forked from mirrors/gecko-dev
814d03f8f0
The design of initiating network requests from the image cache thread was simple, but it makes it difficult to implement image loading that conforms to the HTML specification. These changes make the implementation of HTMLImageElement responsible for network requests for `<img>` elements, and CSS-based images (background-image, bullets, etc.) are requested by the script thread to ensure that the layout thread does not attempt to retain unsafe pointers to DOM nodes during asynchronous operations. --- - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #7708 - [X] There are tests for these changes Source-Repo: https://github.com/servo/servo Source-Revision: 854d720b21dda68034233a25385c4f2564a4a2d5 --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 845215025ea28e20cf0372075841172a4ed5206c
101 lines
3.7 KiB
Rust
101 lines
3.7 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 http://mozilla.org/MPL/2.0/. */
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use PendingImage;
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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::ScrollRootId;
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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 scroll root id of this node. Used by APIs such as `scrollTop`
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fn node_scroll_root_id(&self) -> NodeScrollRootIdResponse;
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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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/// Requests the list of not-yet-loaded images that were encountered in the last reflow.
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fn pending_images(&self) -> Vec<PendingImage>;
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fn nodes_from_point(&self, page_point: Point2D<f32>, client_point: Point2D<f32>) -> Vec<UntrustedNodeAddress>;
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fn text_index(&self) -> TextIndexResponse;
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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 NodeOverflowResponse(pub Option<Point2D<overflow_x::computed_value::T>>);
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pub struct NodeScrollRootIdResponse(pub ScrollRootId);
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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 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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#[derive(Clone)]
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pub struct TextIndexResponse(pub Option<usize>);
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