Fix linter warnings

pkg/gocui/escape_test.go

@@ -151,6 +151,7 @@ func TestParseOneColours(t *testing.T) {
 }
 
 func parseEscRunes(t *testing.T, ei *escapeInterpreter, runes string) {
+	t.Helper()
 	for _, b := range []byte(runes) {
 		isEscape, err := ei.parseOne([]byte{b})
 		assert.Equal(t, true, isEscape)

pkg/gocui/gui.go

@@ -912,9 +912,9 @@ func calcScrollbarRune(
 ) rune {
 	if showScrollbar && (position >= scrollbarStart && position <= scrollbarEnd) {
 		return '▐'
-	} else {
-		return runeV
 	}
+
+	return runeV
 }
 
 func calcRealScrollbarStartEnd(v *View) (bool, int, int) {

pkg/gocui/gui_windows.go

@@ -13,9 +13,7 @@ import (
 )
 
 type (
-	wchar uint16
 	short int16
-	dword uint32
 	word  uint16
 )
 

pkg/gocui/tcell_driver.go

@@ -55,17 +55,20 @@ var runeReplacements = map[rune]string{
 func (g *Gui) tcellInit(runeReplacements map[rune]string) error {
 	tcell.SetEncodingFallback(tcell.EncodingFallbackASCII)
 
-	if s, e := tcell.NewScreen(); e != nil {
+	s, e := tcell.NewScreen()
+	if e != nil {
 		return e
-	} else if e = s.Init(); e != nil {
-		return e
-	} else {
-		registerRuneFallbacks(s, runeReplacements)
-
-		g.screen = s
-		Screen = s
-		return nil
 	}
+
+	if e = s.Init(); e != nil {
+		return e
+	}
+
+	registerRuneFallbacks(s, runeReplacements)
+
+	g.screen = s
+	Screen = s
+	return nil
 }
 
 func registerRuneFallbacks(s tcell.Screen, additional map[rune]string) {
@@ -83,15 +86,15 @@ func (g *Gui) tcellInitSimulation(width int, height int) error {
 	s := tcell.NewSimulationScreen("")
 	if e := s.Init(); e != nil {
 		return e
-	} else {
-		g.screen = s
-		Screen = s
-		// setting to a larger value than the typical terminal size
-		// so that during a test we're more likely to see an item to select in a view.
-		s.SetSize(width, height)
-		s.Sync()
-		return nil
 	}
+
+	g.screen = s
+	Screen = s
+	// setting to a larger value than the typical terminal size
+	// so that during a test we're more likely to see an item to select in a view.
+	s.SetSize(width, height)
+	s.Sync()
+	return nil
 }
 
 // tcellSetCell sets the character cell at a given location to the given
@@ -194,9 +197,9 @@ const (
 var (
 	lastMouseKey tcell.ButtonMask = tcell.ButtonNone
 	lastMouseMod tcell.ModMask    = tcell.ModNone
-	dragState    int              = NOT_DRAGGING
-	lastX        int              = 0
-	lastY        int              = 0
+	dragState                     = NOT_DRAGGING
+	lastX                         = 0
+	lastY                         = 0
 )
 
 // this wrapper struct has public keys so we can easily serialize/deserialize to JSON

pkg/gocui/text_area_test.go

@@ -1008,7 +1008,7 @@ func Test_AutoWrapContent(t *testing.T) {
 	}
 }
 
-var testContent string = `Lorem ipsum dolor sit amet, consectetur adipiscing elit.
+var testContent = `Lorem ipsum dolor sit amet, consectetur adipiscing elit.
 Quisque vehicula mi at elit pellentesque, eu pulvinar ligula molestie.
 In vitae orci vitae elit fermentum lobortis sed in nisi.
 Nam non odio nisi.

pkg/gocui/view.go

@@ -881,9 +881,9 @@ func (v *View) writeString(s string) {
 var linkStartChars = []string{"h", "t", "t", "p", "s", ":", "/", "/"}
 
