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servo/components/script/dom/node.rs
Tetsuharu OHZEKI e2bd9eadd8 LayoutJS<T> implements Layout*Helpers instead of JS<T>.
2015-02-01 01:54:37 +09:00

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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/. */
//! The core DOM types. Defines the basic DOM hierarchy as well as all the HTML elements.
use dom::attr::{Attr, AttrHelpers};
use dom::bindings::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::CharacterDataBinding::CharacterDataMethods;
use dom::bindings::codegen::Bindings::DocumentBinding::DocumentMethods;
use dom::bindings::codegen::Bindings::ElementBinding::ElementMethods;
use dom::bindings::codegen::Bindings::NamedNodeMapBinding::NamedNodeMapMethods;
use dom::bindings::codegen::Bindings::NodeBinding::{NodeConstants, NodeMethods};
use dom::bindings::codegen::Bindings::NodeListBinding::NodeListMethods;
use dom::bindings::codegen::Bindings::ProcessingInstructionBinding::ProcessingInstructionMethods;
use dom::bindings::codegen::InheritTypes::{CommentCast, DocumentCast, DocumentTypeCast};
use dom::bindings::codegen::InheritTypes::{ElementCast, TextCast, NodeCast, ElementDerived};
use dom::bindings::codegen::InheritTypes::{CharacterDataCast, NodeBase, NodeDerived};
use dom::bindings::codegen::InheritTypes::{ProcessingInstructionCast, EventTargetCast};
use dom::bindings::codegen::InheritTypes::{HTMLLegendElementDerived, HTMLFieldSetElementDerived};
use dom::bindings::codegen::InheritTypes::HTMLOptGroupElementDerived;
use dom::bindings::conversions;
use dom::bindings::error::Fallible;
use dom::bindings::error::Error::{NotFound, HierarchyRequest, Syntax};
use dom::bindings::global::GlobalRef;
use dom::bindings::js::{JS, JSRef, LayoutJS, RootedReference, Temporary, Root};
use dom::bindings::js::{TemporaryPushable, OptionalRootedRootable};
use dom::bindings::js::{ResultRootable, OptionalRootable, MutNullableJS};
use dom::bindings::trace::JSTraceable;
use dom::bindings::utils::{Reflectable, reflect_dom_object};
use dom::characterdata::CharacterData;
use dom::comment::Comment;
use dom::document::{Document, DocumentHelpers, IsHTMLDocument, DocumentSource};
use dom::documentfragment::DocumentFragment;
use dom::documenttype::DocumentType;
use dom::element::{AttributeHandlers, Element, ElementCreator, ElementTypeId};
use dom::element::ElementHelpers;
use dom::eventtarget::{EventTarget, EventTargetTypeId};
use dom::htmlelement::HTMLElementTypeId;
use dom::nodelist::NodeList;
use dom::processinginstruction::ProcessingInstruction;
use dom::text::Text;
use dom::virtualmethods::{VirtualMethods, vtable_for};
use dom::window::Window;
use geom::rect::Rect;
use layout_interface::{LayoutChan, Msg};
use devtools_traits::NodeInfo;
use script_traits::UntrustedNodeAddress;
use util::geometry::Au;
use util::str::{DOMString, null_str_as_empty};
use style::selectors::{Selector, AttrSelector, NamespaceConstraint};
use style::selectors::parse_author_origin_selector_list_from_str;
use style::selector_matching::matches;
use style::properties::ComputedValues;
use style;
use js::jsapi::{JSContext, JSObject, JSTracer, JSRuntime};
use js::jsfriendapi;
use core::nonzero::NonZero;
use libc;
use libc::{uintptr_t, c_void};
use std::borrow::ToOwned;
use std::cell::{Cell, RefCell, Ref, RefMut};
use std::default::Default;
use std::iter::{FilterMap, Peekable};
use std::mem;
use std::sync::Arc;
use uuid;
use string_cache::QualName;
//
// The basic Node structure
//
/// An HTML node.
#[dom_struct]
pub struct Node {
/// The JavaScript reflector for this node.
eventtarget: EventTarget,
/// The type of node that this is.
type_id: NodeTypeId,
/// The parent of this node.
parent_node: MutNullableJS<Node>,
/// The first child of this node.
first_child: MutNullableJS<Node>,
/// The last child of this node.
last_child: MutNullableJS<Node>,
/// The next sibling of this node.
next_sibling: MutNullableJS<Node>,
/// The previous sibling of this node.
prev_sibling: MutNullableJS<Node>,
/// The document that this node belongs to.
owner_doc: MutNullableJS<Document>,
/// The live list of children return by .childNodes.
child_list: MutNullableJS<NodeList>,
/// A bitfield of flags for node items.
flags: Cell<NodeFlags>,
/// Layout information. Only the layout task may touch this data.
///
/// Must be sent back to the layout task to be destroyed when this
/// node is finalized.
layout_data: LayoutDataRef,
unique_id: DOMRefCell<String>,
}
impl NodeDerived for EventTarget {
fn is_node(&self) -> bool {
match *self.type_id() {
EventTargetTypeId::Node(_) => true,
_ => false
}
}
}
bitflags! {
#[doc = "Flags for node items."]
#[jstraceable]
flags NodeFlags: u16 {
#[doc = "Specifies whether this node is in a document."]
const IS_IN_DOC = 0x01,
#[doc = "Specifies whether this node is in hover state."]
const IN_HOVER_STATE = 0x02,
#[doc = "Specifies whether this node is in disabled state."]
const IN_DISABLED_STATE = 0x04,
#[doc = "Specifies whether this node is in enabled state."]
const IN_ENABLED_STATE = 0x08,
#[doc = "Specifies whether this node _must_ be reflowed regardless of style differences."]
const HAS_CHANGED = 0x10,
#[doc = "Specifies whether this node needs style recalc on next reflow."]
const IS_DIRTY = 0x20,
#[doc = "Specifies whether this node has siblings (inclusive of itself) which \
changed since the last reflow."]
const HAS_DIRTY_SIBLINGS = 0x40,
#[doc = "Specifies whether this node has descendants (inclusive of itself) which \
have changed since the last reflow."]
const HAS_DIRTY_DESCENDANTS = 0x80,
// TODO: find a better place to keep this (#4105)
// https://critic.hoppipolla.co.uk/showcomment?chain=8873
// Perhaps using a Set in Document?
#[doc = "Specifies whether or not there is an authentic click in progress on \
this element."]
const CLICK_IN_PROGRESS = 0x100,
}
}
impl NodeFlags {
pub fn new(type_id: NodeTypeId) -> NodeFlags {
let dirty = HAS_CHANGED | IS_DIRTY | HAS_DIRTY_SIBLINGS | HAS_DIRTY_DESCENDANTS;
match type_id {
NodeTypeId::Document => IS_IN_DOC | dirty,
// The following elements are enabled by default.
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLButtonElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLInputElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLSelectElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTextAreaElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLOptGroupElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLOptionElement)) |
//NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLMenuItemElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLFieldSetElement)) => IN_ENABLED_STATE | dirty,
_ => dirty,
}
}
}
#[unsafe_destructor]
impl Drop for Node {
#[allow(unsafe_blocks)]
fn drop(&mut self) {
unsafe {
self.reap_layout_data();
}
}
}
/// suppress observers flag
/// http://dom.spec.whatwg.org/#concept-node-insert
/// http://dom.spec.whatwg.org/#concept-node-remove
#[derive(Copy)]
enum SuppressObserver {
Suppressed,
Unsuppressed
}
/// Layout data that is shared between the script and layout tasks.
pub struct SharedLayoutData {
/// The results of CSS styling for this node.
pub style: Option<Arc<ComputedValues>>,
}
/// Encapsulates the abstract layout data.
pub struct LayoutData {
chan: Option<LayoutChan>,
_shared_data: SharedLayoutData,
_data: NonZero<*const ()>,
}
pub struct LayoutDataRef {
pub data_cell: RefCell<Option<LayoutData>>,
}
no_jsmanaged_fields!(LayoutDataRef);
impl LayoutDataRef {
pub fn new() -> LayoutDataRef {
LayoutDataRef {
data_cell: RefCell::new(None),
}
}
/// Returns true if there is layout data present.
#[inline]
pub fn is_present(&self) -> bool {
self.data_cell.borrow().is_some()
}
/// Take the chan out of the layout data if it is present.
pub fn take_chan(&self) -> Option<LayoutChan> {
let mut layout_data = self.data_cell.borrow_mut();
match &mut *layout_data {
&mut None => None,
&mut Some(ref mut layout_data) => Some(layout_data.chan.take().unwrap()),
}
}
/// Borrows the layout data immutably, *asserting that there are no mutators*. Bad things will
/// happen if you try to mutate the layout data while this is held. This is the only thread-
/// safe layout data accessor.
#[inline]
pub unsafe fn borrow_unchecked(&self) -> *const Option<LayoutData> {
mem::transmute(&self.data_cell)
}
/// Borrows the layout data immutably. This function is *not* thread-safe.
#[inline]
pub fn borrow<'a>(&'a self) -> Ref<'a,Option<LayoutData>> {
self.data_cell.borrow()
}
/// Borrows the layout data mutably. This function is *not* thread-safe.
///
/// FIXME(pcwalton): We should really put this behind a `MutLayoutView` phantom type, to
/// prevent CSS selector matching from mutably accessing nodes it's not supposed to and racing
/// on it. This has already resulted in one bug!
