425 lines
12 KiB
Rust
425 lines
12 KiB
Rust
/*! Manages zwp_input_method_v2 protocol.
|
|
*
|
|
* Library module.
|
|
*/
|
|
|
|
use std::boxed::Box;
|
|
use std::ffi::CString;
|
|
use std::fmt;
|
|
use std::num::Wrapping;
|
|
use std::string::String;
|
|
use std::time::Instant;
|
|
|
|
use crate::event_loop::driver;
|
|
use crate::state;
|
|
use crate::state::Event;
|
|
use ::logging;
|
|
use ::util::c::into_cstring;
|
|
|
|
// Traits
|
|
use std::convert::TryFrom;
|
|
use ::logging::Warn;
|
|
|
|
|
|
/// Gathers stuff defined in C or called by C
|
|
pub mod c {
|
|
use super::*;
|
|
|
|
use std::os::raw::{c_char, c_void};
|
|
use std::ptr;
|
|
|
|
// The following defined in C
|
|
|
|
/// struct zwp_input_method_v2*
|
|
#[repr(transparent)]
|
|
#[derive(PartialEq, Clone, Copy)]
|
|
pub struct InputMethod(*const c_void);
|
|
|
|
impl InputMethod {
|
|
pub fn is_null(&self) -> bool {
|
|
self.0.is_null()
|
|
}
|
|
pub fn null() -> Self {
|
|
Self(ptr::null())
|
|
}
|
|
}
|
|
|
|
extern "C" {
|
|
fn imservice_destroy_im(im: InputMethod);
|
|
|
|
#[allow(improper_ctypes)] // IMService will never be dereferenced in C
|
|
pub fn imservice_connect_listeners(im: InputMethod, imservice: *const IMService);
|
|
pub fn eek_input_method_commit_string(im: InputMethod, text: *const c_char);
|
|
pub fn eek_input_method_delete_surrounding_text(im: InputMethod, before: u32, after: u32);
|
|
pub fn eek_input_method_commit(im: InputMethod, serial: u32);
|
|
}
|
|
|
|
// The following defined in Rust. TODO: wrap naked pointers to Rust data inside RefCells to prevent multiple writers
|
|
|
|
// TODO: is unsafe needed here?
|
|
#[no_mangle]
|
|
pub extern "C"
|
|
fn imservice_handle_input_method_activate(imservice: *mut IMService,
|
|
im: InputMethod)
|
|
{
|
|
let imservice = check_imservice(imservice, im).unwrap();
|
|
imservice.preedit_string = String::new();
|
|
imservice.pending = IMProtocolState {
|
|
active: true,
|
|
..IMProtocolState::default()
|
|
};
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C"
|
|
fn imservice_handle_input_method_deactivate(imservice: *mut IMService,
|
|
im: InputMethod)
|
|
{
|
|
let imservice = check_imservice(imservice, im).unwrap();
|
|
imservice.pending = IMProtocolState {
|
|
active: false,
|
|
..imservice.pending.clone()
|
|
};
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C"
|
|
fn imservice_handle_surrounding_text(imservice: *mut IMService,
|
|
im: InputMethod,
|
|
text: *const c_char, cursor: u32, _anchor: u32)
|
|
{
|
|
let imservice = check_imservice(imservice, im).unwrap();
|
|
imservice.pending = IMProtocolState {
|
|
surrounding_text: into_cstring(text)
|
|
.expect("Received invalid string")
|
|
.expect("Received null string"),
|
|
surrounding_cursor: cursor,
|
|
..imservice.pending.clone()
|
|
};
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C"
|
|
fn imservice_handle_content_type(imservice: *mut IMService,
|
|
im: InputMethod,
|
|
hint: u32, purpose: u32)
|
|
{
|
|
let imservice = check_imservice(imservice, im).unwrap();
|
|
imservice.pending = IMProtocolState {
|
|
content_hint: {
|
|
ContentHint::from_bits(hint)
|
|
.or_print(
|
|
logging::Problem::Warning,
|
|
"Received invalid hint flags",
|
|
)
|
|
.unwrap_or(ContentHint::NONE)
|
|
},
|
|
content_purpose: {
|
|
ContentPurpose::try_from(purpose)
|
|
.or_print(
|
|
logging::Problem::Warning,
|
|
"Received invalid purpose value",
|
|
)
|
|
.unwrap_or(ContentPurpose::Normal)
|
|
},
|
|
..imservice.pending.clone()
|
|
};
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C"
|
|
fn imservice_handle_text_change_cause(imservice: *mut IMService,
|
|
im: InputMethod,
|
|
cause: u32)
|
|
{
|
|
