Merge pull request #10909 from electron/update_remote
Simplify and remove excess code from remote module
This commit is contained in:
commit
8736a41cfb
1 changed files with 97 additions and 133 deletions
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@ -9,16 +9,11 @@ const {ipcRenderer, isPromise, CallbacksRegistry} = require('electron')
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const resolvePromise = Promise.resolve.bind(Promise)
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const callbacksRegistry = new CallbacksRegistry()
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const remoteObjectCache = v8Util.createIDWeakMap()
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// Convert the arguments object into an array of meta data.
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const wrapArgs = function (args, visited) {
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if (visited == null) {
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visited = new Set()
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}
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const valueToMeta = function (value) {
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function wrapArgs (args, visited = new Set()) {
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const valueToMeta = (value) => {
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// Check for circular reference.
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if (visited.has(value)) {
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return {
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@ -62,7 +57,7 @@ const wrapArgs = function (args, visited) {
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let meta = {
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type: 'object',
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name: value.constructor != null ? value.constructor.name : '',
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name: value.constructor ? value.constructor.name : '',
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members: []
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}
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visited.add(value)
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@ -99,7 +94,7 @@ const wrapArgs = function (args, visited) {
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// Populate object's members from descriptors.
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// The |ref| will be kept referenced by |members|.
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// This matches |getObjectMemebers| in rpc-server.
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const setObjectMembers = function (ref, object, metaId, members) {
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function setObjectMembers (ref, object, metaId, members) {
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if (!Array.isArray(members)) return
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for (let member of members) {
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@ -108,44 +103,41 @@ const setObjectMembers = function (ref, object, metaId, members) {
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let descriptor = { enumerable: member.enumerable }
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if (member.type === 'method') {
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const remoteMemberFunction = function (...args) {
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let command
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if (this && this.constructor === remoteMemberFunction) {
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// Constructor call.
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let ret = ipcRenderer.sendSync('ELECTRON_BROWSER_MEMBER_CONSTRUCTOR', metaId, member.name, wrapArgs(args))
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return metaToValue(ret)
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command = 'ELECTRON_BROWSER_MEMBER_CONSTRUCTOR'
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} else {
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// Call member function.
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let ret = ipcRenderer.sendSync('ELECTRON_BROWSER_MEMBER_CALL', metaId, member.name, wrapArgs(args))
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return metaToValue(ret)
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command = 'ELECTRON_BROWSER_MEMBER_CALL'
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}
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const ret = ipcRenderer.sendSync(command, metaId, member.name, wrapArgs(args))
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return metaToValue(ret)
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}
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let descriptorFunction = proxyFunctionProperties(remoteMemberFunction, metaId, member.name)
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descriptor.get = function () {
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descriptor.get = () => {
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descriptorFunction.ref = ref // The member should reference its object.
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return descriptorFunction
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}
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// Enable monkey-patch the method
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descriptor.set = function (value) {
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descriptor.set = (value) => {
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descriptorFunction = value
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return value
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}
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descriptor.configurable = true
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} else if (member.type === 'get') {
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descriptor.get = function () {
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return metaToValue(ipcRenderer.sendSync('ELECTRON_BROWSER_MEMBER_GET', metaId, member.name))
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descriptor.get = () => {
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const command = 'ELECTRON_BROWSER_MEMBER_GET'
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const meta = ipcRenderer.sendSync(command, metaId, member.name)
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return metaToValue(meta)
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}
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// Only set setter when it is writable.
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if (member.writable) {
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descriptor.set = function (value) {
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descriptor.set = (value) => {
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const args = wrapArgs([value])
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const meta = ipcRenderer.sendSync('ELECTRON_BROWSER_MEMBER_SET', metaId, member.name, args)
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// Meta will be non-null when a setter error occurred so parse it
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// to a value so it gets re-thrown.
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if (meta != null) {
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metaToValue(meta)
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}
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const command = 'ELECTRON_BROWSER_MEMBER_SET'
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const meta = ipcRenderer.sendSync(command, metaId, member.name, args)
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if (meta != null) metaToValue(meta)
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return value
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}
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}
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@ -157,7 +149,7 @@ const setObjectMembers = function (ref, object, metaId, members) {
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// Populate object's prototype from descriptor.
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// This matches |getObjectPrototype| in rpc-server.
