<?xml version="1.0" encoding="UTF-8"?>
<protocol name="input_method">

  <copyright>
    Copyright © 2012, 2013 Intel Corporation

    Permission to use, copy, modify, distribute, and sell this
    software and its documentation for any purpose is hereby granted
    without fee, provided that the above copyright notice appear in
    all copies and that both that copyright notice and this permission
    notice appear in supporting documentation, and that the name of
    the copyright holders not be used in advertising or publicity
    pertaining to distribution of the software without specific,
    written prior permission.  The copyright holders make no
    representations about the suitability of this software for any
    purpose.  It is provided "as is" without express or implied
    warranty.

    THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
    SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
    FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
    SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
    AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
    ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
    THIS SOFTWARE.
  </copyright>

  <interface name="wl_input_method_context" version="1">
    <description summary="input method context">
      Corresponds to a text input on input method side. An input method context
      is created on text input activation on the input method side. It allows to
      receive information about the text input from the application via events.
      Input method contexts do not keep state after deactivation and should be
      destroyed after deactivation is handled.

      Text is generally UTF-8 encoded, indices and lengths are in bytes.

      Serials are used to synchronize the state between the text input and
      an input method. New serials are sent by the text input in the
      commit_state request and are used by the input method to indicate
      the known text input state in events like preedit_string, commit_string,
      and keysym. The text input can then ignore events from the input method
      which are based on an outdated state (for example after a reset).
    </description>

    <request name="destroy" type="destructor"/>

    <request name="commit_string">
      <description summary="commit string">
        Send the commit string text for insertion to the application.

        The text to commit could be either just a single character after a key
        press or the result of some composing (pre-edit). It could be also an
        empty text when some text should be removed (see
        delete_surrounding_text) or when the input cursor should be moved (see
        cursor_position).

        Any previously set composing text will be removed.
      </description>
      <arg name="serial" type="uint" summary="serial of the latest known text input state"/>
      <arg name="text" type="string"/>
    </request>

    <request name="preedit_string">
      <description summary="pre-edit string">
        Send the pre-edit string text to the application text input.

        The commit text can be used to replace the preedit text on reset (for
        example on unfocus).

        Also previously sent preedit_style and preedit_cursor requests are
        processed bt the text_input also.
      </description>
      <arg name="serial" type="uint" summary="serial of the latest known text input state"/>
      <arg name="text" type="string"/>
      <arg name="commit" type="string"/>
    </request>

    <request name="preedit_styling">
      <description summary="pre-edit styling">
        Sets styling information on composing text. The style is applied for
	length in bytes from index relative to the beginning of
	the composing text (as byte offset). Multiple styles can
	be applied to a composing text.

        This request should be sent before sending preedit_string request.
      </description>
      <arg name="index" type="uint"/>
      <arg name="length" type="uint"/>
      <arg name="style" type="uint"/>
    </request>

    <request name="preedit_cursor">
      <description summary="pre-edit cursor">
        Sets the cursor position inside the composing text (as byte offset)
        relative to the start of the composing text.

        When index is negative no cursor should be displayed.

        This request should be sent before sending preedit_string request.
      </description>
      <arg name="index" type="int"/>
    </request>

    <request name="delete_surrounding_text">
      <description summary="delete text">
        This request will be handled on text_input side as part of a directly
        following commit_string request.
      </description>
      <arg name="index" type="int"/>
      <arg name="length" type="uint"/>
    </request>

    <request name="cursor_position">
      <description summary="set cursor to a new position">
        Sets the cursor and anchor to a new position. Index is the new cursor
        position in bytes (when >= 0 relative to the end of inserted text
        else relative to beginning of inserted text). Anchor is the new anchor
        position in bytes (when >= 0 relative to the end of inserted text, else
        relative to beginning of inserted text). When there should be no
        selected text anchor should be the same as index.

        This request will be handled on text_input side as part of a directly
        following commit_string request.
      </description>
      <arg name="index" type="int"/>
      <arg name="anchor" type="int"/>
    </request>

    <request name="modifiers_map">
      <arg name="map" type="array"/>
    </request>

    <request name="keysym">
      <description summary="keysym">
        Notify when a key event was sent. Key events should not be used for
        normal text input operations, which should be done with commit_string,
        delete_surrounfing_text, etc. The key event follows the wl_keyboard key
        event convention. Sym is a XKB keysym, state a wl_keyboard key_state.
      </description>
      <arg name="serial" type="uint" summary="serial of the latest known text input state"/>
      <arg name="time" type="uint"/>
      <arg name="sym" type="uint"/>
      <arg name="state" type="uint"/>
      <arg name="modifiers" type="uint"/>
    </request>

    <request name="grab_keyboard">
      <description summary="grab hardware keyboard">
        Allows an input method to receive hardware keyboard input and process
        key events to generate text events (with pre-edit) over the wire. This
        allows input methods which compose multiple key events for inputting
        text like it is done for CJK languages.
      </description>
      <arg name="keyboard" type="new_id" interface="wl_keyboard"/>
    </request>

    <request name="key">
      <description summary="forward key event">
        Should be used when filtering key events with grab_keyboard.

