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114 lines
3.4 KiB
Markdown
114 lines
3.4 KiB
Markdown
## Fira Code: monospaced font with programming ligatures
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#### [Download Fira Code v0.5](https://github.com/tonsky/FiraCode/releases/download/0.5/FiraCode-Regular.otf)
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### Problem
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Programmers use a lot of symbols, often encoded with several characters. For human brain sequences like `->`, `<=` or `:=` are single logical token, even if they take two or three places on the screen. Your eye spends non-zero amount of energy to scan, parse and join multiple characters into a single logical one. Ideally, all programming languages should be designed with full-fledged Unicode symbols for operators, but that’s not the case yet.
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### Solution
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Fira Code is a Fira Mono font extended with a set of ligatures for common programming multi-character combinations. This is just a font rendering feature: underlying code remains ASCII-compatible. This helps to read and understand code faster. For some frequent sequences like `..` or `//` ligatures allow us to correct spacing.
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### Fira Code (with ligatures):
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<img src="./showcases/all_ligatures.png" />
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Compare to Fira Mono (without ligatures):
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<img src="./showcases/no_ligatures.png" />
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### Editor support
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Do **not** work:
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- Atom ([bug](https://github.com/atom/atom/issues/6055))
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- SublimeText ([vote here](http://sublimetext.userecho.com/topic/433445-opentype-support-ligatures-curly-quotes-contextual-and-alternate-symbols/))
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- Intellij Idea ([vote here](https://youtrack.jetbrains.com/issue/IDEA-127539))
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- XCode
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- iTerm 2 ([feature request](https://gitlab.com/gnachman/iterm2/issues/3568))
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- OS X Terminal.app
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- Emacs
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- gVim, MacVim
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Do work:
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- Visual Studio
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- TextMate 2
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- QtCreator
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- LightTable ([instructions](https://github.com/LightTable/LightTable/issues/1459#issuecomment-57366504))
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- BBEdit ([instructions](https://github.com/i-tu/Hasklig/issues/3#issue-46601683))
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- Chocolat
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Should work (copied from [Hasklig README](https://github.com/i-tu/Hasklig)):
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- Geany
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- gEdit
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- Kate
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- Konsole
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- KWrite
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- Smultron
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- Vico
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_Note:_ I’m not a font designer, and Fira Code is built in sort of [a hacky way](https://github.com/mozilla/Fira/issues/62) from OTF version of Fira Mono. Please forgive me if it doesn’t work for you. Help will be greatly appreciated.
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### Code examples
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Ruby:
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<img src="./showcases/ruby.png" />
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JavaScript:
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<img src="./showcases/javascript.png" />
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Erlang:
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<img src="./showcases/erlang.png" />
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Go:
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<img src="./showcases/go.png" />
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Haskell:
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<img src="./showcases/haskell.png" />
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### Alternatives
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Another monospaced fonts with ligatures:
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- [Hasklig](https://github.com/i-tu/Hasklig) (free)
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- [PragmataPro](http://www.fsd.it/fonts/pragmatapro.htm) (€59)
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- [Monoid](http://larsenwork.com/monoid/) (free)
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### Credits
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This work is based on OFL-licensed [Fira Mono font](https://github.com/mozilla/Fira). Original Fira Mono font was not changed, only extended.
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Fira Code was inspired by [Hasklig font](https://github.com/i-tu/Hasklig): Ligatures for Haskell code
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### Changelog
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**0.5**: `#{` `~-` `-~` `<==` `==>` `///` `;;` `</`
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**0.4**:
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- Added `~=` `~~` `#[`
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- Rolled back `&&` and `||` to more traditional look
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- `===` and `!==` are now rendered with 3 horisontal bars
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**0.3**: `~@` `#?` `=:=` `=<`
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**0.2.1**: Fixed width of `&&` and `||`
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**0.2**: `-->` `<--` `&&` `||` `=>>` `=/=`
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**0.1**
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`>>=` `=<<` `<<=` `->>` `->` `=>` `<<-` `<-`
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`===` `==` `<=>` `>=` `<=` `>>` `<<` `!==` `!=` `<>`
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`:=` `++` `#(` `#_`
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`::` `...` `..` `!!` `//` `/*` `*/` `/>`
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