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Filename : makegrid.js
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/* global firstDayOfCalendar */ // templates/javascript/variables.twig

/**
 * Create advanced table (resize, reorder, and show/hide columns; and also grid editing).
 * This function is designed mainly for table DOM generated from browsing a table in the database.
 * For using this function in other table DOM, you may need to:
 * - add "draggable" class in the table header <th>, in order to make it resizable, sortable or hidable
 * - have at least one non-"draggable" header in the table DOM for placing column visibility drop-down arrow
 * - pass the value "false" for the parameter "enableGridEdit"
 * - adjust other parameter value, to select which features that will be enabled
 *
 * @param t the table DOM element
 * @param enableResize Optional, if false, column resizing feature will be disabled
 * @param enableReorder Optional, if false, column reordering feature will be disabled
 * @param enableVisib Optional, if false, show/hide column feature will be disabled
 * @param enableGridEdit Optional, if false, grid editing feature will be disabled
 */
// eslint-disable-next-line no-unused-vars
var makeGrid = function (t, enableResize, enableReorder, enableVisib, enableGridEdit) {
  var isResizeEnabled = enableResize === undefined ? true : enableResize;
  var isReorderEnabled = enableReorder === undefined ? true : enableReorder;
  var isVisibEnabled = enableVisib === undefined ? true : enableVisib;
  var isGridEditEnabled = enableGridEdit === undefined ? true : enableGridEdit;
  var g = {
    /** *********
     * Constant
     ***********/
    minColWidth: 15,
    /** *********
     * Variables, assigned with default value, changed later
     ***********/
    actionSpan: 5,
    // number of colspan in Actions header in a table
    tableCreateTime: null,
    // table creation time, used for saving column order and visibility to server, only available in "Browse tab"

    // Column reordering variables
    colOrder: [],
    // array of column order

    // Column visibility variables
    colVisib: [],
    // array of column visibility
    showAllColText: '',
    // string, text for "show all" button under column visibility list
    visibleHeadersCount: 0,
    // number of visible data headers

    // Table hint variables
    reorderHint: '',
    // string, hint for column reordering
    sortHint: '',
    // string, hint for column sorting
    markHint: '',
    // string, hint for column marking
    copyHint: '',
    // string, hint for copy column name
    showReorderHint: false,
    showSortHint: false,
    showMarkHint: false,
    // Grid editing
    isCellEditActive: false,
    // true if current focus is in edit cell
    isEditCellTextEditable: false,
    // true if current edit cell is editable in the text input box (not textarea)
    currentEditCell: null,
    // reference to <td> that currently being edited
    cellEditHint: '',
    // hint shown when doing grid edit
    gotoLinkText: '',
    // "Go to link" text
    wasEditedCellNull: false,
    // true if last value of the edited cell was NULL
    maxTruncatedLen: 0,
    // number of characters that can be displayed in a cell
    saveCellsAtOnce: false,
    // $cfg[saveCellsAtOnce]
    isCellEdited: false,
    // true if at least one cell has been edited
    saveCellWarning: '',
    // string, warning text when user want to leave a page with unsaved edited data
    lastXHR: null,
    // last XHR object used in AJAX request
    isSaving: false,
    // true when currently saving edited data, used to handle double posting caused by pressing ENTER in grid edit text box in Chrome browser
    alertNonUnique: '',
    // string, alert shown when saving edited nonunique table

    // Common hidden inputs
    token: null,
    server: null,
    db: null,
    table: null,
    /** **********
     * Functions
     ************/

    /**
     * Start to resize column. Called when clicking on column separator.
     *
     * @param e event
     * @param obj dragged div object
     */
    dragStartRsz: function (e, obj) {
      var n = $(g.cRsz).find('div').index(obj); // get the index of separator (i.e., column index)
      $(obj).addClass('colborder_active');
      g.colRsz = {
        x0: e.pageX,
        n: n,
        obj: obj,
        objLeft: $(obj).position().left,
        objWidth: $(g.t).find('th.draggable:visible').eq(n).find('span').outerWidth()
      };
      // eslint-disable-next-line compat/compat
      $(document.body).css('cursor', 'col-resize').noSelect();
      if (g.isCellEditActive) {
        g.hideEditCell();
      }
    },
    /**
     * Start to reorder column. Called when clicking on table header.
     *
     * @param e event
     * @param obj table header object
     */
    dragStartReorder: function (e, obj) {
      // prepare the cCpy (column copy) and cPointer (column pointer) from the dragged column
      $(g.cCpy).text($(obj).text());
      var objPos = $(obj).position();
      $(g.cCpy).css({
        top: objPos.top + 20,
        left: objPos.left,
        height: $(obj).height(),
        width: $(obj).width()
      });
      $(g.cPointer).css({
        top: objPos.top
      });

      // get the column index, zero-based
      var n = g.getHeaderIdx(obj);
      g.colReorder = {
        x0: e.pageX,
        y0: e.pageY,
        n: n,
        newn: n,
        obj: obj,
        objTop: objPos.top,
        objLeft: objPos.left
      };

      // eslint-disable-next-line compat/compat
      $(document.body).css('cursor', 'move').noSelect();
      if (g.isCellEditActive) {
        g.hideEditCell();
      }
    },
    /**
     * Handle mousemove event when dragging.
     *
     * @param e event
     */
    dragMove: function (e) {
      var dx;
      if (g.colRsz) {
        dx = e.pageX - g.colRsz.x0;
        if (g.colRsz.objWidth + dx > g.minColWidth) {
          $(g.colRsz.obj).css('left', g.colRsz.objLeft + dx + 'px');
        }
      } else if (g.colReorder) {
        // dragged column animation
        dx = e.pageX - g.colReorder.x0;
        $(g.cCpy).css('left', g.colReorder.objLeft + dx).show();

        // pointer animation
        var hoveredCol = g.getHoveredCol(e);
        if (hoveredCol) {
          var newn = g.getHeaderIdx(hoveredCol);
          g.colReorder.newn = newn;
          if (newn !== g.colReorder.n) {
            // show the column pointer in the right place
            var colPos = $(hoveredCol).position();
            var newleft = newn < g.colReorder.n ? colPos.left : colPos.left + $(hoveredCol).outerWidth();
            $(g.cPointer).css({
              left: newleft,
              visibility: 'visible'
            });
          } else {
            // no movement to other column, hide the column pointer
            $(g.cPointer).css('visibility', 'hidden');
          }
        }
      }
    },
    /**
     * Stop the dragging action.
     *
     * @param e event
     */
    dragEnd: function (e) {
      if (g.colRsz) {
        var dx = e.pageX - g.colRsz.x0;
        var nw = g.colRsz.objWidth + dx;
        if (nw < g.minColWidth) {
          nw = g.minColWidth;
        }
        var n = g.colRsz.n;
        // do the resizing
        g.resize(n, nw);
        g.reposRsz();
        g.reposDrop();
        g.colRsz = false;
        $(g.cRsz).find('div').removeClass('colborder_active');
      } else if (g.colReorder) {
        // shift columns
        if (g.colReorder.newn !== g.colReorder.n) {
          g.shiftCol(g.colReorder.n, g.colReorder.newn);
          // assign new position
          var objPos = $(g.colReorder.obj).position();
          g.colReorder.objTop = objPos.top;
          g.colReorder.objLeft = objPos.left;
          g.colReorder.n = g.colReorder.newn;
          // send request to server to remember the column order
          if (g.tableCreateTime) {
            g.sendColPrefs();
          }
          g.refreshRestoreButton();
        }

        // animate new column position
        $(g.cCpy).stop(true, true).animate({
          top: g.colReorder.objTop,
          left: g.colReorder.objLeft
        }, 'fast').fadeOut();
        $(g.cPointer).css('visibility', 'hidden');
        g.colReorder = false;
      }
      // eslint-disable-next-line compat/compat
      $(document.body).css('cursor', 'inherit').noSelect(false);
    },
    /**
     * Resize column n to new width "nw"
     *
     * @param n zero-based column index
     * @param nw new width of the column in pixel
     */
    resize: function (n, nw) {
      $(g.t).find('tr').each(function () {
        $(this).find('th.draggable:visible').eq(n).find('span').add($(this).find('td:visible').eq(g.actionSpan + n).find('span')).css('width', nw);
      });
    },
    /**
     * Reposition column resize bars.
     */
    reposRsz: function () {
      $(g.cRsz).find('div').hide();
      var $firstRowCols = $(g.t).find('tr').first().find('th.draggable:visible');
      var $resizeHandles = $(g.cRsz).find('div').removeClass('condition');
      $(g.t).find('table.pma_table').find('thead th').first().removeClass('before-condition');
      for (var n = 0, l = $firstRowCols.length; n < l; n++) {
        var $col = $($firstRowCols[n]);
        var colWidth;
        if (navigator.userAgent.toLowerCase().indexOf('safari') !== -1) {
          colWidth = $col.outerWidth();
        } else {
          colWidth = $col.outerWidth(true);
        }
        $($resizeHandles[n]).css('left', $col.position().left + colWidth).show();
        if ($col.hasClass('condition')) {
          $($resizeHandles[n]).addClass('condition');
          if (n > 0) {
            $($resizeHandles[n - 1]).addClass('condition');
          }
        }
      }
      if ($($resizeHandles[0]).hasClass('condition')) {
        $(g.t).find('thead th').first().addClass('before-condition');
      }
      $(g.cRsz).css('height', $(g.t).height());
    },
    /**
     * Shift column from index oldn to newn.
     *
     * @param oldn old zero-based column index
     * @param newn new zero-based column index
     */
    shiftCol: function (oldn, newn) {
      $(g.t).find('tr').each(function () {
        if (newn < oldn) {
          $(this).find('th.draggable').eq(newn).add($(this).find('td').eq(g.actionSpan + newn)).before($(this).find('th.draggable').eq(oldn).add($(this).find('td').eq(g.actionSpan + oldn)));
        } else {
          $(this).find('th.draggable').eq(newn).add($(this).find('td').eq(g.actionSpan + newn)).after($(this).find('th.draggable').eq(oldn).add($(this).find('td').eq(g.actionSpan + oldn)));
        }
      });
      // reposition the column resize bars
      g.reposRsz();

