mirror of
https://github.com/servo/servo.git
synced 2025-06-10 09:33:13 +00:00
364235ac0c
Instead of applying animations and transitions to styled elements, include them in the cascade. This allows them to interact properly with things like font-size and !important rules.
1527 lines
47 KiB
Rust
1527 lines
47 KiB
Rust
/* 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 https://mozilla.org/MPL/2.0/. */
|
|
|
|
//! A safe wrapper for DOM nodes that prevents layout from mutating the DOM, from letting DOM nodes
|
|
//! escape, and from generally doing anything that it isn't supposed to. This is accomplished via
|
|
//! a simple whitelist of allowed operations, along with some lifetime magic to prevent nodes from
|
|
//! escaping.
|
|
//!
|
|
//! As a security wrapper is only as good as its whitelist, be careful when adding operations to
|
|
//! this list. The cardinal rules are:
|
|
//!
|
|
//! 1. Layout is not allowed to mutate the DOM.
|
|
//!
|
|
//! 2. Layout is not allowed to see anything with `LayoutDom` in the name, because it could hang
|
|
//! onto these objects and cause use-after-free.
|
|
//!
|
|
//! When implementing wrapper functions, be careful that you do not touch the borrow flags, or you
|
|
//! will race and cause spurious thread failure. (Note that I do not believe these races are
|
|
//! exploitable, but they'll result in brokenness nonetheless.)
|
|
//!
|
|
//! Rules of the road for this file:
|
|
//!
|
|
//! * Do not call any methods on DOM nodes without checking to see whether they use borrow flags.
|
|
//!
|
|
//! o Instead of `get_attr()`, use `.get_attr_val_for_layout()`.
|
|
//!
|
|
//! o Instead of `html_element_in_html_document()`, use
|
|
//! `html_element_in_html_document_for_layout()`.
|
|
|
|
#![allow(unsafe_code)]
|
|
|
|
use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
|
|
use gfx_traits::ByteIndex;
|
|
use html5ever::{LocalName, Namespace};
|
|
use layout::element_data::LayoutDataForElement;
|
|
use layout::wrapper::GetStyleAndLayoutData;
|
|
use msg::constellation_msg::{BrowsingContextId, PipelineId};
|
|
use net_traits::image::base::{Image, ImageMetadata};
|
|
use range::Range;
|
|
use script::layout_exports::NodeFlags;
|
|
use script::layout_exports::ShadowRoot;
|
|
use script::layout_exports::{
|
|
CharacterDataTypeId, DocumentFragmentTypeId, ElementTypeId, HTMLElementTypeId, NodeTypeId,
|
|
TextTypeId,
|
|
};
|
|
use script::layout_exports::{Document, Element, Node, Text};
|
|
use script::layout_exports::{LayoutCharacterDataHelpers, LayoutDocumentHelpers};
|
|
use script::layout_exports::{
|
|
LayoutDom, LayoutElementHelpers, LayoutNodeHelpers, LayoutShadowRootHelpers,
|
|
};
|
|
use script_layout_interface::wrapper_traits::{
|
|
DangerousThreadSafeLayoutNode, GetStyleAndOpaqueLayoutData, LayoutNode,
|
|
};
|
|
use script_layout_interface::wrapper_traits::{
|
|
PseudoElementType, ThreadSafeLayoutElement, ThreadSafeLayoutNode,
|
|
};
|
|
use script_layout_interface::{
|
|
HTMLCanvasData, HTMLMediaData, LayoutNodeType, StyleAndOpaqueLayoutData,
|
|
};
|
|
use script_layout_interface::{SVGSVGData, StyleData, TrustedNodeAddress};
|
|
use selectors::attr::{AttrSelectorOperation, CaseSensitivity, NamespaceConstraint};
|
|
use selectors::matching::VisitedHandlingMode;
|
|
use selectors::matching::{ElementSelectorFlags, MatchingContext, QuirksMode};
|
|
use selectors::sink::Push;
|
|
use servo_arc::{Arc, ArcBorrow};
|
|
use servo_atoms::Atom;
|
|
use servo_url::ServoUrl;
|
|
use std::borrow::Cow;
|
|
use std::fmt;
|
|
use std::fmt::Debug;
|
|
use std::hash::{Hash, Hasher};
|
|
use std::sync::atomic::Ordering;
|
|
use std::sync::Arc as StdArc;
|
|
use style::applicable_declarations::ApplicableDeclarationBlock;
|
|
use style::attr::AttrValue;
|
|
use style::context::SharedStyleContext;
|
|
use style::data::ElementData;
|
|
use style::dom::{DomChildren, LayoutIterator, NodeInfo, OpaqueNode};
|
|
use style::dom::{TDocument, TElement, TNode, TShadowRoot};
|
|
use style::element_state::*;
|
|
use style::font_metrics::ServoMetricsProvider;
|
|
use style::media_queries::Device;
|
|
use style::properties::{ComputedValues, PropertyDeclarationBlock};
|
|
use style::selector_parser::{extended_filtering, PseudoElement, SelectorImpl};
|
|
use style::selector_parser::{AttrValue as SelectorAttrValue, Lang, NonTSPseudoClass};
|
|
use style::shared_lock::{
|
|
Locked as StyleLocked, SharedRwLock as StyleSharedRwLock, SharedRwLockReadGuard,
|
|
};
|
|
use style::str::is_whitespace;
|
|
use style::stylist::CascadeData;
|
|
use style::CaseSensitivityExt;
|
|
|
|
#[derive(Clone, Copy)]
|
|
pub struct ServoLayoutNode<'dom> {
|
|
/// The wrapped node.
|
|
node: LayoutDom<'dom, Node>,
|
|
}
|
|
|
|
// Those are supposed to be sound, but they aren't because the entire system
|
|
// between script and layout so far has been designed to work around their
|
|
// absence. Switching the entire thing to the inert crate infra will help.
|
|
|
|
unsafe impl Send for ServoLayoutNode<'_> {}
|
|
unsafe impl Sync for ServoLayoutNode<'_> {}
|
|
|
|
impl<'ln> Debug for ServoLayoutNode<'ln> {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
if let Some(el) = self.as_element() {
|
|
el.fmt(f)
|
|
} else {
|
|
if self.is_text_node() {
|
|
write!(f, "<text node> ({:#x})", self.opaque().0)
|
|
} else {
|
|
write!(f, "<non-text node> ({:#x})", self.opaque().0)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> PartialEq for ServoLayoutNode<'a> {
|
|
#[inline]
|
|
fn eq(&self, other: &ServoLayoutNode) -> bool {
|
|
self.node == other.node
|
|
}
|
|
}
|
|
|
|
impl<'ln> ServoLayoutNode<'ln> {
|
|
fn from_layout_js(n: LayoutDom<'ln, Node>) -> Self {
|
|
ServoLayoutNode { node: n }
|
|
}
|
|
|
|
pub unsafe fn new(address: &TrustedNodeAddress) -> Self {
|
|
ServoLayoutNode::from_layout_js(LayoutDom::from_trusted_node_address(*address))
|
|
}
|
|
|
|
fn script_type_id(&self) -> NodeTypeId {
|
|
self.node.type_id_for_layout()
|
|
}
|
|
}
|
|
|
|
impl<'ln> NodeInfo for ServoLayoutNode<'ln> {
|
|
fn is_element(&self) -> bool {
|
|
self.node.is_element_for_layout()
|
|
}
|
|
|
|
fn is_text_node(&self) -> bool {
|
|
self.script_type_id() ==
|
|
NodeTypeId::CharacterData(CharacterDataTypeId::Text(TextTypeId::Text))
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy, PartialEq)]
|
|
pub struct ServoShadowRoot<'dom> {
|
|
/// The wrapped shadow root.
