From: Alexandros Frantzis alexandros.frantzis@collabora.com
Use the xdg-shell Wayland protocol to create Wayland xdg_surface xdg_toplevel surfaces for non-child windows. Perform some minimal handling of the required initial xdg_surface configuration sequence to ensure we are able to safely attach buffers to the surface. --- dlls/winewayland.drv/Makefile.in | 4 +- dlls/winewayland.drv/wayland.c | 41 + dlls/winewayland.drv/wayland_surface.c | 197 ++++ dlls/winewayland.drv/waylanddrv.h | 27 + dlls/winewayland.drv/waylanddrv_main.c | 1 + dlls/winewayland.drv/window.c | 118 +++ dlls/winewayland.drv/xdg-shell.xml | 1351 ++++++++++++++++++++++++ 7 files changed, 1738 insertions(+), 1 deletion(-) create mode 100644 dlls/winewayland.drv/wayland_surface.c create mode 100644 dlls/winewayland.drv/xdg-shell.xml
diff --git a/dlls/winewayland.drv/Makefile.in b/dlls/winewayland.drv/Makefile.in index 454a7e5a4b4..9a682e7e007 100644 --- a/dlls/winewayland.drv/Makefile.in +++ b/dlls/winewayland.drv/Makefile.in @@ -9,6 +9,8 @@ SOURCES = \ version.rc \ wayland.c \ wayland_output.c \ + wayland_surface.c \ waylanddrv_main.c \ window.c \ - xdg-output-unstable-v1.xml + xdg-output-unstable-v1.xml \ + xdg-shell.xml diff --git a/dlls/winewayland.drv/wayland.c b/dlls/winewayland.drv/wayland.c index 34aa8bec04e..357dc4208d3 100644 --- a/dlls/winewayland.drv/wayland.c +++ b/dlls/winewayland.drv/wayland.c @@ -38,6 +38,21 @@ struct wayland process_wayland = .output_mutex = PTHREAD_MUTEX_INITIALIZER };
+/********************************************************************** + * xdg_wm_base handling + */ + +static void xdg_wm_base_handle_ping(void *data, struct xdg_wm_base *shell, + uint32_t serial) +{ + xdg_wm_base_pong(shell, serial); +} + +static const struct xdg_wm_base_listener xdg_wm_base_listener = +{ + xdg_wm_base_handle_ping +}; + /********************************************************************** * Registry handling */ @@ -65,6 +80,20 @@ static void registry_handle_global(void *data, struct wl_registry *registry, wl_list_for_each(output, &process_wayland.output_list, link) wayland_output_use_xdg_extension(output); } + else if (strcmp(interface, "wl_compositor") == 0) + { + process_wayland.wl_compositor = + wl_registry_bind(registry, id, &wl_compositor_interface, 4); + } + else if (strcmp(interface, "xdg_wm_base") == 0) + { + /* Bind version 2 so that compositors (e.g., sway) can properly send tiled + * states, instead of falling back to (ab)using the maximized state. */ + process_wayland.xdg_wm_base = + wl_registry_bind(registry, id, &xdg_wm_base_interface, + version < 2 ? version : 2); + xdg_wm_base_add_listener(process_wayland.xdg_wm_base, &xdg_wm_base_listener, NULL); + } }
static void registry_handle_global_remove(void *data, struct wl_registry *registry, @@ -136,6 +165,18 @@ BOOL wayland_process_init(void) wl_display_roundtrip_queue(process_wayland.wl_display, process_wayland.wl_event_queue); wl_display_roundtrip_queue(process_wayland.wl_display, process_wayland.wl_event_queue);
+ /* Check for required protocol globals. */ + if (!process_wayland.wl_compositor) + { + ERR("Wayland compositor doesn't support wl_compositor\n"); + return FALSE; + } + if (!process_wayland.xdg_wm_base) + { + ERR("Wayland compositor doesn't support xdg_wm_base\n"); + return FALSE; + } + wayland_init_display_devices(FALSE);
process_wayland.initialized = TRUE; diff --git a/dlls/winewayland.drv/wayland_surface.c b/dlls/winewayland.drv/wayland_surface.c new file mode 100644 index 00000000000..84181ae45f4 --- /dev/null +++ b/dlls/winewayland.drv/wayland_surface.c @@ -0,0 +1,197 @@ +/* + * Wayland surfaces + * + * Copyright 2020 Alexandros Frantzis for Collabora Ltd + * + * 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 2.1 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, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#if 0 +#pragma makedep unix +#endif + +#include "config.h" + +#include "waylanddrv.h" + +#include "wine/debug.h" + +#include <stdlib.h> + +WINE_DEFAULT_DEBUG_CHANNEL(waylanddrv); + +static void xdg_surface_handle_configure(void *data, struct xdg_surface *xdg_surface, + uint32_t serial) +{ + struct wayland_surface *surface = data; + BOOL initial_configure; + + TRACE("serial=%u\n", serial); + + pthread_mutex_lock(&surface->mutex); + /* Handle this event only if wayland_surface is still associated with + * the target xdg_surface. */ + if (surface->xdg_surface && surface->xdg_surface == xdg_surface) + { + initial_configure = surface->pending_serial == 0 && + surface->current_serial == 0; + surface->pending_serial = serial; + if (initial_configure) pthread_cond_signal(&surface->configured_cond); + } + pthread_mutex_unlock(&surface->mutex); +} + +static const struct xdg_surface_listener xdg_surface_listener = +{ + xdg_surface_handle_configure +}; + +/********************************************************************** + * wayland_surface_create + * + * Creates a role-less wayland surface. + */ +struct wayland_surface *wayland_surface_create(void) +{ + struct wayland_surface *surface; + + surface = calloc(1, sizeof(*surface)); + if (!surface) + { + ERR("Failed to allocate space for Wayland surface\n"); + goto err; + } + + TRACE("surface=%p\n", surface); + + pthread_mutex_init(&surface->mutex, NULL); + pthread_cond_init(&surface->configured_cond, NULL); + + surface->wl_surface = wl_compositor_create_surface(process_wayland.wl_compositor); + if (!surface->wl_surface) + { + ERR("Failed to create wl_surface Wayland surface\n"); + goto err; + } + + return surface; + +err: + if (surface) wayland_surface_destroy(surface); + return NULL; +} + +/********************************************************************** + * wayland_surface_destroy + * + * Destroys a wayland surface. + */ +void wayland_surface_destroy(struct wayland_surface *surface) +{ + pthread_mutex_lock(&surface->mutex); + + if (surface->xdg_toplevel) + { + xdg_toplevel_destroy(surface->xdg_toplevel); + surface->xdg_toplevel = NULL; + } + + if (surface->xdg_surface) + { + xdg_surface_destroy(surface->xdg_surface); + surface->xdg_surface = NULL; + } + + if (surface->wl_surface) + { + wl_surface_destroy(surface->wl_surface); + surface->wl_surface = NULL; + } + + pthread_mutex_unlock(&surface->mutex); + + wl_display_flush(process_wayland.wl_display); + + pthread_cond_destroy(&surface->configured_cond); + pthread_mutex_destroy(&surface->mutex); + + free(surface); +} + +/********************************************************************** + * wayland_surface_make_toplevel + * + * Gives the toplevel role to a plain wayland surface. + * + * Must be called under the surface lock. + */ +void wayland_surface_make_toplevel(struct wayland_surface *surface) +{ + TRACE("surface=%p\n", surface); + + surface->xdg_surface = + xdg_wm_base_get_xdg_surface(process_wayland.xdg_wm_base, surface->wl_surface); + if (!surface->xdg_surface) goto err; + xdg_surface_add_listener(surface->xdg_surface, &xdg_surface_listener, surface); + + surface->xdg_toplevel = xdg_surface_get_toplevel(surface->xdg_surface); + if (!surface->xdg_toplevel) goto err; + + wl_surface_commit(surface->wl_surface); + wl_display_flush(process_wayland.wl_display); + + /* Wait for the initial configure event */ + while (!surface->pending_serial) + pthread_cond_wait(&surface->configured_cond, &surface->mutex); + + return; + +err: + wayland_surface_clear_role(surface); + ERR("Failed to assign toplevel role to wayland surface\n"); +} + +/********************************************************************** + * wayland_surface_clear_role + * + * Clears the role related Wayland objects of a Wayland surface, making it a + * plain surface again. We can later assign the same role (but not a + * different one!) to the surface. + */ +void wayland_surface_clear_role(struct wayland_surface *surface) +{ + TRACE("surface=%p\n", surface); + + if (surface->xdg_toplevel) + { + xdg_toplevel_destroy(surface->xdg_toplevel); + surface->xdg_toplevel = NULL; + } + + if (surface->xdg_surface) + { + xdg_surface_destroy(surface->xdg_surface); + surface->xdg_surface = NULL; + } + + surface->pending_serial = 0; + surface->current_serial = 0; + + /* Ensure no buffer is attached, otherwise future role assignments may fail. */ + wl_surface_attach(surface->wl_surface, NULL, 0, 0); + wl_surface_commit(surface->wl_surface); + + wl_display_flush(process_wayland.wl_display); +} diff --git a/dlls/winewayland.drv/waylanddrv.h b/dlls/winewayland.drv/waylanddrv.h index ed1d3ea0be2..4c42dcd6268 100644 --- a/dlls/winewayland.drv/waylanddrv.h +++ b/dlls/winewayland.drv/waylanddrv.h @@ -28,6 +28,7 @@ #include <pthread.h> #include <wayland-client.h> #include "xdg-output-unstable-v1-client-protocol.h" +#include "xdg-shell-client-protocol.h"
#include "windef.h" #include "winbase.h" @@ -58,6 +59,8 @@ struct wayland struct wl_event_queue *wl_event_queue; struct wl_registry *wl_registry; struct zxdg_output_manager_v1 *zxdg_output_manager_v1; + struct wl_compositor *wl_compositor; + struct xdg_wm_base *xdg_wm_base; struct wl_list output_list; /* Protects the output_list and the wayland_output.current states. */ pthread_mutex_t output_mutex; @@ -91,6 +94,17 @@ struct wayland_output struct wayland_output_state current; };
