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//! Multi-click sequence tracking.
use web_time::Instant;
use super::UiState;
use super::types::{ClickSequence, MULTI_CLICK_DIST, MULTI_CLICK_TIME};
impl UiState {
/// Resolve the click count for a fresh primary-button press at
/// `(x, y)` and update the runtime's last-click record. Increments
/// the count when this press extends a multi-click sequence (same
/// target, within `MULTI_CLICK_TIME` and `MULTI_CLICK_DIST` of the
/// previous press); otherwise resets to 1.
pub(crate) fn next_click_count(
&mut self,
now: Instant,
pos: (f32, f32),
target_node_id: Option<&str>,
) -> u8 {
let mut count = 1;
if let Some(prev) = self.click.last.as_ref() {
let dt = now.saturating_duration_since(prev.time);
let dx = pos.0 - prev.pos.0;
let dy = pos.1 - prev.pos.1;
let same_target = match (prev.target_node_id.as_deref(), target_node_id) {
(Some(a), Some(b)) => a == b,
_ => false,
};
if same_target
&& dt < MULTI_CLICK_TIME
&& (dx * dx + dy * dy).sqrt() <= MULTI_CLICK_DIST
{
count = prev.count.saturating_add(1);
}
}
self.click.last = Some(ClickSequence {
time: now,
pos,
target_node_id: target_node_id.map(str::to_owned),
count,
});
count
}
/// Current click count of the most recent primary press, or 1 if
/// no press has happened yet. Used by `pointer_up` to stamp the
/// matching `PointerUp` / `Click` events with the same count their
/// originating `PointerDown` carried.
pub(crate) fn current_click_count(&self) -> u8 {
self.click.last.as_ref().map(|c| c.count).unwrap_or(1)
}
}