Create abtract scrollable widget

This cleans up a bunch of boilerplate for scrollable items and standardizes their usage

modules/datadog/keyboard.go

@@ -6,12 +6,12 @@ import (
 
 func (widget *Widget) initializeKeyboardControls() {
 	widget.SetKeyboardChar("/", widget.ShowHelp)
-	widget.SetKeyboardChar("j", widget.next)
-	widget.SetKeyboardChar("k", widget.prev)
+	widget.SetKeyboardChar("j", widget.Next)
+	widget.SetKeyboardChar("k", widget.Prev)
 	widget.SetKeyboardChar("o", widget.openItem)
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.next)
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
 	widget.SetKeyboardKey(tcell.KeyEnter, widget.openItem)
-	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
-	widget.SetKeyboardKey(tcell.KeyUp, widget.prev)
+	widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
 }

modules/datadog/widget.go

@@ -2,7 +2,6 @@ package datadog
 
 import (
 	"fmt"
-	"strconv"
 
 	"github.com/rivo/tview"
 	"github.com/wtfutil/wtf/wtf"
@@ -24,11 +23,9 @@ const HelpText = `
 
 type Widget struct {
 	wtf.HelpfulWidget
-	wtf.TextWidget
 	wtf.KeyboardWidget
+	wtf.ScrollableWidget
 
-	app      *tview.Application
-	selected int
 	monitors []datadog.Monitor
 	settings *Settings
 }
@@ -37,18 +34,15 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 	widget := Widget{
 		HelpfulWidget:    wtf.NewHelpfulWidget(app, pages, HelpText),
 		KeyboardWidget:   wtf.NewKeyboardWidget(),
-		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
+		ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
 
 		settings: settings,
 	}
 
+	widget.SetRenderFunction(widget.Render)
 	widget.initializeKeyboardControls()
 	widget.View.SetInputCapture(widget.InputCapture)
 
-	widget.unselect()
-
-	widget.View.SetScrollable(true)
-	widget.View.SetRegions(true)
 	widget.HelpfulWidget.SetView(widget.View)
 
 	return &widget
@@ -59,14 +53,10 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 func (widget *Widget) Refresh() {
 	monitors, monitorErr := widget.Monitors()
 
-	var content string
 	if monitorErr != nil {
-		widget.View.SetWrap(true)
-		content = monitorErr.Error()
-		widget.app.QueueUpdateDraw(func() {
-			widget.View.SetTitle(widget.ContextualTitle(widget.CommonSettings.Title))
-			widget.View.SetText(content)
-		})
+		widget.monitors = nil
+		widget.SetItemCount(0)
+		widget.Redraw(widget.CommonSettings.Title, monitorErr.Error(), true)
 		return
 	}
 	triggeredMonitors := []datadog.Monitor{}
@@ -79,19 +69,14 @@ func (widget *Widget) Refresh() {
 		}
 	}
 	widget.monitors = triggeredMonitors
+	widget.SetItemCount(len(widget.monitors))
 
-	widget.display()
+	widget.Render()
 }
 
-func (widget *Widget) display() {
+func (widget *Widget) Render() {
 	content := widget.contentFrom(widget.monitors)
-	widget.app.QueueUpdateDraw(func() {
-		widget.View.SetWrap(false)
-		widget.View.Clear()
-		widget.View.SetTitle(widget.ContextualTitle(widget.CommonSettings.Title))
-		widget.View.SetText(content)
-		widget.View.Highlight(strconv.Itoa(widget.selected)).ScrollToHighlight()
-	})
+	widget.Redraw(widget.CommonSettings.Title, content, false)
 }
 
 /* -------------------- Unexported Functions -------------------- */
@@ -107,9 +92,9 @@ func (widget *Widget) contentFrom(triggeredMonitors []datadog.Monitor) string {
 		for idx, triggeredMonitor := range triggeredMonitors {
 			str = str + fmt.Sprintf(`["%d"][%s][red] %s[%s][""]`,
 				idx,
-				widget.rowColor(idx),
+				widget.RowColor(idx),
 				*triggeredMonitor.Name,
-				widget.rowColor(idx),
+				widget.RowColor(idx),
 			) + "\n"
 		}
 	} else {
@@ -122,40 +107,11 @@ func (widget *Widget) contentFrom(triggeredMonitors []datadog.Monitor) string {
 	return str
 }
 
-func (widget *Widget) unselect() {
-	widget.selected = -1
-	widget.display()
-}
-
-func (widget *Widget) next() {
-	widget.selected++
-	if widget.monitors != nil && widget.selected >= len(widget.monitors) {
-		widget.selected = 0
-	}
-	widget.display()
-}
-
-func (widget *Widget) prev() {
-	widget.selected--
-	if widget.selected < 0 && widget.monitors != nil {
-		widget.selected = len(widget.monitors) - 1
-	}
-	widget.display()
-}
-
 func (widget *Widget) openItem() {
 
