Revert an attempt to implement a non‐native tab bar on NS.

5 files changed, 14 insertions, 559 deletions

diff --git a/src/nsfns.m b/src/nsfns.m
index 308586ef5a8..184fd71678e 100644
--- a/src/nsfns.m
+++ b/src/nsfns.m
@@ -614,43 +614,8 @@ ns_set_menu_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
 static void
 ns_set_tab_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
 {
-  /* Currently, when the tab bar changes state, the frame is resized.
-
-     TODO: It would be better if this didn't occur when 1) the frame
-     is full height or maximized or 2) when specified by
-     `frame-inhibit-implied-resize'.  */
-  int nlines;
-
+  /* Currently unimplemented.  */
   NSTRACE ("ns_set_tab_bar_lines");
-
-  if (FRAME_MINIBUF_ONLY_P (f))
-    return;
-
-  if (RANGED_FIXNUMP (0, value, INT_MAX))
-    nlines = XFIXNAT (value);
-  else
-    nlines = 0;
-
-  if (nlines)
-    update_frame_tab_bar (f);
-
-  {
-    int inhibit
-      = ((f->after_make_frame
-	  && !f->tab_bar_resized
-	  && (EQ (frame_inhibit_implied_resize, Qt)
-	      || (CONSP (frame_inhibit_implied_resize)
-		  && !NILP (Fmemq (Qtab_bar_lines,
-				   frame_inhibit_implied_resize))))
-	  && NILP (get_frame_param (f, Qfullscreen)))
-	 ? 0
-	 : 2);
-
-    NSTRACE_MSG ("inhibit:%d", inhibit);
-
-    frame_size_history_add (f, Qupdate_frame_tab_bar, 0, 0, Qnil);
-    adjust_frame_size (f, -1, -1, inhibit, 0, Qtab_bar_lines);
-  }
 }
 
 
@@ -1331,10 +1296,6 @@ DEFUN ("x-create-frame", Fx_create_frame, Sx_create_frame,
                          NILP (Vmenu_bar_mode)
                          ? make_fixnum (0) : make_fixnum (1),
                          NULL, NULL, RES_TYPE_NUMBER);
-  gui_default_parameter (f, parms, Qtab_bar_lines,
-                         NILP (Vtab_bar_mode)
-                         ? make_fixnum (0) : make_fixnum (1),
-                         NULL, NULL, RES_TYPE_NUMBER);
   gui_default_parameter (f, parms, Qtool_bar_lines,
                          NILP (Vtool_bar_mode)
                          ? make_fixnum (0) : make_fixnum (1),
@@ -1346,7 +1307,7 @@ DEFUN ("x-create-frame", Fx_create_frame, Sx_create_frame,
                          RES_TYPE_STRING);
 
   parms = get_geometry_from_preferences (dpyinfo, parms);
-  window_prompting = gui_figure_window_size (f, parms, true, true,
+  window_prompting = gui_figure_window_size (f, parms, false, true,
                                              &x_width, &x_height);
 
   tem = gui_display_get_arg (dpyinfo, parms, Qunsplittable, 0, 0,
@@ -2839,10 +2800,6 @@ frame_geometry (Lisp_Object frame, Lisp_Object attribute)
   int native_right = f->left_pos + outer_width - border;
   int native_bottom = f->top_pos + outer_height - border;
   int internal_border_width = FRAME_INTERNAL_BORDER_WIDTH (f);
-  int tab_bar_height = FRAME_TABBAR_HEIGHT (f);
-  int tab_bar_width = (tab_bar_height
-		       ? outer_width - 2 * internal_border_width
-		       : 0);
   int tool_bar_height = FRAME_TOOLBAR_HEIGHT (f);
   int tool_bar_width = (tool_bar_height
 			? outer_width - 2 * internal_border_width
@@ -2858,7 +2815,7 @@ frame_geometry (Lisp_Object frame, Lisp_Object attribute)
 		   native_right, native_bottom);
   else if (EQ (attribute, Qinner_edges))
     return list4i (native_left + internal_border_width,
-		   native_top + tab_bar_height + tool_bar_height + internal_border_width,
+		   native_top + tool_bar_height + internal_border_width,
 		   native_right - internal_border_width,
 		   native_bottom - internal_border_width);
   else
@@ -2877,9 +2834,6 @@ frame_geometry (Lisp_Object frame, Lisp_Object attribute)
 		    Fcons (make_fixnum (0), make_fixnum (title_height))),
 	     Fcons (Qmenu_bar_external, Qnil),
 	     Fcons (Qmenu_bar_size, Fcons (make_fixnum (0), make_fixnum (0))),
-	     Fcons (Qtab_bar_size,
-		    Fcons (make_fixnum (tab_bar_width),
-			   make_fixnum (tab_bar_height))),
 	     Fcons (Qtool_bar_external,
 		    FRAME_EXTERNAL_TOOL_BAR (f) ? Qt : Qnil),
 	     Fcons (Qtool_bar_position, FRAME_TOOL_BAR_POSITION (f)),
@@ -2917,9 +2871,6 @@ and width values are in pixels.
 `menu-bar-size' is a cons of the width and height of the menu bar of
   FRAME.
 
