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452 lines
21 KiB
452 lines
21 KiB
<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="text_input_unstable_v3">
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<copyright>
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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 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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<description summary="Protocol for composing text">
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This protocol allows compositors to act as input methods and to send text
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to applications. A text input object is used to manage state of what are
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typically text entry fields in the application.
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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_text_input_v3" version="1">
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<description summary="text input">
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The zwp_text_input_v3 interface represents text input and input methods
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associated with a seat. It provides enter/leave events to follow the
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text input focus for a seat.
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Requests are used to enable/disable the text-input object and set
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state information like surrounding and selected text or the content type.
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The information about the entered text is sent to the text-input object
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via the preedit_string and commit_string events.
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Text is valid UTF-8 encoded, indices and lengths are in bytes. Indices
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must not point to middle bytes inside a code point: they must either
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point to the first byte of a code point or to the end of the buffer.
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Lengths must be measured between two valid indices.
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Focus moving throughout surfaces will result in the emission of
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zwp_text_input_v3.enter and zwp_text_input_v3.leave events. The focused
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surface must commit zwp_text_input_v3.enable and
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zwp_text_input_v3.disable requests as the keyboard focus moves across
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editable and non-editable elements of the UI. Those two requests are not
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expected to be paired with each other, the compositor must be able to
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handle consecutive series of the same request.
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State is sent by the state requests (set_surrounding_text,
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set_content_type and set_cursor_rectangle) and a commit request. After an
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enter event or disable request all state information is invalidated and
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needs to be resent by the client.
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</description>
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<request name="destroy" type="destructor">
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<description summary="Destroy the wp_text_input">
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Destroy the wp_text_input object. Also disables all surfaces enabled
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through this wp_text_input object.
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</description>
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</request>
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<request name="enable">
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<description summary="Request text input to be enabled">
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Requests text input on the surface previously obtained from the enter
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event.
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This request must be issued every time the active text input changes
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to a new one, including within the current surface. Use
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zwp_text_input_v3.disable when there is no longer any input focus on
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the current surface.
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Clients must not enable more than one text input on the single seat
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and should disable the current text input before enabling the new one.
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At most one instance of text input may be in enabled state per instance,
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Requests to enable the another text input when some text input is active
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must be ignored by compositor.
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This request resets all state associated with previous enable, disable,
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set_surrounding_text, set_text_change_cause, set_content_type, and
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set_cursor_rectangle requests, as well as the state associated with
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preedit_string, commit_string, and delete_surrounding_text events.
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The set_surrounding_text, set_content_type and set_cursor_rectangle
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requests must follow if the text input supports the necessary
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functionality.
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State set with this request is double-buffered. It will get applied on
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the next zwp_text_input_v3.commit request, and stay valid until the
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next committed enable or disable request.
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The changes must be applied by the compositor after issuing a
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zwp_text_input_v3.commit request.
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</description>
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</request>
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<request name="disable">
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<description summary="Disable text input on a surface">
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Explicitly disable text input on the current surface (typically when
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there is no focus on any text entry inside the surface).
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State set with this request is double-buffered. It will get applied on
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the next zwp_text_input_v3.commit request.
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</description>
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</request>
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<request name="set_surrounding_text">
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<description summary="sets the surrounding text">
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Sets the surrounding plain text around the input, excluding the preedit
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text.
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The client should notify the compositor of any changes in any of the
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values carried with this request, including changes caused by handling
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incoming text-input events as well as changes caused by other
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mechanisms like keyboard typing.
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If the client is unaware of the text around the cursor, it should not
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issue this request, to signify lack of support to the compositor.
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Text is UTF-8 encoded, and should include the cursor position, the
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complete selection and additional characters before and after them.
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There is a maximum length of wayland messages, so text can not be
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longer than 4000 bytes.
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Cursor is the byte offset of the cursor within text buffer.
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Anchor is the byte offset of the selection anchor within text buffer.
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If there is no selected text, anchor is the same as cursor.
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If any preedit text is present, it is replaced with a cursor for the
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purpose of this event.
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Values set with this request are double-buffered. They will get applied
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on the next zwp_text_input_v3.commit request, and stay valid until the
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next committed enable or disable request.
