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apprt/gtk: support dark window decorations with GtkWindow (#3096)

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While builds with libawdaita support light and dark window decorations,
builds without libadwaita are always light. This PR adds support for the
dark GtkWindow variant when `window-theme` is `dark` or `auto`.

Before (window-theme=auto): 

![before](https://github.com/user-attachments/assets/619988e5-1a7e-4f8f-8533-3b376f896c24)

After (window-theme=auto):

![after](https://github.com/user-attachments/assets/bb1d172b-d14e-42fd-90bd-84bf058bb5fc)

Note: `window-theme = ghostty` is broken with GtkWindow and not fixed in
this PR.
This commit is contained in:
Mitchell Hashimoto
2024-12-23 19:29:57 -08:00
committed by GitHub
parent 42cdaa4545 415902fe83
commit 46ae112820
1 changed files with 6 additions and 0 deletions
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6
src/apprt/gtk/App.zig
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@ -221,6 +221,9 @@ pub fn init(core_app: *CoreApp, opts: Options) !App {
switch (config.@"window-theme") {
.system, .light => {},
.dark => {
const settings = c.gtk_settings_get_default();
c.g_object_set(@ptrCast(@alignCast(settings)), "gtk-application-prefer-dark-theme", true, @as([*c]const u8, null));
c.gtk_css_provider_load_from_resource(
provider,
"/com/mitchellh/ghostty/style-dark.css",
@ -234,6 +237,9 @@ pub fn init(core_app: *CoreApp, opts: Options) !App {
.auto, .ghostty => {
const lum = config.background.toTerminalRGB().perceivedLuminance();
if (lum <= 0.5) {
const settings = c.gtk_settings_get_default();
c.g_object_set(@ptrCast(@alignCast(settings)), "gtk-application-prefer-dark-theme", true, @as([*c]const u8, null));
c.gtk_css_provider_load_from_resource(
provider,
"/com/mitchellh/ghostty/style-dark.css",