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package buffer
import (
"citrons.xyz/talk/tui"
)
type Buffer struct {
top *List
bottom *List
scroll tui.ScrollState
Closed bool
}
type Message interface {
Id() string
Show(odd bool)
}
type List struct {
msg Message
odd bool
prev *List
next *List
}
func (l List) Prev() *List {
return l.prev
}
func (l List) Next() *List {
return l.next
}
func (l List) Msg() Message {
return l.msg
}
func (b *Buffer) Top() *List {
return b.top
}
func (b *Buffer) Bottom() *List {
return b.bottom
}
func (b *Buffer) Add(msg Message) {
l := &List {msg: msg}
if b.bottom != nil {
b.bottom.next = l
l.prev = b.bottom
l.odd = !b.bottom.odd
}
b.bottom = l
if b.top == nil {
b.top = b.bottom
}
}
func (b *Buffer) AddTop(msg Message) {
l := List {msg: msg}
if b.top != nil {
b.top.prev = &l
l.next = b.top
l.odd = !b.top.odd
}
b.top = &l
if b.bottom == nil {
b.bottom = b.top
}
}
func (b *Buffer) Scroll(amnt int) {
b.scroll.Scroll(amnt)
}
func (b *Buffer) ScrollBottom() {
b.scroll.ToStart()
}
func (b *Buffer) AtBottom() bool {
return b.scroll.AtFirst()
}
func (b *Buffer) AtTop() bool {
return b.scroll.AtLast()
}
func (b *Buffer) Show(id string) (atTop bool) {
tui.Push(id, tui.Box {
Width: tui.Fill, Height: tui.Fill, Dir: tui.Up, Overflow: true,
Scroll: &b.scroll,
})
defer tui.Pop()
for m := b.bottom; m != nil; m = m.prev {
var bg int32 = 232
if m.odd {
bg = 233
}
tui.Push(m.msg.Id(), tui.Box {
Width: tui.Fill, Height: tui.Children,
Style: &tui.Style {Fg: tui.White, Bg: bg},
})
m.msg.Show(m.odd)
tui.Pop()
}
return b.scroll.AtLast()
}
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