#2762 try to match the theme colors

git-svn-id: https://xpra.org/svn/Xpra/trunk@26477 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/client/gtk3/gtk3_client_window.py

@@ -11,7 +11,7 @@
 from xpra.client.gtk3.window_menu import WindowMenuHelper
 from xpra.gtk_common.gtk_util import WINDOW_NAME_TO_HINT, scaled_image
 from xpra.util import envbool
-from xpra.os_util import bytestostr, is_gnome, OSX
+from xpra.os_util import bytestostr, is_gnome, OSX, WIN32
 from xpra.log import Logger
 
 paintlog = Logger("paint")
@@ -97,6 +97,10 @@ def add_header_bar(self):
             button.connect("clicked", self.show_xpra_menu)
             hb.pack_end(button)
         self.set_titlebar(hb)
+        if WIN32:
+            from xpra.platform.win32.dwm_color import match_window_color
+            match_window_color()
+
 
     def show_xpra_menu(self, *_args):
         mh = getattr(self._client, "menu_helper", None)

src/xpra/platform/win32/dwm_color.py

@@ -0,0 +1,118 @@
+# This file is part of Xpra.
+# Copyright (C) 2020 Antoine Martin <[email protected]>
+# Xpra is released under the terms of the GNU GPL v2, or, at your option, any
+# later version. See the file COPYING for details.
+
+from ctypes import WinDLL, windll, c_int, byref, Structure, POINTER
+from ctypes.wintypes import DWORD, PDWORD, PBOOL, BOOL, UINT
+
+from gi.repository import Gdk, Gtk
+
+from xpra.log import Logger
+
+log = Logger("win32")
+log.enable_debug()
+
+
+COLORREF = DWORD        #0x00bbggrr
+
+class COLORIZATIONPARAMS(Structure):
+    _fields_ = (
+        ('Color',                       COLORREF),
+        ('Afterglow',                   COLORREF),
+        ('ColorBalance',                UINT),
+        ('AfterglowBalance',            UINT),
+        ('BlurBalance',                 UINT),
+        ('GlassReflectionIntensity',    UINT),
+        ('Opaque',                      BOOL),
+        )
+PCOLORIZATIONPARAMS = POINTER(COLORIZATIONPARAMS)
+
+try:
+    DwmGetColorizationParameters = windll.dwmapi[127]
+except Exception:
+    DwmGetColorizationParameters = None
+else:
+    DwmGetColorizationParameters.argyptes = [PCOLORIZATIONPARAMS]
+    DwmGetColorizationParameters.restype = c_int
+
+def rgba(c):
+    r, g, b = (c >> 16) & 0xFF, (c >> 8) & 0xFF, c & 0xFF
+    a = (c >> 24) & 0xff
+    return (r, g, b, a)
+
+def get_frame_color():
+    params = COLORIZATIONPARAMS()
+    r = DwmGetColorizationParameters(byref(params))
+    log("DwmGetColorizationParameters(..)=%i", r)
+    if r:
+        return None
+    return params.Color
+
+def get_colorization_color():
+    dwmapi = WinDLL("dwmapi", use_last_error=True)
+    DwmGetColorizationColor = dwmapi.DwmGetColorizationColor
+    DwmGetColorizationColor.restype = c_int
+    DwmGetColorizationColor.argtypes = [PDWORD, PBOOL]
+    color = DWORD()
+    opaque = BOOL()
+    r = DwmGetColorizationColor(byref(color), byref(opaque))
+    log("DwmGetColorizationColor(..)=%i", r)
+    if r:
+        return None
+    return color.value
+
+
+def match_window_color():
+    color = get_frame_color() or get_colorization_color()
+    if not color:
+        return
+    r, g, b, a = rgba(color)
+    log("rgba(%#x)=%s", color, (r, g, b, a))
+    #color_str = "#"+hex(c)[-6:]
+    #color should be: 10893e
+    color_str = "rgba(%i, %i, %i, %.2f)" % (r, g, b, a/255)
+    if min(r, g, b)<128:
+        title_color_str = "white"
+    else:
+        title_color_str = "black"
+    if max(abs(0x99-c) for c in (r, g, b))>64:
+        title_unfocused_color_str = "#999999"
+    else:
+        title_unfocused_color_str = "#333333"
+    if max(abs(0xff-c) for c in (r, g, b))>64:
+        unfocused_color_str = "white"
+    else:
+        unfocused_color_str = "#666666"
+    style_provider = Gtk.CssProvider()
+    css_data = """
+.titlebar {
+ background-color: %s;
+ background-image: none;
+}
+headerbar .title {
+ color : %s;
+}
+headerbar .titlebutton {
+ color: %s;
+}
+.titlebar:backdrop {
+ background-color: %s;
+}
+.titlebar:backdrop .title {
+ color : %s;
+}
+headerbar:backdrop .titlebutton {
+ color: %s;
+}
+""" % (
+ color_str, title_color_str, title_color_str,
+ unfocused_color_str, title_unfocused_color_str, title_unfocused_color_str,
+)
+    log("match_window_color() css=%r", css_data)
+    style_provider.load_from_data(css_data.encode("latin1"))
+    Gtk.StyleContext.add_provider_for_screen(
+        Gdk.Screen.get_default(),
+        style_provider,
+        Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION+1
+        )