Add Vim9 Script

.gitmodules

@@ -1581,3 +1581,6 @@
 [submodule "vendor/grammars/zephir-sublime"]
 	path = vendor/grammars/zephir-sublime
 	url = https://github.com/phalcon/zephir-sublime
+[submodule "vendor/grammars/language-vim9"]
+	path = vendor/grammars/language-vim9
+	url = https://github.com/DanBradbury/language-vim9.git

lib/linguist/heuristics.yml

@@ -1056,6 +1056,11 @@ disambiguations:
   - language: JSON
     named_pattern: json
   - language: Yacc
+- extensions: ['.vim']
+  rules:
+  - language: Vim9 script
+    pattern: '^\s*vim9script\s*$'
+  - language: Vim script
 named_patterns:
   cpp:
   - '^\s*#\s*include <(cstdint|string|vector|map|list|array|bitset|queue|stack|forward_list|unordered_map|unordered_set|(i|o|io)stream)>'

lib/linguist/languages.yml

@@ -8277,6 +8277,18 @@ Vim Snippet:
   tm_scope: source.vim-snippet
   ace_mode: text
   language_id: 81265970
+Vim9 Script:
+  type: programming
+  color: "#007030"
+  tm_scope: source.vim
+  aliases:
+  - vim9
+  - vim9script
+  extensions:
+  - ".vim"
+  - ".vim9"
+  ace_mode: text
+  language_id: 534204182
 Visual Basic .NET:
   type: programming
   color: "#945db7"

samples/Vim9 Script/basic.vim

@@ -0,0 +1,57 @@
+vim9script
+
+var myNumber: number = 42
+const PI: number = 3.14159
+final myList: list<string> = ['vim', 'neovim', 'vim9']
+
+def HelloWorld(): void
+  echo "Hello, Vim9!"
+enddef
+
+def Add(a: number, b: number): number
+  return a + b
+enddef
+
+def ProcessList(items: list<string>): dict<number>
+  var result: dict<number> = {}
+  for item in items
+    result[item] = len(item)
+  endfor
+  return result
+enddef
+
+var double = (n: number): number => n * 2
+var squared = (n: number): number => n * n
+
+def CheckValue(val: number): string
+  if val > 0
+    return "positive"
+  elseif val < 0
+    return "negative"
+  else
+    return "zero"
+  endif
+enddef
+
+var name = "Vim9"
+echo $"Welcome to {name}!"
+
+export def PublicFunction(): void
+  echo "This function is exported"
+enddef
+
+def SafeDivide(a: number, b: number): number
+  try
+    return a / b
+  catch
+    echoerr "Division error"
+    return 0
+  endtry
+enddef
+
+var isEnabled: bool = true
+var isDisabled: bool = false
+
+HelloWorld()
+var sum = Add(10, 20)
+echo $"Sum: {sum}"

samples/Vim9 Script/copilot-chat.vim

@@ -0,0 +1,115 @@
+vim9script
+scriptencoding utf-8
+
+import autoload 'copilot_chat/auth.vim' as auth
+import autoload 'copilot_chat/buffer.vim' as _buffer
+import autoload 'copilot_chat/api.vim' as api
+
+export def OpenChat(): void
+  if _buffer.HasActiveChat() && g:copilot_reuse_active_chat == 1
+    _buffer.FocusActiveChat()
+  else
+    _buffer.Create()
+  endif
+  timer_start(10, (_) => auth.VerifySignin())
+enddef
+
+export def StartChat(message: string): void
+  OpenChat()
+  _buffer.AppendMessage(message)
+  api.AsyncRequest([{'content': message, 'role': 'user'}], [])
+enddef
+
+export def ResetChat(): void
+  if g:copilot_chat_active_buffer == -1 || !bufexists(g:copilot_chat_active_buffer)
+    echom 'No active chat window to reset'
+    return
+  endif
+
+  var current_buf = bufnr('%')
+
+  # Switch to the active chat buffer if not already there
+  if current_buf != g:copilot_chat_active_buffer
+    execute 'buffer ' .. g:copilot_chat_active_buffer
+  endif
+
+  deletebufline('%', 1, '$')
+
+  _buffer.WelcomeMessage()
+
+  if current_buf != g:copilot_chat_active_buffer && bufexists(current_buf)
+    execute 'buffer ' .. current_buf
+  endif
+enddef
+
+export def SubmitMessage(): void
+  auth.GetTokens()
+  var messages = []
+  var pattern = ' ━\+$'
+  var all_file_lists = []
+  cursor(1, 1)
+
+  while search(pattern, 'W') > 0
+    var header_line = getline('.')
+    var role = 'user'
+    # Check separator icon to determine message role
+    # Separator with  icon indicates assistant response, otherwise user message
+    if stridx(header_line, ' ') != -1
+      role = 'assistant'
+    endif
+    var start_line: number = line('.') + 1
+    var end_line: number = search(pattern, 'W')
+    if end_line == 0
+      end_line = line('$')
+    else
+      end_line -= 1
+      cursor(line('.') - 1, col('.'))
+    endif
+
+    var lines: list<string> = getline(start_line, end_line)
+    var file_list: list<string> = []
+
+    for i in range(len(lines))
+      var line: string = lines[i]
+      if line =~? '^> \(\w\+\)'
+        var text: string = matchstr(line, '^> \(\w\+\)')
+        text = substitute(text, '^> ', '', '')
+        if has_key(g:copilot_chat_prompts, text)
+          lines[i] = g:copilot_chat_prompts[text]
+        endif
+      elseif line =~? '^#file: '
+        var filename: string = matchstr(line, '^#file: \s*\zs.*\ze$')
+        add(file_list, filename)
+      endif
+    endfor
+    var message: string = join(lines, "\n")
+
+    add(messages, {'content': message, 'role': role})
+    add(all_file_lists, file_list)
+    cursor(line('.'), col('.') + 1)
+  endwhile
+
+  # Limit message history to improve performance
+  # Only send the most recent messages based on configuration
+  var limit: number = g:copilot_chat_message_history_limit
+  if len(messages) > limit && limit > 0
+    var start_idx: number = len(messages) - limit
+    messages = messages[start_idx : ]
+    all_file_lists = all_file_lists[start_idx : ]
+  endif
+
+  # Consolidate file lists from recent messages
+  # O(n) consolidation using dictionary for O(1) duplicate detection (improved from O(n²))
+  var consolidated_files: list<string> = []
+  var seen: dict<any> = {}
+  for files in all_file_lists
+    for file in files
+      if !has_key(seen, file)
+        seen[file] = 1
+        add(consolidated_files, file)
+      endif
+    endfor
+  endfor
+
+  api.AsyncRequest(messages, consolidated_files)
+enddef