[calamares] add windows placement

- will be introduced in 3.2.18

data/branding.desc.d

@@ -29,6 +29,12 @@ windowExpanding:    ${windowexp}
 # in CalamaresUtilsGui, 800x520.
 windowSize: ${windowsize}
 
+# Placement of Calamares window. Either "center" or "free".
+# Whether "center" actually works does depend on the window
+# manager in use (and only makes sense if you're not using
+# *windowExpanding* set to "fullscreen").
+windowPlacement: ${windowplacement}
+
 # These are strings shown to the user in the user interface.
 # There is no provision for translating them -- since they
 # are names, the string is included as-is.

data/manjaro-tools.conf

@@ -80,6 +80,9 @@
 # (possible units: pixel (px) or font-units (em))
 # windowsize="800px,520px"
 
+# placement of Calamares window, either "center" or "free".
+# windowplacement="center"
+
 # colors for text and background components:
 
 # background of the sidebar

lib/util-iso-image.sh

@@ -168,6 +168,12 @@ windowExpanding:    ${windowexp}
 # in CalamaresUtilsGui, 800x520.
 windowSize: ${windowsize}
 
+# Placement of Calamares window. Either "center" or "free".
+# Whether "center" actually works does depend on the window
+# manager in use (and only makes sense if you're not using
+# *windowExpanding* set to "fullscreen").
+windowPlacement: ${windowplacement}
+
 # These are strings shown to the user in the user interface.
 # There is no provision for translating them -- since they
 # are names, the string is included as-is.

lib/util.sh

@@ -343,6 +343,8 @@ init_calamares(){
 	
 	[[ -z ${windowsize} ]] && windowsize="800px,520px"
 
+	[[ -z ${windowplacement} ]] && windowplacement="center"
+	
 	[[ -z ${sidebarbackground} ]] && sidebarbackground=#454948
 	
 	[[ -z ${sidebartext} ]] &&  sidebartext=#efefef