feat(icons): Add colorblind-friendly icons variants (#511)

Add the `ColorblindMode` option in the `arch-update.conf` configuration file to change the systray applet icon update variants to a colorblind-friendly yellow.

Closes #510

---------

Co-authored-by: Robin Candau <robincandau@protonmail.com>

Author: s-pappous

doc/man/arch-update.conf.5.scd

@@ -61,6 +61,9 @@ Options are case sensitive, so capital letters have to be respected.
 *TrayIconStyle=[Style / Color]*
 	Style to be used for the systray applet icon. Valid values are the available style / color variants for the icon set, listed in https://github.com/Antiz96/arch-update/blob/main/res/icons/README.md. Defaults to "blue".
 
+*ColorblindMode*
+	Change systray applet icon update variants to a colorblind-friendly yellow.
+
 # SEE ALSO
 
 *arch-update*(1)

doc/man/fr/arch-update.conf.5.scd

@@ -61,6 +61,9 @@ Les options sont sensibles à la casse, les majuscules doivent donc être respec
 *TrayIconStyle=[Style / Couleur]*
 	Style à utiliser pour l'icône de l'applet systray. Les valeurs valides sont les variantes de style / couleur disponibles pour le set d'icône, listées ici : https://github.com/Antiz96/arch-update/blob/main/res/icons/README.md. La valeur par défaut est "blue".
 
+*ColorblindMode*
+	Changer la variante de l'icône de l'applet systray pour utiliser une couleur jaune lorsque des mises à jour sont disponibles, afin d'être plus facilement distinguable pour les daltoniens.
+
 # VOIR AUSSI
 
 *arch-update*(1)

res/config/arch-update.conf.example

@@ -15,3 +15,4 @@
 #KeepUninstalledPackages=0
 #DiffProg=$DIFFPROG
 #TrayIconStyle=blue
+#ColorblindMode

res/icons/README.md

@@ -1,7 +1,7 @@
 # Icon Style / Color
 
 Here is the list of available style / color for the systray icon.  
-You can select which style / color to use with the `TrayIconStyle` option in the `arch-update.conf` configuration file (see the [arch-update.conf(5) man page](https://github.com/Antiz96/arch-update/blob/main/doc/man/arch-update.conf.5.scd) for more details).
+You can select which style / color to use with the `TrayIconStyle` option in the `arch-update.conf` configuration file, as well as toggle colorblind mode with the `ColorblindMode` option (see the [arch-update.conf(5) man page](https://github.com/Antiz96/arch-update/blob/main/doc/man/arch-update.conf.5.scd) for more details).
 
 ## blue (default one)
 
@@ -17,6 +17,12 @@ You can select which style / color to use with the `TrayIconStyle` option in the
   <img width="200" height="200" src="arch-update_updates-available-blue.svg">
 </p>
 
+- Updates available in colorblind mode:
+
+<p align="center">
+  <img width="200" height="200" src="arch-update_updates-available-blue-cb.svg">
+</p>
+
 ## light
 
 - Up to date:
@@ -31,6 +37,12 @@ You can select which style / color to use with the `TrayIconStyle` option in the
   <img width="200" height="200" src="arch-update_updates-available-light.svg">
 </p>
 
+- Updates available in colorblind mode:
+
+<p align="center">
+  <img width="200" height="200" src="arch-update_updates-available-light-cb.svg">
+</p>
+
 ## dark
 
 - Up to date:
@@ -44,3 +56,9 @@ You can select which style / color to use with the `TrayIconStyle` option in the
 <p align="center">
   <img width="200" height="200" src="arch-update_updates-available-dark.svg">
 </p>
+
+- Updates available in colorblind mode:
+
+<p align="center">
+  <img width="200" height="200" src="arch-update_updates-available-dark-cb.svg">
+</p>

res/icons/arch-update_updates-available-blue-cb.svg

@@ -106,6 +106,7 @@ if [ -n "${update_available}" ]; then
 				--setenv=_name="${_name}" \
 				--setenv=name="${name}" \
 				--setenv=tray_icon_style="${tray_icon_style}" \
+				--setenv=colorblind_mode="${colorblind_mode}" \
 				--setenv=tmpdir="${tmpdir}" \
 				--setenv=desktop_file="${desktop_file}" \
 			 "${libdir}/notification.sh"

res/icons/arch-update_updates-available-dark-cb.svg

@@ -202,7 +202,7 @@ icon_up-to-date() {
 # Definition of the icon_updates-available function: Change tray icon to "updates available"
 icon_updates-available() {
 	# shellcheck disable=SC2154
-	echo "${name}_updates-available-${tray_icon_style}" > "${statedir}/tray_icon"
+	echo "${name}_updates-available-${tray_icon_style}${colorblind_mode}" > "${statedir}/tray_icon"
 }
 
 # Definition of commands to always run on exit (e.g. cleanup of files / dirs which have no purpose being kept)

res/icons/arch-update_updates-available-light-cb.svg

@@ -61,6 +61,10 @@ if [ -f "${config_file}" ]; then
 	# Check the "TrayIconStyle" option in arch-update.conf
 	# shellcheck disable=SC2034
 	tray_icon_style=$(grep -E '^[[:space:]]*TrayIconStyle[[:space:]]*=[[:space:]]*(blue|light|dark)[[:space:]]*$' "${config_file}" 2> /dev/null | awk -F '=' '{print $2}' | tr -d '[:space:]')
+
+	# Check the "ColorblindMode" option in arch-update.conf
+	# shellcheck disable=SC2034
+	colorblind_mode=$(grep -Eq '^[[:space:]]*ColorblindMode[[:space:]]*$' "${config_file}" 2> /dev/null && echo "-cb")
 fi
 
 # Set the default / fallback value for options that require it (if the arch-update.conf configuration file doesn't exists, if the concerned option is commented or if the set value is invalid)