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refactor: render highlight language (#38793)

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Avoid CSS injection

More details are in the comment of CodeBlockAttributes
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wxiaoguang authored and GitHub committed 2026-08-06 18:07:36 +08:00
1 parent 231ba1da19
commit 6ff3a65708
17 files changed
+112 -56
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modules/highlight/highlight_test.go
+16
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@@ -216,3 +216,19 @@ func TestUnsafeSplitHighlightedLines(t *testing.T) {
assert.Equal(t, "<span>a</span>\n", string(ret[0]))
assert.Equal(t, "<span>b\n</span>", string(ret[1]))
}
func TestCodeBlockAttributes(t *testing.T) {
test := func(t *testing.T, lang string, css, attr template.HTML) {
t.Helper()
cssActual, attrActual := CodeBlockAttributes(lang)
assert.Equal(t, css, cssActual)
assert.Equal(t, attr, attrActual)
}
for _, s := range []string{"", "FALLback", "plainTEXT"} {
test(t, s, `class="code-block"`, `class="chroma language-text" data-code-language="text"`)
}
test(t, "math", `class="code-block is-loading"`, `class="chroma language-math" data-code-language="math"`)
test(t, "mermaid", `class="code-block is-loading"`, `class="chroma language-mermaid" data-code-language="mermaid"`)
test(t, "Visual Basic.NET", `class="code-block"`, `class="chroma language-visual_basic_net" data-code-language="Visual Basic.NET"`)
test(t, "c++-x", `class="code-block"`, `class="chroma language-c___x" data-code-language="c++-x"`)
}