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Move components over and update examples

This commit is contained in:
Christian Rocha 2020-05-12 17:05:16 -04:00
parent 4bf40fbe62
commit 82ddbb8e12
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GPG Key ID: D6CC7A16E5878018
15 changed files with 1002 additions and 57 deletions
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4
examples/go.mod
View File

@ -6,8 +6,8 @@ replace github.com/charmbracelet/boba => ../
require (
github.com/charmbracelet/boba v0.0.0-00010101000000-000000000000
github.com/charmbracelet/tea v0.3.0
github.com/charmbracelet/teaparty v0.0.0-20200511213328-a72bf9128d83
github.com/fogleman/ease v0.0.0-20170301025033-8da417bf1776
github.com/muesli/termenv v0.5.2
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37 // indirect
golang.org/x/sys v0.0.0-20200509044756-6aff5f38e54f // indirect
)

19
examples/go.sum
View File

@ -1,11 +1,3 @@
github.com/charmbracelet/tea v0.0.0-20200130023737-bb06373836b4 h1:O8IGyYrKQuCwZZ98JP3DvzQCoPiXM5Y2zjwlDY7mOFM=
github.com/charmbracelet/tea v0.0.0-20200130023737-bb06373836b4/go.mod h1:UsFFdg04MNbcYi1r2FBtdDEFY07bObaYDKHhE1xZUaQ=
github.com/charmbracelet/tea v0.3.0 h1:W5F1x/IYeSCKpZl3/hM3Mn5v2KAagckabDFhhzh5sIE=
github.com/charmbracelet/tea v0.3.0/go.mod h1:uA/DUzCuyIZ1NFyAdCz6k+gF8lspujo6ZvoavcSsLCM=
github.com/charmbracelet/teaparty v0.0.0-20200212224515-b4d35fd52906 h1:kcvv+hjb0dJiqhtMXkql5tczxalWMPvKIqwWo7cyhiQ=
github.com/charmbracelet/teaparty v0.0.0-20200212224515-b4d35fd52906/go.mod h1:BG6oiwNZL9hB739ZOifRi3ePRGv0nT+kRTfxYLcZj/Y=
github.com/charmbracelet/teaparty v0.0.0-20200511213328-a72bf9128d83 h1:ivIS4ze0LLG9yl9L8cnYerh6dWnqhmBqh1ohmrA3I/I=
github.com/charmbracelet/teaparty v0.0.0-20200511213328-a72bf9128d83/go.mod h1:rlnGPwUokLHs2rQBiIYg6fpLM5m4DvtE2LwzdvS1wsk=
github.com/fogleman/ease v0.0.0-20170301025033-8da417bf1776 h1:VRIbnDWRmAh5yBdz+J6yFMF5vso1It6vn+WmM/5l7MA=
github.com/fogleman/ease v0.0.0-20170301025033-8da417bf1776/go.mod h1:9wvnDu3YOfxzWM9Cst40msBF1C2UdQgDv962oTxSuMs=
github.com/google/goterm v0.0.0-20190703233501-fc88cf888a3f h1:5CjVwnuUcp5adK4gmY6i72gpVFVnZDP2h5TmPScB6u4=
@ -14,16 +6,19 @@ github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tW
github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
github.com/muesli/termenv v0.4.0/go.mod h1:O1/I6sw+6KcrgAmcs6uiUVr7Lui+DNVbHTzt9Lm/PlI=
github.com/muesli/termenv v0.5.2 h1:N1Y1dHRtx6OizOgaIQXd8SkJl4T/cCOV+YyWXiuLUEA=
github.com/muesli/termenv v0.5.2/go.mod h1:O1/I6sw+6KcrgAmcs6uiUVr7Lui+DNVbHTzt9Lm/PlI=
github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942 h1:A7GG7zcGjl3jqAqGPmcNjd/D9hzL95SuoOQAaFNdLU0=
github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942/go.mod h1:eCbImbZ95eXtAUIbLAuAVnBnwf83mjf6QIVH8SHYwqQ=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37 h1:cg5LA/zNPRzIXIWSCxQW10Rvpy94aQh3LT/ShoCpkHw=
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200120151820-655fe14d7479/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200124204421-9fbb57f87de9 h1:1/DFK4b7JH8DmkqhUk48onnSfrPzImPoVxuomtbT2nk=
golang.org/x/sys v0.0.0-20200124204421-9fbb57f87de9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200430202703-d923437fa56d h1:xmcims+WSpFuY56YEzkKF6IMDxYAVDRipkQRJfXUBZk=
golang.org/x/sys v0.0.0-20200430202703-d923437fa56d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200509044756-6aff5f38e54f h1:mOhmO9WsBaJCNmaZHPtHs9wOcdqdKCjF6OPJlmDM3KI=
golang.org/x/sys v0.0.0-20200509044756-6aff5f38e54f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

