agorf / Femto
Licence: unlicense
A toy text editor with no dependencies written in Ruby
Stars: ✭ 34
Programming Languages
ruby
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femto
A minimal text editor written for fun in plain Ruby with no dependencies.
I wrote it from memory after watching the relevant screencast by Gary Bernhardt. It supports:
- Quitting
- Moving the cursor up/down/right/left
- Deleting the character before the cursor, like backspace
- Breaking a line (
Enter
) - Undoing!
Additional functionality
The following are also implemented (not covered in the screencast):
- Flicker-free screen
- Ignoring non-printable characters
- Creating a file if it doesn't exist (not just editing)
- Saving
- Redoing!
- Moving left at the beginning of a line causes the cursor to jump to the end of the previous line
- Moving right at the end of a line causes the cursor to jump to the beginning of the next line
- Moving the cursor to the beginning of the line
- Moving the cursor to the end of the line
- Deleting the character before the cursor at the beginning of a line joins lines
- Deleting the character at the cursor, like delete
- Deleting the character at the cursor when at the end of a line joins lines
- Deleting the line text before the cursor
- Deleting the line text after (and including) the cursor
- Support for arrow,
Backspace
,Delete
,Home
andEnd
keys
Usage
./femto.rb myfile.txt
Keyboard shortcuts
-
Ctrl-Q
quits -
Ctrl-S
saves -
Ctrl-P
(previous), or theUp
arrow key, moves the cursor up -
Ctrl-N
(next), or theDown
arrow key, moves the cursor down -
Ctrl-F
(forward), or theRight
arrow key, moves the cursor right -
Ctrl-B
(backward), or theLeft
arrow key, moves the cursor left -
Ctrl-A
orHome
moves the cursor to the beginning of the line -
Ctrl-E
orEnd
moves the cursor to the end of the line -
Ctrl-H
orBackspace
deletes the previous character -
Ctrl-D
orDelete
deletes the current character -
Ctrl-U
deletes the line text before the cursor -
Ctrl-K
deletes the line text after (and including) the cursor -
Ctrl--
undoes the last change -
Ctrl-R
redoes the last change
Roadmap
- Tests
- Scroll-buffer
Disclaimer
This is an experimental program. Do NOT use it to edit files that you don't want to lose/damage.
License
Author
Angelos Orfanakos, https://agorf.gr/
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