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Remove more stuff from layout_2020
This commit is contained in:
Anthony Ramine
parent
9b4b02275e
commit
053e361e2f
8 changed files with 47 additions and 1079 deletions
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@ -6,35 +6,20 @@
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use crate::context::LayoutContext;
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use crate::display_list::items::{DisplayList, OpaqueNode, ScrollOffsetMap};
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use crate::display_list::IndexableText;
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use crate::fragment::{Fragment, FragmentBorderBoxIterator};
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use crate::opaque_node::OpaqueNodeMethods;
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use app_units::Au;
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use euclid::default::{Point2D, Rect, Size2D, Vector2D};
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use euclid::default::{Point2D, Rect};
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use ipc_channel::ipc::IpcSender;
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use msg::constellation_msg::PipelineId;
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use script_layout_interface::rpc::TextIndexResponse;
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use script_layout_interface::rpc::{ContentBoxResponse, ContentBoxesResponse, LayoutRPC};
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use script_layout_interface::rpc::{NodeGeometryResponse, NodeScrollIdResponse};
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use script_layout_interface::rpc::{OffsetParentResponse, ResolvedStyleResponse, StyleResponse};
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use script_layout_interface::wrapper_traits::{
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LayoutNode, ThreadSafeLayoutElement, ThreadSafeLayoutNode,
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};
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use script_layout_interface::StyleData;
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use script_layout_interface::{LayoutElementType, LayoutNodeType};
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use script_layout_interface::wrapper_traits::{LayoutNode, ThreadSafeLayoutNode};
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use script_traits::LayoutMsg as ConstellationMsg;
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use script_traits::UntrustedNodeAddress;
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use std::cmp::{max, min};
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use std::sync::{Arc, Mutex};
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use style::computed_values::display::T as Display;
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use style::computed_values::position::T as Position;
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use style::computed_values::visibility::T as Visibility;
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use style::context::{StyleContext, ThreadLocalStyleContext};
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use style::dom::TElement;
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use style::logical_geometry::{BlockFlowDirection, InlineBaseDirection, WritingMode};
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use style::properties::{style_structs, LonghandId, PropertyDeclarationId, PropertyId};
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use style::properties::PropertyId;
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use style::selector_parser::PseudoElement;
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use style_traits::ToCss;
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use webrender_api::ExternalScrollId;
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/// Mutable data belonging to the LayoutThread.
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@ -47,8 +32,6 @@ pub struct LayoutThreadData {
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/// The root stacking context.
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pub display_list: Option<DisplayList>,
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pub indexable_text: IndexableText,
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/// A queued response for the union of the content boxes of a node.
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pub content_box_response: Option<Rect<Au>>,
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@ -88,29 +71,6 @@ pub struct LayoutThreadData {
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pub struct LayoutRPCImpl(pub Arc<Mutex<LayoutThreadData>>);
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// https://drafts.csswg.org/cssom-view/#overflow-directions
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fn overflow_direction(writing_mode: &WritingMode) -> OverflowDirection {
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match (
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writing_mode.block_flow_direction(),
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writing_mode.inline_base_direction(),
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) {
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(BlockFlowDirection::TopToBottom, InlineBaseDirection::LeftToRight) |
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(BlockFlowDirection::LeftToRight, InlineBaseDirection::LeftToRight) => {
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OverflowDirection::RightAndDown
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},
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(BlockFlowDirection::TopToBottom, InlineBaseDirection::RightToLeft) |
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(BlockFlowDirection::RightToLeft, InlineBaseDirection::LeftToRight) => {
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OverflowDirection::LeftAndDown
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},
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(BlockFlowDirection::RightToLeft, InlineBaseDirection::RightToLeft) => {
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OverflowDirection::LeftAndUp
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},
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(BlockFlowDirection::LeftToRight, InlineBaseDirection::RightToLeft) => {
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OverflowDirection::RightAndUp
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},
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}
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}
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impl LayoutRPC for LayoutRPCImpl {
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// The neat thing here is that in order to answer the following two queries we only
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// need to compare nodes for equality. Thus we can safely work only with `OpaqueNode`.
