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serenity/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
Sam Atkins 4b554ba92a LibWeb: Clarify StyleValue API with new naming scheme 
This does a few things, that are hard to separate. For a while now, it's
been confuzing what `StyleValue::is_foo()` actually means. It sometimes
was used to check the type, and sometimes to see if it could return a
certain value type. The new naming scheme is:

- `is_length()` - is it a LengthStyleValue?
- `as_length()` - casts it to LengthStyleValue
- `has_length()` - can it return a Length?
- `to_length()` - gets the internal value out (eg, Length)

This also means, no more `static_cast<LengthStyleValue const&>(*this)`
stuff when dealing with StyleValues. :^)

Hopefully this will be a bit clearer going forward. There are lots of
places using the original methods, so I'll be going through them to
hopefully catch any issues.
2021-09-24 15:01:43 +02:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteBuffer.h>
#include <LibGfx/Palette.h>
#include <LibWeb/CSS/Parser/StyleComponentValueRule.h>
#include <LibWeb/CSS/StyleValue.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/Loader/LoadRequest.h>
#include <LibWeb/Loader/ResourceLoader.h>
#include <LibWeb/Page/BrowsingContext.h>
#include <LibWeb/Page/Page.h>
namespace Web::CSS {
StyleValue::StyleValue(Type type)
: m_type(type)
{
}
StyleValue::~StyleValue()
{
}
BackgroundStyleValue const& StyleValue::as_background() const
{
VERIFY(is_background());
return static_cast<BackgroundStyleValue const&>(*this);
}
BackgroundRepeatStyleValue const& StyleValue::as_background_repeat() const
{
VERIFY(is_background_repeat());
return static_cast<BackgroundRepeatStyleValue const&>(*this);
}
BorderStyleValue const& StyleValue::as_border() const
{
VERIFY(is_border());
return static_cast<BorderStyleValue const&>(*this);
}
BorderRadiusStyleValue const& StyleValue::as_border_radius() const
{
VERIFY(is_border_radius());
return static_cast<BorderRadiusStyleValue const&>(*this);
}
BoxShadowStyleValue const& StyleValue::as_box_shadow() const
{
VERIFY(is_box_shadow());
return static_cast<BoxShadowStyleValue const&>(*this);
}
CalculatedStyleValue const& StyleValue::as_calculated() const
{
VERIFY(is_calculated());
return static_cast<CalculatedStyleValue const&>(*this);
}
ColorStyleValue const& StyleValue::as_color() const
{
VERIFY(is_color());
return static_cast<ColorStyleValue const&>(*this);
}
CustomStyleValue const& StyleValue::as_custom_property() const
{
VERIFY(is_custom_property());
return static_cast<CustomStyleValue const&>(*this);
}
FlexStyleValue const& StyleValue::as_flex() const
{
VERIFY(is_flex());
return static_cast<FlexStyleValue const&>(*this);
}
FlexFlowStyleValue const& StyleValue::as_flex_flow() const
{
VERIFY(is_flex_flow());
return static_cast<FlexFlowStyleValue const&>(*this);
}
FontStyleValue const& StyleValue::as_font() const
{
VERIFY(is_font());
return static_cast<FontStyleValue const&>(*this);
}
IdentifierStyleValue const& StyleValue::as_identifier() const
{
VERIFY(is_identifier());
return static_cast<IdentifierStyleValue const&>(*this);
}
ImageStyleValue const& StyleValue::as_image() const
{
VERIFY(is_image());
return static_cast<ImageStyleValue const&>(*this);
}
InheritStyleValue const& StyleValue::as_inherit() const
{
VERIFY(is_inherit());
return static_cast<InheritStyleValue const&>(*this);
}
