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+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_layer_shell_unstable_v1">
+ <copyright>
+ Copyright © 2017 Drew DeVault
+
+ Permission to use, copy, modify, distribute, and sell this
+ software and its documentation for any purpose is hereby granted
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that copyright notice and this permission
+ notice appear in supporting documentation, and that the name of
+ the copyright holders not be used in advertising or publicity
+ pertaining to distribution of the software without specific,
+ written prior permission. The copyright holders make no
+ representations about the suitability of this software for any
+ purpose. It is provided "as is" without express or implied
+ warranty.
+
+ THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+ THIS SOFTWARE.
+ </copyright>
+
+ <interface name="zwlr_layer_shell_v1" version="1">
+ <description summary="create surfaces that are layers of the desktop">
+ Clients can use this interface to assign the surface_layer role to
+ wl_surfaces. Such surfaces are assigned to a "layer" of the output and
+ rendered with a defined z-depth respective to each other. They may also be
+ anchored to the edges and corners of a screen and specify input handling
+ semantics. This interface should be suitable for the implementation of
+ many desktop shell components, and a broad number of other applications
+ that interact with the desktop.
+ </description>
+
+ <request name="get_layer_surface">
+ <description summary="create a layer_surface from a surface">
+ Create a layer surface for an existing surface. This assigns the role of
+ layer_surface, or raises a protocol error if another role is already
+ assigned.
+
+ Creating a layer 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 layer_surface.configure call
+ must also be treated as errors.
+
+ You may pass NULL for output to allow the compositor to decide which
+ output to use. Generally this will be the one that the user most
+ recently interacted with.
+
+ Clients can specify a namespace that defines the purpose of the layer
+ surface.
+ </description>
+ <arg name="id" type="new_id" interface="zwlr_layer_surface_v1"/>
+ <arg name="surface" type="object" interface="wl_surface"/>
+ <arg name="output" type="object" interface="wl_output" allow-null="true"/>
+ <arg name="layer" type="uint" enum="layer" summary="layer to add this surface to"/>
+ <arg name="namespace" type="string" summary="namespace for the layer surface"/>
+ </request>
+
+ <enum name="error">
+ <entry name="role" value="0" summary="wl_surface has another role"/>
+ <entry name="invalid_layer" value="1" summary="layer value is invalid"/>
+ <entry name="already_constructed" value="2" summary="wl_surface has a buffer attached or committed"/>
+ </enum>
+
+ <enum name="layer">
+ <description summary="available layers for surfaces">
+ These values indicate which layers a surface can be rendered in. They
+ are ordered by z depth, bottom-most first. Traditional shell surfaces
+ will typically be rendered between the bottom and top layers.
+ Fullscreen shell surfaces are typically rendered at the top layer.
+ Multiple surfaces can share a single layer, and ordering within a
+ single layer is undefined.
+ </description>
+
+ <entry name="background" value="0"/>
+ <entry name="bottom" value="1"/>
+ <entry name="top" value="2"/>
+ <entry name="overlay" value="3"/>
+ </enum>
+ </interface>
+
+ <interface name="zwlr_layer_surface_v1" version="1">
+ <description summary="layer metadata interface">
+ An interface that may be implemented by a wl_surface, for surfaces that
+ are designed to be rendered as a layer of a stacked desktop-like
+ environment.
+
+ Layer surface state (size, anchor, exclusive zone, margin, interactivity)
+ is double-buffered, and will be applied at the time wl_surface.commit of
+ the corresponding wl_surface is called.
+ </description>
+
+ <request name="set_size">
+ <description summary="sets the size of the surface">
+ Sets the size of the surface in surface-local coordinates. The
+ compositor will display the surface centered with respect to its
+ anchors.
+
+ If you pass 0 for either value, the compositor will assign it and
+ inform you of the assignment in the configure event. You must set your
+ anchor to opposite edges in the dimensions you omit; not doing so is a
+ protocol error. Both values are 0 by default.
+
+ Size is double-buffered, see wl_surface.commit.
+ </description>
+ <arg name="width" type="uint"/>
+ <arg name="height" type="uint"/>
+ </request>
+
+ <request name="set_anchor">
+ <description summary="configures the anchor point of the surface">
+ Requests that the compositor anchor the surface to the specified edges
+ and corners. If two orthogonal edges are specified (e.g. 'top' and
+ 'left'), then the anchor point will be the intersection of the edges
+ (e.g. the top left corner of the output); otherwise the anchor point
+ will be centered on that edge, or in the center if none is specified.
+
+ Anchor is double-buffered, see wl_surface.commit.
+ </description>
+ <arg name="anchor" type="uint" enum="anchor"/>
+ </request>
+
+ <request name="set_exclusive_zone">
+ <description summary="configures the exclusive geometry of this surface">
+ Requests that the compositor avoids occluding an area of the surface
+ with other surfaces. The compositor's use of this information is
+ implementation-dependent - do not assume that this region will not
+ actually be occluded.
