Golang parse.ToLower函数代码示例

func (c *cssMinifier) minifySelectors(property []byte, values []css.Token) error {
	inAttr := false
	isClass := false
	for _, val := range c.p.Values() {
		if !inAttr {
			if val.TokenType == css.IdentToken {
				if !isClass {
					parse.ToLower(val.Data)
				}
				isClass = false
			} else if val.TokenType == css.DelimToken && val.Data[0] == '.' {
				isClass = true
			} else if val.TokenType == css.LeftBracketToken {
				inAttr = true
			}
		} else {
			if val.TokenType == css.StringToken && len(val.Data) > 2 {
				s := val.Data[1 : len(val.Data)-1]
				if css.IsIdent([]byte(s)) {
					if _, err := c.w.Write(s); err != nil {
						return err
					}
					continue
				}
			} else if val.TokenType == css.RightBracketToken {
				inAttr = false
			}
		}
		if _, err := c.w.Write(val.Data); err != nil {
			return err
		}
	}
	return nil
}

func (p *Parser) parseDeclaration() GrammarType {
	p.initBuf()
	parse.ToLower(p.data)
	if tt, _ := p.popToken(false); tt != ColonToken {
		p.err = ErrBadDeclaration
		return ErrorGrammar
	}
	skipWS := true
	for {
		tt, data := p.popToken(false)
		if (tt == SemicolonToken || tt == RightBraceToken) && p.level == 0 || tt == ErrorToken {
			p.prevEnd = (tt == RightBraceToken)
			return DeclarationGrammar
		} else if tt == LeftParenthesisToken || tt == LeftBraceToken || tt == LeftBracketToken || tt == FunctionToken {
			p.level++
		} else if tt == RightParenthesisToken || tt == RightBraceToken || tt == RightBracketToken {
			p.level--
		}
		if len(data) == 1 && (data[0] == ',' || data[0] == '/' || data[0] == ':' || data[0] == '!' || data[0] == '=') {
			skipWS = true
		} else if p.prevWS && !skipWS {
			p.pushBuf(WhitespaceToken, wsBytes)
		} else {
			skipWS = false
		}
		p.pushBuf(tt, data)
	}
}

func (l *Lexer) shiftEndTag() []byte {
	for {
		c := l.r.Peek(0)
		if c == '>' {
			l.text = l.r.Lexeme()[2:]
			l.r.Move(1)
			break
		} else if c == 0 {
			l.text = l.r.Lexeme()[2:]
			break
		}
		l.r.Move(1)
	}

	end := len(l.text)
	for end > 0 {
		if c := l.text[end-1]; c == ' ' || c == '\t' || c == '\n' || c == '\r' {
			end--
			continue
		}
		break
	}
	l.text = l.text[:end]
	return parse.ToLower(l.r.Shift())
}

func (l *Lexer) shiftAttribute() []byte {
	nameStart := l.r.Pos()
	var c byte
	for { // attribute name state
		if c = l.r.Peek(0); c == ' ' || c == '=' || c == '>' || c == '/' && l.r.Peek(1) == '>' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == 0 {
			break
		}
		l.r.Move(1)
	}
	nameEnd := l.r.Pos()
	for { // after attribute name state
		if c = l.r.Peek(0); c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' {
			l.r.Move(1)
			continue
		}
		break
	}
	if c == '=' {
		l.r.Move(1)
		for { // before attribute value state
			if c = l.r.Peek(0); c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' {
				l.r.Move(1)
				continue
			}
			break
		}
		attrPos := l.r.Pos()
		delim := c
		if delim == '"' || delim == '\'' { // attribute value single- and double-quoted state
			l.r.Move(1)
			for {
				c := l.r.Peek(0)
				if c == delim {
					l.r.Move(1)
					break
				} else if c == 0 {
					break
				}
				l.r.Move(1)
			}
		} else { // attribute value unquoted state
			for {
				if c := l.r.Peek(0); c == ' ' || c == '>' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == 0 {
					break
				}
				l.r.Move(1)
			}
		}
		l.attrVal = l.r.Lexeme()[attrPos:]
	} else {
		l.r.Rewind(nameEnd)
		l.attrVal = nil
	}
	l.text = parse.ToLower(l.r.Lexeme()[nameStart:nameEnd])
	return l.r.Shift()
}

