diff options
Diffstat (limited to 'components/layout/wrapper.rs')
| -rw-r--r-- | components/layout/wrapper.rs | 970 |
1 files changed, 5 insertions, 965 deletions
diff --git a/components/layout/wrapper.rs b/components/layout/wrapper.rs index b41621da81b..a7949fc75b1 100644 --- a/components/layout/wrapper.rs +++ b/components/layout/wrapper.rs @@ -32,40 +32,13 @@ use core::nonzero::NonZero; use data::{LayoutDataFlags, PrivateLayoutData}; -use gfx::display_list::OpaqueNode; -use gfx::text::glyph::ByteIndex; -use msg::constellation_msg::PipelineId; -use range::Range; -use script::layout_interface::{CAN_BE_FRAGMENTED, HAS_CHANGED, HAS_DIRTY_DESCENDANTS, IS_DIRTY}; -use script::layout_interface::{CharacterDataTypeId, Document, Element, ElementTypeId}; -use script::layout_interface::{HTMLElementTypeId, LayoutCharacterDataHelpers}; -use script::layout_interface::{LayoutDocumentHelpers, LayoutElementHelpers, LayoutJS}; -use script::layout_interface::{LayoutNodeHelpers, Node, NodeTypeId}; -use script::layout_interface::{RawLayoutElementHelpers, Text, TrustedNodeAddress}; -use script_layout_interface::restyle_damage::RestyleDamage; -use script_layout_interface::wrapper_traits::{DangerousThreadSafeLayoutNode, LayoutNode, PseudoElementType}; -use script_layout_interface::wrapper_traits::{ThreadSafeLayoutNode, ThreadSafeLayoutElement}; -use script_layout_interface::{HTMLCanvasData, LayoutNodeType}; +use script_layout_interface::wrapper_traits::{LayoutNode, ThreadSafeLayoutNode}; use script_layout_interface::{OpaqueStyleAndLayoutData, PartialStyleAndLayoutData}; -use selectors::matching::{DeclarationBlock, ElementFlags}; -use selectors::parser::{AttrSelector, NamespaceConstraint}; -use smallvec::VecLike; use std::cell::{Ref, RefCell, RefMut}; -use std::marker::PhantomData; -use std::mem::{transmute, transmute_copy}; -use string_cache::{Atom, BorrowedAtom, BorrowedNamespace, Namespace}; -use style::attr::AttrValue; -use style::computed_values::content::ContentItem; -use style::computed_values::{content, display}; -use style::dom::{PresentationalHintsSynthetizer, TDocument, TElement, TNode, UnsafeNode}; -use style::element_state::*; -use style::properties::{ComputedValues, ServoComputedValues}; -use style::properties::{PropertyDeclaration, PropertyDeclarationBlock}; -use style::restyle_hints::ElementSnapshot; -use style::selector_impl::{NonTSPseudoClass, ServoSelectorImpl}; -use style::servo::{PrivateStyleData, SharedStyleContext}; -use url::Url; -use util::str::is_whitespace; +use style::computed_values::content::{self, ContentItem}; +use style::properties::ComputedValues; + +pub use script::layout_wrapper::*; pub type NonOpaqueStyleAndLayoutData = *mut RefCell<PrivateLayoutData>; @@ -79,230 +52,6 @@ pub trait LayoutNodeLayoutData { fn flow_debug_id(self) -> usize; } -#[derive(Copy, Clone)] -pub struct ServoLayoutNode<'a> { - /// The wrapped node. - node: LayoutJS<Node>, - - /// Being chained to a PhantomData prevents `LayoutNode`s from escaping. - chain: PhantomData<&'a ()>, -} - -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: LayoutJS<Node>) -> ServoLayoutNode<'ln> { - ServoLayoutNode { - node: n, - chain: PhantomData, - } - } - - pub unsafe fn new(address: &TrustedNodeAddress) -> ServoLayoutNode { - ServoLayoutNode::from_layout_js(LayoutJS::from_trusted_node_address(*address)) - } - - /// Creates a new layout