Tabs: Use TabLineFill fg, fix colorscheme w/ transparent/inverse highlights

runtime/colors/retrobox.vim

@@ -4,7 +4,7 @@
 " Maintainer:   Maxim Kim <habamax@gmail.com>, ported from gruvbox8 of Lifepillar <lifepillar@lifepillar.me>
 " Website:      https://www.github.com/vim/colorschemes
 " License:      Vim License (see `:help license`)
-" Last Change:  2025 Jan 07
+" Last Change:  2025 Feb 15
 
 " Generated by Colortemplate v2.2.3
 
@@ -150,7 +150,7 @@ else
   hi StatusLine guifg=#bdae93 guibg=#3c3836 gui=bold,reverse cterm=bold,reverse
   hi StatusLineNC guifg=#ebdbb2 guibg=#3c3836 gui=reverse cterm=reverse
   hi TabLine guifg=#665c54 guibg=#ebdbb2 gui=NONE cterm=NONE
-  hi TabLineFill guifg=#ebdbb2 guibg=#ebdbb2 gui=NONE cterm=NONE
+  hi TabLineFill guifg=#3c3836 guibg=#ebdbb2 gui=NONE cterm=NONE
   hi TabLineSel guifg=#282828 guibg=#fbf1c7 gui=bold cterm=bold
   hi ToolbarButton guifg=#282828 guibg=#bdae93 gui=bold cterm=bold
   hi ToolbarLine guifg=NONE guibg=NONE gui=NONE ctermfg=NONE ctermbg=NONE cterm=NONE
@@ -332,7 +332,7 @@ if s:t_Co >= 256
     hi StatusLine ctermfg=144 ctermbg=237 cterm=bold,reverse
     hi StatusLineNC ctermfg=187 ctermbg=237 cterm=reverse
     hi TabLine ctermfg=59 ctermbg=187 cterm=NONE
-    hi TabLineFill ctermfg=187 ctermbg=187 cterm=NONE
+    hi TabLineFill ctermfg=237 ctermbg=187 cterm=NONE
     hi TabLineSel ctermfg=235 ctermbg=230 cterm=bold
     hi ToolbarButton ctermfg=235 ctermbg=144 cterm=bold
     hi ToolbarLine ctermfg=NONE ctermbg=NONE cterm=NONE

src/MacVim/MMTabline/MMTabline.h

@@ -20,13 +20,15 @@
 @property (nonatomic, readonly) NSInteger numberOfTabs;
 @property (nonatomic, retain, readonly) MMHoverButton *addTabButton;
 
-@property (nonatomic, retain) NSColor *tablineBgColor;
-@property (nonatomic, retain) NSColor *tablineFgColor;
-@property (nonatomic, retain) NSColor *tablineSelBgColor;
-@property (nonatomic, retain) NSColor *tablineSelFgColor;
-@property (nonatomic, retain) NSColor *tablineFillFgColor;
-
-// Derived colors that cannot be set directly
+// Main colors
+@property (nonatomic, readonly) NSColor *tablineBgColor;
+@property (nonatomic, readonly) NSColor *tablineFgColor;
+@property (nonatomic, readonly) NSColor *tablineSelBgColor;
+@property (nonatomic, readonly) NSColor *tablineSelFgColor;
+@property (nonatomic, readonly) NSColor *tablineFillBgColor;
+@property (nonatomic, readonly) NSColor *tablineFillFgColor;
+
+// Derived colors from the main ones
 @property (nonatomic, readonly) NSColor *tablineUnfocusedFgColor;
 @property (nonatomic, readonly) NSColor *tablineUnfocusedSelFgColor;
 @property (nonatomic, readonly) NSColor *tablineStrokeColor;
@@ -69,7 +71,7 @@
 /// colors based on the system light/dark modes.
 - (void)setColorsTabBg:(NSColor *)tabBg tabFg:(NSColor *)tabFg
                  selBg:(NSColor *)selBg selFg:(NSColor *)selFg
-                  fill:(NSColor *)fill;
+                fillBg:(NSColor *)fill fillFg:(NSColor *)fillFg;
 
