OE — Terminal Text Editor

A cross-platform terminal text editor inspired by the classic MS-DOS edit command, built with Go and tcell.

OE (Open Editor) 是一款跨平台终端文本编辑器，灵感来自经典的 Windows MS-DOS edit 命令。提供 View/Edit 双模式、命令面板、文件浏览器等现代化功能。

---

Features / 功能特性

English	中文
View/Edit dual mode (read-only by default)	View/Edit 双模式（默认只读）
Command palette (Ctrl+P) with fuzzy search	命令面板 (Ctrl+P)，支持模糊搜索
File browser with directory navigation (Ctrl+O)	文件浏览器，支持目录导航 (Ctrl+O)
Mouse support (click, scroll, drag-select)	鼠标支持（点击、滚轮、拖拽选择）
System clipboard (copy/cut/paste)	系统剪贴板（复制/剪切/粘贴）
Search (Ctrl+F) with find-next (F3)	搜索 (Ctrl+F)，查找下一个 (F3)
Three-way save dialog (Save/Don't Save/Cancel)	三选保存对话框（保存/不保存/取消）
Undo (snapshot-based, up to 100 steps)	撤销（基于快照，最多 100 步）
Line numbers	行号显示
Status bar with mode indicator	状态栏（模式/文件名/光标位置）
Full CJK character support	完整中文/日文/韩文支持
Cross-platform (Linux, macOS, Windows)	跨平台（Linux / macOS / Windows）

---

Screenshot / 界面预览

┌─────────────────────────────────────────────────┐
│  /home/user/projects                             │
│  Path> test.txt                             █    │
│─────────────────────────────────────────────────│
│  ↑ [up-dir]                                     │
│  > src                                           │
│  > docs                                          │
│    main.go                                       │
│    go.mod                                        │
│    README.md                                     │
│    test.txt                                      │
├─────────────────────────────────────────────────┤
│ [VIEW]  main.go  42:8  UTF-8    Ctrl+P:命令面板  │
└─────────────────────────────────────────────────┘

---

Quick Start / 快速开始

# Clone / download
git clone https://github.com/zsying/oe.git
cd oe

# Build
go build -ldflags="-s -w" -o oe .

# Run
./oe               # New blank file
./oe README.md     # Open existing file

Dependencies / 依赖

• Go 1.21+
• tcell v2 — terminal UI
• go-runewidth — wide character support
• atotto/clipboard — system clipboard

---

Keybindings / 快捷键

Global / 全局

Key	Action
Ctrl+E	Toggle View/Edit mode
Ctrl+P	Command palette
Ctrl+O	Open file (file browser)
Ctrl+S	Save file
Ctrl+Q	Quit
Ctrl+F	Find
F3	Find next
Ctrl+H	Replace
Ctrl+Z	Undo

Navigation / 导航

Key	Action
↑↓←→	Move cursor
PgUp / PgDn	Page up / down
Home / End	Start / end of line

Edit Mode / 编辑模式

Key	Action
Ctrl+X	Cut
Ctrl+C	Copy
Ctrl+V	Paste
Ctrl+A	Select all
Del	Delete forward
Backspace	Delete backward
Enter	New line
Tab	Insert tab (4 spaces)

File Browser / 文件浏览器

Key	Action
Typing	Enter path (focus on input)
↓ / ↑	Switch to file list / navigate
Tab	Toggle focus (input ↔ list)
Enter	Confirm path / open file
Esc	Cancel

---

Project Structure / 项目结构

oe/
├── main.go              # Entry point
├── internal/
│   ├── buffer/          # Text buffer (line array)
│   ├── editor/          # Editor state & commands
│   ├── screen/          # Terminal UI (tcell)
│   ├── widgets/         # UI widgets (status bar, dialog, etc.)
│   └── clipboard/       # System clipboard wrapper
├── docs/                # Design documents & plans
└── go.mod

---

License / 许可

MIT