-`tab-bar-size' is a cons of the width and height of the tab bar of
-  FRAME.
-
 `tool-bar-external', if non-nil, means the tool bar is external (never
   included in the inner edges of FRAME).
 
diff --git a/src/nsmenu.m b/src/nsmenu.m
index 3faa3f27087..817f8cff184 100644
--- a/src/nsmenu.m
+++ b/src/nsmenu.m
@@ -993,322 +993,6 @@ ns_menu_show (struct frame *f, int x, int y, int menuflags,
 
 /* ==========================================================================
 
-    Tabbar: externally-called functions
-
-   ========================================================================== */
-
-void
-free_frame_tab_bar (struct frame *f)
-/* --------------------------------------------------------------------------
-    Under NS we just hide the tabbar until it might be needed again.
-   -------------------------------------------------------------------------- */
-{
-  EmacsView *view = FRAME_NS_VIEW (f);
-
-  NSTRACE ("free_frame_tab_bar");
-
-  block_input ();
-  view->wait_for_tab_bar = NO;
-
-  /* Note: This triggers an animation, which calls windowDidResize
-     repeatedly.  */
-  f->output_data.ns->in_animation = 1;
-  [[view tabbar] setVisible: NO];
-  f->output_data.ns->in_animation = 0;
-
-  unblock_input ();
-}
-
-void
-update_frame_tab_bar (struct frame *f)
-/* --------------------------------------------------------------------------
-    Update tabbar contents.
-   -------------------------------------------------------------------------- */
-{
-  int i, k = 0;
-  EmacsView *view = FRAME_NS_VIEW (f);
-  EmacsTabbar *tabbar = [view tabbar];
-  int oldh;
-
-  NSTRACE ("update_frame_tab_bar");
-
-  if (view == nil || tabbar == nil) return;
-  block_input ();
-
-  oldh = FRAME_TABBAR_HEIGHT (f);
-
-#ifdef NS_IMPL_COCOA
-  [tabbar clearActive];
-#else
-  [tabbar clearAll];
-#endif
-
-  /* Update EmacsTabbar as in GtkUtils, build items list.  */
-  for (i = 0; i < f->n_tab_bar_items; ++i)
-    {
-#define TABPROP(IDX) AREF (f->tab_bar_items, \
-                           i * TAB_BAR_ITEM_NSLOTS + (IDX))
-
-      BOOL enabled_p = !NILP (TABPROP (TAB_BAR_ITEM_ENABLED_P));
-      int idx;
-      ptrdiff_t img_id;
-      struct image *img;
-      Lisp_Object image;
-      Lisp_Object helpObj;
-      const char *helpText;
-
-      /* Check if this is a separator.  */
-      if (EQ (TABPROP (TAB_BAR_ITEM_TYPE), Qt))
-        {
-          /* Skip separators.  Newer macOS don't show them, and on
-             GNUstep they are wide as a button, thus overflowing the
-             tabbar most of the time.  */
-          continue;
-        }
-
-      /* If image is a vector, choose the image according to the
-	 button state.  */
-      image = TABPROP (TAB_BAR_ITEM_IMAGES);
-      if (VECTORP (image))
-	{
-          /* NS tabbar auto-computes disabled and selected images.  */
-          idx = TAB_BAR_IMAGE_ENABLED_SELECTED;
-	  eassert (ASIZE (image) >= idx);
-	  image = AREF (image, idx);
-	}
-      else
-        {
-          idx = -1;
-        }
-      helpObj = TABPROP (TAB_BAR_ITEM_HELP);
-      if (NILP (helpObj))
-        helpObj = TABPROP (TAB_BAR_ITEM_CAPTION);
-      helpText = NILP (helpObj) ? "" : SSDATA (helpObj);
-
-      /* Ignore invalid image specifications.  */
-      if (!valid_image_p (image))
-        {
-          /* Don't log anything, GNUS makes invalid images all the time.  */
-          continue;
-        }
-
-      img_id = lookup_image (f, image);
-      img = IMAGE_FROM_ID (f, img_id);
-      prepare_image_for_display (f, img);
-
-      if (img->load_failed_p || img->pixmap == nil)
-        {
-          NSLog (@"Could not prepare tabbar image for display.");
-          continue;
-        }
-
-      [tabbar addDisplayItemWithImage: img->pixmap
-                                   idx: k++
-                                   tag: i
-                              helpText: helpText
-                               enabled: enabled_p];
-#undef TABPROP
-    }
-
-  if (![tabbar isVisible])
-    {
-      f->output_data.ns->in_animation = 1;
-      [tabbar setVisible: YES];
-      f->output_data.ns->in_animation = 0;
-    }
-
-#ifdef NS_IMPL_COCOA
-  if ([tabbar changed])
-    {
-      /* Inform app that tabbar has changed.  */
-      NSDictionary *dict = [tabbar configurationDictionary];
-      NSMutableDictionary *newDict = [dict mutableCopy];
-      NSEnumerator *keys = [[dict allKeys] objectEnumerator];
-      id key;
-      while ((key = [keys nextObject]) != nil)
-        {
-          NSObject *val = [dict objectForKey: key];
-          if ([val isKindOfClass: [NSArray class]])
-            {
-              [newDict setObject:
-                         [tabbar tabbarDefaultItemIdentifiers: tabbar]
-                          forKey: key];