2
examples/http/main.go
View File

@ -74,7 +74,7 @@ func view(model boba.Model) string {
} else if m.status != 0 {
s += fmt.Sprintf("%d %s", m.status, http.StatusText(m.status))
}
return s
return s + "\n"
}
func checkServer() boba.Msg {

26
examples/input/main.go
View File

@ -1,14 +1,12 @@
package main
// A simple program that counts down from 5 and then exits.
import (
"errors"
"fmt"
"log"
"github.com/charmbracelet/boba"
"github.com/charmbracelet/teaparty/input"
input "github.com/charmbracelet/boba/textinput"
)
type Model struct {
@ -33,8 +31,9 @@ func main() {
}
func initialize() (boba.Model, boba.Cmd) {
inputModel := input.DefaultModel()
inputModel := input.NewModel()
inputModel.Placeholder = "Pikachu"
inputModel.Focus()
return Model{
textInput: inputModel,
@ -60,6 +59,8 @@ func update(msg boba.Msg, model boba.Model) (boba.Model, boba.Cmd) {
case boba.KeyCtrlC:
fallthrough
case boba.KeyEsc:
fallthrough
case boba.KeyEnter:
return m, boba.Quit
}
@ -74,13 +75,16 @@ func update(msg boba.Msg, model boba.Model) (boba.Model, boba.Cmd) {
}
func subscriptions(model boba.Model) boba.Subs {
m, ok := model.(Model)
if !ok {
return nil
}
sub, err := input.MakeSub(m.textInput)
if err != nil {
return nil
}
return boba.Subs{
// We just hand off the subscription to the input component, giving
// it the model it expects.
"input": func(model boba.Model) boba.Msg {
m, _ := model.(Model)
return input.Blink(m.textInput)
},
"input": sub,
}
}
@ -95,5 +99,5 @@ func view(model boba.Model) string {
"What’s your favorite Pokémon?\n\n%s\n\n%s",
input.View(m.textInput),
"(esc to quit)",
)
) + "\n"
}

2
examples/pager/main.go
View File

@ -6,7 +6,7 @@ import (
"os"
"github.com/charmbracelet/boba"
"github.com/charmbracelet/teaparty/pager"
"github.com/charmbracelet/boba/pager"
)
func main() {

2
examples/simple/main.go
View File

@ -54,7 +54,7 @@ func update(msg boba.Msg, model boba.Model) (boba.Model, boba.Cmd) {
// to the terminal.
func view(model boba.Model) string {
m, _ := model.(Model)
return fmt.Sprintf("Hi. This program will exit in %d seconds. To quit sooner press any key.", m)
return fmt.Sprintf("Hi. This program will exit in %d seconds. To quit sooner press any key.\n", m)
}
// This is a subscription which we setup in NewProgram(). It waits for one

21
examples/spinner/main.go
View File

@ -2,10 +2,10 @@ package main
import (
"fmt"
"log"
"os"
"github.com/charmbracelet/boba"
"github.com/charmbracelet/teaparty/spinner"
"github.com/charmbracelet/boba/spinner"
"github.com/muesli/termenv"
)
@ -14,8 +14,9 @@ var (
)
type Model struct {
spinner spinner.Model
err error
spinner spinner.Model
quitting bool
err error
}
type errMsg error
@ -23,7 +24,8 @@ type errMsg error
func main() {
p := boba.NewProgram(initialize, update, view, subscriptions)
if err := p.Start(); err != nil {
log.Fatal(err)
fmt.Println(err)
os.Exit(1)
}
}
@ -51,6 +53,7 @@ func update(msg boba.Msg, model boba.Model) (boba.Model, boba.Cmd) {
case "esc":
fallthrough
case "ctrl+c":
m.quitting = true
return m, boba.Quit
default:
return m, nil
@ -70,7 +73,7 @@ func update(msg boba.Msg, model boba.Model) (boba.Model, boba.Cmd) {
func view(model boba.Model) string {
m, ok := model.(Model)
if !ok {
return "could not perform assertion on model in view"
return "could not perform assertion on model in view\n"
}
if m.err != nil {
return m.err.Error()
@ -79,7 +82,11 @@ func view(model boba.Model) string {
String(spinner.View(m.spinner)).
Foreground(color.Color("205")).
String()
return fmt.Sprintf("\n\n %s Loading forever...press q to quit\n\n", s)
str := fmt.Sprintf("\n\n %s Loading forever...press q to quit\n\n", s)
if m.quitting {
return str + "\n"
}
return str
}
func subscriptions(model boba.Model) boba.Subs {

