Simplify split diff view generation and remove JS dependency (#16775)
Gitea has relied on some slow JS code to match up added and deleted lines on the diff pages. This can cause a considerable slow down on large diff pages. This PR makes a small change meaning that the matching up can occur much more simply. Partial fix #1351 Signed-off-by: Andrew Thornton <art27@cantab.net>
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@ -83,6 +83,7 @@ func TestGetDiffPreview(t *testing.T) {
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{
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LeftIdx: 3,
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RightIdx: 0,
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Match: 4,
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Type: 3,
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Content: "-Description for repo1",
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Comments: nil,
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@ -90,6 +91,7 @@ func TestGetDiffPreview(t *testing.T) {
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{
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LeftIdx: 0,
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RightIdx: 3,
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Match: 3,
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Type: 2,
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Content: "+Description for repo1",
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Comments: nil,
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@ -97,6 +99,7 @@ func TestGetDiffPreview(t *testing.T) {
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{
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LeftIdx: 0,
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RightIdx: 4,
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Match: -1,
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Type: 2,
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Content: "+this is a new line",
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Comments: nil,
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@ -75,6 +75,7 @@ const (
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type DiffLine struct {
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LeftIdx int
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RightIdx int
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Match int
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Type DiffLineType
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Content string
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Comments []*models.Comment
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@ -943,6 +944,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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curFileLFSPrefix bool
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)
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lastLeftIdx := -1
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leftLine, rightLine := 1, 1
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for {
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@ -1027,13 +1029,21 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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curFile.IsIncomplete = true
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continue
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}
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diffLine := &DiffLine{Type: DiffLineAdd, RightIdx: rightLine}
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diffLine := &DiffLine{Type: DiffLineAdd, RightIdx: rightLine, Match: -1}
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rightLine++
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if curSection == nil {
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// Create a new section to represent this hunk
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curSection = &DiffSection{}
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curFile.Sections = append(curFile.Sections, curSection)
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}
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if lastLeftIdx > -1 {
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diffLine.Match = lastLeftIdx
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curSection.Lines[lastLeftIdx].Match = len(curSection.Lines)
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lastLeftIdx++
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if lastLeftIdx >= len(curSection.Lines) || curSection.Lines[lastLeftIdx].Type != DiffLineDel {
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lastLeftIdx = -1
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}
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}
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curSection.Lines = append(curSection.Lines, diffLine)
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case '-':
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curFileLinesCount++
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@ -1042,7 +1052,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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curFile.IsIncomplete = true
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continue
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}
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diffLine := &DiffLine{Type: DiffLineDel, LeftIdx: leftLine}
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diffLine := &DiffLine{Type: DiffLineDel, LeftIdx: leftLine, Match: -1}
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if leftLine > 0 {
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leftLine++
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}
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@ -1051,6 +1061,9 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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curSection = &DiffSection{}
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curFile.Sections = append(curFile.Sections, curSection)
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}
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if len(curSection.Lines) == 0 || curSection.Lines[len(curSection.Lines)-1].Type != DiffLineDel {
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lastLeftIdx = len(curSection.Lines)
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}
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curSection.Lines = append(curSection.Lines, diffLine)
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case ' ':
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curFileLinesCount++
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@ -1061,6 +1074,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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diffLine := &DiffLine{Type: DiffLinePlain, LeftIdx: leftLine, RightIdx: rightLine}
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leftLine++
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rightLine++
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lastLeftIdx = -1
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if curSection == nil {
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// Create a new section to represent this hunk
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curSection = &DiffSection{}
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@ -154,33 +154,5 @@
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{{end}}
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{{template "repo/issue/view_content/reference_issue_dialog" .}}
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{{if .IsSplitStyle}}
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<script>
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document.addEventListener('DOMContentLoaded', () => {
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$('tr.add-code').each(function() {
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let prev = $(this).prev();
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if (prev.is('.del-code') && prev.children().eq(5).text().trim() === '') {
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while (prev.prev().is('.del-code') && prev.prev().children().eq(5).text().trim() === '') {
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prev = prev.prev();
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}
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prev.children().eq(3).attr('data-line-num', $(this).children().eq(3).attr('data-line-num'));
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prev.children().eq(3).html($(this).children().eq(3).html());
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prev.children().eq(4).html($(this).children().eq(4).html());
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prev.children().eq(5).html($(this).children().eq(5).html());
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prev.children().eq(0).addClass('del-code');
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prev.children().eq(1).addClass('del-code');
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prev.children().eq(2).addClass('del-code');
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prev.children().eq(3).addClass('add-code');
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prev.children().eq(4).addClass('add-code');
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prev.children().eq(5).addClass('add-code');
