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servo/components/script/dom/node.rs
Patrick Walton 72f031e2a1 layout: Support inline incremental reflow, and stop reconstructing all 
flows when mousing over the document.

This exposes more "jumpiness" on sites like Hacker News, but the bug
that causes it was pre-existing.
2015-05-19 11:08:27 -07:00

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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 document_loader::DocumentLoader;
use dom::attr::{Attr, AttrHelpers};
use dom::bindings::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::AttrBinding::AttrMethods;
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::{CharacterDataCast, DocumentCast, DocumentTypeCast};
use dom::bindings::codegen::InheritTypes::{ElementCast, NodeCast, ElementDerived, EventTargetCast};
use dom::bindings::codegen::InheritTypes::{HTMLLegendElementDerived, HTMLFieldSetElementDerived};
use dom::bindings::codegen::InheritTypes::{HTMLOptGroupElementDerived, NodeBase, NodeDerived};
use dom::bindings::codegen::InheritTypes::{ProcessingInstructionCast, TextCast};
use dom::bindings::codegen::UnionTypes::NodeOrString;
use dom::bindings::conversions;
use dom::bindings::error::{ErrorResult, Fallible};
use dom::bindings::error::Error::{NotFound, HierarchyRequest, Syntax};
use dom::bindings::global::GlobalRef;
use dom::bindings::js::{JS, JSRef, LayoutJS, MutNullableHeap};
use dom::bindings::js::{OptionalRootable, ResultRootable, Root, Rootable};
use dom::bindings::js::{RootedReference, Temporary, TemporaryPushable};
use dom::bindings::js::Unrooted;
use dom::bindings::trace::JSTraceable;
use dom::bindings::trace::RootedVec;
use dom::bindings::utils::{Reflectable, reflect_dom_object};
use dom::characterdata::{CharacterData, CharacterDataHelpers, CharacterDataTypeId};
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, ProcessingInstructionHelpers};
use dom::text::Text;
use dom::virtualmethods::{VirtualMethods, vtable_for};
use dom::window::{Window, WindowHelpers};
use geom::rect::Rect;
use layout_interface::{LayoutChan, Msg};
use devtools_traits::NodeInfo;
use parse::html::parse_html_fragment;
use script_traits::UntrustedNodeAddress;
use util::geometry::Au;
use util::str::{DOMString, null_str_as_empty};
use selectors::parser::{Selector, AttrSelector, NamespaceConstraint};
use selectors::parser::parse_author_origin_selector_list_from_str;
use selectors::matching::matches;
use style::properties::ComputedValues;
use style;
use js::jsapi::{JSContext, JSObject, 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::{Atom, 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: MutNullableHeap<JS<Node>>,
/// The first child of this node.
first_child: MutNullableHeap<JS<Node>>,
/// The last child of this node.
last_child: MutNullableHeap<JS<Node>>,
/// The next sibling of this node.
next_sibling: MutNullableHeap<JS<Node>>,
/// The previous sibling of this node.
prev_sibling: MutNullableHeap<JS<Node>>,
/// The document that this node belongs to.
owner_doc: MutNullableHeap<JS<Document>>,
/// The live list of children return by .childNodes.
child_list: MutNullableHeap<JS<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,
#[doc = "Specifies whether this node has the focus."]
const IN_FOCUS_STATE = 0x200,
}
}
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,
}
}
}
impl Drop for Node {
#[allow(unsafe_code)]
fn drop(&mut self) {
self.layout_data.dispose();
}
}
/// suppress observers flag
/// https://dom.spec.whatwg.org/#concept-node-insert
/// https://dom.spec.whatwg.org/#concept-node-remove
#[derive(Copy, Clone)]
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 ()>,
}
#[allow(unsafe_code)]
unsafe impl Send for LayoutData {}
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),
}
}
/// Sends layout data, if any, back to the layout task to be destroyed.
pub fn dispose(&self) {
if let Some(mut layout_data) = mem::replace(&mut *self.borrow_mut(), None) {
let layout_chan = layout_data.chan.take();
match layout_chan {
None => {}
Some(chan) => {
let LayoutChan(chan) = chan;
chan.send(Msg::ReapLayoutData(layout_data)).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]
#[allow(unsafe_code)]
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()
}
}
/// The different types of nodes.
