forked from mirrors/gecko-dev
07097ddab9
<!-- Please describe your changes on the following line: --> These changes are the servo changes to allow the measurement of DOM objects with the ObjectPrivateVisitor API. Two new functions have been added MemoryReporter and get_size, which are passed as function pointers to two updated mozjs functions. Currently these changes rely on a branch version of mozjs, which has an [open pull request](https://github.com/servo/rust-mozjs/pull/409). --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #7084 (github issue number if applicable). <!-- Either: --> - [ ] There are tests for these changes OR - [x] These changes do not require tests because _____ <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> Source-Repo: https://github.com/servo/servo Source-Revision: 339146ae1566fc35e47ccc4fba1471a9123d039d --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 61df47854e0fd7725b25202c298646f52f5b4b4b
2632 lines
116 KiB
Rust
2632 lines
116 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! The script thread is the thread that owns the DOM in memory, runs JavaScript, and spawns parsing
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//! and layout threads. It's in charge of processing events for all same-origin pages in a frame
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//! tree, and manages the entire lifetime of pages in the frame tree from initial request to
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//! teardown.
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//!
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//! Page loads follow a two-step process. When a request for a new page load is received, the
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//! network request is initiated and the relevant data pertaining to the new page is stashed.
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//! While the non-blocking request is ongoing, the script thread is free to process further events,
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//! noting when they pertain to ongoing loads (such as resizes/viewport adjustments). When the
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//! initial response is received for an ongoing load, the second phase starts - the frame tree
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//! entry is created, along with the Window and Document objects, and the appropriate parser
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//! takes over the response body. Once parsing is complete, the document lifecycle for loading
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//! a page runs its course and the script thread returns to processing events in the main event
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//! loop.
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extern crate itertools;
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use bluetooth_traits::BluetoothRequest;
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use canvas_traits::webgl::WebGLPipeline;
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use devtools;
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use devtools_traits::{DevtoolScriptControlMsg, DevtoolsPageInfo};
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use devtools_traits::{ScriptToDevtoolsControlMsg, WorkerId};
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use devtools_traits::CSSError;
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use document_loader::DocumentLoader;
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use dom::bindings::cell::DomRefCell;
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use dom::bindings::codegen::Bindings::DocumentBinding::{DocumentMethods, DocumentReadyState};
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use dom::bindings::codegen::Bindings::EventBinding::EventInit;
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use dom::bindings::codegen::Bindings::TransitionEventBinding::TransitionEventInit;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
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use dom::bindings::conversions::{ConversionResult, FromJSValConvertible, StringificationBehavior};
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use dom::bindings::inheritance::Castable;
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use dom::bindings::num::Finite;
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use dom::bindings::reflector::DomObject;
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use dom::bindings::root::{Dom, DomRoot, MutNullableDom, RootCollection};
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use dom::bindings::root::{RootedReference, ThreadLocalStackRoots};
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use dom::bindings::str::DOMString;
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use dom::bindings::structuredclone::StructuredCloneData;
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use dom::bindings::trace::JSTraceable;
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use dom::bindings::utils::WRAP_CALLBACKS;
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use dom::customelementregistry::{CallbackReaction, CustomElementDefinition, CustomElementReactionStack};
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use dom::document::{Document, DocumentSource, FocusType, HasBrowsingContext, IsHTMLDocument, TouchEventResult};
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use dom::element::Element;
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use dom::event::{Event, EventBubbles, EventCancelable};
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use dom::globalscope::GlobalScope;
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use dom::htmlanchorelement::HTMLAnchorElement;
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use dom::htmliframeelement::{HTMLIFrameElement, NavigationType};
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use dom::mutationobserver::MutationObserver;
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use dom::node::{Node, NodeDamage, window_from_node, from_untrusted_node_address};
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use dom::performanceentry::PerformanceEntry;
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use dom::performancepainttiming::PerformancePaintTiming;
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use dom::serviceworker::TrustedServiceWorkerAddress;
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use dom::serviceworkerregistration::ServiceWorkerRegistration;
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use dom::servoparser::{ParserContext, ServoParser};
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use dom::transitionevent::TransitionEvent;
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use dom::uievent::UIEvent;
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use dom::window::{ReflowReason, Window};
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use dom::windowproxy::WindowProxy;
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use dom::worker::TrustedWorkerAddress;
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use dom::worklet::WorkletThreadPool;
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use dom::workletglobalscope::WorkletGlobalScopeInit;
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use euclid::{Point2D, Vector2D, Rect};
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use fetch::FetchCanceller;
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use hyper::header::{ContentType, HttpDate, Headers, LastModified};
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use hyper::header::ReferrerPolicy as ReferrerPolicyHeader;
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use hyper::mime::{Mime, SubLevel, TopLevel};
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use hyper_serde::Serde;
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use ipc_channel::ipc::{self, IpcSender};
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use ipc_channel::router::ROUTER;
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use js::glue::GetWindowProxyClass;
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use js::jsapi::{JSAutoCompartment, JSContext, JS_SetWrapObjectCallbacks};
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use js::jsapi::{JSTracer, SetWindowProxyClass};
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use js::jsval::UndefinedValue;
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use metrics::{MAX_TASK_NS, PaintTimeMetrics};
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use microtask::{MicrotaskQueue, Microtask};
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use msg::constellation_msg::{BrowsingContextId, PipelineId, PipelineNamespace, TopLevelBrowsingContextId};
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use net_traits::{FetchMetadata, FetchResponseListener, FetchResponseMsg};
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use net_traits::{Metadata, NetworkError, ReferrerPolicy, ResourceThreads};
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use net_traits::image_cache::{ImageCache, PendingImageResponse};
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use net_traits::request::{CredentialsMode, Destination, RedirectMode, RequestInit};
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use net_traits::storage_thread::StorageType;
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use profile_traits::mem::{self, OpaqueSender, ReportsChan};
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use profile_traits::time::{self, ProfilerCategory, profile};
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use script_layout_interface::message::{self, Msg, NewLayoutThreadInfo, ReflowGoal};
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use script_runtime::{CommonScriptMsg, ScriptChan, ScriptThreadEventCategory};
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use script_runtime::{ScriptPort, get_reports, new_rt_and_cx, Runtime};
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use script_traits::{CompositorEvent, ConstellationControlMsg};
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use script_traits::{DiscardBrowsingContext, DocumentActivity, EventResult};
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use script_traits::{InitialScriptState, JsEvalResult, LayoutMsg, LoadData};
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use script_traits::{MouseButton, MouseEventType, NewLayoutInfo};
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use script_traits::{ProgressiveWebMetricType, Painter, ScriptMsg, ScriptThreadFactory};
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use script_traits::{ScriptToConstellationChan, TimerEvent, TimerSchedulerMsg};
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use script_traits::{TimerSource, TouchEventType, TouchId, UntrustedNodeAddress};
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use script_traits::{UpdatePipelineIdReason, WindowSizeData, WindowSizeType};
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use script_traits::CompositorEvent::{KeyEvent, MouseButtonEvent, MouseMoveEvent, ResizeEvent, TouchEvent};
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use script_traits::webdriver_msg::WebDriverScriptCommand;
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use serviceworkerjob::{Job, JobQueue};
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use servo_atoms::Atom;
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use servo_config::opts;
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use servo_url::{ImmutableOrigin, MutableOrigin, ServoUrl};
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use std::cell::Cell;
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use std::collections::{hash_map, HashMap, HashSet};
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use std::default::Default;
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use std::ops::Deref;
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use std::option::Option;
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use std::ptr;
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use std::rc::Rc;
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use std::result::Result;
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use std::sync::Arc;
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use std::sync::mpsc::{Receiver, Select, Sender, channel};
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use std::thread;
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use style::thread_state::{self, ThreadState};
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use task_source::dom_manipulation::DOMManipulationTaskSource;
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use task_source::file_reading::FileReadingTaskSource;
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use task_source::history_traversal::HistoryTraversalTaskSource;
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use task_source::networking::NetworkingTaskSource;
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use task_source::performance_timeline::PerformanceTimelineTaskSource;
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use task_source::user_interaction::UserInteractionTaskSource;
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use time::{get_time, precise_time_ns, Tm};
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use url::Position;
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use url::percent_encoding::percent_decode;
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use webdriver_handlers;
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use webrender_api::DocumentId;
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use webvr_traits::{WebVREvent, WebVRMsg};
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pub type ImageCacheMsg = (PipelineId, PendingImageResponse);
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thread_local!(static SCRIPT_THREAD_ROOT: Cell<Option<*const ScriptThread>> = Cell::new(None));
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pub unsafe fn trace_thread(tr: *mut JSTracer) {
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SCRIPT_THREAD_ROOT.with(|root| {
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if let Some(script_thread) = root.get() {
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debug!("tracing fields of ScriptThread");
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(*script_thread).trace(tr);
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}
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});
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}
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/// A document load that is in the process of fetching the requested resource. Contains
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/// data that will need to be present when the document and frame tree entry are created,
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/// but is only easily available at initiation of the load and on a push basis (so some
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/// data will be updated according to future resize events, viewport changes, etc.)
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#[derive(JSTraceable)]
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struct InProgressLoad {
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/// The pipeline which requested this load.
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pipeline_id: PipelineId,
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/// The browsing context being loaded into.
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browsing_context_id: BrowsingContextId,
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/// The top level ancestor browsing context.
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top_level_browsing_context_id: TopLevelBrowsingContextId,
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/// The parent pipeline and frame type associated with this load, if any.
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parent_info: Option<PipelineId>,
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/// The current window size associated with this pipeline.
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window_size: Option<WindowSizeData>,
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/// Channel to the layout thread associated with this pipeline.
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layout_chan: Sender<message::Msg>,
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/// The activity level of the document (inactive, active or fully active).
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activity: DocumentActivity,
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/// Window is visible.
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is_visible: bool,
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/// The requested URL of the load.
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url: ServoUrl,
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/// The origin for the document
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origin: MutableOrigin,
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/// Timestamp reporting the time when the browser started this load.
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navigation_start: u64,
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/// High res timestamp reporting the time when the browser started this load.
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navigation_start_precise: u64,
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/// For cancelling the fetch
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canceller: FetchCanceller,
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}
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impl InProgressLoad {
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/// Create a new InProgressLoad object.
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fn new(id: PipelineId,
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browsing_context_id: BrowsingContextId,
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top_level_browsing_context_id: TopLevelBrowsingContextId,
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parent_info: Option<PipelineId>,
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layout_chan: Sender<message::Msg>,
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window_size: Option<WindowSizeData>,
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url: ServoUrl,
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origin: MutableOrigin) -> InProgressLoad {
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let current_time = get_time();
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let navigation_start_precise = precise_time_ns();
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layout_chan.send(message::Msg::SetNavigationStart(navigation_start_precise)).unwrap();
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InProgressLoad {
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pipeline_id: id,
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browsing_context_id: browsing_context_id,
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top_level_browsing_context_id: top_level_browsing_context_id,
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parent_info: parent_info,
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layout_chan: layout_chan,
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window_size: window_size,
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activity: DocumentActivity::FullyActive,
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is_visible: true,
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url: url,
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origin: origin,
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navigation_start: (current_time.sec * 1000 + current_time.nsec as i64 / 1000000) as u64,
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navigation_start_precise: navigation_start_precise,
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canceller: Default::default(),
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}
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}
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}
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#[derive(Debug)]
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enum MixedMessage {
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FromConstellation(ConstellationControlMsg),
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FromScript(MainThreadScriptMsg),
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FromDevtools(DevtoolScriptControlMsg),
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FromImageCache((PipelineId, PendingImageResponse)),
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FromScheduler(TimerEvent),
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}
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/// Messages used to control the script event loop.
