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//! This module introduces struct [`TextObjects`], which manages definitions and events of caption texts.
use std::collections::{BTreeMap, HashMap, btree_map::Entry};
use crate::bms::{
parse::{Result, prompt::ChannelDuplication},
prelude::*,
};
#[derive(Debug, Default, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
/// This aggregate manages definitions and events of caption texts.
pub struct TextObjects {
/// Storage for `#TEXT` definitions
/// The texts corresponding to the id of the text object.
pub texts: HashMap<ObjId, String>,
/// Text events, indexed by time. `#xxx99:`
pub text_events: BTreeMap<ObjTime, TextObj>,
}
impl TextObjects {
/// Adds a new text object to the notes.
///
/// # Errors
///
/// Returns [`ParseWarning`] if a conflict is found and the
/// provided [`Prompter`] decides to treat it as an error.
pub fn push_text_event(
&mut self,
text_obj: TextObj,
prompt_handler: &impl Prompter,
) -> Result<()> {
match self.text_events.entry(text_obj.time) {
Entry::Vacant(entry) => {
entry.insert(text_obj);
Ok(())
}
Entry::Occupied(mut entry) => {
let existing = entry.get();
prompt_handler
.handle_channel_duplication(ChannelDuplication::TextEvent {
time: text_obj.time,
older: existing,
newer: &text_obj,
})
.apply_channel(
entry.get_mut(),
text_obj.clone(),
text_obj.time,
Channel::Text,
)
}
}
}
}