293 lines
10 KiB
JavaScript
293 lines
10 KiB
JavaScript
'use strict'
|
|
|
|
const { webFrame } = require('electron')
|
|
|
|
const v8Util = process.atomBinding('v8_util')
|
|
const ipcRenderer = require('@electron/internal/renderer/ipc-renderer-internal')
|
|
const guestViewInternal = require('@electron/internal/renderer/web-view/guest-view-internal')
|
|
const webViewConstants = require('@electron/internal/renderer/web-view/web-view-constants')
|
|
const errorUtils = require('@electron/internal/common/error-utils')
|
|
const {
|
|
syncMethods,
|
|
asyncCallbackMethods,
|
|
asyncPromiseMethods
|
|
} = require('@electron/internal/common/web-view-methods')
|
|
|
|
// ID generator.
|
|
let nextId = 0
|
|
|
|
const getNextId = function () {
|
|
return ++nextId
|
|
}
|
|
|
|
// Represents the internal state of the WebView node.
|
|
class WebViewImpl {
|
|
constructor (webviewNode) {
|
|
this.webviewNode = webviewNode
|
|
this.elementAttached = false
|
|
this.beforeFirstNavigation = true
|
|
this.hasFocus = false
|
|
|
|
// on* Event handlers.
|
|
this.on = {}
|
|
|
|
// Create internal iframe element.
|
|
this.internalElement = this.createInternalElement()
|
|
const shadowRoot = this.webviewNode.attachShadow({ mode: 'open' })
|
|
shadowRoot.innerHTML = '<!DOCTYPE html><style type="text/css">:host { display: flex; }</style>'
|
|
this.setupWebViewAttributes()
|
|
this.viewInstanceId = getNextId()
|
|
shadowRoot.appendChild(this.internalElement)
|
|
|
|
// Provide access to contentWindow.
|
|
Object.defineProperty(this.webviewNode, 'contentWindow', {
|
|
get: () => {
|
|
return this.internalElement.contentWindow
|
|
},
|
|
enumerable: true
|
|
})
|
|
}
|
|
|
|
createInternalElement () {
|
|
const iframeElement = document.createElement('iframe')
|
|
iframeElement.style.flex = '1 1 auto'
|
|
iframeElement.style.width = '100%'
|
|
iframeElement.style.border = '0'
|
|
v8Util.setHiddenValue(iframeElement, 'internal', this)
|
|
return iframeElement
|
|
}
|
|
|
|
// Resets some state upon reattaching <webview> element to the DOM.
|
|
reset () {
|
|
// If guestInstanceId is defined then the <webview> has navigated and has
|
|
// already picked up a partition ID. Thus, we need to reset the initialization
|
|
// state. However, it may be the case that beforeFirstNavigation is false BUT
|
|
// guestInstanceId has yet to be initialized. This means that we have not
|
|
// heard back from createGuest yet. We will not reset the flag in this case so
|
|
// that we don't end up allocating a second guest.
|
|
if (this.guestInstanceId) {
|
|
guestViewInternal.destroyGuest(this.guestInstanceId)
|
|
this.guestInstanceId = void 0
|
|
}
|
|
|
|
this.beforeFirstNavigation = true
|
|
this.attributes[webViewConstants.ATTRIBUTE_PARTITION].validPartitionId = true
|
|
|
|
// Since attachment swaps a local frame for a remote frame, we need our
|
|
// internal iframe element to be local again before we can reattach.
|
|
const newFrame = this.createInternalElement()
|
|
const oldFrame = this.internalElement
|
|
this.internalElement = newFrame
|
|
oldFrame.parentNode.replaceChild(newFrame, oldFrame)
|
|
}
|
|
|
|
// Sets the <webview>.request property.
|
|
setRequestPropertyOnWebViewNode (request) {
|
|
Object.defineProperty(this.webviewNode, 'request', {
|
|
value: request,
|
|
enumerable: true
|
|
})
|
|
}
|
|
|
|
// This observer monitors mutations to attributes of the <webview> and
|
|
// updates the BrowserPlugin properties accordingly. In turn, updating
|
|
// a BrowserPlugin property will update the corresponding BrowserPlugin
|
|
// attribute, if necessary. See BrowserPlugin::UpdateDOMAttribute for more
|
|
// details.
