types: implement wlr_foreign_toplevel_management_v1

6 files changed, 937 insertions, 0 deletions

diff --git a/include/wlr/types/meson.build b/include/wlr/types/meson.build
index 72debcf3..e2ce86e3 100644
--- a/include/wlr/types/meson.build
+++ b/include/wlr/types/meson.build
@@ -5,6 +5,7 @@ install_headers(
 	'wlr_cursor.h',
 	'wlr_data_device.h',
 	'wlr_export_dmabuf_v1.h',
+	'wlr_foreign_toplevel_management_v1.h',
 	'wlr_gamma_control_v1.h',
 	'wlr_gamma_control.h',
 	'wlr_gtk_primary_selection.h',
diff --git a/include/wlr/types/wlr_foreign_toplevel_management_v1.h b/include/wlr/types/wlr_foreign_toplevel_management_v1.h
new file mode 100644
index 00000000..75ae0e64
--- /dev/null
+++ b/include/wlr/types/wlr_foreign_toplevel_management_v1.h
@@ -0,0 +1,120 @@
+/*
+ * This an unstable interface of wlroots. No guarantees are made regarding the
+ * future consistency of this API.
+ */
+#ifndef WLR_USE_UNSTABLE
+#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
+#endif
+
+#ifndef WLR_TYPES_WLR_FOREIGN_TOPLEVEL_MANAGEMENT_V1_H
+#define WLR_TYPES_WLR_FOREIGN_TOPLEVEL_MANAGEMENT_V1_H
+
+#include <wayland-server.h>
+#include <wlr/types/wlr_output.h>
+
+struct wlr_foreign_toplevel_manager_v1 {
+	struct wl_event_loop *event_loop;
+	struct wl_global *global;
+	struct wl_list resources;
+	struct wl_list toplevels; // wlr_foreign_toplevel_handle_v1::link
+
+	struct wl_listener display_destroy;
+
+	struct {
+		struct wl_signal destroy;
+	} events;
+
+	void *data;
+};
+
+enum wlr_foreign_toplevel_handle_v1_state {
+	WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MAXIMIZED = 1,
+	WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MINIMIZED = 2,
+	WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_ACTIVATED = 4,
+};
+
+struct wlr_foreign_toplevel_handle_v1_output {
+	struct wl_list link; // wlr_foreign_toplevel_handle_v1::outputs
+	struct wl_listener output_destroy;
+	struct wlr_output *output;
+
+	struct wlr_foreign_toplevel_handle_v1 *toplevel;
+};
+
+struct wlr_foreign_toplevel_handle_v1 {
+	struct wlr_foreign_toplevel_manager_v1 *manager;
+	struct wl_list resources;
+	struct wl_list link;
+	struct wl_event_source *idle_source;
+
+	char *title;
+	char *app_id;
+	struct wl_list outputs; // wlr_foreign_toplevel_v1_output
+	uint32_t state; // wlr_foreign_toplevel_v1_state
+
+	struct {
+		// wlr_foreign_toplevel_handle_v1_maximized_event
+		struct wl_signal request_maximize;
+		//wlr_foreign_toplevel_handle_v1_minimized_event
+		struct wl_signal request_minimize;
+		//wlr_foreign_toplevel_handle_v1_activated_event
+		struct wl_signal request_activate;
+		struct wl_signal request_close;
+
+		//wlr_foreign_toplevel_handle_v1_set_rectangle_event
+		struct wl_signal set_rectangle;
+		struct wl_signal destroy;
+	} events;
+
+	void *data;
+};
+
+struct wlr_foreign_toplevel_handle_v1_maximized_event {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel;
+	bool maximized;
+};
+
+struct wlr_foreign_toplevel_handle_v1_minimized_event {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel;
+	bool minimized;
+};
+
+struct wlr_foreign_toplevel_handle_v1_activated_event {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel;
+	struct wlr_seat *seat;
+};
+
+struct wlr_foreign_toplevel_handle_v1_set_rectangle_event {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel;
+	struct wlr_surface *surface;
+	int32_t x, y, width, height;
+};
+
+struct wlr_foreign_toplevel_manager_v1 *wlr_foreign_toplevel_manager_v1_create(
+	struct wl_display *display);
+void wlr_foreign_toplevel_manager_v1_destroy(
+	struct wlr_foreign_toplevel_manager_v1 *manager);
+
+struct wlr_foreign_toplevel_handle_v1 *wlr_foreign_toplevel_handle_v1_create(
+	struct wlr_foreign_toplevel_manager_v1 *manager);
+void wlr_foreign_toplevel_handle_v1_destroy(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel);
+
+void wlr_foreign_toplevel_handle_v1_set_title(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, const char *title);
+void wlr_foreign_toplevel_handle_v1_set_app_id(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, const char *app_id);
+
+void wlr_foreign_toplevel_handle_v1_output_enter(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, struct wlr_output *output);
+void wlr_foreign_toplevel_handle_v1_output_leave(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, struct wlr_output *output);
+
+void wlr_foreign_toplevel_handle_v1_set_maximized(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, bool maximized);
+void wlr_foreign_toplevel_handle_v1_set_minimized(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, bool minimized);
