Add suinput_emit_combo()

tuomasjjrasanen · tuomasjjrasanen · commit dc6e0f81af93 · 2013-07-04T23:36:25.000+03:00
diff --git a/src/suinput.c b/src/suinput.c
@@ -60,6 +60,35 @@ int suinput_emit_click(const int uinput_fd, const uint16_t key_code)
         return suinput_emit(uinput_fd, EV_KEY, key_code, 0);
 }
 
+int suinput_emit_combo(const int uinput_fd, const uint16_t *const key_codes,
+                       const size_t len)
+{
+        int retval = 0;
+        size_t i;
+
+        for (i = 0; i < len; ++i) {
+                if (suinput_emit(uinput_fd, EV_KEY, key_codes[i], 1) == -1) {
+                        retval = -1;
+                        break; /* The combination or the device is
+                                  somehow broken: there's no sense to
+                                  press any of the rest of the
+                                  keys. It's like pressing physical keys
+                                  one by one and then discovering that
+                                  one of the keys required for this
+                                  combination is missing or broken. */
+                }
+        }
+
+        /* Try to release every pressed key, no matter what. */
+        while (i--) {
+                if (suinput_emit(uinput_fd, EV_KEY, key_codes[i], 0) == -1) {
+                        retval = -1;
+                }
+        }
+
+        return retval;
+}
+
 int suinput_syn(int uinput_fd)
 {
         return suinput_emit(uinput_fd, EV_SYN, SYN_REPORT, 0);
diff --git a/src/suinput.h b/src/suinput.h
@@ -36,6 +36,8 @@ int suinput_emit(int uinput_fd, uint16_t ev_type, uint16_t ev_code,
 
 int suinput_emit_click(int uinput_fd, uint16_t key_code);
 
+int suinput_emit_combo(int uinput_fd, const uint16_t *key_codes, size_t len);
+
 int suinput_syn(int uinput_fd);
 
 int suinput_destroy(int uinput_fd);
