crib/TODO.md

Copyright 2025 Syed Daanish

TODO

Critical Fixes

Check each lsp with each of the features implemented

• 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).

• Critical Crash: Fix bug where closing immediately while LSP is still loading hangs and then segfaults (especially on slow ones like fish-lsp where quick edits and exit can hang).

• Line move: fix the move line functions to work without the calculations from folds as folds are removed.

• Modularize handle_events and renderer functions: The function is over 700 lines with a lot of repeating blocks. Split into smaller functions.

• Editor Indentation Fix: - Main : merger indentation with the parser for more accurate results.

  • Keep cache of language maps in engine to reduce lookup time.
  • In indents add function to support tab which indents if before any content and inserts a pure \t otherwise.
  • And backspace which undents if before any content.
  • Add block indentation support.
  • Ignore comments/strings from parser when auto-indenting.
  • These will dedent when the block immediately after them is dedented
  • Dont dedent if ending is valid starting is invalid but also empty
  • Just leave asis if starting is empty

• Readme: Update readme to show indetation mechanics.

• LSP Bug: Try to find out why emojis are breaking lsp edits. (check the ruby sample)

• UI Refinement:

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

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

• Redo hooks and folding as proper engines: With functions to checkstate/cursor like function and edits application.

• Do trextmate like regex grammar parsing with lsp symbols for semantic highlighting.

  • Probably remove tre--sitter or just keep it for context tree.
  • Making bracket matching andignoring strings/comments easier.

• remove tree-sitter mention from everywhere especially submodules

• make it faster for line inserts/deletes too (treeify the vector)

• Try to make all functions better now that folds have been purged

• Cleanup syntax and renderer files

• Fix ruby regexp not living across lines when edits are made

• for ruby regex use hueristic where is a space is seen after the / it is not a regexp

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

• Auto brace selection: Add support for auto brace selection.

• 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.

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.

• 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.
  • Also for vectors into managed memory especially for completions/lsp-stuff.

• 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.