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// ==UserScript==
// @name Loading indicator
// @version 1.0
// @description Loading indicator for the url bar
// @startup UC.loadingIndicator.init(win)
// @shutdown UC.loadingIndicator.destroy()
// ==/UserScript==
(() => {
const ENABLED = true;
class TabProgressListener {
static instances = [];
static createListener(tab, onStateChange) {
const oldListener = TabProgressListener.instances.find(l => l.tab === tab)
if (oldListener) return oldListener;
const listener = new TabProgressListener(tab, onStateChange);
TabProgressListener.instances.push(listener);
listener.attach();
return listener;
}
static cleanup() {
TabProgressListener.instances.forEach(l => l.cleanup())
}
loadedPercentage = 0;
constructor(tab, onStateChange) {
this.tab = tab;
this._stateChange = onStateChange;
}
attach() {
const browser = this.tab.linkedBrowser;
browser.webProgress.addProgressListener(this, Ci.nsIWebProgress.NOTIFY_ALL)
}
cleanup() {
try {
const index = TabProgressListener.instances.indexOf(this);
if (index !== -1)
TabProgressListener.instances.splice(index, 1);
} finally {
this.tab.linkedBrowser.webProgress.removeProgressListener(this);
}
}
// Start query listener methods
QueryInterface = ChromeUtils.generateQI(['nsIWebProgressListener', 'nsISupportsWeakReference'])
onStateChange(_webProgress, _request, stateFlags, _status) {
if (stateFlags & Ci.nsIWebProgressListener.STATE_START) {
this._stateChange?.('loading');
} else if (stateFlags & Ci.nsIWebProgressListener.STATE_STOP) {
this._stateChange?.('loaded');
}
}
}
const module = {
onProgressStateUpdate: (win, state) => {
/** @type {HTMLElement} */
const urlBar = win.gURLBar.textbox;
// console.log(state, urlBar);
if (!urlBar) return;
// urlBar.style.setProperty('--ff-urlbar-progress', perc);
urlBar.dataset.pageProgress = state;
},
setupTab: (tab, win) => {
const listener = TabProgressListener.createListener(tab, (state) => module.onProgressStateUpdate(win, state));
tab.addEventListener('TabClose', () => listener.cleanup());
},
setupWindow: win => {
win.gBrowser.tabs.forEach(tab => module.setupTab(tab, win));
win.gBrowser.tabContainer.addEventListener('TabOpen', event => {
module.setupTab(event.target, win);
});
win.gBrowser.tabContainer.addEventListener('TabSelect', _event => {
const isLoading = gBrowser.selectedTab.linkedBrowser.webProgress.isLoadingDocument
module.onProgressStateUpdate(win, isLoading ? 'loading' : 'loaded');
});
},
init(win) {
if (!ENABLED) return;
const handle = () => {
Services.obs.removeObserver(handle, 'browser-window-before-show');
module.setupWindow(win);
}
if (win.__SSi) handle();
else Services.obs.addObserver(handle, 'browser-window-before-show');
},
destroy() {
TabProgressListener.cleanup();
},
};
UC.loadingIndicator = module;
})()
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