+void wlr_foreign_toplevel_handle_v1_set_activated(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, bool activated);
+
+#endif
diff --git a/protocol/meson.build b/protocol/meson.build
index dfe2a5ec..58f57046 100644
--- a/protocol/meson.build
+++ b/protocol/meson.build
@@ -30,6 +30,7 @@ protocols = [
 	'virtual-keyboard-unstable-v1.xml',
 	'wlr-export-dmabuf-unstable-v1.xml',
 	'wlr-gamma-control-unstable-v1.xml',
+	'wlr-foreign-toplevel-management-unstable-v1.xml',
 	'wlr-input-inhibitor-unstable-v1.xml',
 	'wlr-layer-shell-unstable-v1.xml',
 	'wlr-screencopy-unstable-v1.xml',
@@ -47,6 +48,7 @@ client_protocols = [
 	'text-input-unstable-v3.xml',
 	'wlr-export-dmabuf-unstable-v1.xml',
 	'wlr-gamma-control-unstable-v1.xml',
+	'wlr-foreign-toplevel-management-unstable-v1.xml',
 	'wlr-input-inhibitor-unstable-v1.xml',
 	'wlr-layer-shell-unstable-v1.xml',
 	'wlr-screencopy-unstable-v1.xml',
diff --git a/protocol/wlr-foreign-toplevel-management-unstable-v1.xml b/protocol/wlr-foreign-toplevel-management-unstable-v1.xml
new file mode 100644
index 00000000..234d9535
--- /dev/null
+++ b/protocol/wlr-foreign-toplevel-management-unstable-v1.xml
@@ -0,0 +1,235 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_foreign_toplevel_management_unstable_v1">
+  <copyright>
+    Copyright © 2018 Ilia Bozhinov
+
+    Permission to use, copy, modify, distribute, and sell this
+    software and its documentation for any purpose is hereby granted
+    without fee, provided that the above copyright notice appear in
+    all copies and that both that copyright notice and this permission
+    notice appear in supporting documentation, and that the name of
+    the copyright holders not be used in advertising or publicity
+    pertaining to distribution of the software without specific,
+    written prior permission.  The copyright holders make no
+    representations about the suitability of this software for any
+    purpose.  It is provided "as is" without express or implied
+    warranty.
+
+    THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+    SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+    FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+    SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+    AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+    ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+    THIS SOFTWARE.
+  </copyright>
+
+  <interface name="zwlr_foreign_toplevel_manager_v1" version="1">
+    <description summary="list and control opened apps">
+      The purpose of this protocol is to enable the creation of taskbars
+      and docks by providing them with a list of opened applications and
+      letting them request certain actions on them, like maximizing, etc.
+
+      After a client binds the zwlr_foreign_toplevel_manager_v1, each opened
+      toplevel window will be sent via the toplevel event
+    </description>
+
+    <event name="toplevel">
+      <description summary="a toplevel has been created">
+        This event is emitted whenever a new toplevel window is created. It
+        is emitted for all toplevels, regardless of the app that has created
+        them.
+
+        All initial details of the toplevel(title, app_id, states, etc.) will
+        be sent immediately after this event via the corresponding events in
+        zwlr_foreign_toplevel_handle_v1.
+      </description>
+      <arg name="toplevel" type="new_id" interface="zwlr_foreign_toplevel_handle_v1"/>
+    </event>
+
+    <request name="stop">
+      <description summary="stop sending events">
+        Indicates the client no longer wishes to receive events for new toplevels.
+        However the compositor may emit further toplevel_created events, until
+        the finished event is emitted.
+
+        The client must not send any more requests after this one.
+      </description>
+    </request>
+
+    <event name="finished">
+      <description summary="the compositor has finished with the toplevel manager">
+        This event indicates that the compositor is done sending events to the
+        zwlr_foreign_toplevel_manager_v1. The server will destroy the object
+        immediately after sending this request, so it will become invalid and
+        the client should free any resources associated with it.
+      </description>
+    </event>
+  </interface>
+
+  <interface name="zwlr_foreign_toplevel_handle_v1" version="1">
+    <description summary="an opened toplevel">
+      A zwlr_foreign_toplevel_handle_v1 object represents an opened toplevel
+      window. Each app may have multiple opened toplevels.
