ass_editor/events/
handler.rs

1//! Handler trait and channel configuration/statistics types.
2//!
3//! Declares the [`EventHandler`] trait implemented by observers along with the
4//! [`EventStats`] and [`EventChannelConfig`] value types used by the channel.
5
6use super::{DocumentEvent, EventFilter};
7use crate::core::Result;
8
9/// Event handler trait for responding to document events
10pub trait EventHandler: Send + Sync {
11    /// Handle a document event
12    fn handle_event(&mut self, event: &DocumentEvent) -> Result<()>;
13
14    /// Get the event filter for this handler
15    fn event_filter(&self) -> EventFilter {
16        EventFilter::new()
17    }
18
19    /// Get handler priority (higher numbers = higher priority)
20    fn priority(&self) -> i32 {
21        0
22    }
23}
24
25/// Statistics about event handling
26#[derive(Debug, Clone, PartialEq, Eq)]
27pub struct EventStats {
28    /// Total number of events dispatched
29    pub events_dispatched: usize,
30    /// Number of handlers currently registered
31    pub handlers_count: usize,
32    /// Number of events dropped due to filters
33    pub events_filtered: usize,
34    /// Number of async events queued
35    pub async_events_queued: usize,
36    /// Average event processing time in microseconds
37    pub avg_processing_time_us: u64,
38}
39
40/// Event channel configuration
41#[derive(Debug, Clone)]
42pub struct EventChannelConfig {
43    /// Maximum number of handlers
44    pub max_handlers: usize,
45    /// Maximum size of async event queue
46    pub max_async_queue_size: usize,
47    /// Whether to enable event batching
48    pub enable_batching: bool,
49    /// Maximum batch size for event processing
50    pub max_batch_size: usize,
51    /// Whether to log events for debugging
52    pub enable_logging: bool,
53}
54
55impl Default for EventChannelConfig {
56    fn default() -> Self {
57        Self {
58            max_handlers: 100,
59            max_async_queue_size: 1000,
60            enable_batching: false,
61            max_batch_size: 10,
62            enable_logging: false,
63        }
64    }
65}
ass_editor/events/handler.rs

ass_editor/events/
handler.rs