-              break;
-            }
-        }
-      [tabbar setConfigurationFromDictionary: newDict];
-      [newDict release];
-    }
-#endif
-
-  if (oldh != FRAME_TABBAR_HEIGHT (f))
-    [view updateFrameSize:YES];
-  if (view->wait_for_tab_bar && FRAME_TABBAR_HEIGHT (f) > 0)
-    {
-      view->wait_for_tab_bar = NO;
-      [view setNeedsDisplay: YES];
-    }
-
-  unblock_input ();
-}
-
-
-/* ==========================================================================
-
-    Tabbar: class implementation
-
-   ========================================================================== */
-
-@implementation EmacsTabbar
-
-- (instancetype)initForView: (EmacsView *)view withIdentifier: (NSString *)identifier
-{
-  NSTRACE ("[EmacsTabbar initForView: withIdentifier:]");
-
-  self = [super initWithIdentifier: identifier];
-  emacsView = view;
-  [self setDisplayMode: NSToolbarDisplayModeIconOnly];
-  [self setSizeMode: NSToolbarSizeModeSmall];
-  [self setDelegate: self];
-  identifierToItem = [[NSMutableDictionary alloc] initWithCapacity: 10];
-  activeIdentifiers = [[NSMutableArray alloc] initWithCapacity: 8];
-  prevIdentifiers = nil;
-  prevEnablement = enablement = 0L;
-  return self;
-}
-
-- (void)dealloc
-{
-  NSTRACE ("[EmacsTabbar dealloc]");
-
-  [prevIdentifiers release];
-  [activeIdentifiers release];
-  [identifierToItem release];
-  [super dealloc];
-}
-
-- (void) clearActive
-{
-  NSTRACE ("[EmacsTabbar clearActive]");
-
-  [prevIdentifiers release];
-  prevIdentifiers = [activeIdentifiers copy];
-  [activeIdentifiers removeAllObjects];
-  prevEnablement = enablement;
-  enablement = 0L;
-}
-
-- (void) clearAll
-{
-  NSTRACE ("[EmacsTabbar clearAll]");
-
-  [self clearActive];
-  while ([[self items] count] > 0)
-    [self removeItemAtIndex: 0];
-}
-
-- (BOOL) changed
-{
-  NSTRACE ("[EmacsTabbar changed]");
-
-  return [activeIdentifiers isEqualToArray: prevIdentifiers] &&
-    enablement == prevEnablement ? NO : YES;
-}
-
-- (void) addDisplayItemWithImage: (EmacsImage *)img
-                             idx: (int)idx
-                             tag: (int)tag
-                        helpText: (const char *)help
-                         enabled: (BOOL)enabled
-{
-  NSTRACE ("[EmacsTabbar addDisplayItemWithImage: ...]");
-
-  /* 1) come up w/identifier */
-  NSString *identifier
-    = [NSString stringWithFormat: @"%lu", (unsigned long)[img hash]];
-  [activeIdentifiers addObject: identifier];
-
-  /* 2) create / reuse item */
-  NSToolbarItem *item = [identifierToItem objectForKey: identifier];
-  if (item == nil)
-    {
-      item = [[[NSToolbarItem alloc] initWithItemIdentifier: identifier]
-               autorelease];
-      [item setImage: img];
-      [item setTabTip: [NSString stringWithUTF8String: help]];
-      [item setTarget: emacsView];
-      [item setAction: @selector (tabbarClicked:)];
-      [identifierToItem setObject: item forKey: identifier];
-    }
-
-#ifdef NS_IMPL_GNUSTEP
-  [self insertItemWithItemIdentifier: identifier atIndex: idx];
-#endif
-
-  [item setTag: tag];
-  [item setEnabled: enabled];
-
-  /* 3) update state */
-  enablement = (enablement << 1) | (enabled == YES);
-}
-
-/* This overrides super's implementation, which automatically sets
-   all items to enabled state (for some reason).  */
-- (void)validateVisibleItems
-{
-  NSTRACE ("[EmacsTabbar validateVisibleItems]");
-}
-
-
-/* delegate methods */
-
-- (NSToolbarItem *)tabbar: (NSToolbar *)tabbar
-      itemForItemIdentifier: (NSString *)itemIdentifier
-  willBeInsertedIntoTabbar: (BOOL)flag
-{
-  NSTRACE ("[EmacsTabbar tabbar: ...]");
-
-  /* Look up NSToolbarItem by identifier and return...  */
-  return [identifierToItem objectForKey: itemIdentifier];
-}
-
-- (NSArray *)tabbarDefaultItemIdentifiers: (NSToolbar *)tabbar
-{
-  NSTRACE ("[EmacsTabbar tabbarDefaultItemIdentifiers:]");
-
-  /* Return entire set.  */
-  return activeIdentifiers;
-}
-
-/* for configuration palette (not yet supported) */
-- (NSArray *)tabbarAllowedItemIdentifiers: (NSToolbar *)tabbar
-{
-  NSTRACE ("[EmacsTabbar tabbarAllowedItemIdentifiers:]");
-
-  /* return entire set...  */
-  return activeIdentifiers;
-  //return [identifierToItem allKeys];
-}
-
-- (void)setVisible:(BOOL)shown
-{
-  NSTRACE ("[EmacsTabbar setVisible:%d]", shown);
-
-  [super setVisible:shown];
-}
-
-
-/* optional and unneeded */
-/* - tabbarWillAddItem: (NSNotification *)notification { } */
-/* - tabbarDidRemoveItem: (NSNotification *)notification { } */
-/* - (NSArray *)tabbarSelectableItemIdentifiers: (NSToolbar *)tabbar */
-
-@end  /* EmacsTabbar */
-
-
-
-/* ==========================================================================
-
     Toolbar: externally-called functions
 
