Content-only RTL: p/li/blockquote + spans in content areas. First alphabetic char decides. Ultra-light (IO/MO/RAF). Per-domain toggle (OFF by default). Ctrl+Alt+R hotkey. Tiny, transparent edge toggle near scrollbar.
// ==UserScript==
// @name Auto-RTL
// @namespace https://greasyfork.org/en/users/1374110-momo21798
// @version 0.4.3
// @description Content-only RTL: p/li/blockquote + spans in content areas. First alphabetic char decides. Ultra-light (IO/MO/RAF). Per-domain toggle (OFF by default). Ctrl+Alt+R hotkey. Tiny, transparent edge toggle near scrollbar.
// @author Momo
// @match *://*/*
// @run-at document-idle
// @grant none
// @license MIT
// ==/UserScript==
(() => {
'use strict';
// ---------- Config ----------
const RTL_CLASS = 'rtl-first-alpha-ar';
const UI_ID = 'rtl-first-alpha-toggle';
const STYLE_ID = 'rtl-first-alpha-style';
const DOMAIN_KEY = (host) => `rtl-first-alpha:domain:${host}`; // per-domain state
const host = location.hostname;
// Content containers (safe defaults; extend as needed)
const CONTENT_SELECTORS = [
'main', 'article', '[role="main"]', '[role="article"]',
'.content', '.post', '.entry', '.article', '.story', '.note', '.prose', '.markdown-body',
'#content', '#main',
// Substack helpers (harmless elsewhere)
'.feedCommentBody-UWho7S', '[class*="feedCommentBody-"]', '[data-testid="note-body"]'
];
// Elements to target inside content
const TARGET_TAGS = new Set(['P', 'LI', 'BLOCKQUOTE', 'SPAN']);
// Skip inside these (avoid nav/buttons/labels/inputs/etc.)
const SKIP_ANCESTOR = 'a, button, [role="button"], [role="link"], nav, header, footer, aside, [contenteditable="true"], input, textarea, select, label';
// ---------- Persistence ----------
const getDomainState = () => localStorage.getItem(DOMAIN_KEY(host)) ?? 'off'; // default OFF globally
const setDomainState = (state) => localStorage.setItem(DOMAIN_KEY(host), state);
const isOn = () => getDomainState() === 'on';
// ---------- Styles (toggle is tiny, elegant, transparent) ----------
const STYLES = `
.${RTL_CLASS} {
direction: rtl !important;
unicode-bidi: plaintext !important;
text-align: justify !important;
text-align-last: right;
}
.${RTL_CLASS} * {
direction: inherit !important;
unicode-bidi: inherit !important;
text-align: inherit !important;
}
/* tiny pill toggle near scrollbar, mid-right */
#${UI_ID} {
position: fixed;
top: 50%;
right: 6px;
transform: translateY(-50%);
z-index: 2147483646;
width: 38px;
height: 20px;
border-radius: 999px;
background: rgba(20,20,20,.25);
box-shadow: 0 2px 8px rgba(0,0,0,.15);
backdrop-filter: blur(2px);
-webkit-backdrop-filter: blur(2px);
display: inline-flex;
align-items: center;
padding: 2px;
cursor: pointer;
opacity: .22;
transition: opacity .18s ease, background .18s ease, box-shadow .18s ease, transform .18s ease;
outline: none;
}
#${UI_ID}:hover { opacity: .95; background: rgba(20,20,20,.65); }
#${UI_ID}:active { transform: translateY(-50%) scale(0.98); }
#${UI_ID}.on { background: rgba(9,140,110,.55); }
#${UI_ID}.on:hover { background: rgba(9,140,110,.75); }
#${UI_ID} .knob {
width: 16px; height: 16px; border-radius: 50%;
background: #fff;
box-shadow: 0 1px 2px rgba(0,0,0,.4);
transform: translateX(0);
transition: transform .18s ease;
}
#${UI_ID}.on .knob { transform: translateX(18px); }
/* Focus ring for keyboard users */
#${UI_ID}:focus-visible {
box-shadow: 0 0 0 2px rgba(255,255,255,.9), 0 0 0 5px rgba(20,20,20,.6);
opacity: .98;
}
/* Keep clear of notches / overlay scrollbars */
@supports (env(safe-area-inset-right: 0)) {
#${UI_ID} { right: calc(6px + env(safe-area-inset-right)); }
}
/* optional: avoid hover opacity bump on small touch devices */
@media (hover: none) and (pointer: coarse) {
#${UI_ID} { opacity: .6; }
}
`;
// ---------- Unicode helpers ----------
let LETTER_RE, ARABIC_LETTER_RE;
try {
LETTER_RE = /\p{L}/u; // any Unicode letter
ARABIC_LETTER_RE = /^\p{Script=Arabic}$/u; // Arabic-script letter
} catch {
LETTER_RE = /[A-Za-z\u00C0-\u02AF\u0370-\u03FF\u0400-\u052F\u0531-\u058F\u10A0-\u10FF\u1E00-\u1EFF\u2C00-\u2C7F\uA720-\uA7FF\u0590-\u05FF\u0600-\u06FF\u0750-\u077F\u08A0-\u08FF]/;
ARABIC_LETTER_RE = /^[\u0600-\u06FF\u0750-\u077F\u08A0-\u08FF]$/;
}
const stripInvisibles = (s) => s.replace(/[\u200E\u200F\u061C\u200B-\u200D\u2066-\u2069]/g, '');
const firstAlphabetic = (s) => {
if (!s) return '';
const t = stripInvisibles(s).normalize('NFC');
const m = t.match(LETTER_RE);
return m ? m[0] : '';
};
const shouldBeRTL = (el) => {
const t = el.textContent || '';
const ch = firstAlphabetic(t);
return ch ? ARABIC_LETTER_RE.test(ch) : false;
};
// ---------- Utilities ----------
const debounce = (fn, ms = 120) => { let id; return (...a) => { clearTimeout(id); id = setTimeout(() => fn(...a), ms); }; };
