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LibWeb: Flesh out "document visibility" state a bit more
We can now "update the visibility state", which also causes `visibilitychange` events to fire on the document. This still needs GUI integration work at the BrowsingContext level.
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3 changed files with 28 additions and 3 deletions
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@ -1578,13 +1578,31 @@ Bindings::LocationObject* Document::location()
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// https://html.spec.whatwg.org/multipage/interaction.html#dom-document-hidden
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bool Document::hidden() const
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{
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return false;
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return visibility_state() == "hidden";
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}
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// https://html.spec.whatwg.org/multipage/interaction.html#dom-document-visibilitystate
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String Document::visibility_state() const
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{
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return hidden() ? "hidden" : "visible";
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return m_visibility_state;
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}
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// https://html.spec.whatwg.org/multipage/interaction.html#update-the-visibility-state
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void Document::update_the_visibility_state(String visibility_state)
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{
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// 1. If document's visibility state equals visibilityState, then return.
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if (m_visibility_state == visibility_state)
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return;
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// 2. Set document's visibility state to visibilityState.
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m_visibility_state = visibility_state;
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// FIXME: 3. Run any page visibility change steps which may be defined in other specifications, with visibility state and document.
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// 4. Fire an event named visibilitychange at document, with its bubbles attribute initialized to true.
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auto event = DOM::Event::create(window(), HTML::EventNames::visibilitychange);
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event->set_bubbles(true);
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dispatch_event(event);
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}
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// https://drafts.csswg.org/cssom-view/#run-the-resize-steps
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@ -317,6 +317,9 @@ public:
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bool hidden() const;
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String visibility_state() const;
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// https://html.spec.whatwg.org/multipage/interaction.html#update-the-visibility-state
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void update_the_visibility_state(String visibility_state);
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void run_the_resize_steps();
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void run_the_scroll_steps();
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@ -502,6 +505,9 @@ private:
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// https://html.spec.whatwg.org/#completely-loaded-time
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Optional<AK::Time> m_completely_loaded_time;
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// https://html.spec.whatwg.org/multipage/interaction.html#visibility-state
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String m_visibility_state { "hidden" };
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};
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}
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@ -57,7 +57,8 @@ namespace Web::HTML::EventNames {
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__ENUMERATE_HTML_EVENT(submit) \
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__ENUMERATE_HTML_EVENT(toggle) \
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__ENUMERATE_HTML_EVENT(unhandledrejection) \
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__ENUMERATE_HTML_EVENT(unload)
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__ENUMERATE_HTML_EVENT(unload) \
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__ENUMERATE_HTML_EVENT(visibilitychange)
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#define __ENUMERATE_HTML_EVENT(name) extern FlyString name;
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ENUMERATE_HTML_EVENTS
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