Issue #1690 - Part 1: Fix MacOS version detection above 10.15.

Changes based on Mozilla bug 1616404 but supporting back to 10.7.

1 files changed, 86 insertions, 82 deletions

diff --git a/widget/cocoa/nsCocoaFeatures.mm b/widget/cocoa/nsCocoaFeatures.mm
index 0b22c51bd..e0fafb7d9 100644
--- a/widget/cocoa/nsCocoaFeatures.mm
+++ b/widget/cocoa/nsCocoaFeatures.mm
@@ -3,27 +3,29 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-// This file makes some assumptions about the versions of OS X.
-// We are assuming that the minor and bugfix versions are less than 16.
+// This file makes some assumptions about the versions of macOS.
+// We are assuming that the major, minor and bugfix versions are each less than
+// 256.
 // There are MOZ_ASSERTs for that.
 
-// The formula for the version integer based on OS X version 10.minor.bugfix is
-// 0x1000 + (minor << 4) + bugifix.  See AssembleVersion() below for major > 10.
-// Major version < 10 is not allowed.
-
-#define MAC_OS_X_VERSION_MASK      0x0000FFFF
-#define MAC_OS_X_VERSION_10_0_HEX  0x00001000
-#define MAC_OS_X_VERSION_10_7_HEX  0x00001070
-#define MAC_OS_X_VERSION_10_8_HEX  0x00001080
-#define MAC_OS_X_VERSION_10_9_HEX  0x00001090
-#define MAC_OS_X_VERSION_10_10_HEX 0x000010A0
-#define MAC_OS_X_VERSION_10_11_HEX 0x000010B0
-#define MAC_OS_X_VERSION_10_12_HEX 0x000010C0
-#define MAC_OS_X_VERSION_10_13_HEX 0x000010D0
-#define MAC_OS_X_VERSION_10_14_HEX 0x000010E0
-#define MAC_OS_X_VERSION_10_15_HEX 0x000010F0
-#define MAC_OS_X_VERSION_10_16_HEX 0x000A1000
-#define MAC_OS_X_VERSION_11_0_HEX  0x000B0000
+// The formula for the version integer is (major << 16) + (minor << 8) + bugfix.
+
+#define MACOS_VERSION_MASK 0x00FFFFFF
+#define MACOS_MAJOR_VERSION_MASK 0x00FFFFFF
+#define MACOS_MINOR_VERSION_MASK 0x00FFFFFF
+#define MACOS_BUGFIX_VERSION_MASK 0x00FFFFFF
+#define MACOS_VERSION_10_0_HEX 0x000A0000
+#define MACOS_VERSION_10_7_HEX 0x000A0700
+#define MACOS_VERSION_10_8_HEX 0x000A0800
+#define MACOS_VERSION_10_9_HEX 0x000A0900
+#define MACOS_VERSION_10_10_HEX 0x000A0A00
+#define MACOS_VERSION_10_11_HEX 0x000A0B00
+#define MACOS_VERSION_10_12_HEX 0x000A0C00
+#define MACOS_VERSION_10_13_HEX 0x000A0D00
+#define MACOS_VERSION_10_14_HEX 0x000A0E00
+#define MACOS_VERSION_10_15_HEX 0x000A0F00
+#define MACOS_VERSION_10_16_HEX 0x000A1000
+#define MACOS_VERSION_11_0_HEX 0x000B0000
 
 #include "nsCocoaFeatures.h"
 #include "nsCocoaUtils.h"
@@ -32,36 +34,36 @@
 
 #import <Cocoa/Cocoa.h>
 
-int32_t nsCocoaFeatures::mOSXVersion = 0;
+int32_t nsCocoaFeatures::mOSVersion = 0;
 
 // This should not be called with unchecked aMajor, which should be >= 10.
 inline int32_t AssembleVersion(int32_t aMajor, int32_t aMinor, int32_t aBugFix)
 {
-    MOZ_ASSERT(aMajor >= 10);
-    return MAC_OS_X_VERSION_10_0_HEX + (aMajor-10) * 0x100 + (aMinor << 4) + aBugFix;
+  MOZ_ASSERT(aMajor >= 10);
+  return (aMajor << 16) + (aMinor << 8) + aBugFix;
 }
 
 int32_t nsCocoaFeatures::ExtractMajorVersion(int32_t aVersion)
 {
-    MOZ_ASSERT((aVersion & MAC_OS_X_VERSION_MASK) == aVersion);
-    return ((aVersion & 0xFF00) - 0x1000) / 0x100 + 10;
+  MOZ_ASSERT((aVersion & MACOS_VERSION_MASK) == aVersion);
+  return (aVersion & 0xFF0000) >> 16;
 }
 