      // adjust the column visibility list
      if (newn < oldn) {
        $(g.cList).find('.lDiv div').eq(newn).before($(g.cList).find('.lDiv div').eq(oldn));
      } else {
        $(g.cList).find('.lDiv div').eq(newn).after($(g.cList).find('.lDiv div').eq(oldn));
      }
      // adjust the colOrder
      var tmp = g.colOrder[oldn];
      g.colOrder.splice(oldn, 1);
      g.colOrder.splice(newn, 0, tmp);
      // adjust the colVisib
      if (g.colVisib.length > 0) {
        tmp = g.colVisib[oldn];
        g.colVisib.splice(oldn, 1);
        g.colVisib.splice(newn, 0, tmp);
      }
    },
    /**
     * Find currently hovered table column's header (excluding actions column).
     *
     * @param e event
     * @return {object|undefined} the hovered column's th object or undefined if no hovered column found.
     */
    getHoveredCol: function (e) {
      var hoveredCol;
      var $headers = $(g.t).find('th.draggable:visible');
      $headers.each(function () {
        var left = $(this).offset().left;
        var right = left + $(this).outerWidth();
        if (left <= e.pageX && e.pageX <= right) {
          hoveredCol = this;
        }
      });
      return hoveredCol;
    },
    /**
     * Get a zero-based index from a <th class="draggable"> tag in a table.
     *
     * @param obj table header <th> object
     * @return {number} zero-based index of the specified table header in the set of table headers (visible or not)
     */
    getHeaderIdx: function (obj) {
      return $(obj).parents('tr').find('th.draggable').index(obj);
    },
    /**
     * Reposition the columns back to normal order.
     */
    restoreColOrder: function () {
      // use insertion sort, since we already have shiftCol function
      for (var i = 1; i < g.colOrder.length; i++) {
        var x = g.colOrder[i];
        var j = i - 1;
        while (j >= 0 && x < g.colOrder[j]) {
          j--;
        }
        if (j !== i - 1) {
          g.shiftCol(i, j + 1);
        }
      }
      if (g.tableCreateTime) {
        // send request to server to remember the column order
        g.sendColPrefs();
      }
      g.refreshRestoreButton();
    },
    /**
     * Send column preferences (column order and visibility) to the server.
     */
    sendColPrefs: function () {
      if ($(g.t).is('.ajax')) {
        // only send preferences if ajax class
        if (typeof g.db !== 'string' && typeof g.table !== 'string') {
          // The server has nothing to do with it
          // Issue: https://github.com/phpmyadmin/phpmyadmin/issues/15658
          return;
        }
        var postParams = {
          'ajax_request': true,
          'db': g.db,
          'table': g.table,
          'token': g.token,
          'server': g.server,
          'table_create_time': g.tableCreateTime
        };
        if (g.colOrder.length > 0) {
          $.extend(postParams, {
            'col_order': g.colOrder.toString()
          });
        }
        if (g.colVisib.length > 0) {
          $.extend(postParams, {
            'col_visib': g.colVisib.toString()
          });
        }
        $.post('index.php?route=/sql/set-column-preferences', postParams, function (data) {
          if (data.success !== true) {
            var $tempDiv = $(document.createElement('div'));
            $tempDiv.html(data.error);
            $tempDiv.addClass('alert alert-danger');
            Functions.ajaxShowMessage($tempDiv, false);
          }
        });
      }
    },
    /**
     * Refresh restore button state.
     * Make restore button disabled if the table is similar with initial state.
     */
    refreshRestoreButton: function () {
      // check if table state is as initial state
      var isInitial = true;
      for (var i = 0; i < g.colOrder.length; i++) {
        if (g.colOrder[i] !== i) {
          isInitial = false;
          break;
        }
      }
      // check if only one visible column left
      var isOneColumn = g.visibleHeadersCount === 1;
      // enable or disable restore button
      if (isInitial || isOneColumn) {
        $(g.o).find('div.restore_column').hide();
      } else {
        $(g.o).find('div.restore_column').show();
      }
    },
    /**
     * Update current hint using the boolean values (showReorderHint, showSortHint, etc.).
     *
     * @return {string}
     *
     */
    updateHint: function () {
      var text = '';
      if (!g.colRsz && !g.colReorder) {
        // if not resizing or dragging
        if (g.visibleHeadersCount > 1) {
          g.showReorderHint = true;
        }
        if ($(t).find('th.marker').length > 0) {
          g.showMarkHint = true;
        }
        if (g.showSortHint && g.sortHint) {
          text += text.length > 0 ? '<br>' : '';
          text += '- ' + g.sortHint;
        }
        if (g.showMultiSortHint && g.strMultiSortHint) {
          text += text.length > 0 ? '<br>' : '';
          text += '- ' + g.strMultiSortHint;
        }
        if (g.showMarkHint && g.markHint && !g.showSortHint &&
        // we do not show mark hint, when sort hint is shown
        g.showReorderHint && g.reorderHint) {
          text += text.length > 0 ? '<br>' : '';
          text += '- ' + g.reorderHint;
          text += text.length > 0 ? '<br>' : '';
          text += '- ' + g.markHint;
          text += text.length > 0 ? '<br>' : '';
          text += '- ' + g.copyHint;
        }
      }
      return text;
    },
    /**
     * Toggle column's visibility.
     * After calling this function and it returns true, afterToggleCol() must be called.
     *
     * @param {number} n
     *
     * @return {boolean} True if the column is toggled successfully.
     */
    toggleCol: function (n) {
      if (g.colVisib[n]) {
        // can hide if more than one column is visible
        if (g.visibleHeadersCount > 1) {
          $(g.t).find('tr').each(function () {
            $(this).find('th.draggable').eq(n).add($(this).find('td').eq(g.actionSpan + n)).hide();
          });
          g.colVisib[n] = 0;
          $(g.cList).find('.lDiv div').eq(n).find('input').prop('checked', false);
        } else {
          // cannot hide, force the checkbox to stay checked
          $(g.cList).find('.lDiv div').eq(n).find('input').prop('checked', true);
          return false;
        }
      } else {
        // column n is not visible
        $(g.t).find('tr').each(function () {
          $(this).find('th.draggable').eq(n).add($(this).find('td').eq(g.actionSpan + n)).show();
        });
        g.colVisib[n] = 1;
        $(g.cList).find('.lDiv div').eq(n).find('input').prop('checked', true);
      }
      return true;
    },
    /**
     * This must be called if toggleCol() returns is true.
     *
     * This function is separated from toggleCol because, sometimes, we want to toggle
     * some columns together at one time and do just one adjustment after it, e.g. in showAllColumns().
     */
    afterToggleCol: function () {
      // some adjustments after hiding column
      g.reposRsz();
      g.reposDrop();
      g.sendColPrefs();

      // check visible first row headers count
      g.visibleHeadersCount = $(g.t).find('tr').first().find('th.draggable:visible').length;
      g.refreshRestoreButton();

      // Display minimum of one column - disable checkbox for hiding last column
      if (g.visibleHeadersCount <= 1) {
        $(g.cList).find('.lDiv div').each(function () {
          $(this).find('input:checkbox:checked').prop('disabled', true);
        });
      } else {
        // Remove disabled property if showing more than one column
        $(g.cList).find('.lDiv div').each(function () {
          $(this).find('input:checkbox:disabled').prop('disabled', false);
        });
      }
    },
    /**
     * Show columns' visibility list.
     *
     * @param obj The drop down arrow of column visibility list
     */
    showColList: function (obj) {
      // only show when not resizing or reordering
      if (!g.colRsz && !g.colReorder) {
        var pos = $(obj).position();
        $(g.cList).css({
          top: pos.top + $(obj).outerHeight(true)
        }).show();
        $(obj).addClass('coldrop-hover');
      }
    },
    /**
     * Hide columns' visibility list.
     */
    hideColList: function () {
      $(g.cList).hide();
      $(g.cDrop).find('.coldrop-hover').removeClass('coldrop-hover');
    },
    /**
     * Reposition the column visibility drop-down arrow.
     */
    reposDrop: function () {
      var $th = $(t).find('th:not(.draggable)');
      for (var i = 0; i < $th.length; i++) {
        var $cd = $(g.cDrop).find('div').eq(i); // column drop-down arrow
        var pos = $($th[i]).position();
        $cd.css({
          left: pos.left + $($th[i]).width() - $cd.width(),
          top: pos.top
        });
      }
    },
    /**
     * Show all hidden columns.
     */
    showAllColumns: function () {
      for (var i = 0; i < g.colVisib.length; i++) {
        if (!g.colVisib[i]) {
          g.toggleCol(i);
        }
      }
      g.afterToggleCol();
    },
    /**
     * Show edit cell, if it can be shown
     *
     * @param cell <td> element to be edited
     */
    showEditCell: function (cell) {
      // destroy the date picker instance left if any, see: #17703
      var $datePickerInstance = $(g.cEdit).find('.hasDatepicker');
      if ($datePickerInstance.length > 0) {
        $datePickerInstance.datepicker('destroy');
      }
      if ($(cell).is('.grid_edit') && !g.colRsz && !g.colReorder) {
        if (!g.isCellEditActive) {
          var $cell = $(cell);
          if ('string' === $cell.attr('data-type') || 'blob' === $cell.attr('data-type') || 'json' === $cell.attr('data-type')) {
            g.cEdit = g.cEditTextarea;
          } else {
            g.cEdit = g.cEditStd;
          }

