HTMLLinkElement.cpp 4.1 KB

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  1. /*
  2. * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
  3. * Copyright (c) 2021, the SerenityOS developers.
  4. * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
  5. *
  6. * SPDX-License-Identifier: BSD-2-Clause
  7. */
  8. #include <AK/ByteBuffer.h>
  9. #include <AK/Debug.h>
  10. #include <AK/URL.h>
  11. #include <LibWeb/CSS/Parser/Parser.h>
  12. #include <LibWeb/DOM/Document.h>
  13. #include <LibWeb/HTML/HTMLLinkElement.h>
  14. #include <LibWeb/Loader/ResourceLoader.h>
  15. namespace Web::HTML {
  16. HTMLLinkElement::HTMLLinkElement(DOM::Document& document, DOM::QualifiedName qualified_name)
  17. : HTMLElement(document, move(qualified_name))
  18. {
  19. }
  20. HTMLLinkElement::~HTMLLinkElement() = default;
  21. void HTMLLinkElement::inserted()
  22. {
  23. HTMLElement::inserted();
  24. if (m_relationship & Relationship::Stylesheet && !(m_relationship & Relationship::Alternate)) {
  25. auto url = document().parse_url(href());
  26. dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Loading import URL: {}", url);
  27. auto request = LoadRequest::create_for_url_on_page(url, document().page());
  28. // NOTE: Mark this element as delaying the document load event *before* calling set_resource()
  29. // as it may trigger a synchronous resource_did_load() callback.
  30. m_document_load_event_delayer.emplace(document());
  31. set_resource(ResourceLoader::the().load_resource(Resource::Type::Generic, request));
  32. // NOTE: If we ended up not loading a resource for whatever reason, don't delay the load event.
  33. if (!resource())
  34. m_document_load_event_delayer.clear();
  35. }
  36. if (m_relationship & Relationship::Preload) {
  37. // FIXME: Respect the "as" attribute.
  38. LoadRequest request;
  39. request.set_url(document().parse_url(attribute(HTML::AttributeNames::href)));
  40. m_preload_resource = ResourceLoader::the().load_resource(Resource::Type::Generic, request);
  41. } else if (m_relationship & Relationship::DNSPrefetch) {
  42. ResourceLoader::the().prefetch_dns(document().parse_url(attribute(HTML::AttributeNames::href)));
  43. } else if (m_relationship & Relationship::Preconnect) {
  44. ResourceLoader::the().preconnect(document().parse_url(attribute(HTML::AttributeNames::href)));
  45. }
  46. }
  47. void HTMLLinkElement::parse_attribute(const FlyString& name, const String& value)
  48. {
  49. if (name == HTML::AttributeNames::rel) {
  50. m_relationship = 0;
  51. auto parts = value.split_view(' ');
  52. for (auto& part : parts) {
  53. if (part == "stylesheet"sv)
  54. m_relationship |= Relationship::Stylesheet;
  55. else if (part == "alternate"sv)
  56. m_relationship |= Relationship::Alternate;
  57. else if (part == "preload"sv)
  58. m_relationship |= Relationship::Preload;
  59. else if (part == "dns-prefetch"sv)
  60. m_relationship |= Relationship::DNSPrefetch;
  61. else if (part == "preconnect"sv)
  62. m_relationship |= Relationship::Preconnect;
  63. }
  64. }
  65. }
  66. void HTMLLinkElement::resource_did_fail()
  67. {
  68. dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Resource did fail. URL: {}", resource()->url());
  69. m_document_load_event_delayer.clear();
  70. }
  71. void HTMLLinkElement::resource_did_load()
  72. {
  73. VERIFY(resource());
  74. m_document_load_event_delayer.clear();
  75. if (!resource()->has_encoded_data()) {
  76. dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Resource did load, no encoded data. URL: {}", resource()->url());
  77. } else {
  78. dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Resource did load, has encoded data. URL: {}", resource()->url());
  79. if (resource()->mime_type() != "text/css"sv) {
  80. dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Resource did load, but MIME type was {} instead of text/css. URL: {}", resource()->mime_type(), resource()->url());
  81. return;
  82. }
  83. }
  84. auto sheet = parse_css(CSS::ParsingContext(document(), resource()->url()), resource()->encoded_data());
  85. if (!sheet) {
  86. dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Failed to parse stylesheet: {}", resource()->url());
  87. return;
  88. }
  89. sheet->set_owner_node(this);
  90. document().style_sheets().add_sheet(sheet.release_nonnull());
  91. }
  92. }