mirror of
https://github.com/go-gitea/gitea
synced 2024-12-24 03:35:55 +01:00
Improve diff highlight (#3390)
- Try to reduce memory allocations - Add possibility to disable diff highlight (can improve performance for large diffs) - Tweaking with cost for prettier (cleaner) diffs - Do not calculate diff when the number of removed lines in a block is not equal to the number of added lines (this usually resulted in ugly diffs)
This commit is contained in:
parent
08c976f811
commit
2772791fda
@ -334,11 +334,13 @@ RUN_AT_START = true
|
||||
SCHEDULE = @every 24h
|
||||
|
||||
[git]
|
||||
; Max number of lines allowed of a single file in diff view.
|
||||
; Disables highlight of added and removed changes
|
||||
DISABLE_DIFF_HIGHLIGHT = false
|
||||
; Max number of lines allowed of a single file in diff view
|
||||
MAX_GIT_DIFF_LINES = 1000
|
||||
; Max number of characters of a line allowed in diff view.
|
||||
; Max number of characters of a line allowed in diff view
|
||||
MAX_GIT_DIFF_LINE_CHARACTERS = 500
|
||||
; Max number of files shown in diff view.
|
||||
; Max number of files shown in diff view
|
||||
MAX_GIT_DIFF_FILES = 100
|
||||
; Arguments for command 'git gc', e.g. "--aggressive --auto"
|
||||
; see more on http://git-scm.com/docs/git-gc/1.7.5
|
||||
|
@ -26,6 +26,7 @@ import (
|
||||
"github.com/gogits/gogs/modules/base"
|
||||
"github.com/gogits/gogs/modules/log"
|
||||
"github.com/gogits/gogs/modules/process"
|
||||
"github.com/gogits/gogs/modules/setting"
|
||||
"github.com/gogits/gogs/modules/template/highlight"
|
||||
)
|
||||
|
||||
@ -70,17 +71,18 @@ var (
|
||||
)
|
||||
|
||||
func diffToHTML(diffs []diffmatchpatch.Diff, lineType DiffLineType) template.HTML {
|
||||
var buf bytes.Buffer
|
||||
buf := bytes.NewBuffer(nil)
|
||||
for i := range diffs {
|
||||
if diffs[i].Type == diffmatchpatch.DiffInsert && lineType == DIFF_LINE_ADD {
|
||||
switch {
|
||||
case diffs[i].Type == diffmatchpatch.DiffInsert && lineType == DIFF_LINE_ADD:
|
||||
buf.Write(addedCodePrefix)
|
||||
buf.WriteString(html.EscapeString(diffs[i].Text))
|
||||
buf.Write(codeTagSuffix)
|
||||
} else if diffs[i].Type == diffmatchpatch.DiffDelete && lineType == DIFF_LINE_DEL {
|
||||
case diffs[i].Type == diffmatchpatch.DiffDelete && lineType == DIFF_LINE_DEL:
|
||||
buf.Write(removedCodePrefix)
|
||||
buf.WriteString(html.EscapeString(diffs[i].Text))
|
||||
buf.Write(codeTagSuffix)
|
||||
} else if diffs[i].Type == diffmatchpatch.DiffEqual {
|
||||
case diffs[i].Type == diffmatchpatch.DiffEqual:
|
||||
buf.WriteString(html.EscapeString(diffs[i].Text))
|
||||
}
|
||||
}
|
||||
@ -90,62 +92,86 @@ func diffToHTML(diffs []diffmatchpatch.Diff, lineType DiffLineType) template.HTM
|
||||
|
||||
// get an specific line by type (add or del) and file line number
|
||||
func (diffSection *DiffSection) GetLine(lineType DiffLineType, idx int) *DiffLine {
|
||||