|
|
shadow_root: LayoutDom<'dom, ShadowRoot>,
|
|
}
|
|
|
|
impl<'lr> Debug for ServoShadowRoot<'lr> {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
self.as_node().fmt(f)
|
|
}
|
|
}
|
|
|
|
impl<'lr> TShadowRoot for ServoShadowRoot<'lr> {
|
|
type ConcreteNode = ServoLayoutNode<'lr>;
|
|
|
|
fn as_node(&self) -> Self::ConcreteNode {
|
|
ServoLayoutNode::from_layout_js(self.shadow_root.upcast())
|
|
}
|
|
|
|
fn host(&self) -> ServoLayoutElement<'lr> {
|
|
ServoLayoutElement::from_layout_js(self.shadow_root.get_host_for_layout())
|
|
}
|
|
|
|
fn style_data<'a>(&self) -> Option<&'a CascadeData>
|
|
where
|
|
Self: 'a,
|
|
{
|
|
Some(&self.shadow_root.get_style_data_for_layout())
|
|
}
|
|
}
|
|
|
|
impl<'lr> ServoShadowRoot<'lr> {
|
|
fn from_layout_js(shadow_root: LayoutDom<'lr, ShadowRoot>) -> Self {
|
|
ServoShadowRoot { shadow_root }
|
|
}
|
|
|
|
pub unsafe fn flush_stylesheets(
|
|
&self,
|
|
device: &Device,
|
|
quirks_mode: QuirksMode,
|
|
guard: &SharedRwLockReadGuard,
|
|
) {
|
|
self.shadow_root
|
|
.flush_stylesheets::<ServoLayoutElement>(device, quirks_mode, guard)
|
|
}
|
|
}
|
|
|
|
impl<'ln> TNode for ServoLayoutNode<'ln> {
|
|
type ConcreteDocument = ServoLayoutDocument<'ln>;
|
|
type ConcreteElement = ServoLayoutElement<'ln>;
|
|
type ConcreteShadowRoot = ServoShadowRoot<'ln>;
|
|
|
|
fn parent_node(&self) -> Option<Self> {
|
|
self.node
|
|
.composed_parent_node_ref()
|
|
.map(Self::from_layout_js)
|
|
}
|
|
|
|
fn first_child(&self) -> Option<Self> {
|
|
self.node.first_child_ref().map(Self::from_layout_js)
|
|
}
|
|
|
|
fn last_child(&self) -> Option<Self> {
|
|
self.node.last_child_ref().map(Self::from_layout_js)
|
|
}
|
|
|
|
fn prev_sibling(&self) -> Option<Self> {
|
|
self.node.prev_sibling_ref().map(Self::from_layout_js)
|
|
}
|
|
|
|
fn next_sibling(&self) -> Option<Self> {
|
|
self.node.next_sibling_ref().map(Self::from_layout_js)
|
|
}
|
|
|
|
fn owner_doc(&self) -> Self::ConcreteDocument {
|
|
ServoLayoutDocument::from_layout_js(self.node.owner_doc_for_layout())
|
|
}
|
|
|
|
fn traversal_parent(&self) -> Option<ServoLayoutElement<'ln>> {
|
|
let parent = self.parent_node()?;
|
|
if let Some(shadow) = parent.as_shadow_root() {
|
|
return Some(shadow.host());
|
|
};
|
|
parent.as_element()
|
|
}
|
|
|
|
fn opaque(&self) -> OpaqueNode {
|
|
unsafe { self.get_jsmanaged().opaque() }
|
|
}
|
|
|
|
fn debug_id(self) -> usize {
|
|
self.opaque().0
|
|
}
|
|
|
|
fn as_element(&self) -> Option<ServoLayoutElement<'ln>> {
|
|
as_element(self.node)
|
|
}
|
|
|
|
fn as_document(&self) -> Option<ServoLayoutDocument<'ln>> {
|
|
self.node
|
|
.downcast()
|
|
.map(ServoLayoutDocument::from_layout_js)
|
|
}
|
|
|
|
fn as_shadow_root(&self) -> Option<ServoShadowRoot<'ln>> {
|
|
self.node.downcast().map(ServoShadowRoot::from_layout_js)
|
|
}
|
|
|
|
fn is_in_document(&self) -> bool {
|
|
unsafe { self.node.get_flag(NodeFlags::IS_IN_DOC) }
|
|
}
|
|
}
|
|
|
|
impl<'ln> LayoutNode<'ln> for ServoLayoutNode<'ln> {
|
|
type ConcreteThreadSafeLayoutNode = ServoThreadSafeLayoutNode<'ln>;
|
|
|
|
fn to_threadsafe(&self) -> Self::ConcreteThreadSafeLayoutNode {
|
|
ServoThreadSafeLayoutNode::new(*self)
|
|
}
|
|
|
|
fn type_id(&self) -> LayoutNodeType {
|
|
self.script_type_id().into()
|
|
}
|
|
|
|
unsafe fn initialize_data(&self) {
|
|
if self.get_style_and_layout_data().is_none() {
|
|
let opaque = StyleAndOpaqueLayoutData::new(
|
|
StyleData::new(),
|
|
AtomicRefCell::new(LayoutDataForElement::default()),
|
|
);
|
|
self.init_style_and_opaque_layout_data(opaque);
|
|
};
|
|
}
|
|
|
|
unsafe fn init_style_and_opaque_layout_data(&self, data: Box<StyleAndOpaqueLayoutData>) {
|
|
self.get_jsmanaged().init_style_and_opaque_layout_data(data);
|
|
}
|
|
|
|
unsafe fn take_style_and_opaque_layout_data(&self) -> Box<StyleAndOpaqueLayoutData> {
|
|
self.get_jsmanaged().take_style_and_opaque_layout_data()
|
|
}
|
|
|
|
fn is_connected(&self) -> bool {
|
|
unsafe { self.node.get_flag(NodeFlags::IS_CONNECTED) }
|
|
}
|
|
}
|
|
|
|
impl<'dom> GetStyleAndOpaqueLayoutData<'dom> for ServoLayoutNode<'dom> {
|
|
fn get_style_and_opaque_layout_data(self) -> Option<&'dom StyleAndOpaqueLayoutData> {
|
|
unsafe { self.get_jsmanaged().get_style_and_opaque_layout_data() }
|
|
}
|
|
}
|
|
|
|
impl<'dom> GetStyleAndOpaqueLayoutData<'dom> for ServoLayoutElement<'dom> {
|
|
fn get_style_and_opaque_layout_data(self) -> Option<&'dom StyleAndOpaqueLayoutData> {
|
|
self.as_node().get_style_and_opaque_layout_data()
|
|
}
|
|
}
|
|
|
|
impl<'dom> GetStyleAndOpaqueLayoutData<'dom> for ServoThreadSafeLayoutNode<'dom> {
|
|
fn get_style_and_opaque_layout_data(self) -> Option<&'dom StyleAndOpaqueLayoutData> {
|
|
self.node.get_style_and_opaque_layout_data()
|
|
}
|
|
}
|
|
|
|
impl<'dom> GetStyleAndOpaqueLayoutData<'dom> for ServoThreadSafeLayoutElement<'dom> {
|
|
fn get_style_and_opaque_layout_data(self) -> Option<&'dom StyleAndOpaqueLayoutData> {
|
|
self.element.as_node().get_style_and_opaque_layout_data()
|
|
}
|
|
}
|
|
|
|
impl<'ln> ServoLayoutNode<'ln> {
|
|
/// Returns the interior of this node as a `LayoutDom`. This is highly unsafe for layout to
|
|
/// call and as such is marked `unsafe`.
