ghostty/TODO.md

Bugs:

• Underline should use freetype underline thickness hint

Performance:

• libuv allocates on every read, we should use a read buffer pool
• update cells should only update the changed cells
• for scrollback, investigate using segmented list for sufficiently large scrollback scenarios.
• scrollback: dynamic growth rather than prealloc
• reflow: text reflow is really poorly implemented right now specifically for shrinking columns. Look into this. This may require changing the screen data structure.

Correctness:

• exit in the shell should close the window
• test wrap against wraptest: https://github.com/mattiase/wraptest
  • automate this in some way
• Charsets: UTF-8 vs. ASCII mode
  • we only support UTF-8 input right now
  • need fallback glyphs if they're not supported
  • can effect a crash using vttest menu 3 10 since it tries to parse ASCII as UTF-8.

Improvements:

• scrollback: configurable
• selection on top/bottom should scroll up/down (while extending selection)
• double-click to select a word
• triple-click to select a line
• shift-click and drag to continue selection

Major Features:

• Strikethrough
• Ligatures
• Bell
• Mac:
  • Switch to raw Cocoa and Metal instead of glfw and libuv (major!)
• Sixels: https://saitoha.github.io/libsixel/
• Kitty keyboard protocol: https://sw.kovidgoyal.net/kitty/keyboard-protocol/
• Kitty graphics protocol: https://sw.kovidgoyal.net/kitty/graphics-protocol/