feat(key): add Equal method to compare key bindings

key/key.go

@@ -36,7 +36,10 @@
 // to render help text for keystrokes in your views.
 package key
 
-import "fmt"
+import (
+	"fmt"
+	"slices"
+)
 
 // Binding describes a set of keybindings and, optionally, their associated
 // help text.
@@ -80,6 +83,15 @@ func WithDisabled() BindingOpt {
 	}
 }
 
+func (b Binding) Equal(o Binding) bool {
+	keysEqual := slices.Equal(slices.Sorted(slices.Values(b.keys)), slices.Sorted(slices.Values(o.keys)))
+	helpsEqual := b.help == o.help
+	if keysEqual && helpsEqual {
+		return true
+	}
+	return false
+}
+
 // SetKeys sets the keys for the keybinding.
 func (b *Binding) SetKeys(keys ...string) {
 	b.keys = keys

textarea/textarea.go

@@ -1391,6 +1391,7 @@ func (m Model) placeholderView() string {
 			gap := strings.Repeat(" ", max(0, m.width-uniseg.StringWidth(plines[0])))
 			renderedPlaceholder := styles.computedPlaceholder().Render(placeholderTail + gap)
 			s.WriteString(lineStyle.Render(renderedPlaceholder))
+
 		// remaining lines
 		case len(plines) > i:
 			// current line placeholder text

textarea/textarea_test.go

@@ -1671,6 +1671,26 @@ func TestView(t *testing.T) {
 				`),
 			},
 		},
+		{
+			name: "placeholder chinese character",
+			modelFunc: func(m Model) Model {
+				m.Placeholder = "输入消息..."
+				m.ShowLineNumbers = true
+				m.SetWidth(20)
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					>   1 输入消息...
+					>
+					>
+					>
+					>
+					>
+
+				`),
+			},
+		},
 	}
 
 	for _, tt := range tests {
@@ -1689,6 +1709,7 @@ func TestView(t *testing.T) {
 			wantView := stripString(tt.want.view)
 
 			if view != wantView {
+				t.Log(udiff.Unified("expected", "got", wantView, view))
 				t.Fatalf("Want:\n%v\nGot:\n%v\n", wantView, view)
 			}