mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-08-07 08:39:22 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

LibWeb/CSS: Start parsing the color() function

Browse source 
This is really bare bone as we only support the `xyz-d50` color space
for the moment.

It makes us pass the following WPT tests:
 - css/css-color/predefined-016.html
 - css/css-color/xyz-d50-001.html
 - css/css-color/xyz-d50-002.html
This commit is contained in:
Lucas CHOLLET 2024-10-27 00:42:13 -04:00 • committed by Andreas Kling
commit 48bbebc636
Notes: github-actions[bot] 2024-10-28 22:33:33 +00:00
7 changed files with 166 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

64
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
View file

@ -44,6 +44,7 @@
#include <LibWeb/CSS/StyleValues/BackgroundSizeStyleValue.h>
#include <LibWeb/CSS/StyleValues/BasicShapeStyleValue.h>
#include <LibWeb/CSS/StyleValues/BorderRadiusStyleValue.h>
#include <LibWeb/CSS/StyleValues/CSSColor.h>
#include <LibWeb/CSS/StyleValues/CSSColorValue.h>
#include <LibWeb/CSS/StyleValues/CSSHSL.h>
#include <LibWeb/CSS/StyleValues/CSSHWB.h>
@ -3387,6 +3388,66 @@ RefPtr<CSSStyleValue> Parser::parse_oklch_color_value(TokenStream<ComponentValue
return CSSOKLCH::create(l.release_nonnull(), c.release_nonnull(), h.release_nonnull(), alpha.release_nonnull());
}
// https://www.w3.org/TR/css-color-4/#funcdef-color
RefPtr<CSSStyleValue> Parser::parse_color_function(TokenStream<ComponentValue>& outer_tokens)
{
// color() = color( <colorspace-params> [ / [ <alpha-value> | none ] ]? )
// <colorspace-params> = [ <predefined-rgb-params> | <xyz-params>]
// <predefined-rgb-params> = <predefined-rgb> [ <number> | <percentage> | none ]{3}
// <predefined-rgb> = srgb | srgb-linear | display-p3 | a98-rgb | prophoto-rgb | rec2020
// <xyz-params> = <xyz-space> [ <number> | <percentage> | none ]{3}
// <xyz-space> = xyz | xyz-d50 | xyz-d65
auto transaction = outer_tokens.begin_transaction();
outer_tokens.discard_whitespace();
auto const& function_token = outer_tokens.consume_a_token();
if (!function_token.is_function("color"sv))
return {};
auto inner_tokens = TokenStream { function_token.function().value };
inner_tokens.discard_whitespace();
auto maybe_color_space = inner_tokens.consume_a_token();
inner_tokens.discard_whitespace();
if (!any_of(CSSColor::s_supported_color_space, [&](auto supported) { return maybe_color_space.is_ident(supported); }))
return {};
auto const& color_space = maybe_color_space.token().ident();
auto c1 = parse_number_percentage_value(inner_tokens);
if (!c1)
return {};
inner_tokens.discard_whitespace();
auto c2 = parse_number_percentage_value(inner_tokens);
if (!c2)
return {};
inner_tokens.discard_whitespace();
auto c3 = parse_number_percentage_value(inner_tokens);
if (!c3)
return {};
inner_tokens.discard_whitespace();
RefPtr<CSSStyleValue> alpha;
if (inner_tokens.has_next_token()) {
alpha = parse_solidus_and_alpha_value(inner_tokens);
if (!alpha || inner_tokens.has_next_token())
return {};
}
if (!alpha)
alpha = NumberStyleValue::create(1);
transaction.commit();
return CSSColor::create(color_space.to_ascii_lowercase(),
c1.release_nonnull(),
c2.release_nonnull(),
c3.release_nonnull(),
alpha.release_nonnull());
}
// https://www.w3.org/TR/css-color-4/#color-syntax
RefPtr<CSSStyleValue> Parser::parse_color_value(TokenStream<ComponentValue>& tokens)
{
@ -3401,6 +3462,9 @@ RefPtr<CSSStyleValue> Parser::parse_color_value(TokenStream<ComponentValue>& tok
}
// Functions
if (auto color = parse_color_function(tokens))
return color;
if (auto rgb = parse_rgb_color_value(tokens))
return rgb;
if (auto hsl = parse_hsl_color_value(tokens))