From 0c8326646a9ef1bd6ac82409ff1796f961e771c3 Mon Sep 17 00:00:00 2001
From: Francisco Lopes <francisco@nosubstance.me>
Date: Tue, 29 Dec 2020 02:37:27 -0300
Subject: [PATCH] Expand mouse support

Until now mouse support existed just as side effect of muxing and that
mouse clicks are registered as key events. This expands the support for
mouse wheel and movement.
---
 caps2esc.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/caps2esc.c b/caps2esc.c
index d54b613..28bc383 100644
--- a/caps2esc.c
+++ b/caps2esc.c
@@ -46,6 +46,9 @@ void write_event(const struct input_event *event) {
 }
 
 void write_event_with_mode(struct input_event *event, int mode) {
+    if (event->type == EV_REL || event->type == EV_ABS)
+        return;
+
     switch (mode) {
         case 0:
             if (event->code == KEY_ESC)
@@ -91,20 +94,22 @@ int main(int argc, char *argv[]) {
         if (input.type == EV_MSC && input.code == MSC_SCAN)
             continue;
 
-        if (input.type != EV_KEY) {
+        if (input.type != EV_KEY && input.type != EV_REL &&
+            input.type != EV_ABS) {
             write_event(&input);
             continue;
         }
 
         switch (state) {
             case START:
-                if (input.code == KEY_CAPSLOCK && input.value)
+                if (input.type == EV_KEY && input.code == KEY_CAPSLOCK &&
+                    input.value)
                     state = CAPSLOCK_HELD;
                 else
                     write_event_with_mode(&input, mode);
                 break;
             case CAPSLOCK_HELD:
-                if (input.code == KEY_CAPSLOCK) {
+                if (input.type == EV_KEY && input.code == KEY_CAPSLOCK) {
                     if (input.value == 0) {
                         write_event(&esc_down);
                         write_event(&syn);
@@ -112,7 +117,8 @@ int main(int argc, char *argv[]) {
                         write_event(&esc_up);
                         state = START;
                     }
-                } else if (input.value == 1) {
+                } else if ((input.type == EV_KEY && input.value == 1) ||
+                           input.type == EV_REL || input.type == EV_ABS) {
                     write_event(&ctrl_down);
                     write_event(&syn);
                     usleep(delay);
@@ -122,7 +128,7 @@ int main(int argc, char *argv[]) {
                     write_event_with_mode(&input, mode);
                 break;
             case CAPSLOCK_IS_CTRL:
-                if (input.code == KEY_CAPSLOCK) {
+                if (input.type == EV_KEY && input.code == KEY_CAPSLOCK) {
                     input.code = KEY_LEFTCTRL;
                     write_event(&input);
                     if (input.value == 0)