#[derive(Copy, Clone, PartialEq, Debug)]
#[jstraceable]
pub enum NodeTypeId {
CharacterData(CharacterDataTypeId),
DocumentType,
DocumentFragment,
Document,
Element(ElementTypeId),
}
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> {
// https://dom.spec.whatwg.org/#node-is-inserted
fn node_inserted(self) {
assert!(self.parent_node.get().is_some());
let document = document_from_node(self).root();
let is_in_doc = self.is_in_doc();
for node in self.traverse_preorder() {
let node = node.root();
vtable_for(&node.r()).bind_to_tree(is_in_doc);
}
let parent = self.parent_node.get().root();
parent.r().map(|parent| vtable_for(&parent).child_inserted(self));
document.r().content_and_heritage_changed(self, NodeDamage::OtherNodeDamage);
}
// https://dom.spec.whatwg.org/#node-is-removed
fn node_removed(self, parent_in_doc: bool) {
assert!(self.parent_node.get().is_none());
for node in self.traverse_preorder() {
let node = node.root();
vtable_for(&node.r()).unbind_from_tree(parent_in_doc);
}
self.layout_data.dispose();
}
//
// 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.get().is_none());
assert!(new_child.prev_sibling.get().is_none());
assert!(new_child.next_sibling.get().is_none());
match before {
Some(ref before) => {
assert!(before.parent_node.get().root().r() == Some(self));
match before.prev_sibling.get().root() {
None => {
assert!(Some(*before) == self.first_child.get().root().r());
self.first_child.set(Some(JS::from_rooted(new_child)));
},
Some(ref prev_sibling) => {
prev_sibling.r().next_sibling.set(Some(JS::from_rooted(new_child)));
new_child.prev_sibling.set(Some(JS::from_rooted(prev_sibling.r())));
},
}
before.prev_sibling.set(Some(JS::from_rooted(new_child)));
new_child.next_sibling.set(Some(JS::from_rooted(*before)));
},
None => {
match self.last_child.get().root() {
None => self.first_child.set(Some(JS::from_rooted(new_child))),
Some(ref last_child) => {
assert!(last_child.r().next_sibling.get().is_none());
last_child.r().next_sibling.set(Some(JS::from_rooted(new_child)));
new_child.prev_sibling.set(Some(JS::from_rooted(last_child.r())));
}
}
self.last_child.set(Some(JS::from_rooted(new_child)));
},
}
new_child.parent_node.set(Some(JS::from_rooted(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.get().root().r() == Some(self));
match child.prev_sibling.get().root() {
None => {
self.first_child.set(child.next_sibling.get());
}
Some(ref prev_sibling) => {
prev_sibling.r().next_sibling.set(child.next_sibling.get());
}
}
match child.next_sibling.get().root() {
None => {
self.last_child.set(child.prev_sibling.get());
}
Some(ref next_sibling) => {
next_sibling.r().prev_sibling.set(child.prev_sibling.get());
}
}
child.prev_sibling.set(None);
child.next_sibling.set(None);
child.parent_node.set(None);
}
}
pub struct QuerySelectorIterator {
selectors: Vec<Selector>,
iterator: TreeIterator,
}
impl<'a> QuerySelectorIterator {
#[allow(unsafe_code)]
unsafe fn new(iter: TreeIterator, selectors: Vec<Selector>)
-> QuerySelectorIterator {
QuerySelectorIterator {
selectors: selectors,
iterator: iter,
}
}
}
impl<'a> Iterator for QuerySelectorIterator {
type Item = Temporary<Node>;
fn next(&mut self) -> Option<Temporary<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| {
let node = node.root();
node.r().is_element() && matches(selectors, &node.r(), &mut None)
})
}
}
pub trait NodeHelpers {
fn ancestors(self) -> AncestorIterator;
fn inclusive_ancestors(self) -> AncestorIterator;
fn children(self) -> NodeSiblingIterator;
fn rev_children(self) -> ReverseSiblingIterator;
fn child_elements(self) -> ChildElementIterator;
fn following_siblings(self) -> NodeSiblingIterator;
fn preceding_siblings(self) -> ReverseSiblingIterator;
fn is_in_doc(self) -> bool;
fn is_inclusive_ancestor_of(self, parent: JSRef<Node>) -> bool;
fn is_parent_of(self, child: JSRef<Node>) -> bool;
fn type_id(self) -> NodeTypeId;
fn len(self) -> u32;
fn index(self) -> u32;
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_focus_state(self) -> bool;
fn set_focus_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: u32);
fn debug_str(self) -> String;
fn traverse_preorder(self) -> TreeIterator;
fn inclusively_following_siblings(self) -> NodeSiblingIterator;
fn inclusively_preceding_siblings(self) -> ReverseSiblingIterator;
fn to_trusted_node_address(self) -> TrustedNodeAddress;
fn get_bounding_content_box(self) -> Rect<Au>;
fn get_content_boxes(self) -> Vec<Rect<Au>>;
fn before(self, nodes: Vec<NodeOrString>) -> ErrorResult;
fn after(self, nodes: Vec<NodeOrString>) -> ErrorResult;
fn replace_with(self, nodes: Vec<NodeOrString>) -> ErrorResult;
fn prepend(self, nodes: Vec<NodeOrString>) -> ErrorResult;
fn append(self, nodes: Vec<NodeOrString>) -> ErrorResult;
fn query_selector(self, selectors: DOMString) -> Fallible<Option<Temporary<Element>>>;
#[allow(unsafe_code)]
unsafe fn query_selector_iter(self, selectors: DOMString) -> Fallible<QuerySelectorIterator>;
fn query_selector_all(self, selectors: DOMString) -> Fallible<Temporary<NodeList>>;
fn remove_self(self);
fn get_unique_id(self) -> String;
fn summarize(self) -> NodeInfo;
fn teardown(self);
fn parse_fragment(self, markup: DOMString) -> Fallible<Temporary<DocumentFragment>>;
}
impl<'a> NodeHelpers for JSRef<'a, Node> {
fn teardown(self) {
self.layout_data.dispose();
for kid in self.children() {
let kid = kid.root();
kid.r().teardown();
}
}
/// 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: u32) {
let mut s = String::new();
for _ in 0..indent {
s.push_str(" ");
}
s.push_str(&*self.debug_str());
debug!("{:?}", s);
// FIXME: this should have a pure version?
for kid in self.children() {
let kid = kid.root();
kid.r().dump_indent(indent + 1)
}
}
/// 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
}
// https://dom.spec.whatwg.org/#concept-node-length
fn len(self) -> u32 {
match self.type_id {
NodeTypeId::DocumentType => 0,
NodeTypeId::CharacterData(_) => {
CharacterDataCast::to_ref(self).unwrap().Length()
},
_ => self.children().count() as u32
}
}
// https://dom.spec.whatwg.org/#concept-tree-index
fn index(self) -> u32 {
self.preceding_siblings().count() as u32
}
#[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::CharacterData(CharacterDataTypeId::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);
self.dirty(NodeDamage::NodeStyleDamaged);
}
fn get_focus_state(self) -> bool {
self.get_flag(IN_FOCUS_STATE)
}
fn set_focus_state(self, state: bool) {
self.set_flag(IN_FOCUS_STATE, state);
self.dirty(NodeDamage::NodeStyleDamaged);
}
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() {
let kid = kid.root();
dirty_subtree(kid.r());
}
}
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.
if !self.get_has_dirty_siblings() {
let parent =
match self.parent_node.get() {
None => return,
Some(parent) => parent,
}.root();
for sibling in parent.r().children() {
let sibling = sibling.root();
sibling.r().set_has_dirty_siblings(true);
}
}
// 4. Dirty ancestors.
