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// Copyright (c) 2022 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
use xso::{text::EmptyAsNone, AsXml, FromXml};
use crate::ns;
generate_attribute!(
/// Events for real-time text.
Event, "event", {
/// Begin a new real-time message.
New => "new",
/// Re-initialize the real-time message.
Reset => "reset",
/// Modify existing real-time message.
Edit => "edit",
/// Signals activation of real-time text.
Init => "init",
/// Signals deactivation of real-time text.
Cancel => "cancel",
}, Default = Edit
);
generate_attribute!(
/// The number of codepoints to erase.
Num, "n", u32, Default = 1
);
/// Choice between the three possible actions.
#[derive(FromXml, AsXml, Debug, Clone, PartialEq)]
#[xml(namespace = ns::RTT, exhaustive)]
pub enum Action {
/// Supports the transmission of text, including key presses, and text block inserts.
#[xml(name = "t")]
Insert {
/// Position in the message to start inserting from. If None, this means to start from the
/// end of the message.
#[xml(attribute(default, name = "p"))]
pos: Option<u32>,
/// Text to insert.
#[xml(text = EmptyAsNone)]
text: Option<String>,
},
/// Supports the behavior of backspace key presses. Text is removed towards beginning of the
/// message. This element is also used for all delete operations, including the backspace key,
/// the delete key, and text block deletes.
#[xml(name = "e")]
Erase {
/// Position in the message to start erasing from. If None, this means to start from the end
/// of the message.
#[xml(attribute(default))]
pos: Option<u32>,
/// Amount of characters to erase, to the left.
#[xml(attribute(default))]
num: Num,
},
/// Allow for the transmission of intervals, between real-time text actions, to recreate the
/// pauses between key presses.
#[xml(name = "w")]
Wait {
/// Amount of milliseconds to wait before the next action.
#[xml(attribute = "n")]
time: u32,
},
}
/// Element transmitted at regular interval by the sender client while a message is being composed.
#[derive(FromXml, AsXml, Debug, Clone, PartialEq)]
#[xml(namespace = ns::RTT, name = "rtt")]
pub struct Rtt {
/// Counter to maintain synchronisation of real-time text. Senders MUST increment this value
/// by 1 for each subsequent edit to the same real-time message, including when appending new
/// text. Receiving clients MUST monitor this 'seq' value as a lightweight verification on the
/// synchronization of real-time text messages. The bounds of 'seq' is 31-bits, the range of
/// positive values for a signed 32-bit integer.
#[xml(attribute)]
pub seq: u32,
/// This attribute signals events for real-time text.
#[xml(attribute(default))]
pub event: Event,
/// When editing a message using XEP-0308, this references the id of the message being edited.
#[xml(attribute(default))]
pub id: Option<String>,
/// Vector of actions being transmitted by this element.
#[xml(child(n = ..))]
pub actions: Vec<Action>,
}
#[cfg(test)]
mod tests {
use super::*;
use minidom::Element;
#[cfg(target_pointer_width = "32")]
#[test]
fn test_size() {
assert_size!(Event, 1);
assert_size!(Action, 20);
assert_size!(Rtt, 32);
}
#[cfg(target_pointer_width = "64")]
#[test]
fn test_size() {
assert_size!(Event, 1);
assert_size!(Action, 32);
assert_size!(Rtt, 56);
}
#[test]
fn simple() {
let elem: Element = "<rtt xmlns='urn:xmpp:rtt:0' seq='0'/>".parse().unwrap();
let rtt = Rtt::try_from(elem).unwrap();
assert_eq!(rtt.seq, 0);
assert_eq!(rtt.event, Event::Edit);
assert_eq!(rtt.id, None);
assert_eq!(rtt.actions.len(), 0);
}
#[test]
fn sequence() {
let elem: Element = "<rtt xmlns='urn:xmpp:rtt:0' seq='0' event='new'><t>Hello,</t><w n='50'/><e/><t>!</t></rtt>"
.parse()
.unwrap();
let rtt = Rtt::try_from(elem).unwrap();
assert_eq!(rtt.seq, 0);
assert_eq!(rtt.event, Event::New);
assert_eq!(rtt.id, None);
let mut actions = rtt.actions.into_iter();
assert_eq!(actions.len(), 4);
let Action::Insert { pos, text } = actions.next().unwrap() else {
panic!()
};
assert_eq!(pos, None);
assert_eq!(text.unwrap(), "Hello,");
let Action::Wait { time } = actions.next().unwrap() else {
panic!()
};
assert_eq!(time, 50);
let Action::Erase { pos, num } = actions.next().unwrap() else {
panic!()
};
assert_eq!(pos, None);
assert_eq!(num, Num(1));
let Action::Insert { pos, text } = actions.next().unwrap() else {
panic!()
};
assert_eq!(pos, None);
assert_eq!(text.unwrap(), "!");
}
}