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ladybird/Libraries/LibWeb/CSS/StyleValues/CSSKeywordValue.cpp
Callum Law 6a9c8d7767 LibWeb: Don't resolve colors with unresolved components 
`CSSColorValue`s which have unresolved `calc` components should be able
to be resolved. Previously we would always resolve them but with
incorrect values.

This is useful as we will now be able to now whether we should serialize
colors in their normalized form or not.

Slight regression in that we now serialize (RGB, HSL and HWB) colors
with components that rely on compute-time information as an empty
string, but that will be fixed in the next commit.
2025-07-16 13:05:33 +01:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
* Copyright (c) 2021-2024, Sam Atkins <sam@ladybird.org>
* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "CSSKeywordValue.h"
#include <LibGfx/Palette.h>
#include <LibWeb/CSS/SystemColor.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/Layout/Node.h>
#include <LibWeb/Page/Page.h>
namespace Web::CSS {
String CSSKeywordValue::to_string(SerializationMode) const
{
return MUST(String::from_utf8(string_from_keyword(keyword())));
}
bool CSSKeywordValue::is_color(Keyword keyword)
{
switch (keyword) {
case Keyword::Accentcolor:
case Keyword::Accentcolortext:
case Keyword::Activeborder:
case Keyword::Activecaption:
case Keyword::Activetext:
case Keyword::Appworkspace:
case Keyword::Background:
case Keyword::Buttonborder:
case Keyword::Buttonface:
case Keyword::Buttonhighlight:
case Keyword::Buttonshadow:
case Keyword::Buttontext:
case Keyword::Canvas:
case Keyword::Canvastext:
case Keyword::Captiontext:
case Keyword::Currentcolor:
case Keyword::Field:
case Keyword::Fieldtext:
case Keyword::Graytext:
case Keyword::Highlight:
case Keyword::Highlighttext:
case Keyword::Inactiveborder:
case Keyword::Inactivecaption:
case Keyword::Inactivecaptiontext:
case Keyword::Infobackground:
case Keyword::Infotext:
case Keyword::LibwebButtonfacedisabled:
case Keyword::LibwebButtonfacehover:
case Keyword::LibwebLink:
case Keyword::LibwebPaletteActiveLink:
case Keyword::LibwebPaletteActiveWindowBorder1:
case Keyword::LibwebPaletteActiveWindowBorder2:
case Keyword::LibwebPaletteActiveWindowTitle:
case Keyword::LibwebPaletteBase:
case Keyword::LibwebPaletteBaseText:
case Keyword::LibwebPaletteButton:
case Keyword::LibwebPaletteButtonText:
case Keyword::LibwebPaletteDesktopBackground:
case Keyword::LibwebPaletteFocusOutline:
case Keyword::LibwebPaletteHighlightWindowBorder1:
case Keyword::LibwebPaletteHighlightWindowBorder2:
case Keyword::LibwebPaletteHighlightWindowTitle:
case Keyword::LibwebPaletteHoverHighlight:
case Keyword::LibwebPaletteInactiveSelection:
case Keyword::LibwebPaletteInactiveSelectionText:
case Keyword::LibwebPaletteInactiveWindowBorder1:
case Keyword::LibwebPaletteInactiveWindowBorder2:
case Keyword::LibwebPaletteInactiveWindowTitle:
case Keyword::LibwebPaletteLink:
case Keyword::LibwebPaletteMenuBase:
case Keyword::LibwebPaletteMenuBaseText:
case Keyword::LibwebPaletteMenuSelection:
case Keyword::LibwebPaletteMenuSelectionText:
case Keyword::LibwebPaletteMenuStripe:
case Keyword::LibwebPaletteMovingWindowBorder1:
case Keyword::LibwebPaletteMovingWindowBorder2:
case Keyword::LibwebPaletteMovingWindowTitle:
case Keyword::LibwebPaletteRubberBandBorder:
case Keyword::LibwebPaletteRubberBandFill:
case Keyword::LibwebPaletteRuler:
case Keyword::LibwebPaletteRulerActiveText:
case Keyword::LibwebPaletteRulerBorder:
case Keyword::LibwebPaletteRulerInactiveText:
case Keyword::LibwebPaletteSelection:
case Keyword::LibwebPaletteSelectionText:
case Keyword::LibwebPaletteSyntaxComment:
case Keyword::LibwebPaletteSyntaxControlKeyword:
case Keyword::LibwebPaletteSyntaxIdentifier:
case Keyword::LibwebPaletteSyntaxKeyword:
case Keyword::LibwebPaletteSyntaxNumber:
case Keyword::LibwebPaletteSyntaxOperator:
case Keyword::LibwebPaletteSyntaxPreprocessorStatement:
case Keyword::LibwebPaletteSyntaxPreprocessorValue:
case Keyword::LibwebPaletteSyntaxPunctuation:
case Keyword::LibwebPaletteSyntaxString:
case Keyword::LibwebPaletteSyntaxType:
case Keyword::LibwebPaletteTextCursor:
case Keyword::LibwebPaletteThreedHighlight:
case Keyword::LibwebPaletteThreedShadow1:
case Keyword::LibwebPaletteThreedShadow2:
case Keyword::LibwebPaletteVisitedLink:
case Keyword::LibwebPaletteWindow:
case Keyword::LibwebPaletteWindowText:
case Keyword::Linktext:
case Keyword::Mark:
case Keyword::Marktext:
case Keyword::Menu:
case Keyword::Menutext:
case Keyword::Scrollbar:
case Keyword::Selecteditem:
case Keyword::Selecteditemtext:
case Keyword::Threeddarkshadow:
case Keyword::Threedface:
case Keyword::Threedhighlight:
case Keyword::Threedlightshadow:
case Keyword::Threedshadow:
case Keyword::Visitedtext:
case Keyword::Window:
case Keyword::Windowframe:
case Keyword::Windowtext:
return true;
default:
return false;
}
}
bool CSSKeywordValue::has_color() const
{
return is_color(keyword());
}
Optional<Color> CSSKeywordValue::to_color(Optional<Layout::NodeWithStyle const&> node, CalculationResolutionContext const&) const
{
if (keyword() == Keyword::Currentcolor) {
if (!node.has_value() || !node->has_style())
return Color::Black;
return node->computed_values().color();
}
PreferredColorScheme scheme = PreferredColorScheme::Light;
if (node.has_value()) {
scheme = node->computed_values().color_scheme();
}
// First, handle <system-color>s, since they don't strictly require a node.
// https://www.w3.org/TR/css-color-4/#css-system-colors
// https://www.w3.org/TR/css-color-4/#deprecated-system-colors
switch (keyword()) {
case Keyword::Accentcolor:
return SystemColor::accent_color(scheme);
case Keyword::Accentcolortext:
return SystemColor::accent_color_text(scheme);
case Keyword::Buttonborder:
case Keyword::Activeborder:
case Keyword::Inactiveborder:
case Keyword::Threeddarkshadow:
case Keyword::Threedhighlight:
case Keyword::Threedlightshadow:
case Keyword::Threedshadow:
case Keyword::Windowframe:
return SystemColor::button_border(scheme);
case Keyword::Buttonface:
case Keyword::Buttonhighlight:
case Keyword::Buttonshadow:
case Keyword::Threedface:
return SystemColor::button_face(scheme);
case Keyword::Buttontext:
return SystemColor::button_text(scheme);
case Keyword::Canvas:
case Keyword::Appworkspace:
case Keyword::Background:
case Keyword::Inactivecaption:
case Keyword::Infobackground:
case Keyword::Menu:
case Keyword::Scrollbar:
case Keyword::Window:
return SystemColor::canvas(scheme);
case Keyword::Canvastext:
case Keyword::Activecaption:
case Keyword::Captiontext:
case Keyword::Infotext:
case Keyword::Menutext:
case Keyword::Windowtext:
return SystemColor::canvas_text(scheme);
case Keyword::Field:
return SystemColor::field(scheme);
case Keyword::Fieldtext:
return SystemColor::field_text(scheme);
case Keyword::Graytext:
case Keyword::Inactivecaptiontext:
return SystemColor::gray_text(scheme);
case Keyword::Highlight:
return SystemColor::highlight(scheme);
case Keyword::Highlighttext:
return SystemColor::highlight_text(scheme);
case Keyword::Mark:
return SystemColor::mark(scheme);
case Keyword::Marktext:
return SystemColor::mark_text(scheme);
case Keyword::Selecteditem:
return SystemColor::selected_item(scheme);
case Keyword::Selecteditemtext:
return SystemColor::selected_item_text(scheme);
case Keyword::LibwebButtonfacedisabled:
return SystemColor::button_face(scheme).with_alpha(128);
case Keyword::LibwebButtonfacehover:
return SystemColor::button_face(scheme).darkened(0.8f);
default:
break;
}
if (!node.has_value()) {
// FIXME: Can't resolve palette colors without layout node.
return Color::Black;
}
auto const& document = node->document();
switch (keyword()) {
case Keyword::LibwebLink:
case Keyword::Linktext:
return document.normal_link_color().value_or(SystemColor::link_text(scheme));
case Keyword::Visitedtext:
return document.visited_link_color().value_or(SystemColor::visited_text(scheme));
case Keyword::Activetext:
return document.active_link_color().value_or(SystemColor::active_text(scheme));
default:
break;
}
auto palette = document.page().palette();
switch (keyword()) {
case Keyword::LibwebPaletteDesktopBackground:
return palette.color(ColorRole::DesktopBackground);
case Keyword::LibwebPaletteActiveWindowBorder1:
return palette.color(ColorRole::ActiveWindowBorder1);
case Keyword::LibwebPaletteActiveWindowBorder2:
return palette.color(ColorRole::ActiveWindowBorder2);
case Keyword::LibwebPaletteActiveWindowTitle:
return palette.color(ColorRole::ActiveWindowTitle);
case Keyword::LibwebPaletteInactiveWindowBorder1:
return palette.color(ColorRole::InactiveWindowBorder1);
case Keyword::LibwebPaletteInactiveWindowBorder2:
return palette.color(ColorRole::InactiveWindowBorder2);
case Keyword::LibwebPaletteInactiveWindowTitle:
return palette.color(ColorRole::InactiveWindowTitle);
case Keyword::LibwebPaletteMovingWindowBorder1:
return palette.color(ColorRole::MovingWindowBorder1);
case Keyword::LibwebPaletteMovingWindowBorder2:
return palette.color(ColorRole::MovingWindowBorder2);
case Keyword::LibwebPaletteMovingWindowTitle:
return palette.color(ColorRole::MovingWindowTitle);
case Keyword::LibwebPaletteHighlightWindowBorder1:
return palette.color(ColorRole::HighlightWindowBorder1);
case Keyword::LibwebPaletteHighlightWindowBorder2:
return palette.color(ColorRole::HighlightWindowBorder2);
case Keyword::LibwebPaletteHighlightWindowTitle:
return palette.color(ColorRole::HighlightWindowTitle);
case Keyword::LibwebPaletteMenuStripe:
return palette.color(ColorRole::MenuStripe);
case Keyword::LibwebPaletteMenuBase:
return palette.color(ColorRole::MenuBase);
case Keyword::LibwebPaletteMenuBaseText:
return palette.color(ColorRole::MenuBaseText);
case Keyword::LibwebPaletteMenuSelection:
return palette.color(ColorRole::MenuSelection);
case Keyword::LibwebPaletteMenuSelectionText:
return palette.color(ColorRole::MenuSelectionText);
