hexo/node_modules/prismjs/plugins/previewers/prism-previewers.js

713 lines
20 KiB
JavaScript

(function () {
if (typeof Prism === 'undefined' || typeof document === 'undefined' || !Function.prototype.bind) {
return;
}
var previewers = {
// gradient must be defined before color and angle
'gradient': {
create: (function () {
// Stores already processed gradients so that we don't
// make the conversion every time the previewer is shown
var cache = {};
/**
* Returns a W3C-valid linear gradient
*
* @param {string} prefix Vendor prefix if any ("-moz-", "-webkit-", etc.)
* @param {string} func Gradient function name ("linear-gradient")
* @param {string[]} values Array of the gradient function parameters (["0deg", "red 0%", "blue 100%"])
*/
var convertToW3CLinearGradient = function (prefix, func, values) {
// Default value for angle
var angle = '180deg';
if (/^(?:-?(?:\d+(?:\.\d+)?|\.\d+)(?:deg|rad)|to\b|top|right|bottom|left)/.test(values[0])) {
angle = values.shift();
if (angle.indexOf('to ') < 0) {
// Angle uses old keywords
// W3C syntax uses "to" + opposite keywords
if (angle.indexOf('top') >= 0) {
if (angle.indexOf('left') >= 0) {
angle = 'to bottom right';
} else if (angle.indexOf('right') >= 0) {
angle = 'to bottom left';
} else {
angle = 'to bottom';
}
} else if (angle.indexOf('bottom') >= 0) {
if (angle.indexOf('left') >= 0) {
angle = 'to top right';
} else if (angle.indexOf('right') >= 0) {
angle = 'to top left';
} else {
angle = 'to top';
}
} else if (angle.indexOf('left') >= 0) {
angle = 'to right';
} else if (angle.indexOf('right') >= 0) {
angle = 'to left';
} else if (prefix) {
// Angle is shifted by 90deg in prefixed gradients
if (angle.indexOf('deg') >= 0) {
angle = (90 - parseFloat(angle)) + 'deg';
} else if (angle.indexOf('rad') >= 0) {
angle = (Math.PI / 2 - parseFloat(angle)) + 'rad';
}
}
}
}
return func + '(' + angle + ',' + values.join(',') + ')';
};
/**
* Returns a W3C-valid radial gradient
*
* @param {string} prefix Vendor prefix if any ("-moz-", "-webkit-", etc.)
* @param {string} func Gradient function name ("linear-gradient")
* @param {string[]} values Array of the gradient function parameters (["0deg", "red 0%", "blue 100%"])
*/
var convertToW3CRadialGradient = function (prefix, func, values) {
if (values[0].indexOf('at') < 0) {
// Looks like old syntax
// Default values
var position = 'center';
var shape = 'ellipse';
var size = 'farthest-corner';
if (/\b(?:bottom|center|left|right|top)\b|^\d+/.test(values[0])) {
// Found a position
// Remove angle value, if any
position = values.shift().replace(/\s*-?\d+(?:deg|rad)\s*/, '');
}
if (/\b(?:circle|closest|contain|cover|ellipse|farthest)\b/.test(values[0])) {
// Found a shape and/or size
var shapeSizeParts = values.shift().split(/\s+/);
if (shapeSizeParts[0] && (shapeSizeParts[0] === 'circle' || shapeSizeParts[0] === 'ellipse')) {
shape = shapeSizeParts.shift();
}
if (shapeSizeParts[0]) {
size = shapeSizeParts.shift();
}
// Old keywords are converted to their synonyms
if (size === 'cover') {
size = 'farthest-corner';
} else if (size === 'contain') {
size = 'clothest-side';
}
}
return func + '(' + shape + ' ' + size + ' at ' + position + ',' + values.join(',') + ')';
}
return func + '(' + values.join(',') + ')';
};
/**
* Converts a gradient to a W3C-valid one
* Does not support old webkit syntax (-webkit-gradient(linear...) and -webkit-gradient(radial...))