const isInContentContainer = (el) => !!el.closest(CONTENT_SELECTORS.join(','));
const shouldSkipEl = (el) => {
if (!TARGET_TAGS.has(el.tagName)) return true;
if (el.closest(SKIP_ANCESTOR)) return true;
if (el.closest('pre, code, [data-code-block], .code, .hljs')) return true;
if (!isInContentContainer(el)) return true;
return false;
};
// ---------- Observers + Work Queue ----------
const seen = new WeakSet();
const queue = new Set();
let rafId = 0;
const processEl = (el) => {
if (!el.isConnected) return;
if (!isOn()) { el.classList.remove(RTL_CLASS); return; }
if (!seen.has(el)) {
seen.add(el);
if (shouldBeRTL(el)) el.classList.add(RTL_CLASS);
else el.classList.remove(RTL_CLASS);
}
};
const kickWork = () => {
if (rafId) return;
rafId = requestAnimationFrame(() => {
rafId = 0;
let count = 0, MAX = 250;
for (const el of queue) {
queue.delete(el);
processEl(el);
if (++count >= MAX) break;
}
if (queue.size) kickWork();
});
};
// Viewport observer (preloads ~600px ahead)
const io = new IntersectionObserver((entries) => {
if (!isOn()) return;
for (const e of entries) if (e.isIntersecting) queue.add(e.target);
kickWork();
}, { root: null, rootMargin: '600px 0px', threshold: 0 });
const observeEl = (el) => { if (!shouldSkipEl(el)) io.observe(el); };
const observeExisting = () => {
const rootSel = CONTENT_SELECTORS.join(',');
document.querySelectorAll(rootSel).forEach(root => {
root.querySelectorAll('p, li, blockquote, span').forEach(observeEl);
});
};
const mo = new MutationObserver((muts) => {
let touched = false;
for (const m of muts) {
if (m.type === 'childList') {
m.addedNodes.forEach(n => {
if (n.nodeType !== 1) return;
if (n.matches?.(CONTENT_SELECTORS.join(','))) {
n.querySelectorAll('p, li, blockquote, span').forEach(observeEl);
touched = true;
}
n.querySelectorAll?.('p, li, blockquote, span').forEach((el) => {
if (!shouldSkipEl(el)) { observeEl(el); touched = true; }
});
if (n.matches?.('p, li, blockquote, span') && !shouldSkipEl(n)) { observeEl(n); touched = true; }
});
} else if (m.type === 'characterData') {
const el = m.target.parentElement?.closest?.('p, li, blockquote, span');
if (el && !shouldSkipEl(el)) { seen.delete(el); observeEl(el); queue.add(el); touched = true; }
}
}
if (touched) kickWork();
});
// ---------- UI (tiny pill toggle) ----------
const ensureStyle = () => {
if (!document.getElementById(STYLE_ID)) {
const st = document.createElement('style');
st.id = STYLE_ID;
st.textContent = STYLES;
document.head.appendChild(st);
}
};
const updateUIButton = (btn) => {
const on = isOn();
btn.classList.toggle('on', on);
btn.setAttribute('aria-checked', String(on));
btn.setAttribute('title', `RTL auto-detect is ${on ? 'ON' : 'OFF'} — Ctrl+Alt+R`);
};
const ensureUI = () => {
if (document.getElementById(UI_ID)) return;
const btn = document.createElement('button');
btn.id = UI_ID;
btn.type = 'button';
btn.setAttribute('role', 'switch');
btn.setAttribute('aria-label', 'Toggle Arabic/Persian RTL auto-detect for this domain');
btn.innerHTML = '<span class="knob" aria-hidden="true"></span>';
updateUIButton(btn);
const toggle = () => {
const state = isOn() ? 'off' : 'on';
setDomainState(state);
updateUIButton(btn);
if (state === 'on') refreshAll(); else clearAll();
};
btn.addEventListener('click', (e) => { e.preventDefault(); toggle(); });
btn.addEventListener('keydown', (e) => {
if (e.key === ' ' || e.key === 'Enter') { e.preventDefault(); toggle(); }
});
document.documentElement.appendChild(btn);
};
// ---------- Controls ----------
const clearAll = () => {
queue.clear();
document.querySelectorAll(`.${RTL_CLASS}`).forEach(el => el.classList.remove(RTL_CLASS));
};
const refreshAll = () => {
queue.clear();
observeExisting();
kickWork();
};
const hookHistory = () => {
const wrap = (fn) => function () { const r = fn.apply(this, arguments); onNav(); return r; };
const onNav = debounce(() => { if (isOn()) refreshAll(); }, 80);
history.pushState = wrap(history.pushState);
history.replaceState = wrap(history.replaceState);
window.addEventListener('popstate', onNav);
};
const onHotkey = (e) => {
if (e.ctrlKey && e.altKey && (e.key === 'r' || e.key === 'R')) {
e.preventDefault();
const state = isOn() ? 'off' : 'on';
setDomainState(state);
const btn = document.getElementById(UI_ID);
if (btn) updateUIButton(btn);
if (state === 'on') refreshAll(); else clearAll();
}
};
// ---------- Init ----------
const init = () => {
if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', init, { once: true }); return; }
ensureStyle();
ensureUI();
observeExisting();
mo.observe(document.body || document.documentElement, { childList: true, subtree: true, characterData: true });
hookHistory();
if (isOn()) kickWork();
window.addEventListener('keydown', onHotkey, true);
};
init();
})();