#[inline]
pub fn borrow_mut<'a>(&'a self) -> RefMut<'a,Option<LayoutData>> {
self.data_cell.borrow_mut()
}
}
unsafe impl Send for LayoutDataRef {}
/// The different types of nodes.
#[derive(Copy, PartialEq, Show)]
#[jstraceable]
pub enum NodeTypeId {
DocumentType,
DocumentFragment,
Comment,
Document,
Element(ElementTypeId),
Text,
ProcessingInstruction,
}
trait PrivateNodeHelpers {
fn node_inserted(self);
fn node_removed(self, parent_in_doc: bool);
fn add_child(self, new_child: JSRef<Node>, before: Option<JSRef<Node>>);
fn remove_child(self, child: JSRef<Node>);
}
impl<'a> PrivateNodeHelpers for JSRef<'a, Node> {
// http://dom.spec.whatwg.org/#node-is-inserted
fn node_inserted(self) {
assert!(self.parent_node().is_some());
let document = document_from_node(self).root();
let is_in_doc = self.is_in_doc();
for node in self.traverse_preorder() {
vtable_for(&node).bind_to_tree(is_in_doc);
}
let parent = self.parent_node().root();
parent.map(|parent| vtable_for(&parent.r()).child_inserted(self));
document.r().content_and_heritage_changed(self, NodeDamage::OtherNodeDamage);
}
// http://dom.spec.whatwg.org/#node-is-removed
fn node_removed(self, parent_in_doc: bool) {
assert!(self.parent_node().is_none());
for node in self.traverse_preorder() {
vtable_for(&node).unbind_from_tree(parent_in_doc);
}
}
//
// Pointer stitching
//
/// Adds a new child to the end of this node's list of children.
///
/// Fails unless `new_child` is disconnected from the tree.
fn add_child(self, new_child: JSRef<Node>, before: Option<JSRef<Node>>) {
assert!(new_child.parent_node().is_none());
assert!(new_child.prev_sibling().is_none());
assert!(new_child.next_sibling().is_none());
match before {
Some(ref before) => {
assert!(before.parent_node().root().r() == Some(self));
match before.prev_sibling().root() {
None => {
assert!(Some(*before) == self.first_child().root().r());
self.first_child.assign(Some(new_child));
},
Some(prev_sibling) => {
prev_sibling.r().next_sibling.assign(Some(new_child));
new_child.prev_sibling.assign(Some(prev_sibling.r()));
},
}
before.prev_sibling.assign(Some(new_child));
new_child.next_sibling.assign(Some(*before));
},
None => {
match self.last_child().root() {
None => self.first_child.assign(Some(new_child)),
Some(last_child) => {
assert!(last_child.r().next_sibling().is_none());
last_child.r().next_sibling.assign(Some(new_child));
new_child.prev_sibling.assign(Some(last_child.r()));
}
}
self.last_child.assign(Some(new_child));
},
}
new_child.parent_node.assign(Some(self));
}
/// Removes the given child from this node's list of children.
///
/// Fails unless `child` is a child of this node.
fn remove_child(self, child: JSRef<Node>) {
assert!(child.parent_node().root().r() == Some(self));
match child.prev_sibling.get().root() {
None => {
self.first_child.assign(child.next_sibling.get());
}
Some(prev_sibling) => {
prev_sibling.r().next_sibling.assign(child.next_sibling.get());
}
}
match child.next_sibling.get().root() {
None => {
self.last_child.assign(child.prev_sibling.get());
}
Some(next_sibling) => {
next_sibling.r().prev_sibling.assign(child.prev_sibling.get());
}
}
child.prev_sibling.clear();
child.next_sibling.clear();
child.parent_node.clear();
}
}
pub struct QuerySelectorIterator<'a> {
selectors: Vec<Selector>,
iterator: TreeIterator<'a>,
}
impl<'a> QuerySelectorIterator<'a> {
unsafe fn new(iter: TreeIterator<'a>, selectors: Vec<Selector>) -> QuerySelectorIterator<'a> {
QuerySelectorIterator {
selectors: selectors,
iterator: iter,
}
}
}
impl<'a> Iterator for QuerySelectorIterator<'a> {
type Item = JSRef<'a, Node>;
fn next(&mut self) -> Option<JSRef<'a, Node>> {
let selectors = &self.selectors;
// TODO(cgaebel): Is it worth it to build a bloom filter here
// (instead of passing `None`)? Probably.
self.iterator.find(|node| node.is_element() && matches(selectors, node, &mut None))
}
}
pub trait NodeHelpers<'a> {
fn ancestors(self) -> AncestorIterator<'a>;
fn inclusive_ancestors(self) -> AncestorIterator<'a>;
fn children(self) -> NodeChildrenIterator<'a>;
fn rev_children(self) -> ReverseChildrenIterator;
fn child_elements(self) -> ChildElementIterator<'a>;
fn following_siblings(self) -> NodeChildrenIterator<'a>;
fn is_in_doc(self) -> bool;
fn is_inclusive_ancestor_of(self, parent: JSRef<'a, Node>) -> bool; // FIXME: See #3960
fn is_parent_of(self, child: JSRef<Node>) -> bool;
fn type_id(self) -> NodeTypeId;
fn parent_node(self) -> Option<Temporary<Node>>;
fn first_child(self) -> Option<Temporary<Node>>;
fn last_child(self) -> Option<Temporary<Node>>;
fn prev_sibling(self) -> Option<Temporary<Node>>;
fn next_sibling(self) -> Option<Temporary<Node>>;
fn owner_doc(self) -> Temporary<Document>;
fn set_owner_doc(self, document: JSRef<Document>);
fn is_in_html_doc(self) -> bool;
fn is_element(self) -> bool;
fn is_document(self) -> bool;
fn is_doctype(self) -> bool;
fn is_text(self) -> bool;
fn is_anchor_element(self) -> bool;
fn get_flag(self, flag: NodeFlags) -> bool;
fn set_flag(self, flag: NodeFlags, value: bool);
fn get_hover_state(self) -> bool;
fn set_hover_state(self, state: bool);
fn get_disabled_state(self) -> bool;
fn set_disabled_state(self, state: bool);
fn get_enabled_state(self) -> bool;
fn set_enabled_state(self, state: bool);
fn get_has_changed(self) -> bool;
fn set_has_changed(self, state: bool);
fn get_is_dirty(self) -> bool;
fn set_is_dirty(self, state: bool);
fn get_has_dirty_siblings(self) -> bool;
fn set_has_dirty_siblings(self, state: bool);
fn get_has_dirty_descendants(self) -> bool;
fn set_has_dirty_descendants(self, state: bool);
/// Marks the given node as `IS_DIRTY`, its siblings as `HAS_DIRTY_SIBLINGS` (to deal with
/// sibling selectors), its ancestors as `HAS_DIRTY_DESCENDANTS`, and its descendants as
/// `IS_DIRTY`. If anything more than the node's style was damaged, this method also sets the
/// `HAS_CHANGED` flag.
fn dirty(self, damage: NodeDamage);
/// Similar to `dirty`, but will always walk the ancestors to mark them dirty,
/// too. This is useful when a node is reparented. The node will frequently
/// already be marked as `changed` to skip double-dirties, but the ancestors
/// still need to be marked as `HAS_DIRTY_DESCENDANTS`.
///
/// See #4170
fn force_dirty_ancestors(self, damage: NodeDamage);
fn dirty_impl(self, damage: NodeDamage, force_ancestors: bool);
fn dump(self);
fn dump_indent(self, indent: uint);
fn debug_str(self) -> String;
fn traverse_preorder(self) -> TreeIterator<'a>;
fn inclusively_following_siblings(self) -> NodeChildrenIterator<'a>;
fn to_trusted_node_address(self) -> TrustedNodeAddress;
fn get_bounding_content_box(self) -> Rect<Au>;
fn get_content_boxes(self) -> Vec<Rect<Au>>;
fn query_selector(self, selectors: DOMString) -> Fallible<Option<Temporary<Element>>>;
unsafe fn query_selector_iter(self, selectors: DOMString) -> Fallible<QuerySelectorIterator<'a>>;
fn query_selector_all(self, selectors: DOMString) -> Fallible<Temporary<NodeList>>;
fn remove_self(self);
fn get_unique_id(self) -> String;
fn summarize(self) -> NodeInfo;
}
impl<'a> NodeHelpers<'a> for JSRef<'a, Node> {
/// Dumps the subtree rooted at this node, for debugging.
fn dump(self) {
self.dump_indent(0);
}
/// Dumps the node tree, for debugging, with indentation.
fn dump_indent(self, indent: uint) {
let mut s = String::new();
for _ in range(0, indent) {
s.push_str(" ");
}
s.push_str(self.debug_str().as_slice());
debug!("{:?}", s);
// FIXME: this should have a pure version?
for kid in self.children() {
kid.dump_indent(indent + 1u)
}
}
/// Returns a string that describes this node.
fn debug_str(self) -> String {
format!("{:?}", self.type_id)
}
fn is_in_doc(self) -> bool {
self.flags.get().contains(IS_IN_DOC)
}
/// Returns the type ID of this node. Fails if this node is borrowed mutably.
fn type_id(self) -> NodeTypeId {
self.type_id
}
fn parent_node(self) -> Option<Temporary<Node>> {
self.parent_node.get()
}
fn first_child(self) -> Option<Temporary<Node>> {
self.first_child.get()
}
fn last_child(self) -> Option<Temporary<Node>> {
self.last_child.get()
}
/// Returns the previous sibling of this node. Fails if this node is borrowed mutably.
fn prev_sibling(self) -> Option<Temporary<Node>> {
self.prev_sibling.get()
}
/// Returns the next sibling of this node. Fails if this node is borrowed mutably.