202
examples/textinputs/main.go Normal file
View File

@ -0,0 +1,202 @@
package main
import (
"fmt"
"os"
"github.com/charmbracelet/boba"
input "github.com/charmbracelet/boba/textinput"
te "github.com/muesli/termenv"
)
var (
color = te.ColorProfile().Color
focusedText = "205"
focusedPrompt = te.String("> ").Foreground(color("205")).String()
blurredPrompt = "> "
focusedSubmitButton = "[ " + te.String("Submit").Foreground(color("205")).String() + " ]"
blurredSubmitButton = "[ " + te.String("Submit").Foreground(color("240")).String() + " ]"
)
func main() {
if err := boba.NewProgram(
initialize,
update,
view,
subscriptions,
).Start(); err != nil {
fmt.Printf("could not start program: %s\n", err)
os.Exit(1)
}
}
type Model struct {
index int
nameInput input.Model
nickNameInput input.Model
emailInput input.Model
submitButton string
}
func initialize() (boba.Model, boba.Cmd) {
name := input.NewModel()
name.Placeholder = "Name"
name.Focus()
name.Prompt = focusedPrompt
name.TextColor = focusedText
nickName := input.NewModel()
nickName.Placeholder = "Nickname"
nickName.Prompt = blurredPrompt
email := input.NewModel()
email.Placeholder = "Email"
email.Prompt = blurredPrompt
return Model{0, name, nickName, email, blurredSubmitButton}, nil
}
func update(msg boba.Msg, model boba.Model) (boba.Model, boba.Cmd) {
m, ok := model.(Model)
if !ok {
panic("could not perform assertion on model")
}
switch msg := msg.(type) {
case boba.KeyMsg:
switch msg.String() {
case "ctrl+c":
return m, boba.Quit
// Cycle between inputs
case "tab":
fallthrough
case "shift+tab":
fallthrough
case "enter":
fallthrough
case "up":
fallthrough
case "down":
inputs := []input.Model{
m.nameInput,
m.nickNameInput,
m.emailInput,
}
s := msg.String()
// Did the user press enter while the submit button was focused?
// If so, exit.
if s == "enter" && m.index == len(inputs) {
return m, boba.Quit
}
// Cycle indexes
if s == "up" || s == "shift+tab" {
m.index--
} else {
m.index++
}
if m.index > len(inputs) {
m.index = 0
} else if m.index < 0 {
m.index = len(inputs)
}
for i := 0; i <= len(inputs)-1; i++ {
if i == m.index {
// Focused input
inputs[i].Focus()
inputs[i].Prompt = focusedPrompt
inputs[i].TextColor = focusedText
continue
}
// Blurred input
inputs[i].Blur()
inputs[i].Prompt = blurredPrompt
inputs[i].TextColor = ""
}
m.nameInput = inputs[0]
m.nickNameInput = inputs[1]
m.emailInput = inputs[2]
if m.index == len(inputs) {
m.submitButton = focusedSubmitButton
} else {
m.submitButton = blurredSubmitButton
}
return m, nil
default:
// Handle character input
m = updateInputs(msg, m)
return m, nil
}
default:
// Handle blinks
m = updateInputs(msg, m)
return m, nil
}
}
func updateInputs(msg boba.Msg, m Model) Model {
m.nameInput, _ = input.Update(msg, m.nameInput)
m.nickNameInput, _ = input.Update(msg, m.nickNameInput)
m.emailInput, _ = input.Update(msg, m.emailInput)
return m
}
func subscriptions(model boba.Model) boba.Subs {
m, ok := model.(Model)
if !ok {
return nil
}
// It's a little hacky, but we're using the subscription from one
// input element to handle the blinking for all elements. It doesn't
// have to be this way, we're just feeling a bit lazy at the moment.
inputSub, err := input.MakeSub(m.nameInput)
if err != nil {
return nil
}
return boba.Subs{
// It's a little hacky, but we're using the subscription from one
// input element to handle the blinking for all elements. It doesn't
// have to be this way, we're just feeling a bit lazy at the moment.
"blink": inputSub,
}
}
func view(model boba.Model) string {
m, ok := model.(Model)
if !ok {
return "[error] could not perform assertion on model"
}
s := "\n"
inputs := []string{
input.View(m.nameInput),
input.View(m.nickNameInput),
input.View(m.emailInput),
}
for i := 0; i < len(inputs); i++ {
s += inputs[i]
if i < len(inputs)-1 {
s += "\n"
}
}
s += "\n\n" + m.submitButton + "\n"
return s
}

