Merge pull request #27 from rkfg/pagination

Add better list navigation

ui/controller.go

@@ -56,6 +56,38 @@ func (c *controller) cursorLeft(g *gocui.Gui, v *gocui.View) error {
 	return nil
 }
 
+func (c *controller) cursorHome(g *gocui.Gui, v *gocui.View) error {
+	view := c.views.Get(v)
+	if view != nil {
+		return cursor.Home(view)
+	}
+	return nil
+}
+
+func (c *controller) cursorEnd(g *gocui.Gui, v *gocui.View) error {
+	view := c.views.Get(v)
+	if view != nil {
+		return cursor.End(view)
+	}
+	return nil
+}
+
+func (c *controller) cursorPageDown(g *gocui.Gui, v *gocui.View) error {
+	view := c.views.Get(v)
+	if view != nil {
+		return cursor.PageDown(view)
+	}
+	return nil
+}
+
+func (c *controller) cursorPageUp(g *gocui.Gui, v *gocui.View) error {
+	view := c.views.Get(v)
+	if view != nil {
+		return cursor.PageUp(view)
+	}
+	return nil
+}
+
 func (c *controller) SetModels(ctx context.Context) error {
 	err := c.models.RefreshInfo(ctx)
 	if err != nil {

ui/cursor/cursor.go

@@ -3,7 +3,8 @@ package cursor
 type View interface {
 	Cursor() (int, int)
 	Origin() (int, int)
-	Speed() (int, int, int, int)
+	Speed() (right int, left int, down int, up int)
+	Limits() (pageSize int, fullSize int)
 	SetCursor(int, int) error
 	SetOrigin(int, int) error
 }
@@ -82,3 +83,80 @@ func Left(v View) error {
 	}
 	return nil
 }
+
+func Home(v View) error {
+	if v == nil {
+		return nil
+	}
+	ox, _ := v.Origin()
+	cx, _ := v.Cursor()
+	v.SetCursor(cx, 0)
+	v.SetOrigin(ox, 0)
+	return nil
+}
+
+func End(v View) error {
+	if v == nil {
+		return nil
+	}
+	ps, fs := v.Limits()
+	if ps == 0 { // no pagination
+		return nil
+	}
+	if ps > fs {
+		ps = fs
+	}
+	ox, _ := v.Origin()
+	cx, _ := v.Cursor()
+	v.SetCursor(cx, ps-1)
+	v.SetOrigin(ox, fs-ps)
+	return nil
+}
+
+func PageDown(v View) error {
+	if v == nil {
+		return nil
+	}
+	ps, fs := v.Limits()
+	if ps == 0 { // no pagination
+		return nil
+	}
+	if ps > fs {
+		ps = fs
+	}
+	ox, oy := v.Origin()
+	cx, cy := v.Cursor()
+	ny := oy + cy + ps
+	if ny >= fs {
+		ny = fs - 1
+	}
+	if ny >= fs-ps {
+		v.SetOrigin(ox, fs-ps)
+		v.SetCursor(cx, ny-fs+ps)
+	} else {
+		v.SetOrigin(ox, ny-ps)
+		v.SetCursor(cx, ps-1)
+	}
+	return nil
+}
+
+func PageUp(v View) error {
+	if v == nil {
+		return nil
+	}
+	ox, oy := v.Origin()
+	cx, cy := v.Cursor()
+	ps, _ := v.Limits()
+	ny := oy + cy - ps
+	if ny <= 0 {
+		ny = 0
+	}
+	if ny <= ps {
+		v.SetOrigin(ox, 0)
+		v.SetCursor(cx, ny)
+	} else {
+		v.SetOrigin(ox, ny)
+		v.SetCursor(cx, 0)
+	}
+	return nil
+}

ui/keybindings.go

@@ -45,6 +45,26 @@ func setKeyBinding(c *controller, g *gocui.Gui) error {
 		return err
 	}
 
