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Use Cell/RefCell for interior mutability of Node.

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This commit is contained in:
Tetsuharu OHZEKI 2014-05-28 06:02:08 +09:00
parent 1f8eda957d
commit b4463c1fb2
2 changed files with 66 additions and 66 deletions
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118
src/components/script/dom/node.rs
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@ -41,7 +41,7 @@ use libc;
use libc::uintptr_t;
use std::cast::transmute;
use std::cast;
use std::cell::{RefCell, Ref, RefMut};
use std::cell::{Cell, RefCell, Ref, RefMut};
use std::iter::{Map, Filter};
use std::mem;
use style::ComputedValues;
@ -63,25 +63,25 @@ pub struct Node {
pub type_id: NodeTypeId,
/// The parent of this node.
pub parent_node: Option<JS<Node>>,
pub parent_node: Cell<Option<JS<Node>>>,
/// The first child of this node.
pub first_child: Option<JS<Node>>,
pub first_child: Cell<Option<JS<Node>>>,
/// The last child of this node.
pub last_child: Option<JS<Node>>,
pub last_child: Cell<Option<JS<Node>>>,
/// The next sibling of this node.
pub next_sibling: Option<JS<Node>>,
pub next_sibling: Cell<Option<JS<Node>>>,
/// The previous sibling of this node.
pub prev_sibling: Option<JS<Node>>,
pub prev_sibling: Cell<Option<JS<Node>>>,
/// The document that this node belongs to.
owner_doc: Option<JS<Document>>,
owner_doc: Cell<Option<JS<Document>>>,
/// The live list of children return by .childNodes.
pub child_list: Option<JS<NodeList>>,
pub child_list: Cell<Option<JS<NodeList>>>,
/// A bitfield of flags for node items.
flags: NodeFlags,
@ -327,26 +327,26 @@ impl<'a> PrivateNodeHelpers for JSRef<'a, Node> {
///
/// Fails unless `child` is a child of this node. (FIXME: This is not yet checked.)
fn remove_child(&mut self, child: &mut JSRef<Node>) {
assert!(child.parent_node.is_some());
assert!(child.parent_node.get().is_some());
match child.prev_sibling.root() {
match child.prev_sibling.get().root() {
None => {
let next_sibling = child.next_sibling.root();
let next_sibling = child.next_sibling.get().root();
self.set_first_child(next_sibling.root_ref());
}
Some(ref mut prev_sibling) => {
let next_sibling = child.next_sibling.root();
let next_sibling = child.next_sibling.get().root();
prev_sibling.set_next_sibling(next_sibling.root_ref());
}
}
match child.next_sibling.root() {
match child.next_sibling.get().root() {
None => {
let prev_sibling = child.prev_sibling.root();
let prev_sibling = child.prev_sibling.get().root();
self.set_last_child(prev_sibling.root_ref());
}
Some(ref mut next_sibling) => {
let prev_sibling = child.prev_sibling.root();
let prev_sibling = child.prev_sibling.get().root();
next_sibling.set_prev_sibling(prev_sibling.root_ref());
}
}
@ -475,25 +475,25 @@ impl<'a> NodeHelpers for JSRef<'a, Node> {
}
fn parent_node(&self) -> Option<Temporary<Node>> {
self.deref().parent_node.clone().map(|node| Temporary::new(node))
self.deref().parent_node.get().map(|node| Temporary::new(node))
}
fn first_child(&self) -> Option<Temporary<Node>> {
self.deref().first_child.clone().map(|node| Temporary::new(node))
self.deref().first_child.get().map(|node| Temporary::new(node))
}
fn last_child(&self) -> Option<Temporary<Node>> {
self.deref().last_child.clone().map(|node| Temporary::new(node))
self.deref().last_child.get().map(|node| Temporary::new(node))
}
/// Returns the previous sibling of this node. Fails if this node is borrowed mutably.
fn prev_sibling(&self) -> Option<Temporary<Node>> {
self.deref().prev_sibling.clone().map(|node| Temporary::new(node))
self.deref().prev_sibling.get().map(|node| Temporary::new(node))
}
/// Returns the next sibling of this node. Fails if this node is borrowed mutably.
