feat: change UI component for disks selector

Implemented a new component based on `tview.Table` that shows all
available block devices as a table.

Had to stop using standard form control, because it doesn't really
handle multiline elements.

Signed-off-by: Artem Chernyshev <artem.0xD2@gmail.com>

internal/pkg/tui/components/form.go

@@ -0,0 +1,76 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package components
+
+import (
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+// NewForm creates a new form.
+func NewForm() *Form {
+	return &Form{
+		Flex:      tview.NewFlex().SetDirection(tview.FlexRow),
+		formItems: []tview.FormItem{},
+	}
+}
+
+// Form is a more flexible form component for tview lib.
+type Form struct {
+	*tview.Flex
+	formItems   []tview.FormItem
+	maxLabelLen int
+}
+
+// AddFormItem adds a new item to the form.
+func (f *Form) AddFormItem(item tview.Primitive) {
+	if formItem, ok := item.(tview.FormItem); ok {
+		f.formItems = append(f.formItems, formItem)
+		labelLen := len(formItem.GetLabel()) + 1
+
+		if labelLen > f.maxLabelLen {
+			for _, item := range f.formItems[:len(f.formItems)-1] {
+				item.SetFormAttributes(
+					labelLen,
+					tview.Styles.PrimaryTextColor,
+					f.GetBackgroundColor(),
+					tview.Styles.PrimaryTextColor,
+					tview.Styles.ContrastBackgroundColor,
+				)
+			}
+
+			f.maxLabelLen = labelLen
+		}
+
+		formItem.SetFormAttributes(
+			f.maxLabelLen,
+			tview.Styles.PrimaryTextColor,
+			f.GetBackgroundColor(),
+			tview.Styles.PrimaryTextColor,
+			tview.Styles.ContrastBackgroundColor,
+		)
+	} else if box, ok := item.(Box); ok {
+		box.SetBackgroundColor(f.GetBackgroundColor())
+	}
+
+	height := 1
+	multiline, ok := item.(Multiline)
+
+	if ok {
+		height = multiline.GetHeight()
+	}
+
+	f.AddItem(item, height+1, 1, false)
+}
+
+// Multiline interface represents elements that can occupy more than one line.
+type Multiline interface {
+	GetHeight() int
+}
+
+// Box interface that has just SetBackgroundColor.
+type Box interface {
+	SetBackgroundColor(tcell.Color) *tview.Box
+}

internal/pkg/tui/components/formlabel.go

@@ -5,7 +5,6 @@
 package components
 
 import (
-	"github.com/gdamore/tcell/v2"
 	"github.com/rivo/tview"
 )
 
@@ -15,8 +14,6 @@ func NewFormLabel(label string) *FormLabel {
 		tview.NewTextView().SetText(label),
 	}
 
-	res.SetWordWrap(true)
-
 	return res
 }
 
@@ -24,25 +21,3 @@ func NewFormLabel(label string) *FormLabel {
 type FormLabel struct {
 	*tview.TextView
 }
-
-// GetLabel implements FormItem interface.
-func (fl *FormLabel) GetLabel() string {
-	return ""
-}
-
-// SetFormAttributes implements FormItem interface.
-func (fl *FormLabel) SetFormAttributes(labelWidth int, labelColor, bgColor, fieldTextColor, fieldBgColor tcell.Color) tview.FormItem {
-	fl.SetBackgroundColor(bgColor)
-
-	return fl
-}
-
-// GetFieldWidth implements FormItem interface.
-func (fl *FormLabel) GetFieldWidth() int {
-	return 0
-}
-
-// SetFinishedFunc implements FormItem interface.
-func (fl *FormLabel) SetFinishedFunc(handler func(key tcell.Key)) tview.FormItem {
-	return fl
-}

