From 8fa458323058c8998408f88b80d07c687fccd521 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Sat, 11 May 2019 13:12:44 -0400
Subject: Split ex line text handling into dedicated widget

---
 widgets/exline.go | 116 +++++++++---------------------------------------------
 1 file changed, 18 insertions(+), 98 deletions(-)

(limited to 'widgets/exline.go')

diff --git a/widgets/exline.go b/widgets/exline.go
index 8b18736..c841802 100644
--- a/widgets/exline.go
+++ b/widgets/exline.go
@@ -2,36 +2,29 @@ package widgets
 
 import (
 	"github.com/gdamore/tcell"
-	"github.com/mattn/go-runewidth"
 
 	"git.sr.ht/~sircmpwn/aerc2/lib/ui"
 )
 
-// TODO: history
-// TODO: tab completion
-// TODO: scrolling
-
 type ExLine struct {
 	ui.Invalidatable
-	command []rune
-	commit  func(cmd string)
-	ctx     *ui.Context
-	cancel  func()
-	cells   int
-	focus   bool
-	index   int
-	scroll  int
-
-	onInvalidate func(d ui.Drawable)
+	cancel func()
+	commit func(cmd string)
+	ctx    *ui.Context
+	input  *ui.TextInput
 }
 
 func NewExLine(commit func(cmd string), cancel func()) *ExLine {
-	return &ExLine{
-		cancel:  cancel,
-		cells:   -1,
-		commit:  commit,
-		command: []rune{},
+	input := ui.NewTextInput().Prompt(":")
+	exline := &ExLine{
+		cancel: cancel,
+		commit: commit,
+		input:  input,
 	}
+	input.OnInvalidate(func(d ui.Drawable) {
+		exline.Invalidate()
+	})
+	return exline
 }
 
 func (ex *ExLine) Invalidate() {
@@ -40,102 +33,29 @@ func (ex *ExLine) Invalidate() {
 
 func (ex *ExLine) Draw(ctx *ui.Context) {
 	ex.ctx = ctx // gross
-	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
-	ctx.Printf(0, 0, tcell.StyleDefault, ":%s", string(ex.command))
-	cells := runewidth.StringWidth(string(ex.command[:ex.index]))
-	if cells != ex.cells {
-		ctx.SetCursor(cells+1, 0)
-	}
+	ex.input.Draw(ctx)
 }
 
 func (ex *ExLine) Focus(focus bool) {
-	ex.focus = focus
-	if focus && ex.ctx != nil {
-		cells := runewidth.StringWidth(string(ex.command[:ex.index]))
-		ex.ctx.SetCursor(cells+1, 0)
-	}
-}
-
-func (ex *ExLine) insert(ch rune) {
-	left := ex.command[:ex.index]
-	right := ex.command[ex.index:]
-	ex.command = append(left, append([]rune{ch}, right...)...)
-	ex.index++
-	ex.Invalidate()
-}
-
-func (ex *ExLine) deleteWord() {
-	// TODO: Break on any of / " '
-	if len(ex.command) == 0 {
-		return
-	}
-	i := ex.index - 1
-	if ex.command[i] == ' ' {
-		i--
-	}
-	for ; i >= 0; i-- {
-		if ex.command[i] == ' ' {
-			break
-		}
-	}
-	ex.command = append(ex.command[:i+1], ex.command[ex.index:]...)
-	ex.index = i + 1
-	ex.Invalidate()
-}
-
-func (ex *ExLine) deleteChar() {
-	if len(ex.command) > 0 && ex.index != len(ex.command) {
-		ex.command = append(ex.command[:ex.index], ex.command[ex.index+1:]...)
-		ex.Invalidate()
-	}
-}
-
-func (ex *ExLine) backspace() {
-	if len(ex.command) > 0 && ex.index != 0 {
-		ex.command = append(ex.command[:ex.index-1], ex.command[ex.index:]...)
-		ex.index--
-		ex.Invalidate()
-	}
+	ex.input.Focus(focus)
 }
 
 func (ex *ExLine) Event(event tcell.Event) bool {
 	switch event := event.(type) {
 	case *tcell.EventKey:
 		switch event.Key() {
-		case tcell.KeyBackspace, tcell.KeyBackspace2:
-			ex.backspace()
-		case tcell.KeyCtrlD, tcell.KeyDelete:
-			ex.deleteChar()
-		case tcell.KeyCtrlB, tcell.KeyLeft:
-			if ex.index > 0 {
-				ex.index--
-				ex.Invalidate()
-			}
-		case tcell.KeyCtrlF, tcell.KeyRight:
-			if ex.index < len(ex.command) {
-				ex.index++
-				ex.Invalidate()
-			}
-		case tcell.KeyCtrlA, tcell.KeyHome:
-			ex.index = 0
-			ex.Invalidate()
-		case tcell.KeyCtrlE, tcell.KeyEnd:
-			ex.index = len(ex.command)
-			ex.Invalidate()
-		case tcell.KeyCtrlW:
-			ex.deleteWord()
 		case tcell.KeyEnter:
 			if ex.ctx != nil {
 				ex.ctx.HideCursor()
 			}
-			ex.commit(string(ex.command))
+			ex.commit(ex.input.String())
 		case tcell.KeyEsc, tcell.KeyCtrlC:
 			if ex.ctx != nil {
 				ex.ctx.HideCursor()
 			}
 			ex.cancel()
-		case tcell.KeyRune:
-			ex.insert(event.Rune())
+		default:
+			return ex.input.Event(event)
 		}
 	}
 	return true
-- 
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