apprt/gtk-ng: setup basic css resources

src/apprt/gtk-ng/build/gresource.zig

@@ -16,6 +16,9 @@ pub const app_id = "com.mitchellh.ghostty";
 /// minimum adwaita version.
 pub const ui_path = "src/apprt/gtk-ng/ui";
 
+/// The path to the CSS files.
+pub const css_path = "src/apprt/gtk-ng/css";
+
 /// The possible icon sizes we'll embed into the gresource file.
 /// If any size doesn't exist then it will be an error. We could
 /// infer this completely from available files but we wouldn't be
@@ -36,6 +39,14 @@ pub const blueprints: []const Blueprint = &.{
     .{ .major = 1, .minor = 5, .name = "window" },
 };
 
+/// CSS files in css_path
+pub const css = [_][]const u8{
+    "style.css",
+    // "style-dark.css",
+    // "style-hc.css",
+    // "style-hc-dark.css",
+};
+
 pub const Blueprint = struct {
     major: u16,
     minor: u16,
@@ -45,7 +56,7 @@ pub const Blueprint = struct {
 /// The list of filepaths that we depend on. Used for the build
 /// system to have proper caching.
 pub const file_inputs = deps: {
-    const total = (icon_sizes.len * 2) + blueprints.len;
+    const total = (icon_sizes.len * 2) + blueprints.len + css.len;
     var deps: [total][]const u8 = undefined;
     var index: usize = 0;
     for (icon_sizes) |size| {
@@ -62,6 +73,10 @@ pub const file_inputs = deps: {
         });
         index += 1;
     }
+    for (css) |name| {
+        deps[index] = std.fmt.comptimePrint("{s}/{s}", .{ css_path, name });
+        index += 1;
+    }
     break :deps deps;
 };
 
@@ -120,6 +135,7 @@ pub fn main() !void {
         \\
     );
 
+    try genRoot(writer);
     try genIcons(writer);
     try genUi(alloc, writer, &ui_files);
 
@@ -173,6 +189,34 @@ fn genIcons(writer: anytype) !void {
     );
 }
 
+/// Generate the resources at the root prefix.
+fn genRoot(writer: anytype) !void {
+    try writer.print(
+        \\  <gresource prefix="{s}">
+        \\
+    , .{prefix});
+
+    const cwd = std.fs.cwd();
+    inline for (css) |name| {
+        const source = std.fmt.comptimePrint(
+            "{s}/{s}",
+            .{ css_path, name },
+        );
+        try cwd.access(source, .{});
+        try writer.print(
+            \\    <file compressed="true" alias="{s}">{s}</file>
+            \\
+        ,
+            .{ name, source },
+        );
+    }
+
+    try writer.writeAll(
+        \\  </gresource>
+        \\
+    );
+}
+
 /// Generate all the UI resources. This works by looking up all the
 /// blueprint files in `${ui_path}/{major}.{minor}/{name}.blp` and
 /// assuming these will be

src/apprt/gtk-ng/class/application.zig

@@ -484,6 +484,8 @@ pub const Application = extern struct {
 
             .set_title => Action.setTitle(target, value),
 
+            .show_gtk_inspector => Action.showGtkInspector(),
+
             // Unimplemented but todo on gtk-ng branch
             .close_window,
             .toggle_maximize,
@@ -499,7 +501,6 @@ pub const Application = extern struct {
             .open_config,
             .reload_config,
             .inspector,
-            .show_gtk_inspector,
             .desktop_notification,
             .present_terminal,
             .initial_size,
@@ -1115,6 +1116,10 @@ const Action = struct {
             },
         }
     }
+
+    pub fn showGtkInspector() void {
+        gtk.Window.setInteractiveDebugging(@intFromBool(true));
+    }
 };
 
 /// This sets various GTK-related environment variables as necessary

src/apprt/gtk-ng/css/style.css

@@ -0,0 +1,9 @@
+/* Application CSS that applies to the entire application.
+ *
+ * This is automatically loaded by AdwApplication:
+ * https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1.3/styles-and-appearance.html#custom-styles
+ */
+
+label {
+  color: red;
+}

src/apprt/gtk-ng/ui/1.2/surface.blp

@@ -3,6 +3,9 @@ using Adw 1;
 
 template $GhosttySurface: Adw.Bin {
   Overlay {
+    focusable: false;
+    focus-on-click: false;
+
     GLArea gl_area {
       hexpand: true;
       vexpand: true;