Commiting initial factory code

lib/handlebars.js

@@ -1,14 +1,32 @@
-var Handlebars = require("./handlebars/base");
-module.exports = Handlebars;
+var handlebars = require("./handlebars/base"),
 
 // Each of these augment the Handlebars object. No need to setup here.
 // (This is done to easily share code between commonjs and browse envs)
-require("./handlebars/utils");
+	utils = require("./handlebars/utils"),
+	compiler = require("./handlebars/compiler"),
+	runtime = require("./handlebars/runtime");
 
-require("./handlebars/compiler");
-require("./handlebars/runtime");
+var create = function() {
+	var hb = handlebars.create();
+
+	utils.attach(hb);
+	compiler.attach(hb);
+	runtime.attach(hb);
+
+	return hb;
+};
+
+var Handlebars = create();
+Handlebars.create = create;
+
+module.exports = Handlebars; // instantiate an instance
 
 // BEGIN(BROWSER)
 
 // END(BROWSER)
 
+// USAGE:
+// var handlebars = require('handlebars');
+
+// var singleton = handlebars.Handlebars,
+// 	local = handlebars.create();

lib/handlebars/base.js

@@ -1,119 +1,119 @@
-// BEGIN(BROWSER)
+module.exports.create = function() {
 
-/*jshint eqnull:true*/
-this.Handlebars = {};
+  // BEGIN(BROWSER)
 
-(function(Handlebars) {
+  var Handlebars = {};
 
-Handlebars.VERSION = "1.0.rc.1";
+  Handlebars.VERSION = "1.0.rc.1";
 
-Handlebars.helpers  = {};
-Handlebars.partials = {};
+  Handlebars.helpers  = {};
+  Handlebars.partials = {};
 
-Handlebars.registerHelper = function(name, fn, inverse) {
-  if(inverse) { fn.not = inverse; }
-  this.helpers[name] = fn;
-};
+  Handlebars.registerHelper = function(name, fn, inverse) {
+    if(inverse) { fn.not = inverse; }
+    this.helpers[name] = fn;
+  };
 
-Handlebars.registerPartial = function(name, str) {
-  this.partials[name] = str;
-};
+  Handlebars.registerPartial = function(name, str) {
+    this.partials[name] = str;
+  };
 
-Handlebars.registerHelper('helperMissing', function(arg) {
-  if(arguments.length === 2) {
-    return undefined;
-  } else {
-    throw new Error("Could not find property '" + arg + "'");
-  }
-});
+  Handlebars.registerHelper('helperMissing', function(arg) {
+    if(arguments.length === 2) {
+      return undefined;
+    } else {
+      throw new Error("Could not find property '" + arg + "'");
+    }
+  });
 
-var toString = Object.prototype.toString, functionType = "[object Function]";
+  var toString = Object.prototype.toString, functionType = "[object Function]";
 
-Handlebars.registerHelper('blockHelperMissing', function(context, options) {
-  var inverse = options.inverse || function() {}, fn = options.fn;
+  Handlebars.registerHelper('blockHelperMissing', function(context, options) {
+    var inverse = options.inverse || function() {}, fn = options.fn;
 
 
-  var ret = "";
-  var type = toString.call(context);
+    var ret = "";
+    var type = toString.call(context);
 
-  if(type === functionType) { context = context.call(this); }
+    if(type === functionType) { context = context.call(this); }
 
-  if(context === true) {
-    return fn(this);
-  } else if(context === false || context == null) {
-    return inverse(this);
-  } else if(type === "[object Array]") {
-    if(context.length > 0) {
+    if(context === true) {
+      return fn(this);
+    } else if(context === false || context == null) {
+      return inverse(this);
+    } else if(type === "[object Array]") {
+      if(context.length > 0) {
+        for(var i=0, j=context.length; i<j; i++) {
+          ret = ret + fn(context[i]);
+        }
+      } else {
+        ret = inverse(this);
+      }
+      return ret;
+    } else {
+      return fn(context);
+    }
+  });
+
+  Handlebars.K = function() {};
+
+  Handlebars.createFrame = Object.create || function(object) {
+    Handlebars.K.prototype = object;
+    var obj = new Handlebars.K();
+    Handlebars.K.prototype = null;
+    return obj;
+  };
+
+  Handlebars.registerHelper('each', function(context, options) {
+    var fn = options.fn, inverse = options.inverse;
+    var ret = "", data;
+
+    if (options.data) {
+      data = Handlebars.createFrame(options.data);
+    }
+
+    if(context && context.length > 0) {
       for(var i=0, j=context.length; i<j; i++) {
-        ret = ret + fn(context[i]);
+        if (data) { data.index = i; }
+        ret = ret + fn(context[i], { data: data });
       }
     } else {
       ret = inverse(this);
     }
     return ret;
-  } else {
-    return fn(context);
-  }
-});
+  });
 
