crib/TODO.md

Copyright 2025 Syed Daanish

TODO

Critical Fixes

• Critical Crash: Fix bug where closing immediately while LSP is still loading hangs and then segfaults (especially on slow ones like fish-lsp).
• Navigation Bug: Fix bug where Alt+Up at EOF adds an extra line.
• LSP Bug: Check why fish-lsp is behaving so off with completions filtering.
• File IO: Normalize/validate unicode on file open (enforce UTF-8, handle other types gracefully).

Core Editing Mechanics

• Undo/Redo: Add support for undo/redo history.

• Indentation Engine (Major Task):

  • Startup:
    1. Scan file: Check for lines with 2+ spaces. Least count = indent. If tabs, use tabs.
    2. Fallback: Use table of file types or default to 2 spaces.
    3. Store as: 1 = tab, 2+ = n spaces.
    4. Apply: Use this for indent/unindent actions.
    5. Newline: Follow indent of previous line immediately (ignore default).
  • Indent/Unindent:
    • Add support for indent/unindent actions.
    • that use indentation of previous line that is not comment or string or whitespace/blank.
    • and try auto indent one level extra if previous line ends with colon or bracket start.
    • and dedent one level extra if previous line ends with bracket end.
  • Newline: Add support for newline actions similar to indent.

• Tree-sitter Indent: Attempt to allow Tree-sitter to handle indentation if possible.

• Scrolling: Add logic where selecting at the end of the screen scrolls down (and vice versa).

  • Implementation: Update main.cc to send drag events to the selected editor.

• Documentation UI: Capture Ctrl+h / Ctrl+l for scrolling documentation windows.

UX

• Editor word highlighter: Do not recompute word under cursor if not changed.

• Completion Filtering:

  • Stop filtering case-sensitive.
  • Normalize completion edits if local filtering is used.

• UI Refinement:

  • Allow completion list to be scrolled; show only x max items.
  • Finish autocomplete box style functions.

• LSP Features:

  • Add LSP jumping support (Go to Definition, Hover).
  • Add LSP rename support.
  • Handle snippets properly in autocomplete: use only the last word in signature when replacing and set cursor to the first one.

• Basic Autocomplete: Keep a list of words in the current buffer for non-LSP fallback.

• Language Support:

  • Add ECMA to JS and make TSX support.
  • Add formatting for files where LSP doesn't provide it.
  • Redo grammar files properly (especially cpp).

Major Features

• Search & Replace:

  • Add Search/Replace UI.
  • Support capture groups ($1, $2) or allow Perl regex directly.
  • Ensure virtual cursors are included in search positions.

• Multi-Cursor:

  • Add virtual cursor support (edits apply to all locations).
  • Add Alt+Click to set multiple cursors.
  • Allow search and place cursor at all matches.

• Block Selection:

  • Double-clicking a bracket selects the whole block (first time only) and sets mode to WORD.

• Tree-sitter Context:

  • Get code context from Tree-sitter.
  • Get node path of current cursor and add indicator bar (breadcrumbs).
  • Highlight block edges when cursor is on/in a bracket.

Visuals, UI & Extensions?

Focus: Aesthetics and external integrations.

• Status Bar: Complete status bar and command runner.

• Visual Aids:

  • Expand color regex to match CSS colors in CSS files.
  • Add color picker/palette.

• Git: Add Git integration (status, diffs).

• AI/Snippets:

  • Add snippets support (LuaSnip/VSnip style).
  • Add Codeium/Copilot support (using VAI virtual text) as a test phase.

• SQL: Add SQL support (Viewer and Basic Editor).

• Prolly?: Add Splash Screen / Minigame.

Optimizations & Fluff

• Event Loop:

  • Make the whole engine event-driven rather than clock-driven.
  • Mybe keep background thread with dirty flag.
  • But merge input and render into a single loop that only renders when input affects render or background thread needs refresh and try to couple multiple renders.
  • LSP and inputs should be blocking (lsp on its fd) and inputs in io/input.cc

• Performance:

  • Switch JSON parser to RapidJSON (or similar high-performance lib).
  • Decrease usage of std::string in UI, LSP, and warnings.

• Folding: Redo folding system and its relation to move_line_* functions.

• Grammars:

  • Manually add redo SCM files (especially cpp/c/h).
  • Create lua-typed and man pages Tree-sitter grammars.

• Repo Maintenance: Once renderer is proven check commit 43f443e.