switch: add software keyboard support (#49)

src/joystick/switch/SDL_sysjoystick.c

@@ -156,7 +156,7 @@ SWITCH_JoystickUpdate(SDL_Joystick *joystick)
     static JoystickState pad_old[JOYSTICK_COUNT];
 
     int index = (int) SDL_JoystickInstanceID(joystick);
-    if (index > JOYSTICK_COUNT) {
+    if (index > JOYSTICK_COUNT || SDL_IsTextInputActive()) {
         return;
     }
 

src/video/switch/SDL_switchswkb.c

@@ -0,0 +1,111 @@
+//
+// Created by cpasjuste on 22/04/2020.
+//
+
+#include "../../SDL_internal.h"
+
+#if SDL_VIDEO_DRIVER_SWITCH
+
+#include <switch.h>
+#include "SDL_switchswkb.h"
+
+static SwkbdInline kbd;
+static SwkbdAppearArg kbdAppearArg;
+static bool kbdInited = SDL_FALSE;
+static bool kbdShown = SDL_FALSE;
+
+void
+SWITCH_InitSwkb()
+{
+}
+
+void
+SWITCH_PollSwkb(void)
+{
+    if(kbdInited) {
+        if(kbdShown) {
+            swkbdInlineUpdate(&kbd, NULL);
+        } else if(SDL_IsTextInputActive()) {
+            SDL_StopTextInput();
+        }
+    }
+}
+
+void
+SWITCH_QuitSwkb()
+{
+    if(kbdInited) {
+        swkbdInlineClose(&kbd);
+        kbdInited = false;
+    }
+}
+
+SDL_bool
+SWITCH_HasScreenKeyboardSupport(_THIS)
+{
+    return SDL_TRUE;
+}
+
+SDL_bool
+SWITCH_IsScreenKeyboardShown(_THIS, SDL_Window *window)
+{
+    return kbdShown;
+}
+
+static void
+SWITCH_EnterCb(const char *str, SwkbdDecidedEnterArg* arg)
+{
+    if(arg->stringLen > 0) {
+        SDL_SendKeyboardText(str);
+    }
+
+    kbdShown = false;
+}
+
+static void
+SWITCH_CancelCb(void)
+{
+    SDL_StopTextInput();
+}
+
+void
+SWITCH_StartTextInput(_THIS)
+{
+    Result rc;
+
+    if(!kbdInited) {
+        rc = swkbdInlineCreate(&kbd);
+        if (R_SUCCEEDED(rc)) {
+            rc = swkbdInlineLaunchForLibraryApplet(&kbd, SwkbdInlineMode_AppletDisplay, 0);
+            if(R_SUCCEEDED(rc)) {
+                swkbdInlineSetDecidedEnterCallback(&kbd, SWITCH_EnterCb);
+                swkbdInlineSetDecidedCancelCallback(&kbd, SWITCH_CancelCb);
+                swkbdInlineMakeAppearArg(&kbdAppearArg, SwkbdType_Normal);
+                swkbdInlineAppearArgSetOkButtonText(&kbdAppearArg, "Submit");
+                kbdAppearArg.dicFlag = 1;
+                kbdAppearArg.returnButtonFlag = 1;
+                kbdInited = true;
+            }
+        }
+    }
+
+    if(kbdInited) {
+        swkbdInlineSetInputText(&kbd, "");
+        swkbdInlineSetCursorPos(&kbd, 0);
+        swkbdInlineUpdate(&kbd, NULL);
+        swkbdInlineAppear(&kbd, &kbdAppearArg);
+        kbdShown = true;
+    }
+}
+
+void
+SWITCH_StopTextInput(_THIS)
+{
+    if(kbdInited) {
+        swkbdInlineDisappear(&kbd);
+    }
+
+    kbdShown = false;
+}
+
+#endif

src/video/switch/SDL_switchswkb.h

@@ -0,0 +1,20 @@
+//
+// Created by cpasjuste on 22/04/2020.
+//
+
+#ifndef SDL2_SDL_SWITCHSWKB_H
+#define SDL2_SDL_SWITCHSWKB_H
+
+#include "../../events/SDL_events_c.h"
+
+extern void SWITCH_InitSwkb();
+extern void SWITCH_PollSwkb();
+extern void SWITCH_QuitSwkb();
+
+extern SDL_bool SWITCH_HasScreenKeyboardSupport(_THIS);
+extern SDL_bool SWITCH_IsScreenKeyboardShown(_THIS, SDL_Window * window);
+
+extern void SWITCH_StartTextInput(_THIS);
+extern void SWITCH_StopTextInput(_THIS);
+
+#endif //SDL2_SDL_SWITCHSWKB_H

src/video/switch/SDL_switchvideo.c

@@ -34,6 +34,7 @@
 #include "SDL_switchtouch.h"
 #include "SDL_switchkeyboard.h"
 #include "SDL_switchmouse_c.h"
+#include "SDL_switchswkb.h"
 
 /* Currently only one window */
 static SDL_Window *switch_window = NULL;
@@ -105,6 +106,11 @@ SWITCH_CreateDevice(int devindex)
     device->GL_DeleteContext = SWITCH_GLES_DeleteContext;
     device->GL_DefaultProfileConfig = SWITCH_GLES_DefaultProfileConfig;
 
+    device->StartTextInput = SWITCH_StartTextInput;
+    device->StopTextInput = SWITCH_StopTextInput;
+    device->HasScreenKeyboardSupport = SWITCH_HasScreenKeyboardSupport;
+    device->IsScreenKeyboardShown = SWITCH_IsScreenKeyboardShown;
+
     device->PumpEvents = SWITCH_PumpEvents;
 
     return device;
@@ -145,6 +151,8 @@ SWITCH_VideoInit(_THIS)
     SWITCH_InitKeyboard();
     // init mouse
     SWITCH_InitMouse();
+    // init software keyboard
+    SWITCH_InitSwkb();
 
     return 0;
 }
@@ -162,6 +170,8 @@ SWITCH_VideoQuit(_THIS)
     SWITCH_QuitKeyboard();
     // exit mouse
     SWITCH_QuitMouse();
+    // exit software keyboard
+    SWITCH_QuitSwkb();
 }
 
 void
@@ -343,9 +353,13 @@ SWITCH_PumpEvents(_THIS)
     }
 
     hidScanInput();
+    // we don't want other inputs overlapping with software keyboard
+    if(!SDL_IsTextInputActive()) {
         SWITCH_PollTouch();
         SWITCH_PollKeyboard();
         SWITCH_PollMouse();
+    }
+    SWITCH_PollSwkb();
 
     // handle docked / un-docked modes
     // note that SDL_WINDOW_RESIZABLE is only possible in windowed mode,