fn next_sibling(self) -> Option<Temporary<Node>> {
self.next_sibling.get()
}
#[inline]
fn is_element(self) -> bool {
match self.type_id {
NodeTypeId::Element(..) => true,
_ => false
}
}
#[inline]
fn is_document(self) -> bool {
self.type_id == NodeTypeId::Document
}
#[inline]
fn is_anchor_element(self) -> bool {
self.type_id == NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAnchorElement))
}
#[inline]
fn is_doctype(self) -> bool {
self.type_id == NodeTypeId::DocumentType
}
#[inline]
fn is_text(self) -> bool {
self.type_id == NodeTypeId::Text
}
fn get_flag(self, flag: NodeFlags) -> bool {
self.flags.get().contains(flag)
}
fn set_flag(self, flag: NodeFlags, value: bool) {
let mut flags = self.flags.get();
if value {
flags.insert(flag);
} else {
flags.remove(flag);
}
self.flags.set(flags);
}
fn get_hover_state(self) -> bool {
self.get_flag(IN_HOVER_STATE)
}
fn set_hover_state(self, state: bool) {
self.set_flag(IN_HOVER_STATE, state)
}
fn get_disabled_state(self) -> bool {
self.get_flag(IN_DISABLED_STATE)
}
fn set_disabled_state(self, state: bool) {
self.set_flag(IN_DISABLED_STATE, state)
}
fn get_enabled_state(self) -> bool {
self.get_flag(IN_ENABLED_STATE)
}
fn set_enabled_state(self, state: bool) {
self.set_flag(IN_ENABLED_STATE, state)
}
fn get_has_changed(self) -> bool {
self.get_flag(HAS_CHANGED)
}
fn set_has_changed(self, state: bool) {
self.set_flag(HAS_CHANGED, state)
}
fn get_is_dirty(self) -> bool {
self.get_flag(IS_DIRTY)
}
fn set_is_dirty(self, state: bool) {
self.set_flag(IS_DIRTY, state)
}
fn get_has_dirty_siblings(self) -> bool {
self.get_flag(HAS_DIRTY_SIBLINGS)
}
fn set_has_dirty_siblings(self, state: bool) {
self.set_flag(HAS_DIRTY_SIBLINGS, state)
}
fn get_has_dirty_descendants(self) -> bool {
self.get_flag(HAS_DIRTY_DESCENDANTS)
}
fn set_has_dirty_descendants(self, state: bool) {
self.set_flag(HAS_DIRTY_DESCENDANTS, state)
}
fn force_dirty_ancestors(self, damage: NodeDamage) {
self.dirty_impl(damage, true)
}
fn dirty(self, damage: NodeDamage) {
self.dirty_impl(damage, false)
}
fn dirty_impl(self, damage: NodeDamage, force_ancestors: bool) {
// 1. Dirty self.
match damage {
NodeDamage::NodeStyleDamaged => {}
NodeDamage::OtherNodeDamage => self.set_has_changed(true),
}
if self.get_is_dirty() && !force_ancestors {
return
}
// 2. Dirty descendants.
fn dirty_subtree(node: JSRef<Node>) {
// Stop if this subtree is already dirty.
if node.get_is_dirty() { return }
node.set_flag(IS_DIRTY | HAS_DIRTY_SIBLINGS | HAS_DIRTY_DESCENDANTS, true);
for kid in node.children() {
dirty_subtree(kid);
}
}
dirty_subtree(self);
// 3. Dirty siblings.
//
// TODO(cgaebel): This is a very conservative way to account for sibling
// selectors. Maybe we can do something smarter in the future.
let parent =
match self.parent_node() {
None => return,
Some(parent) => parent,
};
for sibling in parent.root().r().children() {
sibling.set_has_dirty_siblings(true);
}
// 4. Dirty ancestors.
for ancestor in self.ancestors() {
if !force_ancestors && ancestor.get_has_dirty_descendants() { break }
ancestor.set_has_dirty_descendants(true);
}
}
/// Iterates over this node and all its descendants, in preorder.
fn traverse_preorder(self) -> TreeIterator<'a> {
TreeIterator::new(self)
}
fn inclusively_following_siblings(self) -> NodeChildrenIterator<'a> {
NodeChildrenIterator {
current: Some(self.clone()),
}
}
fn is_inclusive_ancestor_of(self, parent: JSRef<'a, Node>) -> bool {
self == parent || parent.ancestors().any(|ancestor| ancestor == self)
}
fn following_siblings(self) -> NodeChildrenIterator<'a> {
NodeChildrenIterator {
current: self.next_sibling().root().map(|next| next.clone()),
}
}
fn is_parent_of(self, child: JSRef<Node>) -> bool {
match child.parent_node() {
Some(ref parent) if parent == &Temporary::from_rooted(self) => true,
_ => false
}
}
fn to_trusted_node_address(self) -> TrustedNodeAddress {
TrustedNodeAddress(&*self as *const Node as *const libc::c_void)
}
fn get_bounding_content_box(self) -> Rect<Au> {
window_from_node(self).root().r().page().content_box_query(self.to_trusted_node_address())
}
fn get_content_boxes(self) -> Vec<Rect<Au>> {
window_from_node(self).root().r().page().content_boxes_query(self.to_trusted_node_address())
}
// http://dom.spec.whatwg.org/#dom-parentnode-queryselector
fn query_selector(self, selectors: DOMString) -> Fallible<Option<Temporary<Element>>> {
// Step 1.
match parse_author_origin_selector_list_from_str(selectors.as_slice()) {
// Step 2.
Err(()) => return Err(Syntax),
// Step 3.
Ok(ref selectors) => {
let root = self.ancestors().last().unwrap_or(self.clone());
Ok(root.traverse_preorder()
.filter_map(ElementCast::to_ref)
.find(|element| matches(selectors, &NodeCast::from_ref(*element), &mut None))
.map(Temporary::from_rooted))
}
}
}
/// Get an iterator over all nodes which match a set of selectors
/// Be careful not to do anything which may manipulate the DOM tree whilst iterating, otherwise
/// the iterator may be invalidated
unsafe fn query_selector_iter(self, selectors: DOMString)
-> Fallible<QuerySelectorIterator<'a>> {
// Step 1.
let nodes;
let root = self.ancestors().last().unwrap_or(self.clone());
match parse_author_origin_selector_list_from_str(selectors.as_slice()) {
// Step 2.
Err(()) => return Err(Syntax),
// Step 3.
Ok(selectors) => {
nodes = QuerySelectorIterator::new(root.traverse_preorder(), selectors);
}
};
Ok(nodes)
}
// http://dom.spec.whatwg.org/#dom-parentnode-queryselectorall
#[allow(unsafe_blocks)]
fn query_selector_all(self, selectors: DOMString) -> Fallible<Temporary<NodeList>> {
// Step 1.
unsafe {
self.query_selector_iter(selectors).map(|iter| {
let window = window_from_node(self).root();
NodeList::new_simple_list(window.r(), iter.collect())
})
}
}
fn ancestors(self) -> AncestorIterator<'a> {
AncestorIterator {
current: self.parent_node.get().map(|node| (*node.root()).clone()),
}
}
fn inclusive_ancestors(self) -> AncestorIterator<'a> {
AncestorIterator {
current: Some(self.clone())
}
}
fn owner_doc(self) -> Temporary<Document> {
self.owner_doc.get().unwrap()
}
fn set_owner_doc(self, document: JSRef<Document>) {
self.owner_doc.assign(Some(document.clone()));
}
fn is_in_html_doc(self) -> bool {
self.owner_doc().root().r().is_html_document()
}
fn children(self) -> NodeChildrenIterator<'a> {
NodeChildrenIterator {
current: self.first_child.get().map(|node| (*node.root()).clone()),
}
}
fn rev_children(self) -> ReverseChildrenIterator {
ReverseChildrenIterator {
current: self.last_child.get().root(),
}
}
fn child_elements(self) -> ChildElementIterator<'a> {
fn cast(n: JSRef<Node>) -> Option<JSRef<Element>> {
ElementCast::to_ref(n)
}
self.children()
.filter_map(cast as fn(JSRef<Node>) -> Option<JSRef<Element>>)
.peekable()
}
fn remove_self(self) {
match self.parent_node().root() {
Some(parent) => parent.r().remove_child(self),
None => ()
}
}
fn get_unique_id(self) -> String {
self.unique_id.borrow().clone()
}
fn summarize(self) -> NodeInfo {
if self.unique_id.borrow().is_empty() {
let mut unique_id = self.unique_id.borrow_mut();
*unique_id = uuid::Uuid::new_v4().to_simple_string();
}
NodeInfo {
uniqueId: self.unique_id.borrow().clone(),
baseURI: self.GetBaseURI().unwrap_or("".to_owned()),
parent: self.GetParentNode().root().map(|node| node.r().get_unique_id()).unwrap_or("".to_owned()),
nodeType: self.NodeType() as uint,
namespaceURI: "".to_owned(), //FIXME
nodeName: self.NodeName(),
numChildren: self.ChildNodes().root().r().Length() as uint,
//FIXME doctype nodes only
name: "".to_owned(),
publicId: "".to_owned(),
systemId: "".to_owned(),
attrs: {
let e: Option<JSRef<Element>> = ElementCast::to_ref(self);
match e {
Some(element) => element.summarize(),
None => vec!(),
}
},
isDocumentElement:
self.owner_doc().root()
.r()
.GetDocumentElement()
.map(|elem| NodeCast::from_ref(elem.root().r()) == self)
.unwrap_or(false),
shortValue: self.GetNodeValue().unwrap_or("".to_owned()), //FIXME: truncate
incompleteValue: false, //FIXME: reflect truncation
}
}
}
/// If the given untrusted node address represents a valid DOM node in the given runtime,
/// returns it.
