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

@@ -6,11 +6,11 @@
 
 // clang-format off
 const struct input_event
-syn         = {.type = EV_SYN, .code = SYN_REPORT,   .value = 0},
+syn       = {.type = EV_SYN , .code = SYN_REPORT   , .value = 0},
-esc_up      = {.type = EV_KEY, .code = KEY_ESC,      .value = 0},
+esc_up    = {.type = EV_KEY , .code = KEY_ESC      , .value = 0},
-ctrl_up     = {.type = EV_KEY, .code = KEY_LEFTCTRL, .value = 0},
+ctrl_up   = {.type = EV_KEY , .code = KEY_LEFTCTRL , .value = 0},
-esc_down    = {.type = EV_KEY, .code = KEY_ESC,      .value = 1},
+esc_down  = {.type = EV_KEY , .code = KEY_ESC      , .value = 1},
-ctrl_down   = {.type = EV_KEY, .code = KEY_LEFTCTRL, .value = 1};
+ctrl_down = {.type = EV_KEY , .code = KEY_LEFTCTRL , .value = 1};
 // clang-format on
 
 void print_usage(FILE *stream, const char *program) {
@@ -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)
@@ -71,12 +74,12 @@ int main(int argc, char *argv[]) {
         switch (opt) {
             case 'h':
                 return print_usage(stdout, argv[0]), EXIT_SUCCESS;
-            case 't':
-                delay = atoi(optarg);
-                continue;
             case 'm':
                 mode = atoi(optarg);
                 continue;
+            case 't':
+                delay = atoi(optarg);
+                continue;
         }
 
         return print_usage(stderr, argv[0]), EXIT_FAILURE;
@@ -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)