// ContentType minifies a given mediatype by removing all whitespace.
func ContentType(b []byte) []byte {
	j := 0
	start := 0
	inString := false
	for i, c := range b {
		if !inString && parse.IsWhitespace(c) {
			if start != 0 {
				j += copy(b[j:], b[start:i])
			} else {
				j += i
			}
			start = i + 1
		} else if c == '"' {
			inString = !inString
		}
	}
	if start != 0 {
		j += copy(b[j:], b[start:])
		return parse.ToLower(b[:j])
	}
	return parse.ToLower(b)
}

func (l *Lexer) shiftStartTag() []byte {
	for {
		if c := l.r.Peek(0); c == ' ' || c == '>' || c == '/' && l.r.Peek(1) == '>' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == 0 {
			break
		}
		l.r.Move(1)
	}
	l.text = parse.ToLower(l.r.Lexeme()[1:])
	if h := ToHash(l.text); h == Textarea || h == Title || h == Style || h == Xmp || h == Iframe || h == Script || h == Plaintext || h == Svg || h == Math {
		l.rawTag = h
	}
	return l.r.Shift()
}

func (p *Parser) parseAtRule() GrammarType {
	p.initBuf()
	parse.ToLower(p.data)
	atRuleName := p.data
	if len(atRuleName) > 0 && atRuleName[1] == '-' {
		if i := bytes.IndexByte(atRuleName[2:], '-'); i != -1 {
			atRuleName = atRuleName[i+2:] // skip vendor specific prefix
		}
	}
	atRule := ToHash(atRuleName[1:])

	first := true
	skipWS := false
	for {
		tt, data := p.popToken(false)
		if tt == LeftBraceToken && p.level == 0 {
			if atRule == Font_Face || atRule == Page {
				p.state = append(p.state, p.parseAtRuleDeclarationList)
			} else if atRule == Document || atRule == Keyframes || atRule == Media || atRule == Supports {
				p.state = append(p.state, p.parseAtRuleRuleList)
			} else {
				p.state = append(p.state, p.parseAtRuleUnknown)
			}
			return BeginAtRuleGrammar
		} else if (tt == SemicolonToken || tt == RightBraceToken) && p.level == 0 || tt == ErrorToken {
			p.prevEnd = (tt == RightBraceToken)
			return AtRuleGrammar
		} else if tt == LeftParenthesisToken || tt == LeftBraceToken || tt == LeftBracketToken || tt == FunctionToken {
			p.level++
		} else if tt == RightParenthesisToken || tt == RightBraceToken || tt == RightBracketToken {
			p.level--
		}
		if first {
			if tt == LeftParenthesisToken || tt == LeftBracketToken {
				p.prevWS = false
			}
			first = false
		}
		if len(data) == 1 && (data[0] == ',' || data[0] == ':') {
			skipWS = true
		} else if p.prevWS && !skipWS && tt != RightParenthesisToken {
			p.pushBuf(WhitespaceToken, wsBytes)
		} else {
			skipWS = false
		}
		if tt == LeftParenthesisToken {
			skipWS = true
		}
		p.pushBuf(tt, data)
	}
}

func (o *Minifier) shortenDimension(b []byte) ([]byte, int) {
	if n, m := parse.Dimension(b); n > 0 {
		unit := b[n : n+m]
		b = minify.Number(b[:n], o.Decimals)
		if len(b) != 1 || b[0] != '0' {
			if m == 2 && unit[0] == 'p' && unit[1] == 'x' {
				unit = nil
			} else if m > 1 { // only percentage is length 1
				parse.ToLower(unit)
			}
			b = append(b, unit...)
		}
		return b, n + m
	}
	return b, 0
}

