From 7757fbe241e90525c0e618bbf0989d9d23aaa555 Mon Sep 17 00:00:00 2001
From: Antonio Scandurra <me@as-cii.com>
Date: Tue, 19 Jul 2022 14:52:02 +0200
Subject: [PATCH] Implement `NSTextInputClient` protocol on window using no-ops

---
 crates/gpui/src/platform/mac/window.rs | 80 +++++++++++++++++++++++++-
 1 file changed, 77 insertions(+), 3 deletions(-)

diff --git a/crates/gpui/src/platform/mac/window.rs b/crates/gpui/src/platform/mac/window.rs
index 23f4dcfa60..8e7510e6aa 100644
--- a/crates/gpui/src/platform/mac/window.rs
+++ b/crates/gpui/src/platform/mac/window.rs
@@ -16,7 +16,7 @@ use cocoa::{
         NSViewHeightSizable, NSViewWidthSizable, NSWindow, NSWindowButton, NSWindowStyleMask,
     },
     base::{id, nil},
-    foundation::{NSAutoreleasePool, NSInteger, NSSize, NSString},
+    foundation::{NSAutoreleasePool, NSInteger, NSPoint, NSRect, NSSize, NSString, NSUInteger},
     quartzcore::AutoresizingMask,
 };
 use core_graphics::display::CGRect;
@@ -42,13 +42,29 @@ use std::{
     time::Duration,
 };
 
-use super::{geometry::RectFExt, renderer::Renderer};
-
 const WINDOW_STATE_IVAR: &'static str = "windowState";
 
 static mut WINDOW_CLASS: *const Class = ptr::null();
 static mut VIEW_CLASS: *const Class = ptr::null();
 
+#[repr(C)]
+#[derive(Copy, Clone)]
+struct NSRange {
+    pub location: NSUInteger,
+    pub length: NSUInteger,
+}
+
+unsafe impl objc::Encode for NSRange {
+    fn encode() -> objc::Encoding {
+        let encoding = format!(
+            "{{NSRange={}{}}}",
+            NSUInteger::encode().as_str(),
+            NSUInteger::encode().as_str()
+        );
+        unsafe { objc::Encoding::from_str(&encoding) }
+    }
+}
+
 #[allow(non_upper_case_globals)]
 const NSViewLayerContentsRedrawDuringViewResize: NSInteger = 2;
 
@@ -164,6 +180,37 @@ unsafe fn build_classes() {
             display_layer as extern "C" fn(&Object, Sel, id),
         );
 
+        decl.add_protocol(Protocol::get("NSTextInputClient").unwrap());
+        decl.add_method(
+            sel!(validAttributesForMarkedText),
+            valid_attributes_for_marked_text as extern "C" fn(&Object, Sel) -> id,
+        );
+        decl.add_method(
+            sel!(hasMarkedText),
+            has_marked_text as extern "C" fn(&Object, Sel) -> BOOL,
+        );
+        decl.add_method(
+            sel!(selectedRange),
+            selected_range as extern "C" fn(&Object, Sel) -> NSRange,
+        );
+        decl.add_method(
+            sel!(firstRectForCharacterRange:actualRange:),
+            first_rect_for_character_range as extern "C" fn(&Object, Sel, NSRange, id) -> NSRect,
+        );
+        decl.add_method(
+            sel!(insertText:replacementRange:),
+            insert_text as extern "C" fn(&Object, Sel, id, NSRange),
+        );
+        decl.add_method(
+            sel!(setMarkedText:selectedRange:replacementRange:),
+            set_marked_text as extern "C" fn(&Object, Sel, id, NSRange, NSRange),
+        );
+        decl.add_method(
+            sel!(attributedSubstringForProposedRange:actualRange:),
+            attributed_substring_for_proposed_range
+                as extern "C" fn(&Object, Sel, NSRange, id) -> id,
+        );
+
         decl.register()
     };
 }
@@ -875,6 +922,33 @@ extern "C" fn display_layer(this: &Object, _: Sel, _: id) {
     }
 }
 
+extern "C" fn valid_attributes_for_marked_text(_: &Object, _: Sel) -> id {
+    unsafe { msg_send![class!(NSArray), array] }
+}
+
+extern "C" fn has_marked_text(_: &Object, _: Sel) -> BOOL {
+    false as BOOL
+}
+
+extern "C" fn selected_range(_: &Object, _: Sel) -> NSRange {
+    NSRange {
+        location: 0,
+        length: 0,
+    }
+}
+
+extern "C" fn first_rect_for_character_range(_: &Object, _: Sel, _: NSRange, _: id) -> NSRect {
+    NSRect::new(NSPoint::new(0., 0.), NSSize::new(20., 20.))
+}
+
+extern "C" fn insert_text(_: &Object, _: Sel, _: id, _: NSRange) {}
+
+extern "C" fn set_marked_text(_: &Object, _: Sel, _: id, _: NSRange, _: NSRange) {}
+
+extern "C" fn attributed_substring_for_proposed_range(_: &Object, _: Sel, _: NSRange, _: id) -> id {
+    unsafe { msg_send![class!(NSAttributedString), alloc] }
+}
+
 async fn synthetic_drag(
     window_state: Weak<RefCell<WindowState>>,
     drag_id: usize,