Helix

Installation

git clone --depth 1 --recurse-submodules -j8 https://github.com/helix-editor/helix
cd helix
cargo install --path helix-term

This will install the hx binary to $HOME/.cargo/bin.

Notes

• server-client architecture via gRPC, UI separate from core
• multi cursor based editing and slicing
• WASM based plugins (builtin LSP & fuzzy file finder)

Structure similar to codemirror:

• text (ropes)
• column utils, stuff like tab aware (row, col) -> char pos translation
• word/grapheme/code point utils and iterators
• state
• transactions
• changes
• annotations (time changed etc)
• state effects
• additional editor state as facets
• snapshots as an async view into current state
• selections { anchor (nonmoving), head (moving) from/to } -> SelectionSet with a primary
• cursor is just a single range selection
• markers track a position inside text that synchronizes with edits
• { doc, selection, update(), splice, changes(), facets, tabSize, identUnit, lineSeparator, changeFilter/transactionFilter to modify stuff before }
• view (actual UI)
• renders via termwiz
• viewport(Lines) -> what's actually visible
• extend the view via Decorations (inline styling) or Components (UI)
  • mark / wieget / line / replace decoration
• commands (transform state)
• movement
• selection extension
• deletion
• indentation
• keymap (maps keys to commands)
• history (undo tree via immutable ropes)
• undoes transactions
• invert changes (generates a revert)
• (collab mode)
• gutter (line numbers, diagnostic marker, etc) -> ties into UI components
• rangeset/span -> mappable over changes (can be a marker primitive?)
• syntax (treesitter)
• indentation strategies
• fold
• selections (select mode/multiselect)
• matchbrackets
• closebrackets
• special-chars (shows dots etc for specials)
• panel (for UI: file pickers, search dialogs, etc)
• tooltip (for UI)
• search (regex? pcre)
• lint (async linters)
• lsp
• highlight (?)
• stream-syntax
• autocomplete
• comment (gc, etc for auto commenting)
• snippets

• terminal mode?

• plugins can contain more commands/ui abstractions to use elsewhere

• languageData as presets for each language (syntax, indent, comment, etc)

Vim stuff: - motions/operators/text objects - full visual mode - macros - jump lists - marks - yank/paste - conceal for markdown markers, etc