Add --raw-key-events

This option allows to inject all input keys as key events, and ignore
text events.

Fixes #2816 <https://github.com/Genymobile/scrcpy/issues/2816>

README.md

@@ -833,7 +833,13 @@ scrcpy --prefer-text
 
 (but this will break keyboard behavior in games)
 
-This option has no effect on HID keyboard (all key events are sent as
+On the contrary, you could force to always inject raw key events:
+
+```bash
+scrcpy --raw-key-events
+```
+
+These options have no effect on HID keyboard (all key events are sent as
 scancodes in this mode).
 
 [textevents]: https://blog.rom1v.com/2018/03/introducing-scrcpy/#handle-text-input

app/scrcpy.1

@@ -165,6 +165,10 @@ Set the target directory for pushing files to the device by drag & drop. It is p
 
 Default is "/sdcard/Download/".
 
+.TP
+.B \-\-raw\-key\-events
+Inject key events for all input keys, and ignore text events.
+
 .TP
 .BI "\-r, \-\-record " file
 Record screen to

app/src/cli.c

@@ -51,6 +51,7 @@
 #define OPT_TUNNEL_PORT            1031
 #define OPT_NO_CLIPBOARD_AUTOSYNC  1032
 #define OPT_TCPIP                  1033
+#define OPT_RAW_KEY_EVENTS         1034
 
 struct sc_option {
     char shortopt;
@@ -283,6 +284,11 @@ static const struct sc_option options[] = {
                 "drag & drop. It is passed as is to \"adb push\".\n"
                 "Default is \"/sdcard/Download/\".",
     },
+    {
+        .longopt_id = OPT_RAW_KEY_EVENTS,
+        .longopt = "raw-key-events",
+        .text = "Inject key events for all input keys, and ignore text events."
+    },
     {
         .shortopt = 'r',
         .longopt = "record",
@@ -1351,8 +1357,19 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
                 opts->push_target = optarg;
                 break;
             case OPT_PREFER_TEXT:
+                if (opts->key_inject_mode != SC_KEY_INJECT_MODE_MIXED) {
+                    LOGE("--prefer-text is incompatible with --raw-key-events");
+                    return false;
+                }
                 opts->key_inject_mode = SC_KEY_INJECT_MODE_TEXT;
                 break;
+            case OPT_RAW_KEY_EVENTS:
+                if (opts->key_inject_mode != SC_KEY_INJECT_MODE_MIXED) {
+                    LOGE("--prefer-text is incompatible with --raw-key-events");
+                    return false;
+                }
+                opts->key_inject_mode = SC_KEY_INJECT_MODE_RAW;
+                break;
             case OPT_ROTATION:
                 if (!parse_rotation(optarg, &opts->rotation)) {
                     return false;

app/src/keyboard_inject.c

@@ -101,6 +101,55 @@ convert_keycode(SDL_Keycode from, enum android_keycode *to, uint16_t mod,
         {SDLK_SPACE,     AKEYCODE_SPACE},
     };
 
