tart - terminal art program

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Tart is a program that provides an image-editor-like interface to creating ASCII art - in the terminal, with your mouse! This program is written using my purely-functional terminal user interface toolkit, Brick.

Status

Expectation management: This is a fun hobby project that I spent time on when I first created it many years ago. Since then, I have only done a little bit to keep it working. Since it was (and still is) mostly intended as a proof of concept, and since I do not use the tool actively, I have not been putting much energy into maintaining it beyond keeping it building. While that isn't likely to change, I am happy to support people who want to contribute to the tool and I may have energy to fix small things as they are reported. Use at your own risk. If other tools are more mature or perform better, you are probably better off using them!

Building

tart is a Haskell project. You'll need GHC (preferably at least 8.2) and cabal-install (preferably at least 2.0). Then:

$ git clone https://github.com/jtdaugherty/tart.git
$ cd tart
$ cabal new-build
$ $(find . -name tart -type f)

By default, tart is built as both a library and a command-line tool. But if you want to use tart only for its Haskell library and avoid the additional executable dependencies, you can build with the libonly cabal build flag.

Features

• Drawing tools: freehand, line, box, flood fill, text string
• Utility tools: repaint, restyle, eyedropper, eraser
• Multiple graphical styles for boxes
• Named image layers with reordering, visibility toggling
• Character selection for freehand and flood fill tools
• Set foreground color, background color, and text style independently
• Full mouse interaction and keyboard shortcuts
• Paste text from clipboard into canvas
• Undo and redo
• Text styles: bold, blink, underline, reverse video
• Load and save ASCII art files (binary)
• Save plain versions of ASCII art for embedding in documents
• Save color versions of ASCII art with terminal escape sequences for printing to terminals
• Import existing plaintext files as the basis for new ASCII art files
• Set arbitrary canvas size

Terminal Emulator Support

tart has been tested extensively with the following terminal emulators and is known to work well with them:

• OS X: iTerm2
• OS X: Terminal.app

Please let me know if you use tart with another emulator and let me know how well it works!

Keybindings

Tools / styles:

• 0..9: select tool
• y: open the attribute style selector
• !/@/#/$: select attribute style
• f/b: open foreground / background palette selectors
• c: set tool drawing character (where applicable)
• </>: decrease / increase tool size (where applicable)
• Esc: cancel tool drag (e.g. box)

Canvas:

• w/a/s/d: move canvas
• C: re-center canvas
• v: set canvas size
• -/+: decrease / increase canvas size

Layers:

• C-a: add new layer
• C-r: rename current layer
• C-n/C-p: select next/previous layer
• C-x: delete selected layer
• C-u/C-d: move current layer up / down
• C-v: toggle selected layer's visibility
• C-l: toggle visibility of layer list

General:

• q: quit (and optionally save)
• C-s: save
• u: undo
• r: redo
• OS paste: paste text into canvas

How It Works

Tart requires a terminal with mouse support. You use various tools (such as freehand drawing, boxes, etc.) to draw ASCII pictures. You can set a current foreground and background color. You can also resize the drawing canvas to get the desired output size. When you're finished, you can save to disk, at which point Tart creates three files:

• A binary file (say foo.tart) suitable for reloading with Tart for further editing later
• A text file foo.color.txt containing the ASCII art with terminal color escape sequences, suitable for emitting to terminals
• A text file foo.plain.txt containing the ASCII art without terminal color escape sequences, suitable for embedding in documentation

Contributing

If you decide to contribute, that's great! Here are some guidelines you should consider to make submitting patches easier for all concerned:

• If you want to take on big things, talk to me first; let's have a design/vision discussion before you start coding. Create a GitHub issue and we can use that as the place to hash things out.
• Please make changes consistent with the conventions I've used in the codebase.
• Please adjust or provide Haddock and/or user guide documentation relevant to any changes you make.