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layout: Remove LayoutRPC and query layout via the Layout trait (#31937)

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Instead of the tricky `LayoutRPC` interface, query layout using the
`Layout` trait. This means that now queries will requires calling layout
and then running the query. During layout an enum is used to indicate
what kind of layout is necessary.

This change also removes the mutex-locked `rw_data` from both layout
threads. It's no longer necessary since layout runs synchronously. The
one downside here is that for resolved style queries, we now have to
create two StyleContexts. One for layout and one for the query itself.
The creation of this context should not be very expensive though.

`LayoutRPC` used to be necessary because layout used to run
asynchronously from script, but that no longer happens. With this
change, it becomes possible to safely pass nodes to layout from script
-- a cleanup that can happen in a followup change.
This commit is contained in:
Martin Robinson 2024-03-29 17:25:47 +01:00 • committed by GitHub
parent 07391e346b
commit b7d089930e
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GPG key ID: B5690EEEBB952194
12 changed files with 667 additions and 1174 deletions
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576
components/layout_thread/lib.rs
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@ -14,11 +14,11 @@ use std::collections::HashMap;
use std::ops::{Deref, DerefMut};
use std::process;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::{Arc, Mutex, MutexGuard};
use std::sync::{Arc, Mutex};
use app_units::Au;
use embedder_traits::resources::{self, Resource};
use euclid::default::Size2D as UntypedSize2D;
use euclid::default::{Point2D as UntypedPoint2D, Rect as UntypedRect, Size2D as UntypedSize2D};
use euclid::{Point2D, Rect, Scale, Size2D};
use fnv::FnvHashMap;
use fxhash::{FxHashMap, FxHashSet};
@ -32,7 +32,7 @@ use layout::construct::ConstructionResult;
use layout::context::{
malloc_size_of_persistent_local_context, LayoutContext, RegisteredPainter, RegisteredPainters,
};
use layout::display_list::items::WebRenderImageInfo;
use layout::display_list::items::{DisplayList, ScrollOffsetMap, WebRenderImageInfo};
use layout::display_list::{IndexableText, ToLayout};
use layout::flow::{Flow, FlowFlags, GetBaseFlow, ImmutableFlowUtils, MutableOwnedFlowUtils};
use layout::flow_ref::FlowRef;
@ -41,7 +41,7 @@ use layout::query::{
process_client_rect_query, process_content_box_request, process_content_boxes_request,
process_element_inner_text_query, process_node_scroll_id_request, process_offset_parent_query,
process_resolved_font_style_request, process_resolved_style_request,
process_scrolling_area_request, LayoutRPCImpl, LayoutThreadData,
process_scrolling_area_request,
};
use layout::traversal::{
construct_flows_at_ancestors, ComputeStackingRelativePositions, PreorderFlowTraversal,
@ -63,11 +63,12 @@ use profile_traits::time::{
};
use script::layout_dom::{ServoLayoutDocument, ServoLayoutElement, ServoLayoutNode};
use script_layout_interface::message::{
Msg, NodesFromPointQueryType, QueryMsg, Reflow, ReflowComplete, ReflowGoal, ScriptReflow,
Msg, NodesFromPointQueryType, Reflow, ReflowComplete, ReflowGoal, ScriptReflow,
};
use script_layout_interface::rpc::{LayoutRPC, OffsetParentResponse, TextIndexResponse};
use script_layout_interface::wrapper_traits::LayoutNode;
use script_layout_interface::{Layout, LayoutConfig, LayoutFactory};
use script_layout_interface::{
Layout, LayoutConfig, LayoutFactory, OffsetParentResponse, TrustedNodeAddress,
};
use script_traits::{
ConstellationControlMsg, DrawAPaintImageResult, IFrameSizeMsg, LayoutControlMsg,
LayoutMsg as ConstellationMsg, PaintWorkletError, Painter, ScrollState, UntrustedNodeAddress,
@ -81,13 +82,14 @@ use style::animation::{AnimationSetKey, DocumentAnimationSet, ElementAnimationSe
use style::context::{
QuirksMode, RegisteredSpeculativePainter, RegisteredSpeculativePainters, SharedStyleContext,
};
use style::dom::{ShowSubtree, ShowSubtreeDataAndPrimaryValues, TElement, TNode};
use style::dom::{OpaqueNode, ShowSubtree, ShowSubtreeDataAndPrimaryValues, TElement, TNode};
use style::driver;
use style::error_reporting::RustLogReporter;
use style::global_style_data::{GLOBAL_STYLE_DATA, STYLE_THREAD_POOL};
use style::invalidation::element::restyle_hints::RestyleHint;
use style::logical_geometry::LogicalPoint;
use style::media_queries::{Device, MediaList, MediaType};
use style::properties::style_structs::Font;
use style::properties::PropertyId;
use style::selector_parser::{PseudoElement, SnapshotMap};
use style::servo::restyle_damage::ServoRestyleDamage;
@ -158,11 +160,14 @@ pub struct LayoutThread {
/// constraints.
viewport_size: UntypedSize2D<Au>,
/// A mutex to allow for fast, read-only RPC of layout's internal data
/// structures, while still letting the LayoutThread modify them.
///
/// All the other elements of this struct are read-only.
rw_data: Arc<Mutex<LayoutThreadData>>,
/// The root stacking context.
display_list: RefCell<Option<DisplayList>>,
/// A map that stores all of the indexable text in this layout.
indexable_text: RefCell<IndexableText>,
/// Scroll offsets of scrolling regions.
scroll_offsets: RefCell<ScrollOffsetMap>,
webrender_image_cache: Arc<RwLock<FnvHashMap<(ServoUrl, UsePlaceholder), WebRenderImageInfo>>>,
@ -245,56 +250,6 @@ impl Drop for ScriptReflowResult {
}
}
/// The `LayoutThread` `rw_data` lock must remain locked until the first reflow,
/// as RPC calls don't make sense until then. Use this in combination with
/// `LayoutThread::lock_rw_data` and `LayoutThread::return_rw_data`.
pub enum RWGuard<'a> {
/// If the lock was previously held, from when the thread started.
Held(MutexGuard<'a, LayoutThreadData>),
/// If the lock was just used, and has been returned since there has been
/// a reflow already.
Used(MutexGuard<'a, LayoutThreadData>),
}
impl<'a> Deref for RWGuard<'a> {
type Target = LayoutThreadData;
fn deref(&self) -> &LayoutThreadData {
match *self {
RWGuard::Held(ref x) => &**x,
RWGuard::Used(ref x) => &**x,
}
}
}
impl<'a> DerefMut for RWGuard<'a> {
fn deref_mut(&mut self) -> &mut LayoutThreadData {
match *self {
RWGuard::Held(ref mut x) => &mut **x,
RWGuard::Used(ref mut x) => &mut **x,
}
}
}
struct RwData<'a, 'b: 'a> {
rw_data: &'b Arc<Mutex<LayoutThreadData>>,
possibly_locked_rw_data: &'a mut Option<MutexGuard<'b, LayoutThreadData>>,
}
impl<'a, 'b: 'a> RwData<'a, 'b> {
/// If no reflow has happened yet, this will just return the lock in
/// `possibly_locked_rw_data`. Otherwise, it will acquire the `rw_data` lock.
///
/// If you do not wish RPCs to remain blocked, just drop the `RWGuard`
/// returned from this function. If you _do_ wish for them to remain blocked,
/// use `block`.
fn lock(&mut self) -> RWGuard<'b> {
match self.possibly_locked_rw_data.take() {
None => RWGuard::Used(self.rw_data.lock().unwrap()),
Some(x) => RWGuard::Held(x),
}
}
}
impl Layout for LayoutThread {
fn process(&mut self, msg: script_layout_interface::message::Msg) {
self.handle_request(Request::FromScript(msg));
@ -308,10 +263,6 @@ impl Layout for LayoutThread {
self.handle_request(Request::FromFontCache);
}
fn rpc(&self) -> Box<dyn script_layout_interface::rpc::LayoutRPC> {
Box::new(LayoutRPCImpl(self.rw_data.clone())) as Box<dyn LayoutRPC>
}
fn waiting_for_web_fonts_to_load(&self) -> bool {
self.outstanding_web_fonts.load(Ordering::SeqCst) != 0
}
@ -350,6 +301,178 @@ impl Layout for LayoutThread {
self.stylist
.remove_stylesheet(DocumentStyleSheet(stylesheet.clone()), &guard);
}
fn query_content_box(&self, node: OpaqueNode) -> Option<UntypedRect<Au>> {
let Some(mut root_flow) = self.root_flow_for_query() else {
return None;
};
let root_flow_ref = FlowRef::deref_mut(&mut root_flow);
process_content_box_request(node, root_flow_ref)
}
fn query_content_boxes(&self, node: OpaqueNode) -> Vec<UntypedRect<Au>> {
let Some(mut root_flow) = self.root_flow_for_query() else {
return vec![];
};
let root_flow_ref = FlowRef::deref_mut(&mut root_flow);
process_content_boxes_request(node, root_flow_ref)
}
fn query_client_rect(&self, node: OpaqueNode) -> UntypedRect<i32> {
let Some(mut root_flow) = self.root_flow_for_query() else {
return UntypedRect::zero();
};
let root_flow_ref = FlowRef::deref_mut(&mut root_flow);
process_client_rect_query(node, root_flow_ref)
}
fn query_element_inner_text(
&self,
node: script_layout_interface::TrustedNodeAddress,
) -> String {
let node: ServoLayoutNode<LayoutData> = unsafe { ServoLayoutNode::new(&node) };
process_element_inner_text_query(node, &self.indexable_text.borrow())
}
fn query_inner_window_dimension(
&self,
browsing_context_id: BrowsingContextId,
) -> Option<Size2D<f32, CSSPixel>> {
self.last_iframe_sizes
.borrow()
.get(&browsing_context_id)
.cloned()
}
fn query_nodes_from_point(
&self,
point: UntypedPoint2D<f32>,
query_type: NodesFromPointQueryType,
) -> Vec<UntrustedNodeAddress> {
let mut flags = match query_type {
NodesFromPointQueryType::Topmost => HitTestFlags::empty(),
NodesFromPointQueryType::All => HitTestFlags::FIND_ALL,
};
// The point we get is not relative to the entire WebRender scene, but to this
// particular pipeline, so we need to tell WebRender about that.
flags.insert(HitTestFlags::POINT_RELATIVE_TO_PIPELINE_VIEWPORT);
let client_point = units::DevicePoint::from_untyped(point);
let results =
self.webrender_api
.hit_test(Some(self.id.to_webrender()), client_point, flags);
results.iter().map(|result| result.node).collect()
}
fn query_offset_parent(&self, node: OpaqueNode) -> OffsetParentResponse {
let Some(mut root_flow) = self.root_flow_for_query() else {
return OffsetParentResponse::default();
};
let root_flow_ref = FlowRef::deref_mut(&mut root_flow);
process_offset_parent_query(node, root_flow_ref)
}
fn query_resolved_style(
&self,
node: TrustedNodeAddress,
pseudo: Option<PseudoElement>,
property_id: PropertyId,
animations: DocumentAnimationSet,
animation_timeline_value: f64,
) -> String {
let node: ServoLayoutNode<LayoutData> = unsafe { ServoLayoutNode::new(&node) };
let document = node.owner_doc();
let document_shared_lock = document.style_shared_lock();
let guards = StylesheetGuards {
author: &document_shared_lock.read(),
ua_or_user: &UA_STYLESHEETS.shared_lock.read(),
};
let snapshot_map = SnapshotMap::new();
let shared_style_context = self.build_shared_style_context(
guards,
&snapshot_map,
animation_timeline_value,
&animations,
TraversalFlags::empty(),
);
let Some(mut root_flow) = self.root_flow_for_query() else {
return String::new();
};
let root_flow_ref = FlowRef::deref_mut(&mut root_flow);
process_resolved_style_request(
&shared_style_context,
node,
&pseudo,
&property_id,
root_flow_ref,
)
}
fn query_resolved_font_style(
&self,
node: TrustedNodeAddress,
value: &str,
animations: DocumentAnimationSet,
animation_timeline_value: f64,
) -> Option<ServoArc<Font>> {
let node: ServoLayoutNode<LayoutData> = unsafe { ServoLayoutNode::new(&node) };
let document = node.owner_doc();
let document_shared_lock = document.style_shared_lock();
let guards = StylesheetGuards {
author: &document_shared_lock.read(),
ua_or_user: &UA_STYLESHEETS.shared_lock.read(),
};
let snapshot_map = SnapshotMap::new();
let shared_style_context = self.build_shared_style_context(
guards,
&snapshot_map,
animation_timeline_value,
&animations,
TraversalFlags::empty(),
);
process_resolved_font_style_request(
&shared_style_context,
node,
value,
self.url.clone(),
document_shared_lock,
)
}
fn query_scroll_id(
&self,
node: script_layout_interface::TrustedNodeAddress,
) -> webrender_api::ExternalScrollId {
let node: ServoLayoutNode<LayoutData> = unsafe { ServoLayoutNode::new(&node) };
process_node_scroll_id_request(self.id, node)
}
fn query_scrolling_area(&self, node: Option<OpaqueNode>) -> UntypedRect<i32> {
let Some(mut root_flow) = self.root_flow_for_query() else {
return UntypedRect::zero();
};
let root_flow_ref = FlowRef::deref_mut(&mut root_flow);
process_scrolling_area_request(node, root_flow_ref)
}
fn query_text_indext(
&self,
node: OpaqueNode,
point_in_node: UntypedPoint2D<f32>,
) -> Option<usize> {
let point_in_node = Point2D::new(
Au::from_f32_px(point_in_node.x),
Au::from_f32_px(point_in_node.y),
);
self.indexable_text.borrow().text_index(node, point_in_node)
}
}
enum Request {
FromPipeline(LayoutControlMsg),
@ -358,6 +481,10 @@ enum Request {
}
impl LayoutThread {
fn root_flow_for_query(&self) -> Option<FlowRef> {
self.root_flow.borrow().clone()
}
fn new(
id: PipelineId,
url: ServoUrl,
@ -397,7 +524,7 @@ impl LayoutThread {
url,
is_iframe,
script_chan,
constellation_chan: constellation_chan.clone(),
constellation_chan,
time_profiler_chan,
registered_painters: RegisteredPaintersImpl(Default::default()),
image_cache,
@ -416,24 +543,9 @@ impl LayoutThread {
),
webrender_api,
stylist: Stylist::new(device, QuirksMode::NoQuirks),
rw_data: Arc::new(Mutex::new(LayoutThreadData {
constellation_chan,
display_list: None,
indexable_text: IndexableText::default(),
content_box_response: None,
content_boxes_response: Vec::new(),
client_rect_response: Rect::zero(),
scroll_id_response: None,
scrolling_area_response: Rect::zero(),
resolved_style_response: String::new(),
resolved_font_style_response: None,
offset_parent_response: OffsetParentResponse::empty(),
scroll_offsets: HashMap::new(),
text_index_response: TextIndexResponse(None),
nodes_from_point_response: vec![],
element_inner_text_response: String::new(),
inner_window_dimensions_response: None,
})),
display_list: Default::default(),
indexable_text: Default::default(),
scroll_offsets: Default::default(),
webrender_image_cache: Arc::new(RwLock::new(FnvHashMap::default())),
paint_time_metrics,
layout_query_waiting_time: Histogram::new(),
@ -443,6 +555,27 @@ impl LayoutThread {
}
}
fn build_shared_style_context<'a>(
&'a self,
guards: StylesheetGuards<'a>,
snapshot_map: &'a SnapshotMap,
animation_timeline_value: f64,
animations: &DocumentAnimationSet,
traversal_flags: TraversalFlags,
) -> SharedStyleContext<'a> {
SharedStyleContext {
stylist: &self.stylist,
options: GLOBAL_STYLE_DATA.options.clone(),
guards,
visited_styles_enabled: false,
animations: animations.clone(),
registered_speculative_painters: &self.registered_painters,
current_time_for_animations: animation_timeline_value,
traversal_flags,
snapshot_map,
}
}
// Create a layout context for use in building display lists, hit testing, &c.
fn build_layout_context<'a>(
&'a self,
@ -461,17 +594,13 @@ impl LayoutThread {
LayoutContext {
id: self.id,
origin,
style_context: SharedStyleContext {
stylist: &self.stylist,
options: GLOBAL_STYLE_DATA.options.clone(),
style_context: self.build_shared_style_context(
guards,
visited_styles_enabled: false,
animations: animations.clone(),
registered_speculative_painters: &self.registered_painters,
current_time_for_animations: animation_timeline_value,
traversal_flags,
snapshot_map,
},
animation_timeline_value,
animations,
traversal_flags,
),
image_cache: self.image_cache.clone(),
font_cache_thread: Mutex::new(self.font_cache_thread.clone()),
webrender_image_cache: self.webrender_image_cache.clone(),
@ -482,26 +611,18 @@ impl LayoutThread {
/// Receives and dispatches messages from the script and constellation threads
fn handle_request<'a, 'b>(&mut self, request: Request) {
let rw_data = self.rw_data.clone();
let mut possibly_locked_rw_data = Some(rw_data.lock().unwrap());
let mut rw_data = RwData {
rw_data: &rw_data,
possibly_locked_rw_data: &mut possibly_locked_rw_data,
};
match request {
Request::FromPipeline(LayoutControlMsg::SetScrollStates(new_scroll_states)) => {
self.handle_request_helper(Msg::SetScrollStates(new_scroll_states), &mut rw_data)
self.handle_request_helper(Msg::SetScrollStates(new_scroll_states))
},
Request::FromPipeline(LayoutControlMsg::ExitNow) => {
self.handle_request_helper(Msg::ExitNow, &mut rw_data);
self.handle_request_helper(Msg::ExitNow);
},
Request::FromPipeline(LayoutControlMsg::PaintMetric(epoch, paint_time)) => {
self.paint_time_metrics.maybe_set_metric(epoch, paint_time);
},
Request::FromScript(msg) => self.handle_request_helper(msg, &mut rw_data),
Request::FromScript(msg) => self.handle_request_helper(msg),
Request::FromFontCache => {
let _rw_data = rw_data.lock();
self.outstanding_web_fonts.fetch_sub(1, Ordering::SeqCst);
self.handle_web_font_loaded();
},
@ -509,32 +630,23 @@ impl LayoutThread {
}
/// Receives and dispatches messages from other threads.
fn handle_request_helper(
&mut self,
request: Msg,
possibly_locked_rw_data: &mut RwData<'_, '_>,
) {
fn handle_request_helper(&mut self, request: Msg) {
match request {
Msg::SetQuirksMode(mode) => self.handle_set_quirks_mode(mode),
Msg::GetRPC(response_chan) => {
response_chan
.send(Box::new(LayoutRPCImpl(self.rw_data.clone())) as Box<dyn LayoutRPC + Send>)
.unwrap();
},
Msg::Reflow(data) => {
let mut data = ScriptReflowResult::new(data);
profile(
profile_time::ProfilerCategory::LayoutPerform,
self.profiler_metadata(),
self.time_profiler_chan.clone(),
|| self.handle_reflow(&mut data, possibly_locked_rw_data),
|| self.handle_reflow(&mut data),
);
},
Msg::SetScrollStates(new_scroll_states) => {
self.set_scroll_states(new_scroll_states, possibly_locked_rw_data);
self.set_scroll_states(new_scroll_states);
},
Msg::CollectReports(reports_chan) => {
self.collect_reports(reports_chan, possibly_locked_rw_data);
self.collect_reports(reports_chan);
},
Msg::RegisterPaint(name, mut properties, painter) => {
debug!("Registering the painter");
@ -561,24 +673,20 @@ impl LayoutThread {
}
}
fn collect_reports(
&self,
reports_chan: ReportsChan,
possibly_locked_rw_data: &mut RwData<'_, '_>,
) {
fn collect_reports(&self, reports_chan: ReportsChan) {
let mut reports = vec![];
// Servo uses vanilla jemalloc, which doesn't have a
// malloc_enclosing_size_of function.
let mut ops = MallocSizeOfOps::new(servo_allocator::usable_size, None, None);
// FIXME(njn): Just measuring the display tree for now.
let rw_data = possibly_locked_rw_data.lock();
let display_list = rw_data.display_list.as_ref();
let display_list = self.display_list.borrow();
let display_list_ref = display_list.as_ref();
let formatted_url = &format!("url({})", self.url);
reports.push(Report {
path: path![formatted_url, "layout-thread", "display-list"],
kind: ReportKind::ExplicitJemallocHeapSize,
size: display_list.map_or(0, |sc| sc.size_of(&mut ops)),
size: display_list_ref.map_or(0, |sc| sc.size_of(&mut ops)),
});
reports.push(Report {
@ -768,7 +876,6 @@ impl LayoutThread {
document: Option<&ServoLayoutDocument<LayoutData>>,
layout_root: &mut dyn Flow,
layout_context: &mut LayoutContext,
rw_data: &mut LayoutThreadData,
) {
let writing_mode = layout_root.base().writing_mode;
let (metadata, sender) = (self.profiler_metadata(), self.time_profiler_chan.clone());
@ -791,7 +898,7 @@ impl LayoutThread {
.base()
.restyle_damage
.contains(ServoRestyleDamage::REPAINT) ||
rw_data.display_list.is_none()
self.display_list.borrow().is_none()
{
if reflow_goal.needs_display_list() {
let background_color = get_root_flow_background_color(layout_root);
@ -817,8 +924,9 @@ impl LayoutThread {
let iframe_sizes = std::mem::take(&mut build_state.iframe_sizes);
self.update_iframe_sizes(iframe_sizes);
rw_data.indexable_text = std::mem::take(&mut build_state.indexable_text);
rw_data.display_list = Some(build_state.to_display_list());
*self.indexable_text.borrow_mut() =
std::mem::take(&mut build_state.indexable_text);
*self.display_list.borrow_mut() = Some(build_state.to_display_list());
}
}
@ -836,8 +944,8 @@ impl LayoutThread {
document.will_paint();
}
let display_list = rw_data.display_list.as_mut().unwrap();
let mut display_list = self.display_list.borrow_mut();
let display_list = display_list.as_mut().unwrap();
if self.debug.dump_display_list {
display_list.print();
}
@ -873,11 +981,7 @@ impl LayoutThread {
}
/// The high-level routine that performs layout.
fn handle_reflow(
&mut self,
data: &mut ScriptReflowResult,
possibly_locked_rw_data: &mut RwData<'_, '_>,
) {
fn handle_reflow(&mut self, data: &mut ScriptReflowResult) {
let document = unsafe { ServoLayoutNode::new(&data.document) };
let document = document.as_document().unwrap();
@ -888,8 +992,6 @@ impl LayoutThread {
debug!("Number of objects in DOM: {}", data.dom_count);
debug!("layout: parallel? {}", self.parallel_flag);
let mut rw_data = possibly_locked_rw_data.lock();
// Record the time that layout query has been waited.
let now = time::precise_time_ns();
if let ReflowGoal::LayoutQuery(_, timestamp) = data.reflow_goal {
@ -898,57 +1000,9 @@ impl LayoutThread {
.expect("layout: wrong layout query timestamp");
};
let root_element = match document.root_element() {
None => {
// Since we cannot compute anything, give spec-required placeholders.
debug!("layout: No root node: bailing");
match data.reflow_goal {
ReflowGoal::LayoutQuery(ref query_msg, _) => match query_msg {
&QueryMsg::ContentBoxQuery(_) => {
rw_data.content_box_response = None;
},
&QueryMsg::ContentBoxesQuery(_) => {
rw_data.content_boxes_response = Vec::new();
},
&QueryMsg::NodesFromPointQuery(..) => {
rw_data.nodes_from_point_response = Vec::new();
},
&QueryMsg::ClientRectQuery(_) => {
rw_data.client_rect_response = Rect::zero();
},
&QueryMsg::ScrollingAreaQuery(_) => {
rw_data.scrolling_area_response = Rect::zero();
},
&QueryMsg::NodeScrollIdQuery(_) => {
rw_data.scroll_id_response = None;
},
&QueryMsg::ResolvedStyleQuery(_, _, _) => {
rw_data.resolved_style_response = String::new();
},
&QueryMsg::OffsetParentQuery(_) => {
rw_data.offset_parent_response = OffsetParentResponse::empty();
},
&QueryMsg::StyleQuery => {},
&QueryMsg::TextIndexQuery(..) => {
rw_data.text_index_response = TextIndexResponse(None);
},
&QueryMsg::ElementInnerTextQuery(_) => {
rw_data.element_inner_text_response = String::new();
},
&QueryMsg::ResolvedFontStyleQuery(..) => {
rw_data.resolved_font_style_response = None;
},
&QueryMsg::InnerWindowDimensionsQuery(_) => {
rw_data.inner_window_dimensions_response = None;
},
},
ReflowGoal::Full |
ReflowGoal::TickAnimations |
ReflowGoal::UpdateScrollNode(_) => {},
}
return;
},
Some(x) => x,
let Some(root_element) = document.root_element() else {
debug!("layout: No root node: bailing");
return;
};
debug!(
@ -1156,129 +1210,24 @@ impl LayoutThread {
&data.reflow_info,
&data.reflow_goal,
Some(&document),
&mut rw_data,
&mut layout_context,
thread_pool,
);
}
self.first_reflow.set(false);
self.respond_to_query_if_necessary(
&data.reflow_goal,
&mut *rw_data,
&mut layout_context,
data.result.borrow_mut().as_mut().unwrap(),
document_shared_lock,
);
}
fn respond_to_query_if_necessary(
&self,
reflow_goal: &ReflowGoal,
rw_data: &mut LayoutThreadData,
context: &mut LayoutContext,
reflow_result: &mut ReflowComplete,
shared_lock: &SharedRwLock,
) {
reflow_result.pending_images = std::mem::take(&mut *context.pending_images.lock().unwrap());
data.result.borrow_mut().as_mut().unwrap().pending_images =
std::mem::take(&mut *layout_context.pending_images.lock().unwrap());
let mut root_flow = match self.root_flow.borrow().clone() {
Some(root_flow) => root_flow,
None => return,
};
let root_flow = FlowRef::deref_mut(&mut root_flow);
match *reflow_goal {
ReflowGoal::LayoutQuery(ref querymsg, _) => match querymsg {
&QueryMsg::ContentBoxQuery(node) => {
rw_data.content_box_response = process_content_box_request(node, root_flow);
},
&QueryMsg::ContentBoxesQuery(node) => {
rw_data.content_boxes_response = process_content_boxes_request(node, root_flow);
},
&QueryMsg::TextIndexQuery(node, point_in_node) => {
let point_in_node = Point2D::new(
Au::from_f32_px(point_in_node.x),
Au::from_f32_px(point_in_node.y),
);
rw_data.text_index_response =
TextIndexResponse(rw_data.indexable_text.text_index(node, point_in_node));
},
&QueryMsg::ClientRectQuery(node) => {
rw_data.client_rect_response = process_client_rect_query(node, root_flow);
},
&QueryMsg::ScrollingAreaQuery(node) => {
rw_data.scrolling_area_response =
process_scrolling_area_request(node, root_flow);
},
&QueryMsg::NodeScrollIdQuery(node) => {
let node: ServoLayoutNode<LayoutData> = unsafe { ServoLayoutNode::new(&node) };
rw_data.scroll_id_response =
Some(process_node_scroll_id_request(self.id, node));
},
&QueryMsg::ResolvedStyleQuery(node, ref pseudo, ref property) => {
let node: ServoLayoutNode<LayoutData> = unsafe { ServoLayoutNode::new(&node) };
rw_data.resolved_style_response =
process_resolved_style_request(context, node, pseudo, property, root_flow);
},
&QueryMsg::ResolvedFontStyleQuery(node, ref property, ref value) => {
let node: ServoLayoutNode<LayoutData> = unsafe { ServoLayoutNode::new(&node) };
let url = self.url.clone();
rw_data.resolved_font_style_response = process_resolved_font_style_request(
context,
node,
value,
property,
url,
shared_lock,
);
},
&QueryMsg::OffsetParentQuery(node) => {
rw_data.offset_parent_response = process_offset_parent_query(node, root_flow);
},
&QueryMsg::StyleQuery => {},
&QueryMsg::NodesFromPointQuery(client_point, ref reflow_goal) => {
let mut flags = match reflow_goal {
&NodesFromPointQueryType::Topmost => HitTestFlags::empty(),
&NodesFromPointQueryType::All => HitTestFlags::FIND_ALL,
};
// The point we get is not relative to the entire WebRender scene, but to this
// particular pipeline, so we need to tell WebRender about that.
flags.insert(HitTestFlags::POINT_RELATIVE_TO_PIPELINE_VIEWPORT);
let client_point = units::DevicePoint::from_untyped(client_point);
let results = self.webrender_api.hit_test(
Some(self.id.to_webrender()),
client_point,
flags,
);
rw_data.nodes_from_point_response =
results.iter().map(|result| result.node).collect()
},
&QueryMsg::ElementInnerTextQuery(node) => {
let node: ServoLayoutNode<LayoutData> = unsafe { ServoLayoutNode::new(&node) };
rw_data.element_inner_text_response =
process_element_inner_text_query(node, &rw_data.indexable_text);
},
&QueryMsg::InnerWindowDimensionsQuery(browsing_context_id) => {
rw_data.inner_window_dimensions_response = self
.last_iframe_sizes
.borrow()
.get(&browsing_context_id)
.cloned();
},
},
ReflowGoal::UpdateScrollNode(scroll_state) => {
self.update_scroll_node_state(&scroll_state, rw_data);
},
ReflowGoal::Full | ReflowGoal::TickAnimations => {},
if let ReflowGoal::UpdateScrollNode(scroll_state) = data.reflow_goal {
self.update_scroll_node_state(&scroll_state);
}
}
fn update_scroll_node_state(&self, state: &ScrollState, rw_data: &mut LayoutThreadData) {
rw_data
.scroll_offsets
fn update_scroll_node_state(&self, state: &ScrollState) {
self.scroll_offsets
.borrow_mut()
.insert(state.scroll_id, state.scroll_offset);
let point = Point2D::new(-state.scroll_offset.x, -state.scroll_offset.y);
@ -1289,12 +1238,7 @@ impl LayoutThread {
);
}
fn set_scroll_states(
&mut self,
new_scroll_states: Vec<ScrollState>,
possibly_locked_rw_data: &mut RwData<'_, '_>,
) {
let mut rw_data = possibly_locked_rw_data.lock();
fn set_scroll_states(&mut self, new_scroll_states: Vec<ScrollState>) {
let mut script_scroll_states = vec![];
let mut layout_scroll_states = HashMap::new();
for new_state in &new_scroll_states {
@ -1313,7 +1257,7 @@ impl LayoutThread {
self.id,
script_scroll_states,
));
rw_data.scroll_offsets = layout_scroll_states
*self.scroll_offsets.borrow_mut() = layout_scroll_states
}
/// Cancel animations for any nodes which have been removed from flow tree.
@ -1363,7 +1307,6 @@ impl LayoutThread {
data: &Reflow,
reflow_goal: &ReflowGoal,
document: Option<&ServoLayoutDocument<LayoutData>>,
rw_data: &mut LayoutThreadData,
context: &mut LayoutContext,
thread_pool: Option<&rayon::ThreadPool>,
) {
@ -1449,14 +1392,7 @@ impl LayoutThread {
},
);
self.perform_post_main_layout_passes(
data,
root_flow,
reflow_goal,
document,
rw_data,
context,
);
self.perform_post_main_layout_passes(data, root_flow, reflow_goal, document, context);
}
fn perform_post_main_layout_passes(
@ -1465,7 +1401,6 @@ impl LayoutThread {
mut root_flow: &mut FlowRef,
reflow_goal: &ReflowGoal,
document: Option<&ServoLayoutDocument<LayoutData>>,
rw_data: &mut LayoutThreadData,
layout_context: &mut LayoutContext,
) {
// Build the display list if necessary, and send it to the painter.
@ -1475,7 +1410,6 @@ impl LayoutThread {
document,
FlowRef::deref_mut(&mut root_flow),
&mut *layout_context,
rw_data,
);
if self.debug.trace_layout {