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695ce3763e
This change does replacement of ARIA roles that have newer synonyms. There are a number of newer ARIA roles that are synonyms for older roles. https://wpt.fyi/results/wai-aria/role/synonym-roles.html has a number of subtests which expect that when retrieving the value of an explicitly- specified role attribute, if the value is one of the older role values, implementations must replace that with its newer synonym.
118 lines
4.8 KiB
C++
118 lines
4.8 KiB
C++
/*
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* Copyright (c) 2022, Jonah Shafran <jonahshafran@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/ARIA/ARIAMixin.h>
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#include <LibWeb/ARIA/Roles.h>
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#include <LibWeb/Infra/CharacterTypes.h>
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namespace Web::ARIA {
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// https://www.w3.org/TR/wai-aria-1.2/#introroles
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Optional<Role> ARIAMixin::role_from_role_attribute_value() const
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{
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// 1. Use the rules of the host language to detect that an element has a role attribute and to identify the attribute value string for it.
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auto maybe_role_string = role();
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if (!maybe_role_string.has_value())
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return OptionalNone {};
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// 2. Separate the attribute value string for that attribute into a sequence of whitespace-free substrings by separating on whitespace.
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auto role_string = maybe_role_string.value();
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auto role_list = role_string.bytes_as_string_view().split_view_if(Infra::is_ascii_whitespace);
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// 3. Compare the substrings to all the names of the non-abstract WAI-ARIA roles. Case-sensitivity of the comparison inherits from the case-sensitivity of the host language.
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for (auto const& role_name : role_list) {
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// 4. Use the first such substring in textual order that matches the name of a non-abstract WAI-ARIA role.
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auto role = role_from_string(role_name);
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if (!role.has_value())
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continue;
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// NOTE: Per https://w3c.github.io/aria/#directory, "Authors are advised to treat directory as deprecated and to
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// use 'list'." Further, the "directory role == computedrole list" and "div w/directory role == computedrole
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// list" tests in https://wpt.fyi/results/wai-aria/role/synonym-roles.html expect "list", not "directory".
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if (role == Role::directory)
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return Role::list;
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// NOTE: The "image" role value is a synonym for the older "img" role value; however, the "synonym img role ==
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// computedrole image" test in https://wpt.fyi/results/wai-aria/role/synonym-roles.html expects "image", not "img".
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if (role == Role::img)
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return Role::image;
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// NOTE: Per https://w3c.github.io/aria/#presentation, "the working group introduced none as the preferred
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// synonym to the presentation role"; further, https://wpt.fyi/results/wai-aria/role/synonym-roles.html has a
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// "synonym presentation role == computedrole none" test that expects "none", not "presentation".
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if (role == Role::presentation)
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return Role::none;
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if (!is_abstract_role(*role))
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return *role;
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}
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// https://www.w3.org/TR/wai-aria-1.2/#document-handling_author-errors_roles
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// If the role attribute contains no tokens matching the name of a non-abstract WAI-ARIA role, the user agent MUST treat the element as if no role had been provided.
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// https://www.w3.org/TR/wai-aria-1.2/#implicit_semantics
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return OptionalNone {};
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}
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Optional<Role> ARIAMixin::role_or_default() const
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{
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if (auto role = role_from_role_attribute_value(); role.has_value())
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return role;
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return default_role();
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}
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// https://www.w3.org/TR/wai-aria-1.2/#global_states
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bool ARIAMixin::has_global_aria_attribute() const
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{
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return aria_atomic().has_value()
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|| aria_braille_label().has_value()
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|| aria_braille_role_description().has_value()
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|| aria_busy().has_value()
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|| aria_controls().has_value()
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|| aria_current().has_value()
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|| aria_described_by().has_value()
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|| aria_description().has_value()
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|| aria_details().has_value()
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|| aria_disabled().has_value()
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|| aria_drop_effect().has_value()
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|| aria_error_message().has_value()
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|| aria_flow_to().has_value()
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|| aria_grabbed().has_value()
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|| aria_has_popup().has_value()
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|| aria_hidden().has_value()
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|| aria_invalid().has_value()
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|| aria_key_shortcuts().has_value()
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|| aria_label().has_value()
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|| aria_labelled_by().has_value()
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|| aria_live().has_value()
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|| aria_owns().has_value()
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|| aria_relevant().has_value()
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|| aria_role_description().has_value();
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}
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Optional<String> ARIAMixin::parse_id_reference(Optional<String> const& id_reference) const
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{
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if (!id_reference.has_value())
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return {};
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if (id_reference_exists(id_reference.value()))
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return id_reference.value();
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return {};
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}
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Vector<String> ARIAMixin::parse_id_reference_list(Optional<String> const& id_list) const
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{
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Vector<String> result;
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if (!id_list.has_value())
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return result;
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auto id_references = id_list->bytes_as_string_view().split_view_if(Infra::is_ascii_whitespace);
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for (auto const id_reference_view : id_references) {
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auto id_reference = MUST(String::from_utf8(id_reference_view));
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if (id_reference_exists(id_reference))
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result.append(id_reference);
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}
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return result;
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}
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}
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