-	sel := widget.selected
+	sel := widget.GetSelected()
 	if sel >= 0 && widget.monitors != nil && sel < len(widget.monitors) {
-		item := &widget.monitors[widget.selected]
+		item := &widget.monitors[sel]
 		wtf.OpenFile(fmt.Sprintf("https://app.datadoghq.com/monitors/%d?q=*", *item.Id))
 	}
 }
-
-func (widget *Widget) rowColor(idx int) string {
-	if widget.View.HasFocus() && (idx == widget.selected) {
-		widget.settings.common.DefaultFocussedRowColor()
-	}
-
-	return widget.settings.common.RowColor(idx)
-}

modules/gitter/keyboard.go

@@ -4,11 +4,11 @@ import "github.com/gdamore/tcell"
 
 func (widget *Widget) initializeKeyboardControls() {
 	widget.SetKeyboardChar("/", widget.ShowHelp)
-	widget.SetKeyboardChar("j", widget.next)
-	widget.SetKeyboardChar("k", widget.prev)
+	widget.SetKeyboardChar("j", widget.Next)
+	widget.SetKeyboardChar("k", widget.Prev)
 	widget.SetKeyboardChar("r", widget.Refresh)
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.next)
-	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
-	widget.SetKeyboardKey(tcell.KeyUp, widget.prev)
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
+	widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
 }

modules/gitter/widget.go

@@ -2,7 +2,6 @@ package gitter
 
 import (
 	"fmt"
-	"strconv"
 
 	"github.com/rivo/tview"
 	"github.com/wtfutil/wtf/wtf"
@@ -24,12 +23,9 @@ const HelpText = `
 type Widget struct {
 	wtf.HelpfulWidget
 	wtf.KeyboardWidget
-	wtf.TextWidget
-
-	app *tview.Application
+	wtf.ScrollableWidget
 
 	messages []Message
-	selected int
 	settings *Settings
 }
 
@@ -38,20 +34,15 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 	widget := Widget{
 		HelpfulWidget:    wtf.NewHelpfulWidget(app, pages, HelpText),
 		KeyboardWidget:   wtf.NewKeyboardWidget(),
-		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
+		ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
 
-		app:      app,
 		settings: settings,
 	}
 
+	widget.SetRenderFunction(widget.Refresh)
 	widget.initializeKeyboardControls()
 	widget.View.SetInputCapture(widget.InputCapture)
 
-	widget.unselect()
-
-	widget.View.SetScrollable(true)
-	widget.View.SetRegions(true)
-
 	widget.HelpfulWidget.SetView(widget.View)
 
 	return &widget
@@ -66,25 +57,23 @@ func (widget *Widget) Refresh() {
 
 	room, err := GetRoom(widget.settings.roomURI, widget.settings.apiToken)
 	if err != nil {
-		widget.View.SetWrap(true)
-		widget.View.SetTitle(widget.CommonSettings.Title)
-		widget.View.SetText(err.Error())
+		widget.Redraw(widget.CommonSettings.Title, err.Error(), true)
 		return
 	}
 
 	if room == nil {
+		widget.Redraw(widget.CommonSettings.Title, "No room", true)
 		return
 	}
 
 	messages, err := GetMessages(room.ID, widget.settings.numberOfMessages, widget.settings.apiToken)
 
 	if err != nil {
-		widget.View.SetWrap(true)
-
 		widget.Redraw(widget.CommonSettings.Title, err.Error(), true)
 		return
 	}
 	widget.messages = messages
+	widget.SetItemCount(len(messages))
 
 	widget.display()
 }
@@ -99,10 +88,6 @@ func (widget *Widget) display() {
 	title := fmt.Sprintf("%s - %s", widget.CommonSettings.Title, widget.settings.roomURI)
 
 	widget.Redraw(title, widget.contentFrom(widget.messages), true)
-	widget.app.QueueUpdateDraw(func() {
-		widget.View.Highlight(strconv.Itoa(widget.selected)).ScrollToHighlight()
-		widget.View.ScrollToEnd()
-	})
 }
 
 func (widget *Widget) contentFrom(messages []Message) string {
@@ -111,10 +96,10 @@ func (widget *Widget) contentFrom(messages []Message) string {
 		str = str + fmt.Sprintf(
 			`["%d"][%s] [blue]%s [lightslategray]%s: [%s]%s [aqua]%s[""]`,
 			idx,
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			message.From.DisplayName,
 			message.From.Username,
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			message.Text,
 			message.Sent.Format("Jan 02, 15:04 MST"),
 		)
@@ -125,41 +110,10 @@ func (widget *Widget) contentFrom(messages []Message) string {
 	return str
 }
 
-func (widget *Widget) rowColor(idx int) string {
-	if widget.View.HasFocus() && (idx == widget.selected) {
-		return widget.settings.common.DefaultFocussedRowColor()
-	}
-
-	return widget.settings.common.RowColor(idx)
-}
-
-func (widget *Widget) next() {
-	widget.selected++
-	if widget.messages != nil && widget.selected >= len(widget.messages) {
-		widget.selected = 0
-	}
-
-	widget.display()
-}
-
-func (widget *Widget) prev() {
-	widget.selected--
-	if widget.selected < 0 && widget.messages != nil {
-		widget.selected = len(widget.messages) - 1
-	}
-
-	widget.display()
-}
-
 func (widget *Widget) openMessage() {
-	sel := widget.selected
+	sel := widget.GetSelected()
 	if sel >= 0 && widget.messages != nil && sel < len(widget.messages) {
-		message := &widget.messages[widget.selected]
+		message := &widget.messages[sel]
 		wtf.OpenFile(message.Text)
 	}
 }
-
-func (widget *Widget) unselect() {
-	widget.selected = -1
-	widget.display()
-}

