Add vertical layout

README.md

@@ -1,10 +1,6 @@
 Bubbles
 =======
 
-<p>
-  <img src="https://stuff.charm.sh/bubbles/bubbles-github.png" width="233" alt="The Bubbles Logo">
-</p>
-
 [![Latest Release](https://img.shields.io/github/release/charmbracelet/bubbles.svg)](https://github.com/charmbracelet/bubbles/releases)
 [![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](https://pkg.go.dev/github.com/charmbracelet/bubbles)
 [![Build Status](https://github.com/charmbracelet/bubbles/workflows/build/badge.svg)](https://github.com/charmbracelet/bubbles/actions)
@@ -40,17 +36,6 @@ the common, and many customization options.
 * [Example code, many fields](https://github.com/charmbracelet/tea/tree/master/examples/textinputs/main.go)
 
 
-## Progress
-
-<img src="https://stuff.charm.sh/bubbles-examples/progress.gif" width="800" alt="Progressbar Example">
-
-A simple, customizable progress meter. Supports solid and gradient fills. The
-empty and filled runes can be set to whatever you'd like. The percentage readout
-is customizable and can also be omitted entirely.
-
-* [Example code](https://github.com/charmbracelet/bubbletea/blob/master/examples/progress/main.go)
-
-
 ## Paginator
 
 <img src="https://stuff.charm.sh/bubbles-examples/pagination.gif" width="200" alt="Paginator Example">
@@ -70,7 +55,7 @@ browse SSH keys.
 
 A viewport for vertically scrolling content. Optionally includes standard
 pager keybindings and mouse wheel support. A high performance mode is available
-for applications which make use of the alternate screen buffer.
+for applications which make use of the alterate screen buffer.
 
 * [Example code](https://github.com/charmbracelet/tea/tree/master/examples/pager/main.go)
 
@@ -89,6 +74,7 @@ indenting and text wrapping.
 
 Part of [Charm](https://charm.sh).
 
-<a href="https://charm.sh/"><img alt="The Charm logo" src="https://stuff.charm.sh/charm-badge-unrounded.jpg" width="400"></a>
+<a href="https://charm.sh/"><img alt="the Charm logo" src="https://stuff.charm.sh/charm-badge.jpg" width="400"></a>
 
 Charm热爱开源! / Charm loves open source!
+

go.mod

@@ -4,10 +4,8 @@ go 1.13
 
 require (
 	github.com/atotto/clipboard v0.1.2
-	github.com/charmbracelet/bubbletea v0.12.2
-	github.com/lucasb-eyer/go-colorful v1.0.3
+	github.com/charmbracelet/bubbletea v0.12.1
 	github.com/mattn/go-runewidth v0.0.9
-	github.com/muesli/reflow v0.2.0
 	github.com/muesli/termenv v0.7.4
 	golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897 // indirect
 	golang.org/x/sys v0.0.0-20201020230747-6e5568b54d1a // indirect

go.sum

@@ -1,7 +1,7 @@
 github.com/atotto/clipboard v0.1.2 h1:YZCtFu5Ie8qX2VmVTBnrqLSiU9XOWwqNRmdT3gIQzbY=
 github.com/atotto/clipboard v0.1.2/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
-github.com/charmbracelet/bubbletea v0.12.2 h1:y9Yo2Pv8tcm3mAJsWONGsmHhzrbNxJVxpVtemikxE9A=
-github.com/charmbracelet/bubbletea v0.12.2/go.mod h1:3gZkYELUOiEUOp0bTInkxguucy/xRbGSOcbMs1geLxg=
+github.com/charmbracelet/bubbletea v0.12.1 h1:t21pkG2IDBRduPbt2J64Dx5yt8yIidAkXwhhrc11SzY=
+github.com/charmbracelet/bubbletea v0.12.1/go.mod h1:3gZkYELUOiEUOp0bTInkxguucy/xRbGSOcbMs1geLxg=
 github.com/containerd/console v1.0.1 h1:u7SFAJyRqWcG6ogaMAx3KjSTy1e3hT9QxqX7Jco7dRc=
 github.com/containerd/console v1.0.1/go.mod h1:XUsP6YE/mKtz6bxc+I8UiKKTP04qjQL4qcS3XoQ5xkw=
 github.com/google/goterm v0.0.0-20190703233501-fc88cf888a3f h1:5CjVwnuUcp5adK4gmY6i72gpVFVnZDP2h5TmPScB6u4=
@@ -12,8 +12,6 @@ github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHX
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
 github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/muesli/reflow v0.2.0 h1:2o0UBJPHHH4fa2GCXU4Rg4DwOtWPMekCeyc5EWbAQp0=
-github.com/muesli/reflow v0.2.0/go.mod h1:qT22vjVmM9MIUeLgsVYe/Ye7eZlbv9dZjL3dVhUqLX8=
 github.com/muesli/termenv v0.7.2 h1:r1raklL3uKE7rOvWgSenmEm2px+dnc33OTisZ8YR1fw=
 github.com/muesli/termenv v0.7.2/go.mod h1:ct2L5N2lmix82RaY3bMWwVu/jUFc9Ule0KGDCiKYPh8=
 github.com/muesli/termenv v0.7.4 h1:/pBqvU5CpkY53tU0vVn+xgs2ZTX63aH5nY+SSps5Xa8=

