diff --git a/modules/markup/html.go b/modules/markup/html.go
index b7291823b..2501f8062 100644
--- a/modules/markup/html.go
+++ b/modules/markup/html.go
@@ -10,10 +10,12 @@ import (
"path"
"path/filepath"
"regexp"
+ "strconv"
"strings"
"sync"
"code.gitea.io/gitea/modules/base"
+ "code.gitea.io/gitea/modules/charset"
"code.gitea.io/gitea/modules/emoji"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
@@ -61,6 +63,9 @@ var (
validLinksPattern = regexp.MustCompile(`^[a-z][\w-]+://`)
+ // filePreviewPattern matches "http://domain/org/repo/src/commit/COMMIT/filepath#L1-L2"
+ filePreviewPattern = regexp.MustCompile(`https?://((?:\S+/){3})src/commit/([0-9a-f]{7,64})/(\S+)#(L\d+(?:-L\d+)?)`)
+
// While this email regex is definitely not perfect and I'm sure you can come up
// with edge cases, it is still accepted by the CommonMark specification, as
// well as the HTML5 spec:
@@ -171,6 +176,7 @@ type processor func(ctx *RenderContext, node *html.Node)
var defaultProcessors = []processor{
fullIssuePatternProcessor,
comparePatternProcessor,
+ filePreviewPatternProcessor,
fullHashPatternProcessor,
shortLinkProcessor,
linkProcessor,
@@ -1054,6 +1060,267 @@ func comparePatternProcessor(ctx *RenderContext, node *html.Node) {
}
}
+func filePreviewPatternProcessor(ctx *RenderContext, node *html.Node) {
+ if ctx.Metas == nil {
+ return
+ }
+ if DefaultProcessorHelper.GetRepoFileContent == nil || DefaultProcessorHelper.GetLocale == nil {
+ return
+ }
+
+ next := node.NextSibling
+ for node != nil && node != next {
+ m := filePreviewPattern.FindStringSubmatchIndex(node.Data)
+ if m == nil {
+ return
+ }
+
+ // Ensure that every group (m[0]...m[9]) has a match
+ for i := 0; i < 10; i++ {
+ if m[i] == -1 {
+ return
+ }
+ }
+
+ urlFull := node.Data[m[0]:m[1]]
+
+ // Ensure that we only use links to local repositories
+ if !strings.HasPrefix(urlFull, setting.AppURL+setting.AppSubURL) {
+ return
+ }
+
+ projPath := node.Data[m[2]:m[3]]
+ projPath = strings.TrimSuffix(projPath, "/")
+
+ commitSha := node.Data[m[4]:m[5]]
+ filePath := node.Data[m[6]:m[7]]
+ hash := node.Data[m[8]:m[9]]
+
+ start := m[0]
+ end := m[1]
+
+ // If url ends in '.', it's very likely that it is not part of the
+ // actual url but used to finish a sentence.