#[allow(unsafe_blocks)]
pub fn from_untrusted_node_address(runtime: *mut JSRuntime, candidate: UntrustedNodeAddress)
-> Temporary<Node> {
unsafe {
let candidate: uintptr_t = mem::transmute(candidate.0);
let object: *mut JSObject = jsfriendapi::bindgen::JS_GetAddressableObject(runtime,
candidate);
if object.is_null() {
panic!("Attempted to create a `JS<Node>` from an invalid pointer!")
}
let boxed_node: *const Node = conversions::unwrap(object);
Temporary::new(JS::from_raw(boxed_node))
}
}
pub trait LayoutNodeHelpers {
unsafe fn type_id_for_layout(&self) -> NodeTypeId;
unsafe fn parent_node_ref(&self) -> Option<LayoutJS<Node>>;
unsafe fn first_child_ref(&self) -> Option<LayoutJS<Node>>;
unsafe fn last_child_ref(&self) -> Option<LayoutJS<Node>>;
unsafe fn prev_sibling_ref(&self) -> Option<LayoutJS<Node>>;
unsafe fn next_sibling_ref(&self) -> Option<LayoutJS<Node>>;
unsafe fn owner_doc_for_layout(&self) -> LayoutJS<Document>;
unsafe fn is_element_for_layout(&self) -> bool;
unsafe fn get_flag(self, flag: NodeFlags) -> bool;
unsafe fn set_flag(self, flag: NodeFlags, value: bool);
}
impl LayoutNodeHelpers for LayoutJS<Node> {
#[inline]
unsafe fn type_id_for_layout(&self) -> NodeTypeId {
(*self.unsafe_get()).type_id
}
#[inline]
unsafe fn is_element_for_layout(&self) -> bool {
(*self.unsafe_get()).is_element()
}
#[inline]
unsafe fn parent_node_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).parent_node.get_inner_as_layout()
}
#[inline]
unsafe fn first_child_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).first_child.get_inner_as_layout()
}
#[inline]
unsafe fn last_child_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).last_child.get_inner_as_layout()
}
#[inline]
unsafe fn prev_sibling_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).prev_sibling.get_inner_as_layout()
}
#[inline]
unsafe fn next_sibling_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).next_sibling.get_inner_as_layout()
}
#[inline]
unsafe fn owner_doc_for_layout(&self) -> LayoutJS<Document> {
(*self.unsafe_get()).owner_doc.get_inner_as_layout().unwrap()
}
#[inline]
unsafe fn get_flag(self, flag: NodeFlags) -> bool {
(*self.unsafe_get()).flags.get().contains(flag)
}
#[inline]
unsafe fn set_flag(self, flag: NodeFlags, value: bool) {
let this = self.unsafe_get();
let mut flags = (*this).flags.get();
if value {
flags.insert(flag);
} else {
flags.remove(flag);
}
(*this).flags.set(flags);
}
}
pub trait RawLayoutNodeHelpers {
unsafe fn get_hover_state_for_layout(&self) -> bool;
unsafe fn get_disabled_state_for_layout(&self) -> bool;
unsafe fn get_enabled_state_for_layout(&self) -> bool;
fn type_id_for_layout(&self) -> NodeTypeId;
}
impl RawLayoutNodeHelpers for Node {
#[inline]
unsafe fn get_hover_state_for_layout(&self) -> bool {
self.flags.get().contains(IN_HOVER_STATE)
}
#[inline]
unsafe fn get_disabled_state_for_layout(&self) -> bool {
self.flags.get().contains(IN_DISABLED_STATE)
}
#[inline]
unsafe fn get_enabled_state_for_layout(&self) -> bool {
self.flags.get().contains(IN_ENABLED_STATE)
}
#[inline]
fn type_id_for_layout(&self) -> NodeTypeId {
self.type_id
}
}
//
// Iteration and traversal
//
pub type ChildElementIterator<'a> =
Peekable<JSRef<'a, Element>,
FilterMap<JSRef<'a, Node>,
JSRef<'a, Element>,
NodeChildrenIterator<'a>,
fn(JSRef<Node>) -> Option<JSRef<Element>>>>;
pub struct NodeChildrenIterator<'a> {
current: Option<JSRef<'a, Node>>,
}
impl<'a> Iterator for NodeChildrenIterator<'a> {
type Item = JSRef<'a, Node>;
fn next(&mut self) -> Option<JSRef<'a, Node>> {
let node = self.current;
self.current = node.and_then(|node| node.next_sibling().map(|node| *node.root()));
node
}
}
pub struct ReverseChildrenIterator {
current: Option<Root<Node>>,
}
impl Iterator for ReverseChildrenIterator {
type Item = Temporary<Node>;
fn next(&mut self) -> Option<Temporary<Node>> {
let node = self.current.r().map(Temporary::from_rooted);
self.current = self.current.take().and_then(|node| node.r().prev_sibling()).root();
node
}
}
pub struct AncestorIterator<'a> {
current: Option<JSRef<'a, Node>>,
}
impl<'a> Iterator for AncestorIterator<'a> {
type Item = JSRef<'a, Node>;
fn next(&mut self) -> Option<JSRef<'a, Node>> {
let node = self.current;
self.current = node.and_then(|node| node.parent_node().map(|node| *node.root()));
node
}
}
pub struct TreeIterator<'a> {
stack: Vec<JSRef<'a, Node>>,
}
impl<'a> TreeIterator<'a> {
fn new(root: JSRef<'a, Node>) -> TreeIterator<'a> {
let mut stack = vec!();
stack.push(root);
TreeIterator {
stack: stack,
}
}
}
impl<'a> Iterator for TreeIterator<'a> {
type Item = JSRef<'a, Node>;
fn next(&mut self) -> Option<JSRef<'a, Node>> {
let ret = self.stack.pop();
ret.map(|node| {
self.stack.extend(node.rev_children().map(|c| *c.root()))
});
ret
}
}
#[must_root]
pub struct NodeIterator {
pub start_node: JS<Node>,
pub current_node: Option<JS<Node>>,
pub depth: uint,
include_start: bool,
include_descendants_of_void: bool
}
impl NodeIterator {
pub fn new<'a>(start_node: JSRef<'a, Node>,
include_start: bool,
include_descendants_of_void: bool) -> NodeIterator {
NodeIterator {
start_node: JS::from_rooted(start_node),
current_node: None,
depth: 0,
include_start: include_start,
include_descendants_of_void: include_descendants_of_void
}
}
fn next_child<'b>(&self, node: JSRef<'b, Node>) -> Option<JSRef<'b, Node>> {
let skip = |&:element: JSRef<Element>| {
!self.include_descendants_of_void && element.is_void()
};
match ElementCast::to_ref(node) {
Some(element) if skip(element) => None,
_ => node.first_child().map(|child| (*child.root()).clone()),
}
}
}
impl<'a> Iterator for NodeIterator {
type Item = JSRef<'a, Node>;
fn next(&mut self) -> Option<JSRef<'a, Node>> {
self.current_node = match self.current_node.as_ref().map(|node| node.root()) {
None => {
if self.include_start {
Some(self.start_node)
} else {
self.next_child(*self.start_node.root())
.map(|child| JS::from_rooted(child))
}
},
Some(node) => {
match self.next_child(*node) {
Some(child) => {
self.depth += 1;
Some(JS::from_rooted(child))
},
None if JS::from_rooted(*node) == self.start_node => None,
None => {
match node.next_sibling().root() {
Some(sibling) => Some(JS::from_rooted(*sibling)),
None => {
let mut candidate = node.clone();
while candidate.next_sibling().is_none() {
candidate = (*candidate.parent_node()
.expect("Got to root without reaching start node")
.root()).clone();
self.depth -= 1;
if JS::from_rooted(candidate) == self.start_node {
break;
}
}
if JS::from_rooted(candidate) != self.start_node {
candidate.next_sibling().map(|node| JS::from_rooted(*node.root()))
} else {
None
}
}
}
}
}
}
};
self.current_node.map(|node| (*node.root()).clone())
}
}
/// Specifies whether children must be recursively cloned or not.
