713 lines
20 KiB
JavaScript
713 lines
20 KiB
JavaScript
(function() {
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if (typeof Prism === 'undefined' || typeof document === 'undefined' || !Function.prototype.bind) {
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return;
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}
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var previewers = {
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// gradient must be defined before color and angle
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'gradient': {
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create: (function () {
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// Stores already processed gradients so that we don't
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// make the conversion every time the previewer is shown
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var cache = {};
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/**
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* Returns a W3C-valid linear gradient
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*
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* @param {string} prefix Vendor prefix if any ("-moz-", "-webkit-", etc.)
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* @param {string} func Gradient function name ("linear-gradient")
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* @param {string[]} values Array of the gradient function parameters (["0deg", "red 0%", "blue 100%"])
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*/
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var convertToW3CLinearGradient = function(prefix, func, values) {
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// Default value for angle
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var angle = '180deg';
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if (/^(?:-?(?:\d+(?:\.\d+)?|\.\d+)(?:deg|rad)|to\b|top|right|bottom|left)/.test(values[0])) {
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angle = values.shift();
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if (angle.indexOf('to ') < 0) {
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// Angle uses old keywords
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// W3C syntax uses "to" + opposite keywords
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if (angle.indexOf('top') >= 0) {
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if (angle.indexOf('left') >= 0) {
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angle = 'to bottom right';
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} else if (angle.indexOf('right') >= 0) {
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angle = 'to bottom left';
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} else {
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angle = 'to bottom';
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}
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} else if (angle.indexOf('bottom') >= 0) {
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if (angle.indexOf('left') >= 0) {
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angle = 'to top right';
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} else if (angle.indexOf('right') >= 0) {
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angle = 'to top left';
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} else {
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angle = 'to top';
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}
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} else if (angle.indexOf('left') >= 0) {
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angle = 'to right';
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} else if (angle.indexOf('right') >= 0) {
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angle = 'to left';
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} else if (prefix) {
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// Angle is shifted by 90deg in prefixed gradients
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if (angle.indexOf('deg') >= 0) {
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angle = (90 - parseFloat(angle)) + 'deg';
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} else if (angle.indexOf('rad') >= 0) {
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angle = (Math.PI / 2 - parseFloat(angle)) + 'rad';
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}
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}
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}
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}
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return func + '(' + angle + ',' + values.join(',') + ')';
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};
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/**
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* Returns a W3C-valid radial gradient
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*
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* @param {string} prefix Vendor prefix if any ("-moz-", "-webkit-", etc.)
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* @param {string} func Gradient function name ("linear-gradient")
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* @param {string[]} values Array of the gradient function parameters (["0deg", "red 0%", "blue 100%"])
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*/
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var convertToW3CRadialGradient = function(prefix, func, values) {
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if (values[0].indexOf('at') < 0) {
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// Looks like old syntax
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// Default values
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var position = 'center';
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var shape = 'ellipse';
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var size = 'farthest-corner';
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if (/\bcenter|top|right|bottom|left\b|^\d+/.test(values[0])) {
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// Found a position
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// Remove angle value, if any
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position = values.shift().replace(/\s*-?\d+(?:rad|deg)\s*/, '');
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}
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if (/\bcircle|ellipse|closest|farthest|contain|cover\b/.test(values[0])) {
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// Found a shape and/or size
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var shapeSizeParts = values.shift().split(/\s+/);
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if (shapeSizeParts[0] && (shapeSizeParts[0] === 'circle' || shapeSizeParts[0] === 'ellipse')) {
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shape = shapeSizeParts.shift();
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}
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if (shapeSizeParts[0]) {
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size = shapeSizeParts.shift();
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}
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// Old keywords are converted to their synonyms
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if (size === 'cover') {
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size = 'farthest-corner';
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} else if (size === 'contain') {
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size = 'clothest-side';
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}
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}
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return func + '(' + shape + ' ' + size + ' at ' + position + ',' + values.join(',') + ')';
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}
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return func + '(' + values.join(',') + ')';
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};
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/**
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* Converts a gradient to a W3C-valid one
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* Does not support old webkit syntax (-webkit-gradient(linear...) and -webkit-gradient(radial...))
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*
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* @param {string} gradient The CSS gradient
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*/
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var convertToW3CGradient = function(gradient) {
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if (cache[gradient]) {
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return cache[gradient];
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}
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var parts = gradient.match(/^(\b|\B-[a-z]{1,10}-)((?:repeating-)?(?:linear|radial)-gradient)/);
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// "", "-moz-", etc.
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var prefix = parts && parts[1];
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// "linear-gradient", "radial-gradient", etc.
