Add :prompt command

Usage:
    :prompt <prompt> <command...>

Displays the prompt on the status bar, waits for user input, then
appends that input as the last argument to the command and executes it.
The input is passed as one argument to the command, unless it is empty,
in which case no extra argument is added.

1 files changed, 32 insertions, 2 deletions

diff --git a/widgets/aerc.go b/widgets/aerc.go
index 5a7914a0..345f3ea4 100644
--- a/widgets/aerc.go
+++ b/widgets/aerc.go
@@ -30,6 +30,7 @@ type Aerc struct {
 	statusbar   *libui.Stack
 	statusline  *StatusLine
 	pendingKeys []config.KeyStroke
+	prompts     *libui.Stack
 	tabs        *libui.Tabs
 	beep        func() error
 }
@@ -65,6 +66,7 @@ func NewAerc(conf *config.AercConfig, logger *log.Logger,
 		logger:     logger,
 		statusbar:  statusbar,
 		statusline: statusline,
+		prompts:    libui.NewStack(),
 		tabs:       tabs,
 	}
 
@@ -105,6 +107,20 @@ func (aerc *Aerc) Tick() bool {
 	for _, acct := range aerc.accounts {
 		more = acct.Tick() || more
 	}
+
+	if len(aerc.prompts.Children()) > 0 {
+		more = true
+		previous := aerc.focused
+		prompt := aerc.prompts.Pop().(*ExLine)
+		prompt.finish = func() {
+			aerc.statusbar.Pop()
+			aerc.focus(previous)
+		}
+
+		aerc.statusbar.Push(prompt)
+		aerc.focus(prompt)
+	}
+
 	return more
 }
 
@@ -358,8 +374,6 @@ func (aerc *Aerc) BeginExCommand() {
 		if aerc.simulating == 0 {
 			aerc.cmdHistory.Add(cmd)
 		}
-		aerc.statusbar.Pop()
-		aerc.focus(previous)
 	}, func() {
 		aerc.statusbar.Pop()
 		aerc.focus(previous)
@@ -370,6 +384,22 @@ func (aerc *Aerc) BeginExCommand() {
 	aerc.focus(exline)
 }
 
+func (aerc *Aerc) RegisterPrompt(prompt string, cmd []string) {
+	p := NewPrompt(prompt, func(text string) {
+		if text != "" {
+			cmd = append(cmd, text)
+		}
+		err := aerc.cmd(cmd)
+		if err != nil {
+			aerc.PushStatus(" "+err.Error(), 10*time.Second).
+				Color(tcell.ColorDefault, tcell.ColorRed)
+		}
+	}, func(cmd string) []string {
+		return nil // TODO: completions
+	})
+	aerc.prompts.Push(p)
+}
+
 func (aerc *Aerc) Mailto(addr *url.URL) error {
 	acct := aerc.SelectedAccount()
 	if acct == nil {