implement moving of cursor with arrow keys

Signed-off-by: Jakub Sokołowski <jakub@status.im>

json.go

@@ -32,9 +32,7 @@ func (p Peer) AsTable(maxWidth int) string {
 
 // the ID is too long to display in full in most places
 func (id peerId) String() string {
-	return fmt.Sprintf("%s...%s",
-		string(id[:6]),
-		string(id[len(id)-6:]))
+	return fmt.Sprintf("%s...%s", string(id[:6]), string(id[len(id)-6:]))
 }
 
 type NetworkInfo struct {

keys.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"github.com/jroimartin/gocui"
 )
 
@@ -13,8 +12,8 @@ type Binding struct {
 
 var bindings = [...]Binding{
 	Binding{gocui.KeyCtrlC, gocui.ModNone, quit},
-	Binding{gocui.KeyArrowUp, gocui.ModNone, HandlerCursorUp},
-	Binding{gocui.KeyArrowDown, gocui.ModNone, HandlerCursorDown},
+	Binding{gocui.KeyArrowUp, gocui.ModNone, HandlerCursorDispenser(-1)},
+	Binding{gocui.KeyArrowDown, gocui.ModNone, HandlerCursorDispenser(1)},
 }
 
 func keybindings(g *gocui.Gui) error {
@@ -26,20 +25,25 @@ func keybindings(g *gocui.Gui) error {
 	return nil
 }
 
-func HandlerCursorUp(g *gocui.Gui, v *gocui.View) error {
-	fmt.Println("UP")
-	return nil
-}
-
-func HandlerCursorDown(g *gocui.Gui, v *gocui.View) error {
-	if v != nil {
+func HandlerCursorDispenser(mod int) func(g *gocui.Gui, v *gocui.View) error {
+	return func(g *gocui.Gui, v *gocui.View) error {
+		if v == nil {
+			return nil
+		}
+		mx, _ := v.Size()
 		cx, cy := v.Cursor()
-		if err := v.SetCursor(cx, cy+1); err != nil {
+		if cy == 0 || cx == mx {
+			return nil
+		}
+		if err := v.SetCursor(cx, cy+mod); err != nil {
+			if mod == -1 {
+				return nil
+			}
 			ox, oy := v.Origin()
-			if err := v.SetOrigin(ox, oy+1); err != nil {
+			if err := v.SetOrigin(ox, oy+mod); err != nil {
 				return err
 			}
 		}
+		return nil
 	}
-	return nil
 }

main.go

@@ -2,10 +2,8 @@ package main
 
 import (
 	"fmt"
-	"log"
-	"time"
-	//"github.com/kr/pretty"
 	"github.com/jroimartin/gocui"
+	"log"
 )
 
 type rcpResp map[string]interface{}
@@ -23,6 +21,7 @@ func main() {
 	}
 	defer g.Close()
 
+	g.SelFgColor = gocui.ColorGreen
 	g.Highlight = true
 	g.Cursor = true
 
@@ -39,51 +38,25 @@ func main() {
 	}
 
 	// Start RPC calling routine
-	go fetchPeers(c, g)
+	go FetchPeers(c, g)
 
 	if err := g.MainLoop(); err != nil && err != gocui.ErrQuit {
 		log.Panicln(err)
 	}
 }
 
-func fetchPeers(c *client, g *gocui.Gui) {
-	for {
-		select {
-		case <-threadDone:
-			return
-		case <-time.After(interval * time.Second):
-			peers, err := c.getPeers()
-			if err != nil {
-				log.Panicln(err)
-			}
-			writePeers(g, peers)
-		}
-	}
-}
-
-func writePeers(g *gocui.Gui, peers []Peer) {
-	g.Update(func(g *gocui.Gui) error {
-		v, err := g.View("main")
-		if err != nil {
-			return err
-		}
-		v.Clear()
-		maxWidth, _ := g.Size()
-		for _, peer := range peers {
-			fmt.Fprintf(v, "%s\n", peer.AsTable(maxWidth))
-		}
-		return nil
-	})
-}
-
 func layout(g *gocui.Gui) error {
 	maxX, maxY := g.Size()
 	if v, err := g.SetView("main", 0, 0, maxX-1, maxY-1); err != nil {
 		if err != gocui.ErrUnknownView {
 			return err
 		}
+		v.SelFgColor = gocui.ColorBlack
+		v.SelBgColor = gocui.ColorGreen
+		v.Title = "Peers"
 		v.Highlight = true
-		v.SetCursor(0, 0)
+		v.SetCursor(0, 1)
+		g.SetCurrentView("main")
 		fmt.Fprintln(v, "Loading peers...")
 	}
 	return nil

peers.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"fmt"
+	"github.com/jroimartin/gocui"
+	"log"
+	"time"
+)
+
+func FetchPeers(c *client, g *gocui.Gui) {
+	for {
+		select {
+		case <-threadDone:
+			return
+		default:
+			peers, err := c.getPeers()
+			if err != nil {
+				log.Panicln(err)
+			}
+			WritePeers(g, peers)
+		}
+		<-time.After(interval * time.Second)
+	}
+}
+
+func WritePeers(g *gocui.Gui, peers []Peer) {
+	g.Update(func(g *gocui.Gui) error {
+		v, err := g.View("main")
+		if err != nil {
+			return err
+		}
+		v.Clear()
+		maxWidth, _ := g.Size()
+		fmt.Fprintf(v, "%-15s | %-40s | %s\n", "Peer ID", "Name", "Protocols")
+		for _, peer := range peers {
+			fmt.Fprintf(v, "%s\n", peer.AsTable(maxWidth))
+		}
+		return nil
+	})
+}