layouts/vertical.go

@@ -0,0 +1,118 @@
+package layouts
+
+import (
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+// Model is the Bubble Tea model for a vertical layout element.
+type Model struct {
+	Index int
+	Items []tea.Model
+
+	// Focus indicates whether user focus should be on this component
+	focus bool
+}
+
+type FocusItem interface {
+	Focus() tea.Model
+	Blur() tea.Model
+}
+
+// NewModel creates a new model with default settings.
+func NewModel() Model {
+	return Model{}
+}
+
+// Update is the Tea update loop.
+func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
+	if !m.focus {
+		return m, nil
+	}
+
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "shift+tab", "up":
+			m.Index--
+			if m.Index < 0 {
+				m.Index = len(m.Items) - 1
+			}
+			m.updateFocus()
+
+		case "tab", "down":
+			m.Index++
+			if m.Index >= len(m.Items) {
+				m.Index = 0
+			}
+			m.updateFocus()
+		}
+	}
+
+	cmd := m.updateItems(msg)
+	return m, cmd
+}
+
+// View renders the layout in its current state.
+func (m Model) View() string {
+	var view string
+
+	for _, v := range m.Items {
+		if mi, ok := v.(tea.Model); ok {
+			view += mi.View() + "\n"
+		}
+	}
+
+	return view
+}
+
+func (m *Model) updateFocus() {
+	for i, v := range m.Items {
+		if m.Index == i {
+			if fi, ok := v.(FocusItem); ok {
+				// new focused item
+				m.Items[i] = fi.Focus()
+			}
+		} else {
+			if fi, ok := v.(FocusItem); ok {
+				m.Items[i] = fi.Blur()
+			}
+		}
+	}
+}
+
+// Pass messages and models through to text input components. Only text inputs
+// with Focus() set will respond, so it's safe to simply update all of them
+// here without any further logic.
+func (m *Model) updateItems(msg tea.Msg) tea.Cmd {
+	var (
+		cmd  tea.Cmd
+		cmds []tea.Cmd
+	)
+
+	for i, v := range m.Items {
+		if mi, ok := v.(tea.Model); ok {
+			m.Items[i], cmd = mi.Update(msg)
+			if cmd != nil {
+				cmds = append(cmds, cmd)
+			}
+		}
+	}
+
+	return tea.Batch(cmds...)
+}
+
+// Focused returns the focus state on the model.
+func (m Model) Focused() bool {
+	return m.focus
+}
+
+// Focus sets the focus state on the model.
+func (m *Model) Focus() {
+	m.focus = true
+	m.updateFocus()
+}
+
+// Blur removes the focus state on the model.
+func (m *Model) Blur() {
+	m.focus = false
+}

paginator/paginator.go

@@ -19,7 +19,7 @@ const (
 	Dots
 )
 
-// Model is the Bubble Tea model for this user interface.
+// Model is the Tea model for this user interface.
 type Model struct {
 	Type              Type
 	Page              int
@@ -115,7 +115,7 @@ func NewModel() Model {
 }
 
 // Update is the Tea update function which binds keystrokes to pagination.
-func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
+func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 	switch msg := msg.(type) {
 	case tea.KeyMsg:
 		if m.UsePgUpPgDownKeys {
@@ -164,16 +164,16 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 }
 
