Skip to content

Fix Syntax highlight for token change in added/deleted code #12238

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 6 commits into from
Jul 16, 2020
Merged

Fix Syntax highlight for token change in added/deleted code #12238

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
d0ece7f
Fix Syntax highlight for token change in added/deleted code
mrsdizzie Jul 13, 2020
5bf3714
fix lint
mrsdizzie Jul 13, 2020
eec38c1
apply fix to all diff sections. Also handle case where insert/remove …
mrsdizzie Jul 13, 2020
7c044eb
Add a test for this new code
mrsdizzie Jul 14, 2020
5d2f39b
remove comment
mrsdizzie Jul 14, 2020
2b09f99
Merge branch 'master' into fix-12235
lafriks Jul 16, 2020
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
43 changes: 40 additions & 3 deletions services/gitdiff/gitdiff.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -183,19 +183,56 @@ var (

func diffToHTML(fileName string, diffs []diffmatchpatch.Diff, lineType DiffLineType) template.HTML {
buf := bytes.NewBuffer(nil)

var addSpan bool
for i := range diffs {
switch {
case diffs[i].Type == diffmatchpatch.DiffEqual:
// Looking for the case where our 3rd party diff library previously detected a string difference
// in the middle of a span class because we highlight them first. This happens when added/deleted code
// also changes the chroma class name. If found, just move the openining span code forward into the next section
if addSpan {
diffs[i].Text = "<span class=\"" + diffs[i].Text
}
if strings.HasSuffix(diffs[i].Text, "<span class=\"") {
addSpan = true
buf.WriteString(strings.TrimSuffix(diffs[i].Text, "<span class=\""))
} else {
addSpan = false
buf.WriteString(getLineContent(diffs[i].Text))
}
case diffs[i].Type == diffmatchpatch.DiffInsert && lineType == DiffLineAdd:
if addSpan {
addSpan = false
diffs[i].Text = "<span class=\"" + diffs[i].Text
}
// Print existing closing span first before opening added-code span so it doesn't unintentionally close it
if strings.HasPrefix(diffs[i].Text, "</span>") {
buf.WriteString("</span>")
diffs[i].Text = strings.TrimPrefix(diffs[i].Text, "</span>")
}
if strings.HasSuffix(diffs[i].Text, "<span class=\"") {
addSpan = true
diffs[i].Text = strings.TrimSuffix(diffs[i].Text, "<span class=\"")
}
buf.Write(addedCodePrefix)
buf.WriteString(getLineContent(diffs[i].Text))
buf.Write(codeTagSuffix)
case diffs[i].Type == diffmatchpatch.DiffDelete && lineType == DiffLineDel:
if addSpan {
addSpan = false
diffs[i].Text = "<span class=\"" + diffs[i].Text
}
if strings.HasPrefix(diffs[i].Text, "</span>") {
buf.WriteString("</span>")
diffs[i].Text = strings.TrimPrefix(diffs[i].Text, "</span>")
}
if strings.HasSuffix(diffs[i].Text, "<span class=\"") {
addSpan = true
diffs[i].Text = strings.TrimSuffix(diffs[i].Text, "<span class=\"")
}
buf.Write(removedCodePrefix)
buf.WriteString(getLineContent(diffs[i].Text))
buf.Write(codeTagSuffix)
case diffs[i].Type == diffmatchpatch.DiffEqual:
buf.WriteString(getLineContent(diffs[i].Text))
}
}
return template.HTML(buf.Bytes())
Expand Down
8 changes: 8 additions & 0 deletions services/gitdiff/gitdiff_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,14 @@ func TestDiffToHTML(t *testing.T) {
{Type: dmp.DiffInsert, Text: " baz"},
{Type: dmp.DiffEqual, Text: " biz"},
}, DiffLineDel))

assertEqual(t, "<span class=\"k\">if</span> <span class=\"p\">!</span><span class=\"nx\">nohl</span> <span class=\"o\">&amp;&amp;</span> <span class=\"added-code\"><span class=\"p\">(</span></span><span class=\"nx\">lexer</span> <span class=\"o\">!=</span> <span class=\"kc\">nil</span><span class=\"added-code\"> <span class=\"o\">||</span> <span class=\"nx\">r</span><span class=\"p\">.</span><span class=\"nx\">GuessLanguage</span><span class=\"p\">)</span></span> <span class=\"p\">{</span>", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "<span class=\"k\">if</span> <span class=\"p\">!</span><span class=\"nx\">nohl</span> <span class=\"o\">&amp;&amp;</span> <span class=\""},
{Type: dmp.DiffInsert, Text: "p\">(</span><span class=\""},
{Type: dmp.DiffEqual, Text: "nx\">lexer</span> <span class=\"o\">!=</span> <span class=\"kc\">nil"},
{Type: dmp.DiffInsert, Text: "</span> <span class=\"o\">||</span> <span class=\"nx\">r</span><span class=\"p\">.</span><span class=\"nx\">GuessLanguage</span><span class=\"p\">)"},
{Type: dmp.DiffEqual, Text: "</span> <span class=\"p\">{</span>"},
}, DiffLineAdd))
}

func TestParsePatch(t *testing.T) {
Expand Down