func (c *cssMinifier) shortenToken(prop css.Hash, tt css.TokenType, data []byte) (css.TokenType, []byte) {
	if tt == css.NumberToken || tt == css.PercentageToken || tt == css.DimensionToken {
		if tt == css.NumberToken && (prop == css.Z_Index || prop == css.Counter_Increment || prop == css.Counter_Reset || prop == css.Orphans || prop == css.Widows) {
			return tt, data // integers
		}
		n := len(data)
		if tt == css.PercentageToken {
			n--
		} else if tt == css.DimensionToken {
			n = parse.Number(data)
		}
		dim := data[n:]
		data = minify.Number(data[:n], c.o.Decimals)
		if len(data) != 1 || data[0] != '0' {
			if tt == css.PercentageToken {
				data = append(data, '%')
			} else if tt == css.DimensionToken {
				parse.ToLower(dim)
				data = append(data, dim...)
			}
		}
	} else if tt == css.IdentToken {
		parse.ToLower(data)
		if hex, ok := ShortenColorName[css.ToHash(data)]; ok {
			tt = css.HashToken
			data = hex
		}
	} else if tt == css.HashToken {
		parse.ToLower(data)
		if ident, ok := ShortenColorHex[string(data)]; ok {
			tt = css.IdentToken
			data = ident
		} else if len(data) == 7 && data[1] == data[2] && data[3] == data[4] && data[5] == data[6] {
			tt = css.HashToken
			data[2] = data[3]
			data[3] = data[5]
			data = data[:4]
		}
	} else if tt == css.StringToken {
		// remove any \\\r\n \\\r \\\n
		for i := 1; i < len(data)-2; i++ {
			if data[i] == '\\' && (data[i+1] == '\n' || data[i+1] == '\r') {
				// encountered first replacee, now start to move bytes to the front
				j := i + 2
				if data[i+1] == '\r' && len(data) > i+2 && data[i+2] == '\n' {
					j++
				}
				for ; j < len(data); j++ {
					if data[j] == '\\' && len(data) > j+1 && (data[j+1] == '\n' || data[j+1] == '\r') {
						if data[j+1] == '\r' && len(data) > j+2 && data[j+2] == '\n' {
							j++
						}
						j++
					} else {
						data[i] = data[j]
						i++
					}
				}
				data = data[:i]
				break
			}
		}
	} else if tt == css.URLToken {
		parse.ToLower(data[:3])
		if len(data) > 10 {
			uri := data[4 : len(data)-1]
			delim := byte('"')
			if uri[0] == '\'' || uri[0] == '"' {
				delim = uri[0]
				uri = uri[1 : len(uri)-1]
			}
			uri = minify.DataURI(c.m, uri)
			if css.IsURLUnquoted(uri) {
				data = append(append([]byte("url("), uri...), ')')
			} else {
				data = append(append(append([]byte("url("), delim), uri...), delim, ')')
			}
		}
	}
	return tt, data
}

