Implements FormControl for HTMLTextAreaElement

1 files changed, 53 insertions, 4 deletions

diff --git a/components/script/dom/htmltextareaelement.rs b/components/script/dom/htmltextareaelement.rs
index 05d3a5d0868..a22279a3deb 100644
--- a/components/script/dom/htmltextareaelement.rs
+++ b/components/script/dom/htmltextareaelement.rs
@@ -5,20 +5,22 @@
 use dom::attr::{Attr, AttrValue};
 use dom::attr::AttrHelpers;
 use dom::bindings::cell::DOMRefCell;
+use dom::bindings::codegen::Bindings::DocumentBinding::DocumentMethods;
 use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::codegen::Bindings::HTMLTextAreaElementBinding;
 use dom::bindings::codegen::Bindings::HTMLTextAreaElementBinding::HTMLTextAreaElementMethods;
 use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
 use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, NodeCast};
 use dom::bindings::codegen::InheritTypes::{HTMLTextAreaElementDerived, HTMLFieldSetElementDerived};
-use dom::bindings::codegen::InheritTypes::{KeyboardEventCast, TextDerived};
-use dom::bindings::js::{JS, JSRef, Temporary};
+use dom::bindings::codegen::InheritTypes::{KeyboardEventCast, TextDerived, HTMLFormElementCast};
+use dom::bindings::js::{JS, JSRef, Temporary, OptionalRootable};
 use dom::bindings::utils::{Reflectable, Reflector};
 use dom::document::{Document, DocumentHelpers};
-use dom::element::{AttributeHandlers, HTMLTextAreaElementTypeId};
+use dom::element::{AttributeHandlers, HTMLTextAreaElementTypeId, Element};
 use dom::event::Event;
 use dom::eventtarget::{EventTarget, NodeTargetTypeId};
 use dom::htmlelement::HTMLElement;
+use dom::htmlformelement::{FormControl, HTMLFormElement};
 use dom::keyboardevent::KeyboardEvent;
 use dom::node::{DisabledStateHelpers, Node, NodeHelpers, OtherNodeDamage, ElementNodeTypeId};
 use dom::node::{document_from_node};
@@ -103,6 +105,12 @@ impl<'a> HTMLTextAreaElementMethods for JSRef<'a, HTMLTextAreaElement> {
     // https://html.spec.whatwg.org/multipage/forms.html#dom-textarea-placeholder
     make_setter!(SetPlaceholder, "placeholder")
 
+    // https://html.spec.whatwg.org/multipage/forms.html#attr-textarea-readonly
+    make_bool_getter!(ReadOnly)
+
+    // https://html.spec.whatwg.org/multipage/forms.html#attr-textarea-readonly
+    make_bool_setter!(SetReadOnly, "readOnly")
+
     // https://html.spec.whatwg.org/multipage/forms.html#dom-textarea-required
     make_bool_getter!(Required)
 
@@ -248,7 +256,7 @@ impl<'a> VirtualMethods for JSRef<'a, HTMLTextAreaElement> {
         }
 
         if child.is_text() {
-            self.SetValue(self.DefaultValue());
+            self.reset();
         }
     }
 
@@ -287,3 +295,44 @@ impl Reflectable for HTMLTextAreaElement {
         self.htmlelement.reflector()
     }
 }
+
+impl<'a> FormControl<'a> for JSRef<'a, HTMLTextAreaElement> {
+    // FIXME: This is wrong (https://github.com/servo/servo/issues/3553)
+    //        but we need html5ever to do it correctly
+    fn form_owner(self) -> Option<Temporary<HTMLFormElement>> {
+        // https://html.spec.whatwg.org/multipage/forms.html#reset-the-form-owner
+        let elem: JSRef<Element> = ElementCast::from_ref(self);
+        let owner = elem.get_string_attribute(&atom!("form"));
+        if !owner.is_empty() {
+            let doc = document_from_node(self).root();
+            let owner = doc.GetElementById(owner).root();
+            match owner {
+                Some(o) => {
+                    let maybe_form: Option<JSRef<HTMLFormElement>> = HTMLFormElementCast::to_ref(*o);
+                    if maybe_form.is_some() {
+                        return maybe_form.map(Temporary::from_rooted);
+                    }
+                },
+                _ => ()
+            }
+        }
+        let node: JSRef<Node> = NodeCast::from_ref(self);
+        node.ancestors().filter_map(|a| HTMLFormElementCast::to_ref(a)).next()
+            .map(Temporary::from_rooted)
+    }
+
+    fn to_element(self) -> JSRef<'a, Element> {
+        ElementCast::from_ref(self)
+    }
+
+    // https://html.spec.whatwg.org/multipage/forms.html#concept-fe-mutable
+    fn mutable(self) -> bool {
+        // https://html.spec.whatwg.org/multipage/forms.html#the-textarea-element:concept-fe-mutable
+        !(self.Disabled() || self.ReadOnly())
+    }
+
+    fn reset(self) {
+        self.SetValue(self.DefaultValue());
+        self.value_changed.set(false);
+    }
+}