44
examples/views/main.go
View File

@ -8,12 +8,12 @@ import (
"strings"
"time"
"github.com/charmbracelet/tea"
"github.com/charmbracelet/boba"
"github.com/fogleman/ease"
)
func main() {
p := tea.NewProgram(
p := boba.NewProgram(
initialize,
update,
view,
@ -28,13 +28,13 @@ func main() {
type tickMsg time.Time
func newTickMsg(t time.Time) tea.Msg {
func newTickMsg(t time.Time) boba.Msg {
return tickMsg(t)
}
type frameMsg time.Time
func newFrameMsg(t time.Time) tea.Msg {
func newFrameMsg(t time.Time) boba.Msg {
return frameMsg(t)
}
@ -52,27 +52,27 @@ type Model struct {
// INIT
func initialize() (tea.Model, tea.Cmd) {
func initialize() (boba.Model, boba.Cmd) {
return Model{0, false, 10, 0, 0, false}, nil
}
// SUBSCRIPTIONS
func subscriptions(model tea.Model) tea.Subs {
func subscriptions(model boba.Model) boba.Subs {
m, _ := model.(Model)
if !m.Chosen || m.Loaded {
return tea.Subs{
"tick": tea.Every(time.Second, newTickMsg),
return boba.Subs{
"tick": boba.Every(time.Second, newTickMsg),
}
}
return tea.Subs{
"frame": tea.Every(time.Second/60, newFrameMsg),
return boba.Subs{
"frame": boba.Every(time.Second/60, newFrameMsg),
}
}
// UPDATE
func update(msg tea.Msg, model tea.Model) (tea.Model, tea.Cmd) {
func update(msg boba.Msg, model boba.Model) (boba.Model, boba.Cmd) {
m, _ := model.(Model)
if !m.Chosen {
@ -81,10 +81,10 @@ func update(msg tea.Msg, model tea.Model) (tea.Model, tea.Cmd) {
return updateChosen(msg, m)
}
func updateChoices(msg tea.Msg, m Model) (tea.Model, tea.Cmd) {
func updateChoices(msg boba.Msg, m Model) (boba.Model, boba.Cmd) {
switch msg := msg.(type) {
case tea.KeyMsg:
case boba.KeyMsg:
switch msg.String() {
case "j":
fallthrough
@ -108,12 +108,12 @@ func updateChoices(msg tea.Msg, m Model) (tea.Model, tea.Cmd) {
case "esc":
fallthrough
case "ctrl+c":
return m, tea.Quit
return m, boba.Quit
}
case tickMsg:
if m.Ticks == 0 {
return m, tea.Quit
return m, boba.Quit
}
m.Ticks -= 1
}
@ -121,17 +121,17 @@ func updateChoices(msg tea.Msg, m Model) (tea.Model, tea.Cmd) {
return m, nil
}
func updateChosen(msg tea.Msg, m Model) (tea.Model, tea.Cmd) {
func updateChosen(msg boba.Msg, m Model) (boba.Model, boba.Cmd) {
switch msg := msg.(type) {
case tea.KeyMsg:
case boba.KeyMsg:
switch msg.String() {
case "q":
fallthrough
case "esc":
fallthrough
case "ctrl+c":
return m, tea.Quit
return m, boba.Quit
}
case frameMsg:
@ -148,7 +148,7 @@ func updateChosen(msg tea.Msg, m Model) (tea.Model, tea.Cmd) {
case tickMsg:
if m.Loaded {
if m.Ticks == 0 {
return m, tea.Quit
return m, boba.Quit
}
m.Ticks -= 1
}
@ -159,12 +159,12 @@ func updateChosen(msg tea.Msg, m Model) (tea.Model, tea.Cmd) {
// VIEW
func view(model tea.Model) string {
func view(model boba.Model) string {
m, _ := model.(Model)
if !m.Chosen {
return choicesView(m)
return choicesView(m) + "\n"
}
return chosenView(m)
return chosenView(m) + "\n"
}
const choicesTpl = `What to do today?