 // View renders the pagination to a string.
-func (m Model) View() string {
+func View(m Model) string {
 	switch m.Type {
 	case Dots:
-		return m.dotsView()
+		return dotsView(m)
 	default:
-		return m.arabicView()
+		return arabicView(m)
 	}
 }
 
-func (m Model) dotsView() string {
+func dotsView(m Model) string {
 	var s string
 	for i := 0; i < m.TotalPages; i++ {
 		if i == m.Page {
@@ -185,7 +185,7 @@ func (m Model) dotsView() string {
 	return s
 }
 
-func (m Model) arabicView() string {
+func arabicView(m Model) string {
 	return fmt.Sprintf(m.ArabicFormat, m.Page+1, m.TotalPages)
 }
 

progress/progress.go

@@ -1,192 +0,0 @@
-package progress
-
-import (
-	"fmt"
-	"strings"
-
-	"github.com/lucasb-eyer/go-colorful"
-	"github.com/muesli/reflow/ansi"
-	"github.com/muesli/termenv"
-)
-
-const defaultWidth = 40
-
-var color func(string) termenv.Color = termenv.ColorProfile().Color
-
-// Option is used to set options in NewModel. For example:
-//
-//     progress := NewModel(
-//	       WithRamp("#ff0000", "#0000ff"),
-//	       WithoutPercentage(),
-//     )
-type Option func(*Model) error
-
-// WithDefaultGradient sets a gradient fill with default colors.
-func WithDefaultGradient() Option {
-	return WithGradient("#5A56E0", "#EE6FF8")
-}
-
-// WithGradient sets a gradient fill blending between two colors.
-func WithGradient(colorA, colorB string) Option {
-	return func(m *Model) error {
-		return m.setRamp(colorA, colorB, false)
-	}
-}
-
-// WithDefaultScaledGradient sets a gradient with default colors, and scales the
-// gradient to fit the filled portion of the ramp.
-func WithDefaultScaledGradient() Option {
-	return WithScaledGradient("#5A56E0", "#EE6FF8")
-}
-
-// WithScaledGradient scales the gradient to fit the width of the filled portion of
-// the progress bar.
-func WithScaledGradient(colorA, colorB string) Option {
-	return func(m *Model) error {
-		return m.setRamp(colorA, colorB, true)
-	}
-}
-
-// WithSolidFill sets the progress to use a solid fill with the given color.
-func WithSolidFill(color string) Option {
-	return func(m *Model) error {
-		m.FullColor = color
-		m.useRamp = false
-		return nil
-	}
-}
-
-// WithoutPercentage hides the numeric percentage.
-func WithoutPercentage() Option {
-	return func(m *Model) error {
-		m.ShowPercentage = false
-		return nil
-	}
-}
-
-// WithWidth sets the initial width of the progress bar. Note that you can also
-// set the width via the Width property, which can come in handy if you're
-// waiting for a tea.WindowSizeMsg.
-func WithWidth(w int) Option {
-	return func(m *Model) error {
-		m.Width = w
-		return nil
-	}
-}
-
-// Model stores values we'll use when rendering the progress bar.
-type Model struct {
-
-	// Total width of the progress bar, including percentage, if set.
-	Width int
-
-	// "Filled" sections of the progress bar
-	Full      rune
-	FullColor string
-
-	// "Empty" sections of progress bar
-	Empty      rune
-	EmptyColor string
-
-	// Settings for rendering the numeric percentage
-	ShowPercentage  bool
-	PercentFormat   string // a fmt string for a float
-	PercentageStyle *termenv.Style
-
-	useRamp    bool
-	rampColorA colorful.Color
-	rampColorB colorful.Color
-
-	// When true, we scale the gradient to fit the width of the filled section
-	// of the progress bar. When false, the width of the gradient will be set
-	// to the full width of the progress bar.
-	scaleRamp bool
-}
-
-// NewModel returns a model with default values.
-func NewModel(opts ...Option) (*Model, error) {
-	m := &Model{
-		Width:          defaultWidth,
-		Full:           '█',
-		FullColor:      "#7571F9",
-		Empty:          '░',
-		EmptyColor:     "#606060",
-		ShowPercentage: true,
-		PercentFormat:  " %3.0f%%",
-	}
-
-	for _, opt := range opts {
-		if err := opt(m); err != nil {
-			return nil, err
-		}
-	}
-
-	return m, nil
-}
-
-// View renders the progress bar as a given percentage.
-func (m Model) View(percent float64) string {
-	b := strings.Builder{}
-	if m.ShowPercentage {
-		percentage := fmt.Sprintf(m.PercentFormat, percent*100)
-		if m.PercentageStyle != nil {
-			percentage = m.PercentageStyle.Styled(percentage)
-		}
-		m.bar(&b, percent, ansi.PrintableRuneWidth(percentage))
-		b.WriteString(percentage)
-	} else {
-		m.bar(&b, percent, 0)
-	}
-	return b.String()
-}
-
-func (m Model) bar(b *strings.Builder, percent float64, textWidth int) {
-	var (
-		tw = m.Width - textWidth        // total width
-		fw = int(float64(tw) * percent) // filled width
-		p  float64
-	)
-
-	if m.useRamp {
-		// Gradient fill
-		for i := 0; i < fw; i++ {
-			if m.scaleRamp {
-				p = float64(i) / float64(fw)
-			} else {
-				p = float64(i) / float64(tw)
-			}
-			c := m.rampColorA.BlendLuv(m.rampColorB, p).Hex()
-			b.WriteString(termenv.
-				String(string(m.Full)).
-				Foreground(color(c)).
-				String(),
-			)
-		}
-	} else {
-		// Solid fill
-		s := termenv.String(string(m.Full)).Foreground(color(m.FullColor)).String()
-		b.WriteString(strings.Repeat(s, fw))
-	}
-
-	// Empty fill
-	e := termenv.String(string(m.Empty)).Foreground(color(m.EmptyColor)).String()
-	b.WriteString(strings.Repeat(e, tw-fw))
-}
-
-func (m *Model) setRamp(colorA, colorB string, scaled bool) error {
-	a, err := colorful.Hex(colorA)
-	if err != nil {
-		return err
-	}
-
-	b, err := colorful.Hex(colorB)
-	if err != nil {
-		return err
-	}
-
-	m.useRamp = true
-	m.scaleRamp = scaled
-	m.rampColorA = a
-	m.rampColorB = b
-	return nil
-}

