LibWeb: Add innerText attribute of HTMLScriptElement for TrustedTypes

Author: https://github.com/tete17
Commit: f7c05013c7
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6058
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/HTML/HTMLElement.h

@@ -219,6 +219,8 @@ protected:
     void set_inert(bool inert) { m_inert = inert; }
     void set_subtree_inertness(bool is_inert);
 
+    [[nodiscard]] Utf16String get_the_text_steps();
+
 private:
     virtual bool is_html_element() const final { return true; }
 
@@ -229,7 +231,6 @@ private:
     virtual void did_receive_focus() override;
     virtual void did_lose_focus() override;
 
-    [[nodiscard]] Utf16String get_the_text_steps();
     GC::Ref<DOM::DocumentFragment> rendered_text_fragment(Utf16View const& input);
 
     GC::Ptr<DOM::NodeList> m_labels;

Libraries/LibWeb/HTML/HTMLScriptElement.cpp

@@ -705,6 +705,33 @@ WebIDL::ExceptionOr<void> HTMLScriptElement::set_text_content(TrustedTypes::Trus
     return {};
 }
 
+// https://w3c.github.io/trusted-types/dist/spec/#the-innerText-idl-attribute
+TrustedTypes::TrustedScriptOrString HTMLScriptElement::inner_text()
+{
+    // 1. Return the result of running get text content with this.
+    return get_the_text_steps();
+}
+
+// https://w3c.github.io/trusted-types/dist/spec/#the-innerText-idl-attribute
+WebIDL::ExceptionOr<void> HTMLScriptElement::set_inner_text(TrustedTypes::TrustedScriptOrString text)
+{
+    // 1. Let value be the result of calling Get Trusted Type compliant string with
+    //    TrustedScript, this’s relevant global object, the given value, HTMLScriptElement innerText, and script.
+    auto const value = TRY(TrustedTypes::get_trusted_type_compliant_string(
+        TrustedTypes::TrustedTypeName::TrustedScript,
+        HTML::relevant_global_object(*this),
+        text,
+        TrustedTypes::InjectionSink::HTMLScriptElementinnerText,
+        TrustedTypes::Script.to_string()));
+
+    // 2. Set this’s script text value to value.
+    m_script_text = value;
+
+    // 3. Run set the inner text steps with this and value.
+    HTMLElement::set_inner_text(value);
+    return {};
+}
+
 // https://html.spec.whatwg.org/multipage/scripting.html#dom-script-async
 bool HTMLScriptElement::async() const
 {

Libraries/LibWeb/HTML/HTMLScriptElement.h

@@ -68,6 +68,9 @@ public:
     Variant<GC::Root<TrustedTypes::TrustedScript>, Utf16String, Empty> text_content() const;
     WebIDL::ExceptionOr<void> set_text_content(TrustedTypes::TrustedScriptOrString);
 
+    TrustedTypes::TrustedScriptOrString inner_text();
+    WebIDL::ExceptionOr<void> set_inner_text(TrustedTypes::TrustedScriptOrString);
+
     [[nodiscard]] bool async() const;
     void set_async(bool);
 

Libraries/LibWeb/HTML/HTMLScriptElement.idl

@@ -21,6 +21,7 @@ interface HTMLScriptElement : HTMLElement {
     [CEReactions] attribute (TrustedScript or Utf16DOMString) text;
     [CEReactions] attribute (TrustedScriptURL or Utf16USVString) src;
     [CEReactions] attribute (TrustedScript or Utf16DOMString)? textContent;
+    [CEReactions] attribute (TrustedScript or Utf16DOMString) innerText;
 
     static boolean supports(DOMString type);