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Generalize the rest of layout to operate on generic Layout*.

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There wasn't a good way to split this up, unfortunately.

With this change, the only remaining usage of the Servo-specific structures is
in layout_task, where the root node is received from the script task. \o/
This commit is contained in:
Bobby Holley 2015-11-20 09:51:05 -08:00
parent 77a8091996
commit cf33f00018
10 changed files with 198 additions and 156 deletions
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87
components/layout/construct.rs
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@ -38,6 +38,7 @@ use script::dom::bindings::inheritance::{HTMLElementTypeId, NodeTypeId};
use script::dom::htmlobjectelement::is_image_data;
use std::borrow::ToOwned;
use std::collections::LinkedList;
use std::marker::PhantomData;
use std::mem;
use std::sync::Arc;
use std::sync::atomic::Ordering;
@ -57,7 +58,7 @@ use traversal::PostorderNodeMutTraversal;
use url::Url;
use util::linked_list;
use util::opts;
use wrapper::{PseudoElementType, ServoThreadSafeLayoutNode, TextContent, ThreadSafeLayoutElement, ThreadSafeLayoutNode};
use wrapper::{PseudoElementType, TextContent, ThreadSafeLayoutElement, ThreadSafeLayoutNode};
/// The results of flow construction for a DOM node.
#[derive(Clone)]
@ -208,7 +209,8 @@ impl InlineFragmentsAccumulator {
}
}
fn from_inline_node(node: &ServoThreadSafeLayoutNode) -> InlineFragmentsAccumulator {
fn from_inline_node<'ln, N>(node: &N) -> InlineFragmentsAccumulator
where N: ThreadSafeLayoutNode<'ln> {
InlineFragmentsAccumulator {
fragments: IntermediateInlineFragments::new(),
enclosing_node: Some(InlineFragmentNodeInfo {
@ -265,29 +267,35 @@ impl InlineFragmentsAccumulator {
}
/// An object that knows how to create flows.
pub struct FlowConstructor<'a> {
pub struct FlowConstructor<'a, 'ln, N: ThreadSafeLayoutNode<'ln>> {
/// The layout context.
pub layout_context: &'a LayoutContext<'a>,
/// Satisfy the compiler about the unused parameters, which we use to improve the ergonomics of
/// the ensuing impl {} by removing the need to parameterize all the methods individually.
phantom1: PhantomData<&'ln ()>,
phantom2: PhantomData<N>,
}
impl<'a> FlowConstructor<'a> {
impl<'a, 'ln, ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode<'ln>>
FlowConstructor<'a, 'ln, ConcreteThreadSafeLayoutNode> {
/// Creates a new flow constructor.
pub fn new<'b>(layout_context: &'b LayoutContext<'b>)
-> FlowConstructor<'b> {
pub fn new(layout_context: &'a LayoutContext<'a>) -> Self {
FlowConstructor {
layout_context: layout_context,
phantom1: PhantomData,
phantom2: PhantomData,
}
}
#[inline]
fn set_flow_construction_result(&self,
node: &ServoThreadSafeLayoutNode,
node: &ConcreteThreadSafeLayoutNode,
result: ConstructionResult) {
node.set_flow_construction_result(result);
}
/// Builds the fragment for the given block or subclass thereof.
fn build_fragment_for_block(&mut self, node: &ServoThreadSafeLayoutNode) -> Fragment {
fn build_fragment_for_block(&mut self, node: &ConcreteThreadSafeLayoutNode) -> Fragment {
let specific_fragment_info = match node.type_id() {
Some(NodeTypeId::Element(ElementTypeId::HTMLElement(
HTMLElementTypeId::HTMLIFrameElement))) => {
@ -343,7 +351,7 @@ impl<'a> FlowConstructor<'a> {
fn generate_anonymous_table_flows_if_necessary(&mut self,
flow: &mut FlowRef,
child: &mut FlowRef,
child_node: &ServoThreadSafeLayoutNode) {
child_node: &ConcreteThreadSafeLayoutNode) {
if !flow.is_block_flow() {
return
}
@ -401,7 +409,7 @@ impl<'a> FlowConstructor<'a> {
flow: &mut FlowRef,
flow_list: &mut Vec<FlowRef>,
absolute_descendants: &mut AbsoluteDescendants,
node: &ServoThreadSafeLayoutNode) {
node: &ConcreteThreadSafeLayoutNode) {
let mut fragments = fragment_accumulator.to_intermediate_inline_fragments();
if fragments.is_empty() {
return
@ -486,8 +494,8 @@ impl<'a> FlowConstructor<'a> {
&mut self,
flow: &mut FlowRef,
consecutive_siblings: &mut Vec<FlowRef>,
node: &ServoThreadSafeLayoutNode,
kid: ServoThreadSafeLayoutNode,
node: &ConcreteThreadSafeLayoutNode,
kid: ConcreteThreadSafeLayoutNode,
inline_fragment_accumulator: &mut InlineFragmentsAccumulator,
abs_descendants: &mut AbsoluteDescendants) {
match kid.swap_out_construction_result() {
@ -595,7 +603,7 @@ impl<'a> FlowConstructor<'a> {
fn build_flow_for_block_starting_with_fragments(
&mut self,
mut flow: FlowRef,
node: &ServoThreadSafeLayoutNode,
node: &ConcreteThreadSafeLayoutNode,
initial_fragments: IntermediateInlineFragments)
-> ConstructionResult {
// Gather up fragments for the inline flows we might need to create.
