From a9b5155f16d899afae9812de1c03b3d3a34b7d6a Mon Sep 17 00:00:00 2001
From: DIYgod <i@diygod.me>
Date: Thu, 15 Jun 2023 21:35:12 +0100
Subject: [PATCH] Revert "feat: remove remark-pangu"

This reverts commit edff400905249b08a2c2d2fd2264a47b4bebdcda.
---
 src/markdown/index.ts        |  2 ++
 src/markdown/remark-pangu.ts | 60 ++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 src/markdown/remark-pangu.ts

diff --git a/src/markdown/index.ts b/src/markdown/index.ts
index 6738339b..83fd517b 100644
--- a/src/markdown/index.ts
+++ b/src/markdown/index.ts
@@ -46,6 +46,7 @@ import { rehypeWrapCode } from "./rehype-wrap-code"
 import { rehypeExternalLink } from "./rehyper-external-link"
 import { remarkCallout } from "./remark-callout"
 import { remarkMermaid } from "./remark-mermaid"
+import { remarkPangu } from "./remark-pangu"
 import { remarkYoutube } from "./remark-youtube"
 import sanitizeScheme from "./sanitize-schema"
 
@@ -123,6 +124,7 @@ export const renderPageContent = (
       .use(remarkMath, {
         singleDollarTextMath: false,
       })
+      .use(remarkPangu)
       .use(() => (tree) => {
         env.toc = toc(tree, { tight: true, ordered: true })
       })
diff --git a/src/markdown/remark-pangu.ts b/src/markdown/remark-pangu.ts
new file mode 100644
index 00000000..a245199d
--- /dev/null
+++ b/src/markdown/remark-pangu.ts
@@ -0,0 +1,60 @@
+import pangu from "pangu"
+import type { Root } from "remark-gfm"
+import type { Plugin } from "unified"
+import { visit } from "unist-util-visit"
+
+interface Options {
+  text?: boolean
+  inlineCode?: boolean
+  link?: boolean
+  image?: boolean
+  definition?: boolean
+  imageReference?: boolean
+}
+
+const defaultOptions: Options = {
+  text: true,
+  inlineCode: false,
+  link: true,
+  image: true,
+  definition: true,
+  imageReference: true,
+}
+
+function format(value: string) {
+  if (!value) return value
+  return pangu.spacing(value)
+}
+
+export const remarkPangu: Plugin<Array<Options>, Root> =
+  (options = {}) =>
+  (tree, _) => {
+    const settings = Object.assign({}, defaultOptions, options)
+    const subset = (Object.keys(settings) as Array<keyof Options>).filter(
+      (k) => settings[k],
+    ) as string[]
+
+    visit(tree, (node) => {
+      if (subset.includes(node.type)) {
+        if (node.type === "text" || node.type === "inlineCode") {
+          node.value = format(node.value)
+        }
+
+        if (
+          (node.type === "link" ||
+            node.type === "image" ||
+            node.type === "definition") &&
+          node.title
+        ) {
+          node.title = format(node.title)
+        }
+
+        if (
+          (node.type === "image" || node.type === "imageReference") &&
+          node.alt
+        ) {
+          node.alt = format(node.alt)
+        }
+      }
+    })
+  }