[x11] Add possibility to set a user-defined string to detect styluses (#3176)

data/pref.xml

@@ -158,6 +158,7 @@
       <option id="show_menu_bar" type="bool" default="true" />
       <option id="recent_items" type="int" default="16" />
       <option id="osx_async_view" type="bool" default="true" />
+      <option id="x11_stylus_id" type="std::string" />
     </section>
     <section id="undo" text="Undo">
       <option id="size_limit" type="int" default="0" />

laf

@@ -1 +1 @@
-Subproject commit df53f4ac0cecada789bf84b4283947d2591833bd
+Subproject commit 8f9e7892e0da31e423e224b199f53d8ffefce32b

src/app/app.cpp

@@ -71,6 +71,8 @@
 
 #if LAF_MACOS
   #include "os/osx/system.h"
+#elif LAF_LINUX
+  #include "os/x11/system.h"
 #endif
 
 #include <iostream>
@@ -236,6 +238,7 @@ int App::initialize(const AppOptions& options)
   m_coreModules = new CoreModules;
 
 #if LAF_WINDOWS
+
   if (options.disableWintab() ||
       !preferences().experimental.loadWintabDriver() ||
       preferences().tablet.api() == "pointer") {
@@ -245,11 +248,20 @@ int App::initialize(const AppOptions& options)
     system->setTabletAPI(os::TabletAPI::WintabPackets);
   else // preferences().tablet.api() == "wintab"
     system->setTabletAPI(os::TabletAPI::Wintab);
-#endif
 
-#if LAF_MACOS
+#elif LAF_MACOS
+
   if (!preferences().general.osxAsyncView())
     os::osx_set_async_view(false);
+
+#elif LAF_LINUX
+
+  {
+    const std::string& stylusId = preferences().general.x11StylusId();
+    if (!stylusId.empty())
+      os::x11_set_user_defined_string_to_detect_stylus(stylusId);
+  }
+
 #endif
 
   system->setAppName(get_app_name());