e941f07931
By the time that property() gets called, we've already given every single property a value, so we can just return it. This simplifies a lot of places that were manually handling a lack of value unnecessarily.
444 lines
24 KiB
C++
444 lines
24 KiB
C++
/*
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* Copyright (c) 2021-2022, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Debug.h>
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#include <AK/NonnullRefPtr.h>
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#include <LibWeb/CSS/Enums.h>
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#include <LibWeb/CSS/ResolvedCSSStyleDeclaration.h>
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#include <LibWeb/CSS/StyleComputer.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Element.h>
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namespace Web::CSS {
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ResolvedCSSStyleDeclaration::ResolvedCSSStyleDeclaration(DOM::Element& element)
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: m_element(element)
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{
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}
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size_t ResolvedCSSStyleDeclaration::length() const
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{
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return 0;
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}
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String ResolvedCSSStyleDeclaration::item(size_t index) const
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{
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(void)index;
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return {};
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}
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static RefPtr<StyleValue> style_value_for_display(CSS::Display display)
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{
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if (display.is_none())
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return IdentifierStyleValue::create(CSS::ValueID::None);
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if (display.is_outside_and_inside()) {
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NonnullRefPtrVector<StyleValue> values;
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switch (display.outside()) {
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case CSS::Display::Outside::Inline:
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values.append(IdentifierStyleValue::create(CSS::ValueID::Inline));
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break;
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case CSS::Display::Outside::Block:
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values.append(IdentifierStyleValue::create(CSS::ValueID::Block));
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break;
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case CSS::Display::Outside::RunIn:
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values.append(IdentifierStyleValue::create(CSS::ValueID::RunIn));
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break;
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}
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switch (display.inside()) {
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case CSS::Display::Inside::Flow:
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values.append(IdentifierStyleValue::create(CSS::ValueID::Flow));
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break;
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case CSS::Display::Inside::FlowRoot:
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values.append(IdentifierStyleValue::create(CSS::ValueID::FlowRoot));
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break;
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case CSS::Display::Inside::Table:
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values.append(IdentifierStyleValue::create(CSS::ValueID::Table));
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break;
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case CSS::Display::Inside::Flex:
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values.append(IdentifierStyleValue::create(CSS::ValueID::Flex));
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break;
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case CSS::Display::Inside::Grid:
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values.append(IdentifierStyleValue::create(CSS::ValueID::Grid));
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break;
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case CSS::Display::Inside::Ruby:
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values.append(IdentifierStyleValue::create(CSS::ValueID::Ruby));
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break;
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}
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return StyleValueList::create(move(values), StyleValueList::Separator::Space);
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}
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if (display.is_internal()) {
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switch (display.internal()) {
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case CSS::Display::Internal::TableRowGroup:
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return IdentifierStyleValue::create(CSS::ValueID::TableRowGroup);
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case CSS::Display::Internal::TableHeaderGroup:
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return IdentifierStyleValue::create(CSS::ValueID::TableHeaderGroup);
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case CSS::Display::Internal::TableFooterGroup:
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return IdentifierStyleValue::create(CSS::ValueID::TableFooterGroup);
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case CSS::Display::Internal::TableRow:
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return IdentifierStyleValue::create(CSS::ValueID::TableRow);
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case CSS::Display::Internal::TableCell:
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return IdentifierStyleValue::create(CSS::ValueID::TableCell);
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case CSS::Display::Internal::TableColumnGroup:
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return IdentifierStyleValue::create(CSS::ValueID::TableColumnGroup);
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case CSS::Display::Internal::TableColumn:
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return IdentifierStyleValue::create(CSS::ValueID::TableColumn);
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case CSS::Display::Internal::TableCaption:
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return IdentifierStyleValue::create(CSS::ValueID::TableCaption);
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case CSS::Display::Internal::RubyBase:
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return IdentifierStyleValue::create(CSS::ValueID::RubyBase);
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case CSS::Display::Internal::RubyText:
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return IdentifierStyleValue::create(CSS::ValueID::RubyText);
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case CSS::Display::Internal::RubyBaseContainer:
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return IdentifierStyleValue::create(CSS::ValueID::RubyBaseContainer);
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case CSS::Display::Internal::RubyTextContainer:
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return IdentifierStyleValue::create(CSS::ValueID::RubyTextContainer);
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}
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}
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TODO();
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}
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static NonnullRefPtr<StyleValue> value_or_default(Optional<StyleProperty> property, NonnullRefPtr<StyleValue> default_style)
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{
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if (property.has_value())
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return property.value().value;
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return default_style;
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}
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static NonnullRefPtr<StyleValue> style_value_for_length_percentage(LengthPercentage const& length_percentage)
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{
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if (length_percentage.is_percentage())
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return PercentageStyleValue::create(length_percentage.percentage());
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if (length_percentage.is_length())
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return LengthStyleValue::create(length_percentage.length());
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return length_percentage.calculated();
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}
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RefPtr<StyleValue> ResolvedCSSStyleDeclaration::style_value_for_property(Layout::NodeWithStyle const& layout_node, PropertyID property_id) const
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{
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switch (property_id) {
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case CSS::PropertyID::Float:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().float_()));
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case CSS::PropertyID::Clear:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().clear()));
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case CSS::PropertyID::Cursor:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().cursor()));
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case CSS::PropertyID::Display:
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return style_value_for_display(layout_node.computed_values().display());
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case CSS::PropertyID::ZIndex: {
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auto maybe_z_index = layout_node.computed_values().z_index();
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if (!maybe_z_index.has_value())
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return {};
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return NumericStyleValue::create_integer(maybe_z_index.release_value());
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}
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case CSS::PropertyID::TextAlign:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().text_align()));
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case CSS::PropertyID::TextDecorationLine:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().text_decoration_line()));
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case CSS::PropertyID::TextDecorationStyle:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().text_decoration_style()));
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case CSS::PropertyID::TextTransform:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().text_transform()));
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case CSS::PropertyID::Position:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().position()));
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case CSS::PropertyID::WhiteSpace:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().white_space()));
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case CSS::PropertyID::FlexDirection:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().flex_direction()));
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case CSS::PropertyID::FlexWrap:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().flex_wrap()));
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case CSS::PropertyID::FlexBasis: {
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switch (layout_node.computed_values().flex_basis().type) {
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case FlexBasis::Content:
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return IdentifierStyleValue::create(CSS::ValueID::Content);
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case FlexBasis::LengthPercentage:
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return style_value_for_length_percentage(*layout_node.computed_values().flex_basis().length_percentage);
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case FlexBasis::Auto:
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return IdentifierStyleValue::create(CSS::ValueID::Auto);
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default:
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VERIFY_NOT_REACHED();
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}
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break;
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case CSS::PropertyID::FlexGrow:
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return NumericStyleValue::create_float(layout_node.computed_values().flex_grow());
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case CSS::PropertyID::FlexShrink:
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return NumericStyleValue::create_float(layout_node.computed_values().flex_shrink());
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case CSS::PropertyID::Order:
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return NumericStyleValue::create_integer(layout_node.computed_values().order());
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case CSS::PropertyID::Opacity:
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return NumericStyleValue::create_float(layout_node.computed_values().opacity());
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case CSS::PropertyID::ImageRendering:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().image_rendering()));
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case CSS::PropertyID::JustifyContent:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().justify_content()));
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case CSS::PropertyID::BoxShadow: {
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auto box_shadow_layers = layout_node.computed_values().box_shadow();
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if (box_shadow_layers.is_empty())
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return {};
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auto make_box_shadow_style_value = [](ShadowData const& data) {
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return ShadowStyleValue::create(data.color, data.offset_x, data.offset_y, data.blur_radius, data.spread_distance, data.placement);
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};
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if (box_shadow_layers.size() == 1)
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return make_box_shadow_style_value(box_shadow_layers.first());
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NonnullRefPtrVector<StyleValue> box_shadow;
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box_shadow.ensure_capacity(box_shadow_layers.size());
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for (auto const& layer : box_shadow_layers)
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box_shadow.append(make_box_shadow_style_value(layer));
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return StyleValueList::create(move(box_shadow), StyleValueList::Separator::Comma);
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}
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case CSS::PropertyID::Width:
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return style_value_for_length_percentage(layout_node.computed_values().width().value_or(Length::make_auto()));
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case CSS::PropertyID::MinWidth:
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if (!layout_node.computed_values().min_width().has_value())
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return IdentifierStyleValue::create(CSS::ValueID::Auto);
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return style_value_for_length_percentage(layout_node.computed_values().min_width().value());
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case CSS::PropertyID::MaxWidth:
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if (!layout_node.computed_values().max_width().has_value())
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return IdentifierStyleValue::create(CSS::ValueID::None);
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return style_value_for_length_percentage(layout_node.computed_values().max_width().value());
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case CSS::PropertyID::Height:
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return style_value_for_length_percentage(layout_node.computed_values().height().value_or(Length::make_auto()));
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case CSS::PropertyID::MinHeight:
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if (!layout_node.computed_values().min_height().has_value())
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return IdentifierStyleValue::create(CSS::ValueID::Auto);
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return style_value_for_length_percentage(layout_node.computed_values().min_height().value());
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case CSS::PropertyID::MaxHeight:
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if (!layout_node.computed_values().max_height().has_value())
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return IdentifierStyleValue::create(CSS::ValueID::None);
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return style_value_for_length_percentage(layout_node.computed_values().max_height().value());
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case CSS::PropertyID::Margin: {
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auto margin = layout_node.computed_values().margin();
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auto values = NonnullRefPtrVector<StyleValue> {};
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values.append(style_value_for_length_percentage(margin.top));
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values.append(style_value_for_length_percentage(margin.right));
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values.append(style_value_for_length_percentage(margin.bottom));
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values.append(style_value_for_length_percentage(margin.left));
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return StyleValueList::create(move(values), StyleValueList::Separator::Space);
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}
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case CSS::PropertyID::MarginTop:
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return style_value_for_length_percentage(layout_node.computed_values().margin().top);
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case CSS::PropertyID::MarginRight:
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return style_value_for_length_percentage(layout_node.computed_values().margin().right);
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case CSS::PropertyID::MarginBottom:
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return style_value_for_length_percentage(layout_node.computed_values().margin().bottom);
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case CSS::PropertyID::MarginLeft:
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return style_value_for_length_percentage(layout_node.computed_values().margin().left);
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case CSS::PropertyID::Padding: {
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auto padding = layout_node.computed_values().padding();
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auto values = NonnullRefPtrVector<StyleValue> {};
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values.append(style_value_for_length_percentage(padding.top));
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values.append(style_value_for_length_percentage(padding.right));
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values.append(style_value_for_length_percentage(padding.bottom));
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values.append(style_value_for_length_percentage(padding.left));
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return StyleValueList::create(move(values), StyleValueList::Separator::Space);
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}
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case CSS::PropertyID::PaddingTop:
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return style_value_for_length_percentage(layout_node.computed_values().padding().top);
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case CSS::PropertyID::PaddingRight:
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return style_value_for_length_percentage(layout_node.computed_values().padding().right);
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case CSS::PropertyID::PaddingBottom:
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return style_value_for_length_percentage(layout_node.computed_values().padding().bottom);
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case CSS::PropertyID::PaddingLeft:
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return style_value_for_length_percentage(layout_node.computed_values().padding().left);
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case CSS::PropertyID::BorderRadius: {
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auto maybe_top_left_radius = property(CSS::PropertyID::BorderTopLeftRadius);
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auto maybe_top_right_radius = property(CSS::PropertyID::BorderTopRightRadius);
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auto maybe_bottom_left_radius = property(CSS::PropertyID::BorderBottomLeftRadius);
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auto maybe_bottom_right_radius = property(CSS::PropertyID::BorderBottomRightRadius);
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RefPtr<BorderRadiusStyleValue> top_left_radius, top_right_radius, bottom_left_radius, bottom_right_radius;
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if (maybe_top_left_radius.has_value()) {
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VERIFY(maybe_top_left_radius.value().value->is_border_radius());
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top_left_radius = maybe_top_left_radius.value().value->as_border_radius();
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}
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if (maybe_top_right_radius.has_value()) {
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VERIFY(maybe_top_right_radius.value().value->is_border_radius());
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top_right_radius = maybe_top_right_radius.value().value->as_border_radius();
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}
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if (maybe_bottom_left_radius.has_value()) {
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VERIFY(maybe_bottom_left_radius.value().value->is_border_radius());
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bottom_left_radius = maybe_bottom_left_radius.value().value->as_border_radius();
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}
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if (maybe_bottom_right_radius.has_value()) {
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VERIFY(maybe_bottom_right_radius.value().value->is_border_radius());
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bottom_right_radius = maybe_bottom_right_radius.value().value->as_border_radius();
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}
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return CombinedBorderRadiusStyleValue::create(top_left_radius.release_nonnull(), top_right_radius.release_nonnull(), bottom_right_radius.release_nonnull(), bottom_left_radius.release_nonnull());
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}
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// FIXME: The two radius components are not yet stored, as we currently don't actually render them.
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case CSS::PropertyID::BorderBottomLeftRadius:
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return BorderRadiusStyleValue::create(layout_node.computed_values().border_bottom_left_radius(), layout_node.computed_values().border_bottom_left_radius());
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case CSS::PropertyID::BorderBottomRightRadius:
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return BorderRadiusStyleValue::create(layout_node.computed_values().border_bottom_right_radius(), layout_node.computed_values().border_bottom_right_radius());
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case CSS::PropertyID::BorderTopLeftRadius:
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return BorderRadiusStyleValue::create(layout_node.computed_values().border_top_left_radius(), layout_node.computed_values().border_top_left_radius());
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case CSS::PropertyID::BorderTopRightRadius:
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return BorderRadiusStyleValue::create(layout_node.computed_values().border_top_right_radius(), layout_node.computed_values().border_top_right_radius());
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case CSS::PropertyID::BorderTopWidth:
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return LengthStyleValue::create(Length::make_px(layout_node.computed_values().border_top().width));
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case CSS::PropertyID::BorderRightWidth:
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return LengthStyleValue::create(Length::make_px(layout_node.computed_values().border_right().width));
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case CSS::PropertyID::BorderBottomWidth:
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return LengthStyleValue::create(Length::make_px(layout_node.computed_values().border_bottom().width));
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case CSS::PropertyID::BorderLeftWidth:
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return LengthStyleValue::create(Length::make_px(layout_node.computed_values().border_left().width));
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case CSS::PropertyID::BorderTopColor:
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return ColorStyleValue::create(layout_node.computed_values().border_top().color);
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case CSS::PropertyID::BorderRightColor:
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return ColorStyleValue::create(layout_node.computed_values().border_right().color);
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case CSS::PropertyID::BorderBottomColor:
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return ColorStyleValue::create(layout_node.computed_values().border_bottom().color);
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case CSS::PropertyID::BorderLeftColor:
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return ColorStyleValue::create(layout_node.computed_values().border_left().color);
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case CSS::PropertyID::BorderTopStyle:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().border_top().line_style));
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case CSS::PropertyID::BorderRightStyle:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().border_right().line_style));
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case CSS::PropertyID::BorderBottomStyle:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().border_bottom().line_style));
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case CSS::PropertyID::BorderLeftStyle:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().border_left().line_style));
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case CSS::PropertyID::BorderTop: {
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auto border = layout_node.computed_values().border_top();
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auto width = LengthStyleValue::create(Length::make_px(border.width));
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auto style = IdentifierStyleValue::create(to_value_id(border.line_style));
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auto color = ColorStyleValue::create(border.color);
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return BorderStyleValue::create(width, style, color);
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}
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case CSS::PropertyID::BorderRight: {
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auto border = layout_node.computed_values().border_right();
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auto width = LengthStyleValue::create(Length::make_px(border.width));
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auto style = IdentifierStyleValue::create(to_value_id(border.line_style));
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auto color = ColorStyleValue::create(border.color);
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return BorderStyleValue::create(width, style, color);
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}
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case CSS::PropertyID::BorderBottom: {
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auto border = layout_node.computed_values().border_bottom();
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auto width = LengthStyleValue::create(Length::make_px(border.width));
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auto style = IdentifierStyleValue::create(to_value_id(border.line_style));
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auto color = ColorStyleValue::create(border.color);
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return BorderStyleValue::create(width, style, color);
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}
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case CSS::PropertyID::BorderLeft: {
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auto border = layout_node.computed_values().border_left();
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auto width = LengthStyleValue::create(Length::make_px(border.width));
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auto style = IdentifierStyleValue::create(to_value_id(border.line_style));
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auto color = ColorStyleValue::create(border.color);
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return BorderStyleValue::create(width, style, color);
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}
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case CSS::PropertyID::OverflowX:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().overflow_x()));
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case CSS::PropertyID::OverflowY:
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return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().overflow_y()));
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case CSS::PropertyID::Color:
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return ColorStyleValue::create(layout_node.computed_values().color());
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case PropertyID::BackgroundColor:
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return ColorStyleValue::create(layout_node.computed_values().background_color());
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case CSS::PropertyID::Background: {
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auto maybe_background_color = property(CSS::PropertyID::BackgroundColor);
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auto maybe_background_image = property(CSS::PropertyID::BackgroundImage);
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auto maybe_background_position = property(CSS::PropertyID::BackgroundPosition);
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auto maybe_background_size = property(CSS::PropertyID::BackgroundSize);
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auto maybe_background_repeat = property(CSS::PropertyID::BackgroundRepeat);
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auto maybe_background_attachment = property(CSS::PropertyID::BackgroundAttachment);
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auto maybe_background_origin = property(CSS::PropertyID::BackgroundOrigin);
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auto maybe_background_clip = property(CSS::PropertyID::BackgroundClip);
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return BackgroundStyleValue::create(
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value_or_default(maybe_background_color, InitialStyleValue::the()),
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value_or_default(maybe_background_image, IdentifierStyleValue::create(CSS::ValueID::None)),
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value_or_default(maybe_background_position, PositionStyleValue::create(PositionEdge::Left, Length::make_px(0), PositionEdge::Top, Length::make_px(0))),
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value_or_default(maybe_background_size, IdentifierStyleValue::create(CSS::ValueID::Auto)),
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value_or_default(maybe_background_repeat, BackgroundRepeatStyleValue::create(CSS::Repeat::Repeat, CSS::Repeat::Repeat)),
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value_or_default(maybe_background_attachment, IdentifierStyleValue::create(CSS::ValueID::Scroll)),
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value_or_default(maybe_background_origin, IdentifierStyleValue::create(CSS::ValueID::PaddingBox)),
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value_or_default(maybe_background_clip, IdentifierStyleValue::create(CSS::ValueID::BorderBox)));
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}
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case CSS::PropertyID::VerticalAlign:
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if (auto const* length_percentage = layout_node.computed_values().vertical_align().get_pointer<CSS::LengthPercentage>()) {
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if (length_percentage->is_length())
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return LengthStyleValue::create(length_percentage->length());
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if (length_percentage->is_percentage())
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return PercentageStyleValue::create(length_percentage->percentage());
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VERIFY_NOT_REACHED();
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|
}
|
|
return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().vertical_align().get<CSS::VerticalAlign>()));
|
|
case CSS::PropertyID::ListStyleType:
|
|
return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().list_style_type()));
|
|
case CSS::PropertyID::BoxSizing:
|
|
return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().box_sizing()));
|
|
case CSS::PropertyID::Invalid:
|
|
return IdentifierStyleValue::create(CSS::ValueID::Invalid);
|
|
case CSS::PropertyID::Custom:
|
|
dbgln_if(LIBWEB_CSS_DEBUG, "Computed style for custom properties was requested (?)");
|
|
return {};
|
|
default:
|
|
dbgln_if(LIBWEB_CSS_DEBUG, "FIXME: Computed style for the '{}' property was requested", string_from_property_id(property_id));
|
|
return {};
|
|
}
|
|
}
|
|
}
|
|
|
|
Optional<StyleProperty> ResolvedCSSStyleDeclaration::property(PropertyID property_id) const
|
|
{
|
|
if (CSS::property_affects_layout(property_id)) {
|
|
const_cast<DOM::Document&>(m_element->document()).update_layout();
|
|
} else {
|
|
// FIXME: If we had a way to update style for a single element, this would be a good place to use it.
|
|
const_cast<DOM::Document&>(m_element->document()).update_style();
|
|
}
|
|
|
|
if (!m_element->layout_node()) {
|
|
auto style = m_element->document().style_computer().compute_style(const_cast<DOM::Element&>(*m_element));
|
|
return StyleProperty {
|
|
.property_id = property_id,
|
|
.value = style->property(property_id),
|
|
};
|
|
return {};
|
|
}
|
|
|
|
auto& layout_node = *m_element->layout_node();
|
|
auto value = style_value_for_property(layout_node, property_id);
|
|
if (!value)
|
|
return {};
|
|
return StyleProperty {
|
|
.property_id = property_id,
|
|
.value = value.release_nonnull(),
|
|
};
|
|
}
|
|
|
|
// https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-setproperty
|
|
DOM::ExceptionOr<void> ResolvedCSSStyleDeclaration::set_property(PropertyID, StringView, StringView)
|
|
{
|
|
// 1. If the computed flag is set, then throw a NoModificationAllowedError exception.
|
|
return DOM::NoModificationAllowedError::create("Cannot modify properties in result of getComputedStyle()");
|
|
}
|
|
|
|
// https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-removeproperty
|
|
DOM::ExceptionOr<String> ResolvedCSSStyleDeclaration::remove_property(PropertyID)
|
|
{
|
|
// 1. If the computed flag is set, then throw a NoModificationAllowedError exception.
|
|
return DOM::NoModificationAllowedError::create("Cannot remove properties from result of getComputedStyle()");
|
|
}
|
|
|
|
String ResolvedCSSStyleDeclaration::serialized() const
|
|
{
|
|
// https://www.w3.org/TR/cssom/#dom-cssstyledeclaration-csstext
|
|
// If the computed flag is set, then return the empty string.
|
|
|
|
// NOTE: ResolvedCSSStyleDeclaration is something you would only get from window.getComputedStyle(),
|
|
// which returns what the spec calls "resolved style". The "computed flag" is always set here.
|
|
return String::empty();
|
|
}
|
|
|
|
}
|