|
|
pub unsafe fn get_jsmanaged(&self) -> LayoutDom<'ln, Node> {
|
|
self.node
|
|
}
|
|
}
|
|
|
|
// A wrapper around documents that ensures ayout can only ever access safe properties.
|
|
#[derive(Clone, Copy)]
|
|
pub struct ServoLayoutDocument<'dom> {
|
|
document: LayoutDom<'dom, Document>,
|
|
}
|
|
|
|
impl<'ld> TDocument for ServoLayoutDocument<'ld> {
|
|
type ConcreteNode = ServoLayoutNode<'ld>;
|
|
|
|
fn as_node(&self) -> Self::ConcreteNode {
|
|
ServoLayoutNode::from_layout_js(self.document.upcast())
|
|
}
|
|
|
|
fn quirks_mode(&self) -> QuirksMode {
|
|
self.document.quirks_mode()
|
|
}
|
|
|
|
fn is_html_document(&self) -> bool {
|
|
self.document.is_html_document_for_layout()
|
|
}
|
|
|
|
fn shared_lock(&self) -> &StyleSharedRwLock {
|
|
self.document.style_shared_lock()
|
|
}
|
|
}
|
|
|
|
impl<'ld> ServoLayoutDocument<'ld> {
|
|
pub fn root_element(&self) -> Option<ServoLayoutElement<'ld>> {
|
|
self.as_node()
|
|
.dom_children()
|
|
.flat_map(|n| n.as_element())
|
|
.next()
|
|
}
|
|
|
|
pub fn needs_paint_from_layout(&self) {
|
|
unsafe { self.document.needs_paint_from_layout() }
|
|
}
|
|
|
|
pub fn will_paint(&self) {
|
|
unsafe { self.document.will_paint() }
|
|
}
|
|
|
|
pub fn style_shared_lock(&self) -> &StyleSharedRwLock {
|
|
self.document.style_shared_lock()
|
|
}
|
|
|
|
pub fn shadow_roots(&self) -> Vec<ServoShadowRoot> {
|
|
unsafe {
|
|
self.document
|
|
.shadow_roots()
|
|
.iter()
|
|
.map(|sr| {
|
|
debug_assert!(sr.upcast::<Node>().get_flag(NodeFlags::IS_CONNECTED));
|
|
ServoShadowRoot::from_layout_js(*sr)
|
|
})
|
|
.collect()
|
|
}
|
|
}
|
|
|
|
pub fn flush_shadow_roots_stylesheets(
|
|
&self,
|
|
device: &Device,
|
|
quirks_mode: QuirksMode,
|
|
guard: &SharedRwLockReadGuard,
|
|
) {
|
|
unsafe {
|
|
if !self.document.shadow_roots_styles_changed() {
|
|
return;
|
|
}
|
|
self.document.flush_shadow_roots_stylesheets();
|
|
for shadow_root in self.shadow_roots() {
|
|
shadow_root.flush_stylesheets(device, quirks_mode, guard);
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn from_layout_js(doc: LayoutDom<'ld, Document>) -> Self {
|
|
ServoLayoutDocument { document: doc }
|
|
}
|
|
}
|
|
|
|
/// A wrapper around elements that ensures layout can only ever access safe properties.
|
|
#[derive(Clone, Copy)]
|
|
pub struct ServoLayoutElement<'dom> {
|
|
element: LayoutDom<'dom, Element>,
|
|
}
|
|
|
|
impl<'le> fmt::Debug for ServoLayoutElement<'le> {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
write!(f, "<{}", self.element.local_name())?;
|
|
if let Some(id) = self.id() {
|
|
write!(f, " id={}", id)?;
|
|
}
|
|
write!(f, "> ({:#x})", self.as_node().opaque().0)
|
|
}
|
|
}
|
|
|
|
impl<'le> TElement for ServoLayoutElement<'le> {
|
|
type ConcreteNode = ServoLayoutNode<'le>;
|
|
type TraversalChildrenIterator = DomChildren<Self::ConcreteNode>;
|
|
|
|
type FontMetricsProvider = ServoMetricsProvider;
|
|
|
|
fn as_node(&self) -> ServoLayoutNode<'le> {
|
|
ServoLayoutNode::from_layout_js(self.element.upcast())
|
|
}
|
|
|
|
fn traversal_children(&self) -> LayoutIterator<Self::TraversalChildrenIterator> {
|
|
LayoutIterator(if let Some(shadow) = self.shadow_root() {
|
|
shadow.as_node().dom_children()
|
|
} else {
|
|
self.as_node().dom_children()
|
|
})
|
|
}
|
|
|
|
fn is_html_element(&self) -> bool {
|
|
self.element.is_html_element()
|
|
}
|
|
|
|
fn is_mathml_element(&self) -> bool {
|
|
*self.element.namespace() == ns!(mathml)
|
|
}
|
|
|
|
fn is_svg_element(&self) -> bool {
|
|
*self.element.namespace() == ns!(svg)
|
|
}
|
|
|
|
fn has_part_attr(&self) -> bool {
|
|
false
|
|
}
|
|
|
|
fn exports_any_part(&self) -> bool {
|
|
false
|
|
}
|
|
|
|
fn style_attribute(&self) -> Option<ArcBorrow<StyleLocked<PropertyDeclarationBlock>>> {
|
|
unsafe {
|
|
(*self.element.style_attribute())
|
|
.as_ref()
|
|
.map(|x| x.borrow_arc())
|
|
}
|
|
}
|
|
|
|
fn may_have_animations(&self) -> bool {
|
|
true
|
|
}
|
|
|
|
fn animation_rule(
|
|
&self,
|
|
context: &SharedStyleContext,
|
|
) -> Option<Arc<StyleLocked<PropertyDeclarationBlock>>> {
|
|
let node = self.as_node();
|
|
let document = node.owner_doc();
|
|
context
|
|
.animation_states
|
|
.read()
|
|
.get(&node.opaque())
|
|
.and_then(|set| {
|
|
set.get_value_map_for_active_animations(context.current_time_for_animations)
|
|
})
|
|
.map(|map| {
|
|
Arc::new(
|
|
document
|
|
.style_shared_lock()
|
|
.wrap(PropertyDeclarationBlock::from_animation_value_map(&map)),
|
|
)
|
|
})
|
|
}
|
|
|
|
fn transition_rule(
|
|
&self,
|
|
context: &SharedStyleContext,
|
|
) -> Option<Arc<StyleLocked<PropertyDeclarationBlock>>> {
|
|
let node = self.as_node();
|
|
let document = node.owner_doc();
|
|
context
|
|
.animation_states
|
|
.read()
|
|
.get(&node.opaque())
|
|
.and_then(|set| {
|
|
set.get_value_map_for_active_transitions(context.current_time_for_animations)
|
|
})
|
|
.map(|map| {
|
|
Arc::new(
|
|
document
|
|
.style_shared_lock()
|
|
.wrap(PropertyDeclarationBlock::from_animation_value_map(&map)),
|
|
)
|
|
})
|
|
}
|
|
|
|
fn state(&self) -> ElementState {
|
|
self.element.get_state_for_layout()
|
|
}
|
|
|
|
#[inline]
|
|
fn has_attr(&self, namespace: &Namespace, attr: &LocalName) -> bool {
|
|
self.get_attr(namespace, attr).is_some()
|
|
}
|
|
|
|
#[inline]
|
|
fn id(&self) -> Option<&Atom> {
|
|
unsafe { (*self.element.id_attribute()).as_ref() }
|
|
}
|
|
|
|
#[inline(always)]
|
|
fn each_class<F>(&self, mut callback: F)
|
|