internal/pkg/tui/components/table.go

@@ -0,0 +1,210 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package components
+
+import (
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+var (
+	backgroundColor         = tcell.Color235
+	textNormalColor         = tcell.ColorIvory
+	selectedTextColor       = tview.Styles.PrimaryTextColor
+	selectedBackgroundColor = tview.Styles.ContrastBackgroundColor
+)
+
+// NewTable creates new table.
+func NewTable() *Table {
+	t := &Table{
+		Table:       tview.NewTable(),
+		selectedRow: -1,
+		hoveredRow:  -1,
+		rows:        [][]interface{}{},
+	}
+
+	hasFocus := false
+
+	t.SetDrawFunc(func(screen tcell.Screen, x, y, width, height int) (int, int, int, int) {
+		changed := hasFocus != t.HasFocus()
+		if !changed {
+			return x, y, width, height
+		}
+
+		hasFocus = t.HasFocus()
+
+		if hasFocus {
+			if t.selectedRow != -1 {
+				t.HoverRow(t.selectedRow)
+			} else {
+				t.HoverRow(1)
+			}
+		} else {
+			t.HoverRow(-1)
+		}
+
+		return x, y, width, height
+	})
+
+	t.SetInputCapture(func(e *tcell.EventKey) *tcell.EventKey {
+		// nolint:exhaustive
+		switch e.Key() {
+		case tcell.KeyUp:
+			if t.hoveredRow > 0 {
+				t.HoverRow(t.hoveredRow - 1)
+			}
+		case tcell.KeyDown:
+			if t.hoveredRow < t.GetRowCount() {
+				t.HoverRow(t.hoveredRow + 1)
+			}
+		case tcell.KeyEnter:
+			if t.hoveredRow != -1 {
+				t.SelectRow(t.hoveredRow)
+			}
+		}
+
+		return e
+	})
+
+	return t
+}
+
+// Table list of choices represented in table format.
+type Table struct {
+	*tview.Table
+	selectedRow   int
+	hoveredRow    int
+	onRowSelected func(row int)
+	rows          [][]interface{}
+}
+
+// SetHeader sets table header.
+func (t *Table) SetHeader(keys ...interface{}) {
+	t.AddRow(keys...)
+}
+
+// AddRow adds a new row to the table.
+func (t *Table) AddRow(columns ...interface{}) {
+	row := t.GetRowCount()
+	col := backgroundColor
+	textColor := tview.Styles.PrimaryTextColor
+
+	if row == 0 {
+		col = tcell.ColorSilver
+		textColor = tview.Styles.InverseTextColor
+	} else {
+		t.rows = append(t.rows, columns)
+	}
+
+	cell := tview.NewTableCell(" ").
+		SetAlign(tview.AlignCenter).
+		SetBackgroundColor(col).
+		SetTextColor(textColor)
+
+	if row > 0 {
+		cell.SetClickedFunc(func() bool {
+			t.HoverRow(row)
+			t.SelectRow(row)
+
+			return true
+		})
+	}
+
+	t.SetCell(row, 0, cell)
+
+	for i, text := range columns {
+		cell = tview.NewTableCell(text.(string))
+		cell.SetExpansion(1)
+		cell.SetTextColor(textColor)
+
+		if i == len(columns)-1 {
+			cell.SetAlign(tview.AlignRight)
+		}
+
+		cell.SetBackgroundColor(col)
+		cell.SetSelectable(true)
+		t.SetCell(row, i+1, cell)
+
+		if row > 0 {
+			cell.SetClickedFunc(func() bool {
+				return t.HoverRow(row)
+			})
+		}
+	}
+}
+
+// SelectRow selects the row in the table.
+func (t *Table) SelectRow(row int) bool {
+	// don't select the header
+	if row < 2 {
+		row = 1
+	}
+
+	if row < t.GetRowCount() {
+		if t.selectedRow != -1 {
+			t.GetCell(t.selectedRow, 0).SetText(" ")
+		}
+
+		t.GetCell(row, 0).SetText("►")
+		t.selectedRow = row
+
+		if t.onRowSelected != nil {
+			t.onRowSelected(row)
+		}
+
+		return true
+	}
+
+	return false
+}
+
+// HoverRow highlights the row in the table.
+func (t *Table) HoverRow(row int) bool {
+	updateRowStyle := func(r int, foregroundColor, backgroundColor tcell.Color) {
+		for i := 0; i < t.GetColumnCount(); i++ {
+			t.GetCell(r, i).SetBackgroundColor(backgroundColor).SetTextColor(foregroundColor)
+		}
+	}
+
+	// don't select the header
+	if row == 0 {
+		row = 1
+	}
+
+	if row < t.GetRowCount() {
+		if t.hoveredRow != -1 {
+			updateRowStyle(t.hoveredRow, textNormalColor, backgroundColor)
+		}
+
+		if row != -1 {
+			updateRowStyle(row, selectedTextColor, selectedBackgroundColor)
+		}
+
+		t.hoveredRow = row
+
+		return true
+	}
+
+	return false
+}
+
+// GetHeight implements Multiline interface.
+func (t *Table) GetHeight() int {
+	return t.GetRowCount()
+}
+
+// SetRowSelectedFunc called when selected row is updated.
+func (t *Table) SetRowSelectedFunc(callback func(row int)) {
+	t.onRowSelected = callback
+}
+
+// GetValue returns value in row/column.
+func (t *Table) GetValue(row, column int) interface{} {
+	if row < len(t.rows) && column < len(t.rows[row]) {
+		return t.rows[row][column]
+	}
+
+	return ""
+}

