Implement RadioNodeList

6 files changed, 175 insertions, 11 deletions

diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index 0a9a7217c53..56693280f2f 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -341,6 +341,7 @@ pub mod performance;
 pub mod performancetiming;
 pub mod processinginstruction;
 pub mod progressevent;
+pub mod radionodelist;
 pub mod range;
 pub mod screen;
 pub mod servohtmlparser;
diff --git a/components/script/dom/nodelist.rs b/components/script/dom/nodelist.rs
index 6747ee5a948..5987b1b26f0 100644
--- a/components/script/dom/nodelist.rs
+++ b/components/script/dom/nodelist.rs
@@ -28,7 +28,7 @@ pub struct NodeList {
 
 impl NodeList {
     #[allow(unrooted_must_root)]
-    fn new_inherited(list_type: NodeListType) -> NodeList {
+    pub fn new_inherited(list_type: NodeListType) -> NodeList {
         NodeList {
             reflector_: Reflector::new(),
             list_type: list_type,
@@ -36,8 +36,7 @@ impl NodeList {
     }
 
     #[allow(unrooted_must_root)]
-    pub fn new(window: &Window,
-               list_type: NodeListType) -> Root<NodeList> {
+    pub fn new(window: &Window, list_type: NodeListType) -> Root<NodeList> {
         reflect_dom_object(box NodeList::new_inherited(list_type),
                            GlobalRef::Window(window), NodeListBinding::Wrap)
     }
@@ -93,6 +92,10 @@ impl NodeList {
             panic!("called as_children_list() on a simple node list")
         }
     }
+
+    pub fn get_list_type(&self) -> &NodeListType {
+        &self.list_type
+    }
 }
 
 #[derive(JSTraceable, HeapSizeOf)]
@@ -114,6 +117,10 @@ impl ChildrenList {
         }
     }
 
