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96 lines
3.4 KiB
Rust
96 lines
3.4 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use app_units::Au;
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use euclid::point::Point2D;
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use euclid::rect::Rect;
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use gfx_traits::LayerId;
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use script_traits::UntrustedNodeAddress;
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use style::properties::longhands::{margin_top, margin_right, margin_bottom, margin_left, overflow_x};
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/// Synchronous messages that script can send to layout.
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///
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/// In general, you should use messages to talk to Layout. Use the RPC interface
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/// if and only if the work is
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///
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/// 1) read-only with respect to LayoutThreadData,
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/// 2) small,
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/// 3) and really needs to be fast.
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pub trait LayoutRPC {
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/// Requests the dimensions of the content box, as in the `getBoundingClientRect()` call.
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fn content_box(&self) -> ContentBoxResponse;
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/// Requests the dimensions of all the content boxes, as in the `getClientRects()` call.
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fn content_boxes(&self) -> ContentBoxesResponse;
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/// Requests the geometry of this node. Used by APIs such as `clientTop`.
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fn node_geometry(&self) -> NodeGeometryResponse;
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/// Requests the overflow-x and overflow-y of this node. Used by `scrollTop` etc.
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fn node_overflow(&self) -> NodeOverflowResponse;
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/// Requests the scroll geometry of this node. Used by APIs such as `scrollTop`.
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fn node_scroll_area(&self) -> NodeGeometryResponse;
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/// Requests the layer id of this node. Used by APIs such as `scrollTop`
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fn node_layer_id(&self) -> NodeLayerIdResponse;
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/// Requests the node containing the point of interest
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fn hit_test(&self) -> HitTestResponse;
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/// Query layout for the resolved value of a given CSS property
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fn resolved_style(&self) -> ResolvedStyleResponse;
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fn offset_parent(&self) -> OffsetParentResponse;
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/// Query layout for the resolve values of the margin properties for an element.
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fn margin_style(&self) -> MarginStyleResponse;
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fn nodes_from_point(&self, page_point: Point2D<f32>, client_point: Point2D<f32>) -> Vec<UntrustedNodeAddress>;
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}
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pub struct ContentBoxResponse(pub Rect<Au>);
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pub struct ContentBoxesResponse(pub Vec<Rect<Au>>);
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pub struct NodeGeometryResponse {
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pub client_rect: Rect<i32>,
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}
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pub struct NodeOverflowResponse(pub Option<Point2D<overflow_x::computed_value::T>>);
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pub struct NodeLayerIdResponse {
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pub layer_id: LayerId,
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}
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pub struct HitTestResponse {
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pub node_address: Option<UntrustedNodeAddress>,
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}
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pub struct ResolvedStyleResponse(pub Option<String>);
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#[derive(Clone)]
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pub struct OffsetParentResponse {
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pub node_address: Option<UntrustedNodeAddress>,
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pub rect: Rect<Au>,
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}
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impl OffsetParentResponse {
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pub fn empty() -> OffsetParentResponse {
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OffsetParentResponse {
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node_address: None,
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rect: Rect::zero(),
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}
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}
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}
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#[derive(Clone)]
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pub struct MarginStyleResponse {
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pub top: margin_top::computed_value::T,
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pub right: margin_right::computed_value::T,
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pub bottom: margin_bottom::computed_value::T,
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pub left: margin_left::computed_value::T,
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}
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impl MarginStyleResponse {
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pub fn empty() -> MarginStyleResponse {
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MarginStyleResponse {
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top: margin_top::computed_value::T::Auto,
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right: margin_right::computed_value::T::Auto,
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bottom: margin_bottom::computed_value::T::Auto,
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left: margin_left::computed_value::T::Auto,
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}
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}
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}
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