macOS: remove deprecated use of property allowedFileTypes in class NSSavePanel

The recommended replacement requires macos ≥ 11.0 and a new framework: UniformTypeIdentifiers

CMake/fl_add_library.cmake

@@ -154,6 +154,11 @@ function(fl_add_library LIBNAME LIBTYPE SOURCES)
 
     if(APPLE AND NOT FLTK_BACKEND_X11)
       target_link_libraries(${TARGET_NAME} PUBLIC "-framework Cocoa")
+      if(NOT(${CMAKE_SYSTEM_VERSION} VERSION_LESS 20.0.0)) # a.k.a. macOS version ≥ 11.0
+        if (NOT (CMAKE_OSX_ARCHITECTURES STREQUAL "ppc" OR CMAKE_OSX_ARCHITECTURES STREQUAL "i386"))
+          target_link_libraries(${TARGET_NAME} PUBLIC "-framework UniformTypeIdentifiers")
+        endif()
+      endif()
     endif()
 
     # we must link fltk with cairo if Cairo or Wayland is enabled (or both)

CMake/setup.cmake

@@ -126,6 +126,12 @@ if(APPLE)
   else()
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -framework Cocoa")
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -framework Cocoa")
+    if(NOT(${CMAKE_SYSTEM_VERSION} VERSION_LESS 20.0.0)) # a.k.a. macOS version ≥ 11.0
+      if (NOT (CMAKE_OSX_ARCHITECTURES STREQUAL "ppc" OR CMAKE_OSX_ARCHITECTURES STREQUAL "i386"))
+        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -framework UniformTypeIdentifiers")
+        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -framework UniformTypeIdentifiers")
+      endif()
+    endif()
   endif(FLTK_BACKEND_X11)
 endif(APPLE)
 

CMake/variables.cmake

@@ -44,6 +44,11 @@ if(WIN32)
   list(APPEND FLTK_LDLIBS -lole32 -luuid -lcomctl32 -lws2_32)
 elseif(APPLE AND NOT FLTK_BACKEND_X11)
   list(APPEND FLTK_LDLIBS "-framework Cocoa")
+  if(NOT(${CMAKE_SYSTEM_VERSION} VERSION_LESS 20.0.0)) # a.k.a. macOS version ≥ 11.0
+    if (NOT (CMAKE_OSX_ARCHITECTURES STREQUAL "ppc" OR CMAKE_OSX_ARCHITECTURES STREQUAL "i386"))
+      list(APPEND FLTK_LDLIBS "-framework UniformTypeIdentifiers")
+    endif()
+  endif()
 elseif(FLTK_BACKEND_WAYLAND)
   list(APPEND FLTK_LDLIBS "-lwayland-cursor -lwayland-client -lxkbcommon -ldbus-1")
   if(USE_SYSTEM_LIBDECOR)

configure.ac

@@ -1005,6 +1005,10 @@ AS_CASE([$host_os_gui], [cygwin* | mingw*], [
 
     # MacOS X uses Cocoa for graphics.
     LIBS="$LIBS -framework Cocoa"
+    macosversion_maj=$(sw_vers -productVersion | cut -d. -f1)
+    AS_IF([test $macosversion_maj -ge 11], [
+      LIBS="$LIBS -framework UniformTypeIdentifiers"
+    ])
 
     AS_IF([test x$have_pthread = xyes], [
         AC_DEFINE([HAVE_PTHREAD])

src/Fl_Native_File_Chooser_MAC.mm

@@ -2,7 +2,7 @@
 // FLTK native OS file chooser widget for macOS
 //
 // Copyright 2004 Greg Ercolano.
-// Copyright 1998-2022 by Bill Spitzak and others.
+// Copyright 1998-2024 by Bill Spitzak and others.
 //
 // This library is free software. Distribution and use rights are outlined in
 // the file "COPYING" which should have been included with this file.  If this
@@ -28,6 +28,9 @@
 #include <FL/fl_string_functions.h>
 #define MAXFILTERS      80
 #import <Cocoa/Cocoa.h>
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0
+#  import <UniformTypeIdentifiers/UniformTypeIdentifiers.h>
+#endif
 
 #if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_9
 const NSInteger NSModalResponseOK = NSFileHandlingPanelOKButton;
@@ -513,6 +516,7 @@ static char *prepareMacFilter(int count, const char *filter, char **patterns) {
   BOOL saveas_confirm;
 }
 - (NSString *)panel:(id)sender userEnteredFilename:(NSString *)filename confirmed:(BOOL)okFlag;
+- (void)control_allowed_types:(const char *)p;
 - (void)changedPopup:(id)sender;
 - (void)panel:(NSSavePanel*)p;
 - (void)option:(BOOL)o;
@@ -525,6 +529,21 @@ static char *prepareMacFilter(int count, const char *filter, char **patterns) {
   // To get the latter, we need to change the name we return (hence the prefix):
   return [@ UNLIKELYPREFIX stringByAppendingString:filename];
 }
+- (void)control_allowed_types:(const char *)p
+{
+  NSString *ext = [NSString stringWithUTF8String:p];
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0
+  if (fl_mac_os_version >= 110000) {
+    UTType *type = [UTType typeWithFilenameExtension:ext]; // 11.0 + framework UniformTypeIdentifiers
+    [dialog setAllowedContentTypes:[NSArray arrayWithObject:type]]; // 11.0
+  }
+  else
+#endif
+  if (fl_mac_os_version >= 100900) {
+    [dialog performSelector:@selector(setAllowedFileTypes:) 
+                 withObject:[NSArray arrayWithObject:ext]];
+  }
+}
 - (void)changedPopup:(id)sender
 // runs when the save panel popup menu changes output file type
 // correspondingly changes the extension of the output file name
@@ -545,7 +564,7 @@ static char *prepareMacFilter(int count, const char *filter, char **patterns) {
   NSString *ns = [NSString stringWithFormat:@"%@.%@",
                   [[dialog performSelector:@selector(nameFieldStringValue)] stringByDeletingPathExtension],
                   [NSString stringWithUTF8String:p]];
-  if (fl_mac_os_version >= 100900) [dialog setAllowedFileTypes:[NSArray arrayWithObject:[NSString stringWithUTF8String:p]]];
+  [self control_allowed_types:p];
   free(s);
   [dialog performSelector:@selector(setNameFieldStringValue:) withObject:ns];
 }
@@ -785,7 +804,7 @@ int Fl_Quartz_Native_File_Chooser_Driver::post() {
           do q++; while (*q==' ' || *q=='{');
           p = fl_strdup(q);
           q = strchr(p, ','); if (q) *q = 0;
-          [_panel setAllowedFileTypes:[NSArray arrayWithObject:[NSString stringWithUTF8String:p]]];
+          [saveDelegate control_allowed_types:p];
           free(p);
         }
       }