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138 lines
6.8 KiB
Markdown
138 lines
6.8 KiB
Markdown
_N.B. This is a fork of the_ [Source Code Pro repository](https://github.com/adobe-fonts/source-code-pro)
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### Hasklig – _Ligatures for code_
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Programming languages are limited to relatively few characters. As a result, combined character operators surfaced quite early, such as the widely used arrow (`->`), comprised of a hyphen and greater sign. It looks like an arrow if you know the analogy and squint a bit.
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Composite glyphs are problematic in languages such as Haskell which utilize these complicated operators (`=>` `-<` `>>=` etc.) extensively. The readability of such complex code improves with pretty printing. Academic articles featuring Haskell code often use [lhs2tex](https://www.andres-loeh.de/lhs2tex/) to achieve an appealing rendering, but it is of no use when programming.
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Some Haskellers have resorted to Unicode symbols (`⇒`, `←` _etc._), which are valid in the <span style="font-variant: small-caps">ghc</span>. However they are one-character-wide and therefore eye-strainingly small. Furthermore, when displayed as substitutes to the underlying multi-character representation, as [vim2hs](https://github.com/dag/vim2hs) does, the characters go out of alignment.
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Hasklig solves the problem the way typographers have always solved ill-fitting characters which co-occur often: [ligatures](https://en.wikipedia.org/wiki/Typographic_ligature). The underlying code stays the same — only the representation changes.
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Not only can multi-character glyphs be rendered more vividly, other problematic things in monospaced fonts, such as spacing can be corrected.
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[**Download Hasklig Font Family v1.1**](https://github.com/i-tu/Hasklig/releases/download/1.1/Hasklig-1.1.zip)
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#### Hasklig
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#### Source Code Pro
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### Release notes
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+ [v1.1](https://github.com/i-tu/Hasklig/releases/tag/1.1)
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+ New ligatures `->>`, `:::`, `>=>`, `<=<`, `<=>`, `<->`
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+ Switched to newer version of calt code by [Nikita Prokopov](https://github.com/tonsky/FiraCode). It "doesn’t apply ligatures to long sequences of chars, e.g. !!!!, >>>>, etc"
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+ Fixed `++` and `+++` line inconsistency in heavy italic weights
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+ [v1.0](https://github.com/i-tu/Hasklig/releases/tag/1.0)
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+ Updates to the latest version of SCP
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+ Hasklig moves to a ligature substitution mechanism borrowed from the excellent [Fira Code by Nikita Prokopov](https://github.com/tonsky/FiraCode)
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+ [v0.9]((https://github.com/i-tu/Hasklig/releases/download/0.9/Hasklig-0.9.zip)): This is a major update so YMMV. Please report any issues.
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+ Converted to UFO format and updated base fonts to benefit from work done on [Source Code Pro](https://github.com/adobe-fonts/source-code-pro/):
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- ***Italics!***
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- Greek & Cyrillic script support
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- Better powerline symbols
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- [Much, much more](https://github.com/adobe-fonts/source-code-pro/releases/tag/2.010R-ro%2F1.030R-it)
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- Added tags that enable support for some IntelliJ IDEA Builds
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+ v0.4: New ligatures: `<*` `<*>` `<+>` `<$>` `***` `<|>` `!!` `||` `===` `==>`, [Powerline](https://github.com/powerline/powerline) symbol support
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+ v0.3: New ligatures: `<<<` `>>>` `<>` and `+++`
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+ v0.2: Lengthened `==` and `/=` to match other equals signs
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+ v0.1: Ligatures `<-` `->` `=>` `>>` `<<` `>>=` `=<<` `..` `...` `::` `-<` `>-` `-<<` `>>-` `++` `/=` and `==`
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#### Currently implemented symbols
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`<*` `<*>` `<+>` `<$>` `***` `<|` `|>` `<|>` `!!` `||` `===` `==>` `<<<` `>>>` `<>` `+++` `<-` `->` `=>` `>>` `<<` `>>=` `=<<` `..` `...` `::` `-<` `>-` `-<<` `>>-` `++` `/=` `==`
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#### Editor Support
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This list is compiled based on reports on the current state of support for code editors and terminals. This list
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#### Supported editors
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+ Atom (*[since v1.1.0](http://blog.atom.io/2015/10/29/atom-1-1-is-out.html)*)
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- Can also be installed as package courtesy of [atom-hasklig](https://atom.io/packages/hasklig) by [adilparvez](https://github.com/adilparvez)
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+ BBEdit 11 ([Instructions](https://github.com/i-tu/Hasklig/issues/3#issue-46601683))
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+ Brackets
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+ Chocolat
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+ Geany