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$(this).remove();
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}
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});
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});
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</script>
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{{end}}
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</div>
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{{end}}
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@ -1,6 +1,8 @@
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{{$file := .file}}
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{{range $j, $section := $file.Sections}}
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{{range $k, $line := $section.Lines}}
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{{$hasmatch := ne $line.Match -1}}
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{{if or (ne .GetType 2) (not $hasmatch)}}
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<tr class="{{DiffLineTypeToStr .GetType}}-code nl-{{$k}} ol-{{$k}}" data-line-type="{{DiffLineTypeToStr .GetType}}">
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{{if eq .GetType 4}}
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<td class="lines-num lines-num-old">
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@ -21,6 +23,14 @@
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{{end}}
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</td>
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<td colspan="5" class="lines-code lines-code-old "><code class="code-inner">{{$section.GetComputedInlineDiffFor $line}}</span></td>
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{{else if and (eq .GetType 3) $hasmatch}}{{/* DEL */}}
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{{$match := index $section.Lines $line.Match}}
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<td class="lines-num lines-num-old del-code" data-line-num="{{$line.LeftIdx}}"><span rel="diff-{{Sha1 $file.Name}}L{{$line.LeftIdx}}"></span></td>
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<td class="lines-type-marker lines-type-marker-old del-code"><span class="mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span></td>
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<td class="lines-code lines-code-old halfwidth del-code">{{if and $.root.SignedUserID $.root.PageIsPullFiles}}<a class="ui primary button add-code-comment add-code-comment-left{{if (not $line.CanComment)}} invisible{{end}}" data-path="{{$file.Name}}" data-side="left" data-idx="{{$line.LeftIdx}}" data-new-comment-url="{{$.root.Issue.HTMLURL}}/files/reviews/new_comment">{{svg "octicon-plus"}}</a>{{end}}<code class="code-inner">{{if $line.LeftIdx}}{{$section.GetComputedInlineDiffFor $line}}{{end}}</code></td>
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<td class="lines-num lines-num-new add-code" data-line-num="{{if $match.RightIdx}}{{$match.RightIdx}}{{end}}"><span rel="{{if $match.RightIdx}}diff-{{Sha1 $file.Name}}R{{$match.RightIdx}}{{end}}"></span></td>
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<td class="lines-type-marker lines-type-marker-new add-code">{{if $match.RightIdx}}<span class="mono" data-type-marker="{{$match.GetLineTypeMarker}}"></span>{{end}}</td>
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<td class="lines-code lines-code-new halfwidth add-code">{{if and $.root.SignedUserID $.root.PageIsPullFiles}}<a class="ui primary button add-code-comment add-code-comment-right{{if (not $match.CanComment)}} invisible{{end}}" data-path="{{$file.Name}}" data-side="right" data-idx="{{$match.RightIdx}}" data-new-comment-url="{{$.root.Issue.HTMLURL}}/files/reviews/new_comment">{{svg "octicon-plus"}}</a>{{end}}<code class="code-inner">{{if $match.RightIdx}}{{$section.GetComputedInlineDiffFor $match}}{{end}}</code></td>
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{{else}}
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<td class="lines-num lines-num-old" data-line-num="{{if $line.LeftIdx}}{{$line.LeftIdx}}{{end}}"><span rel="{{if $line.LeftIdx}}diff-{{Sha1 $file.Name}}L{{$line.LeftIdx}}{{end}}"></span></td>
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<td class="lines-type-marker lines-type-marker-old">{{if $line.LeftIdx}}<span class="mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span>{{end}}</td>
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@ -30,14 +40,48 @@
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<td class="lines-code lines-code-new halfwidth">{{if and $.root.SignedUserID $.root.PageIsPullFiles (not (eq .GetType 3))}}<a class="ui primary button add-code-comment add-code-comment-right{{if (not $line.CanComment)}} invisible{{end}}" data-path="{{$file.Name}}" data-side="right" data-idx="{{$line.RightIdx}}" data-new-comment-url="{{$.root.Issue.HTMLURL}}/files/reviews/new_comment">{{svg "octicon-plus"}}</a>{{end}}<code class="code-inner">{{if $line.RightIdx}}{{$section.GetComputedInlineDiffFor $line}}{{end}}</code></td>
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{{end}}
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</tr>
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{{if gt (len $line.Comments) 0}}
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{{if and (eq .GetType 3) $hasmatch}}
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{{$match := index $section.Lines $line.Match}}
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{{if or (gt (len $line.Comments) 0) (gt (len $match.Comments) 0)}}
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<tr class="add-comment" data-line-type="{{DiffLineTypeToStr .GetType}}">
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<td class="lines-num"></td>
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<td class="lines-type-marker"></td>
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<td class="add-comment-left">
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{{if gt (len $line.Comments) 0}}
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{{if eq $line.GetCommentSide "previous"}}
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{{template "repo/diff/conversation" mergeinto $.root "comments" $line.Comments}}
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{{end}}
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{{end}}
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{{if gt (len $match.Comments) 0}}
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{{if eq $match.GetCommentSide "previous"}}
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{{template "repo/diff/conversation" mergeinto $.root "comments" $match.Comments}}
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{{end}}
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{{end}}
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</td>
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<td class="lines-num"></td>
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<td class="lines-type-marker"></td>
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<td class="add-comment-right">
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{{if eq $line.GetCommentSide "proposed"}}
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{{template "repo/diff/conversation" mergeinto $.root "comments" $line.Comments}}
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{{end}}
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{{if gt (len $match.Comments) 0}}
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{{if eq $match.GetCommentSide "proposed"}}
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{{template "repo/diff/conversation" mergeinto $.root "comments" $match.Comments}}
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{{end}}
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{{end}}
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</td>
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</tr>
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{{end}}
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{{else if gt (len $line.Comments) 0}}
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<tr class="add-comment" data-line-type="{{DiffLineTypeToStr .GetType}}">
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<td class="lines-num"></td>
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<td class="lines-type-marker"></td>
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<td class="add-comment-left">
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{{if gt (len $line.Comments) 0}}
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{{if eq $line.GetCommentSide "previous"}}
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{{template "repo/diff/conversation" mergeinto $.root "comments" $line.Comments}}
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{{end}}
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{{end}}
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</td>
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<td class="lines-num"></td>
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<td class="lines-type-marker"></td>
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@ -49,4 +93,5 @@
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</tr>
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{{end}}
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{{end}}
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{{end}}
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{{end}}
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