 /// Lets the tabline calculate best colors to use based on background and
 /// foreground colors of the selected tab. The colors cannot be nil.

src/MacVim/MMTabline/MMTabline.m

@@ -67,7 +67,7 @@ @implementation MMTabline
 @synthesize tablineFgColor = _tablineFgColor;
 @synthesize tablineSelBgColor = _tablineSelBgColor;
 @synthesize tablineSelFgColor = _tablineSelFgColor;
-@synthesize tablineFillFgColor = _tablineFillFgColor;
+@synthesize tablineFillBgColor = _tablineFillBgColor;
 @synthesize tablineUnfocusedFgColor = _tablineUnfocusedFgColor;
 @synthesize tablineUnfocusedSelFgColor = _tablineUnfocusedSelFgColor;
 
@@ -150,7 +150,7 @@ - (BOOL)wantsUpdateLayer { return YES; }
 
 - (void)updateLayer
 {
-    self.layer.backgroundColor = self.tablineFillFgColor.CGColor;
+    self.layer.backgroundColor = self.tablineFillBgColor.CGColor;
 }
 
 - (void)viewDidChangeEffectiveAppearance
@@ -253,63 +253,33 @@ - (NSColor *)tablineBgColor
     }
 }
 
-- (void)setTablineBgColor:(NSColor *)color
-{
-    _tablineBgColor = color;
-    [self updateTabStates];
-}
-
 - (NSColor *)tablineFgColor
 {
     return _tablineFgColor ?: NSColor.secondaryLabelColor;
 }
 
-- (void)setTablineFgColor:(NSColor *)color
-{
-    _tablineFgColor = color;
-    _tablineUnfocusedFgColor = nil;
-    [self updateTabStates];
-}
-
 - (NSColor *)tablineSelBgColor
 {
     return _tablineSelBgColor ?: (_appearance == AppearanceLight || _appearance == AppearanceLightHighContrast)
         ? [NSColor colorWithWhite:0.95 alpha:1]
         : [NSColor colorWithWhite:0.4 alpha:1];
 }
 
-- (void)setTablineSelBgColor:(NSColor *)color
-{
-    _tablineSelBgColor = color;
-    [self updateTabStates];
-}
-
 - (NSColor *)tablineSelFgColor
 {
     return _tablineSelFgColor ?: NSColor.controlTextColor;
 }
 
-- (void)setTablineSelFgColor:(NSColor *)color
-{
-    _tablineSelFgColor = color;
-    _tablineUnfocusedSelFgColor = nil;
-    _addTabButton.fgColor = color;
-    _backwardScrollButton.fgColor = color;
-    _forwardScrollButton.fgColor = color;
-    [self updateTabStates];
-}
-
-- (NSColor *)tablineFillFgColor
+- (NSColor *)tablineFillBgColor
 {
-    return _tablineFillFgColor ?: (_appearance == AppearanceLight || _appearance == AppearanceLightHighContrast)
+    return _tablineFillBgColor ?: (_appearance == AppearanceLight || _appearance == AppearanceLightHighContrast)
         ? [NSColor colorWithWhite:0.85 alpha:1]
         : [NSColor colorWithWhite:0.23 alpha:1];
 }
 
-- (void)setTablineFillFgColor:(NSColor *)color
+- (NSColor *)tablineFillFgColor
 {
-    _tablineFillFgColor = color;
-    self.needsDisplay = YES;
+    return _addTabButton.fgColor;
 }
 
 - (NSColor *)tablineUnfocusedFgColor
@@ -570,22 +540,22 @@ - (MMTab *)tabAtIndex:(NSInteger)index
 
