Allow use of run-time OS version checks on macOS (bug#27810)

* src/nsterm.h (NSWindowTabbingMode): Define in pre-Sierra macOS.
(MAC_OS_X_VERSION_10_6, MAC_OS_X_VERSION_10_7, MAC_OS_X_VERSION_10_8,
MAC_OS_X_VERSION_10_9, MAC_OS_X_VERSION_10_12, HAVE_NATIVE_FS): Remove
defines.
(NSWindowStyleMaskFullScreen,
NSWindowCollectionBehaviorFullScreenPrimary,
NSApplicationPresentationFullScreen,
NSApplicationPresentationAutoHideToolbar): Define in macOS 10.6.
* src/nsterm.m (colorForEmacsRed, colorUsingDefaultColorSpace,
check_native_fs, ns_read_socket, ns_select, runAlertPanel,
initFrameFromEmacs, windowDidMiniaturize, windowDidEnterFullScreen,
windowDidExitFullScreen, isFullscreen, updateCollectionBehavior,
toggleFullScreen, constrainFrameRect, scrollerWidth, syms_of_nsterm):
Allow use of run-time checks and replace version check macros.
* src/nsfns.m (ns_screen_name): Use run-time OS version checks.
* src/macfont.m (macfont_draw): Use run-time OS version checks.
* src/nsmenu.m (menuWillOpen): Use run-time OS version checks.

Co-authored-by: Charles A. Roelli <charles@aurox.ch>

1 files changed, 13 insertions, 5 deletions

diff --git a/src/macfont.m b/src/macfont.m
index 4d310e47aec..19145f92c0a 100644
--- a/src/macfont.m
+++ b/src/macfont.m
@@ -2869,11 +2869,19 @@ macfont_draw (struct glyph_string *s, int from, int to, int x, int y,
              and synthetic bold looks thinner on such environments.
              Apple says there are no plans to address this issue
              (rdar://11644870) currently.  So we add a workaround.  */
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
-          CGContextSetLineWidth (context, synthetic_bold_factor * font_size
-                                 * [[FRAME_NS_VIEW(f) window] backingScaleFactor]);
-#else
-          CGContextSetLineWidth (context, synthetic_bold_factor * font_size);
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 1070
+          if ([[FRAME_NS_VIEW(f) window] respondsToSelector:
+                                           @selector(backingScaleFactor)])
+#endif
+            CGContextSetLineWidth (context, synthetic_bold_factor * font_size
+                                   * [[FRAME_NS_VIEW(f) window] backingScaleFactor]);
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 1070
+          else
+#endif
+#endif
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 1070
+            CGContextSetLineWidth (context, synthetic_bold_factor * font_size);
 #endif
           CG_SET_STROKE_COLOR_WITH_FACE_FOREGROUND (context, face, f);
         }