for ancestor in self.ancestors() {
let ancestor = ancestor.root();
if !force_ancestors && ancestor.r().get_has_dirty_descendants() { break }
ancestor.r().set_has_dirty_descendants(true);
}
}
/// Iterates over this node and all its descendants, in preorder.
fn traverse_preorder(self) -> TreeIterator {
TreeIterator::new(self)
}
fn inclusively_following_siblings(self) -> NodeSiblingIterator {
NodeSiblingIterator {
current: Some(Temporary::from_rooted(self)),
}
}
fn inclusively_preceding_siblings(self) -> ReverseSiblingIterator {
ReverseSiblingIterator {
current: Some(Temporary::from_rooted(self)),
}
}
fn is_inclusive_ancestor_of(self, parent: JSRef<Node>) -> bool {
self == parent || parent.ancestors().any(|ancestor| ancestor.root().r() == self)
}
fn following_siblings(self) -> NodeSiblingIterator {
NodeSiblingIterator {
current: self.GetNextSibling(),
}
}
fn preceding_siblings(self) -> ReverseSiblingIterator {
ReverseSiblingIterator {
current: self.GetPreviousSibling(),
}
}
fn is_parent_of(self, child: JSRef<Node>) -> bool {
match child.parent_node.get().root() {
Some(ref parent) => parent.r() == self,
None => 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().content_box_query(self.to_trusted_node_address())
}
fn get_content_boxes(self) -> Vec<Rect<Au>> {
window_from_node(self).root().r().content_boxes_query(self.to_trusted_node_address())
}
// https://dom.spec.whatwg.org/#dom-childnode-before
fn before(self, nodes: Vec<NodeOrString>) -> ErrorResult {
match self.parent_node.get().root() {
None => {
// Step 1.
Ok(())
},
Some(ref parent_node) => {
// Step 2.
let doc = self.owner_doc().root();
let node = try!(doc.r().node_from_nodes_and_strings(nodes)).root();
// Step 3.
Node::pre_insert(node.r(), parent_node.r(),
Some(self)).map(|_| ())
},
}
}
// https://dom.spec.whatwg.org/#dom-childnode-after
fn after(self, nodes: Vec<NodeOrString>) -> ErrorResult {
match self.parent_node.get().root() {
None => {
// Step 1.
Ok(())
},
Some(ref parent_node) => {
// Step 2.
let doc = self.owner_doc().root();
let node = try!(doc.r().node_from_nodes_and_strings(nodes)).root();
// Step 3.
// FIXME(https://github.com/servo/servo/issues/5720)
let next_sibling = self.next_sibling.get().root();
Node::pre_insert(node.r(), parent_node.r(),
next_sibling.r()).map(|_| ())
},
}
}
// https://dom.spec.whatwg.org/#dom-childnode-replacewith
fn replace_with(self, nodes: Vec<NodeOrString>) -> ErrorResult {
match self.parent_node.get().root() {
None => {
// Step 1.
Ok(())
},
Some(ref parent_node) => {
// Step 2.
let doc = self.owner_doc().root();
let node = try!(doc.r().node_from_nodes_and_strings(nodes)).root();
// Step 3.
parent_node.r().ReplaceChild(node.r(), self).map(|_| ())
},
}
}
// https://dom.spec.whatwg.org/#dom-parentnode-prepend
fn prepend(self, nodes: Vec<NodeOrString>) -> ErrorResult {
// Step 1.
let doc = self.owner_doc().root();
let node = try!(doc.r().node_from_nodes_and_strings(nodes)).root();
// Step 2.
let first_child = self.first_child.get().root();
Node::pre_insert(node.r(), self, first_child.r()).map(|_| ())
}
// https://dom.spec.whatwg.org/#dom-parentnode-append
fn append(self, nodes: Vec<NodeOrString>) -> ErrorResult {
// Step 1.
let doc = self.owner_doc().root();
let node = try!(doc.r().node_from_nodes_and_strings(nodes)).root();
// Step 2.
self.AppendChild(node.r()).map(|_| ())
}
// https://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) {
// Step 2.
Err(()) => return Err(Syntax),
// Step 3.
Ok(ref selectors) => {
let root = self.ancestors().last().root();
let root = root.r().unwrap_or(self.clone());
Ok(root.traverse_preorder().filter_map(ElementCast::to_temporary).find(|element| {
matches(selectors, &NodeCast::from_ref(element.root().r()), &mut None)
}))
}
}
}
/// 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
#[allow(unsafe_code)]
unsafe fn query_selector_iter(self, selectors: DOMString)
-> Fallible<QuerySelectorIterator> {
// Step 1.
match parse_author_origin_selector_list_from_str(&selectors) {
// Step 2.
Err(()) => Err(Syntax),
// Step 3.