-Handlebars.K = function() {};
+  Handlebars.registerHelper('if', function(context, options) {
+    var type = toString.call(context);
+    if(type === functionType) { context = context.call(this); }
+
+    if(!context || Handlebars.Utils.isEmpty(context)) {
+      return options.inverse(this);
+    } else {
+      return options.fn(this);
+    }
+  });
+
+  Handlebars.registerHelper('unless', function(context, options) {
+    var fn = options.fn, inverse = options.inverse;
+    options.fn = inverse;
+    options.inverse = fn;
+
+    return Handlebars.helpers['if'].call(this, context, options);
+  });
+
+  Handlebars.registerHelper('with', function(context, options) {
+    return options.fn(context);
+  });
+
+  Handlebars.registerHelper('log', function(context) {
+    Handlebars.log(context);
+  });
+
+  // END(BROWSER)
+  
+  return Handlebars;
 
-Handlebars.createFrame = Object.create || function(object) {
-  Handlebars.K.prototype = object;
-  var obj = new Handlebars.K();
-  Handlebars.K.prototype = null;
-  return obj;
 };
 
-Handlebars.registerHelper('each', function(context, options) {
-  var fn = options.fn, inverse = options.inverse;
-  var ret = "", data;
-
-  if (options.data) {
-    data = Handlebars.createFrame(options.data);
-  }
-
-  if(context && context.length > 0) {
-    for(var i=0, j=context.length; i<j; i++) {
-      if (data) { data.index = i; }
-      ret = ret + fn(context[i], { data: data });
-    }
-  } else {
-    ret = inverse(this);
-  }
-  return ret;
-});
-
-Handlebars.registerHelper('if', function(context, options) {
-  var type = toString.call(context);
-  if(type === functionType) { context = context.call(this); }
-
-  if(!context || Handlebars.Utils.isEmpty(context)) {
-    return options.inverse(this);
-  } else {
-    return options.fn(this);
-  }
-});
-
-Handlebars.registerHelper('unless', function(context, options) {
-  var fn = options.fn, inverse = options.inverse;
-  options.fn = inverse;
-  options.inverse = fn;
-
-  return Handlebars.helpers['if'].call(this, context, options);
-});
-
-Handlebars.registerHelper('with', function(context, options) {
-  return options.fn(context);
-});
-
-Handlebars.registerHelper('log', function(context) {
-  Handlebars.log(context);
-});
-
-}(this.Handlebars));
-
-// END(BROWSER)
-
-module.exports = this.Handlebars;
 

lib/handlebars/compiler/ast.js

@@ -1,7 +1,6 @@
-var Handlebars = require('./base');
 
 // BEGIN(BROWSER)
-(function() {
+exports.attach = function(Handlebars) {
 
   Handlebars.AST = {};
 
@@ -118,6 +117,8 @@ var Handlebars = require('./base');
     this.comment = comment;
   };
 
-})();
+  return Handlebars;
+};
+
 // END(BROWSER)
 

lib/handlebars/compiler/base.js

@@ -1,27 +1,30 @@
 var handlebars = require("./parser").parser;
-var Handlebars = require("../base");
 
-// BEGIN(BROWSER)
-Handlebars.Parser = handlebars;
+exports.attach = function(Handlebars) {
 
-Handlebars.parse = function(string) {
-  Handlebars.Parser.yy = Handlebars.AST;
-  return Handlebars.Parser.parse(string);
+	// BEGIN(BROWSER)
+	
+	Handlebars.Parser = handlebars;
+
+	Handlebars.parse = function(string) {
+	  Handlebars.Parser.yy = Handlebars.AST;
+	  return Handlebars.Parser.parse(string);
+	};
+
+	Handlebars.print = function(ast) {
+	  return new Handlebars.PrintVisitor().accept(ast);
+	};
+
+	Handlebars.logger = {
+	  DEBUG: 0, INFO: 1, WARN: 2, ERROR: 3, level: 3,
+
+	  // override in the host environment
+	  log: function(level, str) {}
+	};
+
+	Handlebars.log = function(level, str) { Handlebars.logger.log(level, str); };
+
+	return Handlebars;
+
+	// END(BROWSER)
 };
-
-Handlebars.print = function(ast) {
-  return new Handlebars.PrintVisitor().accept(ast);
-};
-
-Handlebars.logger = {
-  DEBUG: 0, INFO: 1, WARN: 2, ERROR: 3, level: 3,
-
-  // override in the host environment
-  log: function(level, str) {}
-};
-
-Handlebars.log = function(level, str) { Handlebars.logger.log(level, str); };
-
-// END(BROWSER)
-
-module.exports = Handlebars;