 - (void)setColorsTabBg:(NSColor *)tabBg tabFg:(NSColor *)tabFg
                  selBg:(NSColor *)selBg selFg:(NSColor *)selFg
-                  fill:(NSColor *)fill
+                fillBg:(NSColor *)fillBg fillFg:(NSColor *)fillFg
 {
     // Don't use the property mutators as we just want to update the states in
     // one go at the end.
     _tablineSelBgColor = selBg;
     _tablineSelFgColor = selFg;
     _tablineBgColor = tabBg;
     _tablineFgColor = tabFg;
-    _tablineFillFgColor = fill;
+    _tablineFillBgColor = fillBg;
 
     _tablineUnfocusedFgColor = [_tablineFgColor blendedColorWithFraction:0.4 ofColor:_tablineBgColor];
     _tablineUnfocusedSelFgColor = [_tablineSelFgColor blendedColorWithFraction:0.38 ofColor:_tablineSelBgColor];
 
-    _addTabButton.fgColor = _tablineSelFgColor;
-    _backwardScrollButton.fgColor = _tablineSelFgColor;
-    _forwardScrollButton.fgColor = _tablineSelFgColor;
+    _addTabButton.fgColor = fillFg;
+    _backwardScrollButton.fgColor = fillFg;
+    _forwardScrollButton.fgColor = fillFg;
 
     [self updateTabStates];
     self.needsDisplay = YES;
@@ -615,7 +585,7 @@ - (void)setAutoColorsSelBg:(NSColor *)back fg:(NSColor *)fore;
     _tablineUnfocusedFgColor = [_tablineFgColor blendedColorWithFraction:0.4 ofColor:_tablineBgColor];
     _tablineUnfocusedSelFgColor = [_tablineSelFgColor blendedColorWithFraction:0.38 ofColor:_tablineSelBgColor];
 
-    _tablineFillFgColor = (brightness > 0.5)
+    _tablineFillBgColor = (brightness > 0.5)
         ? [back blendedColorWithFraction:0.25 ofColor:NSColor.blackColor]
         : [back blendedColorWithFraction:0.18 ofColor:NSColor.whiteColor];
 

src/MacVim/MMVimView.m

@@ -40,7 +40,8 @@
     MMTabColorTypeTabFg,
     MMTabColorTypeSelBg,
     MMTabColorTypeSelFg,
-    MMTabColorTypeFill,
+    MMTabColorTypeFillBg,
+    MMTabColorTypeFillFg,
     MMTabColorTypeCount
 } MMTabColorType;
 
@@ -377,7 +378,7 @@ - (void)refreshTabProperties
 {
     NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
     tabline.showsTabScrollButtons = [ud boolForKey:MMShowTabScrollButtonsKey];
-    [self updateTablineColors];
+    [self updateTablineColors:MMTabColorsModeCount];
 }
 
 - (void)createScrollbarWithIdentifier:(int32_t)ident type:(int)type
@@ -469,25 +470,35 @@ - (void)finishPlaceScrollbars
     }
 }
 
