1 files changed, 120 insertions, 0 deletions
diff --git a/app/exline.go b/app/exline.go
new file mode 100644
index 00000000..b941b100
--- /dev/null
+++ b/app/exline.go
@@ -0,0 +1,120 @@
+package app
+
+import (
+	"github.com/gdamore/tcell/v2"
+
+	"git.sr.ht/~rjarry/aerc/config"
+	"git.sr.ht/~rjarry/aerc/lib"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
+)
+
+type ExLine struct {
+	commit      func(cmd string)
+	finish      func()
+	tabcomplete func(cmd string) ([]string, string)
+	cmdHistory  lib.History
+	input       *ui.TextInput
+}
+
+func NewExLine(cmd string, commit func(cmd string), finish func(),
+	tabcomplete func(cmd string) ([]string, string),
+	cmdHistory lib.History,
+) *ExLine {
+	input := ui.NewTextInput("", config.Ui).Prompt(":").Set(cmd)
+	if config.Ui.CompletionPopovers {
+		input.TabComplete(
+			tabcomplete,
+			config.Ui.CompletionDelay,
+			config.Ui.CompletionMinChars,
+		)
+	}
+	exline := &ExLine{
+		commit:      commit,
+		finish:      finish,
+		tabcomplete: tabcomplete,
+		cmdHistory:  cmdHistory,
+		input:       input,
+	}
+	return exline
+}
+
+func (x *ExLine) TabComplete(tabComplete func(string) ([]string, string)) {
+	x.input.TabComplete(
+		tabComplete,
+		config.Ui.CompletionDelay,
+		config.Ui.CompletionMinChars,
+	)
+}
+
+func NewPrompt(prompt string, commit func(text string),
+	tabcomplete func(cmd string) ([]string, string),
+) *ExLine {
+	input := ui.NewTextInput("", config.Ui).Prompt(prompt)
+	if config.Ui.CompletionPopovers {
+		input.TabComplete(
+			tabcomplete,
+			config.Ui.CompletionDelay,
+			config.Ui.CompletionMinChars,
+		)
+	}
+	exline := &ExLine{
+		commit:      commit,
+		tabcomplete: tabcomplete,
+		cmdHistory:  &nullHistory{input: input},
+		input:       input,
+	}
+	return exline
+}
+
+func (ex *ExLine) Invalidate() {
+	ui.Invalidate()
+}
+
+func (ex *ExLine) Draw(ctx *ui.Context) {
+	ex.input.Draw(ctx)
+}
+
+func (ex *ExLine) Focus(focus bool) {
+	ex.input.Focus(focus)
+}
+
+func (ex *ExLine) Event(event tcell.Event) bool {
+	if event, ok := event.(*tcell.EventKey); ok {
+		switch event.Key() {
+		case tcell.KeyEnter, tcell.KeyCtrlJ:
+			cmd := ex.input.String()
+			ex.input.Focus(false)
+			ex.commit(cmd)
+			ex.finish()
+		case tcell.KeyUp:
+			ex.input.Set(ex.cmdHistory.Prev())
+			ex.Invalidate()
+		case tcell.KeyDown:
+			ex.input.Set(ex.cmdHistory.Next())
+			ex.Invalidate()
+		case tcell.KeyEsc, tcell.KeyCtrlC:
+			ex.input.Focus(false)
+			ex.cmdHistory.Reset()
+			ex.finish()
+		default:
+			return ex.input.Event(event)
+		}
+	}
+	return true
+}
+
+type nullHistory struct {
+	input *ui.TextInput
+}
+
+func (*nullHistory) Add(string) {}
+
+func (h *nullHistory) Next() string {
+	return h.input.String()
+}
+
+func (h *nullHistory) Prev() string {
+	return h.input.String()
+}
+
+func (*nullHistory) Reset() {}