Struct InitialPipelineState 

pub struct InitialPipelineState {

    pub id: PipelineId,
    pub browsing_context_id: BrowsingContextId,
    pub webview_id: WebViewId,
    pub parent_pipeline_id: Option<PipelineId>,
    pub opener: Option<BrowsingContextId>,
    pub script_to_constellation_chan: ScriptToConstellationChan,
    pub script_to_embedder_chan: ScriptToEmbedderChan,
    pub namespace_request_sender: GenericSender<PipelineNamespaceRequest>,
    pub background_monitor_register: Option<Box<dyn BackgroundHangMonitorRegister>>,
    pub background_hang_monitor_to_constellation_chan: GenericSender<HangMonitorAlert>,
    pub layout_factory: Arc<dyn LayoutFactory>,
    pub compositor_proxy: CompositorProxy,
    pub devtools_sender: Option<Sender<DevtoolsControlMsg>>,
    pub bluetooth_thread: IpcSender<BluetoothRequest>,
    pub system_font_service: Arc<SystemFontServiceProxy>,
    pub resource_threads: ResourceThreads,
    pub storage_threads: StorageThreads,
    pub time_profiler_chan: ProfilerChan,
    pub mem_profiler_chan: ProfilerChan,
    pub viewport_details: ViewportDetails,
    pub theme: Theme,
    pub pipeline_namespace_id: PipelineNamespaceId,
    pub event_loop: Option<Rc<EventLoop>>,
    pub load_data: LoadData,
    pub prev_throttled: bool,
    pub webgl_chan: Option<WebGLPipeline>,
    pub webxr_registry: Option<Registry>,
    pub player_context: WindowGLContext,
    pub broken_image_icon_data: Vec<u8>,
    pub user_content_manager: UserContentManager,
    pub privileged_urls: Vec<ServoUrl>,
    pub image_cache_factory: Arc<dyn ImageCacheFactory>,
}

Initial setup data needed to construct a pipeline.

DO NOT add any Senders to this unless you absolutely know what you’re doing, or pcwalton will have to rewrite your code. Use IPC senders instead.

Fields

id: PipelineId

The ID of the pipeline to create.

browsing_context_id: BrowsingContextId

The ID of the browsing context that contains this Pipeline.

webview_id: WebViewId

The ID of the top-level browsing context that contains this Pipeline.

parent_pipeline_id: Option<PipelineId>

The ID of the parent pipeline and frame type, if any. If None, this is the root.

opener: Option<BrowsingContextId>

script_to_constellation_chan: ScriptToConstellationChan

A channel to the associated constellation.

script_to_embedder_chan: ScriptToEmbedderChan

A channel to the embedder.

namespace_request_sender: GenericSender<PipelineNamespaceRequest>

A sender to request pipeline namespace ids.

background_monitor_register: Option<Box<dyn BackgroundHangMonitorRegister>>

A handle to register components for hang monitoring. None when in multiprocess mode.

background_hang_monitor_to_constellation_chan: GenericSender<HangMonitorAlert>

A channel for the background hang monitor to send messages to the constellation.

layout_factory: Arc<dyn LayoutFactory>

A fatory for creating layouts to be used by the ScriptThread.

compositor_proxy: CompositorProxy

A channel to the compositor.

devtools_sender: Option<Sender<DevtoolsControlMsg>>

A channel to the developer tools, if applicable.

bluetooth_thread: IpcSender<BluetoothRequest>

A channel to the bluetooth thread.

system_font_service: Arc<SystemFontServiceProxy>

A proxy to the system font service, responsible for managing the list of system fonts.

resource_threads: ResourceThreads

Channels to the resource-related threads.

storage_threads: StorageThreads

Channels to the storage-related threads.

time_profiler_chan: ProfilerChan

A channel to the time profiler thread.

mem_profiler_chan: ProfilerChan

A channel to the memory profiler thread.

viewport_details: ViewportDetails

The initial ViewportDetails to use when starting this new Pipeline.

theme: Theme

The initial Theme to use when starting this new Pipeline.

pipeline_namespace_id: PipelineNamespaceId

The ID of the pipeline namespace for this script thread.

event_loop: Option<Rc<EventLoop>>

The event loop to run in, if applicable.

load_data: LoadData

Information about the page to load.

prev_throttled: bool

Whether the browsing context in which pipeline is embedded is throttled, using less resources by stopping animations and running timers at a heavily limited rate. This field is only used to notify script and compositor threads after spawning a pipeline.

webgl_chan: Option<WebGLPipeline>

A channel to the WebGL thread.

webxr_registry: Option<Registry>

The XR device registry

player_context: WindowGLContext

Application window’s GL Context for Media player

broken_image_icon_data: Vec<u8>

The image bytes associated with the BrokenImageIcon embedder resource.

user_content_manager: UserContentManager

User content manager

privileged_urls: Vec<ServoUrl>

A list of URLs that can access privileged internal APIs.

image_cache_factory: Arc<dyn ImageCacheFactory>

The ImageCacheFactory used for the single-process mode.