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495 lines
21 KiB
XML
495 lines
21 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="input_method_unstable_v2">
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<copyright>
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Copyright © 2008-2011 Kristian Høgsberg
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Copyright © 2010-2011 Intel Corporation
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Copyright © 2012-2013 Collabora, Ltd.
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Copyright © 2012, 2013 Intel Corporation
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Copyright © 2015, 2016 Jan Arne Petersen
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Copyright © 2017, 2018 Red Hat, Inc.
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Copyright © 2018 Purism SPC
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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 creating input methods">
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This protocol allows applications to act as input methods for compositors.
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An input method context is used to manage the state of the input method.
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Text strings are UTF-8 encoded, their indices and lengths are in bytes.
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This document adheres to the RFC 2119 when using words like "must",
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"should", "may", etc.
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Warning! The protocol described in this file is experimental and
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backward incompatible changes may be made. Backward compatible changes
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may be added together with the corresponding interface version bump.
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Backward incompatible changes are done by bumping the version number in
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the protocol and interface names and resetting the interface version.
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Once the protocol is to be declared stable, the 'z' prefix and the
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version number in the protocol and interface names are removed and the
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interface version number is reset.
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</description>
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<interface name="zwp_input_method_v2" version="1">
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<description summary="input method">
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An input method object allows for clients to compose text.
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The objects connects the client to a text input in an application, and
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lets the client to serve as an input method for a seat.
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The zwp_input_method_v2 object can occupy two distinct states: active and
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inactive. In the active state, the object is associated to and
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communicates with a text input. In the inactive state, there is no
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associated text input, and the only communication is with the compositor.
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Initially, the input method is in the inactive state.
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Requests issued in the inactive state must be accepted by the compositor.
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Because of the serial mechanism, and the state reset on activate event,
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they will not have any effect on the state of the next text input.
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There must be no more than one input method object per seat.
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</description>
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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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</enum>
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<event name="activate">
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<description summary="input method has been requested">
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Notification that a text input focused on this seat requested the input
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method to be activated.
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This event serves the purpose of providing the compositor with an
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active input method.
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This event resets all state associated with previous enable, disable,
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surrounding_text, text_change_cause, and content_type events, as well
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as the state associated with set_preedit_string, commit_string, and
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delete_surrounding_text requests. In addition, it marks the
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zwp_input_method_v2 object as active, and makes any existing
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zwp_input_popup_surface_v2 objects visible.
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The surrounding_text, and content_type events must follow before the
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next done event if the text input supports the respective
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functionality.
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State set with this event is double-buffered. It will get applied on
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the next zwp_input_method_v2.done event, and stay valid until changed.
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</description>
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</event>
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<event name="deactivate">
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<description summary="deactivate event">
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Notification that no focused text input currently needs an active
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input method on this seat.
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This event marks the zwp_input_method_v2 object as inactive. The
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compositor must make all existing zwp_input_popup_surface_v2 objects
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invisible until the next activate event.
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State set with this event is double-buffered. It will get applied on
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the next zwp_input_method_v2.done event, and stay valid until changed.
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</description>
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</event>
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<event name="surrounding_text">
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<description summary="surrounding text event">
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Updates the surrounding plain text around the cursor, excluding the
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preedit text.
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If any preedit text is present, it is replaced with the cursor for the
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purpose of this event.
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The argument text is a buffer containing the preedit string, and must
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include the cursor position, and the complete selection. It should
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contain additional characters before and after these. There is a
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maximum length of wayland messages, so text can not be longer than 4000
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bytes.
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cursor is the byte offset of the cursor within the text buffer.
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anchor is the byte offset of the selection anchor within the text
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buffer. If there is no selected text, anchor must be the same as
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cursor.
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If this event does not arrive before the first done event, the input
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method may assume that the text input does not support this
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functionality and ignore following surrounding_text events.