node with the same lifetime as this layout node. - pub unsafe fn new_with_this_lifetime(&self, node: &LayoutJS<Node>) -> ServoLayoutNode<'ln> { - ServoLayoutNode { - node: *node, - chain: self.chain, - } - } - - fn script_type_id(&self) -> NodeTypeId { - unsafe { - self.node.type_id_for_layout() - } - } -} - -impl<'ln> TNode for ServoLayoutNode<'ln> { - type ConcreteComputedValues = ServoComputedValues; - type ConcreteElement = ServoLayoutElement<'ln>; - type ConcreteDocument = ServoLayoutDocument<'ln>; - type ConcreteRestyleDamage = RestyleDamage; - - fn to_unsafe(&self) -> UnsafeNode { - unsafe { - let ptr: usize = transmute_copy(self); - (ptr, 0) - } - } - - unsafe fn from_unsafe(n: &UnsafeNode) -> Self { - let (node, _) = *n; - transmute(node) - } - - fn is_text_node(&self) -> bool { - self.script_type_id() == NodeTypeId::CharacterData(CharacterDataTypeId::Text) - } - - fn is_element(&self) -> bool { - unsafe { - self.node.is_element_for_layout() - } - } - - fn dump(self) { - self.dump_indent(0); - } - - fn opaque(&self) -> OpaqueNode { - unsafe { self.get_jsmanaged().opaque() } - } - - fn layout_parent_node(self, reflow_root: OpaqueNode) -> Option<ServoLayoutNode<'ln>> { - if self.opaque() == reflow_root { - None - } else { - self.parent_node() - } - } - - fn debug_id(self) -> usize { - self.opaque().0 - } - - fn children_count(&self) -> u32 { - unsafe { self.node.children_count() } - } - - 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 has_changed(&self) -> bool { - unsafe { self.node.get_flag(HAS_CHANGED) } - } - - unsafe fn set_changed(&self, value: bool) { - self.node.set_flag(HAS_CHANGED, value) - } - - fn is_dirty(&self) -> bool { - unsafe { self.node.get_flag(IS_DIRTY) } - } - - unsafe fn set_dirty(&self, value: bool) { - self.node.set_flag(IS_DIRTY, value) - } - - fn has_dirty_descendants(&self) -> bool { - unsafe { self.node.get_flag(HAS_DIRTY_DESCENDANTS) } - } - - unsafe fn set_dirty_descendants(&self, value: bool) { - self.node.set_flag(HAS_DIRTY_DESCENDANTS, value) - } - - fn can_be_fragmented(&self) -> bool { - unsafe { self.node.get_flag(CAN_BE_FRAGMENTED) } - } - - unsafe fn set_can_be_fragmented(&self, value: bool) { - self.node.set_flag(CAN_BE_FRAGMENTED, value) - } - - unsafe fn borrow_data_unchecked(&self) -> Option<*const PrivateStyleData> { - self.get_style_data().map(|d| { - &(*d.as_unsafe_cell().get()).style_data as *const _ - }) - } - - fn borrow_data(&self) -> Option<Ref<PrivateStyleData>> { - self.get_style_data().map(|d| { - Ref::map(d.borrow(), |d| &d.style_data) - }) - } - - fn mutate_data(&self) -> Option<RefMut<PrivateStyleData>> { - self.get_style_data().map(|d| { - RefMut::map(d.borrow_mut(), |d| &mut d.style_data) - }) - } - - fn restyle_damage(self) -> RestyleDamage { - self.get_style_data().unwrap().borrow().restyle_damage - } - - fn set_restyle_damage(self, damage: RestyleDamage) { - self.get_style_data().unwrap().borrow_mut().restyle_damage = damage; - } - - fn parent_node(&self) -> Option<ServoLayoutNode<'ln>> { - unsafe { - self.node.parent_node_ref().map(|node| self.new_with_this_lifetime(&node)) - } - } - - fn first_child(&self) -> Option<ServoLayoutNode<'ln>> { - unsafe { - self.node.first_child_ref().map(|node| self.new_with_this_lifetime(&node)) - } - } - - fn last_child(&self) -> Option<ServoLayoutNode<'ln>> { - unsafe { - self.node.last_child_ref().map(|node| self.new_with_this_lifetime(&node)) - } - } - - fn prev_sibling(&self) -> Option<ServoLayoutNode<'ln>> { - unsafe { - self.node.prev_sibling_ref().map(|node| self.new_with_this_lifetime(&node)) - } - } - - fn next_sibling(&self) -> Option<ServoLayoutNode<'ln>> { - unsafe { - self.node.next_sibling_ref().map(|node| self.new_with_this_lifetime(&node)) - } - } -} - -impl<'ln> LayoutNode 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() - } - - fn get_style_data(&self) -> Option<&RefCell<PartialStyleAndLayoutData>> { - unsafe { - self.get_jsmanaged().get_style_and_layout_data().map(|d| { - &**d.ptr - }) - } - } - - fn init_style_and_layout_data(&self, data: OpaqueStyleAndLayoutData) { - unsafe { - self.get_jsmanaged().init_style_and_layout_data(data); - } - } - - fn get_style_and_layout_data(&self) -> Option<OpaqueStyleAndLayoutData> { - unsafe { - self.get_jsmanaged().get_style_and_layout_data() - } - } -} - impl<T: LayoutNode> LayoutNodeLayoutData for T { unsafe fn borrow_layout_data_unchecked(&self) -> Option<*const PrivateLayoutData> { self.get_style_and_layout_data().map(|opaque| { @@ -345,294 +94,6 @@ impl<T: LayoutNode> LayoutNodeLayoutData for T { } } - -impl<'ln> ServoLayoutNode<'ln> { - fn dump_indent(self, indent: u32) { - let mut s = String::new(); - for _ in 0..indent { - s.push_str(" "); - } - - s.push_str(&self.debug_str()); - println!("{}", s); - - for kid in self.children() { - kid.dump_indent(indent + 1); - } - } - - fn debug_str(self) -> String { - format!("{:?}: changed={} dirty={} dirty_descendants={}", - self.script_type_id(), self.has_changed(), self.is_dirty(), self.has_dirty_descendants()) - } - - /// Returns the interior of this node as a `LayoutJS`. This is highly unsafe for layout to - /// call and as such is marked `unsafe`. - unsafe fn get_jsmanaged(&self) -> &LayoutJS<Node> { - &self.node - } -} - -// A wrapper around documents that ensures ayout can only ever access safe properties. -#[derive(Copy, Clone)] -pub struct ServoLayoutDocument<'ld> { - document: LayoutJS<Document>, - chain: PhantomData<&'ld ()>, -} - -impl<'ld> TDocument for ServoLayoutDocument<'ld> { - type ConcreteNode = ServoLayoutNode<'ld>; - type ConcreteElement = ServoLayoutElement<'ld>; - - fn as_node(&self) -> ServoLayoutNode<'ld> { - ServoLayoutNode::from_layout_js(self.document.upcast()) - } - - fn root_node(&self) -> Option<ServoLayoutNode<'ld>> { - self.as_node().children().find(ServoLayoutNode::is_element) - } - - fn drain_modified_elements(&self) -> Vec<(ServoLayoutElement<'ld>, ElementSnapshot)> { - let elements = unsafe { self.document.drain_modified_elements() }; - elements.into_iter().map(|(el, snapshot)| (ServoLayoutElement::from_layout_js(el), snapshot)).collect() - } -} - -impl<'ld> ServoLayoutDocument<'ld> { - fn from_layout_js(doc: LayoutJS<Document>) -> ServoLayoutDocument<'ld> { - ServoLayoutDocument { - document: doc, - chain: PhantomData, - } - } -} - -/// A wrapper around elements that ensures layout can only ever access safe properties. -#[derive(Copy, Clone)] -pub struct ServoLayoutElement<'le> { - element: LayoutJS<Element>, - chain: PhantomData<&'le ()>, -} - -impl<'le> PresentationalHintsSynthetizer for ServoLayoutElement<'le> { - fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, hints: &mut V) - where V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>> - { - unsafe { - self.element.synthesize_presentational_hints_for_legacy_attributes(hints); - } - } -} - -impl<'le> TElement for ServoLayoutElement<'le> { - type ConcreteNode = ServoLayoutNode<'le>; - type ConcreteDocument = ServoLayoutDocument<'le>; - - fn as_node(&self) -> ServoLayoutNode<'le> { - ServoLayoutNode::from_layout_js(self.element.upcast()) - } - - fn style_attribute(&self) -> &Option<PropertyDeclarationBlock> { - unsafe { - &*self.element.style_attribute() - } - } - - fn get_state(&self) -> ElementState { - self.element.get_state_for_layout() - } - - #[inline] - fn get_attr(&self, namespace: &Namespace, name: &Atom) -> Option<&str> { - unsafe { - (*self.element.unsafe_get()).get_attr_val_for_layout(namespace, name) - } - } - - #[inline] - fn get_attrs(&self, name: &Atom) -> Vec<&str> { - unsafe { - (*self.element.unsafe_get()).get_attr_vals_for_layout(name) - } - } -} - - -impl<'le> ServoLayoutElement<'le> { - fn from_layout_js(el: LayoutJS<Element>) -> ServoLayoutElement<'le> { - ServoLayoutElement { - element: el, - chain: PhantomData, - } - } -} - -fn as_element<'le>(node: LayoutJS<Node>) -> Option<ServoLayoutElement<'le>> { - node.downcast().map(ServoLayoutElement::from_layout_js) -} - -impl<'le> ::selectors::Element for ServoLayoutElement<'le> { - type Impl = ServoSelectorImpl; - - fn parent_element(&self) -> Option<ServoLayoutElement<'le>> { - unsafe { - self.element.upcast().parent_node_ref().and_then(as_element) - } - } - - fn first_child_element(&self) -> Option<ServoLayoutElement<'le>> { - self.as_node().children().filter_map(|n| n.as_element()).next() - } - - fn last_child_element(&self) -> Option<ServoLayoutElement<'le>> { - self.as_node().rev_children().filter_map(|n| n.as_element()).next() - } - - 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 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().children().all(|node| match node.script_type_id() { - NodeTypeId::Element(..) => false, - NodeTypeId::CharacterData(CharacterDataTypeId::Text) => unsafe { - node.node.downcast().unwrap().data_for_layout().is_empty() - }, - _ => true - }) - } - - #[inline] - fn get_local_name<'a>(&'a self) -> BorrowedAtom<'a> { - BorrowedAtom(self.element.local_name()) - } - - #[inline] - fn get_namespace<'a>(&'a self) -> BorrowedNamespace<'a> { - BorrowedNamespace(self.element.namespace()) - } - - fn match_non_ts_pseudo_class(&self, pseudo_class: NonTSPseudoClass) -> bool { - match pseudo_class { - // https://github.com/servo/servo/issues/8718 - NonTSPseudoClass::Link | - NonTSPseudoClass::AnyLink => unsafe { - 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.unsafe_get()).get_attr_val_for_layout(&ns!(), &atom!("href")).is_some(), - _ => false, - } - }, - NonTSPseudoClass::Visited => false, - - NonTSPseudoClass::ServoNonZeroBorder => unsafe { - match (*self.element.unsafe_get()).get_attr_for_layout(&ns!(), &atom!