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339 lines
15 KiB
339 lines
15 KiB
<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="pointer_constraints_unstable_v1">
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<copyright>
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Copyright © 2014 Jonas Ådahl
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Copyright © 2015 Red Hat Inc.
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice (including the next
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paragraph) shall be included in all copies or substantial portions of the
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Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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</copyright>
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<description summary="protocol for constraining pointer motions">
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This protocol specifies a set of interfaces used for adding constraints to
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the motion of a pointer. Possible constraints include confining pointer
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motions to a given region, or locking it to its current position.
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In order to constrain the pointer, a client must first bind the global
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interface "wp_pointer_constraints" which, if a compositor supports pointer
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constraints, is exposed by the registry. Using the bound global object, the
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client uses the request that corresponds to the type of constraint it wants
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to make. See wp_pointer_constraints for more details.
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Warning! The protocol described in this file is experimental and backward
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incompatible changes may be made. Backward compatible changes may be added
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together with the corresponding interface version bump. Backward
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incompatible changes are done by bumping the version number in the protocol
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and interface names and resetting the interface version. Once the protocol
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is to be declared stable, the 'z' prefix and the version number in the
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protocol and interface names are removed and the interface version number is
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reset.
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</description>
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<interface name="zwp_pointer_constraints_v1" version="1">
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<description summary="constrain the movement of a pointer">
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The global interface exposing pointer constraining functionality. It
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exposes two requests: lock_pointer for locking the pointer to its
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position, and confine_pointer for locking the pointer to a region.
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The lock_pointer and confine_pointer requests create the objects
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wp_locked_pointer and wp_confined_pointer respectively, and the client can
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use these objects to interact with the lock.
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For any surface, only one lock or confinement may be active across all
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wl_pointer objects of the same seat. If a lock or confinement is requested
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when another lock or confinement is active or requested on the same surface
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and with any of the wl_pointer objects of the same seat, an
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'already_constrained' error will be raised.
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</description>
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<enum name="error">
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<description summary="wp_pointer_constraints error values">
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These errors can be emitted in response to wp_pointer_constraints
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requests.
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</description>
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<entry name="already_constrained" value="1"
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summary="pointer constraint already requested on that surface"/>
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</enum>
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<enum name="lifetime">
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<description summary="constraint lifetime">
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These values represent different lifetime semantics. They are passed
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as arguments to the factory requests to specify how the constraint
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lifetimes should be managed.
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</description>
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<entry name="oneshot" value="1">
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<description summary="the pointer constraint is defunct once deactivated">
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A oneshot pointer constraint will never reactivate once it has been
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deactivated. See the corresponding deactivation event
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(wp_locked_pointer.unlocked and wp_confined_pointer.unconfined) for
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details.
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</description>
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</entry>
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<entry name="persistent" value="2">
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<description summary="the pointer constraint may reactivate">
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A persistent pointer constraint may again reactivate once it has
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been deactivated. See the corresponding deactivation event
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(wp_locked_pointer.unlocked and wp_confined_pointer.unconfined) for
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details.
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</description>
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</entry>
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</enum>
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<request name="destroy" type="destructor">
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<description summary="destroy the pointer constraints manager object">
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Used by the client to notify the server that it will no longer use this
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pointer constraints object.
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</description>
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</request>
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<request name="lock_pointer">
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<description summary="lock pointer to a position">
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The lock_pointer request lets the client request to disable movements of
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the virtual pointer (i.e. the cursor), effectively locking the pointer
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to a position. This request may not take effect immediately; in the
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future, when the compositor deems implementation-specific constraints
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are satisfied, the pointer lock will be activated and the compositor
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sends a locked event.
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The protocol provides no guarantee that the constraints are ever
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satisfied, and does not require the compositor to send an error if the
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constraints cannot ever be satisfied. It is thus possible to request a
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lock that will never activate.