Ok(selectors) => {
let root = self.ancestors().last().root();
let root = root.r().unwrap_or(self);
Ok(QuerySelectorIterator::new(root.traverse_preorder(), selectors))
}
}
}
// https://dom.spec.whatwg.org/#dom-parentnode-queryselectorall
#[allow(unsafe_code)]
fn query_selector_all(self, selectors: DOMString) -> Fallible<Temporary<NodeList>> {
let mut nodes = RootedVec::new();
for node in try!(unsafe { self.query_selector_iter(selectors) }) {
nodes.push(JS::from_rooted(node));
}
let window = window_from_node(self).root();
Ok(NodeList::new_simple_list(window.r(), &nodes))
}
fn ancestors(self) -> AncestorIterator {
AncestorIterator {
current: self.GetParentNode()
}
}
fn inclusive_ancestors(self) -> AncestorIterator {
AncestorIterator {
current: Some(Temporary::from_rooted(self))
}
}
fn owner_doc(self) -> Temporary<Document> {
Temporary::from_rooted(self.owner_doc.get().unwrap())
}
fn set_owner_doc(self, document: JSRef<Document>) {
self.owner_doc.set(Some(JS::from_rooted(document)));
}
fn is_in_html_doc(self) -> bool {
self.owner_doc().root().r().is_html_document()
}
fn children(self) -> NodeSiblingIterator {
NodeSiblingIterator {
current: self.GetFirstChild(),
}
}
fn rev_children(self) -> ReverseSiblingIterator {
ReverseSiblingIterator {
current: self.GetLastChild(),
}
}
fn child_elements(self) -> ChildElementIterator {
fn to_temporary(node: Temporary<Node>) -> Option<Temporary<Element>> {
ElementCast::to_temporary(node)
}
self.children()
.filter_map(to_temporary as fn(_) -> _)
.peekable()
}
fn remove_self(self) {
match self.parent_node.get().root() {
Some(ref parent) => parent.r().remove_child(self),
None => ()
}
}
fn get_unique_id(self) -> String {
// FIXME(https://github.com/rust-lang/rust/issues/23338)
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();
}
let id = self.unique_id.borrow();
id.clone()
}
fn summarize(self) -> NodeInfo {
NodeInfo {
uniqueId: self.get_unique_id(),
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(),
namespaceURI: "".to_owned(), //FIXME
nodeName: self.NodeName(),
numChildren: self.ChildNodes().root().r().Length() as usize,
//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
}
}
// https://dvcs.w3.org/hg/innerhtml/raw-file/tip/index.html#dfn-concept-parse-fragment
fn parse_fragment(self, markup: DOMString) -> Fallible<Temporary<DocumentFragment>> {
let context_node: JSRef<Node> = NodeCast::from_ref(self);
let context_document = document_from_node(self).root();
let mut new_children: RootedVec<JS<Node>> = RootedVec::new();
if context_document.r().is_html_document() {
parse_html_fragment(context_node, markup, &mut new_children);
} else {
// FIXME: XML case
unimplemented!();
}
let fragment = DocumentFragment::new(context_document.r()).root();
let fragment_node: JSRef<Node> = NodeCast::from_ref(fragment.r());
for node in new_children.iter() {
fragment_node.AppendChild(node.root().r()).unwrap();
}
Ok(Temporary::from_rooted(fragment.r()))
}
}
/// If the given untrusted node address represents a valid DOM node in the given runtime,
/// returns it.
#[allow(unsafe_code)]
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::native_from_reflector(object);
Temporary::from_unrooted(Unrooted::from_raw(boxed_node))
}
}
pub trait LayoutNodeHelpers {
#[allow(unsafe_code)]
unsafe fn type_id_for_layout(&self) -> NodeTypeId;
#[allow(unsafe_code)]
unsafe fn parent_node_ref(&self) -> Option<LayoutJS<Node>>;
#[allow(unsafe_code)]
unsafe fn first_child_ref(&self) -> Option<LayoutJS<Node>>;
#[allow(unsafe_code)]
unsafe fn last_child_ref(&self) -> Option<LayoutJS<Node>>;
#[allow(unsafe_code)]
unsafe fn prev_sibling_ref(&self) -> Option<LayoutJS<Node>>;
#[allow(unsafe_code)]
unsafe fn next_sibling_ref(&self) -> Option<LayoutJS<Node>>;
#[allow(unsafe_code)]
unsafe fn owner_doc_for_layout(&self) -> LayoutJS<Document>;
#[allow(unsafe_code)]
unsafe fn is_element_for_layout(&self) -> bool;
#[allow(unsafe_code)]
unsafe fn get_flag(self, flag: NodeFlags) -> bool;
#[allow(unsafe_code)]
unsafe fn set_flag(self, flag: NodeFlags, value: bool);
}
impl LayoutNodeHelpers for LayoutJS<Node> {
#[inline]
#[allow(unsafe_code)]
unsafe fn type_id_for_layout(&self) -> NodeTypeId {
(*self.unsafe_get()).type_id
}
#[inline]
#[allow(unsafe_code)]
unsafe fn is_element_for_layout(&self) -> bool {
(*self.unsafe_get()).is_element()
}
#[inline]
#[allow(unsafe_code)]
unsafe fn parent_node_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).parent_node.get_inner_as_layout()
}
#[inline]
#[allow(unsafe_code)]
unsafe fn first_child_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).first_child.get_inner_as_layout()
}
#[inline]
#[allow(unsafe_code)]
unsafe fn last_child_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).last_child.get_inner_as_layout()
}
#[inline]
#[allow(unsafe_code)]
unsafe fn prev_sibling_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).prev_sibling.get_inner_as_layout()
}
#[inline]
#[allow(unsafe_code)]
unsafe fn next_sibling_ref(&self) -> Option<LayoutJS<Node>> {
(*self.unsafe_get()).next_sibling.get_inner_as_layout()
}
#[inline]
#[allow(unsafe_code)]
unsafe fn owner_doc_for_layout(&self) -> LayoutJS<Document> {
(*self.unsafe_get()).owner_doc.get_inner_as_layout().unwrap()
}
#[inline]
#[allow(unsafe_code)]
unsafe fn get_flag(self, flag: NodeFlags) -> bool {
(*self.unsafe_get()).flags.get().contains(flag)
}
#[inline]
#[allow(unsafe_code)]
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 {
#[allow(unsafe_code)]
unsafe fn get_hover_state_for_layout(&self) -> bool;
#[allow(unsafe_code)]
unsafe fn get_focus_state_for_layout(&self) -> bool;
#[allow(unsafe_code)]
unsafe fn get_disabled_state_for_layout(&self) -> bool;
#[allow(unsafe_code)]
unsafe fn get_enabled_state_for_layout(&self) -> bool;
fn type_id_for_layout(&self) -> NodeTypeId;
}