+
+      Each toplevel has a list of outputs it is visible on, conveyed to the
+      client with the output_enter and output_leave events.
+    </description>
+
+    <event name="title">
+      <description summary="title change">
+        This event is emitted whenever the title of the toplevel changes.
+      </description>
+      <arg name="title" type="string"/>
+    </event>
+
+    <event name="app_id">
+      <description summary="app-id change">
+        This event is emitted whenever the app-id of the toplevel changes.
+      </description>
+      <arg name="app_id" type="string"/>
+    </event>
+
+    <event name="output_enter">
+      <description summary="toplevel entered an output">
+        This event is emitted whenever the toplevel becomes visible on
+        the given output. A toplevel may be visible on multiple outputs.
+      </description>
+      <arg name="output" type="object" interface="wl_output"/>
+    </event>
+
+    <event name="output_leave">
+      <description summary="toplevel left an output">
+        This event is emitted whenever the toplevel stops being visible on
+        the given output. It is guaranteed that an entered-output event
+        with the same output has been emitted before this event.
+      </description>
+      <arg name="output" type="object" interface="wl_output"/>
+    </event>
+
+    <request name="set_maximized">
+      <description summary="requests that the toplevel be maximized">
+        Requests that the toplevel be maximized. If the maximized state actually
+        changes, this will be indicated by the state event.
+      </description>
+    </request>
+
+    <request name="unset_maximized">
+      <description summary="requests that the toplevel be unmaximized">
+        Requests that the toplevel be unmaximized. If the maximized state actually
+        changes, this will be indicated by the state event.
+      </description>
+    </request>
+
+    <request name="set_minimized">
+      <description summary="requests that the toplevel be minimized">
+        Requests that the toplevel be minimized. If the minimized state actually
+        changes, this will be indicated by the state event.
+      </description>
+    </request>
+
+    <request name="unset_minimized">
+      <description summary="requests that the toplevel be unminimized">
+        Requests that the toplevel be unminimized. If the minimized state actually
+        changes, this will be indicated by the state event.
+      </description>
+    </request>
+
+    <request name="activate">
+      <description summary="activate the toplevel">
+        Request that this toplevel be activated on the given seat.
+        There is no guarantee the toplevel will be actually activated.
+      </description>
+      <arg name="seat" type="object" interface="wl_seat"/>
+    </request>
+
+    <enum name="state">
+      <description summary="types of states on the toplevel">
+        The different states that a toplevel can have. These have the same meaning
+        as the states with the same names defined in xdg-toplevel
+      </description>
+
+      <entry name="maximized" value="0" summary="the toplevel is maximized"/>
+      <entry name="minimized" value="1" summary="the toplevel is minimized"/>
+      <entry name="activated" value="2" summary="the toplevel is active"/>
+    </enum>
+
+    <event name="state">
+      <description summary="the toplevel state changed">
+        This event is emitted immediately after the zlw_foreign_toplevel_handle_v1
+        is created and each time the toplevel state changes, either because of a
+        compositor action or because of a request in this protocol.
+      </description>
+
+      <arg name="state" type="array"/>
+    </event>
+
+    <event name="done">
+      <description summary="all information about the toplevel has been sent">
+        This event is sent after all changes in the toplevel state have been
+        sent.
+
+        This allows changes to the zwlr_foreign_toplevel_handle_v1 properties
+        to be seen as atomic, even if they happen via multiple events.
+      </description>
+    </event>
+
+    <request name="close">
+      <description summary="request that the toplevel be closed">
+        Send a request to the toplevel to close itself. The compositor would
+        typically use a shell-specific method to carry out this request, for
+        example by sending the xdg_toplevel.close event. However, this gives
+        no guarantees the toplevel will actually be destroyed. If and when
+        this happens, the zwlr_foreign_toplevel_handle_v1.closed event will
+        be emitted.
+      </description>
+    </request>
+
+    <request name="set_rectangle">
+      <description summary="the rectangle which represents the toplevel">
+        The rectangle of the surface specified in this request corresponds to
+        the place where the app using this protocol represents the given toplevel.
+        It can be used by the compositor as a hint for some operations, e.g
+        minimizing. The client is however not required to set this, in which
+        case the compositor is free to decide some default value.
+
+        If the client specifies more than one rectangle, only the last one is
+        considered.
+
+        The dimensions are given in surface-local coordinates.
+        Setting width=height=0 removes the already-set rectangle.
