Remove custom AST pretty printer

This won’t be necessary as the alpha now always pretty prints an AST

packages/tailwindcss-language-server/src/util/v4/design-system.ts

@@ -60,64 +60,13 @@ export async function loadDesignSystem(
       //   return str
       // })
 
-      // TODO: Formatting with prettier would be preferable, but it's too slow
-      // Need to figure out why and if we can make it faster
       let roots = css.map((str) => {
         if (str === null) return postcss.root()
 
-        let result = ''
-        for (let i = 0; i < str.length; ++i) {
-          if (str[i] === '\\') {
-            result += str[i] + str[i + 1]
-            i += 1
-          } else if (str[i] === '"') {
-            let end = str.indexOf('"', i + 1)
-            result += str.slice(i, end + 1)
-            i = end
-          } else if (str[i] === "'") {
-            let end = str.indexOf("'", i + 1)
-            result += str.slice(i, end + 1)
-            i = end
-          } else if (str[i] === '{') {
-            result += ' {\n'
-          } else if (str[i] === '}') {
-            result += '}\n'
-          } else if (str[i] === ';') {
-            result += ';\n'
-          } else if (str[i] === ':') {
-            let prev = str.charCodeAt(i - 1)
-            if (
-              (prev >= 65 && prev <= 90) ||
-              (prev >= 97 && prev <= 122) ||
-              (prev >= 48 && prev <= 57)
-            ) {
-              result += ': '
-            } else {
-              result += ':'
-            }
-          } else {
-            result += str[i]
-          }
-        }
-
-        let lines = result.split('\n')
-
-        let depth = 0
-
-        for (let i = 0; i < lines.length; ++i) {
-          let line = lines[i]
-          if (line.includes('}')) depth--
-          let indent = '    '.repeat(Math.max(0, depth))
-          lines[i] = indent + line
-          if (line.includes('{')) depth++
-        }
-
-        let pretty = lines.join('\n').trim()
-
         try {
-          return postcss.parse(pretty)
-        } catch {
           return postcss.parse(str)
+        } catch {
+          return null
         }
       })
 

packages/tailwindcss-language-service/src/util/jit.ts

@@ -47,10 +47,13 @@ export async function stringifyRoot(state: State, root: Root, uri?: string): Pro
     css = addPixelEquivalentsToCss(css, settings.tailwindCSS.rootFontSize)
   }
 
+  let identSize = state.v4 ? 2 : 4
+  let identPattern = state.v4 ? /^(?:  )+/gm : /^(?:    )+/gm
+
   return css
     .replace(/([^;{}\s])(\n\s*})/g, (_match, before, after) => `${before};${after}`)
-    .replace(/^(?:    )+/gm, (indent: string) =>
-      ' '.repeat((indent.length / 4) * settings.editor.tabSize)
+    .replace(identPattern, (indent: string) =>
+      ' '.repeat((indent.length / identSize) * settings.editor.tabSize)
     )
 }