atto

A Truly Tiny text editOr

Yet another text editor ought to be as simple/small as possible (following the KISS principle). It is purely written in C and it's designed to be used solely on Microsoft Windows (relies on Win32 API). MinGW GCC has been used as the compiler.

Currently, my other tool slocWin32 reports only 1511 lines of code for this editor:

Very small indeed...

If you are intereseted in a more feature-rich analogue of this editor, check out my other repository femto.

There also exists a separate deprecated with_profiler branch if you are interested in a version with debug logging.

Obtaining

32-bit (x86) & 64-bit (x64) Windows binaries can be obtained here.

Features

Currently a fixed number of features is supported:

• file must be given as a command-line argument, 'raw editing'/'saving later to a file' is impossible for a reason
• all saved files use CRLF line-ending format by default, LF and CR are also supported with version 1.8
• atto editor utilizes the whole command prompt window, window is as big as your console currently is
• the last line of the window is dedicated to status, for example showing success or failure when an attempt to save the file has been made
• the following keyboard shortcuts:

  Key	Action
  ESC	Closes the editor
  Ctrl+S	Tries to save the current open file
  Ctrl+R	Tries to reload contents of current file
  Ctrl+E F	Switch to CRLF EOL sequence
  Ctrl+E L	Switch to LF EOL sequence
  Ctrl+E C	Switch to CR EOL sequence

• 2 ways to start the program:

  Syntax	Action
  atto	Shows help
  atto [file]	Starts editor with the specified file, does not have to exist where [file] is the file's name

Screenshots

Demonstrating unicode support, file test5.txt is open with LF EOL sequences

Last key shown on status bar with respective repeat count

Saving was successful, file size is now 48 bytes

Changelog

• 2.5
  • Refactoring
  • Port codebase to use universal size types size_t & ssize_t
  • Eliminate keypress skipping
• 2.4
  • Optimised keyboard key-checker
  • De-bloated code
• 2.3
  • Tweak key behaviour, Ctrl+E doesn't have to be immediately released anymore
• 2.2
  • Adopt tweaked status messages from femto
• 2.1
  • Make a version with removed profiler code, store the profiler version as a backup
  • Also remove debug asserts from that 'cleaned' version
• 2.0
  • Refactor and optimise codebase
• 1.9
  • Fix bug in renderer with editor randomly freezing when inserting characters
    • Renderer went into an infinite loop, if free space was 0 in line buffer
  • Add 64-bit version
• 1.8
  • Add extra documentation
  • Add support for CR and CRLF EOL sequences, LF is still supported
  • Files are saved using CRLF by default
  • Add support for changing EOL sequneces
• 1.7
  • Eliminate global variables
  • Add new data-save check, only saves if any changes were made
  • Fix bug with program crashing on empty files
  • Self-document code in the header files
• 1.6
  • Add minor check in input loop
  • Fix bug with cursor not showing properly on very long lines
  • Enhance viewpoint adaption
  • Add tabs-to-spaces automatic conversion
• 1.5
  • Add extra warnings to compilation, adjust code accordingly
  • Update restrict-correctness
  • Remove unnecessary const-madness
• 1.4
  • Fix memory leak in Unicode conversion functions, if input string is empty
• 1.3
  • Refactor and modularise codebase
  • Remove profiling from release build, make binary ~2x smaller
• 1.2
  • Rename everything finally from "pico" to "atto". "pico" was chosen initially, later swapped it out for "atto" ("pico" is already taken (predecessor of GNU nano)).
• 1.1
  • Fix arrow characters in status messages
• 1.0
  • Initial release

Contributing

This project is by no means perfect. Feel free to report any bugs, that you may find, under Issues. Feature requests are also welcome but keep in mind that the priority of this editor is to be as small as possible. Bug fixing is my first priority.

License

As stated, the project uses MIT license.