-- (void)updateTablineColors
+- (void)updateTablineColors:(MMTabColorsMode)mode
 {
     NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
     MMTabColorsMode tabColorsMode = [ud integerForKey:MMTabColorsModeKey];
+    if (tabColorsMode >= MMTabColorsModeCount || tabColorsMode < 0) {
+        // Catch-all for invalid values, which could be useful if we add new
+        // modes and a user goes back and uses an old version of MacVim.
+        tabColorsMode = MMTabColorsModeAutomatic;
+    }
+    if (mode != MMTabColorsModeCount && mode != tabColorsMode) {
+        // Early out to avoid unnecessary updates if this is not relevant.
+        return;
+    }
     if (tabColorsMode == MMTabColorsModeDefaultColors) {
         [tabline setColorsTabBg:nil
                           tabFg:nil
                           selBg:nil
                           selFg:nil
-                           fill:nil];
+                         fillBg:nil
+                         fillFg:nil];
     } else if (tabColorsMode == MMTabColorsModeVimColorscheme) {
         [tabline setColorsTabBg:tabColors[MMTabColorTypeTabBg]
                           tabFg:tabColors[MMTabColorTypeTabFg]
                           selBg:tabColors[MMTabColorTypeSelBg]
                           selFg:tabColors[MMTabColorTypeSelFg]
-                           fill:tabColors[MMTabColorTypeFill]];
+                         fillBg:tabColors[MMTabColorTypeFillBg]
+                         fillFg:tabColors[MMTabColorTypeFillFg]];
     } else {
-        // tabColorsMode == MMTabColorsModeAutomatic, but catch-all in case it's
-        // set to an out-of-range number.
+        // tabColorsMode == MMTabColorsModeAutomatic
         NSColor *back = [[self textView] defaultBackgroundColor];
         NSColor *fore = [[self textView] defaultForegroundColor];
         [tabline setAutoColorsSelBg:back fg:fore];
@@ -498,7 +509,7 @@ - (void)updateTablineColors
 - (void)setDefaultColorsBackground:(NSColor *)back foreground:(NSColor *)fore
 {
     [textView setDefaultColorsBackground:back foreground:fore];
-    [self updateTablineColors];
+    [self updateTablineColors:MMTabColorsModeAutomatic];
 
     CALayer *backedLayer = [self layer];
     if (backedLayer) {
@@ -527,9 +538,9 @@ - (void)setTablineColorsTabBg:(NSColor *)tabBg tabFg:(NSColor *)tabFg
     tabColors[MMTabColorTypeTabFg] = [tabFg retain];
     tabColors[MMTabColorTypeSelBg] = [selBg retain];
     tabColors[MMTabColorTypeSelFg] = [selFg retain];
-    tabColors[MMTabColorTypeFill] = [fillBg retain];
-    (void)fillFg; // We don't use fillFg as we don't draw anything in the empty area
-    [self updateTablineColors];
+    tabColors[MMTabColorTypeFillBg] = [fillBg retain];
+    tabColors[MMTabColorTypeFillFg] = [fillFg retain];
+    [self updateTablineColors:MMTabColorsModeVimColorscheme];
 }
 
 

src/MacVim/MMWindowController.m

@@ -743,7 +743,7 @@ - (void)setTablineColorsTabBg:(NSColor *)tabBg tabFg:(NSColor *)tabFg
 - (void)setWindowColorToTablineColor
 {
     NSColor *defaultBg = vimView.textView.defaultBackgroundColor;
-    NSColor *tablineColor = vimView.tabline.tablineFillFgColor;
+    NSColor *tablineColor = vimView.tabline.tablineFillBgColor;
     if (defaultBg.alphaComponent == 1.0) {
         [self setWindowBackgroundColor:tablineColor];
     } else {

src/MacVim/MacVimTests/MacVimTests.m

@@ -33,6 +33,10 @@ @interface MMVimController (Private)
 - (void)handleMessage:(int)msgid data:(NSData *)data;
 @end
 
+@interface MMVimView (Tests)
+- (void)updateTablineColors:(MMTabColorsMode)mode;
+@end
+
 // Test harness
 @implementation MMAppController (Tests)
 - (NSMutableArray*)vimControllers {
@@ -954,6 +958,63 @@ - (void) testResizeVimView {
     XCTAssertFalse(win.isRenderBlocked);
 }
 
