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/* 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::AttrBinding;
use dom::bindings::codegen::Bindings::AttrBinding::AttrMethods;
use dom::bindings::codegen::InheritTypes::NodeCast;
use dom::bindings::global::Window;
use dom::bindings::js::{JS, JSRef, Temporary};
use dom::bindings::trace::Traceable;
use dom::bindings::utils::{Reflectable, Reflector, reflect_dom_object};
use dom::element::{Element, AttributeHandlers};
use dom::node::Node;
use dom::window::Window;
use dom::virtualmethods::vtable_for;
use servo_util::atom::Atom;
use servo_util::namespace;
use servo_util::namespace::Namespace;
use servo_util::str::{DOMString, HTML_SPACE_CHARACTERS};
use std::cell::{Ref, Cell, RefCell};
use std::mem;
pub enum AttrSettingType {
FirstSetAttr,
ReplacedAttr,
}
#[deriving(PartialEq, Clone, Encodable)]
pub enum AttrValue {
StringAttrValue(DOMString),
TokenListAttrValue(DOMString, Vec<(uint, uint)>),
UIntAttrValue(DOMString, u32),
}
impl AttrValue {
pub fn from_tokenlist(list: DOMString) -> AttrValue {
let mut indexes = vec![];
let mut last_index: uint = 0;
for (index, ch) in list.as_slice().char_indices() {
if HTML_SPACE_CHARACTERS.iter().any(|&space| space == ch) {
indexes.push((last_index, index));
last_index = index + 1;
}
}
return TokenListAttrValue(list, indexes);
}
pub fn from_u32(string: DOMString, default: u32) -> AttrValue {
let result: u32 = from_str(string.as_slice()).unwrap_or(default);
UIntAttrValue(string, result)
}
pub fn as_slice<'a>(&'a self) -> &'a str {
match *self {
StringAttrValue(ref value) |
TokenListAttrValue(ref value, _) |
UIntAttrValue(ref value, _) => value.as_slice(),
}
}
}
#[deriving(Encodable)]
pub struct Attr {
reflector_: Reflector,
pub local_name: DOMString,
value: Traceable<RefCell<AttrValue>>,
pub name: Atom,
pub namespace: Namespace,
pub prefix: Option<DOMString>,
/// the element that owns this attribute.
owner: Cell<JS<Element>>,
}
impl Reflectable for Attr {
fn reflector<'a>(&'a self) -> &'a Reflector {
&self.reflector_
}
}
impl Attr {
fn new_inherited(local_name: DOMString, value: AttrValue,
name: Atom, namespace: Namespace,
prefix: Option<DOMString>, owner: &JSRef<Element>) -> Attr {
Attr {
reflector_: Reflector::new(),
local_name: local_name,
value: Traceable::new(RefCell::new(value)),
name: name,
namespace: namespace,
prefix: prefix,
owner: Cell::new(JS::from_rooted(owner)),
}
}
pub fn new(window: &JSRef<Window>, local_name: DOMString, value: AttrValue,
name: Atom, namespace: Namespace,
prefix: Option<DOMString>, owner: &JSRef<Element>) -> Temporary<Attr> {
let attr = Attr::new_inherited(local_name, value, name, namespace, prefix, owner);
reflect_dom_object(box attr, &Window(*window), AttrBinding::Wrap)
}
pub fn set_value(&self, set_type: AttrSettingType, value: AttrValue) {
let owner = self.owner.get().root();
let node: &JSRef<Node> = NodeCast::from_ref(&*owner);
let namespace_is_null = self.namespace == namespace::Null;
match set_type {
ReplacedAttr => {
if namespace_is_null {
vtable_for(node).before_remove_attr(self.local_name.clone(), self.value.deref().borrow().as_slice().to_string());
}
}
FirstSetAttr => {}
}
*self.value.deref().borrow_mut() = value;
if namespace_is_null {
vtable_for(node).after_set_attr(self.local_name.clone(), self.value.deref().borrow().as_slice().to_string());
}
}
pub fn value<'a>(&'a self) -> Ref<'a, AttrValue> {
self.value.deref().borrow()
}
}
impl<'a> AttrMethods for JSRef<'a, Attr> {
fn LocalName(&self) -> DOMString {
self.local_name.clone()
}
fn Value(&self) -> DOMString {
self.value.deref().borrow().as_slice().to_string()
}
fn SetValue(&self, value: DOMString) {
let owner = self.owner.get().root();
let value = owner.deref().parse_attribute(
&self.namespace, self.deref().local_name.as_slice(), value);
self.set_value(ReplacedAttr, value);
}
fn Name(&self) -> DOMString {
self.name.as_slice().to_string()
}
fn GetNamespaceURI(&self) -> Option<DOMString> {
match self.namespace.to_str() {
"" => None,
url => Some(url.to_string()),
}
}
fn GetPrefix(&self) -> Option<DOMString> {
self.prefix.clone()
}
}
pub trait AttrHelpersForLayout {
unsafe fn value_ref_forever(&self) -> &'static str;
}
impl AttrHelpersForLayout for Attr {
unsafe fn value_ref_forever(&self) -> &'static str {
// cast to point to T in RefCell<T> directly
let value = mem::transmute::<&RefCell<AttrValue>, &AttrValue>(self.value.deref());
value.as_slice()
}
}
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