+      </description>
+
+      <arg name="surface" type="object" interface="wl_surface"/>
+      <arg name="x" type="int"/>
+      <arg name="y" type="int"/>
+      <arg name="width" type="int"/>
+      <arg name="height" type="int"/>
+    </request>
+
+    <enum name="error">
+      <entry name="invalid_rectangle" value="0"
+        summary="the provided rectangle is invalid"/>
+    </enum>
+
+    <event name="closed">
+      <description summary="this toplevel has been destroyed">
+        This event means the toplevel has been destroyed. It is guaranteed there
+        won't be any more events for this zwlr_foreign_toplevel_handle_v1. The
+        toplevel itself becomes inert so any requests will be ignored except the
+        destroy request.
+      </description>
+    </event>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the zwlr_foreign_toplevel_handle_v1 object">
+        Destroys the zwlr_foreign_toplevel_handle_v1 object.
+
+        This request should be called either when the client does not want to
+        use the toplevel anymore or after the closed event to finalize the
+        destruction of the object.
+      </description>
+    </request>
+  </interface>
+</protocol>
diff --git a/types/meson.build b/types/meson.build
index 03e5fcba..643db233 100644
--- a/types/meson.build
+++ b/types/meson.build
@@ -28,6 +28,7 @@ lib_wlr_types = static_library(
 		'wlr_compositor.c',
 		'wlr_cursor.c',
 		'wlr_export_dmabuf_v1.c',
+		'wlr_foreign_toplevel_management_v1.c',
 		'wlr_gamma_control_v1.c',
 		'wlr_gamma_control.c',
 		'wlr_gtk_primary_selection.c',
diff --git a/types/wlr_foreign_toplevel_management_v1.c b/types/wlr_foreign_toplevel_management_v1.c
new file mode 100644
index 00000000..7570716c
--- /dev/null
+++ b/types/wlr_foreign_toplevel_management_v1.c
@@ -0,0 +1,578 @@
+#define _POSIX_C_SOURCE 200809L
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include <wlr/types/wlr_foreign_toplevel_management_v1.h>
+#include <wlr/types/wlr_seat.h>
+#include <wlr/util/log.h>
+#include "util/signal.h"
+#include "wlr-foreign-toplevel-management-unstable-v1-protocol.h"
+
+#define FOREIGN_TOPLEVEL_MANAGEMENT_V1_VERSION 1
+
+static const struct zwlr_foreign_toplevel_handle_v1_interface toplevel_handle_impl;
+
+static struct wlr_foreign_toplevel_handle_v1 *toplevel_handle_from_resource(
+		struct wl_resource *resource) {
+	assert(wl_resource_instance_of(resource,
+			&zwlr_foreign_toplevel_handle_v1_interface,
+			&toplevel_handle_impl));
+	return wl_resource_get_user_data(resource);
+}
+
+static void toplevel_handle_send_maximized_event(struct wl_resource *resource,
+		bool state) {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel =
+		toplevel_handle_from_resource(resource);
+	if (!toplevel) {
+		return;
+	}
+	struct wlr_foreign_toplevel_handle_v1_maximized_event event = {
+		.toplevel = toplevel,
+		.maximized = state,
+	};
+	wlr_signal_emit_safe(&toplevel->events.request_maximize, &event);
+}
+
+void foreign_toplevel_handle_set_maximized(struct wl_client *client,
+		struct wl_resource *resource) {
+	toplevel_handle_send_maximized_event(resource, true);
+}
+
+void foreign_toplevel_handle_unset_maximized(struct wl_client *client,
+		struct wl_resource *resource) {
+	toplevel_handle_send_maximized_event(resource, false);
+}
+
+static void toplevel_send_minimized_event(struct wl_resource *resource,
+		bool state) {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel =
+		toplevel_handle_from_resource(resource);
+	if (!toplevel) {
+		return;
+	}
+
+	struct wlr_foreign_toplevel_handle_v1_minimized_event event = {
+		.toplevel = toplevel,
+		.minimized = state,
+	};
+	wlr_signal_emit_safe(&toplevel->events.request_minimize, &event);
+}
+
+static void foreign_toplevel_handle_set_minimized(struct wl_client *client,
+		struct wl_resource *resource) {
+	toplevel_send_minimized_event(resource, true);
+}
+
+static void foreign_toplevel_handle_unset_minimized(struct wl_client *client,
+		struct wl_resource *resource) {
+	toplevel_send_minimized_event(resource, false);
+}
+
+static void foreign_toplevel_handle_activate(struct wl_client *client,
