diff --git a/CHANGELOG.md b/CHANGELOG.md
index 106c6cca..35c98924 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 - Add Typewriter Mode, The current line will always in the center of the document. If you change the current line, it will be auto scroll to the new line.
 
+- Add Focus Mode, the current paragraph's will be focused.
+
 **Optimization**
 
 - Optimize the display of path name and file name in title bar.
diff --git a/Untitled - unsaved b/Untitled - unsaved
index ade202ad..0695d91f 100644
--- a/Untitled - unsaved	
+++ b/Untitled - unsaved	
@@ -1,15 +1 @@
-wow
-
-
-
-owoww
-
-
-
-
-
-owow
-
-
-
-
+wowowo wowowow
diff --git a/src/editor/codeMirror/index.js b/src/editor/codeMirror/index.js
index 9019b66b..b08666f6 100644
--- a/src/editor/codeMirror/index.js
+++ b/src/editor/codeMirror/index.js
@@ -1,14 +1,17 @@
 import 'codemirror/addon/edit/closebrackets'
 import 'codemirror/addon/edit/closetag'
+import 'codemirror/addon/selection/active-line'
 import 'codemirror/mode/meta'
 import codeMirror from 'codemirror/lib/codemirror'
 
 import loadmode from './loadmode'
+import overlayMode from './overlayMode'
 import languages from './modes'
 import 'codemirror/lib/codemirror.css'
 import './index.css'
 
 loadmode(codeMirror)
+overlayMode(codeMirror)
 window.CodeMirror = codeMirror
 
 const modes = codeMirror.modeInfo
diff --git a/src/editor/codeMirror/overlayMode.js b/src/editor/codeMirror/overlayMode.js
new file mode 100644
index 00000000..18e8ba5e
--- /dev/null
+++ b/src/editor/codeMirror/overlayMode.js
@@ -0,0 +1,98 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// Utility function that allows modes to be combined. The mode given
+// as the base argument takes care of most of the normal mode
+// functionality, but a second (typically simple) mode is used, which
+// can override the style of text. Both modes get to parse all of the
+// text, but when both assign a non-null style to a piece of code, the
+// overlay wins, unless the combine argument was true and not overridden,
+// or state.overlay.combineTokens was true, in which case the styles are
+// combined.
+
+const overlayMode = CodeMirror => {
+  CodeMirror.overlayMode = function (base, overlay, combine) {
+    return {
+      startState () {
+        return {
+          base: CodeMirror.startState(base),
+          overlay: CodeMirror.startState(overlay),
+          basePos: 0,
+          baseCur: null,
+          overlayPos: 0,
+          overlayCur: null,
+          streamSeen: null
+        }
+      },
+
+      copyState (state) {
+        return {
+          base: CodeMirror.copyState(base, state.base),
+          overlay: CodeMirror.copyState(overlay, state.overlay),
+          basePos: state.basePos,
+          baseCur: null,
+          overlayPos: state.overlayPos,
+          overlayCur: null
+        }
+      },
+
+      token (stream, state) {
+        if (stream !== state.streamSeen ||
+          Math.min(state.basePos, state.overlayPos) < stream.start) {
+          state.streamSeen = stream
+          state.basePos = state.overlayPos = stream.start
+        }
+
+        if (stream.start === state.basePos) {
+          state.baseCur = base.token(stream, state.base)
+          state.basePos = stream.pos
+        }
+
+        if (stream.start === state.overlayPos) {
+          stream.pos = stream.start
+          state.overlayCur = overlay.token(stream, state.overlay)
+          state.overlayPos = stream.pos
+        }
+
+        stream.pos = Math.min(state.basePos, state.overlayPos)
+
+        // state.overlay.combineTokens always takes precedence over combine,
+        // unless set to null
+        if (state.overlayCur === null) {
+          return state.baseCur
+        } else if (
+          (state.baseCur !== null &&
+          state.overlay.combineTokens) ||
+          (combine && state.overlay.combineTokens === null)
+        ) {
+          return state.baseCur + ' ' + state.overlayCur
+        } else return state.overlayCur
+      },
+
+      indent: base.indent && function (state, textAfter) {
+        return base.indent(state.base, textAfter)
+      },
+
+      electricChars: base.electricChars,
+
+      innerMode (state) {
+        return {
+          state: state.base,
+          mode: base
+        }
+      },
+
+      blankLine (state) {
+        var baseToken, overlayToken
+        if (base.blankLine) baseToken = base.blankLine(state.base)
+        if (overlay.blankLine) overlayToken = overlay.blankLine(state.overlay)
+
+        return overlayToken == null
+          ? baseToken
+          : (combine && baseToken != null ? baseToken + ' ' + overlayToken : overlayToken)
+      }
+    }
+  }
+}
+
+export default overlayMode
diff --git a/src/editor/index.css b/src/editor/index.css
index c4bc7a57..2d614549 100644
--- a/src/editor/index.css
+++ b/src/editor/index.css
@@ -135,8 +135,8 @@ li.ag-task-list-item > input[type=checkbox] {
   height: inherit;
   margin: 4px 0px 0px;
   top: 1px;
-  width: 19px;
-  height: 19px;
+  width: 18px;
+  height: 18px;
   left: -20px;
 }
 
