From 5ee7a43a2991addc3c32c84d4ba06f734b5d4595 Mon Sep 17 00:00:00 2001
From: Colin Kinloch <colin.kinloch@collabora.com>
Date: Wed, 17 Apr 2024 16:15:24 +0100
Subject: [PATCH] wayland: Open content from drag and drop

---
 Makefile.common               |  5 +++
 input/common/wayland_common.c | 69 ++++++++++++++++++++++++++++++++++-
 qb/config.libs.sh             |  1 +
 qb/config.params.sh           |  1 +
 4 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/Makefile.common b/Makefile.common
index f7158506cff..f743f5a0b76 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -1265,6 +1265,11 @@ ifeq ($(HAVE_WAYLAND), 1)
 
 endif
 
+ifeq (${HAVE_GLIB}, 1)
+  DEF_FLAGS += $(GLIB_CFLAGS)
+  LIBS += $(GLIB_LIBS)
+endif
+
 # XML
 OBJ += \
        $(LIBRETRO_COMM_DIR)/formats/xml/rxml.o \
diff --git a/input/common/wayland_common.c b/input/common/wayland_common.c
index 1a36c61b602..0e7c9a993dd 100644
--- a/input/common/wayland_common.c
+++ b/input/common/wayland_common.c
@@ -18,6 +18,12 @@
 #define _GNU_SOURCE /* See feature_test_macros(7) */
 #endif
 
+#ifdef HAVE_GLIB
+#include <glib.h>
+#endif
+#include "../../tasks/task_content.h"
+#include "../../paths.h"
+
 #include <stdint.h>
 #include <string.h>
 
@@ -947,6 +953,67 @@ static void wl_data_device_handle_motion(void *data,
       struct wl_data_device *data_device, uint32_t time,
       wl_fixed_t x, wl_fixed_t y) { }
 
+static bool wayland_load_content_from_drop(const char* path)
+{
+   core_info_list_t *core_info_list = NULL;
+   core_info_get_list(&core_info_list);
+   if (core_info_list)
+   {
+      size_t list_size;
+      content_ctx_info_t content_info  = { 0 };
+      const core_info_t *core_info     = NULL;
+      core_info_list_get_supported_cores(core_info_list,
+            (const char*)path, &core_info, &list_size);
+      if (list_size)
+      {
+         path_set(RARCH_PATH_CONTENT, path);
+
+         if (!path_is_empty(RARCH_PATH_CONTENT))
+         {
+            unsigned i;
+            core_info_t *current_core = NULL;
+            core_info_get_current_core(&current_core);
+
+            /*we already have path for libretro core */
+            for (i = 0; i < list_size; i++)
+            {
+               const core_info_t *info = (const core_info_t*)&core_info[i];
+
+               if (string_is_equal(path_get(RARCH_PATH_CORE), info->path))
+               {
+                  /* Our previous core supports the current rom */
+                  task_push_load_content_with_current_core_from_companion_ui(
+                        NULL,
+                        &content_info,
+                        CORE_TYPE_PLAIN,
+                        NULL, NULL);
+                  return true;
+               }
+            }
+         }
+      }
+
+      if (list_size >= 1)
+      {
+         /*pick core that only exists and is bound to work. Ish. */
+         const core_info_t *info = (const core_info_t*)&core_info[0];
+
+         if (info)
+         {
+            task_push_load_content_with_new_core_from_companion_ui(
+                  info->path, NULL, NULL, NULL, NULL, &content_info, NULL, NULL);
+            return true;
+         }
+      }
+      else
+      {
+         RARCH_WARN("There are no core to open %s\n", path);
+      }
+   }
+
+   return false;
+}
+
 static void wl_data_device_handle_drop(void *data,
       struct wl_data_device *data_device)
 {
@@ -994,7 +1061,7 @@ static void wl_data_device_handle_drop(void *data,
 
       /* TODO/FIXME: Convert from file:// URI, Implement file loading
        * Drag and Drop */
-#if 0
+#ifdef HAVE_GLIB
       if (wayland_load_content_from_drop(g_filename_from_uri(line, NULL, NULL)))
          RARCH_WARN("----- wayland_load_content_from_drop success\n");
 #endif
diff --git a/qb/config.libs.sh b/qb/config.libs.sh
index 39092b5e6cb..754caab65fa 100644
--- a/qb/config.libs.sh
+++ b/qb/config.libs.sh
@@ -264,6 +264,7 @@ else
    check_lib '' AL -lopenal alcOpenDevice
 fi
 
+check_pkgconf GLIB glib-2.0 2.78.0
 check_pkgconf RSOUND rsound 1.1
 check_pkgconf ROAR libroar 1.0.12
 check_val '' JACK -ljack '' jack 0.120.1 '' false
diff --git a/qb/config.params.sh b/qb/config.params.sh
index d261c8f6f37..59b93ba93d4 100644
--- a/qb/config.params.sh
+++ b/qb/config.params.sh
@@ -104,6 +104,7 @@ HAVE_WAYLAND=auto          # Wayland support
 HAVE_LIBDECOR=auto         # libdecor support
 C89_WAYLAND=no
 CXX_WAYLAND=no
+HAVE_GLIB=auto             # GLib support
 HAVE_DYNAMIC_EGL=no        # Dynamic library EGL support
 HAVE_EGL=auto              # EGL context support
 HAVE_VG=auto               # OpenVG support