update vc-align to 2.4.5

Author: tangjinzhou

components/vc-align/Align.jsx

@@ -1,7 +1,7 @@
 import PropTypes from '../_util/vue-types';
 import { alignElement, alignPoint } from 'dom-align';
 import addEventListener from '../_util/Dom/addEventListener';
-import { isWindow, buffer, isSamePoint } from './util';
+import { isWindow, buffer, isSamePoint, isSimilarValue, restoreFocus } from './util';
 import { cloneElement } from '../_util/vnode.js';
 import clonedeep from 'lodash/cloneDeep';
 import { getSlot } from '../_util/props-util';
@@ -73,7 +73,7 @@ export default {
           if (
             !reAlign &&
             source &&
-            (preRect.width !== sourceRect.width || preRect.height !== sourceRect.height)
+            (!isSimilarValue(preRect.width, sourceRect.width) || !isSimilarValue(preRect.height, sourceRect.height))
           ) {
             reAlign = true;
           }
@@ -121,11 +121,16 @@ export default {
         const element = getElement(target);
         const point = getPoint(target);
 
+        // IE lose focus after element realign
+        // We should record activeElement and restore later
+        const activeElement = document.activeElement;
+
         if (element) {
           result = alignElement(source, element, align);
         } else if (point) {
           result = alignPoint(source, point, align);
         }
+        restoreFocus(activeElement, source);
         this.aligned = true;
         this.$listeners.align && this.$listeners.align(source, result);
       }

components/vc-align/index.js

@@ -1,3 +1,3 @@
-// based on vc-align 2.4.3
+// based on vc-align 2.4.5
 import Align from './Align';
 export default Align;

components/vc-align/util.js

@@ -1,3 +1,4 @@
+import contains from '../_util/Dom/contains';
 export function buffer(fn, ms) {
   let timer;
 
@@ -36,3 +37,19 @@ export function isSamePoint(prev, next) {
 export function isWindow(obj) {
   return obj && typeof obj === 'object' && obj.window === obj;
 }
+
+export function isSimilarValue(val1, val2) {
+  const int1 = Math.floor(val1);
+  const int2 = Math.floor(val2);
+  return Math.abs(int1 - int2) <= 1;
+}
+
+export function restoreFocus(activeElement, container) {
+  // Focus back if is in the container
+  if (
+    activeElement !== document.activeElement &&
+    contains(container, activeElement)
+  ) {
+    activeElement.focus();
+  }
+}