@ -662,7 +670,7 @@ impl<'a> FlowConstructor<'a> {
///
/// FIXME(pcwalton): It is not clear to me that there isn't a cleaner way to handle
/// `<textarea>`.
fn build_flow_for_block_like(&mut self, flow: FlowRef, node: &ServoThreadSafeLayoutNode)
fn build_flow_for_block_like(&mut self, flow: FlowRef, node: &ConcreteThreadSafeLayoutNode)
-> ConstructionResult {
let mut initial_fragments = IntermediateInlineFragments::new();
let node_is_input_or_text_area =
@ -695,7 +703,7 @@ impl<'a> FlowConstructor<'a> {
/// Pushes fragments appropriate for the content of the given node onto the given list.
fn create_fragments_for_node_text_content(&self,
fragments: &mut IntermediateInlineFragments,
node: &ServoThreadSafeLayoutNode,
node: &ConcreteThreadSafeLayoutNode,
style: &Arc<ComputedValues>) {
// Fast path: If there is no text content, return immediately.
let text_content = node.text_content();
@ -744,7 +752,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds a flow for a node with `display: block`. This yields a `BlockFlow` with possibly
/// other `BlockFlow`s or `InlineFlow`s underneath it, depending on whether {ib} splits needed
/// to happen.
fn build_flow_for_block(&mut self, node: &ServoThreadSafeLayoutNode, float_kind: Option<FloatKind>)
fn build_flow_for_block(&mut self, node: &ConcreteThreadSafeLayoutNode, float_kind: Option<FloatKind>)
-> ConstructionResult {
let fragment = self.build_fragment_for_block(node);
let flow: FlowRef = if node.style().is_multicol() {
@ -758,7 +766,7 @@ impl<'a> FlowConstructor<'a> {
/// Bubbles up {ib} splits.
fn accumulate_inline_block_splits(&mut self,
splits: LinkedList<InlineBlockSplit>,
node: &ServoThreadSafeLayoutNode,
node: &ConcreteThreadSafeLayoutNode,
fragment_accumulator: &mut InlineFragmentsAccumulator,
opt_inline_block_splits: &mut LinkedList<InlineBlockSplit>) {
for split in splits {
@ -783,7 +791,7 @@ impl<'a> FlowConstructor<'a> {
/// Returns the `InlineFragmentsConstructionResult`, if any. There will be no
/// `InlineFragmentsConstructionResult` if this node consisted entirely of ignorable
/// whitespace.
fn build_fragments_for_nonreplaced_inline_content(&mut self, node: &ServoThreadSafeLayoutNode)
fn build_fragments_for_nonreplaced_inline_content(&mut self, node: &ConcreteThreadSafeLayoutNode)
-> ConstructionResult {
let mut opt_inline_block_splits: LinkedList<InlineBlockSplit> = LinkedList::new();
let mut fragment_accumulator = InlineFragmentsAccumulator::from_inline_node(node);
@ -897,7 +905,7 @@ impl<'a> FlowConstructor<'a> {
/// Creates an `InlineFragmentsConstructionResult` for replaced content. Replaced content
/// doesn't render its children, so this just nukes a child's fragments and creates a
/// `Fragment`.
fn build_fragments_for_replaced_inline_content(&mut self, node: &ServoThreadSafeLayoutNode)
fn build_fragments_for_replaced_inline_content(&mut self, node: &ConcreteThreadSafeLayoutNode)
-> ConstructionResult {
for kid in node.children() {
self.set_flow_construction_result(&kid, ConstructionResult::None)
@ -941,7 +949,7 @@ impl<'a> FlowConstructor<'a> {
ConstructionResult::ConstructionItem(construction_item)
}
fn build_fragment_for_inline_block(&mut self, node: &ServoThreadSafeLayoutNode)
fn build_fragment_for_inline_block(&mut self, node: &ConcreteThreadSafeLayoutNode)
-> ConstructionResult {
let block_flow_result = self.build_flow_for_block(node, None);
let (block_flow, abs_descendants) = match block_flow_result {
@ -973,7 +981,7 @@ impl<'a> FlowConstructor<'a> {
/// This is an annoying case, because the computed `display` value is `block`, but the
/// hypothetical box is inline.
