handle ex cmds; you can quit

main.go

@@ -9,17 +9,19 @@ import (
 	"github.com/spf13/cobra"
 )
 
+type mode string
+
 const (
-	NormalMode  = "normal"
-	FocusedMode = "focused"
-	SearchMode  = "search"
-	ExMode      = "ex"
+	modeNormal mode = "normal"
+	modeFocus  mode = "focus"
+	modeSearch mode = "search"
+	modeEx     mode = "ex"
 )
 
 type UI struct {
-	Mode   string
+	Mode   mode
 	App    *tview.Application
-	Fields []Field
+	Fields []field
 
 	// UI things
 	Pages     *tview.Pages
@@ -31,29 +33,62 @@ type UI struct {
 	ExOutput  *tview.TextView
 }
 
+func (ui *UI) setMode(m mode) {
+	ui.Mode = m
+	switch ui.Mode {
+	case modeNormal:
+		ui.App.SetFocus(ui.TopFlex)
+		ui.ExInput.SetText("")
+	case modeEx:
+		ui.App.SetFocus(ui.ExInput)
+	}
+}
+
 func (ui *UI) handleInput(event *tcell.EventKey) *tcell.EventKey {
 	switch ui.Mode {
-	case NormalMode:
-	case ExMode:
-	case FocusedMode:
-	case SearchMode:
+	case modeNormal:
+		switch event.Rune() {
+		case ':':
+			ui.setMode(modeEx)
+			return nil
+		}
+	case modeEx:
+	case modeFocus:
+	case modeSearch:
 	default:
 		panic("mode?")
 	}
 	return event
 }
 
-type Field struct {
+func (ui *UI) handleExInput(key tcell.Key) {
+	text := ui.ExInput.GetText()
+	ui.setMode(modeNormal)
+
+	if key != tcell.KeyEnter {
+		return
+	}
+
+	switch text {
+	case "q", "quit":
+		ui.quit()
+	}
+
+	ui.ExOutput.SetText("")
+	fmt.Fprintf(ui.ExOutput, "did not understand '%s', sorry", text)
+}
+
+type field struct {
 	Name     string
 	Selected bool
 }
 
-func newUI() *UI {
+func NewUI() *UI {
 	app := tview.NewApplication()
 	ui := UI{
-		Mode:      NormalMode,
+		Mode:      modeNormal,
 		App:       app,
-		Fields:    []Field{{"scratch", true}, {"test", false}},
+		Fields:    []field{{"scratch", true}, {"test", false}},
 		Pages:     tview.NewPages(),
 		TopFlex:   tview.NewFlex(),
 		Field:     tview.NewBox(),
@@ -68,18 +103,25 @@ func newUI() *UI {
 	ui.TopFlex.SetDirection(tview.FlexRow)
 	ui.TopFlex.AddItem(ui.Field, 0, 20, true)
 	ui.TopFlex.AddItem(ui.FieldBar, 0, 1, false)
-	ui.TopFlex.AddItem(ui.BottomBar, 1, -1, false)
+	ui.TopFlex.AddItem(ui.BottomBar, 0, 1, false)
 
 	ui.Pages.AddPage("main", ui.TopFlex, true, true)
 
 	ui.BottomBar.AddPage("output", ui.ExOutput, true, true)
-	ui.BottomBar.AddPage("input", ui.ExInput, false, false)
+	ui.BottomBar.AddPage("input", ui.ExInput, true, false)
 
-	fmt.Fprintln(ui.ExOutput, "porphyry has started. :q to quit")
+	ui.ExInput.SetLabel(":")
+	ui.ExInput.SetDoneFunc(ui.handleExInput)
+
+	ui.ExOutput.SetMaxLines(1)
+	fmt.Fprintf(ui.ExOutput, "porphyry has started. :q to quit")
 
 	ui.FieldBar.SetDirection(tview.FlexColumn)
+
 	app.SetBeforeDrawFunc(func(_ tcell.Screen) bool {
+		// Handle field bar
 		ui.FieldBar.Clear()
+
 		for _, f := range ui.Fields {
 			t := tview.NewTextView().SetTextStyle(tcell.StyleDefault.Bold(f.Selected))
 			t.SetMaxLines(1)
@@ -87,6 +129,14 @@ func newUI() *UI {
 			fmt.Fprintf(t, f.Name)
 			ui.FieldBar.AddItem(t, 0, 1, false)
 		}
+
+		// Handle ex mode prompt
+
+		if ui.Mode == modeEx {
+			ui.BottomBar.SwitchToPage("input")
+		} else {
+			ui.BottomBar.SwitchToPage("output")
+		}
 		return false
 	})
 
@@ -94,11 +144,15 @@ func newUI() *UI {
 	return &ui
 }
 
+func (ui *UI) quit() {
+	ui.App.Stop()
+}
+
 func _main() error {
 	cmd := &cobra.Command{
 		Use: "porphyry",
 		RunE: func(cmd *cobra.Command, args []string) error {
-			return newUI().App.Run()
+			return NewUI().App.Run()
 		},
 	}