try to convert workspaceEdit.documentChanges to plain changes

We do not support workspaceEdit.documentChanges but some LSP servers
do not respect our capabilities and send them anyways.
Try to optimistically convert simple documentChanges to plain changes.
We only support simple TextDocumentEdit[].

1 files changed, 12 insertions, 1 deletions

diff --git a/init.lua b/init.lua
index 33cb547..7d82bcb 100644
--- a/init.lua
+++ b/init.lua
@@ -499,7 +499,18 @@ end
 -- apply a WorkspaceEdit received from the language server
 local function vis_apply_workspaceEdit(_, _, workspaceEdit)
   local file_edits = workspaceEdit.changes
-  assert(file_edits)
+  assert(file_edits or workspaceEdit.documentChanges)
+
+  -- try to convert NOT SUPPORTED TextDocumentEdit[]
+  -- We do not announce suppport for versioned DocumentChanges in our
+  -- client capabilities, but some LSP servers ignore our capabilities
+  -- sending them anyway.
+  if not file_edits then
+    file_edits = {}
+    for _, edit in ipairs(workspaceEdit.documentChanges) do
+      file_edits[edit.textDocument.uri] = edit.edits
+    end
+  end
 
   -- generate change summary
   local summary = '--- workspace edit summary ---\n'