fn build_fragment_for_absolutely_positioned_inline(&mut self, node: &ServoThreadSafeLayoutNode)
fn build_fragment_for_absolutely_positioned_inline(&mut self, node: &ConcreteThreadSafeLayoutNode)
-> ConstructionResult {
let block_flow_result = self.build_flow_for_block(node, None);
let (block_flow, abs_descendants) = match block_flow_result {
@ -1005,7 +1013,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds one or more fragments for a node with `display: inline`. This yields an
/// `InlineFragmentsConstructionResult`.
fn build_fragments_for_inline(&mut self, node: &ServoThreadSafeLayoutNode) -> ConstructionResult {
fn build_fragments_for_inline(&mut self, node: &ConcreteThreadSafeLayoutNode) -> ConstructionResult {
// Is this node replaced content?
if !node.is_replaced_content() {
// Go to a path that concatenates our kids' fragments.
@ -1021,7 +1029,7 @@ impl<'a> FlowConstructor<'a> {
/// `caption-side` property is equal to the given `side`.
fn place_table_caption_under_table_wrapper_on_side(&mut self,
table_wrapper_flow: &mut FlowRef,
node: &ServoThreadSafeLayoutNode,
node: &ConcreteThreadSafeLayoutNode,
side: caption_side::T) {
// Only flows that are table captions are matched here.
for kid in node.children() {
@ -1046,7 +1054,7 @@ impl<'a> FlowConstructor<'a> {
fn generate_anonymous_missing_child(&mut self,
child_flows: Vec<FlowRef>,
flow: &mut FlowRef,
node: &ServoThreadSafeLayoutNode) {
node: &ConcreteThreadSafeLayoutNode) {
let mut anonymous_flow = flow.generate_missing_child_flow(node);
let mut consecutive_siblings = vec!();
for kid_flow in child_flows {
@ -1072,7 +1080,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds a flow for a node with `display: table`. This yields a `TableWrapperFlow` with
/// possibly other `TableCaptionFlow`s or `TableFlow`s underneath it.
fn build_flow_for_table_wrapper(&mut self, node: &ServoThreadSafeLayoutNode, float_value: float::T)
fn build_flow_for_table_wrapper(&mut self, node: &ConcreteThreadSafeLayoutNode, float_value: float::T)
-> ConstructionResult {
let fragment = Fragment::new(node, SpecificFragmentInfo::TableWrapper);
let mut wrapper_flow: FlowRef = Arc::new(
@ -1134,7 +1142,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds a flow for a node with `display: table-caption`. This yields a `TableCaptionFlow`
/// with possibly other `BlockFlow`s or `InlineFlow`s underneath it.
fn build_flow_for_table_caption(&mut self, node: &ServoThreadSafeLayoutNode) -> ConstructionResult {
fn build_flow_for_table_caption(&mut self, node: &ConcreteThreadSafeLayoutNode) -> ConstructionResult {
let fragment = self.build_fragment_for_block(node);
let flow = Arc::new(TableCaptionFlow::from_fragment(fragment));
self.build_flow_for_block_like(flow, node)
@ -1142,7 +1150,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds a flow for a node with `display: table-row-group`. This yields a `TableRowGroupFlow`
/// with possibly other `TableRowFlow`s underneath it.
fn build_flow_for_table_rowgroup(&mut self, node: &ServoThreadSafeLayoutNode)
fn build_flow_for_table_rowgroup(&mut self, node: &ConcreteThreadSafeLayoutNode)
-> ConstructionResult {
let fragment = Fragment::new(node, SpecificFragmentInfo::TableRow);
let flow = Arc::new(TableRowGroupFlow::from_fragment(fragment));
@ -1151,7 +1159,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds a flow for a node with `display: table-row`. This yields a `TableRowFlow` with
/// possibly other `TableCellFlow`s underneath it.
fn build_flow_for_table_row(&mut self, node: &ServoThreadSafeLayoutNode) -> ConstructionResult {
fn build_flow_for_table_row(&mut self, node: &ConcreteThreadSafeLayoutNode) -> ConstructionResult {
let fragment = Fragment::new(node, SpecificFragmentInfo::TableRow);
let flow = Arc::new(TableRowFlow::from_fragment(fragment));
self.build_flow_for_block_like(flow, node)
@ -1159,7 +1167,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds a flow for a node with `display: table-cell`. This yields a `TableCellFlow` with
/// possibly other `BlockFlow`s or `InlineFlow`s underneath it.
fn build_flow_for_table_cell(&mut self, node: &ServoThreadSafeLayoutNode) -> ConstructionResult {
fn build_flow_for_table_cell(&mut self, node: &ConcreteThreadSafeLayoutNode) -> ConstructionResult {
let fragment = Fragment::new(node, SpecificFragmentInfo::TableCell);
// Determine if the table cell should be hidden. Per CSS 2.1 § 17.6.1.1, this will be true
@ -1180,7 +1188,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds a flow for a node with `display: list-item`. This yields a `ListItemFlow` with
/// possibly other `BlockFlow`s or `InlineFlow`s underneath it.
