390 lines
18 KiB
XML
390 lines
18 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="wlr_layer_shell_unstable_v1">
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<copyright>
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Copyright © 2017 Drew DeVault
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that copyright notice and this permission
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notice appear in supporting documentation, and that the name of
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the copyright holders not be used in advertising or publicity
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pertaining to distribution of the software without specific,
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written prior permission. The copyright holders make no
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representations about the suitability of this software for any
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purpose. It is provided "as is" without express or implied
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warranty.
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THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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</copyright>
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<interface name="zwlr_layer_shell_v1" version="4">
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<description summary="create surfaces that are layers of the desktop">
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Clients can use this interface to assign the surface_layer role to
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wl_surfaces. Such surfaces are assigned to a "layer" of the output and
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rendered with a defined z-depth respective to each other. They may also be
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anchored to the edges and corners of a screen and specify input handling
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semantics. This interface should be suitable for the implementation of
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many desktop shell components, and a broad number of other applications
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that interact with the desktop.
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</description>
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<request name="get_layer_surface">
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<description summary="create a layer_surface from a surface">
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Create a layer surface for an existing surface. This assigns the role of
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layer_surface, or raises a protocol error if another role is already
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assigned.
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Creating a layer surface from a wl_surface which has a buffer attached
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or committed is a client error, and any attempts by a client to attach
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or manipulate a buffer prior to the first layer_surface.configure call
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must also be treated as errors.
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After creating a layer_surface object and setting it up, the client
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must perform an initial commit without any buffer attached.
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The compositor will reply with a layer_surface.configure event.
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The client must acknowledge it and is then allowed to attach a buffer
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to map the surface.
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You may pass NULL for output to allow the compositor to decide which
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output to use. Generally this will be the one that the user most
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recently interacted with.
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Clients can specify a namespace that defines the purpose of the layer
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surface.
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</description>
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<arg name="id" type="new_id" interface="zwlr_layer_surface_v1"/>
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<arg name="surface" type="object" interface="wl_surface"/>
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<arg name="output" type="object" interface="wl_output" allow-null="true"/>
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<arg name="layer" type="uint" enum="layer" summary="layer to add this surface to"/>
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<arg name="namespace" type="string" summary="namespace for the layer surface"/>
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</request>
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<enum name="error">
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<entry name="role" value="0" summary="wl_surface has another role"/>
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<entry name="invalid_layer" value="1" summary="layer value is invalid"/>
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<entry name="already_constructed" value="2" summary="wl_surface has a buffer attached or committed"/>
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</enum>
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<enum name="layer">
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<description summary="available layers for surfaces">
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These values indicate which layers a surface can be rendered in. They
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are ordered by z depth, bottom-most first. Traditional shell surfaces
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will typically be rendered between the bottom and top layers.
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Fullscreen shell surfaces are typically rendered at the top layer.
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Multiple surfaces can share a single layer, and ordering within a
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single layer is undefined.
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</description>
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<entry name="background" value="0"/>
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<entry name="bottom" value="1"/>
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<entry name="top" value="2"/>
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<entry name="overlay" value="3"/>
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</enum>
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<!-- Version 3 additions -->
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<request name="destroy" type="destructor" since="3">
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<description summary="destroy the layer_shell object">
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This request indicates that the client will not use the layer_shell
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object any more. Objects that have been created through this instance
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are not affected.
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</description>
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</request>
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</interface>
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<interface name="zwlr_layer_surface_v1" version="4">
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<description summary="layer metadata interface">
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An interface that may be implemented by a wl_surface, for surfaces that
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are designed to be rendered as a layer of a stacked desktop-like
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environment.
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Layer surface state (layer, size, anchor, exclusive zone,
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margin, interactivity) is double-buffered, and will be applied at the
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time wl_surface.commit of the corresponding wl_surface is called.
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Attaching a null buffer to a layer surface unmaps it.
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Unmapping a layer_surface means that the surface cannot be shown by the
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compositor until it is explicitly mapped again. The layer_surface
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returns to the state it had right after layer_shell.get_layer_surface.
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The client can re-map the surface by performing a commit without any
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buffer attached, waiting for a configure event and handling it as usual.
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</description>
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<request name="set_size">
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<description summary="sets the size of the surface">
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Sets the size of the surface in surface-local coordinates. The
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compositor will display the surface centered with respect to its
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anchors.
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If you pass 0 for either value, the compositor will assign it and
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inform you of the assignment in the configure event. You must set your
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anchor to opposite edges in the dimensions you omit; not doing so is a
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protocol error. Both values are 0 by default.
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Size is double-buffered, see wl_surface.commit.
