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| module.exports = File;
var SHEBANG_REGEX = /^\#\!.*/;
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 = [
"extends",
"class-props",
"apply-constructor",
"tagged-template-literal",
"interop-require",
"to-array",
"object-spread",
"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
});
// 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];
Iif (!ModuleFormatter) {
var loc = util.resolve(type);
if (loc) ModuleFormatter = require(loc);
}
Iif (!ModuleFormatter) {
throw new ReferenceError("unknown module formatter type " + 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.parse = function (code) {
code = (code || "") + "";
var self = this;
this.code = code;
code = this.parseShebang(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;
if (!opts.code) {
return {
code: "",
map: null,
ast: ast
};
}
var result = generate(ast, opts, this.code);
if (this.shebang) {
// add back shebang
result.code = this.shebang + "\n" + result.code;
}
if (opts.sourceMap === "inline") {
result.code += "\n" + util.sourceMapToComment(result.map);
}
result.ast = result;
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;
};
|