454 lines
16 KiB
JavaScript
454 lines
16 KiB
JavaScript
'user strict';
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var WebViewImpl, deprecate, getNextId, guestViewInternal, ipcRenderer, listener, nextId, ref, registerBrowserPluginElement, registerWebViewElement, remote, useCapture, v8Util, webFrame, webViewConstants,
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hasProp = {}.hasOwnProperty,
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slice = [].slice;
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ref = require('electron'), deprecate = ref.deprecate, webFrame = ref.webFrame, remote = ref.remote, ipcRenderer = ref.ipcRenderer;
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v8Util = process.atomBinding('v8_util');
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guestViewInternal = require('./guest-view-internal');
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webViewConstants = require('./web-view-constants');
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/* ID generator. */
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nextId = 0;
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getNextId = function() {
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return ++nextId;
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};
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/* Represents the internal state of the WebView node. */
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WebViewImpl = (function() {
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function WebViewImpl(webviewNode) {
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var shadowRoot;
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this.webviewNode = webviewNode;
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v8Util.setHiddenValue(this.webviewNode, 'internal', this);
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this.attached = false;
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this.elementAttached = false;
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this.beforeFirstNavigation = true;
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/* on* Event handlers. */
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this.on = {};
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this.browserPluginNode = this.createBrowserPluginNode();
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shadowRoot = this.webviewNode.createShadowRoot();
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this.setupWebViewAttributes();
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this.setupFocusPropagation();
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this.viewInstanceId = getNextId();
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shadowRoot.appendChild(this.browserPluginNode);
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// Subscribe to host's zoom level changes.
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this.onZoomLevelChanged = (zoomLevel) => {
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this.webviewNode.setZoomLevel(zoomLevel);
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}
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webFrame.on('zoom-level-changed', this.onZoomLevelChanged);
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}
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WebViewImpl.prototype.createBrowserPluginNode = function() {
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/*
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We create BrowserPlugin as a custom element in order to observe changes
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to attributes synchronously.
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*/
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var browserPluginNode;
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browserPluginNode = new WebViewImpl.BrowserPlugin();
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v8Util.setHiddenValue(browserPluginNode, 'internal', this);
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return browserPluginNode;
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};
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/* Resets some state upon reattaching <webview> element to the DOM. */
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WebViewImpl.prototype.reset = function() {
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// Unlisten the zoom-level-changed event.
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webFrame.removeListener('zoom-level-changed', this.onZoomLevelChanged);
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/*
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If guestInstanceId is defined then the <webview> has navigated and has
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already picked up a partition ID. Thus, we need to reset the initialization
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state. However, it may be the case that beforeFirstNavigation is false BUT
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guestInstanceId has yet to be initialized. This means that we have not
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heard back from createGuest yet. We will not reset the flag in this case so
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that we don't end up allocating a second guest.
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*/
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if (this.guestInstanceId) {
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guestViewInternal.destroyGuest(this.guestInstanceId);
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this.webContents = null;
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this.guestInstanceId = void 0;
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this.beforeFirstNavigation = true;
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this.attributes[webViewConstants.ATTRIBUTE_PARTITION].validPartitionId = true;
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}
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return this.internalInstanceId = 0;
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};
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/* Sets the <webview>.request property. */
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WebViewImpl.prototype.setRequestPropertyOnWebViewNode = function(request) {
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return Object.defineProperty(this.webviewNode, 'request', {
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value: request,
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enumerable: true
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});
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};
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WebViewImpl.prototype.setupFocusPropagation = function() {
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if (!this.webviewNode.hasAttribute('tabIndex')) {
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/*
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<webview> needs a tabIndex in order to be focusable.
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TODO(fsamuel): It would be nice to avoid exposing a tabIndex attribute
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to allow <webview> to be focusable.
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See http://crbug.com/231664.
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*/
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this.webviewNode.setAttribute('tabIndex', -1);
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}
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this.webviewNode.addEventListener('focus', (function(_this) {
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return function(e) {
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/* Focus the BrowserPlugin when the <webview> takes focus. */
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return _this.browserPluginNode.focus();
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};
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})(this));
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return this.webviewNode.addEventListener('blur', (function(_this) {
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return function(e) {
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/* Blur the BrowserPlugin when the <webview> loses focus. */
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return _this.browserPluginNode.blur();
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};
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})(this));
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};
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/*
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This observer monitors mutations to attributes of the <webview> and
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updates the BrowserPlugin properties accordingly. In turn, updating
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a BrowserPlugin property will update the corresponding BrowserPlugin
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attribute, if necessary. See BrowserPlugin::UpdateDOMAttribute for more
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details.