let imservice = check_imservice(imservice, im).unwrap();
|
|
imservice.pending = IMProtocolState {
|
|
text_change_cause: {
|
|
ChangeCause::try_from(cause)
|
|
.or_print(
|
|
logging::Problem::Warning,
|
|
"Received invalid cause value",
|
|
)
|
|
.unwrap_or(ChangeCause::InputMethod)
|
|
},
|
|
..imservice.pending.clone()
|
|
};
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C"
|
|
fn imservice_handle_done(imservice: *mut IMService,
|
|
im: InputMethod)
|
|
{
|
|
let imservice = check_imservice(imservice, im).unwrap();
|
|
|
|
imservice.current = imservice.pending.clone();
|
|
imservice.serial += Wrapping(1u32);
|
|
imservice.send_event();
|
|
}
|
|
|
|
// TODO: this is really untested
|
|
#[no_mangle]
|
|
pub extern "C"
|
|
fn imservice_handle_unavailable(imservice: *mut IMService,
|
|
im: InputMethod)
|
|
{
|
|
let imservice = check_imservice(imservice, im).unwrap();
|
|
unsafe { imservice_destroy_im(im); }
|
|
|
|
// no need to care about proper double-buffering,
|
|
// the keyboard is already decommissioned
|
|
imservice.current.active = false;
|
|
|
|
imservice.send_event();
|
|
}
|
|
|
|
// FIXME: destroy and deallocate
|
|
|
|
// Helpers
|
|
|
|
/// Convenience method for referencing the IMService raw pointer,
|
|
/// and for verifying that the input method passed along
|
|
/// matches the one in the `imservice`.
|
|
///
|
|
/// The lifetime of the returned value is 'static,
|
|
/// due to the fact that the lifetime of a raw pointer is undefined.
|
|
/// Care must be take
|
|
/// not to exceed the lifetime of the pointer with the reference,
|
|
/// especially not to store it.
|
|
fn check_imservice(imservice: *mut IMService, im: InputMethod)
|
|
-> Result<&'static mut IMService, &'static str>
|
|
{
|
|
if imservice.is_null() {
|
|
return Err("Null imservice pointer");
|
|
}
|
|
let imservice: &mut IMService = unsafe { &mut *imservice };
|
|
if im == imservice.im {
|
|
Ok(imservice)
|
|
} else {
|
|
Err("Imservice doesn't contain the input method")
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
bitflags!{
|
|
/// Map to `text_input_unstable_v3.content_hint` values
|
|
pub struct ContentHint: u32 {
|
|
const NONE = 0x0;
|
|
const COMPLETION = 0x1;
|
|
const SPELLCHECK = 0x2;
|
|
const AUTO_CAPITALIZATION = 0x4;
|
|
const LOWERCASE = 0x8;
|
|
const UPPERCASE = 0x10;
|
|
const TITLECASE = 0x20;
|
|
const HIDDEN_TEXT = 0x40;
|
|
const SENSITIVE_DATA = 0x80;
|
|
const LATIN = 0x100;
|
|
const MULTILINE = 0x200;
|
|
}
|
|
}
|
|
|
|
/// Map to `text_input_unstable_v3.content_purpose` values
|
|
///
|
|
/// ```
|
|
/// use rs::imservice::ContentPurpose;
|
|
/// assert_eq!(ContentPurpose::Alpha as u32, 1);
|
|
/// ```
|
|
#[derive(Debug, Copy, Clone)]
|
|
pub enum ContentPurpose {
|
|
Normal = 0,
|
|
Alpha = 1,
|
|
Digits = 2,
|
|
Number = 3,
|
|
Phone = 4,
|
|
Url = 5,
|
|
Email = 6,
|
|
Name = 7,
|
|
Password = 8,
|
|
Pin = 9,
|
|
Date = 10,
|
|
Time = 11,
|
|
Datetime = 12,
|
|
Terminal = 13,
|
|
}
|
|
|
|
// Utilities from ::logging need a printable error type
|
|
pub struct UnrecognizedValue;
|
|
|
|
impl fmt::Display for UnrecognizedValue {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
write!(f, "Unrecognized value")
|
|
}
|
|
}
|
|
|
|
impl TryFrom<u32> for ContentPurpose {
|
|
type Error = UnrecognizedValue;
|
|
fn try_from(num: u32) -> Result<Self, Self::Error> {
|
|
use self::ContentPurpose::*;
|
|
match num {
|
|
0 => Ok(Normal),
|
|
1 => Ok(Alpha),
|
|
2 => Ok(Digits),
|
|
3 => Ok(Number),
|
|
4 => Ok(Phone),
|
|
5 => Ok(Url),
|
|
6 => Ok(Email),
|
|
7 => Ok(Name),
|
|
8 => Ok(Password),
|
|
9 => Ok(Pin),
|
|
10 => Ok(Date),
|
|
11 => Ok(Time),
|
|
12 => Ok(Datetime),
|
|
13 => Ok(Terminal),
|
|