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There may not be another pointer constraint of any kind requested or
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active on the surface for any of the wl_pointer objects of the seat of
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the passed pointer when requesting a lock. If there is, an error will be
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raised. See general pointer lock documentation for more details.
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The intersection of the region passed with this request and the input
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region of the surface is used to determine where the pointer must be
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in order for the lock to activate. It is up to the compositor whether to
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warp the pointer or require some kind of user interaction for the lock
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to activate. If the region is null the surface input region is used.
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A surface may receive pointer focus without the lock being activated.
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The request creates a new object wp_locked_pointer which is used to
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interact with the lock as well as receive updates about its state. See
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the the description of wp_locked_pointer for further information.
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Note that while a pointer is locked, the wl_pointer objects of the
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corresponding seat will not emit any wl_pointer.motion events, but
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relative motion events will still be emitted via wp_relative_pointer
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objects of the same seat. wl_pointer.axis and wl_pointer.button events
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are unaffected.
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</description>
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<arg name="id" type="new_id" interface="zwp_locked_pointer_v1"/>
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<arg name="surface" type="object" interface="wl_surface"
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summary="surface to lock pointer to"/>
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<arg name="pointer" type="object" interface="wl_pointer"
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summary="the pointer that should be locked"/>
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<arg name="region" type="object" interface="wl_region" allow-null="true"
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summary="region of surface"/>
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<arg name="lifetime" type="uint" summary="lock lifetime"/>
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</request>
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<request name="confine_pointer">
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<description summary="confine pointer to a region">
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The confine_pointer request lets the client request to confine the
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pointer cursor to a given region. This request may not take effect
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immediately; in the future, when the compositor deems implementation-
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specific constraints are satisfied, the pointer confinement will be
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activated and the compositor sends a confined event.
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The intersection of the region passed with this request and the input
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region of the surface is used to determine where the pointer must be
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in order for the confinement to activate. It is up to the compositor
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whether to warp the pointer or require some kind of user interaction for
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the confinement to activate. If the region is null the surface input
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region is used.
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The request will create a new object wp_confined_pointer which is used
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to interact with the confinement as well as receive updates about its
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state. See the the description of wp_confined_pointer for further
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information.
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</description>
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<arg name="id" type="new_id" interface="zwp_confined_pointer_v1"/>
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<arg name="surface" type="object" interface="wl_surface"
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summary="surface to lock pointer to"/>
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<arg name="pointer" type="object" interface="wl_pointer"
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summary="the pointer that should be confined"/>
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<arg name="region" type="object" interface="wl_region" allow-null="true"
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summary="region of surface"/>
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<arg name="lifetime" type="uint" summary="confinement lifetime"/>
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</request>
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</interface>
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<interface name="zwp_locked_pointer_v1" version="1">
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<description summary="receive relative pointer motion events">
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The wp_locked_pointer interface represents a locked pointer state.
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While the lock of this object is active, the wl_pointer objects of the
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associated seat will not emit any wl_pointer.motion events.
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This object will send the event 'locked' when the lock is activated.
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Whenever the lock is activated, it is guaranteed that the locked surface
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will already have received pointer focus and that the pointer will be
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within the region passed to the request creating this object.
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To unlock the pointer, send the destroy request. This will also destroy
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the wp_locked_pointer object.
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If the compositor decides to unlock the pointer the unlocked event is
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sent. See wp_locked_pointer.unlock for details.
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When unlocking, the compositor may warp the cursor position to the set
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cursor position hint. If it does, it will not result in any relative
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motion events emitted via wp_relative_pointer.
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If the surface the lock was requested on is destroyed and the lock is not
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yet activated, the wp_locked_pointer object is now defunct and must be
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destroyed.
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</description>
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<request name="destroy" type="destructor">
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<description summary="destroy the locked pointer object">
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Destroy the locked pointer object. If applicable, the compositor will
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unlock the pointer.
