/*
 *  jQuery table2excel - v1.1.1
 *  jQuery plugin to export an .xls file in browser from an HTML table
 *  https://github.com/rainabba/jquery-table2excel
 *
 *  Made by rainabba
 *  Under MIT License
 *  
 *  添加功能：导出表格边框，文字居中
 */
//table2excel.js
;(function ( $, window, document, undefined ) {
  var pluginName = "table2excel",

  defaults = {
      exclude: ".noExl",
      name: "Table2Excel",
      filename: "table2excel",
      fileext: ".xls",
      exclude_img: true,
      exclude_links: true,
      exclude_inputs: true
  };

  // The actual plugin constructor
  function Plugin ( element, options ) {
          this.element = element;
          // jQuery has an extend method which merges the contents of two or
          // more objects, storing the result in the first object. The first object
          // is generally empty as we don't want to alter the default options for
          // future instances of the plugin
          //
          this.settings = $.extend( {}, defaults, options );
          this._defaults = defaults;
          this._name = pluginName;
          this.init();
  }

  Plugin.prototype = {
      init: function () {
          var e = this;

          var utf8Heading = "<meta http-equiv=\"content-type\" content=\"application/vnd.ms-excel; charset=UTF-8\">";
          e.template = {
              head: "<html xmlns:o=\"urn:schemas-microsoft-com:office:office\" xmlns:x=\"urn:schemas-microsoft-com:office:excel\" xmlns=\"http://www.w3.org/TR/REC-html40\">" + utf8Heading + "<head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets>",
              sheet: {
                  head: "<x:ExcelWorksheet><x:Name>",
                  tail: "</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet>"
              },
              mid: "</x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body>",
              table: {
                  head: "<table border='1'>",//表格边框
                  tail: "</table>"
              },
              foot: "</body></html>"
          };

          e.tableRows = [];

          // get contents of table except for exclude
          $(e.element).each( function(i,o) {
              var tempRows = "";
              $(o).find("tr").not(e.settings.exclude).each(function (i,p) {

                  tempRows += "<tr align='center' valign='center' >"; //文字居中
                  $(p).find("td,th").not(e.settings.exclude).each(function (i,q) { // p did not exist, I corrected

                      var rc = {
                          rows: $(this).attr("rowspan"),
                          cols: $(this).attr("colspan"),
                          flag: $(q).find(e.settings.exclude)
                      };

                      if( rc.flag.length > 0 ) {
                          tempRows += "<td align='center' valign='center' > </td>"; // exclude it!! //文字居中
                      } else {
                          tempRows += "<td align='center' valign='center' "; //文字居中
                          if( rc.rows > 0) {
                              tempRows += " rowspan=\'" + rc.rows + "\' ";
                          }
                          if( rc.cols > 0) {
                              tempRows += " colspan=\'" + rc.cols + "\' ";
                          }
                          tempRows += "/>" + $(q).html() + "</td>";
                      }
                  });

                  tempRows += "</tr>";

              });
              // exclude img tags
              if(e.settings.exclude_img) {
                  tempRows = exclude_img(tempRows);
              }

              // exclude link tags
              if(e.settings.exclude_links) {
                  tempRows = exclude_links(tempRows);
              }

              // exclude input tags
              if(e.settings.exclude_inputs) {
                  tempRows = exclude_inputs(tempRows);
              }
              e.tableRows.push(tempRows);
          });

          e.tableToExcel(e.tableRows, e.settings.name, e.settings.sheetName);
      },

      tableToExcel: function (table, name, sheetName) {
          var e = this, fullTemplate="", i, link, a;

          e.format = function (s, c) {
              return s.replace(/{(\w+)}/g, function (m, p) {
                  return c[p];
              });
          };

          sheetName = typeof sheetName === "undefined" ? "Sheet" : sheetName;

          e.ctx = {
              worksheet: name || "Worksheet",
              table: table,
              sheetName: sheetName
          };

          fullTemplate= e.template.head;

          if ( $.isArray(table) ) {
               Object.keys(table).forEach(function(i){
                    //fullTemplate += e.template.sheet.head + "{worksheet" + i + "}" + e.template.sheet.tail;
                    fullTemplate += e.template.sheet.head + sheetName + i + e.template.sheet.tail;
              });
          }

          fullTemplate += e.template.mid;

          if ( $.isArray(table) ) {
               Object.keys(table).forEach(function(i){
                  fullTemplate += e.template.table.head + "{table" + i + "}" + e.template.table.tail;
              });
          }

          fullTemplate += e.template.foot;

          for (i in table) {
              e.ctx["table" + i] = table[i];
          }
          delete e.ctx.table;

          var isIE = /*@cc_on!@*/false || !!document.documentMode; // this works with IE10 and IE11 both :)
          //if (typeof msie !== "undefined" && msie > 0 || !!navigator.userAgent.match(/Trident.*rv\:11\./))      // this works ONLY with IE 11!!!
          if (isIE) {
              if (typeof Blob !== "undefined") {
                  //use blobs if we can
                  fullTemplate = e.format(fullTemplate, e.ctx); // with this, works with IE
                  fullTemplate = [fullTemplate];
                  //convert to array
                  var blob1 = new Blob(fullTemplate, { type: "text/html" });
                  window.navigator.msSaveBlob(blob1, getFileName(e.settings) );
              } else {
                  //otherwise use the iframe and save
                  //requires a blank iframe on page called txtArea1
                  txtArea1.document.open("text/html", "replace");
                  txtArea1.document.write(e.format(fullTemplate, e.ctx));
                  txtArea1.document.close();
                  txtArea1.focus();
                  sa = txtArea1.document.execCommand("SaveAs", true, getFileName(e.settings) );
              }

          } else {
              var blob = new Blob([e.format(fullTemplate, e.ctx)], {type: "application/vnd.ms-excel"});
              window.URL = window.URL || window.webkitURL;
              link = window.URL.createObjectURL(blob);
              a = document.createElement("a");
              a.download = getFileName(e.settings);
              a.href = link;

              document.body.appendChild(a);

              a.click();

              document.body.removeChild(a);
          }

          return true;
      }
  };

  function getFileName(settings) {
      return ( settings.filename ? settings.filename : "table2excel" );
  }

  // Removes all img tags
  function exclude_img(string) {
      var _patt = /(\s+alt\s*=\s*"([^"]*)"|\s+alt\s*=\s*'([^']*)')/i;
      return string.replace(/<img[^>]*>/gi, function myFunction(x){
          var res = _patt.exec(x);
          if (res !== null && res.length >=2) {
              return res[2];
          } else {
              return "";
          }
      });
  }

  // Removes all link tags
  function exclude_links(string) {
      return string.replace(/<a[^>]*>|<\/a>/gi, "");
  }

  // Removes input params
  function exclude_inputs(string) {
      var _patt = /(\s+value\s*=\s*"([^"]*)"|\s+value\s*=\s*'([^']*)')/i;
      return string.replace(/<input[^>]*>|<\/input>/gi, function myFunction(x){
          var res = _patt.exec(x);
          if (res !== null && res.length >=2) {
              return res[2];
          } else {
              return "";
          }
      });
  }

  $.fn[ pluginName ] = function ( options ) {
      var e = this;
          e.each(function() {
              if ( !$.data( e, "plugin_" + pluginName ) ) {
                  $.data( e, "plugin_" + pluginName, new Plugin( this, options ) );
              }
          });

      // chain jQuery functions
      return e;
  };

})( jQuery, window, document );