@@ -146,8 +146,8 @@ li.ag-task-list-item > input.ag-checkbox-checked ~ p {
 
 li.ag-task-list-item > input[type=checkbox]::before {
   content: '';
-  width: 16px;
-  height: 16px;
+  width: 14px;
+  height: 14px;
   box-sizing: border-box;
   display: inline-block;
   border: 2px solid #606266;
@@ -174,7 +174,7 @@ li.ag-task-list-item > input.ag-checkbox-checked::after {
   position: absolute;
   display: inline-block;
   top: 4px;
-  left: 4px;
+  left: 3px;
 }
 
 li p .ag-hide:first-child {
diff --git a/src/editor/index.js b/src/editor/index.js
index eafb3dfe..2b14cabe 100644
--- a/src/editor/index.js
+++ b/src/editor/index.js
@@ -390,10 +390,12 @@ class Aganippe {
     return this.contentState.wordCount()
   }
 
-  setMarkdown (text) {
-    // if text is blank, dont need to import markdown
-    if (!text.trim()) return
-    this.contentState.importMarkdown(text)
+  setMarkdown (markdown, cursor) {
+    // if markdown is blank, dont need to import markdown
+    if (!markdown.trim()) return
+    this.contentState.importMarkdown(markdown)
+    this.contentState.importCursor(cursor)
+    this.contentState.render()
     this.dispatchChange()
   }
 
diff --git a/src/editor/utils/importMarkdown.js b/src/editor/utils/importMarkdown.js
index f36b24f1..601c8154 100644
--- a/src/editor/utils/importMarkdown.js
+++ b/src/editor/utils/importMarkdown.js
@@ -226,21 +226,33 @@ const importRegister = ContentState => {
     return this.getStateFragment(markdown)
   }
 
+  ContentState.prototype.importCursor = function (cursor) {
+    // set cursor
+    if (cursor) {
+      // TODO for codeMirror cursor to aganippe cursor
+      const lastBlock = this.getLastBlock()
+      const key = lastBlock.key
+      const offset = lastBlock.text.length
+      this.cursor = {
+        start: { key, offset },
+        end: { key, offset }
+      }
+    } else {
+      const lastBlock = this.getLastBlock()
+      const key = lastBlock.key
+      const offset = lastBlock.text.length
+      this.cursor = {
+        start: { key, offset },
+        end: { key, offset }
+      }
+    }
+  }
+
   ContentState.prototype.importMarkdown = function (markdown) {
     // empty the blocks and codeBlocks
     this.keys = new Set()
     this.codeBlocks = new Map()
     this.blocks = this.getStateFragment(markdown)
-    // set cursor
-    const lastBlock = this.getLastBlock()
-    const key = lastBlock.key
-    const offset = lastBlock.text.length
-    this.cursor = {
-      start: { key, offset },
-      end: { key, offset }
-    }
-    // re-render
-    this.render()
   }
 }
 
