From 700036e84c805ab0a59f88b368006a28a97b76d1 Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Tue, 06 Jun 2023 05:14:17 +0000
Subject: [PATCH] callouts

---
 quartz/plugins/transformers/ofm.ts |  143 +++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 142 insertions(+), 1 deletions(-)

diff --git a/quartz/plugins/transformers/ofm.ts b/quartz/plugins/transformers/ofm.ts
index 1dad0b4..2e70cf1 100644
--- a/quartz/plugins/transformers/ofm.ts
+++ b/quartz/plugins/transformers/ofm.ts
@@ -1,18 +1,91 @@
 import { PluggableList } from "unified"
 import { QuartzTransformerPlugin } from "../types"
-import { Root } from 'mdast'
+import { Root, HTML, BlockContent, DefinitionContent } from 'mdast'
 import { findAndReplace } from "mdast-util-find-and-replace"
 import { slugify } from "../../path"
 import rehypeRaw from "rehype-raw"
+import { visit } from "unist-util-visit"
 
 export interface Options {
   highlight: boolean
   wikilinks: boolean
+  callouts: boolean
 }
 
 const defaultOptions: Options = {
   highlight: true,
   wikilinks: true,
+  callouts: true
+}
+
+const icons = {
+  infoIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"></circle><line x1="12" y1="16" x2="12" y2="12"></line><line x1="12" y1="8" x2="12.01" y2="8"></line></svg>`,
+  pencilIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="2" x2="22" y2="6"></line><path d="M7.5 20.5 19 9l-4-4L3.5 16.5 2 22z"></path></svg>`,
+  clipboardListIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="8" y="2" width="8" height="4" rx="1" ry="1"></rect><path d="M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2"></path><path d="M12 11h4"></path><path d="M12 16h4"></path><path d="M8 11h.01"></path><path d="M8 16h.01"></path></svg>`,
+  checkCircleIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 22c5.523 0 10-4.477 10-10S17.523 2 12 2 2 6.477 2 12s4.477 10 10 10z"></path><path d="m9 12 2 2 4-4"></path></svg>`,
+  flameIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M8.5 14.5A2.5 2.5 0 0 0 11 12c0-1.38-.5-2-1-3-1.072-2.143-.224-4.054 2-6 .5 2.5 2 4.9 4 6.5 2 1.6 3 3.5 3 5.5a7 7 0 1 1-14 0c0-1.153.433-2.294 1-3a2.5 2.5 0 0 0 2.5 2.5z"></path></svg>`,
+  checkIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"></polyline></svg>`,
+  helpCircleIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"></circle><path d="M9.09 9a3 3 0 0 1 5.83 1c0 2-3 3-3 3"></path><line x1="12" y1="17" x2="12.01" y2="17"></line></svg>`,
+  alertTriangleIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z"></path><line x1="12" y1="9" x2="12" y2="13"></line><line x1="12" y1="17" x2="12.01" y2="17"></line></svg>`,
+  xIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"></line><line x1="6" y1="6" x2="18" y2="18"></line></svg>`,
+  zapIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polygon points="13 2 3 14 12 14 11 22 21 10 12 10 13 2"></polygon></svg>`,
+  bugIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect width="8" height="14" x="8" y="6" rx="4"></rect><path d="m19 7-3 2"></path><path d="m5 7 3 2"></path><path d="m19 19-3-2"></path><path d="m5 19 3-2"></path><path d="M20 13h-4"></path><path d="M4 13h4"></path><path d="m10 4 1 2"></path><path d="m14 4-1 2"></path></svg>`,
+  listIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="8" y1="6" x2="21" y2="6"></line><line x1="8" y1="12" x2="21" y2="12"></line><line x1="8" y1="18" x2="21" y2="18"></line><line x1="3" y1="6" x2="3.01" y2="6"></line><line x1="3" y1="12" x2="3.01" y2="12"></line><line x1="3" y1="18" x2="3.01" y2="18"></line></svg>`,
+  quoteIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M3 21c3 0 7-1 7-8V5c0-1.25-.756-2.017-2-2H4c-1.25 0-2 .75-2 1.972V11c0 1.25.75 2 2 2 1 0 1 0 1 1v1c0 1-1 2-2 2s-1 .008-1 1.031V20c0 1 0 1 1 1z"></path><path d="M15 21c3 0 7-1 7-8V5c0-1.25-.757-2.017-2-2h-4c-1.25 0-2 .75-2 1.972V11c0 1.25.75 2 2 2h.75c0 2.25.25 4-2.75 4v3c0 1 0 1 1 1z"></path></svg>`,
+}
+
+function canonicalizeCallout(calloutName: string): keyof typeof callouts {
+  let callout = calloutName.toLowerCase() as keyof typeof calloutMapping
+
+  const calloutMapping: Record<string, keyof typeof callouts> = {
+    note: "note",
+    abstract: "abstract",
+    info: "info",
+    todo: "todo",
+    tip: "tip",
+    hint: "tip",
+    important: "tip",
+    success: "success",
+    check: "success",
+    done: "success",
+    question: "question",
+    help: "question",
+    faq: "question",
+    warning: "warning",
+    attention: "warning",
+    caution: "warning",
+    failure: "failure",
+    missing: "failure",
+    fail: "failure",
+    danger: "danger",
+    error: "danger",
+    bug: "bug",
+    example: "example",
+    quote: "quote",
+    cite: "quote"
+  }
+
+  return calloutMapping[callout]
+}
+
+const callouts = {
+  note: icons.pencilIcon,
+  abstract: icons.clipboardListIcon,
+  info: icons.infoIcon,
+  todo: icons.checkCircleIcon,
+  tip: icons.flameIcon,
+  success: icons.checkIcon,
+  question: icons.helpCircleIcon,
+  warning: icons.alertTriangleIcon,
+  failure: icons.xIcon,
+  danger: icons.zapIcon,
+  bug: icons.bugIcon,
+  example: icons.listIcon,
+  quote: icons.quoteIcon,
+}
+
+const capitalize = (s: string): string => {
+  return s.substring(0, 1).toUpperCase() + s.substring(1);
 }
 
