Use intervals for drawing.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/Geometry.h b/src/Geometry.h
index 354f3ea25..4e4fe95d9 100644
--- a/src/Geometry.h
+++ b/src/Geometry.h
@@ -66,6 +66,9 @@ public:
 	constexpr bool Intersects(Interval other) const noexcept {
 		return (right > other.left) && (left < other.right);
 	}
+	constexpr Interval Offset(XYPOSITION offset) const noexcept {
+		return {left + offset, right + offset};
+	}
 };
 
 /**
@@ -112,6 +115,10 @@ public:
 		return (right > other.left) && (left < other.right) &&
 			(bottom > other.top) && (top < other.bottom);
 	}
+	constexpr bool Intersects(Interval horizontalBounds) const noexcept {
+		return (right > horizontalBounds.left) && (left < horizontalBounds.right);
+	}
+
 	void Move(XYPOSITION xDelta, XYPOSITION yDelta) noexcept {
 		left += xDelta;
 		top += yDelta;
@@ -119,6 +126,10 @@ public:
 		bottom += yDelta;
 	}
 
+	PRectangle WithHorizontalBounds(Interval horizontal) const noexcept {
+		return PRectangle(horizontal.left, top, horizontal.right, bottom);
+	}
+
 	constexpr PRectangle Inset(XYPOSITION delta) const noexcept {
 		return PRectangle(left + delta, top + delta, right - delta, bottom - delta);
 	}