src/third_party/devtools/node_modules/handlebars/dist/cjs/handlebars/compiler/visitor.js

'use strict';

exports.__esModule = true;
// istanbul ignore next

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }

var _exception = require('../exception');

var _exception2 = _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 _exception2['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 _exception2['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 _exception2['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');
}

exports['default'] = Visitor;
module.exports = exports['default'];
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"sources":["../../../../lib/handlebars/compiler/visitor.js"],"names":[],"mappings":";;;;;;;yBAAsB,cAAc;;;;AAEpC,SAAS,OAAO,GAAG;AACjB,MAAI,CAAC,OAAO,GAAG,EAAE,CAAC;CACnB;;AAED,OAAO,CAAC,SAAS,GAAG;AAClB,aAAW,EAAE,OAAO;AACpB,UAAQ,EAAE,KAAK;;;AAGf,WAAS,EAAE,mBAAS,IAAI,EAAE,IAAI,EAAE;AAC9B,QAAI,KAAK,GAAG,IAAI,CAAC,MAAM,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC;AACpC,QAAI,IAAI,CAAC,QAAQ,EAAE;;;AAGjB,UAAI,KAAK,IAAI,CAAC,OAAO,CAAC,SAAS,CAAC,KAAK,CAAC,IAAI,CAAC,EAAE;AAC3C,cAAM,2BAAc,wBAAwB,GAAG,KAAK,CAAC,IAAI,GAAG,yBAAyB,GAAG,IAAI,GAAG,MAAM,GAAG,IAAI,CAAC,IAAI,CAAC,CAAC;OACpH;AACD,UAAI,CAAC,IAAI,CAAC,GAAG,KAAK,CAAC;KACpB;GACF;;;;AAID,gBAAc,EAAE,wBAAS,IAAI,EAAE,IAAI,EAAE;AACnC,QAAI,CAAC,SAAS,CAAC,IAAI,EAAE,IAAI,CAAC,CAAC;;AAE3B,QAAI,CAAC,IAAI,CAAC,IAAI,CAAC,EAAE;AACf,YAAM,2BAAc,IAAI,CAAC,IAAI,GAAG,YAAY,GAAG,IAAI,CAAC,CAAC;KACtD;GACF;;;;AAID,aAAW,EAAE,qBAAS,KAAK,EAAE;AAC3B,SAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,KAAK,CAAC,MAAM,EAAE,CAAC,GAAG,CAAC,EAAE,CAAC,EAAE,EAAE;AAC5C,UAAI,CAAC,SAAS,CAAC,KAAK,EAAE,CAAC,CAAC,CAAC;;AAEzB,UAAI,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE;AACb,aAAK,CAAC,MAAM,CAAC,CAAC,EAAE,CAAC,CAAC,CAAC;AACnB,SAAC,EAAE,CAAC;AACJ,SAAC,EAAE,CAAC;OACL;KACF;GACF;;AAED,QAAM,EAAE,gBAAS,MAAM,EAAE;AACvB,QAAI,CAAC,MAAM,EAAE;AACX,aAAO;KACR;;;AAGD,QAAI,CAAC,IAAI,CAAC,MAAM,CAAC,IAAI,CAAC,EAAE;AACtB,YAAM,2BAAc,gBAAgB,GAAG,MAAM,CAAC,IAAI,EAAE,MAAM,CAAC,CAAC;KAC7D;;AAED,QAAI,IAAI,CAAC,OAAO,EAAE;AAChB,UAAI,CAAC,OAAO,CAAC,OAAO,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;KACpC;AACD,QAAI,CAAC,OAAO,GAAG,MAAM,CAAC;;AAEtB,QAAI,GAAG,GAAG,IAAI,CAAC,MAAM,CAAC,IAAI,CAAC,CAAC,MAAM,CAAC,CAAC;;AAEpC,QAAI,CAAC,OAAO,GAAG,IAAI,CAAC,OAAO,CAAC,KAAK,EAAE,CAAC;;AAEpC,QAAI,CAAC,IAAI,CAAC,QAAQ,IAAI,GAAG,EAAE;AACzB,aAAO,GAAG,CAAC;KACZ,MAAM,IAAI,GAAG,KAAK,KAAK,EAAE;AACxB,aAAO,MAAM,CAAC;KACf;GACF;;AAED,SAAO,EAAE,iBAAS,OAAO,EAAE;AACzB,QAAI,CAAC,WAAW,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC;GAChC;;AAED,mBAAiB,EAAE,kBAAkB;AACrC,WAAS,EAAE,kBAAkB;;AAE7B,gBAAc,EAAE,UAAU;AAC1B,gBAAc,EAAE,UAAU;;AAE1B,kBAAgB,EAAE,YAAY;AAC9B,uBAAqB,EAAE,+BAAS,OAAO,EAAE;AACvC,gBAAY,CAAC,IAAI,CAAC,IAAI,EAAE,OAAO,CAAC,CAAC;;AAEjC,QAAI,CAAC,SAAS,CAAC,OAAO,EAAE,SAAS,CAAC,CAAC;GACpC;;AAED,kBAAgB,EAAE,yCAAwB,EAAE;AAC5C,kBAAgB,EAAE,yCAAwB,EAAE;;AAE5C,eAAa,EAAE,kBAAkB;;AAEjC,gBAAc,EAAE,oCAAqB,EAAE;;AAEvC,eAAa,EAAE,qCAAuB,EAAE;AACxC,eAAa,EAAE,qCAAuB,EAAE;AACxC,gBAAc,EAAE,oCAAqB,EAAE;AACvC,kBAAgB,EAAE,yCAAwB,EAAE;AAC5C,aAAW,EAAE,oCAAwB,EAAE;;AAEvC,MAAI,EAAE,cAAS,IAAI,EAAE;AACnB,QAAI,CAAC,WAAW,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC;GAC9B;AACD,UAAQ,EAAE,kBAAS,IAAI,EAAE;AACvB,QAAI,CAAC,cAAc,CAAC,IAAI,EAAE,OAAO,CAAC,CAAC;GACpC;CACF,CAAC;;AAEF,SAAS,kBAAkB,CAAC,QAAQ,EAAE;AACpC,MAAI,CAAC,cAAc,CAAC,QAAQ,EAAE,MAAM,CAAC,CAAC;AACtC,MAAI,CAAC,WAAW,CAAC,QAAQ,CAAC,MAAM,CAAC,CAAC;AAClC,MAAI,CAAC,SAAS,CAAC,QAAQ,EAAE,MAAM,CAAC,CAAC;CAClC;AACD,SAAS,UAAU,CAAC,KAAK,EAAE;AACzB,oBAAkB,CAAC,IAAI,CAAC,IAAI,EAAE,KAAK,CAAC,CAAC;;AAErC,MAAI,CAAC,SAAS,CAAC,KAAK,EAAE,SAAS,CAAC,CAAC;AACjC,MAAI,CAAC,SAAS,CAAC,KAAK,EAAE,SAAS,CAAC,CAAC;CAClC;AACD,SAAS,YAAY,CAAC,OAAO,EAAE;AAC7B,MAAI,CAAC,cAAc,CAAC,OAAO,EAAE,MAAM,CAAC,CAAC;AACrC,MAAI,CAAC,WAAW,CAAC,OAAO,CAAC,MAAM,CAAC,CAAC;AACjC,MAAI,CAAC,SAAS,CAAC,OAAO,EAAE,MAAM,CAAC,CAAC;CACjC;;qBAEc,OAAO","file":"visitor.js","sourcesContent":["import Exception from '../exception';\n\nfunction Visitor() {\n  this.parents = [];\n}\n\nVisitor.prototype = {\n  constructor: Visitor,\n  mutating: false,\n\n  // Visits a given value. 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"]}