mirror of
https://github.com/golang/go
synced 2024-09-30 18:18:32 -06:00
internal/lsp: convert comments to markdown before sending to client
This converts all the comments from golang doc syntax to popper markdown. Fixes #34161 Change-Id: If513100170e7d8c159bfa93b0d1e36d293e9872f GitHub-Last-Rev: 093f82e6ad8567b3e41bcf5daf14e9c0b5832015 GitHub-Pull-Request: golang/tools#165 Reviewed-on: https://go-review.googlesource.com/c/tools/+/197760 Reviewed-by: Rebecca Stambler <rstambler@golang.org> Run-TryBot: Rebecca Stambler <rstambler@golang.org>
This commit is contained in:
jaap aarts
Rebecca Stambler
parent
b22818684c
commit
27eeabb020
@ -49,20 +49,33 @@ func (s *Server) toProtocolHoverContents(ctx context.Context, h *source.HoverInf
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if content.Kind == protocol.Markdown {
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signature = fmt.Sprintf("```go\n%s\n```", h.Signature)
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}
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switch options.HoverKind {
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case source.SingleLine:
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content.Value = h.SingleLine
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doc := h.SingleLine
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if content.Kind == protocol.Markdown {
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doc = source.CommentToMarkdown(doc)
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}
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content.Value = doc
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case source.NoDocumentation:
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content.Value = signature
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case source.SynopsisDocumentation:
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if h.Synopsis != "" {
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content.Value = fmt.Sprintf("%s\n%s", h.Synopsis, signature)
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doc := h.Synopsis
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if content.Kind == protocol.Markdown {
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doc = source.CommentToMarkdown(h.Synopsis)
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}
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content.Value = fmt.Sprintf("%s\n%s", doc, signature)
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} else {
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content.Value = signature
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}
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case source.FullDocumentation:
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if h.FullDocumentation != "" {
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content.Value = fmt.Sprintf("%s\n%s", signature, h.FullDocumentation)
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doc := h.FullDocumentation
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if content.Kind == protocol.Markdown {
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doc = source.CommentToMarkdown(h.FullDocumentation)
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}
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content.Value = fmt.Sprintf("%s\n%s", signature, doc)
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} else {
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content.Value = signature
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}
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389
internal/lsp/source/comment.go
Normal file
389
internal/lsp/source/comment.go
Normal file
@ -0,0 +1,389 @@
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package source
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import (
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"bytes"
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"io"
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"regexp"
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"strings"
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"unicode"
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"unicode/utf8"
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)
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// CommentToMarkdown converts comment text to formatted markdown.
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// The comment was prepared by DocReader,
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// so it is known not to have leading, trailing blank lines
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// nor to have trailing spaces at the end of lines.
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// The comment markers have already been removed.
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//
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// Each line is converted into a markdown line and empty lines are just converted to
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// newlines. Heading are prefixed with `### ` to make it a markdown heading.
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//
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// A span of indented lines retains a 4 space prefix block, with the common indent
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// prefix removed unless empty, in which case it will be converted to a newline.
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//
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// URLs in the comment text are converted into links.
