From 109cbd6e8bd621ed4d7df59d70071cf1ba2d4e42 Mon Sep 17 00:00:00 2001
From: Alex Szpakowski <slime73@gmail.com>
Date: Sun, 4 Aug 2019 16:56:40 -0300
Subject: [PATCH] Fix touch-related compile errors on Linux.

---
 src/core/linux/SDL_evdev.c           |  9 ++++++---
 src/video/wayland/SDL_waylandtouch.c | 15 +++++++++++++--
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/src/core/linux/SDL_evdev.c b/src/core/linux/SDL_evdev.c
index 819c5bf9df26c..b33a8fdf20cdf 100644
--- a/src/core/linux/SDL_evdev.c
+++ b/src/core/linux/SDL_evdev.c
@@ -401,18 +401,21 @@ SDL_EVDEV_Poll(void)
                                 norm_pressure = 1.0f;
                             }
 
+                            /* FIXME: the touch's window shouldn't be null, but
+                             * the coordinate space of touch positions needs to
+                             * be window-relative in that case. */
                             switch(item->touchscreen_data->slots[j].delta) {
                             case EVDEV_TOUCH_SLOTDELTA_DOWN:
-                                SDL_SendTouch(item->fd, item->touchscreen_data->slots[j].tracking_id, /* FIXME: window */, SDL_TRUE, norm_x, norm_y, norm_pressure);
+                                SDL_SendTouch(item->fd, item->touchscreen_data->slots[j].tracking_id, NULL, SDL_TRUE, norm_x, norm_y, norm_pressure);
                                 item->touchscreen_data->slots[j].delta = EVDEV_TOUCH_SLOTDELTA_NONE;
                                 break;
                             case EVDEV_TOUCH_SLOTDELTA_UP:
-                                SDL_SendTouch(item->fd, item->touchscreen_data->slots[j].tracking_id, /* FIXME: window */, SDL_FALSE, norm_x, norm_y, norm_pressure);
+                                SDL_SendTouch(item->fd, item->touchscreen_data->slots[j].tracking_id, NULL, SDL_FALSE, norm_x, norm_y, norm_pressure);
                                 item->touchscreen_data->slots[j].tracking_id = -1;
                                 item->touchscreen_data->slots[j].delta = EVDEV_TOUCH_SLOTDELTA_NONE;
                                 break;
                             case EVDEV_TOUCH_SLOTDELTA_MOVE:
-                                SDL_SendTouchMotion(item->fd, item->touchscreen_data->slots[j].tracking_id, /* FIXME: window */, norm_x, norm_y, norm_pressure);
+                                SDL_SendTouchMotion(item->fd, item->touchscreen_data->slots[j].tracking_id, NULL, norm_x, norm_y, norm_pressure);
                                 item->touchscreen_data->slots[j].delta = EVDEV_TOUCH_SLOTDELTA_NONE;
                                 break;
                             default:
diff --git a/src/video/wayland/SDL_waylandtouch.c b/src/video/wayland/SDL_waylandtouch.c
index 0750cbb9d0b7e..16d911e282c3f 100644
--- a/src/video/wayland/SDL_waylandtouch.c
+++ b/src/video/wayland/SDL_waylandtouch.c
@@ -26,6 +26,8 @@
 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
 
 #include "SDL_log.h"
+#include "SDL_mouse.h"
+#include "SDL_keyboard.h"
 #include "SDL_waylandtouch.h"
 #include "../../events/SDL_touch_c.h"
 
@@ -88,20 +90,29 @@ touch_handle_touch(void *data,
     uint32_t capabilities = flags >> 16;
     */
 
+    SDL_Window* window = NULL;
+
     SDL_TouchID deviceId = 1;
     if (SDL_AddTouch(deviceId, SDL_TOUCH_DEVICE_DIRECT, "qt_touch_extension") < 0) {
          SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__);
     }
 
+    /* FIXME: This should be the window the given wayland surface is associated
+     * with, but how do we get the wayland surface? */
+    window = SDL_GetMouseFocus();
+    if (window == NULL) {
+        window = SDL_GetKeyboardFocus();
+    }
+
     switch (touchState) {
         case QtWaylandTouchPointPressed:
         case QtWaylandTouchPointReleased:
-            SDL_SendTouch(deviceId, (SDL_FingerID)id, /* FIXME: window */,
+            SDL_SendTouch(deviceId, (SDL_FingerID)id, window,
                     (touchState == QtWaylandTouchPointPressed) ? SDL_TRUE : SDL_FALSE,
                     xf, yf, pressuref);
             break;
         case QtWaylandTouchPointMoved:
-            SDL_SendTouchMotion(deviceId, (SDL_FingerID)id, /* FIXME: window */, xf, yf, pressuref);
+            SDL_SendTouchMotion(deviceId, (SDL_FingerID)id, window, xf, yf, pressuref);
             break;
         default:
             /* Should not happen */