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var func = parts && parts[2];
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var values = gradient.replace(/^(?:\b|\B-[a-z]{1,10}-)(?:repeating-)?(?:linear|radial)-gradient\(|\)$/g, '').split(/\s*,\s*/);
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if (func.indexOf('linear') >= 0) {
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return cache[gradient] = convertToW3CLinearGradient(prefix, func, values);
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} else if (func.indexOf('radial') >= 0) {
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return cache[gradient] = convertToW3CRadialGradient(prefix, func, values);
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}
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return cache[gradient] = func + '(' + values.join(',') + ')';
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};
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return function () {
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new Prism.plugins.Previewer('gradient', function(value) {
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this.firstChild.style.backgroundImage = '';
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this.firstChild.style.backgroundImage = convertToW3CGradient(value);
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return !!this.firstChild.style.backgroundImage;
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}, '*', function () {
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this._elt.innerHTML = '<div></div>';
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});
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};
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}()),
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tokens: {
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'gradient': {
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pattern: /(?:\b|\B-[a-z]{1,10}-)(?:repeating-)?(?:linear|radial)-gradient\((?:(?:rgb|hsl)a?\(.+?\)|[^\)])+\)/gi,
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inside: {
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'function': /[\w-]+(?=\()/,
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'punctuation': /[(),]/
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}
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}
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},
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languages: {
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'css': true,
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'less': true,
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'sass': [
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{
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lang: 'sass',
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before: 'punctuation',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['variable-line']
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},
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{
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lang: 'sass',
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before: 'punctuation',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['property-line']
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}
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],
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'scss': true,
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'stylus': [
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{
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lang: 'stylus',
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before: 'func',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
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},
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{
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lang: 'stylus',
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before: 'func',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
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}
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]
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}
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},
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'angle': {
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create: function () {
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new Prism.plugins.Previewer('angle', function(value) {
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var num = parseFloat(value);
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var unit = value.match(/[a-z]+$/i);
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var max, percentage;
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if (!num || !unit) {
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return false;
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}
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unit = unit[0];
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switch(unit) {
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case 'deg':
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max = 360;
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break;
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case 'grad':
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max = 400;
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break;
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case 'rad':
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max = 2 * Math.PI;
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break;
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case 'turn':
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max = 1;
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}
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percentage = 100 * num/max;
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percentage %= 100;
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this[(num < 0? 'set' : 'remove') + 'Attribute']('data-negative', '');
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this.querySelector('circle').style.strokeDasharray = Math.abs(percentage) + ',500';
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return true;
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}, '*', function () {
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this._elt.innerHTML = '<svg viewBox="0 0 64 64">' +
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'<circle r="16" cy="32" cx="32"></circle>' +
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'</svg>';
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});
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},
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tokens: {
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'angle': /(?:\b|\B-|(?=\B\.))(?:\d+(?:\.\d+)?|\.\d+)(?:deg|g?rad|turn)\b/i
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},
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languages: {
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'css': true,
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'less': true,
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'markup': {
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lang: 'markup',
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before: 'punctuation',
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inside: 'inside',
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root: Prism.languages.markup && Prism.languages.markup['tag'].inside['attr-value']
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},
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'sass': [
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{
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lang: 'sass',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['property-line']
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},
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{
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lang: 'sass',
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before: 'operator',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['variable-line']
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}
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],
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'scss': true,
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'stylus': [
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{
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lang: 'stylus',
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before: 'func',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
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},
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{
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lang: 'stylus',
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before: 'func',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
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}
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]
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}
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},
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'color': {
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create: function () {
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new Prism.plugins.Previewer('color', function(value) {
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this.style.backgroundColor = '';
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this.style.backgroundColor = value;
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return !!this.style.backgroundColor;
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});
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},
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tokens: {
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'color': [Prism.languages.css['hexcode']].concat(Prism.languages.css['color'])
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},
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languages: {
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// CSS extras is required, so css and scss are not necessary
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'css': false,
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'less': true,
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'markup': {
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lang: 'markup',
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before: 'punctuation',
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inside: 'inside',
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root: Prism.languages.markup && Prism.languages.markup['tag'].inside['attr-value']
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},
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'sass': [
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{
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lang: 'sass',
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before: 'punctuation',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['variable-line']
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},
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{
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lang: 'sass',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['property-line']
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}
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],
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'scss': false,
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'stylus': [
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{
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lang: 'stylus',
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before: 'hexcode',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
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},
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{
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lang: 'stylus',
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before: 'hexcode',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
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}
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]
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}
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},
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'easing': {
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create: function () {
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new Prism.plugins.Previewer('easing', function (value) {
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value = {
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'linear': '0,0,1,1',
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'ease': '.25,.1,.25,1',
