Code coverage report for 6to5/file.js

Statements: 99.19% (123 / 124)      Branches: 95.83% (46 / 48)      Functions: 100% (16 / 16)      Lines: 100% (119 / 119)      Ignored: none     

All files » 6to5/ » file.js
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 2431   1   1 1 1 1 1 1 1   1 345 344 344     1                       1 345   345                               345   345 345   345       345       345       345         345 1     345 5     345 345   344     1 66 5 61 17   44       1 342   342 1 1     342 1     341     1 343 343 1     1     343     1 107 1     106   106 106   66 66 66 2 2   64     64 64         64     1 16   16 16 16 16     1 343 343 343     1 343   343   343 342 325       1 342 342 342   341   341 11622       1 325 325   325           325 325   324 324 324   324   1     324 1     324     1 246   246   246 246 246   246     1 230     1 246 246   246 246 246 246    
module.exports = File;
 
var SHEBANG_REGEX = /^\#\!.*/;
 
var Transformer = require("./transformation/transformer");
var transform   = require("./transformation/transform");
var generate    = require("./generation/generator");
var Scope       = require("./traverse/scope");
var util        = require("./util");
var t           = require("./types");
var _           = require("lodash");
 
function File(opts) {
  this.opts = File.normaliseOptions(opts);
  this.uids = {};
  this.ast  = {};
}
 
File.declarations = [
  "inherits",
  "prototype-properties",
  "apply-constructor",
  "tagged-template-literal",
  "interop-require",
  "to-array",
  "object-without-properties",
  "has-own",
  "slice"
];
 
File.normaliseOptions = function (opts) {
  opts = _.cloneDeep(opts || {});
 
  _.defaults(opts, {
    experimental: false,
    playground:   false,
    whitespace:   true,
    blacklist:    [],
    whitelist:    [],
    sourceMap:    false,
    comments:     true,
    filename:     "unknown",
    modules:      "common",
    runtime:      false,
    code:         true,
    ast:          true
  });
 
  // normalise windows path separators to unix
  opts.filename = opts.filename.replace(/\\/g, "/");
 
  opts.blacklist = util.arrayify(opts.blacklist);
  opts.whitelist = util.arrayify(opts.whitelist);
 
  _.defaults(opts, {
    moduleRoot: opts.sourceRoot
  });
 
  _.defaults(opts, {
    sourceRoot: opts.moduleRoot
  });
 
  _.defaults(opts, {
    filenameRelative: opts.filename
  });
 
  _.defaults(opts, {
    sourceFileName: opts.filenameRelative,
    sourceMapName:  opts.filenameRelative
  });
 
  if (opts.runtime === true) {
    opts.runtime = "to5Runtime";
  }
 
  if (opts.playground) {
    opts.experimental = true;
  }
 
  transform._ensureTransformerNames("blacklist", opts.blacklist);
  transform._ensureTransformerNames("whitelist", opts.whitelist);
 
  return opts;
};
 
File.prototype.toArray = function (node) {
  if (t.isArrayExpression(node)) {
    return node;
  } else if (t.isIdentifier(node) && node.name === "arguments") {
    return t.callExpression(t.memberExpression(this.addDeclaration("slice"), t.identifier("call")), [node]);
  } else {
    return t.callExpression(this.addDeclaration("to-array"), [node]);
  }
};
 
File.prototype.getModuleFormatter = function (type) {
  var ModuleFormatter = _.isFunction(type) ? type : transform.moduleFormatters[type];
 
  if (!ModuleFormatter) {
    var loc = util.resolve(type);
    Iif (loc) ModuleFormatter = require(loc);
  }
 
  if (!ModuleFormatter) {
    throw new ReferenceError("Unknown module formatter type " + JSON.stringify(type));
  }
 
  return new ModuleFormatter(this);
};
 
File.prototype.parseShebang = function (code) {
  var shebangMatch = code.match(SHEBANG_REGEX);
  if (shebangMatch) {
    this.shebang = shebangMatch[0];
 
    // remove shebang
    code = code.replace(SHEBANG_REGEX, "");
  }
 
  return code;
};
 
File.prototype.addDeclaration = function (name) {
  if (!_.contains(File.declarations, name)) {
    throw new ReferenceError("unknown declaration " + name);
  }
 
  var program = this.ast.program;
 
  var declar = program._declarations && program._declarations[name];
  if (declar) return declar.id;
 
  var ref;
  var runtimeNamespace = this.opts.runtime;
  if (runtimeNamespace) {
    name = t.identifier(t.toIdentifier(name));
    return t.memberExpression(t.identifier(runtimeNamespace), name);
  } else {
    ref = util.template(name);
  }
 
  var uid = this.generateUidIdentifier(name);
  this.scope.push({
    key: name,
    id: uid,
    init: ref
  });
  return uid;
};
 
File.prototype.errorWithNode = function (node, msg, Error) {
  Error = Error || SyntaxError;
 
  var loc = node.loc.start;
  var err = new Error("Line " + loc.line + ": " + msg);
  err.loc = loc;
  return err;
};
 
File.prototype.addCode = function (code) {
  code = (code || "") + "";
  this.code = code;
  return this.parseShebang(code);
};
 
File.prototype.parse = function (code) {
  var self = this;
 
  code = this.addCode(code);
 
  return util.parse(this.opts, code, function (tree) {
    self.transform(tree);
    return self.generate();
  });
};
 
File.prototype.transform = function (ast) {
  this.ast = ast;
  this.scope = new Scope(ast.program);
  this.moduleFormatter = this.getModuleFormatter(this.opts.modules);
 
  var self = this;
 
  _.each(transform.transformers, function (transformer) {
    transformer.transform(self);
  });
};
 
File.prototype.generate = function () {
  var opts = this.opts;
  var ast  = this.ast;
 
  var result = {
    code: "",
    map: null,
    ast: null
  };
 
  if (opts.ast) result.ast = ast;
  if (!opts.code) return result;
 
  var _result = generate(ast, opts, this.code);
  result.code = _result.code;
  result.map  = _result.map;
 
  if (this.shebang) {
    // add back shebang
    result.code = this.shebang + "\n" + result.code;
  }
 
  if (opts.sourceMap === "inline") {
    result.code += "\n" + util.sourceMapToComment(result.map);
  }
 
  return result;
};
 
File.prototype.generateUid = function (name, scope) {
  name = t.toIdentifier(name);
 
  scope = scope || this.scope;
 
  var uid;
  do {
    uid = this._generateUid(name);
  } while (scope.has(uid));
  return uid;
};
 
File.prototype.generateUidIdentifier = function (name, scope) {
  return t.identifier(this.generateUid(name, scope));
};
 
File.prototype._generateUid = function (name) {
  var uids = this.uids;
  var i = uids[name] || 1;
 
  var id = name;
  if (i > 1) id += i;
  uids[name] = i + 1;
  return "_" + id;
};