366 lines
13 KiB
JavaScript
366 lines
13 KiB
JavaScript
var AllowTransparencyAttribute, AutosizeAttribute, AutosizeDimensionAttribute, BooleanAttribute, HttpReferrerAttribute, PartitionAttribute, PreloadAttribute, SrcAttribute, UserAgentAttribute, WebViewAttribute, WebViewImpl, a, guestViewInternal, remote, resolveURL, webViewConstants,
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extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
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hasProp = {}.hasOwnProperty;
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WebViewImpl = require('./web-view');
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guestViewInternal = require('./guest-view-internal');
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webViewConstants = require('./web-view-constants');
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remote = require('electron').remote;
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// Helper function to resolve url set in attribute.
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a = document.createElement('a');
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resolveURL = function(url) {
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a.href = url;
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return a.href;
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};
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// Attribute objects.
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// Default implementation of a WebView attribute.
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WebViewAttribute = (function() {
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function WebViewAttribute(name, webViewImpl) {
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this.name = name;
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this.value = webViewImpl.webviewNode[name] || '';
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this.webViewImpl = webViewImpl;
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this.ignoreMutation = false;
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this.defineProperty();
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}
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// Retrieves and returns the attribute's value.
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WebViewAttribute.prototype.getValue = function() {
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return this.webViewImpl.webviewNode.getAttribute(this.name) || this.value;
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};
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// Sets the attribute's value.
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WebViewAttribute.prototype.setValue = function(value) {
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return this.webViewImpl.webviewNode.setAttribute(this.name, value || '');
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};
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// Changes the attribute's value without triggering its mutation handler.
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WebViewAttribute.prototype.setValueIgnoreMutation = function(value) {
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this.ignoreMutation = true;
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this.setValue(value);
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return this.ignoreMutation = false;
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};
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// Defines this attribute as a property on the webview node.
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WebViewAttribute.prototype.defineProperty = function() {
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return Object.defineProperty(this.webViewImpl.webviewNode, this.name, {
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get: (function(_this) {
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return function() {
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return _this.getValue();
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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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return _this.setValue(value);
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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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// Called when the attribute's value changes.
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WebViewAttribute.prototype.handleMutation = function() {};
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return WebViewAttribute;
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})();
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// An attribute that is treated as a Boolean.
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BooleanAttribute = (function(superClass) {
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extend(BooleanAttribute, superClass);
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function BooleanAttribute(name, webViewImpl) {
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BooleanAttribute.__super__.constructor.call(this, name, webViewImpl);
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}
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BooleanAttribute.prototype.getValue = function() {
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return this.webViewImpl.webviewNode.hasAttribute(this.name);
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};
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BooleanAttribute.prototype.setValue = function(value) {
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if (!value) {
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return this.webViewImpl.webviewNode.removeAttribute(this.name);
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} else {
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return this.webViewImpl.webviewNode.setAttribute(this.name, '');
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}
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};
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return BooleanAttribute;
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})(WebViewAttribute);
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// Attribute that specifies whether transparency is allowed in the webview.
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AllowTransparencyAttribute = (function(superClass) {
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extend(AllowTransparencyAttribute, superClass);
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function AllowTransparencyAttribute(webViewImpl) {
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AllowTransparencyAttribute.__super__.constructor.call(this, webViewConstants.ATTRIBUTE_ALLOWTRANSPARENCY, webViewImpl);
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}
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AllowTransparencyAttribute.prototype.handleMutation = function(oldValue, newValue) {
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if (!this.webViewImpl.guestInstanceId) {
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return;
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}
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return guestViewInternal.setAllowTransparency(this.webViewImpl.guestInstanceId, this.getValue());
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};
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return AllowTransparencyAttribute;
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})(BooleanAttribute);
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// Attribute used to define the demension limits of autosizing.
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AutosizeDimensionAttribute = (function(superClass) {
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extend(AutosizeDimensionAttribute, superClass);
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function AutosizeDimensionAttribute(name, webViewImpl) {
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AutosizeDimensionAttribute.__super__.constructor.call(this, name, webViewImpl);
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}
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AutosizeDimensionAttribute.prototype.getValue = function() {
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return parseInt(this.webViewImpl.webviewNode.getAttribute(this.name)) || 0;
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};
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AutosizeDimensionAttribute.prototype.handleMutation = function(oldValue, newValue) {
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if (!this.webViewImpl.guestInstanceId) {
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return;
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}
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return guestViewInternal.setSize(this.webViewImpl.guestInstanceId, {
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enableAutoSize: this.webViewImpl.attributes[webViewConstants.ATTRIBUTE_AUTOSIZE].getValue(),
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min: {
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width: parseInt(this.webViewImpl.attributes[webViewConstants.ATTRIBUTE_MINWIDTH].getValue() || 0),
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height: parseInt(this.webViewImpl.attributes[webViewConstants.ATTRIBUTE_MINHEIGHT].getValue() || 0)
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},
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max: {
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width: parseInt(this.webViewImpl.attributes[webViewConstants.ATTRIBUTE_MAXWIDTH].getValue() || 0),
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height: parseInt(this.webViewImpl.attributes[webViewConstants.ATTRIBUTE_MAXHEIGHT].getValue() || 0)
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}
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});
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};
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return AutosizeDimensionAttribute;
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})(WebViewAttribute);
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// Attribute that specifies whether the webview should be autosized.
