Follow an uri

Sup 0.20 introduces the possibility to open the uri that is under the cursor with the g key. When the user presses the key, sup parses the text that is under the cursor and in the following lines, up to the next paragraph jump (ie 2 newlines). If there is an uri and there is goto hook, it is called with the uri that is parsed.

A good, generic hook is the following script:

system("xdg-open #{uri} > /dev/null")

This requires installation of xdg-utils. On archlinux, there is a packet for this, called xdg-utils

An interactive hook to choose the browser:

### goto.rb -- follow an uri
# interactively choose the browser to use

## Configuration
# Hash containing name => browser command
browsers = {
        'firefox' => '/usr/bin/firefox',
        'uzbl' => '/usr/bin/uzbl-tabbed',
        'elinks' => '/usr/bin/elinks'
}
# default browser
default = "uzbl"
# prompt
prompt = "Follow Link with"
help = "(<tab> for choices, empty line for #{default})"

## Logic
# ask for browser
browser_key = nil
# ensure browser_key is in browsers.keys
until browsers.key? browser_key
  # use BufferManager's dialog function (compare lib/sup/buffer.rb)                  
  browser_key = BufferManager.ask_with_completions(
                                     :sign,           # token for BufferManager's sake.
                                     "#{prompt}: ",   # Prompt
                                     browsers.keys) # Array with posible completions
  # add help in case the first attempt was not successful
  prompt = "#{prompt} #{help}" 
  # check for empty line and select default browser
  if browser_key  == ""
    browser_key = default
    break
  end
end

# call browser with uri
system("#{browsers[browser_key]} \"#{uri}\" > /dev/null")