          // remove all edit area and hide it
          $(g.cEdit).find('.edit_area').empty().hide();
          // reposition the cEdit element
          $(g.cEdit).css({
            top: $cell.position().top,
            left: $cell.position().left
          }).show().find('.edit_box').css({
            width: $cell.outerWidth(),
            height: $cell.outerHeight()
          });
          // fill the cell edit with text from <td>
          var value = Functions.getCellValue(cell);
          if ($cell.attr('data-type') === 'json' && $cell.is('.truncated') === false) {
            value = Functions.stringifyJSON(value, null, 4);
          }
          $(g.cEdit).find('.edit_box').val(value);
          g.currentEditCell = cell;
          $(g.cEdit).find('.edit_box').trigger('focus');
          moveCursorToEnd($(g.cEdit).find('.edit_box'));
          $(g.cEdit).find('*').prop('disabled', false);
        }
      }
      function moveCursorToEnd(input) {
        var originalValue = input.val();
        var originallength = originalValue.length;
        input.val('');
        input.trigger('blur').trigger('focus').val(originalValue);
        input[0].setSelectionRange(originallength, originallength);
      }
    },
    /**
     * Remove edit cell and the edit area, if it is shown.
     *
     * @param force Optional, force to hide edit cell without saving edited field.
     * @param data  Optional, data from the POST AJAX request to save the edited field
     *              or just specify "true", if we want to replace the edited field with the new value.
     * @param field Optional, the edited <td>. If not specified, the function will
     *              use currently edited <td> from g.currentEditCell.
     * @param options Optional, this object contains a boolean named move (true, if called from move* functions)
     *                and a <td> to which the grid_edit should move
     */
    hideEditCell: function (force, data, field, options) {
      if (g.isCellEditActive && !force) {
        // cell is being edited, save or post the edited data
        if (options !== undefined) {
          g.saveOrPostEditedCell(options);
        } else {
          g.saveOrPostEditedCell();
        }
        return;
      }

      // cancel any previous request
      if (g.lastXHR !== null) {
        g.lastXHR.abort();
        g.lastXHR = null;
      }
      if (data) {
        if (g.currentEditCell) {
          // save value of currently edited cell
          // replace current edited field with the new value
          var $thisField = $(g.currentEditCell);
          var isNull = $thisField.data('value') === null;
          if (isNull) {
            $thisField.find('span').html('NULL');
            $thisField.addClass('null');
          } else {
            $thisField.removeClass('null');
            var value = data.isNeedToRecheck ? data.truncatableFieldValue : $thisField.data('value');

            // Truncates the text.
            $thisField.removeClass('truncated');
            if (CommonParams.get('pftext') === 'P' && value.length > g.maxTruncatedLen) {
              $thisField.addClass('truncated');
              value = value.substring(0, g.maxTruncatedLen) + '...';
            }

            // Add <br> before carriage return.
            var newHtml = Functions.escapeHtml(value);
            newHtml = newHtml.replace(/\n/g, '<br>\n');
            var decimals = parseInt($thisField.attr('data-decimals'));

            // remove decimal places if column type not supported
            if (decimals === 0 && $thisField.attr('data-type').indexOf('time') !== -1) {
              newHtml = newHtml.substring(0, newHtml.indexOf('.'));
            }

            // remove additional decimal places
            if (decimals > 0 && $thisField.attr('data-type').indexOf('time') !== -1) {
              newHtml = newHtml.substring(0, newHtml.length - (6 - decimals));
            }
            var selector = 'span';
            if ($thisField.hasClass('hex') && $thisField.find('a').length) {
              selector = 'a';
            }

            // Updates the code keeping highlighting (if any).
            var $target = $thisField.find(selector);
            if (!Functions.updateCode($target, newHtml, value)) {
              $target.html(newHtml);
            }
          }
          if ($thisField.is('.bit')) {
            $thisField.find('span').text($thisField.data('value'));
          }
        }
        if (data.transformations !== undefined) {
          $.each(data.transformations, function (cellIndex, value) {
            var $thisField = $(g.t).find('.to_be_saved').eq(cellIndex);
            $thisField.find('span').html(value);
          });
        }
        if (data.relations !== undefined) {
          $.each(data.relations, function (cellIndex, value) {
            var $thisField = $(g.t).find('.to_be_saved').eq(cellIndex);
            $thisField.find('span').html(value);
          });
        }

        // refresh the grid
        g.reposRsz();
        g.reposDrop();
      }

      // hide the cell editing area
      $(g.cEdit).hide();
      $(g.cEdit).find('.edit_box').trigger('blur');
      g.isCellEditActive = false;
      g.currentEditCell = null;
      // destroy datepicker in edit area, if exist
      var $dp = $(g.cEdit).find('.hasDatepicker');
      if ($dp.length > 0) {
        // eslint-disable-next-line no-underscore-dangle
        $(document).on('mousedown', $.datepicker._checkExternalClick);
        $dp.datepicker('refresh');

        // change the cursor in edit box back to normal
        // (the cursor become a hand pointer when we add datepicker)
        $(g.cEdit).find('.edit_box').css('cursor', 'inherit');
      }
    },
    /**
     * Show drop-down edit area when edit cell is focused.
     */
    showEditArea: function () {
      if (!g.isCellEditActive) {
        // make sure the edit area has not been shown
        g.isCellEditActive = true;
        g.isEditCellTextEditable = false;
        /**
         * @var $td current edited cell
         */
        var $td = $(g.currentEditCell);
        /**
         * @var $editArea the editing area
         */
        var $editArea = $(g.cEdit).find('.edit_area');
        /**
         * @var whereClause WHERE clause for the edited cell
         */
        var whereClause = $td.parent('tr').find('.where_clause').val();
        /**
         * @var fieldName  String containing the name of this field.
         * @see Sql.getFieldName()
         */
        var fieldName = Sql.getFieldName($(t), $td);
        /**
         * @var relationCurrValue String current value of the field (for fields that are foreign keyed).
         */
        var relationCurrValue = $td.text();
        /**
         * @var relationKeyOrDisplayColumn String relational key if in 'Relational display column' mode,
         * relational display column if in 'Relational key' mode (for fields that are foreign keyed).
         */
        var relationKeyOrDisplayColumn = $td.find('a').attr('title');
        /**
         * @var currValue String current value of the field (for fields that are of type enum or set).
         */
        var currValue = $td.find('span').text();

        // empty all edit area, then rebuild it based on $td classes
        $editArea.empty();

        // remember this instead of testing more than once
        var isNull = $td.is('.null');

        // add goto link, if this cell contains a link
        if ($td.find('a').length > 0) {
          var gotoLink = document.createElement('div');
          gotoLink.className = 'goto_link';
          $(gotoLink).append(g.gotoLinkText + ' ').append($td.find('a').clone());
          $editArea.append(gotoLink);
        }
        g.wasEditedCellNull = false;
        if ($td.is(':not(.not_null)')) {
          // append a null checkbox
          $editArea.append('<div class="null_div"><label>NULL:<input type="checkbox"></label></div>');
          var $checkbox = $editArea.find('.null_div input');
          // check if current <td> is NULL
          if (isNull) {
            $checkbox.prop('checked', true);
            g.wasEditedCellNull = true;
          }

          // if the select/editor is changed un-check the 'checkbox_null_<field_name>_<row_index>'.
          if ($td.is('.enum, .set')) {
            $editArea.on('change', 'select', function () {
              $checkbox.prop('checked', false);
            });
          } else if ($td.is('.relation')) {
            $editArea.on('change', 'select', function () {
              $checkbox.prop('checked', false);
            });
            $editArea.on('click', '.browse_foreign', function () {
              $checkbox.prop('checked', false);
            });
          } else {
            $(g.cEdit).on('keypress change paste', '.edit_box', function () {
              if ($(this).val() !== '') {
                $checkbox.prop('checked', false);
              }
            });
            // Capture ctrl+v (on IE and Chrome)
            $(g.cEdit).on('keydown', '.edit_box', function (e) {
              if (e.ctrlKey && e.which === 86) {
                $checkbox.prop('checked', false);
              }
            });
            $editArea.on('keydown', 'textarea', function () {
              $checkbox.prop('checked', false);
            });
          }
          // if some text is written in textbox automatically unmark the null checkbox and if it is emptied again mark the checkbox.
          $(g.cEdit).find('.edit_box').on('input', function () {
            if ($(g.cEdit).find('.edit_box').val() !== '') {
              $checkbox.prop('checked', false);
            } else {
              $checkbox.prop('checked', true);
            }
          });
          // if null checkbox is clicked empty the corresponding select/editor.
          $checkbox.on('click', function () {
            if ($td.is('.enum')) {
              $editArea.find('select').val('');
            } else if ($td.is('.set')) {
              $editArea.find('select').find('option').each(function () {
                var $option = $(this);
                $option.prop('selected', false);
              });
            } else if ($td.is('.relation')) {
              // if the dropdown is there to select the foreign value
              if ($editArea.find('select').length > 0) {
                $editArea.find('select').val('');
              }
            } else if ($td.is('.datefield')) {
              $('.ui-datepicker-trigger').trigger('click');
            } else {
              $editArea.find('textarea').val('');
            }
            $(g.cEdit).find('.edit_box').val('');
          });
        }

