支持SSR、升级Vue版本和增加新的icon (#40)

* search component add new style

* update vue version and support ssr

* unit test

* add new icon

* new icon

src/mixins/popup/index.js

@@ -67,6 +67,7 @@ export default {
      * 显示popup
      */
     open() {
+      if (this.$isServer) return;
       if (this.opened) return;
 
       this.opening = true;

src/mixins/popup/popup-context.js

@@ -1,8 +1,11 @@
 import merge from 'src/utils/merge';
+import Vue from 'vue';
 
 let context;
-if (window && window.popupContext) {
-  context = window.popupContext;
+const _global = Vue.prototype.$isServer ? global : window;
+
+if (_global && _global.popupContext) {
+  context = _global.popupContext;
 }
 
 const DEFAULT_CONTEXT = {
@@ -13,7 +16,7 @@ const DEFAULT_CONTEXT = {
   modalStack: []
 };
 
-context = window.popupContext = merge({}, DEFAULT_CONTEXT, context);
+context = _global.popupContext = merge({}, DEFAULT_CONTEXT, context);
 
 const PopupContext = {
   getContext(key) {

src/mixins/popup/popup-manager.js

@@ -1,7 +1,9 @@
+import Vue from 'vue';
 import { addClass } from 'src/utils/dom';
 import PopupContext from './popup-context';
 
 const getModal = function() {
+  if (Vue.prototype.$isServer) return;
   let modalDom = PopupContext.getContext('modalDom');
 
   if (modalDom) {

src/utils/scroll.js

@@ -1,3 +1,5 @@
+import Vue from 'vue';
+
 export default {
   debounce(func, wait, immediate) {
     var timeout, args, context, timestamp, result;
@@ -76,5 +78,5 @@ export default {
     return element.getBoundingClientRect().height;
   },
 
-  getComputedStyle: document.defaultView.getComputedStyle.bind(document.defaultView)
+  getComputedStyle: !Vue.prototype.$isServer && document.defaultView.getComputedStyle.bind(document.defaultView)
 };