package ui
import (
"math"
"time"
"github.com/gdamore/tcell/v2"
"github.com/mattn/go-runewidth"
"git.sr.ht/~rjarry/aerc/config"
)
// TODO: Attach history providers
// TODO: scrolling
type TextInput struct {
Invalidatable
cells int
ctx *Context
focus bool
index int
password bool
prompt string
scroll int
text []rune
change []func(ti *TextInput)
tabcomplete func(s string) []string
completions []string
completeIndex int
completeDelay time.Duration
completeDebouncer *time.Timer
uiConfig config.UIConfig
}
// Creates a new TextInput. TextInputs will render a "textbox" in the entire
// context they're given, and process keypresses to build a string from user
// input.
func NewTextInput(text string, ui config.UIConfig) *TextInput {
return &TextInput{
cells: -1,
text: []rune(text),
index: len([]rune(text)),
uiConfig: ui,
}
}
func (ti *TextInput) Password(password bool) *TextInput {
ti.password = password
return ti
}
func (ti *TextInput) Prompt(prompt string) *TextInput {
ti.prompt = prompt
return ti
}
func (ti *TextInput) TabComplete(
tabcomplete func(s string) []string, d time.Duration) *TextInput {
ti.tabcomplete = tabcomplete
ti.completeDelay = d
return ti
}
func (ti *TextInput) String() string {
return string(ti.text)
}
func (ti *TextInput) StringLeft() string {
return string(ti.text[:ti.index])
}
func (ti *TextInput) StringRight() string {
return string(ti.text[ti.index:])
}
func (ti *TextInput) Set(value string) *TextInput {
ti.text = []rune(value)
ti.index = len(ti.text)
return ti
}
func (ti *TextInput) Invalidate() {
ti.DoInvalidate(ti)
}
func (ti *TextInput) Draw(ctx *Context) {
scroll := ti.scroll
if !ti.focus {
scroll = 0
} else {
ti.ensureScroll()
}
ti.ctx = ctx // gross
defaultStyle := ti.uiConfig.GetStyle(config.STYLE_DEFAULT)
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', defaultStyle)
text := ti.text[scroll:]
sindex := ti.index - scroll
if ti.password {
x := ctx.Printf(0, 0, defaultStyle, "%s", ti.prompt)
cells := runewidth.StringWidth(string(text))
ctx.Fill(x, 0, cells, 1, '*', defaultStyle)
} else {
ctx.Printf(0, 0, defaultStyle, "%s%s", ti.prompt, string(text))
}
cells := runewidth.StringWidth(string(text[:sindex]) + ti.prompt)
if ti.focus {
ctx.SetCursor(cells, 0)
ti.drawPopover(ctx)
}
}
func (ti *TextInput) drawPopover(ctx *Context) {
if len(ti.completions) == 0 {
return
}
cmp := &completions{
options: ti.completions,
idx: ti.completeIndex,
stringLeft: ti.StringLeft(),
onSelect: func(idx int) {
ti.completeIndex = idx
ti.Invalidate()
},
onExec: func() {
ti.executeCompletion()
ti.invalidateCompletions()
ti.Invalidate()
},
onStem: func(stem string) {
ti.Set(stem + ti.StringRight())
ti.Invalidate()
},
uiConfig: ti.uiConfig,
}
width := maxLen(ti.completions) + 3
height := len(ti.completions)
ctx.Popover(0, 0, width, height, cmp)
}
func (ti *TextInput) MouseEvent(localX int, localY int, event tcell.Event) {
switch event := event.(type) {
case *tcell.EventMouse:
switch event.Buttons() {
case tcell.Button1:
if localX >= len(ti.prompt)+1 && localX <= len(ti.text[ti.scroll:])+len(ti.prompt)+1 {
ti.index = localX - len(ti.prompt) - 1
ti.ensureScroll()
ti.Invalidate()
}
}
}
}
func (ti *TextInput) Focus(focus bool) {
ti.focus = focus
if focus && ti.ctx != nil {
cells := runewidth.StringWidth(string(ti.text[:ti.index]))
ti.ctx.SetCursor(cells+1, 0)
} else if !focus && ti.ctx != nil {
ti.ctx.HideCursor()
}
}
func (ti *TextInput) ensureScroll() {
if ti.ctx == nil {
return
}
w := ti.ctx.Width() - len(ti.prompt)
if ti.index >= ti.scroll+w {
ti.scroll = ti.index - w + 1
}
if ti.index < ti.scroll {
ti.scroll = ti.index
}
}
func (ti *TextInput) insert(ch rune) {
left := ti.text[:ti.index]
right := ti.text[ti.index:]
ti.text = append(left, append([]rune{ch}, right...)...)
ti.index++
ti.ensureScroll()
ti.Invalidate()
ti.onChange()
}
func (ti *TextInput) deleteWord() {
// TODO: Break on any of / " '
if len(ti.text) == 0 || ti.index <= 0 {
return
}
i := ti.index - 1
if ti.text[i] == ' ' {
i--
}
for ; i >= 0; i-- {
if ti.text[i] == ' ' {
break
}
}
ti.text = append(ti.text[:i+1], ti.text[ti.index:]...)
ti.index = i + 1
ti.ensureScroll()
ti.Invalidate()
ti.onChange()
}
func (ti *TextInput) deleteLineForward() {
if len(ti.text) == 0 || len(ti.text) == ti.index {
return
}
ti.text = ti.text[:ti.index]
ti.ensureScroll()
ti.Invalidate()
ti.onChange()
}
func (ti *TextInput) deleteLineBackward() {
if len(ti.text) == 0 || ti.index == 0 {
return
}
ti.text = ti.text[ti.index:]
ti.index = 0
ti.ensureScroll()
ti.Invalidate()
ti.onChange()
}
func (ti *TextInput) deleteChar() {
if len(ti.text) > 0 && ti.index != len(ti.text) {
ti.text = append(ti.text[:ti.index], ti.text[ti.index+1:]...)
ti.ensureScroll()
ti.Invalidate()
ti.onChange()
}
}
func (ti *TextInput) backspace() {
if len(ti.text) > 0 && ti.index != 0 {
ti.text = append(ti.text[:ti.index-1], ti.text[ti.index:]...)
ti.index--
ti.ensureScroll()
ti.Invalidate()
ti.onChange()