130 lines
2.5 KiB
Go
130 lines
2.5 KiB
Go
package widgets
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import (
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tb "github.com/nsf/termbox-go"
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"git.sr.ht/~sircmpwn/aerc2/lib/ui"
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)
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// TODO: history
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// TODO: tab completion
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// TODO: commit
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// TODO: cancel (via esc/ctrl+c)
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// TODO: scrolling
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type ExLine struct {
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command *string
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commit func(cmd *string)
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index int
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scroll int
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onInvalidate func(d ui.Drawable)
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}
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func NewExLine() *ExLine {
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cmd := ""
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return &ExLine{command: &cmd}
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}
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func (ex *ExLine) OnInvalidate(onInvalidate func(d ui.Drawable)) {
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ex.onInvalidate = onInvalidate
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}
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func (ex *ExLine) Invalidate() {
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if ex.onInvalidate != nil {
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ex.onInvalidate(ex)
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}
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}
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func (ex *ExLine) Draw(ctx *ui.Context) {
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cell := tb.Cell{
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Fg: tb.ColorDefault,
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Bg: tb.ColorDefault,
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Ch: ' ',
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}
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ctx.Fill(0, 0, ctx.Width(), ctx.Height(), cell)
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ctx.Printf(0, 0, cell, ":%s", *ex.command)
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tb.SetCursor(ctx.X()+ex.index-ex.scroll+1, ctx.Y())
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}
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func (ex *ExLine) insert(ch rune) {
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newCmd := (*ex.command)[:ex.index] + string(ch) + (*ex.command)[ex.index:]
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ex.command = &newCmd
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ex.index++
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ex.Invalidate()
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}
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func (ex *ExLine) deleteWord() {
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// TODO: Break on any of / " '
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if len(*ex.command) == 0 {
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return
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}
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i := ex.index - 1
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if (*ex.command)[i] == ' ' {
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i--
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}
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for ; i >= 0; i-- {
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if (*ex.command)[i] == ' ' {
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break
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}
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}
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newCmd := (*ex.command)[:i+1] + (*ex.command)[ex.index:]
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ex.command = &newCmd
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ex.index = i + 1
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ex.Invalidate()
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}
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func (ex *ExLine) deleteChar() {
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if len(*ex.command) > 0 && ex.index != len(*ex.command) {
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newCmd := (*ex.command)[:ex.index] + (*ex.command)[ex.index+1:]
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ex.command = &newCmd
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ex.Invalidate()
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}
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}
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func (ex *ExLine) backspace() {
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if len(*ex.command) > 0 && ex.index != 0 {
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newCmd := (*ex.command)[:ex.index-1] + (*ex.command)[ex.index:]
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ex.command = &newCmd
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ex.index--
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ex.Invalidate()
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}
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}
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func (ex *ExLine) Event(event tb.Event) bool {
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switch event.Type {
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case tb.EventKey:
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switch event.Key {
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case tb.KeySpace:
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ex.insert(' ')
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case tb.KeyBackspace, tb.KeyBackspace2:
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ex.backspace()
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case tb.KeyCtrlD, tb.KeyDelete:
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ex.deleteChar()
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case tb.KeyCtrlB, tb.KeyArrowLeft:
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if ex.index > 0 {
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ex.index--
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ex.Invalidate()
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}
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case tb.KeyCtrlF, tb.KeyArrowRight:
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if ex.index < len(*ex.command) {
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ex.index++
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ex.Invalidate()
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}
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case tb.KeyCtrlA, tb.KeyHome:
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ex.index = 0
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ex.Invalidate()
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case tb.KeyCtrlE, tb.KeyEnd:
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ex.index = len(*ex.command)
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ex.Invalidate()
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case tb.KeyCtrlW:
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ex.deleteWord()
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default:
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if event.Ch != 0 {
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ex.insert(event.Ch)
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}
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}
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}
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return true
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}
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