# modules/total_pages.js

    /* global jsPDF */
    /**
     * @license
     * ====================================================================
     * Copyright (c) 2013 Eduardo Menezes de Morais, eduardo.morais@usp.br
     *
     * 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.
     * ====================================================================
     */
    /**
     * jsPDF total_pages plugin
     * @name total_pages
     * @module
     */
    (function (jsPDFAPI) {
        'use strict';
      /**
      * @name putTotalPages
      * @function
      * @param {string} pageExpression Regular Expression
      * @returns {jsPDF} jsPDF-instance
      */

      jsPDFAPI.putTotalPages = function (pageExpression) {
        'use strict';

        var replaceExpression;
        var totalNumberOfPages = 0;
        if (parseInt(this.internal.getFont().id.substr(1), 10) < 15) {
          replaceExpression = new RegExp(pageExpression, 'g');
          totalNumberOfPages = this.internal.getNumberOfPages();
        } else {
          replaceExpression = new RegExp(this.pdfEscape16(pageExpression, this.internal.getFont()), 'g');
          totalNumberOfPages = this.pdfEscape16(this.internal.getNumberOfPages() + '', this.internal.getFont());
        }

        for (var n = 1; n <= this.internal.getNumberOfPages(); n++) {
          for (var i = 0; i < this.internal.pages[n].length; i++) {
            this.internal.pages[n][i] = this.internal.pages[n][i].replace(replaceExpression, totalNumberOfPages);
          }
        }

        return this;
      }
    })(jsPDF.API);