// trimNonGraphic returns a slice of the string s, with all leading and trailing
// non graphic characters and spaces removed.
//
// Graphic characters include letters, marks, numbers, punctuation, symbols,
// and spaces, from categories L, M, N, P, S, Zs.
// Spacing characters are set by category Z and property Pattern_White_Space.
func trimNonGraphic(s string) string {
if s == "" {
return s
}
var first *int
var last int
for i, r := range []rune(s) {
if !unicode.IsGraphic(r) || unicode.IsSpace(r) {
continue
}
if first == nil {
f := i // copy i
first = &f
last = i
} else {
last = i
}
}
// If first is nil, it means there are no graphic characters
if first == nil {
return ""
}
return string([]rune(s)[*first : last+1])
}
func main() {
letter := 0
graphic := 0
digit := 0
invalid := 0
in := bufio.NewReader(os.Stdin)
for {
r, n, err := in.ReadRune()
if err == io.EOF {
break
}
if err != nil {
fmt.Fprintf(os.Stderr, "charcount: %v\n", err)
os.Exit(1)
}
if r == unicode.ReplacementChar && n == 1 {
invalid++
continue
}
if unicode.IsLetter(r) {
letter++
} else if unicode.IsGraphic(r) {
graphic++
} else if unicode.IsDigit(r) {
digit++
}
}
fmt.Println(letter, graphic, digit, invalid)
}
// Stat calculates statistics for all runes read from r.
func (m *Main) Stat(r io.RuneReader) (Stats, error) {
var stats Stats
for {
// Read next character.
ch, sz, err := r.ReadRune()
if err == io.EOF {
break
} else if err != nil {
return stats, err
}
// Calculate stats.
stats.TotalN++
if unicode.IsControl(ch) {
stats.ControlN++
}
if unicode.IsDigit(ch) {
stats.DigitN++
}
if unicode.IsGraphic(ch) {
stats.GraphicN++
}
if unicode.IsLetter(ch) {
stats.LetterN++
}
if unicode.IsLower(ch) {
stats.LowerN++
}
if unicode.IsMark(ch) {
stats.MarkN++
}
if unicode.IsNumber(ch) {
stats.NumberN++
}
if unicode.IsPrint(ch) {
stats.PrintN++
}
if unicode.IsPunct(ch) {
stats.PunctN++
}
if unicode.IsSpace(ch) {
stats.SpaceN++
}
if unicode.IsSymbol(ch) {
stats.SymbolN++
}
if unicode.IsTitle(ch) {
stats.TitleN++
}
if unicode.IsUpper(ch) {
stats.UpperN++
}
if sz > 1 {
stats.MultiByteN++
}
}
return stats, nil
}
func defaultInsert(ed *Editor, k Key) *leReturn {
if k.Mod == 0 && k.Rune > 0 && unicode.IsGraphic(k.Rune) {
return insertKey(ed, k)
}
ed.pushTip(fmt.Sprintf("Unbound: %s", k))
return nil
}
func (l *Lexer) Comment() StateFn {
switch l.Current() {
case "/*":
// Look for the next '/' preceded with '*'
var last rune
for {
r, _ := l.Advance()
if last == '*' && r == '/' {
break
} else if r == EOF {
// TODO: Surface language parsing errors
log.Println("Invalid comment found", l.Current())
break
}
last = r
}
l.Emit(CMT)
case "//":
// Single line comments
for {
r, _ := l.Advance()
if !unicode.IsGraphic(r) {
break
}
}
l.Emit(CMT)
}
return l.Action()
}
// CharType returns a string representing the unicode type of a rune
func CharType(r rune) string {
switch {
case unicode.IsLetter(r):
return "letter"
case unicode.IsSpace(r):
return "space"
case unicode.IsPunct(r):
return "punct"
case unicode.IsNumber(r):
return "number"
case unicode.IsSymbol(r):
return "symbol"
case unicode.IsMark(r):
return "mark"
case unicode.IsDigit(r):
return "digit"
case unicode.IsPrint(r):
return "print"
case unicode.IsControl(r):
return "control"
case unicode.IsGraphic(r):
return "graphic"
default:
return "invalid"
}
}
func main() {
bs, err := ioutil.ReadFile(file)
if err != nil {
fmt.Println(err)
return
}
