Emilia

Css sprite tool, supports rem, supports output multiple sprites pictures.

Emilia gets stylesheet files and recognizes sprite mark like url(a.png?__sprite), finally output updated stylesheet files as well as sprite pictures. It supports rem and px, also supports numerical conversion. Besides, it tries to be designed easier to fit different frameworks, such as fis3 or webpack.

If you are tend to build sprite pictures according to image resources, maybe you like Lia.

中文文档

Getting started

npm install --save-dev emilia

When used in module.

var Emilia = require('emilia');
var emilia = new Emilia({
    src: ['src/css/*.css'],
    dest: 'build/css/',
    output: 'build/images/',
    cssPath: '../images/',
    unit: 'rem',
    convert: 16
});

emilia.run();

When used in CLI.

$ emilia help

  Usage: emilia [options] [command]

  Commands:

    help                   Output usage information

  Options:

    -s, --src <src>        stylesheet path, use glob patterns
    -d, --dest <dir>       output compiled stylesheet file to <dir>
    -o, --output <dir>     output sprite pictures to <dir>
    --cssPath              image url path
    --prefix               prefix basename of sprite picture
    --algorithm            layout algorithm of sprite pictures
    --padding              padding between images
    --convert              numerical scale
    --unit                 unit of backgound-size and position
    --quiet                disabled output info in the console

Result like this.

/*    origin stylesheet    */
.icon0 {
  background: #ccc url(../images/0.png?__icon) no-repeat;
  background-size: 128px 128px;
}
.icon2 {
  background: url(../images/2.png?__icon) no-repeat;
  background-size: 50px 50px;
}

/*    result stylesheet    */
.icon0 {
  background: #ccc url(../images/sprite-icon.png) no-repeat;
  background-position: 0rem 0rem;
  background-size: 22.875rem 16rem;
}
.icon2 {
  color: #ccc;
  background: url(../images/sprite-icon.png) no-repeat;
  background-position: -16.625rem 0rem;
  background-size: 22.875rem 16rem;
}

Documentation

new Emilia(options)

Constructor for a new Emilia instance

• options Object - Compile parameters
  • src Array
    • desc: Stylesheet path, use glob patterns
    • default: ['**/*.css']
  • dest String
    • desc: output compiled stylesheet files to dir
    • default: 'build/css/'
  • output String
    • desc: output sprite pictures to dir
    • default: 'build/images/'
  • cssPath String
    • desc: image url path
    • default: '../images/'
  • prefix String
    • desc: prefix sprite pictures' basename
    • default: 'sprite-'
  • algorithm String
    • desc: layout algorithm of sprite pictures
    • default: 'binary-tree'
    • value: ['top-down' | 'left-right' | 'diagonal' | 'alt-diagonal' | 'binary-tree']
  • padding Number
    • desc: padding between images
    • default: 10
  • convert Number
    • desc: numerical scale
    • default: 1
  • unit String
    • desc: unit of backgound-size and position
    • default: 'px'
  • quiet Boolean
    • desc: disabled output info in the console
    • default: false

emilia.run()

Start compilation, include emilia.collect and emilia.process.

emilia.collect()

Get stylesheet files and wrap into file object, prepare for compilation

emilia.process()

Analysises stylesheet and recognize sprite mark, creates sprite pictures with coordinates, output both sprite pictures and updated stylesheet files.

Examples

single stylesheet file

emilia = new Emilia({
    src: ['test/fixtures/css/main.css'],
    dest: 'test/tmp/',
    output: 'test/tmp/images/',
    cssPath: './images/'
});
emilia.run();

/* test/fixtures/css/main.css */
.icon4 {
  background: url(../images/4.png?__tom) no-repeat;
}
.icon5 {
  background: url(../images/5.png?__jerry) no-repeat;
}
.icon6 {
  background: url(../images/6.png?__jerry) no-repeat;
}
.icon7 {
  background: url(../images/7.png?__inline) no-repeat;
}

mulit stylesheet file

emilia = new Emilia({
    src: ['test/fixtures/css/multi_*.css'],
    dest: 'test/tmp/',
    output: 'test/tmp/'
}); 
emilia.run();

rem stylesheet

emilia = new Emilia({
    src: ['test/fixtures/css/rem.css'],
    dest: 'test/tmp/',
    output: 'test/tmp/',
    cssPath: './',
    prefix: '',
    algorithm: 'top-down',
    padding: 100,
    unit: 'rem',
    convert: 16,
    quiet: true
});
emilia.run();

inline image

.icon {
    background: url(../images/icon?__inline);
}

use in CLI

$ emilia -s fixtures/css/main.css,fixtures/css/multi_*.css
[warn]: ../images/undefined.png not exists
[warn]: ../images/undefined.png not exists
[info]: Created build/images/sprite-tom.png
[info]: Created build/images/sprite-jerry.png
[info]: Created build/css/main.css
[info]: Created build/css/multi_one.css
[info]: Created build/css/multi_two.css

Test

$ npm run test

Update

• v0.1.1
  1. Update for node v0.12 support
• v0.1.0
  1. Fix fatal bug in windows cause by incorrect usage of child_process.execFile

License

Copyright (c) 2016 cupools

Licensed under the MIT license.