From 6482e313d646e25368548eb734a8ed49a4dfcee7 Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Mon, 24 Nov 2014 21:49:55 +0530
Subject: [PATCH] Implement implicit form submission

---
 components/script/dom/activation.rs       |  3 +++
 components/script/dom/htmlinputelement.rs | 17 ++++++++++++++++-
 components/script/script_task.rs          |  7 +++++--
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/components/script/dom/activation.rs b/components/script/dom/activation.rs
index 267ca5d58a1..e4a54112e58 100644
--- a/components/script/dom/activation.rs
+++ b/components/script/dom/activation.rs
@@ -25,6 +25,9 @@ pub trait Activatable : Copy {
     // https://html.spec.whatwg.org/multipage/interaction.html#run-post-click-activation-steps
     fn activation_behavior(&self);
 
+    // https://html.spec.whatwg.org/multipage/forms.html#implicit-submission
+    fn implicit_submission(&self, ctrlKey: bool, shiftKey: bool, altKey: bool, metaKey: bool);
+
     // https://html.spec.whatwg.org/multipage/interaction.html#run-synthetic-click-activation-steps
     fn synthetic_click_activation(&self, ctrlKey: bool, shiftKey: bool, altKey: bool, metaKey: bool) {
         let element = self.as_element().root();
diff --git a/components/script/dom/htmlinputelement.rs b/components/script/dom/htmlinputelement.rs
index a0b02f6a3d2..c5e103eaa48 100644
--- a/components/script/dom/htmlinputelement.rs
+++ b/components/script/dom/htmlinputelement.rs
@@ -20,7 +20,7 @@ use dom::bindings::js::{JS, JSRef, Root, Temporary, OptionalRootable, ResultRoot
 use dom::bindings::utils::{Reflectable, Reflector};
 use dom::document::{Document, DocumentHelpers};
 use dom::element::{AttributeHandlers, Element, HTMLInputElementTypeId};
-use dom::element::RawLayoutElementHelpers;
+use dom::element::{RawLayoutElementHelpers, ActivationElementHelpers};
 use dom::event::{Event, Bubbles, NotCancelable, EventHelpers};
 use dom::eventtarget::{EventTarget, NodeTargetTypeId};
 use dom::htmlelement::HTMLElement;
@@ -695,4 +695,19 @@ impl<'a> Activatable for JSRef<'a, HTMLInputElement> {
             _ => ()
         }
     }
+
+    // https://html.spec.whatwg.org/multipage/forms.html#implicit-submission
+    fn implicit_submission(&self, ctrlKey: bool, shiftKey: bool, altKey: bool, metaKey: bool) {
+        let doc = document_from_node(*self).root();
+        // FIXME (#4082) use a custom iterator
+        let submits = doc.QuerySelectorAll("input[type=submit]".to_string()).unwrap().root();
+        // XXXManishearth there may be a more efficient way of doing this (#3553)
+        let owner = self.form_owner();
+        if owner == None || ElementCast::from_ref(*self).click_in_progress() {
+            return;
+        }
+        submits.into_vec().iter()
+               .filter_map(|t| HTMLInputElementCast::to_ref(*t.root()))
+               .find(|r| r.form_owner() == owner).map(|s| s.synthetic_click_activation(ctrlKey, shiftKey, altKey, metaKey));
+    }
 }
diff --git a/components/script/script_task.rs b/components/script/script_task.rs
index 9ccf7653af5..f0352052df9 100644
--- a/components/script/script_task.rs
+++ b/components/script/script_task.rs
@@ -915,11 +915,14 @@ impl ScriptTask {
         // I'm dispatching it after the key event so the script has a chance to cancel it
         // https://www.w3.org/Bugs/Public/show_bug.cgi?id=27337
         match key {
-            Key::KeySpace | Key::KeyEnter if !prevented && state == Released => {
-                // TODO handle space and enter slightly differently
+            Key::KeySpace if !prevented && state == Released => {
                 let maybe_elem: Option<JSRef<Element>> = ElementCast::to_ref(target);
                 maybe_elem.map(|el| el.as_maybe_activatable().map(|a| a.synthetic_click_activation(ctrl, alt, shift, meta)));
             }
+            Key::KeyEnter if !prevented && state == Released => {
+                let maybe_elem: Option<JSRef<Element>> = ElementCast::to_ref(target);
+                maybe_elem.map(|el| el.as_maybe_activatable().map(|a| a.implicit_submission(ctrl, alt, shift, meta)));
+            }
             _ => ()
         }
         window.flush_layout();