1
go.mod
View File

@ -5,5 +5,6 @@ go 1.13
require (
github.com/muesli/termenv v0.5.2
github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37
golang.org/x/sys v0.0.0-20200430202703-d923437fa56d // indirect
)

7
go.sum
View File

@ -8,6 +8,13 @@ github.com/muesli/termenv v0.5.2 h1:N1Y1dHRtx6OizOgaIQXd8SkJl4T/cCOV+YyWXiuLUEA=
github.com/muesli/termenv v0.5.2/go.mod h1:O1/I6sw+6KcrgAmcs6uiUVr7Lui+DNVbHTzt9Lm/PlI=
github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942 h1:A7GG7zcGjl3jqAqGPmcNjd/D9hzL95SuoOQAaFNdLU0=
github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942/go.mod h1:eCbImbZ95eXtAUIbLAuAVnBnwf83mjf6QIVH8SHYwqQ=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37 h1:cg5LA/zNPRzIXIWSCxQW10Rvpy94aQh3LT/ShoCpkHw=
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200430202703-d923437fa56d h1:xmcims+WSpFuY56YEzkKF6IMDxYAVDRipkQRJfXUBZk=
golang.org/x/sys v0.0.0-20200430202703-d923437fa56d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

202
pager/pager.go Normal file
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package pager
import (
"errors"
"os"
"strings"
"github.com/charmbracelet/boba"
"golang.org/x/crypto/ssh/terminal"
)
func NewProgram(initialContent string) *boba.Program {
return boba.NewProgram(
Init(initialContent),
Update,
View,
nil,
)
}
// MSG
type terminalSizeMsg struct {
width int
height int
}
type errMsg error
// MODEL
type State int
const (
StateInit State = iota
StateReady
)
type Model struct {
Err error
Standalone bool
State State
Width int
Height int
Y int
lines []string
}
// Content adds text content to the model
func (m *Model) Content(s string) {
s = strings.TrimSpace(s)
s = strings.Replace(s, "\r\n", "\n", -1) // normalize line endings
m.lines = strings.Split(s, "\n")
}
func NewModel() Model {
return Model{
State: StateInit,
}
}
// INIT
func Init(initialContent string) func() (boba.Model, boba.Cmd) {
m := NewModel()
m.Standalone = true
m.Content(initialContent)
return func() (boba.Model, boba.Cmd) {
return m, getTerminalSize
}
}
// UPDATE
func Update(msg boba.Msg, model boba.Model) (boba.Model, boba.Cmd) {
m, ok := model.(Model)
if !ok {
return Model{
Err: errors.New("could not perform assertion on model in update in pager; are you sure you passed the correct model?"),
}, nil
}
switch msg := msg.(type) {
case boba.KeyMsg:
switch msg.String() {
case "q":
fallthrough
case "ctrl+c":
if m.Standalone {
return m, boba.Quit
}
// Up one page
case "b":
m.Y = max(0, m.Y-m.Height)
return m, nil
// Down one page
case "space":
fallthrough
case "f":
m.Y = min(len(m.lines)-m.Height, m.Y+m.Height)
return m, nil
// Up half page
case "u":
m.Y = max(0, m.Y-m.Height/2)
return m, nil
// Down half page
case "d":
m.Y = min(len(m.lines)-m.Height, m.Y+m.Height/2)
return m, nil
// Up one line
case "up":
fallthrough
case "k":
m.Y = max(0, m.Y-1)
return m, nil
// Down one line
case "down":
fallthrough
case "j":
m.Y = min(len(m.lines)-m.Height, m.Y+1)
return m, nil
// Re-render
case "ctrl+l":
return m, getTerminalSize
}
case errMsg:
m.Err = msg
return m, nil
case terminalSizeMsg:
m.Width = msg.width
m.Height = msg.height
m.State = StateReady
return m, nil
}
return model, nil
}
// VIEW
func View(model boba.Model) string {
m, ok := model.(Model)
if !ok {
return "could not perform assertion on model in view in pager; are you sure you passed the correct model?"
}
if m.Err != nil {
return m.Err.Error()
}
if len(m.lines) == 0 {
return "(Buffer empty)"
}
if m.State == StateReady {
// Render viewport
top := max(0, m.Y)
bottom := min(len(m.lines), m.Y+m.Height)
lines := m.lines[top:bottom]
return "\n" + strings.Join(lines, "\n")
}
return ""
}
// CMD
func getTerminalSize() boba.Msg {
w, h, err := terminal.GetSize(int(os.Stdout.Fd()))
if err != nil {
return errMsg(err)
}
return terminalSizeMsg{w, h}
}
// ETC
func min(a, b int) int {
if a < b {
return a
}
return b
}
func max(a, b int) int {
if a > b {
return a
}
return b
}

