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Fix diff blob excerpt expansion (#35922)

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And add comments and tests
This commit is contained in:
wxiaoguang 2025-11-14 12:50:48 +08:00 committed by GitHub
parent d6dc531d4b
commit 0fb3be7f0e
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3 changed files with 171 additions and 33 deletions
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17
routers/web/repo/compare.go
View File

@ -9,7 +9,6 @@ import (
"encoding/csv"
"errors"
"fmt"
"html"
"io"
"net/http"
"net/url"
@ -957,15 +956,9 @@ func ExcerptBlob(ctx *context.Context) {
ctx.HTTPError(http.StatusInternalServerError, "getExcerptLines")
return
}
if idxRight > lastRight {
lineText := " "
if rightHunkSize > 0 || leftHunkSize > 0 {
lineText = fmt.Sprintf("@@ -%d,%d +%d,%d @@\n", idxLeft, leftHunkSize, idxRight, rightHunkSize)
}
lineText = html.EscapeString(lineText)
lineSection := &gitdiff.DiffLine{
newLineSection := &gitdiff.DiffLine{
Type: gitdiff.DiffLineSection,
Content: lineText,
SectionInfo: &gitdiff.DiffLineSectionInfo{
Path: filePath,
LastLeftIdx: lastLeft,
@ -976,11 +969,13 @@ func ExcerptBlob(ctx *context.Context) {
RightHunkSize: rightHunkSize,
},
}
if newLineSection.GetExpandDirection() != "" {
newLineSection.Content = fmt.Sprintf("@@ -%d,%d +%d,%d @@\n", idxLeft, leftHunkSize, idxRight, rightHunkSize)
switch direction {
case "up":
section.Lines = append([]*gitdiff.DiffLine{lineSection}, section.Lines...)
section.Lines = append([]*gitdiff.DiffLine{newLineSection}, section.Lines...)
case "down":
section.Lines = append(section.Lines, lineSection)
section.Lines = append(section.Lines, newLineSection)
}
}

32
services/gitdiff/gitdiff.go
View File

@ -83,13 +83,33 @@ type DiffLine struct {
// DiffLineSectionInfo represents diff line section meta data
type DiffLineSectionInfo struct {
Path string
// These line "idx" are 1-based line numbers
// Left/Right refer to the left/right side of the diff:
//
// LastLeftIdx | LastRightIdx
// [up/down expander] @@ hunk info @@
// LeftIdx | RightIdx
LastLeftIdx int
LastRightIdx int
LeftIdx int
RightIdx int
// Hunk sizes of the hidden lines
LeftHunkSize int
RightHunkSize int
// For example:
// 17 | 31
// [up/down] @@ -40,23 +54,9 @@ ....
// 40 | 54
//
// In this case:
// LastLeftIdx = 17, LastRightIdx = 31
// LeftHunkSize = 23, RightHunkSize = 9
// LeftIdx = 40, RightIdx = 54
HiddenCommentIDs []int64 // IDs of hidden comments in this section
}
@ -158,13 +178,13 @@ func (d *DiffLine) getBlobExcerptQuery() string {
return query
}
func (d *DiffLine) getExpandDirection() string {
func (d *DiffLine) GetExpandDirection() string {
if d.Type != DiffLineSection || d.SectionInfo == nil || d.SectionInfo.LeftIdx-d.SectionInfo.LastLeftIdx <= 1 || d.SectionInfo.RightIdx-d.SectionInfo.LastRightIdx <= 1 {
return ""
}
if d.SectionInfo.LastLeftIdx <= 0 && d.SectionInfo.LastRightIdx <= 0 {
return "up"
} else if d.SectionInfo.RightIdx-d.SectionInfo.LastRightIdx > BlobExcerptChunkSize && d.SectionInfo.RightHunkSize > 0 {
} else if d.SectionInfo.RightIdx-d.SectionInfo.LastRightIdx-1 > BlobExcerptChunkSize && d.SectionInfo.RightHunkSize > 0 {
return "updown"
} else if d.SectionInfo.LeftHunkSize <= 0 && d.SectionInfo.RightHunkSize <= 0 {
return "down"
@ -202,13 +222,13 @@ func (d *DiffLine) RenderBlobExcerptButtons(fileNameHash string, data *DiffBlobE
content += htmlutil.HTMLFormat(`<span class="code-comment-more" data-tooltip-content="%s">%d</span>`, tooltip, len(d.SectionInfo.HiddenCommentIDs))
}
expandDirection := d.getExpandDirection()
if expandDirection == "up" || expandDirection == "updown" {
content += makeButton("up", "octicon-fold-up")
}
expandDirection := d.GetExpandDirection()
if expandDirection == "updown" || expandDirection == "down" {
content += makeButton("down", "octicon-fold-down")
}
if expandDirection == "up" || expandDirection == "updown" {
content += makeButton("up", "octicon-fold-up")
}
if expandDirection == "single" {
content += makeButton("single", "octicon-fold")
}