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#[derive(Debug)]
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pub enum MainThreadScriptMsg {
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/// Common variants associated with the script messages
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Common(CommonScriptMsg),
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/// Notifies the script that a window associated with a particular pipeline
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/// should be closed (only dispatched to ScriptThread).
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ExitWindow(PipelineId),
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/// Begins a content-initiated load on the specified pipeline (only
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/// dispatched to ScriptThread). Allows for a replace bool to be passed. If true,
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/// the current entry will be replaced instead of a new entry being added.
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Navigate(PipelineId, LoadData, bool),
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/// Notifies the script thread that a new worklet has been loaded, and thus the page should be
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/// reflowed.
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WorkletLoaded(PipelineId),
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/// Notifies the script thread that a new paint worklet has been registered.
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RegisterPaintWorklet {
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pipeline_id: PipelineId,
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name: Atom,
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properties: Vec<Atom>,
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painter: Box<Painter>
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},
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/// Dispatches a job queue.
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DispatchJobQueue { scope_url: ServoUrl },
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}
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impl OpaqueSender<CommonScriptMsg> for Box<ScriptChan + Send> {
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fn send(&self, msg: CommonScriptMsg) {
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ScriptChan::send(&**self, msg).unwrap();
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}
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}
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impl ScriptPort for Receiver<CommonScriptMsg> {
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fn recv(&self) -> Result<CommonScriptMsg, ()> {
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self.recv().map_err(|_| ())
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}
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}
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impl ScriptPort for Receiver<MainThreadScriptMsg> {
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fn recv(&self) -> Result<CommonScriptMsg, ()> {
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match self.recv() {
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Ok(MainThreadScriptMsg::Common(script_msg)) => Ok(script_msg),
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Ok(_) => panic!("unexpected main thread event message!"),
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_ => Err(()),
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}
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}
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}
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impl ScriptPort for Receiver<(TrustedWorkerAddress, CommonScriptMsg)> {
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fn recv(&self) -> Result<CommonScriptMsg, ()> {
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self.recv().map(|(_, msg)| msg).map_err(|_| ())
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}
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}
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impl ScriptPort for Receiver<(TrustedWorkerAddress, MainThreadScriptMsg)> {
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fn recv(&self) -> Result<CommonScriptMsg, ()> {
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match self.recv().map(|(_, msg)| msg) {
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Ok(MainThreadScriptMsg::Common(script_msg)) => Ok(script_msg),
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Ok(_) => panic!("unexpected main thread event message!"),
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_ => Err(()),
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}
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}
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}
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impl ScriptPort for Receiver<(TrustedServiceWorkerAddress, CommonScriptMsg)> {
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fn recv(&self) -> Result<CommonScriptMsg, ()> {
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self.recv().map(|(_, msg)| msg).map_err(|_| ())
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}
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}
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/// Encapsulates internal communication of shared messages within the script thread.
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#[derive(JSTraceable)]
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pub struct SendableMainThreadScriptChan(pub Sender<CommonScriptMsg>);
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impl ScriptChan for SendableMainThreadScriptChan {
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fn send(&self, msg: CommonScriptMsg) -> Result<(), ()> {
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self.0.send(msg).map_err(|_| ())
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}
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fn clone(&self) -> Box<ScriptChan + Send> {
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Box::new(SendableMainThreadScriptChan((&self.0).clone()))
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}
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}
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/// Encapsulates internal communication of main thread messages within the script thread.
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#[derive(JSTraceable)]
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pub struct MainThreadScriptChan(pub Sender<MainThreadScriptMsg>);
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impl ScriptChan for MainThreadScriptChan {
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fn send(&self, msg: CommonScriptMsg) -> Result<(), ()> {
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self.0.send(MainThreadScriptMsg::Common(msg)).map_err(|_| ())
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}
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fn clone(&self) -> Box<ScriptChan + Send> {
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Box::new(MainThreadScriptChan((&self.0).clone()))
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}
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}
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impl OpaqueSender<CommonScriptMsg> for Sender<MainThreadScriptMsg> {
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fn send(&self, msg: CommonScriptMsg) {
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self.send(MainThreadScriptMsg::Common(msg)).unwrap()
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}
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}
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/// The set of all documents managed by this script thread.
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#[derive(JSTraceable)]
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#[must_root]
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pub struct Documents {
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map: HashMap<PipelineId, Dom<Document>>,
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}
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impl Documents {
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pub fn new() -> Documents {
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Documents {
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map: HashMap::new(),
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}
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}
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pub fn insert(&mut self, pipeline_id: PipelineId, doc: &Document) {
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self.map.insert(pipeline_id, Dom::from_ref(doc));
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}
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pub fn remove(&mut self, pipeline_id: PipelineId) -> Option<DomRoot<Document>> {
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self.map.remove(&pipeline_id).map(|ref doc| DomRoot::from_ref(&**doc))
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}
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pub fn is_empty(&self) -> bool {
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self.map.is_empty()
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}
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pub fn find_document(&self, pipeline_id: PipelineId) -> Option<DomRoot<Document>> {
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self.map.get(&pipeline_id).map(|doc| DomRoot::from_ref(&**doc))
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}
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pub fn len(&self) -> usize {
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self.map.len()
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}
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pub fn find_window(&self, pipeline_id: PipelineId) -> Option<DomRoot<Window>> {
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self.find_document(pipeline_id).map(|doc| DomRoot::from_ref(doc.window()))
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}
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pub fn find_global(&self, pipeline_id: PipelineId) -> Option<DomRoot<GlobalScope>> {
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self.find_window(pipeline_id).map(|window| DomRoot::from_ref(window.upcast()))
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}
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pub fn find_iframe(&self, pipeline_id: PipelineId, browsing_context_id: BrowsingContextId)
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-> Option<DomRoot<HTMLIFrameElement>>
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{
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self.find_document(pipeline_id).and_then(|doc| doc.find_iframe(browsing_context_id))
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}
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pub fn iter<'a>(&'a self) -> DocumentsIter<'a> {
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DocumentsIter {
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iter: self.map.iter(),
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}
|
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}
|
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}
|
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|
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#[allow(unrooted_must_root)]
|
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pub struct DocumentsIter<'a> {
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iter: hash_map::Iter<'a, PipelineId, Dom<Document>>,
|
||
}
|
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|
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impl<'a> Iterator for DocumentsIter<'a> {
|
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type Item = (PipelineId, DomRoot<Document>);
|
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|
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fn next(&mut self) -> Option<(PipelineId, DomRoot<Document>)> {
|
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self.iter.next().map(|(id, doc)| (*id, DomRoot::from_ref(&**doc)))
|
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}
|
||
}
|
||
|
||
#[derive(JSTraceable)]
|
||
// ScriptThread instances are rooted on creation, so this is okay
|
||
#[allow(unrooted_must_root)]
|
||
pub struct ScriptThread {
|
||
/// The documents for pipelines managed by this thread
|
||
documents: DomRefCell<Documents>,
|
||
/// The window proxies known by this thread
|
||
/// TODO: this map grows, but never shrinks. Issue #15258.
|
||
window_proxies: DomRefCell<HashMap<BrowsingContextId, Dom<WindowProxy>>>,
|
||
/// A list of data pertaining to loads that have not yet received a network response
|
||
incomplete_loads: DomRefCell<Vec<InProgressLoad>>,
|
||
/// A vector containing parser contexts which have not yet been fully processed
|
||
incomplete_parser_contexts: DomRefCell<Vec<(PipelineId, ParserContext)>>,
|
||
/// A map to store service worker registrations for a given origin
|
||
registration_map: DomRefCell<HashMap<ServoUrl, Dom<ServiceWorkerRegistration>>>,
|
||
/// A job queue for Service Workers keyed by their scope url
|
||
job_queue_map: Rc<JobQueue>,
|
||
/// Image cache for this script thread.
|
||
image_cache: Arc<ImageCache>,
|
||
/// A handle to the resource thread. This is an `Arc` to avoid running out of file descriptors if
|
||
/// there are many iframes.
|
||
resource_threads: ResourceThreads,
|
||
/// A handle to the bluetooth thread.
|
||
bluetooth_thread: IpcSender<BluetoothRequest>,
|
||
|
||
/// The port on which the script thread receives messages (load URL, exit, etc.)
|
||
port: Receiver<MainThreadScriptMsg>,
|
||
/// A channel to hand out to script thread-based entities that need to be able to enqueue
|
||
/// events in the event queue.
|
||
chan: MainThreadScriptChan,
|
||
|
||
dom_manipulation_task_sender: Sender<MainThreadScriptMsg>,
|
||
|
||
user_interaction_task_sender: Sender<MainThreadScriptMsg>,
|
||
|
||
networking_task_sender: Box<ScriptChan>,
|
||
|
||
history_traversal_task_source: HistoryTraversalTaskSource,
|
||
|
||
file_reading_task_sender: Box<ScriptChan>,
|
||
|
||
performance_timeline_task_sender: Box<ScriptChan>,
|
||
|
||
/// A channel to hand out to threads that need to respond to a message from the script thread.
|
||
control_chan: IpcSender<ConstellationControlMsg>,
|
||
|
||
/// The port on which the constellation and layout threads can communicate with the
|
||
/// script thread.
|
||
control_port: Receiver<ConstellationControlMsg>,
|
||
|
||
/// For communicating load url messages to the constellation
|
||
script_sender: IpcSender<(PipelineId, ScriptMsg)>,
|
||
|
||
/// A sender for new layout threads to communicate to the constellation.
|
||
layout_to_constellation_chan: IpcSender<LayoutMsg>,
|
||
|
||
/// The port on which we receive messages from the image cache
|
||
image_cache_port: Receiver<ImageCacheMsg>,
|
||
|
||
/// The channel on which the image cache can send messages to ourself.
|
||
image_cache_channel: Sender<ImageCacheMsg>,
|
||
/// For providing contact with the time profiler.
|
||
time_profiler_chan: time::ProfilerChan,
|
||
|
||
/// For providing contact with the memory profiler.
|
||
mem_profiler_chan: mem::ProfilerChan,
|
||
|
||
/// For providing instructions to an optional devtools server.
|
||
devtools_chan: Option<IpcSender<ScriptToDevtoolsControlMsg>>,
|
||
/// For receiving commands from an optional devtools server. Will be ignored if
|
||
/// no such server exists.
|
||
devtools_port: Receiver<DevtoolScriptControlMsg>,
|
||
devtools_sender: IpcSender<DevtoolScriptControlMsg>,
|
||
|
||
/// The JavaScript runtime.
|
||
js_runtime: Rc<Runtime>,
|
||
|
||
/// The topmost element over the mouse.
