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Fix error in diff html rendering (#13191)
* Fix error in diff html rendering Was missing an optional whitespace check in regex. Also noticed a rare case where diff.Type == Equal would be empty and thus get a newline attached. Fixed that too. Fixes #13177 * Update services/gitdiff/gitdiff.go Co-authored-by: zeripath <art27@cantab.net> * Update gitdiff_test.go * fmt Co-authored-by: zeripath <art27@cantab.net>
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2 changed files with 12 additions and 3 deletions
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@ -181,7 +181,7 @@ var (
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removedCodePrefix = []byte(`<span class="removed-code">`)
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codeTagSuffix = []byte(`</span>`)
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)
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var addSpanRegex = regexp.MustCompile(`<span [class="[a-z]*]*$`)
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var addSpanRegex = regexp.MustCompile(`<span\s*[a-z="]*$`)
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func diffToHTML(fileName string, diffs []diffmatchpatch.Diff, lineType DiffLineType) template.HTML {
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buf := bytes.NewBuffer(nil)
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@ -221,7 +221,7 @@ func diffToHTML(fileName string, diffs []diffmatchpatch.Diff, lineType DiffLineT
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diffs[i].Text = strings.TrimSuffix(diffs[i].Text, addSpan)
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}
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buf.Write(addedCodePrefix)
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buf.WriteString(getLineContent(diffs[i].Text))
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buf.WriteString(diffs[i].Text)
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buf.Write(codeTagSuffix)
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case diffs[i].Type == diffmatchpatch.DiffDelete && lineType == DiffLineDel:
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if len(addSpan) > 0 {
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@ -238,7 +238,7 @@ func diffToHTML(fileName string, diffs []diffmatchpatch.Diff, lineType DiffLineT
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diffs[i].Text = strings.TrimSuffix(diffs[i].Text, addSpan)
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}
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buf.Write(removedCodePrefix)
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buf.WriteString(getLineContent(diffs[i].Text))
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buf.WriteString(diffs[i].Text)
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buf.Write(codeTagSuffix)
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}
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}
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@ -74,6 +74,15 @@ func TestDiffToHTML(t *testing.T) {
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{Type: dmp.DiffInsert, Text: "lass=\"p\">,</span> <span class=\"kc\">true</span><span class=\"p\">,</span> <span class=\"nx\">attrs"},
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{Type: dmp.DiffEqual, Text: "</span><span class=\"p\">,</span> <span class=\"kc\">false</span><span class=\"p\">)</span>"},
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}, DiffLineAdd))
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assertEqual(t, "<span class=\"k\">print</span><span class=\"added-code\"></span><span class=\"added-code\"><span class=\"p\">(</span></span><span class=\"sa\"></span><span class=\"s2\">"</span><span class=\"s2\">// </span><span class=\"s2\">"</span><span class=\"p\">,</span> <span class=\"n\">sys</span><span class=\"o\">.</span><span class=\"n\">argv</span><span class=\"added-code\"><span class=\"p\">)</span></span>", diffToHTML("", []dmp.Diff{
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{Type: dmp.DiffEqual, Text: "<span class=\"k\">print</span>"},
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{Type: dmp.DiffInsert, Text: "<span"},
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{Type: dmp.DiffEqual, Text: " "},
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{Type: dmp.DiffInsert, Text: "class=\"p\">(</span>"},
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{Type: dmp.DiffEqual, Text: "<span class=\"sa\"></span><span class=\"s2\">"</span><span class=\"s2\">// </span><span class=\"s2\">"</span><span class=\"p\">,</span> <span class=\"n\">sys</span><span class=\"o\">.</span><span class=\"n\">argv</span>"},
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{Type: dmp.DiffInsert, Text: "<span class=\"p\">)</span>"},
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}, DiffLineAdd))
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}
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func TestParsePatch_singlefile(t *testing.T) {
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