mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-21 10:15:57 +08:00
94 lines
3.0 KiB
Go
94 lines
3.0 KiB
Go
// Copyright 2024 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package markup
|
|
|
|
import (
|
|
"html/template"
|
|
"net/url"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/httplib"
|
|
"code.gitea.io/gitea/modules/log"
|
|
|
|
"golang.org/x/net/html"
|
|
)
|
|
|
|
// codePreviewPattern matches "http://domain/.../{owner}/{repo}/src/commit/{commit}/{filepath}#L10-L20"
|
|
var codePreviewPattern = regexp.MustCompile(`https?://\S+/([^\s/]+)/([^\s/]+)/src/commit/([0-9a-f]{7,64})(/\S+)#(L\d+(-L\d+)?)`)
|
|
|
|
type RenderCodePreviewOptions struct {
|
|
FullURL string
|
|
OwnerName string
|
|
RepoName string
|
|
CommitID string
|
|
FilePath string
|
|
|
|
LineStart, LineStop int
|
|
}
|
|
|
|
func renderCodeBlock(ctx *RenderContext, node *html.Node) (urlPosStart, urlPosStop int, htm template.HTML, err error) {
|
|
m := codePreviewPattern.FindStringSubmatchIndex(node.Data)
|
|
if m == nil {
|
|
return 0, 0, "", nil
|
|
}
|
|
|
|
opts := RenderCodePreviewOptions{
|
|
FullURL: node.Data[m[0]:m[1]],
|
|
OwnerName: node.Data[m[2]:m[3]],
|
|
RepoName: node.Data[m[4]:m[5]],
|
|
CommitID: node.Data[m[6]:m[7]],
|
|
FilePath: node.Data[m[8]:m[9]],
|
|
}
|
|
if !httplib.IsCurrentGiteaSiteURL(ctx.Ctx, opts.FullURL) {
|
|
return 0, 0, "", nil
|
|
}
|
|
u, err := url.Parse(opts.FilePath)
|
|
if err != nil {
|
|
return 0, 0, "", err
|
|
}
|
|
opts.FilePath = strings.TrimPrefix(u.Path, "/")
|
|
|
|
lineStartStr, lineStopStr, _ := strings.Cut(node.Data[m[10]:m[11]], "-")
|
|
lineStart, _ := strconv.Atoi(strings.TrimPrefix(lineStartStr, "L"))
|
|
lineStop, _ := strconv.Atoi(strings.TrimPrefix(lineStopStr, "L"))
|
|
opts.LineStart, opts.LineStop = lineStart, lineStop
|
|
h, err := DefaultProcessorHelper.RenderRepoFileCodePreview(ctx.Ctx, opts)
|
|
return m[0], m[1], h, err
|
|
}
|
|
|
|
func codePreviewPatternProcessor(ctx *RenderContext, node *html.Node) {
|
|
nodeStop := node.NextSibling
|
|
for node != nodeStop {
|
|
if node.Type != html.TextNode {
|
|
node = node.NextSibling
|
|
continue
|
|
}
|
|
urlPosStart, urlPosEnd, h, err := renderCodeBlock(ctx, node)
|
|
if err != nil || h == "" {
|
|
if err != nil {
|
|
log.Error("Unable to render code preview: %v", err)
|
|
}
|
|
node = node.NextSibling
|
|
continue
|
|
}
|
|
next := node.NextSibling
|
|
textBefore := node.Data[:urlPosStart]
|
|
textAfter := node.Data[urlPosEnd:]
|
|
// "textBefore" could be empty if there is only a URL in the text node, then an empty node (p, or li) will be left here.
|
|
// However, the empty node can't be simply removed, because:
|
|
// 1. the following processors will still try to access it (need to double-check undefined behaviors)
|
|
// 2. the new node is inserted as "<p>{TextBefore}<div NewNode/>{TextAfter}</p>" (the parent could also be "li")
|
|
// then it is resolved as: "<p>{TextBefore}</p><div NewNode/><p>{TextAfter}</p>",
|
|
// so unless it could correctly replace the parent "p/li" node, it is very difficult to eliminate the "TextBefore" empty node.
|
|
node.Data = textBefore
|
|
node.Parent.InsertBefore(&html.Node{Type: html.RawNode, Data: string(h)}, next)
|
|
if textAfter != "" {
|
|
node.Parent.InsertBefore(&html.Node{Type: html.TextNode, Data: textAfter}, next)
|
|
}
|
|
node = next
|
|
}
|
|
}
|