internal/pkg/tui/installer/installer.go

@@ -45,6 +45,14 @@ type Item struct {
 	options     []interface{}
 }
 
+// TableHeaders represents table headers list for item options which are using table representation.
+type TableHeaders []interface{}
+
+// NewTableHeaders creates TableHeaders object.
+func NewTableHeaders(headers ...interface{}) TableHeaders {
+	return TableHeaders(headers)
+}
+
 // NewItem creates new form item.
 func NewItem(name, description string, dest interface{}, options ...interface{}) *Item {
 	return &Item{
@@ -62,8 +70,8 @@ func (item *Item) assign(value string) error {
 
 // createFormItems dynamically creates tview.FormItem list based on the wrapped type.
 // nolint:gocyclo
-func (item *Item) createFormItems() ([]tview.FormItem, error) {
-	res := []tview.FormItem{}
+func (item *Item) createFormItems() ([]tview.Primitive, error) {
+	res := []tview.Primitive{}
 
 	v := reflect.ValueOf(item.dest)
 	if v.Kind() == reflect.Ptr {
@@ -77,7 +85,7 @@ func (item *Item) createFormItems() ([]tview.FormItem, error) {
 		}
 	}
 
-	var formItem tview.FormItem
+	var formItem tview.Primitive
 
 	// nolint:exhaustive
 	switch v.Kind() {
@@ -92,37 +100,69 @@ func (item *Item) createFormItems() ([]tview.FormItem, error) {
 		formItem = checkbox
 	default:
 		if len(item.options) > 0 {
-			dropdown := tview.NewDropDown()
+			tableHeaders, ok := item.options[0].(TableHeaders)
+			if ok {
+				table := components.NewTable()
+				table.SetHeader(tableHeaders...)
 
-			if len(item.options)%2 != 0 {
-				return nil, fmt.Errorf("wrong amount of arguments for options: should be even amount of key, value pairs")
-			}
+				data := item.options[1:]
+				numColumns := len(tableHeaders)
 
-			for i := 0; i < len(item.options); i += 2 {
-				if optionName, ok := item.options[i].(string); ok {
-					selected := -1
-
-					func(index int) {
-						dropdown.AddOption(optionName, func() {
-							v.Set(reflect.ValueOf(item.options[index]))
-						})
-
-						if v.Interface() == item.options[index] {
-							selected = i / 2
-						}
-					}(i + 1)
-
-					if selected != -1 {
-						dropdown.SetCurrentOption(selected)
-					}
-				} else {
-					return nil, fmt.Errorf("expected string option name, got %s", item.options[i])
+				if len(data)%numColumns != 0 {
+					return nil, fmt.Errorf("incorrect amount of data provided for the table")
 				}
+
+				selected := -1
+
+				for i := 0; i < len(data); i += numColumns {
+					table.AddRow(data[i : i+numColumns]...)
+
+					if v.Interface() == data[i] {
+						selected = i / numColumns
+					}
+				}
+
+				if selected != -1 {
+					table.SelectRow(selected)
+				}
+
+				formItem = table
+				table.SetRowSelectedFunc(func(row int) {
+					v.Set(reflect.ValueOf(table.GetValue(row, 0))) // always pick the first column
+				})
+			} else {
+				dropdown := tview.NewDropDown()
+
+				if len(item.options)%2 != 0 {
+					return nil, fmt.Errorf("wrong amount of arguments for options: should be even amount of key, value pairs")
+				}
+
+				for i := 0; i < len(item.options); i += 2 {
+					if optionName, ok := item.options[i].(string); ok {
+						selected := -1
+
+						func(index int) {
+							dropdown.AddOption(optionName, func() {
+								v.Set(reflect.ValueOf(item.options[index]))
+							})
+
+							if v.Interface() == item.options[index] {
+								selected = i / 2
+							}
+						}(i + 1)
+
+						if selected != -1 {
+							dropdown.SetCurrentOption(selected)
+						}
+					} else {
+						return nil, fmt.Errorf("expected string option name, got %s", item.options[i])
+					}
+				}
+
+				dropdown.SetLabel(item.name)
+
+				formItem = dropdown
 			}
-
-			dropdown.SetLabel(item.name)
-
-			formItem = dropdown
 		} else {
 			input := tview.NewInputField()
 			formItem = input
@@ -375,7 +415,8 @@ func (installer *Installer) configure() error {
 		groups = append(groups, eg)
 
