compose: add sign/encrypt persistent display

Add a text row below the header editors to (persistently) display if the
current message will be signed, encrypted, or both. The display will
disappear if the message will not be signed or encrypted. The display
is visible on the reviewMessage screen as well

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Tested-by: Koni Marti <koni.marti@gmail.com>

widgets/compose.go

@@ -48,6 +48,7 @@ type Composer struct {
 	review      *reviewMessage
 	worker      *types.Worker
 	completer   *completer.Completer
+	crypto      *cryptoStatus
 	sign        bool
 	encrypt     bool
 
@@ -114,6 +115,7 @@ func NewComposer(aerc *Aerc, acct *AccountView, conf *config.AercConfig,
 	c.AddSignature()
 
 	c.updateGrid()
+	c.updateCrypto()
 	c.ShowTerminal()
 
 	return c, nil
@@ -176,6 +178,7 @@ func (c *Composer) Sent() bool {
 
 func (c *Composer) SetSign(sign bool) *Composer {
 	c.sign = sign
+	c.updateCrypto()
 	return c
 }
 
@@ -185,6 +188,7 @@ func (c *Composer) Sign() bool {
 
 func (c *Composer) SetEncrypt(encrypt bool) *Composer {
 	c.encrypt = encrypt
+	c.updateCrypto()
 	return c
 }
 
@@ -192,6 +196,36 @@ func (c *Composer) Encrypt() bool {
 	return c.encrypt
 }
 
+func (c *Composer) updateCrypto() {
+	if c.crypto == nil {
+		c.crypto = newCryptoStatus(&c.config.Ui)
+	}
+	crHeight := 0
+	st := ""
+	switch {
+	case c.sign && c.encrypt:
+		st = "Sign & Encrypt"
+		crHeight = 1
+	case c.sign:
+		st = "Sign"
+		crHeight = 1
+	case c.encrypt:
+		st = "Encrypt"
+		crHeight = 1
+	default:
+		st = ""
+	}
+	c.crypto.status.Text(st)
+	hHeight := len(c.layout)
+	c.grid.Rows([]ui.GridSpec{
+		{Strategy: ui.SIZE_EXACT, Size: ui.Const(hHeight)},
+		{Strategy: ui.SIZE_EXACT, Size: ui.Const(crHeight)},
+		{Strategy: ui.SIZE_EXACT, Size: ui.Const(1)},
+		{Strategy: ui.SIZE_WEIGHT, Size: ui.Const(1)},
+	})
+	c.grid.AddChild(c.crypto).At(1, 0)
+}
+
 // Note: this does not reload the editor. You must call this before the first
 // Draw() call.
 func (c *Composer) SetContents(reader io.Reader) *Composer {
@@ -631,7 +665,7 @@ func (c *Composer) resetReview() {
 	if c.review != nil {
 		c.grid.RemoveChild(c.review)
 		c.review = newReviewMessage(c, nil)
-		c.grid.AddChild(c.review).At(2, 0)
+		c.grid.AddChild(c.review).At(3, 0)
 	}
 }
 
@@ -650,7 +684,7 @@ func (c *Composer) termEvent(event tcell.Event) bool {
 func (c *Composer) termClosed(err error) {
 	c.grid.RemoveChild(c.editor)
 	c.review = newReviewMessage(c, err)
-	c.grid.AddChild(c.review).At(2, 0)
+	c.grid.AddChild(c.review).At(3, 0)
 	c.editor.Destroy()
 	c.editor = nil
 	c.focusable = c.focusable[:len(c.focusable)-1]
@@ -677,7 +711,7 @@ func (c *Composer) ShowTerminal() {
 	c.editor, _ = NewTerminal(editor) // TODO: handle error
 	c.editor.OnEvent = c.termEvent
 	c.editor.OnClose = c.termClosed
-	c.grid.AddChild(c.editor).At(2, 0)
+	c.grid.AddChild(c.editor).At(3, 0)
 	c.focusable = append(c.focusable, c.editor)
 }
 
@@ -762,9 +796,13 @@ func (c *Composer) updateGrid() {
 			{Strategy: ui.SIZE_WEIGHT, Size: ui.Const(1)},
 		})
 	}
-
+	crHeight := 0
+	if c.sign || c.encrypt {
+		crHeight = 1
+	}
 	c.grid.Rows([]ui.GridSpec{
 		{Strategy: ui.SIZE_EXACT, Size: ui.Const(height)},
+		{Strategy: ui.SIZE_EXACT, Size: ui.Const(crHeight)},
 		{Strategy: ui.SIZE_EXACT, Size: ui.Const(1)},
 		{Strategy: ui.SIZE_WEIGHT, Size: ui.Const(1)},
 	})
@@ -776,7 +814,7 @@ func (c *Composer) updateGrid() {
 	borderChar := c.acct.UiConfig().BorderCharHorizontal
 	c.heditors = heditors
 	c.grid.AddChild(c.heditors).At(0, 0)
-	c.grid.AddChild(ui.NewFill(borderChar, borderStyle)).At(1, 0)
+	c.grid.AddChild(ui.NewFill(borderChar, borderStyle)).At(2, 0)
 }
 
 func (c *Composer) reloadEmail() error {
@@ -1019,3 +1057,38 @@ func (rm *reviewMessage) OnInvalidate(fn func(ui.Drawable)) {
 func (rm *reviewMessage) Draw(ctx *ui.Context) {
 	rm.grid.Draw(ctx)
 }
+
+type cryptoStatus struct {
+	title    string
+	status   *ui.Text
+	uiConfig *config.UIConfig
+}
+
+func newCryptoStatus(uiConfig *config.UIConfig) *cryptoStatus {
+	defaultStyle := uiConfig.GetStyle(config.STYLE_DEFAULT)
+	return &cryptoStatus{
+		title:    "Security",
+		status:   ui.NewText("", defaultStyle),
+		uiConfig: uiConfig,
+	}
+}
+
+func (cs *cryptoStatus) Draw(ctx *ui.Context) {
+	// Extra character to put a blank cell between the header and the input
+	size := runewidth.StringWidth(cs.title+":") + 1
+	defaultStyle := cs.uiConfig.GetStyle(config.STYLE_DEFAULT)
+	titleStyle := cs.uiConfig.GetStyle(config.STYLE_HEADER)
+	ctx.Fill(0, 0, size, ctx.Height(), ' ', defaultStyle)
+	ctx.Printf(0, 0, titleStyle, "%s:", cs.title)
+	cs.status.Draw(ctx.Subcontext(size, 0, ctx.Width()-size, 1))
+}
+
+func (cs *cryptoStatus) Invalidate() {
+	cs.status.Invalidate()
+}
+
+func (cs *cryptoStatus) OnInvalidate(fn func(ui.Drawable)) {
+	cs.status.OnInvalidate(func(_ ui.Drawable) {
+		fn(cs)
+	})
+}