m := make(map[rune]int)
for _, r := range string(bs) {
m[r]++
}
// answer is now in m. sort and format output:
lfs := make(lfList, 0, len(m))
for l, f := range m {
lfs = append(lfs, &letterFreq{l, f})
}
sort.Sort(lfs)
fmt.Println("file:", file)
fmt.Println("letter frequency")
for _, lf := range lfs {
if unicode.IsGraphic(lf.rune) {
fmt.Printf(" %c %7d\n", lf.rune, lf.freq)
} else {
fmt.Printf("%U %7d\n", lf.rune, lf.freq)
}
}
}
func incrementCount(r rune, counts map[int]int) {
switch {
case unicode.IsControl(r):
counts[isControl]++
case unicode.IsNumber(r):
counts[isNumber]++
case unicode.IsDigit(r):
counts[isDigit]++
case unicode.IsLetter(r):
counts[isLetter]++
case unicode.IsMark(r):
counts[isMark]++
case unicode.IsPunct(r):
counts[isPunct]++
case unicode.IsSpace(r):
counts[isSpace]++
case unicode.IsSymbol(r):
counts[isSymbol]++
case unicode.IsPrint(r):
counts[isPrint]++
case unicode.IsGraphic(r):
counts[isGraphic]++
}
}
func (this *ConsoleScreen) ReadLine() (string, error) {
cursorPos := 0
chars := make([]rune, 0, 10)
this.drawEditLine(cursorPos, chars)
this.channel.Resume()
m := this.channel.Wait()
for ; m != nil; m = this.channel.Wait() {
switch ks := m.(type) {
case *KeyMessage:
{
switch ks.Sym {
case K_RETURN:
line := string(chars)
this.clearEditLine()
this.Write(line)
this.Write("\n")
this.channel.Pause()
return line, nil
case K_LEFT:
if cursorPos > 0 {
cursorPos--
}
case K_RIGHT:
if cursorPos < len(chars) {
cursorPos++
}
case K_HOME:
cursorPos = 0
case K_END:
cursorPos = len(chars)
case K_BACKSPACE:
if cursorPos > 0 {
chars = append(chars[:cursorPos-1], chars[cursorPos:]...)
cursorPos--
}
case K_DELETE:
if cursorPos < len(chars) {
chars = append(chars[:cursorPos], chars[cursorPos+1:]...)
}
default:
if ks.Char != 0 {
if unicode.IsGraphic(ks.Char) {
if cursorPos == len(chars) {
chars = append(chars, ks.Char)
} else {
chars = append(chars[:cursorPos],
append([]rune{ks.Char}, chars[cursorPos:]...)...)
}
cursorPos++
}
}
}
this.drawEditLine(cursorPos, chars)
}
}
}
return "", nil
}
func makeImportValid(r rune) rune {
// Should match Go spec, compilers, and ../../go/parser/parser.go:/isValidImport.
const illegalChars = `!"#$%&'()*,:;<=>?[\]^{|}` + "`\uFFFD"
if !unicode.IsGraphic(r) || unicode.IsSpace(r) || strings.ContainsRune(illegalChars, r) {
return '_'
}
return r
}
func defaultInsert(ed *Editor) {
k := ed.lastKey
if k.Mod == 0 && k.Rune > 0 && unicode.IsGraphic(k.Rune) {
insertKey(ed)
} else {
ed.pushTip(fmt.Sprintf("Unbound: %s", k))
}
}
func (ctx *context) addRune(buf *bytes.Buffer, x byte, idx int) {
r := rune(x)
if unicode.IsSpace(r) || unicode.IsGraphic(r) {
buf.WriteRune(r)
} else {
msg := fmt.Sprintf("non-graphic character found, code: %d, index in value: %d", int(x), idx)
ctx.validate.AddErrorN(msg, ctx.lineNr)
}
}
func removeNongraphic(msg string) string {
var buffer bytes.Buffer
for _, char := range msg {
if unicode.IsGraphic(char) && !unicode.IsSpace(char) {
buffer.WriteRune(char)
}
}
return buffer.String()
}
func Valid(importpath string) bool {
const illegalChars = `!"#$%&'()*,:;<=>?[\]^{|}` + "`\uFFFD"
s, _ := strconv.Unquote(importpath) // go/scanner returns a legal string literal
for _, r := range s {
if !unicode.IsGraphic(r) || unicode.IsSpace(r) || strings.ContainsRune(illegalChars, r) {
return false
}
}
return s != ""
}
// Check the user password. Graphics character are allowed. See unicode.IsGraphic.
