backends/native: Add distinct meta-input-thread.h header

Make it impossible to add individual includes of input thread objects.
This must go through meta-input-thread.h now, which should be enough
to make anyone think it twice.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>

18 files changed, 67 insertions, 23 deletions

diff --git a/src/backends/native/meta-backend-native-types.h b/src/backends/native/meta-backend-native-types.h
index bfc506788..ba73b4a56 100644
--- a/src/backends/native/meta-backend-native-types.h
+++ b/src/backends/native/meta-backend-native-types.h
@@ -23,5 +23,7 @@
 
 typedef struct _MetaBackendNative MetaBackendNative;
 typedef struct _MetaSeatNative MetaSeatNative;
+typedef struct _MetaSeatImpl MetaSeatImpl;
+typedef struct _MetaKeymapNative MetaKeymapNative;
 
 #endif /* META_BACKEND_NATIVE_TYPES_H */
diff --git a/src/backends/native/meta-backend-native.c b/src/backends/native/meta-backend-native.c
index c397a7893..939885a64 100644
--- a/src/backends/native/meta-backend-native.c
+++ b/src/backends/native/meta-backend-native.c
@@ -36,6 +36,7 @@
 
 #include "backends/native/meta-backend-native.h"
 #include "backends/native/meta-backend-native-private.h"
+#include "backends/native/meta-input-thread.h"
 
 #include <sched.h>
 #include <stdlib.h>
@@ -50,8 +51,6 @@
 #include "backends/meta-stage-private.h"
 #include "backends/native/meta-clutter-backend-native.h"
 #include "backends/native/meta-event-native.h"
-#include "backends/native/meta-input-device-native.h"
-#include "backends/native/meta-input-settings-native.h"
 #include "backends/native/meta-kms.h"
 #include "backends/native/meta-kms-device.h"
 #include "backends/native/meta-launcher.h"
diff --git a/src/backends/native/meta-event-native.c b/src/backends/native/meta-event-native.c
index 61603d19e..8a1d8f348 100644
--- a/src/backends/native/meta-event-native.c
+++ b/src/backends/native/meta-event-native.c
@@ -21,7 +21,7 @@
 #include "config.h"
 
 #include "backends/native/meta-event-native.h"
-#include "backends/native/meta-input-device-native.h"
+#include "backends/native/meta-input-thread.h"
 #include "clutter/clutter-mutter.h"
 
 typedef struct _MetaEventNative MetaEventNative;
diff --git a/src/backends/native/meta-input-device-native.c b/src/backends/native/meta-input-device-native.c
index 9aab8e070..2878675f2 100644
--- a/src/backends/native/meta-input-device-native.c
+++ b/src/backends/native/meta-input-device-native.c
@@ -25,9 +25,7 @@
 #include <cairo-gobject.h>
 
 #include "backends/meta-backend-private.h"
-#include "backends/native/meta-input-device-tool-native.h"
-#include "backends/native/meta-input-device-native.h"
-#include "backends/native/meta-seat-impl.h"
+#include "backends/native/meta-input-thread.h"
 #include "clutter/clutter-mutter.h"
 
 G_DEFINE_TYPE (MetaInputDeviceNative,
diff --git a/src/backends/native/meta-input-device-native.h b/src/backends/native/meta-input-device-native.h
index db28d0516..2000888dc 100644
--- a/src/backends/native/meta-input-device-native.h
+++ b/src/backends/native/meta-input-device-native.h
@@ -26,6 +26,10 @@
 #ifndef META_INPUT_DEVICE_NATIVE_H
 #define META_INPUT_DEVICE_NATIVE_H
 
+#ifndef META_INPUT_THREAD_H_INSIDE
+#error "This header cannot be included directly. Use "backends/native/meta-input-thread.h""
+#endif /* META_INPUT_THREAD_H_INSIDE */
+
 #include <glib-object.h>
 
 #include "backends/meta-input-device-private.h"
diff --git a/src/backends/native/meta-input-device-tool-native.c b/src/backends/native/meta-input-device-tool-native.c
index ad6a3bdb6..e6ec0c758 100644
--- a/src/backends/native/meta-input-device-tool-native.c
+++ b/src/backends/native/meta-input-device-tool-native.c
@@ -19,7 +19,7 @@
 
 #include "config.h"
 
-#include "backends/native/meta-input-device-tool-native.h"
+#include "backends/native/meta-input-thread.h"
 
