SC animation scheduler

scheduler.js

SC._animationBuffer = [];

/**
  If you try to animate a view that was previously
  `isVisible`: `NO`, you have to set the view to be
  `isVisible`: `YES`, then at the *next* run loop,
  try to animate the view, but only after forcing
  the browser to repaint the view.

  This function does all that for you, albeit
  causing a callback pyramid.
 */
SC.scheduleAnimation = function (view, callback) {
  if (SC.platform.supportsCSSTransitions) {
    var self = this,
        bufLen = this._animationBuffer.length;

    this._animationBuffer.push(callback);
    if (!bufLen) {
      this._pendingAnimation = setTimeout(function () {
        // Chrome workaround;                                                                                           
        // Breaks up the repaint buffer                                                                                 
        view.get('layer') && view.get('layer').offsetHeight;

        SC.run(function () {
          var buffer = self._animationBuffer,
              len = buffer.length,
              i;

          for (i = 0; i < len; i++) {
            buffer[i]();
          }
        });
        self._animationBuffer = [];
      }, 0);
    }
  } else {
    callback();
  }
};