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func CommentToMarkdown(text string) string {
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buf := &bytes.Buffer{}
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commentToMarkdown(buf, text)
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return buf.String()
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}
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var (
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mdNewline = []byte("\n")
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mdHeader = []byte("### ")
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mdIndent = []byte(" ")
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mdLinkStart = []byte("[")
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mdLinkDiv = []byte("](")
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mdLinkEnd = []byte(")")
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)
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func commentToMarkdown(w io.Writer, text string) {
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isFirstLine := true
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for _, b := range blocks(text) {
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switch b.op {
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case opPara:
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if !isFirstLine {
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w.Write(mdNewline)
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}
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for _, line := range b.lines {
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emphasize(w, line, true)
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}
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case opHead:
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if !isFirstLine {
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w.Write(mdNewline)
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}
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w.Write(mdNewline)
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for _, line := range b.lines {
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w.Write(mdHeader)
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commentEscape(w, line, true)
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w.Write(mdNewline)
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}
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case opPre:
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if !isFirstLine {
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w.Write(mdNewline)
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}
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w.Write(mdNewline)
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for _, line := range b.lines {
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if isBlank(line) {
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w.Write(mdNewline)
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} else {
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w.Write(mdIndent)
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w.Write([]byte(line))
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w.Write(mdNewline)
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}
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}
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}
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isFirstLine = false
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}
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}
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const (
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ulquo = "“"
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urquo = "”"
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)
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var (
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markdownEscape = regexp.MustCompile(`([\\\x60*{}[\]()#+\-.!_>~|"$%&'\/:;<=?@^])`)
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unicodeQuoteReplacer = strings.NewReplacer("``", ulquo, "''", urquo)
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)
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// commentEscape escapes comment text for markdown. If nice is set,
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// also turn `` into “; and '' into ”;.
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func commentEscape(w io.Writer, text string, nice bool) {
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if nice {
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text = convertQuotes(text)
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}
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text = escapeRegex(text)
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w.Write([]byte(text))
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}
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func convertQuotes(text string) string {
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return unicodeQuoteReplacer.Replace(text)
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}
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func escapeRegex(text string) string {
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return markdownEscape.ReplaceAllString(text, `\$1`)
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}
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func emphasize(w io.Writer, line string, nice bool) {
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for {
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m := matchRx.FindStringSubmatchIndex(line)
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if m == nil {
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break
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}
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// m >= 6 (two parenthesized sub-regexps in matchRx, 1st one is urlRx)
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// write text before match
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commentEscape(w, line[0:m[0]], nice)
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// adjust match for URLs
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match := line[m[0]:m[1]]
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if strings.Contains(match, "://") {
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m0, m1 := m[0], m[1]
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for _, s := range []string{"()", "{}", "[]"} {
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open, close := s[:1], s[1:] // E.g., "(" and ")"
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// require opening parentheses before closing parentheses (#22285)
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if i := strings.Index(match, close); i >= 0 && i < strings.Index(match, open) {
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m1 = m0 + i
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match = line[m0:m1]
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}
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// require balanced pairs of parentheses (#5043)
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for i := 0; strings.Count(match, open) != strings.Count(match, close) && i < 10; i++ {
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m1 = strings.LastIndexAny(line[:m1], s)
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match = line[m0:m1]
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}
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}
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if m1 != m[1] {
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// redo matching with shortened line for correct indices
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m = matchRx.FindStringSubmatchIndex(line[:m[0]+len(match)])
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}
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}
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// Following code has been modified from go/doc since words is always
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// nil. All html formatting has also been transformed into markdown formatting
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// analyze match
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url := ""
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if m[2] >= 0 {
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url = match
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}
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// write match
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if len(url) > 0 {
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w.Write(mdLinkStart)
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}
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commentEscape(w, match, nice)
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if len(url) > 0 {
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w.Write(mdLinkDiv)
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w.Write([]byte(urlReplacer.Replace(url)))
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w.Write(mdLinkEnd)
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}
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// advance
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line = line[m[1]:]
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}
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commentEscape(w, line, nice)
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}
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// Everything from here on is a copy of go/doc/comment.go
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const (
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// Regexp for Go identifiers
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identRx = `[\pL_][\pL_0-9]*`
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// Regexp for URLs
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// Match parens, and check later for balance - see #5043, #22285
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// Match .,:;?! within path, but not at end - see #18139, #16565
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// This excludes some rare yet valid urls ending in common punctuation
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// in order to allow sentences ending in URLs.
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// protocol (required) e.g. http
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protoPart = `(https?|ftp|file|gopher|mailto|nntp)`
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// host (required) e.g. www.example.com or [::1]:8080
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hostPart = `([a-zA-Z0-9_@\-.\[\]:]+)`
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// path+query+fragment (optional) e.g. /path/index.html?q=foo#bar
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pathPart = `([.,:;?!]*[a-zA-Z0-9$'()*+&#=@~_/\-\[\]%])*`
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urlRx = protoPart + `://` + hostPart + pathPart
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)
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var (
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matchRx = regexp.MustCompile(`(` + urlRx + `)|(` + identRx + `)`)
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urlReplacer = strings.NewReplacer(`(`, `\(`, `)`, `\)`)
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)
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func indentLen(s string) int {
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i := 0
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for i < len(s) && (s[i] == ' ' || s[i] == '\t') {
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i++
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}
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return i
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}
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func isBlank(s string) bool {
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return len(s) == 0 || (len(s) == 1 && s[0] == '\n')
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}
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func commonPrefix(a, b string) string {
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i := 0
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for i < len(a) && i < len(b) && a[i] == b[i] {
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i++
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}
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return a[0:i]
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}
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func unindent(block []string) {
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if len(block) == 0 {
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return
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}
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// compute maximum common white prefix
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prefix := block[0][0:indentLen(block[0])]
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for _, line := range block {
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if !isBlank(line) {
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prefix = commonPrefix(prefix, line[0:indentLen(line)])
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}
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}
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n := len(prefix)
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// remove
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for i, line := range block {
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if !isBlank(line) {
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block[i] = line[n:]
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}
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}
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}
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// heading returns the trimmed line if it passes as a section heading;
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// otherwise it returns the empty string.
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func heading(line string) string {
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line = strings.TrimSpace(line)
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if len(line) == 0 {
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return ""
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}
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// a heading must start with an uppercase letter
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r, _ := utf8.DecodeRuneInString(line)
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if !unicode.IsLetter(r) || !unicode.IsUpper(r) {
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return ""
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}
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// it must end in a letter or digit:
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r, _ = utf8.DecodeLastRuneInString(line)
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if !unicode.IsLetter(r) && !unicode.IsDigit(r) {
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return ""
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}
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// exclude lines with illegal characters. we allow "(),"
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if strings.ContainsAny(line, ";:!?+*/=[]{}_^°&§~%#@<\">\\") {
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return ""
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}
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// allow "'" for possessive "'s" only
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for b := line; ; {
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i := strings.IndexRune(b, '\'')
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if i < 0 {
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break
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}
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if i+1 >= len(b) || b[i+1] != 's' || (i+2 < len(b) && b[i+2] != ' ') {
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return "" // not followed by "s "
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}
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b = b[i+2:]
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}
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// allow "." when followed by non-space
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for b := line; ; {
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i := strings.IndexRune(b, '.')
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if i < 0 {
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break
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}
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if i+1 >= len(b) || b[i+1] == ' ' {
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return "" // not followed by non-space
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}
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b = b[i+1:]
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}
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return line
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}
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type op int
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const (
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opPara op = iota
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opHead
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opPre
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)
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type block struct {
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op op
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lines []string
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}
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var nonAlphaNumRx = regexp.MustCompile(`[^a-zA-Z0-9]`)
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func anchorID(line string) string {
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// Add a "hdr-" prefix to avoid conflicting with IDs used for package symbols.
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return "hdr-" + nonAlphaNumRx.ReplaceAllString(line, "_")
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}
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func blocks(text string) []block {
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var (
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out []block
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para []string
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lastWasBlank = false
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lastWasHeading = false
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)
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close := func() {
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if para != nil {
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out = append(out, block{opPara, para})
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para = nil
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}
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}
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lines := strings.SplitAfter(text, "\n")
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unindent(lines)
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for i := 0; i < len(lines); {
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line := lines[i]
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if isBlank(line) {
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// close paragraph
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close()
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i++
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lastWasBlank = true
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continue
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}
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if indentLen(line) > 0 {
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// close paragraph
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close()
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// count indented or blank lines
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j := i + 1
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for j < len(lines) && (isBlank(lines[j]) || indentLen(lines[j]) > 0) {
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j++
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}
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// but not trailing blank lines
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for j > i && isBlank(lines[j-1]) {
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j--
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}
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pre := lines[i:j]
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i = j
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unindent(pre)
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// put those lines in a pre block
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out = append(out, block{opPre, pre})
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lastWasHeading = false
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continue
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}
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if lastWasBlank && !lastWasHeading && i+2 < len(lines) &&
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isBlank(lines[i+1]) && !isBlank(lines[i+2]) && indentLen(lines[i+2]) == 0 {
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// current line is non-blank, surrounded by blank lines
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// and the next non-blank line is not indented: this
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// might be a heading.
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if head := heading(line); head != "" {
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close()
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out = append(out, block{opHead, []string{head}})
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i += 2
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lastWasHeading = true
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continue
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}
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}
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// open paragraph
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lastWasBlank = false
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lastWasHeading = false
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para = append(para, lines[i])
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i++
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}
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close()
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return out
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}
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226
internal/lsp/source/comment_test.go
Normal file
226
internal/lsp/source/comment_test.go
Normal file
@ -0,0 +1,226 @@
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package source
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import (
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"bytes"
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"reflect"
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"strings"
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"testing"
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)
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// This file is a copy of go/doc/comment_test.go with the exception for
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// the test cases for TestEmphasize and TestCommentEscape
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var headingTests = []struct {
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line string
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ok bool
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}{
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{"Section", true},
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{"A typical usage", true},
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{"ΔΛΞ is Greek", true},
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{"Foo 42", true},
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{"", false},
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{"section", false},
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{"A typical usage:", false},
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{"This code:", false},
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{"δ is Greek", false},
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{"Foo §", false},
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{"Fermat's Last Sentence", true},
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{"Fermat's", true},
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{"'sX", false},
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{"Ted 'Too' Bar", false},
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{"Use n+m", false},
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{"Scanning:", false},
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{"N:M", false},
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}
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func TestIsHeading(t *testing.T) {
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for _, tt := range headingTests {
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if h := heading(tt.line); (len(h) > 0) != tt.ok {
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t.Errorf("isHeading(%q) = %v, want %v", tt.line, h, tt.ok)
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}
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}
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}
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var blocksTests = []struct {
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in string
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out []block
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text string
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}{
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{
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in: `Para 1.
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Para 1 line 2.
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Para 2.
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Section
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Para 3.
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pre
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pre1
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Para 4.
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|
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pre
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pre1
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pre2
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Para 5.
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|
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pre
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pre1
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pre2
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Para 6.
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pre
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pre2
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`,
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out: []block{
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{opPara, []string{"Para 1.\n", "Para 1 line 2.\n"}},
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{opPara, []string{"Para 2.\n"}},
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{opHead, []string{"Section"}},
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{opPara, []string{"Para 3.\n"}},
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{opPre, []string{"pre\n", "pre1\n"}},
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{opPara, []string{"Para 4.\n"}},
|
||||
{opPre, []string{"pre\n", "pre1\n", "\n", "pre2\n"}},
|
||||
{opPara, []string{"Para 5.\n"}},
|
||||
{opPre, []string{"pre\n", "\n", "\n", "pre1\n", "pre2\n"}},
|
||||
{opPara, []string{"Para 6.\n"}},
|
||||
{opPre, []string{"pre\n", "pre2\n"}},
|
||||
},
|
||||
text: `. Para 1. Para 1 line 2.
|
||||
|
||||
. Para 2.
|
||||
|
||||
|
||||
. Section
|
||||
|
||||
. Para 3.
|
||||
|
||||
$ pre
|
||||
$ pre1
|
||||
|
||||
. Para 4.
|
||||
|
||||
$ pre
|
||||
$ pre1
|
||||
|
||||
$ pre2
|
||||
|
||||
. Para 5.
|
||||
|
||||
$ pre
|
||||
|
||||
|
||||
$ pre1
|
||||
$ pre2
|
||||
|
||||
. Para 6.
|
||||
|
||||
$ pre
|
||||
$ pre2
|
||||
`,
|
||||
},
|
||||
{
|
||||
in: "Para.\n\tshould not be ``escaped''",
|
||||
out: []block{
|
||||
{opPara, []string{"Para.\n"}},
|
||||
{opPre, []string{"should not be ``escaped''"}},
|
||||
},
|
||||
text: ". Para.\n\n$ should not be ``escaped''",
|
||||
},
|
||||
{
|
||||
in: "// A very long line of 46 char for line wrapping.",
|
||||
out: []block{
|
||||
{opPara, []string{"// A very long line of 46 char for line wrapping."}},
|
||||
},
|
||||
text: `. // A very long line of 46 char for line
|
||||
. // wrapping.
|
||||
`,
|
||||
},
|
||||
{
|
||||
in: `/* A very long line of 46 char for line wrapping.
|
||||
A very long line of 46 char for line wrapping. */`,
|
||||
out: []block{
|
||||
{opPara, []string{"/* A very long line of 46 char for line wrapping.\n", "A very long line of 46 char for line wrapping. */"}},
|
||||
},
|
||||
text: `. /* A very long line of 46 char for line
|
||||
. wrapping. A very long line of 46 char
|
||||
. for line wrapping. */
|
||||
`,
|
||||
},
|
||||
}
|
||||
|
||||
func TestBlocks(t *testing.T) {
|
||||
for i, tt := range blocksTests {
|
||||
b := blocks(tt.in)
|
||||
if !reflect.DeepEqual(b, tt.out) {
|
||||
t.Errorf("#%d: mismatch\nhave: %v\nwant: %v", i, b, tt.out)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// This has been modified from go/doc to use markdown links instead of html ones
|
||||
// and use markdown escaping instead oh html
|
||||
var emphasizeTests = []struct {
|
||||
in, out string
|
||||
}{
|
||||
{"", ""},
|
||||
{"http://[::1]:8080/foo.txt", `[http\:\/\/\[\:\:1\]\:8080\/foo\.txt](http://[::1]:8080/foo.txt)`},
|
||||
{"before (https://www.google.com) after", `before \([https\:\/\/www\.google\.com](https://www.google.com)\) after`},
|
||||
{"before https://www.google.com:30/x/y/z:b::c. After", `before [https\:\/\/www\.google\.com\:30\/x\/y\/z\:b\:\:c](https://www.google.com:30/x/y/z:b::c)\. After`},
|
||||
{"http://www.google.com/path/:;!-/?query=%34b#093124", `[http\:\/\/www\.google\.com\/path\/\:\;\!\-\/\?query\=\%34b\#093124](http://www.google.com/path/:;!-/?query=%34b#093124)`},
|
||||
{"http://www.google.com/path/:;!-/?query=%34bar#093124", `[http\:\/\/www\.google\.com\/path\/\:\;\!\-\/\?query\=\%34bar\#093124](http://www.google.com/path/:;!-/?query=%34bar#093124)`},
|
||||
{"http://www.google.com/index.html! After", `[http\:\/\/www\.google\.com\/index\.html](http://www.google.com/index.html)\! After`},
|
||||
{"http://www.google.com/", `[http\:\/\/www\.google\.com\/](http://www.google.com/)`},
|
||||
{"https://www.google.com/", `[https\:\/\/www\.google\.com\/](https://www.google.com/)`},
|
||||
{"http://www.google.com/path.", `[http\:\/\/www\.google\.com\/path](http://www.google.com/path)\.`},
|
||||
{"http://en.wikipedia.org/wiki/Camellia_(cipher)", `[http\:\/\/en\.wikipedia\.org\/wiki\/Camellia\_\(cipher\)](http://en.wikipedia.org/wiki/Camellia_\(cipher\))`},
|
||||
{"(http://www.google.com/)", `\([http\:\/\/www\.google\.com\/](http://www.google.com/)\)`},
|
||||
{"http://gmail.com)", `[http\:\/\/gmail\.com](http://gmail.com)\)`},
|
||||
{"((http://gmail.com))", `\(\([http\:\/\/gmail\.com](http://gmail.com)\)\)`},
|
||||
{"http://gmail.com ((http://gmail.com)) ()", `[http\:\/\/gmail\.com](http://gmail.com) \(\([http\:\/\/gmail\.com](http://gmail.com)\)\) \(\)`},
|
||||
{"Foo bar http://example.com/ quux!", `Foo bar [http\:\/\/example\.com\/](http://example.com/) quux\!`},
|
||||
{"Hello http://example.com/%2f/ /world.", `Hello [http\:\/\/example\.com\/\%2f\/](http://example.com/%2f/) \/world\.`},
|
||||
{"Lorem http: ipsum //host/path", `Lorem http\: ipsum \/\/host\/path`},
|
||||
{"javascript://is/not/linked", `javascript\:\/\/is\/not\/linked`},
|
||||
{"http://foo", `[http\:\/\/foo](http://foo)`},
|
||||
{"art by [[https://www.example.com/person/][Person Name]]", `art by \[\[[https\:\/\/www\.example\.com\/person\/](https://www.example.com/person/)\]\[Person Name\]\]`},
|
||||
{"please visit (http://golang.org/)", `please visit \([http\:\/\/golang\.org\/](http://golang.org/)\)`},
|
||||
{"please visit http://golang.org/hello())", `please visit [http\:\/\/golang\.org\/hello\(\)](http://golang.org/hello\(\))\)`},
|
||||
{"http://git.qemu.org/?p=qemu.git;a=blob;f=qapi-schema.json;hb=HEAD", `[http\:\/\/git\.qemu\.org\/\?p\=qemu\.git\;a\=blob\;f\=qapi\-schema\.json\;hb\=HEAD](http://git.qemu.org/?p=qemu.git;a=blob;f=qapi-schema.json;hb=HEAD)`},
|
||||
{"https://foo.bar/bal/x(])", `[https\:\/\/foo\.bar\/bal\/x\(](https://foo.bar/bal/x\()\]\)`},
|
||||
{"foo [ http://bar(])", `foo \[ [http\:\/\/bar\(](http://bar\()\]\)`},
|
||||
}
|
||||
|
||||
func TestEmphasize(t *testing.T) {
|
||||
for i, tt := range emphasizeTests {
|
||||
var buf bytes.Buffer
|
||||
emphasize(&buf, tt.in, true)
|
||||
out := buf.String()
|
||||
if out != tt.out {
|
||||
t.Errorf("#%d: mismatch\nhave: %v\nwant: %v", i, out, tt.out)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestCommentEscape(t *testing.T) {
|
||||
//ldquo -> ulquo and rdquo -> urquo
|
||||
commentTests := []struct {
|
||||
in, out string
|
||||
}{
|
||||
{"typically invoked as ``go tool asm'',", "typically invoked as " + ulquo + "go tool asm" + urquo + ","},
|
||||
{"For more detail, run ``go help test'' and ``go help testflag''", "For more detail, run " + ulquo + "go help test" + urquo + " and " + ulquo + "go help testflag" + urquo}}
|
||||
for i, tt := range commentTests {
|
||||
var buf strings.Builder
|
||||
commentEscape(&buf, tt.in, true)
|
||||
out := buf.String()
|
||||
if out != tt.out {
|
||||
t.Errorf("#%d: mismatch\nhave: %q\nwant: %q", i, out, tt.out)
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user