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AutosizeAttribute = (function(superClass) {
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extend(AutosizeAttribute, superClass);
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function AutosizeAttribute(webViewImpl) {
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AutosizeAttribute.__super__.constructor.call(this, webViewConstants.ATTRIBUTE_AUTOSIZE, webViewImpl);
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}
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AutosizeAttribute.prototype.handleMutation = AutosizeDimensionAttribute.prototype.handleMutation;
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return AutosizeAttribute;
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})(BooleanAttribute);
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// Attribute representing the state of the storage partition.
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PartitionAttribute = (function(superClass) {
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extend(PartitionAttribute, superClass);
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function PartitionAttribute(webViewImpl) {
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PartitionAttribute.__super__.constructor.call(this, webViewConstants.ATTRIBUTE_PARTITION, webViewImpl);
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this.validPartitionId = true;
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}
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PartitionAttribute.prototype.handleMutation = function(oldValue, newValue) {
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newValue = newValue || '';
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// The partition cannot change if the webview has already navigated.
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if (!this.webViewImpl.beforeFirstNavigation) {
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window.console.error(webViewConstants.ERROR_MSG_ALREADY_NAVIGATED);
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this.setValueIgnoreMutation(oldValue);
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return;
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}
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if (newValue === 'persist:') {
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this.validPartitionId = false;
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return window.console.error(webViewConstants.ERROR_MSG_INVALID_PARTITION_ATTRIBUTE);
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}
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};
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return PartitionAttribute;
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})(WebViewAttribute);
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// Attribute that handles the location and navigation of the webview.
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SrcAttribute = (function(superClass) {
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extend(SrcAttribute, superClass);
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function SrcAttribute(webViewImpl) {
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SrcAttribute.__super__.constructor.call(this, webViewConstants.ATTRIBUTE_SRC, webViewImpl);
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this.setupMutationObserver();
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}
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SrcAttribute.prototype.getValue = function() {
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if (this.webViewImpl.webviewNode.hasAttribute(this.name)) {
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return resolveURL(this.webViewImpl.webviewNode.getAttribute(this.name));
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} else {
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return this.value;
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}
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};
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SrcAttribute.prototype.setValueIgnoreMutation = function(value) {
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WebViewAttribute.prototype.setValueIgnoreMutation.call(this, value);
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// takeRecords() is needed to clear queued up src mutations. Without it, it
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// is possible for this change to get picked up asyncronously by src's
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// mutation observer |observer|, and then get handled even though we do not
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// want to handle this mutation.
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return this.observer.takeRecords();
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};
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SrcAttribute.prototype.handleMutation = function(oldValue, newValue) {
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// Once we have navigated, we don't allow clearing the src attribute.
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// Once <webview> enters a navigated state, it cannot return to a
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// placeholder state.
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if (!newValue && oldValue) {
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// src attribute changes normally initiate a navigation. We suppress
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// the next src attribute handler call to avoid reloading the page
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// on every guest-initiated navigation.
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this.setValueIgnoreMutation(oldValue);
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return;
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}
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return this.parse();
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};
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// The purpose of this mutation observer is to catch assignment to the src
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// attribute without any changes to its value. This is useful in the case
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// where the webview guest has crashed and navigating to the same address
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// spawns off a new process.
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SrcAttribute.prototype.setupMutationObserver = function() {
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var params;
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this.observer = new MutationObserver((function(_this) {
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return function(mutations) {
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var i, len, mutation, newValue, oldValue;
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for (i = 0, len = mutations.length; i < len; i++) {
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mutation = mutations[i];
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oldValue = mutation.oldValue;
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newValue = _this.getValue();
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if (oldValue !== newValue) {
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return;
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}
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_this.handleMutation(oldValue, newValue);
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}
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};
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})(this));
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params = {
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attributes: true,
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attributeOldValue: true,
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attributeFilter: [this.name]
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};
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return this.observer.observe(this.webViewImpl.webviewNode, params);
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};
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SrcAttribute.prototype.parse = function() {
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var guestContents, httpreferrer, opts, useragent;
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if (!this.webViewImpl.elementAttached || !this.webViewImpl.attributes[webViewConstants.ATTRIBUTE_PARTITION].validPartitionId || !this.getValue()) {
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return;
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}
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if (this.webViewImpl.guestInstanceId == null) {
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if (this.webViewImpl.beforeFirstNavigation) {
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this.webViewImpl.beforeFirstNavigation = false;
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this.webViewImpl.createGuest();
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}
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return;
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}
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// Navigate to |this.src|.
