Adding code to render charsets

src/index.html

@@ -60,6 +60,10 @@
           fill: #dae9e5;
         }
 
+        .charset .charset-box {
+          fill: #cbcbba;
+        }
+
         .placeholder text {
           fill: #fff;
           font-weight: bold;

src/js/parser/javascript.js

@@ -6,6 +6,9 @@ import Match from './javascript/match.js';
 import MatchFragment from './javascript/match_fragment.js';
 import Subexp from './javascript/subexp.js';
 import Charset from './javascript/charset.js';
+import CharsetLiteral from './javascript/charset_literal.js';
+import CharsetEscape from './javascript/charset_escape.js';
+import CharsetRange from './javascript/charset_range.js';
 import Literal from './javascript/literal.js';
 import Escape from './javascript/escape.js';
 import AnyCharacter from './javascript/any_character.js';
@@ -21,6 +24,9 @@ parser.Parser.Match = Match;
 parser.Parser.MatchFragment = MatchFragment;
 parser.Parser.Subexp = Subexp;
 parser.Parser.Charset = Charset;
+parser.Parser.CharsetLiteral = CharsetLiteral;
+parser.Parser.CharsetEscape = CharsetEscape;
+parser.Parser.CharsetRange = CharsetRange;
 parser.Parser.Literal = Literal;
 parser.Parser.Escape = Escape;
 parser.Parser.AnyCharacter = AnyCharacter;

src/js/parser/javascript/charset.js

@@ -2,5 +2,69 @@ import _ from 'lodash';
 import Base from './base.js';
 
 export default _.extend({}, Base, {
-  type: 'charset'
+  type: 'charset',
+
+  render() {
+    this.container.addClass('charset');
+
+    this.label = this.container.text()
+      .attr({
+        text: this.invert() ? 'None of:' : 'One of:'
+      })
+      .transform(Snap.matrix()
+        .translate(0, 0));
+
+    this.box = this.container.rect()
+      .addClass('charset-box')
+      .attr({
+        rx: 3,
+        ry: 3
+      });
+
+    this.partContainer = this.container.group();
+
+    _.each(this.parts.elements, ((part) => {
+      part.container = this.partContainer.group();
+      part.render();
+    }).bind(this));
+  },
+
+  position() {
+    var box, offset = 0;
+
+    _.each(this.parts.elements, ((part) => {
+      var box;
+
+      part.position();
+
+      part.container.transform(Snap.matrix()
+        .translate(0, offset));
+
+      box = part.container.getBBox();
+
+      offset += box.height + 5;
+    }).bind(this));
+
+    box = this.partContainer.getBBox();
+
+    _.each(this.parts.elements, ((part) => {
+      var partBox = part.container.getBBox();
+
+      part.container.transform(Snap.matrix()
+        .add(part.container.transform().localMatrix)
+        .translate(box.cx - partBox.cx, 0));
+    }).bind(this));
+
+    this.box.attr({
+      width: box.width + 10,
+      height: box.height + 10
+    });
+
+    this.partContainer.transform(Snap.matrix()
+      .translate(5, 5));
+  },
+
+  invert() {
+    return this._invert.textValue !== '';
+  }
 });

src/js/parser/javascript/charset_escape.js

@@ -0,0 +1,10 @@
+import _ from 'lodash';
+import Escape from './escape.js';
+
+export default _.extend({}, Escape, {
+  type: 'charset_escape',
+
+  codeMap: _.extend({}, Escape.codeMap, {
+    b: 'backspace'
+  })
+});

src/js/parser/javascript/charset_literal.js

@@ -0,0 +1,6 @@
+import _ from 'lodash';
+import Literal from './literal.js';
+
+export default _.extend({}, Literal, {
+  type: 'literal'
+});

src/js/parser/javascript/charset_range.js

@@ -0,0 +1,6 @@
+import _ from 'lodash';
+import Base from './base.js';
+
+export default _.extend({}, Base, {
+  type: 'charset_range'
+});

src/js/parser/javascript/grammar.peg

@@ -20,15 +20,16 @@ grammar JavascriptRegexp
   subexp_no_capture <- "?:"
   subexp_positive_lookahead <- "?="
   subexp_negative_lookahead <- "?!"
-  charset <- "[" "^"? ( charset_range / charset_terminal )* "]" <Charset>
-  charset_range <- charset_terminal "-" charset_terminal
-  charset_terminal <- charset_escape / charset_literal
+  charset <- "[" _invert:"^"? parts:( charset_range / charset_terminal )* "]" <Charset>
+  charset_range <- first:charset_terminal "-" last:charset_terminal <CharsetRange>
+  charset_terminal <- charset_escape <CharsetEscape>
+                    / charset_literal <CharsetLiteral>
   charset_escape <- "\\" esc:(
          code:[bdDfnrsStvwW] arg:""?
        / code:"0" arg:[0-7]+
        / code:"x" arg:( [0-9a-fA-F] [0-9a-fA-F] )
        / code:"u" arg:( [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] ) )
-  charset_literal <- [^\\\]] / ( "\\" . )
+  charset_literal <- ( ""? literal:[^\\\]] ) / ( "\\" literal:. )
   terminal <- any_character <AnyCharacter>
             / escape <Escape>
             / literal <Literal>

src/js/parser/javascript/match_fragment.js

@@ -44,6 +44,6 @@ export default _.extend({}, Base, {
         .translate(0, 0));
     }
 
-    this.render_bbox(this.container, this.container.getBBox());
+    //this.render_bbox(this.container, this.container.getBBox());
   }
 });