Add an option to begin at the top of the list (fix #126)

fuzzyfinder.go

@@ -92,6 +92,12 @@ func (f *finder) initFinder(items []string, matched []matching.Matched, opt opt)
 	f.state.items = items
 	f.state.matched = matched
 	f.state.allMatched = matched
+
+	if opt.beginAtTop {
+		f.state.cursorY = len(f.state.matched) - 1
+		f.state.y = len(f.state.matched) - 1
+	}
+
 	if !isInTesting() {
 		f.drawTimer = time.AfterFunc(0, func() {
 			f._draw()

option.go

@@ -7,6 +7,7 @@ type opt struct {
 	hotReload    bool
 	promptString string
 	header       string
+	beginAtTop   bool
 }
 
 type mode int
@@ -58,6 +59,25 @@ func WithHotReload() Option {
 	}
 }
 
+type cursorPosition int
+
+const (
+	CursorPositionBottom cursorPosition = iota
+	CursorPositionTop
+)
+
+// WithCursorPosition sets the initial position of the cursor
+func WithCursorPosition(position cursorPosition) Option {
+	return func(o *opt) {
+		switch position {
+		case CursorPositionTop:
+			o.beginAtTop = true
+		case CursorPositionBottom:
+			o.beginAtTop = false
+		}
+	}
+}
+
 // WithPromptString changes the prompt string. The default value is "> ".
 func WithPromptString(s string) Option {
 	return func(o *opt) {