refactor: Improve save functionality and prevent unnecessary saving

Author: winverse

packages/markdown-editor/src/components/markdown-editor/toolbar/commands/save.tsx

@@ -2,7 +2,6 @@ import { EditorView, KeyBinding } from '@codemirror/view'
 import { ToolbarCommand } from './type'
 import { CustomEventDetail } from '@/types'
 import { markdownCustomEventName } from '@/index'
-import toast from 'react-hot-toast'
 
 export const saveKeymap: KeyBinding = {
   linux: 'Ctrl-s',
@@ -39,8 +38,17 @@ const save: ToolbarCommand = {
   execute: saveExecute,
 }
 
+const prevDoc: Map<string, string> = new Map()
+
 export function saveExecute(view: EditorView) {
   const doc = view.state.doc.toString()
+
+  const currentUrl = window.location.href
+  if (prevDoc.has(currentUrl) && prevDoc.get(currentUrl) === doc) {
+    return
+  }
+  prevDoc.set(currentUrl, doc)
+
   const event = new CustomEvent<CustomEventDetail['updateItemEvent']>(
     markdownCustomEventName.updateItemEvent,
     {

packages/markdown-editor/src/components/markdown-preview/markdown-preview.tsx

@@ -1,6 +1,6 @@
 import cn from 'clsx'
 import { useConfig } from '@/contexts'
-import { useEffect, useRef, useState, type ReactElement } from 'react'
+import { useEffect, useRef, type ReactElement } from 'react'
 import { MDXRemote } from 'next-mdx-remote'
 import { getComponents } from '@/mdx-components'
 import { useMarkdownEditor } from '@/contexts/markdown-editor'