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Terminal Markdown editor with vim-style keys and live side-by-side preview

Project description

easymd

终端里的 Markdown 编辑器:左侧 vim 式编辑,右侧实时预览。基于 Textual

安装

需要 Python 3.10+。推荐用 pip 或 uv 从 PyPI 安装:

pip install easymd-cli      # 或: uv tool install easymd-cli
easymd 笔记.md               # 文件不存在时会在首次 :w 时创建

需要在编辑器里一键翻译预览(见下文「翻译预览」)时,装上可选依赖:

pip install 'easymd-cli[translate]'   # 或: uv tool install 'easymd-cli[translate]'

从源码开发:

git clone https://github.com/decajoin/easymd && cd easymd
uv sync --group dev
uv run easymd demo.md
uv run pytest            # 运行测试

按键参考

模式

按键 作用
i a A I o O 进入插入模式(位置同 vim)
R 替换模式(连续覆写,退格可恢复被覆写的字符)
Esc 回到普通模式
v 可视模式(y/d/c 作用于选区)
V 可视行模式(按整行选择,y/d/c 作用于整行;v/V 互切)

移动(普通/可视模式,支持数字前缀如 3j

h j k lw b e0 ^ $gg G3G 跳第 3 行)、{ } 段落、Ctrl+d/u 半页、Ctrl+f/b 整页

按键 作用
f F t T + 字符 行内查找:到 / 反向到 / 到前一格 / 反向到后一格;可配 operator(df, ct.
; / , 重复上次行内查找(同向 / 反向)
% 跳到匹配的括号(( ) [ ] { },支持嵌套与跨行)
* / # 搜索光标处单词(向后 / 向前,全词匹配),再用 n/N 继续

编辑

按键 作用
x 删除光标处字符
r / ~ 替换光标处字符 / 切换大小写(支持计数)
J 合并下一行(3J 合并三行)
dd / yy / cc 删除 / 复制 / 改写整行(支持 3dd
D / C / Y 删除至行尾 / 改写至行尾 / 复制整行
dw de d$ 操作符 + 移动(yc 同理;cw 同 vim 不吃尾随空格)
diw ci" ya( 文本对象:i/a + w " ' ` ( [ {,配 d/c/y 或可视模式
p / P 在后 / 前粘贴
. 重复上次修改(支持计数覆盖,如 3.
u / Ctrl+r 撤销 / 重做

命令与搜索

命令 作用
:w :w 文件名 保存
:q :q! :wq :x 退出(有未保存修改时 :q 会拒绝)
/文本 然后 n / N 搜索 / 下一个 / 上一个
:trans 切换右侧预览为译文 / 原文(见「翻译预览」)
:transback 切回原文预览
:refresh 重新翻译(编辑后更新译文,只重翻改动段)

翻译预览(DeepSeek)

装了 [translate] 可选依赖后,:trans 会把右侧预览整篇译成中文(默认)并缓存, 再次 :trans 切回原文。译文按 Markdown 语义块切分、按内容缓存:编辑原文后状态栏会 提示「译文已过期」,用 :refresh 只重翻改动的段落。译文模式下两栏不联动滚动,用滚轮 独立翻页。翻译结果只影响预览,不会写回你的文件。

配置 API key

优先用环境变量,其次配置文件 ~/.config/easymd/config.toml

export DEEPSEEK_API_KEY=sk-...        # 推荐
# 或交互式写入配置文件(权限 600):
easymd config set-key

配置文件示例:

[deepseek]
api_key = "sk-..."          # 也可用 DEEPSEEK_API_KEY 环境变量(优先)
model = "deepseek-v4-flash" # 可选 deepseek-v4-pro
target_lang = "中文"

相关命令:easymd config show(查看解析后的配置,key 已脱敏)、 easymd config set-model deepseek-v4-pro。也可在启动时覆盖: easymd --pro 笔记.mdeasymd --model <id> 笔记.mdeasymd --lang English 笔记.md

未装 [translate] 依赖或未配置 key 时,:trans 会在状态栏给出友好提示而不会崩溃。

项目结构

src/easymd/
  cli.py        # 命令行入口(typer:easymd FILE / easymd config ...)
  app.py        # 分屏布局、状态栏、命令行、预览同步、翻译视图状态机
  editor.py     # vim 模态层(TextArea 子类)
  config.py     # 读取 DeepSeek 配置(env > config.toml > 默认)
  translate.py  # 分块 + 内容缓存 + DeepSeek 客户端(可选依赖)
tests/          # pytest 套件(Textual Pilot 无头驱动真实按键)

运行测试:uv run pytest

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