feat: resolve block references in obsidian markdown

Jacky Zhao

2023-09-13 6ecdcb5e24f2783e6fa73de69e848f0f319c4fc4

feat: resolve block references in obsidian markdown

 quartz/plugins/transformers/ofm.ts

@@ -1,6 +1,7 @@
import { PluggableList } from "unified"
import { QuartzTransformerPlugin } from "../types"
import { Root, HTML, BlockContent, DefinitionContent, Code, Paragraph } from "mdast"
import { Element, Literal } from 'hast'
import { Replace, findAndReplace as mdastFindReplace } from "mdast-util-find-and-replace"
import { slug as slugAnchor } from "github-slugger"
import rehypeRaw from "rehype-raw"
@@ -21,6 +22,7 @@
  callouts: boolean
  mermaid: boolean
  parseTags: boolean
  parseBlockReferences: boolean
  enableInHtmlEmbed: boolean
}

@@ -31,6 +33,7 @@
  callouts: true,
  mermaid: true,
  parseTags: true,
  parseBlockReferences: true,
  enableInHtmlEmbed: false,
}

@@ -121,6 +124,7 @@
// (?:[-_\p{L}])+       -> non-capturing group, non-empty string of (Unicode-aware) alpha-numeric characters, hyphens and/or underscores
// (?:\/[-_\p{L}]+)*)   -> non-capturing group, matches an arbitrary number of tag strings separated by "/"
const tagRegex = new RegExp(/(?:^| )#((?:[-_\p{L}\d])+(?:\/[-_\p{L}\d]+)*)/, "gu")
const blockReferenceRegex = new RegExp(/\^([A-Za-z0-9]+)$/, "g")

export const ObsidianFlavoredMarkdown: QuartzTransformerPlugin<Partial<Options> | undefined> = (
  userOpts,
@@ -353,8 +357,7 @@
                node.data = {
                  hProperties: {
                    ...(node.data?.hProperties ?? {}),
                    className: `callout ${collapse ? "is-collapsible" : ""} ${
                      defaultState === "collapsed" ? "is-collapsed" : ""
                    className: `callout ${collapse ? "is-collapsible" : ""} ${defaultState === "collapsed" ? "is-collapsed" : ""
                    }`,
                    "data-callout": calloutType,
                    "data-callout-fold": collapse,
@@ -411,11 +414,38 @@
          }
        })
      }

      return plugins
    },
    htmlPlugins() {
      return [rehypeRaw]
      const plugins = [rehypeRaw]

      if (opts.parseBlockReferences) {
        plugins.push(() => {
          return (tree, file) => {
            file.data.blocks = {}
            const validTagTypes = new Set(["blockquote", "p", "li"])
            visit(tree, "element", (node, _index, _parent) => {
              if (validTagTypes.has(node.tagName)) {
                const last = node.children.at(-1) as Literal
                if (last.value && typeof last.value === 'string') {
                  const matches = last.value.match(blockReferenceRegex)
                  if (matches && matches.length >= 1) {
                    last.value = last.value.slice(0, -matches[0].length)
                    const block = matches[0].slice(1)
                    node.properties = {
                      ...node.properties,
                      id: block
                    }
                    file.data.blocks![block] = node
                  }
                }
              }
            })
          }
        })
      }

      return plugins
    },
    externalResources() {
      const js: JSResource[] = []
@@ -454,3 +484,10 @@
    },
  }
}

declare module "vfile" {
  interface DataMap {
    blocks: Record<string, Element>
  }
}