chore: adjust ToDo to use ScrollableWidget

checklist/checklist.go

@@ -48,9 +48,8 @@ func (list *Checklist) CheckedItems() []*ChecklistItem {
 }
 
 // Delete removes the selected item from the checklist
-func (list *Checklist) Delete() {
+func (list *Checklist) Delete(selectedIndex int) {
-	list.Items = append(list.Items[:list.selected], list.Items[list.selected+1:]...)
+	list.Items = append(list.Items[:selectedIndex], list.Items[selectedIndex+1:]...)
-	list.Prev()
 }
 
 // IsSelectable returns true if the checklist has selectable items, false if it does not
@@ -76,35 +75,14 @@ func (list *Checklist) LongestLine() int {
 	return maxLen
 }
 
-func (list *Checklist) Selected() int {
+// IndexByItem returns the index of a giving item if found ,otherwise returns 0 with ok set to false
-	return list.selected
+func (list *Checklist) IndexByItem(selectableItem *ChecklistItem) (index int, ok bool) {
-}
-
-// SelectedItem returns the currently-selected checklist item or nil if no item is selected
-func (list *Checklist) SelectedItem() *ChecklistItem {
-	if list.IsUnselectable() {
-		return nil
-	}
-
-	return list.Items[list.selected]
-}
-
-func (list *Checklist) SetSelectedByItem(selectableItem *ChecklistItem) {
 	for idx, item := range list.Items {
 		if item == selectableItem {
-			list.selected = idx
+			return idx, true
-			break
 		}
 	}
-}
+	return 0, false
-
-// Toggle switches the checked state of the currently-selected item
-func (list *Checklist) Toggle() {
-	if list.IsUnselectable() {
-		return
-	}
-
-	list.SelectedItem().Toggle()
 }
 
 // UncheckedItems returns a slice of all the unchecked items
@@ -125,65 +103,6 @@ func (list *Checklist) Unselect() {
 	list.selected = -1
 }
 
-// Update sets the text of the currently-selected item to the provided text
-func (list *Checklist) Update(text string) {
-	item := list.SelectedItem()
-
-	if item == nil {
-		return
-	}
-
-	item.Text = text
-}
-
-/* -------------------- Item Movement -------------------- */
-
-// Prev selects the previous item UP in the checklist
-func (list *Checklist) Prev() {
-	list.selected--
-	if list.selected < 0 {
-		list.selected = len(list.Items) - 1
-	}
-}
-
-// Next selects the next item DOWN in the checklist
-func (list *Checklist) Next() {
-	list.selected++
-	if list.selected >= len(list.Items) {
-		list.selected = 0
-	}
-}
-
-// Promote moves the selected item UP in the checklist
-func (list *Checklist) Promote() {
-	if list.IsUnselectable() {
-		return
-	}
-
-	k := list.selected - 1
-	if k < 0 {
-		k = len(list.Items) - 1
-	}
-
-	list.Swap(list.selected, k)
-	list.selected = k
-}
-
-// Demote moves the selected item DOWN in the checklist
-func (list *Checklist) Demote() {
-	if list.IsUnselectable() {
-		return
-	}
-
-	j := list.selected + 1
-	if j >= len(list.Items) {
-		j = 0
-	}
-
-	list.Swap(list.selected, j)
-	list.selected = j
-}
-
 /* -------------------- Sort Interface -------------------- */
 
 func (list *Checklist) Len() int {

modules/todo/display.go

@@ -20,19 +20,22 @@ func (widget *Widget) content() (string, string, bool) {
 	)
 
 	offset := 0
-
+	selectedItem := widget.SelectedItem()
 	for idx, item := range widget.list.UncheckedItems() {
-		str += widget.formattedItemLine(idx, item, widget.list.SelectedItem(), widget.list.LongestLine())
+		str += widget.formattedItemLine(idx, item, selectedItem, widget.list.LongestLine())
 		newList.Items = append(newList.Items, item)
 		offset++
 	}
 
 	for idx, item := range widget.list.CheckedItems() {
-		str += widget.formattedItemLine(idx+offset, item, widget.list.SelectedItem(), widget.list.LongestLine())
+		str += widget.formattedItemLine(idx+offset, item, selectedItem, widget.list.LongestLine())
 		newList.Items = append(newList.Items, item)
 	}
 