 		err = func(index int) error {
-			form := tview.NewForm()
+			form := components.NewForm()
+			form.SetBackgroundColor(color)
 
 			for _, item := range p.items {
 				formItems, e := item.createFormItems()

internal/pkg/tui/installer/state.go

@@ -46,7 +46,9 @@ func NewState(ctx context.Context, conn *Connection) (*State, error) {
 		opts.ClusterConfig.ControlPlane.Endpoint = fmt.Sprintf("https://%s:%d", conn.nodeEndpoint, constants.DefaultControlPlanePort)
 	}
 
-	diskInstallOptions := []interface{}{}
+	diskInstallOptions := []interface{}{
+		NewTableHeaders("device name", "model name", "size"),
+	}
 
 	disks, err := conn.Disks()
 	if err != nil {
@@ -58,8 +60,7 @@ func NewState(ctx context.Context, conn *Connection) (*State, error) {
 			opts.MachineConfig.InstallConfig.InstallDisk = disk.DeviceName
 		}
 
-		name := fmt.Sprintf("%s  %s  %s", disk.DeviceName, disk.Model, humanize.Bytes(disk.Size))
-		diskInstallOptions = append(diskInstallOptions, name, disk.DeviceName)
+		diskInstallOptions = append(diskInstallOptions, disk.DeviceName, disk.Model, humanize.Bytes(disk.Size))
 	}
 
 	var machineTypes []interface{}
@@ -80,7 +81,26 @@ func NewState(ctx context.Context, conn *Connection) (*State, error) {
 		conn: conn,
 		opts: opts,
 		pages: []*Page{
+			NewPage("Installer Params",
+				NewItem(
+					"image",
+					v1alpha1.InstallConfigDoc.Describe("image", true),
+					&opts.MachineConfig.InstallConfig.InstallImage,
+				),
+				NewItem(
+					"install disk",
+					v1alpha1.InstallConfigDoc.Describe("disk", true),
+					&opts.MachineConfig.InstallConfig.InstallDisk,
+					diskInstallOptions...,
+				),
+			),
 			NewPage("Machine Config",
+				NewItem(
+					"machine type",
+					v1alpha1.MachineConfigDoc.Describe("type", true),
+					&opts.MachineConfig.Type,
+					machineTypes...,
+				),
 				NewItem(
 					"cluster name",
 					v1alpha1.ClusterConfigDoc.Describe("clusterName", true),
@@ -91,28 +111,11 @@ func NewState(ctx context.Context, conn *Connection) (*State, error) {
 					v1alpha1.ControlPlaneConfigDoc.Describe("endpoint", true),
 					&opts.ClusterConfig.ControlPlane.Endpoint,
 				),
-				NewItem(
-					"machine type",
-					v1alpha1.MachineConfigDoc.Describe("type", true),
-					&opts.MachineConfig.Type,
-					machineTypes...,
-				),
 				NewItem(
 					"kubernetes version",
 					"Kubernetes version to install.",
 					&opts.MachineConfig.KubernetesVersion,
 				),
-				NewItem(
-					"install disk",
-					v1alpha1.InstallConfigDoc.Describe("disk", true),
-					&opts.MachineConfig.InstallConfig.InstallDisk,
-					diskInstallOptions...,
-				),
-				NewItem(
-					"image",
-					v1alpha1.InstallConfigDoc.Describe("image", true),
-					&opts.MachineConfig.InstallConfig.InstallImage,
-				),
 			),
 			NewPage("Network Config",
 				NewItem(