("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::Hover | - NonTSPseudoClass::Enabled | - NonTSPseudoClass::Disabled | - NonTSPseudoClass::Checked | - NonTSPseudoClass::Indeterminate | - NonTSPseudoClass::ReadWrite | - NonTSPseudoClass::PlaceholderShown => - self.element.get_state_for_layout().contains(pseudo_class.state_flag()) - } - } - - #[inline] - fn get_id(&self) -> Option<Atom> { - unsafe { - (*self.element.id_attribute()).clone() - } - } - - #[inline] - fn has_class(&self, name: &Atom) -> bool { - unsafe { - self.element.has_class_for_layout(name) - } - } - - #[inline(always)] - fn each_class<F>(&self, mut callback: F) where F: FnMut(&Atom) { - unsafe { - if let Some(ref classes) = self.element.get_classes_for_layout() { - for class in *classes { - callback(class) - } - } - } - } - - fn match_attr<F>(&self, attr: &AttrSelector, test: F) -> bool where F: Fn(&str) -> bool { - let name = if self.is_html_element_in_html_document() { - &attr.lower_name - } else { - &attr.name - }; - match attr.namespace { - NamespaceConstraint::Specific(ref ns) => { - self.get_attr(ns, name).map_or(false, |attr| test(attr)) - }, - NamespaceConstraint::Any => { - self.get_attrs(name).iter().any(|attr| test(*attr)) - } - } - } - - fn is_html_element_in_html_document(&self) -> bool { - unsafe { - self.element.html_element_in_html_document_for_layout() - } - } - - fn insert_flags(&self, flags: ElementFlags) { - self.element.insert_atomic_flags(flags); - } -} - pub trait ThreadSafeLayoutNodeHelpers { fn flow_debug_id(self) -> usize; @@ -666,190 +127,6 @@ pub trait ThreadSafeLayoutNodeHelpers { fn text_content(&self) -> TextContent; } -#[derive(Copy, Clone)] -pub struct ServoThreadSafeLayoutNode<'ln> { - /// The wrapped node. - node: ServoLayoutNode<'ln>, - - /// The pseudo-element type, with (optionally), - /// an specified display value to override the stylesheet. - pseudo: PseudoElementType<Option<display::T>>, -} - -impl<'a> PartialEq for ServoThreadSafeLayoutNode<'a> { - #[inline] - fn eq(&self, other: &ServoThreadSafeLayoutNode<'a>) -> bool { - self.node == other.node - } -} - -impl<'ln> DangerousThreadSafeLayoutNode for ServoThreadSafeLayoutNode<'ln> { - unsafe fn dangerous_first_child(&self) -> Option<Self> { - self.get_jsmanaged().first_child_ref() - .map(|node| self.new_with_this_lifetime(&node)) - } - unsafe fn dangerous_next_sibling(&self) -> Option<Self> { - self.get_jsmanaged().next_sibling_ref() - .map(|node| self.new_with_this_lifetime(&node)) - } -} - -impl<'ln> ServoThreadSafeLayoutNode<'ln> { - /// Creates a new layout node with the same lifetime as this layout node. - pub unsafe fn new_with_this_lifetime(&self, node: &LayoutJS<Node>) -> ServoThreadSafeLayoutNode<'ln> { - ServoThreadSafeLayoutNode { - node: self.node.new_with_this_lifetime(node), - pseudo: PseudoElementType::Normal, - } - } - - /// Creates a new `ServoThreadSafeLayoutNode` from the given `ServoLayoutNode`. - pub fn new<'a>(node: &ServoLayoutNode<'a>) -> ServoThreadSafeLayoutNode<'a> { - ServoThreadSafeLayoutNode { - node: node.clone(), - pseudo: PseudoElementType::Normal, - } - } - - /// Returns the interior of this node as a `LayoutJS`. This is highly unsafe for layout to - /// call and as such is marked `unsafe`. - unsafe fn get_jsmanaged(&self) -> &LayoutJS<Node> { - self.node.get_jsmanaged() - } -} - -impl<'ln> ThreadSafeLayoutNode for ServoThreadSafeLayoutNode<'ln> { - type ConcreteThreadSafeLayoutElement = ServoThreadSafeLayoutElement<'ln>; - type ChildrenIterator = ThreadSafeLayoutNodeChildrenIterator<Self>; - - fn with_pseudo(&self, - pseudo: PseudoElementType<Option<display::T>>) -> ServoThreadSafeLayoutNode<'ln> { - ServoThreadSafeLayoutNode { - node: self.node.clone(), - pseudo: pseudo, - } - } - - fn opaque(&self) -> OpaqueNode { - unsafe { self.get_jsmanaged().opaque() } - } - - fn