+struct wayland_surface +{ + struct wl_surface *wl_surface; + struct xdg_surface *xdg_surface; + struct xdg_toplevel *xdg_toplevel; + pthread_mutex_t mutex; + pthread_cond_t configured_cond; + uint32_t pending_serial; + uint32_t current_serial; +}; + /********************************************************************** * Wayland initialization */ @@ -106,6 +120,15 @@ BOOL wayland_output_create(uint32_t id, uint32_t version) DECLSPEC_HIDDEN; void wayland_output_destroy(struct wayland_output *output) DECLSPEC_HIDDEN; void wayland_output_use_xdg_extension(struct wayland_output *output) DECLSPEC_HIDDEN;
+/********************************************************************** + * Wayland surface + */ + +struct wayland_surface *wayland_surface_create(void) DECLSPEC_HIDDEN; +void wayland_surface_destroy(struct wayland_surface *surface) DECLSPEC_HIDDEN; +void wayland_surface_make_toplevel(struct wayland_surface *surface) DECLSPEC_HIDDEN; +void wayland_surface_clear_role(struct wayland_surface *surface) DECLSPEC_HIDDEN; + /********************************************************************** * USER driver functions */ @@ -115,6 +138,10 @@ void WAYLAND_DestroyWindow(HWND hwnd) DECLSPEC_HIDDEN; BOOL WAYLAND_UpdateDisplayDevices(const struct gdi_device_manager *device_manager, BOOL force, void *param) DECLSPEC_HIDDEN; LRESULT WAYLAND_WindowMessage(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp) DECLSPEC_HIDDEN; +void WAYLAND_WindowPosChanged(HWND hwnd, HWND insert_after, UINT swp_flags, + const RECT *window_rect, const RECT *client_rect, + const RECT *visible_rect, const RECT *valid_rects, + struct window_surface *surface) DECLSPEC_HIDDEN; BOOL WAYLAND_WindowPosChanging(HWND hwnd, HWND insert_after, UINT swp_flags, const RECT *window_rect, const RECT *client_rect, RECT *visible_rect, struct window_surface **surface) DECLSPEC_HIDDEN; diff --git a/dlls/winewayland.drv/waylanddrv_main.c b/dlls/winewayland.drv/waylanddrv_main.c index 3ef03e16d0b..530cdd83d90 100644 --- a/dlls/winewayland.drv/waylanddrv_main.c +++ b/dlls/winewayland.drv/waylanddrv_main.c @@ -35,6 +35,7 @@ static const struct user_driver_funcs waylanddrv_funcs = .pDestroyWindow = WAYLAND_DestroyWindow, .pUpdateDisplayDevices = WAYLAND_UpdateDisplayDevices, .pWindowMessage = WAYLAND_WindowMessage, + .pWindowPosChanged = WAYLAND_WindowPosChanged, .pWindowPosChanging = WAYLAND_WindowPosChanging };
diff --git a/dlls/winewayland.drv/window.c b/dlls/winewayland.drv/window.c index 9eeaaea357d..fcdc6f0f69b 100644 --- a/dlls/winewayland.drv/window.c +++ b/dlls/winewayland.drv/window.c @@ -39,6 +39,14 @@ struct wayland_win_data struct rb_entry entry; /* hwnd that this private data belongs to */ HWND hwnd; + /* parent hwnd for child windows */ + HWND parent; + /* old parent hwnd for child windows */ + HWND old_parent; + /* wayland surface (if any) for this window */ + struct wayland_surface *wayland_surface; + /* whether this window is visible */ + BOOL visible; };
static int wayland_win_data_cmp_rb(const void *key, @@ -75,6 +83,7 @@ static struct wayland_win_data *wayland_win_data_create(HWND hwnd) if (!(data = calloc(1, sizeof(*data)))) return NULL;
data->hwnd = hwnd; + data->parent = (parent == NtUserGetDesktopWindow()) ? 0 : parent;
pthread_mutex_lock(&win_data_mutex);
@@ -103,6 +112,7 @@ static void wayland_win_data_destroy(struct wayland_win_data *data)
pthread_mutex_unlock(&win_data_mutex);
+ if (data->wayland_surface) wayland_surface_destroy(data->wayland_surface); free(data); }
@@ -136,6 +146,81 @@ static void wayland_win_data_release(struct wayland_win_data *data) pthread_mutex_unlock(&win_data_mutex); }
+static BOOL wayland_win_data_wayland_surface_needs_update(struct wayland_win_data *data) +{ + BOOL xdg_visible; + + /* If window child status changed, update the wayland surface. */ + if (!data->parent != !data->old_parent) return TRUE; + + /* Don't create wayland surfaces for child windows. */ + if (data->parent) return FALSE; + + /* Otherwise we want a surface if we don't have one. */ + if (!data->wayland_surface) return TRUE; + + /* If this is currently or potentially a toplevel surface, and its + * visibility state has changed, update it so that we have + * an xdg_toplevel iff the window is visible. */ + xdg_visible = data->wayland_surface->xdg_toplevel != NULL; + if (data->visible != xdg_visible) return TRUE; + + return FALSE; +} + +static void wayland_win_data_update_wayland_surface(struct wayland_win_data *data) +{ + struct wayland_surface *surface = data->wayland_surface; + + TRACE("hwnd=%p\n", data->hwnd); + + /* We don't want wayland surfaces for child windows. */ + if (data->parent) + { + if (surface) wayland_surface_destroy(surface); + data->wayland_surface = NULL; + return; + } + + if (!surface) + { + surface = wayland_surface_create(); + if (!surface) return; + pthread_mutex_lock(&surface->mutex); + } + else + { + pthread_mutex_lock(&surface->mutex); + wayland_surface_clear_role(surface); + } + + /* If the window is a visible toplevel make it a wayland + * xdg_toplevel. Otherwise keep it role-less to avoid polluting the + * compositor with empty xdg_toplevels. */ + if (data->visible) wayland_surface_make_toplevel(surface); + + pthread_mutex_unlock(&surface->mutex); + + data->wayland_surface = surface; +} + +static void wayland_win_data_update_wayland_surface_state(struct wayland_win_data *data) +{ + struct wayland_surface *surface = data->wayland_surface; + + if (surface->xdg_toplevel) + { + pthread_mutex_lock(&surface->mutex); + if (surface->pending_serial) + { + xdg_surface_ack_configure(surface->xdg_surface, surface->pending_serial); + surface->current_serial = surface->pending_serial; + surface->pending_serial = 0; + } + pthread_mutex_unlock(&surface->mutex); + } +} + /*********************************************************************** * WAYLAND_DestroyWindow */ @@ -157,6 +242,8 @@ BOOL WAYLAND_WindowPosChanging(HWND hwnd, HWND insert_after, UINT swp_flags, RECT *visible_rect, struct window_surface **surface) { struct wayland_win_data *data = wayland_win_data_get(hwnd); + DWORD style = NtUserGetWindowLongW(hwnd, GWL_STYLE); + HWND parent = NtUserGetAncestor(hwnd, GA_PARENT);
TRACE("hwnd %p window %s client %s visible %s after %p flags %08x\n", hwnd, wine_dbgstr_rect(window_rect), wine_dbgstr_rect(client_rect), @@ -164,11 +251,42 @@ BOOL WAYLAND_WindowPosChanging(HWND hwnd, HWND insert_after, UINT swp_flags,
if (!data && !(data = wayland_win_data_create(hwnd))) return TRUE;
+ data->old_parent = data->parent; + data->parent = (parent == NtUserGetDesktopWindow()) ? 0 : parent; + data->visible = ((style & WS_VISIBLE) == WS_VISIBLE || + (swp_flags & SWP_SHOWWINDOW)) && + !(swp_flags & SWP_HIDEWINDOW); + wayland_win_data_release(data);
return TRUE; }
+/*********************************************************************** + * WAYLAND_WindowPosChanged + */ +void WAYLAND_WindowPosChanged(HWND hwnd, HWND insert_after, UINT swp_flags, + const RECT *window_rect, const RECT *client_rect, + const RECT *visible_rect, const RECT *valid_rects, + struct window_surface *surface) +{ + struct wayland_win_data *data = wayland_win_data_get(hwnd); + + TRACE("hwnd %p window %s client %s visible %s after %p flags %08x\n", + hwnd, wine_dbgstr_rect(window_rect), wine_dbgstr_rect(client_rect), + wine_dbgstr_rect(visible_rect), insert_after, swp_flags); + + if (!data) return; + + if (wayland_win_data_wayland_surface_needs_update(data)) + wayland_win_data_update_wayland_surface(data); + + if (data->wayland_surface) + wayland_win_data_update_wayland_surface_state(data); + + wayland_win_data_release(data); +} + static void wayland_resize_desktop(void) { RECT virtual_rect = NtUserGetVirtualScreenRect(); diff --git a/dlls/winewayland.drv/xdg-shell.xml b/dlls/winewayland.drv/xdg-shell.xml new file mode 100644 index 00000000000..6eb0a67c5d8 --- /dev/null +++ b/dlls/winewayland.drv/xdg-shell.xml @@ -0,0 +1,1351 @@ +<?xml version="1.0" encoding="UTF-8"?> +<protocol name="xdg_shell"> + + <copyright> + Copyright © 2008-2013 Kristian Høgsberg + Copyright © 2013 Rafael Antognolli + Copyright © 2013 Jasper St. Pierre + Copyright © 2010-2013 Intel Corporation + Copyright © 2015-2017 Samsung Electronics Co., Ltd + Copyright © 2015-2017 Red Hat Inc. + + Permission is hereby granted, free of charge, to any person obtaining a + copy of this software and associated documentation files (the "Software"), + to deal in the Software without restriction, including without limitation + the rights to use, copy, modify, merge, publish, distribute, sublicense, + and/or sell copies of the Software, and to permit persons to whom the + Software is furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice (including the next + paragraph) shall be included in all copies or substantial portions of the + Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + DEALINGS IN THE SOFTWARE. + </copyright> + + <interface name="xdg_wm_base" version="5"> + <description summary="create desktop-style surfaces"> + The xdg_wm_base interface is exposed as a global object enabling clients + to turn their wl_surfaces into windows in a desktop environment. It + defines the basic functionality needed for clients and the compositor to + create windows that can be dragged, resized, maximized, etc, as well as + creating transient windows such as popup menus. + </description> + + <enum name="error"> + <entry name="role" value="0" summary="given wl_surface has another role"/> + <entry name="defunct_surfaces" value="1" + summary="xdg_wm_base was destroyed before children"/> + <entry