InitialStyleValue const& StyleValue::as_initial() const
{
VERIFY(is_initial());
return static_cast<InitialStyleValue const&>(*this);
}
LengthStyleValue const& StyleValue::as_length() const
{
VERIFY(is_length());
return static_cast<LengthStyleValue const&>(*this);
}
ListStyleStyleValue const& StyleValue::as_list_style() const
{
VERIFY(is_list_style());
return static_cast<ListStyleStyleValue const&>(*this);
}
NumericStyleValue const& StyleValue::as_numeric() const
{
VERIFY(is_numeric());
return static_cast<NumericStyleValue const&>(*this);
}
OverflowStyleValue const& StyleValue::as_overflow() const
{
VERIFY(is_overflow());
return static_cast<OverflowStyleValue const&>(*this);
}
StringStyleValue const& StyleValue::as_string() const
{
VERIFY(is_string());
return static_cast<StringStyleValue const&>(*this);
}
TextDecorationStyleValue const& StyleValue::as_text_decoration() const
{
VERIFY(is_text_decoration());
return static_cast<TextDecorationStyleValue const&>(*this);
}
TransformationStyleValue const& StyleValue::as_transformation() const
{
VERIFY(is_transformation());
return static_cast<TransformationStyleValue const&>(*this);
}
UnsetStyleValue const& StyleValue::as_unset() const
{
VERIFY(is_unset());
return static_cast<UnsetStyleValue const&>(*this);
}
StyleValueList const& StyleValue::as_value_list() const
{
VERIFY(is_value_list());
return static_cast<StyleValueList const&>(*this);
}
String IdentifierStyleValue::to_string() const
{
return CSS::string_from_value_id(m_id);
}
bool IdentifierStyleValue::has_color() const
{
switch (m_id) {
case ValueID::Currentcolor:
case ValueID::LibwebLink:
case ValueID::LibwebPaletteActiveLink:
case ValueID::LibwebPaletteActiveWindowBorder1:
case ValueID::LibwebPaletteActiveWindowBorder2:
case ValueID::LibwebPaletteActiveWindowTitle:
case ValueID::LibwebPaletteBase:
case ValueID::LibwebPaletteBaseText:
case ValueID::LibwebPaletteButton:
case ValueID::LibwebPaletteButtonText:
case ValueID::LibwebPaletteDesktopBackground:
case ValueID::LibwebPaletteFocusOutline:
case ValueID::LibwebPaletteHighlightWindowBorder1:
case ValueID::LibwebPaletteHighlightWindowBorder2:
case ValueID::LibwebPaletteHighlightWindowTitle:
case ValueID::LibwebPaletteHoverHighlight:
case ValueID::LibwebPaletteInactiveSelection:
case ValueID::LibwebPaletteInactiveSelectionText:
case ValueID::LibwebPaletteInactiveWindowBorder1:
case ValueID::LibwebPaletteInactiveWindowBorder2:
case ValueID::LibwebPaletteInactiveWindowTitle:
case ValueID::LibwebPaletteLink:
case ValueID::LibwebPaletteMenuBase:
case ValueID::LibwebPaletteMenuBaseText:
case ValueID::LibwebPaletteMenuSelection:
case ValueID::LibwebPaletteMenuSelectionText:
case ValueID::LibwebPaletteMenuStripe:
case ValueID::LibwebPaletteMovingWindowBorder1:
case ValueID::LibwebPaletteMovingWindowBorder2:
case ValueID::LibwebPaletteMovingWindowTitle:
case ValueID::LibwebPaletteRubberBandBorder:
case ValueID::LibwebPaletteRubberBandFill:
case ValueID::LibwebPaletteRuler:
case ValueID::LibwebPaletteRulerActiveText:
case ValueID::LibwebPaletteRulerBorder:
case ValueID::LibwebPaletteRulerInactiveText:
case ValueID::LibwebPaletteSelection:
case ValueID::LibwebPaletteSelectionText:
case ValueID::LibwebPaletteSyntaxComment:
case ValueID::LibwebPaletteSyntaxControlKeyword:
case ValueID::LibwebPaletteSyntaxIdentifier:
case ValueID::LibwebPaletteSyntaxKeyword:
case ValueID::LibwebPaletteSyntaxNumber:
case ValueID::LibwebPaletteSyntaxOperator:
