Simplifying code related to passing rendering through to nested node

src/js/parser/javascript/any_character.js

@@ -4,7 +4,7 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'any-character',
 
-  render() {
+  _render() {
     this.label = this.renderLabel(this.container, 'any character');
   }
 });

src/js/parser/javascript/base.js

@@ -39,6 +39,24 @@ export default {
   },
 
   render() {
+    this._render();
+  },
+
+  position() {
+    if (this._proxy) {
+      this._proxy.position();
+    } else {
+      this._position();
+    }
+  },
+
+  proxy(node) {
+    this._proxy = node;
+    this._proxy.setContainer(this.container);
+    this._proxy.render();
+  },
+
+  _render() {
     console.log(this);
 
     this.container.addClass('placeholder');
@@ -51,7 +69,7 @@ export default {
     });
   },
 
-  position() {
+  _position() {
     this.positionLabel(this.label);
   },
 

src/js/parser/javascript/charset.js

@@ -4,7 +4,7 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'charset',
 
-  render() {
+  _render() {
     this.renderLabeledBox(this.invert() ? 'None of:' : 'One of:');
 
     this.partContainer = this.container.group();
@@ -15,7 +15,7 @@ export default _.extend({}, Base, {
     }).bind(this));
   },
 
-  position() {
+  _position() {
     _.invoke(this.parts.elements, 'position');
 
     this.spaceVertically(this.parts.elements, {

src/js/parser/javascript/charset_range.js

@@ -4,7 +4,7 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'charset-range',
 
-  render() {
+  _render() {
     this.first.setContainer(this.container.group());
     this.first.render();
 
@@ -17,7 +17,7 @@ export default _.extend({}, Base, {
       });
   },
 
-  position() {
+  _position() {
     var box;
 
     this.first.position();

src/js/parser/javascript/escape.js

@@ -12,7 +12,7 @@ export default _.extend({}, Base, {
     return this.esc.arg.textValue;
   },
 
-  render() {
+  _render() {
     this.label = this.renderLabel(this.container, _.result(this, this.code()));
 
     this.label.select('rect').attr({

src/js/parser/javascript/literal.js

@@ -4,7 +4,7 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'literal',
 
-  render() {
+  _render() {
     this.label = this.renderLabel(this.container, '"' + this.literal.textValue + '"');
 
     this.label.select('rect').attr({

src/js/parser/javascript/match.js

@@ -4,7 +4,7 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'match',
 
-  render() {
+  _render() {
     var parts = this.parts();
 
     if (this.anchorStart() || this.anchorEnd() || parts.length !== 1) {
@@ -26,16 +26,13 @@ export default _.extend({}, Base, {
           .addClass('anchor');
       }
     } else {
-      this.content = parts[0];
+      this.proxy(parts[0]);
-      this.content.setContainer(this.container);
-      this.content.render();
     }
   },
 
-  position() {
+  _position() {
     var items;
 
-    if (this.contents) {
     if (this.contents.anchor_start) {
       this.positionLabel(this.contents.anchor_start);
     }
@@ -50,9 +47,6 @@ export default _.extend({}, Base, {
     this.spaceHorizontally(items, {
       padding: 10
     });
-    } else {
-      this.content.position();
-    }
   },
 
   anchorStart() {

src/js/parser/javascript/match_fragment.js

@@ -4,21 +4,19 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'match-fragment',
 
-  render() {
+  _render() {
     if (this._repeat.textValue === '') {
-      this._content.setContainer(this.container);
+      this.proxy(this._content);
     } else {
       this._content.setContainer(this.container.group());
-    }
       this._content.render();
+    }
   },
 
-  position() {
+  _position() {
     var box, paths = [];
 
     this._content.position();
-
-    if (this._repeat.textValue !== '') {
     this._content.container.transform(this._repeat.contentPosition());
 
     box = this._content.getBBox();
@@ -40,5 +38,4 @@ export default _.extend({}, Base, {
       this.container.path(paths.join(''));
     }
   }
-  }
 });

src/js/parser/javascript/regexp.js

@@ -4,12 +4,11 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'regexp',
 
-  render() {
+  _render() {
     var matches = this.matches();
 
     if (matches.length === 1) {
-      matches[0].setContainer(this.container);
+      this.proxy(matches[0]);
-      matches[0].render();
     } else {
       this.matchContainer = this.container.group()
         .addClass('regexp-matches');
@@ -22,15 +21,13 @@ export default _.extend({}, Base, {
     }
   },
 
-  position() {
+  _position() {
     var matches = this.matches(),
-        includeLines = (matches.length > 1),
         containerBox,
         paths;
 
     _.invoke(matches, 'position');
 
-    if (includeLines) {
     this.spaceVertically(matches, {
       padding: 5
     });
@@ -81,7 +78,6 @@ export default _.extend({}, Base, {
     }));
 
     this.container.prepend(this.container.path(paths.join('')));
-    }
   },
 
   matches() {

src/js/parser/javascript/root.js

@@ -4,7 +4,7 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'root',
 
-  render() {
+  _render() {
     this.regexp.setContainer(this.container.group().transform(Snap.matrix()
       .translate(10, 0)));
     this.regexp.render();
@@ -17,7 +17,7 @@ export default _.extend({}, Base, {
       .attr({ r: 5 });
   },
 
-  position() {
+  _position() {
     var contentBox;
 
     this.regexp.position();

src/js/parser/javascript/subexp.js

@@ -12,7 +12,7 @@ export default _.extend({}, Base, {
     '?!': 'negative lookahead'
   },
 
-  render() {
+  _render() {
     var label = this.groupLabel();
 
     if (label) {
@@ -21,19 +21,16 @@ export default _.extend({}, Base, {
       this.regexp.setContainer(this.container.group());
       this.regexp.render();
     } else {
-      this.regexp.setContainer(this.container);
+      this.proxy(this.regexp);
-      this.regexp.render();
     }
   },
 
-  position() {
+  _position() {
     this.regexp.position();
 
-    if (this.groupLabel()) {
     this.positionLabeledBox(this.regexp.container, {
       padding: 10
     });
-    }
   },
 
   groupLabel() {