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servo/components/script/dom/window.rs
Martin Robinson 54b5c7b632
compositing: Move image output and shutdown management out of the compositor (#35538) 
This is a step toward the renderer-per-WebView goal. It moves various
details out of `IOCompositor`.

- Image output: This is moved to servoshell as now applications can
  access the image contents of a `WebView` via
  `RenderingContext::read_to_image`. Most options for this are moved to
  `ServoShellPreferences` apart from `wait_for_stable_image` as this
  requires a specific kind of coordination in the `ScriptThread` that is
  also very expensive. Instead, paint is now simply delayed until a
  stable image is reached and `WebView::paint()` returns a boolean.
  Maybe this can be revisited in the future.
- Shutdown: Shutdown is now managed by libservo itself. Shutdown state
  is shared between the compositor and `Servo` instance. In the future,
  this sharing might be unecessary.
- `CompositeTarget` has been removed entirely. This no longer needs to
   be passed when creating a Servo instance.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Ngo Iok Ui (Wu Yu Wei) <yuweiwu@pm.me>
2025-02-20 18:27:49 +00:00

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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/. */
use std::borrow::{Cow, ToOwned};
use std::cell::{Cell, RefCell, RefMut};
use std::cmp;
use std::collections::hash_map::Entry;
use std::collections::{HashMap, HashSet};
use std::default::Default;
use std::io::{stderr, stdout, Write};
use std::rc::Rc;
use std::sync::{Arc, Mutex};
use std::time::{Duration, Instant};
use app_units::Au;
use backtrace::Backtrace;
use base::cross_process_instant::CrossProcessInstant;
use base::id::{BrowsingContextId, PipelineId, WebViewId};
use base64::Engine;
#[cfg(feature = "bluetooth")]
use bluetooth_traits::BluetoothRequest;
use canvas_traits::webgl::WebGLChan;
use crossbeam_channel::{unbounded, Sender};
use cssparser::{Parser, ParserInput, SourceLocation};
use devtools_traits::{ScriptToDevtoolsControlMsg, TimelineMarker, TimelineMarkerType};
use dom_struct::dom_struct;
use embedder_traits::{EmbedderMsg, PromptDefinition, PromptOrigin, PromptResult, Theme};
use euclid::default::{Point2D as UntypedPoint2D, Rect as UntypedRect};
use euclid::{Point2D, Rect, Scale, Size2D, Vector2D};
use fonts::FontContext;
use ipc_channel::ipc::{self, IpcSender};
use js::conversions::ToJSValConvertible;
use js::glue::DumpJSStack;
use js::jsapi::{
GCReason, Heap, JSAutoRealm, JSContext as RawJSContext, JSObject, JSPROP_ENUMERATE, JS_GC,
};
use js::jsval::{NullValue, UndefinedValue};
use js::rust::wrappers::JS_DefineProperty;
use js::rust::{
CustomAutoRooter, CustomAutoRooterGuard, HandleObject, HandleValue, MutableHandleObject,
MutableHandleValue,
};
use malloc_size_of::MallocSizeOf;
use media::WindowGLContext;
use net_traits::image_cache::{
ImageCache, ImageResponder, ImageResponse, PendingImageId, PendingImageResponse,
};
use net_traits::storage_thread::StorageType;
use net_traits::ResourceThreads;
use num_traits::ToPrimitive;
use profile_traits::ipc as ProfiledIpc;
use profile_traits::mem::ProfilerChan as MemProfilerChan;
use profile_traits::time::ProfilerChan as TimeProfilerChan;
use script_layout_interface::{
combine_id_with_fragment_type, FragmentType, Layout, PendingImageState, QueryMsg, Reflow,
ReflowGoal, ReflowRequest, TrustedNodeAddress,
};
use script_traits::webdriver_msg::{WebDriverJSError, WebDriverJSResult};
use script_traits::{
DocumentState, LoadData, LoadOrigin, NavigationHistoryBehavior, ScriptMsg, ScriptThreadMessage,
ScriptToConstellationChan, ScrollState, StructuredSerializedData, WindowSizeData,
WindowSizeType,
};
use selectors::attr::CaseSensitivity;
use servo_arc::Arc as ServoArc;
use servo_atoms::Atom;
use servo_config::{opts, pref};
use servo_geometry::{f32_rect_to_au_rect, DeviceIndependentIntRect, MaxRect};
use servo_url::{ImmutableOrigin, MutableOrigin, ServoUrl};
use style::dom::OpaqueNode;
use style::error_reporting::{ContextualParseError, ParseErrorReporter};
use style::media_queries;
use style::parser::ParserContext as CssParserContext;
use style::properties::style_structs::Font;
use style::properties::PropertyId;
use style::queries::values::PrefersColorScheme;
use style::selector_parser::PseudoElement;
use style::str::HTML_SPACE_CHARACTERS;
use style::stylesheets::{CssRuleType, Origin, UrlExtraData};
use style_traits::{CSSPixel, ParsingMode};
use url::Position;
use webrender_api::units::{DevicePixel, LayoutPixel};
use webrender_api::{DocumentId, ExternalScrollId};
use webrender_traits::CrossProcessCompositorApi;
use super::bindings::codegen::Bindings::MessagePortBinding::StructuredSerializeOptions;
use super::bindings::trace::HashMapTracedValues;
use crate::dom::bindings::cell::{DomRefCell, Ref};
use crate::dom::bindings::codegen::Bindings::DocumentBinding::{
DocumentMethods, DocumentReadyState, NamedPropertyValue,
};
use crate::dom::bindings::codegen::Bindings::HTMLIFrameElementBinding::HTMLIFrameElementMethods;
use crate::dom::bindings::codegen::Bindings::HistoryBinding::History_Binding::HistoryMethods;
use crate::dom::bindings::codegen::Bindings::ImageBitmapBinding::{
ImageBitmapOptions, ImageBitmapSource,
};
use crate::dom::bindings::codegen::Bindings::MediaQueryListBinding::MediaQueryList_Binding::MediaQueryListMethods;
use crate::dom::bindings::codegen::Bindings::RequestBinding::RequestInit;
use crate::dom::bindings::codegen::Bindings::VoidFunctionBinding::VoidFunction;
use crate::dom::bindings::codegen::Bindings::WindowBinding::{
self, FrameRequestCallback, ScrollBehavior, ScrollToOptions, WindowMethods,
WindowPostMessageOptions,
};
use crate::dom::bindings::codegen::UnionTypes::{RequestOrUSVString, StringOrFunction};
use crate::dom::bindings::error::{Error, ErrorResult, Fallible};
use crate::dom::bindings::inheritance::{Castable, ElementTypeId, HTMLElementTypeId, NodeTypeId};
use crate::dom::bindings::num::Finite;
use crate::dom::bindings::refcounted::Trusted;
use crate::dom::bindings::reflector::{DomGlobal, DomObject};
use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
use crate::dom::bindings::str::{DOMString, USVString};
use crate::dom::bindings::structuredclone;
use crate::dom::bindings::trace::{CustomTraceable, JSTraceable, RootedTraceableBox};
use crate::dom::bindings::utils::GlobalStaticData;
use crate::dom::bindings::weakref::DOMTracker;
#[cfg(feature = "bluetooth")]
use crate::dom::bluetooth::BluetoothExtraPermissionData;
use crate::dom::crypto::Crypto;
use crate::dom::cssstyledeclaration::{CSSModificationAccess, CSSStyleDeclaration, CSSStyleOwner};
use crate::dom::customelementregistry::CustomElementRegistry;
use crate::dom::document::{AnimationFrameCallback, Document, ReflowTriggerCondition};
use crate::dom::element::Element;
use crate::dom::event::{Event, EventBubbles, EventCancelable, EventStatus};
use crate::dom::eventtarget::EventTarget;
use crate::dom::globalscope::GlobalScope;
use crate::dom::hashchangeevent::HashChangeEvent;
use crate::dom::history::History;
use crate::dom::htmlcollection::{CollectionFilter, HTMLCollection};
use crate::dom::htmliframeelement::HTMLIFrameElement;
use crate::dom::location::Location;
use crate::dom::mediaquerylist::{MediaQueryList, MediaQueryListMatchState};
use crate::dom::mediaquerylistevent::MediaQueryListEvent;
use crate::dom::messageevent::MessageEvent;
use crate::dom::navigator::Navigator;
use crate::dom::node::{from_untrusted_node_address, Node, NodeDamage, NodeTraits};
use crate::dom::performance::Performance;
use crate::dom::promise::Promise;
use crate::dom::screen::Screen;
use crate::dom::selection::Selection;
use crate::dom::storage::Storage;
#[cfg(feature = "bluetooth")]
use crate::dom::testrunner::TestRunner;
use crate::dom::types::UIEvent;
use crate::dom::webglrenderingcontext::WebGLCommandSender;
#[cfg(feature = "webgpu")]
use crate::dom::webgpu::identityhub::IdentityHub;
use crate::dom::windowproxy::{WindowProxy, WindowProxyHandler};
use crate::dom::worklet::Worklet;
use crate::dom::workletglobalscope::WorkletGlobalScopeType;
use crate::layout_image::fetch_image_for_layout;
use crate::messaging::{MainThreadScriptMsg, ScriptEventLoopReceiver, ScriptEventLoopSender};
use crate::microtask::MicrotaskQueue;
use crate::realms::{enter_realm, InRealm};
use crate::script_runtime::{CanGc, JSContext, Runtime};
use crate::script_thread::ScriptThread;
use crate::timers::{IsInterval, TimerCallback};
use crate::unminify::unminified_path;
use crate::webdriver_handlers::jsval_to_webdriver;
use crate::{fetch, window_named_properties};
/// A callback to call when a response comes back from the `ImageCache`.
///
/// This is wrapped in a struct so that we can implement `MallocSizeOf`
/// for this type.
#[derive(MallocSizeOf)]
pub struct PendingImageCallback(
#[ignore_malloc_size_of = "dyn Fn is currently impossible to measure"]
Box<dyn Fn(PendingImageResponse) + 'static>,
);
/// Current state of the window object
#[derive(Clone, Copy, Debug, JSTraceable, MallocSizeOf, PartialEq)]
enum WindowState {
Alive,
Zombie, // Pipeline is closed, but the window hasn't been GCed yet.
}
/// How long we should wait before performing the initial reflow after `<body>` is parsed,
/// assuming that `<body>` take this long to parse.
const INITIAL_REFLOW_DELAY: Duration = Duration::from_millis(200);
/// During loading and parsing, layouts are suppressed to avoid flashing incomplete page
/// contents.
///
/// Exceptions:
/// - Parsing the body takes so long, that layouts are no longer suppressed in order
/// to show the user that the page is loading.
/// - Script triggers a layout query or scroll event in which case, we want to layout
/// but not display the contents.
///
/// For more information see: <https://github.com/servo/servo/pull/6028>.
#[derive(Clone, Copy, MallocSizeOf)]
enum LayoutBlocker {
/// The first load event hasn't been fired and we have not started to parse the `<body>` yet.
WaitingForParse,
/// The body is being parsed the `<body>` starting at the `Instant` specified.
Parsing(Instant),
/// The body finished parsing and the `load` event has been fired or parsing took so
/// long, that we are going to do layout anyway. Note that subsequent changes to the body
/// can trigger parsing again, but the `Window` stays in this state.
FiredLoadEventOrParsingTimerExpired,
}
impl LayoutBlocker {
fn layout_blocked(&self) -> bool {
!matches!(self, Self::FiredLoadEventOrParsingTimerExpired)
}
}
#[dom_struct]
pub(crate) struct Window {
globalscope: GlobalScope,
/// The webview that contains this [`Window`].
///
/// This may not be the top-level [`Window`], in the case of frames.
#[no_trace]
webview_id: WebViewId,
script_chan: Sender<MainThreadScriptMsg>,
#[no_trace]
#[ignore_malloc_size_of = "TODO: Add MallocSizeOf support to layout"]
layout: RefCell<Box<dyn Layout>>,
/// A [`FontContext`] which is used to store and match against fonts for this `Window` and to
/// trigger the download of web fonts.
#[no_trace]
#[conditional_malloc_size_of]
font_context: Arc<FontContext>,
navigator: MutNullableDom<Navigator>,
#[ignore_malloc_size_of = "Arc"]
#[no_trace]
image_cache: Arc<dyn ImageCache>,
#[no_trace]
image_cache_sender: IpcSender<PendingImageResponse>,
window_proxy: MutNullableDom<WindowProxy>,
document: MutNullableDom<Document>,
location: MutNullableDom<Location>,
history: MutNullableDom<History>,
custom_element_registry: MutNullableDom<CustomElementRegistry>,
performance: MutNullableDom<Performance>,
#[no_trace]
navigation_start: Cell<CrossProcessInstant>,
screen: MutNullableDom<Screen>,
session_storage: MutNullableDom<Storage>,
local_storage: MutNullableDom<Storage>,
status: DomRefCell<DOMString>,
/// For sending timeline markers. Will be ignored if
/// no devtools server
#[no_trace]
devtools_markers: DomRefCell<HashSet<TimelineMarkerType>>,
#[no_trace]
devtools_marker_sender: DomRefCell<Option<IpcSender<Option<TimelineMarker>>>>,
/// Most recent unhandled resize event, if any.