183
paginator/paginator.go Normal file
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// package paginator provides a Boba package for calulating pagination and
// rendering pagination info. Note that this package does not render actual
// pages: it's purely for handling keystrokes related to pagination, and
// rendering pagination status.
package paginator
import (
"fmt"
"github.com/charmbracelet/boba"
)
// PaginatorType specifies the way we render pagination
type PaginatorType int
// Pagination rendering options
const (
Arabic PaginatorType = iota
Dots
)
// Model is the Boba model for this user interface
type Model struct {
Type PaginatorType
Page int
PerPage int
TotalPages int
ActiveDot string
InactiveDot string
ArabicFormat string
UseLeftRightKeys bool
UseUpDownKeys bool
UseHLKeys bool
UseJKKeys bool
}
// SetTotalPages is a helper function for calculatng the total number of pages
// from a given number of items. It's use is optional since this pager can be
// used for other things beyond navigating sets. Note that it both returns the
// number of total pages and alters the model.
func (m *Model) SetTotalPages(items int) int {
if items == 0 {
return 0
}
n := items / m.PerPage
if items%m.PerPage > 0 {
n += 1
}
m.TotalPages = n
return n
}
// ItemsOnPage is a helper function fro returning the numer of items on the
// current page given the total numer of items passed as an argument.
func (m Model) ItemsOnPage(totalItems int) int {
start, end := m.GetSliceBounds(totalItems)
return end - start
}
// GetSliceBounds is a helper function for paginating slices. Pass the length
// of the slice you're rendering and you'll receive the start and end bounds
// corresponding the to pagination. For example:
//
// bunchOfStuff := []stuff{...}
// start, end := model.GetSliceBounds(len(bunchOfStuff))
// sliceToRender := bunchOfStuff[start:end]
//
func (m *Model) GetSliceBounds(length int) (start int, end int) {
start = m.Page * m.PerPage
end = min(m.Page*m.PerPage+m.PerPage, length)
return start, end
}
// PrevPage is a number function for navigating one page backward. It will not
// page beyond the first page (i.e. page 0).
func (m *Model) PrevPage() {
if m.Page > 0 {
m.Page--
}
}
// NextPage is a helper function for navigating one page forward. It will not
// page beyond the last page (i.e. totalPages - 1).
func (m *Model) NextPage() {
if m.Page < m.TotalPages-1 {
m.Page++
}
}
// NewModel creates a new model with defaults
func NewModel() Model {
return Model{
Type: Arabic,
Page: 0,
PerPage: 1,
TotalPages: 1,
ActiveDot: "•",
InactiveDot: "○",
ArabicFormat: "%d/%d",
UseLeftRightKeys: true,
UseUpDownKeys: false,
UseHLKeys: true,
UseJKKeys: false,
}
}
// Update is the Boba update function which binds keystrokes to pagination
func Update(msg boba.Msg, m Model) (Model, boba.Cmd) {
switch msg := msg.(type) {
case boba.KeyMsg:
if m.UseLeftRightKeys {
switch msg.String() {
case "left":
m.PrevPage()
case "right":
m.NextPage()
}
}
if m.UseUpDownKeys {
switch msg.String() {
case "up":
m.PrevPage()
case "down":
m.NextPage()
}
}
if m.UseHLKeys {
switch msg.String() {
case "h":
m.PrevPage()
case "l":
m.NextPage()
}
}
if m.UseJKKeys {
switch msg.String() {
case "j":
m.PrevPage()
case "k":
m.NextPage()
}
}
}
return m, nil
}
// View renders the pagination to a string
func View(model boba.Model) string {
m, ok := model.(Model)
if !ok {
return "could not perform assertion on model"
}
switch m.Type {
case Dots:
return dotsView(m)
default:
return arabicView(m)
}
}
func dotsView(m Model) string {
var s string
for i := 0; i < m.TotalPages; i++ {
if i == m.Page {
s += m.ActiveDot
continue
}
s += m.InactiveDot
}
return s
}
func arabicView(m Model) string {
return fmt.Sprintf(m.ArabicFormat, m.Page+1, m.TotalPages)
}
func min(a, b int) int {
if a < b {
return a
}
return b
}

