LibWeb: Implement HTMLOptionElement.selected

Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2020, the SerenityOS developers.
+ * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -15,4 +16,43 @@ HTMLOptionElement::HTMLOptionElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLOptionElement::~HTMLOptionElement() = default;
 
+void HTMLOptionElement::parse_attribute(FlyString const& name, String const& value)
+{
+    HTMLElement::parse_attribute(name, value);
+
+    if (name == HTML::AttributeNames::selected) {
+        // Except where otherwise specified, when the element is created, its selectedness must be set to true
+        // if the element has a selected attribute. Whenever an option element's selected attribute is added,
+        // if its dirtiness is false, its selectedness must be set to true.
+        if (!m_dirty)
+            m_selected = true;
+    }
+}
+
+void HTMLOptionElement::did_remove_attribute(FlyString const& name)
+{
+    HTMLElement::did_remove_attribute(name);
+
+    if (name == HTML::AttributeNames::selected) {
+        // Whenever an option element's selected attribute is removed, if its dirtiness is false, its selectedness must be set to false.
+        if (!m_dirty)
+            m_selected = false;
+    }
+}
+
+// https://html.spec.whatwg.org/multipage/form-elements.html#dom-option-selected
+void HTMLOptionElement::set_selected(bool selected)
+{
+    // On setting, it must set the element's selectedness to the new value, set its dirtiness to true, and then cause the element to ask for a reset.
+    m_selected = selected;
+    m_dirty = true;
+    ask_for_a_reset();
+}
+
+// https://html.spec.whatwg.org/multipage/form-elements.html#ask-for-a-reset
+void HTMLOptionElement::ask_for_a_reset()
+{
+    // FIXME: Implement this operation.
+}
+
 }

Userland/Libraries/LibWeb/HTML/HTMLOptionElement.h

@@ -18,7 +18,17 @@ public:
     HTMLOptionElement(DOM::Document&, DOM::QualifiedName);
     virtual ~HTMLOptionElement() override;
 
+    bool selected() const { return m_selected; }
+    void set_selected(bool);
+
 private:
+    friend class HTMLSelectElement;
+
+    void parse_attribute(FlyString const& name, String const& value) override;
+    void did_remove_attribute(FlyString const& name) override;
+
+    void ask_for_a_reset();
+
     // https://html.spec.whatwg.org/multipage/form-elements.html#concept-option-selectedness
     bool m_selected { false };
 

Userland/Libraries/LibWeb/HTML/HTMLOptionElement.idl

@@ -5,4 +5,6 @@ interface HTMLOptionElement : HTMLElement {
     [Reflect] attribute boolean disabled;
     [Reflect=selected] attribute boolean defaultSelected;
 
+    attribute boolean selected;
+
 };