#[no_trace]
unhandled_resize_event: DomRefCell<Option<(WindowSizeData, WindowSizeType)>>,
/// Platform theme.
#[no_trace]
theme: Cell<PrefersColorScheme>,
/// Parent id associated with this page, if any.
#[no_trace]
parent_info: Option<PipelineId>,
/// Global static data related to the DOM.
dom_static: GlobalStaticData,
/// The JavaScript runtime.
#[ignore_malloc_size_of = "Rc<T> is hard"]
js_runtime: DomRefCell<Option<Rc<Runtime>>>,
/// The current size of the window, in pixels.
#[no_trace]
window_size: Cell<WindowSizeData>,
/// A handle for communicating messages to the bluetooth thread.
#[no_trace]
#[cfg(feature = "bluetooth")]
bluetooth_thread: IpcSender<BluetoothRequest>,
#[cfg(feature = "bluetooth")]
bluetooth_extra_permission_data: BluetoothExtraPermissionData,
/// An enlarged rectangle around the page contents visible in the viewport, used
/// to prevent creating display list items for content that is far away from the viewport.
#[no_trace]
page_clip_rect: Cell<UntypedRect<Au>>,
/// See the documentation for [`LayoutBlocker`]. Essentially, this flag prevents
/// layouts from happening before the first load event, apart from a few exceptional
/// cases.
#[no_trace]
layout_blocker: Cell<LayoutBlocker>,
/// A channel for communicating results of async scripts back to the webdriver server
#[no_trace]
webdriver_script_chan: DomRefCell<Option<IpcSender<WebDriverJSResult>>>,
/// The current state of the window object
current_state: Cell<WindowState>,
#[no_trace]
current_viewport: Cell<UntypedRect<Au>>,
error_reporter: CSSErrorReporter,
/// A list of scroll offsets for each scrollable element.
#[no_trace]
scroll_offsets: DomRefCell<HashMap<OpaqueNode, Vector2D<f32, LayoutPixel>>>,
/// All the MediaQueryLists we need to update
media_query_lists: DOMTracker<MediaQueryList>,
#[cfg(feature = "bluetooth")]
test_runner: MutNullableDom<TestRunner>,
/// A handle for communicating messages to the WebGL thread, if available.
#[ignore_malloc_size_of = "channels are hard"]
#[no_trace]
webgl_chan: Option<WebGLChan>,
#[ignore_malloc_size_of = "defined in webxr"]
#[no_trace]
#[cfg(feature = "webxr")]
webxr_registry: Option<webxr_api::Registry>,
/// When an element triggers an image load or starts watching an image load from the
/// `ImageCache` it adds an entry to this list. When those loads are triggered from
/// layout, they also add an etry to [`Self::pending_layout_images`].
#[no_trace]
pending_image_callbacks: DomRefCell<HashMap<PendingImageId, Vec<PendingImageCallback>>>,
/// All of the elements that have an outstanding image request that was
/// initiated by layout during a reflow. They are stored in the script thread
/// to ensure that the element can be marked dirty when the image data becomes
/// available at some point in the future.
pending_layout_images: DomRefCell<HashMapTracedValues<PendingImageId, Vec<Dom<Node>>>>,
/// Directory to store unminified css for this window if unminify-css
/// opt is enabled.
unminified_css_dir: DomRefCell<Option<String>>,
/// Directory with stored unminified scripts
local_script_source: Option<String>,
/// Worklets
test_worklet: MutNullableDom<Worklet>,
/// <https://drafts.css-houdini.org/css-paint-api-1/#paint-worklet>
paint_worklet: MutNullableDom<Worklet>,
/// The Webrender Document id associated with this window.
#[ignore_malloc_size_of = "defined in webrender_api"]
#[no_trace]
webrender_document: DocumentId,
/// Flag to identify whether mutation observers are present(true)/absent(false)
exists_mut_observer: Cell<bool>,
/// Cross-process access to the compositor.
#[ignore_malloc_size_of = "Wraps an IpcSender"]
#[no_trace]
compositor_api: CrossProcessCompositorApi,
/// Indicate whether a SetDocumentStatus message has been sent after a reflow is complete.
/// It is used to avoid sending idle message more than once, which is unneccessary.
has_sent_idle_message: Cell<bool>,
/// Emits notifications when there is a relayout.
relayout_event: bool,
/// Unminify Css.
unminify_css: bool,
/// Where to load userscripts from, if any. An empty string will load from
/// the resources/user-agent-js directory, and if the option isn't passed userscripts
/// won't be loaded.
userscripts_path: Option<String>,
/// Window's GL context from application
#[ignore_malloc_size_of = "defined in script_thread"]
#[no_trace]
player_context: WindowGLContext,
throttled: Cell<bool>,
/// A shared marker for the validity of any cached layout values. A value of true
/// indicates that any such values remain valid; any new layout that invalidates
/// those values will cause the marker to be set to false.
#[ignore_malloc_size_of = "Rc is hard"]
layout_marker: DomRefCell<Rc<Cell<bool>>>,
/// <https://dom.spec.whatwg.org/#window-current-event>
current_event: DomRefCell<Option<Dom<Event>>>,
}
impl Window {
pub(crate) fn webview_id(&self) -> WebViewId {
self.webview_id
}
pub(crate) fn as_global_scope(&self) -> &GlobalScope {
self.upcast::<GlobalScope>()
}
pub(crate) fn layout(&self) -> Ref<Box<dyn Layout>> {
self.layout.borrow()
}
pub(crate) fn layout_mut(&self) -> RefMut<Box<dyn Layout>> {
self.layout.borrow_mut()
}
pub(crate) fn get_exists_mut_observer(&self) -> bool {
self.exists_mut_observer.get()
}
pub(crate) fn set_exists_mut_observer(&self) {
self.exists_mut_observer.set(true);
}
#[allow(unsafe_code)]
pub(crate) fn clear_js_runtime_for_script_deallocation(&self) {
self.as_global_scope()
.remove_web_messaging_and_dedicated_workers_infra();
unsafe {
*self.js_runtime.borrow_for_script_deallocation() = None;
self.window_proxy.set(None);
self.current_state.set(WindowState::Zombie);
self.as_global_scope()
.task_manager()
.cancel_all_tasks_and_ignore_future_tasks();
}
}
/// A convenience method for
/// <https://html.spec.whatwg.org/multipage/#a-browsing-context-is-discarded>
pub(crate) fn discard_browsing_context(&self) {
let proxy = match self.window_proxy.get() {
Some(proxy) => proxy,
None => panic!("Discarding a BC from a window that has none"),
};
proxy.discard_browsing_context();
// Step 4 of https://html.spec.whatwg.org/multipage/#discard-a-document
// Other steps performed when the `PipelineExit` message
// is handled by the ScriptThread.
self.as_global_scope()
.task_manager()
.cancel_all_tasks_and_ignore_future_tasks();
}
/// Get a sender to the time profiler thread.
pub(crate) fn time_profiler_chan(&self) -> &TimeProfilerChan {
self.globalscope.time_profiler_chan()
}
pub(crate) fn origin(&self) -> &MutableOrigin {
self.globalscope.origin()
}
#[allow(unsafe_code)]
pub(crate) fn get_cx(&self) -> JSContext {
unsafe { JSContext::from_ptr(self.js_runtime.borrow().as_ref().unwrap().cx()) }
}
pub(crate) fn get_js_runtime(&self) -> Ref<Option<Rc<Runtime>>> {
self.js_runtime.borrow()
}
pub(crate) fn main_thread_script_chan(&self) -> &Sender<MainThreadScriptMsg> {
&self.script_chan
}
pub(crate) fn parent_info(&self) -> Option<PipelineId> {
self.parent_info
}
pub(crate) fn new_script_pair(&self) -> (ScriptEventLoopSender, ScriptEventLoopReceiver) {
let (sender, receiver) = unbounded();
(
ScriptEventLoopSender::MainThread(sender),
ScriptEventLoopReceiver::MainThread(receiver),
)
}
pub(crate) fn event_loop_sender(&self) -> ScriptEventLoopSender {
ScriptEventLoopSender::MainThread(self.script_chan.clone())
}
pub(crate) fn image_cache(&self) -> Arc<dyn ImageCache> {
self.image_cache.clone()
}
/// This can panic if it is called after the browsing context has been discarded
pub(crate) fn window_proxy(&self) -> DomRoot<WindowProxy> {
self.window_proxy.get().unwrap()
}
/// Returns the window proxy if it has not been discarded.
/// <https://html.spec.whatwg.org/multipage/#a-browsing-context-is-discarded>
pub(crate) fn undiscarded_window_proxy(&self) -> Option<DomRoot<WindowProxy>> {
self.window_proxy.get().and_then(|window_proxy| {
if window_proxy.is_browsing_context_discarded() {
None
} else {
Some(window_proxy)
}
})
}
#[cfg(feature = "bluetooth")]
pub(crate) fn bluetooth_thread(&self) -> IpcSender<BluetoothRequest> {
self.bluetooth_thread.clone()
}
#[cfg(feature = "bluetooth")]
pub(crate) fn bluetooth_extra_permission_data(&self) -> &BluetoothExtraPermissionData {
&self.bluetooth_extra_permission_data
}
pub(crate) fn css_error_reporter(&self) -> Option<&dyn ParseErrorReporter> {
Some(&self.error_reporter)
}
/// Sets a new list of scroll offsets.
///
/// This is called when layout gives us new ones and WebRender is in use.
pub(crate) fn set_scroll_offsets(
&self,
offsets: HashMap<OpaqueNode, Vector2D<f32, LayoutPixel>>,
) {
*self.scroll_offsets.borrow_mut() = offsets
}
pub(crate) fn current_viewport(&self) -> UntypedRect<Au> {
self.current_viewport.clone().get()
}
pub(crate) fn webgl_chan(&self) -> Option<WebGLCommandSender> {
self.webgl_chan
.as_ref()
.map(|chan| WebGLCommandSender::new(chan.clone()))
}
#[cfg(feature = "webxr")]
pub(crate) fn webxr_registry(&self) -> Option<webxr_api::Registry> {
self.webxr_registry.clone()
}
fn new_paint_worklet(&self) -> DomRoot<Worklet> {
debug!("Creating new paint worklet.");
Worklet::new(self, WorkletGlobalScopeType::Paint, CanGc::note())
}
pub(crate) fn register_image_cache_listener(
&self,
id: PendingImageId,
callback: impl Fn(PendingImageResponse) + 'static,
) -> IpcSender<PendingImageResponse> {
self.pending_image_callbacks
.borrow_mut()
.entry(id)
.or_default()
.push(PendingImageCallback(Box::new(callback)));
self.image_cache_sender.clone()
}
fn pending_layout_image_notification(&self, response: PendingImageResponse) {
let mut images = self.pending_layout_images.borrow_mut();
let nodes = images.entry(response.id);
let nodes = match nodes {
Entry::Occupied(nodes) => nodes,
Entry::Vacant(_) => return,
};
for node in nodes.get() {
node.dirty(NodeDamage::OtherNodeDamage);
}
match response.response {
ImageResponse::MetadataLoaded(_) => {},
ImageResponse::Loaded(_, _) |
ImageResponse::PlaceholderLoaded(_, _) |
ImageResponse::None => {
nodes.remove();
},
}
}
pub(crate) fn pending_image_notification(&self, response: PendingImageResponse) {
// We take the images here, in order to prevent maintaining a mutable borrow when
// image callbacks are called. These, in turn, can trigger garbage collection.