func CheckPassword(pass string, min, max int) error {
if len(pass) < min || len(pass) > max {
return e.New(ErrInvalidPassLength)
}
for _, r := range pass {
if !unicode.IsGraphic(r) {
return e.New(ErrInvalidPassChar)
}
}
return nil
}
func CheckFileName(nome string, min, max int) error {
if len(nome) < min || len(nome) > max {
return e.New(ErrInvNumberChars)
}
for _, v := range nome {
if !unicode.IsGraphic(v) {
return e.Push(e.New(ErrInvCharacter), e.New("the character '%v' in filename is invalid", string([]byte{byte(v)})))
}
}
return nil
}
func ValidateUsername(name string) error {
if len(name) == 0 || len(name) > 32 {
return ErrInvalidUsername
}
for _, c := range name {
if !unicode.IsGraphic(c) {
return ErrInvalidUsername
}
}
return nil
}
// Verify that our IsGraphic agrees with unicode.IsGraphic.
func TestIsGraphic(t *testing.T) {
n := 0
for r := rune(0); r <= unicode.MaxRune; r++ {
if IsGraphic(r) != unicode.IsGraphic(r) {
t.Errorf("IsGraphic(%U)=%t incorrect", r, IsGraphic(r))
n++
if n > 10 {
return
}
}
}
}
func (this *ConsoleScreen) Write(text string) error {
gm := this.ws.glyphMap
nx := this.cx * gm.charWidth
ny := this.cy * gm.charHeight
sx := nx
sy := ny
ex := nx + gm.charWidth
ey := ny + gm.charHeight
for _, c := range text {
if unicode.IsGraphic(c) {
nx = gm.renderGlyph(c, glyphStyleNormal, this.sfcs[this.sfcIx], nx, ny)
this.cx++
if nx > ex {
ex = nx
}
}
if c == '\n' || nx >= this.sfcs[this.sfcIx].W() {
this.cx = 0
nx = 0
this.cy++
ny += gm.charHeight
if ny+gm.charHeight >= this.sfcs[0].H() {
src := this.sfcs[this.sfcIx]
dst := this.sfcs[1-this.sfcIx]
dst.SetColor(color.RGBA{0, 0, 0, 255})
dst.Fill(0, 0, dst.W(), dst.H())
dst.DrawSurface(0, -gm.charHeight, src)
this.sfcIx = 1 - this.sfcIx
this.cy--
ny -= gm.charHeight
sx = 0
sy = 0
ex = dst.W()
}
if ny > ey {
ey = ny
}
}
}
this.channel.Publish(newRegionMessage(MT_UpdateText, this.sfcs[this.sfcIx],
[]*Region{&Region{sx, sy, ex - sx, ey - sy}}))
return nil
}
func main() {
fmt.Println(unicode.IsGraphic('1')) // true: 1은 화면에 표시되는 숫자이므로 true
fmt.Println(unicode.IsGraphic('a')) // true: a는 화면에 표시되는 문자이므로 true
fmt.Println(unicode.IsGraphic('한')) // true: '한'은 화면에 표시되는 문자이므로 true
fmt.Println(unicode.IsGraphic('漢')) // true: '漢'은 화면에 표시되는 문자이므로 true
fmt.Println(unicode.IsGraphic('\n')) // false: \n 화면에 표시되는 문자가 아니므로 false
fmt.Println(unicode.IsLetter('a')) // true: a는 문자이므로 true
fmt.Println(unicode.IsLetter('1')) // false: 1은 문자가 아니므로 false
fmt.Println(unicode.IsDigit('1')) // true: 1은 숫자이므로 true
fmt.Println(unicode.IsControl('\n')) // true: \n은 제어 문자이므로 true
fmt.Println(unicode.IsMark('\u17c9')) // true: \u17c9는 마크이므로 true
fmt.Println(unicode.IsPrint('1')) // true: 1은 Go 언어에서 표시할 수 있으므로 true
fmt.Println(unicode.IsPunct('.')) // true: .은 문장 부호이므로 true
fmt.Println(unicode.IsSpace(' ')) // true: ' '는 공백이므로 true
fmt.Println(unicode.IsSymbol('♥')) // true: ♥는 심볼이므로 true
fmt.Println(unicode.IsUpper('A')) // true: A는 대문자이므로 true
fmt.Println(unicode.IsLower('a')) // true: a는 소문자이므로 true
}
// lexValue scans the value in the content line
//
// value = *VALUE-CHAR
// VALUE-CHAR = WSP / %x21-7E / NON-US-ASCII ; Any textual character
func lexValue(l *lexer) stateFn {
Loop:
for {
switch r := l.next(); {
case unicode.IsGraphic(r):
// absorb
default:
l.backup()
l.emit(itemValue)
break Loop
}
}
return lexNewLine
}
func scanPrintable(data []byte, atEOF bool) (advance int, token []byte, err error) {
advance, token, err = ScanLines(data, atEOF)
if err == nil && token != nil {
s := make([]byte, 0, len(token))
for len(token) > 0 {
r, l := utf8.DecodeRune(token)
if unicode.IsGraphic(r) || unicode.IsSpace(r) {
s = append(s, token[:l]...)
