macOS: Add a new value titlebar-and-corners for :opt:hide_window_decorations that emulates the behavior of hide_window_decorations yes in older versions of kitty

docs/changelog.rst

@@ -42,6 +42,8 @@ Detailed list of changes
 
 - macOS: Fix a regression causing *burn-in* of text when resizing semi-transparent OS windows (:iss:`6439`)
 
+- macOS: Add a new value ``titlebar-and-corners`` for :opt:`hide_window_decorations` that emulates the behavior of ``hide_window_decorations yes`` in older versions of kitty
+
 - Remote control launch: Fix ``--env`` not implemented when using ``--cwd=current`` with the SSH kitten (:iss:`6438`)
 
 0.29.0 [2023-07-10]

glfw/cocoa_window.m

@@ -297,16 +297,12 @@ static NSUInteger getStyleMask(_GLFWwindow* window)
     NSUInteger styleMask = NSWindowStyleMaskMiniaturizable;
     if (window->ns.titlebar_hidden) styleMask |= NSWindowStyleMaskFullSizeContentView;
 
-    if (window->monitor || !window->decorated)
+    if (window->monitor || !window->decorated) {
         styleMask |= NSWindowStyleMaskBorderless;
-    else
-    {
-        styleMask |= NSWindowStyleMaskTitled |
-                     NSWindowStyleMaskClosable;
-
-        if (window->resizable)
-            styleMask |= NSWindowStyleMaskResizable;
+    } else {
+        styleMask |= NSWindowStyleMaskTitled | NSWindowStyleMaskClosable;
     }
+    if (window->resizable) styleMask |= NSWindowStyleMaskResizable;
 
     return styleMask;
 }
@@ -3021,6 +3017,11 @@ GLFWAPI void glfwCocoaSetWindowChrome(GLFWwindow *w, unsigned int color, bool us
             window->ns.titlebar_hidden = true;
             show_text_in_titlebar = false;
             break;
+        case 4:
+            decorations_desc = "no-titlebar-and-no-corners";
+            window->decorated = false;
+            has_shadow = true;
+            break;
         default:
             window->decorated = true;
             has_shadow = true;

kitty/options/definition.py

@@ -1026,12 +1026,12 @@ opt('hide_window_decorations', 'no',
     option_type='hide_window_decorations', ctype='uint',
     long_text='''
 Hide the window decorations (title-bar and window borders) with :code:`yes`. On
-macOS, :code:`titlebar-only` can be used to only hide the titlebar. Whether this
-works and exactly what effect it has depends on the window manager/operating
+macOS, :code:`titlebar-only` and :code:`titlebar-and-corners` can be used to only hide the titlebar and the rounded corners.
+Whether this works and exactly what effect it has depends on the window manager/operating
 system. Note that the effects of changing this option when reloading config
 are undefined. When using :code:`titlebar-only`, it is useful to also set
 :opt:`window_margin_width` and :opt:`placement_strategy` to prevent the rounded
-corners from clipping text.
+corners from clipping text. Or use :code:`titlebar-and-corners`.
 '''
     )
 

kitty/options/utils.py

@@ -594,6 +594,8 @@ def optional_edge_width(x: str) -> FloatEdges:
 def hide_window_decorations(x: str) -> int:
     if x == 'titlebar-only':
         return 0b10
+    if x == 'titlebar-and-corners':
+        return 0b100
     if to_bool(x):
         return 0b01
     return 0b00