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Viewing file:     dom.js (2.8 KB)      -rw-r--r--

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.findElPosition = findElPosition;
exports.getPointerPosition = getPointerPosition;
exports.blurNode = blurNode;
exports.focusNode = focusNode;
exports.hasClass = hasClass;

var _reactDom = require("react-dom");

/**
 * Offset Left
 * getBoundingClientRect technique from
 * John Resig http://ejohn.org/blog/getboundingclientrect-is-awesome/
 *
 * @function findElPosition
 * @param {Element} el Element from which to get offset
 * @return {Object}
 */
function findElPosition(el) {
  var box;

  if (el.getBoundingClientRect && el.parentNode) {
    box = el.getBoundingClientRect();
  }

  if (!box) {
    return {
      left: 0,
      top: 0
    };
  }

  var _document = document,
      body = _document.body,
      docEl = _document.documentElement;
  var clientLeft = docEl.clientLeft || body.clientLeft || 0;
  var scrollLeft = window.pageXOffset || body.scrollLeft;
  var left = box.left + scrollLeft - clientLeft;
  var clientTop = docEl.clientTop || body.clientTop || 0;
  var scrollTop = window.pageYOffset || body.scrollTop;
  var top = box.top + scrollTop - clientTop; // Android sometimes returns slightly off decimal values, so need to round

  return {
    left: Math.round(left),
    top: Math.round(top)
  };
}
/**
 * Get pointer position in element
 * Returns an object with x and y coordinates.
 * The base on the coordinates are the bottom left of the element.
 *
 * @function getPointerPosition
 * @param {Element} el Element on which to get the pointer position on
 * @param {Event} event Event object
 * @return {Object} This object will have x and y coordinates corresponding to the mouse position
 */


function getPointerPosition(el, event) {
  var position = {};
  var box = findElPosition(el);
  var boxW = el.offsetWidth;
  var boxH = el.offsetHeight;
  var boxY = box.top;
  var boxX = box.left;
  var evtPageY = event.pageY;
  var evtPageX = event.pageX;

  if (event.changedTouches) {
    evtPageX = event.changedTouches[0].pageX;
    evtPageY = event.changedTouches[0].pageY;
  }

  position.y = Math.max(0, Math.min(1, (boxY - evtPageY + boxH) / boxH));
  position.x = Math.max(0, Math.min(1, (evtPageX - boxX) / boxW));
  return position;
} // blur an element


function blurNode(reactNode) {
  var domNode = (0, _reactDom.findDOMNode)(reactNode);

  if (domNode && domNode.blur) {
    domNode.blur();
  }
} // focus an element


function focusNode(reactNode) {
  var domNode = (0, _reactDom.findDOMNode)(reactNode);

  if (domNode && domNode.focus) {
    domNode.focus();
  }
} // check if an element has a class name


function hasClass(elm, cls) {
  var classes = elm.className.split(' ');

  for (var i = 0; i < classes.length; i++) {
    if (classes[i].toLowerCase() === cls.toLowerCase()) {
      return true;
    }
  }

  return false;
}