spinner/spinner.go

@@ -1,60 +1,23 @@
 package spinner
 
 import (
-	"strings"
 	"time"
 
 	tea "github.com/charmbracelet/bubbletea"
-	"github.com/muesli/reflow/ansi"
 	"github.com/muesli/termenv"
 )
 
-const defaultFPS = time.Second / 10
+const (
+	defaultFPS = time.Second / 10
+)
 
 // Spinner is a set of frames used in animating the spinner.
-type Spinner struct {
-	Frames []string
-	FPS    time.Duration
-}
+type Spinner = []string
 
 var (
 	// Some spinners to choose from. You could also make your own.
-	Line = Spinner{
-		Frames: []string{"|", "/", "-", "\\"},
-		FPS:    time.Second / 10,
-	}
-	Dot = Spinner{
-		Frames: []string{"⣾ ", "⣽ ", "⣻ ", "⢿ ", "⡿ ", "⣟ ", "⣯ ", "⣷ "},
-		FPS:    time.Second / 10,
-	}
-	MiniDot = Spinner{
-		Frames: []string{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"},
-		FPS:    time.Second / 12,
-	}
-	Jump = Spinner{
-		Frames: []string{"⢄", "⢂", "⢁", "⡁", "⡈", "⡐", "⡠"},
-		FPS:    time.Second / 10,
-	}
-	Pulse = Spinner{
-		Frames: []string{"█", "▓", "▒", "░"},
-		FPS:    time.Second / 8,
-	}
-	Points = Spinner{
-		Frames: []string{"∙∙∙", "●∙∙", "∙●∙", "∙∙●"},
-		FPS:    time.Second / 7,
-	}
-	Globe = Spinner{
-		Frames: []string{"🌍", "🌎", "🌏"},
-		FPS:    time.Second / 4,
-	}
-	Moon = Spinner{
-		Frames: []string{"🌑", "🌒", "🌓", "🌔", "🌕", "🌖", "🌗", "🌘"},
-		FPS:    time.Second / 8,
-	}
-	Monkey = Spinner{
-		Frames: []string{"🙈", "🙉", "🙊"},
-		FPS:    time.Second / 3,
-	}
+	Line = Spinner([]string{"|", "/", "-", "\\"})
+	Dot  = Spinner([]string{"⣾ ", "⣽ ", "⣻ ", "⢿ ", "⡿ ", "⣟ ", "⣯ ", "⣷ "})
 
 	color = termenv.ColorProfile().Color
 )
@@ -63,19 +26,22 @@ var (
 // rather than using Model as a struct literal.
 type Model struct {
 