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@ -189,428 +149,16 @@ impl LayoutRPC for LayoutRPCImpl {
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}
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}
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struct UnioningFragmentBorderBoxIterator {
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node_address: OpaqueNode,
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rect: Option<Rect<Au>>,
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pub fn process_content_box_request(_requested_node: OpaqueNode) -> Option<Rect<Au>> {
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None
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}
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impl UnioningFragmentBorderBoxIterator {
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fn new(node_address: OpaqueNode) -> UnioningFragmentBorderBoxIterator {
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UnioningFragmentBorderBoxIterator {
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node_address: node_address,
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rect: None,
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}
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}
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pub fn process_content_boxes_request(_requested_node: OpaqueNode) -> Vec<Rect<Au>> {
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vec![]
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}
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impl FragmentBorderBoxIterator for UnioningFragmentBorderBoxIterator {
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fn process(&mut self, _: &Fragment, _: i32, border_box: &Rect<Au>) {
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self.rect = match self.rect {
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Some(rect) => Some(rect.union(border_box)),
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None => Some(*border_box),
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};
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}
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fn should_process(&mut self, fragment: &Fragment) -> bool {
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fragment.contains_node(self.node_address)
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}
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}
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struct CollectingFragmentBorderBoxIterator {
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node_address: OpaqueNode,
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rects: Vec<Rect<Au>>,
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}
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impl CollectingFragmentBorderBoxIterator {
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fn new(node_address: OpaqueNode) -> CollectingFragmentBorderBoxIterator {
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CollectingFragmentBorderBoxIterator {
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node_address: node_address,
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rects: Vec::new(),
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}
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}
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}
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impl FragmentBorderBoxIterator for CollectingFragmentBorderBoxIterator {
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fn process(&mut self, _: &Fragment, _: i32, border_box: &Rect<Au>) {
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self.rects.push(*border_box);
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}
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fn should_process(&mut self, fragment: &Fragment) -> bool {
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fragment.contains_node(self.node_address)
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}
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}
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enum Side {
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Left,
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Right,
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Bottom,
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Top,
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}
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enum MarginPadding {
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Margin,
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Padding,
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}
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enum PositionProperty {
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Left,
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Right,
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Top,
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Bottom,
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Width,
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Height,
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}
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#[derive(Debug)]
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enum OverflowDirection {
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RightAndDown,
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LeftAndDown,
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LeftAndUp,
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RightAndUp,
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}
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struct PositionRetrievingFragmentBorderBoxIterator {
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node_address: OpaqueNode,
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result: Option<Au>,
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position: Point2D<Au>,
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property: PositionProperty,
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}
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impl PositionRetrievingFragmentBorderBoxIterator {
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fn new(
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node_address: OpaqueNode,
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property: PositionProperty,
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position: Point2D<Au>,
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) -> PositionRetrievingFragmentBorderBoxIterator {
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PositionRetrievingFragmentBorderBoxIterator {
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node_address: node_address,
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position: position,
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property: property,
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result: None,
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}
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}
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}
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impl FragmentBorderBoxIterator for PositionRetrievingFragmentBorderBoxIterator {
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fn process(&mut self, fragment: &Fragment, _: i32, border_box: &Rect<Au>) {
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let border_padding = fragment
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.border_padding
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.to_physical(fragment.style.writing_mode);
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self.result = Some(match self.property {
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PositionProperty::Left => self.position.x,
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PositionProperty::Top => self.position.y,
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PositionProperty::Width => border_box.size.width - border_padding.horizontal(),
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PositionProperty::Height => border_box.size.height - border_padding.vertical(),
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// TODO: the following 2 calculations are completely wrong.
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// They should return the difference between the parent's and this
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// fragment's border boxes.
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PositionProperty::Right => border_box.max_x() + self.position.x,
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PositionProperty::Bottom => border_box.max_y() + self.position.y,
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});
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}
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fn should_process(&mut self, fragment: &Fragment) -> bool {
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fragment.contains_node(self.node_address)
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}
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}
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struct MarginRetrievingFragmentBorderBoxIterator {
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node_address: OpaqueNode,
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result: Option<Au>,
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writing_mode: WritingMode,
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margin_padding: MarginPadding,
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side: Side,
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}
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impl MarginRetrievingFragmentBorderBoxIterator {
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fn new(
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node_address: OpaqueNode,
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side: Side,
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margin_padding: MarginPadding,
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writing_mode: WritingMode,
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) -> MarginRetrievingFragmentBorderBoxIterator {
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MarginRetrievingFragmentBorderBoxIterator {
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node_address: node_address,
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side: side,
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margin_padding: margin_padding,
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result: None,
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writing_mode: writing_mode,
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}
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}
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}
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impl FragmentBorderBoxIterator for MarginRetrievingFragmentBorderBoxIterator {
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fn process(&mut self, fragment: &Fragment, _: i32, _: &Rect<Au>) {
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let rect = match self.margin_padding {
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MarginPadding::Margin => &fragment.margin,
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MarginPadding::Padding => &fragment.border_padding,
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};
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self.result = Some(match self.side {
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Side::Left => rect.left(self.writing_mode),
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Side::Right => rect.right(self.writing_mode),
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Side::Bottom => rect.bottom(self.writing_mode),
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Side::Top => rect.top(self.writing_mode),
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});
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}
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fn should_process(&mut self, fragment: &Fragment) -> bool {
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fragment.contains_node(self.node_address)
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}
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}
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pub fn process_content_box_request(requested_node: OpaqueNode) -> Option<Rect<Au>> {
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UnioningFragmentBorderBoxIterator::new(requested_node).rect
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}
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pub fn process_content_boxes_request(requested_node: OpaqueNode) -> Vec<Rect<Au>> {
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// FIXME(pcwalton): This has not been updated to handle the stacking context relative
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// stuff. So the position is wrong in most cases.
