implment activation of buttonelement

ignore button type first

components/script/dom/htmlbuttonelement.rs

@@ -2,20 +2,21 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+use dom::activation::Activatable;
 use dom::attr::Attr;
 use dom::attr::AttrHelpers;
 use dom::bindings::codegen::Bindings::HTMLButtonElementBinding;
 use dom::bindings::codegen::Bindings::HTMLButtonElementBinding::HTMLButtonElementMethods;
-use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, NodeCast};
+use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, HTMLButtonElementCast, NodeCast};
 use dom::bindings::codegen::InheritTypes::{HTMLButtonElementDerived, HTMLFieldSetElementDerived};
 use dom::bindings::js::{JSRef, Temporary};
 use dom::document::Document;
-use dom::element::{AttributeHandlers, Element};
+use dom::element::{AttributeHandlers, Element, ElementTypeId};
+use dom::element::ActivationElementHelpers;
 use dom::eventtarget::{EventTarget, EventTargetTypeId};
-use dom::element::ElementTypeId;
 use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
 use dom::htmlformelement::{FormControl};
-use dom::node::{DisabledStateHelpers, Node, NodeHelpers, NodeTypeId, window_from_node};
+use dom::node::{DisabledStateHelpers, Node, NodeHelpers, NodeTypeId, document_from_node, window_from_node};
 use dom::validitystate::ValidityState;
 use dom::virtualmethods::VirtualMethods;
 
@@ -159,3 +160,59 @@ impl<'a> FormControl<'a> for JSRef<'a, HTMLButtonElement> {
     }
 }
 
+impl<'a> Activatable for JSRef<'a, HTMLButtonElement> {
+    fn as_element(&self) -> Temporary<Element> {
+        Temporary::from_rooted(ElementCast::from_ref(*self))
+    }
+
+    fn is_instance_activatable(&self) -> bool {
+        match self.button_type.get() {
+            //https://html.spec.whatwg.org/multipage/forms.html#the-button-element
+            _ => {
+                let node: JSRef<Node> = NodeCast::from_ref(*self);
+                !(node.get_disabled_state())
+            }
+        }
+    }
+
+    // https://html.spec.whatwg.org/multipage/interaction.html#run-pre-click-activation-steps
+    // https://html.spec.whatwg.org/multipage/forms.html#the-button-element:activation-behavior
+    fn pre_click_activation(&self) {
+    }
+
+    // https://html.spec.whatwg.org/multipage/interaction.html#run-canceled-activation-steps
+    fn canceled_activation(&self) {
+    }
+
+    // https://html.spec.whatwg.org/multipage/interaction.html#run-post-click-activation-steps
+    fn activation_behavior(&self) {
+        let ty = self.button_type.get();
+        match ty {
+            _ => ()
+        }
+    }
+
+    // https://html.spec.whatwg.org/multipage/forms.html#implicit-submission
+    #[allow(unsafe_blocks)]
+    fn implicit_submission(&self, ctrlKey: bool, shiftKey: bool, altKey: bool, metaKey: bool) {
+        let doc = document_from_node(*self).root();
+        let node: JSRef<Node> = NodeCast::from_ref(doc.r());
+        let owner = self.form_owner();
+        let elem: JSRef<Element> = ElementCast::from_ref(*self);
+        if owner.is_none() || elem.click_in_progress() {
+            return;
+        }
+        // This is safe because we are stopping after finding the first element
+        // and only then performing actions which may modify the DOM tree
+        unsafe {
+            node.query_selector_iter("button[type=submit]".to_owned()).unwrap()
+                .filter_map(|t| {
+                    let h: Option<JSRef<HTMLButtonElement>> = HTMLButtonElementCast::to_ref(t);
+                    h
+                })
+                .find(|r| r.form_owner() == owner)
+                .map(|&:s| s.synthetic_click_activation(ctrlKey, shiftKey, altKey, metaKey));
+        }
+    }
+}
+