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Values set with this event are double-buffered. They will get applied
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and set to initial values on the next zwp_input_method_v2.done
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event.
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The initial state for affected fields is empty, meaning that the text
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input does not support sending surrounding text. If the empty values
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get applied, subsequent attempts to change them may have no effect.
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</description>
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<arg name="text" type="string"/>
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<arg name="cursor" type="uint"/>
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<arg name="anchor" type="uint"/>
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</event>
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<event name="text_change_cause">
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<description summary="indicates the cause of surrounding text change">
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Tells the input method why the text surrounding the cursor changed.
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Whenever the client detects an external change in text, cursor, or
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anchor position, it must issue this request to the compositor. This
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request is intended to give the input method a chance to update the
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preedit text in an appropriate way, e.g. by removing it when the user
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starts typing with a keyboard.
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cause describes the source of the change.
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The value set with this event is double-buffered. It will get applied
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and set to its initial value on the next zwp_input_method_v2.done
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event.
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The initial value of cause is input_method.
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</description>
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<arg name="cause" type="uint" enum="zwp_text_input_v3.change_cause"/>
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</event>
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<event name="content_type">
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<description summary="content purpose and hint">
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Indicates the content type and hint for the current
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zwp_input_method_v2 instance.
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Values set with this event are double-buffered. They will get applied
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on the next zwp_input_method_v2.done event.
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The initial value for hint is none, and the initial value for purpose
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is normal.
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</description>
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<arg name="hint" type="uint" enum="zwp_text_input_v3.content_hint"/>
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<arg name="purpose" type="uint" enum="zwp_text_input_v3.content_purpose"/>
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</event>
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<event name="done">
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<description summary="apply state">
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Atomically applies state changes recently sent to the client.
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The done event establishes and updates the state of the client, and
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must be issued after any changes to apply them.
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Text input state (content purpose, content hint, surrounding text, and
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change cause) is conceptually double-buffered within an input method
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context.
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Events modify the pending state, as opposed to the current state in use
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by the input method. A done event atomically applies all pending state,
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replacing the current state. After done, the new pending state is as
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documented for each related request.
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Events must be applied in the order of arrival.
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Neither current nor pending state are modified unless noted otherwise.
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</description>
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</event>
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<request name="commit_string">
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<description summary="commit string">
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Send the commit string text for insertion to the application.
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Inserts a string at current cursor position (see commit event
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sequence). The string to commit could be either just a single character
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after a key press or the result of some composing.
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The argument text is a buffer containing the string to insert. There is
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a maximum length of wayland messages, so text can not be longer than
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4000 bytes.
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Values set with this event are double-buffered. They must be applied
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and reset to initial on the next zwp_text_input_v3.commit request.
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The initial value of text is an empty string.
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</description>
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<arg name="text" type="string"/>
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</request>
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<request name="set_preedit_string">
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<description summary="pre-edit string">
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Send the pre-edit string text to the application text input.
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Place a new composing text (pre-edit) at the current cursor position.
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Any previously set composing text must be removed. Any previously
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existing selected text must be removed. The cursor is moved to a new
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position within the preedit string.
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The argument text is a buffer containing the preedit string. There is
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a maximum length of wayland messages, so text can not be longer than
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4000 bytes.
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The arguments cursor_begin and cursor_end are counted in bytes relative
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to the beginning of the submitted string buffer. Cursor should be
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hidden by the text input when both are equal to -1.
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cursor_begin indicates the beginning of the cursor. cursor_end
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indicates the end of the cursor. It may be equal or different than
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cursor_begin.
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Values set with this event are double-buffered. They must be applied on
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the next zwp_input_method_v2.commit event.
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The initial value of text is an empty string. The initial value of
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cursor_begin, and cursor_end are both 0.
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</description>
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<arg name="text" type="string"/>
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<arg name="cursor_begin" type="int"/>
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<arg name="cursor_end" type="int"/>
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</request>
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<request name="delete_surrounding_text">
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<description summary="delete text">
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Remove the surrounding text.