+
+ A positive value is only meaningful if the surface is anchored to an
+ edge, rather than a corner. The zone is the number of surface-local
+ coordinates from the edge that is considered exclusive.
+
+ Surfaces that do not wish to have an exclusive zone may instead specify
+ how they should interact with surfaces that do. If set to zero, the
+ surface indicates that it would like to be moved to avoid occluding
+ surfaces with a positive exclusive zone. If set to -1, the surface
+ indicates that it would not like to be moved to accommodate for other
+ surfaces, and the compositor should extend it all the way to the edges
+ it is anchored to.
+
+ For example, a panel might set its exclusive zone to 10, so that
+ maximized shell surfaces are not shown on top of it. A notification
+ might set its exclusive zone to 0, so that it is moved to avoid
+ occluding the panel, but shell surfaces are shown underneath it. A
+ wallpaper or lock screen might set their exclusive zone to -1, so that
+ they stretch below or over the panel.
+
+ The default value is 0.
+
+ Exclusive zone is double-buffered, see wl_surface.commit.
+ </description>
+ <arg name="zone" type="int"/>
+ </request>
+
+ <request name="set_margin">
+ <description summary="sets a margin from the anchor point">
+ Requests that the surface be placed some distance away from the anchor
+ point on the output, in surface-local coordinates. Setting this value
+ for edges you are not anchored to has no effect.
+
+ The exclusive zone includes the margin.
+
+ Margin is double-buffered, see wl_surface.commit.
+ </description>
+ <arg name="top" type="int"/>
+ <arg name="right" type="int"/>
+ <arg name="bottom" type="int"/>
+ <arg name="left" type="int"/>
+ </request>
+
+ <request name="set_keyboard_interactivity">
+ <description summary="requests keyboard events">
+ Set to 1 to request that the seat send keyboard events to this layer
+ surface. For layers below the shell surface layer, the seat will use
+ normal focus semantics. For layers above the shell surface layers, the
+ seat will always give exclusive keyboard focus to the top-most layer
+ which has keyboard interactivity set to true.
+
+ Layer surfaces receive pointer, touch, and tablet events normally. If
+ you do not want to receive them, set the input region on your surface
+ to an empty region.
+
+ Events is double-buffered, see wl_surface.commit.
+ </description>
+ <arg name="keyboard_interactivity" type="uint"/>
+ </request>
+
+ <request name="get_popup">
+ <description summary="assign this layer_surface as an xdg_popup parent">
+ This assigns an xdg_popup's parent to this layer_surface. This popup
+ should have been created via xdg_surface::get_popup with the parent set
+ to NULL, and this request must be invoked before committing the popup's
+ 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="popup" type="object" interface="xdg_popup"/>
+ </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.
+
+ 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>
+
+ <request name="destroy" type="destructor">
+ <description summary="destroy the layer_surface">
+ This request destroys the layer surface.
+ </description>
+ </request>
+
+ <event name="configure">
+ <description summary="suggest a surface change">
+ The configure event asks the client to resize its surface.
+
+ 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.
+
+ The client is free to dismiss all but the last configure event it
+ received.
+
+ The width and height arguments specify the size of the window in
+ surface-local coordinates.
+
+ The size is a hint, in the sense that the client is free to ignore it if
+ it doesn't resize, pick a smaller size (to satisfy aspect ratio or
+ resize in steps of NxM pixels). If the client picks a smaller size and
+ is anchored to two opposite anchors (e.g. 'top' and 'bottom'), the
+ surface will be centered on this axis.
+
+ If the width or height arguments are zero, it means the client should
+ decide its own window dimension.
+ </description>
+ <arg name="serial" type="uint"/>
+ <arg name="width" type="uint"/>
+ <arg name="height" type="uint"/>
+ </event>
+
+ <event name="closed">
+ <description summary="surface should be closed">
+ The closed event is sent by the compositor when the surface will no
+ longer be shown. The output may have been destroyed or the user may
+ have asked for it to be removed. Further changes to the surface will be
+ ignored. The client should destroy the resource after receiving this
+ event, and create a new surface if they so choose.
+ </description>
+ </event>
+
+ <enum name="error">
+ <entry name="invalid_surface_state" value="0" summary="provided surface state is invalid"/>
+ <entry name="invalid_size" value="1" summary="size is invalid"/>
+ <entry name="invalid_anchor" value="2" summary="anchor bitfield is invalid"/>
+ </enum>
+
+ <enum name="anchor" bitfield="true">
+ <entry name="top" value="1" summary="the top edge of the anchor rectangle"/>
+ <entry name="bottom" value="2" summary="the bottom edge of the anchor rectangle"/>
+ <entry name="left" value="4" summary="the left edge of the anchor rectangle"/>
+ <entry name="right" value="8" summary="the right edge of the anchor rectangle"/>
+ </enum>
+ </interface>
+</protocol>