themes: Add `ruled.notification` to all themes.

The rational behind this is that adding more and more `beautiful`
variables doesn't scale. While not everybody is on board with this,
I think we should move more logic into the theme to put an end to
the unscalable complexity plagging some modules (such as the
tasklist).

Instead of adding a variable for the background and foreground color
of urgent notification, we can now use the rules.

themes/default/theme.lua

@@ -4,6 +4,7 @@
 
 local theme_assets = require("beautiful.theme_assets")
 local xresources = require("beautiful.xresources")
+local rnotification = require("ruled.notification")
 local dpi = xresources.apply_dpi
 
 local gfs = require("gears.filesystem")
@@ -126,6 +127,14 @@ theme.awesome_icon = theme_assets.awesome_icon(
 -- from /usr/share/icons and /usr/share/icons/hicolor will be used.
 theme.icon_theme = nil
 
+-- Set different colors for urgent notifications.
+rnotification.connect_signal('request::rules', function()
+    rnotification.append_rule {
+        rule       = { urgency = 'critical' },
+        properties = { bg = '#ff0000', fg = '#ffffff' }
+    }
+end)
+
 return theme
 
 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

themes/gtk/theme.lua

@@ -5,6 +5,7 @@
 
 local theme_assets = require("beautiful.theme_assets")
 local dpi = require("beautiful.xresources").apply_dpi
+local rnotification = require("ruled.notification")
 local gfs = require("gears.filesystem")
 local themes_path = gfs.get_themes_dir()
 local gears_shape = require("gears.shape")
@@ -345,6 +346,14 @@ theme.wallpaper = function(s)
     return theme_assets.wallpaper(wallpaper_bg, wallpaper_fg, wallpaper_alt_fg, s)
 end
 
+-- Set different colors for urgent notifications.
+rnotification.connect_signal('request::rules', function()
+    rnotification.append_rule {
+        rule       = { urgency = 'critical' },
+        properties = { bg = '#ff0000', fg = '#ffffff' }
+    }
+end)
+
 return theme
 
 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80:foldmethod=marker

themes/sky/theme.lua

@@ -6,6 +6,7 @@
 
 local theme_assets = require("beautiful.theme_assets")
 local xresources = require("beautiful.xresources")
+local rnotification = require("ruled.notification")
 local dpi = xresources.apply_dpi
 local themes_path = require("gears.filesystem").get_themes_dir()
 
@@ -97,6 +98,15 @@ theme.titlebar_maximized_button_focus_inactive = themes_path .. "default/titleba
 theme.titlebar_maximized_button_normal_active = themes_path .. "default/titlebar/maximized_normal_active.png"
 theme.titlebar_maximized_button_focus_active = themes_path .. "default/titlebar/maximized_focus_active.png"
 
+
+-- Set different colors for urgent notifications.
+rnotification.connect_signal('request::rules', function()
+    rnotification.append_rule {
+        rule       = { urgency = 'critical' },
+        properties = { bg = '#ff0000', fg = '#ffffff' }
+    }
+end)
+
 return theme
 
 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

themes/xresources/theme.lua

@@ -5,6 +5,7 @@
 
 local theme_assets = require("beautiful.theme_assets")
 local xresources = require("beautiful.xresources")
+local rnotification = require("ruled.notification")
 local dpi = xresources.apply_dpi
 local xrdb = xresources.get_current_theme()
 local gfs = require("gears.filesystem")
@@ -129,6 +130,14 @@ theme.wallpaper = function(s)
     return theme_assets.wallpaper(wallpaper_bg, wallpaper_fg, wallpaper_alt_fg, s)
 end
 
+-- Set different colors for urgent notifications.
+rnotification.connect_signal('request::rules', function()
+    rnotification.append_rule {
+        rule       = { urgency = 'critical' },
+        properties = { bg = '#ff0000', fg = '#ffffff' }
+    }
+end)
+
 return theme
 
 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

themes/zenburn/theme.lua

@@ -4,6 +4,7 @@
 -------------------------------
 
 local themes_path = require("gears.filesystem").get_themes_dir()
+local rnotification = require("ruled.notification")
 local dpi = require("beautiful.xresources").apply_dpi
 
 -- {{{ Main
@@ -131,6 +132,14 @@ theme.titlebar_maximized_button_normal_inactive = themes_path .. "zenburn/titleb
 -- }}}
 -- }}}
 
+-- Set different colors for urgent notifications.
+rnotification.connect_signal('request::rules', function()
+    rnotification.append_rule {
+        rule       = { urgency = 'critical' },
+        properties = { bg = '#ff0000', fg = '#ffffff' }
+    }
+end)
+
 return theme
 
 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80