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https://github.com/RGBCube/serenity
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LibWeb: Bring media-document loading closer to spec
There's an unfortunate hack here. We have to load the media file's data before we call `HTML::HTMLParser::the_end()` with our generated document, otherwise the media element (`<img>`/`<audio>`/`<video>`) never loads and that blocks the document's load event. The previous code path also did this, which is perhaps why the bug was never noticed.
This commit is contained in:
Sam Atkins
Andreas Kling
parent
91d82ae17a
commit
ae8e040287
1 changed files with 88 additions and 80 deletions
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@ -21,7 +21,6 @@
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#include <LibWeb/HTML/Parser/HTMLParser.h>
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#include <LibWeb/Loader/GeneratedPagesLoader.h>
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#include <LibWeb/Namespace.h>
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#include <LibWeb/Platform/ImageCodecPlugin.h>
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#include <LibWeb/XML/XMLDocumentBuilder.h>
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namespace Web {
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@ -80,38 +79,6 @@ static bool build_markdown_document(DOM::Document& document, ByteBuffer const& d
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return true;
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}
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static bool build_image_document(DOM::Document& document, ByteBuffer const& data)
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{
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auto image = Platform::ImageCodecPlugin::the().decode_image(data);
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if (!image.has_value() || image->frames.is_empty())
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return false;
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auto const& frame = image->frames[0];
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auto const& bitmap = frame.bitmap;
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if (!bitmap)
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return false;
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auto html_element = DOM::create_element(document, HTML::TagNames::html, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(document.append_child(html_element));
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auto head_element = DOM::create_element(document, HTML::TagNames::head, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(html_element->append_child(head_element));
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auto title_element = DOM::create_element(document, HTML::TagNames::title, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(head_element->append_child(title_element));
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auto basename = LexicalPath::basename(document.url().serialize_path());
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auto title_text = document.heap().allocate<DOM::Text>(document.realm(), document, MUST(String::formatted("{} [{}x{}]", basename, bitmap->width(), bitmap->height())));
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MUST(title_element->append_child(*title_text));
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auto body_element = DOM::create_element(document, HTML::TagNames::body, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(html_element->append_child(body_element));
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auto image_element = DOM::create_element(document, HTML::TagNames::img, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(image_element->set_attribute(HTML::AttributeNames::src, MUST(document.url().to_string())));
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MUST(body_element->append_child(image_element));
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return true;
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}
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static bool build_gemini_document(DOM::Document& document, ByteBuffer const& data)
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{
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StringView gemini_data { data };
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@ -148,55 +115,9 @@ bool build_xml_document(DOM::Document& document, ByteBuffer const& data, Optiona
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return !result.is_error() && !builder.has_error();
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}
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static bool build_video_document(DOM::Document& document)
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{
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auto html_element = DOM::create_element(document, HTML::TagNames::html, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(document.append_child(html_element));
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auto head_element = DOM::create_element(document, HTML::TagNames::head, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(html_element->append_child(head_element));
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auto body_element = DOM::create_element(document, HTML::TagNames::body, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(html_element->append_child(body_element));
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auto video_element = DOM::create_element(document, HTML::TagNames::video, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(video_element->set_attribute(HTML::AttributeNames::src, MUST(document.url().to_string())));
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MUST(video_element->set_attribute(HTML::AttributeNames::autoplay, String {}));
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MUST(video_element->set_attribute(HTML::AttributeNames::controls, String {}));
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MUST(body_element->append_child(video_element));
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return true;
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}
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static bool build_audio_document(DOM::Document& document)
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{
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auto html_element = DOM::create_element(document, HTML::TagNames::html, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(document.append_child(html_element));
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auto head_element = DOM::create_element(document, HTML::TagNames::head, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(html_element->append_child(head_element));
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auto body_element = DOM::create_element(document, HTML::TagNames::body, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(html_element->append_child(body_element));
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auto video_element = DOM::create_element(document, HTML::TagNames::audio, Namespace::HTML).release_value_but_fixme_should_propagate_errors();
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MUST(video_element->set_attribute(HTML::AttributeNames::src, MUST(document.url().to_string())));
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MUST(video_element->set_attribute(HTML::AttributeNames::autoplay, String {}));
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MUST(video_element->set_attribute(HTML::AttributeNames::controls, String {}));
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MUST(body_element->append_child(video_element));
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return true;
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}
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bool parse_document(DOM::Document& document, ByteBuffer const& data, [[maybe_unused]] Optional<String> content_encoding)
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{
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auto& mime_type = document.content_type();
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if (mime_type.starts_with_bytes("image/"sv))
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return build_image_document(document, data);
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if (mime_type.starts_with_bytes("video/"sv))
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return build_video_document(document);
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if (mime_type.starts_with_bytes("audio/"sv))
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return build_audio_document(document);
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if (mime_type == "text/markdown")
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return build_markdown_document(document, data);
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if (mime_type == "text/gemini")
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@ -417,6 +338,92 @@ static WebIDL::ExceptionOr<JS::NonnullGCPtr<DOM::Document>> load_text_document(H
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return document;
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}
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// https://html.spec.whatwg.org/multipage/document-lifecycle.html#navigate-media
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<DOM::Document>> load_media_document(HTML::NavigationParams& navigation_params, MimeSniff::MimeType type)
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{
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// To load a media document, given navigationParams and a string type:
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// 1. Let document be the result of creating and initializing a Document object given "html", type, and navigationParams.