modules/hackernews/keyboard.go

@@ -1,18 +1,17 @@
-
 package hackernews
 
 import "github.com/gdamore/tcell"
 
 func (widget *Widget) initializeKeyboardControls() {
 	widget.SetKeyboardChar("/", widget.ShowHelp)
-	widget.SetKeyboardChar("j", widget.next)
-	widget.SetKeyboardChar("k", widget.prev)
+	widget.SetKeyboardChar("j", widget.Next)
+	widget.SetKeyboardChar("k", widget.Prev)
 	widget.SetKeyboardChar("o", widget.openStory)
 	widget.SetKeyboardChar("r", widget.Refresh)
 	widget.SetKeyboardChar("c", widget.openComments)
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.next)
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
 	widget.SetKeyboardKey(tcell.KeyEnter, widget.openStory)
-	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
-	widget.SetKeyboardKey(tcell.KeyUp, widget.prev)
+	widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
 }

modules/hackernews/widget.go

@@ -3,7 +3,6 @@ package hackernews
 import (
 	"fmt"
 	"net/url"
-	"strconv"
 	"strings"
 
 	"github.com/rivo/tview"
@@ -28,12 +27,9 @@ const HelpText = `
 type Widget struct {
 	wtf.HelpfulWidget
 	wtf.KeyboardWidget
-	wtf.TextWidget
-
-	app *tview.Application
+	wtf.ScrollableWidget
 
 	stories  []Story
-	selected int
 	settings *Settings
 }
 
@@ -41,20 +37,15 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 	widget := Widget{
 		HelpfulWidget:    wtf.NewHelpfulWidget(app, pages, HelpText),
 		KeyboardWidget:   wtf.NewKeyboardWidget(),
-		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
+		ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
 
-		app:      app,
 		settings: settings,
 	}
 
+	widget.SetRenderFunction(widget.Render)
 	widget.initializeKeyboardControls()
 	widget.View.SetInputCapture(widget.InputCapture)
 
-	widget.unselect()
-
-	widget.View.SetScrollable(true)
-	widget.View.SetRegions(true)
-
 	widget.HelpfulWidget.SetView(widget.View)
 
 	return &widget
@@ -73,10 +64,9 @@ func (widget *Widget) Refresh() {
 	}
 
 	if err != nil {
-		widget.View.SetWrap(true)
-		widget.View.SetTitle(widget.ContextualTitle(widget.CommonSettings.Title))
-		widget.View.SetText(err.Error())
-	} else {
+		widget.Redraw(widget.CommonSettings.Title, err.Error(), true)
+		return
+	}
 	var stories []Story
 	for idx := 0; idx < widget.settings.numberOfStories; idx++ {
 		story, e := GetStory(storyIds[idx])
@@ -88,23 +78,20 @@ func (widget *Widget) Refresh() {
 	}
 
 	widget.stories = stories
-	}
+	widget.SetItemCount(len(stories))
 
-	widget.display()
+	widget.Render()
 }
 
 /* -------------------- Unexported Functions -------------------- */
 
-func (widget *Widget) display() {
+func (widget *Widget) Render() {
 	if widget.stories == nil {
 		return
 	}
 
 	title := fmt.Sprintf("%s - %sstories", widget.CommonSettings.Title, widget.settings.storyType)
 	widget.Redraw(title, widget.contentFrom(widget.stories), false)
-	widget.app.QueueUpdateDraw(func() {
-		widget.View.Highlight(strconv.Itoa(widget.selected)).ScrollToHighlight()
-	})
 }
 
 func (widget *Widget) contentFrom(stories []Story) string {
@@ -114,9 +101,9 @@ func (widget *Widget) contentFrom(stories []Story) string {
 		str = str + fmt.Sprintf(
 			`["%d"][""][%s] [yellow]%d. [%s]%s [blue](%s)[""]`,
 			idx,
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			idx+1,
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			story.Title,
 			strings.TrimPrefix(u.Host, "www."),
 		)
@@ -127,49 +114,18 @@ func (widget *Widget) contentFrom(stories []Story) string {
 	return str
 }
 
-func (widget *Widget) rowColor(idx int) string {
-	if widget.View.HasFocus() && (idx == widget.selected) {
-		return widget.settings.common.DefaultFocussedRowColor()
-	}
-
-	return widget.settings.common.RowColor(idx)
-}
-
-func (widget *Widget) next() {
-	widget.selected++
-	if widget.stories != nil && widget.selected >= len(widget.stories) {
-		widget.selected = 0
-	}
-
-	widget.display()
-}
-
-func (widget *Widget) prev() {
-	widget.selected--
-	if widget.selected < 0 && widget.stories != nil {
-		widget.selected = len(widget.stories) - 1
-	}
-
-	widget.display()
-}
-
 func (widget *Widget) openStory() {
-	sel := widget.selected
+	sel := widget.GetSelected()
 	if sel >= 0 && widget.stories != nil && sel < len(widget.stories) {
-		story := &widget.stories[widget.selected]
+		story := &widget.stories[sel]
 		wtf.OpenFile(story.URL)
 	}
 }
 