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spinner/spinner.go Normal file
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package spinner
import (
"errors"
"time"
"github.com/charmbracelet/boba"
"github.com/muesli/termenv"
)
// Spinner denotes a type of spinner
type Spinner = int
// Available types of spinners
const (
Line Spinner = iota
Dot
)
var (
// Spinner frames
spinners = map[Spinner][]string{
Line: {"|", "/", "-", "\\"},
Dot: {"⣾ ", "⣽ ", "⣻ ", "⢿ ", "⡿ ", "⣟ ", "⣯ ", "⣷ "},
}
assertionErr = errors.New("could not perform assertion on model to what the spinner expects. are you sure you passed the right value?")
color = termenv.ColorProfile().Color
)
// Model contains the state for the spinner. Use NewModel to create new models
// rather than using Model as a struct literal.
type Model struct {
Type Spinner
FPS int
ForegroundColor string
BackgroundColor string
frame int
}
// NewModel returns a model with default values
func NewModel() Model {
return Model{
Type: Line,
FPS: 9,
frame: 0,
}
}
// TickMsg indicates that the timer has ticked and we should render a frame
type TickMsg time.Time
// Update is the Boba update function
func Update(msg boba.Msg, m Model) (Model, boba.Cmd) {
switch msg.(type) {
case TickMsg:
m.frame++
if m.frame >= len(spinners[m.Type]) {
m.frame = 0
}
return m, nil
default:
return m, nil
}
}
// View renders the model's view
func View(model Model) string {
s := spinners[model.Type]
if model.frame >= len(s) {
return "[error]"
}
str := s[model.frame]
if model.ForegroundColor != "" || model.BackgroundColor != "" {
return termenv.
String(str).
Foreground(color(model.ForegroundColor)).
Background(color(model.BackgroundColor)).
String()
}
return str
}
// GetSub creates the subscription that allows the spinner to spin. Remember
// that you need to execute this function in order to get the subscription
// you'll need.
func MakeSub(model boba.Model) (boba.Sub, error) {
m, ok := model.(Model)
if !ok {
return nil, assertionErr
}
return boba.Tick(time.Second/time.Duration(m.FPS), func(t time.Time) boba.Msg {
return TickMsg(t)
}), nil
}