name="not_the_topmost_popup" value="2" + summary="the client tried to map or destroy a non-topmost popup"/> + <entry name="invalid_popup_parent" value="3" + summary="the client specified an invalid popup parent surface"/> + <entry name="invalid_surface_state" value="4" + summary="the client provided an invalid surface state"/> + <entry name="invalid_positioner" value="5" + summary="the client provided an invalid positioner"/> + <entry name="unresponsive" value="6" + summary="the client didn’t respond to a ping event in time"/> + </enum> + + <request name="destroy" type="destructor"> + <description summary="destroy xdg_wm_base"> + Destroy this xdg_wm_base object. + + Destroying a bound xdg_wm_base object while there are surfaces + still alive created by this xdg_wm_base object instance is illegal + and will result in a defunct_surfaces error. + </description> + </request> + + <request name="create_positioner"> + <description summary="create a positioner object"> + Create a positioner object. A positioner object is used to position + surfaces relative to some parent surface. See the interface description + and xdg_surface.get_popup for details. + </description> + <arg name="id" type="new_id" interface="xdg_positioner"/> + </request> + + <request name="get_xdg_surface"> + <description summary="create a shell surface from a surface"> + This creates an xdg_surface for the given surface. While xdg_surface + itself is not a role, the corresponding surface may only be assigned + a role extending xdg_surface, such as xdg_toplevel or xdg_popup. It is + illegal to create an xdg_surface for a wl_surface which already has an + assigned role and this will result in a role error. + + This creates an xdg_surface for the given surface. An xdg_surface is + used as basis to define a role to a given surface, such as xdg_toplevel + or xdg_popup. It also manages functionality shared between xdg_surface + based surface roles. + + See the documentation of xdg_surface for more details about what an + xdg_surface is and how it is used. + </description> + <arg name="id" type="new_id" interface="xdg_surface"/> + <arg name="surface" type="object" interface="wl_surface"/> + </request> + + <request name="pong"> + <description summary="respond to a ping event"> + A client must respond to a ping event with a pong request or + the client may be deemed unresponsive. See xdg_wm_base.ping + and xdg_wm_base.error.unresponsive. + </description> + <arg name="serial" type="uint" summary="serial of the ping event"/> + </request> + + <event name="ping"> + <description summary="check if the client is alive"> + The ping event asks the client if it's still alive. Pass the + serial specified in the event back to the compositor by sending + a "pong" request back with the specified serial. See xdg_wm_base.pong. + + Compositors can use this to determine if the client is still + alive. It's unspecified what will happen if the client doesn't + respond to the ping request, or in what timeframe. Clients should + try to respond in a reasonable amount of time. The “unresponsive” + error is provided for compositors that wish to disconnect unresponsive + clients. + + A compositor is free to ping in any way it wants, but a client must + always respond to any xdg_wm_base object it created. + </description> + <arg name="serial" type="uint" summary="pass this to the pong request"/> + </event> + </interface> + + <interface name="xdg_positioner" version="5"> + <description summary="child surface positioner"> + The xdg_positioner provides a collection of rules for the placement of a + child surface relative to a parent surface. Rules can be defined to ensure + the child surface remains within the visible area's borders, and to + specify how the child surface changes its position, such as sliding along + an axis, or flipping around a rectangle. These positioner-created rules are + constrained by the requirement that a child surface must intersect with or + be at least partially adjacent to its parent surface. + + See the various requests for details about possible rules. + + At the time of the request, the compositor makes a copy of the rules + specified by the xdg_positioner. Thus, after the request is complete the + xdg_positioner object can be destroyed or reused; further changes to the + object will have no effect on previous usages. + + For an xdg_positioner object to be considered complete, it must have a + non-zero size set by set_size, and a non-zero anchor rectangle set by + set_anchor_rect. Passing an incomplete xdg_positioner object when + positioning a surface raises an invalid_positioner error. + </description> + + <enum name="error"> + <entry name="invalid_input" value="0" summary="invalid input provided"/> + </enum> + + <request name="destroy" type="destructor"> + <description summary="destroy the xdg_positioner object"> + Notify the compositor that the xdg_positioner will no longer be used. + </description> + </request> + + <request name="set_size"> + <description summary="set the size of the to-be positioned rectangle"> + Set the size of the surface that is to be positioned with the positioner + object. The size is in surface-local coordinates and corresponds to the + window geometry. See xdg_surface.set_window_geometry. + + If a zero or negative size is set the invalid_input error is raised. + </description> + <arg name="width" type="int" summary="width of positioned rectangle"/> + <arg name="height" type="int" summary="height of positioned rectangle"/> + </request> + + <request name="set_anchor_rect"> + <description summary="set the anchor rectangle within the parent surface"> + Specify the anchor rectangle within the parent surface that the child + surface will be placed relative to. The rectangle is relative to the + window geometry as defined by xdg_surface.set_window_geometry of the + parent surface. + + When the xdg_positioner object is used to position a child surface, the + anchor rectangle may not extend outside the window geometry of the + positioned child's parent surface. + + If a negative size is set the invalid_input error is raised. + </description> + <arg name="x" type="int" summary="x position of anchor rectangle"/> + <arg name="y" type="int" summary="y position of anchor rectangle"/> + <arg name="width" type="int" summary="width of anchor rectangle"/> + <arg name="height" type="int" summary="height of anchor rectangle"/> + </request> + + <enum name="anchor"> + <entry name="none" value="0"/> + <entry name="top" value="1"/> + <entry name="bottom" value="2"/> + <entry name="left" value="3"/> + <entry name="right" value="4"/> + <entry name="top_left" value="5"/> + <entry name="bottom_left" value="6"/> + <entry name="top_right" value="7"/> + <entry name="bottom_right" value="8"/> + </enum> + + <request name="set_anchor"> + <description summary="set anchor rectangle anchor"> + Defines the anchor point for the anchor rectangle. The specified anchor + is used derive an anchor point that the child surface will be + positioned relative to. If a corner anchor is set (e.g. 'top_left' or + 'bottom_right'), the anchor point will be at the specified corner; + otherwise, the derived anchor point will be centered on the specified + edge, or in the center of the anchor rectangle if no edge is specified. + </description> + <arg name="anchor" type="uint" enum="anchor" + summary="anchor"/> + </request> + + <enum name="gravity"> + <entry name="none" value="0"/> + <entry name="top" value="1"/> + <entry name="bottom" value="2"/> + <entry name="left" value="3"/> + <entry name="right" value="4"/> + <entry name="top_left" value="5"/> + <entry name="bottom_left" value="6"/> + <entry name="top_right" value="7"/> + <entry name="bottom_right" value="8"/> + </enum> + + <request name="set_gravity"> + <description summary="set child surface gravity"> + Defines in what direction a surface should be positioned, relative to + the anchor point of the parent surface. If a corner gravity is + specified (e.g. 'bottom_right' or 'top_left'), then the child surface + will be placed towards the specified gravity; otherwise, the child + surface will be centered over the anchor point on any axis that had no + gravity specified. If the gravity is not in the ‘gravity’ enum, an + invalid_input error is raised. + </description> + <arg name="gravity" type="uint" enum="gravity" + summary="gravity direction"/> + </request> + + <enum name="constraint_adjustment" bitfield="true"> + <description summary="constraint adjustments"> + The constraint adjustment value define ways the compositor will adjust + the position of the surface, if the unadjusted position would result + in the surface being partly constrained. + + Whether a surface is considered 'constrained' is left to the compositor + to determine. For example, the surface may be partly outside the + compositor's defined 'work area', thus necessitating the child surface's + position be adjusted until it is entirely inside the work area. + + The adjustments can be combined, according to a defined precedence: 1) + Flip, 2) Slide, 3) Resize. + </description> + <entry name="none" value="0"> + <description summary="don't move the child surface when constrained"> + Don't alter the surface position even if it is constrained on some + axis, for example partially outside the edge of an output. + </description> + </entry> + <entry name="slide_x" value="1"> + <description summary="move