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helpers.go
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/
helpers.go
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package xml
import (
"bytes"
"fmt"
"io"
"strings"
"github.com/gomarkdown/markdown/ast"
"github.com/gomarkdown/markdown/html"
"github.com/mmarkdown/mmark/mast"
)
func (r *Renderer) out(w io.Writer, d []byte) { w.Write(d) }
func (r *Renderer) outs(w io.Writer, s string) { io.WriteString(w, s) }
func (r *Renderer) cr(w io.Writer) { r.outs(w, "\n") }
func (r *Renderer) outAttr(w io.Writer, attrs []string) {
if len(attrs) > 0 {
io.WriteString(w, " ")
io.WriteString(w, strings.Join(attrs, " "))
}
}
func (r *Renderer) outTag(w io.Writer, name string, attrs []string) {
s := name
if len(attrs) > 0 {
s += " " + strings.Join(attrs, " ")
}
io.WriteString(w, s+">")
}
func (r *Renderer) outOneOf(w io.Writer, outFirst bool, first string, second string) {
if outFirst {
r.outs(w, first)
} else {
r.outs(w, second)
}
}
func (r *Renderer) outOneOfCr(w io.Writer, outFirst bool, first string, second string) {
if outFirst {
r.cr(w)
r.outs(w, first)
} else {
r.outs(w, second)
r.cr(w)
}
}
func (r *Renderer) outTagMaybe(w io.Writer, name string, content string) {
if content != "" {
r.outTagContent(w, name, content)
}
}
func (r *Renderer) outTagContent(w io.Writer, name string, content string) {
io.WriteString(w, name+">")
html.EscapeHTML(w, []byte(content))
io.WriteString(w, "</"+name[1:]+">\n")
}
func (r *Renderer) sectionClose(w io.Writer, new *ast.Heading) {
defer func() {
r.section = new
}()
if r.section == nil {
return
}
if r.section.IsSpecial {
tag := "</note>"
if IsAbstract(r.section.Literal) {
tag = "</abstract>"
}
r.outs(w, tag)
r.cr(w)
return
}
// TODO(miek): Probably better to actually count the number of OPEN sections instead of the level of them.
tag := "</section>"
curLevel := r.section.Level
newLevel := 1 // close them all
if new != nil {
newLevel = new.Level
}
// subheading in a heading
if newLevel > curLevel {
return
}
for i := newLevel; i <= curLevel; i++ {
r.outs(w, tag)
r.cr(w)
}
}
func (r *Renderer) ensureUniqueHeadingID(id string) string {
for count, found := r.headingIDs[id]; found; count, found = r.headingIDs[id] {
tmp := fmt.Sprintf("%s-%d", id, count+1)
if _, tmpFound := r.headingIDs[tmp]; !tmpFound {
r.headingIDs[id] = count + 1
id = tmp
} else {
id = id + "-1"
}
}
if _, found := r.headingIDs[id]; !found {
r.headingIDs[id] = 0
}
return id
}
// IsAbstract returns if word is equal to abstract.
func IsAbstract(word []byte) bool {
return strings.EqualFold(string(word), "abstract")
}
// EscapeHTMLString escapes the string s.
func EscapeHTMLString(s string) string {
buf := &bytes.Buffer{}
html.EscapeHTML(buf, []byte(s))
return buf.String()
}
func appendLanguageAttr(node ast.Node, info []byte) {
if len(info) == 0 {
return
}
endOfLang := bytes.IndexAny(info, "\t ")
if endOfLang < 0 {
endOfLang = len(info)
}
mast.SetAttribute(node, "type", info[:endOfLang])
}
// Attributes returns the key values in a stringslice where each is type set as key="value".
func Attributes(keys, values []string) (s []string) {
for i, k := range keys {
if values[i] == "" { // skip entire k=v is value is empty
continue
}
v := EscapeHTMLString(values[i])
s = append(s, fmt.Sprintf(`%s="%s"`, k, v))
}
return s
}
// AttributesContains checks if the attribute list contains key.
func AttributesContains(key string, attr []string) bool {
check := key + `="`
for _, a := range attr {
if strings.HasPrefix(a, check) {
return true
}
}
return false
}