-	newList.SetSelectedByItem(widget.list.SelectedItem())
+	if idx, ok := newList.IndexByItem(selectedItem); ok {
+		widget.Selected = idx
+	}
+
 	widget.SetList(newList)
 
 	return widget.CommonSettings().Title, str, false

modules/todo/keyboard.go

@@ -11,62 +11,85 @@ import (
 func (widget *Widget) initializeKeyboardControls() {
 	widget.InitializeCommonControls(widget.Refresh)
 
-	widget.SetKeyboardChar("j", widget.displayNext, "Select next item")
+	widget.SetKeyboardChar("j", widget.Next, "Select next item")
-	widget.SetKeyboardChar("k", widget.displayPrev, "Select previous item")
+	widget.SetKeyboardChar("k", widget.Prev, "Select previous item")
 	widget.SetKeyboardChar(" ", widget.toggleChecked, "Toggle checkmark")
 	widget.SetKeyboardChar("n", widget.newItem, "Create new item")
 	widget.SetKeyboardChar("o", widget.openFile, "Open file")
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.displayNext, "Select next item")
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next, "Select next item")
-	widget.SetKeyboardKey(tcell.KeyUp, widget.displayPrev, "Select previous item")
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev, "Select previous item")
 	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect, "Clear selection")
 	widget.SetKeyboardKey(tcell.KeyCtrlD, widget.deleteSelected, "Delete item")
 	widget.SetKeyboardKey(tcell.KeyCtrlJ, widget.demoteSelected, "Demote item")
 	widget.SetKeyboardKey(tcell.KeyCtrlK, widget.promoteSelected, "Promote item")
-	widget.SetKeyboardKey(tcell.KeyEnter, widget.editSelected, "Edit item")
+	widget.SetKeyboardKey(tcell.KeyEnter, widget.updateSelected, "Edit item")
 
 }
 
 func (widget *Widget) deleteSelected() {
-	widget.list.Delete()
+
+	if !widget.isItemSelected() {
+		return
+	}
+
+	widget.list.Delete(widget.Selected)
+	widget.ScrollableWidget.SetItemCount(len(widget.list.Items))
+	widget.Prev()
 	widget.persist()
 	widget.display()
 }
 
 func (widget *Widget) demoteSelected() {
-	widget.list.Demote()
+	if !widget.isItemSelected() {
+		return
+	}
+
+	j := widget.Selected + 1
+	if j >= len(widget.list.Items) {
+		j = 0
+	}
+
+	widget.list.Swap(widget.Selected, j)
+	widget.Selected = j
+
 	widget.persist()
 	widget.display()
 }
 
-func (widget *Widget) displayNext() {
-	widget.list.Next()
-	widget.display()
-}
-
-func (widget *Widget) displayPrev() {
-	widget.list.Prev()
-	widget.display()
-}
-
 func (widget *Widget) openFile() {
 	confDir, _ := cfg.WtfConfigDir()
 	utils.OpenFile(fmt.Sprintf("%s/%s", confDir, widget.filePath))
 }
 
 func (widget *Widget) promoteSelected() {
-	widget.list.Promote()
+	if !widget.isItemSelected() {
+		return
+	}
+
+	k := widget.Selected - 1
+	if k < 0 {
+		k = len(widget.list.Items) - 1
+	}
+
+	widget.list.Swap(widget.Selected, k)
+	widget.Selected = k
 	widget.persist()
 	widget.display()
 }
 
 func (widget *Widget) toggleChecked() {
-	widget.list.Toggle()
+	selectedItem := widget.SelectedItem()
+	if selectedItem == nil {
+		return
+	}
+
+	selectedItem.Toggle()
 	widget.persist()
 	widget.display()
 }
 