+		struct wl_resource *resource, struct wl_resource *seat) {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel =
+		toplevel_handle_from_resource(resource);
+	if (!toplevel) {
+		return;
+	}
+
+	struct wlr_seat_client *seat_client = wlr_seat_client_from_resource(seat);
+	struct wlr_foreign_toplevel_handle_v1_activated_event event = {
+		.toplevel = toplevel,
+		.seat = seat_client->seat,
+	};
+	wlr_signal_emit_safe(&toplevel->events.request_activate, &event);
+}
+
+static void foreign_toplevel_handle_close(struct wl_client *client,
+		struct wl_resource *resource) {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel =
+		toplevel_handle_from_resource(resource);
+	if (!toplevel) {
+		return;
+	}
+	wlr_signal_emit_safe(&toplevel->events.request_close, toplevel);
+}
+
+static void foreign_toplevel_handle_set_rectangle(struct wl_client *client,
+		struct wl_resource *resource, struct wl_resource *surface,
+		int32_t x, int32_t y, int32_t width, int32_t height) {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel =
+		toplevel_handle_from_resource(resource);
+	if (!toplevel) {
+		return;
+	}
+
+	if (width < 0 || height < 0) {
+		wl_resource_post_error(resource,
+			ZWLR_FOREIGN_TOPLEVEL_HANDLE_V1_ERROR_INVALID_RECTANGLE,
+			"invalid rectangle passed to set_rectangle: width/height < 0");
+		return;
+	}
+
+	struct wlr_foreign_toplevel_handle_v1_set_rectangle_event event = {
+		.toplevel = toplevel,
+		.surface = wlr_surface_from_resource(surface),
+		.x = x,
+		.y = y,
+		.width = width,
+		.height = height,
+	};
+	wlr_signal_emit_safe(&toplevel->events.set_rectangle, &event);
+}
+
+static void foreign_toplevel_handle_destroy(struct wl_client *client,
+		struct wl_resource *resource) {
+	wl_resource_destroy(resource);
+}
+
+static const struct zwlr_foreign_toplevel_handle_v1_interface toplevel_handle_impl = {
+	.set_maximized = foreign_toplevel_handle_set_maximized,
+	.unset_maximized = foreign_toplevel_handle_unset_maximized,
+	.set_minimized = foreign_toplevel_handle_set_minimized,
+	.unset_minimized = foreign_toplevel_handle_unset_minimized,
+	.activate = foreign_toplevel_handle_activate,
+	.close = foreign_toplevel_handle_close,
+	.set_rectangle = foreign_toplevel_handle_set_rectangle,
+	.destroy = foreign_toplevel_handle_destroy
+};
+
+static void toplevel_idle_send_done(void *data) {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel = data;
+	struct wl_resource *resource;
+	wl_resource_for_each(resource, &toplevel->resources) {
+		zwlr_foreign_toplevel_handle_v1_send_done(resource);
+	}
+
+	toplevel->idle_source = NULL;
+}
+
+static void toplevel_update_idle_source(
+	struct wlr_foreign_toplevel_handle_v1 *toplevel) {
+	if (toplevel->idle_source) {
+		return;
+	}
+
+	toplevel->idle_source = wl_event_loop_add_idle(toplevel->manager->event_loop,
+		toplevel_idle_send_done, toplevel);
+}
+
+void wlr_foreign_toplevel_handle_v1_set_title(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel, const char *title) {
+	free(toplevel->title);
+	toplevel->title = strdup(title);
+
+	struct wl_resource *resource;
+	wl_resource_for_each(resource, &toplevel->resources) {
+		zwlr_foreign_toplevel_handle_v1_send_title(resource, title);
+	}
+
+	toplevel_update_idle_source(toplevel);
+}
+
+void wlr_foreign_toplevel_handle_v1_set_app_id(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel, const char *app_id) {
+	free(toplevel->app_id);
+	toplevel->app_id = strdup(app_id);
+
+	struct wl_resource *resource;
+	wl_resource_for_each(resource, &toplevel->resources) {
+		zwlr_foreign_toplevel_handle_v1_send_app_id(resource, app_id);
+	}
+
+	toplevel_update_idle_source(toplevel);
+}
+
+static void send_output_to_resource(struct wl_resource *resource,
+		struct wlr_output *output, bool enter) {
+	struct wl_client *client = wl_resource_get_client(resource);
+	struct wl_resource *output_resource;
+
+	wl_resource_for_each(output_resource, &output->resources) {
+		if (wl_resource_get_client(output_resource) == client) {
+			if (enter) {
+				zwlr_foreign_toplevel_handle_v1_send_output_enter(resource,
+					output_resource);
+			} else {
