Refactoring code for escape display

src/js/parser/javascript/charset_escape.js

@@ -4,7 +4,5 @@ import Escape from './escape.js';
 export default _.extend({}, Escape, {
   type: 'charset_escape',
 
-  codeMap: _.extend({}, Escape.codeMap, {
   b: 'backspace'
-  })
 });

src/js/parser/javascript/escape.js

@@ -4,7 +4,26 @@ import Base from './base.js';
 export default _.extend({}, Base, {
   type: 'escape',
 
-  codeMap: {
+  code() {
+    return this.esc.code.textValue;
+  },
+
+  arg() {
+    return this.esc.arg.textValue;
+  },
+
+  render() {
+    this.container.addClass('escape');
+
+    this.label = this.render_label(this.container, _.result(this, this.code()));
+
+    this.label.select('rect').attr({
+      rx: 3,
+      ry: 3
+    });
+  },
+
+  // Escape code mappings
   b: 'word boundary',
   B: 'non-word boundary',
   d: 'digit',
@@ -27,38 +46,22 @@ export default _.extend({}, Base, {
   7: 'Back reference (group = 7)',
   8: 'Back reference (group = 8)',
   9: 'Back reference (group = 9)',
-    0: (arg) => {
+  0() {
+    var arg = this.arg();
+
     if (arg) {
       return 'octal: ' + arg;
     } else {
       return 'null';
     }
   },
-    c: (arg) => {
+  c() {
-      return 'ctrl-' + arg;
+    return 'ctrl-' + this.arg();
   },
-    x: (arg) => {
+  x() {
-      return '0x' + arg.toUpperCase();
+    return '0x' + this.arg().toUpperCase();
   },
-    u: (arg) => {
+  u() {
-      return 'U+' + arg.toUpperCase();
+    return 'U+' + this.arg().toUpperCase();
-    }
-  },
-
-  render() {
-    var code = this.codeMap[this.esc.code.textValue];
-
-    if (_.isFunction(code)) {
-      code = code(this.esc.arg.textValue);
-    }
-
-    this.container.addClass('escape');
-
-    this.label = this.render_label(this.container, code);
-
-    this.label.select('rect').attr({
-      rx: 3,
-      ry: 3
-    });
   }
 });