// Normally this shouldn't trigger more pending image notifications, but just in
// case we do not want to cause a double borrow here.
let mut images = std::mem::take(&mut *self.pending_image_callbacks.borrow_mut());
let Entry::Occupied(callbacks) = images.entry(response.id) else {
let _ = std::mem::replace(&mut *self.pending_image_callbacks.borrow_mut(), images);
return;
};
for callback in callbacks.get() {
callback.0(response.clone());
}
match response.response {
ImageResponse::MetadataLoaded(_) => {},
ImageResponse::Loaded(_, _) |
ImageResponse::PlaceholderLoaded(_, _) |
ImageResponse::None => {
callbacks.remove();
},
}
let _ = std::mem::replace(&mut *self.pending_image_callbacks.borrow_mut(), images);
}
pub(crate) fn compositor_api(&self) -> &CrossProcessCompositorApi {
&self.compositor_api
}
pub(crate) fn get_userscripts_path(&self) -> Option<String> {
self.userscripts_path.clone()
}
pub(crate) fn get_player_context(&self) -> WindowGLContext {
self.player_context.clone()
}
// see note at https://dom.spec.whatwg.org/#concept-event-dispatch step 2
pub(crate) fn dispatch_event_with_target_override(
&self,
event: &Event,
can_gc: CanGc,
) -> EventStatus {
event.dispatch(self.upcast(), true, can_gc)
}
pub(crate) fn font_context(&self) -> &Arc<FontContext> {
&self.font_context
}
}
// https://html.spec.whatwg.org/multipage/#atob
pub(crate) fn base64_btoa(input: DOMString) -> Fallible<DOMString> {
// "The btoa() method must throw an InvalidCharacterError exception if
// the method's first argument contains any character whose code point
// is greater than U+00FF."
if input.chars().any(|c: char| c > '\u{FF}') {
Err(Error::InvalidCharacter)
} else {
// "Otherwise, the user agent must convert that argument to a
// sequence of octets whose nth octet is the eight-bit
// representation of the code point of the nth character of
// the argument,"
let octets = input.chars().map(|c: char| c as u8).collect::<Vec<u8>>();
// "and then must apply the base64 algorithm to that sequence of
// octets, and return the result. [RFC4648]"
let config =
base64::engine::general_purpose::GeneralPurposeConfig::new().with_encode_padding(true);
let engine = base64::engine::GeneralPurpose::new(&base64::alphabet::STANDARD, config);
Ok(DOMString::from(engine.encode(octets)))
}
}
// https://html.spec.whatwg.org/multipage/#atob
pub(crate) fn base64_atob(input: DOMString) -> Fallible<DOMString> {
// "Remove all space characters from input."
fn is_html_space(c: char) -> bool {
HTML_SPACE_CHARACTERS.iter().any(|&m| m == c)
}
let without_spaces = input
.chars()
.filter(|&c| !is_html_space(c))
.collect::<String>();
let mut input = &*without_spaces;
// "If the length of input divides by 4 leaving no remainder, then:
// if input ends with one or two U+003D EQUALS SIGN (=) characters,
// remove them from input."
if input.len() % 4 == 0 {
if input.ends_with("==") {
input = &input[..input.len() - 2]
} else if input.ends_with('=') {
input = &input[..input.len() - 1]
}
}
// "If the length of input divides by 4 leaving a remainder of 1,
// throw an InvalidCharacterError exception and abort these steps."
if input.len() % 4 == 1 {
return Err(Error::InvalidCharacter);
}
// "If input contains a character that is not in the following list of
// characters and character ranges, throw an InvalidCharacterError
// exception and abort these steps:
//
// U+002B PLUS SIGN (+)
// U+002F SOLIDUS (/)
// Alphanumeric ASCII characters"
if input
.chars()
.any(|c| c != '+' && c != '/' && !c.is_alphanumeric())
{
return Err(Error::InvalidCharacter);
}
let config = base64::engine::general_purpose::GeneralPurposeConfig::new()
.with_decode_padding_mode(base64::engine::DecodePaddingMode::RequireNone)
.with_decode_allow_trailing_bits(true);
let engine = base64::engine::GeneralPurpose::new(&base64::alphabet::STANDARD, config);
let data = engine.decode(input).map_err(|_| Error::InvalidCharacter)?;
Ok(data.iter().map(|&b| b as char).collect::<String>().into())
}
impl WindowMethods<crate::DomTypeHolder> for Window {
// https://html.spec.whatwg.org/multipage/#dom-alert
fn Alert_(&self) {
self.Alert(DOMString::new());
}
// https://html.spec.whatwg.org/multipage/#dom-alert
fn Alert(&self, s: DOMString) {
// Print to the console.
// Ensure that stderr doesn't trample through the alert() we use to
// communicate test results (see executorservo.py in wptrunner).
{
let stderr = stderr();
let mut stderr = stderr.lock();
let stdout = stdout();
let mut stdout = stdout.lock();
writeln!(&mut stdout, "\nALERT: {}", s).unwrap();
stdout.flush().unwrap();
stderr.flush().unwrap();
}
let (sender, receiver) =
ProfiledIpc::channel(self.global().time_profiler_chan().clone()).unwrap();
let prompt = PromptDefinition::Alert(s.to_string(), sender);
let msg = EmbedderMsg::Prompt(self.webview_id(), prompt, PromptOrigin::Untrusted);
self.send_to_embedder(msg);
receiver.recv().unwrap();
}
// https://html.spec.whatwg.org/multipage/#dom-confirm
fn Confirm(&self, s: DOMString) -> bool {
let (sender, receiver) =
ProfiledIpc::channel(self.global().time_profiler_chan().clone()).unwrap();
let prompt = PromptDefinition::OkCancel(s.to_string(), sender);
let msg = EmbedderMsg::Prompt(self.webview_id(), prompt, PromptOrigin::Untrusted);
self.send_to_embedder(msg);
receiver.recv().unwrap() == PromptResult::Primary
}
// https://html.spec.whatwg.org/multipage/#dom-prompt
fn Prompt(&self, message: DOMString, default: DOMString) -> Option<DOMString> {
let (sender, receiver) =
ProfiledIpc::channel(self.global().time_profiler_chan().clone()).unwrap();
let prompt = PromptDefinition::Input(message.to_string(), default.to_string(), sender);
let msg = EmbedderMsg::Prompt(self.webview_id(), prompt, PromptOrigin::Untrusted);
self.send_to_embedder(msg);
receiver.recv().unwrap().map(|s| s.into())
}
// https://html.spec.whatwg.org/multipage/#dom-window-stop
fn Stop(&self, can_gc: CanGc) {
// TODO: Cancel ongoing navigation.
let doc = self.Document();
doc.abort(can_gc);
}
// https://html.spec.whatwg.org/multipage/#dom-open
fn Open(
&self,
url: USVString,
target: DOMString,
features: DOMString,
can_gc: CanGc,
) -> Fallible<Option<DomRoot<WindowProxy>>> {
self.window_proxy().open(url, target, features, can_gc)
}
// https://html.spec.whatwg.org/multipage/#dom-opener
fn GetOpener(
&self,
cx: JSContext,
in_realm_proof: InRealm,
mut retval: MutableHandleValue,
) -> Fallible<()> {
// Step 1, Let current be this Window object's browsing context.
let current = match self.window_proxy.get() {
Some(proxy) => proxy,
// Step 2, If current is null, then return null.
None => {
retval.set(NullValue());
return Ok(());
},
};
// Still step 2, since the window's BC is the associated doc's BC,
// see https://html.spec.whatwg.org/multipage/#window-bc
// and a doc's BC is null if it has been discarded.
// see https://html.spec.whatwg.org/multipage/#concept-document-bc
if current.is_browsing_context_discarded() {
retval.set(NullValue());
return Ok(());
}
// Step 3 to 5.
current.opener(*cx, in_realm_proof, retval);
Ok(())
}
#[allow(unsafe_code)]
// https://html.spec.whatwg.org/multipage/#dom-opener
fn SetOpener(&self, cx: JSContext, value: HandleValue) -> ErrorResult {
// Step 1.
if value.is_null() {
if let Some(proxy) = self.window_proxy.get() {
proxy.disown();
}
return Ok(());
}
// Step 2.
let obj = self.reflector().get_jsobject();
unsafe {
let result =
JS_DefineProperty(*cx, obj, c"opener".as_ptr(), value, JSPROP_ENUMERATE as u32);
if result {
Ok(())
} else {
Err(Error::JSFailed)
}
}
}
// https://html.spec.whatwg.org/multipage/#dom-window-closed
fn Closed(&self) -> bool {
self.window_proxy
.get()
.map(|ref proxy| proxy.is_browsing_context_discarded() || proxy.is_closing())
.unwrap_or(true)
}
// https://html.spec.whatwg.org/multipage/#dom-window-close
fn Close(&self) {
// Step 1, Let current be this Window object's browsing context.
// Step 2, If current is null or its is closing is true, then return.
let window_proxy = match self.window_proxy.get() {
Some(proxy) => proxy,
None => return,
};
if window_proxy.is_closing() {
return;
}
// Note: check the length of the "session history", as opposed to the joint session history?
// see https://github.com/whatwg/html/issues/3734
if let Ok(history_length) = self.History().GetLength() {
let is_auxiliary = window_proxy.is_auxiliary();
// https://html.spec.whatwg.org/multipage/#script-closable
let is_script_closable = (self.is_top_level() && history_length == 1) ||
is_auxiliary ||
pref!(dom_allow_scripts_to_close_windows);
// TODO: rest of Step 3:
// Is the incumbent settings object's responsible browsing context familiar with current?
// Is the incumbent settings object's responsible browsing context allowed to navigate current?
if is_script_closable {
// Step 3.1, set current's is closing to true.
window_proxy.close();
// Step 3.2, queue a task on the DOM manipulation task source to close current.
let this = Trusted::new(self);
let task = task!(window_close_browsing_context: move || {
let window = this.root();
let document = window.Document();
// https://html.spec.whatwg.org/multipage/#closing-browsing-contexts
// Step 1, check if traversable is closing, was already done above.
// Steps 2 and 3, prompt to unload for all inclusive descendant navigables.
// TODO: We should be prompting for all inclusive descendant navigables,
// but we pass false here, which suggests we are not doing that. Why?
if document.prompt_to_unload(false, CanGc::note()) {
// Step 4, unload.
document.unload(false, CanGc::note());
// https://html.spec.whatwg.org/multipage/#a-browsing-context-is-discarded
// which calls into https://html.spec.whatwg.org/multipage/#discard-a-document.
window.discard_browsing_context();
window.send_to_constellation(ScriptMsg::DiscardTopLevelBrowsingContext);
}
});
self.as_global_scope()
.task_manager()
.dom_manipulation_task_source()
.queue(task);
}
}
}
// https://html.spec.whatwg.org/multipage/#dom-document-2
fn Document(&self) -> DomRoot<Document> {
self.document
.get()
.expect("Document accessed before initialization.")
}
// https://html.spec.whatwg.org/multipage/#dom-history
fn History(&self) -> DomRoot<History> {
self.history.or_init(|| History::new(self, CanGc::note()))
}
// https://html.spec.whatwg.org/multipage/#dom-window-customelements
fn CustomElements(&self) -> DomRoot<CustomElementRegistry> {
self.custom_element_registry
.or_init(|| CustomElementRegistry::new(self, CanGc::note()))
}
// https://html.spec.whatwg.org/multipage/#dom-location
fn Location(&self) -> DomRoot<Location> {
self.location.or_init(|| Location::new(self, CanGc::note()))
}
// https://html.spec.whatwg.org/multipage/#dom-sessionstorage
fn SessionStorage(&self) -> DomRoot<Storage> {
self.session_storage
.or_init(|| Storage::new(self, StorageType::Session, CanGc::note()))
}
// https://html.spec.whatwg.org/multipage/#dom-localstorage
fn LocalStorage(&self) -> DomRoot<Storage> {
self.local_storage
.or_init(|| Storage::new(self, StorageType::Local, CanGc::note()))
}
// https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#dfn-GlobalCrypto
fn Crypto(&self) -> DomRoot<Crypto> {
self.as_global_scope().crypto()
}
// https://html.spec.whatwg.org/multipage/#dom-frameelement
fn GetFrameElement(&self) -> Option<DomRoot<Element>> {
// Steps 1-3.
let window_proxy = self.window_proxy.get()?;
// Step 4-5.
let container = window_proxy.frame_element()?;
// Step 6.
let container_doc = container.owner_document();
let current_doc = GlobalScope::current()
.expect("No current global object")
.as_window()
.Document();
if !current_doc
.origin()
.same_origin_domain(container_doc.origin())
{
return None;
}
// Step 7.
Some(DomRoot::from_ref(container))
}
// https://html.spec.whatwg.org/multipage/#dom-navigator
fn Navigator(&self) -> DomRoot<Navigator> {
self.navigator
.or_init(|| Navigator::new(self, CanGc::note()))
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-settimeout
fn SetTimeout(
&self,
_cx: JSContext,
callback: StringOrFunction,
timeout: i32,
args: Vec<HandleValue>,
) -> i32 {
let callback = match callback {
StringOrFunction::String(i) => TimerCallback::StringTimerCallback(i),
StringOrFunction::Function(i) => TimerCallback::FunctionTimerCallback(i),
};
self.as_global_scope().set_timeout_or_interval(
callback,
args,
Duration::from_millis(timeout.max(0) as u64),
IsInterval::NonInterval,
)
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-cleartimeout
fn ClearTimeout(&self, handle: i32) {
self.as_global_scope().clear_timeout_or_interval(handle);
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-setinterval
fn SetInterval(
&self,
_cx: JSContext,
callback: StringOrFunction,
timeout: i32,
args: Vec<HandleValue>,
) -> i32 {
let callback = match callback {
StringOrFunction::String(i) => TimerCallback::StringTimerCallback(i),
StringOrFunction::Function(i) => TimerCallback::FunctionTimerCallback(i),
};
self.as_global_scope().set_timeout_or_interval(
callback,
args,
Duration::from_millis(timeout.max(0) as u64),
IsInterval::Interval,
)
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-clearinterval
fn ClearInterval(&self, handle: i32) {
self.ClearTimeout(handle);
}
// https://html.spec.whatwg.org/multipage/#dom-queuemicrotask
fn QueueMicrotask(&self, callback: Rc<VoidFunction>) {
self.as_global_scope().queue_function_as_microtask(callback);
}
// https://html.spec.whatwg.org/multipage/#dom-createimagebitmap
fn CreateImageBitmap(
&self,
image: ImageBitmapSource,
options: &ImageBitmapOptions,
can_gc: CanGc,
) -> Rc<Promise> {
let p = self
.as_global_scope()
.create_image_bitmap(image, options, can_gc);
p
}
// https://html.spec.whatwg.org/multipage/#dom-window
fn Window(&self) -> DomRoot<WindowProxy> {
self.window_proxy()
}
// https://html.spec.whatwg.org/multipage/#dom-self
fn Self_(&self) -> DomRoot<WindowProxy> {
self.window_proxy()
}
// https://html.spec.whatwg.org/multipage/#dom-frames
fn Frames(&self) -> DomRoot<WindowProxy> {
self.window_proxy()
}
// https://html.spec.whatwg.org/multipage/#accessing-other-browsing-contexts
fn Length(&self) -> u32 {
self.Document().iframes().iter().count() as u32
}
// https://html.spec.whatwg.org/multipage/#dom-parent
fn GetParent(&self) -> Option<DomRoot<WindowProxy>> {
// Steps 1-3.
let window_proxy = self.undiscarded_window_proxy()?;
// Step 4.
if let Some(parent) = window_proxy.parent() {
return Some(DomRoot::from_ref(parent));
}
// Step 5.
