From d0e9385946298c1a59774b22f85670bb96e35af7 Mon Sep 17 00:00:00 2001
From: Aly Raffauf <aly@raffauflabs.com>
Date: Fri, 17 May 2024 16:17:00 -0400
Subject: [PATCH] theme/sway: added option to hide gtk titlebars if using
 pkgs.sway

---
 homeManagerModules/desktop/sway/default.nix |  8 +++++-
 homeManagerModules/desktop/theme.nix        | 32 +++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/homeManagerModules/desktop/sway/default.nix b/homeManagerModules/desktop/sway/default.nix
index 4af6478b..652a1238 100644
--- a/homeManagerModules/desktop/sway/default.nix
+++ b/homeManagerModules/desktop/sway/default.nix
@@ -55,9 +55,15 @@
     };
 
     wayland.windowManager.sway.enable = true;
-    wayland.windowManager.sway.package = pkgs.swayfx;
+    wayland.windowManager.sway.package = lib.mkDefault pkgs.swayfx;
     wayland.windowManager.sway.wrapperFeatures.gtk = true;
     wayland.windowManager.sway.checkConfig = false;
+
+    alyraffauf.desktop.theme.gtk.hideTitleBar =
+      if config.wayland.windowManager.sway.package == pkgs.sway
+      then true
+      else false;
+
     wayland.windowManager.sway.config = let
       modifier = "Mod4";
 
diff --git a/homeManagerModules/desktop/theme.nix b/homeManagerModules/desktop/theme.nix
index 9b89e66e..1af215df 100644
--- a/homeManagerModules/desktop/theme.nix
+++ b/homeManagerModules/desktop/theme.nix
@@ -23,6 +23,11 @@
         };
         type = lib.types.package;
       };
+      hideTitleBar = lib.mkOption {
+        description = "Whether to hide GTK3/4 titlebars (useful for some window managers).";
+        default = false;
+        type = lib.types.bool;
+      };
     };
     alyraffauf.desktop.theme.iconTheme = {
       name = lib.mkOption {
@@ -180,6 +185,33 @@
       gtk3.extraConfig = lib.attrsets.optionalAttrs (config.alyraffauf.desktop.theme.colors.preferDark) {gtk-application-prefer-dark-theme = 1;};
 
       gtk4.extraConfig = lib.attrsets.optionalAttrs (config.alyraffauf.desktop.theme.colors.preferDark) {gtk-application-prefer-dark-theme = 1;};
+
+      gtk3.extraCss =
+        if config.alyraffauf.desktop.theme.gtk.hideTitleBar
+        then ''
+          /* No (default) title bar on wayland */
+          headerbar.default-decoration {
+            /* You may need to tweak these values depending on your GTK theme */
+            margin-bottom: 50px;
+            margin-top: -100px;
+
+            background: transparent;
+            padding: 0;
+            border: 0;
+            min-height: 0;
+            font-size: 0;
+            box-shadow: none;
+          }
+
+          /* rm -rf window shadows */
+          window.csd,             /* gtk4? */
+          window.csd decoration { /* gtk3 */
+            box-shadow: none;
+          }
+        ''
+        else "/* */";
+
+      gtk4.extraCss = config.gtk.gtk3.extraCss;
     };
 
     dconf.settings = {