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const setObjectPrototype = function (ref, object, metaId, descriptor) {
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function setObjectPrototype (ref, object, metaId, descriptor) {
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if (descriptor === null) return
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let proto = {}
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setObjectMembers(ref, proto, metaId, descriptor.members)
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@ -166,14 +158,15 @@ const setObjectPrototype = function (ref, object, metaId, descriptor) {
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}
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// Wrap function in Proxy for accessing remote properties
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const proxyFunctionProperties = function (remoteMemberFunction, metaId, name) {
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function proxyFunctionProperties (remoteMemberFunction, metaId, name) {
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let loaded = false
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// Lazily load function properties
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const loadRemoteProperties = () => {
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if (loaded) return
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loaded = true
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const meta = ipcRenderer.sendSync('ELECTRON_BROWSER_MEMBER_GET', metaId, name)
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const command = 'ELECTRON_BROWSER_MEMBER_GET'
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const meta = ipcRenderer.sendSync(command, metaId, name)
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setObjectMembers(remoteMemberFunction, remoteMemberFunction, meta.id, meta.members)
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}
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@ -186,13 +179,9 @@ const proxyFunctionProperties = function (remoteMemberFunction, metaId, name) {
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get: (target, property, receiver) => {
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if (!target.hasOwnProperty(property)) loadRemoteProperties()
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const value = target[property]
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// Bind toString to target if it is a function to avoid
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// Function.prototype.toString is not generic errors
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if (property === 'toString' && typeof value === 'function') {
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return value.bind(target)
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}
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return value
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},
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ownKeys: (target) => {
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@ -201,7 +190,7 @@ const proxyFunctionProperties = function (remoteMemberFunction, metaId, name) {
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},
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getOwnPropertyDescriptor: (target, property) => {
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let descriptor = Object.getOwnPropertyDescriptor(target, property)
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if (descriptor != null) return descriptor
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if (descriptor) return descriptor
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loadRemoteProperties()
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return Object.getOwnPropertyDescriptor(target, property)
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}
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@ -209,155 +198,130 @@ const proxyFunctionProperties = function (remoteMemberFunction, metaId, name) {
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}
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// Convert meta data from browser into real value.
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const metaToValue = function (meta) {
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var el, i, len, ref1, results, ret
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switch (meta.type) {
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case 'value':
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return meta.value
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case 'array':
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ref1 = meta.members
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results = []
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for (i = 0, len = ref1.length; i < len; i++) {
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el = ref1[i]
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results.push(metaToValue(el))
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}
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return results
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case 'buffer':
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return Buffer.from(meta.value)
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case 'promise':
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return resolvePromise({then: metaToValue(meta.then)})
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case 'error':
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return metaToPlainObject(meta)
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case 'date':
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return new Date(meta.value)
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case 'exception':
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throw new Error(meta.message + '\n' + meta.stack)
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default:
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if (remoteObjectCache.has(meta.id)) return remoteObjectCache.get(meta.id)
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function metaToValue (meta) {
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const types = {
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value: () => meta.value,
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array: () => meta.members.map((member) => metaToValue(member)),
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buffer: () => Buffer.from(meta.value),
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promise: () => resolvePromise({then: metaToValue(meta.then)}),
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error: () => metaToPlainObject(meta),
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date: () => new Date(meta.value),
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exception: () => { throw new Error(`${meta.message}\n${meta.stack}`) }
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}
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if (meta.type === 'function') {
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// A shadow class to represent the remote function object.
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let remoteFunction = function (...args) {
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if (this && this.constructor === remoteFunction) {
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// Constructor call.
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let obj = ipcRenderer.sendSync('ELECTRON_BROWSER_CONSTRUCTOR', meta.id, wrapArgs(args))
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// Returning object in constructor will replace constructed object
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// with the returned object.
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// http://stackoverflow.com/questions/1978049/what-values-can-a-constructor-return-to-avoid-returning-this
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return metaToValue(obj)
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} else {
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// Function call.
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let obj = ipcRenderer.sendSync('ELECTRON_BROWSER_FUNCTION_CALL', meta.id, wrapArgs(args))
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return metaToValue(obj)
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}
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if (meta.type in types) {
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return types[meta.type]()
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} else {
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let ret
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if (remoteObjectCache.has(meta.id)) {
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return remoteObjectCache.get(meta.id)
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}
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// A shadow class to represent the remote function object.
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if (meta.type === 'function') {
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let remoteFunction = function (...args) {
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let command
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if (this && this.constructor === remoteFunction) {
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command = 'ELECTRON_BROWSER_CONSTRUCTOR'
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} else {
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command = 'ELECTRON_BROWSER_FUNCTION_CALL'
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}
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ret = remoteFunction
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} else {
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ret = {}
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const obj = ipcRenderer.sendSync(command, meta.id, wrapArgs(args))
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return metaToValue(obj)
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}
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ret = remoteFunction
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} else {
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ret = {}
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}
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// Populate delegate members.
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setObjectMembers(ret, ret, meta.id, meta.members)
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// Populate delegate prototype.
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setObjectPrototype(ret, ret, meta.id, meta.proto)
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setObjectMembers(ret, ret, meta.id, meta.members)
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setObjectPrototype(ret, ret, meta.id, meta.proto)
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Object.defineProperty(ret.constructor, 'name', { value: meta.name })
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// Set constructor.name to object's name.
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Object.defineProperty(ret.constructor, 'name', { value: meta.name })
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// Track delegate object's life time, and tell the browser to clean up
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// when the object is GCed.
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v8Util.setRemoteObjectFreer(ret, meta.id)
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// Remember object's id.
