311 lines
9.2 KiB
JavaScript
311 lines
9.2 KiB
JavaScript
'use strict'
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const ipcMain = require('electron').ipcMain
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const webContents = require('electron').webContents
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// Doesn't exist in early initialization.
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let webViewManager = null
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const supportedWebViewEvents = [
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'load-commit',
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'did-attach',
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'did-finish-load',
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'did-fail-load',
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'did-frame-finish-load',
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'did-start-loading',
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'did-stop-loading',
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'did-get-response-details',
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'did-get-redirect-request',
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'dom-ready',
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'console-message',
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'devtools-opened',
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'devtools-closed',
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'devtools-focused',
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'new-window',
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'will-navigate',
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'did-navigate',
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'did-navigate-in-page',
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'close',
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'crashed',
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'gpu-crashed',
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'plugin-crashed',
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'destroyed',
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'page-title-updated',
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'page-favicon-updated',
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'enter-html-full-screen',
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'leave-html-full-screen',
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'media-started-playing',
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'media-paused',
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'found-in-page',
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'did-change-theme-color',
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'update-target-url'
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]
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let nextGuestInstanceId = 0
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const guestInstances = {}
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const embedderElementsMap = {}
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// Moves the last element of array to the first one.
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const moveLastToFirst = function (list) {
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return list.unshift(list.pop())
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}
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// Generate guestInstanceId.
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const getNextGuestInstanceId = function () {
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return ++nextGuestInstanceId
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}
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// Create a new guest instance.
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const createGuest = function (embedder, params) {
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if (webViewManager == null) {
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webViewManager = process.atomBinding('web_view_manager')
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}
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const guestInstanceId = getNextGuestInstanceId(embedder)
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const guest = webContents.create({
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isGuest: true,
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partition: params.partition,
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embedder: embedder
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})
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guestInstances[guestInstanceId] = {
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guest: guest,
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embedder: embedder
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}
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watchEmbedder(embedder)
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// Init guest web view after attached.
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guest.on('did-attach', function () {
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let opts
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params = this.attachParams
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delete this.attachParams
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this.viewInstanceId = params.instanceId
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this.setSize({
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normal: {
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width: params.elementWidth,
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height: params.elementHeight
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},
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enableAutoSize: params.autosize,
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min: {
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width: params.minwidth,
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height: params.minheight
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},
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max: {
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width: params.maxwidth,
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height: params.maxheight
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}
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})
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if (params.src) {
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opts = {}
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if (params.httpreferrer) {
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opts.httpReferrer = params.httpreferrer
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}
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if (params.useragent) {
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opts.userAgent = params.useragent
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}
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this.loadURL(params.src, opts)
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}
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guest.allowPopups = params.allowpopups
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})
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// Dispatch events to embedder.
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const fn = function (event) {
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guest.on(event, function (_, ...args) {
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const embedder = getEmbedder(guestInstanceId)
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if (!embedder) {
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return
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}
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embedder.send.apply(embedder, ['ELECTRON_GUEST_VIEW_INTERNAL_DISPATCH_EVENT-' + guest.viewInstanceId, event].concat(args))
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})
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}
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for (const event of supportedWebViewEvents) {
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fn(event)
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}
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// Dispatch guest's IPC messages to embedder.
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guest.on('ipc-message-host', function (_, [channel, ...args]) {
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const embedder = getEmbedder(guestInstanceId)
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if (!embedder) {
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return
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}
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embedder.send.apply(embedder, ['ELECTRON_GUEST_VIEW_INTERNAL_IPC_MESSAGE-' + guest.viewInstanceId, channel].concat(args))
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})
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// Autosize.
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guest.on('size-changed', function (_, ...args) {
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const embedder = getEmbedder(guestInstanceId)
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if (!embedder) {
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return
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}
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embedder.send.apply(embedder, ['ELECTRON_GUEST_VIEW_INTERNAL_SIZE_CHANGED-' + guest.viewInstanceId].concat(args))
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})
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return guestInstanceId
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}
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// Attach the guest to an element of embedder.
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const attachGuest = function (embedder, elementInstanceId, guestInstanceId, params) {
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let guest, guestInstance, key, oldKey, oldGuestInstanceId, ref1, webPreferences
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// Destroy the old guest when attaching.
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key = (embedder.getId()) + '-' + elementInstanceId
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oldGuestInstanceId = embedderElementsMap[key]
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if (oldGuestInstanceId != null) {
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// Reattachment to the same guest is just a no-op.
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if (oldGuestInstanceId === guestInstanceId) {
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return
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}
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destroyGuest(embedder, oldGuestInstanceId)
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}
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guestInstance = guestInstances[guestInstanceId]
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// If this isn't a valid guest instance then do nothing.
