simple client

1 files changed, 94 insertions, 0 deletions

diff --git a/client/buffer/buffer.go b/client/buffer/buffer.go
new file mode 100644
index 0000000..bb782fb
--- /dev/null
+++ b/client/buffer/buffer.go
@@ -0,0 +1,94 @@
+package buffer
+
+import (
+	"citrons.xyz/talk/tui"
+)
+
+type Buffer struct {
+	id string
+	top *bufList
+	bottom *bufList
+	scroll tui.ScrollState
+	Closed bool
+}
+
+type Message interface {
+	Id() string
+	Show(odd bool)
+}
+
+type bufList struct {
+	msg Message
+	odd bool
+	prev *bufList
+	next *bufList
+}
+
+func New(id string) Buffer {
+	return Buffer {id: id}
+}
+
+func (b *Buffer) Add(msg Message) {
+	l := &bufList {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 := bufList {msg: msg} 
+	if b.top != nil {
+		b.top.prev = &l
+		l.next = b.top
+		l.odd = !b.bottom.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() (atTop bool) {
+	tui.Push(b.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 = tui.Black
+		if m.odd {
+			bg = 236
+		}
+		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 atTop
+}