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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="int"/>
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<arg name="anchor" type="int"/>
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</request>
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<enum name="change_cause">
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<description summary="text change reason">
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Reason for the change of surrounding text or cursor posision.
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</description>
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<entry name="input_method" value="0" summary="input method caused the change"/>
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<entry name="other" value="1" summary="something else than the input method caused the change"/>
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</enum>
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<request name="set_text_change_cause">
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<description summary="indicates the cause of surrounding text change">
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Tells the compositor 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 posision, 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 request is double-buffered. It must be applied
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and reset to initial at the next zwp_text_input_v3.commit request.
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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="change_cause"/>
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</request>
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<enum name="content_hint" bitfield="true">
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<description summary="content hint">
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Content hint is a bitmask to allow to modify the behavior of the text
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input.
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</description>
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<entry name="none" value="0x0" summary="no special behavior"/>
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<entry name="completion" value="0x1" summary="suggest word completions"/>
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<entry name="spellcheck" value="0x2" summary="suggest word corrections"/>
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<entry name="auto_capitalization" value="0x4" summary="switch to uppercase letters at the start of a sentence"/>
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<entry name="lowercase" value="0x8" summary="prefer lowercase letters"/>
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<entry name="uppercase" value="0x10" summary="prefer uppercase letters"/>
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<entry name="titlecase" value="0x20" summary="prefer casing for titles and headings (can be language dependent)"/>
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<entry name="hidden_text" value="0x40" summary="characters should be hidden"/>
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<entry name="sensitive_data" value="0x80" summary="typed text should not be stored"/>
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<entry name="latin" value="0x100" summary="just Latin characters should be entered"/>
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<entry name="multiline" value="0x200" summary="the text input is multiline"/>
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</enum>
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<enum name="content_purpose">
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<description summary="content purpose">
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The content purpose allows to specify the primary purpose of a text
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input.
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This allows an input method to show special purpose input panels with
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extra characters or to disallow some characters.
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</description>
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<entry name="normal" value="0" summary="default input, allowing all characters"/>
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<entry name="alpha" value="1" summary="allow only alphabetic characters"/>
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<entry name="digits" value="2" summary="allow only digits"/>
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<entry name="number" value="3" summary="input a number (including decimal separator and sign)"/>
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<entry name="phone" value="4" summary="input a phone number"/>
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<entry name="url" value="5" summary="input an URL"/>
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<entry name="email" value="6" summary="input an email address"/>
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<entry name="name" value="7" summary="input a name of a person"/>
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<entry name="password" value="8" summary="input a password (combine with sensitive_data hint)"/>
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<entry name="pin" value="9" summary="input is a numeric password (combine with sensitive_data hint)"/>
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<entry name="date" value="10" summary="input a date"/>
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<entry name="time" value="11" summary="input a time"/>
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<entry name="datetime" value="12" summary="input a date and time"/>
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<entry name="terminal" value="13" summary="input for a terminal"/>
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</enum>
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<request name="set_content_type">
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<description summary="set content purpose and hint">
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Sets the content purpose and content hint. While the purpose is the
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basic purpose of an input field, the hint flags allow to modify some of
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the behavior.
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Values set with this request are double-buffered. They will get applied
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on the next zwp_text_input_v3.commit request.
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Subsequent attempts to update them may have no effect. The values
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remain valid until the next committed enable or disable request.
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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="content_hint"/>
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<arg name="purpose" type="uint" enum="content_purpose"/>
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</request>
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<request name="set_cursor_rectangle">
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<description summary="set cursor position">
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Marks an area around the cursor as a x, y, width, height rectangle in
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surface local coordinates.
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Allows the compositor to put a window with word suggestions near the
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cursor, without obstructing the text being input.
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If the client is unaware of the position of edited text, it should not
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issue this request, to signify lack of support to the compositor.
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Values set with this request are double-buffered. They will get applied
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on the next zwp_text_input_v3.commit request, and stay valid until the
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next committed enable or disable request.
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The initial values describing a cursor rectangle are empty. That means
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the text input does not support describing the cursor area. If the
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empty values get applied, subsequent attempts to change them may have
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no effect.
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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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</request>
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<request name="commit">
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<description summary="commit state">
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Atomically applies state changes recently sent to the compositor.
