<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="2">

    <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"/>

	     summary="xdg_wm_base was destroyed before children"/>

	     summary="the client tried to map or destroy a non-topmost popup"/>

	     summary="the client specified an invalid popup parent surface"/>

	     summary="the client provided an invalid surface state"/>

	     summary="the client provided an invalid positioner"/>

    </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 protocol 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.

	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.

      </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.ping.

	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.

	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="2">

    <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 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>

	   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.

      </description>

	   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>

	   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>

  </interface>

  <interface name="xdg_surface" version="2">

    <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.

      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.

    </description>

    <enum name="error">

      <entry name="not_constructed" value="1"/>

      <entry name="already_constructed" value="2"/>

      <entry name="unconfigured_buffer" value="3"/>

    </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.

      </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 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.

	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.

      </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="2">

    <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.

      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>

    <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 windows 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 window removes any parent-child

	relationship for the child. Setting a null parent for a window which

	currently has no parent is a no-op.

	If the parent is unmapped then its children are managed as

	though the parent of the now-unmapped parent has become the

	parent of this surface. If no parent exists for the now-unmapped

	parent then the children are managed as though they have no

	parent surface.

      </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".

	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] http://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.

	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. 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" 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 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 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 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 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 a protocol 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

	protocol 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 a protocol 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

	protocol 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.