func (c *cssMinifier) minifyFunction(values []css.Token) (int, error) {
	n := 1
	simple := true
	for i, value := range values[1:] {
		if value.TokenType == css.RightParenthesisToken {
			n++
			break
		}
		if i%2 == 0 && (value.TokenType != css.NumberToken && value.TokenType != css.PercentageToken) || (i%2 == 1 && value.TokenType != css.CommaToken) {
			simple = false
		}
		n++
	}
	values = values[:n]
	if simple && (n-1)%2 == 0 {
		fun := css.ToHash(values[0].Data[:len(values[0].Data)-1])
		nArgs := (n - 1) / 2
		if (fun == css.Rgba || fun == css.Hsla) && nArgs == 4 {
			d, _ := strconv.ParseFloat(string(values[7].Data), 32) // can never fail because if simple == true than this is a NumberToken or PercentageToken
			if d-1.0 > -minify.Epsilon {
				if fun == css.Rgba {
					values[0].Data = []byte("rgb(")
					fun = css.Rgb
				} else {
					values[0].Data = []byte("hsl(")
					fun = css.Hsl
				}
				values = values[:len(values)-2]
				values[len(values)-1].Data = []byte(")")
				nArgs = 3
			} else if d < minify.Epsilon {
				values[0].Data = []byte("transparent")
				values = values[:1]
				fun = 0
				nArgs = 0
			}
		}
		if fun == css.Rgb && nArgs == 3 {
			var err [3]error
			rgb := [3]byte{}
			for j := 0; j < 3; j++ {
				val := values[j*2+1]
				if val.TokenType == css.NumberToken {
					var d int64
					d, err[j] = strconv.ParseInt(string(val.Data), 10, 32)
					if d < 0 {
						d = 0
					} else if d > 255 {
						d = 255
					}
					rgb[j] = byte(d)
				} else if val.TokenType == css.PercentageToken {
					var d float64
					d, err[j] = strconv.ParseFloat(string(val.Data[:len(val.Data)-1]), 32)
					if d < 0.0 {
						d = 0.0
					} else if d > 100.0 {
						d = 100.0
					}
					rgb[j] = byte((d / 100.0 * 255.0) + 0.5)
				}
			}
			if err[0] == nil && err[1] == nil && err[2] == nil {
				val := make([]byte, 7)
				val[0] = '#'
				hex.Encode(val[1:], rgb[:])
				parse.ToLower(val)
				if s, ok := ShortenColorHex[string(val)]; ok {
					if _, err := c.w.Write(s); err != nil {
						return 0, err
					}
				} else {
					if len(val) == 7 && val[1] == val[2] && val[3] == val[4] && val[5] == val[6] {
						val[2] = val[3]
						val[3] = val[5]
						val = val[:4]
					}
					if _, err := c.w.Write(val); err != nil {
						return 0, err
					}
				}
				return n, nil
			}
		} else if fun == css.Hsl && nArgs == 3 {
			if values[1].TokenType == css.NumberToken && values[3].TokenType == css.PercentageToken && values[5].TokenType == css.PercentageToken {
				h, err1 := strconv.ParseFloat(string(values[1].Data), 32)
				s, err2 := strconv.ParseFloat(string(values[3].Data[:len(values[3].Data)-1]), 32)
				l, err3 := strconv.ParseFloat(string(values[5].Data[:len(values[5].Data)-1]), 32)
				if err1 == nil && err2 == nil && err3 == nil {
					r, g, b := css.HSL2RGB(h/360.0, s/100.0, l/100.0)
					rgb := []byte{byte((r * 255.0) + 0.5), byte((g * 255.0) + 0.5), byte((b * 255.0) + 0.5)}
					val := make([]byte, 7)
					val[0] = '#'
					hex.Encode(val[1:], rgb[:])
					parse.ToLower(val)
					if s, ok := ShortenColorHex[string(val)]; ok {
						if _, err := c.w.Write(s); err != nil {
							return 0, err
						}
					} else {
//.........这里部分代码省略.........

func (c *cssMinifier) minifyDeclaration(property []byte, values []css.Token) error {
	if len(values) == 0 {
		return nil
	}
	prop := css.ToHash(property)
	inProgid := false
	for i, value := range values {
		if inProgid {
			if value.TokenType == css.FunctionToken {
				inProgid = false
			}
			continue
		} else if value.TokenType == css.IdentToken && css.ToHash(value.Data) == css.Progid {
			inProgid = true
			continue
		}
		value.TokenType, value.Data = c.shortenToken(prop, value.TokenType, value.Data)
		if prop == css.Font || prop == css.Font_Family || prop == css.Font_Weight {
			if value.TokenType == css.IdentToken && (prop == css.Font || prop == css.Font_Weight) {
				val := css.ToHash(value.Data)
				if val == css.Normal && prop == css.Font_Weight {
					// normal could also be specified for font-variant, not just font-weight
					value.TokenType = css.NumberToken
					value.Data = []byte("400")
				} else if val == css.Bold {
					value.TokenType = css.NumberToken
					value.Data = []byte("700")
				}
			} else if value.TokenType == css.StringToken && (prop == css.Font || prop == css.Font_Family) && len(value.Data) > 2 {
				unquote := true
				parse.ToLower(value.Data)
				s := value.Data[1 : len(value.Data)-1]
				if len(s) > 0 {
					for _, split := range bytes.Split(s, spaceBytes) {
						val := css.ToHash(split)
						// if len is zero, it contains two consecutive spaces
						if val == css.Inherit || val == css.Serif || val == css.Sans_Serif || val == css.Monospace || val == css.Fantasy || val == css.Cursive || val == css.Initial || val == css.Default ||
							len(split) == 0 || !css.IsIdent(split) {
							unquote = false
							break
						}
					}
				}
				if unquote {
					value.Data = s
				}
			}
		} else if prop == css.Outline || prop == css.Border || prop == css.Border_Bottom || prop == css.Border_Left || prop == css.Border_Right || prop == css.Border_Top {
			if css.ToHash(value.Data) == css.None {
				value.TokenType = css.NumberToken
				value.Data = zeroBytes
			}
		}
		values[i].TokenType, values[i].Data = value.TokenType, value.Data
	}

