d-colorize/README.md

d-colorize
====================
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- - -

A partial port of Ruby's [colorize](https://github.com/fazibear/colorize)
library to D.

To put it simply, this is a simple helper for printing colored output to a
terminal.

## Installing
This package is registered in the dub registry as
[colorize](http://code.dlang.org/packages/colorize).

## Usage
```d
import colorize : fg, color, cwriteln, cwritefln;

void main()
{
  cwriteln("This is blue".color(fg.blue));

  auto c = "red";
  cwritefln("This is %s".color(c), c);
}
```
- - -

## Supporting cross-platform color printing
Colorize exports functions for wrapping strings around ANSI color escape
sequences. Simply printing these strings should work fine for any UNIX system.
However, for "colorized" printing to work on Windows, it's necessary to use one
of the exported helper printing functions, provided by
[p0nce](https://github.com/p0nce), also in this module.

Colorizing output works by using the `color` API described below and for Windows
compatibility, we provide functions which parse the escape sequences and call
appropriate system-level. On all platforms other than Windows, these functions
should work just as their `std.stdio` counterparts.

These are:
### cwrite
```d
void cwrite(T...)(T args) if (!is(T[0] : File))
```
#### With an overloaded version for File output:
```d
void cwrite(S...)(File f, S args)
```
###  cwritef
```d
void cwritef(Char, T...)(in Char[] fmt, T args) if (!is(T[0] : File))
```
#### With an overloaded version for File output:
```d
void cwritef(Char, A...)(File f, in Char[] fmt, A args)
```
### cwriteln
```d
void cwriteln(T...)(T args)
```
### cwritefln
```d
void cwritefln(Char, T...)(in Char[] fmt, T args)
```
- - -

## Setting background, foreground and text modes:
```d
string color(
  const string str,
  const fg c,
  const bg b=bg.init,
  const mode m=mode.init
) pure;
```

Wraps a string around color escape sequences.

### Params
* str = The string to wrap with colors and modes
* c   = The foreground color (see the fg enum type)
* b   = The background color (see the bg enum type)
* m   = The text mode        (see the mode enum type)

### Example

```d
color("This is red over green blinking", fg.blue, bg.green, mode.blink)
```

- - -

## Setting background colors:
```d
string color(const string str, const bg b) pure; // alias to background
```

Wraps a string around a background color escape sequence.

### Params
* str = The string to wrap with background color `b`
* b   = The background color (see the bg enum type)

## Example
```d
color("This has a blue background", bg.blue);
background("This has a red background", bg.red);
```

- - -

## Setting text modes:
```d
string color(const string str, const mode m) pure; // alias to `style`
```

Wraps a string around a text mode.

### Params
* str = The string to wrap with style `m`
* m   = The text mode (see the mode enum type)

### Example
```d
color("This text is bold", mode.bold);
style("This text is blinking", mode.blink);
```

## Coloring with strings:
```d
string color(const string str, const string name) pure;
```

Wraps a string around the foreground color, background color or text style
represented by the color `name`. Foreground colors are represented by their enum
key (`"blue"` will be `34`, `"red"` `31`, and so on) and backgrounds/modes are
prefixed with either `"bg_"` or `"mode_"` (thus, `"bg_black"` will be `40`,
`"mode_bold"` `1` and so on).

### Example
```d
color("This text is blue", "blue");
"This is red over blue, blinking"
  .color("red")
  .color("bg_blue")
  .color("mode_blue");
```

### Params

## Available colors and modes
### `fg` enum type (Foreground colors)
Foreground text colors are available through the `fg` enum. Currently available
colors are:
- `fg.init` (39)
- `fg.black` (30)
- `fg.red` (31)
- `fg.green` (32)
- `fg.yellow` (33)
- `fg.blue` (34)
- `fg.magenta` (35)
- `fg.cyan` (36)
- `fg.white` (37)
- `fg.light_black` (90)
- `fg.light_red` (91)
- `fg.light_green` (92)
- `fg.light_yellow` (93)
- `fg.light_blue` (94)
- `fg.light_magenta` (95)
- `fg.light_cyan` (96)
- `fg.light_white` (97)

### `bg` enum type (Background colors)
Background colors are available with the same names through the `bg` enum. This
is because background colors come with an offset of 10 to their foreground
counterparts and we wanted to avoid calculating the offset at runtime.

### `mode` enum type (Text modes)
Text modes are available through the `mode` enum. Currently available text modes
are:
- `mode.init` (0)
- `mode.bold` (1)
- `mode.underline` (4)
- `mode.blink` (5)
- `mode.swap` (7)
- `mode.hide` (8)

## License
Copyright (c) 2014 Pedro Tacla Yamada. Licensed under the MIT license.
Please refer to the [LICENSE](LICENSE) file for more info.