IO.ANSI

Functionality to render ANSI escape sequences.

ANSI escape sequences are characters embedded in text used to control formatting, color, and other output options on video text terminals.

Summary

Types

ansidata()

Functions

black()

Sets foreground color to black

black_background()

Sets background color to black

blink_off()

Blink: off

blink_rapid()

Blink: rapid. MS-DOS ANSI.SYS; 150 per minute or more; not widely supported

blink_slow()

Blink: slow. Less than 150 per minute

blue()

Sets foreground color to blue

blue_background()

Sets background color to blue

bright()

Bright (increased intensity) or bold

clear()

Clears screen

clear_line()

Clears line

color(code)

Sets foreground color

color(r, g, b)

Sets the foreground color from individual RGB values

color_background(code)

Sets background color

color_background(r, g, b)

Sets the background color from individual RGB values

conceal()

Conceal. Not widely supported

crossed_out()

Crossed-out. Characters legible, but marked for deletion. Not widely supported

cyan()

Sets foreground color to cyan

cyan_background()

Sets background color to cyan

default_background()

Default background color

default_color()

Default text color

enabled?()

Checks if ANSI coloring is supported and enabled on this machine

encircled()

Encircled

faint()

Faint (decreased intensity). Not widely supported

font_1()

Sets alternative font 1

font_2()

Sets alternative font 2

font_3()

Sets alternative font 3

font_4()

Sets alternative font 4

font_5()

Sets alternative font 5

font_6()

Sets alternative font 6

font_7()

Sets alternative font 7

font_8()

Sets alternative font 8

font_9()

Sets alternative font 9

format(chardata, emit? \\ enabled?())

Formats a chardata-like argument by converting named ANSI sequences into actual ANSI codes

format_fragment(chardata, emit? \\ enabled?())

Formats a chardata-like argument by converting named ANSI sequences into actual ANSI codes

framed()

Framed

green()

Sets foreground color to green

green_background()

Sets background color to green

home()

Sends cursor home

inverse()

Image: negative. Swap foreground and background

inverse_off()

Image: positive. Normal foreground and background

italic()

Italic: on. Not widely supported. Sometimes treated as inverse

light_black()

Sets foreground color to light black

light_black_background()

Sets background color to light black

light_blue()

Sets foreground color to light blue

light_blue_background()

Sets background color to light blue

light_cyan()

Sets foreground color to light cyan

light_cyan_background()

Sets background color to light cyan

light_green()

Sets foreground color to light green

light_green_background()

Sets background color to light green

light_magenta()

Sets foreground color to light magenta

light_magenta_background()

Sets background color to light magenta

light_red()

Sets foreground color to light red

light_red_background()

Sets background color to light red

light_white()

Sets foreground color to light white

light_white_background()

Sets background color to light white

light_yellow()

Sets foreground color to light yellow

light_yellow_background()

Sets background color to light yellow

magenta()

Sets foreground color to magenta

magenta_background()

Sets background color to magenta

no_underline()

Underline: none

normal()

Normal color or intensity

not_framed_encircled()

Not framed or encircled

not_italic()

Not italic

not_overlined()

Not overlined

overlined()

Overlined

primary_font()

Sets primary (default) font

red()

Sets foreground color to red

red_background()

Sets background color to red

reset()

Resets all attributes

reverse()

Image: negative. Swap foreground and background

reverse_off()

Image: positive. Normal foreground and background

underline()

Underline: single

white()

Sets foreground color to white

white_background()

Sets background color to white

yellow()

Sets foreground color to yellow

yellow_background()

Sets background color to yellow

Types

ansidata()

ansidata() :: ansilist() | ansicode() | binary()

Functions

black()

Sets foreground color to black.

black_background()

Sets background color to black.

blink_off()

Blink: off.

blink_rapid()

Blink: rapid. MS-DOS ANSI.SYS; 150 per minute or more; not widely supported.

blink_slow()

Blink: slow. Less than 150 per minute.

blue()

Sets foreground color to blue.

blue_background()

Sets background color to blue.

bright()

Bright (increased intensity) or bold.

clear()

Clears screen.

clear_line()

Clears line.

color(code)

color(0..255) :: String.t()

Sets foreground color.

color(r, g, b)

color(0..5, 0..5, 0..5) :: String.t()

Sets the foreground color from individual RGB values.

