Jacky Zhao
2024-01-24 fa6c02d3213dfd4e6da8e78bd3a2e7004555fd01
quartz/plugins/transformers/ofm.ts
@@ -4,7 +4,7 @@
import { ReplaceFunction, findAndReplace as mdastFindReplace } from "mdast-util-find-and-replace"
import { slug as slugAnchor } from "github-slugger"
import rehypeRaw from "rehype-raw"
import { visit } from "unist-util-visit"
import { SKIP, visit } from "unist-util-visit"
import path from "path"
import { JSResource } from "../../util/resources"
// @ts-ignore
@@ -23,8 +23,11 @@
  callouts: boolean
  mermaid: boolean
  parseTags: boolean
  parseArrows: boolean
  parseBlockReferences: boolean
  enableInHtmlEmbed: boolean
  enableYouTubeEmbed: boolean
  enableVideoEmbed: boolean
}
const defaultOptions: Options = {
@@ -34,8 +37,11 @@
  callouts: true,
  mermaid: true,
  parseTags: true,
  parseArrows: true,
  parseBlockReferences: true,
  enableInHtmlEmbed: false,
  enableYouTubeEmbed: true,
  enableVideoEmbed: true,
}
const icons = {
@@ -107,6 +113,8 @@
export const externalLinkRegex = /^https?:\/\//i
export const arrowRegex = new RegExp(/-{1,2}>/, "g")
// !?               -> optional embedding
// \[\[             -> open brace
// ([^\[\]\|\#]+)   -> one or more non-special characters ([,],|, or #) (name)
@@ -117,7 +125,7 @@
  "g",
)
const highlightRegex = new RegExp(/==([^=]+)==/, "g")
const commentRegex = new RegExp(/%%(.+)%%/, "g")
const commentRegex = new RegExp(/%%[\s\S]*?%%/, "g")
// from https://github.com/escwxyz/remark-obsidian-callout/blob/main/src/index.ts
const calloutRegex = new RegExp(/^\[\!(\w+)\]([+-]?)/)
const calloutLineRegex = new RegExp(/^> *\[\!\w+\][+-]?.*$/, "gm")
@@ -126,7 +134,9 @@
// (?:[-_\p{L}\d\p{Z}])+       -> non-capturing group, non-empty string of (Unicode-aware) alpha-numeric characters and symbols, hyphens and/or underscores
// (?:\/[-_\p{L}\d\p{Z}]+)*)   -> non-capturing group, matches an arbitrary number of tag strings separated by "/"
const tagRegex = new RegExp(/(?:^| )#((?:[-_\p{L}\p{Emoji}\d])+(?:\/[-_\p{L}\p{Emoji}\d]+)*)/, "gu")
const blockReferenceRegex = new RegExp(/\^([A-Za-z0-9]+)$/, "g")
const blockReferenceRegex = new RegExp(/\^([-_A-Za-z0-9]+)$/, "g")
const ytLinkRegex = /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*).*/
const videoExtensionRegex = new RegExp(/\.(mp4|webm|ogg|avi|mov|flv|wmv|mkv|mpg|mpeg|3gp|m4v)$/)
export const ObsidianFlavoredMarkdown: QuartzTransformerPlugin<Partial<Options> | undefined> = (
  userOpts,
@@ -141,13 +151,22 @@
  return {
    name: "ObsidianFlavoredMarkdown",
    textTransform(_ctx, src) {
      // do comments at text level
      if (opts.comments) {
        if (src instanceof Buffer) {
          src = src.toString()
        }
        src = src.replace(commentRegex, "")
      }
      // pre-transform blockquotes
      if (opts.callouts) {
        if (src instanceof Buffer) {
          src = src.toString()
        }
        src = src.replaceAll(calloutLineRegex, (value) => {
        src = src.replace(calloutLineRegex, (value) => {
          // force newline after title of callout
          return value + "\n> "
        })
@@ -159,7 +178,7 @@
          src = src.toString()
        }
        src = src.replaceAll(wikilinkRegex, (value, ...capture) => {
        src = src.replace(wikilinkRegex, (value, ...capture) => {
          const [rawFp, rawHeader, rawAlias]: (string | undefined)[] = capture
          const fp = rawFp ?? ""
@@ -201,7 +220,7 @@
                if (value.startsWith("!")) {
                  const ext: string = path.extname(fp).toLowerCase()
                  const url = slugifyFilePath(fp as FilePath)
                  if ([".png", ".jpg", ".jpeg", ".gif", ".bmp", ".svg"].includes(ext)) {
                  if ([".png", ".jpg", ".jpeg", ".gif", ".bmp", ".svg", ".webp"].includes(ext)) {
                    const dims = alias ?? ""
                    let [width, height] = dims.split("x", 2)
                    width ||= "auto"
@@ -233,7 +252,7 @@