impl RawLayoutNodeHelpers for Node {
#[inline]
#[allow(unsafe_code)]
unsafe fn get_hover_state_for_layout(&self) -> bool {
self.flags.get().contains(IN_HOVER_STATE)
}
#[inline]
#[allow(unsafe_code)]
unsafe fn get_focus_state_for_layout(&self) -> bool {
self.flags.get().contains(IN_FOCUS_STATE)
}
#[inline]
#[allow(unsafe_code)]
unsafe fn get_disabled_state_for_layout(&self) -> bool {
self.flags.get().contains(IN_DISABLED_STATE)
}
#[inline]
#[allow(unsafe_code)]
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 =
Peekable<FilterMap<NodeSiblingIterator,
fn(Temporary<Node>) -> Option<Temporary<Element>>>>;
pub struct NodeSiblingIterator {
current: Option<Temporary<Node>>,
}
impl Iterator for NodeSiblingIterator {
type Item = Temporary<Node>;
fn next(&mut self) -> Option<Temporary<Node>> {
let current = match self.current.take() {
None => return None,
Some(current) => current,
}.root();
self.current = current.r().GetNextSibling();
Some(Temporary::from_rooted(current.r()))
}
}
pub struct ReverseSiblingIterator {
current: Option<Temporary<Node>>,
}
impl Iterator for ReverseSiblingIterator {
type Item = Temporary<Node>;
fn next(&mut self) -> Option<Temporary<Node>> {
let current = match self.current.take() {
None => return None,
Some(current) => current,
}.root();
self.current = current.r().GetPreviousSibling();
Some(Temporary::from_rooted(current.r()))
}
}
pub struct AncestorIterator {
current: Option<Temporary<Node>>,
}
impl Iterator for AncestorIterator {
type Item = Temporary<Node>;
fn next(&mut self) -> Option<Temporary<Node>> {
let current = match self.current.take() {
None => return None,
Some(current) => current,
}.root();
self.current = current.r().GetParentNode();
Some(Temporary::from_rooted(current.r()))
}
}
pub struct TreeIterator {
current: Option<Temporary<Node>>,
depth: usize,
}
impl<'a> TreeIterator {
fn new(root: JSRef<'a, Node>) -> TreeIterator {
TreeIterator {
current: Some(Temporary::from_rooted(root)),
depth: 0,
}
}
}
impl Iterator for TreeIterator {
type Item = Temporary<Node>;
// https://dom.spec.whatwg.org/#concept-tree-order
fn next(&mut self) -> Option<Temporary<Node>> {
let current = match self.current.take() {
None => return None,
Some(current) => current,
};
let node = current.root();
if let Some(first_child) = node.r().GetFirstChild() {
self.current = Some(first_child);
self.depth += 1;
return Some(current);
};
for ancestor in node.r().inclusive_ancestors() {
if self.depth == 0 {
break;
}
if let Some(next_sibling) = ancestor.root().r().GetNextSibling() {
self.current = Some(next_sibling);
return Some(current);
}
self.depth -= 1;
}
debug_assert!(self.depth == 0);
self.current = None;
Some(current)
}
}
/// Specifies whether children must be recursively cloned or not.
#[derive(Copy, Clone, 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: MutNullableHeap::new(doc.map(JS::from_rooted)),
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]
#[allow(unsafe_code)]
pub unsafe fn layout_data_unchecked(&self) -> *const Option<LayoutData> {
self.layout_data.borrow_unchecked()
}
// https://dom.spec.whatwg.org/#concept-node-adopt
pub fn adopt(node: JSRef<Node>, document: JSRef<Document>) {
// Step 1.
match node.parent_node.get().root() {
Some(ref 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.root().r().set_owner_doc(document);
}
}
// Step 3.
// If node is an element, it is _affected by a base URL change_.
}
// https://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.
if let Some(child) = child {
if !parent.is_parent_of(child) {
return Err(NotFound);
}
}
// Step 4-5.
match node.type_id() {
NodeTypeId::CharacterData(CharacterDataTypeId::Text) => {
if parent.is_document() {
return Err(HierarchyRequest);
}
},
NodeTypeId::DocumentType => {
if !parent.is_document() {
return Err(HierarchyRequest);
}
},
NodeTypeId::DocumentFragment |
NodeTypeId::Element(_) |
NodeTypeId::CharacterData(CharacterDataTypeId::ProcessingInstruction) |
NodeTypeId::CharacterData(CharacterDataTypeId::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()
.map(|c| c.root())
.any(|c| c.r().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);
}
if let Some(child) = child {
if child.inclusively_following_siblings()
.map(|c| c.root())
.any(|child| child.r().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);
}
if let Some(ref child) = child {
if child.inclusively_following_siblings()
.map(|c| c.root())
.any(|child| child.r().is_doctype()) {
return Err(HierarchyRequest);
}
}
},
// Step 6.3
NodeTypeId::DocumentType => {
if parent.children()
.map(|c| c.root())
.any(|c| c.r().is_doctype())
{
return Err(HierarchyRequest);
}
match child {
Some(child) => {
if parent.children()
.map(|c| c.root())
.take_while(|c| c.r() != child)
.any(|c| c.r().is_element())
{
return Err(HierarchyRequest);
}
},
None => {
if !parent.child_elements().is_empty() {
return Err(HierarchyRequest);
}
},
}
},
NodeTypeId::CharacterData(_) => (),
NodeTypeId::Document => unreachable!(),
}
},
_ => (),
}
// Step 7-8.
let reference_child = match child {
Some(child) if child == node => node.GetNextSibling(),
_ => None
}.root();
let reference_child = reference_child.r().or(child);
// Step 9.
let document = document_from_node(parent).root();
Node::adopt(node, document.r());
// Step 10.
Node::insert(node, parent, reference_child, SuppressObserver::Unsuppressed);
// Step 11.
return Ok(Temporary::from_rooted(node))
}
// https://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 kid = kid.root();
let mut flags = kid.r().flags.get();
if is_in_doc {
flags.insert(IS_IN_DOC);
} else {
flags.remove(IS_IN_DOC);
}
kid.r().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() {
let kid = kid.root();
kids.push(Temporary::from_rooted(kid.r()));
Node::remove(kid.r(), node, SuppressObserver::Suppressed);
}
// Step 7: mutation records.
