Enable touchpad tap-to-click.

 Ported from Slick Greeter by Mike Gabriel.

 https://github.com/linuxmint/slick-greeter/commit/85f83be9977faf2482d38d2cc289f0542b1c06a4

4 files changed, 55 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
index 730cceb..112eb3e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,6 +11,7 @@ pkglibexec_SCRIPTS = lightdm-arctica-greeter-session \
 	arctica-greeter-guest-session-auto.sh \
 	arctica-greeter-guest-session-setup.sh \
 	arctica-greeter-check-hidpi \
+	arctica-greeter-enable-tap-to-click \
 	arctica-greeter-set-keyboard-layout
 
 EXTRA_DIST = \
diff --git a/arctica-greeter-enable-tap-to-click b/arctica-greeter-enable-tap-to-click
new file mode 100755
index 0000000..105eabe
--- /dev/null
+++ b/arctica-greeter-enable-tap-to-click
@@ -0,0 +1,40 @@
+#!/usr/bin/python3
+
+import sys
+import os
+import syslog
+import subprocess
+import re
+
+if __name__ == '__main__':
+
+    try:
+        output = subprocess.check_output(["xinput", "list"]).decode("UTF-8")
+        for line in output.splitlines():
+            line = line.strip().lower()
+            if "pointer" in line:
+                m = re.search(r'id=(\d+)', line)
+                if m:
+                    if len(m.groups()) > 0:
+                        device_id = m.groups()[0]
+                        syslog.syslog(f"Found xinput pointer: id={device_id}")
+                        props = subprocess.check_output(["xinput", "list-props", device_id]).decode("UTF-8")
+                        for prop in props.splitlines():
+                            prop = prop.strip()
+                            if "Tapping Enabled Default" in prop:
+                                continue
+                            if "Tapping Enabled" in prop:
+                                syslog.syslog("  --> This device has a tap-to-click property")
+                                m = re.search(r'Tapping Enabled \((\d+)\):', prop)
+                                if m:
+                                    if len(m.groups()) > 0:
+                                        prop_id = m.groups()[0]
+                                        syslog.syslog(f"  --> Tapping Enabled property ID: {prop_id}")
+                                        syslog.syslog(f"  --> Calling 'xinput set-prop {device_id} {prop_id} 1'")
+                                        subprocess.check_output(["xinput", "set-prop", device_id, prop_id, "1"])
+
+    except Exception as e:
+        # best effort, syslog it and bail out
+        syslog.syslog("ERROR: %s" % e)
+
+    sys.exit(0)
diff --git a/debian/arctica-greeter.install b/debian/arctica-greeter.install
index 773e2c9..e9aaf72 100644
--- a/debian/arctica-greeter.install
+++ b/debian/arctica-greeter.install
@@ -11,5 +11,6 @@ usr/share/sounds/
 usr/share/xgreeters/
 usr/lib/*/arctica-greeter/lightdm-arctica-greeter-session
 usr/lib/*/arctica-greeter/arctica-greeter-check-hidpi
+usr/lib/*/arctica-greeter/arctica-greeter-enable-tap-to-click
 usr/lib/*/arctica-greeter/arctica-greeter-set-keyboard-layout
 var/lib/polkit-1/localauthority/10-vendor.d/arctica-greeter.pkla
diff --git a/src/arctica-greeter.vala b/src/arctica-greeter.vala
index 89d52b8..e193140 100644
--- a/src/arctica-greeter.vala
+++ b/src/arctica-greeter.vala
@@ -720,6 +720,16 @@ public class ArcticaGreeter : Object
         }
     }
 
+    private static void enable_tap_to_click ()
+    {
+        try {
+            Process.spawn_command_line_sync("/usr/bin/arctica-greeter-enable-tap-to-click", null, null, null);
+        }
+        catch (Error e){
+            warning ("Error while enabling tap-to-click: %s", e.message);
+        }
+    }
+
     private static void activate_numlock ()
     {
         try {
@@ -897,6 +907,9 @@ public class ArcticaGreeter : Object
             }
         }
 
+        /* Enable touchpad tap-to-click */
+        enable_tap_to_click ();
+
         Gtk.init (ref args);
         Ido.init ();