|
||
topmost_mouse_over_target: MutNullableDom<Element>,
|
||
|
||
/// List of pipelines that have been owned and closed by this script thread.
|
||
closed_pipelines: DomRefCell<HashSet<PipelineId>>,
|
||
|
||
scheduler_chan: IpcSender<TimerSchedulerMsg>,
|
||
timer_event_chan: Sender<TimerEvent>,
|
||
timer_event_port: Receiver<TimerEvent>,
|
||
|
||
content_process_shutdown_chan: IpcSender<()>,
|
||
|
||
/// <https://html.spec.whatwg.org/multipage/#microtask-queue>
|
||
microtask_queue: Rc<MicrotaskQueue>,
|
||
|
||
/// Microtask Queue for adding support for mutation observer microtasks
|
||
mutation_observer_compound_microtask_queued: Cell<bool>,
|
||
|
||
/// The unit of related similar-origin browsing contexts' list of MutationObserver objects
|
||
mutation_observers: DomRefCell<Vec<Dom<MutationObserver>>>,
|
||
|
||
/// A handle to the WebGL thread
|
||
webgl_chan: Option<WebGLPipeline>,
|
||
|
||
/// A handle to the webvr thread, if available
|
||
webvr_chan: Option<IpcSender<WebVRMsg>>,
|
||
|
||
/// The worklet thread pool
|
||
worklet_thread_pool: DomRefCell<Option<Rc<WorkletThreadPool>>>,
|
||
|
||
/// A list of pipelines containing documents that finished loading all their blocking
|
||
/// resources during a turn of the event loop.
|
||
docs_with_no_blocking_loads: DomRefCell<HashSet<Dom<Document>>>,
|
||
|
||
/// A list of nodes with in-progress CSS transitions, which roots them for the duration
|
||
/// of the transition.
|
||
transitioning_nodes: DomRefCell<Vec<Dom<Node>>>,
|
||
|
||
/// <https://html.spec.whatwg.org/multipage/#custom-element-reactions-stack>
|
||
custom_element_reaction_stack: CustomElementReactionStack,
|
||
|
||
/// The Webrender Document ID associated with this thread.
|
||
webrender_document: DocumentId,
|
||
}
|
||
|
||
/// In the event of thread panic, all data on the stack runs its destructor. However, there
|
||
/// are no reachable, owning pointers to the DOM memory, so it never gets freed by default
|
||
/// when the script thread fails. The ScriptMemoryFailsafe uses the destructor bomb pattern
|
||
/// to forcibly tear down the JS compartments for pages associated with the failing ScriptThread.
|
||
struct ScriptMemoryFailsafe<'a> {
|
||
owner: Option<&'a ScriptThread>,
|
||
}
|
||
|
||
impl<'a> ScriptMemoryFailsafe<'a> {
|
||
fn neuter(&mut self) {
|
||
self.owner = None;
|
||
}
|
||
|
||
fn new(owner: &'a ScriptThread) -> ScriptMemoryFailsafe<'a> {
|
||
ScriptMemoryFailsafe {
|
||
owner: Some(owner),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl<'a> Drop for ScriptMemoryFailsafe<'a> {
|
||
#[allow(unrooted_must_root)]
|
||
fn drop(&mut self) {
|
||
if let Some(owner) = self.owner {
|
||
for (_, document) in owner.documents.borrow().iter() {
|
||
document.window().clear_js_runtime_for_script_deallocation();
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
impl ScriptThreadFactory for ScriptThread {
|
||
type Message = message::Msg;
|
||
|
||
fn create(state: InitialScriptState,
|
||
load_data: LoadData)
|
||
-> (Sender<message::Msg>, Receiver<message::Msg>) {
|
||
let (script_chan, script_port) = channel();
|
||
|
||
let (sender, receiver) = channel();
|
||
let layout_chan = sender.clone();
|
||
thread::Builder::new().name(format!("ScriptThread {:?}", state.id)).spawn(move || {
|
||
thread_state::initialize(ThreadState::SCRIPT);
|
||
PipelineNamespace::install(state.pipeline_namespace_id);
|
||
TopLevelBrowsingContextId::install(state.top_level_browsing_context_id);
|
||
let roots = RootCollection::new();
|
||
let _stack_roots = ThreadLocalStackRoots::new(&roots);
|
||
let id = state.id;
|
||
let browsing_context_id = state.browsing_context_id;
|
||
let top_level_browsing_context_id = state.top_level_browsing_context_id;
|
||
let parent_info = state.parent_info;
|
||
let mem_profiler_chan = state.mem_profiler_chan.clone();
|
||
let window_size = state.window_size;
|
||
let script_thread = ScriptThread::new(state,
|
||
script_port,
|
||
script_chan.clone());
|
||
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
root.set(Some(&script_thread as *const _));
|
||
});
|
||
|
||
let mut failsafe = ScriptMemoryFailsafe::new(&script_thread);
|
||
|
||
let origin = MutableOrigin::new(load_data.url.origin());
|
||
let new_load = InProgressLoad::new(id, browsing_context_id, top_level_browsing_context_id, parent_info,
|
||
layout_chan, window_size, load_data.url.clone(), origin);
|
||
script_thread.pre_page_load(new_load, load_data);
|
||
|
||
let reporter_name = format!("script-reporter-{}", id);
|
||
mem_profiler_chan.run_with_memory_reporting(|| {
|
||
script_thread.start();
|
||
let _ = script_thread.content_process_shutdown_chan.send(());
|
||
}, reporter_name, script_chan, CommonScriptMsg::CollectReports);
|
||
|
||
// This must always be the very last operation performed before the thread completes
|
||
failsafe.neuter();
|
||
}).expect("Thread spawning failed");
|
||
|
||
(sender, receiver)
|
||
}
|
||
}
|
||
|
||
impl ScriptThread {
|
||
pub unsafe fn note_newly_transitioning_nodes(nodes: Vec<UntrustedNodeAddress>) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = &*root.get().unwrap();
|
||
let js_runtime = script_thread.js_runtime.rt();
|
||
let new_nodes = nodes
|
||
.into_iter()
|
||
.map(|n| Dom::from_ref(&*from_untrusted_node_address(js_runtime, n)));
|
||
script_thread.transitioning_nodes.borrow_mut().extend(new_nodes);
|
||
})
|
||
}
|
||
|
||
pub fn set_mutation_observer_compound_microtask_queued(value: bool) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
script_thread.mutation_observer_compound_microtask_queued.set(value);
|
||
})
|
||
}
|
||
|
||
pub fn is_mutation_observer_compound_microtask_queued() -> bool {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
return script_thread.mutation_observer_compound_microtask_queued.get();
|
||
})
|
||
}
|
||
|
||
pub fn add_mutation_observer(observer: &MutationObserver) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
script_thread.mutation_observers
|
||
.borrow_mut()
|
||
.push(Dom::from_ref(observer));
|
||
})
|
||
}
|
||
|
||
pub fn get_mutation_observers() -> Vec<DomRoot<MutationObserver>> {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
script_thread.mutation_observers.borrow().iter().map(|o| DomRoot::from_ref(&**o)).collect()
|
||
})
|
||
}
|
||
|
||
pub fn mark_document_with_no_blocked_loads(doc: &Document) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
script_thread.docs_with_no_blocking_loads
|
||
.borrow_mut()
|
||
.insert(Dom::from_ref(doc));
|
||
})
|
||
}
|
||
|
||
pub fn invoke_perform_a_microtask_checkpoint() {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
script_thread.perform_a_microtask_checkpoint()
|
||
})
|
||
}
|
||
|
||
pub fn page_headers_available(id: &PipelineId, metadata: Option<Metadata>)
|
||
-> Option<DomRoot<ServoParser>> {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
script_thread.handle_page_headers_available(id, metadata)
|
||
})
|
||
}
|
||
|
||
#[allow(unrooted_must_root)]
|
||
pub fn schedule_job(job: Job) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
let job_queue = &*script_thread.job_queue_map;
|
||
job_queue.schedule_job(job, &script_thread);
|
||
});
|
||
}
|
||
|
||
pub fn process_event(msg: CommonScriptMsg) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
if let Some(script_thread) = root.get() {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.handle_msg_from_script(MainThreadScriptMsg::Common(msg));
|
||
}
|
||
});
|
||
}
|
||
|
||
// https://html.spec.whatwg.org/multipage/#await-a-stable-state
|
||
pub fn await_stable_state(task: Microtask) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
if let Some(script_thread) = root.get() {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.microtask_queue.enqueue(task);
|
||
}
|
||
});
|
||
}
|
||
|
||
pub fn process_attach_layout(new_layout_info: NewLayoutInfo, origin: MutableOrigin) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
if let Some(script_thread) = root.get() {
|
||
let script_thread = unsafe { &*script_thread };
|
||
let pipeline_id = Some(new_layout_info.new_pipeline_id);
|
||
script_thread.profile_event(ScriptThreadEventCategory::AttachLayout, pipeline_id, || {
|
||
script_thread.handle_new_layout(new_layout_info, origin);
|
||
})
|
||
}
|
||
});
|
||
}
|
||
|
||
pub fn find_document(id: PipelineId) -> Option<DomRoot<Document>> {
|
||
SCRIPT_THREAD_ROOT.with(|root| root.get().and_then(|script_thread| {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.documents.borrow().find_document(id)
|
||
}))
|
||
}
|
||
|
||
pub fn find_window_proxy(id: BrowsingContextId) -> Option<DomRoot<WindowProxy>> {
|
||
SCRIPT_THREAD_ROOT.with(|root| root.get().and_then(|script_thread| {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.window_proxies.borrow().get(&id)
|
||
.map(|context| DomRoot::from_ref(&**context))
|
||
}))
|
||
}
|
||
|
||
pub fn worklet_thread_pool() -> Rc<WorkletThreadPool> {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
script_thread.worklet_thread_pool.borrow_mut().get_or_insert_with(|| {
|
||
let init = WorkletGlobalScopeInit {
|
||
to_script_thread_sender: script_thread.chan.0.clone(),
|
||
resource_threads: script_thread.resource_threads.clone(),
|
||
mem_profiler_chan: script_thread.mem_profiler_chan.clone(),
|
||
time_profiler_chan: script_thread.time_profiler_chan.clone(),
|
||
devtools_chan: script_thread.devtools_chan.clone(),
|
||
to_constellation_sender: script_thread.script_sender.clone(),
|
||
scheduler_chan: script_thread.scheduler_chan.clone(),
|
||
image_cache: script_thread.image_cache.clone(),
|
||
};
|
||
Rc::new(WorkletThreadPool::spawn(init))
|
||
}).clone()
|
||
})
|
||
}
|
||
|
||
fn handle_register_paint_worklet(
|
||
&self,
|
||
pipeline_id: PipelineId,
|
||
name: Atom,
|
||
properties: Vec<Atom>,
|
||
painter: Box<Painter>)
|
||
{
|
||
let window = self.documents.borrow().find_window(pipeline_id);
|
||
let window = match window {
|
||
Some(window) => window,
|
||
None => return warn!("Paint worklet registered after pipeline {} closed.", pipeline_id),
|
||
};
|
||
let _ = window.layout_chan().send(
|
||
Msg::RegisterPaint(name, properties, painter),
|
||
);
|
||
}
|
||
|
||
pub fn push_new_element_queue() {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
if let Some(script_thread) = root.get() {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.custom_element_reaction_stack.push_new_element_queue();
|
||
}
|
||
})
|
||
}
|
||
|
||
pub fn pop_current_element_queue() {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
if let Some(script_thread) = root.get() {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.custom_element_reaction_stack.pop_current_element_queue();
|
||
}
|
||
})
|
||
}
|
||
|
||
pub fn enqueue_callback_reaction(element: &Element,
|
||
reaction: CallbackReaction,
|
||
definition: Option<Rc<CustomElementDefinition>>) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
if let Some(script_thread) = root.get() {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.custom_element_reaction_stack.enqueue_callback_reaction(element, reaction, definition);
|
||
}
|
||
})
|
||
}
|
||
|
||
pub fn enqueue_upgrade_reaction(element: &Element, definition: Rc<CustomElementDefinition>) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
if let Some(script_thread) = root.get() {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.custom_element_reaction_stack.enqueue_upgrade_reaction(element, definition);
|
||
}
|
||
})
|
||
}
|
||
|
||
pub fn invoke_backup_element_queue() {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
if let Some(script_thread) = root.get() {
|
||
let script_thread = unsafe { &*script_thread };
|
||
script_thread.custom_element_reaction_stack.invoke_backup_element_queue();
|
||
}
|
||
})
|
||
}
|
||
|
||
/// Creates a new script thread.
