<?xml version="1.0" encoding="UTF-8"?>
<protocol name="xdg_decoration_unstable_v1">
  <copyright>
    Copyright © 2018 Simon Ser

    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="zxdg_decoration_manager_v1" version="2">
    <description summary="window decoration manager">
      This interface allows a compositor to announce support for server-side
      decorations.

      A window decoration is a set of window controls as deemed appropriate by
      the party managing them, such as user interface components used to move,
      resize and change a window's state.

      A client can use this protocol to request being decorated by a supporting
      compositor.

      If compositor and client do not negotiate the use of a server-side
      decoration using this protocol, clients continue to self-decorate as they
      see fit.

      Warning! The protocol described in this file is experimental and
      backward incompatible changes may be made. Backward compatible changes
      may be added together with the corresponding interface version bump.
      Backward incompatible changes are done by bumping the version number in
      the protocol and interface names and resetting the interface version.
      Once the protocol is to be declared stable, the 'z' prefix and the
      version number in the protocol and interface names are removed and the
      interface version number is reset.
    </description>

    <request name="destroy" type="destructor">
      <description summary="destroy the decoration manager object">
        Destroy the decoration manager. This doesn't destroy objects created
        with the manager.
      </description>
    </request>

    <request name="get_toplevel_decoration">
      <description summary="create a new toplevel decoration object">
        Create a new decoration object associated with the given toplevel.

        For objects of version 1, creating an xdg_toplevel_decoration from an
        xdg_toplevel 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_toplevel_decoration.configure event must also be
        treated as errors.

        For objects of version 2 or newer, creating an xdg_toplevel_decoration
        from an xdg_toplevel which has a buffer attached or committed is
        allowed. The initial decoration mode of the surface if a buffer is
        already attached depends on whether a xdg_toplevel_decoration object
        has been associated with the surface or not prior to this request.

        If an xdg_toplevel_decoration was associated with the surface, then
        destroyed without a surface commit, the previous decoration mode is
        retained.

        If no xdg_toplevel_decoration was associated with the surface prior to
        this request, or if a surface commit has been perfomed after a previous
        xdg_toplevel_decoration object associated with the surface was
        destroyed, the decoration mode is assumed to be client-side.
      </description>
      <arg name="id" type="new_id" interface="zxdg_toplevel_decoration_v1"/>
      <arg name="toplevel" type="object" interface="xdg_toplevel"/>
    </request>
  </interface>

  <interface name="zxdg_toplevel_decoration_v1" version="2">
    <description summary="decoration object for a toplevel surface">
      The decoration object allows the compositor to toggle server-side window
      decorations for a toplevel surface. The client can request to switch to
      another mode.

      The xdg_toplevel_decoration object must be destroyed before its
      xdg_toplevel.
    </description>

    <enum name="error">
      <entry name="unconfigured_buffer" value="0"
        summary="xdg_toplevel has a buffer attached before configure"/>
      <entry name="already_constructed" value="1"
        summary="xdg_toplevel already has a decoration object"/>
      <entry name="orphaned" value="2"
        summary="xdg_toplevel destroyed before the decoration object"/>
      <entry name="invalid_mode" value="3" summary="invalid mode"/>
    </enum>

    <request name="destroy" type="destructor">
      <description summary="destroy the decoration object">
        Switch back to a mode without any server-side decorations at the next
        commit, unless a new xdg_toplevel_decoration is created for the surface
        first.
      </description>
    </request>

    <enum name="mode">
      <description summary="window decoration modes">
        These values describe window decoration modes.
      </description>
      <entry name="client_side" value="1"
        summary="no server-side window decoration"/>
      <entry name="server_side" value="2"
        summary="server-side window decoration"/>
    </enum>

    <request name="set_mode">
      <description summary="set the decoration mode">
        Set the toplevel surface decoration mode. This informs the compositor
        that the client prefers the provided decoration mode.

        After requesting a decoration mode, the compositor will respond by
        emitting an xdg_surface.configure event. The client should then update
        its content, drawing it without decorations if the received mode is
        server-side decorations. The client must also acknowledge the configure
        when committing the new content (see xdg_surface.ack_configure).

        The compositor can decide not to use the client's mode and enforce a
        different mode instead.

        Clients whose decoration mode depend on the xdg_toplevel state may send
        a set_mode request in response to an xdg_surface.configure event and wait
        for the next xdg_surface.configure event to prevent unwanted state.
        Such clients are responsible for preventing configure loops and must
        make sure not to send multiple successive set_mode requests with the
        same decoration mode.

        If an invalid mode is supplied by the client, the invalid_mode protocol
        error is raised by the compositor.
      </description>
      <arg name="mode" type="uint" enum="mode" summary="the decoration mode"/>
    </request>

    <request name="unset_mode">
      <description summary="unset the decoration mode">
        Unset the toplevel surface decoration mode. This informs the compositor
        that the client doesn't prefer a particular decoration mode.

        This request has the same semantics as set_mode.
      </description>
    </request>

    <event name="configure">
      <description summary="notify a decoration mode change">
        The configure event configures the effective decoration mode. The
        configured state should not be applied immediately. Clients must send an
        ack_configure in response to this event. See xdg_surface.configure and
        xdg_surface.ack_configure for details.

        A configure event can be sent at any time. The specified mode must be
        obeyed by the client.
      </description>
      <arg name="mode" type="uint" enum="mode" summary="the decoration mode"/>
    </event>
  </interface>
</protocol>
