fix: keep macOS cursor visible after keyboard input

src/platform/macos/input.cpp

@@ -327,6 +327,8 @@ const KeyCodeMap kKeyCodesMap[] = {
     }
   }
 
+  void reveal_cursor(input_t &input);
+
   void keyboard_update(input_t &input, uint16_t modcode, bool release, uint8_t flags) {
     auto key = keysym(modcode);
 
@@ -370,6 +372,7 @@ const KeyCodeMap kKeyCodesMap[] = {
     CGEventSetFlags(event, macos_input->kb_flags);
     CGEventPost(kCGSessionEventTap, event);
     CFRelease(event);
+    reveal_cursor(input);
   }
 
   void unicode(input_t &input, char *utf8, int size) {
@@ -402,6 +405,32 @@ const KeyCodeMap kKeyCodesMap[] = {
     };
   }
 
+  /**
+   * @brief Nudge macOS into making the cursor visible after keyboard input.
+   *
+   * @param input Platform input context.
+   */
+  void reveal_cursor(input_t &input) {
+    auto macos_input = static_cast<macos_input_t *>(input.get());
+    auto current = get_mouse_loc(input);
+    auto location = CGPoint {current.x, current.y};
+
+    CGAssociateMouseAndMouseCursorPosition(true);
+    CGDisplayShowCursor(macos_input->display);
+
+    auto event = CGEventCreateMouseEvent(macos_input->source, kCGEventMouseMoved, location, kCGMouseButtonLeft);
+    if (!event) {
+      return;
+    }
+
+    CGEventSetDoubleValueField(event, kCGMouseEventDeltaX, 0);
+    CGEventSetDoubleValueField(event, kCGMouseEventDeltaY, 0);
+    CGEventSetFlags(event, macos_input->kb_flags);
+    CGEventPost(kCGHIDEventTap, event);
+    CFRelease(event);
+    CGWarpMouseCursorPosition(location);
+  }
+
   /**
    * @brief Post a mouse event at the clamped display location.
    *

src/platform/macos/misc.mm

@@ -19,6 +19,7 @@
 // platform includes
 #include <arpa/inet.h>
 #include <dlfcn.h>
+#include <ApplicationServices/ApplicationServices.h>
 #include <Foundation/Foundation.h>
 #include <mach-o/dyld.h>
 #include <net/if_dl.h>
@@ -258,7 +259,25 @@ void set_thread_name(const std::string &name) {
   }
 
   void enable_mouse_keys() {
-    // Unimplemented
+    if (CGAssociateMouseAndMouseCursorPosition(true) != kCGErrorSuccess) {
+      BOOST_LOG(debug) << "Unable to associate mouse movement with cursor position"sv;
+    }
+
+    uint32_t display_count = 0;
+    if (CGGetOnlineDisplayList(0, nullptr, &display_count) != kCGErrorSuccess || display_count == 0) {
+      CGDisplayShowCursor(kCGNullDirectDisplay);
+      return;
+    }
+
+    std::vector<CGDirectDisplayID> displays(display_count);
+    if (CGGetOnlineDisplayList(display_count, displays.data(), &display_count) != kCGErrorSuccess) {
+      CGDisplayShowCursor(kCGNullDirectDisplay);
+      return;
+    }
+
+    for (uint32_t i = 0; i < display_count; ++i) {
+      CGDisplayShowCursor(displays[i]);
+    }
   }
 
   void streaming_will_start() {