#[derive(Copy, PartialEq)]
pub enum CloneChildrenFlag {
CloneChildren,
DoNotCloneChildren
}
fn as_uintptr<T>(t: &T) -> uintptr_t { t as *const T as uintptr_t }
impl Node {
pub fn reflect_node<N: Reflectable+NodeBase>
(node: Box<N>,
document: JSRef<Document>,
wrap_fn: extern "Rust" fn(*mut JSContext, GlobalRef, Box<N>) -> Temporary<N>)
-> Temporary<N> {
let window = document.window().root();
reflect_dom_object(node, GlobalRef::Window(window.r()), wrap_fn)
}
pub fn new_inherited(type_id: NodeTypeId, doc: JSRef<Document>) -> Node {
Node::new_(type_id, Some(doc.clone()))
}
pub fn new_without_doc(type_id: NodeTypeId) -> Node {
Node::new_(type_id, None)
}
fn new_(type_id: NodeTypeId, doc: Option<JSRef<Document>>) -> Node {
Node {
eventtarget: EventTarget::new_inherited(EventTargetTypeId::Node(type_id)),
type_id: type_id,
parent_node: Default::default(),
first_child: Default::default(),
last_child: Default::default(),
next_sibling: Default::default(),
prev_sibling: Default::default(),
owner_doc: MutNullableJS::new(doc),
child_list: Default::default(),
flags: Cell::new(NodeFlags::new(type_id)),
layout_data: LayoutDataRef::new(),
unique_id: DOMRefCell::new(String::new()),
}
}
#[inline]
pub fn layout_data(&self) -> Ref<Option<LayoutData>> {
self.layout_data.borrow()
}
#[inline]
pub fn layout_data_mut(&self) -> RefMut<Option<LayoutData>> {
self.layout_data.borrow_mut()
}
#[inline]
pub unsafe fn layout_data_unchecked(&self) -> *const Option<LayoutData> {
self.layout_data.borrow_unchecked()
}
// http://dom.spec.whatwg.org/#concept-node-adopt
pub fn adopt(node: JSRef<Node>, document: JSRef<Document>) {
// Step 1.
match node.parent_node().root() {
Some(parent) => {
Node::remove(node, parent.r(), SuppressObserver::Unsuppressed);
}
None => (),
}
// Step 2.
let node_doc = document_from_node(node).root();
if node_doc.r() != document {
for descendant in node.traverse_preorder() {
descendant.set_owner_doc(document);
}
}
// Step 3.
// If node is an element, it is _affected by a base URL change_.
}
// http://dom.spec.whatwg.org/#concept-node-pre-insert
fn pre_insert(node: JSRef<Node>, parent: JSRef<Node>, child: Option<JSRef<Node>>)
-> Fallible<Temporary<Node>> {
// Step 1.
match parent.type_id() {
NodeTypeId::Document |
NodeTypeId::DocumentFragment |
NodeTypeId::Element(..) => (),
_ => return Err(HierarchyRequest)
}
// Step 2.
if node.is_inclusive_ancestor_of(parent) {
return Err(HierarchyRequest);
}
// Step 3.
match child {
Some(child) if !parent.is_parent_of(child) => return Err(NotFound),
_ => ()
}
// Step 4-5.
match node.type_id() {
NodeTypeId::Text => {
if parent.is_document() {
return Err(HierarchyRequest);
}
},
NodeTypeId::DocumentType => {
if !parent.is_document() {
return Err(HierarchyRequest);
}
},
NodeTypeId::DocumentFragment |
NodeTypeId::Element(_) |
NodeTypeId::ProcessingInstruction |
NodeTypeId::Comment => (),
NodeTypeId::Document => return Err(HierarchyRequest)
}
// Step 6.
match parent.type_id() {
NodeTypeId::Document => {
match node.type_id() {
// Step 6.1
NodeTypeId::DocumentFragment => {
// Step 6.1.1(b)
if node.children().any(|c| c.is_text()) {
return Err(HierarchyRequest);
}
match node.child_elements().count() {
0 => (),
// Step 6.1.2
1 => {
if !parent.child_elements().is_empty() {
return Err(HierarchyRequest);
}
match child {
Some(child) => {
if child.inclusively_following_siblings()
.any(|child| child.is_doctype()) {
return Err(HierarchyRequest)
}
}
_ => (),
}
},
// Step 6.1.1(a)
_ => return Err(HierarchyRequest),
}
},
// Step 6.2
NodeTypeId::Element(_) => {
if !parent.child_elements().is_empty() {
return Err(HierarchyRequest);
}
match child {
Some(ref child) => {
if child.inclusively_following_siblings()
.any(|child| child.is_doctype()) {
return Err(HierarchyRequest)
}
}
_ => (),
}
},
// Step 6.3
NodeTypeId::DocumentType => {
if parent.children().any(|c| c.is_doctype()) {
return Err(HierarchyRequest);
}
match child {
Some(ref child) => {
if parent.children()
.take_while(|c| c != child)
.any(|c| c.is_element()) {
return Err(HierarchyRequest);
}
},
None => {
if !parent.child_elements().is_empty() {
return Err(HierarchyRequest);
}
},
}
},
NodeTypeId::Text |
NodeTypeId::ProcessingInstruction |
NodeTypeId::Comment => (),
NodeTypeId::Document => unreachable!(),
}
},
_ => (),
}
// Step 7-8.
let reference_child = match child {
Some(child) if child.clone() == node => node.next_sibling().map(|node| (*node.root()).clone()),
_ => child
};
// Step 9.
let document = document_from_node(parent).root();
Node::adopt(node, *document);
// Step 10.
Node::insert(node, parent, reference_child, SuppressObserver::Unsuppressed);
// Step 11.
return Ok(Temporary::from_rooted(node))
}
// http://dom.spec.whatwg.org/#concept-node-insert
fn insert(node: JSRef<Node>,
parent: JSRef<Node>,
child: Option<JSRef<Node>>,
suppress_observers: SuppressObserver) {
fn do_insert(node: JSRef<Node>, parent: JSRef<Node>, child: Option<JSRef<Node>>) {
parent.add_child(node, child);
let is_in_doc = parent.is_in_doc();
for kid in node.traverse_preorder() {
let mut flags = kid.flags.get();
if is_in_doc {
flags.insert(IS_IN_DOC);
} else {
flags.remove(IS_IN_DOC);
}
kid.flags.set(flags);
}
}
fn fire_observer_if_necessary(node: JSRef<Node>, suppress_observers: SuppressObserver) {
match suppress_observers {
SuppressObserver::Unsuppressed => node.node_inserted(),
SuppressObserver::Suppressed => ()
}
}
// XXX assert owner_doc
// Step 1-3: ranges.
match node.type_id() {
NodeTypeId::DocumentFragment => {
// Step 4.
// Step 5: DocumentFragment, mutation records.
// Step 6: DocumentFragment.
let mut kids = Vec::new();
for kid in node.children() {
kids.push(kid.clone());
Node::remove(kid, node, SuppressObserver::Suppressed);
}
// Step 7: mutation records.
// Step 8.
for kid in kids.iter() {
do_insert((*kid).clone(), parent, child);
}
for kid in kids.into_iter() {
fire_observer_if_necessary(kid, suppress_observers);
}
}
_ => {
// Step 4.
// Step 5: DocumentFragment, mutation records.
// Step 6: DocumentFragment.
// Step 7: mutation records.
// Step 8.
do_insert(node, parent, child);
// Step 9.
fire_observer_if_necessary(node, suppress_observers);
}
}
}
// http://dom.spec.whatwg.org/#concept-node-replace-all
fn replace_all(node: Option<JSRef<Node>>, parent: JSRef<Node>) {
// Step 1.
match node {
Some(node) => {
let document = document_from_node(parent).root();
Node::adopt(node, document.r());
}
None => (),
}
// Step 2.
let removed_nodes: Vec<JSRef<Node>> = parent.children().collect();
// Step 3.
let added_nodes = match node {
None => vec!(),
Some(node) => match node.type_id() {
NodeTypeId::DocumentFragment => node.children().collect(),
_ => vec!(node.clone()),
},
};
// Step 4.
for child in parent.children() {
Node::remove(child, parent, SuppressObserver::Suppressed);
}
// Step 5.
match node {
Some(node) => Node::insert(node, parent, None, SuppressObserver::Suppressed),
None => (),
}
// Step 6: mutation records.
// Step 7.
let parent_in_doc = parent.is_in_doc();
for removed_node in removed_nodes.iter() {
removed_node.node_removed(parent_in_doc);
}
for added_node in added_nodes.iter() {
added_node.node_inserted();
}
}
// http://dom.spec.whatwg.org/#concept-node-pre-remove
fn pre_remove(child: JSRef<Node>, parent: JSRef<Node>) -> Fallible<Temporary<Node>> {
// Step 1.
match child.parent_node() {
Some(ref node) if node != &Temporary::from_rooted(parent) => return Err(NotFound),
None => return Err(NotFound),
_ => ()
}
// Step 2.
Node::remove(child, parent, SuppressObserver::Unsuppressed);
// Step 3.
Ok(Temporary::from_rooted(child))
}
// http://dom.spec.whatwg.org/#concept-node-remove
fn remove(node: JSRef<Node>, parent: JSRef<Node>, suppress_observers: SuppressObserver) {
assert!(node.parent_node().map_or(false, |node_parent| node_parent == Temporary::from_rooted(parent)));
// Step 1-5: ranges.
// Step 6-7: mutation observers.
// Step 8.
parent.remove_child(node);
node.set_flag(IS_IN_DOC, false);
// Step 9.
match suppress_observers {
SuppressObserver::Suppressed => (),
SuppressObserver::Unsuppressed => node.node_removed(parent.is_in_doc()),
}
}
// http://dom.spec.whatwg.org/#concept-node-clone
pub fn clone(node: JSRef<Node>, maybe_doc: Option<JSRef<Document>>,
clone_children: CloneChildrenFlag) -> Temporary<Node> {
// Step 1.
let document = match maybe_doc {
Some(doc) => JS::from_rooted(doc).root(),
None => node.owner_doc().root()
};
// Step 2.