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CollectingFragmentBorderBoxIterator::new(requested_node).rects
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}
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struct FragmentLocatingFragmentIterator {
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node_address: OpaqueNode,
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client_rect: Rect<i32>,
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}
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impl FragmentLocatingFragmentIterator {
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fn new(node_address: OpaqueNode) -> FragmentLocatingFragmentIterator {
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FragmentLocatingFragmentIterator {
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node_address: node_address,
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client_rect: Rect::zero(),
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}
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}
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}
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struct UnioningFragmentScrollAreaIterator {
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node_address: OpaqueNode,
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union_rect: Rect<i32>,
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origin_rect: Rect<i32>,
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level: Option<i32>,
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is_child: bool,
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overflow_direction: OverflowDirection,
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}
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impl UnioningFragmentScrollAreaIterator {
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fn new(node_address: OpaqueNode) -> UnioningFragmentScrollAreaIterator {
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UnioningFragmentScrollAreaIterator {
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node_address: node_address,
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union_rect: Rect::zero(),
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origin_rect: Rect::zero(),
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level: None,
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is_child: false,
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// FIXME(#20867)
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overflow_direction: OverflowDirection::RightAndDown,
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}
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}
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}
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struct NodeOffsetBoxInfo {
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offset: Point2D<Au>,
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rectangle: Rect<Au>,
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}
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struct ParentBorderBoxInfo {
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node_address: OpaqueNode,
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origin: Point2D<Au>,
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}
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struct ParentOffsetBorderBoxIterator {
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node_address: OpaqueNode,
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has_processed_node: bool,
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node_offset_box: Option<NodeOffsetBoxInfo>,
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parent_nodes: Vec<Option<ParentBorderBoxInfo>>,
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}
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impl ParentOffsetBorderBoxIterator {
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fn new(node_address: OpaqueNode) -> ParentOffsetBorderBoxIterator {
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ParentOffsetBorderBoxIterator {
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node_address: node_address,
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has_processed_node: false,
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node_offset_box: None,
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parent_nodes: Vec::new(),
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}
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}
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}
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impl FragmentBorderBoxIterator for FragmentLocatingFragmentIterator {
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fn process(&mut self, fragment: &Fragment, _: i32, border_box: &Rect<Au>) {
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let style_structs::Border {
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border_top_width: top_width,
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border_right_width: right_width,
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border_bottom_width: bottom_width,
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border_left_width: left_width,
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..
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} = *fragment.style.get_border();
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let (left_width, right_width) = (left_width.px(), right_width.px());
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let (top_width, bottom_width) = (top_width.px(), bottom_width.px());
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self.client_rect.origin.y = top_width as i32;
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self.client_rect.origin.x = left_width as i32;
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self.client_rect.size.width =
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(border_box.size.width.to_f32_px() - left_width - right_width) as i32;
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self.client_rect.size.height =
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(border_box.size.height.to_f32_px() - top_width - bottom_width) as i32;
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}
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fn should_process(&mut self, fragment: &Fragment) -> bool {
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fragment.node == self.node_address
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}
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}
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// https://drafts.csswg.org/cssom-view/#scrolling-area
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impl FragmentBorderBoxIterator for UnioningFragmentScrollAreaIterator {
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fn process(&mut self, fragment: &Fragment, level: i32, border_box: &Rect<Au>) {
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// In cases in which smaller child elements contain less padding than the parent
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// the a union of the two elements padding rectangles could result in an unwanted
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// increase in size. To work around this, we store the original elements padding
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// rectangle as `origin_rect` and the union of all child elements padding and
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// margin rectangles as `union_rect`.
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let style_structs::Border {
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border_top_width: top_border,
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border_right_width: right_border,
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border_bottom_width: bottom_border,
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border_left_width: left_border,
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..
