Handle up/down arrow keys to change current result

Author: kovidgoyal

kittens/choose_files/main.go

@@ -32,7 +32,9 @@ type State struct {
 	exclude_patterns []*regexp.Regexp
 	score_patterns   []ScorePattern
 	search_text      string
-	current_idx      int
+
+	current_idx                   int
+	num_of_matches_at_last_render int
 }
 
 func (s State) BaseDir() string    { return utils.IfElse(s.base_dir == "", default_cwd, s.base_dir) }
@@ -119,7 +121,7 @@ func (h *Handler) OnInitialize() (ans string, err error) {
 
 func (h *Handler) OnKeyEvent(ev *loop.KeyEvent) (err error) {
 	switch {
-	case h.handle_edit_keys(ev):
+	case h.handle_edit_keys(ev), h.handle_result_list_keys(ev):
 		h.draw_screen()
 	case ev.MatchesPressOrRepeat("esc") || ev.MatchesPressOrRepeat("ctrl+c"):
 		h.lp.Quit(1)

kittens/choose_files/results.go

@@ -8,6 +8,7 @@ import (
 	"unicode/utf8"
 
 	"github.com/kovidgoyal/kitty/tools/icons"
+	"github.com/kovidgoyal/kitty/tools/tui/loop"
 	"github.com/kovidgoyal/kitty/tools/utils"
 	"github.com/kovidgoyal/kitty/tools/utils/style"
 	"github.com/kovidgoyal/kitty/tools/wcswidth"
@@ -215,5 +216,28 @@ func (h *Handler) draw_results(y, bottom_margin int, matches []*ResultItem, in_p
 	default:
 		h.draw_list_of_results(matches, y, height-2)
 	}
+	h.state.num_of_matches_at_last_render = len(matches)
 	return
 }
+
+func (h *Handler) next_result(amt int) {
+	if h.state.num_of_matches_at_last_render > 0 {
+		idx := h.state.CurrentIndex()
+		idx += amt + h.state.num_of_matches_at_last_render
+		idx %= h.state.num_of_matches_at_last_render
+		h.state.SetCurrentIndex(idx)
+	}
+}
+
+func (h *Handler) handle_result_list_keys(ev *loop.KeyEvent) bool {
+	switch {
+	case ev.MatchesPressOrRepeat("down"):
+		h.next_result(1)
+		return true
+	case ev.MatchesPressOrRepeat("up"):
+		h.next_result(-1)
+		return true
+	default:
+		return false
+	}
+}