STDOUT text formatting

formatador

STDOUT text formatting

Quick and dirty

You can call class methods to print out single lines like this:

Formatador.display_line('Hello World')

You use tags, similar to html, to set formatting options:

Formatador.display_line('[green]Hello World[/]')

[/] resets everything to normal, colors are supported and [_color_] sets the background color.

Standard options

• format - and adds color codes if STDOUT.tty? is true
• display - calls format on the input and prints it
• display_line - calls display, but adds on a newline (\n)
• redisplay - Displays text, prepended with \r which will overwrite the last existing line

Extensions

• display_table: takes an array of hashes. Each hash is a row, with the keys being the headers and values being the data. An optional second argument can specify which headers/columns to include and in what order they should appear.
• display_compact_table: Same as display_table, execpt that split lines are not drawn by default in the body of the table. If you need a split line, put a :split constant in the body array.
• redisplay_progressbar: takes the current and total values as its first two arguments and redisplays a progressbar (until current = total and then it display_lines). An optional third argument represents the start time and will add an elapsed time counter.

Progress Bar examples

total    = 1000
progress = Formatador::ProgressBar.new(total)

1000.times do
  progress.increment
end

#=> 978/1000  |************************************************* |

# Change the color of the bar
total    = 1000
progress = Formatador::ProgressBar.new(total, :color => "light_blue")

1000.times do
  progress.increment
end

# Change the color of a completed progress bar
total    = 1000
progress = Formatador::ProgressBar.new(total) { |b| b.opts[:color] = "green" }

1000.times do
  progress.increment
end

Table examples

table_data = [
  { :name => "Joe",  :food => "Burger" },
  { :name => "Bill", :food => "French fries" }
]
Formatador.display_table(table_data)

#=> +------+--------------+
#   | name | food         |
#   +------+--------------+
#   | Joe  | Burger       |
#   +------+--------------+
#   | Bill | French fries |
#   +------+--------------+

table_data = [
  {
    :name => "Joe",
    :meal => {
      :main_dish => "Burger",
      :drink => "water"
    }
  },
  {
    :name => "Bill",
    :meal => {
      :main_dish => "Chicken",
      :drink => "soda"
    }
  }
]
Formatador.display_table(table_data, [:name, :"meal.drink"])

#=> +------+------------+
#   | name | meal.drink |
#   +------+------------+
#   | Joe  | water      |
#   +------+------------+
#   | Bill | soda       |
#   +------+------------+

Indentation

By initializing a formatador object you can keep track of indentation:

formatador = Formatador.new
formatador.display_line('one level of indentation')
formatador.indent {
  formatador.display_line('two levels of indentation')
}
formatador.display_line('one level of indentation')

Copyright

(The MIT License)

Copyright (c) 2015 geemus (Wesley Beary)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.