prism-previewer-easing.js
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(function() {
if (
typeof self !== 'undefined' && !self.Prism ||
typeof global !== 'undefined' && !global.Prism
) {
return;
}
var languages = {
'css': true,
'less': true,
'sass': [
{
lang: 'sass',
inside: 'inside',
before: 'punctuation',
root: Prism.languages.sass && Prism.languages.sass['variable-line']
},
{
lang: 'sass',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['property-line']
}
],
'scss': true,
'stylus': [
{
lang: 'stylus',
before: 'hexcode',
inside: 'rest',
root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
},
{
lang: 'stylus',
before: 'hexcode',
inside: 'rest',
root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
}
]
};
Prism.hooks.add('before-highlight', function (env) {
if (env.language && languages[env.language] && !languages[env.language].initialized) {
var lang = languages[env.language];
if (Prism.util.type(lang) !== 'Array') {
lang = [lang];
}
lang.forEach(function(lang) {
var before, inside, root, skip;
if (lang === true) {
before = 'important';
inside = env.language;
lang = env.language;
} else {
before = lang.before || 'important';
inside = lang.inside || lang.lang;
root = lang.root || Prism.languages;
skip = lang.skip;
lang = env.language;
}
if (!skip && Prism.languages[lang]) {
Prism.languages.insertBefore(inside, before, {
'easing': /\bcubic-bezier\((?:-?\d*\.?\d+,\s*){3}-?\d*\.?\d+\)\B|\b(?:linear|ease(?:-in)?(?:-out)?)(?=\s|[;}]|$)/i
}, root);
env.grammar = Prism.languages[lang];
languages[env.language] = {initialized: true};
}
});
}
});
if (Prism.plugins.Previewer) {
new Prism.plugins.Previewer('easing', function (value) {
value = {
'linear': '0,0,1,1',
'ease': '.25,.1,.25,1',
'ease-in': '.42,0,1,1',
'ease-out': '0,0,.58,1',
'ease-in-out':'.42,0,.58,1'
}[value] || value;
var p = value.match(/-?\d*\.?\d+/g);
if(p.length === 4) {
p = p.map(function(p, i) { return (i % 2? 1 - p : p) * 100; });
this.querySelector('path').setAttribute('d', 'M0,100 C' + p[0] + ',' + p[1] + ', ' + p[2] + ',' + p[3] + ', 100,0');
var lines = this.querySelectorAll('line');
lines[0].setAttribute('x2', p[0]);
lines[0].setAttribute('y2', p[1]);
lines[1].setAttribute('x2', p[2]);
lines[1].setAttribute('y2', p[3]);
return true;
}
return false;
}, '*', function () {
this._elt.innerHTML = '<svg viewBox="-20 -20 140 140" width="100" height="100">' +
'<defs>' +
'<marker id="prism-previewer-easing-marker" viewBox="0 0 4 4" refX="2" refY="2" markerUnits="strokeWidth">' +
'<circle cx="2" cy="2" r="1.5" />' +
'</marker>' +
'</defs>' +
'<path d="M0,100 C20,50, 40,30, 100,0" />' +
'<line x1="0" y1="100" x2="20" y2="50" marker-start="url(' + location.href + '#prism-previewer-easing-marker)" marker-end="url(' + location.href + '#prism-previewer-easing-marker)" />' +
'<line x1="100" y1="0" x2="40" y2="30" marker-start="url(' + location.href + '#prism-previewer-easing-marker)" marker-end="url(' + location.href + '#prism-previewer-easing-marker)" />' +
'</svg>';
});
}
}());