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https://github.com/go-gitea/gitea.git
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6cee3bfa96
* 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"
98 lines
2.8 KiB
Go
98 lines
2.8 KiB
Go
// Copyright 2024 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package markup
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import (
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"strings"
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"golang.org/x/net/html"
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)
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func isAnchorIDUserContent(s string) bool {
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// blackfridayExtRegex is for blackfriday extensions create IDs like fn:user-content-footnote
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// old logic: blackfridayExtRegex = regexp.MustCompile(`[^:]*:user-content-`)
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return strings.HasPrefix(s, "user-content-") || strings.Contains(s, ":user-content-")
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}
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func processNodeAttrID(node *html.Node) {
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// Add user-content- to IDs and "#" links if they don't already have them,
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// and convert the link href to a relative link to the host root
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for idx, attr := range node.Attr {
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if attr.Key == "id" {
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if !isAnchorIDUserContent(attr.Val) {
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node.Attr[idx].Val = "user-content-" + attr.Val
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}
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}
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}
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}
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func processNodeA(ctx *RenderContext, node *html.Node) {
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for idx, attr := range node.Attr {
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if attr.Key == "href" {
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if anchorID, ok := strings.CutPrefix(attr.Val, "#"); ok {
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if !isAnchorIDUserContent(attr.Val) {
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node.Attr[idx].Val = "#user-content-" + anchorID
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}
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} else {
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node.Attr[idx].Val = ctx.RenderHelper.ResolveLink(attr.Val, LinkTypeDefault)
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}
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}
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}
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}
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func visitNodeImg(ctx *RenderContext, img *html.Node) (next *html.Node) {
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next = img.NextSibling
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for i, imgAttr := range img.Attr {
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if imgAttr.Key != "src" {
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continue
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}
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imgSrcOrigin := imgAttr.Val
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isLinkable := imgSrcOrigin != "" && !strings.HasPrefix(imgSrcOrigin, "data:")
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// By default, the "<img>" tag should also be clickable,
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// because frontend use `<img>` to paste the re-scaled image into the markdown,
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// so it must match the default markdown image behavior.
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cnt := 0
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for p := img.Parent; isLinkable && p != nil && cnt < 2; p = p.Parent {
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if hasParentAnchor := p.Type == html.ElementNode && p.Data == "a"; hasParentAnchor {
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isLinkable = false
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break
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}
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cnt++
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}
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if isLinkable {
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wrapper := &html.Node{Type: html.ElementNode, Data: "a", Attr: []html.Attribute{
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{Key: "href", Val: ctx.RenderHelper.ResolveLink(imgSrcOrigin, LinkTypeDefault)},
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{Key: "target", Val: "_blank"},
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}}
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parent := img.Parent
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imgNext := img.NextSibling
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parent.RemoveChild(img)
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parent.InsertBefore(wrapper, imgNext)
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wrapper.AppendChild(img)
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}
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imgAttr.Val = ctx.RenderHelper.ResolveLink(imgSrcOrigin, LinkTypeMedia)
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imgAttr.Val = camoHandleLink(imgAttr.Val)
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img.Attr[i] = imgAttr
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}
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return next
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}
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func visitNodeVideo(ctx *RenderContext, node *html.Node) (next *html.Node) {
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next = node.NextSibling
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for i, attr := range node.Attr {
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if attr.Key != "src" {
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continue
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}
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if IsNonEmptyRelativePath(attr.Val) {
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attr.Val = ctx.RenderHelper.ResolveLink(attr.Val, LinkTypeMedia)
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}
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attr.Val = camoHandleLink(attr.Val)
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node.Attr[i] = attr
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}
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return next
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}
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