// XXXabinader: clone() for each node as trait?
let copy: Root<Node> = match node.type_id() {
NodeTypeId::DocumentType => {
let doctype: JSRef<DocumentType> = DocumentTypeCast::to_ref(node).unwrap();
let doctype = DocumentType::new(doctype.name().clone(),
Some(doctype.public_id().clone()),
Some(doctype.system_id().clone()), document.r());
NodeCast::from_temporary(doctype)
},
NodeTypeId::DocumentFragment => {
let doc_fragment = DocumentFragment::new(document.r());
NodeCast::from_temporary(doc_fragment)
},
NodeTypeId::Comment => {
let comment: JSRef<Comment> = CommentCast::to_ref(node).unwrap();
let comment = Comment::new(comment.characterdata().data().clone(), document.r());
NodeCast::from_temporary(comment)
},
NodeTypeId::Document => {
let document: JSRef<Document> = DocumentCast::to_ref(node).unwrap();
let is_html_doc = match document.is_html_document() {
true => IsHTMLDocument::HTMLDocument,
false => IsHTMLDocument::NonHTMLDocument,
};
let window = document.window().root();
let document = Document::new(window.r(), Some(document.url().clone()),
is_html_doc, None,
DocumentSource::NotFromParser);
NodeCast::from_temporary(document)
},
NodeTypeId::Element(..) => {
let element: JSRef<Element> = ElementCast::to_ref(node).unwrap();
let name = QualName {
ns: element.namespace().clone(),
local: element.local_name().clone()
};
let element = Element::create(name,
element.prefix().as_ref().map(|p| p.as_slice().to_owned()),
document.r(), ElementCreator::ScriptCreated);
NodeCast::from_temporary(element)
},
NodeTypeId::Text => {
let text: JSRef<Text> = TextCast::to_ref(node).unwrap();
let text = Text::new(text.characterdata().data().clone(), document.r());
NodeCast::from_temporary(text)
},
NodeTypeId::ProcessingInstruction => {
let pi: JSRef<ProcessingInstruction> = ProcessingInstructionCast::to_ref(node).unwrap();
let pi = ProcessingInstruction::new(pi.target().clone(),
pi.characterdata().data().clone(), document.r());
NodeCast::from_temporary(pi)
},
}.root();
// Step 3.
let document = match DocumentCast::to_ref(copy.r()) {
Some(doc) => doc,
None => document.r(),
};
assert!(copy.r().owner_doc().root().r() == document);
// Step 4 (some data already copied in step 2).
match node.type_id() {
NodeTypeId::Document => {
let node_doc: JSRef<Document> = DocumentCast::to_ref(node).unwrap();
let copy_doc: JSRef<Document> = DocumentCast::to_ref(copy.r()).unwrap();
copy_doc.set_encoding_name(node_doc.encoding_name().clone());
copy_doc.set_quirks_mode(node_doc.quirks_mode());
},
NodeTypeId::Element(..) => {
let node_elem: JSRef<Element> = ElementCast::to_ref(node).unwrap();
let copy_elem: JSRef<Element> = ElementCast::to_ref(copy.r()).unwrap();
// FIXME: https://github.com/mozilla/servo/issues/1737
let window = document.window().root();
for attr in node_elem.attrs().iter().map(|attr| attr.root()) {
copy_elem.attrs_mut().push_unrooted(
&Attr::new(window.r(),
attr.r().local_name().clone(), attr.r().value().clone(),
attr.r().name().clone(), attr.r().namespace().clone(),
attr.r().prefix().clone(), Some(copy_elem)));
}
},
_ => ()
}
// Step 5: cloning steps.
vtable_for(&node).cloning_steps(copy.r(), maybe_doc, clone_children);
// Step 6.
if clone_children == CloneChildrenFlag::CloneChildren {
for child in node.children() {
let child_copy = Node::clone(child, Some(document), clone_children).root();
let _inserted_node = Node::pre_insert(child_copy.r(), copy.r(), None);
}
}
// Step 7.
Temporary::from_rooted(copy.r())
}
/// Sends layout data, if any, back to the layout task to be destroyed.
unsafe fn reap_layout_data(&mut self) {
if self.layout_data.is_present() {
let layout_data = mem::replace(&mut self.layout_data, LayoutDataRef::new());
let layout_chan = layout_data.take_chan();
match layout_chan {
None => {}
Some(chan) => {
let LayoutChan(chan) = chan;
chan.send(Msg::ReapLayoutData(layout_data)).unwrap()
},
}
}
}
pub fn collect_text_contents<'a, T: Iterator<Item=JSRef<'a, Node>>>(mut iterator: T) -> String {
let mut content = String::new();
for node in iterator {
let text: Option<JSRef<Text>> = TextCast::to_ref(node);
match text {
Some(text) => content.push_str(text.characterdata().data().as_slice()),
None => (),
}
}
content
}
}
impl<'a> NodeMethods for JSRef<'a, Node> {
// http://dom.spec.whatwg.org/#dom-node-nodetype
fn NodeType(self) -> u16 {
match self.type_id {
NodeTypeId::Element(_) => NodeConstants::ELEMENT_NODE,
NodeTypeId::Text => NodeConstants::TEXT_NODE,
NodeTypeId::ProcessingInstruction => NodeConstants::PROCESSING_INSTRUCTION_NODE,
NodeTypeId::Comment => NodeConstants::COMMENT_NODE,
NodeTypeId::Document => NodeConstants::DOCUMENT_NODE,
NodeTypeId::DocumentType => NodeConstants::DOCUMENT_TYPE_NODE,
NodeTypeId::DocumentFragment => NodeConstants::DOCUMENT_FRAGMENT_NODE,
}
}
// http://dom.spec.whatwg.org/#dom-node-nodename
fn NodeName(self) -> DOMString {
match self.type_id {
NodeTypeId::Element(..) => {
let elem: JSRef<Element> = ElementCast::to_ref(self).unwrap();
elem.TagName()
}
NodeTypeId::Text => "#text".to_owned(),
NodeTypeId::ProcessingInstruction => {
let processing_instruction: JSRef<ProcessingInstruction> =
ProcessingInstructionCast::to_ref(self).unwrap();
processing_instruction.Target()
}
NodeTypeId::Comment => "#comment".to_owned(),
NodeTypeId::DocumentType => {
let doctype: JSRef<DocumentType> = DocumentTypeCast::to_ref(self).unwrap();
doctype.name().clone()
},
NodeTypeId::DocumentFragment => "#document-fragment".to_owned(),
NodeTypeId::Document => "#document".to_owned()
}
}
// http://dom.spec.whatwg.org/#dom-node-baseuri
fn GetBaseURI(self) -> Option<DOMString> {
// FIXME (#1824) implement.
None
}
// http://dom.spec.whatwg.org/#dom-node-ownerdocument
fn GetOwnerDocument(self) -> Option<Temporary<Document>> {
match self.type_id {
NodeTypeId::Element(..) |
NodeTypeId::Comment |
NodeTypeId::Text |
NodeTypeId::ProcessingInstruction |
NodeTypeId::DocumentType |
NodeTypeId::DocumentFragment => Some(self.owner_doc()),
NodeTypeId::Document => None
}
}
// http://dom.spec.whatwg.org/#dom-node-parentnode
fn GetParentNode(self) -> Option<Temporary<Node>> {
self.parent_node.get()
}
// http://dom.spec.whatwg.org/#dom-node-parentelement
fn GetParentElement(self) -> Option<Temporary<Element>> {
self.parent_node.get()
.and_then(|parent| {
let parent = parent.root();
ElementCast::to_ref(parent.r()).map(|elem| {
Temporary::from_rooted(elem)
})
})
}
// http://dom.spec.whatwg.org/#dom-node-haschildnodes
fn HasChildNodes(self) -> bool {
self.first_child.get().is_some()
}
// http://dom.spec.whatwg.org/#dom-node-childnodes
fn ChildNodes(self) -> Temporary<NodeList> {
self.child_list.or_init(|| {
let doc = self.owner_doc().root();
let window = doc.r().window().root();
NodeList::new_child_list(window.r(), self)
})
}
// http://dom.spec.whatwg.org/#dom-node-firstchild
fn GetFirstChild(self) -> Option<Temporary<Node>> {
self.first_child.get()
}
// http://dom.spec.whatwg.org/#dom-node-lastchild
fn GetLastChild(self) -> Option<Temporary<Node>> {
self.last_child.get()
}
// http://dom.spec.whatwg.org/#dom-node-previoussibling
fn GetPreviousSibling(self) -> Option<Temporary<Node>> {
self.prev_sibling.get()
}
// http://dom.spec.whatwg.org/#dom-node-nextsibling
fn GetNextSibling(self) -> Option<Temporary<Node>> {
self.next_sibling.get()
}
// http://dom.spec.whatwg.org/#dom-node-nodevalue
fn GetNodeValue(self) -> Option<DOMString> {
match self.type_id {
NodeTypeId::Comment |
NodeTypeId::Text |
NodeTypeId::ProcessingInstruction => {
let chardata: JSRef<CharacterData> = CharacterDataCast::to_ref(self).unwrap();
Some(chardata.Data())
}
_ => {
None
}
}
}
// http://dom.spec.whatwg.org/#dom-node-nodevalue
fn SetNodeValue(self, val: Option<DOMString>) {
match self.type_id {
NodeTypeId::Comment |
NodeTypeId::Text |
NodeTypeId::ProcessingInstruction => {
self.SetTextContent(val)
}
_ => {}
}
}
// http://dom.spec.whatwg.org/#dom-node-textcontent
fn GetTextContent(self) -> Option<DOMString> {
match self.type_id {
NodeTypeId::DocumentFragment |
NodeTypeId::Element(..) => {
let content = Node::collect_text_contents(self.traverse_preorder());
Some(content)
}
NodeTypeId::Comment |
NodeTypeId::Text |
NodeTypeId::ProcessingInstruction => {
let characterdata: JSRef<CharacterData> = CharacterDataCast::to_ref(self).unwrap();
Some(characterdata.Data())
}
NodeTypeId::DocumentType |
NodeTypeId::Document => {
None
}
}
}
// http://dom.spec.whatwg.org/#dom-node-textcontent
fn SetTextContent(self, value: Option<DOMString>) {
let value = null_str_as_empty(&value);
match self.type_id {
NodeTypeId::DocumentFragment |
NodeTypeId::Element(..) => {
// Step 1-2.
let node = if value.len() == 0 {
None
} else {
let document = self.owner_doc().root();
Some(NodeCast::from_temporary(document.r().CreateTextNode(value)))
}.root();
// Step 3.
