imrc-datetime-picker/src/CSSPropertyOperations/index.js

(Improved) React component datetime picker by momentjs

/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */

'use strict';
import CSSProperty from './CSSProperty.js';
import dangerousStyleValue from './dangerousStyleValue.js';
// var CSSProperty = require('./CSSProperty.js');
var ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment');

var camelizeStyleName = require('fbjs/lib/camelizeStyleName');
// var dangerousStyleValue = require('./dangerousStyleValue.js');
var hyphenateStyleName = require('fbjs/lib/hyphenateStyleName');
var memoizeStringOnly = require('fbjs/lib/memoizeStringOnly');
var warning = require('fbjs/lib/warning');

var processStyleName = memoizeStringOnly(function (styleName) {
  return hyphenateStyleName(styleName);
});

var hasShorthandPropertyBug = false;
var styleFloatAccessor = 'cssFloat';
if (ExecutionEnvironment.canUseDOM) {
  var tempStyle = document.createElement('div').style;
  try {
    // IE8 throws "Invalid argument." if resetting shorthand style properties.
    tempStyle.font = '';
  } catch (e) {
    hasShorthandPropertyBug = true;
  }
  // IE8 only supports accessing cssFloat (standard) as styleFloat
  if (document.documentElement.style.cssFloat === undefined) {
    styleFloatAccessor = 'styleFloat';
  }
}

/**
 * Operations for dealing with CSS properties.
 */
var CSSPropertyOperations = {

  /**
   * Serializes a mapping of style properties for use as inline styles:
   *
   *   > createMarkupForStyles({width: '200px', height: 0})
   *   "width:200px;height:0;"
   *
   * Undefined values are ignored so that declarative programming is easier.
   * The result should be HTML-escaped before insertion into the DOM.
   *
   * @param {object} styles
   * @param {ReactDOMComponent} component
   * @return {?string}
   */
  createMarkupForStyles: function (styles, component) {
    var serialized = '';
    for (var styleName in styles) {
      if (!styles.hasOwnProperty(styleName)) {
        continue;
      }
      var styleValue = styles[styleName];
      if (styleValue != null) {
        serialized += processStyleName(styleName) + ':';
        serialized += dangerousStyleValue(styleName, styleValue, component) + ';';
      }
    }
    return serialized || null;
  },

  /**
   * Sets the value for multiple styles on a node.  If a value is specified as
   * '' (empty string), the corresponding style property will be unset.
   *
   * @param {DOMElement} node
   * @param {object} styles
   * @param {ReactDOMComponent} component
   */
  setValueForStyles: function (node, styles, component) {
    var style = node.style;
    for (var styleName in styles) {
      if (!styles.hasOwnProperty(styleName)) {
        continue;
      }
      var styleValue = dangerousStyleValue(styleName, styles[styleName], component);
      if (styleName === 'float' || styleName === 'cssFloat') {
        styleName = styleFloatAccessor;
      }
      if (styleValue) {
        style[styleName] = styleValue;
      } else {
        var expansion = hasShorthandPropertyBug && CSSProperty.shorthandPropertyExpansions[styleName];
        if (expansion) {
          // Shorthand property that IE8 won't like unsetting, so unset each
          // component to placate it
          for (var individualStyleName in expansion) {
            style[individualStyleName] = '';
          }
        } else {
          style[styleName] = '';
        }
      }
    }
  }

};

export default CSSPropertyOperations;