case ValueID::LibwebPaletteSyntaxPreprocessorStatement:
case ValueID::LibwebPaletteSyntaxPreprocessorValue:
case ValueID::LibwebPaletteSyntaxPunctuation:
case ValueID::LibwebPaletteSyntaxString:
case ValueID::LibwebPaletteSyntaxType:
case ValueID::LibwebPaletteTextCursor:
case ValueID::LibwebPaletteThreedHighlight:
case ValueID::LibwebPaletteThreedShadow1:
case ValueID::LibwebPaletteThreedShadow2:
case ValueID::LibwebPaletteVisitedLink:
case ValueID::LibwebPaletteWindow:
case ValueID::LibwebPaletteWindowText:
return true;
default:
return false;
}
}
Color IdentifierStyleValue::to_color(Layout::NodeWithStyle const& node) const
{
if (id() == CSS::ValueID::Currentcolor) {
if (!node.has_style())
return Color::Black;
return node.computed_values().color();
}
auto& document = node.document();
if (id() == CSS::ValueID::LibwebLink)
return document.link_color();
VERIFY(document.page());
auto palette = document.page()->palette();
switch (id()) {
case CSS::ValueID::LibwebPaletteDesktopBackground:
return palette.color(ColorRole::DesktopBackground);
case CSS::ValueID::LibwebPaletteActiveWindowBorder1:
return palette.color(ColorRole::ActiveWindowBorder1);
case CSS::ValueID::LibwebPaletteActiveWindowBorder2:
return palette.color(ColorRole::ActiveWindowBorder2);
case CSS::ValueID::LibwebPaletteActiveWindowTitle:
return palette.color(ColorRole::ActiveWindowTitle);
case CSS::ValueID::LibwebPaletteInactiveWindowBorder1:
return palette.color(ColorRole::InactiveWindowBorder1);
case CSS::ValueID::LibwebPaletteInactiveWindowBorder2:
return palette.color(ColorRole::InactiveWindowBorder2);
case CSS::ValueID::LibwebPaletteInactiveWindowTitle:
return palette.color(ColorRole::InactiveWindowTitle);
case CSS::ValueID::LibwebPaletteMovingWindowBorder1:
return palette.color(ColorRole::MovingWindowBorder1);
case CSS::ValueID::LibwebPaletteMovingWindowBorder2:
return palette.color(ColorRole::MovingWindowBorder2);
case CSS::ValueID::LibwebPaletteMovingWindowTitle:
return palette.color(ColorRole::MovingWindowTitle);
case CSS::ValueID::LibwebPaletteHighlightWindowBorder1:
return palette.color(ColorRole::HighlightWindowBorder1);
case CSS::ValueID::LibwebPaletteHighlightWindowBorder2:
return palette.color(ColorRole::HighlightWindowBorder2);
case CSS::ValueID::LibwebPaletteHighlightWindowTitle:
return palette.color(ColorRole::HighlightWindowTitle);
case CSS::ValueID::LibwebPaletteMenuStripe:
return palette.color(ColorRole::MenuStripe);
case CSS::ValueID::LibwebPaletteMenuBase:
return palette.color(ColorRole::MenuBase);
case CSS::ValueID::LibwebPaletteMenuBaseText:
return palette.color(ColorRole::MenuBaseText);
case CSS::ValueID::LibwebPaletteMenuSelection:
return palette.color(ColorRole::MenuSelection);
case CSS::ValueID::LibwebPaletteMenuSelectionText:
return palette.color(ColorRole::MenuSelectionText);
case CSS::ValueID::LibwebPaletteWindow:
return palette.color(ColorRole::Window);
case CSS::ValueID::LibwebPaletteWindowText:
return palette.color(ColorRole::WindowText);
case CSS::ValueID::LibwebPaletteButton:
return palette.color(ColorRole::Button);
case CSS::ValueID::LibwebPaletteButtonText:
return palette.color(ColorRole::ButtonText);
case CSS::ValueID::LibwebPaletteBase:
return palette.color(ColorRole::Base);
case CSS::ValueID::LibwebPaletteBaseText:
return palette.color(ColorRole::BaseText);
case CSS::ValueID::LibwebPaletteThreedHighlight:
return palette.color(ColorRole::ThreedHighlight);