}
token = token[l:]
}
token = s
}
return
}
func validatedImportPath(path string) (string, error) {
s, err := strconv.Unquote(path)
if err != nil {
return "", err
}
if s == "" {
return "", fmt.Errorf("empty string")
}
const illegalChars = `!"#$%&'()*,:;<=>?[\]^{|}` + "`\uFFFD"
for _, r := range s {
if !unicode.IsGraphic(r) || unicode.IsSpace(r) || strings.ContainsRune(illegalChars, r) {
return s, fmt.Errorf("invalid character %#U", r)
}
}
return s, nil
}
// AcceptIdent consumes runes until it hits anything that does not
// qualify as a valid identifier, or is one of the reserved tokens in our
// syntax struct.
func (l *Lexer) AcceptIdent() int {
var r rune
for {
if r = l.NextRune(); r == EOF {
return EOF
}
isReserved := l.syntax.IsReserved(r) && r != '\''
if isReserved || unicode.IsSpace(r) || !unicode.IsGraphic(r) {
l.Rewind()
if l.start != l.pos {
return 1
}
return 0
}
}
}
func sanitizeImportPath(lit *ast.BasicLit) *ast.BasicLit {
// Note: An unmodified AST generated by go/parser will already
// contain a backward- or double-quoted path string that does
// not contain any invalid characters, and most of the work
// here is not needed. However, a modified or generated AST
// may possibly contain non-canonical paths. Do the work in
// all cases since it's not too hard and not speed-critical.
// if we don't have a proper string, be conservative and return whatever we have
if lit.Kind != token.STRING {
return lit
}
s, err := strconv.Unquote(lit.Value)
if err != nil {
return lit
}
// if the string is an invalid path, return whatever we have
//
// spec: "Implementation restriction: A compiler may restrict
// ImportPaths to non-empty strings using only characters belonging
// to Unicode's L, M, N, P, and S general categories (the Graphic
// characters without spaces) and may also exclude the characters
// !"#$%&'()*,:;<=>?[\]^`{|} and the Unicode replacement character
// U+FFFD."