*
* @param {string} gradient The CSS gradient
*/
var convertToW3CGradient = function (gradient) {
if (cache[gradient]) {
return cache[gradient];
}
var parts = gradient.match(/^(\b|\B-[a-z]{1,10}-)((?:repeating-)?(?:linear|radial)-gradient)/);
// "", "-moz-", etc.
var prefix = parts && parts[1];
// "linear-gradient", "radial-gradient", etc.
var func = parts && parts[2];
var values = gradient.replace(/^(?:\b|\B-[a-z]{1,10}-)(?:repeating-)?(?:linear|radial)-gradient\(|\)$/g, '').split(/\s*,\s*/);
if (func.indexOf('linear') >= 0) {
return cache[gradient] = convertToW3CLinearGradient(prefix, func, values);
} else if (func.indexOf('radial') >= 0) {
return cache[gradient] = convertToW3CRadialGradient(prefix, func, values);
}
return cache[gradient] = func + '(' + values.join(',') + ')';
};
return function () {
new Prism.plugins.Previewer('gradient', function (value) {
this.firstChild.style.backgroundImage = '';
this.firstChild.style.backgroundImage = convertToW3CGradient(value);
return !!this.firstChild.style.backgroundImage;
}, '*', function () {
this._elt.innerHTML = '<div></div>';
});
};
}()),
tokens: {
'gradient': {
pattern: /(?:\b|\B-[a-z]{1,10}-)(?:repeating-)?(?:linear|radial)-gradient\((?:(?:hsl|rgb)a?\(.+?\)|[^\)])+\)/gi,
inside: {
'function': /[\w-]+(?=\()/,
'punctuation': /[(),]/
}
}
},
languages: {
'css': true,
'less': true,
'sass': [
{
lang: 'sass',
before: 'punctuation',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['variable-line']
},
{
lang: 'sass',
before: 'punctuation',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['property-line']
}
],
'scss': true,
'stylus': [
{
lang: 'stylus',
before: 'func',
inside: 'rest',
root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
},
{
lang: 'stylus',
before: 'func',
inside: 'rest',
root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
}
]
}
},
'angle': {
create: function () {
new Prism.plugins.Previewer('angle', function (value) {
var num = parseFloat(value);
var unit = value.match(/[a-z]+$/i);
var max; var percentage;
if (!num || !unit) {
return false;
}
unit = unit[0];
switch (unit) {
case 'deg':
max = 360;
break;
case 'grad':
max = 400;
break;
case 'rad':
max = 2 * Math.PI;
break;
case 'turn':
max = 1;
}
percentage = 100 * num / max;
percentage %= 100;
this[(num < 0 ? 'set' : 'remove') + 'Attribute']('data-negative', '');
this.querySelector('circle').style.strokeDasharray = Math.abs(percentage) + ',500';
return true;
}, '*', function () {
this._elt.innerHTML = '<svg viewBox="0 0 64 64">' +
'<circle r="16" cy="32" cx="32"></circle>' +
'</svg>';
});
},
tokens: {
'angle': /(?:\b|\B-|(?=\B\.))(?:\d+(?:\.\d+)?|\.\d+)(?:deg|g?rad|turn)\b/i
},
languages: {
'css': true,
'less': true,
'markup': {
lang: 'markup',
before: 'punctuation',
inside: 'inside',
root: Prism.languages.markup && Prism.languages.markup['tag'].inside['attr-value']
},
'sass': [
{
lang: 'sass',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['property-line']
},
{
lang: 'sass',
before: 'operator',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['variable-line']
}
],
'scss': true,
'stylus': [
{
lang: 'stylus',
before: 'func',
inside: 'rest',
root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
},
{
lang: 'stylus',
before: 'func',
inside: 'rest',
root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
}
]
}
},
'color': {
create: function () {
new Prism.plugins.Previewer('color', function (value) {
this.style.backgroundColor = '';
this.style.backgroundColor = value;
return !!this.style.backgroundColor;
});
},
tokens: {
'color': [Prism.languages.css['hexcode']].concat(Prism.languages.css['color'])
},
languages: {
// CSS extras is required, so css and scss are not necessary
'css': false,
'less': true,
'markup': {
lang: 'markup',
before: 'punctuation',
inside: 'inside',
root: Prism.languages.markup && Prism.languages.markup['tag'].inside['attr-value']