-	// Spinner settings to use. See type Spinner.
-	Spinner Spinner
+	// Type is the set of frames to use. See Spinner.
+	Frames Spinner
 
-	// ForegroundColor sets the background color of the spinner. It can be
-	// a hex code or one of the 256 ANSI colors. If the terminal emulator can't
-	// support the color specified it will automatically degrade (per
-	// github.com/muesli/termenv).
+	// FPS is the speed at which the ticker should tick.
+	FPS time.Duration
+
+	// ForegroundColor sets the background color of the spinner. It can be a
+	// hex code or one of the 256 ANSI colors. If the terminal emulator can't
+	// doesn't support the color specified it will automatically degrade
+	// (per github.com/muesli/termenv).
 	ForegroundColor string
 
-	// BackgroundColor sets the background color of the spinner. It can be
-	// a hex code or one of the 256 ANSI colors. If the terminal emulator can't
-	// support the color specified it will automatically degrade (per
-	// github.com/muesli/termenv).
+	// BackgroundColor sets the background color of the spinner. It can be a
+	// hex code or one of the 256 ANSI colors. If the terminal emulator can't
+	// doesn't support the color specified it will automatically degrade
+	// (per github.com/muesli/termenv).
 	BackgroundColor string
 
 	// MinimumLifetime is the minimum amount of time the spinner can run. Any
@@ -101,49 +67,17 @@ type Model struct {
 
 	frame     int
 	startTime time.Time
-	tag       int
 }
 
 // Start resets resets the spinner start time. For use with MinimumLifetime and
 // MinimumStartTime. Optional.
 //
-// This function is optional and generally considered for advanced use only.
-// Most of the time your application logic will obviate the need for this
-// method.
-//
 // This is considered experimental and may not appear in future versions of
 // this library.
 func (m *Model) Start() {
 	m.startTime = time.Now()
 }
 
-// Finish sets the internal timer to a completed state so long as the spinner
-// isn't flagged to be showing. If it is showing, finish has no effect. The
-// idea here is that you call Finish if your operation has completed and, if
-// the spinner isn't showing yet (by virtue of HideFor) then Visible() doesn't
-// show the spinner at all.
-//
-// This is intended to work in conjunction with MinimumLifetime and
-// MinimumStartTime, is completely optional.
-//
-// This function is optional and generally considered for advanced use only.
-// Most of the time your application logic will obviate the need for this
-// method.
-//
-// This is considered experimental and may not appear in future versions of
-// this library.
-func (m *Model) Finish() {
-	if m.hidden() {
-		m.startTime = time.Time{}
-	}
-}
-
-// advancedMode returns whether or not the user is making use of HideFor and
-// MinimumLifetime properties.
-func (m Model) advancedMode() bool {
-	return m.HideFor > 0 && m.MinimumLifetime > 0
-}
-
 // hidden returns whether or not Model.HideFor is in effect.
 func (m Model) hidden() bool {
 	if m.startTime.IsZero() {
@@ -155,10 +89,12 @@ func (m Model) hidden() bool {
 	return m.startTime.Add(m.HideFor).After(time.Now())
 }
 
-// finished returns whether the minimum lifetime of this spinner has been
-// exceeded.
+// finished returns whether Model.MinimumLifetimeReached has been met.
 func (m Model) finished() bool {
-	if m.startTime.IsZero() || m.MinimumLifetime == 0 {
+	if m.startTime.IsZero() {
+		return true
+	}
+	if m.MinimumLifetime == 0 {
 		return true
 	}
 	return m.startTime.Add(m.HideFor).Add(m.MinimumLifetime).Before(time.Now())
@@ -166,13 +102,13 @@ func (m Model) finished() bool {
 