        // reset the position of the edit_area div after closing datetime picker
        $(g.cEdit).find('.edit_area').css({
          'top': '0',
          'position': ''
        });
        var postParams;
        if ($td.is('.relation')) {
          // handle relations
          $editArea.addClass('edit_area_loading');

          // initialize the original data
          $td.data('original_data', null);

          /**
           * @var postParams Object containing parameters for the POST request
           */
          postParams = {
            'ajax_request': true,
            'server': g.server,
            'db': g.db,
            'table': g.table,
            'column': fieldName,
            'curr_value': relationCurrValue,
            'relation_key_or_display_column': relationKeyOrDisplayColumn
          };
          g.lastXHR = $.post('index.php?route=/sql/get-relational-values', postParams, function (data) {
            g.lastXHR = null;
            $editArea.removeClass('edit_area_loading');
            if ($(data.dropdown).is('select')) {
              // save original_data
              var value = $(data.dropdown).val();
              $td.data('original_data', value);
              // update the text input field, in case where the "Relational display column" is checked
              $(g.cEdit).find('.edit_box').val(value);
            }
            $editArea.append(data.dropdown);
            $editArea.append('<div class="cell_edit_hint">' + g.cellEditHint + '</div>');

            // for 'Browse foreign values' options,
            // hide the value next to 'Browse foreign values' link
            $editArea.find('span.curr_value').hide();
            // handle update for new values selected from new window
            $editArea.find('span.curr_value').on('change', function () {
              $(g.cEdit).find('.edit_box').val($(this).text());
            });
          }); // end $.post()

          $editArea.show();
          $editArea.on('change', 'select', function () {
            $(g.cEdit).find('.edit_box').val($(this).val());
          });
          g.isEditCellTextEditable = true;
        } else if ($td.is('.enum')) {
          // handle enum fields
          $editArea.addClass('edit_area_loading');

          /**
           * @var postParams Object containing parameters for the POST request
           */
          postParams = {
            'ajax_request': true,
            'server': g.server,
            'db': g.db,
            'table': g.table,
            'column': fieldName,
            'curr_value': currValue
          };
          g.lastXHR = $.post('index.php?route=/sql/get-enum-values', postParams, function (data) {
            g.lastXHR = null;
            if (typeof data === 'object' && data.success === false) {
              Functions.ajaxShowMessage(data.error, undefined, 'error');
              return;
            }
            $editArea.removeClass('edit_area_loading');
            $editArea.append(data.dropdown);
            $editArea.append('<div class="cell_edit_hint">' + g.cellEditHint + '</div>');
          }); // end $.post()

          $editArea.show();
          $editArea.on('change', 'select', function () {
            $(g.cEdit).find('.edit_box').val($(this).val());
          });
        } else if ($td.is('.set')) {
          // handle set fields
          $editArea.addClass('edit_area_loading');

          // if the data is truncated, get the full data
          if ($td.is('.truncated')) {
            postParams = {
              'ajax_request': true,
              'server': g.server,
              'db': g.db,
              'table': g.table,
              'column': fieldName,
              'curr_value': currValue,
              'get_full_values': true,
              'where_clause': whereClause
            };
          } else {
            postParams = {
              'ajax_request': true,
              'server': g.server,
              'db': g.db,
              'table': g.table,
              'column': fieldName,
              'curr_value': currValue
            };
          }
          g.lastXHR = $.post('index.php?route=/sql/get-set-values', postParams, function (data) {
            g.lastXHR = null;
            if (typeof data === 'object' && data.success === false) {
              Functions.ajaxShowMessage(data.error, undefined, 'error');
              return;
            }
            $editArea.removeClass('edit_area_loading');
            $editArea.append(data.select);
            $td.data('original_data', $(data.select).val().join());
            $editArea.append('<div class="cell_edit_hint">' + g.cellEditHint + '</div>');
          }); // end $.post()

          $editArea.show();
          $editArea.on('change', 'select', function () {
            $(g.cEdit).find('.edit_box').val($(this).val());
          });
        } else if ($td.is('.truncated, .transformed')) {
          if ($td.is('.to_be_saved')) {
            // cell has been edited
            var value = $td.data('value');
            $(g.cEdit).find('.edit_box').val(value);
            $editArea.append('<textarea></textarea>');
            $editArea.find('textarea').val(value);
            $editArea.on('keyup', 'textarea', function () {
              $(g.cEdit).find('.edit_box').val($(this).val());
            });
            $(g.cEdit).on('keyup', '.edit_box', function () {
              $editArea.find('textarea').val($(this).val());
            });
            $editArea.append('<div class="cell_edit_hint">' + g.cellEditHint + '</div>');
          } else {
            // handle truncated/transformed values values
            $editArea.addClass('edit_area_loading');

            // initialize the original data
            $td.data('original_data', null);

            /**
             * @var sqlQuery   String containing the SQL query used to retrieve value of truncated/transformed data
             */
            var sqlQuery = 'SELECT `' + fieldName + '` FROM `' + g.table + '` WHERE ' + whereClause;

            // Make the Ajax call and get the data, wrap it and insert it
            g.lastXHR = $.post('index.php?route=/sql', {
              'server': g.server,
              'db': g.db,
              'ajax_request': true,
              'sql_query': sqlQuery,
              'grid_edit': true
            }, function (data) {
              g.lastXHR = null;
              $editArea.removeClass('edit_area_loading');
              if (typeof data !== 'undefined' && data.success === true) {
                if ($td.attr('data-type') === 'json') {
                  data.value = Functions.stringifyJSON(data.value, null, 4);
                }
                $td.data('original_data', data.value);
                $(g.cEdit).find('.edit_box').val(data.value);
              } else {
                Functions.ajaxShowMessage(data.error, false);
              }
            }); // end $.post()
          }
          g.isEditCellTextEditable = true;
        } else if ($td.is('.timefield, .datefield, .datetimefield, .timestampfield')) {
          var $inputField = $(g.cEdit).find('.edit_box');

          // remember current datetime value in $input_field, if it is not null
          var datetimeValue = !isNull ? $inputField.val() : '';
          var showMillisec = false;
          var showMicrosec = false;
          var timeFormat = 'HH:mm:ss';
          // check for decimal places of seconds
          if ($td.attr('data-decimals') > 0 && $td.attr('data-type').indexOf('time') !== -1) {
            if (datetimeValue && datetimeValue.indexOf('.') === false) {
              datetimeValue += '.';
            }
            if ($td.attr('data-decimals') > 3) {
              showMillisec = true;
              showMicrosec = true;
              timeFormat = 'HH:mm:ss.lc';
              if (datetimeValue) {
                datetimeValue += '000000';
                datetimeValue = datetimeValue.substring(0, datetimeValue.indexOf('.') + 7);
                $inputField.val(datetimeValue);
              }
            } else {
              showMillisec = true;
              timeFormat = 'HH:mm:ss.l';
              if (datetimeValue) {
                datetimeValue += '000';
                datetimeValue = datetimeValue.substring(0, datetimeValue.indexOf('.') + 4);
                $inputField.val(datetimeValue);
              }
            }
          }

          // add datetime picker
          Functions.addDatepicker($inputField, $td.attr('data-type'), {
            showMillisec: showMillisec,
            showMicrosec: showMicrosec,
            timeFormat: timeFormat,
            firstDay: firstDayOfCalendar
          });
          $inputField.on('keyup', function (e) {
            if (e.which === 13) {
              // post on pressing "Enter"
              e.preventDefault();
              e.stopPropagation();
              g.saveOrPostEditedCell();
            } else if (e.which !== 27) {
              Functions.toggleDatepickerIfInvalid($td, $inputField);
            }
          });
          $inputField.datepicker('show');
          Functions.toggleDatepickerIfInvalid($td, $inputField);

          // unbind the mousedown event to prevent the problem of
          // datepicker getting closed, needs to be checked for any
          // change in names when updating
          // eslint-disable-next-line no-underscore-dangle
          $(document).off('mousedown', $.datepicker._checkExternalClick);

          // move ui-datepicker-div inside cEdit div
          var datepickerDiv = $('#ui-datepicker-div');
          datepickerDiv.css({
            'top': 0,
            'left': 0,
            'position': 'relative'
          });
          $(g.cEdit).append(datepickerDiv);