Valid values for each color are in the range 0 to 5.

color_background(code)

color_background(0..255) :: String.t()

Sets background color.

color_background(r, g, b)

color_background(0..5, 0..5, 0..5) :: String.t()

Sets the background color from individual RGB values.

Valid values for each color are in the range 0 to 5.

conceal()

Conceal. Not widely supported.

crossed_out()

Crossed-out. Characters legible, but marked for deletion. Not widely supported.

cyan()

Sets foreground color to cyan.

cyan_background()

Sets background color to cyan.

default_background()

Default background color.

default_color()

Default text color.

enabled?()

enabled?() :: boolean()

Checks if ANSI coloring is supported and enabled on this machine.

This function simply reads the configuration value for :ansi_enabled in the :elixir application. The value is by default false unless Elixir can detect during startup that both stdout and stderr are terminals.

encircled()

Encircled.

faint()

Faint (decreased intensity). Not widely supported.

font_1()

Sets alternative font 1.

font_2()

Sets alternative font 2.

font_3()

Sets alternative font 3.

font_4()

Sets alternative font 4.

font_5()

Sets alternative font 5.

font_6()

Sets alternative font 6.

font_7()

Sets alternative font 7.

font_8()

Sets alternative font 8.

font_9()

Sets alternative font 9.

format(chardata, emit? \\ enabled?())

Formats a chardata-like argument by converting named ANSI sequences into actual ANSI codes.

The named sequences are represented by atoms.

It will also append an IO.ANSI.reset/0 to the chardata when a conversion is performed. If you don’t want this behaviour, use format_fragment/2.

An optional boolean parameter can be passed to enable or disable emitting actual ANSI codes. When false, no ANSI codes will emitted. By default checks if ANSI is enabled using the enabled?/0 function.

Examples

iex> IO.ANSI.format(["Hello, ", :red, :bright, "world!"], true)
[[[[[[], "Hello, "] | "\e[31m"] | "\e[1m"], "world!"] | "\e[0m"]

format_fragment(chardata, emit? \\ enabled?())

Formats a chardata-like argument by converting named ANSI sequences into actual ANSI codes.

The named sequences are represented by atoms.

An optional boolean parameter can be passed to enable or disable emitting actual ANSI codes. When false, no ANSI codes will emitted. By default checks if ANSI is enabled using the enabled?/0 function.

Examples

iex> IO.ANSI.format_fragment([:bright, 'Word'], true)
[[[[[[] | "\e[1m"], 87], 111], 114], 100]

framed()

Framed.

green()

Sets foreground color to green.

green_background()

Sets background color to green.

home()

Sends cursor home.

inverse()

Image: negative. Swap foreground and background.

inverse_off()

Image: positive. Normal foreground and background.

italic()

Italic: on. Not widely supported. Sometimes treated as inverse.

light_black()

Sets foreground color to light black.

light_black_background()

Sets background color to light black.

light_blue()

Sets foreground color to light blue.

light_blue_background()

Sets background color to light blue.

light_cyan()

Sets foreground color to light cyan.

light_cyan_background()

Sets background color to light cyan.

light_green()

Sets foreground color to light green.

light_green_background()

Sets background color to light green.

light_magenta()

Sets foreground color to light magenta.

light_magenta_background()

Sets background color to light magenta.

light_red()

Sets foreground color to light red.

light_red_background()

Sets background color to light red.

light_white()

Sets foreground color to light white.

light_white_background()

Sets background color to light white.

light_yellow()

Sets foreground color to light yellow.

light_yellow_background()

Sets background color to light yellow.

magenta()

Sets foreground color to magenta.

magenta_background()

Sets background color to magenta.

no_underline()

Underline: none.

normal()

Normal color or intensity.

not_framed_encircled()

Not framed or encircled.

not_italic()

Not italic.

not_overlined()

Not overlined.

overlined()

Overlined.

primary_font()

Sets primary (default) font.

red()

Sets foreground color to red.

red_background()

Sets background color to red.

reset()

Resets all attributes.

reverse()

Image: negative. Swap foreground and background.

reverse_off()

Image: positive. Normal foreground and background.

underline()

Underline: single.

white()

Sets foreground color to white.

white_background()

Sets background color to white.

yellow()

Sets foreground color to yellow.

yellow_background()

Sets background color to yellow.