#2341 - Handle completion messages with textEdit objects

autoload/ale/completion.vim

@@ -39,6 +39,9 @@ let s:LSP_COMPLETION_COLOR_KIND = 16
 let s:LSP_COMPLETION_FILE_KIND = 17
 let s:LSP_COMPLETION_REFERENCE_KIND = 18
 
+let s:LSP_INSERT_TEXT_FORMAT_PLAIN = 1
+let s:LSP_INSERT_TEXT_FORMAT_SNIPPET = 2
+
 let s:lisp_regex = '\v[a-zA-Z_\-][a-zA-Z_\-0-9]*$'
 
 " Regular expressions for checking the characters in the line before where
@@ -350,7 +353,14 @@ function! ale#completion#ParseLSPCompletions(response) abort
             continue
         endif
 
-        let l:word = matchstr(l:item.label, '\v^[^(]+')
+        if get(l:item, 'insertTextFormat') is s:LSP_INSERT_TEXT_FORMAT_PLAIN
+        \&& type(get(l:item, 'textEdit')) is v:t_dict
+            let l:text = l:item.textEdit.newText
+        else
+            let l:text = l:item.label
+        endif
+
+        let l:word = matchstr(l:text, '\v^[^(]+')
 
         if empty(l:word)
             continue

test/completion/test_lsp_completion_parsing.vader

@@ -471,3 +471,34 @@ Execute(Should handle documentation in the markdown format):
   \     ],
   \   },
   \ })
+
+Execute(Should handle completion messages with textEdit objects):
+  AssertEqual
+  \ [
+  \   {'word': 'next_callback', 'menu': 'PlayTimeCallback', 'info': '', 'kind': 'v', 'icase': 1},
+  \ ],
+  \ ale#completion#ParseLSPCompletions({
+  \   'id': 226,
+  \   'jsonrpc': '2.0',
+  \   'result': {
+  \     'isIncomplete': v:false,
+  \     'items': [
+  \       {
+  \         'detail': 'PlayTimeCallback',
+  \         'filterText': 'next_callback',
+  \         'insertText': 'next_callback',
+  \         'insertTextFormat': 1,
+  \         'kind': 6,
+  \         'label': ' next_callback',
+  \         'sortText': '3ee19999next_callback',
+  \         'textEdit': {
+  \           'newText': 'next_callback',
+  \           'range': {
+  \             'end': {'character': 13, 'line': 12},
+  \             'start': {'character': 4, 'line': 12},
+  \           },
+  \         },
+  \       },
+  \     ],
+  \   },
+  \ })