fn next_sibling(&self) -> Option<Temporary<Node>> {
self.deref().next_sibling.clone().map(|node| Temporary::new(node))
self.deref().next_sibling.get().map(|node| Temporary::new(node))
}
#[inline]
@ -593,12 +593,12 @@ impl<'a> NodeHelpers for JSRef<'a, Node> {
fn ancestors(&self) -> AncestorIterator {
AncestorIterator {
current: self.parent_node.clone().map(|node| (*node.root()).clone()),
current: self.parent_node.get().map(|node| (*node.root()).clone()),
}
}
fn owner_doc(&self) -> Temporary<Document> {
Temporary::new(self.owner_doc.get_ref().clone())
Temporary::new(self.owner_doc.get().get_ref().clone())
}
fn set_owner_doc(&mut self, document: &JSRef<Document>) {
@ -607,7 +607,7 @@ impl<'a> NodeHelpers for JSRef<'a, Node> {
fn children(&self) -> AbstractNodeChildrenIterator {
AbstractNodeChildrenIterator {
current_node: self.first_child.clone().map(|node| (*node.root()).clone()),
current_node: self.first_child.get().map(|node| (*node.root()).clone()),
}
}
@ -654,13 +654,13 @@ pub fn from_untrusted_node_address(runtime: *mut JSRuntime, candidate: Untrusted
pub trait LayoutNodeHelpers {
unsafe fn type_id_for_layout(&self) -> NodeTypeId;
unsafe fn parent_node_ref<'a>(&'a self) -> Option<&'a JS<Node>>;
unsafe fn first_child_ref<'a>(&'a self) -> Option<&'a JS<Node>>;
unsafe fn last_child_ref<'a>(&'a self) -> Option<&'a JS<Node>>;
unsafe fn prev_sibling_ref<'a>(&'a self) -> Option<&'a JS<Node>>;
unsafe fn next_sibling_ref<'a>(&'a self) -> Option<&'a JS<Node>>;
unsafe fn parent_node_ref<'a>(&'a self) -> Option<JS<Node>>;
unsafe fn first_child_ref<'a>(&'a self) -> Option<JS<Node>>;
unsafe fn last_child_ref<'a>(&'a self) -> Option<JS<Node>>;
unsafe fn prev_sibling_ref<'a>(&'a self) -> Option<JS<Node>>;
unsafe fn next_sibling_ref<'a>(&'a self) -> Option<JS<Node>>;
unsafe fn owner_doc_for_layout<'a>(&'a self) -> &'a JS<Document>;
unsafe fn owner_doc_for_layout<'a>(&'a self) -> JS<Document>;
unsafe fn is_element_for_layout(&self) -> bool;
}
@ -675,32 +675,32 @@ impl LayoutNodeHelpers for JS<Node> {
}
#[inline]
unsafe fn parent_node_ref<'a>(&'a self) -> Option<&'a JS<Node>> {
(*self.unsafe_get()).parent_node.as_ref()
unsafe fn parent_node_ref<'a>(&'a self) -> Option<JS<Node>> {
(*self.unsafe_get()).parent_node.get()
}
#[inline]
unsafe fn first_child_ref<'a>(&'a self) -> Option<&'a JS<Node>> {
(*self.unsafe_get()).first_child.as_ref()
unsafe fn first_child_ref<'a>(&'a self) -> Option<JS<Node>> {
(*self.unsafe_get()).first_child.get()
}
#[inline]
unsafe fn last_child_ref<'a>(&'a self) -> Option<&'a JS<Node>> {
(*self.unsafe_get()).last_child.as_ref()
unsafe fn last_child_ref<'a>(&'a self) -> Option<JS<Node>> {
(*self.unsafe_get()).last_child.get()
}
#[inline]
unsafe fn prev_sibling_ref<'a>(&'a self) -> Option<&'a JS<Node>> {
(*self.unsafe_get()).prev_sibling.as_ref()
unsafe fn prev_sibling_ref<'a>(&'a self) -> Option<JS<Node>> {
(*self.unsafe_get()).prev_sibling.get()
}
#[inline]
unsafe fn next_sibling_ref<'a>(&'a self) -> Option<&'a JS<Node>> {
(*self.unsafe_get()).next_sibling.as_ref()
unsafe fn next_sibling_ref<'a>(&'a self) -> Option<JS<Node>> {
(*self.unsafe_get()).next_sibling.get()
}
unsafe fn owner_doc_for_layout<'a>(&'a self) -> &'a JS<Document> {
(*self.unsafe_get()).owner_doc.get_ref()
unsafe fn owner_doc_for_layout<'a>(&'a self) -> JS<Document> {
