charlesberrygroup/texty

Manages all editor state (cursor, viewport, selection, search, clipboard, mode flags) and implements all text-editing operations by coordinating between buffers, display, and satellite subsystems. The Editor struct is the application-wide 'god object' that all other modules reference.

Manages the array of open text buffers, including opening, saving, creating, and closing files. Each buffer holds its own line array, undo/redo stacks, git state, LSP diagnostics, cursor/viewport saved position, and dirty flag.

Implements a per-buffer stack-based undo/redo history using typed records that capture both the operation and the cursor positions before and after, enabling bidirectional traversal of edit history.

Renders the complete editor UI using ncurses, including the tab bar, gutter with git/LSP markers, syntax-highlighted text area, file explorer panel, git status panel, build panel, status bar, and modal popups (prompts and the fuzzy finder). Also hosts the function-pointer override mechanism that allows the GUI renderer to redirect display calls.

Implements the full graphical frontend using SDL2 and SDL_ttf, replacing ncurses rendering with pixel-accurate text drawing, a clickable toolbar, mouse-driven text selection, and a split-pane layout engine. Translates SDL keyboard events to ncurses key codes so all input logic is shared with the TUI.

Performs per-line, stateful syntax tokenization for multiple languages, producing a token array that maps each character position to a semantic token type used by both renderers for coloring.

Provides gutter change markers, git status panel, inline diff phantom lines, per-line blame annotations, hunk staging, and commit functionality by shelling out to the git CLI and parsing its output.

Manages a single language server process via stdin/stdout pipes, implementing the LSP JSON-RPC protocol for completion, go-to-definition, hover, references, formatting, rename, signature help, and diagnostics.

Provides fuzzy file finding (Ctrl+P), workspace/file symbol navigation (F7/Ctrl+T), recent files list (Ctrl+E), and the file explorer tree panel (Ctrl+B) by collecting, filtering, and presenting file and symbol entries through a shared popup UI.

The theme subsystem manages a collection of named color themes (built-in and user-defined) with cycle/select semantics, mapping ncurses color pair indices to foreground/background/bold settings. The build subsystem runs a configurable shell command, parses compiler error output into a structured list, and presents results in a bottom panel.