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before_length and after_length are the number of bytes before and after
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the current cursor index (excluding the preedit text) to delete.
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If any preedit text is present, it is replaced with the cursor for the
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purpose of this event. In effect before_length is counted from the
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beginning of preedit text, and after_length from its end (see commit
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event sequence).
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Values set with this event are double-buffered. They must be applied
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and reset to initial on the next zwp_input_method_v2.commit request.
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The initial values of both before_length and after_length are 0.
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</description>
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<arg name="before_length" type="uint"/>
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<arg name="after_length" type="uint"/>
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</request>
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<request name="commit">
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<description summary="apply state">
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Apply state changes from commit_string, set_preedit_string and
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delete_surrounding_text requests.
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The state relating to these events is double-buffered, and each one
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modifies the pending state. This request replaces the current state
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with the pending state.
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The connected text input is expected to proceed by evaluating the
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changes in the following order:
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1. Replace existing preedit string with the cursor.
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2. Delete requested surrounding text.
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3. Insert commit string with the cursor at its end.
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4. Calculate surrounding text to send.
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5. Insert new preedit text in cursor position.
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6. Place cursor inside preedit text.
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The serial number reflects the last state of the zwp_input_method_v2
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object known to the client. The value of the serial argument must be
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equal to the number of done events already issued by that object. When
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the compositor receives a commit request with a serial different than
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the number of past done events, it must proceed as normal, except it
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should not change the current state of the zwp_input_method_v2 object.
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</description>
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<arg name="serial" type="uint"/>
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</request>
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<request name="get_input_popup_surface">
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<description summary="create popup surface">
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Creates a new zwp_input_popup_surface_v2 object wrapping a given
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surface.
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The surface gets assigned the "input_popup" role. If the surface
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already has an assigned role, the compositor must issue a protocol
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error.
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</description>
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<arg name="id" type="new_id" interface="zwp_input_popup_surface_v2"/>
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<arg name="surface" type="object" interface="wl_surface"/>
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</request>
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<request name="grab_keyboard">
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<description summary="grab hardware keyboard">
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Allow an input method to receive hardware keyboard input and process
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key events to generate text events (with pre-edit) over the wire. This
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allows input methods which compose multiple key events for inputting
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text like it is done for CJK languages.
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The compositor should send all keyboard events on the seat to the grab
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holder via the returned wl_keyboard object. Nevertheless, the
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compositor may decide not to forward any particular event. The
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compositor must not further process any event after it has been
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forwarded to the grab holder.
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Releasing the resulting wl_keyboard object releases the grab.
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</description>
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<arg name="keyboard" type="new_id"
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interface="zwp_input_method_keyboard_grab_v2"/>
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</request>
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<event name="unavailable">
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<description summary="input method unavailable">
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The input method ceased to be available.
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The compositor must issue this event as the only event on the object if
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there was another input_method object associated with the same seat at
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the time of its creation.
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The compositor must issue this request when the object is no longer
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usable, e.g. due to seat removal.
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The input method context becomes inert and should be destroyed after
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deactivation is handled. Any further requests and events except for the
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destroy request must be ignored.
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</description>
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</event>
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<request name="destroy" type="destructor">
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<description summary="destroy the text input">
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Destroys the zwp_text_input_v2 object and any associated child
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objects, i.e. zwp_input_popup_surface_v2 and
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zwp_input_method_keyboard_grab_v2.
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</description>
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</request>
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</interface>
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<interface name="zwp_input_popup_surface_v2" version="1">
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<description summary="popup surface">
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This interface marks a surface as a popup for interacting with an input
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method.
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The compositor should place it near the active text input area. It must
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be visible if and only if the input method is in the active state.
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The client must not destroy the underlying wl_surface while the
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zwp_input_popup_surface_v2 object exists.