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} = *fragment.style.get_border();
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let (left_border, right_border) = (left_border.px(), right_border.px());
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let (top_border, bottom_border) = (top_border.px(), bottom_border.px());
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let right_padding = (border_box.size.width.to_f32_px() - right_border - left_border) as i32;
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let bottom_padding =
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(border_box.size.height.to_f32_px() - bottom_border - top_border) as i32;
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let top_padding = top_border as i32;
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let left_padding = left_border as i32;
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match self.level {
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Some(start_level) if level <= start_level => {
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self.is_child = false;
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},
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Some(_) => {
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let padding = Rect::new(
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Point2D::new(left_padding, top_padding),
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Size2D::new(right_padding, bottom_padding),
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);
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let top_margin = fragment.margin.top(fragment.style.writing_mode).to_px();
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let left_margin = fragment.margin.left(fragment.style.writing_mode).to_px();
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let bottom_margin = fragment.margin.bottom(fragment.style.writing_mode).to_px();
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let right_margin = fragment.margin.right(fragment.style.writing_mode).to_px();
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let margin = Rect::new(
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Point2D::new(left_margin, top_margin),
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Size2D::new(right_margin, bottom_margin),
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);
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self.union_rect = self.union_rect.union(&margin).union(&padding);
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},
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None => {
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self.level = Some(level);
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self.is_child = true;
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self.overflow_direction = overflow_direction(&fragment.style.writing_mode);
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self.origin_rect = Rect::new(
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Point2D::new(left_padding, top_padding),
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Size2D::new(right_padding, bottom_padding),
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);
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},
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};
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}
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fn should_process(&mut self, fragment: &Fragment) -> bool {
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fragment.contains_node(self.node_address) || self.is_child
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}
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}
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// https://drafts.csswg.org/cssom-view/#extensions-to-the-htmlelement-interface
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impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
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fn process(&mut self, fragment: &Fragment, level: i32, border_box: &Rect<Au>) {
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if self.node_offset_box.is_none() {
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// We haven't found the node yet, so we're still looking
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// for its parent. Remove all nodes at this level or
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// higher, as they can't be parents of this node.
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self.parent_nodes.truncate(level as usize);
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assert_eq!(
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self.parent_nodes.len(),
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level as usize,
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"Skipped at least one level in the flow tree!"
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);
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}
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if !fragment.is_primary_fragment() {
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// This fragment doesn't correspond to anything worth
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// taking measurements from.
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if self.node_offset_box.is_none() {
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// If this is the only fragment in the flow, we need to
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// do this to avoid failing the above assertion.
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self.parent_nodes.push(None);
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}
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return;
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}
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if fragment.node == self.node_address {
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// Found the fragment in the flow tree that matches the
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// DOM node being looked for.
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assert!(
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self.node_offset_box.is_none(),
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"Node was being treated as inline, but it has an associated fragment!"
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);
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self.has_processed_node = true;
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self.node_offset_box = Some(NodeOffsetBoxInfo {
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offset: border_box.origin,
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rectangle: *border_box,
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});
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// offsetParent returns null if the node is fixed.
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if fragment.style.get_box().position == Position::Fixed {
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self.parent_nodes.clear();
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}
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} else if self.node_offset_box.is_none() {
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// TODO(gw): Is there a less fragile way of checking whether this
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// fragment is the body element, rather than just checking that
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// it's at level 1 (below the root node)?
