commit 0af566c

ui: Fix scroll when lines are added

When lines were added while "scrollAmt > 0", instead of incrementing
scrollAmt, add the height of the line.

 1@@ -281,15 +281,17 @@ type bufferList struct {
 2 	list    []buffer
 3 	current int
 4 
 5-	width  int
 6-	height int
 7+	width        int
 8+	height       int
 9+	nickColWidth int
10 }
11 
12-func newBufferList(width, height int) bufferList {
13+func newBufferList(width, height, nickColWidth int) bufferList {
14 	return bufferList{
15-		list:   []buffer{},
16-		width:  width,
17-		height: height,
18+		list:         []buffer{},
19+		width:        width,
20+		height:       height,
21+		nickColWidth: nickColWidth,
22 	}
23 }
24 
25@@ -356,7 +358,7 @@ func (bs *bufferList) AddLine(title string, line Line) {
26 	} else {
27 		b.lines = append(b.lines, line)
28 		if idx == bs.current && 0 < b.scrollAmt {
29-			b.scrollAmt++
30+			b.scrollAmt += len(line.NewLines(bs.width-8-bs.nickColWidth)) + 1
31 		}
32 	}
33 
34@@ -470,8 +472,8 @@ func (bs *bufferList) idx(title string) int {
35 	return -1
36 }
37 
38-func (bs *bufferList) Draw(screen tcell.Screen, nickColWidth int) {
39-	bs.list[bs.current].DrawLines(screen, bs.width, bs.height-3, nickColWidth)
40+func (bs *bufferList) Draw(screen tcell.Screen) {
41+	bs.list[bs.current].DrawLines(screen, bs.width, bs.height-3, bs.nickColWidth)
42 	bs.drawStatusBar(screen, bs.height-3)
43 	bs.drawTitleList(screen, bs.height-1)
44 }

 1@@ -51,7 +51,7 @@ func New(config Config) (ui *UI, err error) {
 2 	ui.exit.Store(false)
 3 
 4 	hmIdx := rand.Intn(len(homeMessages))
 5-	ui.bs = newBufferList(w, h)
 6+	ui.bs = newBufferList(w, h, ui.config.NickColWidth)
 7 	ui.bs.Add(Home)
 8 	ui.bs.AddLine("", NewLineNow("--", homeMessages[hmIdx]))
 9 
10@@ -215,6 +215,6 @@ func (ui *UI) Resize() {
11 func (ui *UI) draw() {
12 	_, h := ui.screen.Size()
13 	ui.e.Draw(ui.screen, h-2)
14-	ui.bs.Draw(ui.screen, ui.config.NickColWidth)
15+	ui.bs.Draw(ui.screen)
16 	ui.screen.Show()
17 }