123
services/gitdiff/gitdiff_test.go
View File

@ -983,3 +983,126 @@ func TestDiffLine_RenderBlobExcerptButtons(t *testing.T) {
})
}
}
func TestDiffLine_GetExpandDirection(t *testing.T) {
cases := []struct {
name string
diffLine *DiffLine
direction string
}{
{
name: "NotSectionLine",
diffLine: &DiffLine{Type: DiffLineAdd, SectionInfo: &DiffLineSectionInfo{}},
direction: "",
},
{
name: "NilSectionInfo",
diffLine: &DiffLine{Type: DiffLineSection, SectionInfo: nil},
direction: "",
},
{
name: "NoHiddenLines",
// last block stops at line 100, next block starts at line 101, so no hidden lines, no expansion.
diffLine: &DiffLine{
Type: DiffLineSection,
SectionInfo: &DiffLineSectionInfo{
LastRightIdx: 100,
LastLeftIdx: 100,
RightIdx: 101,
LeftIdx: 101,
},
},
direction: "",
},
{
name: "FileHead",
diffLine: &DiffLine{
Type: DiffLineSection,
SectionInfo: &DiffLineSectionInfo{
LastRightIdx: 0, // LastXxxIdx = 0 means this is the first section in the file.
LastLeftIdx: 0,
RightIdx: 1,
LeftIdx: 1,
},
},
direction: "",
},
{
name: "FileHeadHiddenLines",
diffLine: &DiffLine{
Type: DiffLineSection,
SectionInfo: &DiffLineSectionInfo{
LastRightIdx: 0,
LastLeftIdx: 0,
RightIdx: 101,
LeftIdx: 101,
},
},
direction: "up",
},
{
name: "HiddenSingleHunk",
diffLine: &DiffLine{
Type: DiffLineSection,
SectionInfo: &DiffLineSectionInfo{
LastRightIdx: 100,
LastLeftIdx: 100,
RightIdx: 102,
LeftIdx: 102,
RightHunkSize: 1234, // non-zero dummy value
LeftHunkSize: 5678, // non-zero dummy value
},
},
direction: "single",
},
{
name: "HiddenSingleFullHunk",
// the hidden lines can exactly fit into one hunk
diffLine: &DiffLine{
Type: DiffLineSection,
SectionInfo: &DiffLineSectionInfo{
LastRightIdx: 100,
LastLeftIdx: 100,
RightIdx: 100 + BlobExcerptChunkSize + 1,
LeftIdx: 100 + BlobExcerptChunkSize + 1,
RightHunkSize: 1234, // non-zero dummy value
LeftHunkSize: 5678, // non-zero dummy value
},
},
direction: "single",
},
{
name: "HiddenUpDownHunks",
diffLine: &DiffLine{
Type: DiffLineSection,
SectionInfo: &DiffLineSectionInfo{
LastRightIdx: 100,
LastLeftIdx: 100,
RightIdx: 100 + BlobExcerptChunkSize + 2,
LeftIdx: 100 + BlobExcerptChunkSize + 2,
RightHunkSize: 1234, // non-zero dummy value
LeftHunkSize: 5678, // non-zero dummy value
},
},
direction: "updown",
},
{
name: "FileTail",
diffLine: &DiffLine{
Type: DiffLineSection,
SectionInfo: &DiffLineSectionInfo{
LastRightIdx: 100,
LastLeftIdx: 100,
RightIdx: 102,
LeftIdx: 102,
RightHunkSize: 0,
LeftHunkSize: 0,
},
},
direction: "down",
},
}
for _, c := range cases {
assert.Equal(t, c.direction, c.diffLine.GetExpandDirection(), "case %s expected direction: %s", c.name, c.direction)
}
}