case CSS::ValueID::LibwebPaletteThreedShadow1:
return palette.color(ColorRole::ThreedShadow1);
case CSS::ValueID::LibwebPaletteThreedShadow2:
return palette.color(ColorRole::ThreedShadow2);
case CSS::ValueID::LibwebPaletteHoverHighlight:
return palette.color(ColorRole::HoverHighlight);
case CSS::ValueID::LibwebPaletteSelection:
return palette.color(ColorRole::Selection);
case CSS::ValueID::LibwebPaletteSelectionText:
return palette.color(ColorRole::SelectionText);
case CSS::ValueID::LibwebPaletteInactiveSelection:
return palette.color(ColorRole::InactiveSelection);
case CSS::ValueID::LibwebPaletteInactiveSelectionText:
return palette.color(ColorRole::InactiveSelectionText);
case CSS::ValueID::LibwebPaletteRubberBandFill:
return palette.color(ColorRole::RubberBandFill);
case CSS::ValueID::LibwebPaletteRubberBandBorder:
return palette.color(ColorRole::RubberBandBorder);
case CSS::ValueID::LibwebPaletteLink:
return palette.color(ColorRole::Link);
case CSS::ValueID::LibwebPaletteActiveLink:
return palette.color(ColorRole::ActiveLink);
case CSS::ValueID::LibwebPaletteVisitedLink:
return palette.color(ColorRole::VisitedLink);
case CSS::ValueID::LibwebPaletteRuler:
return palette.color(ColorRole::Ruler);
case CSS::ValueID::LibwebPaletteRulerBorder:
return palette.color(ColorRole::RulerBorder);
case CSS::ValueID::LibwebPaletteRulerActiveText:
return palette.color(ColorRole::RulerActiveText);
case CSS::ValueID::LibwebPaletteRulerInactiveText:
return palette.color(ColorRole::RulerInactiveText);
case CSS::ValueID::LibwebPaletteTextCursor:
return palette.color(ColorRole::TextCursor);
case CSS::ValueID::LibwebPaletteFocusOutline:
return palette.color(ColorRole::FocusOutline);
case CSS::ValueID::LibwebPaletteSyntaxComment:
return palette.color(ColorRole::SyntaxComment);
case CSS::ValueID::LibwebPaletteSyntaxNumber:
return palette.color(ColorRole::SyntaxNumber);
case CSS::ValueID::LibwebPaletteSyntaxString:
return palette.color(ColorRole::SyntaxString);
case CSS::ValueID::LibwebPaletteSyntaxType:
return palette.color(ColorRole::SyntaxType);
case CSS::ValueID::LibwebPaletteSyntaxPunctuation:
return palette.color(ColorRole::SyntaxPunctuation);
case CSS::ValueID::LibwebPaletteSyntaxOperator:
return palette.color(ColorRole::SyntaxOperator);
case CSS::ValueID::LibwebPaletteSyntaxKeyword:
return palette.color(ColorRole::SyntaxKeyword);
case CSS::ValueID::LibwebPaletteSyntaxControlKeyword:
return palette.color(ColorRole::SyntaxControlKeyword);
case CSS::ValueID::LibwebPaletteSyntaxIdentifier:
return palette.color(ColorRole::SyntaxIdentifier);
case CSS::ValueID::LibwebPaletteSyntaxPreprocessorStatement:
return palette.color(ColorRole::SyntaxPreprocessorStatement);
case CSS::ValueID::LibwebPaletteSyntaxPreprocessorValue:
return palette.color(ColorRole::SyntaxPreprocessorValue);
default:
return {};
}
}
ImageStyleValue::ImageStyleValue(const AK::URL& url, DOM::Document& document)
: StyleValue(Type::Image)
, m_url(url)
, m_document(document)
{
auto request = LoadRequest::create_for_url_on_page(url, document.page());
set_resource(ResourceLoader::the().load_resource(Resource::Type::Image, request));
}
void ImageStyleValue::resource_did_load()
{
if (!m_document)
return;
m_bitmap = resource()->bitmap();
// FIXME: Do less than a full repaint if possible?
if (m_document->browsing_context())
m_document->browsing_context()->set_needs_display({});
}
}
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