where
|
|
F: FnMut(&Atom),
|
|
{
|
|
if let Some(ref classes) = self.element.get_classes_for_layout() {
|
|
for class in *classes {
|
|
callback(class)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn has_dirty_descendants(&self) -> bool {
|
|
unsafe {
|
|
self.as_node()
|
|
.node
|
|
.get_flag(NodeFlags::HAS_DIRTY_DESCENDANTS)
|
|
}
|
|
}
|
|
|
|
fn has_snapshot(&self) -> bool {
|
|
unsafe { self.as_node().node.get_flag(NodeFlags::HAS_SNAPSHOT) }
|
|
}
|
|
|
|
fn handled_snapshot(&self) -> bool {
|
|
unsafe { self.as_node().node.get_flag(NodeFlags::HANDLED_SNAPSHOT) }
|
|
}
|
|
|
|
unsafe fn set_handled_snapshot(&self) {
|
|
self.as_node()
|
|
.node
|
|
.set_flag(NodeFlags::HANDLED_SNAPSHOT, true);
|
|
}
|
|
|
|
unsafe fn set_dirty_descendants(&self) {
|
|
debug_assert!(self.as_node().is_connected());
|
|
self.as_node()
|
|
.node
|
|
.set_flag(NodeFlags::HAS_DIRTY_DESCENDANTS, true)
|
|
}
|
|
|
|
unsafe fn unset_dirty_descendants(&self) {
|
|
self.as_node()
|
|
.node
|
|
.set_flag(NodeFlags::HAS_DIRTY_DESCENDANTS, false)
|
|
}
|
|
|
|
fn store_children_to_process(&self, n: isize) {
|
|
let data = self.get_style_data().unwrap();
|
|
data.parallel
|
|
.children_to_process
|
|
.store(n, Ordering::Relaxed);
|
|
}
|
|
|
|
fn did_process_child(&self) -> isize {
|
|
let data = self.get_style_data().unwrap();
|
|
let old_value = data
|
|
.parallel
|
|
.children_to_process
|
|
.fetch_sub(1, Ordering::Relaxed);
|
|
debug_assert!(old_value >= 1);
|
|
old_value - 1
|
|
}
|
|
|
|
unsafe fn clear_data(&self) {
|
|
if self.get_style_and_layout_data().is_some() {
|
|
drop(self.as_node().take_style_and_opaque_layout_data());
|
|
}
|
|
}
|
|
|
|
unsafe fn ensure_data(&self) -> AtomicRefMut<ElementData> {
|
|
self.as_node().initialize_data();
|
|
self.mutate_data().unwrap()
|
|
}
|
|
|
|
/// Whether there is an ElementData container.
|
|
fn has_data(&self) -> bool {
|
|
self.get_style_data().is_some()
|
|
}
|
|
|
|
/// Immutably borrows the ElementData.
|
|
fn borrow_data(&self) -> Option<AtomicRef<ElementData>> {
|
|
self.get_style_data().map(|data| data.element_data.borrow())
|
|
}
|
|
|
|
/// Mutably borrows the ElementData.
|
|
fn mutate_data(&self) -> Option<AtomicRefMut<ElementData>> {
|
|
self.get_style_data()
|
|
.map(|data| data.element_data.borrow_mut())
|
|
}
|
|
|
|
fn skip_item_display_fixup(&self) -> bool {
|
|
false
|
|
}
|
|
|
|
unsafe fn set_selector_flags(&self, flags: ElementSelectorFlags) {
|
|
self.element.insert_selector_flags(flags);
|
|
}
|
|
|
|
fn has_selector_flags(&self, flags: ElementSelectorFlags) -> bool {
|
|
self.element.has_selector_flags(flags)
|
|
}
|
|
|
|
fn has_animations(&self, context: &SharedStyleContext) -> bool {
|
|
return self.has_css_animations(context) || self.has_css_transitions(context);
|
|
}
|
|
|
|
fn has_css_animations(&self, context: &SharedStyleContext) -> bool {
|
|
context
|
|
.animation_states
|
|
.read()
|
|
.get(&self.as_node().opaque())
|
|
.map(|set| set.has_active_animation())
|
|
.unwrap_or(false)
|
|
}
|
|
|
|
fn has_css_transitions(&self, context: &SharedStyleContext) -> bool {
|
|
context
|
|
.animation_states
|
|
.read()
|
|
.get(&self.as_node().opaque())
|
|
.map(|set| set.has_active_transition())
|
|
.unwrap_or(false)
|
|
}
|
|
|
|
#[inline]
|
|
fn lang_attr(&self) -> Option<SelectorAttrValue> {
|
|
self.get_attr(&ns!(xml), &local_name!("lang"))
|
|
.or_else(|| self.get_attr(&ns!(), &local_name!("lang")))
|
|
.map(|v| String::from(v as &str))
|
|
}
|
|
|
|
fn match_element_lang(
|
|
&self,
|
|
override_lang: Option<Option<SelectorAttrValue>>,
|
|
value: &Lang,
|
|
) -> bool {
|
|
// Servo supports :lang() from CSS Selectors 4, which can take a comma-
|
|
// separated list of language tags in the pseudo-class, and which
|
|
// performs RFC 4647 extended filtering matching on them.
|
|
//
|
|
// FIXME(heycam): This is wrong, since extended_filtering accepts
|
|
// a string containing commas (separating each language tag in
|
|
// a list) but the pseudo-class instead should be parsing and
|
|
// storing separate <ident> or <string>s for each language tag.
|
|
//
|
|
// FIXME(heycam): Look at `element`'s document's Content-Language
|
|
// HTTP header for language tags to match `value` against. To
|
|
// do this, we should make `get_lang_for_layout` return an Option,
|
|
// so we can decide when to fall back to the Content-Language check.
|
|
let element_lang = match override_lang {
|
|
Some(Some(lang)) => lang,
|
|
Some(None) => String::new(),
|
|
None => self.element.get_lang_for_layout(),
|
|
};
|
|
extended_filtering(&element_lang, &*value)
|
|
}
|
|
|
|
fn is_html_document_body_element(&self) -> bool {
|
|
// This is only used for the "tables inherit from body" quirk, which we
|
|
// don't implement.
|
|
//
|
|
// FIXME(emilio): We should be able to give the right answer though!
|
|
false
|
|
}
|
|
|
|
fn synthesize_presentational_hints_for_legacy_attributes<V>(
|
|
&self,
|
|
_visited_handling: VisitedHandlingMode,
|
|
hints: &mut V,
|
|
) where
|
|
V: Push<ApplicableDeclarationBlock>,
|
|
{
|
|
self.element
|
|
.synthesize_presentational_hints_for_legacy_attributes(hints);
|
|
}
|
|
|
|
/// The shadow root this element is a host of.
|
|
fn shadow_root(&self) -> Option<ServoShadowRoot<'le>> {
|
|
self.element
|
|
.get_shadow_root_for_layout()
|
|
.map(ServoShadowRoot::from_layout_js)
|
|
}
|
|
|
|
/// The shadow root which roots the subtree this element is contained in.
