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Remove most of the things in layout 2020

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We keep mostly the query system. There is probably more to delete but
that's a good start I think.
This commit is contained in:
Anthony Ramine 2019-07-24 11:19:23 +02:00
parent 4846d76e82
commit 317d700f5d
47 changed files with 75 additions and 29854 deletions
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105
components/layout_2020/query.rs
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@ -4,16 +4,11 @@
//! Utilities for querying the layout, as needed by the layout thread.
use crate::construct::ConstructionResult;
use crate::context::LayoutContext;
use crate::display_list::items::{DisplayList, OpaqueNode, ScrollOffsetMap};
use crate::display_list::IndexableText;
use crate::flow::{Flow, GetBaseFlow};
use crate::fragment::{Fragment, FragmentBorderBoxIterator, SpecificFragmentInfo};
use crate::inline::InlineFragmentNodeFlags;
use crate::fragment::{Fragment, FragmentBorderBoxIterator};
use crate::opaque_node::OpaqueNodeMethods;
use crate::sequential;
use crate::wrapper::LayoutNodeLayoutData;
use app_units::Au;
use euclid::{Point2D, Rect, Size2D, Vector2D};
use ipc_channel::ipc::IpcSender;
@ -30,7 +25,6 @@ use script_layout_interface::{LayoutElementType, LayoutNodeType};
use script_traits::LayoutMsg as ConstellationMsg;
use script_traits::UntrustedNodeAddress;
use std::cmp::{max, min};
use std::ops::Deref;
use std::sync::{Arc, Mutex};
use style::computed_values::display::T as Display;
use style::computed_values::position::T as Position;
@ -366,24 +360,16 @@ impl FragmentBorderBoxIterator for MarginRetrievingFragmentBorderBoxIterator {
pub fn process_content_box_request(
requested_node: OpaqueNode,
layout_root: &mut dyn Flow,
) -> Option<Rect<Au>> {
// FIXME(pcwalton): This has not been updated to handle the stacking context relative
// stuff. So the position is wrong in most cases.
let mut iterator = UnioningFragmentBorderBoxIterator::new(requested_node);
sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
iterator.rect
UnioningFragmentBorderBoxIterator::new(requested_node).rect
}
pub fn process_content_boxes_request(
requested_node: OpaqueNode,
layout_root: &mut dyn Flow,
) -> Vec<Rect<Au>> {
// FIXME(pcwalton): This has not been updated to handle the stacking context relative
// stuff. So the position is wrong in most cases.
let mut iterator = CollectingFragmentBorderBoxIterator::new(requested_node);
sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
iterator.rects
CollectingFragmentBorderBoxIterator::new(requested_node).rects
}
struct FragmentLocatingFragmentIterator {
@ -581,45 +567,6 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
if fragment.style.get_box().position == Position::Fixed {
self.parent_nodes.clear();
}
} else if let Some(node) = fragment.inline_context.as_ref().and_then(|inline_context| {
inline_context
.nodes
.iter()
.find(|node| node.address == self.node_address)
}) {
// TODO: Handle cases where the `offsetParent` is an inline
// element. This will likely be impossible until
// https://github.com/servo/servo/issues/13982 is fixed.
// Found a fragment in the flow tree whose inline context
// contains the DOM node we're looking for, i.e. the node
// is inline and contains this fragment.
match self.node_offset_box {
Some(NodeOffsetBoxInfo {
ref mut rectangle, ..
}) => {
*rectangle = rectangle.union(border_box);
},
None => {
// https://github.com/servo/servo/issues/13982 will
// cause this assertion to fail sometimes, so it's
// commented out for now.
/*assert!(node.flags.contains(FIRST_FRAGMENT_OF_ELEMENT),
"First fragment of inline node found wasn't its first fragment!");*/
self.node_offset_box = Some(NodeOffsetBoxInfo {
offset: border_box.origin,
rectangle: *border_box,
});
},
}
if node
.flags
.contains(InlineFragmentNodeFlags::LAST_FRAGMENT_OF_ELEMENT)
{
self.has_processed_node = true;
}
} else if self.node_offset_box.is_none() {
// TODO(gw): Is there a less fragile way of checking whether this
// fragment is the body element, rather than just checking that
@ -636,8 +583,6 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
// 2) Is static position *and* is a table or table cell
// 3) Is not static position
(true, _, _) |
(false, Position::Static, &SpecificFragmentInfo::Table) |
(false, Position::Static, &SpecificFragmentInfo::TableCell) |
(false, Position::Sticky, _) |
(false, Position::Absolute, _) |
(false, Position::Relative, _) |
@ -671,11 +616,8 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
pub fn process_node_geometry_request(
requested_node: OpaqueNode,
layout_root: &mut dyn Flow,
) -> Rect<i32> {
let mut iterator = FragmentLocatingFragmentIterator::new(requested_node);
sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
iterator.client_rect
FragmentLocatingFragmentIterator::new(requested_node).client_rect
}
pub fn process_node_scroll_id_request<N: LayoutNode>(
@ -689,10 +631,8 @@ pub fn process_node_scroll_id_request<N: LayoutNode>(
/// https://drafts.csswg.org/cssom-view/#scrolling-area
pub fn process_node_scroll_area_request(
requested_node: OpaqueNode,
layout_root: &mut dyn Flow,
) -> Rect<i32> {
let mut iterator = UnioningFragmentScrollAreaIterator::new(requested_node);
sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
let iterator = UnioningFragmentScrollAreaIterator::new(requested_node);
match iterator.overflow_direction {
OverflowDirection::RightAndDown => {
let right = max(
@ -742,7 +682,6 @@ pub fn process_resolved_style_request<'a, N>(
node: N,
pseudo: &Option<PseudoElement>,
property: &PropertyId,
layout_root: &mut dyn Flow,
) -> String
where
N: LayoutNode,
@ -755,7 +694,7 @@ where
// We call process_resolved_style_request after performing a whole-document
// traversal, so in the common case, the element is styled.