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</description>
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</request>
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<request name="set_cursor_position_hint">
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<description summary="set the pointer cursor position hint">
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Set the cursor position hint relative to the top left corner of the
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surface.
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If the client is drawing its own cursor, it should update the position
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hint to the position of its own cursor. A compositor may use this
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information to warp the pointer upon unlock in order to avoid pointer
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jumps.
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The cursor position hint is double buffered. The new hint will only take
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effect when the associated surface gets it pending state applied. See
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wl_surface.commit for details.
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</description>
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<arg name="surface_x" type="fixed"
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summary="surface-local x coordinate"/>
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<arg name="surface_y" type="fixed"
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summary="surface-local y coordinate"/>
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</request>
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<request name="set_region">
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<description summary="set a new lock region">
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Set a new region used to lock the pointer.
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The new lock region is double-buffered. The new lock region will
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only take effect when the associated surface gets its pending state
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applied. See wl_surface.commit for details.
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For details about the lock region, see wp_locked_pointer.
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</description>
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<arg name="region" type="object" interface="wl_region" allow-null="true"
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summary="region of surface"/>
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</request>
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<event name="locked">
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<description summary="lock activation event">
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Notification that the pointer lock of the seat's pointer is activated.
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</description>
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</event>
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<event name="unlocked">
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<description summary="lock deactivation event">
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Notification that the pointer lock of the seat's pointer is no longer
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active. If this is a oneshot pointer lock (see
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wp_pointer_constraints.lifetime) this object is now defunct and should
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be destroyed. If this is a persistent pointer lock (see
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wp_pointer_constraints.lifetime) this pointer lock may again
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reactivate in the future.
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</description>
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</event>
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</interface>
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<interface name="zwp_confined_pointer_v1" version="1">
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<description summary="confined pointer object">
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The wp_confined_pointer interface represents a confined pointer state.
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This object will send the event 'confined' when the confinement is
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activated. Whenever the confinement is activated, it is guaranteed that
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the surface the pointer is confined to will already have received pointer
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focus and that the pointer will be within the region passed to the request
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creating this object. It is up to the compositor to decide whether this
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requires some user interaction and if the pointer will warp to within the
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passed region if outside.
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To unconfine the pointer, send the destroy request. This will also destroy
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the wp_confined_pointer object.
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If the compositor decides to unconfine the pointer the unconfined event is
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sent. The wp_confined_pointer object is at this point defunct and should
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be destroyed.
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</description>
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<request name="destroy" type="destructor">
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<description summary="destroy the confined pointer object">
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Destroy the confined pointer object. If applicable, the compositor will
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unconfine the pointer.
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</description>
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</request>
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<request name="set_region">
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<description summary="set a new confine region">
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Set a new region used to confine the pointer.
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The new confine region is double-buffered. The new confine region will
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only take effect when the associated surface gets its pending state
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applied. See wl_surface.commit for details.
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If the confinement is active when the new confinement region is applied
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and the pointer ends up outside of newly applied region, the pointer may
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warped to a position within the new confinement region. If warped, a
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wl_pointer.motion event will be emitted, but no
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wp_relative_pointer.relative_motion event.
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The compositor may also, instead of using the new region, unconfine the
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pointer.
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For details about the confine region, see wp_confined_pointer.
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</description>
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<arg name="region" type="object" interface="wl_region" allow-null="true"
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summary="region of surface"/>
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</request>
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<event name="confined">
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<description summary="pointer confined">
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Notification that the pointer confinement of the seat's pointer is
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activated.
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</description>
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</event>
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<event name="unconfined">
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<description summary="pointer unconfined">
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Notification that the pointer confinement of the seat's pointer is no
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longer active. If this is a oneshot pointer confinement (see
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wp_pointer_constraints.lifetime) this object is now defunct and should
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be destroyed. If this is a persistent pointer confinement (see
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wp_pointer_constraints.lifetime) this pointer confinement may again
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reactivate in the future.
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</description>
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</event>
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</interface>
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</protocol>
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