// Step 8.
for kid in kids.clone().into_iter() {
let kid = kid.root();
do_insert(kid.r(), parent, child);
}
for kid in kids.into_iter() {
let kid = kid.root();
fire_observer_if_necessary(kid.r(), 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);
}
}
}
// https://dom.spec.whatwg.org/#concept-node-replace-all
pub 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 mut removed_nodes: RootedVec<JS<Node>> = RootedVec::new();
for child in parent.children() {
removed_nodes.push(JS::from_rooted(child));
}
// Step 3.
let added_nodes = match node {
None => vec!(),
Some(node) => match node.type_id() {
NodeTypeId::DocumentFragment => node.children().collect(),
_ => vec!(Temporary::from_rooted(node)),
},
};
// Step 4.
for child in parent.children() {
let child = child.root();
Node::remove(child.r(), 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() {
let removed_node = removed_node.root();
removed_node.r().node_removed(parent_in_doc);
}
for added_node in added_nodes {
let added_node = added_node.root();
added_node.r().node_inserted();
}
}
// https://dom.spec.whatwg.org/#concept-node-pre-remove
fn pre_remove(child: JSRef<Node>, parent: JSRef<Node>) -> Fallible<Temporary<Node>> {
// Step 1.
match child.GetParentNode() {
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))
}
// https://dom.spec.whatwg.org/#concept-node-remove
fn remove(node: JSRef<Node>, parent: JSRef<Node>, suppress_observers: SuppressObserver) {
assert!(node.GetParentNode().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()),
}
}
// https://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::CharacterData(CharacterDataTypeId::Comment) => {
let cdata = CharacterDataCast::to_ref(node).unwrap();
let comment = Comment::new(cdata.Data(), 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 loader = DocumentLoader::new(&*document.loader());
let document = Document::new(window.r(), Some(document.url()),
is_html_doc, None,
None, DocumentSource::NotFromParser, loader);
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| Atom::from_slice(&p)),
document.r(), ElementCreator::ScriptCreated);
NodeCast::from_temporary(element)
},
NodeTypeId::CharacterData(CharacterDataTypeId::Text) => {
let cdata = CharacterDataCast::to_ref(node).unwrap();
let text = Text::new(cdata.Data(), document.r());
NodeCast::from_temporary(text)
},
NodeTypeId::CharacterData(CharacterDataTypeId::ProcessingInstruction) => {
let pi: JSRef<ProcessingInstruction> = ProcessingInstructionCast::to_ref(node).unwrap();
let pi = ProcessingInstruction::new(pi.Target(),
CharacterDataCast::from_ref(pi).Data(), 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 ref 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 = child.root();
let child_copy = Node::clone(child.r(), Some(document),
clone_children).root();
let _inserted_node = Node::pre_insert(child_copy.r(), copy.r(), None);
}
}
// Step 7.
Temporary::from_rooted(copy.r())
}
pub fn collect_text_contents<T: Iterator<Item=Temporary<Node>>>(iterator: T) -> String {
let mut content = String::new();
for node in iterator {
let node = node.root();
let text = TextCast::to_ref(node.r());
match text {
Some(text) => content.push_str(&CharacterDataCast::from_ref(text).Data()),
None => (),
}
}
content
}
}
impl<'a> NodeMethods for JSRef<'a, Node> {
// https://dom.spec.whatwg.org/#dom-node-nodetype
fn NodeType(self) -> u16 {
match self.type_id {
NodeTypeId::CharacterData(CharacterDataTypeId::Text) => NodeConstants::TEXT_NODE,
NodeTypeId::CharacterData(CharacterDataTypeId::ProcessingInstruction) => NodeConstants::PROCESSING_INSTRUCTION_NODE,
NodeTypeId::CharacterData(CharacterDataTypeId::Comment) => NodeConstants::COMMENT_NODE,
NodeTypeId::Document => NodeConstants::DOCUMENT_NODE,
NodeTypeId::DocumentType => NodeConstants::DOCUMENT_TYPE_NODE,
NodeTypeId::DocumentFragment => NodeConstants::DOCUMENT_FRAGMENT_NODE,
NodeTypeId::Element(_) => NodeConstants::ELEMENT_NODE,
}
}
// https://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::CharacterData(CharacterDataTypeId::Text) => "#text".to_owned(),
NodeTypeId::CharacterData(CharacterDataTypeId::ProcessingInstruction) => {
let processing_instruction: JSRef<ProcessingInstruction> =
ProcessingInstructionCast::to_ref(self).unwrap();
processing_instruction.Target()
}
NodeTypeId::CharacterData(CharacterDataTypeId::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()
}
}
// https://dom.spec.whatwg.org/#dom-node-baseuri
fn GetBaseURI(self) -> Option<DOMString> {
// FIXME (#1824) implement.