 // Visible returns whether or not the view should be rendered. Works in
 // conjunction with Model.HideFor and Model.MinimumLifetimeReached. You should
-// use this method directly to determine whether or not to render this view in
+// use this message directly to determine whether or not to render this view in
 // the parent view and whether to continue sending spin messaging in the
 // parent update function.
 //
-// This function is optional and generally considered for advanced use only.
-// Most of the time your application logic will obviate the need for this
-// method.
+// Also note that using this function is optional and generally considered for
+// advanced use only. Most of the time your application logic will determine
+// whether or not this view should be used.
 //
 // This is considered experimental and may not appear in future versions of
 // this library.
@@ -182,78 +118,55 @@ func (m Model) Visible() bool {
 
 // NewModel returns a model with default values.
 func NewModel() Model {
-	return Model{Spinner: Line}
+	return Model{
+		Frames: Line,
+		FPS:    defaultFPS,
+	}
 }
 
 // TickMsg indicates that the timer has ticked and we should render a frame.
 type TickMsg struct {
 	Time time.Time
-	tag  int
 }
 
 // Update is the Tea update function. This will advance the spinner one frame
 // every time it's called, regardless the message passed, so be sure the logic
 // is setup so as not to call this Update needlessly.
-func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
-	switch msg := msg.(type) {
-	case TickMsg:
-
-		// If a tag is set, and it's not the one we expect, reject the message.
-		// This prevents the spinner from receiving too many messages and
-		// this spinning too fast.
-		if msg.tag > 0 && msg.tag != m.tag {
-			return m, nil
-		}
-
+func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
+	if _, ok := msg.(TickMsg); ok {
 		m.frame++
-		if m.frame >= len(m.Spinner.Frames) {
+		if m.frame >= len(m.Frames) {
 			m.frame = 0
 		}
-
-		m.tag++
-		return m, m.tick(m.tag)
-	default:
-		return m, nil
+		return m, Tick(m)
 	}
+	return m, nil
 }
 
 // View renders the model's view.
-func (m Model) View() string {
-	if m.frame >= len(m.Spinner.Frames) {
-		return "(error)"
+func View(model Model) string {
+	if model.frame >= len(model.Frames) {
+		return "error"
 	}
 
-	frame := m.Spinner.Frames[m.frame]
+	frame := model.Frames[model.frame]
 
-	// If we're using the fine-grained hide/show spinner rules and those rules
-	// deem that the spinner should be hidden, draw an empty space in place of
-	// the spinner.
-	if m.advancedMode() && !m.Visible() {
-		frame = strings.Repeat(" ", ansi.PrintableRuneWidth(frame))
-	}
-
-	if m.ForegroundColor != "" || m.BackgroundColor != "" {
+	if model.ForegroundColor != "" || model.BackgroundColor != "" {
 		return termenv.
 			String(frame).
-			Foreground(color(m.ForegroundColor)).
-			Background(color(m.BackgroundColor)).
+			Foreground(color(model.ForegroundColor)).
+			Background(color(model.BackgroundColor)).
 			String()
 	}
 
 	return frame
 }
 
-// Tick is the command used to advance the spinner one frame. Use this command
-// to effectively start the spinner.
-func Tick() tea.Msg {
-	return TickMsg{Time: time.Now()}
-}
-
-func (m Model) tick(tag int) tea.Cmd {
-	return tea.Tick(m.Spinner.FPS, func(t time.Time) tea.Msg {
+// Tick is the command used to advance the spinner one frame.
+func Tick(m Model) tea.Cmd {
+	return tea.Tick(m.FPS, func(t time.Time) tea.Msg {
 		return TickMsg{
 			Time: t,
-			tag:  tag,
 		}
 	})
 }

textinput/textinput.go

@@ -67,6 +67,7 @@ type Model struct {
 	Cursor           string
 	BlinkSpeed       time.Duration
 	TextColor        string
+	FocusedTextColor string
 	BackgroundColor  string
 	PlaceholderColor string
 	CursorColor      string
@@ -114,6 +115,7 @@ func NewModel() Model {
 		Placeholder:      "",
 		BlinkSpeed:       defaultBlinkSpeed,
 		TextColor:        "",
+		FocusedTextColor: "205",
 		PlaceholderColor: "240",
 		CursorColor:      "",
 		EchoCharacter:    '*',
@@ -182,15 +184,19 @@ func (m Model) Focused() bool {
 }
 
 // Focus sets the focus state on the model.
-func (m *Model) Focus() {
+func (m Model) Focus() tea.Model {
 	m.focus = true
 	m.blink = m.cursorMode == cursorHide // show the cursor unless we've explicitly hidden it
+
+	return m
 }
 
