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94 lines
3.4 KiB
C++
94 lines
3.4 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_or_default() 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 default_role();
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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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if (is_non_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 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_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_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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