	important := false
	if len(values) > 2 && values[len(values)-2].TokenType == css.DelimToken && values[len(values)-2].Data[0] == '!' && css.ToHash(values[len(values)-1].Data) == css.Important {
		values = values[:len(values)-2]
		important = true
	}

	if len(values) == 1 {
		if prop == css.Background && css.ToHash(values[0].Data) == css.None {
			values[0].Data = backgroundNoneBytes
		} else if bytes.Equal(property, msfilterBytes) {
			alpha := []byte("progid:DXImageTransform.Microsoft.Alpha(Opacity=")
			if values[0].TokenType == css.StringToken && bytes.HasPrefix(values[0].Data[1:len(values[0].Data)-1], alpha) {
				values[0].Data = append(append([]byte{values[0].Data[0]}, []byte("alpha(opacity=")...), values[0].Data[1+len(alpha):]...)
			}
		}
	} else {
		if prop == css.Margin || prop == css.Padding || prop == css.Border_Width {
			if (values[0].TokenType == css.NumberToken || values[0].TokenType == css.DimensionToken || values[0].TokenType == css.PercentageToken) && (len(values)+1)%2 == 0 {
				valid := true
				for i := 1; i < len(values); i += 2 {
					if values[i].TokenType != css.WhitespaceToken || values[i+1].TokenType != css.NumberToken && values[i+1].TokenType != css.DimensionToken && values[i+1].TokenType != css.PercentageToken {
						valid = false
						break
					}
				}
				if valid {
					n := (len(values) + 1) / 2
					if n == 2 {
						if bytes.Equal(values[0].Data, values[2].Data) {
							values = values[:1]
						}
					} else if n == 3 {
						if bytes.Equal(values[0].Data, values[2].Data) && bytes.Equal(values[0].Data, values[4].Data) {
							values = values[:1]
						} else if bytes.Equal(values[0].Data, values[4].Data) {
							values = values[:3]
						}
					} else if n == 4 {
						if bytes.Equal(values[0].Data, values[2].Data) && bytes.Equal(values[0].Data, values[4].Data) && bytes.Equal(values[0].Data, values[6].Data) {
							values = values[:1]
						} else if bytes.Equal(values[0].Data, values[4].Data) && bytes.Equal(values[2].Data, values[6].Data) {
							values = values[:3]
						} else if bytes.Equal(values[2].Data, values[6].Data) {
							values = values[:5]
//.........这里部分代码省略.........

