commit f5a1c3d

Fix rare panic on Control+E on small windows

Fixes: https://todo.sr.ht/~delthas/senpai/144

 1@@ -295,7 +295,7 @@ func (e *Editor) Set(text string) {
 2 	e.bumpOldestChange()
 3 	e.cursorIdx = len(e.text[e.lineIdx].clusters) - 1
 4 	e.offsetIdx = 0
 5-	for e.width < e.textWidth[e.cursorIdx]-e.textWidth[e.offsetIdx]+16 {
 6+	for e.offsetIdx < len(e.textWidth)-1 && e.width < e.textWidth[e.cursorIdx]-e.textWidth[e.offsetIdx]+16 {
 7 		e.offsetIdx++
 8 	}
 9 	e.autoCache = nil
10@@ -389,7 +389,7 @@ func (e *Editor) End() {
11 		return
12 	}
13 	e.cursorIdx = len(e.text[e.lineIdx].clusters) - 1
14-	for e.width < e.textWidth[e.cursorIdx]-e.textWidth[e.offsetIdx]+16 {
15+	for e.offsetIdx < len(e.textWidth)-1 && e.width < e.textWidth[e.cursorIdx]-e.textWidth[e.offsetIdx]+16 {
16 		e.offsetIdx++
17 	}
18 	e.autoCache = nil
19@@ -449,7 +449,7 @@ func (e *Editor) AutoComplete() (ok bool) {
20 	if len(e.textWidth) <= e.offsetIdx {
21 		e.offsetIdx = 0
22 	}
23-	for e.width < e.textWidth[e.cursorIdx]-e.textWidth[e.offsetIdx]+16 {
24+	for e.offsetIdx < len(e.textWidth)-1 && e.width < e.textWidth[e.cursorIdx]-e.textWidth[e.offsetIdx]+16 {
25 		e.offsetIdx++
26 	}
27 	e.autoCache = nil
28@@ -477,7 +477,7 @@ func (e *Editor) backsearchUpdate(start int) {
29 			e.recompute()
30 			e.setCursor(runeOffset(string(e.text[i].runes), match) + len(e.backsearchPattern))
31 			e.offsetIdx = 0
32-			for e.width < e.textWidth[e.cursorIdx]-e.textWidth[e.offsetIdx]+16 {
33+			for e.offsetIdx < len(e.textWidth)-1 && e.width < e.textWidth[e.cursorIdx]-e.textWidth[e.offsetIdx]+16 {
34 				e.offsetIdx++
35 			}
36 			e.autoCache = nil