 int32_t nsCocoaFeatures::ExtractMinorVersion(int32_t aVersion)
 {
-    MOZ_ASSERT((aVersion & MAC_OS_X_VERSION_MASK) == aVersion);
-    return (aVersion & 0xF0) >> 4;
+  MOZ_ASSERT((aVersion & MACOS_VERSION_MASK) == aVersion);
+  return (aVersion & 0xFF00) >> 8;
 }
 
 int32_t nsCocoaFeatures::ExtractBugFixVersion(int32_t aVersion)
 {
-    MOZ_ASSERT((aVersion & MAC_OS_X_VERSION_MASK) == aVersion);
-    return aVersion & 0x0F;
+  MOZ_ASSERT((aVersion & MACOS_VERSION_MASK) == aVersion);
+  return aVersion & 0xFF;
 }
 
 static int intAtStringIndex(NSArray *array, int index)
 {
-    return [(NSString *)[array objectAtIndex:index] integerValue];
+  return [(NSString*)[array objectAtIndex:index] integerValue];
 }
 
 void nsCocoaFeatures::GetSystemVersion(int &major, int &minor, int &bugfix)
@@ -85,121 +87,123 @@ void nsCocoaFeatures::GetSystemVersion(int &major, int &minor, int &bugfix)
 
 int32_t nsCocoaFeatures::GetVersion(int32_t aMajor, int32_t aMinor, int32_t aBugFix)
 {
-    int32_t osxVersion;
-    if (aMajor < 10) {
-        aMajor = 10;
-        NS_ERROR("Couldn't determine OS X version, assuming 10.7");
-        osxVersion = MAC_OS_X_VERSION_10_7_HEX;
-    } else if (aMinor < 7) {
-        aMinor = 7;
-        NS_ERROR("OS X version too old, assuming 10.7");
-        osxVersion = MAC_OS_X_VERSION_10_7_HEX;
-    } else {
-        MOZ_ASSERT(aMajor == 10); // For now, even though we're ready...
-        MOZ_ASSERT(aMinor < 16);
-        MOZ_ASSERT(aBugFix >= 0);
-        MOZ_ASSERT(aBugFix < 16);
-        osxVersion = AssembleVersion(aMajor, aMinor, aBugFix);
-    }
-    MOZ_ASSERT(aMajor == ExtractMajorVersion(osxVersion));
-    MOZ_ASSERT(aMinor == ExtractMinorVersion(osxVersion));
-    MOZ_ASSERT(aBugFix == ExtractBugFixVersion(osxVersion));
-    return osxVersion;
+  int32_t macOSVersion;
+  if (aMajor < 10) {
+    aMajor = 10;
+    NS_ERROR("Couldn't determine macOS version, assuming 10.7");
+    macOSVersion = MACOS_VERSION_10_7_HEX;
+  } else if (aMajor == 10 && aMinor < 7) {
+    aMinor = 7;
+    NS_ERROR("macOS version too old, assuming 10.7");
+    macOSVersion = MACOS_VERSION_10_7_HEX;
+  } else {
+    MOZ_ASSERT(aMajor >= 10);
+    MOZ_ASSERT(aMajor < 256);
+    MOZ_ASSERT(aMinor >= 0);
+    MOZ_ASSERT(aMinor < 256);
+    MOZ_ASSERT(aBugFix >= 0);
+    MOZ_ASSERT(aBugFix < 256);
+    macOSVersion = AssembleVersion(aMajor, aMinor, aBugFix);
+  }
+  MOZ_ASSERT(aMajor == ExtractMajorVersion(macOSVersion));
+  MOZ_ASSERT(aMinor == ExtractMinorVersion(macOSVersion));
+  MOZ_ASSERT(aBugFix == ExtractBugFixVersion(macOSVersion));
+  return macOSVersion;
 }
 
 /*static*/ void
 nsCocoaFeatures::InitializeVersionNumbers()
 {
-    NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
 
-    // Provide an autorelease pool to avoid leaking Cocoa objects,
-    // as this gets called before the main autorelease pool is in place.
-    nsAutoreleasePool localPool;
+  // Provide an autorelease pool to avoid leaking Cocoa objects,
+  // as this gets called before the main autorelease pool is in place.
+  nsAutoreleasePool localPool;
 
-    int major, minor, bugfix;
-    GetSystemVersion(major, minor, bugfix);
-    mOSXVersion = GetVersion(major, minor, bugfix);
+  int major, minor, bugfix;
+  GetSystemVersion(major, minor, bugfix);
+  mOSVersion = GetVersion(major, minor, bugfix);
 
