element-ui/build/md-loader/index.js

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2021-06-07 11:56:04 +08:00
const {
stripScript,
stripTemplate,
genInlineComponentText
} = require('./util');
const md = require('./config');
module.exports = function(source) {
const content = md.render(source);
const startTag = '<!--element-demo:';
const startTagLen = startTag.length;
const endTag = ':element-demo-->';
const endTagLen = endTag.length;
let componenetsString = '';
let id = 0; // demo 的 id
let output = []; // 输出的内容
let start = 0; // 字符串开始位置
let commentStart = content.indexOf(startTag);
let commentEnd = content.indexOf(endTag, commentStart + startTagLen);
while (commentStart !== -1 && commentEnd !== -1) {
output.push(content.slice(start, commentStart));
const commentContent = content.slice(commentStart + startTagLen, commentEnd);
const html = stripTemplate(commentContent);
const script = stripScript(commentContent);
let demoComponentContent = genInlineComponentText(html, script);
const demoComponentName = `element-demo${id}`;
output.push(`<template slot="source"><${demoComponentName} /></template>`);
componenetsString += `${JSON.stringify(demoComponentName)}: ${demoComponentContent},`;
// 重新计算下一次的位置
id++;
start = commentEnd + endTagLen;
commentStart = content.indexOf(startTag, start);
commentEnd = content.indexOf(endTag, commentStart + startTagLen);
}
// 仅允许在 demo 不存在时,才可以在 Markdown 中写 script 标签
// todo: 优化这段逻辑
let pageScript = '';
if (componenetsString) {
pageScript = `<script>
export default {
name: 'component-doc',
components: {
${componenetsString}
}
}
</script>`;
} else if (content.indexOf('<script>') === 0) { // 硬编码,有待改善
start = content.indexOf('</script>') + '</script>'.length;
pageScript = content.slice(0, start);
}
output.push(content.slice(start));
return `
<template>
<section class="content element-doc">
${output.join('')}
</section>
</template>
${pageScript}
`;
};