+ if strings.HasSuffix(urlFull, ".") {
+ end--
+ urlFull = urlFull[:len(urlFull)-1]
+ hash = hash[:len(hash)-1]
+ }
+
+ projPathSegments := strings.Split(projPath, "/")
+ fileContent, err := DefaultProcessorHelper.GetRepoFileContent(
+ ctx.Ctx,
+ projPathSegments[len(projPathSegments)-2],
+ projPathSegments[len(projPathSegments)-1],
+ commitSha, filePath,
+ )
+ if err != nil {
+ return
+ }
+
+ lineSpecs := strings.Split(hash, "-")
+ lineCount := len(fileContent)
+
+ var subTitle string
+ var lineOffset int
+
+ if len(lineSpecs) == 1 {
+ line, _ := strconv.Atoi(strings.TrimPrefix(lineSpecs[0], "L"))
+ if line < 1 || line > lineCount {
+ return
+ }
+
+ fileContent = fileContent[line-1 : line]
+ subTitle = "Line " + strconv.Itoa(line)
+
+ lineOffset = line - 1
+ } else {
+ startLine, _ := strconv.Atoi(strings.TrimPrefix(lineSpecs[0], "L"))
+ endLine, _ := strconv.Atoi(strings.TrimPrefix(lineSpecs[1], "L"))
+
+ if startLine < 1 || endLine < 1 || startLine > lineCount || endLine > lineCount || endLine < startLine {
+ return
+ }
+
+ fileContent = fileContent[startLine-1 : endLine]
+ subTitle = "Lines " + strconv.Itoa(startLine) + " to " + strconv.Itoa(endLine)
+
+ lineOffset = startLine - 1
+ }
+
+ table := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Table.String(),
+ Attr: []html.Attribute{{Key: "class", Val: "file-preview"}},
+ }
+ tbody := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Tbody.String(),
+ }
+
+ locale, err := DefaultProcessorHelper.GetLocale(ctx.Ctx)
+ if err != nil {
+ log.Error("Unable to get locale. Error: %v", err)
+ return
+ }
+
+ status := &charset.EscapeStatus{}
+ statuses := make([]*charset.EscapeStatus, len(fileContent))
+ for i, line := range fileContent {
+ statuses[i], fileContent[i] = charset.EscapeControlHTML(line, locale, charset.FileviewContext)
+ status = status.Or(statuses[i])
+ }
+
+ for idx, code := range fileContent {
+ tr := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Tr.String(),
+ }
+
+ lineNum := strconv.Itoa(lineOffset + idx + 1)
+
+ tdLinesnum := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Td.String(),
+ Attr: []html.Attribute{
+ {Key: "id", Val: "L" + lineNum},
+ {Key: "class", Val: "lines-num"},
+ },
+ }
+ spanLinesNum := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Span.String(),
+ Attr: []html.Attribute{
+ {Key: "id", Val: "L" + lineNum},
+ {Key: "data-line-number", Val: lineNum},
+ },
+ }
+ tdLinesnum.AppendChild(spanLinesNum)
+ tr.AppendChild(tdLinesnum)
+
+ if status.Escaped {
+ tdLinesEscape := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Td.String(),
+ Attr: []html.Attribute{
+ {Key: "class", Val: "lines-escape"},
+ },
+ }
+
+ if statuses[idx].Escaped {
+ btnTitle := ""
+ if statuses[idx].HasInvisible {
+ btnTitle += locale.TrString("repo.invisible_runes_line") + " "
+ }
+ if statuses[idx].HasAmbiguous {
+ btnTitle += locale.TrString("repo.ambiguous_runes_line")
+ }
+
+ escapeBtn := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Button.String(),
+ Attr: []html.Attribute{
+ {Key: "class", Val: "toggle-escape-button btn interact-bg"},
+ {Key: "title", Val: btnTitle},
+ },
+ }
+ tdLinesEscape.AppendChild(escapeBtn)
+ }
+
+ tr.AppendChild(tdLinesEscape)
+ }
+
+ tdCode := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Td.String(),
+ Attr: []html.Attribute{
+ {Key: "rel", Val: "L" + lineNum},
+ {Key: "class", Val: "lines-code chroma"},
+ },
+ }
+ codeInner := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Code.String(),
+ Attr: []html.Attribute{{Key: "class", Val: "code-inner"}},
+ }
+ codeText := &html.Node{
+ Type: html.RawNode,
+ Data: string(code),
+ }
+ codeInner.AppendChild(codeText)
+ tdCode.AppendChild(codeInner)
+ tr.AppendChild(tdCode)
+
+ tbody.AppendChild(tr)
