Initial commit. Note that I'm using CommonJS modules and node purely to help me develop this. If this ends up being useful, I will likely distribute the entire package as a single JS file for easier consumption in the browser.

2010-11-25 00:48:55 -08:00
commit 85fa2cb65f
8 changed files with 383 additions and 0 deletions
@@ -0,0 +1,71 @@
+if(require) {
+  var Lexer = require("handlebars/jison_ext").Lexer
+}
+
+var HandlebarsLexer = function() {
+  this.state = "CONTENT";
+};
+HandlebarsLexer.prototype = new Lexer;
+
+HandlebarsLexer.prototype.lex = function() {
+  if(this.input === "") return;
+
+  this.setupLex();
+
+  var lookahead = this.peek(2);
+  var result = '';
+
+  if(this.state == "MUSTACHE") {
+    // chomp optional whitespace
+    while(this.peek() === " ") { this.readchar(); }
+
+    if(this.peek(2) === "}}") {
+      this.state = "CONTENT"
+      this.getchar(2);
+
+      if(this.peek() == "}") this.getchar();
+      return "CLOSE";
+    } else if(this.peek() === '"') {
+      this.getchar();
+      while(this.peek() !== '"') { this.getchar() }
+      this.getchar();
+      return "STRING";
+    } else {
+      while(this.peek().match(/[A-Za-z]/)) { this.getchar() }
+      return "ID"
+    }
+  } else if(lookahead == "{{") {
+    this.state = "MUSTACHE";
+    this.getchar(2);
+
+    var peek = this.peek();
+
+    if(peek === ">") {
+      this.getchar();
+      return "OPEN_PARTIAL";
+    } else if(peek === "#") {
+      this.getchar();
+      return "OPEN_BLOCK";
+    } else if(peek === "/") {
+      this.getchar();
+      return "OPEN_ENDBLOCK";
+    } else if(peek === "^") {
+      this.getchar();
+      return "OPEN_INVERSE"
+    } else if(peek === "!") {
+      this.getchar();
+      this.setupLex();
+      while(this.peek(2) !== "}}") { this.getchar(); };
+      this.readchar(2);
+      this.state = "CONTENT"
+      return "COMMENT";
+    } else {
+      return "OPEN";
+    }
+  } else {
+    while(this.peek(2) !== "{{" && this.peek(2) !== "") { result = result + this.getchar(); }
+    return "CONTENT"
+  }
+};
+
+if(exports) { exports.Lexer = HandlebarsLexer; }