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let is_body_element = level == 1;
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let is_valid_parent = match (
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is_body_element,
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fragment.style.get_box().position,
|
||||
&fragment.specific,
|
||||
) {
|
||||
// Spec says it's valid if any of these are true:
|
||||
// 1) Is the body element
|
||||
// 2) Is static position *and* is a table or table cell
|
||||
// 3) Is not static position
|
||||
(true, _, _) |
|
||||
(false, Position::Absolute, _) |
|
||||
(false, Position::Relative, _) |
|
||||
(false, Position::Fixed, _) => true,
|
||||
|
||||
// Otherwise, it's not a valid parent
|
||||
(false, Position::Static, _) => false,
|
||||
};
|
||||
|
||||
let parent_info = if is_valid_parent {
|
||||
let border_width = fragment
|
||||
.border_width()
|
||||
.to_physical(fragment.style.writing_mode);
|
||||
|
||||
Some(ParentBorderBoxInfo {
|
||||
node_address: fragment.node,
|
||||
origin: border_box.origin + Vector2D::new(border_width.left, border_width.top),
|
||||
})
|
||||
} else {
|
||||
None
|
||||
};
|
||||
|
||||
self.parent_nodes.push(parent_info);
|
||||
}
|
||||
}
|
||||
|
||||
fn should_process(&mut self, _: &Fragment) -> bool {
|
||||
!self.has_processed_node
|
||||
}
|
||||
}
|
||||
|
||||
pub fn process_node_geometry_request(requested_node: OpaqueNode) -> Rect<i32> {
|
||||
FragmentLocatingFragmentIterator::new(requested_node).client_rect
|
||||
pub fn process_node_geometry_request(_requested_node: OpaqueNode) -> Rect<i32> {
|
||||
Rect::zero()
|
||||
}
|
||||
|
||||
pub fn process_node_scroll_id_request<N: LayoutNode>(
|
||||
|
|
@ -622,380 +170,37 @@ 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) -> Rect<i32> {
|
||||
let iterator = UnioningFragmentScrollAreaIterator::new(requested_node);
|
||||
match iterator.overflow_direction {
|
||||
OverflowDirection::RightAndDown => {
|
||||
let right = max(
|
||||
iterator.union_rect.size.width,
|
||||
iterator.origin_rect.size.width,
|
||||
);
|
||||
let bottom = max(
|
||||
iterator.union_rect.size.height,
|
||||
iterator.origin_rect.size.height,
|
||||
);
|
||||
Rect::new(iterator.origin_rect.origin, Size2D::new(right, bottom))
|
||||
},
|
||||
OverflowDirection::LeftAndDown => {
|
||||
let bottom = max(
|
||||
iterator.union_rect.size.height,
|
||||
iterator.origin_rect.size.height,
|
||||
);
|
||||
let left = min(iterator.union_rect.origin.x, iterator.origin_rect.origin.x);
|
||||
Rect::new(
|
||||
Point2D::new(left, iterator.origin_rect.origin.y),
|
||||
Size2D::new(iterator.origin_rect.size.width, bottom),
|
||||
)
|
||||
},
|
||||
OverflowDirection::LeftAndUp => {
|
||||
let top = min(iterator.union_rect.origin.y, iterator.origin_rect.origin.y);
|
||||
let left = min(iterator.union_rect.origin.x, iterator.origin_rect.origin.x);
|
||||
Rect::new(Point2D::new(left, top), iterator.origin_rect.size)
|
||||
},
|
||||
OverflowDirection::RightAndUp => {
|
||||
let top = min(iterator.union_rect.origin.y, iterator.origin_rect.origin.y);
|
||||
let right = max(
|
||||
iterator.union_rect.size.width,
|
||||
iterator.origin_rect.size.width,
|
||||
);
|
||||
Rect::new(
|
||||
Point2D::new(iterator.origin_rect.origin.x, top),
|
||||
Size2D::new(right, iterator.origin_rect.size.height),
|
||||
)
|
||||
},
|
||||
}
|
||||
pub fn process_node_scroll_area_request(_requested_node: OpaqueNode) -> Rect<i32> {
|
||||
Rect::zero()
|
||||
}
|
||||
|
||||
/// Return the resolved value of property for a given (pseudo)element.
|
||||
/// <https://drafts.csswg.org/cssom/#resolved-value>
|
||||
pub fn process_resolved_style_request<'a, N>(
|
||||
context: &LayoutContext,
|
||||
node: N,
|
||||
pseudo: &Option<PseudoElement>,
|
||||
property: &PropertyId,
|
||||
_context: &LayoutContext,
|
||||
_node: N,
|
||||
_pseudo: &Option<PseudoElement>,
|
||||
_property: &PropertyId,
|
||||
) -> String
|
||||
where
|
||||
N: LayoutNode,
|
||||
{
|
||||
use style::stylist::RuleInclusion;
|
||||
use style::traversal::resolve_style;
|
||||
|
||||
let element = node.as_element().unwrap();
|
||||
|
||||
// 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);
|
||||
}
|
||||
|
||||
// In a display: none subtree. No pseudo-element exists.
|
||||
if pseudo.is_some() {
|
||||
return String::new();
|
||||
}
|
||||
|
||||
let mut tlc = ThreadLocalStyleContext::new(&context.style_context);
|
||||
let mut context = StyleContext {
|
||||
shared: &context.style_context,
|
||||
thread_local: &mut tlc,
|
||||
};
|
||||
|
||||
let styles = resolve_style(&mut context, element, RuleInclusion::All, pseudo.as_ref());
|
||||
let style = styles.primary();
|
||||
let longhand_id = match *property {
|
||||
PropertyId::LonghandAlias(id, _) | PropertyId::Longhand(id) => id,
|
||||
// Firefox returns blank strings for the computed value of shorthands,
|
||||
// so this should be web-compatible.