 // Blur removes the focus state on the model.
-func (m *Model) Blur() {
+func (m Model) Blur() tea.Model {
 	m.focus = false
 	m.blink = true
+
+	return m
 }
 
 // Reset sets the input to its default state with no input. Returns whether
@@ -450,8 +456,12 @@ func (m Model) echoTransform(v string) string {
 	}
 }
 
+func (m Model) Init() tea.Cmd {
+	return Blink
+}
+
 // Update is the Bubble Tea update loop.
-func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
+func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	if !m.focus {
 		m.blink = true
 		return m, nil
@@ -508,17 +518,17 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 			m.offset = 0
 		case tea.KeyCtrlV: // ^V paste
 			return m, Paste
-		case tea.KeyRunes: // input regular characters
-			if msg.Alt && len(msg.Runes) == 1 {
-				if msg.Runes[0] == 'd' { // alt+d, delete word right of cursor
+		case tea.KeyRune: // input a regular character
+			if msg.Alt {
+				if msg.Rune == 'd' { // alt+d, delete word right of cursor
 					resetBlink = m.deleteWordRight()
 					break
 				}
-				if msg.Runes[0] == 'b' { // alt+b, back one word
+				if msg.Rune == 'b' { // alt+b, back one word
 					resetBlink = m.wordLeft()
 					break
 				}
-				if msg.Runes[0] == 'f' { // alt+f, forward one word
+				if msg.Rune == 'f' { // alt+f, forward one word
 					resetBlink = m.wordRight()
 					break
 				}
@@ -526,8 +536,8 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 
 			// Input a regular character
 			if m.CharLimit <= 0 || len(m.value) < m.CharLimit {
-				m.value = append(m.value[:m.pos], append(msg.Runes, m.value[m.pos:]...)...)
-				resetBlink = m.SetCursor(m.pos + len(msg.Runes))
+				m.value = append(m.value[:m.pos], append([]rune{msg.Rune}, m.value[m.pos:]...)...)
+				resetBlink = m.SetCursor(m.pos + 1)
 			}
 		}
 
@@ -560,9 +570,14 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 
 // View renders the textinput in its current state.
 func (m Model) View() string {
+	prompt := termenv.String(m.Prompt)
+	if m.focus {
+		prompt = prompt.Foreground(color(m.FocusedTextColor))
+	}
+
 	// Placeholder text
 	if len(m.value) == 0 && m.Placeholder != "" {
-		return m.placeholderView()
+		return prompt.String() + m.placeholderView()
 	}
 
 	value := m.value[m.offset:m.offsetRight]
@@ -590,7 +605,7 @@ func (m Model) View() string {
 		)
 	}
 
-	return m.Prompt + v
+	return prompt.String() + v
 }
 
 // placeholderView returns the prompt and placeholder view, if any.
@@ -610,7 +625,7 @@ func (m Model) placeholderView() string {
 	// The rest of the placeholder text
 	v += m.colorPlaceholder(p[1:])
 
-	return m.Prompt + v
+	return v
 }
 
 // cursorView styles the cursor.

viewport/viewport.go

@@ -7,7 +7,9 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 )
 
-const spacebar = " "
+const (
+	spacebar = " "
+)
 
 // MODEL
 
@@ -267,7 +269,7 @@ func ViewDown(m Model, lines []string) tea.Cmd {
 }
 
 // ViewUp is a high performance command the moves the viewport down by a given
-// number of lines height. Use Model.ViewUp to get the lines that should be
+// number of lines height. Use Model.ViewDown to get the lines that should be
 // rendered.
 func ViewUp(m Model, lines []string) tea.Cmd {
 	if len(lines) == 0 {
@@ -281,7 +283,7 @@ func ViewUp(m Model, lines []string) tea.Cmd {
 // Update runs the update loop with default keybindings similar to popular
 // pagers. To define your own keybindings use the methods on Model (i.e.
 // Model.LineDown()) and define your own update function.
-func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
+func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 	var cmd tea.Cmd
 
 	switch msg := msg.(type) {
@@ -352,7 +354,7 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 // VIEW
 
 // View renders the viewport into a string.
-func (m Model) View() string {
+func View(m Model) string {
 	if m.HighPerformanceRendering {
 		// Just send newlines since we're doing to be rendering the actual
 		// content seprately. We still need send something that equals the