paginator and styles

ui/paginator.go

@@ -0,0 +1,83 @@
+package ui
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/orus-dev/osui"
+	"github.com/orus-dev/osui/styles"
+)
+
+type PaginatorStyle struct {
+	Active string `default:"\033[32m"`
+}
+
+type PaginatorComponent struct {
+	Data        osui.ComponentData
+	Style       *PaginatorStyle
+	Pages       []osui.Component
+	UpdatePages map[int]func(string) bool
+	ActivePage  int
+}
+
+func (p *PaginatorComponent) GetComponentData() *osui.ComponentData {
+	return &p.Data
+}
+
+func (p PaginatorComponent) Render() string {
+	pgs := strings.Repeat(" ", p.Data.Screen.Width/2)
+	for page := range p.Pages {
+		if page == p.ActivePage {
+			pgs += p.Style.Active + "•" + styles.Reset
+		} else {
+			pgs += styles.Reset + "•"
+		}
+	}
+	frame := osui.NewFrame(p.Data.Screen.Width, p.Data.Screen.Height-3)
+	osui.RenderOnFrame(p.Pages[p.ActivePage], &frame)
+	return fmt.Sprintf("%s\n%s", pgs, styles.Reset+strings.Join(frame, "\n"))
+}
+
+func (p *PaginatorComponent) Run() {
+	for _, c := range p.Pages {
+		d := c.GetComponentData()
+		if d.Screen == nil {
+			d.Screen = p.Data.Screen
+		}
+	}
+	for {
+		key, _ := osui.ReadKey()
+		switch key {
+		case "\x1b[Z":
+			if p.ActivePage > 0 {
+				p.ActivePage--
+			} else {
+				p.ActivePage = len(p.Pages) - 1
+			}
+		case osui.Key.Tab:
+			if p.ActivePage < len(p.Pages)-1 {
+				p.ActivePage++
+			} else {
+				p.ActivePage = 0
+			}
+		case osui.Key.Escape:
+			fmt.Print("\n\n")
+			return
+		default:
+			for i, c := range p.UpdatePages {
+				if i == p.ActivePage {
+					c(key)
+				}
+			}
+		}
+		p.Data.Screen.Render()
+	}
+}
+
+func Paginator(pages ...osui.Component) *PaginatorComponent {
+	return &PaginatorComponent{
+		Pages:       pages,
+		Style:       osui.SetDefaults(&PaginatorStyle{}).(*PaginatorStyle),
+		UpdatePages: make(map[int]func(string) bool),
+	}
+}