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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const { TabUnloader } = ChromeUtils.importESModule(
"resource:///modules/TabUnloader.sys.mjs"
);
async function refreshData() {
const sortedTabs = await TabUnloader.getSortedTabs(null);
const tabTable = document.querySelector(".tab-table > tbody");
const getHost = uri => {
try {
return uri?.host;
} catch (e) {
return uri?.spec;
}
};
const updateTimestamp = () => {
document.l10n.setAttributes(
document.getElementById("label-last-updated"),
"about-unloads-last-updated",
{ date: Date.now() }
);
};
// Reset the table
// Don't delete the first row showing the "no unloadable tab" message
while (tabTable.rows.length > 1) {
tabTable.deleteRow(1);
}
if (!sortedTabs.length) {
document.getElementById("button-unload").disabled = true;
document.getElementById("no-unloadable-tab-message").hidden = false;
updateTimestamp();
return;
}
document.getElementById("button-unload").disabled =
!TabUnloader.isDiscardable(sortedTabs[0]);
document.getElementById("no-unloadable-tab-message").hidden = true;
const fragmentRows = new DocumentFragment();
const templateRow = document.querySelector("template[name=tab-table-row]");
let ordinal = 0;
for (const tabInfo of sortedTabs) {
if (!("tab" in tabInfo)) {
continue;
}
const fragment = templateRow.content.cloneNode(true);
const row = fragment.querySelector("tr");
row.children[0].textContent = TabUnloader.isDiscardable(tabInfo)
? ++ordinal
: "-";
row.children[1].textContent = getHost(
tabInfo.tab?.linkedBrowser?.currentURI
);
if ("lastAccessed" in tabInfo.tab) {
document.l10n.setAttributes(
row.children[2],
"about-unloads-last-accessed",
{ date: tabInfo.tab.lastAccessed }
);
}
row.children[3].textContent = tabInfo.weight;
row.children[4].textContent = tabInfo.sortWeight;
if ("memory" in tabInfo) {
document.l10n.setAttributes(
row.children[5],
"about-unloads-memory-in-mb",
{ mem: tabInfo.memory / 1024 / 1024 }
);
}
if (tabInfo.processes) {
for (const [pid, procEntry] of tabInfo.processes) {
if (pid < 0) {
// Tab is hosted by the main process
continue;
}
const procLabel = document.createElement("span");
const procInfo = procEntry.entryToProcessMap;
if (procEntry.isTopLevel) {
procLabel.classList.add("top-level-process");
}
if (procInfo.tabSet.size > 1) {
procLabel.classList.add("shared-process");
}
procLabel.textContent = pid;
document.l10n.setAttributes(
procLabel,
"about-unloads-memory-in-mb-tooltip",
{ mem: procInfo.memory / 1024 / 1024 }
);
row.children[6].appendChild(procLabel);
row.children[6].appendChild(document.createTextNode(" "));
}
}
fragmentRows.appendChild(fragment);
}
tabTable.appendChild(fragmentRows);
updateTimestamp();
}
async function onLoad() {
document
.getElementById("button-unload")
.addEventListener("click", async () => {
await TabUnloader.unloadLeastRecentlyUsedTab(null);
await refreshData();
});
await refreshData();
}
try {
document.addEventListener("DOMContentLoaded", onLoad, { once: true });
} catch (ex) {
console.error(ex);
}
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