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Diffstat (limited to 'static/vendor/revealjs/reveal.js-master/plugin/highlight/plugin.js')
| -rw-r--r-- | static/vendor/revealjs/reveal.js-master/plugin/highlight/plugin.js | 419 |
1 files changed, 0 insertions, 419 deletions
diff --git a/static/vendor/revealjs/reveal.js-master/plugin/highlight/plugin.js b/static/vendor/revealjs/reveal.js-master/plugin/highlight/plugin.js deleted file mode 100644 index f6cc624..0000000 --- a/static/vendor/revealjs/reveal.js-master/plugin/highlight/plugin.js +++ /dev/null @@ -1,419 +0,0 @@ -import hljs from 'highlight.js' - -/* highlightjs-line-numbers.js 2.6.0 | (C) 2018 Yauheni Pakala | MIT License | github.com/wcoder/highlightjs-line-numbers.js */ -/* Edited by Hakim for reveal.js; removed async timeout */ -!function(n,e){"use strict";function t(){var n=e.createElement("style");n.type="text/css",n.innerHTML=g(".{0}{border-collapse:collapse}.{0} td{padding:0}.{1}:before{content:attr({2})}",[v,L,b]),e.getElementsByTagName("head")[0].appendChild(n)}function r(t){"interactive"===e.readyState||"complete"===e.readyState?i(t):n.addEventListener("DOMContentLoaded",function(){i(t)})}function i(t){try{var r=e.querySelectorAll("code.hljs,code.nohighlight");for(var i in r)r.hasOwnProperty(i)&&l(r[i],t)}catch(o){n.console.error("LineNumbers error: ",o)}}function l(n,e){"object"==typeof n&&f(function(){n.innerHTML=s(n,e)})}function o(n,e){if("string"==typeof n){var t=document.createElement("code");return t.innerHTML=n,s(t,e)}}function s(n,e){e=e||{singleLine:!1};var t=e.singleLine?0:1;return c(n),a(n.innerHTML,t)}function a(n,e){var t=u(n);if(""===t[t.length-1].trim()&&t.pop(),t.length>e){for(var r="",i=0,l=t.length;i<l;i++)r+=g('<tr><td class="{0}"><div class="{1} {2}" {3}="{5}"></div></td><td class="{4}"><div class="{1}">{6}</div></td></tr>',[j,m,L,b,p,i+1,t[i].length>0?t[i]:" "]);return g('<table class="{0}">{1}</table>',[v,r])}return n}function c(n){var e=n.childNodes;for(var t in e)if(e.hasOwnProperty(t)){var r=e[t];h(r.textContent)>0&&(r.childNodes.length>0?c(r):d(r.parentNode))}}function d(n){var e=n.className;if(/hljs-/.test(e)){for(var t=u(n.innerHTML),r=0,i="";r<t.length;r++){var l=t[r].length>0?t[r]:" ";i+=g('<span class="{0}">{1}</span>\n',[e,l])}n.innerHTML=i.trim()}}function u(n){return 0===n.length?[]:n.split(y)}function h(n){return(n.trim().match(y)||[]).length}function f(e){e()}function g(n,e){return n.replace(/\{(\d+)\}/g,function(n,t){return e[t]?e[t]:n})}var v="hljs-ln",m="hljs-ln-line",p="hljs-ln-code",j="hljs-ln-numbers",L="hljs-ln-n",b="data-line-number",y=/\r\n|\r|\n/g;hljs?(hljs.initLineNumbersOnLoad=r,hljs.lineNumbersBlock=l,hljs.lineNumbersValue=o,t()):n.console.error("highlight.js not detected!")}(window,document); - -/*! - * reveal.js plugin that adds syntax highlight support. - */ - -const Plugin = { - - id: 'highlight', - - HIGHLIGHT_STEP_DELIMITER: '|', - HIGHLIGHT_LINE_DELIMITER: ',', - HIGHLIGHT_LINE_RANGE_DELIMITER: '-', - - hljs: hljs, - - /** - * Highlights code blocks withing the given deck. - * - * Note that this can be called multiple times if - * there are multiple presentations on one page. - * - * @param {Reveal} reveal the reveal.js instance - */ - init: function( reveal ) { - - // Read the plugin config options and provide fallbacks - var config = reveal.getConfig().highlight || {}; - config.highlightOnLoad = typeof config.highlightOnLoad === 'boolean' ? config.highlightOnLoad : true; - config.escapeHTML = typeof config.escapeHTML === 'boolean' ? config.escapeHTML : true; - - [].slice.call( reveal.getRevealElement().querySelectorAll( 'pre code' ) ).forEach( function( block ) { - - // Trim whitespace if the "data-trim" attribute