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</description>
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<arg name="width" type="uint"/>
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<arg name="height" type="uint"/>
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</request>
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<request name="set_anchor">
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<description summary="configures the anchor point of the surface">
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Requests that the compositor anchor the surface to the specified edges
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and corners. If two orthogonal edges are specified (e.g. 'top' and
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'left'), then the anchor point will be the intersection of the edges
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(e.g. the top left corner of the output); otherwise the anchor point
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will be centered on that edge, or in the center if none is specified.
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Anchor is double-buffered, see wl_surface.commit.
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</description>
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<arg name="anchor" type="uint" enum="anchor"/>
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</request>
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<request name="set_exclusive_zone">
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<description summary="configures the exclusive geometry of this surface">
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Requests that the compositor avoids occluding an area with other
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surfaces. The compositor's use of this information is
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implementation-dependent - do not assume that this region will not
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actually be occluded.
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A positive value is only meaningful if the surface is anchored to one
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edge or an edge and both perpendicular edges. If the surface is not
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anchored, anchored to only two perpendicular edges (a corner), anchored
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to only two parallel edges or anchored to all edges, a positive value
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will be treated the same as zero.
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A positive zone is the distance from the edge in surface-local
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coordinates to consider exclusive.
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Surfaces that do not wish to have an exclusive zone may instead specify
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how they should interact with surfaces that do. If set to zero, the
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surface indicates that it would like to be moved to avoid occluding
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surfaces with a positive exclusive zone. If set to -1, the surface
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indicates that it would not like to be moved to accommodate for other
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surfaces, and the compositor should extend it all the way to the edges
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it is anchored to.
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For example, a panel might set its exclusive zone to 10, so that
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maximized shell surfaces are not shown on top of it. A notification
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might set its exclusive zone to 0, so that it is moved to avoid
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occluding the panel, but shell surfaces are shown underneath it. A
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wallpaper or lock screen might set their exclusive zone to -1, so that
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they stretch below or over the panel.
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The default value is 0.
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Exclusive zone is double-buffered, see wl_surface.commit.
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</description>
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<arg name="zone" type="int"/>
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</request>
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<request name="set_margin">
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<description summary="sets a margin from the anchor point">
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Requests that the surface be placed some distance away from the anchor
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point on the output, in surface-local coordinates. Setting this value
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for edges you are not anchored to has no effect.
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The exclusive zone includes the margin.
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Margin is double-buffered, see wl_surface.commit.
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</description>
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<arg name="top" type="int"/>
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<arg name="right" type="int"/>
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<arg name="bottom" type="int"/>
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<arg name="left" type="int"/>
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</request>
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<enum name="keyboard_interactivity">
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<description summary="types of keyboard interaction possible for a layer shell surface">
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Types of keyboard interaction possible for layer shell surfaces. The
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rationale for this is twofold: (1) some applications are not interested
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in keyboard events and not allowing them to be focused can improve the
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desktop experience; (2) some applications will want to take exclusive
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keyboard focus.
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</description>
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<entry name="none" value="0">
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<description summary="no keyboard focus is possible">
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This value indicates that this surface is not interested in keyboard
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events and the compositor should never assign it the keyboard focus.
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This is the default value, set for newly created layer shell surfaces.
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This is useful for e.g. desktop widgets that display information or
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only have interaction with non-keyboard input devices.
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</description>
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</entry>
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<entry name="exclusive" value="1">
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<description summary="request exclusive keyboard focus">
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Request exclusive keyboard focus if this surface is above the shell surface layer.
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For the top and overlay layers, the seat will always give
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exclusive keyboard focus to the top-most layer which has keyboard
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interactivity set to exclusive. If this layer contains multiple
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surfaces with keyboard interactivity set to exclusive, the compositor
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determines the one receiving keyboard events in an implementation-
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defined manner. In this case, no guarantee is made when this surface
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will receive keyboard focus (if ever).
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For the bottom and background layers, the compositor is allowed to use
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normal focus semantics.
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This setting is mainly intended for applications that need to ensure
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they receive all keyboard events, such as a lock screen or a password
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prompt.
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</description>
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</entry>
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<entry name="on_demand" value="2" since="4">
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<description summary="request regular keyboard focus semantics">
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This requests the compositor to allow this surface to be focused and
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unfocused by the user in an implementation-defined manner. The user
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should be able to unfocus this surface even regardless of the layer
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it is on.
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Typically, the compositor will want to use its normal mechanism to
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manage keyboard focus between layer shell surfaces with this setting
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and regular toplevels on the desktop layer (e.g. click to focus).
