Patch of syndaemon (ftp://www.x.org/pub/X11R7.5/doc/man/man1/syndaemon.1.html) to ignore arrow keys

1412-Add_ignore_arrow_option.patch

From a7189b6da6fc320eaf9ccac4511081a5a6977750 Mon Sep 17 00:00:00 2001
From: Hernawan Fa'iz Abdillah <[email protected]>
Date: Sat, 27 Dec 2014 22:43:24 +0700
Subject: [PATCH] Add a capability for ignoring arrow keys. Cause, in some
 case, using arrow keys are not considered typing.

---
 tools/syndaemon.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/tools/syndaemon.c b/tools/syndaemon.c
index 29e75f5..1f7c8ae 100644
--- a/tools/syndaemon.c
+++ b/tools/syndaemon.c
@@ -57,6 +57,7 @@ static Bool pad_disabled
     /* internal flag, this does not correspond to device state */ ;
 static int ignore_modifier_combos;
 static int ignore_modifier_keys;
+static int ignore_arrow_keys;
 static int background;
 static const char *pid_file;
 static Display *display;
@@ -86,6 +87,8 @@ usage(void)
     fprintf(stderr,
             "  -k Ignore modifier keys when monitoring keyboard activity.\n");
     fprintf(stderr, "  -K Like -k but also ignore Modifier+Key combos.\n");
+    fprintf(stderr,
+            "  -a Ignore arrow keys when monitoring keyboard activity.\n");
     fprintf(stderr, "  -R Use the XRecord extension.\n");
     fprintf(stderr, "  -v Print diagnostic messages.\n");
     fprintf(stderr, "  -? Show this help message.\n");
@@ -210,6 +213,7 @@ keyboard_activity(Display * display)
     }
     for (i = 0; i < KEYMAP_SIZE; i++)
         old_key_state[i] = key_state[i];
+
     return ret;
 }
 
@@ -261,7 +265,8 @@ clear_bit(unsigned char *ptr, int bit)
 }
 
 static void
-setup_keyboard_mask(Display * display, int ignore_modifier_keys)
+setup_keyboard_mask(Display * display, int ignore_modifier_keys, 
+                    int ignore_arrow_keys)
 {
     XModifierKeymap *modifiers;
     int i;
@@ -279,6 +284,13 @@ setup_keyboard_mask(Display * display, int ignore_modifier_keys)
         }
         XFreeModifiermap(modifiers);
     }
+
+    if (ignore_arrow_keys) {
+	// Up(128)
+	keyboard_mask[13] &= ~0b10000000;
+	// Left(16) - Down(4) - Right(2)
+	keyboard_mask[14] &= ~(0b00010000 | 0b00000100 | 0b00000010);
+    }
 }
 
 /* ---- the following code is for using the xrecord extension ----- */
@@ -547,8 +559,11 @@ main(int argc, char *argv[])
     int use_xrecord = 0;
 
     /* Parse command line parameters */
-    while ((c = getopt(argc, argv, "i:m:dtp:kKR?v")) != EOF) {
+    while ((c = getopt(argc, argv, "ai:m:dtp:kKR?v")) != EOF) {
         switch (c) {
+        case 'a':
+            ignore_arrow_keys = 1;
+            break;
         case 'i':
             idle_time = atof(optarg);
             break;
@@ -641,7 +656,7 @@ main(int argc, char *argv[])
     else
 #endif                          /* HAVE_X11_EXTENSIONS_RECORD_H */
     {
-        setup_keyboard_mask(display, ignore_modifier_keys);
+        setup_keyboard_mask(display, ignore_modifier_keys, ignore_arrow_keys);
 
         /* Run the main loop */
         main_loop(display, idle_time, poll_delay);
-- 
2.4.0