    ========================================================================== */
diff --git a/src/nsterm.h b/src/nsterm.h
index fc1745877d2..9773eb3e662 100644
--- a/src/nsterm.h
+++ b/src/nsterm.h
@@ -397,7 +397,6 @@ typedef id instancetype;
 
    ========================================================================== */
 
-@class EmacsTabbar;
 @class EmacsToolbar;
 
 #ifdef NS_IMPL_COCOA
@@ -422,18 +421,14 @@ typedef id instancetype;
    struct frame *emacsframe;
    int rows, cols;
    int scrollbarsNeedingUpdate;
-   EmacsTabbar *tabbar;
    EmacsToolbar *toolbar;
    NSRect ns_userRect;
-   BOOL wait_for_tab_bar;
    BOOL wait_for_tool_bar;
    }
 
 /* AppKit-side interface */
 - (instancetype)menuDown: (id)sender;
-- (instancetype)tabbarClicked: (id)item;
 - (instancetype)toolbarClicked: (id)item;
-- (instancetype)toggleTabbar: (id)sender;
 - (instancetype)toggleToolbar: (id)sender;
 - (void)keyDown: (NSEvent *)theEvent;
 - (void)mouseDown: (NSEvent *)theEvent;
@@ -442,11 +437,9 @@ typedef id instancetype;
 
 /* Emacs-side interface */
 - (instancetype) initFrameFromEmacs: (struct frame *) f;
-- (void) createTabbar: (struct frame *)f;
 - (void) createToolbar: (struct frame *)f;
 - (void) setRows: (int) r andColumns: (int) c;
 - (void) setWindowClosing: (BOOL)closing;
-- (EmacsTabbar *) tabbar;
 - (EmacsToolbar *) toolbar;
 - (void) deleteWorkingText;
 - (void) updateFrameSize: (BOOL) delay;
@@ -519,45 +512,6 @@ typedef id instancetype;
 