 G_DEFINE_TYPE (MetaInputDeviceToolNative, meta_input_device_tool_native,
                CLUTTER_TYPE_INPUT_DEVICE_TOOL)
diff --git a/src/backends/native/meta-input-device-tool-native.h b/src/backends/native/meta-input-device-tool-native.h
index 3eff6261c..fa12358ad 100644
--- a/src/backends/native/meta-input-device-tool-native.h
+++ b/src/backends/native/meta-input-device-tool-native.h
@@ -20,6 +20,10 @@
 #ifndef META_INPUT_DEVICE_NATIVE_TOOL_H
 #define META_INPUT_DEVICE_NATIVE_TOOL_H
 
+#ifndef META_INPUT_THREAD_H_INSIDE
+#error "This header cannot be included directly. Use "backends/native/meta-input-thread.h""
+#endif /* META_INPUT_THREAD_H_INSIDE */
+
 #include <libinput.h>
 
 #include "clutter/clutter.h"
diff --git a/src/backends/native/meta-input-settings-native.c b/src/backends/native/meta-input-settings-native.c
index becf557db..3f9f71fe7 100644
--- a/src/backends/native/meta-input-settings-native.c
+++ b/src/backends/native/meta-input-settings-native.c
@@ -27,8 +27,7 @@
 #include <libinput.h>
 
 #include "backends/native/meta-backend-native.h"
-#include "backends/native/meta-input-device-native.h"
-#include "backends/native/meta-input-device-tool-native.h"
+#include "backends/native/meta-input-thread.h"
 #include "backends/native/meta-input-settings-native.h"
 
 G_DEFINE_TYPE (MetaInputSettingsNative, meta_input_settings_native, META_TYPE_INPUT_SETTINGS)
diff --git a/src/backends/native/meta-input-settings-native.h b/src/backends/native/meta-input-settings-native.h
index 43926fd5f..cddd5b15f 100644
--- a/src/backends/native/meta-input-settings-native.h
+++ b/src/backends/native/meta-input-settings-native.h
@@ -22,6 +22,10 @@
 #ifndef META_INPUT_SETTINGS_NATIVE_H
 #define META_INPUT_SETTINGS_NATIVE_H
 
+#ifndef META_INPUT_THREAD_H_INSIDE
+#error "This header cannot be included directly. Use "backends/native/meta-input-thread.h""
+#endif /* META_INPUT_THREAD_H_INSIDE */
+
 #include "backends/meta-input-settings-private.h"
 
 #define META_TYPE_INPUT_SETTINGS_NATIVE             (meta_input_settings_native_get_type ())
diff --git a/src/backends/native/meta-input-thread.h b/src/backends/native/meta-input-thread.h
new file mode 100644
index 000000000..196adc27b
--- /dev/null
+++ b/src/backends/native/meta-input-thread.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2020 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Carlos Garnacho <carlosg@gnome.org>
+ */
+
+#ifndef META_INPUT_THREAD_H
+#define META_INPUT_THREAD_H
+
+#define META_INPUT_THREAD_H_INSIDE
+
+#include "src/backends/native/meta-input-device-native.h"
+#include "src/backends/native/meta-input-device-tool-native.h"
+#include "src/backends/native/meta-input-settings-native.h"
+#include "src/backends/native/meta-keymap-native.h"
+#include "src/backends/native/meta-seat-impl.h"
+
+#undef META_INPUT_THREAD_H_INSIDE
+
+#endif /* META_INPUT_THREAD_H */
diff --git a/src/backends/native/meta-keymap-native.c b/src/backends/native/meta-keymap-native.c
index 036eb6b4d..d3348e8a9 100644
--- a/src/backends/native/meta-keymap-native.c
+++ b/src/backends/native/meta-keymap-native.c
@@ -22,7 +22,7 @@
 #include "config.h"
 
 #include "backends/meta-keymap-utils.h"
-#include "backends/native/meta-keymap-native.h"
+#include "backends/native/meta-input-thread.h"
 #include "backends/native/meta-seat-native.h"
 
 static const char *option_xkb_layout = "us";
diff --git a/src/backends/native/meta-keymap-native.h b/src/backends/native/meta-keymap-native.h
index 49da0775d..6a6b12d9a 100644
--- a/src/backends/native/meta-keymap-native.h
+++ b/src/backends/native/meta-keymap-native.h
@@ -21,6 +21,10 @@
 #ifndef META_KEYMAP_NATIVE_H
 #define META_KEYMAP_NATIVE_H
 
+#ifndef META_INPUT_THREAD_H_INSIDE
+#error "This header cannot be included directly. Use "backends/native/meta-input-thread.h""
+#endif /* META_INPUT_THREAD_H_INSIDE */
+
 #include "backends/native/meta-xkb-utils.h"
 #include "clutter/clutter.h"
 
diff --git a/src/backends/native/meta-launcher.c b/src/backends/native/meta-launcher.c
index c794563ef..190d0fa88 100644
--- a/src/backends/native/meta-launcher.c
+++ b/src/backends/native/meta-launcher.c
@@ -39,8 +39,8 @@
 #include "backends/native/meta-backend-native.h"
 #include "backends/native/meta-clutter-backend-native.h"
 #include "backends/native/meta-cursor-renderer-native.h"
+#include "backends/native/meta-input-thread.h"
 #include "backends/native/meta-renderer-native.h"
-#include "backends/native/meta-seat-native.h"
 #include "clutter/clutter.h"
 