|
||
pub fn new(state: InitialScriptState,
|
||
port: Receiver<MainThreadScriptMsg>,
|
||
chan: Sender<MainThreadScriptMsg>)
|
||
-> ScriptThread {
|
||
let runtime = unsafe { new_rt_and_cx() };
|
||
|
||
unsafe {
|
||
JS_SetWrapObjectCallbacks(runtime.rt(),
|
||
&WRAP_CALLBACKS);
|
||
SetWindowProxyClass(runtime.rt(), GetWindowProxyClass());
|
||
}
|
||
|
||
// Ask the router to proxy IPC messages from the devtools to us.
|
||
let (ipc_devtools_sender, ipc_devtools_receiver) = ipc::channel().unwrap();
|
||
let devtools_port = ROUTER.route_ipc_receiver_to_new_mpsc_receiver(ipc_devtools_receiver);
|
||
|
||
let (timer_event_chan, timer_event_port) = channel();
|
||
|
||
// Ask the router to proxy IPC messages from the control port to us.
|
||
let control_port = ROUTER.route_ipc_receiver_to_new_mpsc_receiver(state.control_port);
|
||
|
||
let boxed_script_sender = Box::new(MainThreadScriptChan(chan.clone()));
|
||
|
||
let (image_cache_channel, image_cache_port) = channel();
|
||
|
||
ScriptThread {
|
||
documents: DomRefCell::new(Documents::new()),
|
||
window_proxies: DomRefCell::new(HashMap::new()),
|
||
incomplete_loads: DomRefCell::new(vec!()),
|
||
incomplete_parser_contexts: DomRefCell::new(vec!()),
|
||
registration_map: DomRefCell::new(HashMap::new()),
|
||
job_queue_map: Rc::new(JobQueue::new()),
|
||
|
||
image_cache: state.image_cache.clone(),
|
||
image_cache_channel: image_cache_channel,
|
||
image_cache_port: image_cache_port,
|
||
|
||
resource_threads: state.resource_threads,
|
||
bluetooth_thread: state.bluetooth_thread,
|
||
|
||
port: port,
|
||
|
||
chan: MainThreadScriptChan(chan.clone()),
|
||
dom_manipulation_task_sender: chan.clone(),
|
||
user_interaction_task_sender: chan.clone(),
|
||
networking_task_sender: boxed_script_sender.clone(),
|
||
file_reading_task_sender: boxed_script_sender.clone(),
|
||
performance_timeline_task_sender: boxed_script_sender.clone(),
|
||
|
||
history_traversal_task_source: HistoryTraversalTaskSource(chan),
|
||
|
||
control_chan: state.control_chan,
|
||
control_port: control_port,
|
||
script_sender: state.script_to_constellation_chan.sender.clone(),
|
||
time_profiler_chan: state.time_profiler_chan.clone(),
|
||
mem_profiler_chan: state.mem_profiler_chan,
|
||
|
||
devtools_chan: state.devtools_chan,
|
||
devtools_port: devtools_port,
|
||
devtools_sender: ipc_devtools_sender,
|
||
|
||
js_runtime: Rc::new(runtime),
|
||
topmost_mouse_over_target: MutNullableDom::new(Default::default()),
|
||
closed_pipelines: DomRefCell::new(HashSet::new()),
|
||
|
||
scheduler_chan: state.scheduler_chan,
|
||
timer_event_chan: timer_event_chan,
|
||
timer_event_port: timer_event_port,
|
||
|
||
content_process_shutdown_chan: state.content_process_shutdown_chan,
|
||
|
||
microtask_queue: Default::default(),
|
||
|
||
mutation_observer_compound_microtask_queued: Default::default(),
|
||
|
||
mutation_observers: Default::default(),
|
||
|
||
layout_to_constellation_chan: state.layout_to_constellation_chan,
|
||
|
||
webgl_chan: state.webgl_chan,
|
||
webvr_chan: state.webvr_chan,
|
||
|
||
worklet_thread_pool: Default::default(),
|
||
|
||
docs_with_no_blocking_loads: Default::default(),
|
||
|
||
transitioning_nodes: Default::default(),
|
||
|
||
custom_element_reaction_stack: CustomElementReactionStack::new(),
|
||
|
||
webrender_document: state.webrender_document,
|
||
}
|
||
}
|
||
|
||
pub fn get_cx(&self) -> *mut JSContext {
|
||
self.js_runtime.cx()
|
||
}
|
||
|
||
/// Starts the script thread. After calling this method, the script thread will loop receiving
|
||
/// messages on its port.
|
||
pub fn start(&self) {
|
||
debug!("Starting script thread.");
|
||
while self.handle_msgs() {
|
||
// Go on...
|
||
debug!("Running script thread.");
|
||
}
|
||
debug!("Stopped script thread.");
|
||
}
|
||
|
||
/// Handle incoming control messages.
|
||
fn handle_msgs(&self) -> bool {
|
||
use self::MixedMessage::{FromConstellation, FromDevtools, FromImageCache};
|
||
use self::MixedMessage::{FromScheduler, FromScript};
|
||
|
||
// Handle pending resize events.
|
||
// Gather them first to avoid a double mut borrow on self.
|
||
let mut resizes = vec!();
|
||
|
||
for (id, document) in self.documents.borrow().iter() {
|
||
// Only process a resize if layout is idle.
|
||
if let Some((size, size_type)) = document.window().steal_resize_event() {
|
||
resizes.push((id, size, size_type));
|
||
}
|
||
}
|
||
|
||
for (id, size, size_type) in resizes {
|
||
self.handle_event(id, ResizeEvent(size, size_type));
|
||
}
|
||
|
||
// Store new resizes, and gather all other events.
|
||
let mut sequential = vec![];
|
||
|
||
// Receive at least one message so we don't spinloop.
|
||
debug!("Waiting for event.");
|
||
let mut event = {
|
||
let sel = Select::new();
|
||
let mut script_port = sel.handle(&self.port);
|
||
let mut control_port = sel.handle(&self.control_port);
|
||
let mut timer_event_port = sel.handle(&self.timer_event_port);
|
||
let mut devtools_port = sel.handle(&self.devtools_port);
|
||
let mut image_cache_port = sel.handle(&self.image_cache_port);
|
||
unsafe {
|
||
script_port.add();
|
||
control_port.add();
|
||
timer_event_port.add();
|
||
if self.devtools_chan.is_some() {
|
||
devtools_port.add();
|
||
}
|
||
image_cache_port.add();
|
||
}
|
||
let ret = sel.wait();
|
||
if ret == script_port.id() {
|
||
FromScript(self.port.recv().unwrap())
|
||
} else if ret == control_port.id() {
|
||
FromConstellation(self.control_port.recv().unwrap())
|
||
} else if ret == timer_event_port.id() {
|
||
FromScheduler(self.timer_event_port.recv().unwrap())
|
||
} else if ret == devtools_port.id() {
|
||
FromDevtools(self.devtools_port.recv().unwrap())
|
||
} else if ret == image_cache_port.id() {
|
||
FromImageCache(self.image_cache_port.recv().unwrap())
|
||
} else {
|
||
panic!("unexpected select result")
|
||
}
|
||
};
|
||
debug!("Got event.");
|
||
|
||
// Squash any pending resize, reflow, animation tick, and mouse-move events in the queue.
|
||
let mut mouse_move_event_index = None;
|
||
let mut animation_ticks = HashSet::new();
|
||
loop {
|
||
// https://html.spec.whatwg.org/multipage/#event-loop-processing-model step 7
|
||
match event {
|
||
// This has to be handled before the ResizeMsg below,
|
||
// otherwise the page may not have been added to the
|
||
// child list yet, causing the find() to fail.
|
||
FromConstellation(ConstellationControlMsg::AttachLayout(
|
||
new_layout_info)) => {
|
||
let pipeline_id = new_layout_info.new_pipeline_id;
|
||
self.profile_event(ScriptThreadEventCategory::AttachLayout, Some(pipeline_id), || {
|
||
// If this is an about:blank load, it must share the creator's origin.
|
||
// This must match the logic in the constellation when creating a new pipeline
|
||
let origin = if new_layout_info.load_data.url.as_str() != "about:blank" {
|
||
MutableOrigin::new(new_layout_info.load_data.url.origin())
|
||
} else if let Some(parent) = new_layout_info.parent_info
|
||
.and_then(|pipeline_id| self.documents.borrow()
|
||
.find_document(pipeline_id)) {
|
||
parent.origin().clone()
|
||
} else if let Some(creator) = new_layout_info.load_data.creator_pipeline_id
|
||
.and_then(|pipeline_id| self.documents.borrow()
|
||
.find_document(pipeline_id)) {
|
||
creator.origin().clone()
|
||
} else {
|
||
MutableOrigin::new(ImmutableOrigin::new_opaque())
|
||
};
|
||
|
||
self.handle_new_layout(new_layout_info, origin);
|
||
})
|
||
}
|
||
FromConstellation(ConstellationControlMsg::Resize(id, size, size_type)) => {
|
||
// step 7.7
|
||
self.profile_event(ScriptThreadEventCategory::Resize, Some(id), || {
|
||
self.handle_resize(id, size, size_type);
|
||
})
|
||
}
|
||
FromConstellation(ConstellationControlMsg::Viewport(id, rect)) => {
|
||
self.profile_event(ScriptThreadEventCategory::SetViewport, Some(id), || {
|
||
self.handle_viewport(id, rect);
|
||
})
|
||
}
|
||
FromConstellation(ConstellationControlMsg::SetScrollState(id, scroll_state)) => {
|
||
self.profile_event(ScriptThreadEventCategory::SetScrollState, Some(id), || {
|
||
self.handle_set_scroll_state(id, &scroll_state);
|
||
})
|
||
}
|
||
FromConstellation(ConstellationControlMsg::TickAllAnimations(
|
||
pipeline_id)) => {
|
||
// step 7.8
|
||
if !animation_ticks.contains(&pipeline_id) {
|
||
animation_ticks.insert(pipeline_id);
|
||
sequential.push(event);
|
||
}
|
||
}
|
||
FromConstellation(ConstellationControlMsg::SendEvent(
|
||
_,
|
||
MouseMoveEvent(..))) => {
|
||
match mouse_move_event_index {
|
||
None => {
|
||
mouse_move_event_index = Some(sequential.len());
|
||
sequential.push(event);
|
||
}
|
||
Some(index) => {
|
||
sequential[index] = event
|
||
}
|
||
}
|
||
}
|
||
_ => {
|
||
sequential.push(event);
|
||
}
|
||
}
|
||
|
||
// If any of our input sources has an event pending, we'll perform another iteration
|
||
// and check for more resize events. If there are no events pending, we'll move
|
||
// on and execute the sequential non-resize events we've seen.
|
||
match self.control_port.try_recv() {
|
||
Err(_) => match self.port.try_recv() {
|
||
Err(_) => match self.timer_event_port.try_recv() {
|
||
Err(_) => match self.devtools_port.try_recv() {
|
||
Err(_) => match self.image_cache_port.try_recv() {
|
||
Err(_) => break,
|
||
Ok(ev) => event = FromImageCache(ev),
|
||
},
|
||
Ok(ev) => event = FromDevtools(ev),
|
||
},
|
||
Ok(ev) => event = FromScheduler(ev),
|
||
},
|
||
Ok(ev) => event = FromScript(ev),
|
||
},
|
||
Ok(ev) => event = FromConstellation(ev),
|
||
}
|
||
}
|
||
|
||
// Process the gathered events.
|
||
debug!("Processing events.");
|
||
for msg in sequential {
|
||
debug!("Processing event {:?}.", msg);
|
||
|
||
let category = self.categorize_msg(&msg);
|
||
let pipeline_id = self.message_to_pipeline(&msg);
|
||
|
||
let result = self.profile_event(category, pipeline_id, move || {
|
||
match msg {
|
||
FromConstellation(ConstellationControlMsg::ExitScriptThread) => {
|
||
self.handle_exit_script_thread_msg();
|
||
return Some(false);
|
||
},
|
||
FromConstellation(inner_msg) => self.handle_msg_from_constellation(inner_msg),
|
||
FromScript(inner_msg) => self.handle_msg_from_script(inner_msg),
|
||
FromScheduler(inner_msg) => self.handle_timer_event(inner_msg),
|
||
FromDevtools(inner_msg) => self.handle_msg_from_devtools(inner_msg),
|
||
FromImageCache(inner_msg) => self.handle_msg_from_image_cache(inner_msg),
|
||
}
|
||
|
||
None
|
||
});
|
||
|
||
// https://html.spec.whatwg.org/multipage/#event-loop-processing-model step 6
|
||
self.perform_a_microtask_checkpoint();
|
||
|
||
if let Some(retval) = result {
|
||
return retval
|
||
}
|
||
}
|
||
|
||
{
|
||
// https://html.spec.whatwg.org/multipage/#the-end step 6
|
||
let mut docs = self.docs_with_no_blocking_loads.borrow_mut();
|
||
for document in docs.iter() {
|
||
document.maybe_queue_document_completion();
|
||
}
|
||
docs.clear();
|
||
}
|
||
|
||
// https://html.spec.whatwg.org/multipage/#event-loop-processing-model step 7.12
|
||
|
||
// Issue batched reflows on any pages that require it (e.g. if images loaded)
|
||
// TODO(gw): In the future we could probably batch other types of reflows
|
||
// into this loop too, but for now it's only images.
|
||
debug!("Issuing batched reflows.");
|
||
for (_, document) in self.documents.borrow().iter() {
|
||
let window = document.window();
|
||
let pending_reflows = window.get_pending_reflow_count();
|
||
if pending_reflows > 0 {
|
||
window.reflow(ReflowGoal::Full, ReflowReason::ImageLoaded);
|
||
} else {
|
||
// Reflow currently happens when explicitly invoked by code that
|
||
// knows the document could have been modified. This should really
|
||
// be driven by the compositor on an as-needed basis instead, to
|
||
// minimize unnecessary work.
|
||
window.reflow(ReflowGoal::Full, ReflowReason::MissingExplicitReflow);
|
||
}
|
||
}
|
||
|
||
true
|
||
}
|
||
|
||
fn categorize_msg(&self, msg: &MixedMessage) -> ScriptThreadEventCategory {
|
||
match *msg {
|
||
MixedMessage::FromConstellation(ref inner_msg) => {
|
||
match *inner_msg {
|
||
ConstellationControlMsg::SendEvent(_, _) =>
|
||
ScriptThreadEventCategory::DomEvent,
|
||
_ => ScriptThreadEventCategory::ConstellationMsg
|
||
}
|
||
},
|
||
// TODO https://github.com/servo/servo/issues/18998
|
||
MixedMessage::FromDevtools(_) => ScriptThreadEventCategory::DevtoolsMsg,
|
||
MixedMessage::FromImageCache(_) => ScriptThreadEventCategory::ImageCacheMsg,
|
||
MixedMessage::FromScript(ref inner_msg) => {
|
||
match *inner_msg {
|
||
MainThreadScriptMsg::Common(CommonScriptMsg::Task(category, ..)) => {
|
||
category
|
||
},
|
||
MainThreadScriptMsg::RegisterPaintWorklet { .. } => {
|
||
ScriptThreadEventCategory::WorkletEvent
|
||
},
|
||
_ => ScriptThreadEventCategory::ScriptEvent,
|
||
}
|
||
},
|
||
MixedMessage::FromScheduler(_) => ScriptThreadEventCategory::TimerEvent
|
||
}
|
||
}
|
||
|
||
fn message_to_pipeline(&self, msg: &MixedMessage) -> Option<PipelineId> {
|
||
use script_traits::ConstellationControlMsg::*;
|
||
match *msg {
|
||
MixedMessage::FromConstellation(ref inner_msg) => {
|
||
match *inner_msg {
|
||
NavigationResponse(id, _) => Some(id),
|
||
AttachLayout(ref new_layout_info) => Some(new_layout_info.new_pipeline_id),
|
||
Resize(id, ..) => Some(id),
|
||
ResizeInactive(id, ..) => Some(id),
|
||
ExitPipeline(id, ..) => Some(id),
|
||
ExitScriptThread => None,
|
||
SendEvent(id, ..) => Some(id),
|
||
Viewport(id, ..) => Some(id),
|
||
SetScrollState(id, ..) => Some(id),
|
||
GetTitle(id) => Some(id),
|
||
SetDocumentActivity(id, ..) => Some(id),
|
||
ChangeFrameVisibilityStatus(id, ..) => Some(id),
|
||
NotifyVisibilityChange(id, ..) => Some(id),
|
||
Navigate(id, ..) => Some(id),
|
||
PostMessage(id, ..) => Some(id),
|
||
UpdatePipelineId(_, _, id, _) => Some(id),
|
||
FocusIFrame(id, ..) => Some(id),
|
||
WebDriverScriptCommand(id, ..) => Some(id),
|
||
TickAllAnimations(id) => Some(id),
|
||
// FIXME https://github.com/servo/servo/issues/15079
|
||
TransitionEnd(..) => None,
|
||
WebFontLoaded(id) => Some(id),
|
||
DispatchIFrameLoadEvent { target: _, parent: id, child: _ } => Some(id),
|
||
DispatchStorageEvent(id, ..) => Some(id),
|
||
ReportCSSError(id, ..) => Some(id),
|
||
Reload(id, ..) => Some(id),
|
||
WebVREvents(id, ..) => Some(id),
|
||
PaintMetric(..) => None,
|
||
}
|
||
},
|
||
MixedMessage::FromDevtools(_) => None,
|
||
MixedMessage::FromScript(ref inner_msg) => {
|
||
match *inner_msg {
|
||
MainThreadScriptMsg::Common(CommonScriptMsg::Task(_, _, pipeline_id)) =>
|
||
pipeline_id,
|
||
MainThreadScriptMsg::Common(CommonScriptMsg::CollectReports(_)) => None,
|
||
MainThreadScriptMsg::ExitWindow(pipeline_id) => Some(pipeline_id),
|
||
MainThreadScriptMsg::Navigate(pipeline_id, ..) => Some(pipeline_id),
|
||
MainThreadScriptMsg::WorkletLoaded(pipeline_id) => Some(pipeline_id),
|
||
MainThreadScriptMsg::RegisterPaintWorklet { pipeline_id, .. } => Some(pipeline_id),
|
||
MainThreadScriptMsg::DispatchJobQueue { .. } => None,
|
||
}
|
||
},
|
||
MixedMessage::FromImageCache((pipeline_id, _)) => Some(pipeline_id),
|
||
MixedMessage::FromScheduler(ref timer_event) => {
|
||
let TimerEvent(source, _) = *timer_event;
|
||
match source {
|
||
TimerSource::FromWindow(pipeline_id) => Some(pipeline_id),
|
||
_ => None
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
fn profile_event<F, R>(&self, category: ScriptThreadEventCategory, pipeline_id: Option<PipelineId>, f: F) -> R
|
||
where F: FnOnce() -> R {
|
||
let start = precise_time_ns();
|
||
let value = if opts::get().profile_script_events {
|
||
let profiler_cat = match category {
|
||
ScriptThreadEventCategory::AttachLayout => ProfilerCategory::ScriptAttachLayout,
|
||
ScriptThreadEventCategory::ConstellationMsg => ProfilerCategory::ScriptConstellationMsg,
|
||
ScriptThreadEventCategory::DevtoolsMsg => ProfilerCategory::ScriptDevtoolsMsg,
|
||
ScriptThreadEventCategory::DocumentEvent => ProfilerCategory::ScriptDocumentEvent,
|
||
ScriptThreadEventCategory::DomEvent => ProfilerCategory::ScriptDomEvent,
|
||
ScriptThreadEventCategory::FileRead => ProfilerCategory::ScriptFileRead,
|
||
ScriptThreadEventCategory::FormPlannedNavigation => ProfilerCategory::ScriptPlannedNavigation,
|
||
ScriptThreadEventCategory::ImageCacheMsg => ProfilerCategory::ScriptImageCacheMsg,
|
||
ScriptThreadEventCategory::InputEvent => ProfilerCategory::ScriptInputEvent,
|
||
ScriptThreadEventCategory::NetworkEvent => ProfilerCategory::ScriptNetworkEvent,
|
||
ScriptThreadEventCategory::Resize => ProfilerCategory::ScriptResize,
|
||
ScriptThreadEventCategory::ScriptEvent => ProfilerCategory::ScriptEvent,
|
||
ScriptThreadEventCategory::SetScrollState => {
|
||
ProfilerCategory::ScriptSetScrollState
|
||
}
|
||
ScriptThreadEventCategory::UpdateReplacedElement => {
|
||
ProfilerCategory::ScriptUpdateReplacedElement
|
||
}
|
||
ScriptThreadEventCategory::StylesheetLoad => ProfilerCategory::ScriptStylesheetLoad,
|
||
ScriptThreadEventCategory::SetViewport => ProfilerCategory::ScriptSetViewport,
|
||
ScriptThreadEventCategory::TimerEvent => ProfilerCategory::ScriptTimerEvent,
|
||
ScriptThreadEventCategory::WebSocketEvent => ProfilerCategory::ScriptWebSocketEvent,
|
||
ScriptThreadEventCategory::WebVREvent => ProfilerCategory::ScriptWebVREvent,
|
||
ScriptThreadEventCategory::WorkerEvent => ProfilerCategory::ScriptWorkerEvent,
|
||
ScriptThreadEventCategory::WorkletEvent => ProfilerCategory::ScriptWorkletEvent,
|
||
ScriptThreadEventCategory::ServiceWorkerEvent => ProfilerCategory::ScriptServiceWorkerEvent,
|
||
ScriptThreadEventCategory::EnterFullscreen => ProfilerCategory::ScriptEnterFullscreen,
|
||
ScriptThreadEventCategory::ExitFullscreen => ProfilerCategory::ScriptExitFullscreen,
|
||
ScriptThreadEventCategory::PerformanceTimelineTask => ProfilerCategory::ScriptPerformanceEvent,
|
||
};
|
||
profile(profiler_cat, None, self.time_profiler_chan.clone(), f)
|
||
} else {
|
||
f()
|
||
};
|
||
let end = precise_time_ns();
|
||
for (doc_id, doc) in self.documents.borrow().iter() {
|
||
if let Some(pipeline_id) = pipeline_id {
|
||
if pipeline_id == doc_id && end - start > MAX_TASK_NS {
|
||
if opts::get().print_pwm {
|
||
println!("Task took longer than max allowed ({:?}) {:?}", category, end - start);
|
||
}
|
||
doc.start_tti();
|
||
}
|
||
}
|
||
doc.record_tti_if_necessary();
|
||
}
|
||
value
|
||
}
|
||
|
||
fn handle_msg_from_constellation(&self, msg: ConstellationControlMsg) {