Some(window_proxy)
}
// https://html.spec.whatwg.org/multipage/#dom-top
fn GetTop(&self) -> Option<DomRoot<WindowProxy>> {
// Steps 1-3.
let window_proxy = self.undiscarded_window_proxy()?;
// Steps 4-5.
Some(DomRoot::from_ref(window_proxy.top()))
}
// https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/
// NavigationTiming/Overview.html#sec-window.performance-attribute
fn Performance(&self) -> DomRoot<Performance> {
self.performance.or_init(|| {
Performance::new(
self.as_global_scope(),
self.navigation_start.get(),
CanGc::note(),
)
})
}
// https://html.spec.whatwg.org/multipage/#globaleventhandlers
global_event_handlers!();
// https://html.spec.whatwg.org/multipage/#windoweventhandlers
window_event_handlers!();
// https://developer.mozilla.org/en-US/docs/Web/API/Window/screen
fn Screen(&self) -> DomRoot<Screen> {
self.screen.or_init(|| Screen::new(self, CanGc::note()))
}
// https://html.spec.whatwg.org/multipage/#dom-windowbase64-btoa
fn Btoa(&self, btoa: DOMString) -> Fallible<DOMString> {
base64_btoa(btoa)
}
// https://html.spec.whatwg.org/multipage/#dom-windowbase64-atob
fn Atob(&self, atob: DOMString) -> Fallible<DOMString> {
base64_atob(atob)
}
/// <https://html.spec.whatwg.org/multipage/#dom-window-requestanimationframe>
fn RequestAnimationFrame(&self, callback: Rc<FrameRequestCallback>) -> u32 {
self.Document()
.request_animation_frame(AnimationFrameCallback::FrameRequestCallback { callback })
}
/// <https://html.spec.whatwg.org/multipage/#dom-window-cancelanimationframe>
fn CancelAnimationFrame(&self, ident: u32) {
let doc = self.Document();
doc.cancel_animation_frame(ident);
}
// https://html.spec.whatwg.org/multipage/#dom-window-postmessage
fn PostMessage(
&self,
cx: JSContext,
message: HandleValue,
target_origin: USVString,
transfer: CustomAutoRooterGuard<Vec<*mut JSObject>>,
) -> ErrorResult {
let incumbent = GlobalScope::incumbent().expect("no incumbent global?");
let source = incumbent.as_window();
let source_origin = source.Document().origin().immutable().clone();
self.post_message_impl(&target_origin, source_origin, source, cx, message, transfer)
}
/// <https://html.spec.whatwg.org/multipage/#dom-messageport-postmessage>
fn PostMessage_(
&self,
cx: JSContext,
message: HandleValue,
options: RootedTraceableBox<WindowPostMessageOptions>,
) -> ErrorResult {
let mut rooted = CustomAutoRooter::new(
options
.parent
.transfer
.iter()
.map(|js: &RootedTraceableBox<Heap<*mut JSObject>>| js.get())
.collect(),
);
let transfer = CustomAutoRooterGuard::new(*cx, &mut rooted);
let incumbent = GlobalScope::incumbent().expect("no incumbent global?");
let source = incumbent.as_window();
let source_origin = source.Document().origin().immutable().clone();
self.post_message_impl(
&options.targetOrigin,
source_origin,
source,
cx,
message,
transfer,
)
}
// https://html.spec.whatwg.org/multipage/#dom-window-captureevents
fn CaptureEvents(&self) {
// This method intentionally does nothing
}
// https://html.spec.whatwg.org/multipage/#dom-window-releaseevents
fn ReleaseEvents(&self) {
// This method intentionally does nothing
}
// check-tidy: no specs after this line
fn Debug(&self, message: DOMString) {
debug!("{}", message);
}
#[allow(unsafe_code)]
fn Gc(&self) {
unsafe {
JS_GC(*self.get_cx(), GCReason::API);
}
}
#[allow(unsafe_code)]
fn Js_backtrace(&self) {
unsafe {
println!("Current JS stack:");
dump_js_stack(*self.get_cx());
let rust_stack = Backtrace::new();
println!("Current Rust stack:\n{:?}", rust_stack);
}
}
#[allow(unsafe_code)]
fn WebdriverCallback(&self, cx: JSContext, val: HandleValue) {
let rv = unsafe { jsval_to_webdriver(*cx, &self.globalscope, val) };
let opt_chan = self.webdriver_script_chan.borrow_mut().take();
if let Some(chan) = opt_chan {
chan.send(rv).unwrap();
}
}
fn WebdriverTimeout(&self) {
let opt_chan = self.webdriver_script_chan.borrow_mut().take();
if let Some(chan) = opt_chan {
chan.send(Err(WebDriverJSError::Timeout)).unwrap();
}
}
// https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle
fn GetComputedStyle(
&self,
element: &Element,
pseudo: Option<DOMString>,
) -> DomRoot<CSSStyleDeclaration> {
// Steps 1-4.
let pseudo = pseudo.map(|mut s| {
s.make_ascii_lowercase();
s
});
let pseudo = match pseudo {
Some(ref pseudo) if pseudo == ":before" || pseudo == "::before" => {
Some(PseudoElement::Before)
},
Some(ref pseudo) if pseudo == ":after" || pseudo == "::after" => {
Some(PseudoElement::After)
},
_ => None,
};
// Step 5.
CSSStyleDeclaration::new(
self,
CSSStyleOwner::Element(Dom::from_ref(element)),
pseudo,
CSSModificationAccess::Readonly,
CanGc::note(),
)
}
// https://drafts.csswg.org/cssom-view/#dom-window-innerheight
//TODO Include Scrollbar
fn InnerHeight(&self) -> i32 {
self.window_size
.get()
.initial_viewport
.height
.to_i32()
.unwrap_or(0)
}
// https://drafts.csswg.org/cssom-view/#dom-window-innerwidth
//TODO Include Scrollbar
fn InnerWidth(&self) -> i32 {
self.window_size
.get()
.initial_viewport
.width
.to_i32()
.unwrap_or(0)
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollx
fn ScrollX(&self) -> i32 {
self.current_viewport.get().origin.x.to_px()
}
// https://drafts.csswg.org/cssom-view/#dom-window-pagexoffset
fn PageXOffset(&self) -> i32 {
self.ScrollX()
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrolly
fn ScrollY(&self) -> i32 {
self.current_viewport.get().origin.y.to_px()
}
// https://drafts.csswg.org/cssom-view/#dom-window-pageyoffset
fn PageYOffset(&self) -> i32 {
self.ScrollY()
}
// https://drafts.csswg.org/cssom-view/#dom-window-scroll
fn Scroll(&self, options: &ScrollToOptions, can_gc: CanGc) {
// Step 1
let left = options.left.unwrap_or(0.0f64);
let top = options.top.unwrap_or(0.0f64);
self.scroll(left, top, options.parent.behavior, can_gc);
}
// https://drafts.csswg.org/cssom-view/#dom-window-scroll
fn Scroll_(&self, x: f64, y: f64, can_gc: CanGc) {
self.scroll(x, y, ScrollBehavior::Auto, can_gc);
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollto
fn ScrollTo(&self, options: &ScrollToOptions) {
self.Scroll(options, CanGc::note());
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollto
fn ScrollTo_(&self, x: f64, y: f64) {
self.scroll(x, y, ScrollBehavior::Auto, CanGc::note());
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollby
fn ScrollBy(&self, options: &ScrollToOptions, can_gc: CanGc) {
// Step 1
let x = options.left.unwrap_or(0.0f64);
let y = options.top.unwrap_or(0.0f64);
self.ScrollBy_(x, y, can_gc);
self.scroll(x, y, options.parent.behavior, can_gc);
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollby
fn ScrollBy_(&self, x: f64, y: f64, can_gc: CanGc) {
// Step 3
let left = x + self.ScrollX() as f64;
// Step 4
let top = y + self.ScrollY() as f64;
// Step 5
self.scroll(left, top, ScrollBehavior::Auto, can_gc);
}
// https://drafts.csswg.org/cssom-view/#dom-window-resizeto
fn ResizeTo(&self, width: i32, height: i32) {
// Step 1
//TODO determine if this operation is allowed
let dpr = self.device_pixel_ratio();
let size = Size2D::new(width, height).to_f32() * dpr;
self.send_to_embedder(EmbedderMsg::ResizeTo(self.webview_id(), size.to_i32()));
}
// https://drafts.csswg.org/cssom-view/#dom-window-resizeby
fn ResizeBy(&self, x: i32, y: i32) {
let (size, _) = self.client_window();
// Step 1
self.ResizeTo(
x + size.width.to_i32().unwrap_or(1),
y + size.height.to_i32().unwrap_or(1),
)
}
// https://drafts.csswg.org/cssom-view/#dom-window-moveto
fn MoveTo(&self, x: i32, y: i32) {
// Step 1
//TODO determine if this operation is allowed
let dpr = self.device_pixel_ratio();
let point = Point2D::new(x, y).to_f32() * dpr;
let msg = EmbedderMsg::MoveTo(self.webview_id(), point.to_i32());
self.send_to_embedder(msg);
}
// https://drafts.csswg.org/cssom-view/#dom-window-moveby
fn MoveBy(&self, x: i32, y: i32) {
let (_, origin) = self.client_window();
// Step 1
self.MoveTo(x + origin.x, y + origin.y)
}
// https://drafts.csswg.org/cssom-view/#dom-window-screenx
fn ScreenX(&self) -> i32 {
let (_, origin) = self.client_window();
origin.x
}
// https://drafts.csswg.org/cssom-view/#dom-window-screeny
fn ScreenY(&self) -> i32 {
let (_, origin) = self.client_window();
origin.y
}
// https://drafts.csswg.org/cssom-view/#dom-window-outerheight
fn OuterHeight(&self) -> i32 {
let (size, _) = self.client_window();
size.height.to_i32().unwrap_or(1)
}
// https://drafts.csswg.org/cssom-view/#dom-window-outerwidth
fn OuterWidth(&self) -> i32 {
let (size, _) = self.client_window();
size.width.to_i32().unwrap_or(1)
}
// https://drafts.csswg.org/cssom-view/#dom-window-devicepixelratio
fn DevicePixelRatio(&self) -> Finite<f64> {
Finite::wrap(self.device_pixel_ratio().get() as f64)
}
// https://html.spec.whatwg.org/multipage/#dom-window-status
fn Status(&self) -> DOMString {
self.status.borrow().clone()
}
// https://html.spec.whatwg.org/multipage/#dom-window-status
fn SetStatus(&self, status: DOMString) {
*self.status.borrow_mut() = status
}
// https://drafts.csswg.org/cssom-view/#dom-window-matchmedia
fn MatchMedia(&self, query: DOMString) -> DomRoot<MediaQueryList> {
let mut input = ParserInput::new(&query);
let mut parser = Parser::new(&mut input);
let url_data = UrlExtraData(self.get_url().get_arc());
let quirks_mode = self.Document().quirks_mode();
let context = CssParserContext::new(
Origin::Author,
&url_data,
Some(CssRuleType::Media),
ParsingMode::DEFAULT,
quirks_mode,
/* namespaces = */ Default::default(),
self.css_error_reporter(),
None,
);
let media_query_list = media_queries::MediaList::parse(&context, &mut parser);
let document = self.Document();
let mql = MediaQueryList::new(&document, media_query_list, CanGc::note());
self.media_query_lists.track(&*mql);
mql
}
// https://fetch.spec.whatwg.org/#fetch-method
fn Fetch(
&self,
input: RequestOrUSVString,
init: RootedTraceableBox<RequestInit>,
comp: InRealm,
can_gc: CanGc,
) -> Rc<Promise> {
fetch::Fetch(self.upcast(), input, init, comp, can_gc)
}
#[cfg(feature = "bluetooth")]
fn TestRunner(&self) -> DomRoot<TestRunner> {
self.test_runner
.or_init(|| TestRunner::new(self.upcast(), CanGc::note()))
}
fn RunningAnimationCount(&self) -> u32 {
self.document
.get()
.map_or(0, |d| d.animations().running_animation_count() as u32)
}
// https://html.spec.whatwg.org/multipage/#dom-name
fn SetName(&self, name: DOMString) {
if let Some(proxy) = self.undiscarded_window_proxy() {
proxy.set_name(name);
}
}
// https://html.spec.whatwg.org/multipage/#dom-name
fn Name(&self) -> DOMString {
match self.undiscarded_window_proxy() {
Some(proxy) => proxy.get_name(),
None => "".into(),
}
}
// https://html.spec.whatwg.org/multipage/#dom-origin
fn Origin(&self) -> USVString {
USVString(self.origin().immutable().ascii_serialization())
}
// https://w3c.github.io/selection-api/#dom-window-getselection
fn GetSelection(&self) -> Option<DomRoot<Selection>> {
self.document.get().and_then(|d| d.GetSelection())
}
// https://dom.spec.whatwg.org/#dom-window-event
#[allow(unsafe_code)]
fn Event(&self, cx: JSContext, rval: MutableHandleValue) {
if let Some(ref event) = *self.current_event.borrow() {
unsafe {
event.reflector().get_jsobject().to_jsval(*cx, rval);
}
}
}
fn IsSecureContext(&self) -> bool {
self.as_global_scope().is_secure_context()
}
/// <https://html.spec.whatwg.org/multipage/#dom-window-nameditem>
fn NamedGetter(&self, name: DOMString) -> Option<NamedPropertyValue> {
if name.is_empty() {
return None;
}
let document = self.Document();
// https://html.spec.whatwg.org/multipage/#document-tree-child-browsing-context-name-property-set
let iframes: Vec<_> = document
.iframes()
.iter()
.filter(|iframe| {
if let Some(window) = iframe.GetContentWindow() {
return window.get_name() == name;
}
false
})
.collect();
let iframe_iter = iframes.iter().map(|iframe| iframe.upcast::<Element>());
let name = Atom::from(&*name);
// Step 1.