along the x axis until unconstrained"> + Slide the surface along the x axis until it is no longer constrained. + + First try to slide towards the direction of the gravity on the x axis + until either the edge in the opposite direction of the gravity is + unconstrained or the edge in the direction of the gravity is + constrained. + + Then try to slide towards the opposite direction of the gravity on the + x axis until either the edge in the direction of the gravity is + unconstrained or the edge in the opposite direction of the gravity is + constrained. + </description> + </entry> + <entry name="slide_y" value="2"> + <description summary="move along the y axis until unconstrained"> + Slide the surface along the y axis until it is no longer constrained. + + First try to slide towards the direction of the gravity on the y axis + until either the edge in the opposite direction of the gravity is + unconstrained or the edge in the direction of the gravity is + constrained. + + Then try to slide towards the opposite direction of the gravity on the + y axis until either the edge in the direction of the gravity is + unconstrained or the edge in the opposite direction of the gravity is + constrained. + </description> + </entry> + <entry name="flip_x" value="4"> + <description summary="invert the anchor and gravity on the x axis"> + Invert the anchor and gravity on the x axis if the surface is + constrained on the x axis. For example, if the left edge of the + surface is constrained, the gravity is 'left' and the anchor is + 'left', change the gravity to 'right' and the anchor to 'right'. + + If the adjusted position also ends up being constrained, the resulting + position of the flip_x adjustment will be the one before the + adjustment. + </description> + </entry> + <entry name="flip_y" value="8"> + <description summary="invert the anchor and gravity on the y axis"> + Invert the anchor and gravity on the y axis if the surface is + constrained on the y axis. For example, if the bottom edge of the + surface is constrained, the gravity is 'bottom' and the anchor is + 'bottom', change the gravity to 'top' and the anchor to 'top'. + + The adjusted position is calculated given the original anchor + rectangle and offset, but with the new flipped anchor and gravity + values. + + If the adjusted position also ends up being constrained, the resulting + position of the flip_y adjustment will be the one before the + adjustment. + </description> + </entry> + <entry name="resize_x" value="16"> + <description summary="horizontally resize the surface"> + Resize the surface horizontally so that it is completely + unconstrained. + </description> + </entry> + <entry name="resize_y" value="32"> + <description summary="vertically resize the surface"> + Resize the surface vertically so that it is completely unconstrained. + </description> + </entry> + </enum> + + <request name="set_constraint_adjustment"> + <description summary="set the adjustment to be done when constrained"> + Specify how the window should be positioned if the originally intended + position caused the surface to be constrained, meaning at least + partially outside positioning boundaries set by the compositor. The + adjustment is set by constructing a bitmask describing the adjustment to + be made when the surface is constrained on that axis. + + If no bit for one axis is set, the compositor will assume that the child + surface should not change its position on that axis when constrained. + + If more than one bit for one axis is set, the order of how adjustments + are applied is specified in the corresponding adjustment descriptions. + + The default adjustment is none. + </description> + <arg name="constraint_adjustment" type="uint" + summary="bit mask of constraint adjustments"/> + </request> + + <request name="set_offset"> + <description summary="set surface position offset"> + Specify the surface position offset relative to the position of the + anchor on the anchor rectangle and the anchor on the surface. For + example if the anchor of the anchor rectangle is at (x, y), the surface + has the gravity bottom|right, and the offset is (ox, oy), the calculated + surface position will be (x + ox, y + oy). The offset position of the + surface is the one used for constraint testing. See + set_constraint_adjustment. + + An example use case is placing a popup menu on top of a user interface + element, while aligning the user interface element of the parent surface + with some user interface element placed somewhere in the popup surface. + </description> + <arg name="x" type="int" summary="surface position x offset"/> + <arg name="y" type="int" summary="surface position y offset"/> + </request> + + <!-- Version 3 additions --> + + <request name="set_reactive" since="3"> + <description summary="continuously reconstrain the surface"> + When set reactive, the surface is reconstrained if the conditions used + for constraining changed, e.g. the parent window moved. + + If the conditions changed and the popup was reconstrained, an + xdg_popup.configure event is sent with updated geometry, followed by an + xdg_surface.configure event. + </description> + </request> + + <request name="set_parent_size" since="3"> + <description summary=""> + Set the parent window geometry the compositor should use when + positioning the popup. The compositor may use this information to + determine the future state the popup should be constrained using. If + this doesn't match the dimension of the parent the popup is eventually + positioned against, the behavior is undefined. + + The arguments are given in the surface-local coordinate space. + </description> + <arg name="parent_width" type="int" + summary="future window geometry width of parent"/> + <arg name="parent_height" type="int" + summary="future window geometry height of parent"/> + </request> + + <request name="set_parent_configure" since="3"> + <description summary="set parent configure this is a response to"> + Set the serial of an xdg_surface.configure event this positioner will be + used in response to. The compositor may use this information together + with set_parent_size to determine what future state the popup should be + constrained using. + </description> + <arg name="serial" type="uint" + summary="serial of parent configure event"/> + </request> + </interface> + + <interface name="xdg_surface" version="5"> + <description summary="desktop user interface surface base interface"> + An interface that may be implemented by a wl_surface, for + implementations that provide a desktop-style user interface. + + It provides a base set of functionality required to construct user + interface elements requiring management by the compositor, such as + toplevel windows, menus, etc. The types of functionality are split into + xdg_surface roles. + + Creating an xdg_surface does not set the role for a wl_surface. In order + to map an xdg_surface, the client must create a role-specific object + using, e.g., get_toplevel, get_popup. The wl_surface for any given + xdg_surface can have at most one role, and may not be assigned any role + not based on xdg_surface. + + A role must be assigned before any other requests are made to the + xdg_surface object. + + The client must call wl_surface.commit on the corresponding wl_surface + for the xdg_surface state to take effect. + + Creating an xdg_surface from a wl_surface which has a buffer attached or + committed is a client error, and any attempts by a client to attach or + manipulate a buffer prior to the first xdg_surface.configure call must + also be treated as errors. + + After creating a role-specific object and setting it up, the client must + perform an initial commit without any buffer attached. The compositor + will reply with an xdg_surface.configure event. The client must + acknowledge it and is then allowed to attach a buffer to map the surface. + + Mapping an xdg_surface-based role surface is defined as making it + possible for the surface to be shown by the compositor. Note that + a mapped surface is not guaranteed to be visible once it is mapped. + + For an xdg_surface to be mapped by the compositor, the following + conditions must be met: + (1) the client has assigned an xdg_surface-based role to the surface + (2) the client has set and committed the xdg_surface state and the + role-dependent state to the surface + (3) the client has committed a buffer to the surface + + A newly-unmapped surface is considered to have met condition (1) out + of the 3 required conditions for mapping a surface if its role surface + has not been destroyed, i.e. the client must perform the initial commit + again before attaching a buffer. + </description> + + <enum name="error"> + <entry name="not_constructed" value="1" + summary="Surface was not fully constructed"/> + <entry name="already_constructed" value="2" + summary="Surface was already constructed"/> + <entry name="unconfigured_buffer" value="3" + summary="Attaching a buffer to an unconfigured surface"/> + <entry name="invalid_serial" value="4" + summary="Invalid serial number when acking a configure event"/> + <entry name="invalid_size" value="5" + summary="Width or height was zero or negative"/> + <entry name="defunct_role_object" value="6" + summary="Surface was destroyed before its role object"/> + </enum> + + <request name="destroy" type="destructor"> + <description summary="destroy