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Add layout RPC query for getting an element's style

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This enables us to implement Element::has_css_layout_box() in a more
direct way, and also enables us to remove some of the existing more
specific queries.

Fixes #19811.
This commit is contained in:
Jon Leighton 2018-01-27 21:30:24 +01:00
parent c9ba16f9fb
commit fe583fc5d0
10 changed files with 88 additions and 136 deletions
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29
components/script_layout_interface/rpc.rs
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@ -5,7 +5,9 @@
use app_units::Au;
use euclid::{Point2D, Rect};
use script_traits::UntrustedNodeAddress;
use style::properties::longhands::{margin_top, margin_right, margin_bottom, margin_left, overflow_x};
use servo_arc::Arc;
use style::properties::ComputedValues;
use style::properties::longhands::overflow_x;
use webrender_api::ClipId;
/// Synchronous messages that script can send to layout.
@ -23,8 +25,6 @@ pub trait LayoutRPC {
fn content_boxes(&self) -> ContentBoxesResponse;
/// Requests the geometry of this node. Used by APIs such as `clientTop`.
fn node_geometry(&self) -> NodeGeometryResponse;
/// Requests the overflow-x and overflow-y of this node. Used by `scrollTop` etc.
fn node_overflow(&self) -> NodeOverflowResponse;
/// Requests the scroll geometry of this node. Used by APIs such as `scrollTop`.
fn node_scroll_area(&self) -> NodeGeometryResponse;
/// Requests the scroll root id of this node. Used by APIs such as `scrollTop`
@ -32,8 +32,9 @@ pub trait LayoutRPC {
/// Query layout for the resolved value of a given CSS property
fn resolved_style(&self) -> ResolvedStyleResponse;
fn offset_parent(&self) -> OffsetParentResponse;
/// Query layout for the resolve values of the margin properties for an element.
fn margin_style(&self) -> MarginStyleResponse;
/// Requests the styles for an element. Contains a `None` value if the element is in a `display:
/// none` subtree.
fn style(&self) -> StyleResponse;
fn text_index(&self) -> TextIndexResponse;
/// Requests the list of nodes from the given point.
fn nodes_from_point_response(&self) -> Vec<UntrustedNodeAddress>;
@ -70,23 +71,7 @@ impl OffsetParentResponse {
}
#[derive(Clone)]
pub struct MarginStyleResponse {
pub top: margin_top::computed_value::T,
pub right: margin_right::computed_value::T,
pub bottom: margin_bottom::computed_value::T,
pub left: margin_left::computed_value::T,
}
impl MarginStyleResponse {
pub fn empty() -> MarginStyleResponse {
MarginStyleResponse {
top: margin_top::computed_value::T::Auto,
right: margin_right::computed_value::T::Auto,
bottom: margin_bottom::computed_value::T::Auto,
left: margin_left::computed_value::T::Auto,
}
}
}
pub struct StyleResponse(pub Option<Arc<ComputedValues>>);
#[derive(Clone)]
pub struct TextIndexResponse(pub Option<usize>);