better solution for enabling link mouseover cursors on macOS

The previous solution (using SetCapture) was eating keyboard input
in all SWELL windows when using REAPER-provided up-to-date SWELL.

Author: cfillion

src/CMakeLists.txt

@@ -65,7 +65,7 @@ add_library(reapack OBJECT
   config.cpp
   control.cpp
   database.cpp
-  dialog.cpp
+  dialog.cpp $<IF:$<BOOL:${APPLE}>,dialog.mm,>
   download.cpp
   event.cpp
   filedialog.cpp

src/dialog.cpp

@@ -72,6 +72,12 @@ WDL_DLGRET Dialog::Proc(HWND handle, UINT msg, WPARAM wParam, LPARAM lParam)
     if(wParam != SIZE_MINIMIZED)
       dlg->onResize();
     break;
+#ifdef __APPLE__
+  // This stops SWELL_SendMouseMessageImpl from continuously resetting the
+  // mouse cursor allowing NSTextViews to change it on mouse hover.
+  case WM_SETCURSOR:
+    return dlg->isTextEditUnderMouse();
+#endif
   case WM_DESTROY:
     dlg->onClose();
     break;

src/dialog.hpp

@@ -143,6 +143,10 @@ class Dialog {
   static WDL_DLGRET Proc(HWND, UINT, WPARAM, LPARAM);
   static int HandleKey(MSG *, accelerator_register_t *);
 
+#ifdef __APPLE__
+  bool isTextEditUnderMouse() const;
+#endif
+
   const int m_template;
   POINT m_minimumSize;
   WDL_WndSizer m_resizer;

src/dialog.mm

@@ -0,0 +1,13 @@
+#include "dialog.hpp"
+
+#include <AppKit/NSTextView.h>
+#include <swell/swell.h>
+
+bool Dialog::isTextEditUnderMouse() const
+{
+  POINT p;
+  GetCursorPos(&p);
+  const HWND ctrl = WindowFromPoint(p);
+
+  return ctrl && [static_cast<id>(ctrl) isKindOfClass:[NSTextView class]];
+}

src/richedit-gtk.cpp

@@ -29,9 +29,7 @@ RichEdit::RichEdit(HWND handle)
 {
 }
 
-RichEdit::~RichEdit()
-{
-}
+RichEdit::~RichEdit() = default;
 
 void RichEdit::onNotify(LPNMHDR, LPARAM)
 {

src/richedit-win32.cpp

@@ -53,9 +53,7 @@ RichEdit::RichEdit(HWND handle)
     SES_HYPERLINKTOOLTIPS, SES_HYPERLINKTOOLTIPS);
 }
 
-RichEdit::~RichEdit()
-{
-}
+RichEdit::~RichEdit() = default;
 
 void RichEdit::onNotify(LPNMHDR info, LPARAM lParam)
 {

src/richedit.mm

@@ -17,7 +17,9 @@
 
 #include "richedit.hpp"
 
-#include <Cocoa/Cocoa.h>
+#include <AppKit/NSAttributedString.h>
+#include <AppKit/NSColor.h>
+#include <AppKit/NSTextView.h>
 
 void RichEdit::Init()
 {
@@ -26,16 +28,9 @@
 RichEdit::RichEdit(HWND handle)
   : Control(handle)
 {
-  // hack: restore NSTextView's default mouse cursors (eg. hover links)
-  // this is an incomplete fix for the hyperlink's shy tooltips
-  SetCapture(handle);
 }
 
-RichEdit::~RichEdit()
-{
-  if(GetCapture() == handle())
-    ReleaseCapture();
-}
+RichEdit::~RichEdit() = default;
 
 void RichEdit::onNotify(LPNMHDR, LPARAM)
 {