let elements_with_name = document.get_elements_with_name(&name);
let name_iter = elements_with_name
.iter()
.map(|element| &**element)
.filter(|elem| is_named_element_with_name_attribute(elem));
let elements_with_id = document.get_elements_with_id(&name);
let id_iter = elements_with_id
.iter()
.map(|element| &**element)
.filter(|elem| is_named_element_with_id_attribute(elem));
// Step 2.
for elem in iframe_iter.clone() {
if let Some(nested_window_proxy) = elem
.downcast::<HTMLIFrameElement>()
.and_then(|iframe| iframe.GetContentWindow())
{
return Some(NamedPropertyValue::WindowProxy(nested_window_proxy));
}
}
let mut elements = iframe_iter.chain(name_iter).chain(id_iter);
let first = elements.next()?;
if elements.next().is_none() {
// Step 3.
return Some(NamedPropertyValue::Element(DomRoot::from_ref(first)));
}
// Step 4.
#[derive(JSTraceable, MallocSizeOf)]
struct WindowNamedGetter {
#[no_trace]
name: Atom,
}
impl CollectionFilter for WindowNamedGetter {
fn filter(&self, elem: &Element, _root: &Node) -> bool {
let type_ = match elem.upcast::<Node>().type_id() {
NodeTypeId::Element(ElementTypeId::HTMLElement(type_)) => type_,
_ => return false,
};
if elem.get_id().as_ref() == Some(&self.name) {
return true;
}
match type_ {
HTMLElementTypeId::HTMLEmbedElement |
HTMLElementTypeId::HTMLFormElement |
HTMLElementTypeId::HTMLImageElement |
HTMLElementTypeId::HTMLObjectElement => {
elem.get_name().as_ref() == Some(&self.name)
},
_ => false,
}
}
}
let collection = HTMLCollection::create(
self,
document.upcast(),
Box::new(WindowNamedGetter { name }),
);
Some(NamedPropertyValue::HTMLCollection(collection))
}
// https://html.spec.whatwg.org/multipage/#dom-tree-accessors:supported-property-names
fn SupportedPropertyNames(&self) -> Vec<DOMString> {
let mut names_with_first_named_element_map: HashMap<&Atom, &Element> = HashMap::new();
let document = self.Document();
let name_map = document.name_map();
for (name, elements) in &name_map.0 {
if name.is_empty() {
continue;
}
let mut name_iter = elements
.iter()
.filter(|elem| is_named_element_with_name_attribute(elem));
if let Some(first) = name_iter.next() {
names_with_first_named_element_map.insert(name, first);
}
}
let id_map = document.id_map();
for (id, elements) in &id_map.0 {
if id.is_empty() {
continue;
}
let mut id_iter = elements
.iter()
.filter(|elem| is_named_element_with_id_attribute(elem));
if let Some(first) = id_iter.next() {
match names_with_first_named_element_map.entry(id) {
Entry::Vacant(entry) => drop(entry.insert(first)),
Entry::Occupied(mut entry) => {
if first.upcast::<Node>().is_before(entry.get().upcast()) {
*entry.get_mut() = first;
}
},
}
}
}
let mut names_with_first_named_element_vec: Vec<(&Atom, &Element)> =
names_with_first_named_element_map
.iter()
.map(|(k, v)| (*k, *v))
.collect();
names_with_first_named_element_vec.sort_unstable_by(|a, b| {
if a.1 == b.1 {
// This can happen if an img has an id different from its name,
// spec does not say which string to put first.
a.0.cmp(b.0)
} else if a.1.upcast::<Node>().is_before(b.1.upcast::<Node>()) {
cmp::Ordering::Less
} else {
cmp::Ordering::Greater
}
});
names_with_first_named_element_vec
.iter()
.map(|(k, _v)| DOMString::from(&***k))
.collect()
}
/// <https://html.spec.whatwg.org/multipage/#dom-structuredclone>
fn StructuredClone(
&self,
cx: JSContext,
value: HandleValue,
options: RootedTraceableBox<StructuredSerializeOptions>,
retval: MutableHandleValue,
) -> Fallible<()> {
self.as_global_scope()
.structured_clone(cx, value, options, retval)
}
}
impl Window {
// https://heycam.github.io/webidl/#named-properties-object
// https://html.spec.whatwg.org/multipage/#named-access-on-the-window-object
#[allow(unsafe_code)]
pub(crate) fn create_named_properties_object(
cx: JSContext,
proto: HandleObject,
object: MutableHandleObject,
) {
window_named_properties::create(cx, proto, object)
}
pub(crate) fn current_event(&self) -> Option<DomRoot<Event>> {
self.current_event
.borrow()
.as_ref()
.map(|e| DomRoot::from_ref(&**e))
}
pub(crate) fn set_current_event(&self, event: Option<&Event>) -> Option<DomRoot<Event>> {
let current = self.current_event();
*self.current_event.borrow_mut() = event.map(Dom::from_ref);
current
}
/// <https://html.spec.whatwg.org/multipage/#window-post-message-steps>
fn post_message_impl(
&self,
target_origin: &USVString,
source_origin: ImmutableOrigin,
source: &Window,
cx: JSContext,
message: HandleValue,
transfer: CustomAutoRooterGuard<Vec<*mut JSObject>>,
) -> ErrorResult {
// Step 1-2, 6-8.
let data = structuredclone::write(cx, message, Some(transfer))?;
// Step 3-5.
let target_origin = match target_origin.0[..].as_ref() {
"*" => None,
"/" => Some(source_origin.clone()),
url => match ServoUrl::parse(url) {
Ok(url) => Some(url.origin().clone()),
Err(_) => return Err(Error::Syntax),
},
};
// Step 9.
self.post_message(target_origin, source_origin, &source.window_proxy(), data);
Ok(())
}
// https://drafts.css-houdini.org/css-paint-api-1/#paint-worklet
pub(crate) fn paint_worklet(&self) -> DomRoot<Worklet> {
self.paint_worklet.or_init(|| self.new_paint_worklet())
}
pub(crate) fn has_document(&self) -> bool {
self.document.get().is_some()
}
pub(crate) fn clear_js_runtime(&self) {
self.as_global_scope()
.remove_web_messaging_and_dedicated_workers_infra();
// Clean up any active promises
// https://github.com/servo/servo/issues/15318
if let Some(custom_elements) = self.custom_element_registry.get() {
custom_elements.teardown();
}
// The above code may not catch all DOM objects (e.g. DOM
// objects removed from the tree that haven't been collected
// yet). There should not be any such DOM nodes with layout
// data, but if there are, then when they are dropped, they
// will attempt to send a message to layout.
// This causes memory safety issues, because the DOM node uses
// the layout channel from its window, and the window has
// already been GC'd. For nodes which do not have a live
// pointer, we can avoid this by GCing now:
self.Gc();
// but there may still be nodes being kept alive by user
// script.
// TODO: ensure that this doesn't happen!
self.current_state.set(WindowState::Zombie);
*self.js_runtime.borrow_mut() = None;
// If this is the currently active pipeline,
// nullify the window_proxy.
if let Some(proxy) = self.window_proxy.get() {
let pipeline_id = self.pipeline_id();
if let Some(currently_active) = proxy.currently_active() {
if currently_active == pipeline_id {
self.window_proxy.set(None);
}
}
}
if let Some(performance) = self.performance.get() {
performance.clear_and_disable_performance_entry_buffer();
}
self.as_global_scope()
.task_manager()
.cancel_all_tasks_and_ignore_future_tasks();
}
/// <https://drafts.csswg.org/cssom-view/#dom-window-scroll>
pub(crate) fn scroll(&self, x_: f64, y_: f64, behavior: ScrollBehavior, can_gc: CanGc) {
// Step 3
let xfinite = if x_.is_finite() { x_ } else { 0.0f64 };
let yfinite = if y_.is_finite() { y_ } else { 0.0f64 };
// TODO Step 4 - determine if a window has a viewport
// Step 5 & 6
// TODO: Remove scrollbar dimensions.
let viewport = self.window_size.get().initial_viewport;
// Step 7 & 8
// TODO: Consider `block-end` and `inline-end` overflow direction.
let scrolling_area = self.scrolling_area_query(None, can_gc);
let x = xfinite
.min(scrolling_area.width() as f64 - viewport.width as f64)
.max(0.0f64);
let y = yfinite
.min(scrolling_area.height() as f64 - viewport.height as f64)
.max(0.0f64);
// Step 10
//TODO handling ongoing smooth scrolling
if x == self.ScrollX() as f64 && y == self.ScrollY() as f64 {
return;
}
//TODO Step 11
//let document = self.Document();
// Step 12
let x = x.to_f32().unwrap_or(0.0f32);
let y = y.to_f32().unwrap_or(0.0f32);
self.update_viewport_for_scroll(x, y);
self.perform_a_scroll(
x,
y,
self.pipeline_id().root_scroll_id(),
behavior,
None,
can_gc,
);
}
/// <https://drafts.csswg.org/cssom-view/#perform-a-scroll>
pub(crate) fn perform_a_scroll(
&self,
x: f32,
y: f32,
scroll_id: ExternalScrollId,
_behavior: ScrollBehavior,
_element: Option<&Element>,
can_gc: CanGc,
) {
// TODO Step 1
// TODO(mrobinson, #18709): Add smooth scrolling support to WebRender so that we can
// properly process ScrollBehavior here.
self.reflow(
ReflowGoal::UpdateScrollNode(ScrollState {
scroll_id,
scroll_offset: Vector2D::new(-x, -y),
}),
can_gc,
);
}
pub(crate) fn update_viewport_for_scroll(&self, x: f32, y: f32) {
let size = self.current_viewport.get().size;
let new_viewport = Rect::new(Point2D::new(Au::from_f32_px(x), Au::from_f32_px(y)), size);
self.current_viewport.set(new_viewport)
}
pub(crate) fn device_pixel_ratio(&self) -> Scale<f32, CSSPixel, DevicePixel> {
self.window_size.get().device_pixel_ratio
}
fn client_window(&self) -> (Size2D<u32, CSSPixel>, Point2D<i32, CSSPixel>) {
let timer_profile_chan = self.global().time_profiler_chan().clone();
let (send, recv) =
ProfiledIpc::channel::<DeviceIndependentIntRect>(timer_profile_chan).unwrap();
let _ = self
.compositor_api
.sender()
.send(webrender_traits::CrossProcessCompositorMessage::GetClientWindowRect(send));
let rect = recv.recv().unwrap_or_default();
(
Size2D::new(rect.size().width as u32, rect.size().height as u32),
Point2D::new(rect.min.x, rect.min.y),
)
}
/// Prepares to tick animations and then does a reflow which also advances the
/// layout animation clock.
#[allow(unsafe_code)]
pub(crate) fn advance_animation_clock(&self, delta_ms: i32) {
self.Document()
.advance_animation_timeline_for_testing(delta_ms as f64 / 1000.);
ScriptThread::handle_tick_all_animations_for_testing(self.pipeline_id());
}
/// Reflows the page unconditionally if possible and not suppressed. This method will wait for
/// the layout to complete. If there is no window size yet, the page is presumed invisible and
/// no reflow is performed. If reflow is suppressed, no reflow will be performed for ForDisplay
/// goals.
///
/// Returns true if layout actually happened, false otherwise.
///
/// NOTE: This method should almost never be called directly! Layout and rendering updates should
/// happen as part of the HTML event loop via *update the rendering*.
#[allow(unsafe_code)]
fn force_reflow(
&self,
reflow_goal: ReflowGoal,
condition: Option<ReflowTriggerCondition>,
) -> bool {
self.Document().ensure_safe_to_run_script_or_layout();
// If layouts are blocked, we block all layouts that are for display only. Other
// layouts (for queries and scrolling) are not blocked, as they do not display
// anything and script excpects the layout to be up-to-date after they run.
let layout_blocked = self.layout_blocker.get().layout_blocked();
let pipeline_id = self.pipeline_id();
if reflow_goal == ReflowGoal::UpdateTheRendering && layout_blocked {
debug!("Suppressing pre-load-event reflow pipeline {pipeline_id}");
return false;
}
if condition != Some(ReflowTriggerCondition::PaintPostponed) {
debug!(
"Invalidating layout cache due to reflow condition {:?}",
condition
);
// Invalidate any existing cached layout values.
self.layout_marker.borrow().set(false);
// Create a new layout caching token.
