CSSSupportsRule.cpp 1.7 KB

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  1. /*
  2. * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
  3. *
  4. * SPDX-License-Identifier: BSD-2-Clause
  5. */
  6. #include <LibWeb/Bindings/CSSSupportsRulePrototype.h>
  7. #include <LibWeb/Bindings/Intrinsics.h>
  8. #include <LibWeb/CSS/CSSSupportsRule.h>
  9. #include <LibWeb/CSS/Parser/Parser.h>
  10. namespace Web::CSS {
  11. CSSSupportsRule* CSSSupportsRule::create(JS::Realm& realm, NonnullRefPtr<Supports>&& supports, CSSRuleList& rules)
  12. {
  13. return realm.heap().allocate<CSSSupportsRule>(realm, realm, move(supports), rules);
  14. }
  15. CSSSupportsRule::CSSSupportsRule(JS::Realm& realm, NonnullRefPtr<Supports>&& supports, CSSRuleList& rules)
  16. : CSSConditionRule(realm, rules)
  17. , m_supports(move(supports))
  18. {
  19. set_prototype(&Bindings::ensure_web_prototype<Bindings::CSSSupportsRulePrototype>(realm, "CSSSupportsRule"));
  20. }
  21. DeprecatedString CSSSupportsRule::condition_text() const
  22. {
  23. return m_supports->to_deprecated_string();
  24. }
  25. void CSSSupportsRule::set_condition_text(DeprecatedString text)
  26. {
  27. if (auto new_supports = parse_css_supports({}, text))
  28. m_supports = new_supports.release_nonnull();
  29. }
  30. // https://www.w3.org/TR/cssom-1/#serialize-a-css-rule
  31. DeprecatedString CSSSupportsRule::serialized() const
  32. {
  33. // Note: The spec doesn't cover this yet, so I'm roughly following the spec for the @media rule.
  34. // It should be pretty close!
  35. StringBuilder builder;
  36. builder.append("@supports "sv);
  37. builder.append(condition_text());
  38. builder.append(" {\n"sv);
  39. for (size_t i = 0; i < css_rules().length(); i++) {
  40. auto rule = css_rules().item(i);
  41. if (i != 0)
  42. builder.append("\n"sv);
  43. builder.append(" "sv);
  44. builder.append(rule->css_text());
  45. }
  46. builder.append("\n}"sv);
  47. return builder.to_deprecated_string();
  48. }
  49. }