rope
5ad1ac06ca
Gecko has no userChrome.css reload, so wrap zen with a mozilla.cfg script that registers chrome/zen-theme.css through nsIStyleSheetService and re-registers it under a cache-busting URI when its mtime moves. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
65 lines
2.7 KiB
Nix
65 lines
2.7 KiB
Nix
#./apps/zen.nix
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{ inputs, pkgs, lib, config, ... }:
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let
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# Autoconfig (mozilla.cfg) runs privileged JS in the parent process at
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# startup — the only scriptable way into chrome, since Gecko has no reload
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# for userChrome.css and Zen exposes no command for one.
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#
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# So don't use userChrome.css at all for the wallpaper theme. Register
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# <profile>/chrome/zen-theme.css as a style-sheet-service USER_SHEET here
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# and re-register it under a cache-busting URI whenever its mtime moves —
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# that is what makes a `theme-apply` switch land in a running Zen
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# (settings/theming.nix writes that file on every switch). A separate file,
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# not userChrome.css: the legacy loader would hold its own copy of the same
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# sheet and the two would race on cascade order.
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themeHotReload = ''
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try {
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const { classes: kCc, interfaces: kCi } = Components;
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const sss = kCc["@mozilla.org/content/style-sheet-service;1"]
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.getService(kCi.nsIStyleSheetService);
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const file = Services.dirsvc.get("ProfD", kCi.nsIFile);
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file.append("chrome");
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file.append("zen-theme.css");
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const base = Services.io.newFileURI(file).spec;
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let live = null;
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const apply = () => {
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if (!file.exists()) return;
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// install(1) stamps the copy with the current time, so mtime alone
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// distinguishes one wallpaper's sheet from the next.
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const stamp = String(file.lastModifiedTime);
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if (stamp === live) return;
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// A fresh query string dodges the CSS loader's per-URI cache; without
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// it a re-register would hand back the sheet parsed at startup.
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sss.loadAndRegisterSheet(Services.io.newURI(base + "?" + stamp),
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sss.USER_SHEET);
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if (live !== null) {
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const old = Services.io.newURI(base + "?" + live);
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if (sss.sheetRegistered(old, sss.USER_SHEET))
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sss.unregisterSheet(old, sss.USER_SHEET);
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}
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live = stamp;
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};
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const timer = kCc["@mozilla.org/timer;1"].createInstance(kCi.nsITimer);
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// The observer service holds the only strong reference that keeps the
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// timer (and this closure) off the GC's list for the session.
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Services.obs.addObserver({ timer, observe() {} }, "quit-application");
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timer.initWithCallback({ notify: apply }, 2000,
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kCi.nsITimer.TYPE_REPEATING_SLACK);
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apply();
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} catch (e) {
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Components.utils.reportError(e);
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}
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'';
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in
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{
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config = lib.mkIf (lib.elem config.networking.hostName [ "FredOS-Gaming" "FredOS-Macbook" ]) {
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environment.systemPackages = [
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(inputs.zen-browser.packages.${pkgs.stdenv.hostPlatform.system}.default.override {
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extraPrefs = themeHotReload;
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})
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];
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};
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}
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