1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | 8x 144x 3x 30x 30x 3x 177x 84x 225x 225x 144x 81x 81x 81x 84x 3x 3x 144x 144x 144x 21x 21x 51x 51x 51x 21x 21x 30x 21x 21x 18x 3x 9x 21x 144x 3x 3x 14x 414x 8x 14x 14x 14x 14x 1x 14x 14x 14x 14x 14x | import React from 'react'; import createElement from './create-element'; const newLineRegex = /\n/g; function getNewLines(str) { return str.match(newLineRegex); } function getLineNumbers({ lines, startingLineNumber, style }) { return lines.map((_, i) => { const number = i + startingLineNumber; return ( <span key={`line-${i}`} className='react-syntax-highlighter-line-number' style={typeof style === 'function' ? style(number) : style} > {`${number}\n`} </span> ); }); } function LineNumbers({ codeString, containerStyle = {float: 'left', paddingRight: '10px'}, numberStyle = {}, startingLineNumber }) { return ( <code style={containerStyle}> {getLineNumbers({ lines: codeString.replace(/\n$/, '').split('\n'), style: numberStyle, startingLineNumber })} </code> ); } function createLineElement({ children, lineNumber, lineStyle, className = [] }) { return { type: 'element', tagName: 'span', properties: { className, style: ( typeof lineStyle === 'function' ? lineStyle(lineNumber) : lineStyle ) }, children } } function flattenCodeTree(tree, className = [], newTree = []) { for (let i = 0; i < tree.length; i++) { const node = tree[i]; if (node.type === 'text') { newTree.push(createLineElement({ children: [node], className })); } else Eif (node.children) { const classNames = className.concat(node.properties.className); newTree = newTree.concat(flattenCodeTree(node.children, classNames)); } } return newTree; } function wrapLinesInSpan(codeTree, lineStyle) { const tree = flattenCodeTree(codeTree.value); const { newTree, lastLineBreakIndex } = tree.reduce(({ newTree, lastLineBreakIndex }, node, index) => { const value = node.children[0].value; const newLines = getNewLines(value); if (newLines) { const splitValue = value.split('\n'); splitValue.forEach((text, i) => { const lineNumber = newTree.length + 1; const newChild = { type: 'text', value: `${text}\n`}; if (i === 0) { const children = tree.slice( lastLineBreakIndex + 1, index ).concat(newChild); newTree.push(createLineElement({ children, lineNumber, lineStyle })); } else if (i === splitValue.length - 1) { const stringChild = ( tree[index + 1] && tree[index + 1].children && tree[index + 1].children[0] ); if (stringChild) { stringChild.value = `${text}${stringChild.value}`; } else { newTree.push(createLineElement({ children: [newChild], lineNumber, lineStyle })); } } else { newTree.push(createLineElement({ children: [newChild], lineNumber, lineStyle })); } }); lastLineBreakIndex = index; } return { newTree, lastLineBreakIndex }; }, { newTree: [], lastLineBreakIndex: -1 }); Iif (lastLineBreakIndex !== tree.length - 1) { const children = tree.slice(lastLineBreakIndex + 1, tree.length); if (children && children.length) { newTree.push(createLineElement({ children, lineNumber: newTree.length + 1, lineStyle })); } } return newTree; } function defaultRenderer({ rows, stylesheet, useInlineStyles }) { return ( rows.map((node, i) => createElement({ node, stylesheet, useInlineStyles, key: `code-segement${i}` })) ); } export default function (lowlight, defaultStyle) { return function SyntaxHighlighter({ language, children, style = defaultStyle, customStyle = {}, codeTagProps = {}, useInlineStyles = true, showLineNumbers = false, startingLineNumber = 1, lineNumberContainerStyle, lineNumberStyle, wrapLines, lineStyle = {}, renderer, PreTag='pre', CodeTag='code', ...rest }) { /* * some custom renderers rely on individual row elements so we need to turn wrapLines on * if renderer is provided and wrapLines is undefined */ wrapLines = renderer && wrapLines === undefined ? true : wrapLines; renderer = renderer || defaultRenderer; const codeTree = ( language ? lowlight.highlight(language, children) : lowlight.highlightAuto(children) ); if (codeTree.language === null) { codeTree.value = [{ type: 'text', value: children }]; } const defaultPreStyle = style.hljs || { backgroundColor: '#fff' }; const preProps = ( useInlineStyles ? Object.assign({}, rest, { style: Object.assign({}, defaultPreStyle, customStyle) }) : Object.assign({}, rest, { className: 'hljs'}) ); const tree = wrapLines ? wrapLinesInSpan(codeTree, lineStyle) : codeTree.value; const lineNumbers = ( showLineNumbers ? <LineNumbers containerStyle={lineNumberContainerStyle} numberStyle={lineNumberStyle} startingLineNumber={startingLineNumber} codeString={children} /> : null ); return ( <PreTag {...preProps}> {lineNumbers} <CodeTag {...codeTagProps}> {renderer({ rows: tree, stylesheet: style, useInlineStyles })} </CodeTag> </PreTag> ); } } |