*self.layout_marker.borrow_mut() = Rc::new(Cell::new(true));
} else {
debug!("Not invalidating cached layout values for paint-only reflow.");
}
debug!("script: performing reflow for goal {reflow_goal:?}");
let marker = if self.need_emit_timeline_marker(TimelineMarkerType::Reflow) {
Some(TimelineMarker::start("Reflow".to_owned()))
} else {
None
};
// On debug mode, print the reflow event information.
if self.relayout_event {
debug_reflow_events(pipeline_id, &reflow_goal);
}
let document = self.Document();
let stylesheets_changed = document.flush_stylesheets_for_reflow();
// If this reflow is for display, ensure webgl canvases are composited with
// up-to-date contents.
let for_display = reflow_goal.needs_display();
if for_display {
document.flush_dirty_webgl_canvases();
}
let pending_restyles = document.drain_pending_restyles();
let dirty_root = document
.take_dirty_root()
.filter(|_| !stylesheets_changed)
.or_else(|| document.GetDocumentElement())
.map(|root| root.upcast::<Node>().to_trusted_node_address());
// Send new document and relevant styles to layout.
let reflow = ReflowRequest {
reflow_info: Reflow {
page_clip_rect: self.page_clip_rect.get(),
},
document: document.upcast::<Node>().to_trusted_node_address(),
dirty_root,
stylesheets_changed,
window_size: self.window_size.get(),
origin: self.origin().immutable().clone(),
reflow_goal,
dom_count: document.dom_count(),
pending_restyles,
animation_timeline_value: document.current_animation_timeline_value(),
animations: document.animations().sets.clone(),
theme: self.theme.get(),
};
let Some(results) = self.layout.borrow_mut().reflow(reflow) else {
return false;
};
debug!("script: layout complete");
if let Some(marker) = marker {
self.emit_timeline_marker(marker.end());
}
// Either this reflow caused new contents to be displayed or on the next
// full layout attempt a reflow should be forced in order to update the
// visual contents of the page. A case where full display might be delayed
// is when reflowing just for the purpose of doing a layout query.
document.set_needs_paint(!for_display);
for image in results.pending_images {
let id = image.id;
let node = unsafe { from_untrusted_node_address(image.node) };
if let PendingImageState::Unrequested(ref url) = image.state {
fetch_image_for_layout(url.clone(), &node, id, self.image_cache.clone());
}
let mut images = self.pending_layout_images.borrow_mut();
let nodes = images.entry(id).or_default();
if !nodes.iter().any(|n| std::ptr::eq(&**n, &*node)) {
let trusted_node = Trusted::new(&*node);
let sender = self.register_image_cache_listener(id, move |response| {
trusted_node
.root()
.owner_window()
.pending_layout_image_notification(response);
});
self.image_cache
.add_listener(ImageResponder::new(sender, self.pipeline_id(), id));
nodes.push(Dom::from_ref(&*node));
}
}
let size_messages = self
.Document()
.iframes_mut()
.handle_new_iframe_sizes_after_layout(results.iframe_sizes, self.device_pixel_ratio());
if !size_messages.is_empty() {
self.send_to_constellation(ScriptMsg::IFrameSizes(size_messages));
}
document.update_animations_post_reflow();
self.update_constellation_epoch();
true
}
/// Reflows the page if it's possible to do so and the page is dirty. Returns true if layout
/// actually happened, false otherwise.
///
/// NOTE: This method should almost never be called directly! Layout and rendering updates
/// should happen as part of the HTML event loop via *update the rendering*. Currerntly, the
/// only exceptions are script queries and scroll requests.
pub(crate) fn reflow(&self, reflow_goal: ReflowGoal, can_gc: CanGc) -> bool {
// Count the pending web fonts before layout, in case a font loads during the layout.
let waiting_for_web_fonts_to_load = self.font_context.web_fonts_still_loading() != 0;
self.Document().ensure_safe_to_run_script_or_layout();
let mut issued_reflow = false;
let condition = self.Document().needs_reflow();
let updating_the_rendering = reflow_goal == ReflowGoal::UpdateTheRendering;
let for_display = reflow_goal.needs_display();
if !updating_the_rendering || condition.is_some() {
debug!("Reflowing document ({:?})", self.pipeline_id());
issued_reflow = self.force_reflow(reflow_goal, condition);
// We shouldn't need a reflow immediately after a completed reflow, unless the reflow didn't
// display anything and it wasn't for display. Queries can cause this to happen.
if issued_reflow {
let condition = self.Document().needs_reflow();
let display_is_pending = condition == Some(ReflowTriggerCondition::PaintPostponed);
assert!(
condition.is_none() || (display_is_pending && !for_display),
"Needed reflow after reflow: {:?}",
condition
);
}
} else {
debug!(
"Document ({:?}) doesn't need reflow - skipping it (goal {reflow_goal:?})",
self.pipeline_id()
);
}
let document = self.Document();
let font_face_set = document.Fonts(can_gc);
let is_ready_state_complete = document.ReadyState() == DocumentReadyState::Complete;
// From https://drafts.csswg.org/css-font-loading/#font-face-set-ready:
// > A FontFaceSet is pending on the environment if any of the following are true:
// > - the document is still loading
// > - the document has pending stylesheet requests
// > - the document has pending layout operations which might cause the user agent to request
// > a font, or which depend on recently-loaded fonts
//
// Thus, we are queueing promise resolution here. This reflow should have been triggered by
// a "rendering opportunity" in `ScriptThread::handle_web_font_loaded, which should also
// make sure a microtask checkpoint happens, triggering the promise callback.
if !waiting_for_web_fonts_to_load && is_ready_state_complete {
font_face_set.fulfill_ready_promise_if_needed();
}
// If writing a screenshot, check if the script has reached a state
// where it's safe to write the image. This means that:
// 1) The reflow is for display (otherwise it could be a query)
// 2) The html element doesn't contain the 'reftest-wait' class
// 3) The load event has fired.
// When all these conditions are met, notify the constellation
// that this pipeline is ready to write the image (from the script thread
// perspective at least).
if opts::get().wait_for_stable_image && updating_the_rendering {
// Checks if the html element has reftest-wait attribute present.
// See http://testthewebforward.org/docs/reftests.html
// and https://web-platform-tests.org/writing-tests/crashtest.html
let html_element = document.GetDocumentElement();
let reftest_wait = html_element.is_some_and(|elem| {
elem.has_class(&atom!("reftest-wait"), CaseSensitivity::CaseSensitive) ||
elem.has_class(&Atom::from("test-wait"), CaseSensitivity::CaseSensitive)
});
let has_sent_idle_message = self.has_sent_idle_message.get();
let pending_images = !self.pending_layout_images.borrow().is_empty();
if !has_sent_idle_message &&
is_ready_state_complete &&
!reftest_wait &&
!pending_images &&
!waiting_for_web_fonts_to_load
{
debug!(
"{:?}: Sending DocumentState::Idle to Constellation",
self.pipeline_id()
);
let event = ScriptMsg::SetDocumentState(DocumentState::Idle);
self.send_to_constellation(event);
self.has_sent_idle_message.set(true);
}
}
issued_reflow
}
/// If parsing has taken a long time and reflows are still waiting for the `load` event,
/// start allowing them. See <https://github.com/servo/servo/pull/6028>.
pub(crate) fn reflow_if_reflow_timer_expired(&self, can_gc: CanGc) {
// Only trigger a long parsing time reflow if we are in the first parse of `<body>`
// and it started more than `INITIAL_REFLOW_DELAY` ago.
if !matches!(
self.layout_blocker.get(),
LayoutBlocker::Parsing(instant) if instant + INITIAL_REFLOW_DELAY < Instant::now()
) {
return;
}
self.allow_layout_if_necessary(can_gc);
}
/// Block layout for this `Window` until parsing is done. If parsing takes a long time,
/// we want to layout anyway, so schedule a moment in the future for when layouts are
/// allowed even though parsing isn't finished and we havne't sent a load event.
pub(crate) fn prevent_layout_until_load_event(&self) {
// If we have already started parsing or have already fired a load event, then
// don't delay the first layout any longer.
if !matches!(self.layout_blocker.get(), LayoutBlocker::WaitingForParse) {
return;
}
self.layout_blocker
.set(LayoutBlocker::Parsing(Instant::now()));
}
/// Inform the [`Window`] that layout is allowed either because `load` has happened
/// or because parsing the `<body>` took so long that we cannot wait any longer.
pub(crate) fn allow_layout_if_necessary(&self, can_gc: CanGc) {
if matches!(
self.layout_blocker.get(),
LayoutBlocker::FiredLoadEventOrParsingTimerExpired
) {
return;
}
self.layout_blocker
.set(LayoutBlocker::FiredLoadEventOrParsingTimerExpired);
self.Document().set_needs_paint(true);
// We do this immediately instead of scheduling a future task, because this can
// happen if parsing is taking a very long time, which means that the
// `ScriptThread` is busy doing the parsing and not doing layouts.
//
// TOOD(mrobinson): It's expected that this is necessary when in the process of
// parsing, as we need to interrupt it to update contents, but why is this
// necessary when parsing finishes? Not doing the synchronous update in that case
// causes iframe tests to become flaky. It seems there's an issue with the timing of
// iframe size updates.
//
// See <https://github.com/servo/servo/issues/14719>
self.reflow(ReflowGoal::UpdateTheRendering, can_gc);
}
pub(crate) fn layout_blocked(&self) -> bool {
self.layout_blocker.get().layout_blocked()
}
/// If writing a screenshot, synchronously update the layout epoch that it set
/// in the constellation.
pub(crate) fn update_constellation_epoch(&self) {
if !opts::get().wait_for_stable_image {
return;
}
let epoch = self.layout.borrow().current_epoch();
debug!(
"{:?}: Updating constellation epoch: {epoch:?}",
self.pipeline_id()
);
let (sender, receiver) = ipc::channel().expect("Failed to create IPC channel!");
let event = ScriptMsg::SetLayoutEpoch(epoch, sender);
self.send_to_constellation(event);
let _ = receiver.recv();
}
pub(crate) fn layout_reflow(&self, query_msg: QueryMsg, can_gc: CanGc) -> bool {
self.reflow(ReflowGoal::LayoutQuery(query_msg), can_gc)
}
pub(crate) fn resolved_font_style_query(
&self,
node: &Node,
value: String,
can_gc: CanGc,
) -> Option<ServoArc<Font>> {
if !self.layout_reflow(QueryMsg::ResolvedFontStyleQuery, can_gc) {
return None;
}
let document = self.Document();
let animations = document.animations().sets.clone();
self.layout.borrow().query_resolved_font_style(
node.to_trusted_node_address(),
&value,
animations,
document.current_animation_timeline_value(),
)
}
pub(crate) fn content_box_query(&self, node: &Node, can_gc: CanGc) -> Option<UntypedRect<Au>> {
if !self.layout_reflow(QueryMsg::ContentBox, can_gc) {
return None;
}
self.layout.borrow().query_content_box(node.to_opaque())
}
pub(crate) fn content_boxes_query(&self, node: &Node, can_gc: CanGc) -> Vec<UntypedRect<Au>> {
if !self.layout_reflow(QueryMsg::ContentBoxes, can_gc) {
return vec![];
}
self.layout.borrow().query_content_boxes(node.to_opaque())
}
pub(crate) fn client_rect_query(&self, node: &Node, can_gc: CanGc) -> UntypedRect<i32> {
if !self.layout_reflow(QueryMsg::ClientRectQuery, can_gc) {
return Rect::zero();
}
self.layout.borrow().query_client_rect(node.to_opaque())
}
/// Find the scroll area of the given node, if it is not None. If the node
/// is None, find the scroll area of the viewport.
pub(crate) fn scrolling_area_query(
&self,
node: Option<&Node>,
can_gc: CanGc,
) -> UntypedRect<i32> {
let opaque = node.map(|node| node.to_opaque());
if !self.layout_reflow(QueryMsg::ScrollingAreaQuery, can_gc) {
return Rect::zero();
}
self.layout.borrow().query_scrolling_area(opaque)
}
pub(crate) fn scroll_offset_query(&self, node: &Node) -> Vector2D<f32, LayoutPixel> {
if let Some(scroll_offset) = self.scroll_offsets.borrow().get(&node.to_opaque()) {
return *scroll_offset;
}
Vector2D::new(0.0, 0.0)
}
// https://drafts.csswg.org/cssom-view/#element-scrolling-members
pub(crate) fn scroll_node(
&self,
node: &Node,
x_: f64,
y_: f64,
behavior: ScrollBehavior,
can_gc: CanGc,
) {
// The scroll offsets are immediatly updated since later calls
// to topScroll and others may access the properties before
// webrender has a chance to update the offsets.
self.scroll_offsets
.borrow_mut()
.insert(node.to_opaque(), Vector2D::new(x_ as f32, y_ as f32));
let scroll_id = ExternalScrollId(
combine_id_with_fragment_type(node.to_opaque().id(), FragmentType::FragmentBody),
self.pipeline_id().into(),
);
// Step 12
self.perform_a_scroll(
x_.to_f32().unwrap_or(0.0f32),
y_.to_f32().unwrap_or(0.0f32),
scroll_id,
behavior,
None,
can_gc,
);
}
pub(crate) fn resolved_style_query(
&self,
element: TrustedNodeAddress,
pseudo: Option<PseudoElement>,
property: PropertyId,
can_gc: CanGc,
) -> DOMString {
if !self.layout_reflow(QueryMsg::ResolvedStyleQuery, can_gc) {
return DOMString::new();
}
let document = self.Document();
let animations = document.animations().sets.clone();
DOMString::from(self.layout.borrow().query_resolved_style(
element,
pseudo,
property,
animations,
document.current_animation_timeline_value(),
))
}
/// If the given |browsing_context_id| refers to an `<iframe>` that is an element
/// in this [`Window`] and that `<iframe>` has been laid out, return its size.
