kozan_core/events/
ui_event.rs

1//! UI DOM events — Chrome: `blink/core/dom/events/ui_event.h`.
2//!
3//! DOM-level UI events (resize, scroll) dispatched through the tree.
4
5use kozan_macros::Event;
6
7/// DOM `scroll` event — fired when an element's scroll position changes.
8/// Does NOT bubble (per W3C spec).
9///
10/// Chrome: `Event` with type `"scroll"`.
11#[derive(Debug, Clone, Event)]
12#[event()]
13#[non_exhaustive]
14pub struct ScrollEvent {
15    /// Current horizontal scroll offset in CSS pixels.
16    pub scroll_x: f32,
17    /// Current vertical scroll offset in CSS pixels.
18    pub scroll_y: f32,
19}
20
21/// DOM `resize` event — fired when the viewport or element size changes.
22/// Does NOT bubble (per W3C spec).
23///
24/// Chrome: `UIEvent` with type `"resize"`.
25#[derive(Debug, Clone, Event)]
26#[event()]
27#[non_exhaustive]
28pub struct ResizeEvent {
29    /// New width in CSS pixels.
30    pub width: f32,
31    /// New height in CSS pixels.
32    pub height: f32,
33}
34
35#[cfg(test)]
36mod tests {
37    use super::*;
38    use crate::events::{Bubbles, Cancelable, Event};
39
40    #[test]
41    fn scroll_event_does_not_bubble() {
42        let evt = ScrollEvent {
43            scroll_x: 0.0,
44            scroll_y: 150.0,
45        };
46        assert_eq!(evt.bubbles(), Bubbles::No);
47        assert_eq!(evt.cancelable(), Cancelable::No);
48    }
49
50    #[test]
51    fn resize_event_does_not_bubble() {
52        let evt = ResizeEvent {
53            width: 1920.0,
54            height: 1080.0,
55        };
56        assert_eq!(evt.bubbles(), Bubbles::No);
57        assert_eq!(evt.cancelable(), Cancelable::No);
58    }
59}
kozan_core/events/ui_event.rs

kozan_core/events/
ui_event.rs
