hash.js
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/* @flow */
import type Router from '../index'
import { History } from './base'
import { cleanPath } from '../util/path'
import { getLocation } from './html5'
export class HashHistory extends History {
constructor (router: Router, base: ?string, fallback: boolean) {
super(router, base)
// check history fallback deeplinking
if (fallback && checkFallback(this.base)) {
return
}
ensureSlash()
}
// this is delayed until the app mounts
// to avoid the hashchange listener being fired too early
setupListeners () {
window.addEventListener('hashchange', () => {
if (!ensureSlash()) {
return
}
this.transitionTo(getHash(), route => {
replaceHash(route.fullPath)
})
})
}
push (location: RawLocation, onComplete?: Function, onAbort?: Function) {
this.transitionTo(location, route => {
pushHash(route.fullPath)
onComplete && onComplete(route)
}, onAbort)
}
replace (location: RawLocation, onComplete?: Function, onAbort?: Function) {
this.transitionTo(location, route => {
replaceHash(route.fullPath)
onComplete && onComplete(route)
}, onAbort)
}
go (n: number) {
window.history.go(n)
}
ensureURL (push?: boolean) {
const current = this.current.fullPath
if (getHash() !== current) {
push ? pushHash(current) : replaceHash(current)
}
}
getCurrentLocation () {
return getHash()
}
}
function checkFallback (base) {
const location = getLocation(base)
if (!/^\/#/.test(location)) {
window.location.replace(
cleanPath(base + '/#' + location)
)
return true
}
}
function ensureSlash (): boolean {
const path = getHash()
if (path.charAt(0) === '/') {
return true
}
replaceHash('/' + path)
return false
}
export function getHash (): string {
// We can't use window.location.hash here because it's not
// consistent across browsers - Firefox will pre-decode it!
const href = window.location.href
const index = href.indexOf('#')
return index === -1 ? '' : href.slice(index + 1)
}
function pushHash (path) {
window.location.hash = path
}
function replaceHash (path) {
const i = window.location.href.indexOf('#')
window.location.replace(
window.location.href.slice(0, i >= 0 ? i : 0) + '#' + path
)
}