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fix(rect): prevent overflow in inner() and area() (#523)

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BlakStar 2023-09-21 07:56:32 +09:00 committed by GitHub
parent c9b8e7cf41
commit 21303f2167
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1 changed files with 9 additions and 6 deletions
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15
src/layout.rs
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@ -206,7 +206,7 @@ impl Rect {
} }
pub const fn area(self) -> u16 { pub const fn area(self) -> u16 {
self.width * self.height self.width.saturating_mul(self.height)
} }
pub const fn left(self) -> u16 { pub const fn left(self) -> u16 {
@ -226,14 +226,17 @@ impl Rect {
} }
pub fn inner(self, margin: &Margin) -> Rect { pub fn inner(self, margin: &Margin) -> Rect {
if self.width < 2 * margin.horizontal || self.height < 2 * margin.vertical { let doubled_margin_horizontal = margin.horizontal.saturating_mul(2);
let doubled_margin_vertical = margin.vertical.saturating_mul(2);
if self.width < doubled_margin_horizontal || self.height < doubled_margin_vertical {
Rect::default() Rect::default()
} else { } else {
Rect { Rect {
x: self.x + margin.horizontal, x: self.x.saturating_add(margin.horizontal),
y: self.y + margin.vertical, y: self.y.saturating_add(margin.vertical),
width: self.width - 2 * margin.horizontal, width: self.width.saturating_sub(doubled_margin_horizontal),
height: self.height - 2 * margin.vertical, height: self.height.saturating_sub(doubled_margin_vertical),
} }
} }
} }