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Refactor markup render to fix various path problems (#34114)

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* Fix #33972
    * Use consistent path resolving for links and medias.
* No need to make the markup renders to resolve the paths, instead, the
paths are all correctly resolved in the "post process" step.
* Fix #33274
* Since 1.23, all paths starting with "/" are relative to current render
context (for example: the current repo branch)
* Introduce `/:root/path-relative-to-root`, then the path will be
rendered as relative to "ROOT_URL"
This commit is contained in:
wxiaoguang 2025-04-04 23:45:23 +08:00 • committed by GitHub
parent e8b54d9e44
commit 6cee3bfa96
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28 changed files with 239 additions and 286 deletions
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73
modules/markup/html.go
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@ -32,7 +32,6 @@ type globalVarsType struct {
comparePattern *regexp.Regexp
fullURLPattern *regexp.Regexp
emailRegex *regexp.Regexp
blackfridayExtRegex *regexp.Regexp
emojiShortCodeRegex *regexp.Regexp
issueFullPattern *regexp.Regexp
filesChangedFullPattern *regexp.Regexp
@ -74,9 +73,6 @@ var globalVars = sync.OnceValue(func() *globalVarsType {
// https://html.spec.whatwg.org/multipage/input.html#e-mail-state-(type%3Demail)
v.emailRegex = regexp.MustCompile("(?:\\s|^|\\(|\\[)([a-zA-Z0-9.!#$%&'*+\\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9]{2,}(?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+)(?:\\s|$|\\)|\\]|;|,|\\?|!|\\.(\\s|$))")
// blackfridayExtRegex is for blackfriday extensions create IDs like fn:user-content-footnote
v.blackfridayExtRegex = regexp.MustCompile(`[^:]*:user-content-`)
// emojiShortCodeRegex find emoji by alias like :smile:
v.emojiShortCodeRegex = regexp.MustCompile(`:[-+\w]+:`)
@ -94,17 +90,12 @@ var globalVars = sync.OnceValue(func() *globalVarsType {
return v
})
// IsFullURLBytes reports whether link fits valid format.
func IsFullURLBytes(link []byte) bool {
return globalVars().fullURLPattern.Match(link)
}
func IsFullURLString(link string) bool {
return globalVars().fullURLPattern.MatchString(link)
}
func IsNonEmptyRelativePath(link string) bool {
return link != "" && !IsFullURLString(link) && link[0] != '/' && link[0] != '?' && link[0] != '#'
return link != "" && !IsFullURLString(link) && link[0] != '?' && link[0] != '#'
}
// CustomLinkURLSchemes allows for additional schemes to be detected when parsing links within text
@ -316,44 +307,38 @@ func isEmojiNode(node *html.Node) bool {
}
func visitNode(ctx *RenderContext, procs []processor, node *html.Node) *html.Node {
// Add user-content- to IDs and "#" links if they don't already have them
for idx, attr := range node.Attr {
val := strings.TrimPrefix(attr.Val, "#")
notHasPrefix := !(strings.HasPrefix(val, "user-content-") || globalVars().blackfridayExtRegex.MatchString(val))
if attr.Key == "id" && notHasPrefix {
node.Attr[idx].Val = "user-content-" + attr.Val
}
if attr.Key == "href" && strings.HasPrefix(attr.Val, "#") && notHasPrefix {
node.Attr[idx].Val = "#user-content-" + val
}
}
switch node.Type {
case html.TextNode:
if node.Type == html.TextNode {
for _, proc := range procs {
proc(ctx, node) // it might add siblings
}
return node.NextSibling
}
if node.Type != html.ElementNode {
return node.NextSibling
}
case html.ElementNode:
if isEmojiNode(node) {
// TextNode emoji will be converted to `<span class="emoji">`, then the next iteration will visit the "span"
// if we don't stop it, it will go into the TextNode again and create an infinite recursion
return node.NextSibling
} else if node.Data == "code" || node.Data == "pre" {
return node.NextSibling // ignore code and pre nodes
} else if node.Data == "img" {
return visitNodeImg(ctx, node)
} else if node.Data == "video" {
return visitNodeVideo(ctx, node)
} else if node.Data == "a" {
procs = emojiProcessors // Restrict text in links to emojis
}
for n := node.FirstChild; n != nil; {
n = visitNode(ctx, procs, n)
}
default:
processNodeAttrID(node)
if isEmojiNode(node) {
// TextNode emoji will be converted to `<span class="emoji">`, then the next iteration will visit the "span"
// if we don't stop it, it will go into the TextNode again and create an infinite recursion
return node.NextSibling
} else if node.Data == "code" || node.Data == "pre" {
return node.NextSibling // ignore code and pre nodes
} else if node.Data == "img" {
return visitNodeImg(ctx, node)
} else if node.Data == "video" {
return visitNodeVideo(ctx, node)
}
if node.Data == "a" {
processNodeA(ctx, node)
// only use emoji processors for the content in the "A" tag,
// because the content there is not processable, for example: the content is a commit id or a full URL.
procs = emojiProcessors
}
for n := node.FirstChild; n != nil; {
n = visitNode(ctx, procs, n)
}
return node.NextSibling
}