Adding rendering code for escape, literal, and "."

src/index.html

@@ -40,14 +40,26 @@
           stroke: #000;
         }
 
-        .anchor text {
+        .anchor text, .any-character text {
           fill: #fff;
         }
 
-        .anchor rect {
+        .anchor rect, .any-character rect {
           fill: #6b6659;
         }
 
+        .escape text, .literal text {
+          fill: #000;
+        }
+
+        .escape rect {
+          fill: #bada55;
+        }
+
+        .literal rect {
+          fill: #dae9e5;
+        }
+
         .placeholder text {
           fill: #fff;
           font-weight: bold;

src/js/parser/javascript/any_character.js

@@ -2,5 +2,11 @@ import _ from 'lodash';
 import Base from './base.js';
 
 export default _.extend({}, Base, {
-  type: 'any_character'
+  type: 'any_character',
+
+  render() {
+    this.container.addClass('any-character');
+
+    this.label = this.render_label(this.container, 'any character');
+  }
 });

src/js/parser/javascript/escape.js

@@ -2,5 +2,63 @@ import _ from 'lodash';
 import Base from './base.js';
 
 export default _.extend({}, Base, {
-  type: 'escape'
+  type: 'escape',
+
+  codeMap: {
+    b: 'word boundary',
+    B: 'non-word boundary',
+    d: 'digit',
+    D: 'non-digit',
+    f: 'form feed',
+    n: 'line feed',
+    r: 'carriage return',
+    s: 'white space',
+    S: 'non-white space',
+    t: 'tab',
+    v: 'vertical tab',
+    w: 'word',
+    W: 'non-word',
+    1: 'Back reference (group = 1)',
+    2: 'Back reference (group = 2)',
+    3: 'Back reference (group = 3)',
+    4: 'Back reference (group = 4)',
+    5: 'Back reference (group = 5)',
+    6: 'Back reference (group = 6)',
+    7: 'Back reference (group = 7)',
+    8: 'Back reference (group = 8)',
+    9: 'Back reference (group = 9)',
+    0: (arg) => {
+      if (arg) {
+        return 'octal: ' + arg;
+      } else {
+        return 'null';
+      }
+    },
+    c: (arg) => {
+      return 'ctrl-' + arg;
+    },
+    x: (arg) => {
+      return '0x' + arg.toUpperCase();
+    },
+    u: (arg) => {
+      return 'U+' + 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
+    });
+  }
 });

src/js/parser/javascript/grammar.peg

@@ -23,65 +23,21 @@ grammar JavascriptRegexp
   charset <- "[" "^"? ( charset_range / charset_terminal )* "]" <Charset>
   charset_range <- charset_terminal "-" charset_terminal
   charset_terminal <- charset_escape / charset_literal
-  charset_escape <- ( backspace_esc
-                    / control_esc
-                    / digit_esc
-                    / non_digit_esc
-                    / form_feed_esc
-                    / line_feed_esc
-                    / carriage_return_esc
-                    / white_space_esc
-                    / non_white_space_esc
-                    / tab_esc
-                    / vertical_tab_esc
-                    / word_esc
-                    / non_word_esc
-                    / octal_esc
-                    / hex_esc
-                    / unicode_esc
-                    / null_esc )
+  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 <- [^\\\]] / ( "\\" . )
   terminal <- any_character <AnyCharacter>
             / escape <Escape>
             / literal <Literal>
   any_character <- "."
-  escape <- ( word_boundary_esc
-            / non_word_boundary_esc
-            / control_esc
-            / digit_esc
-            / non_digit_esc
-            / form_feed_esc
-            / line_feed_esc
-            / carriage_return_esc
-            / white_space_esc
-            / non_white_space_esc
-            / tab_esc
-            / vertical_tab_esc
-            / word_esc
-            / non_word_esc
-            / back_reference
-            / octal_esc
-            / hex_esc
-            / unicode_esc
-            / null_esc )
+  escape <- "\\" esc:(
+         code:[bBdDfnrsStvwW1-9] arg:""?
+       / code:"c" 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] )
+       / code:"0" arg:""? )
   literal <- ( ""? literal:[^|\\/.\[\(\)?+*$^] ) / ( "\\" literal:. )
-  back_reference <- "\\" [1-9]
-  word_boundary_esc <- "\\b"
-  non_word_boundary_esc <- "\\B"
-  backspace_esc <- "\\b"
-  control_esc <- "\\b" .
-  digit_esc <- "\\d"
-  non_digit_esc <- "\\D"
-  form_feed_esc <- "\\f"
-  line_feed_esc <- "\\n"
-  carriage_return_esc <- "\\r"
-  white_space_esc <- "\\s"
-  non_white_space_esc <- "\\S"
-  tab_esc <- "\\t"
-  vertical_tab_esc <- "\\v"
-  word_esc <- "\\w"
-  non_word_esc <- "\\W"
-  octal_esc <- "\\0" [0-7]+
-  hex_esc <- "\\x" [0-9a-fA-F] [0-9a-fA-F]
-  unicode_esc <- "\\u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F]
-  null_esc <- "\\0"

src/js/parser/javascript/literal.js

@@ -2,5 +2,16 @@ import _ from 'lodash';
 import Base from './base.js';
 
 export default _.extend({}, Base, {
-  type: 'literal'
+  type: 'literal',
+
+  render() {
+    this.container.addClass('literal');
+
+    this.label = this.render_label(this.container, '"' + this.literal.textValue + '"');
+
+    this.label.select('rect').attr({
+      rx: 3,
+      ry: 3
+    });
+  }
 });