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*/
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WebViewImpl.prototype.handleWebviewAttributeMutation = function(attributeName, oldValue, newValue) {
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if (!this.attributes[attributeName] || this.attributes[attributeName].ignoreMutation) {
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return;
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}
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/* Let the changed attribute handle its own mutation; */
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return this.attributes[attributeName].handleMutation(oldValue, newValue);
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};
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WebViewImpl.prototype.handleBrowserPluginAttributeMutation = function(attributeName, oldValue, newValue) {
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if (attributeName === webViewConstants.ATTRIBUTE_INTERNALINSTANCEID && !oldValue && !!newValue) {
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this.browserPluginNode.removeAttribute(webViewConstants.ATTRIBUTE_INTERNALINSTANCEID);
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this.internalInstanceId = parseInt(newValue);
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/* Track when the element resizes using the element resize callback. */
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webFrame.registerElementResizeCallback(this.internalInstanceId, this.onElementResize.bind(this));
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if (!this.guestInstanceId) {
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return;
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}
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return guestViewInternal.attachGuest(this.internalInstanceId, this.guestInstanceId, this.buildParams());
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}
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};
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WebViewImpl.prototype.onSizeChanged = function(webViewEvent) {
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var height, maxHeight, maxWidth, minHeight, minWidth, newHeight, newWidth, node, width;
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newWidth = webViewEvent.newWidth;
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newHeight = webViewEvent.newHeight;
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node = this.webviewNode;
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width = node.offsetWidth;
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height = node.offsetHeight;
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/* Check the current bounds to make sure we do not resize <webview> */
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/* outside of current constraints. */
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maxWidth = this.attributes[webViewConstants.ATTRIBUTE_MAXWIDTH].getValue() | width;
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maxHeight = this.attributes[webViewConstants.ATTRIBUTE_MAXHEIGHT].getValue() | width;
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minWidth = this.attributes[webViewConstants.ATTRIBUTE_MINWIDTH].getValue() | width;
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minHeight = this.attributes[webViewConstants.ATTRIBUTE_MINHEIGHT].getValue() | width;
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minWidth = Math.min(minWidth, maxWidth);
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minHeight = Math.min(minHeight, maxHeight);
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if (!this.attributes[webViewConstants.ATTRIBUTE_AUTOSIZE].getValue() || (newWidth >= minWidth && newWidth <= maxWidth && newHeight >= minHeight && newHeight <= maxHeight)) {
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node.style.width = newWidth + 'px';
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node.style.height = newHeight + 'px';
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/*
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Only fire the DOM event if the size of the <webview> has actually
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changed.
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*/
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return this.dispatchEvent(webViewEvent);
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}
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};
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WebViewImpl.prototype.onElementResize = function(newSize) {
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/* Dispatch the 'resize' event. */
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var resizeEvent;
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resizeEvent = new Event('resize', {
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bubbles: true
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});
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resizeEvent.newWidth = newSize.width;
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resizeEvent.newHeight = newSize.height;
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this.dispatchEvent(resizeEvent);
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if (this.guestInstanceId) {
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return guestViewInternal.setSize(this.guestInstanceId, {
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normal: newSize
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});
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}
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};
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WebViewImpl.prototype.createGuest = function() {
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return guestViewInternal.createGuest(this.buildParams(), (function(_this) {
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return function(event, guestInstanceId) {
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return _this.attachWindow(guestInstanceId);
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};
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})(this));
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};
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WebViewImpl.prototype.dispatchEvent = function(webViewEvent) {
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return this.webviewNode.dispatchEvent(webViewEvent);
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};
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/* Adds an 'on<event>' property on the webview, which can be used to set/unset */
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/* an event handler. */
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WebViewImpl.prototype.setupEventProperty = function(eventName) {
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var propertyName;
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propertyName = 'on' + eventName.toLowerCase();
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return Object.defineProperty(this.webviewNode, propertyName, {
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get: (function(_this) {
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return function() {
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return _this.on[propertyName];
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};
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})(this),
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set: (function(_this) {
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return function(value) {
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if (_this.on[propertyName]) {
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_this.webviewNode.removeEventListener(eventName, _this.on[propertyName]);
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}
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_this.on[propertyName] = value;
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if (value) {
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return _this.webviewNode.addEventListener(eventName, value);
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}
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};
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})(this),
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enumerable: true
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});
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};
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/* Updates state upon loadcommit. */
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WebViewImpl.prototype.onLoadCommit = function(webViewEvent) {
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var newValue, oldValue;
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oldValue = this.webviewNode.getAttribute(webViewConstants.ATTRIBUTE_SRC);
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newValue = webViewEvent.url;
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if (webViewEvent.isMainFrame && (oldValue !== newValue)) {
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/*
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Touching the src attribute triggers a navigation. To avoid
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triggering a page reload on every guest-initiated navigation,
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we do not handle this mutation.
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*/
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return this.attributes[webViewConstants.ATTRIBUTE_SRC].setValueIgnoreMutation(newValue);
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}
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};
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WebViewImpl.prototype.onAttach = function(storagePartitionId) {
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return this.attributes[webViewConstants.ATTRIBUTE_PARTITION].setValue(storagePartitionId);
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};
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WebViewImpl.prototype.buildParams = function() {
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var attribute, attributeName, css, elementRect, params, ref1;
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params = {
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instanceId: this.viewInstanceId,
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userAgentOverride: this.userAgentOverride
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};
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ref1 = this.attributes;
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for (attributeName in ref1) {
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if (!hasProp.call(ref1, attributeName)) continue;
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attribute = ref1[attributeName];
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params[attributeName] = attribute.getValue();
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}
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/*
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When the WebView is not participating in layout (display:none)
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then getBoundingClientRect() would report a width and height of 0.
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However, in the case where the WebView has a fixed size we can
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use that value to initially size the guest so as to avoid a relayout of
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the on display:block.
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*/
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css = window.getComputedStyle(this.webviewNode, null);
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elementRect = this.webviewNode.getBoundingClientRect();
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params.elementWidth = parseInt(elementRect.width) || parseInt(css.getPropertyValue('width'));
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params.elementHeight = parseInt(elementRect.height) || parseInt(css.getPropertyValue('height'));
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return params;
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};
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WebViewImpl.prototype.attachWindow = function(guestInstanceId) {
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this.guestInstanceId = guestInstanceId;
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this.webContents = remote.getGuestWebContents(this.guestInstanceId);
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if (!this.internalInstanceId) {
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return true;
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}
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return guestViewInternal.attachGuest(this.internalInstanceId, this.guestInstanceId, this.buildParams());
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};
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return WebViewImpl;
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})();
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/* Registers browser plugin <object> custom element. */
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registerBrowserPluginElement = function() {
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var proto;
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proto = Object.create(HTMLObjectElement.prototype);
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proto.createdCallback = function() {
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this.setAttribute('type', 'application/browser-plugin');
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this.setAttribute('id', 'browser-plugin-' + getNextId());
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/* The <object> node fills in the <webview> container. */
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this.style.display = 'block';
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this.style.width = '100%';
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return this.style.height = '100%';
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};
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proto.attributeChangedCallback = function(name, oldValue, newValue) {
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var internal;
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internal = v8Util.getHiddenValue(this, 'internal');
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if (!internal) {
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return;
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}
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return internal.handleBrowserPluginAttributeMutation(name, oldValue, newValue);
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};
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proto.attachedCallback = function() {
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/* Load the plugin immediately. */
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var unused;
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return unused = this.nonExistentAttribute;
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};
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WebViewImpl.BrowserPlugin = webFrame.registerEmbedderCustomElement('browserplugin', {
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"extends": 'object',
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prototype: proto
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});
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delete proto.createdCallback;
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delete proto.attachedCallback;
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delete proto.detachedCallback;
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return delete proto.attributeChangedCallback;
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};
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/* Registers <webview> custom element. */
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registerWebViewElement = function() {
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var createBlockHandler, createNonBlockHandler, i, j, len, len1, m, methods, nonblockMethods, proto;
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proto = Object.create(HTMLObjectElement.prototype);
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proto.createdCallback = function() {
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return new WebViewImpl(this);
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};
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proto.attributeChangedCallback = function(name, oldValue, newValue) {
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var internal;
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internal = v8Util.getHiddenValue(this, 'internal');
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if (!internal) {
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return;
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}
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return internal.handleWebviewAttributeMutation(name, oldValue, newValue);
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};
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proto.detachedCallback = function() {
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var internal;
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internal = v8Util.getHiddenValue(this, 'internal');
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if (!internal) {
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return;
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}
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guestViewInternal.deregisterEvents(internal.viewInstanceId);
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internal.elementAttached = false;
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return internal.reset();
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};
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proto.attachedCallback = function() {
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var internal;
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internal = v8Util.getHiddenValue(this, 'internal');
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if (!internal) {
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return;
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}
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if (!internal.elementAttached) {
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guestViewInternal.registerEvents(internal, internal.viewInstanceId);
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internal.elementAttached = true;
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return internal.attributes[webViewConstants.ATTRIBUTE_SRC].parse();
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}
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};
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/* Public-facing API methods. */
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methods = ['getURL', 'getTitle', 'isLoading', 'isWaitingForResponse', 'stop', 'reload', 'reloadIgnoringCache', 'canGoBack', 'canGoForward', 'canGoToOffset', 'clearHistory', 'goBack', 'goForward', 'goToIndex', 'goToOffset', 'isCrashed', 'setUserAgent', 'getUserAgent', 'openDevTools', 'closeDevTools', 'isDevToolsOpened', 'isDevToolsFocused', 'inspectElement', 'setAudioMuted', 'isAudioMuted', 'undo', 'redo', 'cut', 'copy', 'paste', 'pasteAndMatchStyle', 'delete', 'selectAll', 'unselect', 'replace', 'replaceMisspelling', 'findInPage', 'stopFindInPage', 'getId', 'downloadURL', 'inspectServiceWorker', 'print', 'printToPDF'];
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nonblockMethods = [
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'executeJavaScript',
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'insertCSS',
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'insertText',
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'send',
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'sendInputEvent',
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'setZoomFactor',
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'setZoomLevel',
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'setZoomLevelLimits',
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];
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/* Forward proto.foo* method calls to WebViewImpl.foo*. */
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createBlockHandler = function(m) {
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return function() {
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var args, internal, ref1;
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args = 1 <= arguments.length ? slice.call(arguments, 0) : [];
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internal = v8Util.getHiddenValue(this, 'internal');
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return (ref1 = internal.webContents)[m].apply(ref1, args);
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};
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};
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for (i = 0, len = methods.length; i < len; i++) {
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m = methods[i];
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proto[m] = createBlockHandler(m);
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}
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createNonBlockHandler = function(m) {
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return function() {
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var args, internal;
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args = 1 <= arguments.length ? slice.call(arguments, 0) : [];
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internal = v8Util.getHiddenValue(this, 'internal');
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return ipcRenderer.send.apply(ipcRenderer, ['ATOM_BROWSER_ASYNC_CALL_TO_GUEST_VIEW', internal.guestInstanceId, m].concat(slice.call(args)));
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};
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};
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for (j = 0, len1 = nonblockMethods.length; j < len1; j++) {
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m = nonblockMethods[j];
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proto[m] = createNonBlockHandler(m);
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}
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/* Deprecated. */
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deprecate.rename(proto, 'getUrl', 'getURL');
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window.WebView = webFrame.registerEmbedderCustomElement('webview', {
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prototype: proto
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});
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/* Delete the callbacks so developers cannot call them and produce unexpected */
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/* behavior. */
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delete proto.createdCallback;
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delete proto.attachedCallback;
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delete proto.detachedCallback;
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return delete proto.attributeChangedCallback;
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};
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useCapture = true;
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listener = function(event) {
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if (document.readyState === 'loading') {
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return;
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}
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registerBrowserPluginElement();
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registerWebViewElement();
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return window.removeEventListener(event.type, listener, useCapture);
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};
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window.addEventListener('readystatechange', listener, true);
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module.exports = WebViewImpl;
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