[gnome-music/wip/cdavis/dark-style-opt-in] defaulticon: Add dark placeholder style

[Christopher Davis <christopherdavis src gnome org>]

commit cd56553c138eb23a7438aacd99376fbb935e952d
Author: Christopher Davis <christopherdavis gnome org>
Date:   Thu Oct 7 03:14:00 2021 -0700

    defaulticon: Add dark placeholder style
    
    This currently only works when the app is
    launched in dark mode.

 gnomemusic/defaulticon.py | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)
---
diff --git a/gnomemusic/defaulticon.py b/gnomemusic/defaulticon.py
index 0ce4da6ff..95def3e62 100644
--- a/gnomemusic/defaulticon.py
+++ b/gnomemusic/defaulticon.py
@@ -27,7 +27,7 @@ from math import pi
 from typing import Dict, Tuple
 
 import cairo
-from gi.repository import Gtk, GObject
+from gi.repository import Gtk, GObject, Gdk, Handy
 
 from gnomemusic.utils import ArtSize
 
@@ -76,10 +76,17 @@ def make_icon_frame(
         ctx.arc(radius, h - radius, radius, 90 * degrees, 180 * degrees)
         ctx.arc(radius, radius, radius, 180 * degrees, 270 * degrees)
 
+    fill_color = Gdk.RGBA(1.0, 1.0, 1.0, 1.0)
+    icon_color = Gdk.RGBA(0.0, 0.0, 0.0, 0.3)
+    if Handy.StyleManager.get_default().props.dark:
+        fill_color = Gdk.RGBA(66.0 / 255, 66.0 / 255, 66.0 / 255, 1.0)
+        icon_color = Gdk.RGBA(1.0, 1.0, 1.0, 1.0)
+
     if default_icon:
-        ctx.set_source_rgb(1, 1, 1)
+        ctx.set_source_rgb(fill_color.red, fill_color.green, fill_color.blue)
         ctx.fill()
-        ctx.set_source_rgba(0, 0, 0, 0.3)
+        ctx.set_source_rgba(icon_color.red, icon_color.green,
+                            icon_color.blue, icon_color.alpha)
         ctx.mask_surface(icon_surface, w / 3, h / 3)
         ctx.fill()
     else: