52 lines
1.5 KiB
Rust
52 lines
1.5 KiB
Rust
#[cfg(feature = "serde")]
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use serde::{Deserialize, Serialize};
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use crate::{operation_transformation::Operation, Token};
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#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
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#[derive(Debug, Clone, PartialEq)]
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pub struct OrderedOperation<T>
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where
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T: PartialEq + Clone + std::fmt::Debug,
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{
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pub order: usize,
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pub operation: Operation<T>,
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}
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impl<T> OrderedOperation<T>
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where
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T: PartialEq + Clone + std::fmt::Debug,
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{
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pub fn get_sort_key(&self) -> (usize, usize, usize, String) {
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(
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self.order,
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match &self.operation {
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Operation::Delete { .. } => 1,
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Operation::Insert { .. } => 2,
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Operation::Equal { .. } => 3,
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},
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self.operation.start_index(),
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// Make sure that the ordering is deterministic regardless of which text
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// is left or right.
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match &self.operation {
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Operation::Equal { index, .. } => index.to_string(),
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Operation::Insert { text, .. } => {
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text.iter().map(Token::original).collect::<String>()
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}
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Operation::Delete {
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deleted_character_count,
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..
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} => deleted_character_count.to_string(),
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},
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)
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}
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}
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impl<T> PartialOrd for OrderedOperation<T>
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where
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T: PartialEq + Clone + std::fmt::Debug,
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{
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fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
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self.get_sort_key().partial_cmp(&other.get_sort_key())
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}
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}
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