+    pub fn get_parent_node(&self) -> &Node {
+        &*self.node
+    }
+
     pub fn len(&self) -> u32 {
         self.node.children_count()
     }
diff --git a/components/script/dom/radionodelist.rs b/components/script/dom/radionodelist.rs
new file mode 100644
index 00000000000..ebb9909f1d6
--- /dev/null
+++ b/components/script/dom/radionodelist.rs
@@ -0,0 +1,152 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * 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::bindings::codegen::Bindings::HTMLInputElementBinding::HTMLInputElementMethods;
+use dom::bindings::codegen::Bindings::NodeListBinding::NodeListMethods;
+use dom::bindings::codegen::Bindings::RadioNodeListBinding;
+use dom::bindings::codegen::Bindings::RadioNodeListBinding::RadioNodeListMethods;
+use dom::bindings::global::GlobalRef;
+use dom::bindings::inheritance::Castable;
+use dom::bindings::js::Root;
+use dom::bindings::reflector::reflect_dom_object;
+use dom::htmlinputelement::HTMLInputElement;
+use dom::node::Node;
+use dom::nodelist::{NodeList, NodeListType};
+use dom::window::Window;
+use util::str::DOMString;
+
+#[dom_struct]
+pub struct RadioNodeList {
+    node_list: NodeList,
+}
+
+impl RadioNodeList {
+    #[allow(unrooted_must_root)]
+    fn new_inherited(list_type: NodeListType) -> RadioNodeList {
+        RadioNodeList {
+            node_list: NodeList::new_inherited(list_type)
+        }
+    }
+
+    #[allow(unrooted_must_root)]
+    pub fn new(window: &Window, list_type: NodeListType) -> Root<RadioNodeList> {
+        reflect_dom_object(box RadioNodeList::new_inherited(list_type),
+                           GlobalRef::Window(window),
+                           RadioNodeListBinding::Wrap)
+    }
+
+    // FIXME: This shouldn't need to be implemented here since NodeList (the parent of
+    // RadioNodeList) implements Length
+    // https://github.com/servo/servo/issues/5875
+    pub fn Length(&self) -> u32 {
+        self.node_list.Length()
+    }
+}
+
+impl RadioNodeListMethods for RadioNodeList {
+    // https://html.spec.whatwg.org/multipage/#dom-radionodelist-value
+    fn Value(&self) -> DOMString {
+        match *self.upcast::<NodeList>().get_list_type() {
+            NodeListType::Simple(ref v) => {
+                v.iter().filter_map(|node| {
+                    // Step 1
+                    node.downcast::<HTMLInputElement>().and_then(|input| {
+                        match input.type_() {
+                            atom!("radio") if input.Checked() => {
+                                // Step 3-4
+                                let value = input.Value();
+                                Some(if value.is_empty() { DOMString::from("on") } else { value })
+                            }
+                            _ => None
+                        }
+                    })
+                }).next()
+                // Step 2
+                  .unwrap_or(DOMString::from(""))
+            }
+            NodeListType::Children(ref cl) => {
+                cl.get_parent_node().traverse_preorder().filter_map(|node| {
+                    // Step 1
+                    node.downcast::<HTMLInputElement>().and_then(|input| {
+                        match input.type_() {
+                            atom!("radio") if input.Checked() => {
+                                // Step 3-4
+                                let value = input.Value();
+                                Some(if value.is_empty() { DOMString::from("on") } else { value })
+                            }
+                            _ => None
+                        }
+                    })
+                }).next()
+                // Step 2
+                  .unwrap_or(DOMString::from(""))
+            }
+        }
+    }
+
+    // https://html.spec.whatwg.org/multipage/infrastructure.html#dom-radionodelist-value
+    fn SetValue(&self, value: DOMString) {
+        match *self.upcast::<NodeList>().get_list_type() {
+            NodeListType::Simple(ref v) => {
+                for node in v.iter() {
+                    // Step 1
+                    if let Some(input) = node.downcast::<HTMLInputElement>() {
+                        match input.type_() {
+                            atom!("radio") if value == DOMString::from("on") => {
+                                // Step 2
+                                let val = input.Value();
+                                if val.is_empty() || val == DOMString::from("on") {
+                                    input.SetChecked(true);
+                                    return;
+                                }
+                            }
+                            atom!("radio") => {
+                                // Step 2
+                                if input.Value() == value {
+                                    input.SetChecked(true);
+                                    return;
+                                }
+                            }
+                            _ => {}
+                        }
+                    }
+                }
+            }
+            NodeListType::Children(ref cl) => {
+                for node in cl.get_parent_node().traverse_preorder() {
+                    // Step 1
+                    if let Some(input) = node.downcast::<HTMLInputElement>() {
+                        match input.type_() {
+                            atom!("radio") if value == DOMString::from("on") => {
+                                // Step 2
+                                let val = input.Value();
+                                if val.is_empty() || val == DOMString::from("on") {
+                                    input.SetChecked(true);
+                                    return;
+                                }
+                            }
+                            atom!("radio") => {
+                                // Step 2
+                                if input.Value() == value {
+                                    input.SetChecked(true);
+                                    return;
+                                }
+                            }
+                            _ => {}
+                        }
+                    }
+                }
+            }
+        };
+    }
+
+    // FIXME: This shouldn't need to be implemented here since NodeList (the parent of
+    // RadioNodeList) implements IndexedGetter.
+    // https://github.com/servo/servo/issues/5875
+    //
+    // https://dom.spec.whatwg.org/#dom-nodelist-item
+    fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<Root<Node>> {
+        self.node_list.IndexedGetter(index, found)
+    }
+}
diff --git a/components/script/dom/webidls/HTMLFormControlsCollection.webidl b/components/script/dom/webidls/HTMLFormControlsCollection.webidl
index e7f2e84a566..c4a26c7b20c 100644
--- a/components/script/dom/webidls/HTMLFormControlsCollection.webidl
+++ b/components/script/dom/webidls/HTMLFormControlsCollection.webidl
@@ -8,9 +8,3 @@ interface HTMLFormControlsCollection : HTMLCollection {
   // inherits length and item()
   // getter (RadioNodeList or Element)? namedItem(DOMString name); // shadows inherited namedItem()
 };
-
-/*
-interface RadioNodeList : NodeList {
-  attribute DOMString value;
-};
-*/
diff --git a/components/script/dom/webidls/NodeList.webidl b/components/script/dom/webidls/NodeList.webidl
index 9d40e9e19cf..413a7154606 100644
--- a/components/script/dom/webidls/NodeList.webidl
+++ b/components/script/dom/webidls/NodeList.webidl
@@ -9,7 +9,8 @@
 
 interface NodeList {
   [Pure]
-  readonly attribute unsigned long length;
-  [Pure]
   getter Node? item(unsigned long index);
+  [Pure]
+  readonly attribute unsigned long length;
+  // iterable<Node>;
 };
diff --git a/components/script/dom/webidls/RadioNodeList.webidl b/components/script/dom/webidls/RadioNodeList.webidl
new file mode 100644
index 00000000000..d3c1ed892dc
--- /dev/null
+++ b/components/script/dom/webidls/RadioNodeList.webidl
@@ -0,0 +1,9 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * 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/. */
+
+// https://html.spec.whatwg.org/multipage/#radionodelist
+interface RadioNodeList : NodeList {
+    attribute DOMString value;
+};