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textinput/textinput.go Normal file
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package textinput
import (
"errors"
"time"
"github.com/charmbracelet/boba"
"github.com/muesli/termenv"
)
var (
// color is a helper for returning colors
color func(s string) termenv.Color = termenv.ColorProfile().Color
)
// ErrMsg indicates there's been an error. We don't handle errors in the this
// package; we're expecting errors to be handle in the program that implements
// this text input.
type ErrMsg error
// Model is the Boba model for this text input element
type Model struct {
Err error
Prompt string
Value string
Cursor string
BlinkSpeed time.Duration
Placeholder string
TextColor string
PlaceholderColor string
CursorColor string
// CharLimit is the maximum amount of characters this input element will
// accept. If 0 or less, there's no limit.
CharLimit int
// Focus indicates whether user input focus should be on this input
// component. When false, don't blink and ignore keyboard input.
focus bool
blink bool
pos int
}
// 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.blink = false
}
// Blur removes the focus state on the model
func (m *Model) Blur() {
m.focus = false
m.blink = true
}
// colorText colorizes a given string according to the TextColor value of the
// model
func (m *Model) colorText(s string) string {
return termenv.
String(s).
Foreground(color(m.TextColor)).
String()
}
// colorPlaceholder colorizes a given string according to the TextColor value
// of the model
func (m *Model) colorPlaceholder(s string) string {
return termenv.
String(s).
Foreground(color(m.PlaceholderColor)).
String()
}
// CursorBlinkMsg is sent when the cursor should alternate it's blinking state
type CursorBlinkMsg struct{}
// NewModel creates a new model with default settings
func NewModel() Model {
return Model{
Prompt: "> ",
Value: "",
BlinkSpeed: time.Millisecond * 600,
Placeholder: "",
TextColor: "",
PlaceholderColor: "240",
CursorColor: "",
CharLimit: 0,
focus: false,
blink: true,
pos: 0,
}
}
// Update is the Boba update loop
func Update(msg boba.Msg, m Model) (Model, boba.Cmd) {
if !m.focus {
m.blink = true
return m, nil
}
switch msg := msg.(type) {
case boba.KeyMsg:
switch msg.Type {
case boba.KeyBackspace:
fallthrough
case boba.KeyDelete:
if len(m.Value) > 0 {
m.Value = m.Value[:m.pos-1] + m.Value[m.pos:]
m.pos--
}
return m, nil
case boba.KeyLeft:
if m.pos > 0 {
m.pos--
}
return m, nil
case boba.KeyRight:
if m.pos < len(m.Value) {
m.pos++
}
return m, nil
case boba.KeyCtrlF: // ^F, forward one character
fallthrough
case boba.KeyCtrlB: // ^B, back one charcter
fallthrough
case boba.KeyCtrlA: // ^A, go to beginning
m.pos = 0
return m, nil
case boba.KeyCtrlD: // ^D, delete char under cursor
if len(m.Value) > 0 && m.pos < len(m.Value) {
m.Value = m.Value[:m.pos] + m.Value[m.pos+1:]
}
return m, nil
case boba.KeyCtrlE: // ^E, go to end
m.pos = len(m.Value)
return m, nil
case boba.KeyCtrlK: // ^K, kill text after cursor
m.Value = m.Value[:m.pos]
m.pos = len(m.Value)
return m, nil
case boba.KeyCtrlU: // ^U, kill text before cursor
m.Value = m.Value[m.pos:]
m.pos = 0
return m, nil
case boba.KeyRune: // input a regular character
if m.CharLimit <= 0 || len(m.Value) < m.CharLimit {
m.Value = m.Value[:m.pos] + string(msg.Rune) + m.Value[m.pos:]
m.pos++
}
return m, nil
default:
return m, nil
}
case ErrMsg:
m.Err = msg
return m, nil
case CursorBlinkMsg:
m.blink = !m.blink
return m, nil
default:
return m, nil
}
}
// View renders the textinput in its current state
func View(model boba.Model) string {
m, ok := model.(Model)
if !ok {
return "could not perform assertion on model"
}
// Placeholder text
if m.Value == "" && m.Placeholder != "" {
return placeholderView(m)
}
v := m.colorText(m.Value[:m.pos])
if m.pos < len(m.Value) {
v += cursorView(string(m.Value[m.pos]), m)
v += m.colorText(m.Value[m.pos+1:])
} else {
v += cursorView(" ", m)
}
return m.Prompt + v
}
// placeholderView
func placeholderView(m Model) string {
var (
v string
p = m.Placeholder
)
// Cursor
if m.blink && m.PlaceholderColor != "" {
v += cursorView(
m.colorPlaceholder(p[:1]),
m,
)
} else {
v += cursorView(p[:1], m)
}
// The rest of the placeholder text
v += m.colorPlaceholder(p[1:])
return m.Prompt + v
}
// cursorView style the cursor
func cursorView(s string, m Model) string {
if m.blink {
return s
}
return termenv.String(s).
Foreground(color(m.CursorColor)).
Reverse().
String()
}
// MakeSub return a subscription that lets us know when to alternate the
// blinking of the cursor.
func MakeSub(model boba.Model) (boba.Sub, error) {
m, ok := model.(Model)
if !ok {
return nil, errors.New("could not assert given model to the model we expected; make sure you're passing as input model")
}
return func() boba.Msg {
time.Sleep(m.BlinkSpeed)
return CursorBlinkMsg{}
}, nil
}