layout: avoid panic due to subtract with overflow

borisfaure · borisfaure · commit 8cee9a0f9ade · 2025-01-06T12:10:14.000+01:00
This can occur when 2 Press/Release attached to an HoldTap action are
handled between 2 ticks.

```
ERROR panicked at /home/boris/stuff/kb/keyberon/src/layout.rs:319:32:
attempt to subtract with overflow
```
diff --git a/src/layout.rs b/src/layout.rs
@@ -295,7 +295,7 @@ impl<T, K> WaitingState<T, K> {
             .iter()
             .find(|s| self.is_corresponding_release(&s.event))
         {
-            if self.timeout >= self.delay - since {
+            if self.timeout + since >= self.delay {
                 Some(WaitingAction::Tap)
             } else {
                 Some(WaitingAction::Hold)

Original file line number	Diff line number	Diff line change
`@@ -295,7 +295,7 @@ impl<T, K> WaitingState<T, K> {`
`295`	`295`	`.iter()`
`296`	`296`	`.find(\|s\| self.is_corresponding_release(&s.event))`
`297`	`297`	`{`
`298`		`- if self.timeout >= self.delay - since {`
	`298`	`+ if self.timeout + since >= self.delay {`
`299`	`299`	`Some(WaitingAction::Tap)`
`300`	`300`	`} else {`
`301`	`301`	`Some(WaitingAction::Hold)`