[#1223] lens/tui: Add search history

Signed-off-by: Aleksey Savchuk <a.savchuk@yadro.com>

cmd/frostfs-lens/internal/tuiutil/help-pages/searching.txt

@@ -1,16 +1,18 @@
 [green::b]Searching[white::-]
 
 	[yellow::b]/[white::-]
-		Initiate a search prompt. Prompt syntax: [yellow::b]<tag>:<args>[white::-]. Leading and trailing white spaces are ignored. See [green::b]Available Search Filters[white::-] section for available filter tags.
+		Initiate the search prompt. The prompt follows this syntax: [yellow::b]<tag>:<args>[white::-]. Any leading and trailing whitespace will be ignored. Refer to the [green::b]Available Search Filters[white::-] section below for a list of valid filter tags.
 
 	[yellow::b]Enter[white::-]
-		Execute the search based on the entered prompt. An error message will display if the prompt is invalid.
+		Execute the search based on the entered prompt. If the prompt is invalid, an error message will be displayed.
 
 	[yellow::b]Escape[white::-]
-		Exit the search prompt.
+		Exit the search prompt without performing a search.
 
+	[yellow::b]Down Arrow[white::-], [yellow::b]Up Arrow[white::-]
+		Navigate through the search history.
 
 [green::b]Available Search Filters[white::-]
 
 %s
-	If you want to define a new filter, see [green::b]Development[white::-] section.
+	To define a new filter, please refer to the [green::b]Development[white::-] section.

cmd/frostfs-lens/internal/tuiutil/input.go

@@ -0,0 +1,79 @@
+package tuiutil
+
+import (
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+type InputFieldWithHistory struct {
+	*tview.InputField
+	history        []string
+	historyLimit   int
+	historyPointer int
+	currentContent string
+}
+
+func NewInputFieldWithHistory(historyLimit int) *InputFieldWithHistory {
+	return &InputFieldWithHistory{
+		InputField:   tview.NewInputField(),
+		historyLimit: historyLimit,
+	}
+}
+
+func (f *InputFieldWithHistory) AddToHistory(s string) *InputFieldWithHistory {
+	defer func() { f.historyPointer = len(f.history) }()
+
+	// Used history for search prompt
+	if f.historyPointer != len(f.history) && s == f.history[f.historyPointer] {
+		f.history = append(f.history[:f.historyPointer], f.history[f.historyPointer+1:]...)
+		f.history = append(f.history, s)
+		return f
+	}
+
+	if len(f.history) == f.historyLimit {
+		f.history = f.history[1:]
+	}
+	f.history = append(f.history, s)
+	return f
+}
+
+func (f *InputFieldWithHistory) InputHandler() func(event *tcell.EventKey, setFocus func(p tview.Primitive)) {
+	return f.WrapInputHandler(func(event *tcell.EventKey, _ func(tview.Primitive)) {
+		switch event.Key() {
+		case tcell.KeyDown:
+			// Must start iterating before
+			if f.historyPointer == len(f.history) {
+				return
+			}
+			// Stop iterating over history.
+			if f.historyPointer == len(f.history)-1 {
+				f.historyPointer++
+				f.InputField.SetText(f.currentContent)
+				return
+			}
+			// Iterate back.
+			f.historyPointer++
+			f.InputField.SetText(f.history[f.historyPointer])
+		case tcell.KeyUp:
+			if len(f.history) == 0 {
+				return
+			}
+			// Start iterating over history.
+			if f.historyPointer == len(f.history) {
+				f.historyPointer--
+				f.currentContent = f.InputField.GetText()
+				f.InputField.SetText(f.history[f.historyPointer])
+				return
+			}
+			// End of history.
+			if f.historyPointer == 0 {
+				return
+			}
+			// Iterate forth.
+			f.historyPointer--
+			f.InputField.SetText(f.history[f.historyPointer])
+		default:
+			f.InputField.InputHandler()(event, func(tview.Primitive) {})
+		}
+	})
+}

cmd/frostfs-lens/internal/tuiutil/ui.go

@@ -45,7 +45,7 @@ type UI struct {
 	pageStub tview.Primitive
 
 	infoBar    *tview.TextView
-	searchBar  *tview.InputField
+	searchBar  *InputFieldWithHistory
 	loadingBar *LoadingBar
 	helpBar    *tview.TextView
 
@@ -79,7 +79,7 @@ func NewUI(ctx context.Context, app *tview.Application, db *bbolt.DB) *UI {
 		isFirstMount:     true,
 		infoBar:          tview.NewTextView(),
 		pageStub:         tview.NewBox(),
-		searchBar:        tview.NewInputField(),
+		searchBar:        NewInputFieldWithHistory(100),
 		filterHints:      make(map[string]string),
 		helpBar:          tview.NewTextView(),
 		searchErrorBar:   tview.NewTextView(),
@@ -111,6 +111,7 @@ func NewUI(ctx context.Context, app *tview.Application, db *bbolt.DB) *UI {
 	ui.pageToMount = NewBucketsView(ui, NewFilter(nil))
 
 	ui.searchBar.SetLabel("/")
+
 	ui.infoBar.SetText(fmt.Sprintf(" %s (press h for help, / to search or q to quit) ", db.Path()))
 
 	return ui
@@ -442,8 +443,12 @@ func (ui *UI) handleInputOnSearching(event *tcell.EventKey) {
 			ui.moveNextPage(NewRecordsView(ui, bucket, res))
 		}
 
+		if ui.searchBar.GetText() != "" {
+			ui.searchBar.AddToHistory(ui.searchBar.GetText())
+		}
+
+		ui.searchBar.SetText("")
 		ui.isSearching = false
-		// ui.searchBar.SetText("")
 	case k == tcell.KeyEsc:
 		ui.isSearching = false
 		// ui.searchBar.SetText("")