fix(datepicker): prevent calendar pane being in wrong position after …

…body scrolling is disabled.

Fixes #5201. Closes #5918.

src/components/datepicker/datePicker.js

@@ -502,8 +502,6 @@
  if (!this.isCalendarOpen && !this.isDisabled) {
  this.isCalendarOpen = true;
  this.calendarPaneOpenedFrom = event.target;
- this.attachCalendarPane();
- this.focusCalendar();
 
  // Because the calendar pane is attached directly to the body, it is possible that the
  // rest of the component (input, etc) is in a different scrolling container, such as
@@ -512,11 +510,14 @@
  // also matches the native behavior for things like `<select>` on Mac and Windows.
  this.$mdUtil.disableScrollAround(this.calendarPane);
 
+ this.attachCalendarPane();
+ this.focusCalendar();
+
  // Attach click listener inside of a timeout because, if this open call was triggered by a
  // click, we don't want it to be immediately propogated up to the body and handled.
  var self = this;
  this.$mdUtil.nextTick(function() {
- document.body.addEventListener('click', self.bodyClickHandler);
+ document.documentElement.addEventListener('click', self.bodyClickHandler);
  }, false);
 
  window.addEventListener('resize', this.windowResizeHandler);
@@ -532,7 +533,7 @@
  this.calendarPaneOpenedFrom = null;
  this.$mdUtil.enableScrolling();
 
- document.body.removeEventListener('click', this.bodyClickHandler);
+ document.documentElement.removeEventListener('click', this.bodyClickHandler);
  window.removeEventListener('resize', this.windowResizeHandler);
  }
  };

src/components/datepicker/datePicker.spec.js

@@ -333,14 +333,14 @@ describe('md-date-picker', function() {
  // Expect that the pane is on-screen.
  var paneRect = controller.calendarPane.getBoundingClientRect();
  expect(paneRect.bottom).toBeLessThan(window.innerHeight + 1);
- document.body.removeChild(superLongElement);
 
  document.body.removeChild(element);
+ document.body.removeChild(superLongElement);
  });
 
  it('should adjust the pane position if it would go off-screen if body is not scrollable',
  function() {
- // Make the body super huge and scroll halfway down.
+ // Make the body super huge and scroll down a bunch.
  var body = document.body;
  var superLongElement = document.createElement('div');
  superLongElement.style.height = '10000px';
@@ -365,13 +365,43 @@ describe('md-date-picker', function() {
  // Expect that the pane is on-screen.
  var paneRect = controller.calendarPane.getBoundingClientRect();
  expect(paneRect.bottom).toBeLessThan(window.innerHeight + 1);
- body.removeChild(superLongElement);
 
  // Restore body to pre-test state.
  body.removeChild(element);
+ body.removeChild(superLongElement);
  body.style.overflow = previousBodyOverflow;
  });
 
+ it('should keep the calendar pane in the right place with body scrolling disabled', function() {
+ // Make the body super huge and scroll down a bunch.
+ var body = document.body;
+ var superLongElement = document.createElement('div');
+ superLongElement.style.height = '10000px';
+ superLongElement.style.width = '1px';
+ body.appendChild(superLongElement);
+ body.scrollTop = 700;
+
+ // Absolutely position the picker such that the pane position doesn't need to be adjusted.
+ // (1/10 of the way down the screen).
+ element.style.position = 'absolute';
+ element.style.top = (document.body.scrollTop + (window.innerHeight * 0.10)) + 'px';
+ element.style.left = '0';
+ body.appendChild(element);
+
+ // Open the pane.
+ element.querySelector('md-button').click();
+ $timeout.flush();
+
+ // Expect that the calendar pane is in the same position as the inline datepicker.
+ var paneRect = controller.calendarPane.getBoundingClientRect();
+ var triggerRect = controller.inputContainer.getBoundingClientRect();
+ expect(paneRect.top).toBe(triggerRect.top);
+
+ // Restore body to pre-test state.
+ body.removeChild(superLongElement);
+ body.removeChild(element);
+ });
+
  it('should shink the calendar pane when it would otherwise not fit on the screen', function() {
  // Fake the window being very narrow so that the calendar pane won't fit on-screen.
  controller.$window = {innerWidth: 200, innherHeight: 800};