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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
//! This module contains traits in script used generically in the rest of Servo.
//! The traits are here instead of in script so that these modules won't have
//! to depend on script.
#![deny(unsafe_code)]
pub mod message;
pub mod rpc;
pub mod wrapper_traits;
use atomic_refcell::AtomicRefCell;
use canvas_traits::canvas::{CanvasId, CanvasMsg};
use ipc_channel::ipc::IpcSender;
use libc::c_void;
use malloc_size_of_derive::MallocSizeOf;
use net_traits::image_cache::PendingImageId;
use script_traits::UntrustedNodeAddress;
use servo_url::{ImmutableOrigin, ServoUrl};
use std::any::Any;
use std::sync::atomic::AtomicIsize;
use style::data::ElementData;
use webrender_api::ImageKey;
#[derive(MallocSizeOf)]
pub struct StyleData {
/// Data that the style system associates with a node. When the
/// style system is being used standalone, this is all that hangs
/// off the node. This must be first to permit the various
/// transmutations between ElementData and PersistentLayoutData.
#[ignore_malloc_size_of = "This probably should not be ignored"]
pub element_data: AtomicRefCell<ElementData>,
/// Information needed during parallel traversals.
pub parallel: DomParallelInfo,
}
impl StyleData {
pub fn new() -> Self {
Self {
element_data: AtomicRefCell::new(ElementData::default()),
parallel: DomParallelInfo::new(),
}
}
}
pub type StyleAndOpaqueLayoutData = StyleAndGenericData<dyn Any + Send + Sync>;
#[derive(MallocSizeOf)]
pub struct StyleAndGenericData<T>
where
T: ?Sized,
{
/// The style data.
pub style_data: StyleData,
/// The opaque layout data.
#[ignore_malloc_size_of = "Trait objects are hard"]
pub generic_data: T,
}
impl StyleAndOpaqueLayoutData {
#[inline]
pub fn new<T>(style_data: StyleData, layout_data: T) -> Box<Self>
where
T: Any + Send + Sync,
{
Box::new(StyleAndGenericData {
style_data,
generic_data: layout_data,
})
}
}
/// Information that we need stored in each DOM node.
#[derive(MallocSizeOf)]
pub struct DomParallelInfo {
/// The number of children remaining to process during bottom-up traversal.
pub children_to_process: AtomicIsize,
}
impl DomParallelInfo {
pub fn new() -> DomParallelInfo {
DomParallelInfo {
children_to_process: AtomicIsize::new(0),
}
}
}
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum LayoutNodeType {
Element(LayoutElementType),
Text,
}
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum LayoutElementType {
Element,
HTMLBodyElement,
HTMLBRElement,
HTMLCanvasElement,
HTMLHtmlElement,
HTMLIFrameElement,
HTMLImageElement,
HTMLInputElement,
HTMLMediaElement,
HTMLObjectElement,
HTMLParagraphElement,
HTMLTableCellElement,
HTMLTableColElement,
HTMLTableElement,
HTMLTableRowElement,
HTMLTableSectionElement,
HTMLTextAreaElement,
SVGSVGElement,
}
pub enum HTMLCanvasDataSource {
WebGL(ImageKey),
Image(Option<IpcSender<CanvasMsg>>),
WebGPU(ImageKey),
}
pub struct HTMLCanvasData {
pub source: HTMLCanvasDataSource,
pub width: u32,
pub height: u32,
pub canvas_id: CanvasId,
}
pub struct SVGSVGData {
pub width: u32,
pub height: u32,
}
/// The address of a node known to be valid. These are sent from script to layout.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub struct TrustedNodeAddress(pub *const c_void);
#[allow(unsafe_code)]
unsafe impl Send for TrustedNodeAddress {}
/// Whether the pending image needs to be fetched or is waiting on an existing fetch.
pub enum PendingImageState {
Unrequested(ServoUrl),
PendingResponse,
}
/// The data associated with an image that is not yet present in the image cache.
/// Used by the script thread to hold on to DOM elements that need to be repainted
/// when an image fetch is complete.
pub struct PendingImage {
pub state: PendingImageState,
pub node: UntrustedNodeAddress,
pub id: PendingImageId,
pub origin: ImmutableOrigin,
}
pub struct HTMLMediaData {
pub current_frame: Option<(ImageKey, i32, i32)>,
}
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