From 840a40de0026044345529c5dd61e96f49f4006c6 Mon Sep 17 00:00:00 2001
From: Charlotte Meyer <dev@buffet.sh>
Date: Thu, 7 Mar 2019 19:25:38 +0100
Subject: [PATCH] Basic cursor handling

---
 include/kiwmi/input/cursor.h | 24 ++++++++++++
 include/kiwmi/server.h       |  3 ++
 kiwmi/input/cursor.c         | 71 ++++++++++++++++++++++++++++++++++++
 kiwmi/meson.build            |  1 +
 kiwmi/server.c               | 11 ++++++
 5 files changed, 110 insertions(+)
 create mode 100644 include/kiwmi/input/cursor.h
 create mode 100644 kiwmi/input/cursor.c

diff --git a/include/kiwmi/input/cursor.h b/include/kiwmi/input/cursor.h
new file mode 100644
index 0000000..100f0b8
--- /dev/null
+++ b/include/kiwmi/input/cursor.h
@@ -0,0 +1,24 @@
+/* Copyright (c), Charlotte Meyer <dev@buffet.sh>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef KIWMI_INPUT_CURSOR_H
+#define KIWMI_INPUT_CURSOR_H
+
+#include <wlr/types/wlr_cursor.h>
+#include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_xcursor_manager.h>
+
+struct kiwmi_cursor {
+    struct wlr_cursor *cursor;
+    struct wlr_xcursor_manager *xcursor_manager;
+    struct wl_listener cursor_motion;
+    struct wl_listener cursor_motion_absolute;
+};
+
+struct kiwmi_cursor *cursor_create(struct wlr_output_layout *output_layout);
+
+#endif /* KIWMI_INPUT_CURSOR_H */
diff --git a/include/kiwmi/server.h b/include/kiwmi/server.h
index b39e5b3..5cb8b6c 100644
--- a/include/kiwmi/server.h
+++ b/include/kiwmi/server.h
@@ -14,6 +14,8 @@
 #include <wlr/types/wlr_data_device.h>
 #include <wlr/types/wlr_output_layout.h>
 
+#include "kiwmi/input/cursor.h"
+
 struct kiwmi_server {
     struct wl_display *wl_display;
     struct wlr_backend *backend;
@@ -23,6 +25,7 @@ struct kiwmi_server {
     const char *socket;
     struct wl_list outputs; // struct kiwmi_output::link
     struct wl_listener new_output;
+    struct kiwmi_cursor *cursor;
 };
 
 bool server_init(struct kiwmi_server *server);
diff --git a/kiwmi/input/cursor.c b/kiwmi/input/cursor.c
new file mode 100644
index 0000000..0cd6ec7
--- /dev/null
+++ b/kiwmi/input/cursor.c
@@ -0,0 +1,71 @@
+/* Copyright (c), Charlotte Meyer <dev@buffet.sh>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "kiwmi/input/cursor.h"
+
+#include <stdlib.h>
+
+#include <wayland-server.h>
+#include <wlr/types/wlr_cursor.h>
+#include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_xcursor_manager.h>
+#include <wlr/util/log.h>
+
+static void
+cursor_motion_notify(struct wl_listener *listener, void *data)
+{
+    struct kiwmi_cursor *cursor =
+        wl_container_of(listener, cursor, cursor_motion);
+    struct wlr_event_pointer_motion *event = data;
+
+    wlr_cursor_move(
+        cursor->cursor, event->device, event->delta_x, event->delta_y);
+}
+
+static void
+cursor_motion_absolute_notify(struct wl_listener *listener, void *data)
+{
+    struct kiwmi_cursor *cursor =
+        wl_container_of(listener, cursor, cursor_motion);
+    struct wlr_event_pointer_motion_absolute *event = data;
+
+    wlr_cursor_warp_absolute(cursor->cursor, event->device, event->x, event->y);
+}
+
+struct kiwmi_cursor *
+cursor_create(struct wlr_output_layout *output_layout)
+{
+    wlr_log(WLR_DEBUG, "Creating cursor");
+
+    struct kiwmi_cursor *cursor = malloc(sizeof(*cursor));
+    if (!cursor) {
+        wlr_log(WLR_ERROR, "Failed to allocate kiwmi_cursor");
+        return NULL;
+    }
+
+    cursor->cursor = wlr_cursor_create();
+    if (!cursor->cursor) {
+        wlr_log(WLR_ERROR, "Failed to create cursor");
+        free(cursor);
+        return NULL;
+    }
+
+    wlr_cursor_attach_output_layout(cursor->cursor, output_layout);
+
+    cursor->xcursor_manager = wlr_xcursor_manager_create(NULL, 24);
+    wlr_xcursor_manager_load(cursor->xcursor_manager, 1);
+
+    cursor->cursor_motion.notify = cursor_motion_notify;
+    wl_signal_add(&cursor->cursor->events.motion, &cursor->cursor_motion);
+
+    cursor->cursor_motion_absolute.notify = cursor_motion_absolute_notify;
+    wl_signal_add(
+        &cursor->cursor->events.motion_absolute,
+        &cursor->cursor_motion_absolute);
+
+    return cursor;
+}
diff --git a/kiwmi/meson.build b/kiwmi/meson.build
index 72efcab..320792c 100644
--- a/kiwmi/meson.build
+++ b/kiwmi/meson.build
@@ -3,6 +3,7 @@ kiwmi_sources = files(
   'server.c',
   'output.c',
   'desktop/output.c',
+  'input/cursor.c',
 )
 
 kiwmi_deps = [
diff --git a/kiwmi/server.c b/kiwmi/server.c
index bcbf1d2..fe19a84 100644
--- a/kiwmi/server.c
+++ b/kiwmi/server.c
@@ -13,11 +13,14 @@
 #include <wlr/backend.h>
 #include <wlr/render/wlr_renderer.h>
 #include <wlr/types/wlr_compositor.h>
+#include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_data_device.h>
 #include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_xcursor_manager.h>
 #include <wlr/util/log.h>
 
 #include "kiwmi/desktop/output.h"
+#include "kiwmi/input/cursor.h"
 
 bool
 server_init(struct kiwmi_server *server)
@@ -39,6 +42,14 @@ server_init(struct kiwmi_server *server)
     server->data_device_manager =
         wlr_data_device_manager_create(server->wl_display);
 
+    server->cursor = cursor_create(server->output_layout);
+    if (!server->cursor) {
+        wlr_log(WLR_ERROR, "Failed to create cursor");
+        wlr_backend_destroy(server->backend);
+        wl_display_destroy(server->wl_display);
+        return false;
+    }
+
     server->output_layout = wlr_output_layout_create();
 
     wl_list_init(&server->outputs);