|
||||
PropertyId::ShorthandAlias(..) | PropertyId::Shorthand(_) => return String::new(),
|
||||
PropertyId::Custom(ref name) => {
|
||||
return style.computed_value_to_string(PropertyDeclarationId::Custom(name));
|
||||
},
|
||||
};
|
||||
|
||||
// No need to care about used values here, since we're on a display: none
|
||||
// subtree, use the resolved value.
|
||||
style.computed_value_to_string(PropertyDeclarationId::Longhand(longhand_id))
|
||||
"".to_owned()
|
||||
}
|
||||
|
||||
/// The primary resolution logic, which assumes that the element is styled.
|
||||
fn process_resolved_style_request_internal<'a, N>(
|
||||
requested_node: N,
|
||||
pseudo: &Option<PseudoElement>,
|
||||
property: &PropertyId,
|
||||
) -> String
|
||||
where
|
||||
N: LayoutNode,
|
||||
{
|
||||
let layout_el = requested_node.to_threadsafe().as_element().unwrap();
|
||||
let layout_el = match *pseudo {
|
||||
Some(PseudoElement::Before) => layout_el.get_before_pseudo(),
|
||||
Some(PseudoElement::After) => layout_el.get_after_pseudo(),
|
||||
Some(PseudoElement::DetailsSummary) |
|
||||
Some(PseudoElement::DetailsContent) |
|
||||
Some(PseudoElement::Selection) => None,
|
||||
// FIXME(emilio): What about the other pseudos? Probably they shouldn't
|
||||
// just return the element's style!
|
||||
_ => Some(layout_el),
|
||||
};
|
||||
|
||||
let layout_el = match layout_el {
|
||||
None => {
|
||||
// The pseudo doesn't exist, return nothing. Chrome seems to query
|
||||
// the element itself in this case, Firefox uses the resolved value.
|
||||
// https://www.w3.org/Bugs/Public/show_bug.cgi?id=29006
|
||||
return String::new();
|
||||
},
|
||||
Some(layout_el) => layout_el,
|
||||
};
|
||||
|
||||
let style = &*layout_el.resolved_style();
|
||||
let longhand_id = match *property {
|
||||
PropertyId::LonghandAlias(id, _) | PropertyId::Longhand(id) => id,
|
||||
// Firefox returns blank strings for the computed value of shorthands,
|
||||
// so this should be web-compatible.
|
||||
PropertyId::ShorthandAlias(..) | PropertyId::Shorthand(_) => return String::new(),
|
||||
PropertyId::Custom(ref name) => {
|
||||
return style.computed_value_to_string(PropertyDeclarationId::Custom(name));
|
||||
},
|
||||
};
|
||||
|
||||
let positioned = match style.get_box().position {
|
||||
Position::Relative | Position::Fixed | Position::Absolute => true,
|
||||
_ => false,
|
||||
};
|
||||
|
||||
//TODO: determine whether requested property applies to the element.
|
||||
// eg. width does not apply to non-replaced inline elements.
|
||||
// Existing browsers disagree about when left/top/right/bottom apply
|
||||
// (Chrome seems to think they never apply and always returns resolved values).
|
||||
// There are probably other quirks.
|
||||
let applies = true;
|
||||
|
||||
fn used_value_for_position_property<N: LayoutNode>(
|
||||
_layout_el: <N::ConcreteThreadSafeLayoutNode as ThreadSafeLayoutNode>::ConcreteThreadSafeLayoutElement,
|
||||
requested_node: N,
|
||||
longhand_id: LonghandId,
|
||||
) -> String {
|
||||
let position = Point2D::zero();
|
||||
let property = match longhand_id {
|
||||
LonghandId::Bottom => PositionProperty::Bottom,
|
||||
LonghandId::Top => PositionProperty::Top,
|
||||
LonghandId::Left => PositionProperty::Left,
|
||||
LonghandId::Right => PositionProperty::Right,
|
||||
LonghandId::Width => PositionProperty::Width,
|
||||
LonghandId::Height => PositionProperty::Height,
|
||||
_ => unreachable!(),
|
||||
};
|
||||
let iterator = PositionRetrievingFragmentBorderBoxIterator::new(
|
||||
requested_node.opaque(),
|
||||
property,
|
||||
position,
|
||||
);
|
||||
iterator
|
||||
.result
|
||||
.map(|r| r.to_css_string())
|
||||
.unwrap_or(String::new())
|
||||
}
|
||||
|
||||
// TODO: we will return neither the computed nor used value for margin and padding.
