From 3e05c1d4dda93e05aad2ef37900754f77c026d82 Mon Sep 17 00:00:00 2001
From: Simon Ruderich <simon@ruderich.org>
Date: Sun, 4 May 2014 16:59:56 +0200
Subject: [PATCH] enable real transparency in urxvt with compton

---
 Xdefaults.in | 16 ++++++++++++----
 setup.sh     |  7 +++++++
 xinitrc      |  6 ++++++
 3 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/Xdefaults.in b/Xdefaults.in
index 9ecdaae..f2938b4 100644
--- a/Xdefaults.in
+++ b/Xdefaults.in
@@ -5,7 +5,7 @@
 ! "Term" is an alias for all supported terminal emulators; it is automatically
 ! replaced by setup.sh.
 
-! Copyright (C) 2011-2012  Simon Ruderich
+! Copyright (C) 2011-2014  Simon Ruderich
 !
 ! This file is free software: you can redistribute it and/or modify
 ! it under the terms of the GNU General Public License as published by
@@ -26,6 +26,14 @@ Term*foreground:  #cccccc
 Term*background:  #000000
 Term*cursorColor: #ffff66
 
+! Special case for urxvt to get transparent background. This requires a
+! compositing manager which supports transparency like compton. Thanks to eto
+! and adaedra in #herblstuftwm on Freenode (2014-05-04 15:50 ff) for their
+! awesome help regarding transparency.
+Rxvt*background: [90]#000000
+! Necessary for transparency, see man page.
+Rxvt*depth: 32
+
 ! Disable the scrollback buffer. I use screen/tmux so it is not necessary.
 XTerm*saveLines: 0
 Rxvt*saveLines:  0
@@ -41,9 +49,9 @@ XTerm.termName: xterm-256color
 ! #stumpwm on Freenode (2009-05-18 22:05).
 !XTerm*allowSendEvents: true
 
-! Enable transparency.
-Rxvt*transparent: true
-Rxvt*shading:     10
+! Enable pseudo transparency. Only used if compton is not available.
+!NO_COMPTON Rxvt*transparent: true
+!NO_COMPTON Rxvt*shading:     10
 
 ! Do not use any perl extension scripts.
 Rxvt*perl-ext-common:
diff --git a/setup.sh b/setup.sh
index 45a469b..9e330d1 100755
--- a/setup.sh
+++ b/setup.sh
@@ -52,6 +52,13 @@ if installed X; then
          }'
     # Xdefaults uses ! as comment instead of #.
     sed_i 's/^#/!/' Xdefaults
+    # Use urxvt's pseudo-transparency if compton is not available. Better than
+    # nothing.
+    if ! installed compton; then
+        echo 'Xdefaults: no compton found, enabling pseudo-transparency'
+        sed_i 's/^Rxvt\*background/!&/' Xdefaults
+        sed_i 's/^!NO_COMPTON //' Xdefaults
+    fi
 
     if test ! "x`os`" = xdarwin; then
         link xinitrc ~/.xinitrc
diff --git a/xinitrc b/xinitrc
index 387614d..858cbaa 100755
--- a/xinitrc
+++ b/xinitrc
@@ -144,6 +144,12 @@ elif test -n "$screen_lock_force"; then
     error "'xautolock' not found. Auto lock won't work!"
 fi
 
+# Use compton to get transparent windows. See ~/.Xdefaults for configuration
+# of urxvt.
+if installed compton; then
+    compton &
+fi
+
 
 # My window managers doesn't start a terminal emulator on its own, start one
 # when I login.
-- 
2.43.2