https://github.com/chrisdone-archive/vado

A demo web browser engine written in Haskell
https://github.com/chrisdone-archive/vado

cairo haskell sdl sdl2 web

Last synced: 2 months ago
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A demo web browser engine written in Haskell

• Host: GitHub
• URL: https://github.com/chrisdone-archive/vado
• Owner: chrisdone-archive
• License: bsd-3-clause
• Archived: true
• Created: 2017-08-01T14:15:54.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2019-04-27T09:40:54.000Z (almost 6 years ago)
• Last Synced: 2024-11-29T11:10:46.509Z (2 months ago)
• Topics: cairo, haskell, sdl, sdl2, web
• Language: Haskell
• Homepage:
• Size: 23.4 KB
• Stars: 281
• Watchers: 17
• Forks: 7
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# vado

**Vado** is Italian for *I go*.

This is a **demonstration program** that is able to load a web page up

and render it like in the early 90's. It supports laying out text,

different font sizes for headings, inline and block elements,

hyperlinks, bold and italics. It supports mousewheel scrolling, too.

I wrote this in a couple evenings, because it seemed straight-forward

to do so given the libraries available today. That's a good sign for

Haskell. Also, there's an inarticulate gut feeling I have that tells

me maybe it's worth celebrating these days in which the web is still

viewable in its simplest, earliest form.

The project was possible thanks to a few established Haskell packages:

* [http-client](https://www.stackage.org/package/http-client) for downloading via HTTP.

* [http-client-tls](https://www.stackage.org/package/http-client-tls) for TLS support.

* [html-conduit](https://www.stackage.org/package/html-conduit) for parsing the HTML in "quirks mode", i.e. supporting

  garbage HTML.

* [xml-conduit](https://www.stackage.org/package/xml-conduit) for dealing with the XML tree.

* [sdl2](https://www.stackage.org/package/sdl2) for creating a window and rendering context, handling mouse

  events.

* [sdl2-cairo](https://hackage.haskell.org/package/sdl2-cairo) and

  [cairo](https://www.stackage.org/package/cairo) for rendering text

  onto the SDL surface.

* [network-uri](https://www.stackage.org/package/network-uri) for parsing URIs and combining them.

This project is intended to be easy to build and cross-platform. If you succeed in

building this package on a platform that isn't listed in the

*Building* section, please open a PR with those instructions. It uses

the cross-platform SDL package, and the probably-less-so

cross-platform Cairo package for rendering text.

There's some groundwork for rendering boxes, padding, etc. but no

attempt has been made to implement that. One could use the

[language-css](http://hackage.haskell.org/package/language-css)

package to parse CSS and add styling to elements.

## Demo

![Demo video](https://i.imgur.com/vDhpsMw.gif)

## Building

[Get Stack](https://haskell-lang.org/get-started) for building Haskell

projects.

OS X instructions:

    $ brew install pkg-config libffi cairo sdl2 sdl2_image

    $ export PKG_CONFIG_PATH=/usr/local/opt/libffi/lib/pkgconfig

    $ stack install --install-ghc gtk2hs-buildtools

    $ stack install

Ubuntu Linux instructions:

    $ sudo apt-get install libcairo2-dev libsdl2-dev libsdl2-image-dev

    $ stack install --install-ghc gtk2hs-buildtools

    $ stack install

FreeBSD instructions:

**NOTE**: These instructions have not been updated to include SDL-image. If you use FreeBSD, please contribute changes to these instructions!

    $ pkg install cairo

    $ pkg install sdl2

    $ stack install --install-ghc gtk2hs-buildtools

    $ stack install

Windows instructions

    $ stack exec -- pacman -Sy mingw-w64-x86_64-cairo mingw-w64-x86_64-pkg-config mingw-w64-x86_64-SDL2 mingw-w64-x86_64-SDL2_image

    $ stack install --install-ghc gtk2hs-buildtools

    $ stack install

## Running

It accepts an initial home page URL:

    $ vado 

It doesn't support back/forward or other history features.