SPDX-FileCopyrightText: 2012, 2013 Intel Corporation SPDX-FileCopyrightText: 2015, 2016 Jan Arne Petersen SPDX-License-Identifier: MIT-CMU The zwp_text_input_v2 interface represents text input and input methods associated with a seat. It provides enter/leave events to follow the text input focus for a seat. Requests are used to enable/disable the text-input object and set state information like surrounding and selected text or the content type. The information about the entered text is sent to the text-input object via the pre-edit and commit events. Using this interface removes the need for applications to directly process hardware key events and compose text out of them. Text is valid UTF-8 encoded, indices and lengths are in bytes. Indices have to always point to the first byte of an UTF-8 encoded code point. Lengths are not allowed to contain just a part of an UTF-8 encoded code point. State is sent by the state requests (set_surrounding_text, set_content_type, set_cursor_rectangle and set_preferred_language) and an update_state request. After an enter or an input_method_change event all state information is invalidated and needs to be resent from the client. A reset or entering a new widget on client side also invalidates all current state information. Destroy the wp_text_input object. Also disables all surfaces enabled through this wp_text_input object Enable text input in a surface (usually when a text entry inside of it has focus). This can be called before or after a surface gets text (or keyboard) focus via the enter event. Text input to a surface is only active when it has the current text (or keyboard) focus and is enabled. Disable text input in a surface (typically when there is no focus on any text entry inside the surface). Requests input panels (virtual keyboard) to show. This should be used for example to show a virtual keyboard again (with a tap) after it was closed by pressing on a close button on the keyboard. Requests input panels (virtual keyboard) to hide. Sets the plain surrounding text around the input position. Text is UTF-8 encoded. Cursor is the byte offset within the surrounding text. Anchor is the byte offset of the selection anchor within the surrounding text. If there is no selected text, anchor is the same as cursor. Make sure to always send some text before and after the cursor except when the cursor is at the beginning or end of text. When there was a configure_surrounding_text event take the before_cursor and after_cursor arguments into account for picking how much surrounding text to send. There is a maximum length of wayland messages so text can not be longer than 4000 bytes. Content hint is a bitmask to allow to modify the behavior of the text input. The content purpose allows to specify the primary purpose of a text input. This allows an input method to show special purpose input panels with extra characters or to disallow some characters. Sets the content purpose and content hint. While the purpose is the basic purpose of an input field, the hint flags allow to modify some of the behavior. When no content type is explicitly set, a normal content purpose with none hint should be assumed. Sets the cursor outline as a x, y, width, height rectangle in surface local coordinates. Allows the compositor to put a window with word suggestions near the cursor. Sets a specific language. This allows for example a virtual keyboard to show a language specific layout. The "language" argument is a RFC-3066 format language tag. It could be used for example in a word processor to indicate language of currently edited document or in an instant message application which tracks languages of contacts. Defines the reason for sending an updated state. Allows to atomically send state updates from client. This request should follow after a batch of state updating requests like set_surrounding_text, set_content_type, set_cursor_rectangle and set_preferred_language. The flags field indicates why an updated state is sent to the input method. Reset should be used by an editor widget after the text was changed outside of the normal input method flow. For "change" it is enough to send the changed state, else the full state should be send. Serial should be set to the serial from the last enter or input_method_changed event. To make sure to not receive outdated input method events after a reset or switching to a new widget wl_display_sync() should be used after update_state in these cases. Notification that this seat's text-input focus is on a certain surface. When the seat has the keyboard capability the text-input focus follows the keyboard focus. Notification that this seat's text-input focus is no longer on a certain surface. The leave notification is sent before the enter notification for the new focus. When the seat has the keyboard capability the text-input focus follows the keyboard focus. Notification that the visibility of the input panel (virtual keyboard) changed. The rectangle x, y, width, height defines the area overlapped by the input panel (virtual keyboard) on the surface having the text focus in surface local coordinates. That can be used to make sure widgets are visible and not covered by a virtual keyboard. Notify when a new composing text (pre-edit) should be set around the current cursor position. Any previously set composing text should be removed. The commit text can be used to replace the composing text in some cases (for example when losing focus). The text input should also handle all preedit_style and preedit_cursor events occurring directly before preedit_string. Sets styling information on composing text. The style is applied for length bytes from index relative to the beginning of the composing text (as byte offset). Multiple styles can be applied to a composing text by sending multiple preedit_styling events. This event is handled as part of a following preedit_string event. Sets the cursor position inside the composing text (as byte offset) relative to the start of the composing text. When index is a negative number no cursor is shown. When no preedit_cursor event is sent the cursor will be at the end of the composing text by default. This event is handled as part of a following preedit_string event. Notify when text should be inserted into the editor widget. 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 should be removed. Notify when the cursor or anchor position should be modified. This event should be handled as part of a following commit_string event. The text between anchor and index should be selected. Notify when the text around the current cursor position should be deleted. BeforeLength and afterLength is the length (in bytes) of text before and after the current cursor position (excluding the selection) to delete. This event should be handled as part of a following commit_string or preedit_string event. Transfer an array of 0-terminated modifiers names. The position in the array is the index of the modifier as used in the modifiers bitmask in the keysym event. 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_surrounding_text, etc. The key event follows the wl_keyboard key event convention. Sym is a XKB keysym, state a wl_keyboard key_state. Modifiers are a mask for effective modifiers (where the modifier indices are set by the modifiers_map event) Sets the language of the input text. The "language" argument is a RFC-3066 format language tag. Sets the text direction of input text. It is mainly needed for showing input cursor on correct side of the editor when there is no input yet done and making sure neutral direction text is laid out properly. Configure what amount of surrounding text is expected by the input method. The surrounding text will be sent in the set_surrounding_text request on the following state information updates. The input method changed on compositor side, which invalidates all current state information. New state information should be sent from the client via state requests (set_surrounding_text, set_content_hint, ...) and update_state. A factory for text-input objects. This object is a global singleton. Destroy the wp_text_input_manager object. Creates a new text-input object for a given seat.