case Keyword::LibwebPaletteWindow:
return palette.color(ColorRole::Window);
case Keyword::LibwebPaletteWindowText:
return palette.color(ColorRole::WindowText);
case Keyword::LibwebPaletteButton:
return palette.color(ColorRole::Button);
case Keyword::LibwebPaletteButtonText:
return palette.color(ColorRole::ButtonText);
case Keyword::LibwebPaletteBase:
return palette.color(ColorRole::Base);
case Keyword::LibwebPaletteBaseText:
return palette.color(ColorRole::BaseText);
case Keyword::LibwebPaletteThreedHighlight:
return palette.color(ColorRole::ThreedHighlight);
case Keyword::LibwebPaletteThreedShadow1:
return palette.color(ColorRole::ThreedShadow1);
case Keyword::LibwebPaletteThreedShadow2:
return palette.color(ColorRole::ThreedShadow2);
case Keyword::LibwebPaletteHoverHighlight:
return palette.color(ColorRole::HoverHighlight);
case Keyword::LibwebPaletteSelection:
return palette.color(ColorRole::Selection);
case Keyword::LibwebPaletteSelectionText:
return palette.color(ColorRole::SelectionText);
case Keyword::LibwebPaletteInactiveSelection:
return palette.color(ColorRole::InactiveSelection);
case Keyword::LibwebPaletteInactiveSelectionText:
return palette.color(ColorRole::InactiveSelectionText);
case Keyword::LibwebPaletteRubberBandFill:
return palette.color(ColorRole::RubberBandFill);
case Keyword::LibwebPaletteRubberBandBorder:
return palette.color(ColorRole::RubberBandBorder);
case Keyword::LibwebPaletteLink:
return palette.color(ColorRole::Link);
case Keyword::LibwebPaletteActiveLink:
return palette.color(ColorRole::ActiveLink);
case Keyword::LibwebPaletteVisitedLink:
return palette.color(ColorRole::VisitedLink);
case Keyword::LibwebPaletteRuler:
return palette.color(ColorRole::Ruler);
case Keyword::LibwebPaletteRulerBorder:
return palette.color(ColorRole::RulerBorder);
case Keyword::LibwebPaletteRulerActiveText:
return palette.color(ColorRole::RulerActiveText);
case Keyword::LibwebPaletteRulerInactiveText:
return palette.color(ColorRole::RulerInactiveText);
case Keyword::LibwebPaletteTextCursor:
return palette.color(ColorRole::TextCursor);
case Keyword::LibwebPaletteFocusOutline:
return palette.color(ColorRole::FocusOutline);
case Keyword::LibwebPaletteSyntaxComment:
return palette.color(ColorRole::SyntaxComment);
case Keyword::LibwebPaletteSyntaxNumber:
return palette.color(ColorRole::SyntaxNumber);
case Keyword::LibwebPaletteSyntaxString:
return palette.color(ColorRole::SyntaxString);
case Keyword::LibwebPaletteSyntaxType:
return palette.color(ColorRole::SyntaxType);
case Keyword::LibwebPaletteSyntaxPunctuation:
return palette.color(ColorRole::SyntaxPunctuation);
case Keyword::LibwebPaletteSyntaxOperator:
return palette.color(ColorRole::SyntaxOperator);
case Keyword::LibwebPaletteSyntaxKeyword:
return palette.color(ColorRole::SyntaxKeyword);
case Keyword::LibwebPaletteSyntaxControlKeyword:
return palette.color(ColorRole::SyntaxControlKeyword);
case Keyword::LibwebPaletteSyntaxIdentifier:
return palette.color(ColorRole::SyntaxIdentifier);
case Keyword::LibwebPaletteSyntaxPreprocessorStatement:
return palette.color(ColorRole::SyntaxPreprocessorStatement);
case Keyword::LibwebPaletteSyntaxPreprocessorValue:
return palette.color(ColorRole::SyntaxPreprocessorValue);
default:
return {};
}
}
}
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