Report better version in About MacVim, and store last used version

src/MacVim/MMAppController.m

@@ -263,6 +263,7 @@ + (void)initialize
         [NSNumber numberWithBool:NO],     MMRendererClipToRowKey,
         [NSNumber numberWithBool:YES],    MMAllowForceClickLookUpKey,
         [NSNumber numberWithBool:NO],     MMUpdaterPrereleaseChannelKey,
+        @"",                              MMLastUsedBundleVersionKey,
         nil];
 
     [[NSUserDefaults standardUserDefaults] registerDefaults:dict];
@@ -459,6 +460,51 @@ - (void)applicationDidFinishLaunching:(NSNotification *)notification
 
     [self addInputSourceChangedObserver];
 
+    NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
+
+    NSString *lastUsedVersion = [ud stringForKey:MMLastUsedBundleVersionKey];
+    NSString *currentVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:
+            @"CFBundleVersion"];
+    // This will be used for showing a "What's New" dialog box in the future. For
+    // now, just update the stored version for future use so later versions will
+    // be able to tell whether to show this dialog box or not.
+    if (currentVersion && currentVersion.length != 0) {
+        if (!lastUsedVersion || [lastUsedVersion length] == 0) {
+            [ud setValue:currentVersion forKey:MMLastUsedBundleVersionKey];
+        } else {
+            // If the current version is larger, set that to be stored. Don't
+            // want to do it otherwise to prevent testing older versions flipping
+            // the stored version back to an old one.
+            NSArray<NSString*> *lastUsedVersionItems = [lastUsedVersion componentsSeparatedByString:@"."];
+            NSArray<NSString*> *currentVersionItems = [currentVersion componentsSeparatedByString:@"."];
+            // Compare two arrays lexographically. We just assume that version
+            // numbers are also X.Y.Z… with no "beta" etc texts.
+            bool currentVersionLarger = NO;
+            for (int i = 0; i < currentVersionItems.count && i < lastUsedVersionItems.count; i++) {
+                if (i >= currentVersionItems.count) {
+                    currentVersionLarger = NO;
+                    break;
+                }
+                if (i >= lastUsedVersionItems.count) {
+                    currentVersionLarger = YES;
+                    break;
+                }
+                if (currentVersionItems[i].integerValue > lastUsedVersionItems[i].integerValue) {
+                    currentVersionLarger = YES;
+                    break;
+                }
+                else if (currentVersionItems[i].integerValue < lastUsedVersionItems[i].integerValue) {
+                    currentVersionLarger = NO;
+                    break;
+                }
+            }
+
+            if (currentVersionLarger) {
+                [ud setValue:currentVersion forKey:MMLastUsedBundleVersionKey];
+            }
+        }
+    }
+
     ASLogInfo(@"MacVim finished launching");
 }
 

src/MacVim/MMApplication.m

@@ -53,7 +53,7 @@ - (void)orderFrontStandardAboutPanel:(id)sender
     NSString *marketingVersion = [[NSBundle mainBundle]
             objectForInfoDictionaryKey:@"CFBundleShortVersionString"];
     NSString *title = [NSString stringWithFormat:
-            @"Custom Version %@ (%@)", marketingVersion, version];
+            @"Vim %@ (MacVim r%@)", marketingVersion, version];
 
     [self orderFrontStandardAboutPanelWithOptions:
             [NSDictionary dictionaryWithObjectsAndKeys:

src/MacVim/Miscellaneous.h

@@ -64,6 +64,7 @@ extern NSString *MMCmdLineAlignBottomKey;
 extern NSString *MMRendererClipToRowKey;
 extern NSString *MMAllowForceClickLookUpKey;
 extern NSString *MMUpdaterPrereleaseChannelKey;
+extern NSString *MMLastUsedBundleVersionKey;    // The last used version of MacVim before this launch
 
 
 // Enum for MMUntitledWindowKey

src/MacVim/Miscellaneous.m

@@ -60,6 +60,7 @@
 NSString *MMRendererClipToRowKey      = @"MMRendererClipToRow";
 NSString *MMAllowForceClickLookUpKey      = @"MMAllowForceClickLookUp";
 NSString *MMUpdaterPrereleaseChannelKey   = @"MMUpdaterPrereleaseChannel";
+NSString *MMLastUsedBundleVersionKey        = @"MMLastUsedBundleVersion";
 
 
 @implementation NSIndexSet (MMExtras)