From b9b1ec22084cfe82ced7e34412dab0351828fc53 Mon Sep 17 00:00:00 2001
From: Michael Davis
Date: Sat, 22 Oct 2022 09:52:25 -0500
Subject: Apply snippets as transactions

---
 helix-term/src/ui/completion.rs | 46 ++++++++++++++++++++++++++++++++---------
 1 file changed, 36 insertions(+), 10 deletions(-)

(limited to 'helix-term/src/ui')

diff --git a/helix-term/src/ui/completion.rs b/helix-term/src/ui/completion.rs
index a24da20a..6897305d 100644
--- a/helix-term/src/ui/completion.rs
+++ b/helix-term/src/ui/completion.rs
@@ -119,7 +119,9 @@ impl Completion {
                 start_offset: usize,
                 trigger_offset: usize,
             ) -> Transaction {
-                let transaction = if let Some(edit) = &item.text_edit {
+                use helix_lsp::snippet;
+
+                if let Some(edit) = &item.text_edit {
                     let edit = match edit {
                         lsp::CompletionTextEdit::Edit(edit) => edit.clone(),
                         lsp::CompletionTextEdit::InsertAndReplace(item) => {
@@ -128,12 +130,38 @@ impl Completion {
                         }
                     };
 
-                    util::generate_transaction_from_completion_edit(
-                        doc.text(),
-                        doc.selection(view_id),
-                        edit,
-                        offset_encoding, // TODO: should probably transcode in Client
-                    )
+                    if matches!(item.kind, Some(lsp::CompletionItemKind::SNIPPET))
+                        || matches!(
+                            item.insert_text_format,
+                            Some(lsp::InsertTextFormat::SNIPPET)
+                        )
+                    {
+                        match snippet::parse(&edit.new_text) {
+                            Ok(snippet) => snippet::into_transaction(
+                                snippet,
+                                doc.text(),
+                                doc.selection(view_id),
+                                &edit,
+                                doc.line_ending.as_str(),
+                                offset_encoding,
+                            ),
+                            Err(err) => {
+                                log::error!(
+                                    "Failed to parse snippet: {:?}, remaining output: {}",
+                                    &edit.new_text,
+                                    err
+                                );
+                                Transaction::new(doc.text())
+                            }
+                        }
+                    } else {
+                        util::generate_transaction_from_completion_edit(
+                            doc.text(),
+                            doc.selection(view_id),
+                            edit,
+                            offset_encoding, // TODO: should probably transcode in Client
+                        )
+                    }
                 } else {
                     let text = item.insert_text.as_ref().unwrap_or(&item.label);
                     // Some LSPs just give you an insertText with no offset ¯\_(ツ)_/¯
@@ -157,9 +185,7 @@ impl Completion {
 
                         (cursor, cursor, Some(text.into()))
                     })
-                };
-
-                transaction
+                }
             }
 
             fn completion_changes(transaction: &Transaction, trigger_offset: usize) -> Vec<Change> {
-- 
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