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The commit request 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 (enabled status, content purpose, content hint,
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surrounding text and change cause, cursor rectangle) is conceptually
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double-buffered within the context of a text input, i.e. between a
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committed enable request and the following committed enable or disable
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request.
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Protocol requests modify the pending state, as opposed to the current
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state in use by the input method. A commit request atomically applies
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all pending state, replacing the current state. After commit, the new
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pending state is as documented for each related request.
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Requests are applied in the order of arrival.
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Neither current nor pending state are modified unless noted otherwise.
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The compositor must count the number of commit requests coming from
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each zwp_text_input_v3 object and use the count as the serial in done
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events.
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</description>
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</request>
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<event name="enter">
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<description summary="enter event">
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Notification that this seat's text-input focus is on a certain surface.
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If client has created multiple text input objects, compositor must send
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this event to all of them.
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When the seat has the keyboard capability the text-input focus follows
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the keyboard focus. This event sets the current surface for the
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text-input object.
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</description>
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<arg name="surface" type="object" interface="wl_surface"/>
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</event>
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<event name="leave">
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<description summary="leave event">
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Notification that this seat's text-input focus is no longer on a
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certain surface. The client should reset any preedit string previously
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set.
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The leave notification clears the current surface. It is sent before
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the enter notification for the new focus. After leave event, compositor
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must ignore requests from any text input instances until next enter
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event.
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When the seat has the keyboard capability the text-input focus follows
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the keyboard focus.
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</description>
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<arg name="surface" type="object" interface="wl_surface"/>
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</event>
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<event name="preedit_string">
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<description summary="pre-edit">
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Notify when a new composing text (pre-edit) should be set at the
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current cursor position. Any previously set composing text must be
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removed. Any previously existing selected text must be removed.
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The argument text contains the pre-edit string buffer.
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The parameters cursor_begin and cursor_end are counted in bytes
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relative to the beginning of the submitted text buffer. Cursor should
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be hidden when both are equal to -1.
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They could be represented by the client as a line if both values are
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the same, or as a text highlight otherwise.
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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.done event.
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The initial value of text is an empty string, and cursor_begin,
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cursor_end and cursor_hidden are all 0.
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</description>
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<arg name="text" type="string" allow-null="true"/>
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<arg name="cursor_begin" type="int"/>
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<arg name="cursor_end" type="int"/>
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</event>
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<event name="commit_string">
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<description summary="text commit">
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Notify when text should be inserted into the editor widget. The text to
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commit could be either just a single character after a key press or the
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result of some composing (pre-edit).
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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.done event.
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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" allow-null="true"/>
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</event>
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<event name="delete_surrounding_text">
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<description summary="delete surrounding text">
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Notify when the text around the current cursor position should be
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deleted.
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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 selection) to delete.
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If a preedit text is present, in effect before_length is counted from
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the beginning of it, and after_length from its end (see done event
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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_text_input_v3.done event.
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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" summary="length of text before current cursor position"/>
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<arg name="after_length" type="uint" summary="length of text after current cursor position"/>
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</event>
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<event name="done">
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<description summary="apply changes">
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Instruct the application to apply changes to state requested by the
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preedit_string, commit_string and delete_surrounding_text events. The
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state relating to these events is double-buffered, and each one
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modifies the pending state. This event replaces the current state with
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the pending state.
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The application must proceed by evaluating the changes in the following
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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_text_input_v3
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object known to the compositor. The value of the serial argument must
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be equal to the number of commit requests already issued on that object.
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When the client receives a done event with a serial different than the
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number of past commit requests, it must proceed as normal, except it
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should not change the current state of the zwp_text_input_v3 object.
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</description>
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<arg name="serial" type="uint"/>
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</event>
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</interface>
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<interface name="zwp_text_input_manager_v3" version="1">
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<description summary="text input manager">
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A factory for text-input objects. This object is a global singleton.
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</description>
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<request name="destroy" type="destructor">
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<description summary="Destroy the wp_text_input_manager">
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Destroy the wp_text_input_manager object.
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</description>
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</request>
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<request name="get_text_input">
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<description summary="create a new text input object">
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Creates a new text-input object for a given seat.
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</description>
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<arg name="id" type="new_id" interface="zwp_text_input_v3"/>
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<arg name="seat" type="object" interface="wl_seat"/>
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</request>
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</interface>
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</protocol>
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