        When the wl_keyboard::key event is not processed by the input
        method itself and should be sent to the client instead, forward it
        with this request. The arguments should be the ones from the
        wl_keyboard::key event.

        For generating custom key events use the keysym request instead.
      </description>
      <arg name="serial" type="uint" summary="serial from wl_keyboard::key"/>
      <arg name="time" type="uint" summary="time from wl_keyboard::key"/>
      <arg name="key" type="uint" summary="key from wl_keyboard::key"/>
      <arg name="state" type="uint" summary="state from wl_keyboard::key"/>
    </request>

    <request name="modifiers">
      <description summary="forward modifiers event">
        Should be used when filtering key events with grab_keyboard.

        When the wl_keyboard::modifiers event should be also send to the
        client, forward it with this request. The arguments should be the ones
        from the wl_keyboard::modifiers event.
      </description>
      <arg name="serial" type="uint" summary="serial from wl_keyboard::modifiers"/>
      <arg name="mods_depressed" type="uint" summary="mods_depressed from wl_keyboard::modifiers"/>
      <arg name="mods_latched" type="uint" summary="mods_latched from wl_keyboard::modifiers"/>
      <arg name="mods_locked" type="uint" summary="mods_locked from wl_keyboard::modifiers"/>
      <arg name="group" type="uint" summary="group from wl_keyboard::modifiers"/>
    </request>

    <request name="language">
      <arg name="serial" type="uint" summary="serial of the latest known text input state"/>
      <arg name="language" type="string"/>
    </request>
    <request name="text_direction">
      <arg name="serial" type="uint" summary="serial of the latest known text input state"/>
      <arg name="direction" type="uint"/>
    </request>

    <event name="surrounding_text">
      <description summary="surrounding text event">
        The plain surrounding text around the input position. Cursor is the
        position in bytes within the surrounding text relative to the beginning
        of the text. Anchor is the position in bytes of the selection anchor
        within the surrounding text relative to the beginning of the text. If
        there is no selected text anchor is the same as cursor.
      </description>
      <arg name="text" type="string"/>
      <arg name="cursor" type="uint"/>
      <arg name="anchor" type="uint"/>
    </event>

    <event name="reset">
    </event>

    <event name="content_type">
      <arg name="hint" type="uint"/>
      <arg name="purpose" type="uint"/>
    </event>

    <event name="invoke_action">
      <arg name="button" type="uint"/>
      <arg name="index" type="uint"/>
    </event>

    <event name="commit_state">
      <arg name="serial" type="uint" summary="serial of text input state"/>
    </event>

    <event name="preferred_language">
      <arg name="language" type="string"/>
    </event>
  </interface>

  <interface name="wl_input_method" version="1">
    <description summary="input method">
      An input method object is responsible to compose text in response to
      input from hardware or virtual keyboards. There is one input method
      object per seat. On activate there is a new input method context object
      created which allows the input method to communicate with the text input.
    </description>

    <event name="activate">
      <description summary="activate event">
        A text input was activated. Creates an input method context object
        which allows communication with the text input.
      </description>
      <arg name="id" type="new_id" interface="wl_input_method_context"/>
    </event>

    <event name="deactivate">
      <description summary="deactivate event">
        The text input corresponding to the context argument was deactivated.
        The input method context should be destroyed after deactivation is
        handled.
      </description>
      <arg name="context" type="object" interface="wl_input_method_context"/>
    </event>
  </interface>

  <interface name="wl_input_panel" version="1">
    <description summary="interface for implementing keyboards">
      Only one client can bind this interface at a time.
    </description>

    <request name="get_input_panel_surface">
      <arg name="id" type="new_id" interface="wl_input_panel_surface"/>
      <arg name="surface" type="object" interface="wl_surface"/>
    </request>
  </interface>

  <interface name="wl_input_panel_surface" version="1">
    <enum name="position">
      <entry name="center_bottom" value="0"/>
    </enum>

    <request name="set_toplevel">
      <description summary="set the surface type as a keyboard">
        A keyboard surface is only shown when a text input is active.
      </description>
      <arg name="output" type="object" interface="wl_output"/>
      <arg name="position" type="uint"/>
    </request>

    <request name="set_overlay_panel">
      <description summary="set the surface type as an overlay panel">
        An overlay panel is shown near the input cursor above the application
        window when a text input is active.
      </description>
    </request>
  </interface>

</protocol>