 func findLinkStart(line []cell) int {
-	for i := 0; i < len(line)-len(linkStartChars); i++ {
+	for i := range len(line) - len(linkStartChars) {
 		for j := range linkStartChars {
-			if line[i+j].chr != string(linkStartChars[j]) {
+			if line[i+j].chr != linkStartChars[j] {
 				break
 			}
 			if j == len(linkStartChars)-1 {
@@ -899,7 +899,7 @@ func findLinkStart(line []cell) int {
 // enough, because in markdown it's common to have a hyperlink followed by a
 // ')', so we want to stop there. Hopefully URLs containing ')' are uncommon
 // enough that this is not a problem.
-var lineEndCharacters map[string]bool = map[string]bool{
+var lineEndCharacters = map[string]bool{
 	"":   true,
 	" ":  true,
 	"\n": true,
@@ -927,7 +927,7 @@ func (v *View) autoRenderHyperlinksInCurrentLine() {
 			if _, ok := lineEndCharacters[line[linkEnd].chr]; ok {
 				break
 			}
-			link.WriteString(string(line[linkEnd].chr))
+			link.WriteString(line[linkEnd].chr)
 		}
 		for i := linkStart; i < linkEnd; i++ {
 			v.lines[v.wy][i].hyperlink = link.String()
@@ -988,7 +988,7 @@ func (v *View) parseInput(ch []byte, width int, x int, _ int) (bool, []cell) {
 			chr:       string(ch),
 			width:     width,
 		}
-		for i := 0; i < repeatCount; i++ {
+		for range repeatCount {
 			cells = append(cells, c)
 		}
 	}
@@ -1265,21 +1265,17 @@ func (v *View) draw() {
 		cellIdx := 0
 
 		var c cell
-		for {
-			if x >= maxX {
-				break
-			}
-
+		for x < maxX {
 			if x < 0 {
 				if cellIdx < len(vline.line) {
 					x += uniseg.StringWidth(vline.line[cellIdx].chr)
 					cellIdx++
 					continue
-				} else {
-					// no more characters to write so we're only going to be printing empty cells
-					// past this point
-					x = 0
 				}
+
+				// no more characters to write so we're only going to be printing empty cells
+				// past this point
+				x = 0
 			}
 
 			// if we're out of cells to write, we'll just print empty cells.
@@ -1424,7 +1420,7 @@ func (v *View) BufferLines() []string {
 	lines := make([]string, len(v.lines))
 	for i, l := range v.lines {
 		str := lineType(l).String()
-		str = strings.Replace(str, "\x00", "", -1)
+		str = strings.ReplaceAll(str, "\x00", "")
 		lines[i] = str
 	}
 	return lines
@@ -1447,7 +1443,7 @@ func (v *View) ViewBufferLines() []string {
 	lines := make([]string, len(v.viewLines))
 	for i, l := range v.viewLines {
 		str := lineType(l.line).String()
-		str = strings.Replace(str, "\x00", "", -1)
+		str = strings.ReplaceAll(str, "\x00", "")
 		lines[i] = str
 	}
 	return lines
@@ -1696,7 +1692,7 @@ func (v *View) SelectedLines() []string {
 func (v *View) lineContentAtIdx(idx int) string {
 	line := v.lines[idx]
 	str := lineType(line).String()
-	return strings.Replace(str, "\x00", "", -1)
+	return strings.ReplaceAll(str, "\x00", "")
 }
 
 func (v *View) SelectedPoint() (int, int) {
@@ -1719,9 +1715,9 @@ func (v *View) SelectedLineRange() (int, int) {
 
 	if start > end {
 		return end, start
-	} else {
-		return start, end
 	}
+
+	return start, end
 }
 
 func (v *View) RenderTextArea() {
@@ -1773,7 +1769,7 @@ func (v *View) overwriteLines(y int, content string) {
 	v.wy = y
 	v.clearViewLines()
 
-	lines := strings.Replace(content, "\n", "\x1b[K\n", -1)
+	lines := strings.ReplaceAll(content, "\n", "\x1b[K\n")
 	// If the last line doesn't end with a linefeed, add the erase command at
 	// the end too
 	if !strings.HasSuffix(lines, "\n") {
@@ -1799,7 +1795,7 @@ func (v *View) OverwriteLinesAndClearEverythingElse(lineCount int, y int, conten
 
 	v.overwriteLines(y, content)
 
-	for i := 0; i < y; i += 1 {
+	for i := range y {
 		v.lines[i] = nil
 	}
 
@@ -1924,9 +1920,9 @@ func (v *View) adjustDownwardScrollAmount(scrollHeight int) int {
 	}
 	if oy+scrollHeight < 0 {
 		return 0
-	} else {
-		return scrollHeight
 	}
+
+	return scrollHeight
 }
 
 // scrollMargin is about how many lines must still appear if you scroll
@@ -1938,9 +1934,9 @@ func (v *View) scrollMargin() int {
 		// we should make this into a field on the view to be configured by the client.
 		// For now we're hardcoding it.
 		return 2
-	} else {
-		return 0
 	}
+
+	return 0
 }
 
 // Returns true if the view contains a line containing the given text with the given
@@ -1966,7 +1962,7 @@ func containsColoredTextInLine(fgColorStr string, text string, line []cell) bool
 		cellColor := tcell.NewHexColor(cell.fgColor.Hex())
 
 		if cellColor == fgColor {
-			currentMatch += string(cell.chr)
+			currentMatch += cell.chr
 		} else if currentMatch != "" {
 			if strings.Contains(currentMatch, text) {
 				return true