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Nevertheless, it is possible for a compositor to require a special
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interaction to focus or unfocus layer shell surfaces (e.g. requiring
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a click even if focus follows the mouse normally, or providing a
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keybinding to switch focus between layers).
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This setting is mainly intended for desktop shell components (e.g.
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panels) that allow keyboard interaction. Using this option can allow
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implementing a desktop shell that can be fully usable without the
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mouse.
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</description>
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</entry>
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</enum>
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<request name="set_keyboard_interactivity">
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<description summary="requests keyboard events">
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Set how keyboard events are delivered to this surface. By default,
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layer shell surfaces do not receive keyboard events; this request can
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be used to change this.
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This setting is inherited by child surfaces set by the get_popup
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request.
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Layer surfaces receive pointer, touch, and tablet events normally. If
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you do not want to receive them, set the input region on your surface
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to an empty region.
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Keyboard interactivity is double-buffered, see wl_surface.commit.
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</description>
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<arg name="keyboard_interactivity" type="uint" enum="keyboard_interactivity"/>
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</request>
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<request name="get_popup">
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<description summary="assign this layer_surface as an xdg_popup parent">
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This assigns an xdg_popup's parent to this layer_surface. This popup
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should have been created via xdg_surface::get_popup with the parent set
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to NULL, and this request must be invoked before committing the popup's
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initial state.
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See the documentation of xdg_popup for more details about what an
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xdg_popup is and how it is used.
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</description>
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<arg name="popup" type="object" interface="xdg_popup"/>
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</request>
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<request name="ack_configure">
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<description summary="ack a configure event">
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When a configure event is received, if a client commits the
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surface in response to the configure event, then the client
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must make an ack_configure request sometime before the commit
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request, passing along the serial of the configure event.
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If the client receives multiple configure events before it
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can respond to one, it only has to ack the last configure event.
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A client is not required to commit immediately after sending
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an ack_configure request - it may even ack_configure several times
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before its next surface commit.
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A client may send multiple ack_configure requests before committing, but
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only the last request sent before a commit indicates which configure
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event the client really is responding to.
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</description>
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<arg name="serial" type="uint" summary="the serial from the configure event"/>
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</request>
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<request name="destroy" type="destructor">
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<description summary="destroy the layer_surface">
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This request destroys the layer surface.
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</description>
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</request>
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<event name="configure">
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<description summary="suggest a surface change">
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The configure event asks the client to resize its surface.
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Clients should arrange their surface for the new states, and then send
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an ack_configure request with the serial sent in this configure event at
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some point before committing the new surface.
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The client is free to dismiss all but the last configure event it
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received.
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The width and height arguments specify the size of the window in
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surface-local coordinates.
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The size is a hint, in the sense that the client is free to ignore it if
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it doesn't resize, pick a smaller size (to satisfy aspect ratio or
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resize in steps of NxM pixels). If the client picks a smaller size and
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is anchored to two opposite anchors (e.g. 'top' and 'bottom'), the
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surface will be centered on this axis.
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If the width or height arguments are zero, it means the client should
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decide its own window dimension.
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</description>
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<arg name="serial" type="uint"/>
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<arg name="width" type="uint"/>
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<arg name="height" type="uint"/>
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</event>
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<event name="closed">
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<description summary="surface should be closed">
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The closed event is sent by the compositor when the surface will no
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longer be shown. The output may have been destroyed or the user may
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have asked for it to be removed. Further changes to the surface will be
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ignored. The client should destroy the resource after receiving this
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event, and create a new surface if they so choose.
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</description>
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</event>
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<enum name="error">
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<entry name="invalid_surface_state" value="0" summary="provided surface state is invalid"/>
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<entry name="invalid_size" value="1" summary="size is invalid"/>
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<entry name="invalid_anchor" value="2" summary="anchor bitfield is invalid"/>
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<entry name="invalid_keyboard_interactivity" value="3" summary="keyboard interactivity is invalid"/>
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</enum>
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<enum name="anchor" bitfield="true">
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<entry name="top" value="1" summary="the top edge of the anchor rectangle"/>
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<entry name="bottom" value="2" summary="the bottom edge of the anchor rectangle"/>
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<entry name="left" value="4" summary="the left edge of the anchor rectangle"/>
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<entry name="right" value="8" summary="the right edge of the anchor rectangle"/>
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</enum>
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<!-- Version 2 additions -->
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<request name="set_layer" since="2">
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<description summary="change the layer of the surface">
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Change the layer that the surface is rendered on.
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Layer is double-buffered, see wl_surface.commit.
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</description>
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<arg name="layer" type="uint" enum="zwlr_layer_shell_v1.layer" summary="layer to move this surface to"/>
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</request>
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</interface>
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</protocol>
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