+				zwlr_foreign_toplevel_handle_v1_send_output_leave(resource,
+					output_resource);
+			}
+		}
+	}
+}
+
+static void toplevel_send_output(struct wlr_foreign_toplevel_handle_v1 *toplevel,
+		struct wlr_output *output, bool enter) {
+	struct wl_resource *resource;
+	wl_resource_for_each(resource, &toplevel->resources) {
+		send_output_to_resource(resource, output, enter);
+	}
+
+	toplevel_update_idle_source(toplevel);
+}
+
+static void toplevel_handle_output_destroy(struct wl_listener *listener,
+		void *data) {
+	struct wlr_foreign_toplevel_handle_v1_output *toplevel_output =
+		wl_container_of(listener, toplevel_output, output_destroy);
+	wlr_foreign_toplevel_handle_v1_output_leave(toplevel_output->toplevel,
+		toplevel_output->output);
+}
+
+void wlr_foreign_toplevel_handle_v1_output_enter(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel,
+		struct wlr_output *output) {
+	struct wlr_foreign_toplevel_handle_v1_output *toplevel_output;
+	wl_list_for_each(toplevel_output, &toplevel->outputs, link) {
+		if (toplevel_output->output == output) {
+			return; // we have already sent output_enter event
+		}
+	}
+
+	toplevel_output =
+	    calloc(1, sizeof(struct wlr_foreign_toplevel_handle_v1_output));
+	if (!toplevel_output) {
+		wlr_log(WLR_ERROR, "failed to allocate memory for toplevel output");
+		return;
+	}
+
+	toplevel_output->output = output;
+	toplevel_output->toplevel = toplevel;
+	wl_list_insert(&toplevel->outputs, &toplevel_output->link);
+
+	toplevel_output->output_destroy.notify = toplevel_handle_output_destroy;
+	wl_signal_add(&output->events.destroy, &toplevel_output->output_destroy);
+
+	toplevel_send_output(toplevel, output, true);
+}
+
+static void toplevel_output_destroy(
+		struct wlr_foreign_toplevel_handle_v1_output *toplevel_output) {
+	wl_list_remove(&toplevel_output->link);
+	wl_list_remove(&toplevel_output->output_destroy.link);
+	free(toplevel_output);
+}
+
+void wlr_foreign_toplevel_handle_v1_output_leave(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel,
+		struct wlr_output *output) {
+	struct wlr_foreign_toplevel_handle_v1_output *toplevel_output_iterator;
+	struct wlr_foreign_toplevel_handle_v1_output *toplevel_output = NULL;
+
+	wl_list_for_each(toplevel_output_iterator, &toplevel->outputs, link) {
+		if (toplevel_output_iterator->output == output) {
+			toplevel_output = toplevel_output_iterator;
+			break;
+		}
+	}
+
+	if (toplevel_output) {
+		toplevel_send_output(toplevel, output, false);
+		toplevel_output_destroy(toplevel_output);
+	} else {
+		// XXX: log an error? crash?
+	}
+}
+
+static bool fill_array_from_toplevel_state(struct wl_array *array,
+		uint32_t state) {
+	if (state & WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MAXIMIZED) {
+		uint32_t *index = wl_array_add(array, sizeof(uint32_t));
+		if (index == NULL) {
+			return false;
+		}
+		*index = ZWLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MAXIMIZED;
+	}
+	if (state & WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MINIMIZED) {
+		uint32_t *index = wl_array_add(array, sizeof(uint32_t));
+		if (index == NULL) {
+			return false;
+		}
+		*index = ZWLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MINIMIZED;
+	}
+	if (state & WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_ACTIVATED) {
+		uint32_t *index = wl_array_add(array, sizeof(uint32_t));
+		if (index == NULL) {
+			return false;
+		}
+		*index = ZWLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_ACTIVATED;
+	}
+
+	return true;
+}
+
+static void toplevel_send_state(struct wlr_foreign_toplevel_handle_v1 *toplevel) {
+	struct wl_array states;
+	wl_array_init(&states);
+	bool r = fill_array_from_toplevel_state(&states, toplevel->state);
+	if (!r) {
+		struct wl_resource *resource;
+		wl_resource_for_each(resource, &toplevel->resources) {
+			wl_resource_post_no_memory(resource);
+		}
+
+		wl_array_release(&states);
+		return;
+	}
+
+	struct wl_resource *resource;
+	wl_resource_for_each(resource, &toplevel->resources) {
+		zwlr_foreign_toplevel_handle_v1_send_state(resource, &states);
+	}
+
+	wl_array_release(&states);
+	toplevel_update_idle_source(toplevel);