Node::replace_all(node.r(), self);
}
NodeTypeId::Comment |
NodeTypeId::Text |
NodeTypeId::ProcessingInstruction => {
let characterdata: JSRef<CharacterData> = CharacterDataCast::to_ref(self).unwrap();
characterdata.set_data(value);
// Notify the document that the content of this node is different
let document = self.owner_doc().root();
document.r().content_changed(self, NodeDamage::OtherNodeDamage);
}
NodeTypeId::DocumentType |
NodeTypeId::Document => {}
}
}
// http://dom.spec.whatwg.org/#dom-node-insertbefore
fn InsertBefore(self, node: JSRef<Node>, child: Option<JSRef<Node>>) -> Fallible<Temporary<Node>> {
Node::pre_insert(node, self, child)
}
// http://dom.spec.whatwg.org/#dom-node-appendchild
fn AppendChild(self, node: JSRef<Node>) -> Fallible<Temporary<Node>> {
Node::pre_insert(node, self, None)
}
// http://dom.spec.whatwg.org/#concept-node-replace
fn ReplaceChild(self, node: JSRef<Node>, child: JSRef<Node>) -> Fallible<Temporary<Node>> {
// Step 1.
match self.type_id {
NodeTypeId::Document |
NodeTypeId::DocumentFragment |
NodeTypeId::Element(..) => (),
_ => return Err(HierarchyRequest)
}
// Step 2.
if node.is_inclusive_ancestor_of(self) {
return Err(HierarchyRequest);
}
// Step 3.
if !self.is_parent_of(child) {
return Err(NotFound);
}
// Step 4-5.
match node.type_id() {
NodeTypeId::Text if self.is_document() => return Err(HierarchyRequest),
NodeTypeId::DocumentType if !self.is_document() => return Err(HierarchyRequest),
NodeTypeId::DocumentFragment |
NodeTypeId::DocumentType |
NodeTypeId::Element(..) |
NodeTypeId::Text |
NodeTypeId::ProcessingInstruction |
NodeTypeId::Comment => (),
NodeTypeId::Document => return Err(HierarchyRequest)
}
// Step 6.
match self.type_id {
NodeTypeId::Document => {
match node.type_id() {
// Step 6.1
NodeTypeId::DocumentFragment => {
// Step 6.1.1(b)
if node.children().any(|c| c.is_text()) {
return Err(HierarchyRequest);
}
match node.child_elements().count() {
0 => (),
// Step 6.1.2
1 => {
if self.child_elements().any(|c| NodeCast::from_ref(c) != child) {
return Err(HierarchyRequest);
}
if child.following_siblings()
.any(|child| child.is_doctype()) {
return Err(HierarchyRequest);
}
},
// Step 6.1.1(a)
_ => return Err(HierarchyRequest)
}
},
// Step 6.2
NodeTypeId::Element(..) => {
if self.child_elements().any(|c| NodeCast::from_ref(c) != child) {
return Err(HierarchyRequest);
}
if child.following_siblings()
.any(|child| child.is_doctype()) {
return Err(HierarchyRequest);
}
},
// Step 6.3
NodeTypeId::DocumentType => {
if self.children().any(|c| c.is_doctype() && c != child) {
return Err(HierarchyRequest);
}
if self.children()
.take_while(|c| *c != child)
.any(|c| c.is_element()) {
return Err(HierarchyRequest);
}
},
NodeTypeId::Text |
NodeTypeId::ProcessingInstruction |
NodeTypeId::Comment => (),
NodeTypeId::Document => unreachable!()
}
},
_ => ()
}
// Ok if not caught by previous error checks.
if node.clone() == child {
return Ok(Temporary::from_rooted(child));
}
// Step 7-8.
let next_sibling = child.next_sibling().map(|node| (*node.root()).clone());
let reference_child = match next_sibling {
Some(sibling) if sibling == node => node.next_sibling().map(|node| (*node.root()).clone()),
_ => next_sibling
};
// Step 9.
let document = document_from_node(self).root();
Node::adopt(node, document.r());
{
// Step 10.
Node::remove(child, self, SuppressObserver::Suppressed);
// Step 11.
Node::insert(node, self, reference_child, SuppressObserver::Suppressed);
}
// Step 12-14.
// Step 13: mutation records.
child.node_removed(self.is_in_doc());
if node.type_id() == NodeTypeId::DocumentFragment {
for child_node in node.children() {
child_node.node_inserted();
}
} else {
node.node_inserted();
}
// Step 15.
Ok(Temporary::from_rooted(child))
}
// http://dom.spec.whatwg.org/#dom-node-removechild
fn RemoveChild(self, node: JSRef<Node>)
-> Fallible<Temporary<Node>> {
Node::pre_remove(node, self)
}
// http://dom.spec.whatwg.org/#dom-node-normalize
fn Normalize(self) {
let mut prev_text = None;
for child in self.children() {
let t: Option<JSRef<Text>> = TextCast::to_ref(child);
match t {
Some(text) => {
let characterdata: JSRef<CharacterData> = CharacterDataCast::from_ref(text);
if characterdata.Length() == 0 {
self.remove_child(child);
} else {
match prev_text {
Some(text_node) => {
let prev_characterdata: JSRef<CharacterData> = CharacterDataCast::from_ref(text_node);
let _ = prev_characterdata.AppendData(characterdata.Data());
self.remove_child(child);
},
None => prev_text = Some(text)
}
}
},
None => {
child.Normalize();
prev_text = None;
}
}
}
}
// http://dom.spec.whatwg.org/#dom-node-clonenode
fn CloneNode(self, deep: bool) -> Temporary<Node> {
Node::clone(self, None, if deep {
CloneChildrenFlag::CloneChildren
} else {
CloneChildrenFlag::DoNotCloneChildren
})
}
// http://dom.spec.whatwg.org/#dom-node-isequalnode
fn IsEqualNode(self, maybe_node: Option<JSRef<Node>>) -> bool {
fn is_equal_doctype(node: JSRef<Node>, other: JSRef<Node>) -> bool {
let doctype: JSRef<DocumentType> = DocumentTypeCast::to_ref(node).unwrap();
let other_doctype: JSRef<DocumentType> = DocumentTypeCast::to_ref(other).unwrap();
(*doctype.name() == *other_doctype.name()) &&
(*doctype.public_id() == *other_doctype.public_id()) &&
(*doctype.system_id() == *other_doctype.system_id())
}
fn is_equal_element(node: JSRef<Node>, other: JSRef<Node>) -> bool {
let element: JSRef<Element> = ElementCast::to_ref(node).unwrap();
let other_element: JSRef<Element> = ElementCast::to_ref(other).unwrap();
// FIXME: namespace prefix
(*element.namespace() == *other_element.namespace()) &&
(*element.local_name() == *other_element.local_name()) &&
(element.attrs().len() == other_element.attrs().len())
}
fn is_equal_processinginstruction(node: JSRef<Node>, other: JSRef<Node>) -> bool {
let pi: JSRef<ProcessingInstruction> = ProcessingInstructionCast::to_ref(node).unwrap();
let other_pi: JSRef<ProcessingInstruction> = ProcessingInstructionCast::to_ref(other).unwrap();
(*pi.target() == *other_pi.target()) &&
(*pi.characterdata().data() == *other_pi.characterdata().data())
}
fn is_equal_characterdata(node: JSRef<Node>, other: JSRef<Node>) -> bool {
let characterdata: JSRef<CharacterData> = CharacterDataCast::to_ref(node).unwrap();
let other_characterdata: JSRef<CharacterData> = CharacterDataCast::to_ref(other).unwrap();
*characterdata.data() == *other_characterdata.data()
}
fn is_equal_element_attrs(node: JSRef<Node>, other: JSRef<Node>) -> bool {
let element: JSRef<Element> = ElementCast::to_ref(node).unwrap();
let other_element: JSRef<Element> = ElementCast::to_ref(other).unwrap();
assert!(element.attrs().len() == other_element.attrs().len());
element.attrs().iter().map(|attr| attr.root()).all(|attr| {
other_element.attrs().iter().map(|attr| attr.root()).any(|other_attr| {
(*attr.r().namespace() == *other_attr.r().namespace()) &&
(attr.r().local_name() == other_attr.r().local_name()) &&
(attr.r().value().as_slice() == other_attr.r().value().as_slice())
})
})
}
fn is_equal_node(this: JSRef<Node>, node: JSRef<Node>) -> bool {
// Step 2.
if this.type_id() != node.type_id() {
return false;
}
match node.type_id() {
// Step 3.
NodeTypeId::DocumentType if !is_equal_doctype(this, node) => return false,
NodeTypeId::Element(..) if !is_equal_element(this, node) => return false,
NodeTypeId::ProcessingInstruction if !is_equal_processinginstruction(this, node) => return false,
NodeTypeId::Text |
NodeTypeId::Comment if !is_equal_characterdata(this, node) => return false,
// Step 4.
NodeTypeId::Element(..) if !is_equal_element_attrs(this, node) => return false,
_ => ()
}
// Step 5.
if this.children().count() != node.children().count() {
return false;
}
// Step 6.
this.children().zip(node.children()).all(|(ref child, ref other_child)| {
is_equal_node(*child, *other_child)
})
}
match maybe_node {
// Step 1.