|
||
match msg {
|
||
ConstellationControlMsg::NavigationResponse(id, fetch_data) => {
|
||
match fetch_data {
|
||
FetchResponseMsg::ProcessResponse(metadata) => self.handle_fetch_metadata(id, metadata),
|
||
FetchResponseMsg::ProcessResponseChunk(chunk) => self.handle_fetch_chunk(id, chunk),
|
||
FetchResponseMsg::ProcessResponseEOF(eof) => self.handle_fetch_eof(id, eof),
|
||
_ => unreachable!(),
|
||
};
|
||
},
|
||
ConstellationControlMsg::Navigate(parent_pipeline_id, browsing_context_id, load_data, replace) =>
|
||
self.handle_navigate(parent_pipeline_id, Some(browsing_context_id), load_data, replace),
|
||
ConstellationControlMsg::SendEvent(id, event) =>
|
||
self.handle_event(id, event),
|
||
ConstellationControlMsg::ResizeInactive(id, new_size) =>
|
||
self.handle_resize_inactive_msg(id, new_size),
|
||
ConstellationControlMsg::GetTitle(pipeline_id) =>
|
||
self.handle_get_title_msg(pipeline_id),
|
||
ConstellationControlMsg::SetDocumentActivity(pipeline_id, activity) =>
|
||
self.handle_set_document_activity_msg(pipeline_id, activity),
|
||
ConstellationControlMsg::ChangeFrameVisibilityStatus(pipeline_id, visible) =>
|
||
self.handle_visibility_change_msg(pipeline_id, visible),
|
||
ConstellationControlMsg::NotifyVisibilityChange(parent_pipeline_id, browsing_context_id, visible) =>
|
||
self.handle_visibility_change_complete_msg(parent_pipeline_id, browsing_context_id, visible),
|
||
ConstellationControlMsg::PostMessage(pipeline_id, origin, data) =>
|
||
self.handle_post_message_msg(pipeline_id, origin, data),
|
||
ConstellationControlMsg::UpdatePipelineId(parent_pipeline_id,
|
||
browsing_context_id,
|
||
new_pipeline_id,
|
||
reason) =>
|
||
self.handle_update_pipeline_id(parent_pipeline_id,
|
||
browsing_context_id,
|
||
new_pipeline_id,
|
||
reason),
|
||
ConstellationControlMsg::FocusIFrame(parent_pipeline_id, frame_id) =>
|
||
self.handle_focus_iframe_msg(parent_pipeline_id, frame_id),
|
||
ConstellationControlMsg::WebDriverScriptCommand(pipeline_id, msg) =>
|
||
self.handle_webdriver_msg(pipeline_id, msg),
|
||
ConstellationControlMsg::TickAllAnimations(pipeline_id) =>
|
||
self.handle_tick_all_animations(pipeline_id),
|
||
ConstellationControlMsg::TransitionEnd(unsafe_node, name, duration) =>
|
||
self.handle_transition_event(unsafe_node, name, duration),
|
||
ConstellationControlMsg::WebFontLoaded(pipeline_id) =>
|
||
self.handle_web_font_loaded(pipeline_id),
|
||
ConstellationControlMsg::DispatchIFrameLoadEvent {
|
||
target: browsing_context_id, parent: parent_id, child: child_id } =>
|
||
self.handle_iframe_load_event(parent_id, browsing_context_id, child_id),
|
||
ConstellationControlMsg::DispatchStorageEvent(pipeline_id, storage, url, key, old_value, new_value) =>
|
||
self.handle_storage_event(pipeline_id, storage, url, key, old_value, new_value),
|
||
ConstellationControlMsg::ReportCSSError(pipeline_id, filename, line, column, msg) =>
|
||
self.handle_css_error_reporting(pipeline_id, filename, line, column, msg),
|
||
ConstellationControlMsg::Reload(pipeline_id) =>
|
||
self.handle_reload(pipeline_id),
|
||
ConstellationControlMsg::ExitPipeline(pipeline_id, discard_browsing_context) =>
|
||
self.handle_exit_pipeline_msg(pipeline_id, discard_browsing_context),
|
||
ConstellationControlMsg::WebVREvents(pipeline_id, events) =>
|
||
self.handle_webvr_events(pipeline_id, events),
|
||
ConstellationControlMsg::PaintMetric(pipeline_id, metric_type, metric_value) =>
|
||
self.handle_paint_metric(pipeline_id, metric_type, metric_value),
|
||
msg @ ConstellationControlMsg::AttachLayout(..) |
|
||
msg @ ConstellationControlMsg::Viewport(..) |
|
||
msg @ ConstellationControlMsg::SetScrollState(..) |
|
||
msg @ ConstellationControlMsg::Resize(..) |
|
||
msg @ ConstellationControlMsg::ExitScriptThread =>
|
||
panic!("should have handled {:?} already", msg),
|
||
}
|
||
}
|
||
|
||
fn handle_msg_from_script(&self, msg: MainThreadScriptMsg) {
|
||
match msg {
|
||
MainThreadScriptMsg::Navigate(parent_pipeline_id, load_data, replace) => {
|
||
self.handle_navigate(parent_pipeline_id, None, load_data, replace)
|
||
},
|
||
MainThreadScriptMsg::ExitWindow(id) => {
|
||
self.handle_exit_window_msg(id)
|
||
},
|
||
MainThreadScriptMsg::Common(CommonScriptMsg::Task(_, task, _)) => {
|
||
task.run_box()
|
||
}
|
||
MainThreadScriptMsg::Common(CommonScriptMsg::CollectReports(chan)) => {
|
||
self.collect_reports(chan)
|
||
},
|
||
MainThreadScriptMsg::WorkletLoaded(pipeline_id) => {
|
||
self.handle_worklet_loaded(pipeline_id)
|
||
},
|
||
MainThreadScriptMsg::RegisterPaintWorklet {
|
||
pipeline_id,
|
||
name,
|
||
properties,
|
||
painter,
|
||
} => {
|
||
self.handle_register_paint_worklet(
|
||
pipeline_id,
|
||
name,
|
||
properties,
|
||
painter,
|
||
)
|
||
},
|
||
MainThreadScriptMsg::DispatchJobQueue { scope_url } => {
|
||
self.job_queue_map.run_job(scope_url, self)
|
||
}
|
||
}
|
||
}
|
||
|
||
fn handle_timer_event(&self, timer_event: TimerEvent) {
|
||
let TimerEvent(source, id) = timer_event;
|
||
|
||
let pipeline_id = match source {
|
||
TimerSource::FromWindow(pipeline_id) => pipeline_id,
|
||
TimerSource::FromWorker => panic!("Worker timeouts must not be sent to script thread"),
|
||
};
|
||
|
||
let window = self.documents.borrow().find_window(pipeline_id);
|
||
let window = match window {
|
||
Some(w) => w,
|
||
None => return warn!("Received fire timer msg for a closed pipeline {}.", pipeline_id),
|
||
};
|
||
|
||
window.handle_fire_timer(id);
|
||
}
|
||
|
||
fn handle_msg_from_devtools(&self, msg: DevtoolScriptControlMsg) {
|
||
let documents = self.documents.borrow();
|
||
match msg {
|
||
DevtoolScriptControlMsg::EvaluateJS(id, s, reply) => {
|
||
match documents.find_window(id) {
|
||
Some(window) => devtools::handle_evaluate_js(window.upcast(), s, reply),
|
||
None => return warn!("Message sent to closed pipeline {}.", id),
|
||
}
|
||
},
|
||
DevtoolScriptControlMsg::GetRootNode(id, reply) =>
|
||
devtools::handle_get_root_node(&*documents, id, reply),
|
||
DevtoolScriptControlMsg::GetDocumentElement(id, reply) =>
|
||
devtools::handle_get_document_element(&*documents, id, reply),
|
||
DevtoolScriptControlMsg::GetChildren(id, node_id, reply) =>
|
||
devtools::handle_get_children(&*documents, id, node_id, reply),
|
||
DevtoolScriptControlMsg::GetLayout(id, node_id, reply) =>
|
||
devtools::handle_get_layout(&*documents, id, node_id, reply),
|
||
DevtoolScriptControlMsg::GetCachedMessages(id, message_types, reply) =>
|
||
devtools::handle_get_cached_messages(id, message_types, reply),
|
||
DevtoolScriptControlMsg::ModifyAttribute(id, node_id, modifications) =>
|
||
devtools::handle_modify_attribute(&*documents, id, node_id, modifications),
|
||
DevtoolScriptControlMsg::WantsLiveNotifications(id, to_send) => {
|
||
match documents.find_window(id) {
|
||
Some(window) => devtools::handle_wants_live_notifications(window.upcast(), to_send),
|
||
None => return warn!("Message sent to closed pipeline {}.", id),
|
||
}
|
||
},
|
||
DevtoolScriptControlMsg::SetTimelineMarkers(id, marker_types, reply) =>
|
||
devtools::handle_set_timeline_markers(&*documents, id, marker_types, reply),
|
||
DevtoolScriptControlMsg::DropTimelineMarkers(id, marker_types) =>
|
||
devtools::handle_drop_timeline_markers(&*documents, id, marker_types),
|
||
DevtoolScriptControlMsg::RequestAnimationFrame(id, name) =>
|
||
devtools::handle_request_animation_frame(&*documents, id, name),
|
||
DevtoolScriptControlMsg::Reload(id) =>
|
||
devtools::handle_reload(&*documents, id),
|
||
}
|
||
}
|
||
|
||
fn handle_msg_from_image_cache(&self, (id, response): (PipelineId, PendingImageResponse)) {
|
||
let window = self.documents.borrow().find_window(id);
|
||
if let Some(ref window) = window {
|
||
window.pending_image_notification(response);
|
||
}
|
||
}
|
||
|
||
fn handle_webdriver_msg(&self, pipeline_id: PipelineId, msg: WebDriverScriptCommand) {
|
||
let documents = self.documents.borrow();
|
||
match msg {
|
||
WebDriverScriptCommand::AddCookie(params, reply) =>
|
||
webdriver_handlers::handle_add_cookie(&*documents, pipeline_id, params, reply),
|
||
WebDriverScriptCommand::ExecuteScript(script, reply) =>
|
||
webdriver_handlers::handle_execute_script(&*documents, pipeline_id, script, reply),
|
||
WebDriverScriptCommand::FindElementCSS(selector, reply) =>
|
||
webdriver_handlers::handle_find_element_css(&*documents, pipeline_id, selector, reply),
|
||
WebDriverScriptCommand::FindElementsCSS(selector, reply) =>
|
||
webdriver_handlers::handle_find_elements_css(&*documents, pipeline_id, selector, reply),
|
||
WebDriverScriptCommand::FocusElement(element_id, reply) =>
|
||
webdriver_handlers::handle_focus_element(&*documents, pipeline_id, element_id, reply),
|
||
WebDriverScriptCommand::GetActiveElement(reply) =>
|
||
webdriver_handlers::handle_get_active_element(&*documents, pipeline_id, reply),
|
||
WebDriverScriptCommand::GetCookies(reply) =>
|
||
webdriver_handlers::handle_get_cookies(&*documents, pipeline_id, reply),
|
||
WebDriverScriptCommand::GetCookie(name, reply) =>
|
||
webdriver_handlers::handle_get_cookie(&*documents, pipeline_id, name, reply),
|
||
WebDriverScriptCommand::GetElementTagName(node_id, reply) =>
|
||
webdriver_handlers::handle_get_name(&*documents, pipeline_id, node_id, reply),
|
||
WebDriverScriptCommand::GetElementAttribute(node_id, name, reply) =>
|
||
webdriver_handlers::handle_get_attribute(&*documents, pipeline_id, node_id, name, reply),
|
||
WebDriverScriptCommand::GetElementCSS(node_id, name, reply) =>
|
||
webdriver_handlers::handle_get_css(&*documents, pipeline_id, node_id, name, reply),
|
||
WebDriverScriptCommand::GetElementRect(node_id, reply) =>
|
||
webdriver_handlers::handle_get_rect(&*documents, pipeline_id, node_id, reply),
|
||
WebDriverScriptCommand::GetElementText(node_id, reply) =>
|
||
webdriver_handlers::handle_get_text(&*documents, pipeline_id, node_id, reply),
|
||
WebDriverScriptCommand::GetBrowsingContextId(webdriver_frame_id, reply) =>
|
||
webdriver_handlers::handle_get_browsing_context_id(&*documents, pipeline_id, webdriver_frame_id, reply),
|
||
WebDriverScriptCommand::GetUrl(reply) =>
|
||
webdriver_handlers::handle_get_url(&*documents, pipeline_id, reply),
|
||
WebDriverScriptCommand::IsEnabled(element_id, reply) =>
|
||
webdriver_handlers::handle_is_enabled(&*documents, pipeline_id, element_id, reply),
|
||
WebDriverScriptCommand::IsSelected(element_id, reply) =>
|
||
webdriver_handlers::handle_is_selected(&*documents, pipeline_id, element_id, reply),
|
||
WebDriverScriptCommand::GetTitle(reply) =>
|
||
webdriver_handlers::handle_get_title(&*documents, pipeline_id, reply),
|
||
WebDriverScriptCommand::ExecuteAsyncScript(script, reply) =>
|
||
webdriver_handlers::handle_execute_async_script(&*documents, pipeline_id, script, reply),
|
||
}
|
||
}
|
||
|
||
fn handle_resize(&self, id: PipelineId, size: WindowSizeData, size_type: WindowSizeType) {
|
||
let window = self.documents.borrow().find_window(id);
|
||
if let Some(ref window) = window {
|
||
window.set_resize_event(size, size_type);
|
||
return;
|
||
}
|
||
let mut loads = self.incomplete_loads.borrow_mut();
|
||
if let Some(ref mut load) = loads.iter_mut().find(|load| load.pipeline_id == id) {
|
||
load.window_size = Some(size);
|
||
return;
|
||
}
|
||
warn!("resize sent to nonexistent pipeline");
|
||
}
|
||
|
||
fn handle_viewport(&self, id: PipelineId, rect: Rect<f32>) {
|
||
let document = self.documents.borrow().find_document(id);
|
||
if let Some(document) = document {
|
||
if document.window().set_page_clip_rect_with_new_viewport(rect) {
|
||
self.rebuild_and_force_reflow(&document, ReflowReason::Viewport);
|
||
}
|
||
return;
|
||
}
|
||
let loads = self.incomplete_loads.borrow();
|
||
if loads.iter().any(|load| load.pipeline_id == id) {
|
||
return;
|
||
}
|
||
warn!("Page rect message sent to nonexistent pipeline");
|
||
}
|
||
|
||
fn handle_set_scroll_state(&self,
|
||
id: PipelineId,
|
||
scroll_states: &[(UntrustedNodeAddress, Vector2D<f32>)]) {
|
||
let window = match { self.documents.borrow().find_window(id) } {
|
||
Some(window) => window,
|
||
None => return warn!("Set scroll state message sent to nonexistent pipeline: {:?}", id),
|
||
};
|
||
|
||
let mut scroll_offsets = HashMap::new();
|
||
for &(node_address, ref scroll_offset) in scroll_states {
|
||
if node_address == UntrustedNodeAddress(ptr::null()) {
|
||
window.update_viewport_for_scroll(-scroll_offset.x, -scroll_offset.y);
|
||
} else {
|
||
scroll_offsets.insert(node_address, -*scroll_offset);
|
||
}
|
||
}
|
||
window.set_scroll_offsets(scroll_offsets)
|
||
}
|
||
|
||
fn handle_new_layout(&self, new_layout_info: NewLayoutInfo, origin: MutableOrigin) {
|
||
let NewLayoutInfo {
|
||
parent_info,
|
||
new_pipeline_id,
|
||
browsing_context_id,
|
||
top_level_browsing_context_id,
|
||
load_data,
|
||
window_size,
|
||
pipeline_port,
|
||
content_process_shutdown_chan,
|
||
layout_threads,
|
||
} = new_layout_info;
|
||
|
||
let layout_pair = channel();
|
||
let layout_chan = layout_pair.0.clone();
|
||
|
||
let msg = message::Msg::CreateLayoutThread(NewLayoutThreadInfo {
|
||
id: new_pipeline_id,
|
||
url: load_data.url.clone(),
|
||
is_parent: false,
|
||
layout_pair: layout_pair,
|
||
pipeline_port: pipeline_port,
|
||
constellation_chan: self.layout_to_constellation_chan.clone(),
|
||
script_chan: self.control_chan.clone(),
|
||
image_cache: self.image_cache.clone(),
|
||
content_process_shutdown_chan: content_process_shutdown_chan,
|
||
layout_threads: layout_threads,
|
||
paint_time_metrics: PaintTimeMetrics::new(new_pipeline_id,
|
||
self.time_profiler_chan.clone(),
|
||
self.layout_to_constellation_chan.clone(),
|
||
self.control_chan.clone(),
|
||
load_data.url.clone()),
|
||
});
|
||
|
||
// Pick a layout thread, any layout thread
|
||
let current_layout_chan = self.documents.borrow().iter().next()
|
||
.map(|(_, document)| document.window().layout_chan().clone())
|
||
.or_else(|| self.incomplete_loads.borrow().first().map(|load| load.layout_chan.clone()));
|
||
|
||
match current_layout_chan {
|
||
None => panic!("Layout attached to empty script thread."),
|
||
// Tell the layout thread factory to actually spawn the thread.
|
||
Some(layout_chan) => layout_chan.send(msg).unwrap(),
|
||
};
|
||
|
||
// Kick off the fetch for the new resource.
|
||
let new_load = InProgressLoad::new(new_pipeline_id,
|
||
browsing_context_id,
|
||
top_level_browsing_context_id,
|
||
parent_info,
|
||
layout_chan,
|
||
window_size,
|
||
load_data.url.clone(),
|
||
origin);
|
||
if load_data.url.as_str() == "about:blank" {
|
||
self.start_page_load_about_blank(new_load, load_data.js_eval_result);
|
||
} else {
|
||
self.pre_page_load(new_load, load_data);
|
||
}
|
||
}
|
||
|
||
fn collect_reports(&self, reports_chan: ReportsChan) {
|
||
let documents = self.documents.borrow();
|
||
let urls = itertools::join(documents.iter().map(|(_, d)| d.url().to_string()), ", ");
|
||
let path_seg = format!("url({})", urls);
|
||
|
||
let mut reports = vec![];
|
||
reports.extend(get_reports(self.get_cx(), path_seg));
|
||
reports_chan.send(reports);
|
||
}
|
||
|
||
/// Updates iframe element after a change in visibility
|
||
fn handle_visibility_change_complete_msg(&self,
|
||
parent_pipeline_id: PipelineId,
|
||
browsing_context_id: BrowsingContextId,
|
||
visible: bool)
|
||
{
|
||
let iframe = self.documents.borrow().find_iframe(parent_pipeline_id, browsing_context_id);
|
||
if let Some(iframe) = iframe {
|
||
iframe.change_visibility_status(visible);
|
||
}
|
||
}
|
||
|
||
/// Handle visibility change message
|
||
fn handle_visibility_change_msg(&self, id: PipelineId, visible: bool) {
|
||
// Separate message sent since parent script thread could be different (Iframe of different
|
||
// domain)
|
||
self.script_sender.send((id, ScriptMsg::VisibilityChangeComplete(visible))).unwrap();
|
||
|
||
let window = self.documents.borrow().find_window(id);
|
||
match window {
|
||
Some(window) => {
|
||
window.alter_resource_utilization(visible);
|
||
return;
|
||
}
|
||
None => {
|
||
let mut loads = self.incomplete_loads.borrow_mut();
|
||
if let Some(ref mut load) = loads.iter_mut().find(|load| load.pipeline_id == id) {
|
||
load.is_visible = visible;
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
warn!("change visibility message sent to nonexistent pipeline");
|
||
}
|
||
|
||
/// Handles activity change message
|
||
fn handle_set_document_activity_msg(&self, id: PipelineId, activity: DocumentActivity) {
|
||
debug!("Setting activity of {} to be {:?} in {:?}.", id, activity, thread::current().name());
|
||
let document = self.documents.borrow().find_document(id);
|
||
if let Some(document) = document {
|
||
document.set_activity(activity);
|
||
return;
|
||
}
|
||
let mut loads = self.incomplete_loads.borrow_mut();
|
||
if let Some(ref mut load) = loads.iter_mut().find(|load| load.pipeline_id == id) {
|
||
load.activity = activity;
|
||
return;
|
||
}
|
||
warn!("change of activity sent to nonexistent pipeline");
|
||
}
|
||
|
||
fn handle_focus_iframe_msg(&self,
|
||
parent_pipeline_id: PipelineId,
|
||
browsing_context_id: BrowsingContextId) {
|
||
let doc = self.documents.borrow().find_document(parent_pipeline_id).unwrap();
|
||
let frame_element = doc.find_iframe(browsing_context_id);
|
||
|
||
if let Some(ref frame_element) = frame_element {
|
||
doc.begin_focus_transaction();
|
||
doc.request_focus(frame_element.upcast());
|
||
doc.commit_focus_transaction(FocusType::Parent);
|
||
}
|
||
}
|
||
|
||
fn handle_post_message_msg(&self, pipeline_id: PipelineId, origin: Option<ImmutableOrigin>, data: Vec<u8>) {
|
||
match { self.documents.borrow().find_window(pipeline_id) } {
|
||
None => return warn!("postMessage after pipeline {} closed.", pipeline_id),
|
||
Some(window) => window.post_message(origin, StructuredCloneData::Vector(data)),
|
||
}
|
||
}
|
||
|
||
fn handle_update_pipeline_id(&self,
|
||
parent_pipeline_id: PipelineId,
|
||
browsing_context_id: BrowsingContextId,
|
||
new_pipeline_id: PipelineId,
|
||
reason: UpdatePipelineIdReason) {
|
||
let frame_element = self.documents.borrow().find_iframe(parent_pipeline_id, browsing_context_id);
|
||
if let Some(frame_element) = frame_element {
|
||
frame_element.update_pipeline_id(new_pipeline_id, reason);
|
||
}
|
||
}
|
||
|
||
/// Window was resized, but this script was not active, so don't reflow yet
|
||
fn handle_resize_inactive_msg(&self, id: PipelineId, new_size: WindowSizeData) {
|
||
let window = self.documents.borrow().find_window(id)
|
||
.expect("ScriptThread: received a resize msg for a pipeline not in this script thread. This is a bug.");
|
||
window.set_window_size(new_size);
|
||
}
|
||
|
||
/// We have gotten a window.close from script, which we pass on to the compositor.
