Stowage/ladybird
2
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-12-07 21:59:54 +00:00
Code Issues Projects Releases Packages Wiki Activity

LibWeb: Support non-fixed <random-value-sharing>

Browse source 
This works by generating random values using XorShift128PlusRNG at
compute time and then caching them on the document using the relevant
random-caching-key
This commit is contained in:
Callum Law 2025-11-05 13:27:48 +13:00 • committed by Sam Atkins
parent 86e6aa0291
commit 12e8f503aa
Notes: github-actions[bot] 2025-12-01 11:01:47 +00:00
15 changed files with 226 additions and 54 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Libraries/LibWeb/DOM/Element.cpp
View file

@ -33,6 +33,7 @@
#include <LibWeb/CSS/StyleValues/KeywordStyleValue.h>
#include <LibWeb/CSS/StyleValues/LengthStyleValue.h>
#include <LibWeb/CSS/StyleValues/NumberStyleValue.h>
#include <LibWeb/CSS/StyleValues/RandomValueSharingStyleValue.h>
#include <LibWeb/DOM/Attr.h>
#include <LibWeb/DOM/DOMTokenList.h>
#include <LibWeb/DOM/Document.h>
@ -4311,6 +4312,19 @@ GC::Ref<CSS::StylePropertyMapReadOnly> Element::computed_style_map()
return *m_computed_style_map_cache;
}
double Element::ensure_css_random_base_value(CSS::RandomCachingKey const& random_caching_key)
{
// NB: We cache element-shared random base values on the Document and non-element-shared ones on the Element itself
// so that when an element is removed it takes its non-shared cache with it.
if (!random_caching_key.element_id.has_value())
return document().ensure_element_shared_css_random_base_value(random_caching_key);
return m_element_specific_css_random_base_value_cache.ensure(random_caching_key, []() {
static XorShift128PlusRNG random_number_generator;
return random_number_generator.get();
});
}
// The element to inherit style from.
// If a pseudo-element is specified, this will return the element itself.
// Otherwise, if this element is slotted somewhere, it will return the slot's element to inherit style from.