Passthrough mouse events

To not block mice that have keys, which end up grabbed due to generic
configurations that simply filter anything that responds to CAPSLOCK/ESC.

Fixes #15

README.md

@@ -67,29 +67,28 @@ options:
 For more information about the [_Interception Tools_][interception-tools], check
 the project's website.
 
-## Mouse button support
+## Mouse Support
 
-After _Interception Tools_ 0.3, `caps2esc` can work with mouse clicks. An
+After _Interception Tools_ 0.3.1, `caps2esc` can observe for mouse events. An
 example configuration taken from my laptop:
 
 ```yaml
 SHELL: [zsh, -c]
 ---
-- JOB: mux -c caps2esc
-- JOB:
-    - intercept -g $DEVNODE | mux -o caps2esc
-    - mux -i caps2esc | caps2esc | uinput -d $DEVNODE
+- JOB: >
+    mux -c caps2esc;
+    mux -i caps2esc | caps2esc | uinput -d /dev/input/by-path/platform-i8042-serio-0-event-kbd
+- JOB: intercept -g $DEVNODE | mux -o caps2esc
   DEVICE:
     LINK: /dev/input/by-path/platform-i8042-serio-0-event-kbd
-- JOB:
-    - intercept $DEVNODE | mux -o caps2esc
+- JOB: intercept $DEVNODE | mux -o caps2esc
   DEVICE:
     LINK: /dev/input/by-path/platform-i8042-serio-4-event-mouse
 ```
 
 For more information on the topic, check the [_Interception Tools_
 README][interception-tools] about usage of the `mux` tool and device specific
-setups.
+setups, and [this discussion][issue-9-note] for more examples.
 
 ## Installation
 
@@ -156,4 +155,5 @@ Copyright © 2017 Francisco Lopes da Silva
 [x]: https://www.x.org
 [interception]: https://github.com/oblitum/Interception
 [interception-tools]: https://gitlab.com/interception/linux/tools
+[issue-9-note]: https://gitlab.com/interception/linux/plugins/caps2esc/-/issues/9#note_474942893
 [key-repeat-fix]: https://github.com/oblitum/caps2esc/issues/1

caps2esc.c

@@ -21,17 +21,17 @@ void print_usage(FILE *stream, const char *program) {
             "usage: %s [-h] [-m mode] [-t delay]\n"
             "\n"
             "options:\n"
-            "    -h        show this message and exit\n"
-            "    -t        delay used for key sequences (default: 20000 microseconds)\n"
-            "    -m mode   0: default\n"
-            "                 - caps as esc/ctrl\n"
-            "                 - esc as caps\n"
-            "              1: minimal\n"
-            "                 - caps as esc/ctrl\n"
-            "              2: useful on 60%% layouts\n"
-            "                 - caps as esc/ctrl\n"
-            "                 - esc as grave accent\n"
-            "                 - grave accent as caps\n",
+            "    -h         show this message and exit\n"
+            "    -t         delay used for key sequences (default: 20000 microseconds)\n"
+            "    -m mode    0: default\n"
+            "                  - caps as esc/ctrl\n"
+            "                  - esc as caps\n"
+            "               1: minimal\n"
+            "                  - caps as esc/ctrl\n"
+            "               2: useful on 60%% layouts\n"
+            "                  - caps as esc/ctrl\n"
+            "                  - esc as grave accent\n"
+            "                  - grave accent as caps\n",
             program);
     // clang-format on
 }
@@ -46,31 +46,29 @@ 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)
-                event->code = KEY_CAPSLOCK;
-            break;
-        case 2:
-            switch (event->code) {
-                case KEY_ESC:
-                    event->code = KEY_GRAVE;
-                    break;
-                case KEY_GRAVE:
+    if (event->type == EV_KEY)
+        switch (mode) {
+            case 0:
+                if (event->code == KEY_ESC)
                     event->code = KEY_CAPSLOCK;
-                    break;
-            }
-            break;
-    }
+                break;
+            case 2:
+                switch (event->code) {
+                    case KEY_ESC:
+                        event->code = KEY_GRAVE;
+                        break;
+                    case KEY_GRAVE:
+                        event->code = KEY_CAPSLOCK;
+                        break;
+                }
+                break;
+        }
     write_event(event);
 }
 
 int main(int argc, char *argv[]) {
-    int opt, mode = 0, delay = 20000;
-    while ((opt = getopt(argc, argv, "ht:m:")) != -1) {
+    int mode = 0, delay = 20000;
+    for (int opt; (opt = getopt(argc, argv, "ht:m:")) != -1;) {
         switch (opt) {
             case 'h':
                 return print_usage(stdout, argv[0]), EXIT_SUCCESS;