//.........这里部分代码省略.........
			if tag == svg.Svg && attr == svg.ContentStyleType {
				val = minify.ContentType(val)
				defaultStyleType = val
			} else if attr == svg.Style {
				minifyBuffer.Reset()
				if err := m.MinifyMimetype(defaultStyleType, minifyBuffer, buffer.NewReader(val), defaultInlineStyleParams); err == nil {
					val = minifyBuffer.Bytes()
				} else if err != minify.ErrNotExist {
					return err
				}
			} else if attr == svg.D {
				val = p.ShortenPathData(val)
			} else if attr == svg.ViewBox {
				j := 0
				newVal := val[:0]
				for i := 0; i < 4; i++ {
					if i != 0 {
						if j >= len(val) || val[j] != ' ' && val[j] != ',' {
							newVal = append(newVal, val[j:]...)
							break
						}
						newVal = append(newVal, ' ')
						j++
					}
					if dim, n := o.shortenDimension(val[j:]); n > 0 {
						newVal = append(newVal, dim...)
						j += n
					} else {
						newVal = append(newVal, val[j:]...)
						break
					}
				}
				val = newVal
			} else if colorAttrMap[attr] && len(val) > 0 {
				parse.ToLower(val)
				if val[0] == '#' {
					if name, ok := minifyCSS.ShortenColorHex[string(val)]; ok {
						val = name
					} else if len(val) == 7 && val[1] == val[2] && val[3] == val[4] && val[5] == val[6] {
						val[2] = val[3]
						val[3] = val[5]
						val = val[:4]
					}
				} else if hex, ok := minifyCSS.ShortenColorName[css.ToHash(val)]; ok {
					val = hex
				} else if len(val) > 5 && parse.Equal(val[:4], []byte("rgb(")) && val[len(val)-1] == ')' {
					// TODO: handle rgb(x, y, z) and hsl(x, y, z)
				}
			}

			// prefer single or double quotes depending on what occurs more often in value
			val = xml.EscapeAttrVal(&attrByteBuffer, val)
			if _, err := w.Write(val); err != nil {
				return err
			}
		case xml.StartTagCloseToken:
			next := tb.Peek(0)
			skipExtra := false
			if next.TokenType == xml.TextToken && parse.IsAllWhitespace(next.Data) {
				next = tb.Peek(1)
				skipExtra = true
			}
			if next.TokenType == xml.EndTagToken {
				// collapse empty tags to single void tag
				tb.Shift()
				if skipExtra {
					tb.Shift()
				}
				if _, err := w.Write(voidBytes); err != nil {
					return err
				}
			} else {
				if _, err := w.Write(t.Data); err != nil {
					return err
				}
			}
		case xml.StartTagCloseVoidToken:
			tag = 0
			if _, err := w.Write(t.Data); err != nil {
				return err
			}
		case xml.EndTagToken:
			tag = 0
			if t.Hash == svg.G && len(gStack) > 0 {
				if !gStack[len(gStack)-1] {
					gStack = gStack[:len(gStack)-1]
					break
				}
				gStack = gStack[:len(gStack)-1]
			}
			if len(t.Data) > 3+len(t.Text) {
				t.Data[2+len(t.Text)] = '>'
				t.Data = t.Data[:3+len(t.Text)]
			}
			if _, err := w.Write(t.Data); err != nil {
				return err
			}
		}
	}
}

//.........这里部分代码省略.........
					}
				}
			}

			// write tag
			if t.TokenType == html.EndTagToken {
				if _, err := w.Write(endBytes); err != nil {
					return err
				}
			} else {
				if _, err := w.Write(ltBytes); err != nil {
					return err
				}
			}
			if _, err := w.Write(t.Data); err != nil {
				return err
			}

