material-ui/utils/rtl.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _keys = require('babel-runtime/core-js/object/keys');

var _keys2 = _interopRequireDefault(_keys);

exports.default = rtl;

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var reTranslate = /((^|\s)translate(3d|X)?\()(\-?[\d]+)/;
var reSkew = /((^|\s)skew(x|y)?\()\s*(\-?[\d]+)(deg|rad|grad)(,\s*(\-?[\d]+)(deg|rad|grad))?/;

/**
 * This function ensures that `style` supports both ltr and rtl directions by
 * checking `styleConstants` in `muiTheme` and replacing attribute keys if
 * necessary.
 */
function rtl(muiTheme) {
  if (muiTheme.isRtl) {
    return function (style) {
      if (style.directionInvariant === true) {
        return style;
      }

      var flippedAttributes = {
        // Keys and their replacements.
        right: 'left',
        left: 'right',
        marginRight: 'marginLeft',
        marginLeft: 'marginRight',
        paddingRight: 'paddingLeft',
        paddingLeft: 'paddingRight',
        borderRight: 'borderLeft',
        borderLeft: 'borderRight'
      };

      var newStyle = {};

      (0, _keys2.default)(style).forEach(function (attribute) {
        var value = style[attribute];
        var key = attribute;

        if (flippedAttributes.hasOwnProperty(attribute)) {
          key = flippedAttributes[attribute];
        }

        switch (attribute) {
          case 'float':
          case 'textAlign':
            if (value === 'right') {
              value = 'left';
            } else if (value === 'left') {
              value = 'right';
            }
            break;

          case 'direction':
            if (value === 'ltr') {
              value = 'rtl';
            } else if (value === 'rtl') {
              value = 'ltr';
            }
            break;

          case 'transform':
            if (!value) break;
            var matches = void 0;
            if (matches = value.match(reTranslate)) {
              value = value.replace(matches[0], matches[1] + -parseFloat(matches[4]));
            }
            if (matches = value.match(reSkew)) {
              value = value.replace(matches[0], matches[1] + -parseFloat(matches[4]) + matches[5] + matches[6] ? ', ' + (-parseFloat(matches[7]) + matches[8]) : '');
            }
            break;

          case 'transformOrigin':
            if (!value) break;
            if (value.indexOf('right') > -1) {
              value = value.replace('right', 'left');
            } else if (value.indexOf('left') > -1) {
              value = value.replace('left', 'right');
            }
            break;
        }

        newStyle[key] = value;
      });

      return newStyle;
    };
  }
}