the xdg_surface"> + Destroy the xdg_surface object. An xdg_surface must only be destroyed + after its role object has been destroyed, otherwise + a defunct_role_object error is raised. + </description> + </request> + + <request name="get_toplevel"> + <description summary="assign the xdg_toplevel surface role"> + This creates an xdg_toplevel object for the given xdg_surface and gives + the associated wl_surface the xdg_toplevel role. + + See the documentation of xdg_toplevel for more details about what an + xdg_toplevel is and how it is used. + </description> + <arg name="id" type="new_id" interface="xdg_toplevel"/> + </request> + + <request name="get_popup"> + <description summary="assign the xdg_popup surface role"> + This creates an xdg_popup object for the given xdg_surface and gives + the associated wl_surface the xdg_popup role. + + If null is passed as a parent, a parent surface must be specified using + some other protocol, before committing the initial state. + + See the documentation of xdg_popup for more details about what an + xdg_popup is and how it is used. + </description> + <arg name="id" type="new_id" interface="xdg_popup"/> + <arg name="parent" type="object" interface="xdg_surface" allow-null="true"/> + <arg name="positioner" type="object" interface="xdg_positioner"/> + </request> + + <request name="set_window_geometry"> + <description summary="set the new window geometry"> + The window geometry of a surface is its "visible bounds" from the + user's perspective. Client-side decorations often have invisible + portions like drop-shadows which should be ignored for the + purposes of aligning, placing and constraining windows. + + The window geometry is double buffered, and will be applied at the + time wl_surface.commit of the corresponding wl_surface is called. + + When maintaining a position, the compositor should treat the (x, y) + coordinate of the window geometry as the top left corner of the window. + A client changing the (x, y) window geometry coordinate should in + general not alter the position of the window. + + Once the window geometry of the surface is set, it is not possible to + unset it, and it will remain the same until set_window_geometry is + called again, even if a new subsurface or buffer is attached. + + If never set, the value is the full bounds of the surface, + including any subsurfaces. This updates dynamically on every + commit. This unset is meant for extremely simple clients. + + The arguments are given in the surface-local coordinate space of + the wl_surface associated with this xdg_surface. + + The width and height must be greater than zero. Setting an invalid size + will raise an invalid_size error. When applied, the effective window + geometry will be the set window geometry clamped to the bounding + rectangle of the combined geometry of the surface of the xdg_surface and + the associated subsurfaces. + </description> + <arg name="x" type="int"/> + <arg name="y" type="int"/> + <arg name="width" type="int"/> + <arg name="height" type="int"/> + </request> + + <request name="ack_configure"> + <description summary="ack a configure event"> + When a configure event is received, if a client commits the + surface in response to the configure event, then the client + must make an ack_configure request sometime before the commit + request, passing along the serial of the configure event. + + For instance, for toplevel surfaces the compositor might use this + information to move a surface to the top left only when the client has + drawn itself for the maximized or fullscreen state. + + If the client receives multiple configure events before it + can respond to one, it only has to ack the last configure event. + Acking a configure event that was never sent raises an invalid_serial + error. + + A client is not required to commit immediately after sending + an ack_configure request - it may even ack_configure several times + before its next surface commit. + + A client may send multiple ack_configure requests before committing, but + only the last request sent before a commit indicates which configure + event the client really is responding to. + + Sending an ack_configure request consumes the serial number sent with + the request, as well as serial numbers sent by all configure events + sent on this xdg_surface prior to the configure event referenced by + the committed serial. + + It is an error to issue multiple ack_configure requests referencing a + serial from the same configure event, or to issue an ack_configure + request referencing a serial from a configure event issued before the + event identified by the last ack_configure request for the same + xdg_surface. Doing so will raise an invalid_serial error. + </description> + <arg name="serial" type="uint" summary="the serial from the configure event"/> + </request> + + <event name="configure"> + <description summary="suggest a surface change"> + The configure event marks the end of a configure sequence. A configure + sequence is a set of one or more events configuring the state of the + xdg_surface, including the final xdg_surface.configure event. + + Where applicable, xdg_surface surface roles will during a configure + sequence extend this event as a latched state sent as events before the + xdg_surface.configure event. Such events should be considered to make up + a set of atomically applied configuration states, where the + xdg_surface.configure commits the accumulated state. + + Clients should arrange their surface for the new states, and then send + an ack_configure request with the serial sent in this configure event at + some point before committing the new surface. + + If the client receives multiple configure events before it can respond + to one, it is free to discard all but the last event it received. + </description> + <arg name="serial" type="uint" summary="serial of the configure event"/> + </event> + + </interface> + + <interface name="xdg_toplevel" version="5"> + <description summary="toplevel surface"> + This interface defines an xdg_surface role which allows a surface to, + among other things, set window-like properties such as maximize, + fullscreen, and minimize, set application-specific metadata like title and + id, and well as trigger user interactive operations such as interactive + resize and move. + + Unmapping an xdg_toplevel means that the surface cannot be shown + by the compositor until it is explicitly mapped again. + All active operations (e.g., move, resize) are canceled and all + attributes (e.g. title, state, stacking, ...) are discarded for + an xdg_toplevel surface when it is unmapped. The xdg_toplevel returns to + the state it had right after xdg_surface.get_toplevel. The client + can re-map the toplevel by perfoming a commit without any buffer + attached, waiting for a configure event and handling it as usual (see + xdg_surface description). + + Attaching a null buffer to a toplevel unmaps the surface. + </description> + + <request name="destroy" type="destructor"> + <description summary="destroy the xdg_toplevel"> + This request destroys the role surface and unmaps the surface; + see "Unmapping" behavior in interface section for details. + </description> + </request> + + <enum name="error"> + <entry name="invalid_resize_edge" value="0" summary="provided value is + not a valid variant of the resize_edge enum"/> + <entry name="invalid_parent" value="1" + summary="invalid parent toplevel"/> + <entry name="invalid_size" value="2" + summary="client provided an invalid min or max size"/> + </enum> + + <request name="set_parent"> + <description summary="set the parent of this surface"> + Set the "parent" of this surface. This surface should be stacked + above the parent surface and all other ancestor surfaces. + + Parent surfaces should be set on dialogs, toolboxes, or other + "auxiliary" surfaces, so that the parent is raised when the dialog + is raised. + + Setting a null parent for a child surface unsets its parent. Setting + a null parent for a surface which currently has no parent is a no-op. + + Only mapped surfaces can have child surfaces. Setting a parent which + is not mapped is equivalent to setting a null parent. If a surface + becomes unmapped, its children's parent is set to the parent of + the now-unmapped surface. If the now-unmapped surface has no parent, + its children's parent is unset. If the now-unmapped surface becomes + mapped again, its parent-child relationship is not restored. + + The parent toplevel must not be one of the child toplevel's + descendants, and the parent must be different from the child toplevel, + otherwise the invalid_parent protocol error is raised. + </description> + <arg name="parent" type="object" interface="xdg_toplevel" allow-null="true"/> + </request> + + <request name="set_title"> + <description summary="set surface title"> + Set a short title for the surface. + + This string may be used to identify the surface in a task bar, + window list, or other user interface elements provided by the + compositor. + + The string must be encoded in UTF-8. + </description> + <arg name="title" type="string"/> + </request> + + <request name="set_app_id"> + <description summary="set application ID"> + Set an application identifier for the surface. + + The app ID identifies the general class of applications to which + the surface belongs. The compositor can use this