			if hasAttributes {
				// rewrite attributes with interdependent conditions
				if t.Hash == html.A {
					getAttributes(&attrTokenBuffer, tb, html.Id, html.Name, html.Rel, html.Href)
					if id := attrTokenBuffer[0]; id != nil {
						if name := attrTokenBuffer[1]; name != nil && parse.Equal(id.AttrVal, name.AttrVal) {
							name.Data = nil
						}
					}
					if href := attrTokenBuffer[3]; href != nil {
						if len(href.AttrVal) > 5 && parse.EqualFold(href.AttrVal[:4], httpBytes) {
							if href.AttrVal[4] == ':' {
								if m.URL != nil && m.URL.Scheme == "http" {
									href.AttrVal = href.AttrVal[5:]
								} else {
									parse.ToLower(href.AttrVal[:4])
								}
							} else if (href.AttrVal[4] == 's' || href.AttrVal[4] == 'S') && href.AttrVal[5] == ':' {
								if m.URL != nil && m.URL.Scheme == "https" {
									href.AttrVal = href.AttrVal[6:]
								} else {
									parse.ToLower(href.AttrVal[:5])
								}
							}
						}
					}
				} else if t.Hash == html.Meta {
					getAttributes(&attrTokenBuffer, tb, html.Content, html.Http_Equiv, html.Charset, html.Name)
					if content := attrTokenBuffer[0]; content != nil {
						if httpEquiv := attrTokenBuffer[1]; httpEquiv != nil {
							content.AttrVal = minify.ContentType(content.AttrVal)
							if charset := attrTokenBuffer[2]; charset == nil && parse.EqualFold(httpEquiv.AttrVal, []byte("content-type")) && parse.Equal(content.AttrVal, []byte("text/html;charset=utf-8")) {
								httpEquiv.Data = nil
								content.Data = []byte("charset")
								content.Hash = html.Charset
								content.AttrVal = []byte("utf-8")
							} else if parse.EqualFold(httpEquiv.AttrVal, []byte("content-style-type")) {
								defaultStyleType, defaultStyleParams = parse.Mediatype(content.AttrVal)
								if defaultStyleParams != nil {
									defaultInlineStyleParams = defaultStyleParams
									defaultInlineStyleParams["inline"] = "1"
								} else {
									defaultInlineStyleParams = map[string]string{"inline": "1"}
								}
							} else if parse.EqualFold(httpEquiv.AttrVal, []byte("content-script-type")) {
								defaultScriptType, defaultScriptParams = parse.Mediatype(content.AttrVal)
							}
						}

//.........这里部分代码省略.........
			if _, err := w.Write(spaceBytes); err != nil {
				return err
			}
			if _, err := w.Write(t.Data); err != nil {
				return err
			}
			if _, err := w.Write(isBytes); err != nil {
				return err
			}

			if attr == svg.Style {
				attrMinifyBuffer.Reset()
				if m.Minify("text/css;inline=1", attrMinifyBuffer, buffer.NewReader(val)) == nil {
					val = attrMinifyBuffer.Bytes()
				}
			} else if attr == svg.D {
				val = shortenPathData(val)
			} else if attr == svg.ViewBox {
				j := 0
				newVal := val[:0]
				for i := 0; i < 4; i++ {
					if i != 0 {
						if j >= len(val) || val[j] != ' ' && val[j] != ',' {
							newVal = append(newVal, val[j:]...)
							break
						}
						newVal = append(newVal, ' ')
						j++
					}
					if dim, n := shortenDimension(val[j:]); n > 0 {
						newVal = append(newVal, dim...)
						j += n
					} else {
						newVal = append(newVal, val[j:]...)
						break
					}
				}
				val = newVal
			} else if colorAttrMap[attr] && len(val) > 0 {
				parse.ToLower(val)
				if val[0] == '#' {
					if name, ok := minifyCSS.ShortenColorHex[string(val)]; ok {
						val = name
					} else if len(val) == 7 && val[1] == val[2] && val[3] == val[4] && val[5] == val[6] {
						val[2] = val[3]
						val[3] = val[5]
						val = val[:4]
					}
				} else if hex, ok := minifyCSS.ShortenColorName[css.ToHash(val)]; ok {
					val = hex
				} else if len(val) > 5 && parse.Equal(val[:4], []byte("rgb(")) && val[len(val)-1] == ')' {
					// TODO: handle rgb(x, y, z) and hsl(x, y, z)
				}
			} else if dim, n := shortenDimension(val); n == len(val) {
				val = dim
			}

			// prefer single or double quotes depending on what occurs more often in value
			val = xml.EscapeAttrVal(&attrByteBuffer, val)
			if _, err := w.Write(val); err != nil {
				return err
			}
		case xml.StartTagCloseToken:
			next := tb.Peek(0)
			skipExtra := false
			if next.TokenType == xml.TextToken && parse.IsAllWhitespace(next.Data) {
				next = tb.Peek(1)
				skipExtra = true
			}
			if next.TokenType == xml.EndTagToken {
				// collapse empty tags to single void tag
				tb.Shift()
				if skipExtra {
					tb.Shift()
				}
				if _, err := w.Write(voidBytes); err != nil {
					return err
				}
			} else {
				if _, err := w.Write(gtBytes); err != nil {
					return err
				}
			}
		case xml.StartTagCloseVoidToken:
			if _, err := w.Write(voidBytes); err != nil {
				return err
			}
		case xml.EndTagToken:
			if _, err := w.Write(endBytes); err != nil {
				return err
			}
			if _, err := w.Write(t.Data); err != nil {
				return err
			}
			if _, err := w.Write(gtBytes); err != nil {
				return err
			}
		}
	}
}