/// Otherwise, return `None`.
pub(crate) fn get_iframe_size_if_known(
&self,
browsing_context_id: BrowsingContextId,
can_gc: CanGc,
) -> Option<Size2D<f32, CSSPixel>> {
// Reflow might fail, but do a best effort to return the right size.
self.layout_reflow(QueryMsg::InnerWindowDimensionsQuery, can_gc);
self.Document()
.iframes()
.get(browsing_context_id)
.and_then(|iframe| iframe.size)
}
#[allow(unsafe_code)]
pub(crate) fn offset_parent_query(
&self,
node: &Node,
can_gc: CanGc,
) -> (Option<DomRoot<Element>>, UntypedRect<Au>) {
if !self.layout_reflow(QueryMsg::OffsetParentQuery, can_gc) {
return (None, Rect::zero());
}
let response = self.layout.borrow().query_offset_parent(node.to_opaque());
let element = response.node_address.and_then(|parent_node_address| {
let node = unsafe { from_untrusted_node_address(parent_node_address) };
DomRoot::downcast(node)
});
(element, response.rect)
}
pub(crate) fn text_index_query(
&self,
node: &Node,
point_in_node: UntypedPoint2D<f32>,
can_gc: CanGc,
) -> Option<usize> {
if !self.layout_reflow(QueryMsg::TextIndexQuery, can_gc) {
return None;
}
self.layout
.borrow()
.query_text_indext(node.to_opaque(), point_in_node)
}
#[allow(unsafe_code)]
pub(crate) fn init_window_proxy(&self, window_proxy: &WindowProxy) {
assert!(self.window_proxy.get().is_none());
self.window_proxy.set(Some(window_proxy));
}
#[allow(unsafe_code)]
pub(crate) fn init_document(&self, document: &Document) {
assert!(self.document.get().is_none());
assert!(document.window() == self);
self.document.set(Some(document));
if self.unminify_css {
*self.unminified_css_dir.borrow_mut() = Some(unminified_path("unminified-css"));
}
}
/// Commence a new URL load which will either replace this window or scroll to a fragment.
///
/// <https://html.spec.whatwg.org/multipage/#navigating-across-documents>
pub(crate) fn load_url(
&self,
history_handling: NavigationHistoryBehavior,
force_reload: bool,
load_data: LoadData,
can_gc: CanGc,
) {
let doc = self.Document();
// Step 3. Let initiatorOriginSnapshot be sourceDocument's origin.
let initiator_origin_snapshot = &load_data.load_origin;
// TODO: Important re security. See https://github.com/servo/servo/issues/23373
// Step 5. check that the source browsing-context is "allowed to navigate" this window.
if !force_reload &&
load_data.url.as_url()[..Position::AfterQuery] ==
doc.url().as_url()[..Position::AfterQuery]
{
// Step 6
// TODO: Fragment handling appears to have moved to step 13
if let Some(fragment) = load_data.url.fragment() {
self.send_to_constellation(ScriptMsg::NavigatedToFragment(
load_data.url.clone(),
history_handling,
));
doc.check_and_scroll_fragment(fragment, can_gc);
let this = Trusted::new(self);
let old_url = doc.url().into_string();
let new_url = load_data.url.clone().into_string();
let task = task!(hashchange_event: move || {
let this = this.root();
let event = HashChangeEvent::new(
&this,
atom!("hashchange"),
false,
false,
old_url,
new_url,
CanGc::note());
event.upcast::<Event>().fire(this.upcast::<EventTarget>(), CanGc::note());
});
self.as_global_scope()
.task_manager()
.dom_manipulation_task_source()
.queue(task);
doc.set_url(load_data.url.clone());
return;
}
}
// Step 4 and 5
let pipeline_id = self.pipeline_id();
let window_proxy = self.window_proxy();
if let Some(active) = window_proxy.currently_active() {
if pipeline_id == active && doc.is_prompting_or_unloading() {
return;
}
}
// Step 8
if doc.prompt_to_unload(false, can_gc) {
let window_proxy = self.window_proxy();
if window_proxy.parent().is_some() {
// Step 10
// If browsingContext is a nested browsing context,
// then put it in the delaying load events mode.
window_proxy.start_delaying_load_events_mode();
}
// Step 11. If historyHandling is "auto", then:
let resolved_history_handling = if history_handling == NavigationHistoryBehavior::Auto {
// Step 11.1. If url equals navigable's active document's URL, and
// initiatorOriginSnapshot is same origin with targetNavigable's active document's
// origin, then set historyHandling to "replace".
// Note: `targetNavigable` is not actually defined in the spec, "active document" is
// assumed to be the correct reference based on WPT results
if let LoadOrigin::Script(initiator_origin) = initiator_origin_snapshot {
if load_data.url == doc.url() && initiator_origin.same_origin(doc.origin()) {
NavigationHistoryBehavior::Replace
} else {
NavigationHistoryBehavior::Push
}
} else {
// Step 11.2. Otherwise, set historyHandling to "push".
NavigationHistoryBehavior::Push
}
// Step 12. If the navigation must be a replace given url and navigable's active
// document, then set historyHandling to "replace".
} else if load_data.url.scheme() == "javascript" || doc.is_initial_about_blank() {
NavigationHistoryBehavior::Replace
} else {
NavigationHistoryBehavior::Push
};
// Step 13
ScriptThread::navigate(
window_proxy.browsing_context_id(),
pipeline_id,
load_data,
resolved_history_handling,
);
};
}
pub(crate) fn set_window_size(&self, size: WindowSizeData) {
self.window_size.set(size);
}
pub(crate) fn window_size(&self) -> WindowSizeData {
self.window_size.get()
}
/// Handle a theme change request, triggering a reflow is any actual change occured.
pub(crate) fn handle_theme_change(&self, new_theme: Theme) {
let new_theme = match new_theme {
Theme::Light => PrefersColorScheme::Light,
Theme::Dark => PrefersColorScheme::Dark,
};
if self.theme.get() == new_theme {
return;
}
self.theme.set(new_theme);
self.Document().set_needs_paint(true);
}
pub(crate) fn get_url(&self) -> ServoUrl {
self.Document().url()
}
pub(crate) fn windowproxy_handler(&self) -> &'static WindowProxyHandler {
self.dom_static.windowproxy_handler
}
pub(crate) fn add_resize_event(&self, event: WindowSizeData, event_type: WindowSizeType) {
// Whenever we receive a new resize event we forget about all the ones that came before
// it, to avoid unnecessary relayouts
*self.unhandled_resize_event.borrow_mut() = Some((event, event_type))
}
pub(crate) fn take_unhandled_resize_event(&self) -> Option<(WindowSizeData, WindowSizeType)> {
self.unhandled_resize_event.borrow_mut().take()
}
pub(crate) fn set_page_clip_rect_with_new_viewport(&self, viewport: UntypedRect<f32>) -> bool {
let rect = f32_rect_to_au_rect(viewport);
self.current_viewport.set(rect);
// We use a clipping rectangle that is five times the size of the of the viewport,
// so that we don't collect display list items for areas too far outside the viewport,
// but also don't trigger reflows every time the viewport changes.
static VIEWPORT_EXPANSION: f32 = 2.0; // 2 lengths on each side plus original length is 5 total.
let proposed_clip_rect = f32_rect_to_au_rect(viewport.inflate(
viewport.size.width * VIEWPORT_EXPANSION,
viewport.size.height * VIEWPORT_EXPANSION,
));
let clip_rect = self.page_clip_rect.get();
if proposed_clip_rect == clip_rect {
return false;
}
let had_clip_rect = clip_rect != MaxRect::max_rect();
if had_clip_rect && !should_move_clip_rect(clip_rect, viewport) {
return false;
}
self.page_clip_rect.set(proposed_clip_rect);
// The document needs to be repainted, because the initial containing block
// is now a different size.
self.Document().set_needs_paint(true);
// If we didn't have a clip rect, the previous display doesn't need rebuilding
// because it was built for infinite clip (MaxRect::amax_rect()).
had_clip_rect
}
pub(crate) fn suspend(&self) {
// Suspend timer events.
self.as_global_scope().suspend();
// Set the window proxy to be a cross-origin window.
if self.window_proxy().currently_active() == Some(self.global().pipeline_id()) {
self.window_proxy().unset_currently_active();
}
// A hint to the JS runtime that now would be a good time to
// GC any unreachable objects generated by user script,
// or unattached DOM nodes. Attached DOM nodes can't be GCd yet,
// as the document might be reactivated later.
self.Gc();
}
pub(crate) fn resume(&self) {
// Resume timer events.
self.as_global_scope().resume();
// Set the window proxy to be this object.
self.window_proxy().set_currently_active(self);
// Push the document title to the compositor since we are
// activating this document due to a navigation.
self.Document().title_changed();
}
pub(crate) fn need_emit_timeline_marker(&self, timeline_type: TimelineMarkerType) -> bool {
let markers = self.devtools_markers.borrow();
markers.contains(&timeline_type)
}
pub(crate) fn emit_timeline_marker(&self, marker: TimelineMarker) {
let sender = self.devtools_marker_sender.borrow();
let sender = sender.as_ref().expect("There is no marker sender");
sender.send(Some(marker)).unwrap();
}
pub(crate) fn set_devtools_timeline_markers(
&self,
markers: Vec<TimelineMarkerType>,
reply: IpcSender<Option<TimelineMarker>>,
) {
*self.devtools_marker_sender.borrow_mut() = Some(reply);
self.devtools_markers.borrow_mut().extend(markers);
}
pub(crate) fn drop_devtools_timeline_markers(&self, markers: Vec<TimelineMarkerType>) {
let mut devtools_markers = self.devtools_markers.borrow_mut();
for marker in markers {
devtools_markers.remove(&marker);
}
if devtools_markers.is_empty() {
*self.devtools_marker_sender.borrow_mut() = None;
}
}
pub(crate) fn set_webdriver_script_chan(&self, chan: Option<IpcSender<WebDriverJSResult>>) {
*self.webdriver_script_chan.borrow_mut() = chan;
}
pub(crate) fn is_alive(&self) -> bool {
self.current_state.get() == WindowState::Alive
}
// https://html.spec.whatwg.org/multipage/#top-level-browsing-context
pub(crate) fn is_top_level(&self) -> bool {
self.parent_info.is_none()
}
/// An implementation of:
/// <https://drafts.csswg.org/cssom-view/#document-run-the-resize-steps>
///
/// Returns true if there were any pending resize events.
pub(crate) fn run_the_resize_steps(&self, can_gc: CanGc) -> bool {
let Some((new_size, size_type)) = self.take_unhandled_resize_event() else {
return false;
};
if self.window_size() == new_size {
return false;
}
let _realm = enter_realm(self);
debug!(
"Resizing Window for pipeline {:?} from {:?} to {new_size:?}",
self.pipeline_id(),
self.window_size(),
);
self.set_window_size(new_size);
// http://dev.w3.org/csswg/cssom-view/#resizing-viewports
if size_type == WindowSizeType::Resize {
let uievent = UIEvent::new(
self,
DOMString::from("resize"),
EventBubbles::DoesNotBubble,
EventCancelable::NotCancelable,
Some(self),
0i32,
can_gc,
);
uievent.upcast::<Event>().fire(self.upcast(), can_gc);
}
// The document needs to be repainted, because the initial containing block
// is now a different size.
self.Document().set_needs_paint(true);
true
}
/// Evaluate media query lists and report changes
/// <https://drafts.csswg.org/cssom-view/#evaluate-media-queries-and-report-changes>
pub(crate) fn evaluate_media_queries_and_report_changes(&self, can_gc: CanGc) {
let _realm = enter_realm(self);
rooted_vec!(let mut mql_list);
self.media_query_lists.for_each(|mql| {
if let MediaQueryListMatchState::Changed = mql.evaluate_changes() {
// Recording list of changed Media Queries
mql_list.push(Dom::from_ref(&*mql));
}
});
// Sending change events for all changed Media Queries
for mql in mql_list.iter() {
let event = MediaQueryListEvent::new(
&mql.global(),
atom!("change"),
false,
false,
mql.Media(),
mql.Matches(),
can_gc,
);
event
.upcast::<Event>()
.fire(mql.upcast::<EventTarget>(), can_gc);
}
}
/// Set whether to use less resources by running timers at a heavily limited rate.