+    // Numbers and punctuation keys.
+    // Used in raw mode only.
+    static const struct sc_intmap_entry numbers_punct_keys[] = {
+        {SDLK_HASH,          AKEYCODE_POUND},
+        {SDLK_PERCENT,       AKEYCODE_PERIOD},
+        {SDLK_QUOTE,         AKEYCODE_APOSTROPHE},
+        {SDLK_ASTERISK,      AKEYCODE_STAR},
+        {SDLK_PLUS,          AKEYCODE_PLUS},
+        {SDLK_COMMA,         AKEYCODE_COMMA},
+        {SDLK_MINUS,         AKEYCODE_MINUS},
+        {SDLK_PERIOD,        AKEYCODE_PERIOD},
+        {SDLK_SLASH,         AKEYCODE_SLASH},
+        {SDLK_0,             AKEYCODE_0},
+        {SDLK_1,             AKEYCODE_1},
+        {SDLK_2,             AKEYCODE_2},
+        {SDLK_3,             AKEYCODE_3},
+        {SDLK_4,             AKEYCODE_4},
+        {SDLK_5,             AKEYCODE_5},
+        {SDLK_6,             AKEYCODE_6},
+        {SDLK_7,             AKEYCODE_7},
+        {SDLK_8,             AKEYCODE_8},
+        {SDLK_8,             AKEYCODE_9},
+        {SDLK_SEMICOLON,     AKEYCODE_SEMICOLON},
+        {SDLK_EQUALS,        AKEYCODE_EQUALS},
+        {SDLK_AT,            AKEYCODE_AT},
+        {SDLK_LEFTBRACKET,   AKEYCODE_LEFT_BRACKET},
+        {SDLK_BACKSLASH,     AKEYCODE_BACKSLASH},
+        {SDLK_RIGHTBRACKET,  AKEYCODE_RIGHT_BRACKET},
+        {SDLK_BACKQUOTE,     AKEYCODE_GRAVE},
+        {SDLK_KP_1,          AKEYCODE_NUMPAD_1},
+        {SDLK_KP_2,          AKEYCODE_NUMPAD_2},
+        {SDLK_KP_3,          AKEYCODE_NUMPAD_3},
+        {SDLK_KP_4,          AKEYCODE_NUMPAD_4},
+        {SDLK_KP_5,          AKEYCODE_NUMPAD_5},
+        {SDLK_KP_6,          AKEYCODE_NUMPAD_6},
+        {SDLK_KP_7,          AKEYCODE_NUMPAD_7},
+        {SDLK_KP_8,          AKEYCODE_NUMPAD_8},
+        {SDLK_KP_9,          AKEYCODE_NUMPAD_9},
+        {SDLK_KP_0,          AKEYCODE_NUMPAD_0},
+        {SDLK_KP_DIVIDE,     AKEYCODE_NUMPAD_DIVIDE},
+        {SDLK_KP_MULTIPLY,   AKEYCODE_NUMPAD_MULTIPLY},
+        {SDLK_KP_MINUS,      AKEYCODE_NUMPAD_SUBTRACT},
+        {SDLK_KP_PLUS,       AKEYCODE_NUMPAD_ADD},
+        {SDLK_KP_PERIOD,     AKEYCODE_NUMPAD_DOT},
+        {SDLK_KP_EQUALS,     AKEYCODE_NUMPAD_EQUALS},
+        {SDLK_KP_LEFTPAREN,  AKEYCODE_NUMPAD_LEFT_PAREN},
+        {SDLK_KP_RIGHTPAREN, AKEYCODE_NUMPAD_RIGHT_PAREN},
+    };
+
     const struct sc_intmap_entry *entry =
         SC_INTMAP_FIND_ENTRY(special_keys, from);
     if (entry) {
@@ -134,6 +183,14 @@ convert_keycode(SDL_Keycode from, enum android_keycode *to, uint16_t mod,
         return true;
     }
 
+    if (key_inject_mode == SC_KEY_INJECT_MODE_RAW) {
+        entry = SC_INTMAP_FIND_ENTRY(numbers_punct_keys, from);
+        if (entry) {
+            *to = entry->value;
+            return true;
+        }
+    }
+
     return false;
 }
 
@@ -251,6 +308,11 @@ sc_key_processor_process_text(struct sc_key_processor *kp,
                               const SDL_TextInputEvent *event) {
     struct sc_keyboard_inject *ki = DOWNCAST(kp);
 
+    if (ki->key_inject_mode == SC_KEY_INJECT_MODE_RAW) {
+        // Never inject text events
+        return;
+    }
+
     if (ki->key_inject_mode == SC_KEY_INJECT_MODE_MIXED) {
         char c = event->text[0];
         if (isalpha(c) || c == ' ') {

app/src/options.h

@@ -47,6 +47,9 @@ enum sc_key_inject_mode {
     // Inject special keys as key events,
     // inject letters and space, numbers and punctuation as text events.
     SC_KEY_INJECT_MODE_TEXT,
+
+    // Inject everything as key events.
+    SC_KEY_INJECT_MODE_RAW,
 };
 
 #define SC_MAX_SHORTCUT_MODS 8