None => false,
// Step 2-6.
Some(node) => is_equal_node(self, node)
}
}
// http://dom.spec.whatwg.org/#dom-node-comparedocumentposition
fn CompareDocumentPosition(self, other: JSRef<Node>) -> u16 {
if self.clone() == other { // FIXME: See issue #3960
// step 2.
0
} else {
let mut lastself = self.clone();
let mut lastother = other.clone();
for ancestor in self.ancestors() {
if ancestor == other {
// step 4.
return NodeConstants::DOCUMENT_POSITION_CONTAINS +
NodeConstants::DOCUMENT_POSITION_PRECEDING;
}
lastself = ancestor.clone();
}
for ancestor in other.ancestors() {
if ancestor == self {
// step 5.
return NodeConstants::DOCUMENT_POSITION_CONTAINED_BY +
NodeConstants::DOCUMENT_POSITION_FOLLOWING;
}
lastother = ancestor.clone();
}
if lastself != lastother {
let abstract_uint: uintptr_t = as_uintptr(&self);
let other_uint: uintptr_t = as_uintptr(&*other);
let random = if abstract_uint < other_uint {
NodeConstants::DOCUMENT_POSITION_FOLLOWING
} else {
NodeConstants::DOCUMENT_POSITION_PRECEDING
};
// step 3.
return random +
NodeConstants::DOCUMENT_POSITION_DISCONNECTED +
NodeConstants::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC;
}
for child in lastself.traverse_preorder() {
if child == other {
// step 6.
return NodeConstants::DOCUMENT_POSITION_PRECEDING;
}
if child == self {
// step 7.
return NodeConstants::DOCUMENT_POSITION_FOLLOWING;
}
}
unreachable!()
}
}
// http://dom.spec.whatwg.org/#dom-node-contains
fn Contains(self, maybe_other: Option<JSRef<Node>>) -> bool {
match maybe_other {
None => false,
Some(other) => self.is_inclusive_ancestor_of(other)
}
}
// http://dom.spec.whatwg.org/#dom-node-lookupprefix
fn LookupPrefix(self, _prefix: Option<DOMString>) -> Option<DOMString> {
// FIXME (#1826) implement.
None
}
// http://dom.spec.whatwg.org/#dom-node-lookupnamespaceuri
fn LookupNamespaceURI(self, _namespace: Option<DOMString>) -> Option<DOMString> {
// FIXME (#1826) implement.
None
}
// http://dom.spec.whatwg.org/#dom-node-isdefaultnamespace
fn IsDefaultNamespace(self, _namespace: Option<DOMString>) -> bool {
// FIXME (#1826) implement.
false
}
}
/// The address of a node known to be valid. These are sent from script to layout,
/// and are also used in the HTML parser interface.
#[allow(raw_pointer_derive)]
#[derive(Clone, PartialEq, Eq, Copy)]
pub struct TrustedNodeAddress(pub *const c_void);
unsafe impl Send for TrustedNodeAddress {}
pub fn document_from_node<T: NodeBase+Reflectable>(derived: JSRef<T>) -> Temporary<Document> {
let node: JSRef<Node> = NodeCast::from_ref(derived);
node.owner_doc()
}
pub fn window_from_node<T: NodeBase+Reflectable>(derived: JSRef<T>) -> Temporary<Window> {
let document = document_from_node(derived).root();
document.r().window()
}
impl<'a> VirtualMethods for JSRef<'a, Node> {
fn super_type<'b>(&'b self) -> Option<&'b VirtualMethods> {
let eventtarget: &JSRef<EventTarget> = EventTargetCast::from_borrowed_ref(self);
Some(eventtarget as &VirtualMethods)
}
}
impl<'a> style::node::TNode<'a, JSRef<'a, Element>> for JSRef<'a, Node> {
fn parent_node(self) -> Option<JSRef<'a, Node>> {
// FIXME(zwarich): Remove this when UFCS lands and there is a better way
// of disambiguating methods.
fn parent_node<'a, T: NodeHelpers<'a>>(this: T) -> Option<Temporary<Node>> {
this.parent_node()
}
parent_node(self).map(|node| *node.root())
}
fn first_child(self) -> Option<JSRef<'a, Node>> {
// FIXME(zwarich): Remove this when UFCS lands and there is a better way
// of disambiguating methods.
fn first_child<'a, T: NodeHelpers<'a>>(this: T) -> Option<Temporary<Node>> {
this.first_child()
}
first_child(self).map(|node| *node.root())
}
fn last_child(self) -> Option<JSRef<'a, Node>> {
// FIXME(zwarich): Remove this when UFCS lands and there is a better way
// of disambiguating methods.
fn last_child<'a, T: NodeHelpers<'a>>(this: T) -> Option<Temporary<Node>> {
this.last_child()
}
last_child(self).map(|node| *node.root())
}
fn prev_sibling(self) -> Option<JSRef<'a, Node>> {
// FIXME(zwarich): Remove this when UFCS lands and there is a better way
// of disambiguating methods.
fn prev_sibling<'a, T: NodeHelpers<'a>>(this: T) -> Option<Temporary<Node>> {
this.prev_sibling()
}
prev_sibling(self).map(|node| *node.root())
}
fn next_sibling(self) -> Option<JSRef<'a, Node>> {
// FIXME(zwarich): Remove this when UFCS lands and there is a better way
// of disambiguating methods.
fn next_sibling<'a, T: NodeHelpers<'a>>(this: T) -> Option<Temporary<Node>> {
this.next_sibling()
}
next_sibling(self).map(|node| *node.root())
}
fn is_document(self) -> bool {
// FIXME(zwarich): Remove this when UFCS lands and there is a better way
// of disambiguating methods.
fn is_document<'a, T: NodeHelpers<'a>>(this: T) -> bool {
this.is_document()
}
is_document(self)
}
fn is_element(self) -> bool {
// FIXME(zwarich): Remove this when UFCS lands and there is a better way
// of disambiguating methods.
fn is_element<'a, T: NodeHelpers<'a>>(this: T) -> bool {
this.is_element()
}
is_element(self)
}
fn as_element(self) -> JSRef<'a, Element> {
ElementCast::to_ref(self).unwrap()
}
fn match_attr<F>(self, attr: &AttrSelector, test: F) -> bool
where F: Fn(&str) -> bool
{
let name = {
if self.is_html_element_in_html_document() {
&attr.lower_name
} else {
&attr.name
}
};
match attr.namespace {
NamespaceConstraint::Specific(ref ns) => {
self.as_element().get_attribute(ns.clone(), name).root()
.map_or(false, |attr| test(attr.r().value().as_slice()))
},
NamespaceConstraint::Any => {
self.as_element().get_attributes(name).into_iter()
.map(|attr| attr.root())
.any(|attr| test(attr.r().value().as_slice()))
}
}
}
fn is_html_element_in_html_document(self) -> bool {
self.as_element().html_element_in_html_document()
}
fn has_changed(self) -> bool { self.get_has_changed() }
unsafe fn set_changed(self, value: bool) { self.set_has_changed(value) }
fn is_dirty(self) -> bool { self.get_is_dirty() }
unsafe fn set_dirty(self, value: bool) { self.set_is_dirty(value) }
fn has_dirty_siblings(self) -> bool { self.get_has_dirty_siblings() }
unsafe fn set_dirty_siblings(self, value: bool) { self.set_has_dirty_siblings(value) }
fn has_dirty_descendants(self) -> bool { self.get_has_dirty_descendants() }
unsafe fn set_dirty_descendants(self, value: bool) { self.set_has_dirty_descendants(value) }
}
pub trait DisabledStateHelpers {
fn check_ancestors_disabled_state_for_form_control(self);
fn check_parent_disabled_state_for_option(self);
fn check_disabled_attribute(self);
}
impl<'a> DisabledStateHelpers for JSRef<'a, Node> {
fn check_ancestors_disabled_state_for_form_control(self) {
if self.get_disabled_state() { return; }
for ancestor in self.ancestors().filter(|ancestor| ancestor.is_htmlfieldsetelement()) {
if !ancestor.get_disabled_state() { continue; }
if ancestor.is_parent_of(self) {
self.set_disabled_state(true);
self.set_enabled_state(false);
return;
}
match ancestor.children().find(|child| child.is_htmllegendelement()) {
Some(legend) => {
// XXXabinader: should we save previous ancestor to avoid this iteration?
if self.ancestors().any(|ancestor| ancestor == legend) { continue; }
},
None => ()
}
self.set_disabled_state(true);
self.set_enabled_state(false);
return;
}
}
fn check_parent_disabled_state_for_option(self) {
if self.get_disabled_state() { return; }
match self.parent_node().root() {
Some(ref parent) if parent.r().is_htmloptgroupelement() && parent.r().get_disabled_state() => {
self.set_disabled_state(true);
self.set_enabled_state(false);
},
_ => ()
}
}
fn check_disabled_attribute(self) {
let elem: JSRef<'a, Element> = ElementCast::to_ref(self).unwrap();
let has_disabled_attrib = elem.has_attribute(&atom!("disabled"));
self.set_disabled_state(has_disabled_attrib);
self.set_enabled_state(!has_disabled_attrib);
}
}
/// A summary of the changes that happened to a node.
#[derive(Copy, Clone, PartialEq)]
pub enum NodeDamage {
/// The node's `style` attribute changed.
NodeStyleDamaged,
/// Other parts of a node changed; attributes, text content, etc.
OtherNodeDamage,
}
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