+}
+
+void wlr_foreign_toplevel_handle_v1_set_maximized(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel, bool maximized) {
+	if (maximized) {
+		toplevel->state |= WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MAXIMIZED;
+	} else {
+		toplevel->state &= ~WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MAXIMIZED;
+	}
+	toplevel_send_state(toplevel);
+}
+
+void wlr_foreign_toplevel_handle_v1_set_minimized(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel, bool minimized) {
+	if (minimized) {
+		toplevel->state |= WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MINIMIZED;
+	} else {
+		toplevel->state &= ~WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_MINIMIZED;
+	}
+	toplevel_send_state(toplevel);
+}
+
+void wlr_foreign_toplevel_handle_v1_set_activated(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel, bool activated) {
+	if (activated) {
+		toplevel->state |= WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_ACTIVATED;
+	} else {
+		toplevel->state &= ~WLR_FOREIGN_TOPLEVEL_HANDLE_V1_STATE_ACTIVATED;
+	}
+	toplevel_send_state(toplevel);
+}
+
+void wlr_foreign_toplevel_handle_v1_destroy(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel) {
+	if (!toplevel) {
+		return;
+	}
+
+	wlr_signal_emit_safe(&toplevel->events.destroy, toplevel);
+
+	struct wl_resource *resource, *tmp;
+	wl_resource_for_each_safe(resource, tmp, &toplevel->resources) {
+		zwlr_foreign_toplevel_handle_v1_send_closed(resource);
+		wl_resource_set_user_data(resource, NULL);
+		wl_list_remove(wl_resource_get_link(resource));
+		wl_list_init(wl_resource_get_link(resource));
+	}
+
+	struct wlr_foreign_toplevel_handle_v1_output *toplevel_output, *tmp2;
+	wl_list_for_each_safe(toplevel_output, tmp2, &toplevel->outputs, link) {
+		toplevel_output_destroy(toplevel_output);
+	}
+
+	if (toplevel->idle_source) {
+		wl_event_source_remove(toplevel->idle_source);
+	}
+
+	wl_list_remove(&toplevel->link);
+
+	free(toplevel->title);
+	free(toplevel->app_id);
+	free(toplevel);
+}
+
+static void foreign_toplevel_resource_destroy(struct wl_resource *resource) {
+	wl_list_remove(wl_resource_get_link(resource));
+}
+
+static struct wl_resource *create_toplevel_resource_for_resource(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel,
+		struct wl_resource *manager_resource) {
+	struct wl_client *client = wl_resource_get_client(manager_resource);
+	struct wl_resource *resource = wl_resource_create(client,
+			&zwlr_foreign_toplevel_handle_v1_interface,
+			wl_resource_get_version(manager_resource), 0);
+	if (!resource) {
+		wl_client_post_no_memory(client);
+		return NULL;
+	}
+
+	wl_resource_set_implementation(resource, &toplevel_handle_impl, toplevel,
+	    foreign_toplevel_resource_destroy);
+
+	wl_list_insert(&toplevel->resources, wl_resource_get_link(resource));
+	zwlr_foreign_toplevel_manager_v1_send_toplevel(manager_resource, resource);
+	return resource;
+}
+
+struct wlr_foreign_toplevel_handle_v1 *
+wlr_foreign_toplevel_handle_v1_create(
+		struct wlr_foreign_toplevel_manager_v1 *manager) {
+	struct wlr_foreign_toplevel_handle_v1 *toplevel = calloc(1,
+			sizeof(struct wlr_foreign_toplevel_handle_v1));
+	if (!toplevel) {
+		return NULL;
+	}
+
+	wl_list_insert(&manager->toplevels, &toplevel->link);
+	toplevel->manager = manager;
+
+	wl_list_init(&toplevel->resources);
+	wl_list_init(&toplevel->outputs);
+
+	wl_signal_init(&toplevel->events.request_maximize);
+	wl_signal_init(&toplevel->events.request_minimize);
+	wl_signal_init(&toplevel->events.request_activate);
+	wl_signal_init(&toplevel->events.request_close);
+	wl_signal_init(&toplevel->events.set_rectangle);
+	wl_signal_init(&toplevel->events.destroy);
+
+	struct wl_resource *manager_resource, *tmp;
+	wl_resource_for_each_safe(manager_resource, tmp, &manager->resources) {
+		create_toplevel_resource_for_resource(toplevel, manager_resource);
+	}
+
+	return toplevel;
+}
+
+static const struct zwlr_foreign_toplevel_manager_v1_interface
+	foreign_toplevel_manager_impl;
+
+static void foreign_toplevel_manager_handle_stop(struct wl_client *client,
+		struct wl_resource *resource) {