fn build_flow_for_list_item(&mut self, node: &ServoThreadSafeLayoutNode, flotation: float::T)
fn build_flow_for_list_item(&mut self, node: &ConcreteThreadSafeLayoutNode, flotation: float::T)
-> ConstructionResult {
let flotation = FloatKind::from_property(flotation);
let marker_fragments = match node.style().get_list().list_style_image.0 {
@ -1239,7 +1247,7 @@ impl<'a> FlowConstructor<'a> {
}
/// Creates a fragment for a node with `display: table-column`.
fn build_fragments_for_table_column(&mut self, node: &ServoThreadSafeLayoutNode)
fn build_fragments_for_table_column(&mut self, node: &ConcreteThreadSafeLayoutNode)
-> ConstructionResult {
// CSS 2.1 § 17.2.1. Treat all child fragments of a `table-column` as `display: none`.
for kid in node.children() {
@ -1254,7 +1262,7 @@ impl<'a> FlowConstructor<'a> {
/// Builds a flow for a node with `display: table-column-group`.
/// This yields a `TableColGroupFlow`.
fn build_flow_for_table_colgroup(&mut self, node: &ServoThreadSafeLayoutNode)
fn build_flow_for_table_colgroup(&mut self, node: &ConcreteThreadSafeLayoutNode)
-> ConstructionResult {
let fragment =
Fragment::new(node,
@ -1283,7 +1291,7 @@ impl<'a> FlowConstructor<'a> {
}
/// Builds a flow for a node with 'display: flex'.
fn build_flow_for_flex(&mut self, node: &ServoThreadSafeLayoutNode, float_kind: Option<FloatKind>)
fn build_flow_for_flex(&mut self, node: &ConcreteThreadSafeLayoutNode, float_kind: Option<FloatKind>)
-> ConstructionResult {
let fragment = self.build_fragment_for_block(node);
let flow = Arc::new(FlexFlow::from_fragment(fragment, float_kind));
@ -1295,7 +1303,7 @@ impl<'a> FlowConstructor<'a> {
///
/// TODO(pcwalton): Add some more fast paths, like toggling `display: none`, adding block kids
/// to block parents with no {ib} splits, adding out-of-flow kids, etc.
pub fn repair_if_possible(&mut self, node: &ServoThreadSafeLayoutNode) -> bool {
pub fn repair_if_possible(&mut self, node: &ConcreteThreadSafeLayoutNode) -> bool {
// We can skip reconstructing the flow if we don't have to reconstruct and none of our kids
// did either.
//
@ -1403,14 +1411,16 @@ impl<'a> FlowConstructor<'a> {
}
}
impl<'a> PostorderNodeMutTraversal for FlowConstructor<'a> {
impl<'a, 'ln, ConcreteThreadSafeLayoutNode> PostorderNodeMutTraversal<'ln, ConcreteThreadSafeLayoutNode>
for FlowConstructor<'a, 'ln, ConcreteThreadSafeLayoutNode>
where ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode<'ln> {
// Construct Flow based on 'display', 'position', and 'float' values.
//
// CSS 2.1 Section 9.7
//
// TODO: This should actually consult the table in that section to get the
// final computed value for 'display'.
fn process(&mut self, node: &ServoThreadSafeLayoutNode) -> bool {
fn process(&mut self, node: &ConcreteThreadSafeLayoutNode) -> bool {
// Get the `display` property for this node, and determine whether this node is floated.
let (display, float, positioning) = match node.type_id() {
None => {
@ -1580,7 +1590,8 @@ trait NodeUtils {
fn swap_out_construction_result(self) -> ConstructionResult;
}
impl<'ln> NodeUtils for ServoThreadSafeLayoutNode<'ln> {
impl<'ln, ConcreteThreadSafeLayoutNode> NodeUtils for ConcreteThreadSafeLayoutNode
where ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode<'ln> {
fn is_replaced_content(&self) -> bool {
match self.type_id() {
None |
@ -1639,7 +1650,7 @@ trait ObjectElement<'a> {
fn object_data(&self) -> Option<Url>;
}
impl<'ln> ObjectElement<'ln> for ServoThreadSafeLayoutNode<'ln> {
impl<'ln, N> ObjectElement<'ln> for N where N: ThreadSafeLayoutNode<'ln> {
fn get_type_and_data(&self) -> (Option<&'ln str>, Option<&'ln str>) {
let elem = self.as_element();
(elem.get_attr(&ns!(), &atom!("type")), elem.get_attr(&ns!(), &atom!("data")))