555 lines
15 KiB
JavaScript
555 lines
15 KiB
JavaScript
/* */
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"format cjs";
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"use strict";
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var _toolsProtectJs2 = require("./../tools/protect.js");
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var _toolsProtectJs3 = _interopRequireDefault(_toolsProtectJs2);
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var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj["default"] = obj; return newObj; } }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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var _detectIndent = require("detect-indent");
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var _detectIndent2 = _interopRequireDefault(_detectIndent);
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var _whitespace = require("./whitespace");
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var _whitespace2 = _interopRequireDefault(_whitespace);
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var _nodePrinter = require("./node/printer");
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var _nodePrinter2 = _interopRequireDefault(_nodePrinter);
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var _repeating = require("repeating");
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var _repeating2 = _interopRequireDefault(_repeating);
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var _sourceMap = require("./source-map");
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var _sourceMap2 = _interopRequireDefault(_sourceMap);
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var _position = require("./position");
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var _position2 = _interopRequireDefault(_position);
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var _messages = require("../messages");
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var messages = _interopRequireWildcard(_messages);
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var _buffer = require("./buffer");
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var _buffer2 = _interopRequireDefault(_buffer);
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var _lodashObjectExtend = require("lodash/object/extend");
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var _lodashObjectExtend2 = _interopRequireDefault(_lodashObjectExtend);
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var _lodashCollectionEach = require("lodash/collection/each");
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var _lodashCollectionEach2 = _interopRequireDefault(_lodashCollectionEach);
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var _node2 = require("./node");
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var _node3 = _interopRequireDefault(_node2);
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var _types = require("../types");
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var t = _interopRequireWildcard(_types);
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_toolsProtectJs3["default"](module);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
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/**
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* Babel's code generator, turns an ast into code, maintaining sourcemaps,
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* user preferences, and valid output.
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*/
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var CodeGenerator = (function () {
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function CodeGenerator(ast, opts, code) {
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_classCallCheck(this, CodeGenerator);
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opts = opts || {};
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this.comments = ast.comments || [];
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this.tokens = ast.tokens || [];
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this.format = CodeGenerator.normalizeOptions(code, opts, this.tokens);
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this.opts = opts;
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this.ast = ast;
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this.whitespace = new _whitespace2["default"](this.tokens);
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this.position = new _position2["default"]();
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this.map = new _sourceMap2["default"](this.position, opts, code);
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this.buffer = new _buffer2["default"](this.position, this.format);
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}
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/**
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* Normalize generator options, setting defaults.
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*
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* - Detects code indentation.
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* - If `opts.compact = "auto"` and the code is over 100KB, `compact` will be set to `true`.
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*/
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CodeGenerator.normalizeOptions = function normalizeOptions(code, opts, tokens) {
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var style = " ";
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if (code) {
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var indent = _detectIndent2["default"](code).indent;
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if (indent && indent !== " ") style = indent;
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}
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var format = {
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retainLines: opts.retainLines,
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comments: opts.comments == null || opts.comments,
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compact: opts.compact,
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quotes: CodeGenerator.findCommonStringDelimiter(code, tokens),
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indent: {
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adjustMultilineComment: true,
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style: style,
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base: 0
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}
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};
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if (format.compact === "auto") {
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format.compact = code.length > 100000; // 100KB
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if (format.compact) {
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console.error("[BABEL] " + messages.get("codeGeneratorDeopt", opts.filename, "100KB"));
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}
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}
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return format;
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};
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/**
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* Determine if input code uses more single or double quotes.
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*/
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CodeGenerator.findCommonStringDelimiter = function findCommonStringDelimiter(code, tokens) {
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var occurences = {
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single: 0,
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double: 0
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};
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var checked = 0;
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for (var i = 0; i < tokens.length; i++) {
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var token = tokens[i];
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if (token.type.label !== "string") continue;
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var raw = code.slice(token.start, token.end);
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if (raw[0] === "'") {
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occurences.single++;
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} else {
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occurences.double++;
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}
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checked++;
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if (checked >= 3) break;
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}
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if (occurences.single > occurences.double) {
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return "single";
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} else {
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return "double";
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}
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};
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/**
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* Generate code and sourcemap from ast.
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*
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* Appends comments that weren't attached to any node to the end of the generated output.
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*/
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CodeGenerator.prototype.generate = function generate() {
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var ast = this.ast;
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this.print(ast);
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if (ast.comments) {
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var comments = [];
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var _arr = ast.comments;
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for (var _i = 0; _i < _arr.length; _i++) {
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var comment = _arr[_i];
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if (!comment._displayed) comments.push(comment);
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}
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this._printComments(comments);
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}
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return {
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map: this.map.get(),
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code: this.buffer.get()
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};
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};
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/**
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* Build NodePrinter.
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*/
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CodeGenerator.prototype.buildPrint = function buildPrint(parent) {
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return new _nodePrinter2["default"](this, parent);
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.catchUp = function catchUp(node, parent, leftParenPrinted) {
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// catch up to this nodes newline if we're behind
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if (node.loc && this.format.retainLines && this.buffer.buf) {
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var needsParens = false;
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if (!leftParenPrinted && parent && this.position.line < node.loc.start.line && t.isTerminatorless(parent)) {
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needsParens = true;
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this._push("(");
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}
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while (this.position.line < node.loc.start.line) {
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this._push("\n");
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}
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return needsParens;
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}
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return false;
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype._printNewline = function _printNewline(leading, node, parent, opts) {
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if (!opts.statement && !_node3["default"].isUserWhitespacable(node, parent)) {
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return;
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}
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var lines = 0;
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if (node.start != null && !node._ignoreUserWhitespace) {
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// user node
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if (leading) {
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lines = this.whitespace.getNewlinesBefore(node);
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} else {
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lines = this.whitespace.getNewlinesAfter(node);
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}
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} else {
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// generated node
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if (!leading) lines++; // always include at least a single line after
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if (opts.addNewlines) lines += opts.addNewlines(leading, node) || 0;
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var needs = _node3["default"].needsWhitespaceAfter;
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if (leading) needs = _node3["default"].needsWhitespaceBefore;
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if (needs(node, parent)) lines++;
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// generated nodes can't add starting file whitespace
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if (!this.buffer.buf) lines = 0;
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}
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this.newline(lines);
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.print = function print(node, parent) {
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var opts = arguments.length <= 2 || arguments[2] === undefined ? {} : arguments[2];
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if (!node) return;
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if (parent && parent._compact) {
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node._compact = true;
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}
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var oldConcise = this.format.concise;
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if (node._compact) {
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this.format.concise = true;
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}
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if (this[node.type]) {
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var needsNoLineTermParens = _node3["default"].needsParensNoLineTerminator(node, parent);
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var needsParens = needsNoLineTermParens || _node3["default"].needsParens(node, parent);
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if (needsParens) this.push("(");
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if (needsNoLineTermParens) this.indent();
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this.printLeadingComments(node, parent);
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var needsParensFromCatchup = this.catchUp(node, parent, needsParens);
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this._printNewline(true, node, parent, opts);
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if (opts.before) opts.before();
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this.map.mark(node, "start");
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this[node.type](node, this.buildPrint(node), parent);
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if (needsNoLineTermParens) {
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this.newline();
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this.dedent();
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}
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if (needsParens || needsParensFromCatchup) this.push(")");
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this.map.mark(node, "end");
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if (opts.after) opts.after();
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this.format.concise = oldConcise;
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this._printNewline(false, node, parent, opts);
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this.printTrailingComments(node, parent);
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} else {
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throw new ReferenceError("unknown node of type " + JSON.stringify(node.type) + " with constructor " + JSON.stringify(node && node.constructor.name));
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}
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.printJoin = function printJoin(print, nodes) {
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var _this = this;
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var opts = arguments.length <= 2 || arguments[2] === undefined ? {} : arguments[2];
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if (!nodes || !nodes.length) return;
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var len = nodes.length;
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if (opts.indent) this.indent();
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var printOpts = {
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statement: opts.statement,
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addNewlines: opts.addNewlines,
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after: function after() {
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if (opts.iterator) {
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opts.iterator(node, i);
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}
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if (opts.separator && i < len - 1) {
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_this.push(opts.separator);
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}
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}
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};
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for (var i = 0; i < nodes.length; i++) {
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var node = nodes[i];
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print.plain(node, printOpts);
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}
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if (opts.indent) this.dedent();
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.printAndIndentOnComments = function printAndIndentOnComments(print, node) {
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var indent = !!node.leadingComments;
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if (indent) this.indent();
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print.plain(node);
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if (indent) this.dedent();
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.printBlock = function printBlock(print, node) {
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if (t.isEmptyStatement(node)) {
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this.semicolon();
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} else {
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this.push(" ");
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print.plain(node);
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}
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.generateComment = function generateComment(comment) {
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var val = comment.value;
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if (comment.type === "CommentLine") {
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val = "//" + val;
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} else {
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val = "/*" + val + "*/";
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}
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return val;
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.printTrailingComments = function printTrailingComments(node, parent) {
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this._printComments(this.getComments("trailingComments", node, parent));
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.printLeadingComments = function printLeadingComments(node, parent) {
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this._printComments(this.getComments("leadingComments", node, parent));
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype.getComments = function getComments(key, node, parent) {
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if (t.isExpressionStatement(parent)) {
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return [];
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}
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var comments = [];
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var nodes = [node];
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if (t.isExpressionStatement(node)) {
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nodes.push(node.argument);
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}
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var _arr2 = nodes;
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for (var _i2 = 0; _i2 < _arr2.length; _i2++) {
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var _node = _arr2[_i2];
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comments = comments.concat(this._getComments(key, _node));
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}
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return comments;
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype._getComments = function _getComments(key, node) {
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return node && node[key] || [];
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};
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/**
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* [Please add a description.]
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*/
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CodeGenerator.prototype._printComments = function _printComments(comments) {
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if (this.format.compact) return;
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if (!this.format.comments) return;
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if (!comments || !comments.length) return;
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var _arr3 = comments;
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for (var _i3 = 0; _i3 < _arr3.length; _i3++) {
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var comment = _arr3[_i3];
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var skip = false;
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if (this.ast.comments) {
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// find the original comment in the ast and set it as displayed
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var _arr4 = this.ast.comments;
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for (var _i4 = 0; _i4 < _arr4.length; _i4++) {
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var origComment = _arr4[_i4];
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if (origComment.start === comment.start) {
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// comment has already been output
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if (origComment._displayed) skip = true;
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origComment._displayed = true;
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break;
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}
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}
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}
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if (skip) return;
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this.catchUp(comment);
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// whitespace before
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this.newline(this.whitespace.getNewlinesBefore(comment));
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var column = this.position.column;
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var val = this.generateComment(comment);
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if (column && !this.isLast(["\n", " ", "[", "{"])) {
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this._push(" ");
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column++;
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}
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//
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if (comment.type === "CommentBlock" && this.format.indent.adjustMultilineComment) {
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var offset = comment.loc && comment.loc.start.column;
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if (offset) {
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var newlineRegex = new RegExp("\\n\\s{1," + offset + "}", "g");
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val = val.replace(newlineRegex, "\n");
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}
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var indent = Math.max(this.indentSize(), column);
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val = val.replace(/\n/g, "\n" + _repeating2["default"](" ", indent));
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}
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if (column === 0) {
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val = this.getIndent() + val;
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}
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// force a newline for line comments when retainLines is set in case the next printed node
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// doesn't catch up
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if (this.format.retainLines && comment.type === "CommentLine") {
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val += "\n";
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}
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//
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this._push(val);
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// whitespace after
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this.newline(this.whitespace.getNewlinesAfter(comment));
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}
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};
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_createClass(CodeGenerator, null, [{
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key: "generators",
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/**
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* All node generators.
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*/
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value: {
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templateLiterals: require("./generators/template-literals"),
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comprehensions: require("./generators/comprehensions"),
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expressions: require("./generators/expressions"),
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statements: require("./generators/statements"),
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classes: require("./generators/classes"),
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methods: require("./generators/methods"),
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modules: require("./generators/modules"),
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types: require("./generators/types"),
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flow: require("./generators/flow"),
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base: require("./generators/base"),
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jsx: require("./generators/jsx")
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},
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enumerable: true
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}]);
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return CodeGenerator;
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})();
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/**
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* [Please add a description.]
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*/
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_lodashCollectionEach2["default"](_buffer2["default"].prototype, function (fn, key) {
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CodeGenerator.prototype[key] = function () {
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return fn.apply(this.buffer, arguments);
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};
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});
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/**
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* [Please add a description.]
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*/
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_lodashCollectionEach2["default"](CodeGenerator.generators, function (generator) {
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_lodashObjectExtend2["default"](CodeGenerator.prototype, generator);
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});
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/**
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* [Please add a description.]
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*/
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module.exports = function (ast, opts, code) {
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var gen = new CodeGenerator(ast, opts, code);
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return gen.generate();
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};
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module.exports.CodeGenerator = CodeGenerator; |