+	assert(wl_resource_instance_of(resource,
+		&zwlr_foreign_toplevel_manager_v1_interface,
+		&foreign_toplevel_manager_impl));
+
+	zwlr_foreign_toplevel_manager_v1_send_finished(resource);
+	wl_resource_destroy(resource);
+}
+
+static const struct zwlr_foreign_toplevel_manager_v1_interface
+		foreign_toplevel_manager_impl = {
+	.stop = foreign_toplevel_manager_handle_stop
+};
+
+static void foreign_toplevel_manager_resource_destroy(
+		struct wl_resource *resource) {
+	wl_list_remove(wl_resource_get_link(resource));
+}
+
+static void toplevel_send_details_to_toplevel_resource(
+		struct wlr_foreign_toplevel_handle_v1 *toplevel,
+		struct wl_resource *resource) {
+	if (toplevel->title) {
+		zwlr_foreign_toplevel_handle_v1_send_title(resource,
+		    toplevel->title);
+	}
+	if (toplevel->app_id) {
+		zwlr_foreign_toplevel_handle_v1_send_app_id(resource,
+		    toplevel->app_id);
+	}
+
+	struct wlr_foreign_toplevel_handle_v1_output *output;
+	wl_list_for_each(output, &toplevel->outputs, link) {
+		send_output_to_resource(resource, output->output, true);
+	}
+
+	struct wl_array states;
+	wl_array_init(&states);
+	bool r = fill_array_from_toplevel_state(&states, toplevel->state);
+	if (!r) {
+		wl_resource_post_no_memory(resource);
+		wl_array_release(&states);
+		return;
+	}
+
+	zwlr_foreign_toplevel_handle_v1_send_state(resource, &states);
+	wl_array_release(&states);
+
+	zwlr_foreign_toplevel_handle_v1_send_done(resource);
+}
+
+static void foreign_toplevel_manager_bind(struct wl_client *client, void *data,
+		uint32_t version, uint32_t id) {
+	struct wlr_foreign_toplevel_manager_v1 *manager = data;
+	struct wl_resource *resource = wl_resource_create(client,
+			&zwlr_foreign_toplevel_manager_v1_interface, version, id);
+	if (!resource) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+	wl_resource_set_implementation(resource, &foreign_toplevel_manager_impl,
+			manager, foreign_toplevel_manager_resource_destroy);
+
+	wl_list_insert(&manager->resources, wl_resource_get_link(resource));
+
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, *tmp;
+	wl_list_for_each_safe(toplevel, tmp, &manager->toplevels, link) {
+		struct wl_resource *toplevel_resource =
+			create_toplevel_resource_for_resource(toplevel, resource);
+		toplevel_send_details_to_toplevel_resource(toplevel,
+		    toplevel_resource);
+	}
+}
+
+void wlr_foreign_toplevel_manager_v1_destroy(
+		struct wlr_foreign_toplevel_manager_v1 *manager) {
+	if (!manager) {
+		return;
+	}
+
+	struct wlr_foreign_toplevel_handle_v1 *toplevel, *tmp_toplevel;
+	wl_list_for_each_safe(toplevel, tmp_toplevel, &manager->toplevels, link) {
+		wlr_foreign_toplevel_handle_v1_destroy(toplevel);
+	}
+
+	struct wl_resource *resource, *tmp_resource;
+	wl_resource_for_each_safe(resource, tmp_resource, &manager->resources) {
+		wl_resource_destroy(resource);
+	}
+
+	wlr_signal_emit_safe(&manager->events.destroy, manager);
+	wl_list_remove(&manager->display_destroy.link);
+
+	wl_global_destroy(manager->global);
+	free(manager);
+}
+
+static void handle_display_destroy(struct wl_listener *listener, void *data) {
+	struct wlr_foreign_toplevel_manager_v1 *manager =
+		wl_container_of(listener, manager, display_destroy);
+	wlr_foreign_toplevel_manager_v1_destroy(manager);
+}
+
+struct wlr_foreign_toplevel_manager_v1 *wlr_foreign_toplevel_manager_v1_create(
+		struct wl_display *display) {
+	struct wlr_foreign_toplevel_manager_v1 *manager = calloc(1,
+			sizeof(struct wlr_foreign_toplevel_manager_v1));
+	if (!manager) {
+		return NULL;
+	}
+
+	manager->event_loop = wl_display_get_event_loop(display);
+	manager->global = wl_global_create(display,
+			&zwlr_foreign_toplevel_manager_v1_interface,
+			FOREIGN_TOPLEVEL_MANAGEMENT_V1_VERSION, manager,
+			foreign_toplevel_manager_bind);
+	if (!manager->global) {
+		free(manager);
+		return NULL;
+	}
+
+	wl_signal_init(&manager->events.destroy);
+	wl_list_init(&manager->resources);
+	wl_list_init(&manager->toplevels);
+
+	manager->display_destroy.notify = handle_display_destroy;
+	wl_display_add_destroy_listener(display, &manager->display_destroy);
+
+	return manager;
+}