Fix single line edit prediction detection (#23456)

#23411 introduced an "Accept" callout for single line edits, but the
logic to detect them was incorrect causing it to trigger for multiline
insertions, this PR fixes that.

Release Notes:

- N/A

crates/editor/src/element.rs

@@ -1592,7 +1592,6 @@ impl EditorElement {
         &self,
         display_row: DisplayRow,
         display_snapshot: &DisplaySnapshot,
-        buffer_snapshot: &MultiBufferSnapshot,
         line_layout: &LineWithInvisibles,
         crease_trailer: Option<&CreaseTrailerLayout>,
         em_width: Pixels,
@@ -1628,11 +1627,9 @@ impl EditorElement {
 
             if let Some(inline_completion) = editor.active_inline_completion.as_ref() {
                 match &inline_completion.completion {
-                    InlineCompletion::Edit(edits)
-                        if single_line_edit(&edits, buffer_snapshot).is_some() =>
-                    {
-                        padding += INLINE_ACCEPT_SUGGESTION_EM_WIDTHS
-                    }
+                    InlineCompletion::Edit {
+                        single_line: true, ..
+                    } => padding += INLINE_ACCEPT_SUGGESTION_EM_WIDTHS,
                     _ => {}
                 }
             }
@@ -3389,7 +3386,7 @@ impl EditorElement {
                     Some(element)
                 }
             }
-            InlineCompletion::Edit(edits) => {
+            InlineCompletion::Edit { edits, single_line } => {
                 if self.editor.read(cx).has_active_completions_menu() {
                     return None;
                 }
@@ -3413,7 +3410,7 @@ impl EditorElement {
                     return None;
                 }
 
-                if let Some(range) = single_line_edit(&edits, &editor_snapshot.buffer_snapshot) {
+                if let (true, Some((range, _))) = (single_line, edits.first()) {
                     let mut element = inline_completion_tab_indicator("Accept", None, cx);
 
                     let target_display_point = range.end.to_display_point(editor_snapshot);
@@ -5250,22 +5247,6 @@ fn inline_completion_tab_indicator(
         .into_any()
 }
 
-fn single_line_edit<'a>(
-    edits: &'a [(Range<Anchor>, String)],
-    snapshot: &MultiBufferSnapshot,
-) -> Option<&'a Range<Anchor>> {
-    let [(range, _)] = edits else {
-        return None;
-    };
-
-    let point_range = range.to_point(&snapshot);
-    if point_range.start.row == point_range.end.row {
-        Some(range)
-    } else {
-        None
-    }
-}
-
 fn all_edits_insertions_or_deletions(
     edits: &Vec<(Range<Anchor>, String)>,
     snapshot: &MultiBufferSnapshot,
@@ -6550,7 +6531,6 @@ impl Element for EditorElement {
                             inline_blame = self.layout_inline_blame(
                                 display_row,
                                 &snapshot.display_snapshot,
-                                &snapshot.buffer_snapshot,
                                 line_layout,
                                 crease_trailer_layout,
                                 em_width,