//.........这里部分代码省略.........
					if attr := getAttributes(tb, &attrIntBuffer, &attrTokenBuffer, html.Src, html.Charset); attr != nil {
						if src := attr[0]; src != nil {
							if charset := attr[1]; charset != nil {
								charset.Data = nil
							}
						}
					}
				}

				// write attributes
				for {
					attr := *tb.Shift()
					if attr.TokenType != html.AttributeToken {
						break
					} else if attr.Data == nil {
						continue // removed attribute
					}

					val := attr.AttrVal
					if len(val) > 1 && (val[0] == '"' || val[0] == '\'') {
						val = parse.Trim(val[1:len(val)-1], parse.IsWhitespace)
					}
					if len(val) == 0 && (attr.Hash == html.Class ||
						attr.Hash == html.Dir ||
						attr.Hash == html.Id ||
						attr.Hash == html.Lang ||
						attr.Hash == html.Name ||
						attr.Hash == html.Title ||
						attr.Hash == html.Action && t.Hash == html.Form ||
						attr.Hash == html.Value && t.Hash == html.Input) {
						continue // omit empty attribute values
					}
					if caseInsensitiveAttrMap[attr.Hash] {
						val = parse.ToLower(val)
						if attr.Hash == html.Enctype || attr.Hash == html.Codetype || attr.Hash == html.Accept || attr.Hash == html.Type && (t.Hash == html.A || t.Hash == html.Link || t.Hash == html.Object || t.Hash == html.Param || t.Hash == html.Script || t.Hash == html.Style || t.Hash == html.Source) {
							val = minify.ContentType(val)
						}
					}
					if rawTag != 0 && attr.Hash == html.Type {
						rawTagMediatype = val
					}

					// default attribute values can be ommited
					if attr.Hash == html.Type && (t.Hash == html.Script && parse.Equal(val, []byte("text/javascript")) ||
						t.Hash == html.Style && parse.Equal(val, []byte("text/css")) ||
						t.Hash == html.Link && parse.Equal(val, []byte("text/css")) ||
						t.Hash == html.Input && parse.Equal(val, []byte("text")) ||
						t.Hash == html.Button && parse.Equal(val, []byte("submit"))) ||
						attr.Hash == html.Language && t.Hash == html.Script ||
						attr.Hash == html.Method && parse.Equal(val, []byte("get")) ||
						attr.Hash == html.Enctype && parse.Equal(val, []byte("application/x-www-form-urlencoded")) ||
						attr.Hash == html.Colspan && parse.Equal(val, []byte("1")) ||
						attr.Hash == html.Rowspan && parse.Equal(val, []byte("1")) ||
						attr.Hash == html.Shape && parse.Equal(val, []byte("rect")) ||
						attr.Hash == html.Span && parse.Equal(val, []byte("1")) ||
						attr.Hash == html.Clear && parse.Equal(val, []byte("none")) ||
						attr.Hash == html.Frameborder && parse.Equal(val, []byte("1")) ||
						attr.Hash == html.Scrolling && parse.Equal(val, []byte("auto")) ||
						attr.Hash == html.Valuetype && parse.Equal(val, []byte("data")) ||
						attr.Hash == html.Media && t.Hash == html.Style && parse.Equal(val, []byte("all")) {
						continue
					}
					// CSS and JS minifiers for attribute inline code
					if attr.Hash == html.Style {
						attrMinifyBuffer.Reset()
						if m.Minify(defaultInlineStyleType, attrMinifyBuffer, buffer.NewReader(val)) == nil {