Merge pull request #789 from ychin/fix_tabs_dragging

Fix dragging tabs not working properly

src/MacVim/MMBackend.m

@@ -2013,6 +2013,14 @@ extern GuiFont gui_mch_retain_font(GuiFont font);
         // based.
         int idx = *((int*)bytes);
 
+        // Also, this index doesn't take itself into account, so if the move is
+        // to a later tab, need to add one to it since Vim's tabpage_move *does*
+        // count the current tab.
+        int curtab_index = tabpage_index(curtab);
+        if (idx >= curtab_index) {
+            idx += 1;
+        }
+
         tabpage_move(idx);
     } else if (SetTextDimensionsMsgID == msgid || LiveResizeMsgID == msgid
             || SetTextDimensionsNoResizeWindowMsgID == msgid

src/MacVim/PSMTabBarControl/source/PSMTabBarCell.m

@@ -338,7 +338,10 @@
     if(([self state] == NSOnState) && ([[_controlView styleName] isEqualToString:@"Metal"]))
         cellFrame.size.width += 1.0;
     [_controlView lockFocus];
-    NSBitmapImageRep *rep = [[[NSBitmapImageRep alloc] initWithFocusedViewRect:cellFrame] autorelease];
+
+    NSBitmapImageRep *rep = [[self controlView] bitmapImageRepForCachingDisplayInRect:cellFrame];
+    [[self controlView] cacheDisplayInRect:cellFrame toBitmapImageRep:rep];
+
     [_controlView unlockFocus];
     NSImage *image = [[[NSImage alloc] initWithSize:[rep size]] autorelease];
     [image addRepresentation:rep];