| define(['exports', 'module', '../exception'], function (exports, module, _exception) { |
| 'use strict'; |
| |
| // istanbul ignore next |
| |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } |
| |
| var _Exception = _interopRequireDefault(_exception); |
| |
| function Visitor() { |
| this.parents = []; |
| } |
| |
| Visitor.prototype = { |
| constructor: Visitor, |
| mutating: false, |
| |
| // Visits a given value. If mutating, will replace the value if necessary. |
| acceptKey: function acceptKey(node, name) { |
| var value = this.accept(node[name]); |
| if (this.mutating) { |
| // Hacky sanity check: This may have a few false positives for type for the helper |
| // methods but will generally do the right thing without a lot of overhead. |
| if (value && !Visitor.prototype[value.type]) { |
| throw new _Exception['default']('Unexpected node type "' + value.type + '" found when accepting ' + name + ' on ' + node.type); |
| } |
| node[name] = value; |
| } |
| }, |
| |
| // Performs an accept operation with added sanity check to ensure |
| // required keys are not removed. |
| acceptRequired: function acceptRequired(node, name) { |
| this.acceptKey(node, name); |
| |
| if (!node[name]) { |
| throw new _Exception['default'](node.type + ' requires ' + name); |
| } |
| }, |
| |
| // Traverses a given array. If mutating, empty respnses will be removed |
| // for child elements. |
| acceptArray: function acceptArray(array) { |
| for (var i = 0, l = array.length; i < l; i++) { |
| this.acceptKey(array, i); |
| |
| if (!array[i]) { |
| array.splice(i, 1); |
| i--; |
| l--; |
| } |
| } |
| }, |
| |
| accept: function accept(object) { |
| if (!object) { |
| return; |
| } |
| |
| /* istanbul ignore next: Sanity code */ |
| if (!this[object.type]) { |
| throw new _Exception['default']('Unknown type: ' + object.type, object); |
| } |
| |
| if (this.current) { |
| this.parents.unshift(this.current); |
| } |
| this.current = object; |
| |
| var ret = this[object.type](object); |
| |
| this.current = this.parents.shift(); |
| |
| if (!this.mutating || ret) { |
| return ret; |
| } else if (ret !== false) { |
| return object; |
| } |
| }, |
| |
| Program: function Program(program) { |
| this.acceptArray(program.body); |
| }, |
| |
| MustacheStatement: visitSubExpression, |
| Decorator: visitSubExpression, |
| |
| BlockStatement: visitBlock, |
| DecoratorBlock: visitBlock, |
| |
| PartialStatement: visitPartial, |
| PartialBlockStatement: function PartialBlockStatement(partial) { |
| visitPartial.call(this, partial); |
| |
| this.acceptKey(partial, 'program'); |
| }, |
| |
| ContentStatement: function ContentStatement() /* content */{}, |
| CommentStatement: function CommentStatement() /* comment */{}, |
| |
| SubExpression: visitSubExpression, |
| |
| PathExpression: function PathExpression() /* path */{}, |
| |
| StringLiteral: function StringLiteral() /* string */{}, |
| NumberLiteral: function NumberLiteral() /* number */{}, |
| BooleanLiteral: function BooleanLiteral() /* bool */{}, |
| UndefinedLiteral: function UndefinedLiteral() /* literal */{}, |
| NullLiteral: function NullLiteral() /* literal */{}, |
| |
| Hash: function Hash(hash) { |
| this.acceptArray(hash.pairs); |
| }, |
| HashPair: function HashPair(pair) { |
| this.acceptRequired(pair, 'value'); |
| } |
| }; |
| |
| function visitSubExpression(mustache) { |
| this.acceptRequired(mustache, 'path'); |
| this.acceptArray(mustache.params); |
| this.acceptKey(mustache, 'hash'); |
| } |
| function visitBlock(block) { |
| visitSubExpression.call(this, block); |
| |
| this.acceptKey(block, 'program'); |
| this.acceptKey(block, 'inverse'); |
| } |
| function visitPartial(partial) { |
| this.acceptRequired(partial, 'name'); |
| this.acceptArray(partial.params); |
| this.acceptKey(partial, 'hash'); |
| } |
| |
| module.exports = Visitor; |
| }); |
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If mutating, will replace the value if necessary.\n  acceptKey: function(node, name) {\n    let value = this.accept(node[name]);\n    if (this.mutating) {\n      // Hacky sanity check: This may have a few false positives for type for the helper\n      // methods but will generally do the right thing without a lot of overhead.\n      if (value && !Visitor.prototype[value.type]) {\n        throw new Exception('Unexpected node type \"' + value.type + '\" found when accepting ' + name + ' on ' + node.type);\n      }\n      node[name] = value;\n    }\n  },\n\n  // Performs an accept operation with added sanity check to ensure\n  // required keys are not removed.\n  acceptRequired: function(node, name) {\n    this.acceptKey(node, name);\n\n    if (!node[name]) {\n      throw new Exception(node.type + ' requires ' + name);\n    }\n  },\n\n  // Traverses a given array. If mutating, empty respnses will be removed\n  // for child elements.\n  acceptArray: function(array) {\n    for (let i = 0, l = array.length; i < l; i++) {\n      this.acceptKey(array, i);\n\n      if (!array[i]) {\n        array.splice(i, 1);\n        i--;\n        l--;\n      }\n    }\n  },\n\n  accept: function(object) {\n    if (!object) {\n      return;\n    }\n\n    /* istanbul ignore next: Sanity code */\n    if (!this[object.type]) {\n      throw new Exception('Unknown type: ' + object.type, object);\n    }\n\n    if (this.current) {\n      this.parents.unshift(this.current);\n    }\n    this.current = object;\n\n    let ret = this[object.type](object);\n\n    this.current = this.parents.shift();\n\n    if (!this.mutating || ret) {\n      return ret;\n    } else if (ret !== false) {\n      return object;\n    }\n  },\n\n  Program: function(program) {\n    this.acceptArray(program.body);\n  },\n\n  MustacheStatement: visitSubExpression,\n  Decorator: visitSubExpression,\n\n  BlockStatement: visitBlock,\n  DecoratorBlock: visitBlock,\n\n  PartialStatement: visitPartial,\n  PartialBlockStatement: function(partial) {\n    visitPartial.call(this, partial);\n\n    this.acceptKey(partial, 'program');\n  },\n\n  ContentStatement: function(/* content */) {},\n  CommentStatement: function(/* comment */) {},\n\n  SubExpression: visitSubExpression,\n\n  PathExpression: function(/* path */) {},\n\n  StringLiteral: function(/* string */) {},\n  NumberLiteral: function(/* number */) {},\n  BooleanLiteral: function(/* bool */) {},\n  UndefinedLiteral: function(/* literal */) {},\n  NullLiteral: function(/* literal */) {},\n\n  Hash: function(hash) {\n    this.acceptArray(hash.pairs);\n  },\n  HashPair: function(pair) {\n    this.acceptRequired(pair, 'value');\n  }\n};\n\nfunction visitSubExpression(mustache) {\n  this.acceptRequired(mustache, 'path');\n  this.acceptArray(mustache.params);\n  this.acceptKey(mustache, 'hash');\n}\nfunction visitBlock(block) {\n  visitSubExpression.call(this, block);\n\n  this.acceptKey(block, 'program');\n  this.acceptKey(block, 'inverse');\n}\nfunction visitPartial(partial) {\n  this.acceptRequired(partial, 'name');\n  this.acceptArray(partial.params);\n  this.acceptKey(partial, 'hash');\n}\n\nexport default Visitor;\n"]} |