},
'sass': [
{
lang: 'sass',
before: 'punctuation',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['variable-line']
},
{
lang: 'sass',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['property-line']
}
],
'scss': false,
'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
}
]
}
},
'easing': {
create: function () {
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+)?|\.\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(#prism-previewer-easing-marker)" marker-end="url(#prism-previewer-easing-marker)" />' +
'<line x1="100" y1="0" x2="40" y2="30" marker-start="url(#prism-previewer-easing-marker)" marker-end="url(#prism-previewer-easing-marker)" />' +
'</svg>';
});
},
tokens: {
'easing': {
pattern: /\bcubic-bezier\((?:-?(?:\d+(?:\.\d+)?|\.\d+),\s*){3}-?(?:\d+(?:\.\d+)?|\.\d+)\)\B|\b(?:ease(?:-in)?(?:-out)?|linear)(?=\s|[;}]|$)/i,
inside: {
'function': /[\w-]+(?=\()/,
'punctuation': /[(),]/
}
}
},
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
}
]
}
},
'time': {
create: function () {
new Prism.plugins.Previewer('time', function (value) {
var num = parseFloat(value);
var unit = value.match(/[a-z]+$/i);
if (!num || !unit) {
return false;
}
unit = unit[0];
this.querySelector('circle').style.animationDuration = 2 * num + unit;
return true;
}, '*', function () {
this._elt.innerHTML = '<svg viewBox="0 0 64 64">' +
'<circle r="16" cy="32" cx="32"></circle>' +
'</svg>';
});
},
tokens: {
'time': /(?:\b|\B-|(?=\B\.))(?:\d+(?:\.\d+)?|\.\d+)m?s\b/i
},
languages: {
'css': true,
'less': true,
'markup': {
lang: 'markup',
before: 'punctuation',
inside: 'inside',
root: Prism.languages.markup && Prism.languages.markup['tag'].inside['attr-value']
},
'sass': [
{
lang: 'sass',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['property-line']
},
{
lang: 'sass',
before: 'operator',
inside: 'inside',
root: Prism.languages.sass && Prism.languages.sass['variable-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
}
]
}
}
};
/**
* Returns the absolute X, Y offsets for an element
*
* @param {HTMLElement} element
* @returns {{top: number, right: number, bottom: number, left: number, width: number, height: number}}
*/
var getOffset = function (element) {
var elementBounds = element.getBoundingClientRect();
var left = elementBounds.left;
var top = elementBounds.top;
var documentBounds = document.documentElement.getBoundingClientRect();
left -= documentBounds.left;
top -= documentBounds.top;
return {
top: top,
right: innerWidth - left - elementBounds.width,
bottom: innerHeight - top - elementBounds.height,
left: left,
width: elementBounds.width,
height: elementBounds.height
};
};
var TOKEN_CLASS = 'token';
var ACTIVE_CLASS = 'active';
var FLIPPED_CLASS = 'flipped';
/**
* Previewer constructor
*
* @param {string} type Unique previewer type
* @param {Function} updater Function that will be called on mouseover.
* @param {string[]|string} [supportedLanguages] Aliases of the languages this previewer must be enabled for. Defaults to "*", all languages.
* @param {Function} [initializer] Function that will be called on initialization.
* @class
*/
var Previewer = function (type, updater, supportedLanguages, initializer) {
this._elt = null;
this._type = type;
this._token = null;
this.updater = updater;
this._mouseout = this.mouseout.bind(this);
this.initializer = initializer;
var self = this;
if (!supportedLanguages) {
supportedLanguages = ['*'];
}
if (!Array.isArray(supportedLanguages)) {
supportedLanguages = [supportedLanguages];
}
supportedLanguages.forEach(function (lang) {
if (typeof lang !== 'string') {
lang = lang.lang;
}
if (!Previewer.byLanguages[lang]) {
Previewer.byLanguages[lang] = [];
}
if (Previewer.byLanguages[lang].indexOf(self) < 0) {
Previewer.byLanguages[lang].push(self);
}
});
Previewer.byType[type] = this;
};
/**
* Creates the HTML element for the previewer.
