Vendor

vendor/github.com/andybalholm/cascadia/serialize.go

@@ -0,0 +1,176 @@
+package cascadia
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// implements the reverse operation Sel -> string
+
+var specialCharReplacer *strings.Replacer
+
+func init() {
+	var pairs []string
+	for _, s := range ",!\"#$%&'()*+ -./:;<=>?@[\\]^`{|}~" {
+		pairs = append(pairs, string(s), "\\"+string(s))
+	}
+	specialCharReplacer = strings.NewReplacer(pairs...)
+}
+
+// espace special CSS char
+func escape(s string) string { return specialCharReplacer.Replace(s) }
+
+func (c tagSelector) String() string {
+	return c.tag
+}
+
+func (c idSelector) String() string {
+	return "#" + escape(c.id)
+}
+
+func (c classSelector) String() string {
+	return "." + escape(c.class)
+}
+
+func (c attrSelector) String() string {
+	val := c.val
+	if c.operation == "#=" {
+		val = c.regexp.String()
+	} else if c.operation != "" {
+		val = fmt.Sprintf(`"%s"`, val)
+	}
+
+	ignoreCase := ""
+
+	if c.insensitive {
+		ignoreCase = " i"
+	}
+
+	return fmt.Sprintf(`[%s%s%s%s]`, c.key, c.operation, val, ignoreCase)
+}
+
+func (c relativePseudoClassSelector) String() string {
+	return fmt.Sprintf(":%s(%s)", c.name, c.match.String())
+}
+
+func (c containsPseudoClassSelector) String() string {
+	s := "contains"
+	if c.own {
+		s += "Own"
+	}
+	return fmt.Sprintf(`:%s("%s")`, s, c.value)
+}
+
+func (c regexpPseudoClassSelector) String() string {
+	s := "matches"
+	if c.own {
+		s += "Own"
+	}
+	return fmt.Sprintf(":%s(%s)", s, c.regexp.String())
+}
+
+func (c nthPseudoClassSelector) String() string {
+	if c.a == 0 && c.b == 1 { // special cases
+		s := ":first-"
+		if c.last {
+			s = ":last-"
+		}
+		if c.ofType {
+			s += "of-type"
+		} else {
+			s += "child"
+		}
+		return s
+	}
+	var name string
+	switch [2]bool{c.last, c.ofType} {
+	case [2]bool{true, true}:
+		name = "nth-last-of-type"
+	case [2]bool{true, false}:
+		name = "nth-last-child"
+	case [2]bool{false, true}:
+		name = "nth-of-type"
+	case [2]bool{false, false}:
+		name = "nth-child"
+	}
+	s := fmt.Sprintf("+%d", c.b)
+	if c.b < 0 { // avoid +-8 invalid syntax
+		s = strconv.Itoa(c.b)
+	}
+	return fmt.Sprintf(":%s(%dn%s)", name, c.a, s)
+}
+
+func (c onlyChildPseudoClassSelector) String() string {
+	if c.ofType {
+		return ":only-of-type"
+	}
+	return ":only-child"
+}
+
+func (c inputPseudoClassSelector) String() string {
+	return ":input"
+}
+
+func (c emptyElementPseudoClassSelector) String() string {
+	return ":empty"
+}
+
+func (c rootPseudoClassSelector) String() string {
+	return ":root"
+}
+
+func (c linkPseudoClassSelector) String() string {
+	return ":link"
+}
+
+func (c langPseudoClassSelector) String() string {
+	return fmt.Sprintf(":lang(%s)", c.lang)
+}
+
+func (c neverMatchSelector) String() string {
+	return c.value
+}
+
+func (c enabledPseudoClassSelector) String() string {
+	return ":enabled"
+}
+
+func (c disabledPseudoClassSelector) String() string {
+	return ":disabled"
+}
+
+func (c checkedPseudoClassSelector) String() string {
+	return ":checked"
+}
+
+func (c compoundSelector) String() string {
+	if len(c.selectors) == 0 && c.pseudoElement == "" {
+		return "*"
+	}
+	chunks := make([]string, len(c.selectors))
+	for i, sel := range c.selectors {
+		chunks[i] = sel.String()
+	}
+	s := strings.Join(chunks, "")
+	if c.pseudoElement != "" {
+		s += "::" + c.pseudoElement
+	}
+	return s
+}
+
+func (c combinedSelector) String() string {
+	start := c.first.String()
+	if c.second != nil {
+		start += fmt.Sprintf(" %s %s", string(c.combinator), c.second.String())
+	}
+	return start
+}
+
+func (c SelectorGroup) String() string {
+	ck := make([]string, len(c))
+	for i, s := range c {
+		ck[i] = s.String()
+	}
+	return strings.Join(ck, ", ")
+}