From 857361eaf24bfcedf807caeb647d42a652d11025 Mon Sep 17 00:00:00 2001
From: Gabe Cook <gabe565@gmail.com>
Date: Tue, 30 Apr 2024 23:47:58 -0500
Subject: [PATCH] feat(player): Add `,`/`.` to step by a frame

---
 internal/player/keymap.go | 14 ++++++++++++++
 internal/player/player.go | 10 ++++++++++
 2 files changed, 24 insertions(+)

diff --git a/internal/player/keymap.go b/internal/player/keymap.go
index ff045e91..a431aa5c 100644
--- a/internal/player/keymap.go
+++ b/internal/player/keymap.go
@@ -60,6 +60,14 @@ func newKeymap() keymap {
 			key.WithKeys("shift+right", "L", "D"),
 			key.WithHelp("shift+right", "jump forward"),
 		),
+		stepPrev: key.NewBinding(
+			key.WithKeys(","),
+			key.WithHelp(", (when paused)", "step backward"),
+		),
+		stepNext: key.NewBinding(
+			key.WithKeys("."),
+			key.WithHelp(". (when paused)", "step forward"),
+		),
 		help: key.NewBinding(
 			key.WithKeys("?"),
 			key.WithHelp("?", "help"),
@@ -80,6 +88,8 @@ type keymap struct {
 	jump       key.Binding
 	jumpPrev   key.Binding
 	jumpNext   key.Binding
+	stepPrev   key.Binding
+	stepNext   key.Binding
 	help       key.Binding
 }
 
@@ -105,6 +115,10 @@ func (k keymap) FullHelp() [][]key.Binding {
 			k.jump,
 			k.jumpPrev,
 			k.jumpNext,
+			k.stepPrev,
+			k.stepNext,
+		},
+		{
 			k.help,
 			k.quit,
 		},
diff --git a/internal/player/player.go b/internal/player/player.go
index c91b4619..d870b401 100644
--- a/internal/player/player.go
+++ b/internal/player/player.go
@@ -148,6 +148,16 @@ func (p *Player) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			if p.isPlaying() {
 				return p, p.play()
 			}
+		case key.Matches(msg, p.keymap.stepPrev):
+			if !p.isPlaying() && p.frame > 0 {
+				p.frame--
+				return p, nil
+			}
+		case key.Matches(msg, p.keymap.stepNext):
+			if !p.isPlaying() && p.frame < len(p.movie.Frames)-1 {
+				p.frame++
+				return p, nil
+			}
 		case key.Matches(msg, p.keymap.jumps...):
 			for i, binding := range p.keymap.jumps {
 				if key.Matches(msg, binding) {