OneKuma's Blog

# Hello, world!

<div className="note">
  > Some notable things in a block quote!
</div>

import { year } from './data.js'

export const name = 'world'

# Hello {name.toUpperCase()}

The current year is {year} 

::alert{:type="type"}
Your warning
::

---
title: 123123123
tags: [t1, t2, t3]
---

# Hello World

<TagList />

1. list 1
2. list 2

Some text format, **bold**. The title is {frontmatter.title}.

<InfoBox name={"hello"} info={{"key":"value"}} list={[1,2,3]} box={null} />

<div>
  Raw html is ok
</div>

<script setup lang="ts">
import { Markdown } from '@breadio/vue';

const content = `... mdio 语法的文档字符串`;

// 定义了一些 dynamic import 的异步组件
const components = {
  InfoBox: defineAsyncComponent(() => import('~/components/InfoBox.vue')),
  TagList: defineAsyncComponent(() => import('~/components/TagList.vue')),
};
</script>

<template>
  <Markdown :content="kuma" :components="components"></Markdown>
</template>

<script setup lang="ts">
// TagList.vue
// 自动传递了 frontmatter props, 可以直接使用
const props = defineProps<{ frontmatter?: { tags?: string[] } }>();

// 也可以使用 composable 函数获取信息
// import { useWikiContent } from '@breadio/vue'
// const { frontmatter } = useWikiContent();
</script>

<template>
  <p class="tag-list space-x-2">
    <span class="font-bold">标签:</span>
    <span
      v-for="t in props.frontmatter?.tags ?? []"
      :key="t"
      class="rounded py-1 px-2 bg-gray-100"
      >{{ t }}</span
    >
  </p>
</template>

const mdioHandlers: ToHastHandlers = {
  MdioTextElement(state, node: MdioTextElement | MdioFlowElement) {
    // Handle Fragment
    if (!node.name) {
      if (node.children.length > 0) {
        return state.all(node);
      } else {
        return undefined;
      }
    }

    const properties: Record<
      string,
      boolean | number | string | null | undefined | Array<string | number>
    > = {};

    for (const attr of node.attributes) {
      if (attr.type === 'MdioAttribute') {
        if (attr.value === null || attr.value === undefined || typeof attr.value === 'string') {
          properties[attr.name] = attr.value ?? '';
        } else if (attr.value.type === 'MdioAttributeValueExpression') {
          if (/^[A-Z]/.test(node.name)) {
            // For custom components, we directly use raw json data
            properties[attr.name] = attr.value.data?.json;
          } else {
            // For builtin dom, parse JSON string
            try {
              properties[attr.name] = JSON.stringify(attr.value.data?.json);
            } catch (_error) {
              properties[attr.name] = '';
            }
          }
        }
      }
    }

    return {
      type: 'element',
      tagName: node.name,
      properties,
      position: node.position,
      children: state.all(node)
    };
  },
  MdioTextExpression(state, node: MdioTextExpression) {
    if (node.data?.json) {
      const json = node.data.json;
      if (typeof json === 'string' || typeof json === 'number' || typeof json === 'bigint') {
        return {
          type: 'text',
          position: node.position,
          value: '' + json
        };
      } else if (typeof json === 'object') {
        try {
          return {
            type: 'text',
            position: node.position,
            value: JSON.stringify(json)
          };
        } catch (error) {}
      }
    }
    return undefined;
  }
};
  
  const processor = unified()
    .use(remarkParse)
    .use(mdio)
    .use(remarkGfm)
    .use(remarkRehype, {
      handlers: mdioHandlers,
      passThrough: [
        'MdioFlowExpression',
        'MdioFlowElement',
        'MdioTextElement',
        'MdioTextExpression',
      ]
    })

