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/* 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
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
BackgroundPageThumbs: "resource://gre/modules/BackgroundPageThumbs.sys.mjs",
PageThumbs: "resource://gre/modules/PageThumbs.sys.mjs",
});
ChromeUtils.defineLazyGetter(lazy, "console", () =>
console.createInstance({
prefix: "HistoryThumbnails",
maxLogLevelPref: "browser.smartwindow.conversation.logLevel",
})
);
/**
* Captures (or reuses a disk-cached) page thumbnail for an og:image URL and
*
* Uses BackgroundPageThumbs so captures are cached on disk and reused across
* conversations. Must run in the parent process.
*
* @param {string} thumbnail an og:image url
* @returns {Promise<string|null>}
* URL, the capture threw, or the cached file is the empty-failure marker.
*/
export async function captureThumbnail(thumbnail) {
if (!thumbnail) {
return null;
}
try {
await lazy.BackgroundPageThumbs.captureIfMissing(thumbnail, {
isImage: true,
backgroundColor: "#F9F9FA",
settleWaitTime: 0,
timeout: 10000,
});
const path = lazy.PageThumbs.getThumbnailPath(thumbnail);
const { size } = await IOUtils.stat(path);
if (size > 0) {
return lazy.PageThumbs.getThumbnailURL(thumbnail);
}
} catch (err) {
lazy.console.warn(`History image capture failed for ${thumbnail}`, err);
}
return null;
}