lib/handlebars/compiler/index.js

@@ -1,7 +1,16 @@
 // Each of these module will augment the Handlebars object as it loads. No need to perform addition operations
-module.exports = require("./base");
-require("./visitor");
-require("./printer");
+module.exports.attach = function(Handlebars) {
 
-require("./ast");
-require("./compiler");
+var visitor = require("./visitor"),
+	printer = require("./printer"),
+	ast = require("./ast"),
+	compiler = require("./compiler");
+
+visitor.attach(Handlebars);
+printer.attach(Handlebars);
+ast.attach(Handlebars);
+compiler.attach(Handlebars);
+
+return Handlebars;
+
+};

lib/handlebars/compiler/printer.js

@@ -1,127 +1,130 @@
-var Handlebars = require("./base");
+exports.attach = function(Handlebars) {
 
-// BEGIN(BROWSER)
-Handlebars.PrintVisitor = function() { this.padding = 0; };
-Handlebars.PrintVisitor.prototype = new Handlebars.Visitor();
+  // BEGIN(BROWSER)
+  
+  Handlebars.PrintVisitor = function() { this.padding = 0; };
+  Handlebars.PrintVisitor.prototype = new Handlebars.Visitor();
 
-Handlebars.PrintVisitor.prototype.pad = function(string, newline) {
-  var out = "";
+  Handlebars.PrintVisitor.prototype.pad = function(string, newline) {
+    var out = "";
 
-  for(var i=0,l=this.padding; i<l; i++) {
-    out = out + "  ";
-  }
+    for(var i=0,l=this.padding; i<l; i++) {
+      out = out + "  ";
+    }
 
-  out = out + string;
+    out = out + string;
 
-  if(newline !== false) { out = out + "\n"; }
-  return out;
-};
+    if(newline !== false) { out = out + "\n"; }
+    return out;
+  };
 
-Handlebars.PrintVisitor.prototype.program = function(program) {
-  var out = "",
-      statements = program.statements,
-      inverse = program.inverse,
-      i, l;
+  Handlebars.PrintVisitor.prototype.program = function(program) {
+    var out = "",
+        statements = program.statements,
+        inverse = program.inverse,
+        i, l;
 
-  for(i=0, l=statements.length; i<l; i++) {
-    out = out + this.accept(statements[i]);
-  }
+    for(i=0, l=statements.length; i<l; i++) {
+      out = out + this.accept(statements[i]);
+    }
 
-  this.padding--;
-
-  return out;
-};
-
-Handlebars.PrintVisitor.prototype.block = function(block) {
-  var out = "";
-
-  out = out + this.pad("BLOCK:");
-  this.padding++;
-  out = out + this.accept(block.mustache);
-  if (block.program) {
-    out = out + this.pad("PROGRAM:");
-    this.padding++;
-    out = out + this.accept(block.program);
     this.padding--;
-  }
-  if (block.inverse) {
-    if (block.program) { this.padding++; }
-    out = out + this.pad("{{^}}");
+
+    return out;
+  };
+
+  Handlebars.PrintVisitor.prototype.block = function(block) {
+    var out = "";
+
+    out = out + this.pad("BLOCK:");
     this.padding++;
-    out = out + this.accept(block.inverse);
+    out = out + this.accept(block.mustache);
+    if (block.program) {
+      out = out + this.pad("PROGRAM:");
+      this.padding++;
+      out = out + this.accept(block.program);
+      this.padding--;
+    }
+    if (block.inverse) {
+      if (block.program) { this.padding++; }
+      out = out + this.pad("{{^}}");
+      this.padding++;
+      out = out + this.accept(block.inverse);
+      this.padding--;
+      if (block.program) { this.padding--; }
+    }
     this.padding--;
-    if (block.program) { this.padding--; }
-  }
-  this.padding--;
 
