Lumacs/DEV_STATE.md

DEV_STATE.md - Lumacs Development State

Architecture

    [Lua 5.4 Engine]
         ^  |
         |  v
    [Lua API Bridge] <-- C++ bindings for buffers, windows, keybindings, themes
         ^  |
         |  v
    [Editor Core] <-- Buffer management, kill ring, face system
         ^  |
         |  v
    [UI Interface] <-- Abstract UI layer
         ^  |
         |  v
    [GTK4 Frontend] <-- Primary GUI (with TUI fallback available)
         |
         v
    [Terminal/Display]

Current Module

Phase 7: Performance Optimization - optimization of rendering pipeline, input handling, and resource usage.

File Manifest

Lumacs/

├── CMakeLists.txt           # Build configuration

├── init.lua                 # Main Lua initialization

├── themes.lua              # Theme definitions

├── include/lumacs/         # C++ headers

│   ├── editor_core.hpp     # Core editor logic

│   ├── buffer.hpp          # Text buffer management

│   ├── lua_api.hpp         # C++/Lua bridge

│   ├── gtk_editor.hpp      # GTK4 frontend

│   ├── tui_editor.hpp      # TUI fallback

│   ├── keybinding.hpp      # Key handling

│   ├── theme.hpp           # Theme/face system

│   └── [other headers]

├── src/                    # C++ implementation

│   ├── main.cpp            # Entry point

│   ├── editor_core.cpp     # Core functionality

│   ├── lua_api.cpp         # Lua bindings

│   ├── gtk_editor.cpp      # GTK implementation

│   └── [other .cpp files]

├── tests/                  # Unit tests

├── examples/               # Test files and demos

├── scripts/                # Build/test scripts

└── documentation/          # Project docs

Done

• ✅ Phase 1-5: Complete Emacs-like core functionality

• ✅ Phase 6 Core: GTK4 frontend with text rendering

• ✅ Input System: Full keyboard input with modifiers working

• ✅ Cursor System: Emacs-style blinking block cursor with color inversion

• ✅ Text Editing: Basic insertion, deletion, movement operations working

• ✅ Keybinding System: Fixed conflicts, C-n, C-p, C-f, C-b, C-a, C-e, C-s, C-k working

• ✅ Clean Exit: Fixed shutdown crashes and memory issues

• ✅ Syntax Highlighting: Face system with Pango rendering

• ✅ Text-Cursor Alignment: Fixed text rendering offset issues

• ✅ Scrolling System: Full vertical and horizontal scrolling with Page Up/Down support

• ✅ Kill Ring System: Complete implementation with push/yank/yank-pop operations

• ✅ Mark & Region: Full mark/region system in Buffer (set_mark, deactivate_mark, get_region)

• ✅ Buffer Management: Complete buffer switching, listing, and management in EditorCore

• ✅ Core Emacs Features: Registers, keyboard macros, rectangles, kill operations

• ✅ GTK Segfault Fix: Resolved double-free on exit with proper cleanup handling

• ✅ GTK Window Splits: Dynamic container layout with Gtk::Paned matching EditorCore's window tree

• ✅ Window Split Crash Fix: Resolved window split crashes and text rendering issues

• ✅ Multi-Window Text Rendering: Fixed text rendering in split windows with proper font metrics

• ✅ Split Window UI Polish: Fixed modeline display, focus stability, and split ratio calculations

• ✅ Window Split Freeze Fix: Resolved GTK signal_realize callback issues causing freezes during splits

• ✅ Split Window Cursor Fix: Fixed cursor movement to work in focused window rather than original active window

• ⚠️ Focus Jumping Partial Fix: Identified spurious next_window() calls but focus still jumps during typing

• ✅ Split Ratio Improvement: Implemented initial split ratio using signal_map with fallback

• ✅ Modeline: Implemented detailed Emacs-like modeline with active/inactive states, flags, percentage, and mode display

• ✅ Minibuffer Polish: Implemented Tab completion (buffers/files), command history (up/down), and kill-buffer logic

Todo

1. Pango Layout Caching: Cache Pango layouts to avoid recreation on every frame/keystroke

2. Render Optimization: Optimize draw_window to only redraw changed lines if possible (or reduce overhead)

3. Memory Profiling: Check for memory leaks or excessive allocations

Technical Debt/Notes

• Lua Bridge: The lua_api.cpp contains the critical C++/Lua boundary code

• GTK Threading: All GTK operations must stay on main thread

• Memory Management: Using RAII and smart pointers throughout C++ code

• Face System: Themes are fully integrated with Pango text rendering

• Cursor Implementation: Blinking timer with 500ms intervals, proper cleanup on exit

• Scrolling Architecture: Viewport system with 3-line vertical and 5-column horizontal margins

• Build System: CMake-based with proper dependency management

• Testing: Unit test framework in place for core components

Current Focus

Phase 7 Performance Optimization:

• Implementing Pango layout caching

• Analyzing rendering performance