 #include "meta-dbus-login1.h"
diff --git a/src/backends/native/meta-seat-impl.c b/src/backends/native/meta-seat-impl.c
index 2075ddd34..f5e45e5d0 100644
--- a/src/backends/native/meta-seat-impl.c
+++ b/src/backends/native/meta-seat-impl.c
@@ -27,8 +27,6 @@
 
 #include "config.h"
 
-#include "backends/native/meta-seat-impl.h"
-
 #include <errno.h>
 #include <fcntl.h>
 #include <libinput.h>
@@ -38,10 +36,7 @@
 #include "backends/meta-cursor-tracker-private.h"
 #include "backends/native/meta-barrier-native.h"
 #include "backends/native/meta-event-native.h"
-#include "backends/native/meta-input-device-native.h"
-#include "backends/native/meta-input-device-tool-native.h"
-#include "backends/native/meta-input-settings-native.h"
-#include "backends/native/meta-keymap-native.h"
+#include "backends/native/meta-input-thread.h"
 #include "backends/native/meta-virtual-input-device-native.h"
 #include "clutter/clutter-mutter.h"
 #include "core/bell.h"
diff --git a/src/backends/native/meta-seat-impl.h b/src/backends/native/meta-seat-impl.h
index ac5b7e42d..ab0ef75d3 100644
--- a/src/backends/native/meta-seat-impl.h
+++ b/src/backends/native/meta-seat-impl.h
@@ -23,6 +23,10 @@
 #ifndef META_SEAT_IMPL_H
 #define META_SEAT_IMPL_H
 
+#ifndef META_INPUT_THREAD_H_INSIDE
+#error "This header cannot be included directly. Use "backends/native/meta-input-thread.h""
+#endif /* META_INPUT_THREAD_H_INSIDE */
+
 #include <gudev/gudev.h>
 #include <libinput.h>
 #include <linux/input-event-codes.h>
diff --git a/src/backends/native/meta-seat-native.c b/src/backends/native/meta-seat-native.c
index 432b0fc00..73abb9052 100644
--- a/src/backends/native/meta-seat-native.c
+++ b/src/backends/native/meta-seat-native.c
@@ -32,8 +32,7 @@
 #include "backends/meta-keymap-utils.h"
 #include "backends/native/meta-barrier-native.h"
 #include "backends/native/meta-event-native.h"
-#include "backends/native/meta-input-device-native.h"
-#include "backends/native/meta-input-device-tool-native.h"
+#include "backends/native/meta-input-thread.h"
 #include "backends/native/meta-keymap-native.h"
 #include "backends/native/meta-virtual-input-device-native.h"
 #include "clutter/clutter-mutter.h"
diff --git a/src/backends/native/meta-seat-native.h b/src/backends/native/meta-seat-native.h
index 4f7c30e46..7f94828d0 100644
--- a/src/backends/native/meta-seat-native.h
+++ b/src/backends/native/meta-seat-native.h
@@ -27,12 +27,12 @@
 #include <libinput.h>
 #include <linux/input-event-codes.h>
 
+#include "backends/meta-input-settings-private.h"
 #include "backends/meta-viewport-info.h"
+#include "backends/native/meta-backend-native-types.h"
 #include "backends/native/meta-barrier-native.h"
 #include "backends/native/meta-cursor-renderer-native.h"
-#include "backends/native/meta-keymap-native.h"
 #include "backends/native/meta-pointer-constraint-native.h"
-#include "backends/native/meta-seat-impl.h"
 #include "backends/native/meta-xkb-utils.h"
 #include "clutter/clutter.h"
 
diff --git a/src/backends/native/meta-virtual-input-device-native.c b/src/backends/native/meta-virtual-input-device-native.c
index 39caa8b09..9291d3f3d 100644
--- a/src/backends/native/meta-virtual-input-device-native.c
+++ b/src/backends/native/meta-virtual-input-device-native.c
@@ -22,8 +22,7 @@
 #include <glib-object.h>
 #include <linux/input.h>
 
-#include "backends/native/meta-input-device-native.h"
-#include "backends/native/meta-keymap-native.h"
+#include "backends/native/meta-input-thread.h"
 #include "backends/native/meta-seat-native.h"
 #include "backends/native/meta-virtual-input-device-native.h"
 #include "clutter/clutter-mutter.h"