|
|
fn containing_shadow(&self) -> Option<ServoShadowRoot<'le>> {
|
|
self.element
|
|
.upcast()
|
|
.containing_shadow_root_for_layout()
|
|
.map(ServoShadowRoot::from_layout_js)
|
|
}
|
|
|
|
fn local_name(&self) -> &LocalName {
|
|
self.element.local_name()
|
|
}
|
|
|
|
fn namespace(&self) -> &Namespace {
|
|
self.element.namespace()
|
|
}
|
|
}
|
|
|
|
impl<'le> PartialEq for ServoLayoutElement<'le> {
|
|
fn eq(&self, other: &Self) -> bool {
|
|
self.as_node() == other.as_node()
|
|
}
|
|
}
|
|
|
|
impl<'le> Hash for ServoLayoutElement<'le> {
|
|
fn hash<H: Hasher>(&self, state: &mut H) {
|
|
self.element.hash(state);
|
|
}
|
|
}
|
|
|
|
impl<'le> Eq for ServoLayoutElement<'le> {}
|
|
|
|
impl<'le> ServoLayoutElement<'le> {
|
|
fn from_layout_js(el: LayoutDom<'le, Element>) -> Self {
|
|
ServoLayoutElement { element: el }
|
|
}
|
|
|
|
#[inline]
|
|
fn get_attr_enum(&self, namespace: &Namespace, name: &LocalName) -> Option<&AttrValue> {
|
|
self.element.get_attr_for_layout(namespace, name)
|
|
}
|
|
|
|
#[inline]
|
|
fn get_attr(&self, namespace: &Namespace, name: &LocalName) -> Option<&str> {
|
|
self.element.get_attr_val_for_layout(namespace, name)
|
|
}
|
|
|
|
fn get_style_data(&self) -> Option<&StyleData> {
|
|
self.get_style_and_opaque_layout_data()
|
|
.map(|data| &data.style_data)
|
|
}
|
|
|
|
pub unsafe fn unset_snapshot_flags(&self) {
|
|
self.as_node()
|
|
.node
|
|
.set_flag(NodeFlags::HAS_SNAPSHOT | NodeFlags::HANDLED_SNAPSHOT, false);
|
|
}
|
|
|
|
pub unsafe fn set_has_snapshot(&self) {
|
|
self.as_node().node.set_flag(NodeFlags::HAS_SNAPSHOT, true);
|
|
}
|
|
}
|
|
|
|
fn as_element<'dom>(node: LayoutDom<'dom, Node>) -> Option<ServoLayoutElement<'dom>> {
|
|
node.downcast().map(ServoLayoutElement::from_layout_js)
|
|
}
|
|
|
|
impl<'le> ::selectors::Element for ServoLayoutElement<'le> {
|
|
type Impl = SelectorImpl;
|
|
|
|
fn opaque(&self) -> ::selectors::OpaqueElement {
|
|
::selectors::OpaqueElement::new(unsafe { &*(self.as_node().opaque().0 as *const ()) })
|
|
}
|
|
|
|
fn parent_element(&self) -> Option<ServoLayoutElement<'le>> {
|
|
self.element
|
|
.upcast()
|
|
.composed_parent_node_ref()
|
|
.and_then(as_element)
|
|
}
|
|
|
|
fn parent_node_is_shadow_root(&self) -> bool {
|
|
match self.as_node().parent_node() {
|
|
None => false,
|
|
Some(node) => {
|
|
node.script_type_id() ==
|
|
NodeTypeId::DocumentFragment(DocumentFragmentTypeId::ShadowRoot)
|
|
},
|
|
}
|
|
}
|
|
|
|
fn containing_shadow_host(&self) -> Option<Self> {
|
|
self.containing_shadow().map(|s| s.host())
|
|
}
|
|
|
|
fn prev_sibling_element(&self) -> Option<ServoLayoutElement<'le>> {
|
|
let mut node = self.as_node();
|
|
while let Some(sibling) = node.prev_sibling() {
|
|
if let Some(element) = sibling.as_element() {
|
|
return Some(element);
|
|
}
|
|
node = sibling;
|
|
}
|
|
None
|
|
}
|
|
|
|
fn next_sibling_element(&self) -> Option<ServoLayoutElement<'le>> {
|
|
let mut node = self.as_node();
|
|
while let Some(sibling) = node.next_sibling() {
|
|
if let Some(element) = sibling.as_element() {
|
|
return Some(element);
|
|
}
|
|
node = sibling;
|
|
}
|
|
None
|
|
}
|
|
|
|
fn attr_matches(
|
|
&self,
|
|
ns: &NamespaceConstraint<&Namespace>,
|
|
local_name: &LocalName,
|
|
operation: &AttrSelectorOperation<&String>,
|
|
) -> bool {
|
|
match *ns {
|
|
NamespaceConstraint::Specific(ref ns) => self
|
|
.get_attr_enum(ns, local_name)
|
|
.map_or(false, |value| value.eval_selector(operation)),
|
|
NamespaceConstraint::Any => self
|
|
.element
|
|
.get_attr_vals_for_layout(local_name)
|
|
.iter()
|
|
.any(|value| value.eval_selector(operation)),
|
|
}
|
|
}
|
|
|
|
fn is_root(&self) -> bool {
|
|
match self.as_node().parent_node() {
|
|
None => false,
|
|
Some(node) => match node.script_type_id() {
|
|
NodeTypeId::Document(_) => true,
|
|
_ => false,
|
|
},
|
|
}
|
|
}
|
|
|
|
fn is_empty(&self) -> bool {
|
|
self.as_node()
|
|
.dom_children()
|
|
.all(|node| match node.script_type_id() {
|
|
NodeTypeId::Element(..) => false,
|
|
NodeTypeId::CharacterData(CharacterDataTypeId::Text(TextTypeId::Text)) => {
|
|
node.node.downcast().unwrap().data_for_layout().is_empty()
|
|
},
|
|
_ => true,
|
|
})
|
|
}
|
|
|
|
#[inline]
|
|
fn has_local_name(&self, name: &LocalName) -> bool {
|
|
self.element.local_name() == name
|
|
}
|
|
|
|
#[inline]
|
|
fn has_namespace(&self, ns: &Namespace) -> bool {
|
|
self.element.namespace() == ns
|
|
}
|
|
|
|
#[inline]
|
|
fn is_same_type(&self, other: &Self) -> bool {
|
|
self.element.local_name() == other.element.local_name() &&
|
|
self.element.namespace() == other.element.namespace()
|
|
}
|
|
|
|
fn is_pseudo_element(&self) -> bool {
|
|
false
|
|
}
|
|
|
|
fn match_pseudo_element(
|
|
&self,
|
|
_pseudo: &PseudoElement,
|
|
_context: &mut MatchingContext<Self::Impl>,
|
|
) -> bool {
|
|
false
|
|
}
|
|
|
|
fn match_non_ts_pseudo_class<F>(
|
|
&self,
|
|
pseudo_class: &NonTSPseudoClass,
|
|
_: &mut MatchingContext<Self::Impl>,
|
|
_: &mut F,
|
|
) -> bool
|
|
where
|
|
F: FnMut(&Self, ElementSelectorFlags),
|
|
{
|
|
match *pseudo_class {
|
|
// https://github.com/servo/servo/issues/8718
|
|
NonTSPseudoClass::Link | NonTSPseudoClass::AnyLink => self.is_link(),
|
|
NonTSPseudoClass::Visited => false,
|
|
|
|
NonTSPseudoClass::Lang(ref lang) => self.match_element_lang(None, &*lang),
|
|
|
|
NonTSPseudoClass::ServoNonZeroBorder => {
|
|
match self
|
|
.element
|
|
.get_attr_for_layout(&ns!(), &local_name!("border"))
|
|
{
|
|
None | Some(&AttrValue::UInt(_, 0)) => false,
|
|
_ => true,
|
|
}
|
|
},
|
|
NonTSPseudoClass::ReadOnly => !self
|
|
.element
|
|
.get_state_for_layout()
|
|
.contains(pseudo_class.state_flag()),
|
|
|
|
NonTSPseudoClass::Active |
|
|
NonTSPseudoClass::Focus |
|
|
NonTSPseudoClass::Fullscreen |
