const attachGuest = function (event, embedderFrameId, elementInstanceId, guestInstanceId, params) {
const embedder = event.sender
// Destroy the old guest when attaching.
const key = `${embedder.id}-${elementInstanceId}`
const oldGuestInstanceId = embedderElementsMap[key]
if (oldGuestInstanceId != null) {
// Reattachment to the same guest is just a no-op.
if (oldGuestInstanceId === guestInstanceId) {
return
}
const oldGuestInstance = guestInstances[oldGuestInstanceId]
if (oldGuestInstance) {
oldGuestInstance.guest.detachFromOuterFrame()
}
}
const guestInstance = guestInstances[guestInstanceId]
// If this isn't a valid guest instance then do nothing.
if (!guestInstance) {
throw new Error(`Invalid guestInstanceId: ${guestInstanceId}`)
}
const { guest } = guestInstance
if (guest.hostWebContents !== event.sender) {
throw new Error(`Access denied to guestInstanceId: ${guestInstanceId}`)
}
// If this guest is already attached to an element then remove it
if (guestInstance.elementInstanceId) {
const oldKey = `${guestInstance.embedder.id}-${guestInstance.elementInstanceId}`
delete embedderElementsMap[oldKey]
// Remove guest from embedder if moving across web views
if (guest.viewInstanceId !== params.instanceId) {
webViewManager.removeGuest(guestInstance.embedder, guestInstanceId)
guestInstance.embedder._sendInternal(`ELECTRON_GUEST_VIEW_INTERNAL_DESTROY_GUEST-${guest.viewInstanceId}`)
}
}
const webPreferences = {
guestInstanceId: guestInstanceId,
nodeIntegration: params.nodeintegration != null ? params.nodeintegration : false,
enableRemoteModule: params.enableremotemodule,
plugins: params.plugins,
zoomFactor: embedder.getZoomFactor(),
webSecurity: !params.disablewebsecurity,
enableBlinkFeatures: params.blinkfeatures,
disableBlinkFeatures: params.disableblinkfeatures
}
// parse the 'webpreferences' attribute string, if set
// this uses the same parsing rules as window.open uses for its features
if (typeof params.webpreferences === 'string') {
parseFeaturesString(params.webpreferences, function (key, value) {
if (value === undefined) {
// no value was specified, default it to true
value = true
}
webPreferences[key] = value
})
}
if (params.preload) {
webPreferences.preloadURL = params.preload
}
// Return null from native window.open if allowpopups is unset
if (webPreferences.nativeWindowOpen === true && !params.allowpopups) {
webPreferences.disablePopups = true
}
// Security options that guest will always inherit from embedder
const inheritedWebPreferences = new Map([
['contextIsolation', true],
['javascript', false],
['nativeWindowOpen', true],
['nodeIntegration', false],
['enableRemoteModule', false],
['sandbox', true],
['nodeIntegrationInSubFrames', false]
])
// Inherit certain option values from embedder
const lastWebPreferences = embedder.getLastWebPreferences()
for (const [name, value] of inheritedWebPreferences) {
if (lastWebPreferences[name] === value) {
webPreferences[name] = value
}
}
embedder.emit('will-attach-webview', event, webPreferences, params)
if (event.defaultPrevented) {
if (guest.viewInstanceId == null) guest.viewInstanceId = params.instanceId
guest.destroy()
return
}
guest.attachParams = params
embedderElementsMap[key] = guestInstanceId
guest.setEmbedder(embedder)
guestInstance.embedder = embedder
guestInstance.elementInstanceId = elementInstanceId
watchEmbedder(embedder)
webViewManager.addGuest(guestInstanceId, elementInstanceId, embedder, guest, webPreferences)
guest.attachToIframe(embedder, embedderFrameId)
}
ipcMainInternal.on('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_OPEN', (event, url, frameName, features) => {
if (url == null || url === '') url = 'about:blank'
if (frameName == null) frameName = ''
if (features == null) features = ''
const options = {}
const ints = ['x', 'y', 'width', 'height', 'minWidth', 'maxWidth', 'minHeight', 'maxHeight', 'zoomFactor']
const webPreferences = ['zoomFactor', 'nodeIntegration', 'enableRemoteModule', 'preload', 'javascript', 'contextIsolation', 'webviewTag']
const disposition = 'new-window'
// Used to store additional features
const additionalFeatures = []
// Parse the features
parseFeaturesString(features, function (key, value) {
if (value === undefined) {
additionalFeatures.push(key)
} else {
// Don't allow webPreferences to be set since it must be an object
// that cannot be directly overridden
if (key === 'webPreferences') return
if (webPreferences.includes(key)) {
if (options.webPreferences == null) {
options.webPreferences = {}
}
options.webPreferences[key] = value
} else {
options[key] = value
}
}
})
if (options.left) {
if (options.x == null) {
options.x = options.left
}
}
if (options.top) {
if (options.y == null) {
options.y = options.top
}
}
if (options.title == null) {
options.title = frameName
}
if (options.width == null) {
options.width = 800
}
if (options.height == null) {
options.height = 600
}
for (const name of ints) {
if (options[name] != null) {
options[name] = parseInt(options[name], 10)
}
}
const referrer = { url: '', policy: 'default' }
ipcMainInternal.emit('ELECTRON_GUEST_WINDOW_MANAGER_INTERNAL_WINDOW_OPEN', event,
url, referrer, frameName, disposition, options, additionalFeatures)
})