to group multiple + surfaces together, or to determine how to launch a new application. + + For D-Bus activatable applications, the app ID is used as the D-Bus + service name. + + The compositor shell will try to group application surfaces together + by their app ID. As a best practice, it is suggested to select app + ID's that match the basename of the application's .desktop file. + For example, "org.freedesktop.FooViewer" where the .desktop file is + "org.freedesktop.FooViewer.desktop". + + Like other properties, a set_app_id request can be sent after the + xdg_toplevel has been mapped to update the property. + + See the desktop-entry specification [0] for more details on + application identifiers and how they relate to well-known D-Bus + names and .desktop files. + + [0] https://standards.freedesktop.org/desktop-entry-spec/ + </description> + <arg name="app_id" type="string"/> + </request> + + <request name="show_window_menu"> + <description summary="show the window menu"> + Clients implementing client-side decorations might want to show + a context menu when right-clicking on the decorations, giving the + user a menu that they can use to maximize or minimize the window. + + This request asks the compositor to pop up such a window menu at + the given position, relative to the local surface coordinates of + the parent surface. There are no guarantees as to what menu items + the window menu contains, or even if a window menu will be drawn + at all. + + This request must be used in response to some sort of user action + like a button press, key press, or touch down event. + </description> + <arg name="seat" type="object" interface="wl_seat" summary="the wl_seat of the user event"/> + <arg name="serial" type="uint" summary="the serial of the user event"/> + <arg name="x" type="int" summary="the x position to pop up the window menu at"/> + <arg name="y" type="int" summary="the y position to pop up the window menu at"/> + </request> + + <request name="move"> + <description summary="start an interactive move"> + Start an interactive, user-driven move of the surface. + + This request must be used in response to some sort of user action + like a button press, key press, or touch down event. The passed + serial is used to determine the type of interactive move (touch, + pointer, etc). + + The server may ignore move requests depending on the state of + the surface (e.g. fullscreen or maximized), or if the passed serial + is no longer valid. + + If triggered, the surface will lose the focus of the device + (wl_pointer, wl_touch, etc) used for the move. It is up to the + compositor to visually indicate that the move is taking place, such as + updating a pointer cursor, during the move. There is no guarantee + that the device focus will return when the move is completed. + </description> + <arg name="seat" type="object" interface="wl_seat" summary="the wl_seat of the user event"/> + <arg name="serial" type="uint" summary="the serial of the user event"/> + </request> + + <enum name="resize_edge"> + <description summary="edge values for resizing"> + These values are used to indicate which edge of a surface + is being dragged in a resize operation. + </description> + <entry name="none" value="0"/> + <entry name="top" value="1"/> + <entry name="bottom" value="2"/> + <entry name="left" value="4"/> + <entry name="top_left" value="5"/> + <entry name="bottom_left" value="6"/> + <entry name="right" value="8"/> + <entry name="top_right" value="9"/> + <entry name="bottom_right" value="10"/> + </enum> + + <request name="resize"> + <description summary="start an interactive resize"> + Start a user-driven, interactive resize of the surface. + + This request must be used in response to some sort of user action + like a button press, key press, or touch down event. The passed + serial is used to determine the type of interactive resize (touch, + pointer, etc). + + The server may ignore resize requests depending on the state of + the surface (e.g. fullscreen or maximized). + + If triggered, the client will receive configure events with the + "resize" state enum value and the expected sizes. See the "resize" + enum value for more details about what is required. The client + must also acknowledge configure events using "ack_configure". After + the resize is completed, the client will receive another "configure" + event without the resize state. + + If triggered, the surface also will lose the focus of the device + (wl_pointer, wl_touch, etc) used for the resize. It is up to the + compositor to visually indicate that the resize is taking place, + such as updating a pointer cursor, during the resize. There is no + guarantee that the device focus will return when the resize is + completed. + + The edges parameter specifies how the surface should be resized, and + is one of the values of the resize_edge enum. Values not matching + a variant of the enum will cause a protocol error. The compositor + may use this information to update the surface position for example + when dragging the top left corner. The compositor may also use + this information to adapt its behavior, e.g. choose an appropriate + cursor image. + </description> + <arg name="seat" type="object" interface="wl_seat" summary="the wl_seat of the user event"/> + <arg name="serial" type="uint" summary="the serial of the user event"/> + <arg name="edges" type="uint" enum="resize_edge" summary="which edge or corner is being dragged"/> + </request> + + <enum name="state"> + <description summary="types of state on the surface"> + The different state values used on the surface. This is designed for + state values like maximized, fullscreen. It is paired with the + configure event to ensure that both the client and the compositor + setting the state can be synchronized. + + States set in this way are double-buffered. They will get applied on + the next commit. + </description> + <entry name="maximized" value="1" summary="the surface is maximized"> + <description summary="the surface is maximized"> + The surface is maximized. The window geometry specified in the configure + event must be obeyed by the client. + + The client should draw without shadow or other + decoration outside of the window geometry. + </description> + </entry> + <entry name="fullscreen" value="2" summary="the surface is fullscreen"> + <description summary="the surface is fullscreen"> + The surface is fullscreen. The window geometry specified in the + configure event is a maximum; the client cannot resize beyond it. For + a surface to cover the whole fullscreened area, the geometry + dimensions must be obeyed by the client. For more details, see + xdg_toplevel.set_fullscreen. + </description> + </entry> + <entry name="resizing" value="3" summary="the surface is being resized"> + <description summary="the surface is being resized"> + The surface is being resized. The window geometry specified in the + configure event is a maximum; the client cannot resize beyond it. + Clients that have aspect ratio or cell sizing configuration can use + a smaller size, however. + </description> + </entry> + <entry name="activated" value="4" summary="the surface is now activated"> + <description summary="the surface is now activated"> + Client window decorations should be painted as if the window is + active. Do not assume this means that the window actually has + keyboard or pointer focus. + </description> + </entry> + <entry name="tiled_left" value="5" since="2"> + <description summary="the surface’s left edge is tiled"> + The window is currently in a tiled layout and the left edge is + considered to be adjacent to another part of the tiling grid. + </description> + </entry> + <entry name="tiled_right" value="6" since="2"> + <description summary="the surface’s right edge is tiled"> + The window is currently in a tiled layout and the right edge is + considered to be adjacent to another part of the tiling grid. + </description> + </entry> + <entry name="tiled_top" value="7" since="2"> + <description summary="the surface’s top edge is tiled"> + The window is currently in a tiled layout and the top edge is + considered to be adjacent to another part of the tiling grid. + </description> + </entry> + <entry name="tiled_bottom" value="8" since="2"> + <description summary="the surface’s bottom edge is tiled"> + The window is currently in a tiled layout and the bottom edge is + considered to be adjacent to another part of the tiling grid. + </description> + </entry> + </enum> + + <request name="set_max_size"> + <description summary="set the maximum size"> + Set a maximum size for the window. + + The client can specify a maximum size so that the compositor does + not try to configure the window beyond this size. + + The width and height arguments are in window geometry coordinates. + See xdg_surface.set_window_geometry. + + Values set in this way are double-buffered. They will get applied + on the next commit. + + The compositor can use this information to allow or disallow + different states like maximize or fullscreen and draw accurate + animations. + + Similarly, a tiling window manager may use this information to + place and resize client windows in a more effective way. + + The client should not rely on the compositor to obey the maximum + size. The compositor may decide to ignore the values set by the + client and request a larger size. + + If never set, or