-    NS_OBJC_END_TRY_ABORT_BLOCK;
+  NS_OBJC_END_TRY_ABORT_BLOCK;
 }
 
 /* static */ int32_t
-nsCocoaFeatures::OSXVersion()
+nsCocoaFeatures::macOSVersion()
 {
-    // Don't let this be called while we're first setting the value...
-    MOZ_ASSERT((mOSXVersion & MAC_OS_X_VERSION_MASK) >= 0);
-    if (!mOSXVersion) {
-        mOSXVersion = -1;
-        InitializeVersionNumbers();
-    }
-    return mOSXVersion;
+  // Don't let this be called while we're first setting the value...
+  MOZ_ASSERT((mOSVersion & MACOS_VERSION_MASK) >= 0);
+  if (!mOSVersion) {
+    mOSVersion = -1;
+    InitializeVersionNumbers();
+  }
+  return mOSVersion;
 }
 
 /* static */ int32_t
-nsCocoaFeatures::OSXVersionMajor()
+nsCocoaFeatures::macOSVersionMajor()
 {
-    MOZ_ASSERT((OSXVersion() & MAC_OS_X_VERSION_10_0_HEX) == MAC_OS_X_VERSION_10_0_HEX);
-    return 10;
+  return ExtractMajorVersion(macOSVersion());
 }
 
 /* static */ int32_t
-nsCocoaFeatures::OSXVersionMinor()
+nsCocoaFeatures::macOSVersionMinor()
 {
-    return ExtractMinorVersion(OSXVersion());
+  return ExtractMinorVersion(macOSVersion());
 }
 
 /* static */ int32_t
-nsCocoaFeatures::OSXVersionBugFix()
+nsCocoaFeatures::macOSVersionBugFix()
 {
-    return ExtractBugFixVersion(OSXVersion());
+  return ExtractBugFixVersion(macOSVersion());
 }
 
 /* static */ bool
 nsCocoaFeatures::OnYosemiteOrLater()
 {
-    return (OSXVersion() >= MAC_OS_X_VERSION_10_10_HEX);
+  return (macOSVersion() >= MACOS_VERSION_10_10_HEX);
 }
 
 /* static */ bool
 nsCocoaFeatures::OnElCapitanOrLater()
 {
-    return (OSXVersion() >= MAC_OS_X_VERSION_10_11_HEX);
+  return (macOSVersion() >= MACOS_VERSION_10_11_HEX);
 }
 
 /* static */ bool
 nsCocoaFeatures::OnSierraOrLater()
 {
-    return (OSXVersion() >= MAC_OS_X_VERSION_10_12_HEX);
+  return (macOSVersion() >= MACOS_VERSION_10_12_HEX);
 }
 
 /* static */ bool 
 nsCocoaFeatures::OnHighSierraOrLater() 
 {
-    return (OSXVersion() >= MAC_OS_X_VERSION_10_13_HEX);
+  return (macOSVersion() >= MACOS_VERSION_10_13_HEX);
 }
 
 /* static */ bool 
 nsCocoaFeatures::OnMojaveOrLater() 
 {
-    return (OSXVersion() >= MAC_OS_X_VERSION_10_14_HEX);
+  return (macOSVersion() >= MACOS_VERSION_10_14_HEX);
 }
 
 /* static */ bool 
 nsCocoaFeatures::OnCatalinaOrLater() 
 {
-    return (OSXVersion() >= MAC_OS_X_VERSION_10_15_HEX);
+  return (macOSVersion() >= MACOS_VERSION_10_15_HEX);
 }
 
 /* static */ bool
-nsCocoaFeatures::OnBigSurOrLater() {
+nsCocoaFeatures::OnBigSurOrLater()
+{
   // Account for the version being 10.16 (which occurs when the
   // application is linked with an older SDK) or 11.0 on Big Sur.
-  return ((OSXVersion() >= MAC_OS_X_VERSION_10_16_HEX) ||
-          (OSXVersion() >= MAC_OS_X_VERSION_11_0_HEX));
+  return ((macOSVersion() >= MACOS_VERSION_10_16_HEX) ||
+          (macOSVersion() >= MACOS_VERSION_11_0_HEX));
 }
 
 /* static */ bool
 nsCocoaFeatures::IsAtLeastVersion(int32_t aMajor, int32_t aMinor, int32_t aBugFix)
 {
-    return OSXVersion() >= GetVersion(aMajor, aMinor, aBugFix);
+    return macOSVersion() >= GetVersion(aMajor, aMinor, aBugFix);
 }