_ => Err(UnrecognizedValue),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Map to `text_input_unstable_v3.change_cause` values
|
|
#[derive(Debug, Clone)]
|
|
pub enum ChangeCause {
|
|
InputMethod = 0,
|
|
Other = 1,
|
|
}
|
|
|
|
impl TryFrom<u32> for ChangeCause {
|
|
type Error = UnrecognizedValue;
|
|
fn try_from(num: u32) -> Result<Self, Self::Error> {
|
|
match num {
|
|
0 => Ok(ChangeCause::InputMethod),
|
|
1 => Ok(ChangeCause::Other),
|
|
_ => Err(UnrecognizedValue)
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Describes the desired state of the input method as requested by the server
|
|
#[derive(Clone)]
|
|
struct IMProtocolState {
|
|
surrounding_text: CString,
|
|
surrounding_cursor: u32,
|
|
content_purpose: ContentPurpose,
|
|
content_hint: ContentHint,
|
|
text_change_cause: ChangeCause,
|
|
active: bool,
|
|
}
|
|
|
|
impl Default for IMProtocolState {
|
|
fn default() -> IMProtocolState {
|
|
IMProtocolState {
|
|
surrounding_text: CString::default(),
|
|
surrounding_cursor: 0, // TODO: mark that there's no cursor
|
|
content_hint: ContentHint::NONE,
|
|
content_purpose: ContentPurpose::Normal,
|
|
text_change_cause: ChangeCause::InputMethod,
|
|
active: false,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub struct IMService {
|
|
/// Owned reference (still created and destroyed in C)
|
|
pub im: c::InputMethod,
|
|
sender: driver::Threaded,
|
|
|
|
pending: IMProtocolState,
|
|
current: IMProtocolState, // turn current into an idiomatic representation?
|
|
preedit_string: String,
|
|
serial: Wrapping<u32>,
|
|
}
|
|
|
|
pub enum SubmitError {
|
|
/// The input method had not been activated
|
|
NotActive,
|
|
}
|
|
|
|
impl IMService {
|
|
pub fn new(
|
|
im: c::InputMethod,
|
|
sender: driver::Threaded,
|
|
) -> Box<IMService> {
|
|
// IMService will be referenced to by C,
|
|
// so it needs to stay in the same place in memory via Box
|
|
let imservice = Box::new(IMService {
|
|
im,
|
|
sender,
|
|
pending: IMProtocolState::default(),
|
|
current: IMProtocolState::default(),
|
|
preedit_string: String::new(),
|
|
serial: Wrapping(0u32),
|
|
});
|
|
unsafe {
|
|
c::imservice_connect_listeners(
|
|
im,
|
|
imservice.as_ref() as *const IMService,
|
|
);
|
|
}
|
|
imservice
|
|
}
|
|
|
|
pub fn commit_string(&self, text: &CString) -> Result<(), SubmitError> {
|
|
match self.current.active {
|
|
true => {
|
|
unsafe {
|
|
c::eek_input_method_commit_string(self.im, text.as_ptr())
|
|
}
|
|
Ok(())
|
|
},
|
|
false => Err(SubmitError::NotActive),
|
|
}
|
|
}
|
|
|
|
pub fn delete_surrounding_text(
|
|
&self,
|
|
before: u32, after: u32,
|
|
) -> Result<(), SubmitError> {
|
|
match self.current.active {
|
|
true => {
|
|
unsafe {
|
|
c::eek_input_method_delete_surrounding_text(
|
|
self.im,
|
|
before, after,
|
|
)
|
|
}
|
|
Ok(())
|
|
},
|
|
false => Err(SubmitError::NotActive),
|
|
}
|
|
}
|
|
|
|
pub fn commit(&mut self) -> Result<(), SubmitError> {
|
|
match self.current.active {
|
|
true => {
|
|
unsafe {
|
|
c::eek_input_method_commit(self.im, self.serial.0)
|
|
}
|
|
Ok(())
|
|
},
|
|
false => Err(SubmitError::NotActive),
|
|
}
|
|
}
|
|
|
|
pub fn is_active(&self) -> bool {
|
|
self.current.active
|
|
}
|
|
|
|
fn send_event(&self) {
|
|
let state = &self.current;
|
|
let timestamp = Instant::now();
|
|
let message = if state.active {
|
|
state::InputMethod::Active(
|
|
state::InputMethodDetails {
|
|
hint: state.content_hint,
|
|
purpose: state.content_purpose,
|
|
}
|
|
)
|
|
} else {
|
|
state::InputMethod::InactiveSince(timestamp)
|
|
};
|
|
self.sender.send(Event::InputMethod(message))
|
|
.or_warn(&mut logging::Print, logging::Problem::Warning, "Can't send to state manager");
|
|
}
|
|
}
|