 export class ObsidianFlavoredMarkdown extends QuartzTransformerPlugin {
@@ -76,6 +149,74 @@
       })
     }
 
+    if (this.opts.callouts) {
+      plugins.push(() => {
+        // from https://github.com/escwxyz/remark-obsidian-callout/blob/main/src/index.ts
+        const calloutRegex = new RegExp(/^\[\!(\w+)\]([+-]?)/)
+        return (tree: Root, _file) => {
+          visit(tree, "blockquote", (node) => {
+            if (node.children.length === 0) {
+              return
+            }
+
+            // find first line
+            const firstChild = node.children[0]
+            if (firstChild.type !== "paragraph" || firstChild.children[0]?.type !== "text") {
+              return
+            }
+
+            const text = firstChild.children[0].value
+            const [firstLine, ...remainingLines] = text.split("\n")
+            const remainingText = remainingLines.join("\n")
+
+            const match = firstLine.match(calloutRegex)
+            if (match && match.input) {
+              const [calloutDirective, typeString, collapseChar] = match
+              const calloutType = typeString.toLowerCase() as keyof typeof callouts
+              const collapse = collapseChar === "+" || collapseChar === "-"
+              const defaultState = collapseChar === "-" ? "collapsed" : "expanded"
+              const title = match.input.slice(calloutDirective.length).trim() || capitalize(calloutType)
+
+              const titleNode: HTML = {
+                type: "html",
+                value: `<div 
+                  class="callout-title"
+                >
+                  <div class="callout-icon">${callouts[canonicalizeCallout(calloutType)]}</div>
+                  <div class="callout-title-inner">${title}</div>
+                </div>`
+              }
+
+              const blockquoteContent: (BlockContent | DefinitionContent)[] = [titleNode]
+              if (remainingText.length > 0) {
+                blockquoteContent.push({
+                  type: 'paragraph',
+                  children: [{
+                    type: 'text',
+                    value: remainingText,
+                  }]
+
+                })
+              }
+
+              // replace first line of blockquote with title and rest of the paragraph text
+              node.children.splice(0, 1, ...blockquoteContent)
+
+              // add properties to base blockquote
+              node.data = {
+                hProperties: {
+                  ...(node.data?.hProperties ?? {}),
+                  className: `callout ${collapse ? "is-collapsible" : ""} ${defaultState === "collapsed" ? "is-collapsed" : ""}`,
+                  "data-callout": calloutType,
+                  "data-callout-fold": collapse,
+                }
+              }
+            }
+          })
+        }
+      })
+    }
+
     return plugins
   }
 

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