|
|
NonTSPseudoClass::Hover |
|
|
NonTSPseudoClass::Defined |
|
|
NonTSPseudoClass::Enabled |
|
|
NonTSPseudoClass::Disabled |
|
|
NonTSPseudoClass::Checked |
|
|
NonTSPseudoClass::Indeterminate |
|
|
NonTSPseudoClass::ReadWrite |
|
|
NonTSPseudoClass::PlaceholderShown |
|
|
NonTSPseudoClass::Target => self
|
|
.element
|
|
.get_state_for_layout()
|
|
.contains(pseudo_class.state_flag()),
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
fn is_link(&self) -> bool {
|
|
match self.as_node().script_type_id() {
|
|
// https://html.spec.whatwg.org/multipage/#selector-link
|
|
NodeTypeId::Element(ElementTypeId::HTMLElement(
|
|
HTMLElementTypeId::HTMLAnchorElement,
|
|
)) |
|
|
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAreaElement)) |
|
|
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLLinkElement)) => {
|
|
self.element
|
|
.get_attr_val_for_layout(&ns!(), &local_name!("href"))
|
|
.is_some()
|
|
},
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
fn has_id(&self, id: &Atom, case_sensitivity: CaseSensitivity) -> bool {
|
|
unsafe {
|
|
(*self.element.id_attribute())
|
|
.as_ref()
|
|
.map_or(false, |atom| case_sensitivity.eq_atom(atom, id))
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
fn is_part(&self, _name: &Atom) -> bool {
|
|
false
|
|
}
|
|
|
|
fn imported_part(&self, _: &Atom) -> Option<Atom> {
|
|
None
|
|
}
|
|
|
|
#[inline]
|
|
fn has_class(&self, name: &Atom, case_sensitivity: CaseSensitivity) -> bool {
|
|
self.element.has_class_for_layout(name, case_sensitivity)
|
|
}
|
|
|
|
fn is_html_slot_element(&self) -> bool {
|
|
self.element.is_html_element() && self.local_name() == &local_name!("slot")
|
|
}
|
|
|
|
fn is_html_element_in_html_document(&self) -> bool {
|
|
if !self.element.is_html_element() {
|
|
return false;
|
|
}
|
|
|
|
self.as_node().owner_doc().is_html_document()
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy, Debug)]
|
|
pub struct ServoThreadSafeLayoutNode<'ln> {
|
|
/// The wrapped node.
|
|
node: ServoLayoutNode<'ln>,
|
|
|
|
/// The pseudo-element type, with (optionally)
|
|
/// a specified display value to override the stylesheet.
|
|
pseudo: PseudoElementType,
|
|
}
|
|
|
|
impl<'a> PartialEq for ServoThreadSafeLayoutNode<'a> {
|
|
#[inline]
|
|
fn eq(&self, other: &ServoThreadSafeLayoutNode<'a>) -> bool {
|
|
self.node == other.node
|
|
}
|
|
}
|
|
|
|
impl<'ln> DangerousThreadSafeLayoutNode<'ln> for ServoThreadSafeLayoutNode<'ln> {
|
|
unsafe fn dangerous_first_child(&self) -> Option<Self> {
|
|
self.get_jsmanaged()
|
|
.first_child_ref()
|
|
.map(ServoLayoutNode::from_layout_js)
|
|
.map(Self::new)
|
|
}
|
|
unsafe fn dangerous_next_sibling(&self) -> Option<Self> {
|
|
self.get_jsmanaged()
|
|
.next_sibling_ref()
|
|
.map(ServoLayoutNode::from_layout_js)
|
|
.map(Self::new)
|
|
}
|
|
}
|
|
|
|
impl<'ln> ServoThreadSafeLayoutNode<'ln> {
|
|
/// Creates a new `ServoThreadSafeLayoutNode` from the given `ServoLayoutNode`.
|
|
pub fn new(node: ServoLayoutNode<'ln>) -> Self {
|
|
ServoThreadSafeLayoutNode {
|
|
node: node.clone(),
|
|
pseudo: PseudoElementType::Normal,
|
|
}
|
|
}
|
|
|
|
/// Returns the interior of this node as a `LayoutDom`. This is highly unsafe for layout to
|
|
/// call and as such is marked `unsafe`.
|
|
unsafe fn get_jsmanaged(&self) -> LayoutDom<'ln, Node> {
|
|
self.node.get_jsmanaged()
|
|
}
|
|
}
|
|
|
|
impl<'ln> NodeInfo for ServoThreadSafeLayoutNode<'ln> {
|
|
fn is_element(&self) -> bool {
|
|
self.node.is_element()
|
|
}
|
|
|
|
fn is_text_node(&self) -> bool {
|
|
self.node.is_text_node()
|
|
}
|
|
}
|
|
|
|
impl<'ln> ThreadSafeLayoutNode<'ln> for ServoThreadSafeLayoutNode<'ln> {
|
|
type ConcreteNode = ServoLayoutNode<'ln>;
|
|
type ConcreteThreadSafeLayoutElement = ServoThreadSafeLayoutElement<'ln>;
|
|
type ConcreteElement = ServoLayoutElement<'ln>;
|
|
type ChildrenIterator = ThreadSafeLayoutNodeChildrenIterator<Self>;
|
|
|
|
fn opaque(&self) -> OpaqueNode {
|
|
unsafe { self.get_jsmanaged().opaque() }
|
|
}
|
|
|
|
fn type_id(&self) -> Option<LayoutNodeType> {
|
|
if self.pseudo == PseudoElementType::Normal {
|
|
Some(self.node.type_id())
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
fn parent_style(&self) -> Arc<ComputedValues> {
|
|
let parent = self.node.parent_node().unwrap().as_element().unwrap();
|
|
let parent_data = parent.borrow_data().unwrap();
|
|
parent_data.styles.primary().clone()
|
|
}
|
|
|
|
fn debug_id(self) -> usize {
|
|
self.node.debug_id()
|
|
}
|
|
|
|
fn children(&self) -> LayoutIterator<Self::ChildrenIterator> {
|
|
if let Some(shadow) = self.node.as_element().and_then(|e| e.shadow_root()) {
|
|
return LayoutIterator(ThreadSafeLayoutNodeChildrenIterator::new(
|
|
shadow.as_node().to_threadsafe(),
|
|
));
|
|
}
|
|
LayoutIterator(ThreadSafeLayoutNodeChildrenIterator::new(*self))
|
|
}
|
|
|
|
fn as_element(&self) -> Option<ServoThreadSafeLayoutElement<'ln>> {
|
|
self.node
|
|
.as_element()
|
|
.map(|el| ServoThreadSafeLayoutElement {
|
|
element: el,
|
|
pseudo: self.pseudo,
|
|
})
|
|
}
|
|
|
|
fn get_style_and_opaque_layout_data(self) -> Option<&'ln StyleAndOpaqueLayoutData> {
|
|
self.node.get_style_and_opaque_layout_data()
|
|
}
|
|
|
|
fn is_ignorable_whitespace(&self, context: &SharedStyleContext) -> bool {
|
|
unsafe {
|
|
let text: LayoutDom<Text> = match self.get_jsmanaged().downcast() {
|
|
Some(text) => text,
|
|
None => return false,
|
|
};
|
|
|
|
if !is_whitespace(text.upcast().data_for_layout()) {
|
|
return false;
|
|
}
|
|
|
|
// NB: See the rules for `white-space` here:
|
|
//
|
|
// http://www.w3.org/TR/CSS21/text.html#propdef-white-space
|
|
//
|
|
// If you implement other values for this property, you will almost certainly
|
|
// want to update this check.