is present - if( block.hasAttribute( 'data-trim' ) && typeof block.innerHTML.trim === 'function' ) { - block.innerHTML = betterTrim( block ); - } - - // Escape HTML tags unless the "data-noescape" attrbute is present - if( config.escapeHTML && !block.hasAttribute( 'data-noescape' )) { - block.innerHTML = block.innerHTML.replace( /</g,"<").replace(/>/g, '>' ); - } - - // Re-highlight when focus is lost (for contenteditable code) - block.addEventListener( 'focusout', function( event ) { - hljs.highlightBlock( event.currentTarget ); - }, false ); - - if( config.highlightOnLoad ) { - Plugin.highlightBlock( block ); - } - - } ); - - // If we're printing to PDF, scroll the code highlights of - // all blocks in the deck into view at once - reveal.on( 'pdf-ready', function() { - [].slice.call( reveal.getRevealElement().querySelectorAll( 'pre code[data-line-numbers].current-fragment' ) ).forEach( function( block ) { - Plugin.scrollHighlightedLineIntoView( block, {}, true ); - } ); - } ); - - }, - - /** - * Highlights a code block. If the <code> node has the - * 'data-line-numbers' attribute we also generate slide - * numbers. - * - * If the block contains multiple line highlight steps, - * we clone the block and create a fragment for each step. - */ - highlightBlock: function( block ) { - - hljs.highlightBlock( block ); - - // Don't generate line numbers for empty code blocks - if( block.innerHTML.trim().length === 0 ) return; - - if( block.hasAttribute( 'data-line-numbers' ) ) { - hljs.lineNumbersBlock( block, { singleLine: true } ); - - var scrollState = { currentBlock: block }; - - // If there is at least one highlight step, generate - // fragments - var highlightSteps = Plugin.deserializeHighlightSteps( block.getAttribute( 'data-line-numbers' ) ); - if( highlightSteps.length > 1 ) { - - // If the original code block has a fragment-index, - // each clone should follow in an incremental sequence - var fragmentIndex = parseInt( block.getAttribute( 'data-fragment-index' ), 10 ); - - if( typeof fragmentIndex !== 'number' || isNaN( fragmentIndex ) ) { - fragmentIndex = null; - } - - // Generate fragments for all steps except the original block - highlightSteps.slice(1).forEach( function( highlight ) { - - var fragmentBlock = block.cloneNode( true ); - fragmentBlock.setAttribute( 'data-line-numbers', Plugin.serializeHighlightSteps( [ highlight ] ) ); - fragmentBlock.classList.add( 'fragment' ); - block.parentNode.appendChild( fragmentBlock ); - Plugin.highlightLines( fragmentBlock ); - - if( typeof fragmentIndex === 'number' ) { - fragmentBlock.setAttribute( 'data-fragment-index', fragmentIndex ); - fragmentIndex += 1; - } - else { - fragmentBlock.removeAttribute( 'data-fragment-index' ); - } - - // Scroll highlights into view as we step through them - fragmentBlock.addEventListener( 'visible', Plugin.scrollHighlightedLineIntoView.bind( Plugin, fragmentBlock, scrollState ) ); - fragmentBlock.addEventListener( 'hidden', Plugin.scrollHighlightedLineIntoView.bind( Plugin, fragmentBlock.previousSibling, scrollState ) ); - - } ); - - block.removeAttribute( 'data-fragment-index' ) - block.setAttribute( 'data-line-numbers', Plugin.serializeHighlightSteps( [ highlightSteps[0] ] ) ); - - } - - // Scroll the first highlight into view when the slide - // becomes visible. Note supported in IE11 since it lacks - // support for Element.closest. - var slide = typeof block.closest === 'function' ? block.closest( 'section:not(.stack)' ) : null; - if( slide ) { - var scrollFirstHighlightIntoView = function() { - Plugin.scrollHighlightedLineIntoView( block, scrollState, true ); - slide.removeEventListener( 'visible', scrollFirstHighlightIntoView ); - } - slide.addEventListener( 