diff --git a/src/main/actions/view.js b/src/main/actions/view.js
index c5b2d0f0..33752a0b 100644
--- a/src/main/actions/view.js
+++ b/src/main/actions/view.js
@@ -10,6 +10,15 @@ const HASH = {
 export const view = (win, item, type) => {
   const { checked } = item
   win.webContents.send('AGANI::view', { type, checked })
+
+  if (type === 'sourceCode') {
+    const viewMenuItem = getMenuItem('View')
+    viewMenuItem.submenu.items.forEach(item => {
+      if (/typewriter|focus/.test(HASH[item.label])) {
+        item.enabled = !checked
+      }
+    })
+  }
 }
 
 ipcMain.on('AGANI::ask-for-mode', e => {
diff --git a/src/renderer/App.vue b/src/renderer/App.vue
index 43ec12bf..e6372c3e 100644
--- a/src/renderer/App.vue
+++ b/src/renderer/App.vue
@@ -9,8 +9,18 @@
       :typewriter="typewriter"
       :focus="focus"
       :source-code="sourceCode"
+      :markdown="markdown"
+      :cursor="cursor"
+      v-if="!sourceCode"
     ></editor>
-    <search></search>
+    <source-code
+      v-else
+      :markdown="markdown"
+      :cursor="cursor"
+    ></source-code>
+    <search
+      v-if="!sourceCode"
+    ></search>
   </div>
 </template>
 
@@ -18,6 +28,7 @@
   import Editor from '@/components/editor'
   import TitleBar from '@/components/titleBar'
   import Search from '@/components/search'
+  import SourceCode from '@/components/sourceCode'
   import { mapState } from 'vuex'
 
   export default {
@@ -25,13 +36,14 @@
     components: {
       Editor,
       TitleBar,
-      Search
+      Search,
+      SourceCode
     },
     data () {
       return {}
     },
     computed: {
-      ...mapState(['pathname', 'windowActive', 'wordCount', 'typewriter', 'focus', 'sourceCode'])
+      ...mapState(['pathname', 'windowActive', 'wordCount', 'typewriter', 'focus', 'sourceCode', 'markdown', 'cursor'])
     },
     created () {
       const { dispatch } = this.$store
@@ -56,4 +68,10 @@
   .editor-container {
     padding-top: 22px;
   }
+  .editor-container .hide {
+    z-index: -1;
+    opacity: 0;
+    position: absolute;
+    left: -10000px;
+  }
 </style>
diff --git a/src/renderer/components/Editor.vue b/src/renderer/components/Editor.vue
index 74200f0e..13facdc6 100644
--- a/src/renderer/components/Editor.vue
+++ b/src/renderer/components/Editor.vue
@@ -1,7 +1,7 @@
 <template>
   <div
     class="editor-wrapper"
-    :class="{ 'typewriter': typewriter, 'focus': focus, 'source-code': sourceCode }"
+    :class="{ 'typewriter': typewriter, 'focus': focus, 'source': sourceCode }"
   >
     <div
       ref="editor"
@@ -81,7 +81,9 @@
       sourceCode: {
         type: Boolean,
         required: true
-      }
+      },
+      markdown: String,
+      cursor: Object
     },
     data () {
       return {
@@ -114,8 +116,14 @@
       this.$nextTick(() => {
         const ele = this.$refs.editor
         this.editor = new Aganippe(ele)
+        const { container } = this.editor
+        const { markdown } = this
 
-        bus.$on('file-loaded', this.handleFileLoaded)
+        if (markdown.trim()) {
+          this.setMarkdownToEditor(markdown)
+        }
+
+        bus.$on('file-loaded', this.setMarkdownToEditor)
         bus.$on('undo', () => this.editor.undo())
         bus.$on('redo', () => this.editor.redo())
         bus.$on('export', this.handleExport)
@@ -125,8 +133,6 @@
         bus.$on('replaceValue', this.handReplace)
         bus.$on('find', this.handleFind)
 