(*self.unsafe_get()).owner_doc.get().unwrap()
}
}
@ -822,7 +822,7 @@ impl<'a> Iterator<JSRef<'a, Node>> for NodeIterator {
self.current_node = match self.current_node.as_ref().map(|node| node.root()) {
None => {
if self.include_start {
Some(self.start_node.clone())
Some(self.start_node)
} else {
self.next_child(&*self.start_node.root())
.map(|child| child.unrooted())
@ -860,7 +860,7 @@ impl<'a> Iterator<JSRef<'a, Node>> for NodeIterator {
}
}
};
self.current_node.clone().map(|node| (*node.root()).clone())
self.current_node.map(|node| (*node.root()).clone())
}
}
@ -911,14 +911,14 @@ impl Node {
eventtarget: EventTarget::new_inherited(NodeTargetTypeId(type_id)),
type_id: type_id,
parent_node: None,
first_child: None,
last_child: None,
next_sibling: None,
prev_sibling: None,
parent_node: Cell::new(None),
first_child: Cell::new(None),
last_child: Cell::new(None),
next_sibling: Cell::new(None),
prev_sibling: Cell::new(None),
owner_doc: doc.unrooted(),
child_list: None,
owner_doc: Cell::new(doc.unrooted()),
child_list: Cell::new(None),
flags: NodeFlags::new(type_id),
@ -1427,12 +1427,12 @@ impl<'a> NodeMethods for JSRef<'a, Node> {
// http://dom.spec.whatwg.org/#dom-node-parentnode
fn GetParentNode(&self) -> Option<Temporary<Node>> {
self.parent_node.clone().map(|node| Temporary::new(node))
self.parent_node.get().map(|node| Temporary::new(node))
}
// http://dom.spec.whatwg.org/#dom-node-parentelement
fn GetParentElement(&self) -> Option<Temporary<Element>> {
self.parent_node.clone()
self.parent_node.get()
.and_then(|parent| {
let parent = parent.root();
ElementCast::to_ref(&*parent).map(|elem| {
@ -1443,12 +1443,12 @@ impl<'a> NodeMethods for JSRef<'a, Node> {
// http://dom.spec.whatwg.org/#dom-node-haschildnodes
fn HasChildNodes(&self) -> bool {
self.first_child.is_some()
self.first_child.get().is_some()
}
// http://dom.spec.whatwg.org/#dom-node-childnodes
fn ChildNodes(&mut self) -> Temporary<NodeList> {
match self.child_list {
match self.child_list.get() {
None => (),
Some(ref list) => return Temporary::new(list.clone()),
}
@ -1457,27 +1457,27 @@ impl<'a> NodeMethods for JSRef<'a, Node> {
let window = doc.deref().window.root();
let child_list = NodeList::new_child_list(&*window, self);
self.child_list.assign(Some(child_list));
Temporary::new(self.child_list.get_ref().clone())
Temporary::new(self.child_list.get().get_ref().clone())
}
// http://dom.spec.whatwg.org/#dom-node-firstchild
fn GetFirstChild(&self) -> Option<Temporary<Node>> {
self.first_child.clone().map(|node| Temporary::new(node))
self.first_child.get().map(|node| Temporary::new(node))
}
// http://dom.spec.whatwg.org/#dom-node-lastchild
fn GetLastChild(&self) -> Option<Temporary<Node>> {
self.last_child.clone().map(|node| Temporary::new(node))
self.last_child.get().map(|node| Temporary::new(node))
}
// http://dom.spec.whatwg.org/#dom-node-previoussibling
fn GetPreviousSibling(&self) -> Option<Temporary<Node>> {
self.prev_sibling.clone().map(|node| Temporary::new(node))
self.prev_sibling.get().map(|node| Temporary::new(node))
}
// http://dom.spec.whatwg.org/#dom-node-nextsibling
fn GetNextSibling(&self) -> Option<Temporary<Node>> {
self.next_sibling.clone().map(|node| Temporary::new(node))
self.next_sibling.get().map(|node| Temporary::new(node))
}
// http://dom.spec.whatwg.org/#dom-node-nodevalue