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// Copyright Epic Games, Inc. All Rights Reserved.
// Theme toggle: cycles system → light → dark → system.
// Persists choice in localStorage. Applies data-theme attribute on <html>.
(function() {
// Wrap localStorage so a single key's get/set/clear all swallow the
// SecurityError that fires in private-mode / cookies-disabled browsers.
// `clear` removes the key entirely (used for theme to reset to system
// preference); `set` stores the raw value passed (callers serialize).
function safeStorage(key) {
return {
get: function() {
try { return localStorage.getItem(key); } catch (e) { return null; }
},
set: function(value) {
try { localStorage.setItem(key, value); } catch (e) {}
},
clear: function() {
try { localStorage.removeItem(key); } catch (e) {}
},
};
}
var themeStore = safeStorage('zen-theme');
function apply(theme) {
if (theme)
document.documentElement.setAttribute('data-theme', theme);
else
document.documentElement.removeAttribute('data-theme');
}
function getEffective(stored) {
if (stored) return stored;
return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
}
// Apply stored preference immediately (before paint)
apply(themeStore.get());
// Wide-mode preference: persisted across sessions, applied before paint
// so the layout doesn't flash at the default width on reload. Lifts the
// 1400px #container cap and the body's horizontal padding so the main
// content fills the viewport edge-to-edge.
var wideStore = safeStorage('zen-wide');
function getWide() { return wideStore.get() === 'true'; }
function setWide(value) {
if (value) wideStore.set('true');
else wideStore.clear();
}
function applyWide(wide) {
if (wide) document.documentElement.setAttribute('data-wide', 'true');
else document.documentElement.removeAttribute('data-wide');
}
applyWide(getWide());
// Double-chevron SVGs for the wide toggle — outward when content is
// narrow (click to fill the viewport), inward when wide (click to snap
// back to the 1400px cap). currentColor so button styles tint it.
var ICON_WIDEN = '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><polyline points="8 6 2 12 8 18"/><polyline points="16 6 22 12 16 18"/></svg>';
var ICON_NARROW = '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><polyline points="4 6 10 12 4 18"/><polyline points="20 6 14 12 20 18"/></svg>';
// Create toggle button once DOM is ready
function createToggle() {
var btn = document.createElement('button');
btn.id = 'zen_theme_toggle';
btn.className = 'zen-floating-toggle';
btn.title = 'Toggle theme';
function updateIcon() {
var effective = getEffective(themeStore.get());
// Show sun in dark mode (click to go light), moon in light mode (click to go dark)
btn.textContent = effective === 'dark' ? '\u2600' : '\u263E';
var isManual = themeStore.get() != null;
btn.title = isManual
? 'Theme: ' + effective + ' (click to change, double-click for system)'
: 'Theme: system (click to change)';
}
btn.addEventListener('click', function() {
var effective = getEffective(themeStore.get());
// Toggle to the opposite
var next = effective === 'dark' ? 'light' : 'dark';
themeStore.set(next);
apply(next);
updateIcon();
});
btn.addEventListener('dblclick', function(e) {
e.preventDefault();
// Reset to system preference
themeStore.clear();
apply(null);
updateIcon();
});
// Update icon when system preference changes
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', function() {
if (!themeStore.get()) updateIcon();
});
updateIcon();
document.body.appendChild(btn);
// WebSocket pause/play toggle
var wsStore = safeStorage('zen-ws-paused');
var wsBtn = document.createElement('button');
wsBtn.id = 'zen_ws_toggle';
wsBtn.className = 'zen-floating-toggle';
var initialPaused = wsStore.get() === 'true';
function updateWsIcon(paused) {
wsBtn.dataset.paused = paused ? 'true' : 'false';
wsBtn.textContent = paused ? '\u25B6' : '\u23F8';
wsBtn.title = paused ? 'Resume live updates' : 'Pause live updates';
}
updateWsIcon(initialPaused);
// No initial event is dispatched: createToggle runs at (or after)
// DOMContentLoaded, so any listener gated on DOMContentLoaded would
// not fire. Page scripts read localStorage('zen-ws-paused') directly
// for their initial paused state and subscribe to zen-ws-toggle for
// subsequent transitions.
wsBtn.addEventListener('click', function() {
var paused = wsBtn.dataset.paused !== 'true';
wsStore.set(paused ? 'true' : 'false');
updateWsIcon(paused);
document.dispatchEvent(new CustomEvent('zen-ws-toggle', { detail: { paused: paused } }));
});
document.body.appendChild(wsBtn);
// Wide-mode toggle. Sits to the left of the pause and theme toggles.
var wideBtn = document.createElement('button');
wideBtn.id = 'zen_wide_toggle';
wideBtn.className = 'zen-floating-toggle';
function updateWideIcon(wide) {
wideBtn.dataset.wide = wide ? 'true' : 'false';
wideBtn.innerHTML = wide ? ICON_NARROW : ICON_WIDEN;
wideBtn.title = wide ? 'Narrow the main content' : 'Fill the viewport width';
wideBtn.setAttribute('aria-label', wide ? 'Narrow content' : 'Widen content');
}
updateWideIcon(getWide());
wideBtn.addEventListener('click', function() {
var wide = !getWide();
setWide(wide);
applyWide(wide);
updateWideIcon(wide);
});
document.body.appendChild(wideBtn);
}
if (document.readyState === 'loading')
document.addEventListener('DOMContentLoaded', createToggle);
else
createToggle();
})();
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