feat: real cursor in textinput (#727)

textinput/styles.go

@@ -0,0 +1,96 @@
+package textinput
+
+import (
+	"image/color"
+	"time"
+
+	tea "github.com/charmbracelet/bubbletea/v2"
+	"github.com/charmbracelet/lipgloss/v2"
+)
+
+// DefaultStyles returns the default styles for focused and blurred states for
+// the textarea.
+func DefaultStyles(isDark bool) Styles {
+	lightDark := lipgloss.LightDark(isDark)
+
+	var s Styles
+	s.Focused = StyleState{
+		Placeholder: lipgloss.NewStyle().Foreground(lipgloss.Color("240")),
+		Suggestion:  lipgloss.NewStyle().Foreground(lipgloss.Color("240")),
+		Prompt:      lipgloss.NewStyle().Foreground(lipgloss.Color("7")),
+		Text:        lipgloss.NewStyle(),
+	}
+	s.Blurred = StyleState{
+		Placeholder: lipgloss.NewStyle().Foreground(lipgloss.Color("240")),
+		Suggestion:  lipgloss.NewStyle().Foreground(lipgloss.Color("240")),
+		Prompt:      lipgloss.NewStyle().Foreground(lipgloss.Color("7")),
+		Text:        lipgloss.NewStyle().Foreground(lightDark(lipgloss.Color("245"), lipgloss.Color("7"))),
+	}
+	s.Cursor = CursorStyle{
+		Color: lipgloss.Color("7"),
+		Shape: tea.CursorBlock,
+		Blink: true,
+	}
+	return s
+}
+
+// DefaultLightStyles returns the default styles for a light background.
+func DefaultLightStyles() Styles {
+	return DefaultStyles(false)
+}
+
+// DefaultDarkStyles returns the default styles for a dark background.
+func DefaultDarkStyles() Styles {
+	return DefaultStyles(true)
+}
+
+// Styles are the styles for the textarea, separated into focused and blurred
+// states. The appropriate styles will be chosen based on the focus state of
+// the textarea.
+type Styles struct {
+	Focused StyleState
+	Blurred StyleState
+	Cursor  CursorStyle
+}
+
+// StyleState that will be applied to the text area.
+//
+// StyleState can be applied to focused and unfocused states to change the styles
+// depending on the focus state.
+//
+// For an introduction to styling with Lip Gloss see:
+// https://github.com/charmbracelet/lipgloss
+type StyleState struct {
+	Text        lipgloss.Style
+	Placeholder lipgloss.Style
+	Suggestion  lipgloss.Style
+	Prompt      lipgloss.Style
+}
+
+// CursorStyle is the style for real and virtual cursors.
+type CursorStyle struct {
+	// Style styles the cursor block.
+	//
+	// For real cursors, the foreground color set here will be used as the
+	// cursor color.
+	Color color.Color
+
+	// Shape is the cursor shape. The following shapes are available:
+	//
+	// - tea.CursorBlock
+	// - tea.CursorUnderline
+	// - tea.CursorBar
+	//
+	// This is only used for real cursors.
+	Shape tea.CursorShape
+
+	// CursorBlink determines whether or not the cursor should blink.
+	Blink bool
+
+	// BlinkSpeed is the speed at which the virtual cursor blinks. This has no
+	// effect on real cursors as well as no effect if the cursor is set not to
+	// [CursorBlink].
+	//
+	// By default, the blink speed is set to about 500ms.
+	BlinkSpeed time.Duration
+}