Golang Regexp.ReplaceAll方法代码示例

func highlight(data []byte) ([]byte, error) {
	var (
		re  *regexp.Regexp
		err error
	)
	for _, rule := range Rules {
		if rule.Expr == "" {
			continue
		}
		if *flDebug {
			log.Printf("compile highlight re: %#v", rule)
		}
		re, err = regexp.Compile(rule.Expr)
		if err != nil {
			return nil, err
		}
		data = re.ReplaceAll(data, []byte(rule.Replace))
	}
	if *flVerbose {
		if *flColorize {
			log.Printf("colorize enabled")
		} else {
			log.Printf("colorize disabled")
		}
	}
	if !*flColorize {
		re, err = regexp.Compile(`\033\[[0-9;]*m`)
		if err != nil {
			return nil, err
		}
		data = re.ReplaceAll(data, []byte(""))
	}
	return data, nil
}

// Marshals a part of the EDIFACT. You can pass a slice callback
// to be called if a slice is found, so you can use different
// delimiters depending on certain factors.
// I don't really like passing in delimiterRegexp, but it saves
// CPU cycles. Could possibly use cache: https://github.com/pmylund/go-cache
func marshalPart(hdr Header, data reflect.Value, delimiter byte, delimiterRegexp *regexp.Regexp, sliceCallback SliceCallback) ([]byte, error) {
	buf := &bytes.Buffer{}

	if data.Kind() == reflect.Interface {
		data = data.Elem()
	}

	switch data.Kind() {
	default:
		return []byte(""), errors.New(fmt.Sprintf("Unknown data type: %s", data.Kind()))
	case reflect.String:
		escapedData := delimiterRegexp.ReplaceAllString(data.String(), string(hdr.ReleaseIndicator())+"$1")
		buf.WriteString(escapedData)
	case reflect.Array, reflect.Slice:
		// Byte slices are special. We treat them just like the string case.
		if data.Type().Elem().Kind() == reflect.Uint8 {
			escapedData := delimiterRegexp.ReplaceAll(data.Bytes(), []byte(string(hdr.ReleaseIndicator())+"$1"))
			buf.Write(escapedData)
			break
		}

		for n := 0; n < data.Len(); n++ {
			cdata := data.Index(n)

			if sliceCallback != nil {
				cbBytes, err := sliceCallback(cdata)
				if err != nil {
					return []byte(""), err
				}
				buf.Write(cbBytes)
			}

			// we don't want to write the delimiter after the last element
			if n+1 < data.Len() {
				buf.WriteByte(delimiter)
			}
		}
	}

	return buf.Bytes(), nil
}

func (c *CssCompressor) performGeneralCleanup() {
	// This function does a lot, ok?
	var sb bytes.Buffer
	var previousIndex int
	var re *regexp.Regexp

	// Remove the spaces before the things that should not have spaces before them.
	// But, be careful not to turn "p :link {...}" into "p:link{...}"
	// Swap out any pseudo-class colons with the token, and then swap back.
	c.Css = RegexFindReplace(c.Css,
		"(^|\\})(([^\\{:])+:)+([^\\{]*\\{)",
		func(groups []string) string {
			s := groups[0]
			s = strings.Replace(s, ":", "___YUICSSMIN_PSEUDOCLASSCOLON___", -1)
			s = strings.Replace(s, "\\\\", "\\\\\\\\", -1)
			s = strings.Replace(s, "\\$", "\\\\\\$", -1)
			return s
		})

	// Remove spaces before the things that should not have spaces before them.
	re, _ = regexp.Compile("\\s+([!{};:>+\\(\\)\\],])")
	c.Css = re.ReplaceAll(c.Css, []byte("$1"))
	// Restore spaces for !important
	c.Css = bytes.Replace(c.Css, []byte("!important"), []byte(" !important"), -1)
	// bring back the colon
	c.Css = bytes.Replace(c.Css, []byte("___YUICSSMIN_PSEUDOCLASSCOLON___"), []byte(":"), -1)