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v8Util.setHiddenValue(ret, 'atomId', meta.id)
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remoteObjectCache.set(meta.id, ret)
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return ret
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// Track delegate obj's lifetime & tell browser to clean up when object is GCed.
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v8Util.setRemoteObjectFreer(ret, meta.id)
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v8Util.setHiddenValue(ret, 'atomId', meta.id)
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remoteObjectCache.set(meta.id, ret)
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return ret
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}
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}
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// Construct a plain object from the meta.
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const metaToPlainObject = function (meta) {
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var i, len, obj, ref1
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obj = (function () {
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switch (meta.type) {
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case 'error':
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return new Error()
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default:
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return {}
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}
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})()
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ref1 = meta.members
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for (i = 0, len = ref1.length; i < len; i++) {
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let {name, value} = ref1[i]
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function metaToPlainObject (meta) {
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const obj = (() => meta.type === 'error' ? new Error() : {})()
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for (let i = 0; i < meta.members.length; i++) {
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let {name, value} = meta.members[i]
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obj[name] = value
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}
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return obj
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}
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// Browser calls a callback in renderer.
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ipcRenderer.on('ELECTRON_RENDERER_CALLBACK', function (event, id, args) {
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ipcRenderer.on('ELECTRON_RENDERER_CALLBACK', (event, id, args) => {
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callbacksRegistry.apply(id, metaToValue(args))
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})
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// A callback in browser is released.
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ipcRenderer.on('ELECTRON_RENDERER_RELEASE_CALLBACK', function (event, id) {
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ipcRenderer.on('ELECTRON_RENDERER_RELEASE_CALLBACK', (event, id) => {
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callbacksRegistry.remove(id)
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})
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process.on('exit', () => {
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ipcRenderer.sendSync('ELECTRON_BROWSER_CONTEXT_RELEASE')
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const command = 'ELECTRON_BROWSER_CONTEXT_RELEASE'
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ipcRenderer.sendSync(command)
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})
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// Get remote module.
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exports.require = function (module) {
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return metaToValue(ipcRenderer.sendSync('ELECTRON_BROWSER_REQUIRE', module))
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exports.require = (module) => {
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const command = 'ELECTRON_BROWSER_REQUIRE'
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const meta = ipcRenderer.sendSync(command, module)
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return metaToValue(meta)
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}
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// Alias to remote.require('electron').xxx.
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exports.getBuiltin = function (module) {
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return metaToValue(ipcRenderer.sendSync('ELECTRON_BROWSER_GET_BUILTIN', module))
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exports.getBuiltin = (module) => {
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const command = 'ELECTRON_BROWSER_GET_BUILTIN'
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const meta = ipcRenderer.sendSync(command, module)
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return metaToValue(meta)
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}
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// Get current BrowserWindow.
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exports.getCurrentWindow = function () {
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return metaToValue(ipcRenderer.sendSync('ELECTRON_BROWSER_CURRENT_WINDOW'))
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exports.getCurrentWindow = () => {
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const command = 'ELECTRON_BROWSER_CURRENT_WINDOW'
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const meta = ipcRenderer.sendSync(command)
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return metaToValue(meta)
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}
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// Get current WebContents object.
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exports.getCurrentWebContents = function () {
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exports.getCurrentWebContents = () => {
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return metaToValue(ipcRenderer.sendSync('ELECTRON_BROWSER_CURRENT_WEB_CONTENTS'))
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}
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// Get a global object in browser.
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exports.getGlobal = function (name) {
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return metaToValue(ipcRenderer.sendSync('ELECTRON_BROWSER_GLOBAL', name))
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exports.getGlobal = (name) => {
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const command = 'ELECTRON_BROWSER_GLOBAL'
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const meta = ipcRenderer.sendSync(command, name)
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return metaToValue(meta)
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}
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// Get the process object in browser.
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exports.__defineGetter__('process', function () {
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return exports.getGlobal('process')
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})
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exports.__defineGetter__('process', () => exports.getGlobal('process'))
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// Create a funtion that will return the specifed value when called in browser.
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exports.createFunctionWithReturnValue = function (returnValue) {
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const func = function () {
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return returnValue
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}
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// Create a function that will return the specified value when called in browser.
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exports.createFunctionWithReturnValue = (returnValue) => {
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const func = () => returnValue
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v8Util.setHiddenValue(func, 'returnValue', true)
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return func
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}
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// Get the guest WebContents from guestInstanceId.
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exports.getGuestWebContents = function (guestInstanceId) {
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const meta = ipcRenderer.sendSync('ELECTRON_BROWSER_GUEST_WEB_CONTENTS', guestInstanceId)
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exports.getGuestWebContents = (guestInstanceId) => {
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const command = 'ELECTRON_BROWSER_GUEST_WEB_CONTENTS'
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const meta = ipcRenderer.sendSync(command, guestInstanceId)
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return metaToValue(meta)
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}
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const addBuiltinProperty = (name) => {
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Object.defineProperty(exports, name, {
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get: function () {
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return exports.getBuiltin(name)
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}
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get: () => exports.getBuiltin(name)
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})
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}
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