'visible', scrollFirstHighlightIntoView ); - } - - Plugin.highlightLines( block ); - - } - - }, - - /** - * Animates scrolling to the first highlighted line - * in the given code block. - */ - scrollHighlightedLineIntoView: function( block, scrollState, skipAnimation ) { - - cancelAnimationFrame( scrollState.animationFrameID ); - - // Match the scroll position of the currently visible - // code block - if( scrollState.currentBlock ) { - block.scrollTop = scrollState.currentBlock.scrollTop; - } - - // Remember the current code block so that we can match - // its scroll position when showing/hiding fragments - scrollState.currentBlock = block; - - var highlightBounds = this.getHighlightedLineBounds( block ) - var viewportHeight = block.offsetHeight; - - // Subtract padding from the viewport height - var blockStyles = getComputedStyle( block ); - viewportHeight -= parseInt( blockStyles.paddingTop ) + parseInt( blockStyles.paddingBottom ); - - // Scroll position which centers all highlights - var startTop = block.scrollTop; - var targetTop = highlightBounds.top + ( Math.min( highlightBounds.bottom - highlightBounds.top, viewportHeight ) - viewportHeight ) / 2; - - // Account for offsets in position applied to the - // <table> that holds our lines of code - var lineTable = block.querySelector( '.hljs-ln' ); - if( lineTable ) targetTop += lineTable.offsetTop - parseInt( blockStyles.paddingTop ); - - // Make sure the scroll target is within bounds - targetTop = Math.max( Math.min( targetTop, block.scrollHeight - viewportHeight ), 0 ); - - if( skipAnimation === true || startTop === targetTop ) { - block.scrollTop = targetTop; - } - else { - - // Don't attempt to scroll if there is no overflow - if( block.scrollHeight <= viewportHeight ) return; - - var time = 0; - var animate = function() { - time = Math.min( time + 0.02, 1 ); - - // Update our eased scroll position - block.scrollTop = startTop + ( targetTop - startTop ) * Plugin.easeInOutQuart( time ); - - // Keep animating unless we've reached the end - if( time < 1 ) { - scrollState.animationFrameID = requestAnimationFrame( animate ); - } - }; - - animate(); - - } - - }, - - /** - * The easing function used when scrolling. - */ - easeInOutQuart: function( t ) { - - // easeInOutQuart - return t<.5 ? 8*t*t*t*t : 1-8*(--t)*t*t*t; - - }, - - getHighlightedLineBounds: function( block ) { - - var highlightedLines = block.querySelectorAll( '.highlight-line' ); - if( highlightedLines.length === 0 ) { - return { top: 0, bottom: 0 }; - } - else { - var firstHighlight = highlightedLines[0]; - var lastHighlight = highlightedLines[ highlightedLines.length -1 ]; - - return { - top: firstHighlight.offsetTop, - bottom: lastHighlight.offsetTop + lastHighlight.offsetHeight - } - } - - }, - - /** - * Visually emphasize specific lines within a code block. - * This only works on blocks with line numbering turned on. - * - * @param {HTMLElement} block a <code> block - * @param {String} [linesToHighlight] The lines that should be - * highlighted in this format: - * "1" = highlights line 1 - * "2,5" = highlights lines 2 & 5 - * "2,5-7" = highlights lines 2, 5, 6 & 7 - */ - highlightLines: function( block, linesToHighlight ) { - - var highlightSteps = Plugin.deserializeHighlightSteps( linesToHighlight || block.getAttribute( 'data-line-numbers' ) ); - - if( highlightSteps.length ) { - - highlightSteps[0].forEach( function( highlight ) { - - var elementsToHighlight = []; - - // Highlight a range - if( typeof highlight.end === 'number' ) { - elementsToHighlight = [].slice.call( block.querySelectorAll( 'table tr:nth-child(n+'+highlight.start+'):nth-child(-n+'+highlight.end+')' ) ); - } - // Highlight a single line - else