 func (widget *Widget) openComments() {
-	sel := widget.selected
+	sel := widget.GetSelected()
 	if sel >= 0 && widget.stories != nil && sel < len(widget.stories) {
-		story := &widget.stories[widget.selected]
+		story := &widget.stories[sel]
 		wtf.OpenFile(fmt.Sprintf("https://news.ycombinator.com/item?id=%d", story.ID))
 	}
 }
-
-func (widget *Widget) unselect() {
-	widget.selected = -1
-	widget.display()
-}

modules/jenkins/keyboard.go

@@ -4,13 +4,13 @@ import "github.com/gdamore/tcell"
 
 func (widget *Widget) initializeKeyboardControls() {
 	widget.SetKeyboardChar("/", widget.ShowHelp)
-	widget.SetKeyboardChar("j", widget.next)
-	widget.SetKeyboardChar("k", widget.prev)
+	widget.SetKeyboardChar("j", widget.Next)
+	widget.SetKeyboardChar("k", widget.Prev)
 	widget.SetKeyboardChar("o", widget.openJob)
 	widget.SetKeyboardChar("r", widget.Refresh)
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.next)
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
 	widget.SetKeyboardKey(tcell.KeyEnter, widget.openJob)
-	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
-	widget.SetKeyboardKey(tcell.KeyUp, widget.prev)
+	widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
 }

modules/jenkins/widget.go

@@ -2,8 +2,6 @@ package jenkins
 
 import (
 	"fmt"
-	"strconv"
-
 	"regexp"
 
 	"github.com/rivo/tview"
@@ -27,11 +25,8 @@ const HelpText = `
 type Widget struct {
 	wtf.HelpfulWidget
 	wtf.KeyboardWidget
-	wtf.TextWidget
+	wtf.ScrollableWidget
 
-	app *tview.Application
-
-	selected int
 	settings *Settings
 	view     *View
 }
@@ -40,20 +35,15 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 	widget := Widget{
 		HelpfulWidget:    wtf.NewHelpfulWidget(app, pages, HelpText),
 		KeyboardWidget:   wtf.NewKeyboardWidget(),
-		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
+		ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
 
-		app:      app,
 		settings: settings,
 	}
 
+	widget.SetRenderFunction(widget.Render)
 	widget.initializeKeyboardControls()
 	widget.View.SetInputCapture(widget.InputCapture)
 
-	widget.unselect()
-
-	widget.View.SetScrollable(true)
-	widget.View.SetRegions(true)
-
 	widget.HelpfulWidget.SetView(widget.View)
 
 	return &widget
@@ -78,12 +68,14 @@ func (widget *Widget) Refresh() {
 		return
 	}
 
-	widget.display()
+	widget.SetItemCount(len(widget.view.Jobs))
+
+	widget.Render()
 }
 
 /* -------------------- Unexported Functions -------------------- */
 
-func (widget *Widget) display() {
+func (widget *Widget) Render() {
 	if widget.view == nil {
 		return
 	}
@@ -91,9 +83,6 @@ func (widget *Widget) display() {
 	title := fmt.Sprintf("%s: [red]%s", widget.CommonSettings.Title, widget.view.Name)
 
 	widget.Redraw(title, widget.contentFrom(widget.view), false)
-	widget.app.QueueUpdateDraw(func() {
-		widget.View.Highlight(strconv.Itoa(widget.selected)).ScrollToHighlight()
-	})
 }
 
 func (widget *Widget) contentFrom(view *View) string {
@@ -105,7 +94,7 @@ func (widget *Widget) contentFrom(view *View) string {
 			str = str + fmt.Sprintf(
 				`["%d"][%s] [%s]%-6s[white][""]`,
 				idx,
-				widget.rowColor(idx),
+				widget.RowColor(idx),
 				widget.jobColor(&job),
 				job.Name,
 			)
@@ -117,14 +106,6 @@ func (widget *Widget) contentFrom(view *View) string {
 	return str
 }
 
-func (widget *Widget) rowColor(idx int) string {
-	if widget.View.HasFocus() && (idx == widget.selected) {
-		return widget.settings.common.DefaultFocussedRowColor()
-	}
-
-	return widget.settings.common.RowColor(idx)
-}
-
 func (widget *Widget) jobColor(job *Job) string {
 	switch job.Color {
 	case "blue":
@@ -137,33 +118,10 @@ func (widget *Widget) jobColor(job *Job) string {
 	}
 }
 
