1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
package ui
import (
"github.com/gdamore/tcell"
"github.com/mattn/go-runewidth"
)
type Tabs struct {
Tabs []*Tab
TabStrip *TabStrip
TabContent *TabContent
Selected int
onInvalidateStrip func(d Drawable)
onInvalidateContent func(d Drawable)
}
type Tab struct {
Content Drawable
Name string
invalid bool
}
type TabStrip Tabs
type TabContent Tabs
func NewTabs() *Tabs {
tabs := &Tabs{}
tabs.TabStrip = (*TabStrip)(tabs)
tabs.TabContent = (*TabContent)(tabs)
return tabs
}
func (tabs *Tabs) Add(content Drawable, name string) *Tab {
tab := &Tab{
Content: content,
Name: name,
}
tabs.Tabs = append(tabs.Tabs, tab)
tabs.TabStrip.Invalidate()
content.OnInvalidate(tabs.invalidateChild)
return tab
}
func (tabs *Tabs) invalidateChild(d Drawable) {
if tabs.Selected >= len(tabs.Tabs) {
return
}
if tabs.Tabs[tabs.Selected].Content == d {
if tabs.onInvalidateContent != nil {
tabs.onInvalidateContent(tabs.TabContent)
}
}
}
func (tabs *Tabs) Remove(content Drawable) {
for i, tab := range tabs.Tabs {
if tab.Content == content {
tabs.Tabs = append(tabs.Tabs[:i], tabs.Tabs[i+1:]...)
break
}
}
/* Force the selected index into the existing range */
if tabs.Selected >= len(tabs.Tabs) {
tabs.Select(tabs.Selected - 1)
}
tabs.TabStrip.Invalidate()
}
func (tabs *Tabs) Select(index int) {
if index >= len(tabs.Tabs) {
panic("Tried to set tab index to a non-existing element")
}
if tabs.Selected != index {
tabs.Selected = index
tabs.TabStrip.Invalidate()
tabs.TabContent.Invalidate()
}
}
// TODO: Color repository
func (strip *TabStrip) Draw(ctx *Context) {
x := 0
for i, tab := range strip.Tabs {
style := tcell.StyleDefault.Reverse(true)
if strip.Selected == i {
style = tcell.StyleDefault
}
trunc := runewidth.Truncate(tab.Name, 32, "…")
x += ctx.Printf(x, 0, style, " %s ", trunc)
}
style := tcell.StyleDefault.Reverse(true)
ctx.Fill(x, 0, ctx.Width()-x, 1, ' ', style)
}
func (strip *TabStrip) Invalidate() {
if strip.onInvalidateStrip != nil {
strip.onInvalidateStrip(strip)
}
}
func (strip *TabStrip) OnInvalidate(onInvalidate func(d Drawable)) {
strip.onInvalidateStrip = onInvalidate
}
func (content *TabContent) Children() []Drawable {
children := make([]Drawable, len(content.Tabs))
for i, tab := range content.Tabs {
children[i] = tab.Content
}
return children
}
func (content *TabContent) Draw(ctx *Context) {
if content.Selected >= len(content.Tabs) {
width := ctx.Width()
height := ctx.Height()
ctx.Fill(0, 0, width, height, ' ', tcell.StyleDefault)
}
tab := content.Tabs[content.Selected]
tab.Content.Draw(ctx)
}
func (content *TabContent) Invalidate() {
if content.onInvalidateContent != nil {
content.onInvalidateContent(content)
}
tab := content.Tabs[content.Selected]
tab.Content.Invalidate()
}
func (content *TabContent) OnInvalidate(onInvalidate func(d Drawable)) {
content.onInvalidateContent = onInvalidate
}
|