help menu auto layout

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Former-commit-id: b5c379d08eb1d808b3277ae5500ffe92d291272b
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Former-commit-id: 7fdbe0600a18c2904c1e14f00ed11797f9f5fb1c

cointop/help.go

@@ -2,7 +2,9 @@ package cointop
 
 import (
 	"fmt"
+	"sort"
 
+	"github.com/miguelmota/cointop/pkg/color"
 	"github.com/miguelmota/cointop/pkg/pad"
 )
 
@@ -15,22 +17,46 @@ func (ct *Cointop) toggleHelp() error {
 }
 
 func (ct *Cointop) updateHelp() {
-	str := fmt.Sprintf(" Help %s\n\n", pad.Left("[c]lose", ct.maxtablewidth-11, " "))
-	i := 0
-	for k, v := range ct.shortcutkeys {
-		nl := " "
-		i = i + 1
-		if i%3 == 0 {
-			i = 0
-			nl = "\n"
+	keys := make([]string, 0, len(ct.shortcutkeys))
+	for k := range ct.shortcutkeys {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+
+	header := color.GreenBg(fmt.Sprintf(" Help %s\n\n", pad.Left("[q] close help ", ct.maxtablewidth-10, " ")))
+	cnt := 0
+	h := ct.viewHeight("help")
+	percol := h - 3
+	cols := make([][]string, percol)
+	for i := range cols {
+		cols[i] = make([]string, 20)
+	}
+	for _, k := range keys {
+		v := ct.shortcutkeys[k]
+		if cnt%percol == 0 {
+			cnt = 0
 		}
-		str = fmt.Sprintf("%s%10s %-40s%s", str, fmt.Sprintf("[%s]", k), v, nl)
+		item := fmt.Sprintf("%10s %-40s", k, color.Yellow(v))
+		cols[cnt] = append(cols[cnt], item)
+		cnt = cnt + 1
 	}
 
+	var body string
+	for i := 0; i < percol; i++ {
+		var row string
+		for j := 0; j < len(cols[i]); j++ {
+			item := cols[i][j]
+			row = fmt.Sprintf("%s%s", row, item)
+		}
+		body = fmt.Sprintf("%s%s\n", body, row)
+	}
+
+	content := fmt.Sprintf("%s%s", header, body)
+
 	ct.update(func() {
 		ct.helpview.Clear()
 		ct.helpview.Frame = true
-		fmt.Fprintln(ct.helpview, str)
+		fmt.Fprintln(ct.helpview, content)
 	})
 }
 

cointop/layout.go

@@ -80,7 +80,7 @@ func (ct *Cointop) layout(g *gocui.Gui) error {
 		ct.searchfield.FgColor = gocui.ColorWhite
 	}
 
-	if v, err := g.SetView("help", 1, 1, ct.maxtablewidth-2, maxY-2); err != nil {
+	if v, err := g.SetView("help", 1, 1, ct.maxtablewidth-2, maxY-1); err != nil {
 		if err != gocui.ErrUnknownView {
 			return err
 		}

cointop/size.go

@@ -16,3 +16,23 @@ func (ct *Cointop) height() int {
 	_, h := ct.size()
 	return h
 }
+
+// viewWidth returns view width
+func (ct *Cointop) viewWidth(view string) int {
+	v, err := ct.g.View(view)
+	if err != nil {
+		return 0
+	}
+	w, _ := v.Size()
+	return w
+}
+
+// viewHeight returns view height
+func (ct *Cointop) viewHeight(view string) int {
+	v, err := ct.g.View(view)
+	if err != nil {
+		return 0
+	}
+	_, h := v.Size()
+	return h
+}

pkg/color/color.go

@@ -11,6 +11,8 @@ var (
 	WhiteBold = color.New(color.FgWhite, color.Bold).SprintFunc()
 	// Yellow color
 	Yellow = color.New(color.FgYellow).SprintFunc()
+	// YellowBg color
+	YellowBg = color.New(color.BgYellow, color.FgBlack).SprintFunc()
 	// Green color
 	Green = color.New(color.FgGreen).SprintFunc()
 	// GreenBg color