*/
Previewer.prototype.init = function () {
if (this._elt) {
return;
}
this._elt = document.createElement('div');
this._elt.className = 'prism-previewer prism-previewer-' + this._type;
document.body.appendChild(this._elt);
if (this.initializer) {
this.initializer();
}
};
/**
* @param {Element} token
* @returns {boolean}
*/
Previewer.prototype.isDisabled = function (token) {
do {
if (token.hasAttribute && token.hasAttribute('data-previewers')) {
var previewers = token.getAttribute('data-previewers');
return (previewers || '').split(/\s+/).indexOf(this._type) === -1;
}
} while ((token = token.parentNode));
return false;
};
/**
* Checks the class name of each hovered element
*
* @param {Element} token
*/
Previewer.prototype.check = function (token) {
if (token.classList.contains(TOKEN_CLASS) && this.isDisabled(token)) {
return;
}
do {
if (token.classList && token.classList.contains(TOKEN_CLASS) && token.classList.contains(this._type)) {
break;
}
} while ((token = token.parentNode));
if (token && token !== this._token) {
this._token = token;
this.show();
}
};
/**
* Called on mouseout
*/
Previewer.prototype.mouseout = function () {
this._token.removeEventListener('mouseout', this._mouseout, false);
this._token = null;
this.hide();
};
/**
* Shows the previewer positioned properly for the current token.
*/
Previewer.prototype.show = function () {
if (!this._elt) {
this.init();
}
if (!this._token) {
return;
}
if (this.updater.call(this._elt, this._token.textContent)) {
this._token.addEventListener('mouseout', this._mouseout, false);
var offset = getOffset(this._token);
this._elt.classList.add(ACTIVE_CLASS);
if (offset.top - this._elt.offsetHeight > 0) {
this._elt.classList.remove(FLIPPED_CLASS);
this._elt.style.top = offset.top + 'px';
this._elt.style.bottom = '';
} else {
this._elt.classList.add(FLIPPED_CLASS);
this._elt.style.bottom = offset.bottom + 'px';
this._elt.style.top = '';
}
this._elt.style.left = offset.left + Math.min(200, offset.width / 2) + 'px';
} else {
this.hide();
}
};
/**
* Hides the previewer.
*/
Previewer.prototype.hide = function () {
this._elt.classList.remove(ACTIVE_CLASS);
};
/**
* Map of all registered previewers by language
*
* @type {{}}
*/
Previewer.byLanguages = {};
/**
* Map of all registered previewers by type
*
* @type {{}}
*/
Previewer.byType = {};
/**
* Initializes the mouseover event on the code block.
*
* @param {HTMLElement} elt The code block (env.element)
* @param {string} lang The language (env.language)
*/
Previewer.initEvents = function (elt, lang) {
var previewers = [];
if (Previewer.byLanguages[lang]) {
previewers = previewers.concat(Previewer.byLanguages[lang]);
}
if (Previewer.byLanguages['*']) {
previewers = previewers.concat(Previewer.byLanguages['*']);
}
elt.addEventListener('mouseover', function (e) {
var target = e.target;
previewers.forEach(function (previewer) {
previewer.check(target);
});
}, false);
};
Prism.plugins.Previewer = Previewer;
Prism.hooks.add('before-highlight', function (env) {
for (var previewer in previewers) {
var languages = previewers[previewer].languages;
if (env.language && languages[env.language] && !languages[env.language].initialized) {
var lang = languages[env.language];
if (!Array.isArray(lang)) {
lang = [lang];
}
lang.forEach(function (lang) {
var before; var inside; var root; var 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, previewers[previewer].tokens, root);
env.grammar = Prism.languages[lang];
languages[env.language] = { initialized: true };
}
});
}
}
});
// Initialize the previewers only when needed
Prism.hooks.add('after-highlight', function (env) {
if (Previewer.byLanguages['*'] || Previewer.byLanguages[env.language]) {
Previewer.initEvents(env.element, env.language);
}
});
for (var previewer in previewers) {
previewers[previewer].create();
}
}());