None
}
// https://dom.spec.whatwg.org/#dom-node-ownerdocument
fn GetOwnerDocument(self) -> Option<Temporary<Document>> {
match self.type_id {
NodeTypeId::CharacterData(..) |
NodeTypeId::Element(..) |
NodeTypeId::DocumentType |
NodeTypeId::DocumentFragment => Some(self.owner_doc()),
NodeTypeId::Document => None
}
}
// https://dom.spec.whatwg.org/#dom-node-parentnode
fn GetParentNode(self) -> Option<Temporary<Node>> {
self.parent_node.get().map(Temporary::from_rooted)
}
// https://dom.spec.whatwg.org/#dom-node-parentelement
fn GetParentElement(self) -> Option<Temporary<Element>> {
self.GetParentNode().and_then(ElementCast::to_temporary)
}
// https://dom.spec.whatwg.org/#dom-node-haschildnodes
fn HasChildNodes(self) -> bool {
self.first_child.get().is_some()
}
// https://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)
})
}
// https://dom.spec.whatwg.org/#dom-node-firstchild
fn GetFirstChild(self) -> Option<Temporary<Node>> {
self.first_child.get().map(Temporary::from_rooted)
}
// https://dom.spec.whatwg.org/#dom-node-lastchild
fn GetLastChild(self) -> Option<Temporary<Node>> {
self.last_child.get().map(Temporary::from_rooted)
}
// https://dom.spec.whatwg.org/#dom-node-previoussibling
fn GetPreviousSibling(self) -> Option<Temporary<Node>> {
self.prev_sibling.get().map(Temporary::from_rooted)
}
// https://dom.spec.whatwg.org/#dom-node-nextsibling
fn GetNextSibling(self) -> Option<Temporary<Node>> {
self.next_sibling.get().map(Temporary::from_rooted)
}
// https://dom.spec.whatwg.org/#dom-node-nodevalue
fn GetNodeValue(self) -> Option<DOMString> {
match self.type_id {
NodeTypeId::CharacterData(..) => {
let chardata: JSRef<CharacterData> = CharacterDataCast::to_ref(self).unwrap();
Some(chardata.Data())
}
_ => {
None
}
}
}
// https://dom.spec.whatwg.org/#dom-node-nodevalue
fn SetNodeValue(self, val: Option<DOMString>) {
match self.type_id {
NodeTypeId::CharacterData(..) => {
self.SetTextContent(val)
}
_ => {}
}
}
// https://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::CharacterData(..) => {
let characterdata: JSRef<CharacterData> = CharacterDataCast::to_ref(self).unwrap();
Some(characterdata.Data())
}
NodeTypeId::DocumentType |
NodeTypeId::Document => {
None
}
}
}
// https://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::CharacterData(..) => {
let characterdata: JSRef<CharacterData> = CharacterDataCast::to_ref(self).unwrap();
characterdata.SetData(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 => {}
}
}
// https://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)
}
// https://dom.spec.whatwg.org/#dom-node-appendchild
fn AppendChild(self, node: JSRef<Node>) -> Fallible<Temporary<Node>> {
Node::pre_insert(node, self, None)
}
// https://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::CharacterData(CharacterDataTypeId::Text) if self.is_document() => return Err(HierarchyRequest),
NodeTypeId::DocumentType if !self.is_document() => return Err(HierarchyRequest),
NodeTypeId::DocumentFragment |
NodeTypeId::DocumentType |
NodeTypeId::Element(..) |
NodeTypeId::CharacterData(..) => (),
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()
.map(|c| c.root())
.any(|c| c.r().is_text())
{
return Err(HierarchyRequest);
}
match node.child_elements().count() {
0 => (),
// Step 6.1.2
1 => {
if self.child_elements()
.map(|c| c.root())
.any(|c| NodeCast::from_ref(c.r()) != child) {
return Err(HierarchyRequest);
}
if child.following_siblings()
.map(|c| c.root())
.any(|child| child.r().is_doctype()) {
return Err(HierarchyRequest);
}
},
// Step 6.1.1(a)
_ => return Err(HierarchyRequest)
}
},
// Step 6.2
NodeTypeId::Element(..) => {
if self.child_elements()
.map(|c| c.root())
.any(|c| NodeCast::from_ref(c.r()) != child) {
return Err(HierarchyRequest);
}
if child.following_siblings()
.map(|c| c.root())
.any(|child| child.r().is_doctype())
{
return Err(HierarchyRequest);
}
},
// Step 6.3
NodeTypeId::DocumentType => {
if self.children()
.map(|c| c.root())
.any(|c| c.r().is_doctype() && c.r() != child)
{
return Err(HierarchyRequest);
}
if self.children()
.map(|c| c.root())
.take_while(|c| c.r() != child)
.any(|c| c.r().is_element())
{
return Err(HierarchyRequest);
}
},
NodeTypeId::CharacterData(..) => (),
NodeTypeId::Document => unreachable!()
}
},
_ => ()
}
// Ok if not caught by previous error checks.
if node == child {
return Ok(Temporary::from_rooted(child));
}
// Step 7-8.
let child_next_sibling = child.next_sibling.get().root();
let node_next_sibling = node.next_sibling.get().root();
let reference_child = if child_next_sibling.r() == Some(node) {
node_next_sibling.r()
} else {
child_next_sibling.r()
};
// Step 9.
let document = document_from_node(self).root();
Node::adopt(node, document.r());
// Step 12.
let mut nodes: RootedVec<JS<Node>> = RootedVec::new();
if node.type_id() == NodeTypeId::DocumentFragment {
// Collect fragment children before Step 11,
// because Node::insert removes a DocumentFragment's children,
// and we need them in Step 13.
// Issue filed against the spec:
// https://www.w3.org/Bugs/Public/show_bug.cgi?id=28330
for child_node in node.children() {
let child_node = child_node.root();
nodes.push(JS::from_rooted(child_node.r()));
}
} else {
nodes.push(JS::from_rooted(node));
}
{
// Step 10.
Node::remove(child, self, SuppressObserver::Suppressed);
// Step 11.
Node::insert(node, self, reference_child, SuppressObserver::Suppressed);
}
// Step 13: mutation records.
child.node_removed(self.is_in_doc());
for child_node in &*nodes {
let child_node = child_node.root();
child_node.r().node_inserted();
}
// Step 14.
Ok(Temporary::from_rooted(child))
}
// https://dom.spec.whatwg.org/#dom-node-removechild
fn RemoveChild(self, node: JSRef<Node>)
-> Fallible<Temporary<Node>> {
Node::pre_remove(node, self)
}
// https://dom.spec.whatwg.org/#dom-node-normalize
fn Normalize(self) {
let mut prev_text: Option<Temporary<Text>> = None;
for child in self.children() {
let child = child.root();
match TextCast::to_ref(child.r()) {
Some(text) => {
let characterdata: JSRef<CharacterData> = CharacterDataCast::from_ref(text);
if characterdata.Length() == 0 {
self.remove_child(child.r());
} else {
match prev_text {
Some(ref text_node) => {
let text_node = text_node.clone().root();
let prev_characterdata: JSRef<CharacterData> = CharacterDataCast::from_ref(text_node.r());
let _ = prev_characterdata.AppendData(characterdata.Data());
self.remove_child(child.r());
},
None => prev_text = Some(Temporary::from_rooted(text))
}
}
},
None => {
child.r().Normalize();
prev_text = None;
}
}
}
}
// https://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
})
}
// https://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()) &&
(*CharacterDataCast::from_ref(pi).data() == *CharacterDataCast::from_ref(other_pi).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();
// FIXME(https://github.com/rust-lang/rust/issues/23338)
let own_data = characterdata.data();
let other_data = other_characterdata.data();
*own_data == *other_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());
// FIXME(https://github.com/rust-lang/rust/issues/23338)
let attrs = element.attrs();
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() == **other_attr.r().value())
})
})
}
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::CharacterData(CharacterDataTypeId::ProcessingInstruction)
if !is_equal_processinginstruction(this, node) => return false,
NodeTypeId::CharacterData(CharacterDataTypeId::Text) |
NodeTypeId::CharacterData(CharacterDataTypeId::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(|(child, other_child)| {
is_equal_node(child.root().r(), other_child.root().r())
})
}
match maybe_node {
// Step 1.
