@babel/generator/lib/printer.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _isInteger = _interopRequireDefault(require("lodash/isInteger"));

var _repeat = _interopRequireDefault(require("lodash/repeat"));

var _buffer = _interopRequireDefault(require("./buffer"));

var n = _interopRequireWildcard(require("./node"));

var t = _interopRequireWildcard(require("@babel/types"));

var generatorFunctions = _interopRequireWildcard(require("./generators"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

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

const SCIENTIFIC_NOTATION = /e/i;
const ZERO_DECIMAL_INTEGER = /\.0+$/;
const NON_DECIMAL_LITERAL = /^0[box]/;
const PURE_ANNOTATION_RE = /^\s*[@#]__PURE__\s*$/;

class Printer {
  constructor(format, map) {
    this.inForStatementInitCounter = 0;
    this._printStack = [];
    this._indent = 0;
    this._insideAux = false;
    this._printedCommentStarts = {};
    this._parenPushNewlineState = null;
    this._noLineTerminator = false;
    this._printAuxAfterOnNextUserNode = false;
    this._printedComments = new WeakSet();
    this._endsWithInteger = false;
    this._endsWithWord = false;
    this.format = format || {};
    this._buf = new _buffer.default(map);
  }

  generate(ast) {
    this.print(ast);

    this._maybeAddAuxComment();

    return this._buf.get();
  }

  indent() {
    if (this.format.compact || this.format.concise) return;
    this._indent++;
  }

  dedent() {
    if (this.format.compact || this.format.concise) return;
    this._indent--;
  }

  semicolon(force = false) {
    this._maybeAddAuxComment();

    this._append(";", !force);
  }

  rightBrace() {
    if (this.format.minified) {
      this._buf.removeLastSemicolon();
    }

    this.token("}");
  }

  space(force = false) {
    if (this.format.compact) return;

    if (this._buf.hasContent() && !this.endsWith(" ") && !this.endsWith("\n") || force) {
      this._space();
    }
  }

  word(str) {
    if (this._endsWithWord || this.endsWith("/") && str.indexOf("/") === 0) {
      this._space();
    }

    this._maybeAddAuxComment();

    this._append(str);

    this._endsWithWord = true;
  }

  number(str) {
    this.word(str);
    this._endsWithInteger = (0, _isInteger.default)(+str) && !NON_DECIMAL_LITERAL.test(str) && !SCIENTIFIC_NOTATION.test(str) && !ZERO_DECIMAL_INTEGER.test(str) && str[str.length - 1] !== ".";
  }

  token(str) {
    if (str === "--" && this.endsWith("!") || str[0] === "+" && this.endsWith("+") || str[0] === "-" && this.endsWith("-") || str[0] === "." && this._endsWithInteger) {
      this._space();
    }

    this._maybeAddAuxComment();

    this._append(str);
  }

  newline(i) {
    if (this.format.retainLines || this.format.compact) return;

    if (this.format.concise) {
      this.space();
      return;
    }

    if (this.endsWith("\n\n")) return;
    if (typeof i !== "number") i = 1;
    i = Math.min(2, i);
    if (this.endsWith("{\n") || this.endsWith(":\n")) i--;
    if (i <= 0) return;

    for (let j = 0; j < i; j++) {
      this._newline();
    }
  }

  endsWith(str) {
    return this._buf.endsWith(str);
  }

  removeTrailingNewline() {
    this._buf.removeTrailingNewline();
  }

  exactSource(loc, cb) {
    this._catchUp("start", loc);

    this._buf.exactSource(loc, cb);
  }

  source(prop, loc) {
    this._catchUp(prop, loc);

    this._buf.source(prop, loc);
  }

  withSource(prop, loc, cb) {
    this._catchUp(prop, loc);

    this._buf.withSource(prop, loc, cb);
  }

  _space() {
    this._append(" ", true);
  }

  _newline() {
    this._append("\n", true);
  }

  _append(str, queue = false) {
    this._maybeAddParen(str);

    this._maybeIndent(str);

    if (queue) this._buf.queue(str);else this._buf.append(str);
    this._endsWithWord = false;
    this._endsWithInteger = false;
  }

  _maybeIndent(str) {
    if (this._indent && this.endsWith("\n") && str[0] !== "\n") {
      this._buf.queue(this._getIndent());
    }
  }

  _maybeAddParen(str) {
    const parenPushNewlineState = this._parenPushNewlineState;
    if (!parenPushNewlineState) return;
    this._parenPushNewlineState = null;
    let i;

    for (i = 0; i < str.length && str[i] === " "; i++) continue;

    if (i === str.length) return;
    const cha = str[i];

    if (cha !== "\n") {
      if (cha !== "/") return;
      if (i + 1 === str.length) return;
      const chaPost = str[i + 1];
      if (chaPost !== "/" && chaPost !== "*") return;
    }

    this.token("(");
    this.indent();
    parenPushNewlineState.printed = true;
  }

  _catchUp(prop, loc) {
    if (!this.format.retainLines) return;
    const pos = loc ? loc[prop] : null;

    if (pos && pos.line !== null) {
      const count = pos.line - this._buf.getCurrentLine();

      for (let i = 0; i < count; i++) {
        this._newline();
      }
    }
  }

  _getIndent() {
    return (0, _repeat.default)(this.format.indent.style, this._indent);
  }

  startTerminatorless(isLabel = false) {
    if (isLabel) {
      this._noLineTerminator = true;
      return null;
    } else {
      return this._parenPushNewlineState = {
        printed: false
      };
    }
  }

  endTerminatorless(state) {
    this._noLineTerminator = false;

    if (state && state.printed) {
      this.dedent();
      this.newline();
      this.token(")");
    }
  }

  print(node, parent) {
    if (!node) return;
    const oldConcise = this.format.concise;

    if (node._compact) {
      this.format.concise = true;
    }

    const printMethod = this[node.type];

    if (!printMethod) {
      throw new ReferenceError(`unknown node of type ${JSON.stringify(node.type)} with constructor ${JSON.stringify(node && node.constructor.name)}`);
    }

    this._printStack.push(node);

    const oldInAux = this._insideAux;
    this._insideAux = !node.loc;

    this._maybeAddAuxComment(this._insideAux && !oldInAux);

    let needsParens = n.needsParens(node, parent, this._printStack);

    if (this.format.retainFunctionParens && node.type === "FunctionExpression" && node.extra && node.extra.parenthesized) {
      needsParens = true;
    }

    if (needsParens) this.token("(");

    this._printLeadingComments(node);

    const loc = t.isProgram(node) || t.isFile(node) ? null : node.loc;
    this.withSource("start", loc, () => {
      printMethod.call(this, node, parent);
    });

    this._printTrailingComments(node);

    if (needsParens) this.token(")");

    this._printStack.pop();

    this.format.concise = oldConcise;
    this._insideAux = oldInAux;
  }

  _maybeAddAuxComment(enteredPositionlessNode) {
    if (enteredPositionlessNode) this._printAuxBeforeComment();
    if (!this._insideAux) this._printAuxAfterComment();
  }

  _printAuxBeforeComment() {
    if (this._printAuxAfterOnNextUserNode) return;
    this._printAuxAfterOnNextUserNode = true;
    const comment = this.format.auxiliaryCommentBefore;

    if (comment) {
      this._printComment({
        type: "CommentBlock",
        value: comment
      });
    }
  }

  _printAuxAfterComment() {
    if (!this._printAuxAfterOnNextUserNode) return;
    this._printAuxAfterOnNextUserNode = false;
    const comment = this.format.auxiliaryCommentAfter;

    if (comment) {
      this._printComment({
        type: "CommentBlock",
        value: comment
      });
    }
  }

  getPossibleRaw(node) {
    const extra = node.extra;

    if (extra && extra.raw != null && extra.rawValue != null && node.value === extra.rawValue) {
      return extra.raw;
    }
  }

  printJoin(nodes, parent, opts = {}) {
    if (!nodes || !nodes.length) return;
    if (opts.indent) this.indent();
    const newlineOpts = {
      addNewlines: opts.addNewlines
    };

    for (let i = 0; i < nodes.length; i++) {
      const node = nodes[i];
      if (!node) continue;
      if (opts.statement) this._printNewline(true, node, parent, newlineOpts);
      this.print(node, parent);