	// retain space for special IE6 cases
	c.Css = RegexFindReplace(c.Css,
		"(?i):first\\-(line|letter)(\\{|,)",
		func(groups []string) string {
			return strings.ToLower(":first-"+groups[1]) + " " + groups[2]
		})

	// no space after the end of a preserved comment
	c.Css = bytes.Replace(c.Css, []byte("*/ "), []byte("*/"), -1)

	// If there are multiple @charset directives, push them to the top of the file.
	c.Css = RegexFindReplace(c.Css,
		"(?i)^(.*)(@charset)( \"[^\"]*\";)",
		func(groups []string) string {
			return strings.ToLower(groups[2]) + groups[3] + groups[1]
		})

	// When all @charset are at the top, remove the second and after (as they are completely ignored).
	c.Css = RegexFindReplace(c.Css,
		"(?i)^((\\s*)(@charset)( [^;]+;\\s*))+",
		func(groups []string) string {
			return groups[2] + strings.ToLower(groups[3]) + groups[4]
		})

	// lowercase some popular @directives
	c.Css = RegexFindReplace(c.Css,
		"(?i)@(charset|font-face|import|(?:-(?:atsc|khtml|moz|ms|o|wap|webkit)-)?keyframe|media|page|namespace)",
		func(groups []string) string {
			return "@" + strings.ToLower(groups[1])
		})

	// lowercase some more common pseudo-elements
	c.Css = RegexFindReplace(c.Css,
		"(?i):(active|after|before|checked|disabled|empty|enabled|first-(?:child|of-type)|focus|hover|last-(?:child|of-type)|link|only-(?:child|of-type)|root|:selection|target|visited)",
		func(groups []string) string {
			return ":" + strings.ToLower(groups[1])
		})

	// lowercase some more common functions
	c.Css = RegexFindReplace(c.Css,
		"(?i):(lang|not|nth-child|nth-last-child|nth-last-of-type|nth-of-type|(?:-(?:moz|webkit)-)?any)\\(",
		func(groups []string) string {
			return ":" + strings.ToLower(groups[1]) + "("
		})

	// lower case some common function that can be values
	// NOTE: rgb() isn't useful as we replace with #hex later, as well as and() is already done for us right after this
	c.Css = RegexFindReplace(c.Css,
		"(?i)([:,\\( ]\\s*)(attr|color-stop|from|rgba|to|url|(?:-(?:atsc|khtml|moz|ms|o|wap|webkit)-)?(?:calc|max|min|(?:repeating-)?(?:linear|radial)-gradient)|-webkit-gradient)",
		func(groups []string) string {
			return groups[1] + strings.ToLower(groups[2])
		})

	// Put the space back in some cases, to support stuff like
	// @media screen and (-webkit-min-device-pixel-ratio:0){
	re, _ = regexp.Compile("(?i)\\band\\(")
	c.Css = re.ReplaceAll(c.Css, []byte("and ("))

	// Remove the spaces after the things that should not have spaces after them.
	re, _ = regexp.Compile("([!{}:;>+\\(\\[,])\\s+")
	c.Css = re.ReplaceAll(c.Css, []byte("$1"))

	// remove unnecessary semicolons
	re, _ = regexp.Compile(";+}")
	c.Css = re.ReplaceAll(c.Css, []byte("}"))

	// Replace 0(px,em,%) with 0.
	re, _ = regexp.Compile("(?i)(^|[^0-9])(?:0?\\.)?0(?:px|em|%|in|cm|mm|pc|pt|ex|deg|g?rad|m?s|k?hz)")
	c.Css = re.ReplaceAll(c.Css, []byte("${1}0"))

	// Replace 0 0 0 0; with 0.
	re, _ = regexp.Compile(":0 0 0 0(;|})")
	re2, _ := regexp.Compile(":0 0 0(;|})")
//.........这里部分代码省略.........