-func (widget *Widget) next() {
-	widget.selected++
-	if widget.view != nil && widget.selected >= len(widget.view.Jobs) {
-		widget.selected = 0
-	}
-
-	widget.display()
-}
-
-func (widget *Widget) prev() {
-	widget.selected--
-	if widget.selected < 0 && widget.view != nil {
-		widget.selected = len(widget.view.Jobs) - 1
-	}
-
-	widget.display()
-}
-
 func (widget *Widget) openJob() {
-	sel := widget.selected
+	sel := widget.GetSelected()
 	if sel >= 0 && widget.view != nil && sel < len(widget.view.Jobs) {
-		job := &widget.view.Jobs[widget.selected]
+		job := &widget.view.Jobs[sel]
 		wtf.OpenFile(job.Url)
 	}
 }
-
-func (widget *Widget) unselect() {
-	widget.selected = -1
-	widget.display()
-}

modules/jira/keyboard.go

@@ -6,22 +6,12 @@ import (
 
 func (widget *Widget) initializeKeyboardControls() {
 	widget.SetKeyboardChar("/", widget.ShowHelp)
-	widget.SetKeyboardChar("j", widget.selectNext)
-	widget.SetKeyboardChar("k", widget.selectPrev)
+	widget.SetKeyboardChar("j", widget.Next)
+	widget.SetKeyboardChar("k", widget.Prev)
 	widget.SetKeyboardChar("o", widget.openItem)
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.selectNext)
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
 	widget.SetKeyboardKey(tcell.KeyEnter, widget.openItem)
-	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
-	widget.SetKeyboardKey(tcell.KeyUp, widget.selectPrev)
-}
-
-func (widget *Widget) selectNext() {
-	widget.next()
-	widget.display()
-}
-
-func (widget *Widget) selectPrev() {
-	widget.prev()
-	widget.display()
+	widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
 }

modules/jira/widget.go

@@ -2,7 +2,6 @@ package jira
 
 import (
 	"fmt"
-	"strconv"
 
 	"github.com/rivo/tview"
 	"github.com/wtfutil/wtf/wtf"
@@ -24,12 +23,9 @@ const HelpText = `
 type Widget struct {
 	wtf.HelpfulWidget
 	wtf.KeyboardWidget
-	wtf.TextWidget
-
-	app *tview.Application
+	wtf.ScrollableWidget
 
 	result   *SearchResult
-	selected int
 	settings *Settings
 }
 
@@ -37,20 +33,15 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 	widget := Widget{
 		HelpfulWidget:    wtf.NewHelpfulWidget(app, pages, HelpText),
 		KeyboardWidget:   wtf.NewKeyboardWidget(),
-		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
+		ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
 
-		app:      app,
 		settings: settings,
 	}
 
+	widget.SetRenderFunction(widget.Render)
 	widget.initializeKeyboardControls()
 	widget.View.SetInputCapture(widget.InputCapture)
 
-	widget.unselect()
-
-	widget.View.SetScrollable(true)
-	widget.View.SetRegions(true)
-
 	widget.HelpfulWidget.SetView(widget.View)
 
 	return &widget
@@ -71,12 +62,13 @@ func (widget *Widget) Refresh() {
 		return
 	}
 	widget.result = searchResult
-	widget.display()
+	widget.SetItemCount(len(searchResult.Issues))
+	widget.Render()
 }
 
 /* -------------------- Unexported Functions -------------------- */
 
-func (widget *Widget) display() {
+func (widget *Widget) Render() {
 	if widget.result == nil {
 		return
 	}
@@ -84,38 +76,16 @@ func (widget *Widget) display() {
 	str := fmt.Sprintf("%s- [green]%s[white]", widget.CommonSettings.Title, widget.settings.projects)
 
 	widget.Redraw(str, widget.contentFrom(widget.result), false)
-	widget.app.QueueUpdateDraw(func() {
-		widget.View.Highlight(strconv.Itoa(widget.selected)).ScrollToHighlight()
-	})
-}
-
-func (widget *Widget) next() {
-	widget.selected++
-	if widget.result != nil && widget.selected >= len(widget.result.Issues) {
-		widget.selected = 0
-	}
-}
-
-func (widget *Widget) prev() {
-	widget.selected--
-	if widget.selected < 0 && widget.result != nil {
-		widget.selected = len(widget.result.Issues) - 1
-	}
 }
 
 func (widget *Widget) openItem() {
-	sel := widget.selected
+	sel := widget.GetSelected()
 	if sel >= 0 && widget.result != nil && sel < len(widget.result.Issues) {
-		issue := &widget.result.Issues[widget.selected]
+		issue := &widget.result.Issues[sel]
 		wtf.OpenFile(widget.settings.domain + "/browse/" + issue.Key)
 	}
 }
 
-func (widget *Widget) unselect() {
-	widget.selected = -1
-	widget.display()
-}
-
 func (widget *Widget) contentFrom(searchResult *SearchResult) string {
 	str := " [red]Assigned Issues[white]\n"
 
@@ -123,12 +93,12 @@ func (widget *Widget) contentFrom(searchResult *SearchResult) string {
 		fmtStr := fmt.Sprintf(
 			`["%d"][%s] [%s]%-6s[white] [green]%-10s[white] [yellow][%s][white] [%s]%s[""]`,
 			idx,
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			widget.issueTypeColor(&issue),
 			issue.IssueFields.IssueType.Name,
 			issue.Key,
 			issue.IssueFields.IssueStatus.IName,
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			issue.IssueFields.Summary,
 		)
 
@@ -141,14 +111,6 @@ func (widget *Widget) contentFrom(searchResult *SearchResult) string {
 	return str
 }
 
