restructure files

Author: yyx990803

src/index.js

@@ -1,11 +1,106 @@
 import { warn } from './util'
-import Router from './router'
-
+import Recognizer from 'route-recognizer'
 import RouterApi from './router/api'
 import RouterInternal from './router/internal'
 import View from './directives/view'
 import Link from './directives/link'
 import Override from './override'
+import AbstractHistory from './history/abstract'
+import HashHistory from './history/hash'
+import HTML5History from './history/html5'
+
+const historyBackends = {
+  abstract: AbstractHistory,
+  hash: HashHistory,
+  html5: HTML5History
+}
+
+/**
+ * Router constructor
+ *
+ * @param {Object} [options]
+ */
+
+export default class Router {
+
+  constructor ({
+    hashbang = true,
+    abstract = false,
+    history = false,
+    saveScrollPosition = false,
+    transitionOnLoad = false,
+    suppressTransitionError = false,
+    root = null,
+    linkActiveClass = 'v-link-active'
+  } = {}) {
+
+    /* istanbul ignore if */
+    if (!Router.installed) {
+      throw new Error(
+        'Please install the Router with Vue.use() before ' +
+        'creating an instance.'
+      )
+    }
+
+    // Vue instances
+    this.app = null
+    this._views = []
+    this._children = []
+
+    // route recognizer
+    this._recognizer = new Recognizer()
+    this._guardRecognizer = new Recognizer()
+
+    // state
+    this._started = false
+    this._currentRoute = {}
+    this._currentTransition = null
+    this._previousTransition = null
+    this._notFoundHandler = null
+    this._beforeEachHook = null
+    this._afterEachHook = null
+
+    // feature detection
+    this._hasPushState =
+      typeof window !== 'undefined' &&
+      window.history &&
+      window.history.pushState
+
+    // trigger transition on initial render?
+    this._rendered = false
+    this._transitionOnLoad = transitionOnLoad
+
+    // history mode
+    this._abstract = abstract
+    this._hashbang = hashbang
+    this._history = this._hasPushState && history
+
+    // other options
+    this._saveScrollPosition = saveScrollPosition
+    this._linkActiveClass = linkActiveClass
+    this._suppress = suppressTransitionError
+
+    // create history object
+    let inBrowser = Router.Vue.util.inBrowser
+    this.mode = (!inBrowser || this._abstract)
+      ? 'abstract'
+      : this._history
+        ? 'html5'
+        : 'hash'
+
+    let History = historyBackends[this.mode]
+    let self = this
+    this.history = new History({
+      root: root,
+      hashbang: this._hashbang,
+      onChange: function (path, state, anchor) {
+        self._match(path, state, anchor)
+      }
+    })
+  }
+}
+
+Router.installed = false
 
 /**
  * Installation interface.
@@ -32,5 +127,3 @@ Router.install = function (Vue) {
 if (typeof window !== 'undefined' && window.Vue) {
   window.Vue.use(Router)
 }
-
-export default Router

src/router.js

@@ -1,4 +1,4 @@
-import Router from './router'
+import Router from './index'
 import RouteRecognizer from 'route-recognizer'
 const genQuery = RouteRecognizer.prototype.generateQueryString