|
||||
match longhand_id {
|
||||
LonghandId::MarginBottom |
|
||||
LonghandId::MarginTop |
|
||||
LonghandId::MarginLeft |
|
||||
LonghandId::MarginRight |
|
||||
LonghandId::PaddingBottom |
|
||||
LonghandId::PaddingTop |
|
||||
LonghandId::PaddingLeft |
|
||||
LonghandId::PaddingRight
|
||||
if applies && style.get_box().display != Display::None =>
|
||||
{
|
||||
let (margin_padding, side) = match longhand_id {
|
||||
LonghandId::MarginBottom => (MarginPadding::Margin, Side::Bottom),
|
||||
LonghandId::MarginTop => (MarginPadding::Margin, Side::Top),
|
||||
LonghandId::MarginLeft => (MarginPadding::Margin, Side::Left),
|
||||
LonghandId::MarginRight => (MarginPadding::Margin, Side::Right),
|
||||
LonghandId::PaddingBottom => (MarginPadding::Padding, Side::Bottom),
|
||||
LonghandId::PaddingTop => (MarginPadding::Padding, Side::Top),
|
||||
LonghandId::PaddingLeft => (MarginPadding::Padding, Side::Left),
|
||||
LonghandId::PaddingRight => (MarginPadding::Padding, Side::Right),
|
||||
_ => unreachable!(),
|
||||
};
|
||||
let iterator = MarginRetrievingFragmentBorderBoxIterator::new(
|
||||
requested_node.opaque(),
|
||||
side,
|
||||
margin_padding,
|
||||
style.writing_mode,
|
||||
);
|
||||
iterator
|
||||
.result
|
||||
.map(|r| r.to_css_string())
|
||||
.unwrap_or(String::new())
|
||||
}
|
||||
|
||||
LonghandId::Bottom | LonghandId::Top | LonghandId::Right | LonghandId::Left
|
||||
if applies && positioned && style.get_box().display != Display::None =>
|
||||
{
|
||||
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, requested_node, longhand_id)
|
||||
},
|
||||
// FIXME: implement used value computation for line-height
|
||||
_ => style.computed_value_to_string(PropertyDeclarationId::Longhand(longhand_id)),
|
||||
}
|
||||
pub fn process_offset_parent_query(_requested_node: OpaqueNode) -> OffsetParentResponse {
|
||||
OffsetParentResponse::empty()
|
||||
}
|
||||
|
||||
pub fn process_offset_parent_query(requested_node: OpaqueNode) -> OffsetParentResponse {
|
||||
let iterator = ParentOffsetBorderBoxIterator::new(requested_node);
|
||||
|
||||
let node_offset_box = iterator.node_offset_box;
|
||||
let parent_info = iterator
|
||||
.parent_nodes
|
||||
.into_iter()
|
||||
.rev()
|
||||
.filter_map(|info| info)
|
||||
.next();
|
||||
match (node_offset_box, parent_info) {
|
||||
(Some(node_offset_box), Some(parent_info)) => {
|
||||
let origin = node_offset_box.offset - parent_info.origin.to_vector();
|
||||
let size = node_offset_box.rectangle.size;
|
||||
OffsetParentResponse {
|
||||
node_address: Some(parent_info.node_address.to_untrusted_node_address()),
|
||||
rect: Rect::new(origin, size),
|
||||
}
|
||||
},
|
||||
_ => OffsetParentResponse::empty(),
|
||||
}
|
||||
}
|
||||
|
||||
pub fn process_style_query<N: LayoutNode>(requested_node: N) -> StyleResponse {
|
||||
let element = requested_node.as_element().unwrap();
|
||||
let data = element.borrow_data();
|
||||
|
||||
StyleResponse(data.map(|d| d.styles.primary().clone()))
|
||||
}
|
||||
|
||||
enum InnerTextItem {
|
||||
Text(String),
|
||||
RequiredLineBreakCount(u32),
|
||||
pub fn process_style_query<N: LayoutNode>(_requested_node: N) -> StyleResponse {
|
||||
StyleResponse(None)
|
||||
}
|
||||
|
||||
// https://html.spec.whatwg.org/multipage/#the-innertext-idl-attribute
|
||||
pub fn process_element_inner_text_query<N: LayoutNode>(
|
||||
node: N,
|
||||
indexable_text: &IndexableText,
|
||||
) -> String {
|
||||
// Step 1.
|
||||
let mut results = Vec::new();
|
||||
// Step 2.