|
|
handleWebviewAttributeMutation (attributeName, oldValue, newValue) {
|
|
if (!this.attributes[attributeName] || this.attributes[attributeName].ignoreMutation) {
|
|
return
|
|
}
|
|
|
|
// Let the changed attribute handle its own mutation
|
|
this.attributes[attributeName].handleMutation(oldValue, newValue)
|
|
}
|
|
|
|
onElementResize () {
|
|
const resizeEvent = new Event('resize')
|
|
resizeEvent.newWidth = this.webviewNode.clientWidth
|
|
resizeEvent.newHeight = this.webviewNode.clientHeight
|
|
this.dispatchEvent(resizeEvent)
|
|
}
|
|
|
|
createGuest () {
|
|
return guestViewInternal.createGuest(this.buildParams(), (event, guestInstanceId) => {
|
|
this.attachGuestInstance(guestInstanceId)
|
|
})
|
|
}
|
|
|
|
createGuestSync () {
|
|
this.beforeFirstNavigation = false
|
|
this.attachGuestInstance(guestViewInternal.createGuestSync(this.buildParams()))
|
|
}
|
|
|
|
dispatchEvent (webViewEvent) {
|
|
this.webviewNode.dispatchEvent(webViewEvent)
|
|
}
|
|
|
|
// Adds an 'on<event>' property on the webview, which can be used to set/unset
|
|
// an event handler.
|
|
setupEventProperty (eventName) {
|
|
const propertyName = `on${eventName.toLowerCase()}`
|
|
return Object.defineProperty(this.webviewNode, propertyName, {
|
|
get: () => {
|
|
return this.on[propertyName]
|
|
},
|
|
set: (value) => {
|
|
if (this.on[propertyName]) {
|
|
this.webviewNode.removeEventListener(eventName, this.on[propertyName])
|
|
}
|
|
this.on[propertyName] = value
|
|
if (value) {
|
|
return this.webviewNode.addEventListener(eventName, value)
|
|
}
|
|
},
|
|
enumerable: true
|
|
})
|
|
}
|
|
|
|
// Updates state upon loadcommit.
|
|
onLoadCommit (webViewEvent) {
|
|
const oldValue = this.webviewNode.getAttribute(webViewConstants.ATTRIBUTE_SRC)
|
|
const newValue = webViewEvent.url
|
|
if (webViewEvent.isMainFrame && (oldValue !== newValue)) {
|
|
// Touching the src attribute triggers a navigation. To avoid
|
|
// triggering a page reload on every guest-initiated navigation,
|
|
// we do not handle this mutation.
|
|
this.attributes[webViewConstants.ATTRIBUTE_SRC].setValueIgnoreMutation(newValue)
|
|
}
|
|
}
|
|
|
|
// Emits focus/blur events.
|
|
onFocusChange () {
|
|
const hasFocus = document.activeElement === this.webviewNode
|
|
if (hasFocus !== this.hasFocus) {
|
|
this.hasFocus = hasFocus
|
|
this.dispatchEvent(new Event(hasFocus ? 'focus' : 'blur'))
|
|
}
|
|
}
|
|
|
|
onAttach (storagePartitionId) {
|
|
return this.attributes[webViewConstants.ATTRIBUTE_PARTITION].setValue(storagePartitionId)
|
|
}
|
|
|
|
buildParams () {
|
|
const params = {
|
|
instanceId: this.viewInstanceId,
|
|
userAgentOverride: this.userAgentOverride
|
|
}
|
|
for (const attributeName in this.attributes) {
|
|
if (this.attributes.hasOwnProperty(attributeName)) {
|
|
params[attributeName] = this.attributes[attributeName].getValue()
|
|
}
|
|
}
|
|
return params
|
|
}
|
|
|
|
attachGuestInstance (guestInstanceId) {
|
|
if (!this.elementAttached) {
|
|
// The element could be detached before we got response from browser.
|
|
return
|
|
}
|
|
this.internalInstanceId = getNextId()
|
|
this.guestInstanceId = guestInstanceId
|
|
guestViewInternal.attachGuest(this.internalInstanceId, this.guestInstanceId, this.buildParams(), this.internalElement.contentWindow)
|
|
// ResizeObserver is a browser global not recognized by "standard".
|
|
/* globals ResizeObserver */
|
|
// TODO(zcbenz): Should we deprecate the "resize" event? Wait, it is not
|
|
// even documented.