difference := 0
|
||||
var (
|
||||
difference = 0
|
||||
addCount = 0
|
||||
delCount = 0
|
||||
matchDiffLine *DiffLine
|
||||
)
|
||||
|
||||
LOOP:
|
||||
for _, diffLine := range diffSection.Lines {
|
||||
if diffLine.Type == DIFF_LINE_PLAIN {
|
||||
// get the difference of line numbers between ADD and DEL versions
|
||||
switch diffLine.Type {
|
||||
case DIFF_LINE_ADD:
|
||||
addCount++
|
||||
case DIFF_LINE_DEL:
|
||||
delCount++
|
||||
default:
|
||||
if matchDiffLine != nil {
|
||||
break LOOP
|
||||
}
|
||||
difference = diffLine.RightIdx - diffLine.LeftIdx
|
||||
continue
|
||||
addCount = 0
|
||||
delCount = 0
|
||||
}
|
||||
|
||||
if lineType == DIFF_LINE_DEL {
|
||||
switch lineType {
|
||||
case DIFF_LINE_DEL:
|
||||
if diffLine.RightIdx == 0 && diffLine.LeftIdx == idx-difference {
|
||||
return diffLine
|
||||
matchDiffLine = diffLine
|
||||
}
|
||||
} else if lineType == DIFF_LINE_ADD {
|
||||
case DIFF_LINE_ADD:
|
||||
if diffLine.LeftIdx == 0 && diffLine.RightIdx == idx+difference {
|
||||
return diffLine
|
||||
matchDiffLine = diffLine
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if addCount == delCount {
|
||||
return matchDiffLine
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
var diffMatchPatch = diffmatchpatch.New()
|
||||
|
||||
func init() {
|
||||
diffMatchPatch.DiffEditCost = 100
|
||||
}
|
||||
|
||||
// computes inline diff for the given line
|
||||
func (diffSection *DiffSection) GetComputedInlineDiffFor(diffLine *DiffLine) template.HTML {
|
||||
var compareDiffLine *DiffLine
|
||||
var diff1, diff2 string
|
||||
|
||||
getDefaultReturn := func() template.HTML {
|
||||
if setting.Git.DisableDiffHighlight {
|
||||
return template.HTML(html.EscapeString(diffLine.Content[1:]))
|
||||
}
|
||||
|
||||
// just compute diff for adds and removes
|
||||
if diffLine.Type != DIFF_LINE_ADD && diffLine.Type != DIFF_LINE_DEL {
|
||||
return getDefaultReturn()
|
||||
}
|
||||
var (
|
||||
compareDiffLine *DiffLine
|
||||
diff1 string
|
||||
diff2 string
|
||||
)
|
||||
|
||||
// try to find equivalent diff line. ignore, otherwise
|
||||
if diffLine.Type == DIFF_LINE_ADD {
|
||||
switch diffLine.Type {
|
||||
case DIFF_LINE_ADD:
|
||||
compareDiffLine = diffSection.GetLine(DIFF_LINE_DEL, diffLine.RightIdx)
|
||||
if compareDiffLine == nil {
|
||||
return getDefaultReturn()
|
||||
return template.HTML(html.EscapeString(diffLine.Content[1:]))
|
||||
}
|
||||
diff1 = compareDiffLine.Content
|
||||
diff2 = diffLine.Content
|
||||
} else {
|
||||
case DIFF_LINE_DEL:
|
||||
compareDiffLine = diffSection.GetLine(DIFF_LINE_ADD, diffLine.LeftIdx)
|
||||
if compareDiffLine == nil {
|
||||
return getDefaultReturn()
|
||||
return template.HTML(html.EscapeString(diffLine.Content[1:]))
|
||||
}
|
||||
diff1 = diffLine.Content
|
||||
diff2 = compareDiffLine.Content
|
||||
default:
|
||||
return template.HTML(html.EscapeString(diffLine.Content[1:]))
|
||||
}
|
||||
|
||||
dmp := diffmatchpatch.New()
|
||||
diffRecord := dmp.DiffMain(diff1[1:], diff2[1:], true)
|
||||
diffRecord = dmp.DiffCleanupSemantic(diffRecord)
|
||||
diffRecord := diffMatchPatch.DiffMain(diff1[1:], diff2[1:], true)
|
||||
diffRecord = diffMatchPatch.DiffCleanupEfficiency(diffRecord)
|
||||
|
||||
return diffToHTML(diffRecord, diffLine.Type)
|
||||
}
|
||||
|
@ -33,38 +33,3 @@ func TestDiffToHTML(t *testing.T) {
|
||||
dmp.Diff{dmp.DiffEqual, " biz"},
|
||||
}, DIFF_LINE_DEL))
|
||||
}
|
||||
|
||||
// test if GetLine is return the correct lines
|
||||
func TestGetLine(t *testing.T) {
|
||||
ds := DiffSection{Lines: []*DiffLine{
|
||||
&DiffLine{LeftIdx: 28, RightIdx: 28, Type: DIFF_LINE_PLAIN},
|
||||
&DiffLine{LeftIdx: 29, RightIdx: 29, Type: DIFF_LINE_PLAIN},
|
||||
&DiffLine{LeftIdx: 30, RightIdx: 30, Type: DIFF_LINE_PLAIN},
|
||||
&DiffLine{LeftIdx: 31, RightIdx: 0, Type: DIFF_LINE_DEL},
|
||||
&DiffLine{LeftIdx: 0, RightIdx: 31, Type: DIFF_LINE_ADD},
|
||||
&DiffLine{LeftIdx: 0, RightIdx: 32, Type: DIFF_LINE_ADD},
|
||||
&DiffLine{LeftIdx: 32, RightIdx: 33, Type: DIFF_LINE_PLAIN},
|
||||
&DiffLine{LeftIdx: 33, RightIdx: 0, Type: DIFF_LINE_DEL},
|
||||
&DiffLine{LeftIdx: 34, RightIdx: 0, Type: DIFF_LINE_DEL},
|
||||
&DiffLine{LeftIdx: 35, RightIdx: 0, Type: DIFF_LINE_DEL},
|
||||
&DiffLine{LeftIdx: 36, RightIdx: 0, Type: DIFF_LINE_DEL},
|
||||
&DiffLine{LeftIdx: 0, RightIdx: 34, Type: DIFF_LINE_ADD},
|
||||
&DiffLine{LeftIdx: 0, RightIdx: 35, Type: DIFF_LINE_ADD},
|
||||
&DiffLine{LeftIdx: 0, RightIdx: 36, Type: DIFF_LINE_ADD},
|
||||
&DiffLine{LeftIdx: 0, RightIdx: 37, Type: DIFF_LINE_ADD},
|
||||
&DiffLine{LeftIdx: 37, RightIdx: 38, Type: DIFF_LINE_PLAIN},
|
||||
&DiffLine{LeftIdx: 38, RightIdx: 39, Type: DIFF_LINE_PLAIN},
|
||||
}}
|
||||
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_ADD, 31), ds.Lines[4])
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_DEL, 31), ds.Lines[3])
|
||||
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_ADD, 33), ds.Lines[11])
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_ADD, 34), ds.Lines[12])
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_ADD, 35), ds.Lines[13])
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_ADD, 36), ds.Lines[14])
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_DEL, 34), ds.Lines[7])
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_DEL, 35), ds.Lines[8])
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_DEL, 36), ds.Lines[9])
|
||||
assertLineEqual(t, ds.GetLine(DIFF_LINE_DEL, 37), ds.Lines[10])
|
||||
}
|
||||
|
@ -191,6 +191,7 @@ var (
|
||||
|
||||
// Git settings
|
||||
Git struct {
|
||||
DisableDiffHighlight bool
|
||||
MaxGitDiffLines int
|
||||
MaxGitDiffLineCharacters int
|
||||
MaxGitDiffFiles int
|
||||
|
Loading…
Reference in New Issue
Block a user