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Code Editor : keyhandler.js

// global var that holds: 0- if ctrl key is not pressed 1- if ctrl key is pressed
var ctrlKeyHistory = 0;
/**
  * Allows moving around inputs/select by Ctrl+arrows
  *
  * @param {object} event data
  */

function onKeyDownArrowsHandler(event) {
  var e = event || window.event;
  var o = e.srcElement || e.target;

if (!o) {
    return;
  }

if (o.tagName !== 'TEXTAREA' && o.tagName !== 'INPUT' && o.tagName !== 'SELECT') {
    return;
  }

if (e.which !== 17 && e.which !== 37 && e.which !== 38 && e.which !== 39 && e.which !== 40) {
    return;
  }

if (!o.id) {
    return;
  }

if (e.type === 'keyup') {
    if (e.which === 17) {
      ctrlKeyHistory = 0;
    }

return;
  } else if (e.type === 'keydown') {
    if (e.which === 17) {
      ctrlKeyHistory = 1;
    }
  }

if (ctrlKeyHistory !== 1) {
    return;
  }

e.preventDefault();
  var pos = o.id.split('_');

if (pos[0] !== 'field' || typeof pos[2] === 'undefined') {
    return;
  }

var x = pos[2];
  var y = pos[1];

switch (e.keyCode) {
    case 38:
      // up
      y--;
      break;

case 40:
      // down
      y++;
      break;

case 37:
      // left
      x--;
      break;

case 39:
      // right
      x++;
      break;

default:
      return;
  } // eslint-disable-next-line compat/compat

var isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox/') > -1;
  var id = 'field_' + y + '_' + x;
  var nO = document.getElementById(id);

if (!nO) {
    id = 'field_' + y + '_' + x + '_0';
    nO = document.getElementById(id);
  } // skip non existent fields

if (!nO) {
    return;
  } // for firefox select tag

var lvalue = o.selectedIndex;
  var nOvalue = nO.selectedIndex;
  nO.focus();

if (isFirefox) {
    var ffcheck = 0;
    var ffversion;

for (ffversion = 3; ffversion < 25; ffversion++) {
      var isFirefoxV24 = navigator.userAgent.toLowerCase().indexOf('firefox/' + ffversion) > -1;

if (isFirefoxV24) {
        ffcheck = 1;
        break;
      }
    }

if (ffcheck === 1) {
      if (e.which === 38 || e.which === 37) {
        nOvalue++;
      } else if (e.which === 40 || e.which === 39) {
        nOvalue--;
      }

nO.selectedIndex = nOvalue;
    } else {
      if (e.which === 38 || e.which === 37) {
        lvalue++;
      } else if (e.which === 40 || e.which === 39) {
        lvalue--;
      }

o.selectedIndex = lvalue;
    }
  }

if (nO.tagName !== 'SELECT') {
    nO.select();
  }

e.returnValue = false;
}

AJAX.registerTeardown('keyhandler.js', function () {
  $(document).off('keydown keyup', '#table_columns');
  $(document).off('keydown keyup', 'table.insertRowTable');
});
AJAX.registerOnload('keyhandler.js', function () {
  $(document).on('keydown keyup', '#table_columns', function (event) {
    onKeyDownArrowsHandler(event.originalEvent);
  });
  $(document).on('keydown keyup', 'table.insertRowTable', function (event) {
    onKeyDownArrowsHandler(event.originalEvent);
  });
});

${this.title}

Code Editor : keyhandler.js