+#pragma mark Tabs tests
+
+- (void)testTabColors {
+    [self createTestVimWindow];
+
+    MMAppController *app = MMAppController.sharedInstance;
+    MMVimView *vimView = [[[app keyVimController] windowController] vimView];
+    MMTabline *tabline = [vimView tabline];
+
+    // Test Vim colorscheme mode
+    [self setDefault:MMTabColorsModeKey toValue:@(MMTabColorsModeVimColorscheme)];
+
+    [self sendStringToVim:@":hi Normal guifg=#ff0000 guibg=#00ff00\n" withMods:0];
+    [self waitForVimProcess];
+    [self sendStringToVim:@":hi TabLineSel guifg=#010203 guibg=#040506\n" withMods:0];
+    [self sendStringToVim:@":hi clear TabLineFill\n" withMods:0];
+    [self sendStringToVim:@":hi TabLine guifg=#111213 guibg=NONE gui=inverse\n" withMods:0];
+    [self waitForEventHandlingAndVimProcess];
+
+    // Normal highlight groups
+    XCTAssertEqualObjects(tabline.tablineSelBgColor, [NSColor colorWithRgbInt:0x040506]);
+    XCTAssertEqualObjects(tabline.tablineSelFgColor, [NSColor colorWithRgbInt:0x010203]);
+    // Cleared highlight group should be transparent and fall through to Normal group
+    XCTAssertEqualObjects(tabline.tablineFillBgColor, [NSColor colorWithRgbInt:0x00ff00]);
+    XCTAssertEqualObjects(tabline.tablineFillFgColor, [NSColor colorWithRgbInt:0xff0000]);
+    // One color is transparent, and inversed fg/bg
+    XCTAssertEqualObjects(tabline.tablineBgColor, [NSColor colorWithRgbInt:0x111213]);
+    XCTAssertEqualObjects(tabline.tablineFgColor, [NSColor colorWithRgbInt:0x00ff00]);
+
+    // Cleared highlight group with inversed fg/bg
+    [self sendStringToVim:@":hi TabLineFill gui=inverse\n" withMods:0];
+    [self waitForEventHandlingAndVimProcess];
+    XCTAssertEqualObjects(tabline.tablineFillBgColor, [NSColor colorWithRgbInt:0xff0000]);
+    XCTAssertEqualObjects(tabline.tablineFillFgColor, [NSColor colorWithRgbInt:0x00ff00]);
+
+    // Test automatic colors mode
+    // Selected tab should have the exact same background as Normal colors
+    [self setDefault:MMTabColorsModeKey toValue:@(MMTabColorsModeAutomatic)];
+    [vimView updateTablineColors:MMTabColorsModeAutomatic];
+    XCTAssertEqualObjects(tabline.tablineSelBgColor, [NSColor colorWithRgbInt:0x00ff00]);
+
+    // Test default colors mode
+    // We just verify that the colors changed, rather than asserting the exact
+    // colors to make it easy to update tuning on them in the future.
+    [self setDefault:MMTabColorsModeKey toValue:@(MMTabColorsModeDefaultColors)];
+    [vimView updateTablineColors:MMTabColorsModeDefaultColors];
+
+    vimView.window.appearance = [NSAppearance appearanceNamed: NSAppearanceNameAqua];
+    [self waitForEventHandling];
+    XCTAssertEqual(tabline.tablineFillBgColor.colorSpace.colorSpaceModel, NSColorSpaceModelGray);
+    XCTAssertGreaterThan(tabline.tablineFillBgColor.whiteComponent, 0.5);
+
+    vimView.window.appearance = [NSAppearance appearanceNamed: NSAppearanceNameDarkAqua];
+    [self waitForEventHandling];
+    XCTAssertLessThan(tabline.tablineFillBgColor.whiteComponent, 0.5);
+}
+
 #pragma mark Full screen tests
 
 - (void)waitForNativeFullscreenEnter {

src/MacVim/Miscellaneous.h

@@ -110,6 +110,7 @@ typedef enum : NSInteger {
     MMTabColorsModeDefaultColors = 0,   ///< Use default colors based on macOS light/dark modes
     MMTabColorsModeAutomatic,           ///< Automatically derive tab colors based on foreground/background colors
     MMTabColorsModeVimColorscheme,      ///< Use Vim colorscheme TabLine/TabLineSel/TabLineFill colors
+    MMTabColorsModeCount
 } MMTabColorsMode;
 
 enum {