|
|
!self
|
|
.style(context)
|
|
.get_inherited_text()
|
|
.white_space
|
|
.preserve_newlines()
|
|
}
|
|
}
|
|
|
|
unsafe fn unsafe_get(self) -> Self::ConcreteNode {
|
|
self.node
|
|
}
|
|
|
|
fn node_text_content(self) -> Cow<'ln, str> {
|
|
unsafe { self.get_jsmanaged().text_content() }
|
|
}
|
|
|
|
fn selection(&self) -> Option<Range<ByteIndex>> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
|
|
this.selection().map(|range| {
|
|
Range::new(
|
|
ByteIndex(range.start as isize),
|
|
ByteIndex(range.len() as isize),
|
|
)
|
|
})
|
|
}
|
|
|
|
fn image_url(&self) -> Option<ServoUrl> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
this.image_url()
|
|
}
|
|
|
|
fn image_density(&self) -> Option<f64> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
this.image_density()
|
|
}
|
|
|
|
fn image_data(&self) -> Option<(Option<StdArc<Image>>, Option<ImageMetadata>)> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
this.image_data()
|
|
}
|
|
|
|
fn canvas_data(&self) -> Option<HTMLCanvasData> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
this.canvas_data()
|
|
}
|
|
|
|
fn media_data(&self) -> Option<HTMLMediaData> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
this.media_data()
|
|
}
|
|
|
|
fn svg_data(&self) -> Option<SVGSVGData> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
this.svg_data()
|
|
}
|
|
|
|
// Can return None if the iframe has no nested browsing context
|
|
fn iframe_browsing_context_id(&self) -> Option<BrowsingContextId> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
this.iframe_browsing_context_id()
|
|
}
|
|
|
|
// Can return None if the iframe has no nested browsing context
|
|
fn iframe_pipeline_id(&self) -> Option<PipelineId> {
|
|
let this = unsafe { self.get_jsmanaged() };
|
|
this.iframe_pipeline_id()
|
|
}
|
|
|
|
fn get_colspan(&self) -> u32 {
|
|
unsafe {
|
|
self.get_jsmanaged()
|
|
.downcast::<Element>()
|
|
.unwrap()
|
|
.get_colspan()
|
|
}
|
|
}
|
|
|
|
fn get_rowspan(&self) -> u32 {
|
|
unsafe {
|
|
self.get_jsmanaged()
|
|
.downcast::<Element>()
|
|
.unwrap()
|
|
.get_rowspan()
|
|
}
|
|
}
|
|
}
|
|
|
|
pub struct ThreadSafeLayoutNodeChildrenIterator<ConcreteNode> {
|
|
current_node: Option<ConcreteNode>,
|
|
parent_node: ConcreteNode,
|
|
}
|
|
|
|
impl<'dom, ConcreteNode> ThreadSafeLayoutNodeChildrenIterator<ConcreteNode>
|
|
where
|
|
ConcreteNode: DangerousThreadSafeLayoutNode<'dom>,
|
|
{
|
|
pub fn new(parent: ConcreteNode) -> Self {
|
|
let first_child: Option<ConcreteNode> = match parent.get_pseudo_element_type() {
|
|
PseudoElementType::Normal => parent
|
|
.get_before_pseudo()
|
|
.or_else(|| parent.get_details_summary_pseudo())
|
|
.or_else(|| unsafe { parent.dangerous_first_child() }),
|
|
PseudoElementType::DetailsContent | PseudoElementType::DetailsSummary => unsafe {
|
|
parent.dangerous_first_child()
|
|
},
|
|
_ => None,
|
|
};
|
|
ThreadSafeLayoutNodeChildrenIterator {
|
|
current_node: first_child,
|
|
parent_node: parent,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'dom, ConcreteNode> Iterator for ThreadSafeLayoutNodeChildrenIterator<ConcreteNode>
|
|
where
|
|
ConcreteNode: DangerousThreadSafeLayoutNode<'dom>,
|
|
{
|
|
type Item = ConcreteNode;
|
|
fn next(&mut self) -> Option<ConcreteNode> {
|
|
use selectors::Element;
|
|
match self.parent_node.get_pseudo_element_type() {
|
|
PseudoElementType::Before | PseudoElementType::After => None,
|
|
|
|
PseudoElementType::DetailsSummary => {
|
|
let mut current_node = self.current_node.clone();
|
|
loop {
|
|
let next_node = if let Some(ref node) = current_node {
|
|
if let Some(element) = node.as_element() {
|
|
if element.has_local_name(&local_name!("summary")) &&
|
|
element.has_namespace(&ns!(html))
|
|
{
|
|
self.current_node = None;
|
|
return Some(node.clone());
|
|
}
|
|
}
|
|
unsafe { node.dangerous_next_sibling() }
|
|
} else {
|
|
self.current_node = None;
|
|
return None;
|
|
};
|
|
current_node = next_node;
|
|
}
|
|
},
|
|
|
|
PseudoElementType::DetailsContent => {
|
|
let node = self.current_node.clone();
|
|
let node = node.and_then(|node| {
|
|
if node.is_element() &&
|
|
node.as_element()
|
|
.unwrap()
|
|
.has_local_name(&local_name!("summary")) &&
|
|
node.as_element().unwrap().has_namespace(&ns!(html))
|
|
{
|
|
unsafe { node.dangerous_next_sibling() }
|
|
} else {
|
|
Some(node)
|
|
}
|
|
});
|
|
self.current_node = node.and_then(|node| unsafe { node.dangerous_next_sibling() });
|
|
node
|
|
},
|
|
|
|
PseudoElementType::Normal => {
|
|
let node = self.current_node.clone();
|
|
if let Some(ref node) = node {
|
|
self.current_node = match node.get_pseudo_element_type() {
|
|
PseudoElementType::Before => self
|
|
.parent_node
|
|
.get_details_summary_pseudo()
|
|
.or_else(|| unsafe { self.parent_node.dangerous_first_child() })
|
|
.or_else(|| self.parent_node.get_after_pseudo()),
|
|
PseudoElementType::Normal => unsafe { node.dangerous_next_sibling() }
|
|
.or_else(|| self.parent_node.get_after_pseudo()),
|
|
PseudoElementType::DetailsSummary => {
|
|
self.parent_node.get_details_content_pseudo()
|
|
},
|
|
PseudoElementType::DetailsContent => self.parent_node.get_after_pseudo(),
|
|
PseudoElementType::After => None,
|
|
};
|
|
}
|
|
node
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
/// A wrapper around elements that ensures layout can only
|
|
/// ever access safe properties and cannot race on elements.
|
|
#[derive(Clone, Copy, Debug)]
|
|
pub struct ServoThreadSafeLayoutElement<'le> {
|
|
element: ServoLayoutElement<'le>,
|
|
|
|
/// The pseudo-element type, with (optionally)
|
|
/// a specified display value to override the stylesheet.