type_id(&self) -> Option<LayoutNodeType> { - if self.pseudo != PseudoElementType::Normal { - return None - } - - Some(self.node.type_id()) - } - - #[inline] - fn type_id_without_excluding_pseudo_elements(&self) -> LayoutNodeType { - self.node.type_id() - } - - fn debug_id(self) -> usize { - self.node.debug_id() - } - - fn children(&self) -> Self::ChildrenIterator { - ThreadSafeLayoutNodeChildrenIterator::new(*self) - } - - fn as_element(&self) -> ServoThreadSafeLayoutElement<'ln> { - unsafe { - let element = match self.get_jsmanaged().downcast() { - Some(e) => e.unsafe_get(), - None => panic!("not an element") - }; - // FIXME(pcwalton): Workaround until Rust gets multiple lifetime parameters on - // implementations. - ServoThreadSafeLayoutElement { - element: &*element, - } - } - } - - fn get_pseudo_element_type(&self) -> PseudoElementType<Option<display::T>> { - self.pseudo - } - - fn get_style_and_layout_data(&self) -> Option<OpaqueStyleAndLayoutData> { - self.node.get_style_and_layout_data() - } - - fn is_ignorable_whitespace(&self, context: &SharedStyleContext) -> bool { - unsafe { - let text: LayoutJS<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_inheritedtext().white_space.preserve_newlines() - } - } - - fn restyle_damage(self) -> RestyleDamage { - self.node.restyle_damage() - } - - fn set_restyle_damage(self, damage: RestyleDamage) { - self.node.set_restyle_damage(damage) - } - - fn can_be_fragmented(&self) -> bool { - self.node.can_be_fragmented() - } - - fn node_text_content(&self) -> String { - let this = unsafe { self.get_jsmanaged() }; - return this.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<Url> { - let this = unsafe { self.get_jsmanaged() }; - this.image_url() - } - - fn canvas_data(&self) -> Option<HTMLCanvasData> { - let this = unsafe { self.get_jsmanaged() }; - this.canvas_data() - } - - fn iframe_pipeline_id(&self) -> 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_style_data(&self) -> Option<&RefCell<PartialStyleAndLayoutData>> { - self.node.get_style_data() - } -} - impl<T: ThreadSafeLayoutNode> ThreadSafeLayoutNodeHelpers for T { fn flow_debug_id(self) -> usize { self.borrow_layout_data().map_or(0, |d| d.flow_construction_result.debug_id()) @@ -910,133 +187,6 @@ impl<T: ThreadSafeLayoutNode> ThreadSafeLayoutNodeHelpers for T { } } -pub struct ThreadSafeLayoutNodeChildrenIterator<ConcreteNode: ThreadSafeLayoutNode> { - current_node: Option<ConcreteNode>, - parent_node: ConcreteNode, -} - -impl<ConcreteNode> ThreadSafeLayoutNodeChildrenIterator<ConcreteNode> - where ConcreteNode: DangerousThreadSafeLayoutNode { - 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<ConcreteNode> Iterator for ThreadSafeLayoutNodeChildrenIterator<ConcreteNode> - where ConcreteNode: DangerousThreadSafeLayoutNode { - type Item = ConcreteNode; - fn next(&mut self) -> Option<ConcreteNode> { - 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 node.is_element() && - node.as_element().get_local_name() == atom!("summary") && - node.as_element().get_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().get_local_name() == atom!