function rewriteVariables(root: MdastRoot, env: Record<string, any>) {
  visit(root, function (node: MdastNodes) {
    if (node.type === 'MdioFlowExpression' || node.type === 'MdioTextExpression') {
      if (node.data?.path) {
        const real = rewrite(node.data.path);
        if (node.type === 'MdioTextExpression') {
          // @ts-expect-error ts2322
          node.type = 'text';
          node.value = real;
        }
      }
    } else if (node.type === 'MdioFlowElement' || node.type === 'MdioTextElement') {
      for (const attr of node.attributes) {
        if (attr.type === 'MdioExpressionAttribute' && attr.data?.path) {
          const real = rewrite(attr.data.path);
          attr.value = real;
        } else if (
          attr.type === 'MdioAttribute' &&
          attr.value &&
          typeof attr.value !== 'string' &&
          attr.value.data?.path
        ) {
          attr.value = rewrite(attr.value.data.path);
        }
      }
    }
  });

  function rewrite(path?: AccessPath) {
    if (!Array.isArray(path) || path.length === 0) return undefined;
    let cur: any = env;
    try {
      for (const p of path ?? []) {
        if (p in cur) {
          cur = cur[p];
        } else {
          cur = undefined;
          break;
        }
      }
    } catch (_error) {
      cur = undefined;
    }
    if (cur) {
      // TODO: handle more cases
      return cur.toString();
    } else {
      return '';
    }
  }
}

<table>
    <thead>
        <tr class="header">
            <th><p>播放地區</p></th>
            <th><p>播放平台</p></th>
            <th><p>播放日期</p></th>
            <th><p>播放時間（<a href="UTC+8" title="wikilink">UTC+8</a>）</p></th>
            <th><p>字幕語言</p></th>
            <th><p>備註</p></th>
        </tr>
    </thead>
    <tbody></tbody>
</table>

table
- thead
  - p  // <---
    - tr
      - th1
      - th2
      - ...
- tbody

import type { VNode } from '@vue/runtime-dom';
import type { Root as HastRoot } from 'hast';

import { visit } from 'unist-util-visit';
import { Fragment, jsx } from 'vue/jsx-runtime';
import { type DefineComponent, computed, defineComponent, h } from 'vue';

import { ParseResult, createParser, toJsxRuntime } from '@breadio/markdown';

export const Markdown = defineComponent({
  name: 'Markdown',
  inheritAttrs: true,
  props: {
    parsed: {
      type: Object,
      required: false
    },
    content: {
      type: String,
      required: false
    },
    components: {
      type: Object,
      required: false
    }
  },
  setup(props, attrs) {
    const parser = createParser();

    const parsed = computed(() => {
      if (props.parsed) {
        return props.parsed as ParseResult<any>;
      } else {
        try {
          const result = parser.parseSync(props.content ?? '');
          return result;
        } catch (error) {
          return undefined;
        }
      }
    });
    const hast = computed(() => {
      if (parsed.value?.hast) {
        const comps = unifyVueHast(parsed.value.hast, {
          frontmatter: parsed.value?.frontmatter
        });
      }
      return parsed.value?.hast;
    });
    const frontmatter = computed(() => parsed.value?.frontmatter);

    return () => {
      const header = attrs.slots.header?.({ frontmatter: frontmatter.value });
      const children = hast.value
        ? (toJsxRuntime(hast.value, {
            components: props.components,
            Fragment,
            // @ts-expect-error ts2322
            jsx,
            // @ts-expect-error ts2322
            jsxs: jsx,
            elementAttributeNameCase: 'html'
          }) as VNode)
        : null;
      const footer = attrs.slots.footer?.({ frontmatter: frontmatter.value });

      return h('div', null, [header, children, footer]);
    };
  }
});

function unifyVueHast(root: HastRoot, env: Record<string, any>) {
  const components = new Set<string>();
  visit(root, function (node) {
    if (node.type === 'element' && /^[A-Z]/.test(node.tagName)) {
      node.properties = { ...node.properties, ...env };
      components.add(node.tagName);
    }
  });
  return components;
}

<script setup lang="ts">
import { Markdown } from '@breadio/vue';

const content = `... mdio 语法的文档字符串`;

// 定义了一些 dynamic import 的异步组件
const components = {
  InfoBox: defineAsyncComponent(() => import('~/components/InfoBox.vue')),
  TagList: defineAsyncComponent(() => import('~/components/TagList.vue')),
};
</script>

<template>
  <Markdown :content="kuma" :components="components"></Markdown>
</template>