|
|
pseudo: PseudoElementType,
|
|
}
|
|
|
|
impl<'le> ThreadSafeLayoutElement<'le> for ServoThreadSafeLayoutElement<'le> {
|
|
type ConcreteThreadSafeLayoutNode = ServoThreadSafeLayoutNode<'le>;
|
|
type ConcreteElement = ServoLayoutElement<'le>;
|
|
|
|
fn as_node(&self) -> ServoThreadSafeLayoutNode<'le> {
|
|
ServoThreadSafeLayoutNode {
|
|
node: self.element.as_node(),
|
|
pseudo: self.pseudo.clone(),
|
|
}
|
|
}
|
|
|
|
fn get_pseudo_element_type(&self) -> PseudoElementType {
|
|
self.pseudo
|
|
}
|
|
|
|
fn with_pseudo(&self, pseudo: PseudoElementType) -> Self {
|
|
ServoThreadSafeLayoutElement {
|
|
element: self.element.clone(),
|
|
pseudo,
|
|
}
|
|
}
|
|
|
|
fn type_id(&self) -> Option<LayoutNodeType> {
|
|
self.as_node().type_id()
|
|
}
|
|
|
|
unsafe fn unsafe_get(self) -> ServoLayoutElement<'le> {
|
|
self.element
|
|
}
|
|
|
|
fn get_attr_enum(&self, namespace: &Namespace, name: &LocalName) -> Option<&AttrValue> {
|
|
self.element.get_attr_enum(namespace, name)
|
|
}
|
|
|
|
fn get_attr<'a>(&'a self, namespace: &Namespace, name: &LocalName) -> Option<&'a str> {
|
|
self.element.get_attr(namespace, name)
|
|
}
|
|
|
|
fn style_data(&self) -> AtomicRef<ElementData> {
|
|
match self.element.borrow_data() {
|
|
Some(data) => data,
|
|
None => panic!("could not find styles for <{}>", self.element.local_name()),
|
|
}
|
|
}
|
|
|
|
fn is_shadow_host(&self) -> bool {
|
|
self.element.shadow_root().is_some()
|
|
}
|
|
}
|
|
|
|
/// This implementation of `::selectors::Element` is used for implementing lazy
|
|
/// pseudo-elements.
|
|
///
|
|
/// Lazy pseudo-elements in Servo only allows selectors using safe properties,
|
|
/// i.e., local_name, attributes, so they can only be used for **private**
|
|
/// pseudo-elements (like `::-servo-details-content`).
|
|
///
|
|
/// Probably a few more of this functions can be implemented (like `has_class`, etc.),
|
|
/// but they have no use right now.
|
|
///
|
|
/// Note that the element implementation is needed only for selector matching,
|
|
/// not for inheritance (styles are inherited appropiately).
|
|
impl<'le> ::selectors::Element for ServoThreadSafeLayoutElement<'le> {
|
|
type Impl = SelectorImpl;
|
|
|
|
fn opaque(&self) -> ::selectors::OpaqueElement {
|
|
::selectors::OpaqueElement::new(unsafe { &*(self.as_node().opaque().0 as *const ()) })
|
|
}
|
|
|
|
fn is_pseudo_element(&self) -> bool {
|
|
false
|
|
}
|
|
|
|
fn parent_element(&self) -> Option<Self> {
|
|
warn!("ServoThreadSafeLayoutElement::parent_element called");
|
|
None
|
|
}
|
|
|
|
fn parent_node_is_shadow_root(&self) -> bool {
|
|
false
|
|
}
|
|
|
|
fn containing_shadow_host(&self) -> Option<Self> {
|
|
None
|
|
}
|
|
|
|
// Skips non-element nodes
|
|
fn prev_sibling_element(&self) -> Option<Self> {
|
|
warn!("ServoThreadSafeLayoutElement::prev_sibling_element called");
|
|
None
|
|
}
|
|
|
|
// Skips non-element nodes
|
|
fn next_sibling_element(&self) -> Option<Self> {
|
|
warn!("ServoThreadSafeLayoutElement::next_sibling_element called");
|
|
None
|
|
}
|
|
|
|
fn is_html_slot_element(&self) -> bool {
|
|
self.element.is_html_slot_element()
|
|
}
|
|
|
|
fn is_html_element_in_html_document(&self) -> bool {
|
|
debug!("ServoThreadSafeLayoutElement::is_html_element_in_html_document called");
|
|
true
|
|
}
|
|
|
|
#[inline]
|
|
fn has_local_name(&self, name: &LocalName) -> bool {
|
|
self.element.local_name() == name
|
|
}
|
|
|
|
#[inline]
|
|
fn has_namespace(&self, ns: &Namespace) -> bool {
|
|
self.element.namespace() == ns
|
|
}
|
|
|
|
#[inline]
|
|
fn is_same_type(&self, other: &Self) -> bool {
|
|
self.element.local_name() == other.element.local_name() &&
|
|
self.element.namespace() == other.element.namespace()
|
|
}
|
|
|
|
fn match_pseudo_element(
|
|
&self,
|
|
_pseudo: &PseudoElement,
|
|
_context: &mut MatchingContext<Self::Impl>,
|
|
) -> bool {
|
|
false
|
|
}
|
|
|
|
fn attr_matches(
|
|
&self,
|
|
ns: &NamespaceConstraint<&Namespace>,
|
|
local_name: &LocalName,
|
|
operation: &AttrSelectorOperation<&String>,
|
|
) -> bool {
|
|
match *ns {
|
|
NamespaceConstraint::Specific(ref ns) => self
|
|
.get_attr_enum(ns, local_name)
|
|
.map_or(false, |value| value.eval_selector(operation)),
|
|
NamespaceConstraint::Any => {
|
|
let values = self.element.element.get_attr_vals_for_layout(local_name);
|
|
values.iter().any(|v| v.eval_selector(operation))
|
|
},
|
|
}
|
|
}
|
|
|
|
fn match_non_ts_pseudo_class<F>(
|
|
&self,
|
|
_: &NonTSPseudoClass,
|
|
_: &mut MatchingContext<Self::Impl>,
|
|
_: &mut F,
|
|
) -> bool
|
|
where
|
|
F: FnMut(&Self, ElementSelectorFlags),
|
|
{
|
|
// NB: This could maybe be implemented
|
|
warn!("ServoThreadSafeLayoutElement::match_non_ts_pseudo_class called");
|
|
false
|
|
}
|
|
|
|
fn is_link(&self) -> bool {
|
|
warn!("ServoThreadSafeLayoutElement::is_link called");
|
|
false
|
|
}
|
|
|
|
fn has_id(&self, _id: &Atom, _case_sensitivity: CaseSensitivity) -> bool {
|
|
debug!("ServoThreadSafeLayoutElement::has_id called");
|
|
false
|
|
}
|
|
|
|
#[inline]
|
|
fn is_part(&self, _name: &Atom) -> bool {
|
|
debug!("ServoThreadSafeLayoutElement::is_part called");
|
|
false
|
|
}
|
|
|
|
fn imported_part(&self, _: &Atom) -> Option<Atom> {
|
|
debug!("ServoThreadSafeLayoutElement::imported_part called");
|
|
None
|
|
}
|
|
|
|
fn has_class(&self, _name: &Atom, _case_sensitivity: CaseSensitivity) -> bool {
|
|
debug!("ServoThreadSafeLayoutElement::has_class called");
|
|
false
|
|
}
|
|
|
|
fn is_empty(&self) -> bool {
|
|
warn!("ServoThreadSafeLayoutElement::is_empty called");
|
|
false
|
|
}
|
|
|
|
fn is_root(&self) -> bool {
|
|
warn!("ServoThreadSafeLayoutElement::is_root called");
|
|
false
|
|
}
|
|
}
|