("summary") && - node.as_element().get_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(_) => { - let first = self.parent_node.get_details_summary_pseudo().or_else(|| unsafe { - self.parent_node.dangerous_first_child() - }); - match first { - Some(first) => Some(first), - None => self.parent_node.get_after_pseudo(), - } - }, - PseudoElementType::Normal => { - match unsafe { node.dangerous_next_sibling() } { - Some(next) => Some(next), - None => 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(Copy, Clone)] -pub struct ServoThreadSafeLayoutElement<'le> { - element: &'le Element, -} - -impl<'le> ThreadSafeLayoutElement for ServoThreadSafeLayoutElement<'le> { - type ConcreteThreadSafeLayoutNode = ServoThreadSafeLayoutNode<'le>; - - fn get_attr<'a>(&'a self, namespace: &Namespace, name: &Atom) -> Option<&'a str> { - unsafe { - self.element.get_attr_val_for_layout(namespace, name) - } - } - - #[inline] - fn get_local_name<'a>(&'a self) -> BorrowedAtom<'a> { - BorrowedAtom(self.element.local_name()) - } - - #[inline] - fn get_namespace<'a>(&'a self) -> BorrowedNamespace<'a> { - BorrowedNamespace(self.element.namespace()) - } -} - pub enum TextContent { Text(String), GeneratedContent(Vec<ContentItem>), @@ -1050,113 +200,3 @@ impl TextContent { } } } - -/// 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`, -/// `each_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 = ServoSelectorImpl; - - fn parent_element(&self) -> Option<Self> { - warn!("ServoThreadSafeLayoutElement::parent_element called"); - None - } - - fn first_child_element(&self) -> Option<Self> { - warn!("ServoThreadSafeLayoutElement::first_child_element called"); - None - } - - // Skips non-element nodes - fn last_child_element(&self) -> Option<Self> { - warn!("ServoThreadSafeLayoutElement::last_child_element called"); - 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_element_in_html_document(&self) -> bool { - debug!("ServoThreadSafeLayoutElement::is_html_element_in_html_document called"); - true - } - - #[inline] - fn get_local_name<'a>(&'a self) -> BorrowedAtom<'a> { - ThreadSafeLayoutElement::get_local_name(self) - } - - #[inline] - fn get_namespace<'a>(&'a self) -> BorrowedNamespace<'a> { - ThreadSafeLayoutElement::get_namespace(self) - } - - fn match_non_ts_pseudo_class(&self, _: NonTSPseudoClass) -> bool { - // NB: This could maybe be implemented - warn!("ServoThreadSafeLayoutElement::match_non_ts_pseudo_class called"); - false - } - - fn get_id(&self) -> Option<Atom> { - debug!("ServoThreadSafeLayoutElement::get_id called"); - None - } - - fn has_class(&self, _name: &Atom) -> bool { - debug!("ServoThreadSafeLayoutElement::has_class called"); - false - } - - fn match_attr<F>(&self, attr: &AttrSelector, test: F) -> bool - where F: Fn(&str) -> bool { - match attr.namespace { - NamespaceConstraint::Specific(ref ns) => { - self.get_attr(ns, &attr.name).map_or(false, |attr| test(attr)) - }, - NamespaceConstraint::Any => { - unsafe { - self.element.get_attr_vals_for_layout(&attr.name).iter() - .any(|attr| test(*attr)) - } - } - } - } - - fn is_empty(&self) -> bool { - warn!("ServoThreadSafeLayoutElement::is_empty called"); - false - } - - fn is_root(&self) -> bool { - warn!("ServoThreadSafeLayoutElement::is_root called"); - false - } - - fn each_class<F>(&self, _callback: F) - where F: FnMut(&Atom) { - warn!("ServoThreadSafeLayoutElement::each_class called"); - } -} - -impl<'le> PresentationalHintsSynthetizer for ServoThreadSafeLayoutElement<'le> { - fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, _hints: &mut V) - where V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>> {} -} |