 /* ==========================================================================
 
-   Tabbar
-
-   ========================================================================== */
-
-@class EmacsImage;
-
-#ifdef NS_IMPL_COCOA
-@interface EmacsTabbar : NSToolbar <NSToolbarDelegate>
-#else
-@interface EmacsTabbar : NSToolbar
-#endif
-   {
-     EmacsView *emacsView;
-     NSMutableDictionary *identifierToItem;
-     NSMutableArray *activeIdentifiers;
-     NSArray *prevIdentifiers;
-     unsigned long enablement, prevEnablement;
-   }
-- (instancetype) initForView: (EmacsView *)view withIdentifier: (NSString *)identifier;
-- (void) clearActive;
-- (void) clearAll;
-- (BOOL) changed;
-- (void) addDisplayItemWithImage: (EmacsImage *)img
-                             idx: (int)idx
-                             tag: (int)tag
-                        helpText: (const char *)help
-                         enabled: (BOOL)enabled;
-
-/* delegate methods */
-- (NSToolbarItem *)tabbar: (NSToolbar *)tabbar
-     itemForItemIdentifier: (NSString *)itemIdentifier
- willBeInsertedIntoTabbar: (BOOL)flag;
-- (NSArray *)tabbarDefaultItemIdentifiers: (NSToolbar *)tabbar;
-- (NSArray *)tabbarAllowedItemIdentifiers: (NSToolbar *)tabbar;
-@end
-
-
-/* ==========================================================================
-
    Toolbar
 
    ========================================================================== */
@@ -799,7 +753,6 @@ extern EmacsMenu *svcsMenu;
 #define KEY_NS_NEW_FRAME               ((1<<28)|(0<<16)|12)
 #define KEY_NS_TOGGLE_TOOLBAR          ((1<<28)|(0<<16)|13)
 #define KEY_NS_SHOW_PREFS              ((1<<28)|(0<<16)|14)
-#define KEY_NS_TOGGLE_TABBAR           ((1<<28)|(0<<16)|15)
 
 /* Could use list to store these, but rest of emacs has a big infrastructure
    for managing a table of bitmap "records".  */
@@ -970,7 +923,6 @@ struct ns_output
   NSColor *cursor_color;
   NSColor *foreground_color;
   NSColor *background_color;
-  EmacsTabbar *tabbar;
   EmacsToolbar *toolbar;
 #else
   void *view;
@@ -978,7 +930,6 @@ struct ns_output
   void *cursor_color;
   void *foreground_color;
   void *background_color;
-  void *tabbar;
   void *toolbar;
 #endif
 
@@ -1023,9 +974,6 @@ struct ns_output
   /* The height of the titlebar decoration (included in NSWindow's frame).  */
   int titlebar_height;
 
-  /* The height of the tabbar if displayed, else 0.  */
-  int tabbar_height;
-
   /* The height of the toolbar if displayed, else 0.  */
   int toolbar_height;
 
@@ -1081,16 +1029,6 @@ struct x_output
                        [[FRAME_NS_VIEW (f) window] frame]               \
                        styleMask:[[FRAME_NS_VIEW (f) window] styleMask]])))
 
-/* Compute pixel height of the tabbar.  */
-#define FRAME_TABBAR_HEIGHT(f)                                          \
-  (([[FRAME_NS_VIEW (f) window] tabbar] == nil                  	\
-    || ! [[FRAME_NS_VIEW (f) window] tabbar].isVisible) ?		\
-   0                                                                    \
-   : (int)(NSHeight([NSWindow contentRectForFrameRect:                  \
-                     [[FRAME_NS_VIEW (f) window] frame]                 \
-                     styleMask:[[FRAME_NS_VIEW (f) window] styleMask]]) \
-           - NSHeight([[[FRAME_NS_VIEW (f) window] contentView] frame])))
-
 /* Compute pixel height of the toolbar.  */
 #define FRAME_TOOLBAR_HEIGHT(f)                                         \
   (([[FRAME_NS_VIEW (f) window] toolbar] == nil                         \
@@ -1231,8 +1169,6 @@ extern const char *ns_get_defaults_value (const char *key);
 extern void ns_init_locale (void);
 