-func (widget *Widget) rowColor(idx int) string {
-	if widget.View.HasFocus() && (idx == widget.selected) {
-		widget.settings.common.DefaultFocussedRowColor()
-	}
-
-	return widget.settings.common.RowColor(idx)
-}
-
 func (widget *Widget) issueTypeColor(issue *Issue) string {
 	switch issue.IssueFields.IssueType.Name {
 	case "Bug":

modules/rollbar/keyboard.go

@@ -4,14 +4,14 @@ import "github.com/gdamore/tcell"
 
 func (widget *Widget) initializeKeyboardControls() {
 	widget.SetKeyboardChar("/", widget.ShowHelp)
-	widget.SetKeyboardChar("j", widget.next)
-	widget.SetKeyboardChar("k", widget.prev)
+	widget.SetKeyboardChar("j", widget.Next)
+	widget.SetKeyboardChar("k", widget.Prev)
 	widget.SetKeyboardChar("o", widget.openBuild)
 	widget.SetKeyboardChar("r", widget.Refresh)
-	widget.SetKeyboardChar("u", widget.unselect)
+	widget.SetKeyboardChar("u", widget.Unselect)
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.next)
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
 	widget.SetKeyboardKey(tcell.KeyEnter, widget.openBuild)
-	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
-	widget.SetKeyboardKey(tcell.KeyUp, widget.prev)
+	widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
 }

modules/rollbar/widget.go

@@ -26,10 +26,9 @@ const HelpText = `
 type Widget struct {
 	wtf.HelpfulWidget
 	wtf.KeyboardWidget
-	wtf.TextWidget
+	wtf.ScrollableWidget
 
 	items    *Result
-	selected int
 	settings *Settings
 }
 
@@ -38,16 +37,15 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 	widget := Widget{
 		HelpfulWidget:    wtf.NewHelpfulWidget(app, pages, HelpText),
 		KeyboardWidget:   wtf.NewKeyboardWidget(),
-		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
+		ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
 
 		settings: settings,
 	}
 
+	widget.SetRenderFunction(widget.Render)
 	widget.initializeKeyboardControls()
 	widget.View.SetInputCapture(widget.InputCapture)
 
-	widget.unselect()
-
 	widget.HelpfulWidget.SetView(widget.View)
 
 	return &widget
@@ -71,13 +69,14 @@ func (widget *Widget) Refresh() {
 		return
 	}
 	widget.items = &items.Results
+	widget.SetItemCount(len(widget.items.Items))
 
-	widget.display()
+	widget.Refresh()
 }
 
 /* -------------------- Unexported Functions -------------------- */
 
-func (widget *Widget) display() {
+func (widget *Widget) Render() {
 	if widget.items == nil {
 		return
 	}
@@ -98,12 +97,12 @@ func (widget *Widget) contentFrom(result *Result) string {
 
 		str = str + fmt.Sprintf(
 			"[%s] [%s] %s [%s] %s [%s]count: %d [%s]%s\n",
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			levelColor(&item),
 			item.Level,
 			statusColor(&item),
 			item.Title,
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			item.TotalOccurrences,
 			"blue",
 			item.Environment,
@@ -113,14 +112,6 @@ func (widget *Widget) contentFrom(result *Result) string {
 	return str
 }
 
-func (widget *Widget) rowColor(idx int) string {
-	if widget.View.HasFocus() && (idx == widget.selected) {
-		return widget.settings.common.DefaultFocussedRowColor()
-	}
-
-	return widget.settings.common.RowColor(idx)
-}
-
 func statusColor(item *Item) string {
 	switch item.Status {
 	case "active":
@@ -144,27 +135,9 @@ func levelColor(item *Item) string {
 	}
 }
 
-func (widget *Widget) next() {
-	widget.selected++
-	if widget.items != nil && widget.selected >= len(widget.items.Items) {
-		widget.selected = 0
-	}
-
-	widget.display()
-}
-
-func (widget *Widget) prev() {
-	widget.selected--
-	if widget.selected < 0 && widget.items.Items != nil {
-		widget.selected = len(widget.items.Items) - 1
-	}
-
-	widget.display()
-}
-
 func (widget *Widget) openBuild() {
-	if widget.selected >= 0 && widget.items != nil && widget.selected < len(widget.items.Items) {
-		item := &widget.items.Items[widget.selected]
+	if widget.GetSelected() >= 0 && widget.items != nil && widget.GetSelected() < len(widget.items.Items) {
+		item := &widget.items.Items[widget.GetSelected()]
 
 		wtf.OpenFile(
 			fmt.Sprintf(
@@ -177,8 +150,3 @@ func (widget *Widget) openBuild() {
 		)
 	}
 }
-
-func (widget *Widget) unselect() {
-	widget.selected = -1
-	widget.display()
-}

modules/travisci/keyboard.go

@@ -4,13 +4,13 @@ import "github.com/gdamore/tcell"
 
 func (widget *Widget) initializeKeyboardControls() {
 	widget.SetKeyboardChar("/", widget.ShowHelp)
-	widget.SetKeyboardChar("j", widget.next)
-	widget.SetKeyboardChar("k", widget.prev)
+	widget.SetKeyboardChar("j", widget.Next)
+	widget.SetKeyboardChar("k", widget.Prev)
 	widget.SetKeyboardChar("o", widget.openBuild)
 	widget.SetKeyboardChar("r", widget.Refresh)
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.next)
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
 	widget.SetKeyboardKey(tcell.KeyEnter, widget.openBuild)
-	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
-	widget.SetKeyboardKey(tcell.KeyUp, widget.prev)
+	widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
 }

