text content type

crates/gpui/src/platform/mac/window.rs

@@ -84,6 +84,10 @@ type NSDragOperation = NSUInteger;
 const NSDragOperationNone: NSDragOperation = 0;
 #[allow(non_upper_case_globals)]
 const NSDragOperationCopy: NSDragOperation = 1;
+#[allow(non_upper_case_globals)]
+const NSTextAutocorrectionTypeNo: NSInteger = 1;
+#[allow(non_upper_case_globals)]
+const NSTextInlinePredictionTypeNone: NSInteger = 1;
 #[derive(PartialEq)]
 pub enum UserTabbingPreference {
     Never,
@@ -249,6 +253,61 @@ unsafe fn build_classes() {
                     sel!(characterIndexForPoint:),
                     character_index_for_point as extern "C" fn(&Object, Sel, NSPoint) -> u64,
                 );
+
+                // Disable automatic text substitutions and services, which cause
+                // performance issues by constantly running heuristics on macOS 26.
+                decl.add_method(
+                    sel!(isAutomaticTextCompletionEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isAutomaticQuoteSubstitutionEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isAutomaticDashSubstitutionEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isAutomaticLinkDetectionEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isAutomaticDataDetectionEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isAutomaticSpellingCorrectionEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isAutomaticTextReplacementEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isContinuousSpellCheckingEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isGrammarCheckingEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(isSmartInsertDeleteEnabled),
+                    no as extern "C" fn(&Object, Sel) -> BOOL,
+                );
+                decl.add_method(
+                    sel!(autocorrectionType),
+                    autocorrection_type_no as extern "C" fn(&Object, Sel) -> NSInteger,
+                );
+                decl.add_method(
+                    sel!(inlinePredictionType),
+                    inline_prediction_type_none as extern "C" fn(&Object, Sel) -> NSInteger,
+                );
+                decl.add_method(
+                    sel!(textContentType),
+                    return_nil as extern "C" fn(&Object, Sel) -> id,
+                );
             }
             decl.register()
         };
@@ -1600,6 +1659,22 @@ extern "C" fn yes(_: &Object, _: Sel) -> BOOL {
     YES
 }
 
+extern "C" fn no(_: &Object, _: Sel) -> BOOL {
+    NO
+}
+
+extern "C" fn autocorrection_type_no(_: &Object, _: Sel) -> NSInteger {
+    NSTextAutocorrectionTypeNo
+}
+
+extern "C" fn inline_prediction_type_none(_: &Object, _: Sel) -> NSInteger {
+    NSTextInlinePredictionTypeNone
+}
+
+extern "C" fn return_nil(_: &Object, _: Sel) -> id {
+    nil
+}
+
 extern "C" fn dealloc_window(this: &Object, _: Sel) {
     unsafe {
         drop_window_state(this);