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if (!guestInstance) {
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return
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}
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guest = guestInstance.guest
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// If this guest is already attached to an element then remove it
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if (guestInstance.elementInstanceId) {
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oldKey = (guestInstance.embedder.getId()) + '-' + guestInstance.elementInstanceId
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delete embedderElementsMap[oldKey]
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webViewManager.removeGuest(guestInstance.embedder, guestInstanceId)
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guestInstance.embedder.send('ELECTRON_GUEST_VIEW_INTERNAL_DESTROY_GUEST-' + guest.viewInstanceId)
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}
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webPreferences = {
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guestInstanceId: guestInstanceId,
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nodeIntegration: (ref1 = params.nodeintegration) != null ? ref1 : false,
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plugins: params.plugins,
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zoomFactor: params.zoomFactor,
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webSecurity: !params.disablewebsecurity,
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blinkFeatures: params.blinkfeatures,
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disableBlinkFeatures: params.disableblinkfeatures
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}
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// parse the 'webpreferences' attribute string, if set
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// this uses the same parsing rules as window.open uses for its features
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if (typeof params.webpreferences === 'string') {
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// split the attribute's value by ','
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let i, len
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let webpreferencesTokens = params.webpreferences.split(/,\s*/)
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for (i = 0, len = webpreferencesTokens.length; i < len; i++) {
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// expected form is either a name by itself (true boolean flag)
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// or a key/value, in the form of 'name=value'
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// split the tokens by '='
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let pref = webpreferencesTokens[i]
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let prefTokens = pref.split(/\s*=/)
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let name = prefTokens[0]
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let value = prefTokens[1]
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if (!name) continue
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// interpret the value as a boolean, if possible
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value = (value === 'yes' || value === '1') ? true : (value === 'no' || value === '0') ? false : value
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if (value === undefined) {
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// no value was specified, default it to true
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value = true
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}
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webPreferences[name] = value
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}
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}
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if (params.preload) {
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webPreferences.preloadURL = params.preload
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}
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webViewManager.addGuest(guestInstanceId, elementInstanceId, embedder, guest, webPreferences)
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guest.attachParams = params
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embedderElementsMap[key] = guestInstanceId
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guest.setEmbedder(embedder)
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guestInstance.embedder = embedder
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guestInstance.elementInstanceId = elementInstanceId
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watchEmbedder(embedder)
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}
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// Destroy an existing guest instance.
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const destroyGuest = function (embedder, guestInstanceId) {
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if (!(guestInstanceId in guestInstances)) {
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return
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}
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let guestInstance = guestInstances[guestInstanceId]
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if (embedder !== guestInstance.embedder) {
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return
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}
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webViewManager.removeGuest(embedder, guestInstanceId)
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guestInstance.guest.destroy()
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delete guestInstances[guestInstanceId]
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const key = embedder.getId() + '-' + guestInstance.elementInstanceId
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return delete embedderElementsMap[key]
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}
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// Once an embedder has had a guest attached we watch it for destruction to
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// destroy any remaining guests.
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const watchedEmbedders = new Set()
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const watchEmbedder = function (embedder) {
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if (watchedEmbedders.has(embedder)) {
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return
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}
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watchedEmbedders.add(embedder)
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const destroyEvents = ['will-destroy', 'crashed', 'did-navigate']
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const destroy = function () {
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for (const guestInstanceId of Object.keys(guestInstances)) {
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if (guestInstances[guestInstanceId].embedder === embedder) {
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destroyGuest(embedder, parseInt(guestInstanceId))
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}
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}
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for (const event of destroyEvents) {
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embedder.removeListener(event, destroy)
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}
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watchedEmbedders.delete(embedder)
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}
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for (const event of destroyEvents) {
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embedder.once(event, destroy)
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// Users might also listen to the crashed event, so we must ensure the guest
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// is destroyed before users' listener gets called. It is done by moving our
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// listener to the first one in queue.
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const listeners = embedder._events[event]
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if (Array.isArray(listeners)) {
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moveLastToFirst(listeners)
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}
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}
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}
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ipcMain.on('ELECTRON_GUEST_VIEW_MANAGER_CREATE_GUEST', function (event, params, requestId) {
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event.sender.send('ELECTRON_RESPONSE_' + requestId, createGuest(event.sender, params))
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})
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ipcMain.on('ELECTRON_GUEST_VIEW_MANAGER_ATTACH_GUEST', function (event, elementInstanceId, guestInstanceId, params) {
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attachGuest(event.sender, elementInstanceId, guestInstanceId, params)
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})
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ipcMain.on('ELECTRON_GUEST_VIEW_MANAGER_DESTROY_GUEST', function (event, guestInstanceId) {
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destroyGuest(event.sender, guestInstanceId)
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})
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ipcMain.on('ELECTRON_GUEST_VIEW_MANAGER_SET_SIZE', function (event, guestInstanceId, params) {
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const guestInstance = guestInstances[guestInstanceId]
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return guestInstance != null ? guestInstance.guest.setSize(params) : void 0
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})
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// Returns WebContents from its guest id.
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exports.getGuest = function (guestInstanceId) {
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const guestInstance = guestInstances[guestInstanceId]
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return guestInstance != null ? guestInstance.guest : void 0
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}
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// Returns the embedder of the guest.
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const getEmbedder = function (guestInstanceId) {
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const guestInstance = guestInstances[guestInstanceId]
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return guestInstance != null ? guestInstance.embedder : void 0
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}
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exports.getEmbedder = getEmbedder
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