          // cancel any click on the datepicker element
          $editArea.find('> *').on('click', function (e) {
            e.stopPropagation();
          });
          g.isEditCellTextEditable = true;
        } else {
          g.isEditCellTextEditable = true;
          // only append edit area hint if there is a null checkbox
          if ($editArea.children().length > 0) {
            $editArea.append('<div class="cell_edit_hint">' + g.cellEditHint + '</div>');
          }
        }
        if ($editArea.children().length > 0) {
          $editArea.show();
        }
      }
    },
    /**
     * Post the content of edited cell.
     *
     * @param options Optional, this object contains a boolean named move (true, if called from move* functions)
     *                and a <td> to which the grid_edit should move
     */
    postEditedCell: function (options) {
      if (g.isSaving) {
        return;
      }
      g.isSaving = true;
      /**
       * @var relationFields Array containing the name/value pairs of relational fields
       */
      var relationFields = {};
      /**
       * @var relationalDisplay string 'K' if relational key, 'D' if relational display column
       */
      var relationalDisplay = $(g.o).find('input[name=relational_display]:checked').val();
      /**
       * @var transformFields    Array containing the name/value pairs for transformed fields
       */
      var transformFields = {};
      /**
       * @var transformationFields   Boolean, if there are any transformed fields in the edited cells
       */
      var transformationFields = false;
      /**
       * @var fullSqlQuery String containing the complete SQL query to update this table
       */
      var fullSqlQuery = '';
      /**
       * @var relFieldsList  String, url encoded representation of {@link relations_fields}
       */
      var relFieldsList = '';
      /**
       * @var transformFieldsList  String, url encoded representation of {@link transformFields}
       */
      var transformFieldsList = '';
      /**
       * @var fullWhereClause Array containing where clause for updated fields
       */
      var fullWhereClause = [];
      /**
       * @var isUnique   Boolean, whether the rows in this table is unique or not
       */
      var isUnique = $(g.t).find('td.edit_row_anchor').is('.nonunique') ? 0 : 1;
      /**
       * multi edit variables
       */
      var multiEditFieldsName = [];
      var multiEditFieldsType = [];
      var multiEditFields = [];
      var multiEditFieldsNull = [];

      // alert user if edited table is not unique
      if (!isUnique) {
        alert(g.alertNonUnique);
      }

      // loop each edited row
      $(g.t).find('td.to_be_saved').parents('tr').each(function () {
        var $tr = $(this);
        var whereClause = $tr.find('.where_clause').val();
        if (typeof whereClause === 'undefined') {
          whereClause = '';
        }
        fullWhereClause.push(whereClause);
        var conditionArrayContent = $tr.find('.condition_array').val();
        if (typeof conditionArrayContent === 'undefined') {
          conditionArrayContent = '{}';
        }
        var conditionArray = JSON.parse(conditionArrayContent);

        /**
         * multi edit variables, for current row
         * @TODO array indices are still not correct, they should be md5 of field's name
         */
        var fieldsName = [];
        var fieldsType = [];
        var fields = [];
        var fieldsNull = [];

        // loop each edited cell in a row
        $tr.find('.to_be_saved').each(function () {
          /**
           * @var $thisField    Object referring to the td that is being edited
           */
          var $thisField = $(this);

          /**
           * @var fieldName  String containing the name of this field.
           * @see Sql.getFieldName()
           */
          var fieldName = Sql.getFieldName($(g.t), $thisField);

          /**
           * @var thisFieldParams   Array temporary storage for the name/value of current field
           */
          var thisFieldParams = {};
          if ($thisField.is('.transformed')) {
            transformationFields = true;
          }
          thisFieldParams[fieldName] = $thisField.data('value');

          /**
           * @var isNull String capturing whether 'checkbox_null_<field_name>_<row_index>' is checked.
           */
          var isNull = thisFieldParams[fieldName] === null;
          fieldsName.push(fieldName);
          if (isNull) {
            fieldsNull.push('on');
            fields.push('');
          } else {
            if ($thisField.is('.bit')) {
              fieldsType.push('bit');
            } else if ($thisField.hasClass('hex')) {
              fieldsType.push('hex');
            }
            fieldsNull.push('');
            if ($thisField.attr('data-type') !== 'json') {
              fields.push($thisField.data('value'));
            } else {
              const JSONString = Functions.stringifyJSON($thisField.data('value'));
              fields.push(JSONString);
            }
            var cellIndex = $thisField.index('.to_be_saved');
            if ($thisField.is(':not(.relation, .enum, .set, .bit)')) {
              if ($thisField.is('.transformed')) {
                transformFields[cellIndex] = {};
                $.extend(transformFields[cellIndex], thisFieldParams);
              }
            } else if ($thisField.is('.relation')) {
              relationFields[cellIndex] = {};
              $.extend(relationFields[cellIndex], thisFieldParams);
            }
          }
          // check if edited field appears in WHERE clause
          if (whereClause.indexOf(Sql.urlEncode(fieldName)) > -1) {
            var fieldStr = '`' + g.table + '`.' + '`' + fieldName + '`';
            for (var field in conditionArray) {
              if (field.indexOf(fieldStr) > -1) {
                conditionArray[field] = isNull ? 'IS NULL' : '= \'' + thisFieldParams[fieldName].replace(/'/g, '\'\'') + '\'';
                break;
              }
            }
          }
        }); // end of loop for every edited cells in a row

        // save new_clause
        var newClause = '';
        for (var field in conditionArray) {
          newClause += field + ' ' + conditionArray[field] + ' AND ';
        }
        newClause = newClause.substring(0, newClause.length - 5); // remove the last AND
        $tr.data('new_clause', newClause);
        // save condition_array
        $tr.find('.condition_array').val(JSON.stringify(conditionArray));
        multiEditFieldsName.push(fieldsName);
        multiEditFieldsType.push(fieldsType);
        multiEditFields.push(fields);
        multiEditFieldsNull.push(fieldsNull);
      }); // end of loop for every edited rows

      relFieldsList = $.param(relationFields);
      transformFieldsList = $.param(transformFields);

      // Make the Ajax post after setting all parameters
      /**
       * @var postParams Object containing parameters for the POST request
       */
      var postParams = {
        'ajax_request': true,
        'sql_query': fullSqlQuery,
        'server': g.server,
        'db': g.db,
        'table': g.table,
        'clause_is_unique': isUnique,
        'where_clause': fullWhereClause,
        'fields[multi_edit]': multiEditFields,
        'fields_name[multi_edit]': multiEditFieldsName,
        'fields_type[multi_edit]': multiEditFieldsType,
        'fields_null[multi_edit]': multiEditFieldsNull,
        'rel_fields_list': relFieldsList,
        'do_transformations': transformationFields,
        'transform_fields_list': transformFieldsList,
        'relational_display': relationalDisplay,
        'goto': encodeURIComponent('index.php?route=/sql'),
        'submit_type': 'save'
      };
      if (!g.saveCellsAtOnce) {
        $(g.cEdit).find('*').prop('disabled', true);
        $(g.cEdit).find('.edit_box').addClass('edit_box_posting');
      } else {
        $(g.o).find('div.save_edited').addClass('saving_edited_data').find('input').prop('disabled', true); // disable the save button
      }
      $.ajax({
        type: 'POST',
        url: 'index.php?route=/table/replace',
        data: postParams,
        success: function (data) {
          g.isSaving = false;
          if (!g.saveCellsAtOnce) {
            $(g.cEdit).find('*').prop('disabled', false);
            $(g.cEdit).find('.edit_box').removeClass('edit_box_posting');
          } else {
            $(g.o).find('div.save_edited').removeClass('saving_edited_data').find('input').prop('disabled', false); // enable the save button back
          }
          if (typeof data !== 'undefined' && data.success === true) {
            if (typeof options === 'undefined' || !options.move) {
              Functions.ajaxShowMessage(data.message);
            }

            // update where_clause related data in each edited row
            $(g.t).find('td.to_be_saved').parents('tr').each(function () {
              var newClause = $(this).data('new_clause');
              var $whereClause = $(this).find('.where_clause');
              var oldClause = $whereClause.val();
              var decodedOldClause = oldClause;
              var decodedNewClause = newClause;
              $whereClause.val(newClause);
              // update Edit, Copy, and Delete links also
              $(this).find('a').each(function () {
                $(this).attr('href', $(this).attr('href').replace(oldClause, newClause));
                // update delete confirmation in Delete link
                if ($(this).attr('href').indexOf('DELETE') > -1) {
                  $(this).removeAttr('onclick').off('click').on('click', function () {
                    return Functions.confirmLink(this, 'DELETE FROM `' + g.db + '`.`' + g.table + '` WHERE ' + decodedNewClause + (isUnique ? '' : ' LIMIT 1'));
                  });
                }
              });
              // update the multi edit checkboxes
              $(this).find('input[type=checkbox]').each(function () {
                var $checkbox = $(this);
                var checkboxName = $checkbox.attr('name');
                var checkboxValue = $checkbox.val();
                $checkbox.attr('name', checkboxName.replace(oldClause, newClause));
                $checkbox.val(checkboxValue.replace(decodedOldClause, decodedNewClause));
              });
            });
            // update the display of executed SQL query command
            if (typeof data.sql_query !== 'undefined') {
              // extract query box
              var $resultQuery = $($.parseHTML(data.sql_query));
              var sqlOuter = $resultQuery.find('.sqlOuter').wrap('<p>').parent().html();
              var tools = $resultQuery.find('.tools').wrap('<p>').parent().html();
              // sqlOuter and tools will not be present if 'Show SQL queries' configuration is off
              if (typeof sqlOuter !== 'undefined' && typeof tools !== 'undefined') {
                $(g.o).find('.result_query').not($(g.o).find('.result_query').last()).remove();
                var $existingQuery = $(g.o).find('.result_query');
                // If two query box exists update query in second else add a second box
                if ($existingQuery.find('div.sqlOuter').length > 1) {
                  $existingQuery.children().eq(3).remove();
                  $existingQuery.children().eq(3).remove();
                  $existingQuery.append(sqlOuter + tools);
                } else {
                  $existingQuery.append(sqlOuter + tools);
                }
                Functions.highlightSql($existingQuery);
              }
            }
            // hide and/or update the successfully saved cells
            g.hideEditCell(true, data);

