From eb285af11ded3f5fef4cd434243976f4f269636c Mon Sep 17 00:00:00 2001
From: Daniel Imms <2193314+Tyriar@users.noreply.github.com>
Date: Tue, 23 Dec 2025 08:04:51 -0800
Subject: [PATCH] Add diagonal alignment tests

---
 demo/client.ts | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/demo/client.ts b/demo/client.ts
index b0598ed0..8845a010 100644
--- a/demo/client.ts
+++ b/demo/client.ts
@@ -1,4 +1,3 @@
-/* eslint-disable no-restricted-syntax */
 /**
  * Copyright (c) 2018 The xterm.js authors. All rights reserved.
  * @license MIT
@@ -8,6 +7,8 @@
 
 /// <reference path="../typings/xterm.d.ts"/>
 
+/* eslint-disable no-restricted-syntax */
+
 // HACK: Playwright/WebKit on Windows does not support WebAssembly https://stackoverflow.com/q/62311688/1156119
 import type { ImageAddon as ImageAddonType, IImageAddonOptions } from '@xterm/addon-image';
 let ImageAddon: typeof ImageAddonType | undefined; // eslint-disable-line @typescript-eslint/naming-convention
@@ -829,15 +830,27 @@ function customGlyphAlignmentHandler(): void {
   term.write('  ║└─╥─┘║  │╚═╤═╝│  │╘═╪═╛│  │╙─╀─╜│  ┃└─╂─┘┃  ░░▒▒▓▓██ ┊  ┆ ╎ ╏  ┇ ┋ ▏\n\r');
   term.write('  ╚══╩══╝  └──┴──┘  ╰──┴──╯  ╰──┴──╯  ┗━━┻━━┛           └╌╌┘ ╎ ┗╍╍┛ ┋  ▁▂▃▄▅▆▇█\n\r');
   term.write('\x1b[0mSmooth mosaic terminal graphic characters alignment tests:\x1b[33m\n\r');
-  term.write('🭇🬼 🭈🬽 🭉🬾 🭊🬿 🭋🭀 🭁🭌 🭂🭍 🭃🭎 🭄🭏 🭅🭐 🭆🭑 🭨🭪 🭩 🭯 🭮🭬\n\r');
-  term.write('🭢🭗 🭣🭘 🭤🭙 🭥🭚 🭦🭛 🭒🭝 🭓🭞 🭔🭟 🭕🭠 🭖🭡 🭧🭜    🭫 🭭\n\r');
-  term.write(' 🭇🬼              🭉🬾 🭋🭀\n\r');
-  term.write('🭊🭁🭌🬿 🭈🭆🭂🭍🭑🬽 🭇🭄🭏🬼 🭃🭎 🭅🭐 🭨🭪\n\r');
-  term.write('🭥🭒🭝🭚 🭣🭧🭓🭞🭜🭘 🭢🭕🭠🭗 🭔🭟 🭖🭡 🭪🭨\n\r');
-  term.write(' 🭢🭗              🭤🭙 🭦🭛\n\r');
-  term.write('\x1b[0mComposite terminal graphics characters:\x1b[34m\n\r');
+  term.write('  🭇🬼 🭈🬽 🭉🬾 🭊🬿 🭋🭀 🭁🭌 🭂🭍 🭃🭎 🭄🭏 🭅🭐 🭆🭑 🭨🭪 🭩 🭯 🭮🭬\n\r');
+  term.write('  🭢🭗 🭣🭘 🭤🭙 🭥🭚 🭦🭛 🭒🭝 🭓🭞 🭔🭟 🭕🭠 🭖🭡 🭧🭜    🭫 🭭\n\r');
+  term.write('   🭇🬼              🭉🬾 🭋🭀\n\r');
+  term.write('  🭊🭁🭌🬿 🭈🭆🭂🭍🭑🬽 🭇🭄🭏🬼 🭃🭎 🭅🭐 🭨🭪\n\r');
+  term.write('  🭥🭒🭝🭚 🭣🭧🭓🭞🭜🭘 🭢🭕🭠🭗 🭔🭟 🭖🭡 🭪🭨\n\r');
+  term.write('   🭢🭗              🭤🭙 🭦🭛\n\r');
+  term.write('\x1b[0mCharacter cell diagonals (1FBA0-1FBAE) alignment tests:\x1b[34m\n\r');
+  term.write('   \u{1FBA3}\u{1FBA7}\u{1FBA2}  \u{1FBA3}\u{1FBA8}\u{1FBA0} \u{1FBAD}\u{1FBA2} \u{1FBA3}\u{1FBAC} \u{1FBAE}\n\r');
+  term.write('  \u{1FBA3}\u{1FBA0} \u{1FBA1}\u{1FBA2} \u{1FBA1}\u{1FBA9}\u{1FBA2} \u{1FBA1}\u{1FBAA} \u{1FBAB}\u{1FBA0}\n\r');
+  term.write('  \u{1FBA4}   \u{1FBA5}\n\r');
+  term.write('  \u{1FBA1}\u{1FBA2} \u{1FBA3}\u{1FBA0}\n\r');
+  term.write('   \u{1FBA1}\u{1FBA6}\u{1FBA0}\n\r');
+  term.write('\x1b[0mCharacter cell diagonals (1FBD0-1FBDF) alignment tests:\x1b[34m\n\r');
+  term.write('  \u{1FBD6}\u{1FBD4} \u{1FBD0}\u{1FBD1}\u{1FBD2}\u{1FBD3} \u{1FBDA} \u{1FBD9}\u{1FBDB} \u{1FBDE} \u{1FBDD}\u{1FBDF}\n\r');
+  term.write('  \u{1FBD7}\u{1FBD5} \u{1FBD2}\u{1FBD3}\u{1FBD0}\u{1FBD1} \u{1FBD8}    \u{1FBDC}\n\r');
+  term.write('  \u{1FBD4}\u{1FBD6}\n\r');
+  term.write('  \u{1FBD5}\u{1FBD7}\n\r');
+  term.write('');
+  term.write('\x1b[0mComposite terminal graphics characters:\x1b[35m\n\r');
   term.write('\u{1FBB2}\u{1FBB3} \u{1FBB9}\u{1FBBA} \u{1FBC1}\u{1FBC2}\u{1FBC3}\n\r');
-  term.write('\x1b[0mFill tests:\x1b[35m\n\r');
+  term.write('\x1b[0mFill tests:\x1b[36m\n\r');
   const fillChars = ['\u{2591}', '\u{2592}', '\u{2593}', '\u{1FB8C}', '\u{1FB8D}', '\u{1FB8E}', '\u{1FB8F}', '\u{1FB90}', '\u{1FB91}', '\u{1FB92}', '\u{1FB94}', '\u{1FB95}', '\u{1FB96}', '\u{1FB97}', '\u{1FB98}', '\u{1FB99}'];
   while (fillChars.length > 0) {
     const batch = fillChars.splice(0, 10);