-  return out;
+    return out;
+  };
+
+  Handlebars.PrintVisitor.prototype.mustache = function(mustache) {
+    var params = mustache.params, paramStrings = [], hash;
+
+    for(var i=0, l=params.length; i<l; i++) {
+      paramStrings.push(this.accept(params[i]));
+    }
+
+    params = "[" + paramStrings.join(", ") + "]";
+
+    hash = mustache.hash ? " " + this.accept(mustache.hash) : "";
+
+    return this.pad("{{ " + this.accept(mustache.id) + " " + params + hash + " }}");
+  };
+
+  Handlebars.PrintVisitor.prototype.partial = function(partial) {
+    var content = this.accept(partial.id);
+    if(partial.context) { content = content + " " + this.accept(partial.context); }
+    return this.pad("{{> " + content + " }}");
+  };
+
+  Handlebars.PrintVisitor.prototype.hash = function(hash) {
+    var pairs = hash.pairs;
+    var joinedPairs = [], left, right;
+
+    for(var i=0, l=pairs.length; i<l; i++) {
+      left = pairs[i][0];
+      right = this.accept(pairs[i][1]);
+      joinedPairs.push( left + "=" + right );
+    }
+
+    return "HASH{" + joinedPairs.join(", ") + "}";
+  };
+
+  Handlebars.PrintVisitor.prototype.STRING = function(string) {
+    return '"' + string.string + '"';
+  };
+
+  Handlebars.PrintVisitor.prototype.INTEGER = function(integer) {
+    return "INTEGER{" + integer.integer + "}";
+  };
+
+  Handlebars.PrintVisitor.prototype.BOOLEAN = function(bool) {
+    return "BOOLEAN{" + bool.bool + "}";
+  };
+
+  Handlebars.PrintVisitor.prototype.ID = function(id) {
+    var path = id.parts.join("/");
+    if(id.parts.length > 1) {
+      return "PATH:" + path;
+    } else {
+      return "ID:" + path;
+    }
+  };
+
+  Handlebars.PrintVisitor.prototype.DATA = function(data) {
+    return "@" + data.id;
+  };
+
+  Handlebars.PrintVisitor.prototype.content = function(content) {
+    return this.pad("CONTENT[ '" + content.string + "' ]");
+  };
+
+  Handlebars.PrintVisitor.prototype.comment = function(comment) {
+    return this.pad("{{! '" + comment.comment + "' }}");
+  };
+  // END(BROWSER)
+
+  return Handlebars;
 };
 
-Handlebars.PrintVisitor.prototype.mustache = function(mustache) {
-  var params = mustache.params, paramStrings = [], hash;
-
-  for(var i=0, l=params.length; i<l; i++) {
-    paramStrings.push(this.accept(params[i]));
-  }
-
-  params = "[" + paramStrings.join(", ") + "]";
-
-  hash = mustache.hash ? " " + this.accept(mustache.hash) : "";
-
-  return this.pad("{{ " + this.accept(mustache.id) + " " + params + hash + " }}");
-};
-
-Handlebars.PrintVisitor.prototype.partial = function(partial) {
-  var content = this.accept(partial.id);
-  if(partial.context) { content = content + " " + this.accept(partial.context); }
-  return this.pad("{{> " + content + " }}");
-};
-
-Handlebars.PrintVisitor.prototype.hash = function(hash) {
-  var pairs = hash.pairs;
-  var joinedPairs = [], left, right;
-
-  for(var i=0, l=pairs.length; i<l; i++) {
-    left = pairs[i][0];
-    right = this.accept(pairs[i][1]);
-    joinedPairs.push( left + "=" + right );
-  }
-
-  return "HASH{" + joinedPairs.join(", ") + "}";
-};
-
-Handlebars.PrintVisitor.prototype.STRING = function(string) {
-  return '"' + string.string + '"';
-};
-
-Handlebars.PrintVisitor.prototype.INTEGER = function(integer) {
-  return "INTEGER{" + integer.integer + "}";
-};
-
-Handlebars.PrintVisitor.prototype.BOOLEAN = function(bool) {
-  return "BOOLEAN{" + bool.bool + "}";
-};
-
-Handlebars.PrintVisitor.prototype.ID = function(id) {
-  var path = id.parts.join("/");
-  if(id.parts.length > 1) {
-    return "PATH:" + path;
-  } else {
-    return "ID:" + path;
-  }
-};
-
-Handlebars.PrintVisitor.prototype.DATA = function(data) {
-  return "@" + data.id;
-};
-
-Handlebars.PrintVisitor.prototype.content = function(content) {
-  return this.pad("CONTENT[ '" + content.string + "' ]");
-};
-
-Handlebars.PrintVisitor.prototype.comment = function(comment) {
-  return this.pad("{{! '" + comment.comment + "' }}");
-};
-// END(BROWSER)
-
-exports.PrintVisitor = Handlebars.PrintVisitor;

lib/handlebars/compiler/visitor.js

@@ -1,13 +1,20 @@
-var Handlebars = require("./base");
 
