length === 1) {
-      return this.proxy(this.matches[0]);
-    } else {
     matchContainer = this.container.group()
       .addClass('regexp-matches')
       .transform(Snap.matrix()
@@ -43,7 +40,6 @@ export default {
             return `M0,${box.ay}h${box.ax}M${box.ax2},${box.ay}H${container.width}`;
           }).join('')));
       });
-    }
   },
 
   makeSideLine(containerBox, match) {
@@ -91,5 +87,9 @@ export default {
       .concat(_.map(this.properties.alternates.elements, element => {
         return element.properties.match;
       }));
+
+    if (this.matches.length === 1) {
+      return this.proxy = this.matches[0];
+    }
   }
 };

src/js/parser/javascript/subexp.js

@@ -12,14 +12,10 @@ export default {
   },
 
   _render() {
-    if (this.label) {
     return this.regexp.render(this.container.group())
       .then(this.renderLabeledBox.bind(this, this.label, this.regexp, {
         padding: 10
       }));
-    } else {
-      return this.proxy(this.regexp);
-    }
   },
 
   resetCounter() {
@@ -45,5 +41,9 @@ export default {
     }
 
     this.regexp = this.properties.regexp;
+
+    if (!this.label) {
+      this.proxy = this.regexp;
+    }
   }
 };