chushihua

node_modules/vue-router/src/util/route.js

@@ -0,0 +1,151 @@
+/* @flow */
+
+import type VueRouter from '../index'
+import { stringifyQuery } from './query'
+
+const trailingSlashRE = /\/?$/
+
+export function createRoute (
+  record: ?RouteRecord,
+  location: Location,
+  redirectedFrom?: ?Location,
+  router?: VueRouter
+): Route {
+  const stringifyQuery = router && router.options.stringifyQuery
+
+  let query: any = location.query || {}
+  try {
+    query = clone(query)
+  } catch (e) {}
+
+  const route: Route = {
+    name: location.name || (record && record.name),
+    meta: (record && record.meta) || {},
+    path: location.path || '/',
+    hash: location.hash || '',
+    query,
+    params: location.params || {},
+    fullPath: getFullPath(location, stringifyQuery),
+    matched: record ? formatMatch(record) : []
+  }
+  if (redirectedFrom) {
+    route.redirectedFrom = getFullPath(redirectedFrom, stringifyQuery)
+  }
+  return Object.freeze(route)
+}
+
+function clone (value) {
+  if (Array.isArray(value)) {
+    return value.map(clone)
+  } else if (value && typeof value === 'object') {
+    const res = {}
+    for (const key in value) {
+      res[key] = clone(value[key])
+    }
+    return res
+  } else {
+    return value
+  }
+}
+
+// the starting route that represents the initial state
+export const START = createRoute(null, {
+  path: '/'
+})
+
+function formatMatch (record: ?RouteRecord): Array<RouteRecord> {
+  const res = []
+  while (record) {
+    res.unshift(record)
+    record = record.parent
+  }
+  return res
+}
+
+function getFullPath (
+  { path, query = {}, hash = '' },
+  _stringifyQuery
+): string {
+  const stringify = _stringifyQuery || stringifyQuery
+  return (path || '/') + stringify(query) + hash
+}
+
+export function isSameRoute (a: Route, b: ?Route, onlyPath: ?boolean): boolean {
+  if (b === START) {
+    return a === b
+  } else if (!b) {
+    return false
+  } else if (a.path && b.path) {
+    return a.path.replace(trailingSlashRE, '') === b.path.replace(trailingSlashRE, '') && (onlyPath ||
+      a.hash === b.hash &&
+      isObjectEqual(a.query, b.query))
+  } else if (a.name && b.name) {
+    return (
+      a.name === b.name &&
+      (onlyPath || (
+        a.hash === b.hash &&
+      isObjectEqual(a.query, b.query) &&
+      isObjectEqual(a.params, b.params))
+      )
+    )
+  } else {
+    return false
+  }
+}
+
+function isObjectEqual (a = {}, b = {}): boolean {
+  // handle null value #1566
+  if (!a || !b) return a === b
+  const aKeys = Object.keys(a).sort()
+  const bKeys = Object.keys(b).sort()
+  if (aKeys.length !== bKeys.length) {
+    return false
+  }
+  return aKeys.every((key, i) => {
+    const aVal = a[key]
+    const bKey = bKeys[i]
+    if (bKey !== key) return false
+    const bVal = b[key]
+    // query values can be null and undefined
+    if (aVal == null || bVal == null) return aVal === bVal
+    // check nested equality
+    if (typeof aVal === 'object' && typeof bVal === 'object') {
+      return isObjectEqual(aVal, bVal)
+    }
+    return String(aVal) === String(bVal)
+  })
+}
+
+export function isIncludedRoute (current: Route, target: Route): boolean {
+  return (
+    current.path.replace(trailingSlashRE, '/').indexOf(
+      target.path.replace(trailingSlashRE, '/')
+    ) === 0 &&
+    (!target.hash || current.hash === target.hash) &&
+    queryIncludes(current.query, target.query)
+  )
+}
+
+function queryIncludes (current: Dictionary<string>, target: Dictionary<string>): boolean {
+  for (const key in target) {
+    if (!(key in current)) {
+      return false
+    }
+  }
+  return true
+}
+
+export function handleRouteEntered (route: Route) {
+  for (let i = 0; i < route.matched.length; i++) {
+    const record = route.matched[i]
+    for (const name in record.instances) {
+      const instance = record.instances[name]
+      const cbs = record.enteredCbs[name]
+      if (!instance || !cbs) continue
+      delete record.enteredCbs[name]
+      for (let i = 0; i < cbs.length; i++) {
+        if (!instance._isBeingDestroyed) cbs[i](instance)
+      }
+    }
+  }
+}