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generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-12-29 02:07:28 +0000


 


gets/msglist.go?h=0.5.0&id=fca7321639f77bbf825dc897156d7a21993a2c69'>^

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pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
package ui

import (
	"math"
	"time"

	"github.com/gdamore/tcell"
	"github.com/mattn/go-runewidth"
)

// 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
}

// 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) *TextInput {
	return &TextInput{
		cells: -1,
		text:  []rune(text),
		index: len([]rune(text)),
	}
}

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
	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)

	text := ti.text[scroll:]
	sindex := ti.index - scroll
	if ti.password {
		x := ctx.Printf(0, 0, tcell.StyleDefault, "%s", ti.prompt)
		cells := runewidth.StringWidth(string(text))
		ctx.Fill(x, 0, cells, 1, '*', tcell.StyleDefault)
	} else {
		ctx.Printf(0, 0, tcell.StyleDefault, "%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()
		},
	}
	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
	}
	// God why am I this lazy
	for ti.index-ti.scroll >= ti.ctx.Width() {
		ti.scroll++
	}
	for ti.index-ti.scroll < 0 {
		ti.scroll--
	}
}

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 {
		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()
	}
}

func (ti *TextInput) executeCompletion() {
	if len(ti.completions) > 0 {
		ti.Set(ti.completions[ti.completeIndex] + ti.StringRight())
	}
}

func (ti *TextInput) invalidateCompletions() {
	ti.completions = nil
}

func (ti *TextInput) onChange() {
	ti.updateCompletions()
	for _, change := range ti.change {
		change(ti)
	}
}

func (ti *TextInput) updateCompletions() {
	if ti.tabcomplete == nil {
		// no completer
		return
	}
	if ti.completeDebouncer == nil {
		ti.completeDebouncer = time.AfterFunc(ti.completeDelay, func() {
			ti.showCompletions()
		})
	} else {
		ti.completeDebouncer.Stop()
		ti.completeDebouncer.Reset(ti.completeDelay)
	}
}

func (ti *TextInput) showCompletions() {
	ti.completions = ti.tabcomplete(ti.StringLeft())
	ti.completeIndex = 0
	ti.Invalidate()
}

func (ti *TextInput) OnChange(onChange func(ti *TextInput)) {
	ti.change = append(ti.change, onChange)
}

func (ti *TextInput) Event(event tcell.Event) bool {
	switch event := event.(type) {
	case *tcell.EventKey:
		switch event.Key() {
		case tcell.KeyBackspace, tcell.KeyBackspace2:
			ti.invalidateCompletions()
			ti.backspace()
		case tcell.KeyCtrlD, tcell.KeyDelete:
			ti.invalidateCompletions()
			ti.deleteChar()
		case tcell.KeyCtrlB, tcell.KeyLeft:
			ti.invalidateCompletions()
			if ti.index > 0 {
				ti.index--
				ti.ensureScroll()
				ti.Invalidate()
			}
		case tcell.KeyCtrlF, tcell.KeyRight:
			ti.invalidateCompletions()
			if ti.index < len(ti.text) {
				ti.index++
				ti.ensureScroll()
				ti.Invalidate()
			}
		case tcell.KeyCtrlA, tcell.KeyHome:
			ti.invalidateCompletions()
			ti.index = 0
			ti.ensureScroll()
			ti.Invalidate()
		case tcell.KeyCtrlE, tcell.KeyEnd:
			ti.invalidateCompletions()
			ti.index = len(ti.text)
			ti.ensureScroll()
			ti.Invalidate()
		case tcell.KeyCtrlK:
			ti.invalidateCompletions()
			ti.deleteLineForward()
		case tcell.KeyCtrlW:
			ti.invalidateCompletions()
			ti.deleteWord()
		case tcell.KeyCtrlU:
			ti.invalidateCompletions()
			ti.deleteLineBackward()
		case tcell.KeyESC:
			if ti.completions != nil {
				ti.invalidateCompletions()
				ti.Invalidate()
			}
		case tcell.KeyTab:
			ti.showCompletions()
		case tcell.KeyRune:
			ti.invalidateCompletions()
			ti.insert(event.Rune())
		}
	}
	return true
}

