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AK+Everywhere: Remove the null state of DeprecatedString

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This commit removes DeprecatedString's "null" state, and replaces all
its users with one of the following:
- A normal, empty DeprecatedString
- Optional<DeprecatedString>

Note that null states of DeprecatedFlyString/StringView/etc are *not*
affected by this commit. However, DeprecatedString::empty() is now
considered equal to a null StringView.
This commit is contained in:
Ali Mohammad Pur 2023-10-10 15:00:58 +03:30 • committed by Ali Mohammad Pur
parent daf6d8173c
commit aeee98b3a1
189 changed files with 597 additions and 652 deletions
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28
Userland/Libraries/LibWeb/DOM/Element.cpp
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@ -82,19 +82,19 @@ Element::Element(Document& document, DOM::QualifiedName qualified_name)
return;
// 2. If value is null and oldValue is the empty string, then return.
if (value.is_null() && old_value == DeprecatedString::empty())
if (!value.has_value() && old_value == DeprecatedString::empty())
return;
// 3. If value is the empty string and oldValue is null, then return.
if (value == DeprecatedString::empty() && old_value.is_null())
if (value == DeprecatedString::empty() && !old_value.has_value())
return;
// 4. If value is null or the empty string, then set element’s name to the empty string.
if (value.is_empty())
if (!value.has_value() || value->is_empty())
set_slottable_name({});
// 5. Otherwise, set element’s name to value.
else
set_slottable_name(MUST(String::from_deprecated_string(value)));
set_slottable_name(MUST(String::from_deprecated_string(*value)));
// 6. If element is assigned, then run assign slottables for element’s assigned slot.
if (auto assigned_slot = assigned_slot_internal())
@ -468,7 +468,7 @@ void Element::add_attribute_change_steps(AttributeChangeSteps steps)
m_attribute_change_steps.append(move(steps));
}
void Element::run_attribute_change_steps(FlyString const& local_name, DeprecatedString const& old_value, DeprecatedString const& value, DeprecatedFlyString const& namespace_)
void Element::run_attribute_change_steps(FlyString const& local_name, Optional<DeprecatedString> const& old_value, Optional<DeprecatedString> const& value, DeprecatedFlyString const& namespace_)
{
for (auto const& attribute_change_steps : m_attribute_change_steps)
attribute_change_steps(local_name, old_value, value, namespace_);
@ -478,19 +478,21 @@ void Element::run_attribute_change_steps(FlyString const& local_name, Deprecated
invalidate_style_after_attribute_change(local_name);
}
void Element::attribute_changed(FlyString const& name, DeprecatedString const& value)
void Element::attribute_changed(FlyString const& name, Optional<DeprecatedString> const& value)
{
auto value_or_empty = value.value_or("");
if (name == HTML::AttributeNames::class_) {
auto new_classes = value.split_view(Infra::is_ascii_whitespace);
auto new_classes = value_or_empty.split_view(Infra::is_ascii_whitespace);
m_classes.clear();
m_classes.ensure_capacity(new_classes.size());
for (auto& new_class : new_classes) {
m_classes.unchecked_append(FlyString::from_utf8(new_class).release_value_but_fixme_should_propagate_errors());
}
if (m_class_list)
m_class_list->associated_attribute_changed(value);
m_class_list->associated_attribute_changed(value_or_empty);
} else if (name == HTML::AttributeNames::style) {
if (value.is_null()) {
if (!value.has_value()) {
if (!m_inline_style) {
m_inline_style = nullptr;
set_needs_style_update(true);
@ -499,16 +501,16 @@ void Element::attribute_changed(FlyString const& name, DeprecatedString const& v
// https://drafts.csswg.org/cssom/#ref-for-cssstyledeclaration-updating-flag
if (m_inline_style && m_inline_style->is_updating())
return;
m_inline_style = parse_css_style_attribute(CSS::Parser::ParsingContext(document()), value, *this);
m_inline_style = parse_css_style_attribute(CSS::Parser::ParsingContext(document()), *value, *this);
set_needs_style_update(true);
}
} else if (name == HTML::AttributeNames::dir) {
// https://html.spec.whatwg.org/multipage/dom.html#attr-dir
if (value.equals_ignoring_ascii_case("ltr"sv))
if (value_or_empty.equals_ignoring_ascii_case("ltr"sv))
m_dir = Dir::Ltr;
else if (value.equals_ignoring_ascii_case("rtl"sv))
else if (value_or_empty.equals_ignoring_ascii_case("rtl"sv))
m_dir = Dir::Rtl;
else if (value.equals_ignoring_ascii_case("auto"sv))
else if (value_or_empty.equals_ignoring_ascii_case("auto"sv))
m_dir = Dir::Auto;
else
m_dir = {};