                      type: "html",
                      value: `<iframe src="${url}"></iframe>`,
                    }
                  } else if (ext === "") {
                  } else {
                    const block = anchor
                    return {
                      type: "html",
@@ -276,13 +295,13 @@
            ])
          }
          if (opts.comments) {
          if (opts.parseArrows) {
            replacements.push([
              commentRegex,
              arrowRegex,
              (_value: string, ..._capture: string[]) => {
                return {
                  type: "text",
                  value: "",
                  type: "html",
                  value: `<span>&rarr;</span>`,
                }
              },
            ])
@@ -327,7 +346,7 @@
                if (typeof replace === "string") {
                  node.value = node.value.replace(regex, replace)
                } else {
                  node.value = node.value.replaceAll(regex, (substring: string, ...args) => {
                  node.value = node.value.replace(regex, (substring: string, ...args) => {
                    const replaceValue = replace(substring, ...args)
                    if (typeof replaceValue === "string") {
                      return replaceValue
@@ -343,11 +362,28 @@
              }
            })
          }
          mdastFindReplace(tree, replacements)
        }
      })
      if (opts.enableVideoEmbed) {
        plugins.push(() => {
          return (tree: Root, _file) => {
            visit(tree, "image", (node, index, parent) => {
              if (parent && index != undefined && videoExtensionRegex.test(node.url)) {
                const newNode: Html = {
                  type: "html",
                  value: `<video controls src="${node.url}"></video>`,
                }
                parent.children.splice(index, 1, newNode)
                return SKIP
              }
            })
          }
        })
      }
      if (opts.callouts) {
        plugins.push(() => {
          return (tree: Root, _file) => {
@@ -363,7 +399,7 @@
              }
              const text = firstChild.children[0].value
              const restChildren = firstChild.children.slice(1)
              const restOfTitle = firstChild.children.slice(1)
              const [firstLine, ...remainingLines] = text.split("\n")
              const remainingText = remainingLines.join("\n")
@@ -379,7 +415,10 @@
                  match.input.slice(calloutDirective.length).trim() || capitalize(calloutType)
                const titleNode: Paragraph = {
                  type: "paragraph",
                  children: [{ type: "text", value: titleContent + " " }, ...restChildren],
                  children:
                    restOfTitle.length === 0
                      ? [{ type: "text", value: titleContent + " " }]
                      : restOfTitle,
                }
                const title = mdastToHtml(titleNode)
@@ -505,6 +544,30 @@
        })
      }
      if (opts.enableYouTubeEmbed) {
        plugins.push(() => {
          return (tree: HtmlRoot) => {
            visit(tree, "element", (node) => {
              if (node.tagName === "img" && typeof node.properties.src === "string") {
                const match = node.properties.src.match(ytLinkRegex)
                const videoId = match && match[2].length == 11 ? match[2] : null
                if (videoId) {
                  node.tagName = "iframe"
                  node.properties = {
                    class: "external-embed",
                    allow: "fullscreen",
                    frameborder: 0,
                    width: "600px",
                    height: "350px",
                    src: `https://www.youtube.com/embed/${videoId}`,
                  }
                }
              }
            })
          }
        })
      }
      return plugins
    },
    externalResources() {