 /* in nsmenu */
-extern void update_frame_tab_bar (struct frame *f);
-extern void free_frame_tab_bar (struct frame *f);
 extern void update_frame_tool_bar (struct frame *f);
 extern void free_frame_tool_bar (struct frame *f);
 extern Lisp_Object find_and_return_menu_selection (struct frame *f,
@@ -1340,7 +1276,6 @@ extern char gnustep_base_version[];  /* version tracking */
 #define NSWindowCollectionBehaviorFullScreenPrimary (1 << 7)
 #define NSApplicationPresentationFullScreen         (1 << 10)
 #define NSApplicationPresentationAutoHideToolbar    (1 << 11)
-#define NSApplicationPresentationAutoHideTabbar     (1 << 12)
 #define NSAppKitVersionNumber10_7                   1138
 #endif /* !defined (MAC_OS_X_VERSION_10_7) */
 
diff --git a/src/nsterm.m b/src/nsterm.m
index ff2d195d2fa..c8094d0ee37 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -1088,15 +1088,11 @@ ns_update_begin (struct frame *f)
 
   if ([view isFullscreen] && [view fsIsNative])
   {
-    // Fix reappearing tool bar or tab bar in fullscreen for Mac OS X 10.7
-    BOOL tarbar_visible = NO;
-    NSToolbar *tabbar = [FRAME_NS_VIEW (f) tabbar];
-    if (! tarbar_visible != ! [tabbar isVisible])
-      [tabbar setVisible: tarbar_visible];
-    BOOL toolbar_visible = FRAME_EXTERNAL_TOOL_BAR (f) ? YES : NO;
+    // Fix reappearing tool bar in fullscreen for Mac OS X 10.7
+    BOOL tbar_visible = FRAME_EXTERNAL_TOOL_BAR (f) ? YES : NO;
     NSToolbar *toolbar = [FRAME_NS_VIEW (f) toolbar];
-    if (! toolbar_visible != ! [toolbar isVisible])
-      [toolbar setVisible: toolbar_visible];
+    if (! tbar_visible != ! [toolbar isVisible])
+      [toolbar setVisible: tbar_visible];
   }
 #endif
 }
@@ -1687,7 +1683,7 @@ ns_set_offset (struct frame *f, int xoff, int yoff, int change_grav)
           f->top_pos = f->size_hint_flags & YNegative
             ? ([screen visibleFrame].size.height + f->top_pos
                - FRAME_PIXEL_HEIGHT (f) - FRAME_NS_TITLEBAR_HEIGHT (f)
-               - FRAME_TABBAR_HEIGHT (f) - FRAME_TOOLBAR_HEIGHT (f))
+               - FRAME_TOOLBAR_HEIGHT (f))
             : f->top_pos;
 #ifdef NS_IMPL_GNUSTEP
 	  if (f->left_pos < 100)
@@ -1705,7 +1701,7 @@ ns_set_offset (struct frame *f, int xoff, int yoff, int change_grav)
             f->left_pos = FRAME_PIXEL_WIDTH (parent) - FRAME_PIXEL_WIDTH (f) + f->left_pos;
 
           if (f->top_pos < 0)
-            f->top_pos = FRAME_PIXEL_HEIGHT (parent) + FRAME_TABBAR_HEIGHT (parent) + FRAME_TOOLBAR_HEIGHT (parent)
+            f->top_pos = FRAME_PIXEL_HEIGHT (parent) + FRAME_TOOLBAR_HEIGHT (parent)
               - FRAME_PIXEL_HEIGHT (f) + f->top_pos;
         }
 
@@ -1768,7 +1764,6 @@ ns_set_window_size (struct frame *f,
   wr.size.height = pixelheight;
   if (! [view isFullscreen])
     wr.size.height += FRAME_NS_TITLEBAR_HEIGHT (f)
-      + FRAME_TABBAR_HEIGHT (f)
       + FRAME_TOOLBAR_HEIGHT (f);
 
   /* Do not try to constrain to this screen.  We may have multiple
@@ -1785,7 +1780,7 @@ ns_set_window_size (struct frame *f,
 	   Fcons (make_fixnum (wr.size.width), make_fixnum (wr.size.height)),
 	   make_fixnum (f->border_width),
 	   make_fixnum (FRAME_NS_TITLEBAR_HEIGHT (f)),
-	   make_fixnum (FRAME_TABBAR_HEIGHT (f) + FRAME_TOOLBAR_HEIGHT (f))));
+	   make_fixnum (FRAME_TOOLBAR_HEIGHT (f))));
 
   [window setFrame: wr display: YES];
 
@@ -1822,12 +1817,10 @@ ns_set_undecorated (struct frame *f, Lisp_Object new_value, Lisp_Object old_valu
           [window setStyleMask: ((window.styleMask | FRAME_DECORATED_FLAGS)
                                   ^ FRAME_UNDECORATED_FLAGS)];
 