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</description>
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<event name="text_input_rectangle">
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<description summary="set text input area position">
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Notify about the position of the area of the text input expressed as a
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rectangle in surface local coordinates.
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This is a hint to the input method telling it the relative position of
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the text being entered.
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</description>
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<arg name="x" type="int"/>
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<arg name="y" type="int"/>
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<arg name="width" type="int"/>
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<arg name="height" type="int"/>
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</event>
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<request name="destroy" type="destructor"/>
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</interface>
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<interface name="zwp_input_method_keyboard_grab_v2" version="1">
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<!-- Closely follows wl_keyboard version 6 -->
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<description summary="keyboard grab">
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The zwp_input_method_keyboard_grab_v2 interface represents an exclusive
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grab of the wl_keyboard interface associated with the seat.
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</description>
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<event name="keymap">
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<description summary="keyboard mapping">
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This event provides a file descriptor to the client which can be
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memory-mapped to provide a keyboard mapping description.
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</description>
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<arg name="format" type="uint" enum="wl_keyboard.keymap_format"
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summary="keymap format"/>
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<arg name="fd" type="fd" summary="keymap file descriptor"/>
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<arg name="size" type="uint" summary="keymap size, in bytes"/>
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</event>
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<event name="key">
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<description summary="key event">
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A key was pressed or released.
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The time argument is a timestamp with millisecond granularity, with an
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undefined base.
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</description>
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<arg name="serial" type="uint" summary="serial number of the key event"/>
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<arg name="time" type="uint" summary="timestamp with millisecond granularity"/>
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<arg name="key" type="uint" summary="key that produced the event"/>
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<arg name="state" type="uint" enum="wl_keyboard.key_state"
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summary="physical state of the key"/>
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</event>
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<event name="modifiers">
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<description summary="modifier and group state">
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Notifies clients that the modifier and/or group state has changed, and
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it should update its local state.
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</description>
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<arg name="serial" type="uint" summary="serial number of the modifiers event"/>
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<arg name="mods_depressed" type="uint" summary="depressed modifiers"/>
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<arg name="mods_latched" type="uint" summary="latched modifiers"/>
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<arg name="mods_locked" type="uint" summary="locked modifiers"/>
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<arg name="group" type="uint" summary="keyboard layout"/>
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</event>
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<request name="release" type="destructor">
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<description summary="release the grab object"/>
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</request>
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<event name="repeat_info">
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<description summary="repeat rate and delay">
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Informs the client about the keyboard's repeat rate and delay.
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This event is sent as soon as the zwp_input_method_keyboard_grab_v2
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object has been created, and is guaranteed to be received by the
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client before any key press event.
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Negative values for either rate or delay are illegal. A rate of zero
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will disable any repeating (regardless of the value of delay).
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This event can be sent later on as well with a new value if necessary,
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so clients should continue listening for the event past the creation
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of zwp_input_method_keyboard_grab_v2.
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</description>
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<arg name="rate" type="int"
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summary="the rate of repeating keys in characters per second"/>
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<arg name="delay" type="int"
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summary="delay in milliseconds since key down until repeating starts"/>
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</event>
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</interface>
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<interface name="zwp_input_method_manager_v2" version="1">
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<description summary="input method manager">
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The input method manager allows the client to become the input method on
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a chosen seat.
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No more than one input method must be associated with any seat at any
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given time.
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</description>
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<request name="get_input_method">
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<description summary="request an input method object">
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Request a new input zwp_input_method_v2 object associated with a given
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seat.
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</description>
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<arg name="seat" type="object" interface="wl_seat"/>
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<arg name="input_method" type="new_id" interface="zwp_input_method_v2"/>
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</request>
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<request name="destroy" type="destructor">
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<description summary="destroy the input method manager">
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Destroys the zwp_input_method_manager_v2 object.
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The zwp_input_method_v2 objects originating from it remain valid.
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</description>
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</request>
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</interface>
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</protocol>
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