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https://github.com/servo/servo.git
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abca586e0a
Refactor the scrolling and scrollable area calculation on the window object, to make it better match the specification. This has some mild changes to behavior, but in general things work the same as they did before. This is mainly preparation for properly handling viewport propagation of the `overflow` property but seems to fix a few issues as well. There is one new failure in Layout 2020 regarding `position: sticky`, but this isn't a big deal because there is no support for `position: sticky` in Layout 2020 yet. Co-authored-by: Rakhi Sharma <atbrakhi@igalia.com>
75 lines
2.7 KiB
Rust
75 lines
2.7 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 https://mozilla.org/MPL/2.0/. */
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use app_units::Au;
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use euclid::default::Rect;
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use euclid::Size2D;
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use script_traits::UntrustedNodeAddress;
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use servo_arc::Arc;
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use style::properties::style_structs::Font;
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use style_traits::CSSPixel;
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use webrender_api::ExternalScrollId;
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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 scroll geometry of this node. Used by APIs such as `scrollTop`.
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fn scrolling_area(&self) -> NodeGeometryResponse;
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/// Requests the scroll id of this node. Used by APIs such as `scrollTop`
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fn node_scroll_id(&self) -> NodeScrollIdResponse;
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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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/// Query layout to get the resolved font style for canvas.
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fn resolved_font_style(&self) -> Option<Arc<Font>>;
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fn offset_parent(&self) -> OffsetParentResponse;
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fn text_index(&self) -> TextIndexResponse;
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/// Requests the list of nodes from the given point.
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fn nodes_from_point_response(&self) -> Vec<UntrustedNodeAddress>;
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/// Query layout to get the inner text for a given element.
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fn element_inner_text(&self) -> String;
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/// Get the dimensions of an iframe's inner window.
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fn inner_window_dimensions(&self) -> Option<Size2D<f32, CSSPixel>>;
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}
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pub struct ContentBoxResponse(pub Option<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 NodeScrollIdResponse(pub ExternalScrollId);
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pub struct ResolvedStyleResponse(pub 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 TextIndexResponse(pub Option<usize>);
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