      if (opts.iterator) {
        opts.iterator(node, i);
      }

      if (opts.separator && i < nodes.length - 1) {
        opts.separator.call(this);
      }

      if (opts.statement) this._printNewline(false, node, parent, newlineOpts);
    }

    if (opts.indent) this.dedent();
  }

  printAndIndentOnComments(node, parent) {
    const indent = node.leadingComments && node.leadingComments.length > 0;
    if (indent) this.indent();
    this.print(node, parent);
    if (indent) this.dedent();
  }

  printBlock(parent) {
    const node = parent.body;

    if (!t.isEmptyStatement(node)) {
      this.space();
    }

    this.print(node, parent);
  }

  _printTrailingComments(node) {
    this._printComments(this._getComments(false, node));
  }

  _printLeadingComments(node) {
    this._printComments(this._getComments(true, node), true);
  }

  printInnerComments(node, indent = true) {
    if (!node.innerComments || !node.innerComments.length) return;
    if (indent) this.indent();

    this._printComments(node.innerComments);

    if (indent) this.dedent();
  }

  printSequence(nodes, parent, opts = {}) {
    opts.statement = true;
    return this.printJoin(nodes, parent, opts);
  }

  printList(items, parent, opts = {}) {
    if (opts.separator == null) {
      opts.separator = commaSeparator;
    }

    return this.printJoin(items, parent, opts);
  }

  _printNewline(leading, node, parent, opts) {
    if (this.format.retainLines || this.format.compact) return;

    if (this.format.concise) {
      this.space();
      return;
    }

    let lines = 0;

    if (this._buf.hasContent()) {
      if (!leading) lines++;
      if (opts.addNewlines) lines += opts.addNewlines(leading, node) || 0;
      const needs = leading ? n.needsWhitespaceBefore : n.needsWhitespaceAfter;
      if (needs(node, parent)) lines++;
    }

    this.newline(lines);
  }

  _getComments(leading, node) {
    return node && (leading ? node.leadingComments : node.trailingComments) || [];
  }

  _printComment(comment, skipNewLines) {
    if (!this.format.shouldPrintComment(comment.value)) return;
    if (comment.ignore) return;
    if (this._printedComments.has(comment)) return;

    this._printedComments.add(comment);

    if (comment.start != null) {
      if (this._printedCommentStarts[comment.start]) return;
      this._printedCommentStarts[comment.start] = true;
    }

    const isBlockComment = comment.type === "CommentBlock";
    const printNewLines = isBlockComment && !skipNewLines && !this._noLineTerminator;
    if (printNewLines && this._buf.hasContent()) this.newline(1);
    if (!this.endsWith("[") && !this.endsWith("{")) this.space();
    let val = !isBlockComment && !this._noLineTerminator ? `//${comment.value}\n` : `/*${comment.value}*/`;

    if (isBlockComment && this.format.indent.adjustMultilineComment) {
      const offset = comment.loc && comment.loc.start.column;

      if (offset) {
        const newlineRegex = new RegExp("\\n\\s{1," + offset + "}", "g");
        val = val.replace(newlineRegex, "\n");
      }

      const indentSize = Math.max(this._getIndent().length, this._buf.getCurrentColumn());
      val = val.replace(/\n(?!$)/g, `\n${(0, _repeat.default)(" ", indentSize)}`);
    }

    if (this.endsWith("/")) this._space();
    this.withSource("start", comment.loc, () => {
      this._append(val);
    });
    if (printNewLines) this.newline(1);
  }

  _printComments(comments, inlinePureAnnotation) {
    if (!comments || !comments.length) return;

    if (inlinePureAnnotation && comments.length === 1 && PURE_ANNOTATION_RE.test(comments[0].value)) {
      this._printComment(comments[0], this._buf.hasContent() && !this.endsWith("\n"));
    } else {
      for (const comment of comments) {
        this._printComment(comment);
      }
    }
  }

}

exports.default = Printer;
Object.assign(Printer.prototype, generatorFunctions);

function commaSeparator() {
  this.token(",");
  this.space();
}