-        const { container } = this.editor
-
         this.editor.on('change', (markdown, wordCount) => {
           this.$store.dispatch('SAVE_FILE', { markdown, wordCount })
         })
@@ -210,16 +216,23 @@
         this.dialogTableVisible = false
         this.editor && this.editor.createTable(this.tableChecker)
       },
-      handleFileLoaded (file) {
-        this.editor && this.editor.setMarkdown(file)
+      setMarkdownToEditor (markdown) {
+        const { cursor } = this
+        this.editor && this.editor.setMarkdown(markdown, cursor)
       }
     },
     beforeDestroy () {
-      bus.$off('file-loaded', this.handleFileLoaded)
-      bus.$off('export-styled-html', this.handleExport('styledHtml'))
+      bus.$off('file-loaded', this.setMarkdownToEditor)
+      bus.$off('undo', () => this.editor.undo())
+      bus.$off('redo', () => this.editor.redo())
+      bus.$off('export', this.handleExport)
       bus.$off('paragraph', this.handleEditParagraph)
+      bus.$off('format', this.handleInlineFormat)
       bus.$off('searchValue', this.handleSearch)
+      bus.$off('replaceValue', this.handReplace)
       bus.$off('find', this.handleFind)
+
+      // this.editor.destroy()
       this.editor = null
     }
   }
@@ -231,6 +244,12 @@
   .editor-wrapper {
     height: calc(100vh - 22px);
   }
+  .editor-wrapper.source {
+    position: absolute;
+    z-index: -1;
+    left: -10000px;
+    opacity: 0;
+  }
   .editor-component {
     height: 100%;
     overflow: auto;
diff --git a/src/renderer/components/search.vue b/src/renderer/components/search.vue
index e28f4ac1..09885637 100644
--- a/src/renderer/components/search.vue
+++ b/src/renderer/components/search.vue
@@ -136,31 +136,39 @@
       }
     },
     created () {
-      bus.$on('find', () => {
+      bus.$on('find', this.listenFind)
+      bus.$on('replace', this.listenReplace)
+      bus.$on('findNext', this.listenFindNext)
+      bus.$on('findPrev', this.listenFindPrev)
+      document.addEventListener('click', this.docClick)
+      document.addEventListener('keyup', this.docKeyup)
+    },
+    beforeDestroy () {
+      bus.$off('find', this.listenFind)
+      bus.$off('replace', this.listenReplace)
+      bus.$off('findNext', this.listenFindNext)
+      bus.$off('findPrev', this.listenFindPrev)
+      document.removeEventListener('click', this.docClick)
+      document.removeEventListener('keyup', this.docKeyup)
+    },
+    methods: {
+      listenFind () {
         this.showSearch = true
         this.type = 'search'
         this.$nextTick(() => {
           this.$refs.search.focus()
         })
-      })
-      bus.$on('replace', () => {
+      },
+      listenReplace () {
         this.showSearch = true
         this.type = 'replace'
-      })
-      bus.$on('findNext', () => {
+      },
+      listenFindNext () {
         this.find('next')
-      })
-      bus.$on('findPrev', () => {
+      },
+      listenFindPrev () {
         this.find('prev')
-      })
-      document.addEventListener('click', this.docClick)
-      document.addEventListener('keyup', this.docKeyup)
-    },
-    beforeDestroy () {
-      document.removeEventListener('click', this.docClick)
-      document.removeEventListener('keyup', this.docKeyup)
-    },
-    methods: {
+      },
       docKeyup (event) {
         if (event.key === 'Escape') {
           this.emitSearch(true)
diff --git a/src/renderer/components/sourceCode.vue b/src/renderer/components/sourceCode.vue
new file mode 100644
index 00000000..087159bf
--- /dev/null
+++ b/src/renderer/components/sourceCode.vue
@@ -0,0 +1,86 @@
+<template>
+  <div class="source-code" ref="sourceCode">
+  </div>
+</template>
+
+<script>
+  import codeMirror, { setMode, setCursorAtLastLine } from '../../editor/codeMirror'
+  import ContentState from '../../editor/contentState'
+  import bus from '../bus'
+
+  export default {
+    props: {
+      markdown: String,
