gecko-dev/toolkit/actors/ThumbnailsChild.jsm

67 строки
2.4 KiB
JavaScript

/* vim: set ts=2 sw=2 sts=2 et tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
var EXPORTED_SYMBOLS = ["ThumbnailsChild"];
ChromeUtils.import("resource://gre/modules/ActorChild.jsm");
ChromeUtils.import("resource://gre/modules/Services.jsm");
ChromeUtils.defineModuleGetter(this, "PageThumbUtils",
"resource://gre/modules/PageThumbUtils.jsm");
class ThumbnailsChild extends ActorChild {
receiveMessage(message) {
if (message.name == "Browser:Thumbnail:Request") {
/**
* Remote thumbnail request handler for PageThumbs thumbnails.
*/
let snapshot;
let args = message.data.additionalArgs;
let fullScale = args ? args.fullScale : false;
if (fullScale) {
snapshot = PageThumbUtils.createSnapshotThumbnail(this.content, null, args);
} else {
let snapshotWidth = message.data.canvasWidth;
let snapshotHeight = message.data.canvasHeight;
snapshot =
PageThumbUtils.createCanvas(this.content, snapshotWidth, snapshotHeight);
PageThumbUtils.createSnapshotThumbnail(this.content, snapshot, args);
}
snapshot.toBlob((aBlob) => {
this.mm.sendAsyncMessage("Browser:Thumbnail:Response", {
thumbnail: aBlob,
id: message.data.id,
});
});
} else if (message.name == "Browser:Thumbnail:CheckState") {
/**
* Remote isSafeForCapture request handler for PageThumbs.
*/
Services.tm.idleDispatchToMainThread(() => {
let result = PageThumbUtils.shouldStoreContentThumbnail(this.content, this.mm.docShell);
this.mm.sendAsyncMessage("Browser:Thumbnail:CheckState:Response", {
result,
});
});
} else if (message.name == "Browser:Thumbnail:GetOriginalURL") {
/**
* Remote GetOriginalURL request handler for PageThumbs.
*/
let channel = this.mm.docShell.currentDocumentChannel;
let channelError = PageThumbUtils.isChannelErrorResponse(channel);
let originalURL;
try {
originalURL = channel.originalURI.spec;
} catch (ex) {}
this.mm.sendAsyncMessage("Browser:Thumbnail:GetOriginalURL:Response", {
channelError,
originalURL,
});
}
}
}