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'ease-in': '.42,0,1,1',
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'ease-out': '0,0,.58,1',
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'ease-in-out':'.42,0,.58,1'
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}[value] || value;
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var p = value.match(/-?(?:\d+(?:\.\d+)?|\.\d+)/g);
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if(p.length === 4) {
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p = p.map(function(p, i) { return (i % 2? 1 - p : p) * 100; });
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this.querySelector('path').setAttribute('d', 'M0,100 C' + p[0] + ',' + p[1] + ', ' + p[2] + ',' + p[3] + ', 100,0');
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var lines = this.querySelectorAll('line');
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lines[0].setAttribute('x2', p[0]);
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lines[0].setAttribute('y2', p[1]);
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lines[1].setAttribute('x2', p[2]);
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lines[1].setAttribute('y2', p[3]);
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return true;
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}
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return false;
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}, '*', function () {
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this._elt.innerHTML = '<svg viewBox="-20 -20 140 140" width="100" height="100">' +
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'<defs>' +
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'<marker id="prism-previewer-easing-marker" viewBox="0 0 4 4" refX="2" refY="2" markerUnits="strokeWidth">' +
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'<circle cx="2" cy="2" r="1.5" />' +
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'</marker>' +
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'</defs>' +
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'<path d="M0,100 C20,50, 40,30, 100,0" />' +
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'<line x1="0" y1="100" x2="20" y2="50" marker-start="url(#prism-previewer-easing-marker)" marker-end="url(#prism-previewer-easing-marker)" />' +
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'<line x1="100" y1="0" x2="40" y2="30" marker-start="url(#prism-previewer-easing-marker)" marker-end="url(#prism-previewer-easing-marker)" />' +
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'</svg>';
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});
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},
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tokens: {
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'easing': {
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pattern: /\bcubic-bezier\((?:-?(?:\d+(?:\.\d+)?|\.\d+),\s*){3}-?(?:\d+(?:\.\d+)?|\.\d+)\)\B|\b(?:linear|ease(?:-in)?(?:-out)?)(?=\s|[;}]|$)/i,
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inside: {
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'function': /[\w-]+(?=\()/,
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'punctuation': /[(),]/
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}
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}
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},
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languages: {
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'css': true,
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'less': true,
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'sass': [
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{
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lang: 'sass',
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inside: 'inside',
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before: 'punctuation',
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root: Prism.languages.sass && Prism.languages.sass['variable-line']
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},
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{
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lang: 'sass',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['property-line']
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}
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],
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'scss': true,
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'stylus': [
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{
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lang: 'stylus',
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before: 'hexcode',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
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},
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{
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lang: 'stylus',
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before: 'hexcode',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
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}
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]
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}
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},
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'time': {
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create: function () {
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new Prism.plugins.Previewer('time', function(value) {
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var num = parseFloat(value);
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var unit = value.match(/[a-z]+$/i);
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if (!num || !unit) {
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return false;
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}
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unit = unit[0];
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this.querySelector('circle').style.animationDuration = 2 * num + unit;
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return true;
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}, '*', function () {
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this._elt.innerHTML = '<svg viewBox="0 0 64 64">' +
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'<circle r="16" cy="32" cx="32"></circle>' +
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'</svg>';
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});
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},
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tokens: {
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'time': /(?:\b|\B-|(?=\B\.))(?:\d+(?:\.\d+)?|\.\d+)m?s\b/i
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},
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languages: {
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'css': true,
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'less': true,
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'markup': {
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lang: 'markup',
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before: 'punctuation',
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inside: 'inside',
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root: Prism.languages.markup && Prism.languages.markup['tag'].inside['attr-value']
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},
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'sass': [
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{
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lang: 'sass',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['property-line']
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},
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{
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lang: 'sass',
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before: 'operator',
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inside: 'inside',
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root: Prism.languages.sass && Prism.languages.sass['variable-line']
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}
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],
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'scss': true,
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'stylus': [
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{
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lang: 'stylus',
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before: 'hexcode',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
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},
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{
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lang: 'stylus',
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before: 'hexcode',
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inside: 'rest',
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root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
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}
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]
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}
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}
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};
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/**
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* Returns the absolute X, Y offsets for an element
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*
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* @param {HTMLElement} element
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* @returns {{top: number, right: number, bottom: number, left: number, width: number, height: number}}
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*/
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var getOffset = function (element) {
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var elementBounds = element.getBoundingClientRect();
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var left = elementBounds.left;
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var top = elementBounds.top;
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var documentBounds = document.documentElement.getBoundingClientRect();
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left -= documentBounds.left;
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top -= documentBounds.top;
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return {
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top: top,
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right: innerWidth - left - elementBounds.width,
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bottom: innerHeight - top - elementBounds.height,
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left: left,
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width: elementBounds.width,
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height: elementBounds.height
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};
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};
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var TOKEN_CLASS = 'token';
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var ACTIVE_CLASS = 'active';
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var FLIPPED_CLASS = 'flipped';
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/**
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* Previewer constructor
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*
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* @param {string} type Unique previewer type
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* @param {Function} updater Function that will be called on mouseover.
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* @param {string[]|string} [supportedLanguages] Aliases of the languages this previewer must be enabled for. Defaults to "*", all languages.
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* @param {Function} [initializer] Function that will be called on initialization.
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* @class
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*/
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var Previewer = function (type, updater, supportedLanguages, initializer) {
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this._elt = null;
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this._type = type;
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this._token = null;
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this.updater = updater;
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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, 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, 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();
|
|
}
|
|
|
|
}());
|