types.go RawHistoryFolder

1package ports
2
3// WindowID identifies a window.
4type WindowID uint64
5
6// Rect is a pixel rectangle.
7type Rect struct{ X, Y, W, H int }
8
9// Sides is a set of window sides.
10type Sides uint8
11
12const (
13	SideLeft Sides = 1 << iota
14	SideRight
15	SideTop
16	SideBottom
17	SideAll = SideLeft | SideRight | SideTop | SideBottom
18)
19
20// Overlaps reports whether r and o share a positive area: touching edges
21// do not overlap.
22func (r Rect) Overlaps(o Rect) bool {
23	return r.W > 0 && r.H > 0 && o.W > 0 && o.H > 0 &&
24		r.X < o.X+o.W && o.X < r.X+r.W && r.Y < o.Y+o.H && o.Y < r.Y+r.H
25}
26
27// Contains reports whether o lies wholly inside r.
28func (r Rect) Contains(o Rect) bool {
29	return o.X >= r.X && o.Y >= r.Y && o.X+o.W <= r.X+r.W && o.Y+o.H <= r.Y+r.H
30}
31
32// Insets are distances from the four edges of an area.
33type Insets struct{ Top, Right, Bottom, Left int }
34
35// Inset shrinks r by b on each side in s.
36func (r Rect) Inset(s Sides, b int) Rect {
37	b = min(max(b, 0), r.W/2, r.H/2)
38	if s&SideLeft != 0 {
39		r.X, r.W = r.X+b, r.W-b
40	}
41	if s&SideRight != 0 {
42		r.W -= b
43	}
44	if s&SideTop != 0 {
45		r.Y, r.H = r.Y+b, r.H-b
46	}
47	if s&SideBottom != 0 {
48		r.H -= b
49	}
50	return r
51}