Add UI options to save/pipe messages with unsupported mimetypes

Adds a message indicating the user's ability to :save or :pipe a message
with an unsupported mimetype and also adds a selector widget (similar to
the tutorial).

The selector widget was previously defined in the account wizard module,
so this commit breaks it out into its own module to allow for re-use.

Further, modify the BeginExLine() function to take an argument that
pre-populates the command line, allowing functions to initiate an ex
command without executing it.

Closes #95.

1 files changed, 45 insertions, 13 deletions

diff --git a/widgets/msgviewer.go b/widgets/msgviewer.go
index 4d41923d..aca7dd44 100644
--- a/widgets/msgviewer.go
+++ b/widgets/msgviewer.go
@@ -68,7 +68,7 @@ func NewMessageViewer(acct *AccountView, conf *config.AercConfig,
 	})
 
 	switcher := &PartSwitcher{}
-	err := createSwitcher(switcher, conf, store, msg)
+	err := createSwitcher(acct, switcher, conf, store, msg)
 	if err != nil {
 		return &MessageViewer{
 			err:  err,
@@ -112,7 +112,7 @@ func fmtHeader(msg *models.MessageInfo, header string) string {
 	}
 }
 
-func enumerateParts(conf *config.AercConfig, store *lib.MessageStore,
+func enumerateParts(acct *AccountView, conf *config.AercConfig, store *lib.MessageStore,
 	msg *models.MessageInfo, body *models.BodyStructure,
 	index []int) ([]*PartViewer, error) {
 
@@ -124,14 +124,14 @@ func enumerateParts(conf *config.AercConfig, store *lib.MessageStore,
 			pv := &PartViewer{part: part}
 			parts = append(parts, pv)
 			subParts, err := enumerateParts(
-				conf, store, msg, part, curindex)
+				acct, conf, store, msg, part, curindex)
 			if err != nil {
 				return nil, err
 			}
 			parts = append(parts, subParts...)
 			continue
 		}
-		pv, err := NewPartViewer(conf, store, msg, part, curindex)
+		pv, err := NewPartViewer(acct, conf, store, msg, part, curindex)
 		if err != nil {
 			return nil, err
 		}
@@ -140,7 +140,7 @@ func enumerateParts(conf *config.AercConfig, store *lib.MessageStore,
 	return parts, nil
 }
 
-func createSwitcher(switcher *PartSwitcher, conf *config.AercConfig,
+func createSwitcher(acct *AccountView, switcher *PartSwitcher, conf *config.AercConfig,
 	store *lib.MessageStore, msg *models.MessageInfo) error {
 
 	var err error
@@ -150,7 +150,7 @@ func createSwitcher(switcher *PartSwitcher, conf *config.AercConfig,
 
 	if len(msg.BodyStructure.Parts) == 0 {
 		switcher.selected = 0
-		pv, err := NewPartViewer(conf, store, msg, msg.BodyStructure, []int{1})
+		pv, err := NewPartViewer(acct, conf, store, msg, msg.BodyStructure, []int{1})
 		if err != nil {
 			return err
 		}
@@ -159,7 +159,7 @@ func createSwitcher(switcher *PartSwitcher, conf *config.AercConfig,
 			switcher.Invalidate()
 		})
 	} else {
-		switcher.parts, err = enumerateParts(conf, store,
+		switcher.parts, err = enumerateParts(acct, conf, store,
 			msg, msg.BodyStructure, []int{})
 		if err != nil {
 			return err
@@ -236,7 +236,7 @@ func (mv *MessageViewer) ToggleHeaders() {
 	switcher := mv.switcher
 	mv.conf.Viewer.ShowHeaders = !mv.conf.Viewer.ShowHeaders
 	err := createSwitcher(
-		switcher, mv.conf, mv.store, mv.msg)
+		mv.acct, switcher, mv.conf, mv.store, mv.msg)
 	if err != nil {
 		mv.acct.Logger().Printf(
 			"warning: error during create switcher - %v", err)
@@ -299,10 +299,7 @@ func (ps *PartSwitcher) Focus(focus bool) {
 }
 
 func (ps *PartSwitcher) Event(event tcell.Event) bool {
-	if ps.parts[ps.selected].term != nil {
-		return ps.parts[ps.selected].term.Event(event)
-	}
-	return false
+	return ps.parts[ps.selected].Event(event)
 }
 
 func (ps *PartSwitcher) Draw(ctx *ui.Context) {
@@ -414,9 +411,11 @@ type PartViewer struct {
 	source      io.Reader
 	store       *lib.MessageStore
 	term        *Terminal
+	selecter    *Selecter
+	grid        *ui.Grid
 }
 
-func NewPartViewer(conf *config.AercConfig,
+func NewPartViewer(acct *AccountView, conf *config.AercConfig,
 	store *lib.MessageStore, msg *models.MessageInfo,
 	part *models.BodyStructure,
 	index []int) (*PartViewer, error) {
@@ -475,6 +474,26 @@ func NewPartViewer(conf *config.AercConfig,
 		}
 	}
 
+	grid := ui.NewGrid().Rows([]ui.GridSpec{
+		{ui.SIZE_EXACT, 3}, // Message
+		{ui.SIZE_EXACT, 1}, // Selector
+		{ui.SIZE_WEIGHT, 1},
+	}).Columns([]ui.GridSpec{
+		{ui.SIZE_WEIGHT, 1},
+	})
+
+	selecter := NewSelecter([]string{"Save message", "Pipe to command"}, 0).
+		OnChoose(func(option string) {
+			switch option {
+			case "Save message":
+				acct.aerc.BeginExCommand("save ")
+			case "Pipe to command":
+				acct.aerc.BeginExCommand("pipe ")
+			}
+		})
+
+	grid.AddChild(selecter).At(2, 0)
+
 	pv := &PartViewer{
 		filter:      filter,
 		index:       index,
@@ -486,6 +505,8 @@ func NewPartViewer(conf *config.AercConfig,
 		sink:        pipe,
 		store:       store,
 		term:        term,
+		selecter:    selecter,
+		grid:        grid,
 	}
 
 	if term != nil {
@@ -590,6 +611,10 @@ func (pv *PartViewer) Draw(ctx *ui.Context) {
 		ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
 		ctx.Printf(0, 0, tcell.StyleDefault.Foreground(tcell.ColorRed),
 			"No filter configured for this mimetype")
+		ctx.Printf(0, 2, tcell.StyleDefault,
+			"You can still :save the message or :pipe it to an external command")
+		pv.selecter.Focus(true)
+		pv.grid.Draw(ctx)
 		return
 	}
 	if !pv.fetched {
@@ -611,6 +636,13 @@ func (pv *PartViewer) Cleanup() {
 	}
 }
 
+func (pv *PartViewer) Event(event tcell.Event) bool {
+	if pv.term != nil {
+		return pv.term.Event(event)
+	}
+	return pv.selecter.Event(event)
+}
+
 type HeaderView struct {
 	ui.Invalidatable
 	Name  string