JS: Add badusb.altPrint() and badusb.altPrintln() to avoid layout issues on Windows targets

applications/system/js_app/examples/apps/Scripts/badusb_demo.js

@@ -26,6 +26,12 @@ if (badusb.isConnected()) {
     badusb.println("Flipper Name: " + flipper.getName());
     badusb.println("Battery level: " + to_string(flipper.getBatteryCharge()) + "%");
 
+    // Alt+Numpad method works only on Windows!!!
+    badusb.altPrintln("This was printed with Alt+Numpad method!");
+
+    // There's also badusb.print() and badusb.altPrint()
+    // which don't add the return at the end
+
     notify.success();
 } else {
     print("USB not connected");

applications/system/js_app/modules/js_badusb.c

@@ -52,6 +52,17 @@ static const struct {
     {"F10", HID_KEYBOARD_F10},
     {"F11", HID_KEYBOARD_F11},
     {"F12", HID_KEYBOARD_F12},
+
+    {"NUM0", HID_KEYPAD_0},
+    {"NUM1", HID_KEYPAD_1},
+    {"NUM2", HID_KEYPAD_2},
+    {"NUM3", HID_KEYPAD_3},
+    {"NUM4", HID_KEYPAD_4},
+    {"NUM5", HID_KEYPAD_5},
+    {"NUM6", HID_KEYPAD_6},
+    {"NUM7", HID_KEYPAD_7},
+    {"NUM8", HID_KEYPAD_8},
+    {"NUM9", HID_KEYPAD_9},
 };
 
 static void js_badusb_quit_free(JsBadusbInst* badusb) {
@@ -314,7 +325,35 @@ static void js_badusb_release(struct mjs* mjs) {
     mjs_return(mjs, MJS_UNDEFINED);
 }
 
-static void badusb_print(struct mjs* mjs, bool ln) {
+// Make sure NUMLOCK is enabled for altchar
+static void ducky_numlock_on() {
+    if((furi_hal_hid_get_led_state() & HID_KB_LED_NUM) == 0) {
+        furi_hal_hid_kb_press(HID_KEYBOARD_LOCK_NUM_LOCK);
+        furi_hal_hid_kb_release(HID_KEYBOARD_LOCK_NUM_LOCK);
+    }
+}
+
+// Simulate pressing a character using ALT+Numpad ASCII code
+static void ducky_altchar(const char* ascii_code) {
+    // Hold the ALT key
+    furi_hal_hid_kb_press(KEY_MOD_LEFT_ALT);
+
+    // Press the corresponding numpad key for each digit of the ASCII code
+    for(size_t i = 0; ascii_code[i] != '\0'; i++) {
+        char digitChar[5] = {'N', 'U', 'M', ascii_code[i], '\0'}; // Construct the numpad key name
+        uint16_t numpad_keycode = get_keycode_by_name(digitChar, strlen(digitChar));
+        if(numpad_keycode == HID_KEYBOARD_NONE) {
+            continue; // Skip if keycode not found
+        }
+        furi_hal_hid_kb_press(numpad_keycode);
+        furi_hal_hid_kb_release(numpad_keycode);
+    }
+
+    // Release the ALT key
+    furi_hal_hid_kb_release(KEY_MOD_LEFT_ALT);
+}
+
+static void badusb_print(struct mjs* mjs, bool ln, bool alt) {
     mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
     JsBadusbInst* badusb = mjs_get_ptr(mjs, obj_inst);
     furi_assert(badusb);
@@ -360,10 +399,20 @@ static void badusb_print(struct mjs* mjs, bool ln) {
         return;
     }
 
+    if(alt) {
+        ducky_numlock_on();
+    }
     for(size_t i = 0; i < text_len; i++) {
-        uint16_t keycode = HID_ASCII_TO_KEY(text_str[i]);
-        furi_hal_hid_kb_press(keycode);
-        furi_hal_hid_kb_release(keycode);
+        if(alt) {
+            // Convert character to ascii numeric value
+            char ascii_str[4];
+            snprintf(ascii_str, sizeof(ascii_str), "%u", (uint8_t)text_str[i]);
+            ducky_altchar(ascii_str);
+        } else {
+            uint16_t keycode = HID_ASCII_TO_KEY(text_str[i]);
+            furi_hal_hid_kb_press(keycode);
+            furi_hal_hid_kb_release(keycode);
+        }
         if(delay_val > 0) {
             bool need_exit = js_delay_with_flags(mjs, delay_val);
             if(need_exit) {
@@ -381,11 +430,19 @@ static void badusb_print(struct mjs* mjs, bool ln) {
 }
 
 static void js_badusb_print(struct mjs* mjs) {
-    badusb_print(mjs, false);
+    badusb_print(mjs, false, false);
 }
 
 static void js_badusb_println(struct mjs* mjs) {
-    badusb_print(mjs, true);
+    badusb_print(mjs, true, false);
+}
+
+static void js_badusb_alt_print(struct mjs* mjs) {
+    badusb_print(mjs, false, true);
+}
+
+static void js_badusb_alt_println(struct mjs* mjs) {
+    badusb_print(mjs, true, true);
 }
 
 static void* js_badusb_create(struct mjs* mjs, mjs_val_t* object) {
@@ -400,6 +457,8 @@ static void* js_badusb_create(struct mjs* mjs, mjs_val_t* object) {
     mjs_set(mjs, badusb_obj, "release", ~0, MJS_MK_FN(js_badusb_release));
     mjs_set(mjs, badusb_obj, "print", ~0, MJS_MK_FN(js_badusb_print));
     mjs_set(mjs, badusb_obj, "println", ~0, MJS_MK_FN(js_badusb_println));
+    mjs_set(mjs, badusb_obj, "altPrint", ~0, MJS_MK_FN(js_badusb_alt_print));
+    mjs_set(mjs, badusb_obj, "altPrintln", ~0, MJS_MK_FN(js_badusb_alt_println));
     *object = badusb_obj;
     return badusb;
 }