if element.get_data().is_some() {
return process_resolved_style_request_internal(node, pseudo, property, layout_root);
return process_resolved_style_request_internal(node, pseudo, property);
}
// In a display: none subtree. No pseudo-element exists.
@ -791,7 +730,6 @@ fn process_resolved_style_request_internal<'a, N>(
requested_node: N,
pseudo: &Option<PseudoElement>,
property: &PropertyId,
layout_root: &mut dyn Flow,
) -> String
where
N: LayoutNode,
@ -842,24 +780,11 @@ where
let applies = true;
fn used_value_for_position_property<N: LayoutNode>(
layout_el: <N::ConcreteThreadSafeLayoutNode as ThreadSafeLayoutNode>::ConcreteThreadSafeLayoutElement,
layout_root: &mut dyn Flow,
_layout_el: <N::ConcreteThreadSafeLayoutNode as ThreadSafeLayoutNode>::ConcreteThreadSafeLayoutElement,
requested_node: N,
longhand_id: LonghandId,
) -> String {
let maybe_data = layout_el.borrow_layout_data();
let position = maybe_data.map_or(Point2D::zero(), |data| {
match (*data).flow_construction_result {
ConstructionResult::Flow(ref flow_ref, _) => flow_ref
.deref()
.base()
.stacking_relative_position
.to_point(),
// TODO(dzbarsky) search parents until we find node with a flow ref.
// https://github.com/servo/servo/issues/8307
_ => Point2D::zero(),
}
});
let position = Point2D::zero();
let property = match longhand_id {
LonghandId::Bottom => PositionProperty::Bottom,
LonghandId::Top => PositionProperty::Top,
@ -869,12 +794,11 @@ where
LonghandId::Height => PositionProperty::Height,
_ => unreachable!(),
};
let mut iterator = PositionRetrievingFragmentBorderBoxIterator::new(
let iterator = PositionRetrievingFragmentBorderBoxIterator::new(
requested_node.opaque(),
property,
position,
);
sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
iterator
.result
.map(|r| r.to_css_string())
@ -904,13 +828,12 @@ where
LonghandId::PaddingRight => (MarginPadding::Padding, Side::Right),
_ => unreachable!(),
};
let mut iterator = MarginRetrievingFragmentBorderBoxIterator::new(
let iterator = MarginRetrievingFragmentBorderBoxIterator::new(
requested_node.opaque(),
side,
margin_padding,
style.writing_mode,
);
sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
iterator
.result
.map(|r| r.to_css_string())
@ -920,12 +843,12 @@ where
LonghandId::Bottom | LonghandId::Top | LonghandId::Right | LonghandId::Left
if applies && positioned && style.get_box().display != Display::None =>
{
used_value_for_position_property(layout_el, layout_root, requested_node, longhand_id)
used_value_for_position_property(layout_el, requested_node, longhand_id)
},
LonghandId::Width | LonghandId::Height
if applies && style.get_box().display != Display::None =>
{
used_value_for_position_property(layout_el, layout_root, requested_node, longhand_id)
used_value_for_position_property(layout_el, requested_node, longhand_id)
},
// FIXME: implement used value computation for line-height
_ => style.computed_value_to_string(PropertyDeclarationId::Longhand(longhand_id)),
@ -934,10 +857,8 @@ where
pub fn process_offset_parent_query(
requested_node: OpaqueNode,
layout_root: &mut dyn Flow,
) -> OffsetParentResponse {
let mut iterator = ParentOffsetBorderBoxIterator::new(requested_node);
sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
let iterator = ParentOffsetBorderBoxIterator::new(requested_node);
let node_offset_box = iterator.node_offset_box;
let parent_info = iterator