calki 🧮 📝

A terminal-based Markdown note-taking tool and interactive math sheet calculator with local wiki-style link navigation.

calki combines real-time document-based calculations with the inter-linked organization of a personal wiki, all inside a fast, Vim-friendly terminal interface.

🚀 Key Features

• Interactive Math Sheets: Real-time evaluation of mathematical equations. Write assignments or expressions, end them with =>, and watch them calculate instantly when you exit Insert mode.

  

• Inline Math Evaluation: Run calculations right inside your sentences using backticks: `10m * 5m =>`.

• Powerful Calculation Engine: Far beyond basic arithmetic — trigonometry, statistics (mean, median, stddev, variance), vectors and matrices ([[1, 2], [3, 4]] with *, transpose, det, inv, and linear systems via linsolve(A, b)), complex numbers, symbolic differentiation (diff) and equation solving (solve — symbolic rearrangement, algebraic inversion, or Newton-Raphson with an optional initial guess for nonlinear equations), higher-order list operations (map, filter, reduce, zip), for/while loops and conditionals, financial functions (pmt, fv, pv), hex/binary literals, and inline sparklines.

• Dimensional & Currency Analysis: Supports physical units (length, speed, data size, temperature, time) and live-updated currency conversion (fetched via a background thread to prevent startup latency).

• Export: Compile the current note to HTML, or the entire wiki to a single Markdown document (Ctrl-e).

  

• Wiki Link Navigation: Create double-bracket links like [[Project Goals]] to connect notes. Press Enter on a link in Normal mode to jump to it, and Backspace or Ctrl-o to navigate back.

• Todo List Checkboxes: Press t in Normal mode while hovering over any list line to toggle the checkbox state [ ] <-> [x], or convert a plain list bullet into a checkbox item automatically.

• Custom Functions: Define custom functions directly in your notes (e.g. f(x) = x^2 + 2*x) and use them elsewhere in the same file. They are also displayed under the Variables panel.

• Triple-Panel Layout:

  • Left Panel (Wiki Map): View references and incoming backlinks for the current note.
  • Center Panel (Editor): Full-featured editor powered by edtui with Vim motion bindings.
  • Right Panel (Variables Inspector): View active variable scopes and mathematical evaluations.

• Persistent Session & Customization: Automatically saves your panel layout, cursor position, and preferences in ~/.config/calki/config.json.

• Automatic Version Checking: Checks for new updates on launch from GitHub in a non-blocking background thread and provides an option to skip/ignore warnings for the current update.

🛠️ Installation & Updating

To install calki, you will need the Rust toolchain installed on your machine. If you do not have it, install it via rustup:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

📦 Install via Cargo (Recommended)

Install the latest version of calki directly from crates.io:

cargo install calki

This compiles and installs the binary to your Cargo binary path (typically ~/.cargo/bin/), allowing you to run it anywhere by simply typing:

calki

🛠️ Build from Source

If you prefer to compile directly from the git repository:

1. Clone the repository:

   git clone https://github.com/kemika180/calki.git
   cd calki
   

2. Build the release binary:

   cargo build --release
   

3. (Optional) Install the binary globally:

   cargo install --path .
   

4. Run the compiled binary directly:

   ./target/release/calki
   

🔄 How to Update

• If installed via Cargo: Re-run the install command to fetch the latest version:

  cargo install calki
  

• If installed from Source: Pull the latest commits and rebuild:

  cd /path/to/calki
  git pull origin main
  cargo install --path .
  

⌨️ Keybindings & Navigation

calki uses Vim-like modal editing. You can navigate the editor using standard Vim motions (h, j, k, l, w, b, etc.). Repeat multipliers are supported for repeatable motions (e.g., 5j moves 5 lines down, 12w jumps forward 12 words, and 3x deletes 3 characters).

Panel Controls

Help & Reference Modals

Global Actions

Wiki Navigation (Normal Mode)

Editor Actions

⚙️ Configuration

calki stores configuration files in your OS-appropriate configuration directory (typically ~/.config/calki/ on Linux/macOS).

The config.json file supports customization of the following options:

• scrolloff (integer, default: 5): The number of lines to keep visible above and below the cursor when scrolling.
• mouse_focus_on_hover (boolean, default: true): If true, panel focus changes automatically when hovering the mouse pointer. If false, mouse click is required to focus a panel.
• expand_variables_on_select (boolean, default: false): If true, the variables panel will dynamically expand to show full variable names/values when it is selected/focused.
• line_numbers (string, default: "None"): Line numbering mode inside the editor. Supported options are "None", "Absolute", and "Relative".
• word_wrap (boolean, default: false): Wrap long lines in the editor instead of scrolling horizontally. Toggle live with F4.

Example configuration file (~/.config/calki/config.json):

{
  "scrolloff": 5,
  "mouse_focus_on_hover": true,
  "expand_variables_on_select": false,
  "line_numbers": "None",
  "word_wrap": false
}

📄 License

This project is licensed under the GPL v3 License. See the LICENSE file for details.