-// BEGIN(BROWSER)
+exports.attach = function(Handlebars) {
 
-Handlebars.Visitor = function() {};
+	// BEGIN(BROWSER)
+
+	Handlebars.Visitor = function() {};
+
+	Handlebars.Visitor.prototype = {
+	  accept: function(object) {
+	    return this[object.type](object);
+	  }
+	};
+
+	// END(BROWSER)
+
+	return Handlebars;
 
-Handlebars.Visitor.prototype = {
-  accept: function(object) {
-    return this[object.type](object);
-  }
 };
-// END(BROWSER)
+
 

lib/handlebars/runtime.js

@@ -1,68 +1,72 @@
-var Handlebars = require("./base");
+exports.attach = function(Handlebars) {
 
-// BEGIN(BROWSER)
-Handlebars.VM = {
-  template: function(templateSpec) {
-    // Just add water
-    var container = {
-      escapeExpression: Handlebars.Utils.escapeExpression,
-      invokePartial: Handlebars.VM.invokePartial,
-      programs: [],
-      program: function(i, fn, data) {
-        var programWrapper = this.programs[i];
-        if(data) {
-          return Handlebars.VM.program(fn, data);
-        } else if(programWrapper) {
-          return programWrapper;
-        } else {
-          programWrapper = this.programs[i] = Handlebars.VM.program(fn);
-          return programWrapper;
-        }
-      },
-      programWithDepth: Handlebars.VM.programWithDepth,
-      noop: Handlebars.VM.noop
-    };
+  // BEGIN(BROWSER)
+  
+  Handlebars.VM = {
+    template: function(templateSpec) {
+      // Just add water
+      var container = {
+        escapeExpression: Handlebars.Utils.escapeExpression,
+        invokePartial: Handlebars.VM.invokePartial,
+        programs: [],
+        program: function(i, fn, data) {
+          var programWrapper = this.programs[i];
+          if(data) {
+            return Handlebars.VM.program(fn, data);
+          } else if(programWrapper) {
+            return programWrapper;
+          } else {
+            programWrapper = this.programs[i] = Handlebars.VM.program(fn);
+            return programWrapper;
+          }
+        },
+        programWithDepth: Handlebars.VM.programWithDepth,
+        noop: Handlebars.VM.noop
+      };
 
-    return function(context, options) {
-      options = options || {};
-      return templateSpec.call(container, Handlebars, context, options.helpers, options.partials, options.data);
-    };
-  },
+      return function(context, options) {
+        options = options || {};
+        return templateSpec.call(container, Handlebars, context, options.helpers, options.partials, options.data);
+      };
+    },
 
-  programWithDepth: function(fn, data, $depth) {
-    var args = Array.prototype.slice.call(arguments, 2);
+    programWithDepth: function(fn, data, $depth) {
+      var args = Array.prototype.slice.call(arguments, 2);
 
-    return function(context, options) {
-      options = options || {};
+      return function(context, options) {
+        options = options || {};
 
-      return fn.apply(this, [context, options.data || data].concat(args));
-    };
-  },
-  program: function(fn, data) {
-    return function(context, options) {
-      options = options || {};
+        return fn.apply(this, [context, options.data || data].concat(args));
+      };
+    },
+    program: function(fn, data) {
+      return function(context, options) {
+        options = options || {};
 
-      return fn(context, options.data || data);
-    };
-  },
-  noop: function() { return ""; },
-  invokePartial: function(partial, name, context, helpers, partials, data) {
-    var options = { helpers: helpers, partials: partials, data: data };
+        return fn(context, options.data || data);
+      };
+    },
+    noop: function() { return ""; },
+    invokePartial: function(partial, name, context, helpers, partials, data) {
+      var options = { helpers: helpers, partials: partials, data: data };
 
