zoom.go RawHistoryFolder

1package entity
2
3import "time"
4
5// ZoomLevel represents the zoom factor for a specific domain.
6// Allows users to set persistent zoom levels per-site.
7type ZoomLevel struct {
8	Domain     string  // Domain name (e.g., "github.com")
9	ZoomFactor float64 // Zoom factor (1.0 = 100%, 1.5 = 150%)
10	UpdatedAt  time.Time
11}
12
13// Default zoom constants
14const (
15	ZoomDefault = 1.0
16	ZoomMin     = 0.25 // 25%
17	ZoomMax     = 5.0  // 500%
18	ZoomStep    = 0.1  // 10% increments
19)
20
21// NewZoomLevel creates a new zoom level for a domain.
22func NewZoomLevel(domain string, factor float64) *ZoomLevel {
23	return &ZoomLevel{
24		Domain:     domain,
25		ZoomFactor: clampZoom(factor),
26		UpdatedAt:  time.Now(),
27	}
28}
29
30// SetFactor updates the zoom factor, clamping to valid range.
31func (z *ZoomLevel) SetFactor(factor float64) {
32	z.ZoomFactor = clampZoom(factor)
33	z.UpdatedAt = time.Now()
34}
35
36// ZoomIn increases the zoom factor by one step.
37func (z *ZoomLevel) ZoomIn() {
38	z.SetFactor(z.ZoomFactor + ZoomStep)
39}
40
41// ZoomOut decreases the zoom factor by one step.
42func (z *ZoomLevel) ZoomOut() {
43	z.SetFactor(z.ZoomFactor - ZoomStep)
44}
45
46// Reset restores the zoom factor to default.
47func (z *ZoomLevel) Reset() {
48	z.SetFactor(ZoomDefault)
49}
50
51// IsDefault returns true if the zoom is at default level.
52func (z *ZoomLevel) IsDefault() bool {
53	return z.ZoomFactor == ZoomDefault
54}
55
56// Percentage returns the zoom factor as a percentage (e.g., 150 for 1.5).
57func (z *ZoomLevel) Percentage() int {
58	return int(z.ZoomFactor * 100)
59}
60
61// clampZoom constrains a zoom factor to the valid range.
62func clampZoom(factor float64) float64 {
63	if factor < ZoomMin {
64		return ZoomMin
65	}
66	if factor > ZoomMax {
67		return ZoomMax
68	}
69	return factor
70}