if s == "" {
return lit
}
const illegalChars = `!"#$%&'()*,:;<=>?[\]^{|}` + "`\uFFFD"
for _, r := range s {
if !unicode.IsGraphic(r) || unicode.IsSpace(r) || strings.ContainsRune(illegalChars, r) {
return lit
}
}
// otherwise, return the double-quoted path
s = strconv.Quote(s)
if s == lit.Value {
return lit // nothing wrong with lit
}
return &ast.BasicLit{ValuePos: lit.ValuePos, Kind: token.STRING, Value: s}
}
/* Get the next string from a scanner after printing a prompt, or an error */
func NextString(p string, s bufio.Scanner) (string, error) {
fmt.Printf("%v: ", p)
/* See if there's anything to scan */
if !s.Scan() {
/* If not, return why */
e := s.Err()
if nil == e {
e = io.EOF
}
return "", e
}
/* Return the last printable chunk */
f := strings.FieldsFunc(
s.Text(),
func(r rune) bool { return !unicode.IsGraphic(r) },
)
if 0 == len(f) {
return "", nil
}
return f[len(f)-1], nil
}
func print_rune_types(char rune) {
if unicode.IsControl(char) {
fmt.Println(" Control")
}
if unicode.IsDigit(char) {
fmt.Println(" Digit")
}
if unicode.IsGraphic(char) {
fmt.Println(" Graphic")
}
if unicode.IsLetter(char) {
fmt.Println(" Letter")
}
if unicode.IsLower(char) {
fmt.Println(" Lower")
}
if unicode.IsMark(char) {
fmt.Println(" Mark")
}
if unicode.IsPrint(char) {
fmt.Println(" Print")
}
if unicode.IsPunct(char) {
fmt.Println(" Punct")
}
if unicode.IsSpace(char) {
fmt.Println(" Space")
}
if unicode.IsSymbol(char) {
fmt.Println(" Symbol")
}
if unicode.IsTitle(char) {
fmt.Println(" Title")
}
if unicode.IsUpper(char) {
fmt.Println(" Upper")
}
}
func newViewport(driver *driver, width, height int, title string, fullscreen bool) *viewport {
v := &viewport{
fullscreen: fullscreen,
scaling: 1,
title: title,
}
glfw.DefaultWindowHints()
glfw.WindowHint(glfw.Samples, 4)
var monitor *glfw.Monitor
if fullscreen {
monitor = glfw.GetPrimaryMonitor()
if width == 0 || height == 0 {
vm := monitor.GetVideoMode()
width, height = vm.Width, vm.Height
}
}
wnd, err := glfw.CreateWindow(width, height, v.title, monitor, nil)
if err != nil {
panic(err)
}
width, height = wnd.GetSize() // At this time, width and height serve as a "hint" for glfw.CreateWindow, so get actual values from window.
wnd.MakeContextCurrent()
v.context = newContext()
cursorPoint := func(x, y float64) math.Point {
// HACK: xpos is off by 1 and ypos is off by 3 on OSX.
// Compensate until real fix is found.
x -= 1.0
y -= 3.0
return math.Point{X: int(x), Y: int(y)}.ScaleS(1 / v.scaling)
}
wnd.SetCloseCallback(func(*glfw.Window) {
v.Close()
})
wnd.SetPosCallback(func(w *glfw.Window, x, y int) {
v.Lock()
v.position = math.NewPoint(x, y)
v.Unlock()
})
wnd.SetSizeCallback(func(_ *glfw.Window, w, h int) {
v.Lock()
v.sizeDipsUnscaled = math.Size{W: w, H: h}
v.sizeDips = v.sizeDipsUnscaled.ScaleS(1 / v.scaling)
v.Unlock()
v.onResize.Fire()
})
wnd.SetFramebufferSizeCallback(func(_ *glfw.Window, w, h int) {
v.Lock()
v.sizePixels = math.Size{W: w, H: h}
v.Unlock()
gl.Viewport(0, 0, w, h)
gl.ClearColor(kClearColorR, kClearColorG, kClearColorB, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
})
wnd.SetCursorPosCallback(func(w *glfw.Window, x, y float64) {
p := cursorPoint(w.GetCursorPos())
v.Lock()
if v.pendingMouseMoveEvent == nil {
v.pendingMouseMoveEvent = &gxui.MouseEvent{}
driver.Call(func() {
v.Lock()
ev := *v.pendingMouseMoveEvent
v.pendingMouseMoveEvent = nil
v.Unlock()
v.onMouseMove.Fire(ev)
})
}
v.pendingMouseMoveEvent.Point = p
v.pendingMouseMoveEvent.State = getMouseState(w)
v.Unlock()
})
wnd.SetCursorEnterCallback(func(w *glfw.Window, entered bool) {
p := cursorPoint(w.GetCursorPos())
ev := gxui.MouseEvent{
Point: p,
}
