Fix welcome page

Author: Yang Zhen

app/commands/commandBindings/file.js

@@ -46,6 +46,7 @@ function createFolderAtPath (path) {
 
 
 export function openFile (obj) {
+  if (!obj.path) return
   // 做一些encoding的调度
   if (FileState.initData.get('_init')) {
     when(() => !FileState.initData.get('_init'), () => {
@@ -276,12 +277,21 @@ const fileCommands = {
 
   // 'file:unsaved_files_list':
   'file:open_welcome': (c) => {
-    TabStore.createTab({
-      icon: 'fa fa-info-circle',
-      type: 'welcome',
-      title: 'Welcome',
-    })
-  }
+    // const activeTabGroup = TabStore.getState().activeTabGroup
+    const existingTabs = TabStore.findTab(
+      tab => tab.type === 'welcome'
+    )
+    if (existingTabs.length) {
+      const existingTab = existingTabs[0]
+      existingTab.activate()
+    } else {
+      TabStore.createTab({
+        icon: 'fa fa-info-circle',
+        type: 'welcome',
+        title: 'Welcome',
+      })
+    }
+  },
 }
 
 export default fileCommands

app/commons/Tab/state.js

@@ -45,7 +45,7 @@ function TabScope () {
   }
 
   @computed get isActive () {
-    return this.tabGroup.activeTab === this
+    return this.tabGroup && this.tabGroup.activeTab === this
   }
 
   @computed get siblings () {

app/components/Tab/actions.js

@@ -3,6 +3,7 @@ import mobxStore from 'mobxStore'
 import { createAction, handleActions, registerAction } from 'utils/actions'
 import state, { Tab, TabGroup } from './state'
 import { openFile } from '../../commands/commandBindings/file'
+import dispatchCommand from 'commands/dispatchCommand'
 
 export const TAB_CREATE = 'TAB_CREATE'
 export const TAB_STORE_HYDRATE = 'TAB_STORE_HYDRATE'
@@ -11,7 +12,11 @@ export const hydrate = registerAction(TAB_STORE_HYDRATE, (json) => {
   Object.values(json.tabGroups).forEach((tabGroupsValue) => {
     createGroup(tabGroupsValue.id)
   })
-  const openTabs = Object.values(json.tabs).map((tabValue) => {
+  const tabs = Object.values(json.tabs)
+  if (tabs.length === 0) {
+    dispatchCommand('file:open_welcome')
+  }
+  const openTabs = tabs.map((tabValue) => {
     const { path, editor, ...others } = tabValue
     const option = { path, editor, others }
     return openFile(option)

app/styles/core-ui/Welcome.styl

@@ -1,6 +1,9 @@
 .welcome-page {
   color: $text-color;
   padding: 10px 40px;
+  height: 100%;
+  width: 100%;
+  overflow: scroll;
   h1 {
     font-weight: normal;
     padding: 0;