pub(crate) fn set_throttled(&self, throttled: bool) {
self.throttled.set(throttled);
if throttled {
self.as_global_scope().slow_down_timers();
} else {
self.as_global_scope().speed_up_timers();
}
}
pub(crate) fn throttled(&self) -> bool {
self.throttled.get()
}
pub(crate) fn unminified_css_dir(&self) -> Option<String> {
self.unminified_css_dir.borrow().clone()
}
pub(crate) fn local_script_source(&self) -> &Option<String> {
&self.local_script_source
}
pub(crate) fn set_navigation_start(&self) {
self.navigation_start.set(CrossProcessInstant::now());
}
pub(crate) fn send_to_embedder(&self, msg: EmbedderMsg) {
self.send_to_constellation(ScriptMsg::ForwardToEmbedder(msg));
}
pub(crate) fn send_to_constellation(&self, msg: ScriptMsg) {
self.as_global_scope()
.script_to_constellation_chan()
.send(msg)
.unwrap();
}
pub(crate) fn webrender_document(&self) -> DocumentId {
self.webrender_document
}
#[cfg(feature = "webxr")]
pub(crate) fn in_immersive_xr_session(&self) -> bool {
self.navigator
.get()
.as_ref()
.and_then(|nav| nav.xr())
.is_some_and(|xr| xr.pending_or_active_session())
}
#[cfg(not(feature = "webxr"))]
pub(crate) fn in_immersive_xr_session(&self) -> bool {
false
}
}
impl Window {
#[allow(unsafe_code)]
#[allow(clippy::too_many_arguments)]
pub(crate) fn new(
webview_id: WebViewId,
runtime: Rc<Runtime>,
script_chan: Sender<MainThreadScriptMsg>,
layout: Box<dyn Layout>,
font_context: Arc<FontContext>,
image_cache_sender: IpcSender<PendingImageResponse>,
image_cache: Arc<dyn ImageCache>,
resource_threads: ResourceThreads,
#[cfg(feature = "bluetooth")] bluetooth_thread: IpcSender<BluetoothRequest>,
mem_profiler_chan: MemProfilerChan,
time_profiler_chan: TimeProfilerChan,
devtools_chan: Option<IpcSender<ScriptToDevtoolsControlMsg>>,
constellation_chan: ScriptToConstellationChan,
control_chan: IpcSender<ScriptThreadMessage>,
pipeline_id: PipelineId,
parent_info: Option<PipelineId>,
window_size: WindowSizeData,
origin: MutableOrigin,
creator_url: ServoUrl,
navigation_start: CrossProcessInstant,
webgl_chan: Option<WebGLChan>,
#[cfg(feature = "webxr")] webxr_registry: Option<webxr_api::Registry>,
microtask_queue: Rc<MicrotaskQueue>,
webrender_document: DocumentId,
compositor_api: CrossProcessCompositorApi,
relayout_event: bool,
unminify_js: bool,
unminify_css: bool,
local_script_source: Option<String>,
userscripts_path: Option<String>,
user_agent: Cow<'static, str>,
player_context: WindowGLContext,
#[cfg(feature = "webgpu")] gpu_id_hub: Arc<IdentityHub>,
inherited_secure_context: Option<bool>,
) -> DomRoot<Self> {
let error_reporter = CSSErrorReporter {
pipelineid: pipeline_id,
script_chan: Arc::new(Mutex::new(control_chan)),
};
let initial_viewport = f32_rect_to_au_rect(UntypedRect::new(
Point2D::zero(),
window_size.initial_viewport.to_untyped(),
));
let win = Box::new(Self {
webview_id,
globalscope: GlobalScope::new_inherited(
pipeline_id,
devtools_chan,
mem_profiler_chan,
time_profiler_chan,
constellation_chan,
resource_threads,
origin,
Some(creator_url),
microtask_queue,
user_agent,
#[cfg(feature = "webgpu")]
gpu_id_hub,
inherited_secure_context,
unminify_js,
),
script_chan,
layout: RefCell::new(layout),
font_context,
image_cache_sender,
image_cache,
navigator: Default::default(),
location: Default::default(),
history: Default::default(),
custom_element_registry: Default::default(),
window_proxy: Default::default(),
document: Default::default(),
performance: Default::default(),
navigation_start: Cell::new(navigation_start),
screen: Default::default(),
session_storage: Default::default(),
local_storage: Default::default(),
status: DomRefCell::new(DOMString::new()),
parent_info,
dom_static: GlobalStaticData::new(),
js_runtime: DomRefCell::new(Some(runtime.clone())),
#[cfg(feature = "bluetooth")]
bluetooth_thread,
#[cfg(feature = "bluetooth")]
bluetooth_extra_permission_data: BluetoothExtraPermissionData::new(),
page_clip_rect: Cell::new(MaxRect::max_rect()),
unhandled_resize_event: Default::default(),
window_size: Cell::new(window_size),
current_viewport: Cell::new(initial_viewport.to_untyped()),
layout_blocker: Cell::new(LayoutBlocker::WaitingForParse),
current_state: Cell::new(WindowState::Alive),
devtools_marker_sender: Default::default(),
devtools_markers: Default::default(),
webdriver_script_chan: Default::default(),
error_reporter,
scroll_offsets: Default::default(),
media_query_lists: DOMTracker::new(),
#[cfg(feature = "bluetooth")]
test_runner: Default::default(),
webgl_chan,
#[cfg(feature = "webxr")]
webxr_registry,
pending_image_callbacks: Default::default(),
pending_layout_images: Default::default(),
unminified_css_dir: Default::default(),
local_script_source,
test_worklet: Default::default(),
paint_worklet: Default::default(),
webrender_document,
exists_mut_observer: Cell::new(false),
compositor_api,
has_sent_idle_message: Cell::new(false),
relayout_event,
unminify_css,
userscripts_path,
player_context,
throttled: Cell::new(false),
layout_marker: DomRefCell::new(Rc::new(Cell::new(true))),
current_event: DomRefCell::new(None),
theme: Cell::new(PrefersColorScheme::Light),
});
unsafe {
WindowBinding::Wrap::<crate::DomTypeHolder>(JSContext::from_ptr(runtime.cx()), win)
}
}
pub(crate) fn pipeline_id(&self) -> PipelineId {
self.as_global_scope().pipeline_id()
}
/// Create a new cached instance of the given value.
pub(crate) fn cache_layout_value<T>(&self, value: T) -> LayoutValue<T>
where
T: Copy + MallocSizeOf,
{
LayoutValue::new(self.layout_marker.borrow().clone(), value)
}
}
/// An instance of a value associated with a particular snapshot of layout. This stored
/// value can only be read as long as the associated layout marker that is considered
/// valid. It will automatically become unavailable when the next layout operation is
/// performed.
#[derive(MallocSizeOf)]
pub(crate) struct LayoutValue<T: MallocSizeOf> {
#[ignore_malloc_size_of = "Rc is hard"]
is_valid: Rc<Cell<bool>>,
value: T,
}
#[allow(unsafe_code)]
unsafe impl<T: JSTraceable + MallocSizeOf> JSTraceable for LayoutValue<T> {
unsafe fn trace(&self, trc: *mut js::jsapi::JSTracer) {
self.value.trace(trc)
}
}
impl<T: Copy + MallocSizeOf> LayoutValue<T> {
fn new(marker: Rc<Cell<bool>>, value: T) -> Self {
LayoutValue {
is_valid: marker,
value,
}
}
/// Retrieve the stored value if it is still valid.
pub(crate) fn get(&self) -> Result<T, ()> {
if self.is_valid.get() {
return Ok(self.value);
}
Err(())
}
}
fn should_move_clip_rect(clip_rect: UntypedRect<Au>, new_viewport: UntypedRect<f32>) -> bool {
let clip_rect = UntypedRect::new(
Point2D::new(
clip_rect.origin.x.to_f32_px(),
clip_rect.origin.y.to_f32_px(),
),
Size2D::new(
clip_rect.size.width.to_f32_px(),
clip_rect.size.height.to_f32_px(),
),
);
// We only need to move the clip rect if the viewport is getting near the edge of
// our preexisting clip rect. We use half of the size of the viewport as a heuristic
// for "close."
static VIEWPORT_SCROLL_MARGIN_SIZE: f32 = 0.5;
let viewport_scroll_margin = new_viewport.size * VIEWPORT_SCROLL_MARGIN_SIZE;
(clip_rect.origin.x - new_viewport.origin.x).abs() <= viewport_scroll_margin.width ||
(clip_rect.max_x() - new_viewport.max_x()).abs() <= viewport_scroll_margin.width ||
(clip_rect.origin.y - new_viewport.origin.y).abs() <= viewport_scroll_margin.height ||
(clip_rect.max_y() - new_viewport.max_y()).abs() <= viewport_scroll_margin.height
}
fn debug_reflow_events(id: PipelineId, reflow_goal: &ReflowGoal) {
let goal_string = match *reflow_goal {
ReflowGoal::UpdateTheRendering => "\tFull",
ReflowGoal::UpdateScrollNode(_) => "\tUpdateScrollNode",
ReflowGoal::LayoutQuery(ref query_msg) => match *query_msg {
QueryMsg::ContentBox => "\tContentBoxQuery",
QueryMsg::ContentBoxes => "\tContentBoxesQuery",
QueryMsg::NodesFromPointQuery => "\tNodesFromPointQuery",
QueryMsg::ClientRectQuery => "\tClientRectQuery",
QueryMsg::ScrollingAreaQuery => "\tNodeScrollGeometryQuery",
QueryMsg::ResolvedStyleQuery => "\tResolvedStyleQuery",
QueryMsg::ResolvedFontStyleQuery => "\nResolvedFontStyleQuery",
QueryMsg::OffsetParentQuery => "\tOffsetParentQuery",
QueryMsg::StyleQuery => "\tStyleQuery",
QueryMsg::TextIndexQuery => "\tTextIndexQuery",
QueryMsg::ElementInnerOuterTextQuery => "\tElementInnerOuterTextQuery",
QueryMsg::InnerWindowDimensionsQuery => "\tInnerWindowDimensionsQuery",
},
};
println!("**** pipeline={id}\t{goal_string}");
}
impl Window {
// https://html.spec.whatwg.org/multipage/#dom-window-postmessage step 7.
pub(crate) fn post_message(
&self,
target_origin: Option<ImmutableOrigin>,
source_origin: ImmutableOrigin,
source: &WindowProxy,
data: StructuredSerializedData,
) {
let this = Trusted::new(self);
let source = Trusted::new(source);
let task = task!(post_serialised_message: move || {
let this = this.root();
let source = source.root();
let document = this.Document();
// Step 7.1.
if let Some(ref target_origin) = target_origin {
if !target_origin.same_origin(document.origin()) {
return;
}
}
// Steps 7.2.-7.5.
let cx = this.get_cx();
let obj = this.reflector().get_jsobject();
let _ac = JSAutoRealm::new(*cx, obj.get());
rooted!(in(*cx) let mut message_clone = UndefinedValue());
if let Ok(ports) = structuredclone::read(this.upcast(), data, message_clone.handle_mut()) {
// Step 7.6, 7.7
MessageEvent::dispatch_jsval(
this.upcast(),
this.upcast(),
message_clone.handle(),
Some(&source_origin.ascii_serialization()),
Some(&*source),
ports,
CanGc::note()
);
} else {
// Step 4, fire messageerror.
MessageEvent::dispatch_error(
this.upcast(),
this.upcast(),
CanGc::note()
);
}
});
// TODO(#12718): Use the "posted message task source".
self.as_global_scope()
.task_manager()
.dom_manipulation_task_source()
.queue(task);
}
}
#[derive(Clone, MallocSizeOf)]
pub(crate) struct CSSErrorReporter {
pub(crate) pipelineid: PipelineId,
// Arc+Mutex combo is necessary to make this struct Sync,
// which is necessary to fulfill the bounds required by the
// uses of the ParseErrorReporter trait.
#[ignore_malloc_size_of = "Arc is defined in libstd"]
pub(crate) script_chan: Arc<Mutex<IpcSender<ScriptThreadMessage>>>,
}
unsafe_no_jsmanaged_fields!(CSSErrorReporter);
impl ParseErrorReporter for CSSErrorReporter {
fn report_error(
&self,
url: &UrlExtraData,
location: SourceLocation,
error: ContextualParseError,
) {
if log_enabled!(log::Level::Info) {
info!(
"Url:\t{}\n{}:{} {}",
url.0.as_str(),
location.line,
location.column,
error
)
}
//TODO: report a real filename
let _ = self
.script_chan
.lock()
.unwrap()
.send(ScriptThreadMessage::ReportCSSError(
self.pipelineid,
url.0.to_string(),
location.line,
location.column,
error.to_string(),
));
}
}
fn is_named_element_with_name_attribute(elem: &Element) -> bool {
let type_ = match elem.upcast::<Node>().type_id() {
NodeTypeId::Element(ElementTypeId::HTMLElement(type_)) => type_,
_ => return false,
};
matches!(
type_,
HTMLElementTypeId::HTMLEmbedElement |
HTMLElementTypeId::HTMLFormElement |
HTMLElementTypeId::HTMLImageElement |
HTMLElementTypeId::HTMLObjectElement
)
}
fn is_named_element_with_id_attribute(elem: &Element) -> bool {
elem.is_html_element()
}
#[allow(unsafe_code)]
#[no_mangle]
/// Helper for interactive debugging sessions in lldb/gdb.
unsafe extern "C" fn dump_js_stack(cx: *mut RawJSContext) {
DumpJSStack(cx, true, false, false);
}
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