            // remove the "Save edited cells" button
            $(g.o).find('div.save_edited').hide();
            // update saved fields
            $(g.t).find('.to_be_saved').removeClass('to_be_saved').data('value', null).data('original_data', null);
            g.isCellEdited = false;
          } else {
            Functions.ajaxShowMessage(data.error, false);
            if (!g.saveCellsAtOnce) {
              $(g.t).find('.to_be_saved').removeClass('to_be_saved');
            }
          }
        }
      }).done(function () {
        if (options !== undefined && options.move) {
          g.showEditCell(options.cell);
        }
      }); // end $.ajax()
    },
    /**
     * Save edited cell, so it can be posted later.
     *
     * @return {bool}
     */
    saveEditedCell: function () {
      /**
       * @var $thisField    Object referring to the td that is being edited
       */
      var $thisField = $(g.currentEditCell);
      var $testElement = ''; // to test the presence of a element

      var needToPost = false;

      /**
       * @var fieldName  String containing the name of this field.
       * @see Sql.getFieldName()
       */
      var fieldName = Sql.getFieldName($(g.t), $thisField);

      /**
       * @var thisFieldParams   Array temporary storage for the name/value of current field
       */
      var thisFieldParams = {};

      /**
       * @var isNull String capturing whether 'checkbox_null_<field_name>_<row_index>' is checked.
       */
      var isNull = $(g.cEdit).find('input:checkbox').is(':checked');
      if ($(g.cEdit).find('.edit_area').is('.edit_area_loading')) {
        // the edit area is still loading (retrieving cell data), no need to post
        needToPost = false;
      } else if (isNull) {
        if (!g.wasEditedCellNull) {
          thisFieldParams[fieldName] = null;
          needToPost = true;
        }
      } else {
        if ($thisField.is('.bit')) {
          thisFieldParams[fieldName] = $(g.cEdit).find('.edit_box').val();
        } else if ($thisField.is('.set')) {
          $testElement = $(g.cEdit).find('select');
          thisFieldParams[fieldName] = $testElement.map(function () {
            return $(this).val();
          }).get().join(',');
        } else if ($thisField.is('.relation, .enum')) {
          // for relation and enumeration, take the results from edit box value,
          // because selected value from drop-down, new window or multiple
          // selection list will always be updated to the edit box
          thisFieldParams[fieldName] = $(g.cEdit).find('.edit_box').val();
        } else if ($thisField.hasClass('hex')) {
          if ($(g.cEdit).find('.edit_box').val().match(/^(0x)?[a-f0-9]*$/i) !== null) {
            thisFieldParams[fieldName] = $(g.cEdit).find('.edit_box').val();
          } else {
            var hexError = '<div class="alert alert-danger" role="alert">' + Messages.strEnterValidHex + '</div>';
            Functions.ajaxShowMessage(hexError, false);
            thisFieldParams[fieldName] = Functions.getCellValue(g.currentEditCell);
          }
        } else {
          thisFieldParams[fieldName] = $(g.cEdit).find('.edit_box').val();
        }
        let isValueUpdated;
        if ($thisField.attr('data-type') !== 'json') {
          isValueUpdated = thisFieldParams[fieldName] !== Functions.getCellValue(g.currentEditCell);
        } else {
          const JSONString = Functions.stringifyJSON(thisFieldParams[fieldName]);
          isValueUpdated = JSONString !== Functions.stringifyJSON(Functions.getCellValue(g.currentEditCell));
        }
        if (g.wasEditedCellNull || isValueUpdated) {
          needToPost = true;
        }
      }
      if (needToPost) {
        $(g.currentEditCell).addClass('to_be_saved').data('value', thisFieldParams[fieldName]);
        if (g.saveCellsAtOnce) {
          $(g.o).find('div.save_edited').show();
        }
        g.isCellEdited = true;
      }
      return needToPost;
    },
    /**
     * Save or post currently edited cell, depending on the "saveCellsAtOnce" configuration.
     *
     * @param options Optional, this object contains a boolean named move (true, if called from move* functions)
     *                and a <td> to which the grid_edit should move
     */
    saveOrPostEditedCell: function (options) {
      var saved = g.saveEditedCell();
      // Check if $cfg['SaveCellsAtOnce'] is false
      if (!g.saveCellsAtOnce) {
        // Check if need_to_post is true
        if (saved) {
          // Check if this function called from 'move' functions
          if (options !== undefined && options.move) {
            g.postEditedCell(options);
          } else {
            g.postEditedCell();
          }
          // need_to_post is false
        } else {
          // Check if this function called from 'move' functions
          if (options !== undefined && options.move) {
            g.hideEditCell(true);
            g.showEditCell(options.cell);
            // NOT called from 'move' functions
          } else {
            g.hideEditCell(true);
          }
        }
        // $cfg['SaveCellsAtOnce'] is true
      } else {
        // If need_to_post
        if (saved) {
          // If this function called from 'move' functions
          if (options !== undefined && options.move) {
            g.hideEditCell(true, true, false, options);
            g.showEditCell(options.cell);
            // NOT called from 'move' functions
          } else {
            g.hideEditCell(true, true);
          }
        } else {
          // If this function called from 'move' functions
          if (options !== undefined && options.move) {
            g.hideEditCell(true, false, false, options);
            g.showEditCell(options.cell);
            // NOT called from 'move' functions
          } else {
            g.hideEditCell(true);
          }
        }
      }
    },
    /**
     * Initialize column resize feature.
     */
    initColResize: function () {
      // create column resizer div
      g.cRsz = document.createElement('div');
      g.cRsz.className = 'cRsz';

      // get data columns in the first row of the table
      var $firstRowCols = $(g.t).find('tr').first().find('th.draggable');

      // create column borders
      $firstRowCols.each(function () {
        var cb = document.createElement('div'); // column border
        $(cb).addClass('colborder').on('mousedown', function (e) {
          g.dragStartRsz(e, this);
        });
        $(g.cRsz).append(cb);
      });
      g.reposRsz();

      // attach to global div
      $(g.gDiv).prepend(g.cRsz);
    },
    /**
     * Initialize column reordering feature.
     */
    initColReorder: function () {
      g.cCpy = document.createElement('div'); // column copy, to store copy of dragged column header
      g.cPointer = document.createElement('div'); // column pointer, used when reordering column

      // adjust g.cCpy
      g.cCpy.className = 'cCpy';
      $(g.cCpy).hide();

      // adjust g.cPointer
      g.cPointer.className = 'cPointer';
      $(g.cPointer).css('visibility', 'hidden'); // set visibility to hidden instead of calling hide() to force browsers to cache the image in cPointer class

      // assign column reordering hint
      g.reorderHint = Messages.strColOrderHint;

      // get data columns in the first row of the table
      var $firstRowCols = $(g.t).find('tr').first().find('th.draggable');

      // initialize column order
      var $colOrder = $(g.o).find('.col_order'); // check if column order is passed from PHP
      var i;
      if ($colOrder.length > 0) {
        g.colOrder = $colOrder.val().split(',');
        for (i = 0; i < g.colOrder.length; i++) {
          g.colOrder[i] = parseInt(g.colOrder[i], 10);
        }
      } else {
        g.colOrder = [];
        for (i = 0; i < $firstRowCols.length; i++) {
          g.colOrder.push(i);
        }
      }

      // register events
      $(g.t).find('th.draggable').on('mousedown', function (e) {
        $(g.o).addClass('turnOffSelect');
        if (g.visibleHeadersCount > 1) {
          g.dragStartReorder(e, this);
        }
      }).on('mouseenter', function () {
        if (g.visibleHeadersCount > 1) {
          $(this).css('cursor', 'move');
        } else {
          $(this).css('cursor', 'inherit');
        }
      }).on('mouseleave', function () {
        g.showReorderHint = false;
        $(this).uiTooltip('option', {
          content: g.updateHint()
        });
      }).on('dblclick', function (e) {
        e.preventDefault();
        var res = Functions.copyToClipboard($(this).data('column'));
        if (res) {
          Functions.ajaxShowMessage(Messages.strCopyColumnSuccess, false, 'success');
        } else {
          Functions.ajaxShowMessage(Messages.strCopyColumnFailure, false, 'error');
        }
      });
      $(g.t).find('th.draggable a').on('dblclick', function (e) {
        e.stopPropagation();
      });
      // restore column order when the restore button is clicked
      $(g.o).find('div.restore_column').on('click', function () {
        g.restoreColOrder();
      });

      // attach to global div
      $(g.gDiv).append(g.cPointer);
      $(g.gDiv).append(g.cCpy);

      // prevent default "dragstart" event when dragging a link
      $(g.t).find('th a').on('dragstart', function () {
        return false;
      });

      // refresh the restore column button state
      g.refreshRestoreButton();
    },
    /**
     * Initialize column visibility feature.
     */
    initColVisib: function () {
      g.cDrop = document.createElement('div'); // column drop-down arrows
      g.cList = document.createElement('div'); // column visibility list

      // adjust g.cDrop
      g.cDrop.className = 'cDrop';

      // adjust g.cList
      g.cList.className = 'cList';
      $(g.cList).hide();

      // assign column visibility related hints
      g.showAllColText = Messages.strShowAllCol;

      // get data columns in the first row of the table
      var $firstRowCols = $(g.t).find('tr').first().find('th.draggable');
      var i;
      // initialize column visibility
      var $colVisib = $(g.o).find('.col_visib'); // check if column visibility is passed from PHP
      if ($colVisib.length > 0) {
        g.colVisib = $colVisib.val().split(',');
        for (i = 0; i < g.colVisib.length; i++) {
          g.colVisib[i] = parseInt(g.colVisib[i], 10);
        }
      } else {
        g.colVisib = [];
        for (i = 0; i < $firstRowCols.length; i++) {
          g.colVisib.push(1);
        }
      }

      // make sure we have more than one column
      if ($firstRowCols.length > 1) {
        var $colVisibTh = $(g.t).find('th:not(.draggable)').slice(0, 1);
        Functions.tooltip($colVisibTh, 'th', Messages.strColVisibHint);

        // create column visibility drop-down arrow(s)
        $colVisibTh.each(function () {
          var cd = document.createElement('div'); // column drop-down arrow
          $(cd).addClass('coldrop').on('click', function () {
            if (g.cList.style.display === 'none') {
              g.showColList(this);
            } else {
              g.hideColList();
            }
          });
          $(g.cDrop).append(cd);
        });

        // add column visibility control
        g.cList.innerHTML = '<div class="lDiv"></div>';
        var $listDiv = $(g.cList).find('div');
        var tempClick = function () {
          if (g.toggleCol($(this).index())) {
            g.afterToggleCol();
          }
        };
        for (i = 0; i < $firstRowCols.length; i++) {
          var currHeader = $firstRowCols[i];
          var listElmt = document.createElement('div');
          $(listElmt).text($(currHeader).text()).prepend('<input type="checkbox" ' + (g.colVisib[i] ? 'checked="checked" ' : '') + '>');
          $listDiv.append(listElmt);
          // add event on click
          $(listElmt).on('click', tempClick);
        }
        // add "show all column" button
        var showAll = document.createElement('div');
        $(showAll).addClass('showAllColBtn').text(g.showAllColText);
        $(g.cList).append(showAll);
        $(showAll).on('click', function () {
          g.showAllColumns();
        });
        // prepend "show all column" button at top if the list is too long
        if ($firstRowCols.length > 10) {
          var clone = showAll.cloneNode(true);
          $(g.cList).prepend(clone);
          $(clone).on('click', function () {
            g.showAllColumns();
          });
        }
      }

      // hide column visibility list if we move outside the list
      $(g.t).find('td, th.draggable').on('mouseenter', function () {
        g.hideColList();
      });

      // attach to first row first col of the grid
      var thFirst = $(g.t).find('th.d-print-none');
      $(thFirst).append(g.cDrop);
      $(thFirst).append(g.cList);

      // some adjustment
      g.reposDrop();
    },
    /**
     * Move currently Editing Cell to Up
     *
     * @param e
     *
     */
    moveUp: function (e) {
      e.preventDefault();
      var $thisField = $(g.currentEditCell);
      var fieldName = Sql.getFieldName($(g.t), $thisField);
      var whereClause = $thisField.parents('tr').first().find('.where_clause').val();
      if (typeof whereClause === 'undefined') {
        whereClause = '';
      }
      var found = false;
      var $prevRow;
      $thisField.parents('tr').first().parents('tbody').children().each(function () {
        if ($(this).find('.where_clause').val() === whereClause) {
          found = true;
        }
        if (!found) {
          $prevRow = $(this);
        }
      });
      var newCell;
      if (found && $prevRow) {
        $prevRow.children('td').each(function () {
          if (Sql.getFieldName($(g.t), $(this)) === fieldName) {
            newCell = this;
          }
        });
      }
      if (newCell) {
        g.hideEditCell(false, false, false, {
          move: true,
          cell: newCell
        });
      }
    },
    /**
     * Move currently Editing Cell to Down
     *
     * @param e
     *
     */
    moveDown: function (e) {
      e.preventDefault();
      var $thisField = $(g.currentEditCell);
      var fieldName = Sql.getFieldName($(g.t), $thisField);
      var whereClause = $thisField.parents('tr').first().find('.where_clause').val();
      if (typeof whereClause === 'undefined') {
        whereClause = '';
      }
      var found = false;
      var $nextRow;
      var j = 0;
      var nextRowFound = false;
      $thisField.parents('tr').first().parents('tbody').children().each(function () {
        if ($(this).find('.where_clause').val() === whereClause) {
          found = true;
        }
        if (found) {
          if (j >= 1 && !nextRowFound) {
            $nextRow = $(this);
            nextRowFound = true;
          } else {
            j++;
          }
        }
      });
      var newCell;
      if (found && $nextRow) {
        $nextRow.children('td').each(function () {
          if (Sql.getFieldName($(g.t), $(this)) === fieldName) {
            newCell = this;
          }
        });
      }
      if (newCell) {
        g.hideEditCell(false, false, false, {
          move: true,
          cell: newCell
        });
      }
    },
    /**
     * Move currently Editing Cell to Left
     *
     * @param e
     *
     */
    moveLeft: function (e) {
      e.preventDefault();
      var $thisField = $(g.currentEditCell);
      var fieldName = Sql.getFieldName($(g.t), $thisField);
      var whereClause = $thisField.parents('tr').first().find('.where_clause').val();
      if (typeof whereClause === 'undefined') {
        whereClause = '';
      }
      var found = false;
      var $foundRow;
      $thisField.parents('tr').first().parents('tbody').children().each(function () {
        if ($(this).find('.where_clause').val() === whereClause) {
          found = true;
          $foundRow = $(this);
        }
      });
      var leftCell;
      var cellFound = false;
      if (found) {
        $foundRow.children('td.grid_edit').each(function () {
          if (Sql.getFieldName($(g.t), $(this)) === fieldName) {
            cellFound = true;
          }
          if (!cellFound) {
            leftCell = this;
          }
        });
      }
      if (leftCell) {
        g.hideEditCell(false, false, false, {
          move: true,
          cell: leftCell
        });
      }
    },
    /**
     * Move currently Editing Cell to Right
     *
     * @param e
     *
     */
    moveRight: function (e) {
      e.preventDefault();
      var $thisField = $(g.currentEditCell);
      var fieldName = Sql.getFieldName($(g.t), $thisField);
      var whereClause = $thisField.parents('tr').first().find('.where_clause').val();
      if (typeof whereClause === 'undefined') {
        whereClause = '';
      }
      var found = false;
      var $foundRow;
      var j = 0;
      $thisField.parents('tr').first().parents('tbody').children().each(function () {
        if ($(this).find('.where_clause').val() === whereClause) {
          found = true;
          $foundRow = $(this);
        }
      });
      var rightCell;
      var cellFound = false;
      var nextCellFound = false;
      if (found) {
        $foundRow.children('td.grid_edit').each(function () {
          if (Sql.getFieldName($(g.t), $(this)) === fieldName) {
            cellFound = true;
          }
          if (cellFound) {
            if (j >= 1 && !nextCellFound) {
              rightCell = this;
              nextCellFound = true;
            } else {
              j++;
            }
          }
        });
      }
      if (rightCell) {
        g.hideEditCell(false, false, false, {
          move: true,
          cell: rightCell
        });
      }
    },
    /**
     * Initialize grid editing feature.
     */
    initGridEdit: function () {
      function startGridEditing(e, cell) {
        if (g.isCellEditActive) {
          g.saveOrPostEditedCell();
        } else {
          g.showEditCell(cell);
        }
        e.stopPropagation();
      }
      function handleCtrlNavigation(e) {
        if (e.ctrlKey && e.which === 38 || e.altKey && e.which === 38) {
          g.moveUp(e);
        } else if (e.ctrlKey && e.which === 40 || e.altKey && e.which === 40) {
          g.moveDown(e);
        } else if (e.ctrlKey && e.which === 37 || e.altKey && e.which === 37) {
          g.moveLeft(e);
        } else if (e.ctrlKey && e.which === 39 || e.altKey && e.which === 39) {
          g.moveRight(e);
        }
      }

      // create cell edit wrapper element
      g.cEditStd = document.createElement('div');
      g.cEdit = g.cEditStd;
      g.cEditTextarea = document.createElement('div');

      // adjust g.cEditStd
      g.cEditStd.className = 'cEdit';
      $(g.cEditStd).html('<input class="edit_box" rows="1"><div class="edit_area"></div>');
      $(g.cEditStd).hide();

      // adjust g.cEdit
      g.cEditTextarea.className = 'cEdit';
      $(g.cEditTextarea).html('<textarea class="edit_box" rows="1"></textarea><div class="edit_area"></div>');
      $(g.cEditTextarea).hide();

      // assign cell editing hint
      g.cellEditHint = Messages.strCellEditHint;
      g.saveCellWarning = Messages.strSaveCellWarning;
      g.alertNonUnique = Messages.strAlertNonUnique;
      g.gotoLinkText = Messages.strGoToLink;

