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LibWeb: Implement a slow but functional HTMLCollection :^)

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HTMLCollection is an awkward legacy interface from the DOM spec.

It provides a live view of a DOM subtree, with some kind of filtering
that determines which elements are part of the collection.

We now return HTMLCollection objects from these APIs:

- getElementsByClassName()
- getElementsByName()
- getElementsByTagName()

This initial implementation does not do any kind of caching, since that
is quite a tricky problem, and there will be plenty of time for tricky
problems later on when the engine is more mature.
This commit is contained in:
Andreas Kling 2021-04-22 21:11:20 +02:00
parent 49f3d88baf
commit e4df1b223f
14 changed files with 207 additions and 55 deletions
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6
Userland/Libraries/LibWeb/DOM/Document.h
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@ -136,9 +136,9 @@ public:
void schedule_style_update();
void schedule_forced_layout();
NonnullRefPtrVector<Element> get_elements_by_name(const String&) const;
NonnullRefPtrVector<Element> get_elements_by_tag_name(const FlyString&) const;
NonnullRefPtrVector<Element> get_elements_by_class_name(const FlyString&) const;
NonnullRefPtr<HTMLCollection> get_elements_by_name(String const&);
NonnullRefPtr<HTMLCollection> get_elements_by_tag_name(FlyString const&);
NonnullRefPtr<HTMLCollection> get_elements_by_class_name(FlyString const&);
const String& source() const { return m_source; }
void set_source(const String& source) { m_source = source; }