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opts = {};
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httpreferrer = this.webViewImpl.attributes[webViewConstants.ATTRIBUTE_HTTPREFERRER].getValue();
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if (httpreferrer) {
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opts.httpReferrer = httpreferrer;
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}
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useragent = this.webViewImpl.attributes[webViewConstants.ATTRIBUTE_USERAGENT].getValue();
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if (useragent) {
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opts.userAgent = useragent;
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}
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guestContents = remote.getGuestWebContents(this.webViewImpl.guestInstanceId);
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return guestContents.loadURL(this.getValue(), opts);
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};
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return SrcAttribute;
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})(WebViewAttribute);
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// Attribute specifies HTTP referrer.
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HttpReferrerAttribute = (function(superClass) {
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extend(HttpReferrerAttribute, superClass);
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function HttpReferrerAttribute(webViewImpl) {
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HttpReferrerAttribute.__super__.constructor.call(this, webViewConstants.ATTRIBUTE_HTTPREFERRER, webViewImpl);
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}
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return HttpReferrerAttribute;
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})(WebViewAttribute);
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// Attribute specifies user agent
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UserAgentAttribute = (function(superClass) {
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extend(UserAgentAttribute, superClass);
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function UserAgentAttribute(webViewImpl) {
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UserAgentAttribute.__super__.constructor.call(this, webViewConstants.ATTRIBUTE_USERAGENT, webViewImpl);
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}
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return UserAgentAttribute;
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})(WebViewAttribute);
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// Attribute that set preload script.
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PreloadAttribute = (function(superClass) {
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extend(PreloadAttribute, superClass);
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function PreloadAttribute(webViewImpl) {
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PreloadAttribute.__super__.constructor.call(this, webViewConstants.ATTRIBUTE_PRELOAD, webViewImpl);
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}
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PreloadAttribute.prototype.getValue = function() {
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var preload, protocol;
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if (!this.webViewImpl.webviewNode.hasAttribute(this.name)) {
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return this.value;
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}
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preload = resolveURL(this.webViewImpl.webviewNode.getAttribute(this.name));
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protocol = preload.substr(0, 5);
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if (protocol !== 'file:') {
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console.error(webViewConstants.ERROR_MSG_INVALID_PRELOAD_ATTRIBUTE);
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preload = '';
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}
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return preload;
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};
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return PreloadAttribute;
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})(WebViewAttribute);
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// Sets up all of the webview attributes.
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WebViewImpl.prototype.setupWebViewAttributes = function() {
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var attribute, autosizeAttributes, i, len, results;
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this.attributes = {};
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this.attributes[webViewConstants.ATTRIBUTE_ALLOWTRANSPARENCY] = new AllowTransparencyAttribute(this);
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this.attributes[webViewConstants.ATTRIBUTE_AUTOSIZE] = new AutosizeAttribute(this);
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this.attributes[webViewConstants.ATTRIBUTE_PARTITION] = new PartitionAttribute(this);
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this.attributes[webViewConstants.ATTRIBUTE_SRC] = new SrcAttribute(this);
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this.attributes[webViewConstants.ATTRIBUTE_HTTPREFERRER] = new HttpReferrerAttribute(this);
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this.attributes[webViewConstants.ATTRIBUTE_USERAGENT] = new UserAgentAttribute(this);
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this.attributes[webViewConstants.ATTRIBUTE_NODEINTEGRATION] = new BooleanAttribute(webViewConstants.ATTRIBUTE_NODEINTEGRATION, this);
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this.attributes[webViewConstants.ATTRIBUTE_PLUGINS] = new BooleanAttribute(webViewConstants.ATTRIBUTE_PLUGINS, this);
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this.attributes[webViewConstants.ATTRIBUTE_DISABLEWEBSECURITY] = new BooleanAttribute(webViewConstants.ATTRIBUTE_DISABLEWEBSECURITY, this);
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this.attributes[webViewConstants.ATTRIBUTE_ALLOWPOPUPS] = new BooleanAttribute(webViewConstants.ATTRIBUTE_ALLOWPOPUPS, this);
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this.attributes[webViewConstants.ATTRIBUTE_PRELOAD] = new PreloadAttribute(this);
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autosizeAttributes = [webViewConstants.ATTRIBUTE_MAXHEIGHT, webViewConstants.ATTRIBUTE_MAXWIDTH, webViewConstants.ATTRIBUTE_MINHEIGHT, webViewConstants.ATTRIBUTE_MINWIDTH];
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results = [];
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for (i = 0, len = autosizeAttributes.length; i < len; i++) {
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attribute = autosizeAttributes[i];
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results.push(this.attributes[attribute] = new AutosizeDimensionAttribute(attribute, this));
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}
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return results;
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};
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