+      cursor: Object
+    },
+    data () {
+      return {
+        contentState: null,
+        editor: null
+      }
+    },
+    created () {
+      this.$nextTick(() => {
+        this.contentState = new ContentState()
+        const container = this.$refs.sourceCode
+        const editor = this.editor = codeMirror(container, {
+          value: this.markdown || '',
+          lineNumbers: true,
+          autofocus: true,
+          lineWrapping: true,
+          styleActiveLine: true,
+          lineNumberFormatter (line) {
+            if (line % 10 === 0 || line === 1) {
+              return line
+            } else {
+              return ''
+            }
+          }
+        })
+        bus.$on('file-loaded', this.setMarkdown)
+
+        editor.on('cursorActivity', (cm, event) => {
+          const cursor = cm.getCursor()
+          const markdown = cm.getValue()
+          // get word count
+          this.contentState.importMarkdown(markdown, cursor)
+          const wordCount = this.contentState.wordCount()
+          this.$store.dispatch('SAVE_FILE', { markdown, cursor, wordCount })
+        })
+
+        setMode(editor, 'markdown')
+        this.setMarkdown(this.markdown || '')
+      })
+    },
+    beforeDestory () {
+      bus.$off('file-loaded', this.setMarkdown)
+    },
+    methods: {
+      setMarkdown (markdown) {
+        const { editor } = this
+        this.editor.setValue(markdown)
+        setCursorAtLastLine(editor)
+      }
+    }
+  }
+</script>
+
+<style>
+  .source-code {
+    height: calc(100vh - 22px);
+    box-sizing: border-box;
+    overflow: auto;
+  }
+  .source-code .CodeMirror {
+    margin: 50px auto;
+    max-width: 860px;
+  }
+  .source-code .CodeMirror-gutters {
+    border-right: none;
+    background-color: transparent;
+  }
+  .source-code .CodeMirror-activeline-background,
+  .source-code .CodeMirror-activeline-gutter {
+    background: #F2F6FC;
+  }
+</style>
diff --git a/src/renderer/components/titleBar.vue b/src/renderer/components/titleBar.vue
index 410ba2a8..8499536d 100644
--- a/src/renderer/components/titleBar.vue
+++ b/src/renderer/components/titleBar.vue
@@ -34,6 +34,7 @@
       }
     },
     props: {
+      filename: String,
       pathname: String,
       active: Boolean,
       wordCount: Object
@@ -42,10 +43,6 @@
       paths () {
         const pathnameToken = this.pathname.split('/').filter(i => i)
         return pathnameToken.slice(0, pathnameToken.length - 1).slice(-3)
-      },
-      filename () {
-        const pathnameToken = this.pathname.split('/').filter(i => i)
-        return pathnameToken.pop()
       }
     },
     methods: {
diff --git a/src/renderer/store/editor.js b/src/renderer/store/editor.js
index 63762197..555fcd4f 100644
--- a/src/renderer/store/editor.js
+++ b/src/renderer/store/editor.js
@@ -12,9 +12,10 @@ const state = {
   typewriter: false, // typewriter mode
   focus: false, // focus mode
   sourceCode: false, // source code mode
-  pathname: 'Untitled - unsaved',
+  pathname: '',
   isSaved: true,
   markdown: '',
+  cursor: null,
   windowActive: true,
   wordCount: {
     paragraph: 0,
@@ -49,6 +50,9 @@ const mutations = {
   },
   SET_WORD_COUNT (state, wordCount) {
     state.wordCount = wordCount
+  },
+  SET_CURSOR (state, cursor) {
+    state.cursor = cursor
   }
 }
 
@@ -119,9 +123,10 @@ const actions = {
     const { filename, pathname } = state
     ipcRenderer.send('AGANI::response-export', { type, content, filename, pathname })
   },
-  SAVE_FILE ({ commit, state }, { markdown, wordCount }) {
+  SAVE_FILE ({ commit, state }, { markdown, wordCount, cursor }) {
     commit('SET_MARKDOWN', markdown)
-    commit('SET_WORD_COUNT', wordCount)
+    if (wordCount) commit('SET_WORD_COUNT', wordCount)
+    if (cursor) commit('SET_CURSOR', cursor)
     const { pathname } = state
     if (pathname) {
       commit('SET_STATUS', true)