This commit is contained in:
syuilo 2017-02-09 19:41:17 +09:00
parent e04c03007b
commit 21b72f7854
3 changed files with 209 additions and 2 deletions

View File

@ -11,7 +11,191 @@ module.exports = {
return {
type: 'code',
content: code,
code: code.substr(3, code.length - 6).trim()
code: code.substr(3, code.length - 6).trim(),
codeHtml: genHtml(code.substr(3, code.length - 6).trim())
};
}
};
function escape(text) {
return text
.replace(/>/g, '>')
.replace(/</g, '&lt;');
}
// 文字数が多い順にソートします
// そうしないと、「function」という文字列が与えられたときに「func」が先にマッチしてしまう可能性があるためです
const keywords = [
'true',
'false',
'null',
'nil',
'undefined',
'var',
'const',
'let',
'mut',
'if',
'then',
'else',
'switch',
'case',
'for',
'each',
'in',
'while',
'loop',
'continue',
'break',
'do',
'goto',
'end',
'function',
'func',
'fn',
'return',
'async',
'await',
'require',
'import',
'export',
'new',
'this',
'class',
'constructor'
].sort((a, b) => b.length - a.length);
const symbols = [
'=',
'+',
'-',
'*',
'/',
'%',
'^',
'&',
'|',
'>',
'<',
'~'
];
const elements = [
// comment
code => {
if (code.substr(0, 2) != '//') return null;
const comment = code.match(/^\/\/(.+?)\n/)[0];
return {
html: `<span class="comment">${escape(comment)}</span>`,
next: comment.length
};
},
// string
code => {
if (!/^['"`]/.test(code)) return null;
const begin = code[0];
let str = begin;
let thisIsNotAString = false;
for (i = 1; i < code.length; i++) {
const char = code[i];
if (char == '\\') {
i++;
continue;
} else if (char == begin) {
str += char;
break;
} else if (char == '\n' || i == (code.length - 1)) {
thisIsNotAString = true;
break;
} else {
str += char;
}
}
if (thisIsNotAString) {
return null;
} else {
return {
html: `<span class="string">${escape(str)}</span>`,
next: str.length
};
}
},
// number
(code, i, source) => {
const prev = source[i - 1];
if (prev && /[a-zA-Z]/.test(prev)) return null;
if (!/^[0-9]+/.test(code)) return null;
const match = code.match(/^[0-9]+/)[0];
if (match) {
return {
html: `<span class="number">${match}</span>`,
next: match.length
};
} else {
return null;
}
},
// keyword
code => {
const match = keywords.filter(k => code.substr(0, k.length) == k)[0];
if (match) {
if (/^[a-zA-Z]/.test(code.substr(match.length))) return null;
return {
html: `<span class="keyword ${match}">${match}</span>`,
next: match.length
};
} else {
return null;
}
},
// symbol
code => {
const match = symbols.filter(s => code[0] == s)[0];
if (match) {
return {
html: `<span class="symbol">${match}</span>`,
next: 1
};
} else {
return null;
}
}
];
// specify lang is todo
function genHtml(source, lang) {
let code = source;
let html = '';
function push(token) {
html += token.html;
code = code.substr(token.next);
}
let i = 0;
while (code != '') {
const parsed = elements.some(el => {
const e = el(code, i, source);
if (e) {
push(e);
return true;
}
});
if (!parsed) {
push({
html: escape(code[0]),
next: 1
});
}
i++;
}
return html;
}

View File

@ -107,6 +107,29 @@ a
*
cursor pointer
pre > code
.comment
opacity 0.5
.string
color #e96900
.keyword
color #2973b7
&.true
&.false
&.null
&.nil
&.undefined
color #ae81ff
.symbol
color #42b983
.number
color #ae81ff
mk-locker
display block
position fixed

View File

@ -31,7 +31,7 @@ module.exports = function(tokens, shouldBreak, shouldEscape) {
case 'hashtag': // TODO
return '<a>' + escape(token.content) + '</a>';
case 'code':
return '<pre><code>' + escape(token.code) + '</code></pre>';
return '<pre><code>' + token.codeHtml + '</code></pre>';
}
}).join('');