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script: When using WebRender, keep the DOM-side scroll positions for

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elements with `overflow: scroll` up to date, and take them into account
when doing hit testing.

Closes #11648.
This commit is contained in:
Patrick Walton 2016-06-08 18:46:02 -07:00
parent ce88b8ed30
commit 041cfe6d0a
14 changed files with 259 additions and 47 deletions
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38
components/layout/layout_thread.rs
View file

@ -21,13 +21,13 @@ use euclid::size::Size2D;
use flow::{self, Flow, ImmutableFlowUtils, MutableOwnedFlowUtils};
use flow_ref::{self, FlowRef};
use fnv::FnvHasher;
use gfx::display_list::{ClippingRegion, DisplayItemMetadata, DisplayList, LayerInfo};
use gfx::display_list::{OpaqueNode, StackingContext, StackingContextType, WebRenderImageInfo};
use gfx::display_list::{ClippingRegion, DisplayItemMetadata, DisplayList, LayerInfo, OpaqueNode};
use gfx::display_list::{ScrollOffsetMap, StackingContext, StackingContextType, WebRenderImageInfo};
use gfx::font;
use gfx::font_cache_thread::FontCacheThread;
use gfx::font_context;
use gfx::paint_thread::LayoutToPaintMsg;
use gfx_traits::{color, Epoch, LayerId, ScrollPolicy, StackingContextId};
use gfx_traits::{color, Epoch, FragmentType, LayerId, ScrollPolicy, StackingContextId};
use heapsize::HeapSizeOf;
use incremental::LayoutDamageComputation;
use incremental::{REPAINT, STORE_OVERFLOW, REFLOW_OUT_OF_FLOW, REFLOW, REFLOW_ENTIRE_DOCUMENT};
@ -51,8 +51,8 @@ use script::layout_interface::OpaqueStyleAndLayoutData;
use script::layout_interface::{LayoutRPC, OffsetParentResponse, NodeOverflowResponse, MarginStyleResponse};
use script::layout_interface::{Msg, NewLayoutThreadInfo, Reflow, ReflowQueryType, ScriptReflow};
use script::reporter::CSSErrorReporter;
use script_traits::StackingContextScrollState;
use script_traits::{ConstellationControlMsg, LayoutControlMsg, LayoutMsg as ConstellationMsg};
use script_traits::{StackingContextScrollState, UntrustedNodeAddress};
use sequential;
use serde_json;
use std::borrow::ToOwned;
@ -133,6 +133,9 @@ pub struct LayoutThreadData {
/// A queued response for the offset parent/rect of a node.
pub margin_style_response: MarginStyleResponse,
/// Scroll offsets of stacking contexts. This will only be populated if WebRender is in use.
pub stacking_context_scroll_offsets: ScrollOffsetMap,
}
/// Information needed by the layout thread.
@ -472,6 +475,7 @@ impl LayoutThread {
resolved_style_response: None,
offset_parent_response: OffsetParentResponse::empty(),
margin_style_response: MarginStyleResponse::empty(),
stacking_context_scroll_offsets: HashMap::new(),
})),
error_reporter: CSSErrorReporter {
pipelineid: id,
@ -1172,7 +1176,9 @@ impl LayoutThread {
let point = Point2D::new(Au::from_f32_px(point.x), Au::from_f32_px(point.y));
let result = match rw_data.display_list {
None => panic!("Tried to hit test with no display list"),
Some(ref dl) => dl.hit_test(point),
Some(ref display_list) => {
display_list.hit_test(&point, &rw_data.stacking_context_scroll_offsets)
}
};
rw_data.hit_test_response = if result.len() > 0 {
(Some(result[0]), update_cursor)
@ -1273,14 +1279,26 @@ impl LayoutThread {
fn set_stacking_context_scroll_states<'a, 'b>(
&mut self,
new_scroll_states: Vec<StackingContextScrollState>,
_: &mut RwData<'a, 'b>) {
possibly_locked_rw_data: &mut RwData<'a, 'b>) {
let mut rw_data = possibly_locked_rw_data.lock();
let mut script_scroll_states = vec![];
let mut layout_scroll_states = HashMap::new();
for new_scroll_state in &new_scroll_states {
if self.root_flow.is_some() && new_scroll_state.stacking_context_id.id() == 0 {
let _ = self.script_chan.send(ConstellationControlMsg::SetScrollState(
self.id,
new_scroll_state.scroll_offset));
let offset = new_scroll_state.scroll_offset;
layout_scroll_states.insert(new_scroll_state.stacking_context_id, offset);
if new_scroll_state.stacking_context_id == StackingContextId::root() {
script_scroll_states.push((UntrustedNodeAddress::from_id(0), offset))
} else if !new_scroll_state.stacking_context_id.is_special() &&
new_scroll_state.stacking_context_id.fragment_type() ==
FragmentType::FragmentBody {
let id = new_scroll_state.stacking_context_id.id();
script_scroll_states.push((UntrustedNodeAddress::from_id(id), offset))
}
}
let _ = self.script_chan
.send(ConstellationControlMsg::SetScrollState(self.id, script_scroll_states));
rw_data.stacking_context_scroll_offsets = layout_scroll_states
}
fn tick_all_animations<'a, 'b>(&mut self, possibly_locked_rw_data: &mut RwData<'a, 'b>) {