Cargoify servo

components/script/dom/domtokenlist.rs

@@ -0,0 +1,101 @@
+/* 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::attr::Attr;
+use dom::bindings::codegen::Bindings::DOMTokenListBinding;
+use dom::bindings::codegen::Bindings::DOMTokenListBinding::DOMTokenListMethods;
+use dom::bindings::error::{Fallible, InvalidCharacter, Syntax};
+use dom::bindings::global::Window;
+use dom::bindings::js::{JS, JSRef, Temporary, OptionalRootable};
+use dom::bindings::utils::{Reflector, Reflectable, reflect_dom_object};
+use dom::element::{Element, AttributeHandlers};
+use dom::node::window_from_node;
+
+use servo_util::atom::Atom;
+use servo_util::namespace::Null;
+use servo_util::str::{DOMString, HTML_SPACE_CHARACTERS};
+
+#[deriving(Encodable)]
+pub struct DOMTokenList {
+    reflector_: Reflector,
+    element: JS<Element>,
+    local_name: &'static str,
+}
+
+impl DOMTokenList {
+    pub fn new_inherited(element: &JSRef<Element>,
+                         local_name: &'static str) -> DOMTokenList {
+        DOMTokenList {
+            reflector_: Reflector::new(),
+            element: JS::from_rooted(element),
+            local_name: local_name,
+        }
+    }
+
+    pub fn new(element: &JSRef<Element>,
+               local_name: &'static str) -> Temporary<DOMTokenList> {
+        let window = window_from_node(element).root();
+        reflect_dom_object(box DOMTokenList::new_inherited(element, local_name),
+                           &Window(*window), DOMTokenListBinding::Wrap)
+    }
+}
+
+impl Reflectable for DOMTokenList {
+    fn reflector<'a>(&'a self) -> &'a Reflector {
+        &self.reflector_
+    }
+}
+
+trait PrivateDOMTokenListHelpers {
+    fn attribute(&self) -> Option<Temporary<Attr>>;
+    fn check_token_exceptions<'a>(&self, token: &'a str) -> Fallible<&'a str>;
+}
+
+impl<'a> PrivateDOMTokenListHelpers for JSRef<'a, DOMTokenList> {
+    fn attribute(&self) -> Option<Temporary<Attr>> {
+        let element = self.element.root();
+        element.deref().get_attribute(Null, self.local_name)
+    }
+
+    fn check_token_exceptions<'a>(&self, token: &'a str) -> Fallible<&'a str> {
+        match token {
+            "" => Err(Syntax),
+            token if token.find(HTML_SPACE_CHARACTERS).is_some() => Err(InvalidCharacter),
+            token => Ok(token)
+        }
+    }
+}
+
+// http://dom.spec.whatwg.org/#domtokenlist
+impl<'a> DOMTokenListMethods for JSRef<'a, DOMTokenList> {
+    // http://dom.spec.whatwg.org/#dom-domtokenlist-length
+    fn Length(&self) -> u32 {
+        self.attribute().root().map(|attr| {
+            attr.value().tokens().map(|tokens| tokens.len()).unwrap_or(0)
+        }).unwrap_or(0) as u32
+    }
+
+    // http://dom.spec.whatwg.org/#dom-domtokenlist-item
+    fn Item(&self, index: u32) -> Option<DOMString> {
+        self.attribute().root().and_then(|attr| attr.value().tokens().and_then(|mut tokens| {
+            tokens.idx(index as uint).map(|token| token.as_slice().to_string())
+        }))
+    }
+
+    fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<DOMString> {
+        let item = self.Item(index);
+        *found = item.is_some();
+        item
+    }
+
+    // http://dom.spec.whatwg.org/#dom-domtokenlist-contains
+    fn Contains(&self, token: DOMString) -> Fallible<bool> {
+        self.check_token_exceptions(token.as_slice()).map(|slice| {
+            self.attribute().root().and_then(|attr| attr.value().tokens().map(|mut tokens| {
+                let atom = Atom::from_slice(slice);
+                tokens.any(|token| *token == atom)
+            })).unwrap_or(false)
+        })
+    }
+}