modules/travisci/widget.go

@@ -25,10 +25,9 @@ const HelpText = `
 type Widget struct {
 	wtf.HelpfulWidget
 	wtf.KeyboardWidget
-	wtf.TextWidget
+	wtf.ScrollableWidget
 
 	builds   *Builds
-	selected int
 	settings *Settings
 }
 
@@ -36,16 +35,15 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 	widget := Widget{
 		HelpfulWidget:    wtf.NewHelpfulWidget(app, pages, HelpText),
 		KeyboardWidget:   wtf.NewKeyboardWidget(),
-		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
+		ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
 
 		settings: settings,
 	}
 
+	widget.SetRenderFunction(widget.Render)
 	widget.initializeKeyboardControls()
 	widget.View.SetInputCapture(widget.InputCapture)
 
-	widget.unselect()
-
 	widget.HelpfulWidget.SetView(widget.View)
 
 	return &widget
@@ -65,12 +63,13 @@ func (widget *Widget) Refresh() {
 		return
 	}
 	widget.builds = builds
-	widget.display()
+	widget.SetItemCount(len(builds.Builds))
+	widget.Render()
 }
 
 /* -------------------- Unexported Functions -------------------- */
 
-func (widget *Widget) display() {
+func (widget *Widget) Render() {
 	if widget.builds == nil {
 		return
 	}
@@ -85,12 +84,12 @@ func (widget *Widget) contentFrom(builds *Builds) string {
 
 		str = str + fmt.Sprintf(
 			"[%s] [%s] %s-%s (%s) [%s]%s - [blue]%s\n",
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			buildColor(&build),
 			build.Repository.Name,
 			build.Number,
 			build.Branch.Name,
-			widget.rowColor(idx),
+			widget.RowColor(idx),
 			strings.Split(build.Commit.Message, "\n")[0],
 			build.CreatedBy.Login,
 		)
@@ -99,14 +98,6 @@ func (widget *Widget) contentFrom(builds *Builds) string {
 	return str
 }
 
-func (widget *Widget) rowColor(idx int) string {
-	if widget.View.HasFocus() && (idx == widget.selected) {
-		return widget.settings.common.DefaultFocussedRowColor()
-	}
-
-	return widget.settings.common.RowColor(idx)
-}
-
 func buildColor(build *Build) string {
 	switch build.State {
 	case "broken":
@@ -128,34 +119,11 @@ func buildColor(build *Build) string {
 	}
 }
 
-func (widget *Widget) next() {
-	widget.selected++
-	if widget.builds != nil && widget.selected >= len(widget.builds.Builds) {
-		widget.selected = 0
-	}
-
-	widget.display()
-}
-
-func (widget *Widget) prev() {
-	widget.selected--
-	if widget.selected < 0 && widget.builds != nil {
-		widget.selected = len(widget.builds.Builds) - 1
-	}
-
-	widget.display()
-}
-
 func (widget *Widget) openBuild() {
-	sel := widget.selected
+	sel := widget.GetSelected()
 	if sel >= 0 && widget.builds != nil && sel < len(widget.builds.Builds) {
-		build := &widget.builds.Builds[widget.selected]
+		build := &widget.builds.Builds[sel]
 		travisHost := TRAVIS_HOSTS[widget.settings.pro]
 		wtf.OpenFile(fmt.Sprintf("https://%s/%s/%s/%d", travisHost, build.Repository.Slug, "builds", build.ID))
 	}
 }
-
-func (widget *Widget) unselect() {
-	widget.selected = -1
-	widget.display()
-}

modules/zendesk/keyboard.go

@@ -3,22 +3,12 @@ package zendesk
 import "github.com/gdamore/tcell"
 
 func (widget *Widget) initializeKeyboardControls() {
-	widget.SetKeyboardChar("j", widget.selectNext)
-	widget.SetKeyboardChar("k", widget.selectPrev)
+	widget.SetKeyboardChar("j", widget.Next)
+	widget.SetKeyboardChar("k", widget.Prev)
 	widget.SetKeyboardChar("o", widget.openTicket)
 
-	widget.SetKeyboardKey(tcell.KeyDown, widget.selectNext)
-	widget.SetKeyboardKey(tcell.KeyUp, widget.selectPrev)
+	widget.SetKeyboardKey(tcell.KeyDown, widget.Next)
+	widget.SetKeyboardKey(tcell.KeyUp, widget.Prev)
 	widget.SetKeyboardKey(tcell.KeyEnter, widget.openTicket)
-	widget.SetKeyboardKey(tcell.KeyEsc, widget.unselect)
-}
-
-func (widget *Widget) selectNext() {
-	widget.next()
-	widget.display()
-}
-
-func (widget *Widget) selectPrev() {
-	widget.prev()
-	widget.display()
+	widget.SetKeyboardKey(tcell.KeyEsc, widget.Unselect)
 }

