1/* vim: set ts=2 sw=2 sts=2 et tw=80: */ 2/* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5"use strict"; 6 7var EXPORTED_SYMBOLS = ["ThumbnailsChild"]; 8const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm"); 9 10ChromeUtils.defineModuleGetter( 11 this, 12 "PageThumbUtils", 13 "resource://gre/modules/PageThumbUtils.jsm" 14); 15 16class ThumbnailsChild extends JSWindowActorChild { 17 receiveMessage(message) { 18 switch (message.name) { 19 case "Browser:Thumbnail:ContentInfo": { 20 let [width, height] = PageThumbUtils.getContentSize(this.contentWindow); 21 return { width, height }; 22 } 23 case "Browser:Thumbnail:CheckState": { 24 /** 25 * Remote isSafeForCapture request handler for PageThumbs. 26 */ 27 return new Promise(resolve => 28 Services.tm.idleDispatchToMainThread(() => { 29 if (!this.manager) { 30 // If we have no manager, our actor has been destroyed, which 31 // means we can't respond, and trying to touch 32 // `this.contentWindow` or `this.browsingContext` will throw. 33 // The `sendQuery` call in the parent will already have been 34 // rejected when the actor was destroyed, so there's no need to 35 // reject our promise or log an additional error. 36 return; 37 } 38 39 let result = PageThumbUtils.shouldStoreContentThumbnail( 40 this.contentWindow, 41 this.browsingContext.docShell 42 ); 43 resolve(result); 44 }) 45 ); 46 } 47 case "Browser:Thumbnail:GetOriginalURL": { 48 /** 49 * Remote GetOriginalURL request handler for PageThumbs. 50 */ 51 let channel = this.browsingContext.docShell.currentDocumentChannel; 52 let channelError = PageThumbUtils.isChannelErrorResponse(channel); 53 let originalURL; 54 try { 55 originalURL = channel.originalURI.spec; 56 } catch (ex) {} 57 return { channelError, originalURL }; 58 } 59 } 60 return undefined; 61 } 62} 63