 func (widget *Widget) unselect() {
-	widget.list.Unselect()
+	widget.Selected = -1
 	widget.display()
 }

modules/todo/widget.go

@@ -23,7 +23,7 @@ const (
 // A Widget represents a Todo widget
 type Widget struct {
 	view.KeyboardWidget
-	view.TextWidget
+	view.ScrollableWidget
 
 	app      *tview.Application
 	settings *Settings
@@ -36,7 +36,7 @@ type Widget struct {
 func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *Widget {
 	widget := Widget{
 		KeyboardWidget:   view.NewKeyboardWidget(app, pages, settings.common),
-		TextWidget:     view.NewTextWidget(app, settings.common),
+		ScrollableWidget: view.NewScrollableWidget(app, settings.common),
 
 		app:      app,
 		settings: settings,
@@ -54,6 +54,7 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 	widget.View.SetScrollable(true)
 
 	widget.KeyboardWidget.SetView(widget.View)
+	widget.SetRenderFunction(widget.display)
 
 	return &widget
 }
@@ -75,18 +76,44 @@ func (widget *Widget) HelpText() string {
 
 /* -------------------- Unexported Functions -------------------- */
 
-// edit opens a modal dialog that permits editing the text of the currently-selected item
+// isItemSelected returns weather any item of the todo is selected or not
-func (widget *Widget) editSelected() {
+func (widget *Widget) isItemSelected() bool {
-	if widget.list.SelectedItem() == nil {
+
+	return widget.Selected >= 0 && widget.Selected < len(widget.list.Items)
+}
+
+// SelectedItem returns the currently-selected checklist item or nil if no item is selected
+func (widget *Widget) SelectedItem() *checklist.ChecklistItem {
+	var selectedItem *checklist.ChecklistItem
+	if widget.isItemSelected() {
+		selectedItem = widget.list.Items[widget.Selected]
+	}
+
+	return selectedItem
+}
+
+// updateSelectedItem update the text of the selected item.
+func (widget *Widget) updateSelectedItem(text string) {
+	selectedItem := widget.SelectedItem()
+	if selectedItem == nil {
 		return
 	}
 
-	form := widget.modalForm("Edit:", widget.list.SelectedItem().Text)
+	selectedItem.Text = text
+}
+
+// updateSelected sets the text of the currently-selected item to the provided text
+func (widget *Widget) updateSelected() {
+	if !widget.isItemSelected() {
+		return
+	}
+
+	form := widget.modalForm("Edit:", widget.SelectedItem().Text)
 
 	saveFctn := func() {
 		text := form.GetFormItem(0).(*tview.InputField).GetText()
 
-		widget.list.Update(text)
+		widget.updateSelectedItem(text)
 		widget.persist()
 		widget.pages.RemovePage("modal")
 		widget.app.SetFocus(widget.View)
@@ -104,7 +131,7 @@ func (widget *Widget) init() {
 	}
 }
 
-// Loads the todo list from Yaml file
+// Loads the todo list from3 Yaml file
 func (widget *Widget) load() {
 	confDir, _ := cfg.WtfConfigDir()
 	filePath := fmt.Sprintf("%s/%s", confDir, widget.filePath)
@@ -113,6 +140,7 @@ func (widget *Widget) load() {
 
 	yaml.Unmarshal(fileData, &widget.list)
 
+	widget.ScrollableWidget.SetItemCount(len(widget.list.Items))
 	widget.setItemChecks()
 }
 
@@ -123,6 +151,7 @@ func (widget *Widget) newItem() {
 		text := form.GetFormItem(0).(*tview.InputField).GetText()
 
 		widget.list.Add(false, text)
+		widget.SetItemCount(len(widget.list.Items))
 		widget.persist()
 		widget.pages.RemovePage("modal")
 		widget.app.SetFocus(widget.View)