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+ gEdit
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+ iTerm2 (*[Currently only using beta build – 3.1 and onwards](https://gitlab.com/gnachman/iterm2/issues/3568#note_13118332)*)
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+ Kate
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+ Konsole
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+ KWrite
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+ Leksah (_x64 W8 reported not working_)
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+ Light Table ([Instructions](https://github.com/LightTable/LightTable/issues/1459#issuecomment-57366504))
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+ MacVim (_Since release 79. See [Issue 32](https://github.com/i-tu/Hasklig/issues/32)_)
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+ QtCreator (_v.3.2.2 on GNU/Linux x64_)
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+ RStudio
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+ Smultron
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+ Sublime Text 3
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+ Terminal (OSX)
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+ TextEdit
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+ TextMate (_from version 2.0-alpha.9549 onwards_)
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+ Vico
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+ Visual Studio 2015
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+ Visual Studio Code
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+ Xcode (requires [an additional plugin](https://github.com/robertvojta/LigatureXcodePlugin))
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+ IntelliJ IDEA (*[since v2016.2](https://blog.jetbrains.com/idea/2016/07/intellij-idea-2016-2-is-here)*)
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#### No support
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- Emacs
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- gVim (_output corrupted. A_ [patch](https://groups.google.com/forum/#!topic/vim_dev/0sETSAwe5Wo) _exists, but it has not been incorporated into mainstream gVim._)
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- KDevelop 4
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- Notepad++
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- Xamarin Studio/Monodevelop
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### Building the fonts from source
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#### Requirements
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To build the binary font files from source, you need to have installed the
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[Adobe Font Development Kit for OpenType](http://www.adobe.com/devnet/opentype/afdko.html) (AFDKO). The AFDKO
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tools are widely used for font development today, and are part of most font
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editor applications.
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Some SVG glyphs are inserted into the fonts using Python [FontTools](https://pypi.python.org/pypi/FontTools).
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#### Building font instances from masters
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This repository only includes so-called *master* weights of the fonts (effectively extralight and black).
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The shapes of the weights in between these extremities are calculated by `makeInstancesUFO` supplied with `.designspace` files.
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For convenience, the shell script **buildInstances** is provided, which executes `makeInstancesUFO`, calculating all the italic and regular font weight shapes.
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```sh
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$ ./buildInstances.sh
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```
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#### Building one font
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The key to building OTF or TTF fonts is `makeotf`, which is part of the AFDKO toolset.
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Information and usage instructions can be found by executing `makeotf -h`.
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In this repository, all necessary files are in place for building the OTF and TTF fonts.
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For example, build a binary OTF font for the Regular style like this:
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```sh
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$ cd Roman/Regular/
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$ makeotf -r
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```
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#### Building all fonts
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For convenience, a shell script named **build** is provided in the root directory.
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It builds all OTFs and TTFs, and can be executed by typing:
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```sh
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$ ./build.sh
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```
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or this on Windows:
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```sh
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> build.cmd
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```
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### Credits
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Original idea, design and implementation of code ligatures by Ian Tuomi 2014-2015.
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This typeface extends [Source Code Pro](https://github.com/adobe-fonts/source-code-pro) with ligatures.
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