None => false,
// Step 2-6.
Some(node) => is_equal_node(self, node)
}
}
// https://dom.spec.whatwg.org/#dom-node-comparedocumentposition
fn CompareDocumentPosition(self, other: JSRef<Node>) -> u16 {
if self == other {
// step 2.
0
} else {
let mut lastself = Temporary::from_rooted(self.clone());
let mut lastother = Temporary::from_rooted(other.clone());
for ancestor in self.ancestors() {
let ancestor = ancestor.root();
if ancestor.r() == other {
// step 4.
return NodeConstants::DOCUMENT_POSITION_CONTAINS +
NodeConstants::DOCUMENT_POSITION_PRECEDING;
}
lastself = Temporary::from_rooted(ancestor.r());
}
for ancestor in other.ancestors() {
let ancestor = ancestor.root();
if ancestor.r() == self {
// step 5.
return NodeConstants::DOCUMENT_POSITION_CONTAINED_BY +
NodeConstants::DOCUMENT_POSITION_FOLLOWING;
}
lastother = Temporary::from_rooted(ancestor.r());
}
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;
}
let lastself = lastself.root();
for child in lastself.r().traverse_preorder() {
let child = child.root();
if child.r() == other {
// step 6.
return NodeConstants::DOCUMENT_POSITION_PRECEDING;
}
if child.r() == self {
// step 7.
return NodeConstants::DOCUMENT_POSITION_FOLLOWING;
}
}
unreachable!()
}
}
// https://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)
}
}
// https://dom.spec.whatwg.org/#dom-node-lookupprefix
fn LookupPrefix(self, namespace: Option<DOMString>) -> Option<DOMString> {
// Step 1.
if null_str_as_empty(&namespace).is_empty() {
return None;
}
// Step 2.
match self.type_id() {
NodeTypeId::Element(..) => ElementCast::to_ref(self).unwrap().lookup_prefix(namespace),
NodeTypeId::Document => {
DocumentCast::to_ref(self).unwrap().GetDocumentElement().and_then(|element| {
element.root().r().lookup_prefix(namespace)
})
},
NodeTypeId::DocumentType | NodeTypeId::DocumentFragment => None,
_ => {
self.GetParentElement().and_then(|element| {
element.root().r().lookup_prefix(namespace)
})
}
}
}
// https://dom.spec.whatwg.org/#dom-node-lookupnamespaceuri
fn LookupNamespaceURI(self, _namespace: Option<DOMString>) -> Option<DOMString> {
// FIXME (#1826) implement.
None
}
// https://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);
#[allow(unsafe_code)]
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> for JSRef<'a, Node> {
type Element = JSRef<'a, Element>;
fn parent_node(self) -> Option<JSRef<'a, Node>> {
(*self).parent_node.get()
.map(|node| node.root().get_unsound_ref_forever())
}
fn first_child(self) -> Option<JSRef<'a, Node>> {
(*self).first_child.get()
.map(|node| node.root().get_unsound_ref_forever())
}
fn last_child(self) -> Option<JSRef<'a, Node>> {
(*self).last_child.get()
.map(|node| node.root().get_unsound_ref_forever())
}
fn prev_sibling(self) -> Option<JSRef<'a, Node>> {
(*self).prev_sibling.get()
.map(|node| node.root().get_unsound_ref_forever())
}
fn next_sibling(self) -> Option<JSRef<'a, Node>> {
(*self).next_sibling.get()
.map(|node| node.root().get_unsound_ref_forever())
}
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>(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>(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 local_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, local_name).root()
.map_or(false, |attr| {
// FIXME(https://github.com/rust-lang/rust/issues/23338)
let attr = attr.r();
let value = attr.value();
test(&value)
})
},
NamespaceConstraint::Any => {
let mut attributes: RootedVec<JS<Attr>> = RootedVec::new();
self.as_element().get_attributes(local_name, &mut attributes);
attributes.iter().map(|attr| attr.root()).any(|attr| {
// FIXME(https://github.com/rust-lang/rust/issues/23338)
let attr = attr.r();
let value = attr.value();
test(&value)
})
}
}
}
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() }
#[allow(unsafe_code)]
unsafe fn set_changed(self, value: bool) { self.set_has_changed(value) }
fn is_dirty(self) -> bool { self.get_is_dirty() }
#[allow(unsafe_code)]
unsafe fn set_dirty(self, value: bool) { self.set_is_dirty(value) }
fn has_dirty_siblings(self) -> bool { self.get_has_dirty_siblings() }
#[allow(unsafe_code)]
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() }
#[allow(unsafe_code)]
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() {
let ancestor = ancestor.root();
let ancestor = ancestor.r();
if !ancestor.is_htmlfieldsetelement() { continue; }
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()
.map(|child| child.root())
.find(|child| child.r().is_htmllegendelement())
{
Some(ref legend) => {
// XXXabinader: should we save previous ancestor to avoid this iteration?
if self.ancestors().any(|ancestor| ancestor.root().r() == legend.r()) { 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; }
if let Some(ref parent) = self.GetParentNode().root() {
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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