|
|
this.resizeObserver = new ResizeObserver(this.onElementResize.bind(this)).observe(this.internalElement)
|
|
}
|
|
}
|
|
|
|
const setupAttributes = () => {
|
|
require('@electron/internal/renderer/web-view/web-view-attributes')
|
|
}
|
|
|
|
const setupMethods = (WebViewElement) => {
|
|
// WebContents associated with this webview.
|
|
WebViewElement.prototype.getWebContents = function () {
|
|
const { getRemote } = require('@electron/internal/renderer/remote')
|
|
const getGuestWebContents = getRemote('getGuestWebContents')
|
|
const internal = v8Util.getHiddenValue(this, 'internal')
|
|
if (!internal.guestInstanceId) {
|
|
internal.createGuestSync()
|
|
}
|
|
return getGuestWebContents(internal.guestInstanceId)
|
|
}
|
|
|
|
// Focusing the webview should move page focus to the underlying iframe.
|
|
WebViewElement.prototype.focus = function () {
|
|
this.contentWindow.focus()
|
|
}
|
|
|
|
const getGuestInstanceId = function (self) {
|
|
const internal = v8Util.getHiddenValue(self, 'internal')
|
|
if (!internal.guestInstanceId) {
|
|
throw new Error('The WebView must be attached to the DOM and the dom-ready event emitted before this method can be called.')
|
|
}
|
|
return internal.guestInstanceId
|
|
}
|
|
|
|
// Forward proto.foo* method calls to WebViewImpl.foo*.
|
|
const createBlockHandler = function (method) {
|
|
return function (...args) {
|
|
const [error, result] = ipcRenderer.sendSync('ELECTRON_GUEST_VIEW_MANAGER_SYNC_CALL', getGuestInstanceId(this), method, args)
|
|
if (error) {
|
|
throw errorUtils.deserialize(error)
|
|
} else {
|
|
return result
|
|
}
|
|
}
|
|
}
|
|
for (const method of syncMethods) {
|
|
WebViewElement.prototype[method] = createBlockHandler(method)
|
|
}
|
|
|
|
const createNonBlockHandler = function (method) {
|
|
return function (...args) {
|
|
const callback = (typeof args[args.length - 1] === 'function') ? args.pop() : null
|
|
const requestId = getNextId()
|
|
ipcRenderer.once(`ELECTRON_GUEST_VIEW_MANAGER_ASYNC_CALL_RESPONSE_${requestId}`, function (event, error, result) {
|
|
if (error == null) {
|
|
if (callback) callback(result)
|
|
} else {
|
|
throw errorUtils.deserialize(error)
|
|
}
|
|
})
|
|
ipcRenderer.send('ELECTRON_GUEST_VIEW_MANAGER_ASYNC_CALL', requestId, getGuestInstanceId(this), method, args, callback != null)
|
|
}
|
|
}
|
|
|
|
for (const method of asyncCallbackMethods) {
|
|
WebViewElement.prototype[method] = createNonBlockHandler(method)
|
|
}
|
|
|
|
const createPromiseHandler = function (method) {
|
|
return function (...args) {
|
|
return new Promise((resolve, reject) => {
|
|
const callback = (typeof args[args.length - 1] === 'function') ? args.pop() : null
|
|
const requestId = getNextId()
|
|
|
|
ipcRenderer.once(`ELECTRON_GUEST_VIEW_MANAGER_ASYNC_CALL_RESPONSE_${requestId}`, function (event, error, result) {
|
|
if (error == null) {
|
|
if (callback) {
|
|
callback(result)
|
|
}
|
|
resolve(result)
|
|
} else {
|
|
reject(errorUtils.deserialize(error))
|
|
}
|
|
})
|
|
ipcRenderer.send('ELECTRON_GUEST_VIEW_MANAGER_ASYNC_CALL', requestId, getGuestInstanceId(this), method, args, callback != null)
|
|
})
|
|
}
|
|
}
|
|
|
|
for (const method of asyncPromiseMethods) {
|
|
WebViewElement.prototype[method] = createPromiseHandler(method)
|
|
}
|
|
}
|
|
|
|
module.exports = { setupAttributes, setupMethods, guestViewInternal, webFrame, WebViewImpl }
|