modules/zendesk/widget.go

@@ -11,10 +11,9 @@ import (
 // A Widget represents a Zendesk widget
 type Widget struct {
 	wtf.KeyboardWidget
-	wtf.TextWidget
+	wtf.ScrollableWidget
 
 	result   *TicketArray
-	selected int
 	settings *Settings
 }
 
@@ -22,11 +21,12 @@ type Widget struct {
 func NewWidget(app *tview.Application, settings *Settings) *Widget {
 	widget := Widget{
 		KeyboardWidget:   wtf.NewKeyboardWidget(),
-		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
+		ScrollableWidget: wtf.NewScrollableWidget(app, settings.common, true),
 
 		settings: settings,
 	}
 
+	widget.SetRenderFunction(widget.Render)
 	widget.initializeKeyboardControls()
 	widget.View.SetInputCapture(widget.InputCapture)
 
@@ -44,12 +44,12 @@ func (widget *Widget) Refresh() {
 		widget.result = ticketArray
 	}
 
-	widget.display()
+	widget.Render()
 }
 
 /* -------------------- Unexported Functions -------------------- */
 
-func (widget *Widget) display() {
+func (widget *Widget) Render() {
 	title := fmt.Sprintf("%s (%d)", widget.CommonSettings.Title, widget.result.Count)
 	widget.Redraw(title, widget.textContent(widget.result.Tickets), false)
 }
@@ -69,7 +69,7 @@ func (widget *Widget) textContent(items []Ticket) string {
 
 func (widget *Widget) format(ticket Ticket, idx int) string {
 	textColor := widget.settings.common.Colors.Background
-	if idx == widget.selected {
+	if idx == widget.GetSelected() {
 		textColor = widget.settings.common.Colors.BorderFocused
 	}
 
@@ -91,29 +91,11 @@ func (widget *Widget) parseRequester(ticket Ticket) interface{} {
 	return fromName
 }
 
-func (widget *Widget) next() {
-	widget.selected++
-	if widget.result != nil && widget.selected >= len(widget.result.Tickets) {
-		widget.selected = 0
-	}
-}
-
-func (widget *Widget) prev() {
-	widget.selected--
-	if widget.selected < 0 && widget.result != nil {
-		widget.selected = len(widget.result.Tickets) - 1
-	}
-}
-
 func (widget *Widget) openTicket() {
-	sel := widget.selected
+	sel := widget.GetSelected()
 	if sel >= 0 && widget.result != nil && sel < len(widget.result.Tickets) {
-		issue := &widget.result.Tickets[widget.selected]
+		issue := &widget.result.Tickets[sel]
 		ticketURL := fmt.Sprintf("https://%s.zendesk.com/agent/tickets/%d", widget.settings.subdomain, issue.Id)
 		wtf.OpenFile(ticketURL)
 	}
 }
-
-func (widget *Widget) unselect() {
-	widget.selected = -1
-}

wtf/scrollable.go

@@ -0,0 +1,79 @@
+package wtf
+
+import (
+	"strconv"
+
+	"github.com/rivo/tview"
+	"github.com/wtfutil/wtf/cfg"
+)
+
+type ScrollableWidget struct {
+	TextWidget
+
+	selected       int
+	maxItems       int
+	RenderFunction func()
+}
+
+func NewScrollableWidget(app *tview.Application, commonSettings *cfg.Common, focusable bool) ScrollableWidget {
+
+	widget := ScrollableWidget{
+		TextWidget: NewTextWidget(app, commonSettings, focusable),
+	}
+
+	widget.Unselect()
+	widget.View.SetScrollable(true)
+	widget.View.SetRegions(true)
+	return widget
+}
+
+func (widget *ScrollableWidget) SetRenderFunction(displayFunc func()) {
+	widget.RenderFunction = displayFunc
+}
+
+func (widget *ScrollableWidget) SetItemCount(items int) {
+	widget.maxItems = items
+}
+
+func (widget *ScrollableWidget) GetSelected() int {
+	return widget.selected
+}
+
+func (widget *ScrollableWidget) RowColor(idx int) string {
+	if widget.View.HasFocus() && (idx == widget.selected) {
+		widget.CommonSettings.DefaultFocussedRowColor()
+	}
+
+	return widget.CommonSettings.RowColor(idx)
+}
+
+func (widget *ScrollableWidget) Next() {
+	widget.selected++
+	if widget.selected >= widget.maxItems {
+		widget.selected = 0
+	}
+	widget.RenderFunction()
+}
+
+func (widget *ScrollableWidget) Prev() {
+	widget.selected--
+	if widget.selected < 0 {
+		widget.selected = widget.maxItems - 1
+	}
+	widget.RenderFunction()
+}
+
+func (widget *ScrollableWidget) Unselect() {
+	widget.selected = -1
+	if widget.RenderFunction != nil {
+		widget.RenderFunction()
+	}
+}
+
+func (widget *ScrollableWidget) Redraw(title, content string, wrap bool) {
+
+	widget.TextWidget.Redraw(title, content, wrap)
+	widget.app.QueueUpdateDraw(func() {
+		widget.View.Highlight(strconv.Itoa(widget.selected)).ScrollToHighlight()
+	})
+}