merge from master

components/script/dom/htmlelement.rs

@@ -4,6 +4,7 @@
 
 use dom::attr::Attr;
 use dom::attr::AttrValue;
+use dom::bindings::codegen::Bindings::ElementBinding::ElementMethods;
 use dom::bindings::codegen::Bindings::EventHandlerBinding::EventHandlerNonNull;
 use dom::bindings::codegen::Bindings::HTMLElementBinding;
 use dom::bindings::codegen::Bindings::HTMLElementBinding::HTMLElementMethods;
@@ -12,21 +13,25 @@ use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
 use dom::bindings::error::{Error, ErrorResult};
 use dom::bindings::inheritance::Castable;
 use dom::bindings::inheritance::{ElementTypeId, HTMLElementTypeId, NodeTypeId};
-use dom::bindings::js::{JS, MutNullableHeap, Root};
+use dom::bindings::js::{JS, MutNullableHeap, Root, RootedReference};
 use dom::bindings::reflector::Reflectable;
 use dom::cssstyledeclaration::{CSSModificationAccess, CSSStyleDeclaration};
 use dom::document::Document;
 use dom::domstringmap::DOMStringMap;
-use dom::element::{AttributeMutation, Element, EventState};
+use dom::element::{AttributeMutation, Element};
 use dom::eventtarget::EventTarget;
 use dom::htmlbodyelement::HTMLBodyElement;
 use dom::htmlframesetelement::HTMLFrameSetElement;
 use dom::htmlhtmlelement::HTMLHtmlElement;
 use dom::htmlinputelement::HTMLInputElement;
+use dom::htmllabelelement::HTMLLabelElement;
 use dom::node::{Node, SEQUENTIALLY_FOCUSABLE};
 use dom::node::{document_from_node, window_from_node};
+use dom::nodelist::NodeList;
 use dom::virtualmethods::VirtualMethods;
 use msg::constellation_msg::FocusType;
+use selectors::states::*;
+use std::ascii::AsciiExt;
 use std::borrow::ToOwned;
 use std::default::Default;
 use std::intrinsics;
@@ -50,10 +55,10 @@ impl PartialEq for HTMLElement {
 impl HTMLElement {
     pub fn new_inherited(tag_name: DOMString, prefix: Option<DOMString>,
                          document: &Document) -> HTMLElement {
-        HTMLElement::new_inherited_with_state(EventState::empty(), tag_name, prefix, document)
+        HTMLElement::new_inherited_with_state(ElementState::empty(), tag_name, prefix, document)
     }
 
-    pub fn new_inherited_with_state(state: EventState, tag_name: DOMString,
+    pub fn new_inherited_with_state(state: ElementState, tag_name: DOMString,
                                     prefix: Option<DOMString>, document: &Document)
                                     -> HTMLElement {
         HTMLElement {
@@ -275,6 +280,45 @@ fn to_snake_case(name: DOMString) -> DOMString {
     attr_name
 }
 
+
+// https://html.spec.whatwg.org/multipage/#attr-data-*
+// if this attribute is in snake case with a data- prefix,
+// this function returns a name converted to camel case
+// without the data prefix.
+
+fn to_camel_case(name: &str) -> Option<DOMString> {
+    if !name.starts_with("data-") {
+        return None;
+    }
+    let name = &name[5..];
+    let has_uppercase = name.chars().any(|curr_char| {
+        curr_char.is_ascii() && curr_char.is_uppercase()
+    });
+    if has_uppercase {
+        return None;
+    }
+    let mut result = "".to_owned();
+    let mut name_chars = name.chars();
+    while let Some(curr_char) = name_chars.next() {
+        //check for hyphen followed by character
+        if curr_char == '\x2d' {
+            if let Some(next_char) = name_chars.next() {
+                if next_char.is_ascii() && next_char.is_lowercase() {
+                    result.push(next_char.to_ascii_uppercase());
+                } else {
+                    result.push(curr_char);
+                    result.push(next_char);
+                }
+            } else {
+                result.push(curr_char);
+            }
+        } else {
+            result.push(curr_char);
+        }
+    }
+    Some(result)
+}
+
 impl HTMLElement {
     pub fn set_custom_attr(&self, name: DOMString, value: DOMString) -> ErrorResult {
         if name.chars()
@@ -316,6 +360,53 @@ impl HTMLElement {
             _ => false,
         }
     }
+
+    pub fn supported_prop_names_custom_attr(&self) -> Vec<DOMString> {
+        let element = self.upcast::<Element>();
+        element.attrs().iter().filter_map(|attr| {
+            let raw_name = attr.local_name();
+            to_camel_case(&raw_name)
+        }).collect()
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-lfe-labels
+    pub fn labels(&self) -> Root<NodeList> {
+        debug_assert!(self.is_labelable_element());
+
+        let element = self.upcast::<Element>();
+        let window = window_from_node(element);
+
+        // Traverse ancestors for implicitly associated <label> elements
+        // https://html.spec.whatwg.org/multipage/#the-label-element:attr-label-for-4
+        let ancestors =
+            self.upcast::<Node>()
+                .ancestors()
+                .filter_map(Root::downcast::<HTMLElement>)
+                // If we reach a labelable element, we have a guarantee no ancestors above it
+                // will be a label for this HTMLElement
+                .take_while(|elem| !elem.is_labelable_element())
+                .filter_map(Root::downcast::<HTMLLabelElement>)
+                .filter(|elem| !elem.upcast::<Element>().has_attribute(&atom!("for")))
+                .filter(|elem| elem.first_labelable_descendant().r() == Some(self))
+                .map(Root::upcast::<Node>);
+
+        let id = element.Id();
+        let id = match &id as &str {
+            "" => return NodeList::new_simple_list(window.r(), ancestors),
+            id => id,
+        };
+
+        // Traverse entire tree for <label> elements with `for` attribute matching `id`
+        let root_element = element.get_root_element();
+        let root_node = root_element.upcast::<Node>();
+        let children = root_node.traverse_preorder()
+                                .filter_map(Root::downcast::<Element>)
+                                .filter(|elem| elem.is::<HTMLLabelElement>())
+                                .filter(|elem| elem.get_string_attribute(&atom!("for")) == id)
+                                .map(Root::upcast::<Node>);
+
+        NodeList::new_simple_list(window.r(), children.chain(ancestors))
+    }
 }
 
 impl VirtualMethods for HTMLElement {