a value of zero in the request, means that the + client has no expected maximum size in the given dimension. + As a result, a client wishing to reset the maximum size + to an unspecified state can use zero for width and height in the + request. + + Requesting a maximum size to be smaller than the minimum size of + a surface is illegal and will result in an invalid_size error. + + The width and height must be greater than or equal to zero. Using + strictly negative values for width or height will result in a + invalid_size error. + </description> + <arg name="width" type="int"/> + <arg name="height" type="int"/> + </request> + + <request name="set_min_size"> + <description summary="set the minimum size"> + Set a minimum size for the window. + + The client can specify a minimum size so that the compositor does + not try to configure the window below this size. + + The width and height arguments are in window geometry coordinates. + See xdg_surface.set_window_geometry. + + Values set in this way are double-buffered. They will get applied + on the next commit. + + The compositor can use this information to allow or disallow + different states like maximize or fullscreen and draw accurate + animations. + + Similarly, a tiling window manager may use this information to + place and resize client windows in a more effective way. + + The client should not rely on the compositor to obey the minimum + size. The compositor may decide to ignore the values set by the + client and request a smaller size. + + If never set, or a value of zero in the request, means that the + client has no expected minimum size in the given dimension. + As a result, a client wishing to reset the minimum size + to an unspecified state can use zero for width and height in the + request. + + Requesting a minimum size to be larger than the maximum size of + a surface is illegal and will result in an invalid_size error. + + The width and height must be greater than or equal to zero. Using + strictly negative values for width and height will result in a + invalid_size error. + </description> + <arg name="width" type="int"/> + <arg name="height" type="int"/> + </request> + + <request name="set_maximized"> + <description summary="maximize the window"> + Maximize the surface. + + After requesting that the surface should be maximized, the compositor + will respond by emitting a configure event. Whether this configure + actually sets the window maximized is subject to compositor policies. + The client must then update its content, drawing in the configured + state. The client must also acknowledge the configure when committing + the new content (see ack_configure). + + It is up to the compositor to decide how and where to maximize the + surface, for example which output and what region of the screen should + be used. + + If the surface was already maximized, the compositor will still emit + a configure event with the "maximized" state. + + If the surface is in a fullscreen state, this request has no direct + effect. It may alter the state the surface is returned to when + unmaximized unless overridden by the compositor. + </description> + </request> + + <request name="unset_maximized"> + <description summary="unmaximize the window"> + Unmaximize the surface. + + After requesting that the surface should be unmaximized, the compositor + will respond by emitting a configure event. Whether this actually + un-maximizes the window is subject to compositor policies. + If available and applicable, the compositor will include the window + geometry dimensions the window had prior to being maximized in the + configure event. The client must then update its content, drawing it in + the configured state. The client must also acknowledge the configure + when committing the new content (see ack_configure). + + It is up to the compositor to position the surface after it was + unmaximized; usually the position the surface had before maximizing, if + applicable. + + If the surface was already not maximized, the compositor will still + emit a configure event without the "maximized" state. + + If the surface is in a fullscreen state, this request has no direct + effect. It may alter the state the surface is returned to when + unmaximized unless overridden by the compositor. + </description> + </request> + + <request name="set_fullscreen"> + <description summary="set the window as fullscreen on an output"> + Make the surface fullscreen. + + After requesting that the surface should be fullscreened, the + compositor will respond by emitting a configure event. Whether the + client is actually put into a fullscreen state is subject to compositor + policies. The client must also acknowledge the configure when + committing the new content (see ack_configure). + + The output passed by the request indicates the client's preference as + to which display it should be set fullscreen on. If this value is NULL, + it's up to the compositor to choose which display will be used to map + this surface. + + If the surface doesn't cover the whole output, the compositor will + position the surface in the center of the output and compensate with + with border fill covering the rest of the output. The content of the + border fill is undefined, but should be assumed to be in some way that + attempts to blend into the surrounding area (e.g. solid black). + + If the fullscreened surface is not opaque, the compositor must make + sure that other screen content not part of the same surface tree (made + up of subsurfaces, popups or similarly coupled surfaces) are not + visible below the fullscreened surface. + </description> + <arg name="output" type="object" interface="wl_output" allow-null="true"/> + </request> + + <request name="unset_fullscreen"> + <description summary="unset the window as fullscreen"> + Make the surface no longer fullscreen. + + After requesting that the surface should be unfullscreened, the + compositor will respond by emitting a configure event. + Whether this actually removes the fullscreen state of the client is + subject to compositor policies. + + Making a surface unfullscreen sets states for the surface based on the following: + * the state(s) it may have had before becoming fullscreen + * any state(s) decided by the compositor + * any state(s) requested by the client while the surface was fullscreen + + The compositor may include the previous window geometry dimensions in + the configure event, if applicable. + + The client must also acknowledge the configure when committing the new + content (see ack_configure). + </description> + </request> + + <request name="set_minimized"> + <description summary="set the window as minimized"> + Request that the compositor minimize your surface. There is no + way to know if the surface is currently minimized, nor is there + any way to unset minimization on this surface. + + If you are looking to throttle redrawing when minimized, please + instead use the wl_surface.frame event for this, as this will + also work with live previews on windows in Alt-Tab, Expose or + similar compositor features. + </description> + </request> + + <event name="configure"> + <description summary="suggest a surface change"> + This configure event asks the client to resize its toplevel surface or + to change its state. The configured state should not be applied + immediately. See xdg_surface.configure for details. + + The width and height arguments specify a hint to the window + about how its surface should be resized in window geometry + coordinates. See set_window_geometry. + + If the width or height arguments are zero, it means the client + should decide its own window dimension. This may happen when the + compositor needs to configure the state of the surface but doesn't + have any information about any previous or expected dimension. + + The states listed in the event specify how the width/height + arguments should be interpreted, and possibly how it should be + drawn. + + Clients must send an ack_configure in response to this event. See + xdg_surface.configure and xdg_surface.ack_configure for details. + </description> + <arg name="width" type="int"/> + <arg name="height" type="int"/> + <arg name="states" type="array"/> + </event> + + <event name="close"> + <description summary="surface wants to be closed"> + The close event is sent by the compositor when the user + wants the surface to be closed. This should be equivalent to + the user clicking the close button in client-side decorations, + if your application has any. + + This is only a request that the user intends to close the + window. The client may choose to ignore this request, or show + a dialog to ask the user to save their data, etc. + </description> + </event> + + <!-- Version 4 additions --> + + <event name="configure_bounds" since="4"> + <description summary="recommended window geometry bounds"> + The configure_bounds event may be sent prior to a xdg_toplevel.configure + event to communicate the bounds a window geometry size is recommended + to constrain to. + + The passed width and height are in surface coordinate space. If width + and height are 0, it means bounds is unknown and equivalent to as if no + configure_bounds event was ever sent for this surface. + + The bounds can for example correspond to the size of a monitor excluding + any panels or other shell components, so that a surface isn't created in + a way that it cannot fit. + + The bounds may change at any point, and in such a case, a new + xdg_toplevel.configure_bounds will be sent, followed by + xdg_toplevel.configure and xdg_surface.configure. + </description> + <arg name="width" type="int"/> + <arg name="height" type="int"/> + </event> + + <!