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enhance(emoji): update to Unicode 17, unify and lazy-load emoji data (#39363)
Generate emoji data from Unicode 17's `emoji-test.txt`, keeping existing aliases. `public/assets/emoji.json` is now the single emoji data file, also loaded by the backend. Rendered emoji drop their `aria-label`, the dark theme inverts key on a new `data-alias` attribute instead. Skin tone variants and their Gitea-only aliases are removed, GitHub has none either. Emoji autocompletion is now lazy-loaded with the markdown editor, shrinking the index JS chunk from 653KB to 563KB. --------- Signed-off-by: silverwind <me@silverwind.io> Signed-off-by: wxiaoguang <wxiaoguang@gmail.com> Co-authored-by: wxiaoguang <wxiaoguang@gmail.com> Co-authored-by: bircni <bircni@icloud.com>
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@@ -34,6 +34,9 @@ func (st *Sanitizer) createDefaultPolicy() *bluemonday.Policy {
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// Line numbers on codepreview
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policy.AllowAttrs("data-line-number").OnElements("span")
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// emoji aliases for dark theme inversion
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policy.AllowAttrs("data-alias").OnElements("span")
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// HINT: CUSTOM-URL-SCHEMES-ALLOW: setting custom means also allow them besides http/https, no custom means "allow all"
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if len(setting.Markdown.CustomURLSchemes) > 0 {
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policy.AllowURLSchemes(setting.Markdown.CustomURLSchemes...)
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