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LibWeb: Implement the :playing and :paused pseudo-classes

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These match media elements (`<video>` and `<audio>`) which are playing
or paused, respectively.
This commit is contained in:
Sam Atkins 2023-08-01 12:31:41 +01:00 • committed by Tim Flynn
parent a336fe4fc4
commit 4df5e24926
6 changed files with 34 additions and 1 deletions
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16
Userland/Libraries/LibWeb/CSS/SelectorEngine.cpp
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@ -17,6 +17,7 @@
#include <LibWeb/HTML/HTMLFieldSetElement.h>
#include <LibWeb/HTML/HTMLHtmlElement.h>
#include <LibWeb/HTML/HTMLInputElement.h>
#include <LibWeb/HTML/HTMLMediaElement.h>
#include <LibWeb/HTML/HTMLOptGroupElement.h>
#include <LibWeb/HTML/HTMLOptionElement.h>
#include <LibWeb/HTML/HTMLProgressElement.h>
@ -289,7 +290,7 @@ static inline bool matches_pseudo_class(CSS::Selector::SimpleSelector::PseudoCla
case CSS::Selector::SimpleSelector::PseudoClass::Type::NthChild:
case CSS::Selector::SimpleSelector::PseudoClass::Type::NthLastChild:
case CSS::Selector::SimpleSelector::PseudoClass::Type::NthOfType:
case CSS::Selector::SimpleSelector::PseudoClass::Type::NthLastOfType:
case CSS::Selector::SimpleSelector::PseudoClass::Type::NthLastOfType: {
auto const step_size = pseudo_class.nth_child_pattern.step_size;
auto const offset = pseudo_class.nth_child_pattern.offset;
if (step_size == 0 && offset == 0)
@ -376,6 +377,19 @@ static inline bool matches_pseudo_class(CSS::Selector::SimpleSelector::PseudoCla
// Otherwise, we start at "offset" and count forwards.
return index >= offset && canonical_modulo(index - offset, step_size) == 0;
}
case CSS::Selector::SimpleSelector::PseudoClass::Type::Playing: {
if (!is<HTML::HTMLMediaElement>(element))
return false;
auto const& media_element = static_cast<HTML::HTMLMediaElement const&>(element);
return !media_element.paused();
}
case CSS::Selector::SimpleSelector::PseudoClass::Type::Paused: {
if (!is<HTML::HTMLMediaElement>(element))
return false;
auto const& media_element = static_cast<HTML::HTMLMediaElement const&>(element);
return media_element.paused();
}
}
return false;
}