+	err = g.SetKeybinding("", gocui.KeyHome, gocui.ModNone, c.cursorHome)
+	if err != nil {
+		return err
+	}
+
+	err = g.SetKeybinding("", gocui.KeyEnd, gocui.ModNone, c.cursorEnd)
+	if err != nil {
+		return err
+	}
+
+	err = g.SetKeybinding("", gocui.KeyPgdn, gocui.ModNone, c.cursorPageDown)
+	if err != nil {
+		return err
+	}
+
+	err = g.SetKeybinding("", gocui.KeyPgup, gocui.ModNone, c.cursorPageUp)
+	if err != nil {
+		return err
+	}
+
 	err = g.SetKeybinding("", gocui.KeyEnter, gocui.ModNone, c.OnEnter)
 	if err != nil {
 		return err

ui/views/channel.go

@@ -47,6 +47,10 @@ func (c Channel) Speed() (int, int, int, int) {
 	return 1, 1, 1, 1
 }
 
+func (c Channel) Limits() (pageSize int, fullSize int) {
+	return 0, 0
+}
+
 func (c *Channel) SetCursor(x, y int) error {
 	return c.view.SetCursor(x, y)
 }
@@ -149,7 +153,7 @@ func (c *Channel) display() {
 
 	if channel.Policy1 != nil {
 		fmt.Fprintln(v, "")
-		fmt.Fprintln(v, green(" [ Forward Policy Node1 ]"))
+		fmt.Fprintln(v, green(" [ Forward Policy Node 1 ]"))
 		if channel.Policy1.Disabled {
 			fmt.Fprintln(v, red("disabled"))
 		}

ui/views/channels.go

@@ -156,6 +156,12 @@ func (c *Channels) Speed() (int, int, int, int) {
 		down, up
 }
 
+func (c *Channels) Limits() (pageSize int, fullSize int) {
+	_, pageSize = c.view.Size()
+	fullSize = c.channels.Len()
+	return
+}
+
 func (c Channels) Index() int {
 	_, oy := c.Origin()
 	_, cy := c.Cursor()

ui/views/help.go

@@ -42,6 +42,10 @@ func (h Help) Speed() (int, int, int, int) {
 	return 1, 1, 1, 1
 }
 
+func (h Help) Limits() (pageSize int, fullSize int) {
+	return 0, 0
+}
+
 func (h *Help) SetCursor(x, y int) error {
 	return h.view.SetCursor(x, y)
 }

ui/views/menu.go

@@ -50,6 +50,12 @@ func (h Menu) Speed() (int, int, int, int) {
 	return 0, 0, down, 1
 }
 
+func (h Menu) Limits() (pageSize int, fullSize int) {
+	pageSize = len(menu)
+	fullSize = len(menu)
+	return
+}
+
 func (h *Menu) SetCursor(x, y int) error {
 	err := h.view.SetCursor(x, y)
 	if err != nil {

ui/views/routing.go

@@ -134,6 +134,12 @@ func (c *Routing) Speed() (int, int, int, int) {
 		down, up
 }
 
+func (c *Routing) Limits() (pageSize int, fullSize int) {
+	_, pageSize = c.view.Size()
+	fullSize = len(c.routingEvents.Log)
+	return
+}
+
 func (c Routing) Index() int {
 	_, oy := c.Origin()
 	_, cy := c.Cursor()

ui/views/transaction.go

@@ -47,6 +47,10 @@ func (c Transaction) Speed() (int, int, int, int) {
 	return 1, 1, 1, 1
 }
 
+func (c Transaction) Limits() (pageSize int, fullSize int) {
+	return 0, 0
+}
+
 func (c *Transaction) SetCursor(x, y int) error {
 	return c.view.SetCursor(x, y)
 }

ui/views/transactions.go

@@ -136,6 +136,12 @@ func (c *Transactions) Speed() (int, int, int, int) {
 		down, up
 }
 
+func (c *Transactions) Limits() (pageSize int, fullSize int) {
+	_, pageSize = c.view.Size()
+	fullSize = c.transactions.Len()
+	return
+}
+
 func (c *Transactions) Sort(column string, order models.Order) {
 	if column == "" {
 		index := c.currentColumnIndex()