-    if(partial === undefined) {
-      throw new Handlebars.Exception("The partial " + name + " could not be found");
-    } else if(partial instanceof Function) {
-      return partial(context, options);
-    } else if (!Handlebars.compile) {
-      throw new Handlebars.Exception("The partial " + name + " could not be compiled when running in runtime-only mode");
-    } else {
-      partials[name] = Handlebars.compile(partial);
-      return partials[name](context, options);
+      if(partial === undefined) {
+        throw new Handlebars.Exception("The partial " + name + " could not be found");
+      } else if(partial instanceof Function) {
+        return partial(context, options);
+      } else if (!Handlebars.compile) {
+        throw new Handlebars.Exception("The partial " + name + " could not be compiled when running in runtime-only mode");
+      } else {
+        partials[name] = Handlebars.compile(partial);
+        return partials[name](context, options);
+      }
     }
-  }
-};
+  };
 
-Handlebars.template = Handlebars.VM.template;
+  Handlebars.template = Handlebars.VM.template;
 
-// END(BROWSER)
+  // END(BROWSER)
 
+  return Handlebars;
+
+};

lib/handlebars/utils.js

@@ -1,68 +1,72 @@
-var Handlebars = require("./base");
+exports.attach = function(Handlebars) {
 
-// BEGIN(BROWSER)
-Handlebars.Exception = function(message) {
-  var tmp = Error.prototype.constructor.apply(this, arguments);
+  // BEGIN(BROWSER)
 
-  for (var p in tmp) {
-    if (tmp.hasOwnProperty(p)) { this[p] = tmp[p]; }
-  }
+  Handlebars.Exception = function(message) {
+    var tmp = Error.prototype.constructor.apply(this, arguments);
 
-  this.message = tmp.message;
-};
-Handlebars.Exception.prototype = new Error();
-
-// Build out our basic SafeString type
-Handlebars.SafeString = function(string) {
-  this.string = string;
-};
-Handlebars.SafeString.prototype.toString = function() {
-  return this.string.toString();
-};
-
-(function() {
-  var escape = {
-    "<": "&lt;",
-    ">": "&gt;",
-    '"': "&quot;",
-    "'": "&#x27;",
-    "`": "&#x60;"
-  };
-
-  var badChars = /&(?!\w+;)|[<>"'`]/g;
-  var possible = /[&<>"'`]/;
-
-  var escapeChar = function(chr) {
-    return escape[chr] || "&amp;";
-  };
-
-  Handlebars.Utils = {
-    escapeExpression: function(string) {
-      // don't escape SafeStrings, since they're already safe
-      if (string instanceof Handlebars.SafeString) {
-        return string.toString();
-      } else if (string == null || string === false) {
-        return "";
-      }
-
-      if(!possible.test(string)) { return string; }
-      return string.replace(badChars, escapeChar);
-    },
-
-    isEmpty: function(value) {
-      if (typeof value === "undefined") {
-        return true;
-      } else if (value === null) {
-        return true;
-      } else if (value === false) {
-        return true;
-      } else if(Object.prototype.toString.call(value) === "[object Array]" && value.length === 0) {
-        return true;
-      } else {
-        return false;
-      }
+    for (var p in tmp) {
+      if (tmp.hasOwnProperty(p)) { this[p] = tmp[p]; }
     }
-  };
-})();
-// END(BROWSER)
 
+    this.message = tmp.message;
+  };
+  Handlebars.Exception.prototype = new Error();
+
+  // Build out our basic SafeString type
+  Handlebars.SafeString = function(string) {
+    this.string = string;
+  };
+  Handlebars.SafeString.prototype.toString = function() {
+    return this.string.toString();
+  };
+
+  (function() {
+    var escape = {
+      "<": "&lt;",
+      ">": "&gt;",
+      '"': "&quot;",
+      "'": "&#x27;",
+      "`": "&#x60;"
+    };
+
+    var badChars = /&(?!\w+;)|[<>"'`]/g;
+    var possible = /[&<>"'`]/;
+
+    var escapeChar = function(chr) {
+      return escape[chr] || "&amp;";
+    };
+
+    Handlebars.Utils = {
+      escapeExpression: function(string) {
+        // don't escape SafeStrings, since they're already safe
+        if (string instanceof Handlebars.SafeString) {
+          return string.toString();
+        } else if (string == null || string === false) {
+          return "";
+        }
+
+        if(!possible.test(string)) { return string; }
+        return string.replace(badChars, escapeChar);
+      },
+
+      isEmpty: function(value) {
+        if (typeof value === "undefined") {
+          return true;
+        } else if (value === null) {
+          return true;
+        } else if (value === false) {
+          return true;
+        } else if(Object.prototype.toString.call(value) === "[object Array]" && value.length === 0) {
+          return true;
+        } else {
+          return false;
+        }
+      }
+    };
+  })();
+
+  // END(BROWSER)
+
+  return Handlebars;
+};