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/* @flow */
// https://github.com/Hanks10100/weex-native-directive/tree/master/component
import { mergeOptions, isPlainObject, noop } from 'core/util/index'
import Watcher from 'core/observer/watcher'
import { initProxy } from 'core/instance/proxy'
import { initState, getData } from 'core/instance/state'
import { initRender } from 'core/instance/render'
import { initEvents } from 'core/instance/events'
import { initProvide, initInjections } from 'core/instance/inject'
import { initLifecycle, callHook } from 'core/instance/lifecycle'
import { initInternalComponent, resolveConstructorOptions } from 'core/instance/init'
import { registerComponentHook, updateComponentData } from '../../util/index'
let uid = 0
// override Vue.prototype._init
function initVirtualComponent (options: Object = {}) {
const vm: Component = this
const componentId = options.componentId
// virtual component uid
vm._uid = `virtual-component-${uid++}`
// a flag to avoid this being observed
vm._isVue = true
// merge options
if (options && options._isComponent) {
// optimize internal component instantiation
// since dynamic options merging is pretty slow, and none of the
// internal component options needs special treatment.
initInternalComponent(vm, options)
} else {
vm.$options = mergeOptions(
resolveConstructorOptions(vm.constructor),
options || {},
vm
)
}
/* istanbul ignore else */
if (process.env.NODE_ENV !== 'production') {
initProxy(vm)
} else {
vm._renderProxy = vm
}
vm._self = vm
initLifecycle(vm)
initEvents(vm)
initRender(vm)
callHook(vm, 'beforeCreate')
initInjections(vm) // resolve injections before data/props
initState(vm)
initProvide(vm) // resolve provide after data/props
callHook(vm, 'created')
// send initial data to native
const data = vm.$options.data
const params = typeof data === 'function'
? getData(data, vm)
: data || {}
if (isPlainObject(params)) {
updateComponentData(componentId, params)
}
registerComponentHook(componentId, 'lifecycle', 'attach', () => {
callHook(vm, 'beforeMount')
const updateComponent = () => {
vm._update(vm._vnode, false)
}
new Watcher(vm, updateComponent, noop, null, true)
vm._isMounted = true
callHook(vm, 'mounted')
})
registerComponentHook(componentId, 'lifecycle', 'detach', () => {
vm.$destroy()
})
}
// override Vue.prototype._update
function updateVirtualComponent (vnode?: VNode) {
const vm: Component = this
const componentId = vm.$options.componentId
if (vm._isMounted) {
callHook(vm, 'beforeUpdate')
}
vm._vnode = vnode
if (vm._isMounted && componentId) {
// TODO: data should be filtered and without bindings
const data = Object.assign({}, vm._data)
updateComponentData(componentId, data, () => {
callHook(vm, 'updated')
})
}
}
// listening on native callback
export function resolveVirtualComponent (vnode: MountedComponentVNode): VNode {
const BaseCtor = vnode.componentOptions.Ctor
const VirtualComponent = BaseCtor.extend({})
const cid = VirtualComponent.cid
VirtualComponent.prototype._init = initVirtualComponent
VirtualComponent.prototype._update = updateVirtualComponent
vnode.componentOptions.Ctor = BaseCtor.extend({
beforeCreate () {
// const vm: Component = this
// TODO: listen on all events and dispatch them to the
// corresponding virtual components according to the componentId.
// vm._virtualComponents = {}
const createVirtualComponent = (componentId, propsData) => {
// create virtual component
// const subVm =
new VirtualComponent({
componentId,
propsData
})
// if (vm._virtualComponents) {
// vm._virtualComponents[componentId] = subVm
// }
}
registerComponentHook(cid, 'lifecycle', 'create', createVirtualComponent)
},
beforeDestroy () {
delete this._virtualComponents
}
})
}