-- Version 5 additions --> + + <enum name="wm_capabilities" since="5"> + <entry name="window_menu" value="1" summary="show_window_menu is available"/> + <entry name="maximize" value="2" summary="set_maximized and unset_maximized are available"/> + <entry name="fullscreen" value="3" summary="set_fullscreen and unset_fullscreen are available"/> + <entry name="minimize" value="4" summary="set_minimized is available"/> + </enum> + + <event name="wm_capabilities" since="5"> + <description summary="compositor capabilities"> + This event advertises the capabilities supported by the compositor. If + a capability isn't supported, clients should hide or disable the UI + elements that expose this functionality. For instance, if the + compositor doesn't advertise support for minimized toplevels, a button + triggering the set_minimized request should not be displayed. + + The compositor will ignore requests it doesn't support. For instance, + a compositor which doesn't advertise support for minimized will ignore + set_minimized requests. + + Compositors must send this event once before the first + xdg_surface.configure event. When the capabilities change, compositors + must send this event again and then send an xdg_surface.configure + event. + + The configured state should not be applied immediately. See + xdg_surface.configure for details. + + The capabilities are sent as an array of 32-bit unsigned integers in + native endianness. + </description> + <arg name="capabilities" type="array" summary="array of 32-bit capabilities"/> + </event> + </interface> + + <interface name="xdg_popup" version="5"> + <description summary="short-lived, popup surfaces for menus"> + A popup surface is a short-lived, temporary surface. It can be used to + implement for example menus, popovers, tooltips and other similar user + interface concepts. + + A popup can be made to take an explicit grab. See xdg_popup.grab for + details. + + When the popup is dismissed, a popup_done event will be sent out, and at + the same time the surface will be unmapped. See the xdg_popup.popup_done + event for details. + + Explicitly destroying the xdg_popup object will also dismiss the popup and + unmap the surface. Clients that want to dismiss the popup when another + surface of their own is clicked should dismiss the popup using the destroy + request. + + A newly created xdg_popup will be stacked on top of all previously created + xdg_popup surfaces associated with the same xdg_toplevel. + + The parent of an xdg_popup must be mapped (see the xdg_surface + description) before the xdg_popup itself. + + The client must call wl_surface.commit on the corresponding wl_surface + for the xdg_popup state to take effect. + </description> + + <enum name="error"> + <entry name="invalid_grab" value="0" + summary="tried to grab after being mapped"/> + </enum> + + <request name="destroy" type="destructor"> + <description summary="remove xdg_popup interface"> + This destroys the popup. Explicitly destroying the xdg_popup + object will also dismiss the popup, and unmap the surface. + + If this xdg_popup is not the "topmost" popup, a protocol error + will be sent. + </description> + </request> + + <request name="grab"> + <description summary="make the popup take an explicit grab"> + This request makes the created popup take an explicit grab. An explicit + grab will be dismissed when the user dismisses the popup, or when the + client destroys the xdg_popup. This can be done by the user clicking + outside the surface, using the keyboard, or even locking the screen + through closing the lid or a timeout. + + If the compositor denies the grab, the popup will be immediately + dismissed. + + This request must be used in response to some sort of user action like a + button press, key press, or touch down event. The serial number of the + event should be passed as 'serial'. + + The parent of a grabbing popup must either be an xdg_toplevel surface or + another xdg_popup with an explicit grab. If the parent is another + xdg_popup it means that the popups are nested, with this popup now being + the topmost popup. + + Nested popups must be destroyed in the reverse order they were created + in, e.g. the only popup you are allowed to destroy at all times is the + topmost one. + + When compositors choose to dismiss a popup, they may dismiss every + nested grabbing popup as well. When a compositor dismisses popups, it + will follow the same dismissing order as required from the client. + + If the topmost grabbing popup is destroyed, the grab will be returned to + the parent of the popup, if that parent previously had an explicit grab. + + If the parent is a grabbing popup which has already been dismissed, this + popup will be immediately dismissed. If the parent is a popup that did + not take an explicit grab, an error will be raised. + + During a popup grab, the client owning the grab will receive pointer + and touch events for all their surfaces as normal (similar to an + "owner-events" grab in X11 parlance), while the top most grabbing popup + will always have keyboard focus. + </description> + <arg name="seat" type="object" interface="wl_seat" + summary="the wl_seat of the user event"/> + <arg name="serial" type="uint" summary="the serial of the user event"/> + </request> + + <event name="configure"> + <description summary="configure the popup surface"> + This event asks the popup surface to configure itself given the + configuration. The configured state should not be applied immediately. + See xdg_surface.configure for details. + + The x and y arguments represent the position the popup was placed at + given the xdg_positioner rule, relative to the upper left corner of the + window geometry of the parent surface. + + For version 2 or older, the configure event for an xdg_popup is only + ever sent once for the initial configuration. Starting with version 3, + it may be sent again if the popup is setup with an xdg_positioner with + set_reactive requested, or in response to xdg_popup.reposition requests. + </description> + <arg name="x" type="int" + summary="x position relative to parent surface window geometry"/> + <arg name="y" type="int" + summary="y position relative to parent surface window geometry"/> + <arg name="width" type="int" summary="window geometry width"/> + <arg name="height" type="int" summary="window geometry height"/> + </event> + + <event name="popup_done"> + <description summary="popup interaction is done"> + The popup_done event is sent out when a popup is dismissed by the + compositor. The client should destroy the xdg_popup object at this + point. + </description> + </event> + + <!-- Version 3 additions --> + + <request name="reposition" since="3"> + <description summary="recalculate the popup's location"> + Reposition an already-mapped popup. The popup will be placed given the + details in the passed xdg_positioner object, and a + xdg_popup.repositioned followed by xdg_popup.configure and + xdg_surface.configure will be emitted in response. Any parameters set + by the previous positioner will be discarded. + + The passed token will be sent in the corresponding + xdg_popup.repositioned event. The new popup position will not take + effect until the corresponding configure event is acknowledged by the + client. See xdg_popup.repositioned for details. The token itself is + opaque, and has no other special meaning. + + If multiple reposition requests are sent, the compositor may skip all + but the last one. + + If the popup is repositioned in response to a configure event for its + parent, the client should send an xdg_positioner.set_parent_configure + and possibly an xdg_positioner.set_parent_size request to allow the + compositor to properly constrain the popup. + + If the popup is repositioned together with a parent that is being + resized, but not in response to a configure event, the client should + send an xdg_positioner.set_parent_size request. + </description> + <arg name="positioner" type="object" interface="xdg_positioner"/> + <arg name="token" type="uint" summary="reposition request token"/> + </request> + + <event name="repositioned" since="3"> + <description summary="signal the completion of a repositioned request"> + The repositioned event is sent as part of a popup configuration + sequence, together with xdg_popup.configure and lastly + xdg_surface.configure to notify the completion of a reposition request. + + The repositioned event is to notify about the completion of a + xdg_popup.reposition request. The token argument is the token passed + in the xdg_popup.reposition request. + + Immediately after this event is emitted, xdg_popup.configure and + xdg_surface.configure will be sent with the updated size and position, + as well as a new configure serial. + + The client should optionally update the content of the popup, but must + acknowledge the new popup configuration for the new position to take + effect. See xdg_surface.ack_configure for details. + </description> + <arg name="token" type="uint" summary="reposition request token"/> + </event> + + </interface> +</protocol>