|
||||
inner_text_collection_steps(node, indexable_text, &mut results);
|
||||
let mut max_req_line_break_count = 0;
|
||||
let mut inner_text = Vec::new();
|
||||
for item in results {
|
||||
match item {
|
||||
InnerTextItem::Text(s) => {
|
||||
if max_req_line_break_count > 0 {
|
||||
// Step 5.
|
||||
for _ in 0..max_req_line_break_count {
|
||||
inner_text.push("\u{000A}".to_owned());
|
||||
}
|
||||
max_req_line_break_count = 0;
|
||||
}
|
||||
// Step 3.
|
||||
if !s.is_empty() {
|
||||
inner_text.push(s.to_owned());
|
||||
}
|
||||
},
|
||||
InnerTextItem::RequiredLineBreakCount(count) => {
|
||||
// Step 4.
|
||||
if inner_text.len() == 0 {
|
||||
// Remove required line break count at the start.
|
||||
continue;
|
||||
}
|
||||
// Store the count if it's the max of this run,
|
||||
// but it may be ignored if no text item is found afterwards,
|
||||
// which means that these are consecutive line breaks at the end.
|
||||
if count > max_req_line_break_count {
|
||||
max_req_line_break_count = count;
|
||||
}
|
||||
},
|
||||
}
|
||||
}
|
||||
inner_text.into_iter().collect()
|
||||
pub fn process_element_inner_text_query<N: LayoutNode>(_node: N) -> String {
|
||||
"".to_owned()
|
||||
}
|
||||
|
||||
// https://html.spec.whatwg.org/multipage/#inner-text-collection-steps
|
||||
#[allow(unsafe_code)]
|
||||
fn inner_text_collection_steps<N: LayoutNode>(
|
||||
node: N,
|
||||
indexable_text: &IndexableText,
|
||||
results: &mut Vec<InnerTextItem>,
|
||||
) {
|
||||
let mut items = Vec::new();
|
||||
for child in node.traverse_preorder() {
|
||||
let node = match child.type_id() {
|
||||
LayoutNodeType::Text => child.parent_node().unwrap(),
|
||||
_ => child,
|
||||
};
|
||||
|
||||
let element_data = unsafe {
|
||||
node.get_style_and_layout_data()
|
||||
.map(|d| &(*(d.ptr.as_ptr() as *mut StyleData)).element_data)
|
||||
};
|
||||
|
||||
if element_data.is_none() {
|
||||
continue;
|
||||
}
|
||||
|
||||
let style = match element_data.unwrap().borrow().styles.get_primary() {
|
||||
None => continue,
|
||||
Some(style) => style.clone(),
|
||||
};
|
||||
|
||||
// Step 2.
|
||||
if style.get_inherited_box().visibility != Visibility::Visible {
|
||||
continue;
|
||||
}
|
||||
|
||||
// Step 3.
|
||||
let display = style.get_box().display;
|
||||
if !child.is_connected() || display == Display::None {
|
||||
continue;
|
||||
}
|
||||
|
||||
match child.type_id() {
|
||||
LayoutNodeType::Text => {
|
||||
// Step 4.
|
||||
if let Some(text_content) = indexable_text.get(child.opaque()) {
|
||||
for content in text_content {
|
||||
items.push(InnerTextItem::Text(content.text_run.text.to_string()));
|
||||
}
|
||||
}
|
||||
},
|
||||
LayoutNodeType::Element(LayoutElementType::HTMLBRElement) => {
|
||||
// Step 5.
|
||||
items.push(InnerTextItem::Text(String::from(
|
||||
"\u{000A}", /* line feed */
|
||||
)));
|
||||
},
|
||||
LayoutNodeType::Element(LayoutElementType::HTMLParagraphElement) => {
|
||||
// Step 8.
|
||||
items.insert(0, InnerTextItem::RequiredLineBreakCount(2));
|
||||
items.push(InnerTextItem::RequiredLineBreakCount(2));
|
||||
},
|
||||
_ => {},
|
||||
}
|
||||
|
||||
match display {
|
||||
Display::Block => {
|
||||
// Step 9.
|
||||
items.insert(0, InnerTextItem::RequiredLineBreakCount(1));
|
||||
items.push(InnerTextItem::RequiredLineBreakCount(1));
|
||||
},
|
||||
_ => {},
|
||||
}
|
||||
}
|
||||
|
||||
results.append(&mut items);
|
||||
pub fn process_text_index_request(_node: OpaqueNode, _point: Point2D<Au>) -> TextIndexResponse {
|
||||
TextIndexResponse(None)
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue