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layout: Keep track of whether we've deferred the painting of the document due to

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a script query.

This will, rather unfortunately, mean that we might repaint two times if we've
deferred a paint, then get an out-of-band reflow. Still seemed better than not
suppressing paints at all.

Fixes #13131
This commit is contained in:
Emilio Cobos Álvarez 2016-08-30 16:37:37 -07:00
parent 1fcc447941
commit fd9cd2f103
No known key found for this signature in database
GPG key ID: 056B727BB9C1027C
6 changed files with 106 additions and 52 deletions
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116
components/layout_thread/lib.rs
View file

@ -85,7 +85,7 @@ use net_traits::image_cache_thread::{ImageCacheChan, ImageCacheResult, ImageCach
use profile_traits::mem::{self, Report, ReportKind, ReportsChan};
use profile_traits::time::{TimerMetadataFrameType, TimerMetadataReflowType};
use profile_traits::time::{self, TimerMetadata, profile};
use script::layout_wrapper::ServoLayoutNode;
use script::layout_wrapper::{ServoLayoutDocument, ServoLayoutNode};
use script_layout_interface::message::{Msg, NewLayoutThreadInfo, Reflow, ReflowQueryType, ScriptReflow};
use script_layout_interface::reporter::CSSErrorReporter;
use script_layout_interface::restyle_damage::{REPAINT, STORE_OVERFLOW, REFLOW_OUT_OF_FLOW, REFLOW};
@ -629,6 +629,7 @@ impl LayoutThread {
reflow_info.goal);
self.perform_post_style_recalc_layout_passes(&reflow_info,
None,
&mut *rw_data,
&mut layout_context);
@ -901,6 +902,7 @@ impl LayoutThread {
fn compute_abs_pos_and_build_display_list(&mut self,
data: &Reflow,
document: Option<&ServoLayoutDocument>,
layout_root: &mut Flow,
shared_layout_context: &mut SharedLayoutContext,
rw_data: &mut LayoutThreadData) {
@ -962,59 +964,69 @@ impl LayoutThread {
Some(Arc::new(DisplayList::new(root_stacking_context, display_list_entries)))
}
if data.goal == ReflowGoal::ForDisplay {
let display_list = (*rw_data.display_list.as_ref().unwrap()).clone();
if data.goal != ReflowGoal::ForDisplay {
// Defer the paint step until the next ForDisplay.
//
// We need to tell the document about this so it doesn't
// incorrectly suppress reflows. See #13131.
document.expect("No document in a non-display reflow?")
.needs_paint_from_layout();
return;
}
if let Some(document) = document {
document.will_paint();
}
let display_list = (*rw_data.display_list.as_ref().unwrap()).clone();
if opts::get().dump_display_list {
display_list.print();
}
if opts::get().dump_display_list_json {
println!("{}", serde_json::to_string_pretty(&display_list).unwrap());
}
if opts::get().dump_display_list {
display_list.print();
}
if opts::get().dump_display_list_json {
println!("{}", serde_json::to_string_pretty(&display_list).unwrap());
}
debug!("Layout done!");
debug!("Layout done!");
self.epoch.next();
self.epoch.next();
if let Some(ref mut webrender_api) = self.webrender_api {
// TODO: Avoid the temporary conversion and build webrender sc/dl directly!
let Epoch(epoch_number) = self.epoch;
let epoch = webrender_traits::Epoch(epoch_number);
let pipeline_id = self.id.to_webrender();
if let Some(ref mut webrender_api) = self.webrender_api {
// TODO: Avoid the temporary conversion and build webrender sc/dl directly!
let Epoch(epoch_number) = self.epoch;
let epoch = webrender_traits::Epoch(epoch_number);
let pipeline_id = self.id.to_webrender();
// TODO(gw) For now only create a root scrolling layer!
let mut frame_builder = WebRenderFrameBuilder::new(pipeline_id);
let root_scroll_layer_id = frame_builder.next_scroll_layer_id();
let sc_id = rw_data.display_list.as_ref().unwrap().convert_to_webrender(
webrender_api,
pipeline_id,
epoch,
Some(root_scroll_layer_id),
&mut frame_builder);
let root_background_color = get_root_flow_background_color(layout_root);
let root_background_color =
webrender_traits::ColorF::new(root_background_color.r,
root_background_color.g,
root_background_color.b,
root_background_color.a);
// TODO(gw) For now only create a root scrolling layer!
let mut frame_builder = WebRenderFrameBuilder::new(pipeline_id);
let root_scroll_layer_id = frame_builder.next_scroll_layer_id();
let sc_id = rw_data.display_list.as_ref().unwrap().convert_to_webrender(
webrender_api,
pipeline_id,
epoch,
Some(root_scroll_layer_id),
&mut frame_builder);
let root_background_color = get_root_flow_background_color(layout_root);
let root_background_color =
webrender_traits::ColorF::new(root_background_color.r,
root_background_color.g,
root_background_color.b,
root_background_color.a);
let viewport_size = Size2D::new(self.viewport_size.width.to_f32_px(),
self.viewport_size.height.to_f32_px());
let viewport_size = Size2D::new(self.viewport_size.width.to_f32_px(),
self.viewport_size.height.to_f32_px());
webrender_api.set_root_stacking_context(
sc_id,
root_background_color,
epoch,
pipeline_id,
viewport_size,
frame_builder.stacking_contexts,
frame_builder.display_lists,
frame_builder.auxiliary_lists_builder.finalize());
} else {
self.paint_chan
.send(LayoutToPaintMsg::PaintInit(self.epoch, display_list))
.unwrap();
}
webrender_api.set_root_stacking_context(
sc_id,
root_background_color,
epoch,
pipeline_id,
viewport_size,
frame_builder.stacking_contexts,
frame_builder.display_lists,
frame_builder.auxiliary_lists_builder.finalize());
} else {
self.paint_chan
.send(LayoutToPaintMsg::PaintInit(self.epoch, display_list))
.unwrap();
}
});
}
@ -1205,6 +1217,7 @@ impl LayoutThread {
// Perform post-style recalculation layout passes.
self.perform_post_style_recalc_layout_passes(&data.reflow_info,
Some(&document),
&mut rw_data,
&mut shared_layout_context);
@ -1327,7 +1340,7 @@ impl LayoutThread {
false,
reflow_info.goal);
self.perform_post_main_layout_passes(&reflow_info, &mut *rw_data, &mut layout_context);
self.perform_post_main_layout_passes(&reflow_info, None, &mut *rw_data, &mut layout_context);
true
}
@ -1385,6 +1398,7 @@ impl LayoutThread {
}
self.perform_post_style_recalc_layout_passes(&reflow_info,
None,
&mut *rw_data,
&mut layout_context);
}
@ -1407,12 +1421,14 @@ impl LayoutThread {
return
}
self.perform_post_style_recalc_layout_passes(&reflow_info,
None,
&mut *rw_data,
&mut layout_context);
}
fn perform_post_style_recalc_layout_passes(&mut self,
data: &Reflow,
document: Option<&ServoLayoutDocument>,
rw_data: &mut LayoutThreadData,
layout_context: &mut SharedLayoutContext) {
if let Some(mut root_flow) = self.root_flow.clone() {
@ -1487,17 +1503,19 @@ impl LayoutThread {
flow_ref::deref_mut(&mut root_flow) as &mut Flow);
});
self.perform_post_main_layout_passes(data, rw_data, layout_context);
self.perform_post_main_layout_passes(data, document, rw_data, layout_context);
}
}
fn perform_post_main_layout_passes(&mut self,
data: &Reflow,
document: Option<&ServoLayoutDocument>,
rw_data: &mut LayoutThreadData,
layout_context: &mut SharedLayoutContext) {
// Build the display list if necessary, and send it to the painter.
if let Some(mut root_flow) = self.root_flow.clone() {
self.compute_abs_pos_and_build_display_list(data,
document,
flow_ref::deref_mut(&mut root_flow),
&mut *layout_context,
rw_data);

23
components/script/dom/document.rs
View file

@ -221,6 +221,9 @@ pub struct Document {
/// For each element that has had a state or attribute change since the last restyle,
/// track the original condition of the element.
modified_elements: DOMRefCell<HashMap<JS<Element>, ElementSnapshot>>,
/// This flag will be true if layout suppressed a reflow attempt that was
/// needed in order for the page to be painted.
needs_paint: Cell<bool>,
/// http://w3c.github.io/touch-events/#dfn-active-touch-point
active_touch_points: DOMRefCell<Vec<JS<Touch>>>,
/// Navigation Timing properties:
@ -376,6 +379,10 @@ impl Document {
}
}
pub fn needs_paint(&self) -> bool {
self.needs_paint.get()
}
pub fn needs_reflow(&self) -> bool {
// FIXME: This should check the dirty bit on the document,
// not the document element. Needs some layout changes to make
@ -384,7 +391,8 @@ impl Document {
Some(root) => {
root.upcast::<Node>().is_dirty() ||
root.upcast::<Node>().has_dirty_descendants() ||
!self.modified_elements.borrow().is_empty()
!self.modified_elements.borrow().is_empty() ||
self.needs_paint()
}
None => false,
}
@ -1602,6 +1610,8 @@ pub enum DocumentSource {
pub trait LayoutDocumentHelpers {
unsafe fn is_html_document_for_layout(&self) -> bool;
unsafe fn drain_modified_elements(&self) -> Vec<(LayoutJS<Element>, ElementSnapshot)>;
unsafe fn needs_paint_from_layout(&self);
unsafe fn will_paint(&self);
}
#[allow(unsafe_code)]
@ -1618,6 +1628,16 @@ impl LayoutDocumentHelpers for LayoutJS<Document> {
let result = elements.drain().map(|(k, v)| (k.to_layout(), v)).collect();
result
}
#[inline]
unsafe fn needs_paint_from_layout(&self) {
(*self.unsafe_get()).needs_paint.set(true)
}
#[inline]
unsafe fn will_paint(&self) {
(*self.unsafe_get()).needs_paint.set(false)
}
}
/// https://url.spec.whatwg.org/#network-scheme
@ -1723,6 +1743,7 @@ impl Document {
base_element: Default::default(),
appropriate_template_contents_owner_document: Default::default(),
modified_elements: DOMRefCell::new(HashMap::new()),
needs_paint: Cell::new(false),
active_touch_points: DOMRefCell::new(Vec::new()),
dom_loading: Cell::new(Default::default()),
dom_interactive: Cell::new(Default::default()),

6
components/script/dom/window.rs
View file

@ -1200,9 +1200,11 @@ impl Window {
if !for_display || self.Document().needs_reflow() {
issued_reflow = self.force_reflow(goal, query_type, reason);
// If window_size is `None`, we don't reflow, so the document stays dirty.
// Otherwise, we shouldn't need a reflow immediately after a reflow.
// If window_size is `None`, we don't reflow, so the document stays
// dirty. Otherwise, we shouldn't need a reflow immediately after a
// reflow, except if we're waiting for a deferred paint.
assert!(!self.Document().needs_reflow() ||
(!for_display && self.Document().needs_paint()) ||
self.window_size.get().is_none() ||
self.suppress_reflow.get());
} else {

8
components/script/layout_wrapper.rs
View file

@ -405,6 +405,14 @@ impl<'ld> TDocument for ServoLayoutDocument<'ld> {
let elements = unsafe { self.document.drain_modified_elements() };
elements.into_iter().map(|(el, snapshot)| (ServoLayoutElement::from_layout_js(el), snapshot)).collect()
}
fn needs_paint_from_layout(&self) {
unsafe { self.document.needs_paint_from_layout(); }
}
fn will_paint(&self) {
unsafe { self.document.will_paint(); }
}
}
impl<'ld> ServoLayoutDocument<'ld> {

3
components/style/dom.rs
View file

@ -179,6 +179,9 @@ pub trait TDocument : Sized + Copy + Clone {
fn drain_modified_elements(&self) -> Vec<(Self::ConcreteElement,
<Self::ConcreteElement as ElementExt>::Snapshot)>;
fn needs_paint_from_layout(&self);
fn will_paint(&self);
}
pub trait PresentationalHintsSynthetizer {

2
ports/geckolib/wrapper.rs
View file

@ -414,6 +414,8 @@ impl<'ld> TDocument for GeckoDocument<'ld> {
let elements = unsafe { self.document.drain_modified_elements() };
elements.into_iter().map(|(el, snapshot)| (ServoLayoutElement::from_layout_js(el), snapshot)).collect()*/
}
fn will_paint(&self) { unimplemented!() }
fn needs_paint_from_layout(&self) { unimplemented!() }
}
#[derive(Clone, Copy)]