# rs3a
This library provides a structural representation of [3a ascii animations format](https://github.com/DomesticMoth/3a) and methods for reading and writing it.  
This lib on [crates.io](https://crates.io/crates/rs3a) 
- [Used in](#used-in)
- [Usage](#usage)
- [Short API description](#short-api-description)
  - [Structs](#structs)
  - [Functions](#functions)
## Used in
- [aaa](https://github.com/DomesticMoth/aaa) - Tui tool for 3a files rendering 
## Usage
Add this to your `Cargo.toml`:
```toml
[dependencies]
rs3a = "1"
```
Here's a simple example that parsing a string in 3a format and displaying a header:  
```rust
use rs3a;

const COLORTABLE_EXAMPLE: &str = "	
width 32
height 19
loop false
colors full
title colortable demo
author Moth

in ' ab '                       ffffffffffffffffffffffffffffffff00000000000000000000000000000000
a-foreground, b-background      ffffffffffffffffffffffffffffffff00000000000000000000000000000000
                                ffffffffffffffffffffffffffffffff00000000000000000000000000000000
 00  01  02  03  04  05  06  07 0000000000000000000000000000000000001111222233334444555566667777
 10  11  12  13  14  15  16  17 1111111111111111111111111111111100001111222233334444555566667777
 20  21  22  23  24  25  26  27 2222222222222222222222222222222200001111222233334444555566667777
 30  31  32  33  34  35  36  37 3333333333333333333333333333333300001111222233334444555566667777
 40  41  42  43  44  45  46  47 4444444444444444444444444444444400001111222233334444555566667777
 50  51  52  53  54  55  56  57 5555555555555555555555555555555500001111222233334444555566667777
 60  61  62  63  64  65  66  67 6666666666666666666666666666666600001111222233334444555566667777
 70  71  72  73  74  75  76  77 7777777777777777777777777777777700001111222233334444555566667777
 80  81  82  83  84  85  86  87 8888888888888888888888888888888800001111222233334444555566667777
 90  91  92  93  94  95  96  97 9999999999999999999999999999999900001111222233334444555566667777
 a0  a1  a2  a3  a4  a5  a6  a7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa00001111222233334444555566667777
 b0  b1  b2  b3  b4  b5  b6  b7 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb00001111222233334444555566667777
 c0  c1  c2  c3  c4  c5  c6  c7 cccccccccccccccccccccccccccccccc00001111222233334444555566667777
 d0  d1  d2  d3  d4  d5  d6  d7 dddddddddddddddddddddddddddddddd00001111222233334444555566667777
 e0  e1  e2  e3  e4  e5  e6  e7 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee00001111222233334444555566667777
 f0  f1  f2  f3  f4  f5  f6  f7 ffffffffffffffffffffffffffffffff00001111222233334444555566667777";

fn main() {
    let art = rs3a::load(COLORTABLE_EXAMPLE.to_string()).unwrap();
    println!("{:?}", art.header);
}
```
## Short API description
### Structs
The core of the library is the Art type, which implements the 3a structure:  
```rust
struct Art{
    pub header: Header,
    pub body: Body,
}
```
Header type contains information about the header of 3a file:  
```rust
struct Header{
    width: u16,
    height: u16,
    delay: u16,
    loop_enable: bool,
    color_mod: ColorMod,
    utf8: bool,
    datacols: u16,
    preview: u16,
    audio: Option<String>,
    title: Option<String>,
    author: Option<String>,
}
```
Body type contains an array of frames, where each frame is an array of rows, and each row is an array of row fragments:  
```rust
struct Body{
    frames: Vec<Frame>
}
type Frame = Vec<Row>;
type Row = Vec<RowFragment>;
```
Each RowFragment is a set of consecutive symbols with the same values of foreground and background colors:  
```rust
struct RowFragment{
    text: String,
    fg_color: Option<Color>,
    bg_color: Option<Color>,
}
```
### Functions
`load` and `save` functions allow you to convert strings to `Art` and back.  
`load_file` and `save_file` functions allow you to read 3a files to `Art` and write `Art` to 3a files.