codegen-utils.js

/*
 * Copyright (c) 2014-2018 MKLab. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 */

/**
 * CodeWriter
 */
class CodeWriter {
  /**
   * @constructor
   */
  constructor (indentString) {
    /** @member {Array.<string>} lines */
    this.lines = []

    /** @member {string} indentString */
    this.indentString = indentString || '    ' // default 4 spaces

    /** @member {Array.<string>} indentations */
    this.indentations = []
  }

  /**
   * Indent
   */
  indent () {
    this.indentations.push(this.indentString)
  }

  /**
   * Outdent
   */
  outdent () {
    this.indentations.splice(this.indentations.length - 1, 1)
  }

  /**
   * Write a line
   * @param {string} line
   */
  writeLine (line) {
    if (line) {
      this.lines.push(this.indentations.join('') + line)
    } else {
      this.lines.push('')
    }
  }

  /**
   * Return as all string data
   * @return {string}
   */
  getData () {
    return this.lines.join('\n')
  }

}

exports.CodeWriter = CodeWriter