examples/html: Read from stdin and write to stdout
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36c2086c82
commit
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@ -7,76 +7,77 @@ package main
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import (
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import (
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"fmt"
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"fmt"
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"html"
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"html"
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"strings"
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"io"
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"os"
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"git.sr.ht/~adnano/go-gemini"
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"git.sr.ht/~adnano/go-gemini"
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)
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)
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func main() {
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func main() {
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text := gemini.Text{
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hw := HTMLWriter{
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gemini.LineHeading1("Hello, world!"),
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out: os.Stdout,
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gemini.LineText("This is a gemini text document."),
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}
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}
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gemini.ParseLines(os.Stdin, hw.Handle)
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html := textToHTML(text)
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hw.Finish()
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fmt.Print(html)
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}
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}
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// textToHTML returns the Gemini text response as HTML.
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type HTMLWriter struct {
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func textToHTML(text gemini.Text) string {
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out io.Writer
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var b strings.Builder
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pre bool
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var pre bool
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list bool
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var list bool
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}
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for _, l := range text {
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if _, ok := l.(gemini.LineListItem); ok {
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func (h *HTMLWriter) Handle(line gemini.Line) {
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if !list {
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if _, ok := line.(gemini.LineListItem); ok {
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list = true
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if !h.list {
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fmt.Fprint(&b, "<ul>\n")
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h.list = true
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fmt.Fprint(h.out, "<ul>\n")
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}
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}
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} else if list {
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} else if h.list {
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list = false
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h.list = false
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fmt.Fprint(&b, "</ul>\n")
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fmt.Fprint(h.out, "</ul>\n")
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}
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}
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switch l := l.(type) {
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switch line := line.(type) {
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case gemini.LineLink:
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case gemini.LineLink:
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url := html.EscapeString(l.URL)
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url := html.EscapeString(line.URL)
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name := html.EscapeString(l.Name)
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name := html.EscapeString(line.Name)
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if name == "" {
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if name == "" {
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name = url
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name = url
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}
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}
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fmt.Fprintf(&b, "<p><a href='%s'>%s</a></p>\n", url, name)
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fmt.Fprintf(h.out, "<p><a href='%s'>%s</a></p>\n", url, name)
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case gemini.LinePreformattingToggle:
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case gemini.LinePreformattingToggle:
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pre = !pre
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h.pre = !h.pre
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if pre {
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if h.pre {
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fmt.Fprint(&b, "<pre>\n")
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fmt.Fprint(h.out, "<pre>\n")
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} else {
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} else {
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fmt.Fprint(&b, "</pre>\n")
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fmt.Fprint(h.out, "</pre>\n")
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}
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}
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case gemini.LinePreformattedText:
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case gemini.LinePreformattedText:
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fmt.Fprintf(&b, "%s\n", html.EscapeString(string(l)))
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fmt.Fprintf(h.out, "%s\n", html.EscapeString(string(line)))
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case gemini.LineHeading1:
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case gemini.LineHeading1:
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fmt.Fprintf(&b, "<h1>%s</h1>\n", html.EscapeString(string(l)))
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fmt.Fprintf(h.out, "<h1>%s</h1>\n", html.EscapeString(string(line)))
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case gemini.LineHeading2:
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case gemini.LineHeading2:
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fmt.Fprintf(&b, "<h2>%s</h2>\n", html.EscapeString(string(l)))
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fmt.Fprintf(h.out, "<h2>%s</h2>\n", html.EscapeString(string(line)))
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case gemini.LineHeading3:
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case gemini.LineHeading3:
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fmt.Fprintf(&b, "<h3>%s</h3>\n", html.EscapeString(string(l)))
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fmt.Fprintf(h.out, "<h3>%s</h3>\n", html.EscapeString(string(line)))
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case gemini.LineListItem:
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case gemini.LineListItem:
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fmt.Fprintf(&b, "<li>%s</li>\n", html.EscapeString(string(l)))
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fmt.Fprintf(h.out, "<li>%s</li>\n", html.EscapeString(string(line)))
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case gemini.LineQuote:
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case gemini.LineQuote:
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fmt.Fprintf(&b, "<blockquote>%s</blockquote>\n", html.EscapeString(string(l)))
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fmt.Fprintf(h.out, "<blockquote>%s</blockquote>\n", html.EscapeString(string(line)))
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case gemini.LineText:
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case gemini.LineText:
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if l == "" {
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if line == "" {
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fmt.Fprint(&b, "<br>\n")
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fmt.Fprint(h.out, "<br>\n")
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} else {
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} else {
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fmt.Fprintf(&b, "<p>%s</p>\n", html.EscapeString(string(l)))
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fmt.Fprintf(h.out, "<p>%s</p>\n", html.EscapeString(string(line)))
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}
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}
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}
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}
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}
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}
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if pre {
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fmt.Fprint(&b, "</pre>\n")
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func (h *HTMLWriter) Finish() {
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}
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if h.pre {
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if list {
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fmt.Fprint(h.out, "</pre>\n")
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fmt.Fprint(&b, "</ul>\n")
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}
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}
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if h.list {
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return b.String()
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fmt.Fprint(h.out, "</ul>\n")
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}
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}
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}
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