type completions struct {
	options    []string
	stringLeft string
	idx        int
	onSelect   func(int)
	onExec     func()
	onStem     func(string)
}

func maxLen(ss []string) int {
	max := 0
	for _, s := range ss {
		l := runewidth.StringWidth(s)
		if l > max {
			max = l
		}
	}
	return max
}

func (c *completions) Draw(ctx *Context) {
	bg := tcell.StyleDefault
	sel := tcell.StyleDefault.Reverse(true)
	gutter := tcell.StyleDefault
	pill := tcell.StyleDefault.Reverse(true)

	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', bg)

	numVisible := ctx.Height()
	startIdx := 0
	if len(c.options) > numVisible && c.idx+1 > numVisible {
		startIdx = c.idx - (numVisible - 1)
	}
	endIdx := startIdx + numVisible - 1

	for idx, opt := range c.options {
		if idx < startIdx {
			continue
		}
		if idx > endIdx {
			continue
		}
		if c.idx == idx {
			ctx.Fill(0, idx-startIdx, ctx.Width(), 1, ' ', sel)
			ctx.Printf(0, idx-startIdx, sel, " %s ", opt)
		} else {
			ctx.Printf(0, idx-startIdx, bg, " %s ", opt)
		}
	}

	percentVisible := float64(numVisible) / float64(len(c.options))
	if percentVisible >= 1.0 {
		return
	}

	// gutter
	ctx.Fill(ctx.Width()-1, 0, 1, ctx.Height(), ' ', gutter)

	pillSize := int(math.Ceil(float64(ctx.Height()) * percentVisible))
	percentScrolled := float64(startIdx) / float64(len(c.options))
	pillOffset := int(math.Floor(float64(ctx.Height()) * percentScrolled))
	ctx.Fill(ctx.Width()-1, pillOffset, 1, pillSize, ' ', pill)
}

func (c *completions) next() {
	idx := c.idx
	idx++
	if idx > len(c.options)-1 {
		idx = 0
	}
	c.onSelect(idx)
}

func (c *completions) prev() {
	idx := c.idx
	idx--
	if idx < 0 {
		idx = len(c.options) - 1
	}
	c.onSelect(idx)
}

func (c *completions) Event(e tcell.Event) bool {
	switch e := e.(type) {
	case *tcell.EventKey:
		switch e.Key() {
		case tcell.KeyTab:
			if len(c.options) == 1 {
				c.onExec()
			} else {
				stem := findStem(c.options)
				if stem != "" && stem != c.stringLeft {
					c.onStem(stem)
				} else {
					c.next()
				}
			}
			return true
		case tcell.KeyCtrlN, tcell.KeyDown:
			c.next()
			return true
		case tcell.KeyBacktab, tcell.KeyCtrlP, tcell.KeyUp:
			c.prev()
			return true
		case tcell.KeyEnter:
			c.onExec()
			return true
		}
	}
	return false
}

func findStem(words []string) string {
	if len(words) <= 0 {
		return ""
	}
	if len(words) == 1 {
		return words[0]
	}
	var stem string
	stemLen := 1
	firstWord := []rune(words[0])
	for {
		if len(firstWord) < stemLen {
			return stem
		}
		var r rune = firstWord[stemLen-1]
		for _, word := range words[1:] {
			runes := []rune(word)
			if len(runes) < stemLen {
				return stem
			}
			if runes[stemLen-1] != r {
				return stem
			}
		}
		stem = stem + string(r)
		stemLen++
	}
}

func (c *completions) Focus(_ bool) {}

func (c *completions) Invalidate() {}

func (c *completions) OnInvalidate(_ func(Drawable)) {}





 

generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-12-29 02:07:29 +0000