      // initialize cell editing configuration
      g.saveCellsAtOnce = $(g.o).find('.save_cells_at_once').val();
      g.maxTruncatedLen = CommonParams.get('LimitChars');

      // register events
      $(g.t).find('td.data.click1').on('click', function (e) {
        startGridEditing(e, this);
        // prevent default action when clicking on "link" in a table
        if ($(e.target).is('.grid_edit a')) {
          e.preventDefault();
        }
      });
      $(g.t).on('click', 'td.data.click2', function (e) {
        var $cell = $(this);
        // In the case of relational link, We want single click on the link
        // to goto the link and double click to start grid-editing.
        var $link = $(e.target);
        if ($link.is('.grid_edit.relation a')) {
          e.preventDefault();
          // get the click count and increase
          var clicks = $cell.data('clicks');
          clicks = typeof clicks === 'undefined' ? 1 : clicks + 1;
          if (clicks === 1) {
            // if there are no previous clicks,
            // start the single click timer
            var timer = setTimeout(function () {
              // temporarily remove ajax class so the page loader will not handle it,
              // submit and then add it back
              $link.removeClass('ajax');
              AJAX.requestHandler.call($link[0]);
              $link.addClass('ajax');
              $cell.data('clicks', 0);
            }, 700);
            $cell.data('clicks', clicks);
            $cell.data('timer', timer);
          } else {
            // When double clicking a link, switch to edit mode
            // this is a double click, cancel the single click timer
            // and make the click count 0
            clearTimeout($cell.data('timer'));
            $cell.data('clicks', 0);
            // start grid-editing
            startGridEditing(e, this);
          }
        }
      }).on('dblclick', 'td.data.click2', function (e) {
        if ($(e.target).is('.grid_edit a')) {
          e.preventDefault();
        } else {
          startGridEditing(e, this);
        }
      });
      $(g.cEditStd).on('keydown', 'input.edit_box, select', handleCtrlNavigation);
      $(g.cEditStd).find('.edit_box').on('focus', function () {
        g.showEditArea();
      });
      $(g.cEditStd).on('keydown', '.edit_box, select', function (e) {
        if (e.which === 13) {
          // post on pressing "Enter"
          e.preventDefault();
          g.saveOrPostEditedCell();
        }
      });
      $(g.cEditStd).on('keydown', function (e) {
        if (!g.isEditCellTextEditable) {
          // prevent text editing
          e.preventDefault();
        }
      });
      $(g.cEditTextarea).on('keydown', 'textarea.edit_box, select', handleCtrlNavigation);
      $(g.cEditTextarea).find('.edit_box').on('focus', function () {
        g.showEditArea();
      });
      $(g.cEditTextarea).on('keydown', '.edit_box, select', function (e) {
        if (e.which === 13 && !e.shiftKey) {
          // post on pressing "Enter"
          e.preventDefault();
          g.saveOrPostEditedCell();
        }
      });
      $(g.cEditTextarea).on('keydown', function (e) {
        if (!g.isEditCellTextEditable) {
          // prevent text editing
          e.preventDefault();
        }
      });
      $('html').on('click', function (e) {
        // hide edit cell if the click is not fromDat edit area
        if ($(e.target).parents().index($(g.cEdit)) === -1 && !$(e.target).parents('.ui-datepicker-header').length && !$('.browse_foreign_modal.ui-dialog:visible').length && !$(e.target).closest('.dismissable').length) {
          g.hideEditCell();
        }
      }).on('keydown', function (e) {
        if (e.which === 27 && g.isCellEditActive) {
          // cancel on pressing "Esc"
          g.hideEditCell(true);
        }
      });
      $(g.o).find('div.save_edited').on('click', function () {
        g.hideEditCell();
        g.postEditedCell();
      });
      $(window).on('beforeunload', function () {
        if (g.isCellEdited) {
          return g.saveCellWarning;
        }
      });

      // attach to global div
      $(g.gDiv).append(g.cEditStd);
      $(g.gDiv).append(g.cEditTextarea);

      // add hint for grid editing feature when hovering "Edit" link in each table row
      if (Messages.strGridEditFeatureHint !== undefined) {
        Functions.tooltip($(g.t).find('.edit_row_anchor a'), 'a', Messages.strGridEditFeatureHint);
      }
    }
  };

  /** ****************
   * Initialize grid
   ******************/

  // wrap all truncated data cells with span indicating the original length
  // todo update the original length after a grid edit
  $(t).find('td.data.truncated:not(:has(>span))').filter(function () {
    return $(this).data('originallength') !== undefined;
  }).wrapInner(function () {
    return '<span title="' + Messages.strOriginalLength + ' ' + $(this).data('originallength') + '"></span>';
  });

  // wrap remaining cells, except actions cell, with span
  $(t).find('th, td:not(:has(>span))').wrapInner('<span></span>');

  // create grid elements
  g.gDiv = document.createElement('div'); // create global div

  // initialize the table variable
  g.t = t;

  // enclosing .sqlqueryresults div
  g.o = $(t).parents('.sqlqueryresults');

  // get data columns in the first row of the table
  var $firstRowCols = $(t).find('tr').first().find('th.draggable');

  // initialize visible headers count
  g.visibleHeadersCount = $firstRowCols.filter(':visible').length;

  // assign first column (actions) span
  if (!$(t).find('tr').first().find('th').first().hasClass('draggable')) {
    // action header exist
    g.actionSpan = $(t).find('tr').first().find('th').first().prop('colspan');
  } else {
    g.actionSpan = 0;
  }

  // assign table create time
  // table_create_time will only available if we are in "Browse" tab
  g.tableCreateTime = $(g.o).find('.table_create_time').val();

  // assign the hints
  g.sortHint = Messages.strSortHint;
  g.strMultiSortHint = Messages.strMultiSortHint;
  g.markHint = Messages.strColMarkHint;
  g.copyHint = Messages.strColNameCopyHint;

  // assign common hidden inputs
  var $commonHiddenInputs = $(g.o).find('div.common_hidden_inputs');
  g.server = $commonHiddenInputs.find('input[name=server]').val();
  g.db = $commonHiddenInputs.find('input[name=db]').val();
  g.table = $commonHiddenInputs.find('input[name=table]').val();

  // add table class
  $(t).addClass('pma_table');

  // add relative position to global div so that resize handlers are correctly positioned
  $(g.gDiv).css('position', 'relative');

  // link the global div
  $(t).before(g.gDiv);
  $(g.gDiv).append(t);

  // FEATURES
  if (isResizeEnabled) {
    g.initColResize();
  }
  // disable reordering for result from EXPLAIN or SHOW syntax, which do not have a table navigation panel
  if (isReorderEnabled && $(g.o).find('table.navigation').length > 0) {
    g.initColReorder();
  }
  if (isVisibEnabled) {
    g.initColVisib();
  }
  // make sure we have the ajax class
  if (isGridEditEnabled && $(t).is('.ajax')) {
    g.initGridEdit();
  }

  // create tooltip for each <th> with draggable class
  Functions.tooltip($(t).find('th.draggable'), 'th', g.updateHint());

  // register events for hint tooltip (anchors inside draggable th)
  $(t).find('th.draggable a').on('mouseenter', function () {
    g.showSortHint = true;
    g.showMultiSortHint = true;
    $(t).find('th.draggable').uiTooltip('option', {
      content: g.updateHint()
    });
  }).on('mouseleave', function () {
    g.showSortHint = false;
    g.showMultiSortHint = false;
    $(t).find('th.draggable').uiTooltip('option', {
      content: g.updateHint()
    });
  });

  // register events for dragging-related feature
  if (isResizeEnabled || isReorderEnabled) {
    $(document).on('mousemove', function (e) {
      g.dragMove(e);
    });
    $(document).on('mouseup', function (e) {
      $(g.o).removeClass('turnOffSelect');
      g.dragEnd(e);
    });
  }

  // some adjustment
  $(t).removeClass('data');
  $(g.gDiv).addClass('data');
};

/**
 * jQuery plugin to cancel selection in HTML code.
 */
(function ($) {
  $.fn.noSelect = function (p) {
    // no select plugin by Paulo P.Marinas
    var prevent = p === null ? true : p;
    /* eslint-disable compat/compat */
    var isMsie = navigator.userAgent.indexOf('MSIE') > -1 || !!window.navigator.userAgent.match(/Trident.*rv:11\./);
    var isFirefox = navigator.userAgent.indexOf('Firefox') > -1;
    var isSafari = navigator.userAgent.indexOf('Safari') > -1;
    var isOpera = navigator.userAgent.indexOf('Presto') > -1;
    /* eslint-enable compat/compat */
    if (prevent) {
      return this.each(function () {
        if (isMsie || isSafari) {
          $(this).on('selectstart', false);
        } else if (isFirefox) {
          $(this).css('MozUserSelect', 'none');
          $('body').trigger('focus');
        } else if (isOpera) {
          $(this).on('mousedown', false);
        } else {
          $(this).attr('unselectable', 'on');
        }
      });
    } else {
      return this.each(function () {
        if (isMsie || isSafari) {
          $(this).off('selectstart');
        } else if (isFirefox) {
          $(this).css('MozUserSelect', 'inherit');
        } else if (isOpera) {
          $(this).off('mousedown');
        } else {
          $(this).removeAttr('unselectable');
        }
      });
    }
  }; // end noSelect
})(jQuery);