if( typeof highlight.start === 'number' ) { - elementsToHighlight = [].slice.call( block.querySelectorAll( 'table tr:nth-child('+highlight.start+')' ) ); - } - - if( elementsToHighlight.length ) { - elementsToHighlight.forEach( function( lineElement ) { - lineElement.classList.add( 'highlight-line' ); - } ); - - block.classList.add( 'has-highlights' ); - } - - } ); - - } - - }, - - /** - * Parses and formats a user-defined string of line - * numbers to highlight. - * - * @example - * Plugin.deserializeHighlightSteps( '1,2|3,5-10' ) - * // [ - * // [ { start: 1 }, { start: 2 } ], - * // [ { start: 3 }, { start: 5, end: 10 } ] - * // ] - */ - deserializeHighlightSteps: function( highlightSteps ) { - - // Remove whitespace - highlightSteps = highlightSteps.replace( /\s/g, '' ); - - // Divide up our line number groups - highlightSteps = highlightSteps.split( Plugin.HIGHLIGHT_STEP_DELIMITER ); - - return highlightSteps.map( function( highlights ) { - - return highlights.split( Plugin.HIGHLIGHT_LINE_DELIMITER ).map( function( highlight ) { - - // Parse valid line numbers - if( /^[\d-]+$/.test( highlight ) ) { - - highlight = highlight.split( Plugin.HIGHLIGHT_LINE_RANGE_DELIMITER ); - - var lineStart = parseInt( highlight[0], 10 ), - lineEnd = parseInt( highlight[1], 10 ); - - if( isNaN( lineEnd ) ) { - return { - start: lineStart - }; - } - else { - return { - start: lineStart, - end: lineEnd - }; - } - - } - // If no line numbers are provided, no code will be highlighted - else { - - return {}; - - } - - } ); - - } ); - - }, - - /** - * Serializes parsed line number data into a string so - * that we can store it in the DOM. - */ - serializeHighlightSteps: function( highlightSteps ) { - - return highlightSteps.map( function( highlights ) { - - return highlights.map( function( highlight ) { - - // Line range - if( typeof highlight.end === 'number' ) { - return highlight.start + Plugin.HIGHLIGHT_LINE_RANGE_DELIMITER + highlight.end; - } - // Single line - else if( typeof highlight.start === 'number' ) { - return highlight.start; - } - // All lines - else { - return ''; - } - - } ).join( Plugin.HIGHLIGHT_LINE_DELIMITER ); - - } ).join( Plugin.HIGHLIGHT_STEP_DELIMITER ); - - } - -} - -// Function to perform a better "data-trim" on code snippets -// Will slice an indentation amount on each line of the snippet (amount based on the line having the lowest indentation length) -function betterTrim(snippetEl) { - // Helper functions - function trimLeft(val) { - // Adapted from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/Trim#Polyfill - return val.replace(/^[\s\uFEFF\xA0]+/g, ''); - } - function trimLineBreaks(input) { - var lines = input.split('\n'); - - // Trim line-breaks from the beginning - for (var i = 0; i < lines.length; i++) { - if (lines[i].trim() === '') { - lines.splice(i--, 1); - } else break; - } - - // Trim line-breaks from the end - for (var i = lines.length-1; i >= 0; i--) { - if (lines[i].trim() === '') { - lines.splice(i, 1); - } else break; - } - - return lines.join('\n'); - } - - // Main function for betterTrim() - return (function(snippetEl) { - var content = trimLineBreaks(snippetEl.innerHTML); - var lines = content.split('\n'); - // Calculate the minimum amount to remove on each line start of the snippet (can be 0) - var pad = lines.reduce(function(acc, line) { - if (line.length > 0 && trimLeft(line).length > 0 && acc > line.length - trimLeft(line).length) { - return line.length - trimLeft(line).length; - } - return acc; - }, Number.POSITIVE_INFINITY); - // Slice each line with this amount - return lines.map(function(line, index) { - return line.slice(pad); - }) - .join('\n'); - })(snippetEl); -} - -export default () => Plugin; |