react-flexigrid/lib/utils.js

A React table component designed to allow presenting millions of rows of data.

import translateDOMPositionXY from './dom/translateDOMPositionXY';

import _clamp from 'clamp';
export { _clamp as clamp };
import _deepEqual from 'lodash.isequal';
export { _deepEqual as deepEqual };
import _shallowEqual from 'shallowequal';
export { _shallowEqual as shallowEqual };

var functionReturnTrue = function functionReturnTrue() {
  return true;
};
var functionReturnFalse = function functionReturnFalse() {
  return false;
};

var nativeRequestAnimationFrame = global.requestAnimationFrame || global.webkitRequestAnimationFrame || global.mozRequestAnimationFrame || global.oRequestAnimationFrame || global.msRequestAnimationFrame;

export var cancelAnimationFrame = global.cancelAnimationFrame || global.webkitCancelAnimationFrame || global.mozCancelAnimationFrame || global.oCancelAnimationFrame || global.msCancelAnimationFrame || global.clearTimeout;

var animationFrameTime = 0;

export var requestAnimationFrame = nativeRequestAnimationFrame || function (callback) {
  var currTime = Date.now();
  var timeDelay = Math.max(0, 16 - (currTime - animationFrameTime));
  animationFrameTime = currTime + timeDelay;
  return global.setTimeout(function () {
    callback(Date.now());
  }, timeDelay);
};

export function translateDOMPosition(style, x, y) {
  var initialRender = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;

  if (initialRender) {
    style.left = x + 'px';
    style.top = y + 'px';
  } else {
    translateDOMPositionXY(style, x, y);
  }
}

export function debounce(func, wait, context) {
  var setTimeoutFunc = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : setTimeout;
  var clearTimeoutFunc = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : clearTimeout;

  var timeout = void 0;

  var debouncer = function debouncer() {
    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    debouncer.reset();

    var callback = function callback() {
      func.apply(context, args);
    };
    timeout = setTimeoutFunc(callback, wait);
  };

  debouncer.reset = function () {
    clearTimeoutFunc(timeout);
  };

  return debouncer;
}

export function getJudgeFunction(fn) {
  if (typeof handleScrollX !== 'function') {
    return fn ? functionReturnTrue : functionReturnFalse;
  }
  return fn;
}