From e59072948b6b98844e1cb690b0605e142b0dd8bc Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 21 Jun 2019 18:00:13 +0200
Subject: dark mode

---
 connect.c  |  2 +-
 domain.c   |  5 +++--
 vconsole.c | 21 +++++++++++++++++++++
 vconsole.h |  1 +
 4 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/connect.c b/connect.c
index 5af71ed..d165535 100644
--- a/connect.c
+++ b/connect.c
@@ -156,7 +156,7 @@ struct vconsole_connect *connect_init(struct vconsole_window *win,
                        NAME_COL,       name,
                        TYPE_COL,       type,
                        URI_COL,        uri,
-                       FOREGROUND_COL, "black",
+                       FOREGROUND_COL, win->darkmode ? "white" : "black",
                        WEIGHT_COL,     PANGO_WEIGHT_NORMAL,
                        -1);
 
diff --git a/domain.c b/domain.c
index c5ead3b..3a1faad 100644
--- a/domain.c
+++ b/domain.c
@@ -326,6 +326,7 @@ static int domain_update_info(struct vconsole_domain *dom, virDomainPtr d)
 static void domain_update_tree_store(struct vconsole_domain *dom,
                                      GtkTreeIter *guest)
 {
+    bool darkmode = dom->conn->win->darkmode;
     const char *foreground;
     char load[16], mem[16];
     PangoWeight weight;
@@ -333,11 +334,11 @@ static void domain_update_tree_store(struct vconsole_domain *dom,
 
     switch (dom->info.state) {
     case VIR_DOMAIN_RUNNING:
-        foreground = "darkgreen";
+        foreground = darkmode ? "lightgreen" : "darkgreen";
         weight = PANGO_WEIGHT_BOLD;
         break;
     default:
-        foreground = "black";
+        foreground = darkmode ? "white" : "black";
         weight = PANGO_WEIGHT_NORMAL;
         break;
     }
diff --git a/vconsole.c b/vconsole.c
index 28e187a..e8c0088 100644
--- a/vconsole.c
+++ b/vconsole.c
@@ -1080,6 +1080,26 @@ static gboolean vconsole_update(gpointer data)
     return TRUE;
 }
 
+static void vconsole_check_darkmode(struct vconsole_window *win)
+{
+    GtkStyle *style;
+    gint fg, bg;
+
+    style = gtk_widget_get_style(GTK_WIDGET(win->tree));
+    fg = (style->text[GTK_STATE_NORMAL].red * 3 +
+          style->text[GTK_STATE_NORMAL].green * 6 +
+          style->text[GTK_STATE_NORMAL].blue);
+    bg = (style->bg[GTK_STATE_NORMAL].red * 3 +
+          style->bg[GTK_STATE_NORMAL].green * 6 +
+          style->bg[GTK_STATE_NORMAL].blue);
+    if (fg > bg)
+        win->darkmode = true;
+#if 0
+    fprintf(stderr, "%s: fg %d, bg %d, darkmode %s\n",
+            __func__, fg, bg, win->darkmode ? "yes" : "no");
+#endif
+}
+
 /* ------------------------------------------------------------------ */
 
 static void usage(FILE *fp)
@@ -1142,6 +1162,7 @@ main(int argc, char *argv[])
     vconsole_tab_list_create(win);
     gtk_widget_show_all(win->toplevel);
     gtk_widget_grab_focus(win->notebook);
+    vconsole_check_darkmode(win);
 
     if (uri)
         connect_init(win, uri);
diff --git a/vconsole.h b/vconsole.h
index e01f372..17fabb2 100644
--- a/vconsole.h
+++ b/vconsole.h
@@ -70,6 +70,7 @@ struct vconsole_window {
     char                      *tty_fg;
     char                      *tty_bg;
     gboolean                  vm_logging;
+    gboolean                  darkmode;
 };
 
 extern int debug;
-- 
cgit