-          [view createTabbar: f];
           [view createToolbar: f];
         }
       else
         {
-          [window setTabbar: nil];
           [window setToolbar: nil];
           /* Do I need to release the toolbar here?  */
 
@@ -2412,7 +2405,7 @@ frame_set_mouse_pixel_position (struct frame *f, int pix_x, int pix_y)
   CGPoint mouse_pos =
     CGPointMake(f->left_pos + pix_x,
                 f->top_pos + pix_y +
-                FRAME_NS_TITLEBAR_HEIGHT(f) + FRAME_TABBAR_HEIGHT(f) + FRAME_TOOLBAR_HEIGHT(f));
+                FRAME_NS_TITLEBAR_HEIGHT(f) + FRAME_TOOLBAR_HEIGHT(f));
   CGWarpMouseCursorPosition (mouse_pos);
 #endif
 }
@@ -6107,7 +6100,6 @@ not_in_argv (NSString *arg)
 - (void)dealloc
 {
   NSTRACE ("[EmacsView dealloc]");
-  [tabbar release];
   [toolbar release];
   if (fs_state == FULLSCREEN_BOTH)
     [nonfs_window release];
@@ -6959,40 +6951,19 @@ not_in_argv (NSString *arg)
 
   if (! [self isFullscreen])
     {
-      int tabbar_height;
       int toolbar_height;
 #ifdef NS_IMPL_GNUSTEP
       // GNUstep does not always update the tool bar height.  Force it.
       if (toolbar && [toolbar isVisible])
           update_frame_tool_bar (emacsframe);
-      if (tabbar && [tabbar isVisible])
-          update_frame_tab_bar (emacsframe);
 #endif
 
-      tabbar_height = FRAME_TABBAR_HEIGHT (emacsframe);
-      if (tabbar_height < 0)
-        tabbar_height = 35;
-
       toolbar_height = FRAME_TOOLBAR_HEIGHT (emacsframe);
       if (toolbar_height < 0)
         toolbar_height = 35;
 
       extra = FRAME_NS_TITLEBAR_HEIGHT (emacsframe)
-        + tabbar_height + toolbar_height;
-    }
-
-  if (wait_for_tab_bar)
-    {
-      /* The tabbar height is always 0 in fullscreen and undecorated
-         frames, so don't wait for it to become available.  */
-      if (FRAME_TABBAR_HEIGHT (emacsframe) == 0
-          && FRAME_UNDECORATED (emacsframe) == false
-          && ! [self isFullscreen])
-        {
-          NSTRACE_MSG ("Waiting for tabbar");
-          return;
-        }
-      wait_for_tab_bar = NO;
+        + toolbar_height;
     }
 
   if (wait_for_tool_bar)
@@ -7013,7 +6984,6 @@ not_in_argv (NSString *arg)
   newh = (int)wr.size.height - extra;
 
   NSTRACE_SIZE ("New size", NSMakeSize (neww, newh));
-  NSTRACE_MSG ("FRAME_TABBAR_HEIGHT: %d", FRAME_TABBAR_HEIGHT (emacsframe));
   NSTRACE_MSG ("FRAME_TOOLBAR_HEIGHT: %d", FRAME_TOOLBAR_HEIGHT (emacsframe));
   NSTRACE_MSG ("FRAME_NS_TITLEBAR_HEIGHT: %d", FRAME_NS_TITLEBAR_HEIGHT (emacsframe));
 
@@ -7088,7 +7058,6 @@ not_in_argv (NSString *arg)
   if (! [self isFullscreen])
     {
       extra = FRAME_NS_TITLEBAR_HEIGHT (emacsframe)
-        + FRAME_TABBAR_HEIGHT (emacsframe)
         + FRAME_TOOLBAR_HEIGHT (emacsframe);
     }
 
@@ -7315,33 +7284,6 @@ not_in_argv (NSString *arg)
 }
 
 
-- (void)createTabbar: (struct frame *)f
-{
-  EmacsView *view = (EmacsView *)FRAME_NS_VIEW (f);
-  NSWindow *window = [view window];
-
-  tabbar = [[EmacsTabbar alloc] initForView: self withIdentifier:
-                   [NSString stringWithFormat: @"Emacs Frame %d",
-                             ns_window_num]];
-  [tabbar setVisible: NO];
-  [window setTabbar: tabbar];
-
-  /* Don't set frame garbaged until tab bar is up to date?
-     This avoids an extra clear and redraw (flicker) at frame creation.  */
-  wait_for_tab_bar = NO;
-
-
-#ifdef NS_IMPL_COCOA
-  {
-    NSButton *toggleButton;
-    toggleButton = [window standardWindowButton: NSWindowToolbarButton];
-    [toggleButton setTarget: self];
-    [toggleButton setAction: @selector (toggleTabbar: )];
-  }
-#endif
-}
-
-
 - (void)createToolbar: (struct frame *)f
 {
   EmacsView *view = (EmacsView *)FRAME_NS_VIEW (f);
@@ -7448,10 +7390,6 @@ not_in_argv (NSString *arg)
                    NILP (tem) ? "Emacs" : SSDATA (tem)];
   [win setTitle: name];
 
-  /* tabbar support */
-  if (! FRAME_UNDECORATED (f))
-    [self createTabbar: f];
-
   /* toolbar support */
   if (! FRAME_UNDECORATED (f))
     [self createToolbar: f];
@@ -7787,8 +7725,7 @@ not_in_argv (NSString *arg)
     }
   else
     {
-      BOOL tarbar_visible = NO;
-      BOOL toolbar_visible = FRAME_EXTERNAL_TOOL_BAR (emacsframe) ? YES : NO;
+      BOOL tbar_visible = FRAME_EXTERNAL_TOOL_BAR (emacsframe) ? YES : NO;
 #if defined (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1070 \
   && MAC_OS_X_VERSION_MIN_REQUIRED <= 1070
       unsigned val = (unsigned)[NSApp presentationOptions];
@@ -7801,14 +7738,12 @@ not_in_argv (NSString *arg)
             = NSApplicationPresentationAutoHideDock
             | NSApplicationPresentationAutoHideMenuBar
             | NSApplicationPresentationFullScreen
-            | NSApplicationPresentationAutoHideTabbar
             | NSApplicationPresentationAutoHideToolbar;
 
           [NSApp setPresentationOptions: options];
         }
 #endif
-      [tabbar setVisible:tarbar_visible];
-      [toolbar setVisible:toolbar_visible];
+      [toolbar setVisible:tbar_visible];
     }
 }
 
@@ -7849,8 +7784,6 @@ not_in_argv (NSString *arg)
 #if defined (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
   [self updateCollectionBehavior];
 #endif
-  [tabbar setVisible:NO];
-
   if (FRAME_EXTERNAL_TOOL_BAR (emacsframe))
     {
       [toolbar setVisible:YES];
@@ -8164,53 +8097,6 @@ not_in_argv (NSString *arg)
 }
 
 
-- (EmacsTabbar *)tabbar
-{
-  return tabbar;
-}
-
-
-/* This gets called on tabbar button click.  */
-- (instancetype)tabbarClicked: (id)item
-{
-  NSEvent *theEvent;
-  int idx = [item tag] * TAB_BAR_ITEM_NSLOTS;
-
-  NSTRACE ("[EmacsView tabbarClicked:]");
-
-  if (!emacs_event)
-    return self;
-
-  /* Send first event (for some reason two needed).  */
-  theEvent = [[self window] currentEvent];
-  emacs_event->kind = TAB_BAR_EVENT;
-  XSETFRAME (emacs_event->arg, emacsframe);
-  EV_TRAILER (theEvent);
-
-  emacs_event->kind = TAB_BAR_EVENT;
-  /* XSETINT (emacs_event->code, 0); */
-  emacs_event->arg = AREF (emacsframe->tab_bar_items,
-			   idx + TAB_BAR_ITEM_KEY);
-  emacs_event->modifiers = EV_MODIFIERS (theEvent);
-  EV_TRAILER (theEvent);
-  return self;
-}
-
-
-- (instancetype)toggleTabbar: (id)sender
-{
-  NSTRACE ("[EmacsView toggleTabbar:]");
-
-  if (!emacs_event)
-    return self;
-
-  emacs_event->kind = NS_NONKEY_EVENT;
-  emacs_event->code = KEY_NS_TOGGLE_TABBAR;
-  EV_TRAILER ((id)nil);
-  return self;
-}
-
-
 - (EmacsToolbar *)toolbar
 {
   return toolbar;
diff --git a/src/xterm.c b/src/xterm.c
index e98e590df71..428d970206e 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -12085,7 +12085,6 @@ x_free_frame_resources (struct frame *f)
         XDestroyWindow (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f));
 
       free_frame_menubar (f);
-      free_frame_tab_bar (f);
 
       if (f->shell_position)
 	xfree (f->shell_position);