+ }
+
+ table.AppendChild(tbody)
+
+ twrapper := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Div.String(),
+ Attr: []html.Attribute{{Key: "class", Val: "ui table"}},
+ }
+ twrapper.AppendChild(table)
+
+ header := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Div.String(),
+ Attr: []html.Attribute{{Key: "class", Val: "header"}},
+ }
+ afilepath := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.A.String(),
+ Attr: []html.Attribute{
+ {Key: "href", Val: urlFull},
+ {Key: "class", Val: "muted"},
+ },
+ }
+ afilepath.AppendChild(&html.Node{
+ Type: html.TextNode,
+ Data: filePath,
+ })
+ header.AppendChild(afilepath)
+
+ psubtitle := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Span.String(),
+ Attr: []html.Attribute{{Key: "class", Val: "text small grey"}},
+ }
+ psubtitle.AppendChild(&html.Node{
+ Type: html.TextNode,
+ Data: subTitle + " in ",
+ })
+ psubtitle.AppendChild(createLink(urlFull[m[0]:m[5]], commitSha[0:7], "text black"))
+ header.AppendChild(psubtitle)
+
+ preview := &html.Node{
+ Type: html.ElementNode,
+ Data: atom.Div.String(),
+ Attr: []html.Attribute{{Key: "class", Val: "file-preview-box"}},
+ }
+ preview.AppendChild(header)
+ preview.AppendChild(twrapper)
+
+ // Specialized version of replaceContent, so the parent paragraph element is not destroyed from our div
+ before := node.Data[:start]
+ after := node.Data[end:]
+ node.Data = before
+ nextSibling := node.NextSibling
+ node.Parent.InsertBefore(&html.Node{
+ Type: html.RawNode,
+ Data: "",
+ }, nextSibling)
+ node.Parent.InsertBefore(preview, nextSibling)
+ node.Parent.InsertBefore(&html.Node{
+ Type: html.RawNode,
+ Data: "" + after,
+ }, nextSibling)
+
+ node = node.NextSibling
+ }
+}
+
// emojiShortCodeProcessor for rendering text like :smile: into emoji
func emojiShortCodeProcessor(ctx *RenderContext, node *html.Node) {
start := 0
diff --git a/modules/markup/html_test.go b/modules/markup/html_test.go
index 132955c01..652db13e5 100644
--- a/modules/markup/html_test.go
+++ b/modules/markup/html_test.go
@@ -5,6 +5,7 @@ package markup_test
import (
"context"
+ "html/template"
"io"
"os"
"strings"
@@ -13,10 +14,12 @@ import (
"code.gitea.io/gitea/models/unittest"
"code.gitea.io/gitea/modules/emoji"
"code.gitea.io/gitea/modules/git"
+ "code.gitea.io/gitea/modules/highlight"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/markup/markdown"
"code.gitea.io/gitea/modules/setting"
+ "code.gitea.io/gitea/modules/translation"
"code.gitea.io/gitea/modules/util"
"github.com/stretchr/testify/assert"
@@ -673,3 +676,57 @@ func TestIssue18471(t *testing.T) {
assert.NoError(t, err)
assert.Equal(t, "783b039...da951ce", res.String())
}
+
+func TestRender_FilePreview(t *testing.T) {
+ setting.AppURL = markup.TestAppURL
+ markup.Init(&markup.ProcessorHelper{
+ GetRepoFileContent: func(ctx context.Context, ownerName, repoName, commitSha, filePath string) ([]template.HTML, error) {
+ buf := []byte("A\nB\nC\nD\n")
+ return highlight.PlainText(buf), nil
+ },
+ GetLocale: func(ctx context.Context) (translation.Locale, error) {
+ return translation.NewLocale("en-US"), nil
+ },
+ })
+
+ sha := "b6dd6210eaebc915fd5be5579c58cce4da2e2579"
+ commitFilePreview := util.URLJoin(markup.TestRepoURL, "src", "commit", sha, "path", "to", "file.go") + "#L1-L2"
+
+ test := func(input, expected string) {
+ buffer, err := markup.RenderString(&markup.RenderContext{
+ Ctx: git.DefaultContext,
+ RelativePath: ".md",
+ Metas: localMetas,
+ }, input)
+ assert.NoError(t, err)
+ assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
+ }
+
+ test(
+ commitFilePreview,
+ `
`+
+ ``+
+ ``+
+ `
`+
+ `
`+
+ ``+
+ ``+
+ ` | `+
+ `A`+"\n"+` | `+
+ `
`+
+ ``+
+ ` | `+
+ `B`+"\n"+` | `+
+ `
`+
+ ``+
+ `
`+
+ `
`+
+ `