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auto document = TRY(DOM::Document::create_and_initialize(DOM::Document::Type::XML, type.essence(), navigation_params));
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// 2. Set document's mode to "no-quirks".
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document->set_quirks_mode(DOM::QuirksMode::No);
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// 3. Populate with html/head/body given document.
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TRY(document->populate_with_html_head_and_body());
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// 4. Append an element host element for the media, as described below, to the body element.
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// 5. Set the appropriate attribute of the element host element, as described below, to the address of the image,
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// video, or audio resource.
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// 6. User agents may add content to the head element of document, or attributes to host element, e.g., to link
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// to a style sheet, to provide a script, to give the document a title, or to make the media autoplay.
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auto insert_title = [](auto& document, auto title) -> WebIDL::ExceptionOr<void> {
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auto title_element = TRY(DOM::create_element(document, HTML::TagNames::title, Namespace::HTML));
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TRY(document->head()->append_child(title_element));
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auto title_text = document->heap().template allocate<DOM::Text>(document->realm(), document, title);
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TRY(title_element->append_child(*title_text));
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return {};
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};
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auto url_string = document->url_string();
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if (type.is_image()) {
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auto img_element = TRY(DOM::create_element(document, HTML::TagNames::img, Namespace::HTML));
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TRY(img_element->set_attribute(HTML::AttributeNames::src, url_string));
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TRY(document->body()->append_child(img_element));
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TRY(insert_title(document, MUST(String::from_byte_string(LexicalPath::basename(url_string.to_byte_string())))));
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} else if (type.type() == "video"sv) {
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auto video_element = TRY(DOM::create_element(document, HTML::TagNames::video, Namespace::HTML));
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TRY(video_element->set_attribute(HTML::AttributeNames::src, url_string));
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TRY(video_element->set_attribute(HTML::AttributeNames::autoplay, String {}));
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TRY(video_element->set_attribute(HTML::AttributeNames::controls, String {}));
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TRY(document->body()->append_child(video_element));
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TRY(insert_title(document, MUST(String::from_byte_string(LexicalPath::basename(url_string.to_byte_string())))));
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} else if (type.type() == "audio"sv) {
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auto audio_element = TRY(DOM::create_element(document, HTML::TagNames::audio, Namespace::HTML));
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TRY(audio_element->set_attribute(HTML::AttributeNames::src, url_string));
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TRY(audio_element->set_attribute(HTML::AttributeNames::autoplay, String {}));
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TRY(audio_element->set_attribute(HTML::AttributeNames::controls, String {}));
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TRY(document->body()->append_child(audio_element));
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TRY(insert_title(document, MUST(String::from_byte_string(LexicalPath::basename(url_string.to_byte_string())))));
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} else {
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// FIXME: According to https://mimesniff.spec.whatwg.org/#audio-or-video-mime-type we might have to deal with
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// "application/ogg" and figure out whether it's audio or video.
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VERIFY_NOT_REACHED();
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}
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// FIXME: 7. Process link headers given document, navigationParams's response, and "media".
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// 8. Act as if the user agent had stopped parsing document.
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// FIXME: We should not need to force the media file to load before saying that parsing has completed!
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// However, if we don't, then we get stuck in HTMLParser::the_end() waiting for the media file to load, which
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// never happens.
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auto& realm = document->realm();
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TRY(navigation_params.response->body()->fully_read(
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realm,
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[document](auto) { HTML::HTMLParser::the_end(document); },
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[](auto) {},
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JS::NonnullGCPtr { realm.global_object() }));
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// 9. Return document.
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return document;
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// The element host element to create for the media is the element given in the table below in the second cell of
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// the row whose first cell describes the media. The appropriate attribute to set is the one given by the third cell
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// in that same row.
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// Type of media | Element for the media | Appropriate attribute
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// -------------------------------------------------------------
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// Image | img | src
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// Video | video | src
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// Audio | audio | src
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// Before any script execution occurs, the user agent must wait for scripts may run for the newly-created document to
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// be true for the Document.
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}
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// https://html.spec.whatwg.org/multipage/browsing-the-web.html#loading-a-document
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JS::GCPtr<DOM::Document> load_document(HTML::NavigationParams navigation_params)
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{
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@ -471,7 +478,8 @@ JS::GCPtr<DOM::Document> load_document(HTML::NavigationParams navigation_params)
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// -> A supported image, video, or audio type
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if (type.is_image()
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|| type.is_audio_or_video()) {
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// FIXME: Return the result of loading a media document given navigationParams and type.
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// Return the result of loading a media document given navigationParams and type.
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return load_media_document(navigation_params, type).release_value_but_fixme_should_propagate_errors();
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}
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// -> "application/pdf"
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