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>tokarchuk/v1.17
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				@ -1,52 +1,97 @@ | 
				
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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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		<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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					{{if or (eq $line.GetExpandDirection 3) (eq $line.GetExpandDirection 5) }} | 
				
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						<a role="button" class="blob-excerpt" data-url="{{$.root.RepoLink}}/blob_excerpt/{{$.root.AfterCommitID}}" data-query="{{$line.GetBlobExcerptQuery}}&style=split&direction=down" data-anchor="diff-{{Sha1 $file.Name}}K{{$line.SectionInfo.RightIdx}}"> | 
				
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							{{svg "octicon-fold-down"}} | 
				
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						</a> | 
				
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					{{end}} | 
				
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					{{if or (eq $line.GetExpandDirection 3) (eq $line.GetExpandDirection 4) }} | 
				
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						<a role="button" class="blob-excerpt" data-url="{{$.root.RepoLink}}/blob_excerpt/{{$.root.AfterCommitID}}" data-query="{{$line.GetBlobExcerptQuery}}&style=split&direction=up" data-anchor="diff-{{Sha1 $file.Name}}K{{$line.SectionInfo.RightIdx}}"> | 
				
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							{{svg "octicon-fold-up"}} | 
				
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						</a> | 
				
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					{{end}} | 
				
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					{{if eq $line.GetExpandDirection 2}} | 
				
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						<a role="button" class="blob-excerpt" data-url="{{$.root.RepoLink}}/blob_excerpt/{{$.root.AfterCommitID}}" data-query="{{$line.GetBlobExcerptQuery}}&style=split&direction=" data-anchor="diff-{{Sha1 $file.Name}}K{{$line.SectionInfo.RightIdx}}"> | 
				
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							{{svg "octicon-fold"}} | 
				
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						</a> | 
				
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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}} | 
				
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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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				<td class="lines-code lines-code-old halfwidth">{{if and $.root.SignedUserID $.root.PageIsPullFiles (not (eq .GetType 2))}}<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" data-line-num="{{if $line.RightIdx}}{{$line.RightIdx}}{{end}}"><span rel="{{if $line.RightIdx}}diff-{{Sha1 $file.Name}}R{{$line.RightIdx}}{{end}}"></span></td> | 
				
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				<td class="lines-type-marker lines-type-marker-new">{{if $line.RightIdx}}<span class="mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span>{{end}}</td> | 
				
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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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			<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 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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				</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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				</td> | 
				
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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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						{{if or (eq $line.GetExpandDirection 3) (eq $line.GetExpandDirection 5) }} | 
				
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							<a role="button" class="blob-excerpt" data-url="{{$.root.RepoLink}}/blob_excerpt/{{$.root.AfterCommitID}}" data-query="{{$line.GetBlobExcerptQuery}}&style=split&direction=down" data-anchor="diff-{{Sha1 $file.Name}}K{{$line.SectionInfo.RightIdx}}"> | 
				
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								{{svg "octicon-fold-down"}} | 
				
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							</a> | 
				
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						{{end}} | 
				
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						{{if or (eq $line.GetExpandDirection 3) (eq $line.GetExpandDirection 4) }} | 
				
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							<a role="button" class="blob-excerpt" data-url="{{$.root.RepoLink}}/blob_excerpt/{{$.root.AfterCommitID}}" data-query="{{$line.GetBlobExcerptQuery}}&style=split&direction=up" data-anchor="diff-{{Sha1 $file.Name}}K{{$line.SectionInfo.RightIdx}}"> | 
				
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								{{svg "octicon-fold-up"}} | 
				
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							</a> | 
				
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						{{end}} | 
				
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						{{if eq $line.GetExpandDirection 2}} | 
				
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							<a role="button" class="blob-excerpt" data-url="{{$.root.RepoLink}}/blob_excerpt/{{$.root.AfterCommitID}}" data-query="{{$line.GetBlobExcerptQuery}}&style=split&direction=" data-anchor="diff-{{Sha1 $file.Name}}K{{$line.SectionInfo.RightIdx}}"> | 
				
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								{{svg "octicon-fold"}} | 
				
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							</a> | 
				
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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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					<td class="lines-code lines-code-old halfwidth">{{if and $.root.SignedUserID $.root.PageIsPullFiles (not (eq .GetType 2))}}<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" data-line-num="{{if $line.RightIdx}}{{$line.RightIdx}}{{end}}"><span rel="{{if $line.RightIdx}}diff-{{Sha1 $file.Name}}R{{$line.RightIdx}}{{end}}"></span></td> | 
				
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					<td class="lines-type-marker lines-type-marker-new">{{if $line.RightIdx}}<span class="mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span>{{end}}</td> | 
				
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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 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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					<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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					</td> | 
				
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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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 | 
				
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