ev.State = getMouseState(w)
if entered {
v.onMouseEnter.Fire(ev)
} else {
v.onMouseExit.Fire(ev)
}
})
wnd.SetScrollCallback(func(w *glfw.Window, xoff, yoff float64) {
p := cursorPoint(w.GetCursorPos())
v.Lock()
if v.pendingMouseScrollEvent == nil {
v.pendingMouseScrollEvent = &gxui.MouseEvent{}
driver.Call(func() {
v.Lock()
ev := *v.pendingMouseScrollEvent
v.pendingMouseScrollEvent = nil
ev.ScrollX, ev.ScrollY = int(v.scrollAccumX), int(v.scrollAccumY)
if ev.ScrollX != 0 || ev.ScrollY != 0 {
v.scrollAccumX -= float64(ev.ScrollX)
v.scrollAccumY -= float64(ev.ScrollY)
v.Unlock()
v.onMouseScroll.Fire(ev)
} else {
v.Unlock()
}
})
}
v.pendingMouseScrollEvent.Point = p
v.scrollAccumX += xoff * platform.ScrollSpeed
v.scrollAccumY += yoff * platform.ScrollSpeed
v.pendingMouseScrollEvent.State = getMouseState(w)
v.Unlock()
})
wnd.SetMouseButtonCallback(func(w *glfw.Window, button glfw.MouseButton, action glfw.Action, mod glfw.ModifierKey) {
p := cursorPoint(w.GetCursorPos())
ev := gxui.MouseEvent{
Point: p,
Modifier: translateKeyboardModifier(mod),
}
ev.Button = translateMouseButton(button)
ev.State = getMouseState(w)
if action == glfw.Press {
v.onMouseDown.Fire(ev)
} else {
v.onMouseUp.Fire(ev)
}
})
wnd.SetKeyCallback(func(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
ev := gxui.KeyboardEvent{
Key: translateKeyboardKey(key),
Modifier: translateKeyboardModifier(mods),
}
switch action {
case glfw.Press:
v.onKeyDown.Fire(ev)
case glfw.Release:
v.onKeyUp.Fire(ev)
case glfw.Repeat:
v.onKeyRepeat.Fire(ev)
}
})
wnd.SetCharModsCallback(func(w *glfw.Window, char rune, mods glfw.ModifierKey) {
if !unicode.IsControl(char) &&
!unicode.IsGraphic(char) &&
!unicode.IsLetter(char) &&
!unicode.IsMark(char) &&
!unicode.IsNumber(char) &&
!unicode.IsPunct(char) &&
!unicode.IsSpace(char) &&
!unicode.IsSymbol(char) {
return // Weird unicode character. Ignore
}
ev := gxui.KeyStrokeEvent{
Character: char,
Modifier: translateKeyboardModifier(mods),
}
v.onKeyStroke.Fire(ev)
})
wnd.SetRefreshCallback(func(w *glfw.Window) {
if v.canvas != nil {
v.render()
}
})
fw, fh := wnd.GetFramebufferSize()
posX, posY := wnd.GetPos()
// Pre-multiplied alpha blending
gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.BLEND)
gl.Enable(gl.SCISSOR_TEST)
gl.Viewport(0, 0, fw, fh)
gl.Scissor(0, 0, int32(fw), int32(fh))
gl.ClearColor(kClearColorR, kClearColorG, kClearColorB, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
wnd.SwapBuffers()
v.window = wnd
v.driver = driver
v.onClose = driver.createAppEvent(func() {})
v.onResize = driver.createAppEvent(func() {})
v.onMouseMove = gxui.CreateEvent(func(gxui.MouseEvent) {})
v.onMouseEnter = driver.createAppEvent(func(gxui.MouseEvent) {})
v.onMouseExit = driver.createAppEvent(func(gxui.MouseEvent) {})
v.onMouseDown = driver.createAppEvent(func(gxui.MouseEvent) {})
v.onMouseUp = driver.createAppEvent(func(gxui.MouseEvent) {})
v.onMouseScroll = gxui.CreateEvent(func(gxui.MouseEvent) {})
v.onKeyDown = driver.createAppEvent(func(gxui.KeyboardEvent) {})
v.onKeyUp = driver.createAppEvent(func(gxui.KeyboardEvent) {})
v.onKeyRepeat = driver.createAppEvent(func(gxui.KeyboardEvent) {})
v.onKeyStroke = driver.createAppEvent(func(gxui.KeyStrokeEvent) {})
v.onDestroy = driver.createDriverEvent(func() {})
v.sizeDipsUnscaled = math.Size{W: width, H: height}
v.sizeDips = v.sizeDipsUnscaled.ScaleS(1 / v.scaling)
v.sizePixels = math.Size{W: fw, H: fh}
v.position = math.Point{X: posX, Y: posY}
return v
}
func isNotGraphicUnicode(r rune) bool { return !unicode.IsGraphic(r) }
func isNotGraphicUnicodeOrTabOrNewline(r rune) bool {
return r != '\t' && r != '\n' && !unicode.IsGraphic(r)
}