layout_policy.go RawHistoryFolder

1package core
2
3// layoutAxis is a logical navigation axis, independent of rendering.
4type layoutAxis uint8
5
6const (
7	verticalAxis layoutAxis = iota
8	horizontalAxis
9)
10
11func (a layoutAxis) span(r Rect) int {
12	if a == verticalAxis {
13		return r.H
14	}
15	return r.W
16}
17func (a layoutAxis) offset(r *Rect, pixels int) {
18	if a == verticalAxis {
19		r.Y += pixels
20	} else {
21		r.X += pixels
22	}
23}
24
25// layoutPolicy keeps geometry capabilities distinct from workspace navigation.
26// Window state remains owned by Workspace; policies contain no mutable state.
27type layoutPolicy struct {
28	content, workspace            layoutAxis
29	equalCells, appendLast, wraps bool
30}
31
32func (w *Workspace) policy() layoutPolicy {
33	if w.Overflow == OverflowCascade {
34		return layoutPolicy{content: verticalAxis, workspace: horizontalAxis, equalCells: true, appendLast: true, wraps: true}
35	}
36	if w.Overflow == OverflowFixed {
37		return layoutPolicy{content: horizontalAxis, workspace: verticalAxis, equalCells: true, appendLast: true}
38	}
39	return layoutPolicy{content: horizontalAxis, workspace: verticalAxis}
40}