Toggle "raw key events" via shortcut

The "raw key events" mode may need to be toggled while scrcpy is
running (e.g. to type text then play a game).

Remove the command-line argument and bind Ctrl+k to toggle the mode.

README.md

@@ -312,19 +312,6 @@ To show physical touches while scrcpy is running:
 scrcpy -t
 ```
 
-For playing games, it may be useful to enable "raw key events" (see [#87] and
-[#127]):
-
-```bash
-scrcpy -k
-```
-
-Note that in this mode, text inputs may not work as expected. As a workaround,
-it is still possible to send text using copy-paste.
-
-[#87]: https://github.com/Genymobile/scrcpy/issues/87
-[#127]: https://github.com/Genymobile/scrcpy/issues/127
-
 To run without installing:
 
 ```bash
@@ -351,12 +338,15 @@ To run without installing:
  | turn screen on                         | _Right-click²_                |
  | paste computer clipboard to device     | `Ctrl`+`v`                    |
  | enable/disable FPS counter (on stdout) | `Ctrl`+`i`                    |
+ | toggle "raw key events" mode ([#87])   | `Ctrl`+`k`                    |
  | install APK from computer              | drag & drop APK file          |
  | push file to `/sdcard/`                | drag & drop non-APK file      |
 
 _¹Double-click on black borders to remove them._  
 _²Right-click turns the screen on if it was off, presses BACK otherwise._
 
+[#87]: https://github.com/Genymobile/scrcpy/issues/87
+
 
 ## Why _scrcpy_?
 

app/src/input_manager.c

@@ -220,6 +220,13 @@ void input_manager_process_key(struct input_manager *input_manager,
                     switch_fps_counter_state(input_manager->frames);
                 }
                 return;
+            case SDLK_k:
+                if (!repeat && event->type == SDL_KEYDOWN) {
+                    input_manager->raw_key_events ^= SDL_TRUE; // toggle
+                    LOGI("Raw key events mode %s",
+                         input_manager->raw_key_events ? "enabled" : "disabled");
+                }
+                return;
         }
 
         return;

app/src/main.c

@@ -14,7 +14,6 @@ struct args {
     SDL_bool help;
     SDL_bool version;
     SDL_bool show_touches;
-    SDL_bool raw_key_events;
     Uint16 port;
     Uint16 max_size;
     Uint32 bit_rate;
@@ -37,11 +36,6 @@ static void usage(const char *arg0) {
         "        (typically, portrait for a phone, landscape for a tablet).\n"
         "        Any --max-size value is computed on the cropped size.\n"
         "\n"
-        "    -k, --raw-key-events\n"
-        "        Send key events even for text keys, and ignore text input\n"
-        "        events. This is useful when text keys are not used for\n"
-        "        typing text, for example in video games.\n"
-        "\n"
         "    -h, --help\n"
         "        Print this help.\n"
         "\n"
@@ -206,7 +200,6 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
     static const struct option long_options[] = {
         {"bit-rate",     required_argument, NULL, 'b'},
         {"crop",         required_argument, NULL, 'c'},
-        {"raw-key-events", no_argument,       NULL, 'k'},
         {"help",         no_argument,       NULL, 'h'},
         {"max-size",     required_argument, NULL, 'm'},
         {"port",         required_argument, NULL, 'p'},
@@ -216,7 +209,7 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
         {NULL,           0,                 NULL, 0  },
     };
     int c;
-    while ((c = getopt_long(argc, argv, "b:c:khm:p:s:tv", long_options, NULL)) != -1) {
+    while ((c = getopt_long(argc, argv, "b:c:hm:p:s:tv", long_options, NULL)) != -1) {
         switch (c) {
             case 'b':
                 if (!parse_bit_rate(optarg, &args->bit_rate)) {
@@ -226,9 +219,6 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
             case 'c':
                 args->crop = optarg;
                 break;
-            case 'k':
-                args->raw_key_events = SDL_TRUE;
-                break;
             case 'h':
                 args->help = SDL_TRUE;
                 break;
@@ -278,7 +268,6 @@ int main(int argc, char *argv[]) {
         .help = SDL_FALSE,
         .version = SDL_FALSE,
         .show_touches = SDL_FALSE,
-        .raw_key_events = SDL_FALSE,
         .port = DEFAULT_LOCAL_PORT,
         .max_size = DEFAULT_MAX_SIZE,
         .bit_rate = DEFAULT_BIT_RATE,
@@ -316,7 +305,6 @@ int main(int argc, char *argv[]) {
         .max_size = args.max_size,
         .bit_rate = args.bit_rate,
         .show_touches = args.show_touches,
-        .raw_key_events = args.raw_key_events,
     };
     int res = scrcpy(&options) ? 0 : 1;
 

app/src/scrcpy.c

@@ -35,6 +35,7 @@ static struct input_manager input_manager = {
     .controller = &controller,
     .frames = &frames,
     .screen = &screen,
+    .raw_key_events = SDL_FALSE,
 };
 
 #if defined(__APPLE__) || defined(__WINDOWS__)
@@ -223,12 +224,6 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
         show_touches_waited = SDL_TRUE;
     }
 
-    // configure the "raw key events" flag on the input manager
-    input_manager.raw_key_events = options->raw_key_events;
-    if (options->raw_key_events) {
-        LOGI("Raw key events mode enabled");
-    }
-
     ret = event_loop();
     LOGD("quit...");
 

app/src/scrcpy.h

@@ -10,7 +10,6 @@ struct scrcpy_options {
     Uint16 max_size;
     Uint32 bit_rate;
     SDL_bool show_touches;
-    SDL_bool raw_key_events; // ignore text input, forward key events instead
 };
 
 SDL_bool scrcpy(const struct scrcpy_options *options);