|
||
/// We do not shut down the script thread now, because the compositor will ask the
|
||
/// constellation to shut down the pipeline, which will clean everything up
|
||
/// normally. If we do exit, we will tear down the DOM nodes, possibly at a point
|
||
/// where layout is still accessing them.
|
||
fn handle_exit_window_msg(&self, id: PipelineId) {
|
||
debug!("script thread handling exit window msg");
|
||
|
||
// TODO(tkuehn): currently there is only one window,
|
||
// so this can afford to be naive and just shut down the
|
||
// constellation. In the future it'll need to be smarter.
|
||
self.script_sender.send((id, ScriptMsg::Exit)).unwrap();
|
||
}
|
||
|
||
/// We have received notification that the response associated with a load has completed.
|
||
/// Kick off the document and frame tree creation process using the result.
|
||
fn handle_page_headers_available(&self, id: &PipelineId,
|
||
metadata: Option<Metadata>) -> Option<DomRoot<ServoParser>> {
|
||
let idx = self.incomplete_loads.borrow().iter().position(|load| { load.pipeline_id == *id });
|
||
// The matching in progress load structure may not exist if
|
||
// the pipeline exited before the page load completed.
|
||
match idx {
|
||
Some(idx) => {
|
||
// https://html.spec.whatwg.org/multipage/#process-a-navigate-response
|
||
// 2. If response's status is 204 or 205, then abort these steps.
|
||
match metadata {
|
||
Some(Metadata { status: Some((204 ... 205, _)), .. }) => {
|
||
self.script_sender
|
||
.send((id.clone(), ScriptMsg::AbortLoadUrl))
|
||
.unwrap();
|
||
return None;
|
||
},
|
||
_ => ()
|
||
};
|
||
|
||
let load = self.incomplete_loads.borrow_mut().remove(idx);
|
||
metadata.map(|meta| self.load(meta, load))
|
||
}
|
||
None => {
|
||
assert!(self.closed_pipelines.borrow().contains(id));
|
||
None
|
||
}
|
||
}
|
||
}
|
||
|
||
pub fn handle_get_registration(&self, scope_url: &ServoUrl) -> Option<DomRoot<ServiceWorkerRegistration>> {
|
||
let maybe_registration_ref = self.registration_map.borrow();
|
||
maybe_registration_ref.get(scope_url).map(|x| DomRoot::from_ref(&**x))
|
||
}
|
||
|
||
pub fn handle_serviceworker_registration(&self,
|
||
scope: &ServoUrl,
|
||
registration: &ServiceWorkerRegistration,
|
||
pipeline_id: PipelineId) {
|
||
{
|
||
let ref mut reg_ref = *self.registration_map.borrow_mut();
|
||
// according to spec we should replace if an older registration exists for
|
||
// same scope otherwise just insert the new one
|
||
let _ = reg_ref.remove(scope);
|
||
reg_ref.insert(scope.clone(), Dom::from_ref(registration));
|
||
}
|
||
|
||
// send ScopeThings to sw-manager
|
||
let ref maybe_registration_ref = *self.registration_map.borrow();
|
||
let maybe_registration = match maybe_registration_ref.get(scope) {
|
||
Some(r) => r,
|
||
None => return
|
||
};
|
||
let window = match { self.documents.borrow().find_window(pipeline_id) } {
|
||
Some(window) => window,
|
||
None => return warn!("Registration failed for {}", scope),
|
||
};
|
||
|
||
let script_url = maybe_registration.get_installed().get_script_url();
|
||
let scope_things = ServiceWorkerRegistration::create_scope_things(window.upcast(), script_url);
|
||
let _ = self.script_sender.send((pipeline_id, ScriptMsg::RegisterServiceWorker(scope_things, scope.clone())));
|
||
}
|
||
|
||
pub fn schedule_job_queue(&self, scope_url: ServoUrl) {
|
||
let _ = self.chan.0.send(MainThreadScriptMsg::DispatchJobQueue { scope_url });
|
||
}
|
||
|
||
pub fn dom_manipulation_task_source(&self, pipeline_id: PipelineId) -> DOMManipulationTaskSource {
|
||
DOMManipulationTaskSource(self.dom_manipulation_task_sender.clone(), pipeline_id)
|
||
}
|
||
|
||
pub fn performance_timeline_task_source(&self, pipeline_id: PipelineId) -> PerformanceTimelineTaskSource {
|
||
PerformanceTimelineTaskSource(self.performance_timeline_task_sender.clone(), pipeline_id)
|
||
}
|
||
|
||
pub fn user_interaction_task_source(&self, pipeline_id: PipelineId) -> UserInteractionTaskSource {
|
||
UserInteractionTaskSource(self.user_interaction_task_sender.clone(), pipeline_id)
|
||
}
|
||
|
||
pub fn networking_task_source(&self, pipeline_id: PipelineId) -> NetworkingTaskSource {
|
||
NetworkingTaskSource(self.networking_task_sender.clone(), pipeline_id)
|
||
}
|
||
|
||
pub fn file_reading_task_source(&self, pipeline_id: PipelineId) -> FileReadingTaskSource {
|
||
FileReadingTaskSource(self.file_reading_task_sender.clone(), pipeline_id)
|
||
}
|
||
|
||
/// Handles a request for the window title.
|
||
fn handle_get_title_msg(&self, pipeline_id: PipelineId) {
|
||
let document = match { self.documents.borrow().find_document(pipeline_id) } {
|
||
Some(document) => document,
|
||
None => return warn!("Message sent to closed pipeline {}.", pipeline_id),
|
||
};
|
||
document.send_title_to_constellation();
|
||
}
|
||
|
||
/// Handles a request to exit a pipeline and shut down layout.
|
||
fn handle_exit_pipeline_msg(&self, id: PipelineId, discard_bc: DiscardBrowsingContext) {
|
||
debug!("Exiting pipeline {}.", id);
|
||
|
||
self.closed_pipelines.borrow_mut().insert(id);
|
||
|
||
// Check if the exit message is for an in progress load.
|
||
let idx = self.incomplete_loads.borrow().iter().position(|load| {
|
||
load.pipeline_id == id
|
||
});
|
||
|
||
let document = self.documents.borrow_mut().remove(id);
|
||
|
||
// We should never have a pipeline that's still an incomplete load,
|
||
// but also has a Document.
|
||
debug_assert!(idx.is_none() || document.is_none());
|
||
|
||
// Remove any incomplete load.
|
||
let chan = if let Some(idx) = idx {
|
||
let load = self.incomplete_loads.borrow_mut().remove(idx);
|
||
load.layout_chan.clone()
|
||
} else if let Some(ref document) = document {
|
||
document.window().layout_chan().clone()
|
||
} else {
|
||
return warn!("Exiting nonexistant pipeline {}.", id);
|
||
};
|
||
|
||
// We shut down layout before removing the document,
|
||
// since layout might still be in the middle of laying it out.
|
||
debug!("preparing to shut down layout for page {}", id);
|
||
let (response_chan, response_port) = channel();
|
||
chan.send(message::Msg::PrepareToExit(response_chan)).ok();
|
||
let _ = response_port.recv();
|
||
|
||
debug!("shutting down layout for page {}", id);
|
||
chan.send(message::Msg::ExitNow).ok();
|
||
self.script_sender.send((id, ScriptMsg::PipelineExited)).ok();
|
||
|
||
// Now that layout is shut down, it's OK to remove the document.
|
||
if let Some(document) = document {
|
||
// We don't want to dispatch `mouseout` event pointing to non-existing element
|
||
if let Some(target) = self.topmost_mouse_over_target.get() {
|
||
if target.upcast::<Node>().owner_doc() == document {
|
||
self.topmost_mouse_over_target.set(None);
|
||
}
|
||
}
|
||
|
||
// We discard the browsing context after requesting layout shut down,
|
||
// to avoid running layout on detached iframes.
|
||
let window = document.window();
|
||
if discard_bc == DiscardBrowsingContext::Yes {
|
||
window.window_proxy().discard_browsing_context();
|
||
}
|
||
window.clear_js_runtime();
|
||
}
|
||
|
||
debug!("Exited pipeline {}.", id);
|
||
}
|
||
|
||
/// Handles a request to exit the script thread and shut down layout.
|
||
fn handle_exit_script_thread_msg(&self) {
|
||
debug!("Exiting script thread.");
|
||
|
||
let mut pipeline_ids = Vec::new();
|
||
pipeline_ids.extend(self.incomplete_loads.borrow().iter().next().map(|load| load.pipeline_id));
|
||
pipeline_ids.extend(self.documents.borrow().iter().next().map(|(pipeline_id, _)| pipeline_id));
|
||
|
||
for pipeline_id in pipeline_ids {
|
||
self.handle_exit_pipeline_msg(pipeline_id, DiscardBrowsingContext::Yes);
|
||
}
|
||
|
||
debug!("Exited script thread.");
|
||
}
|
||
|
||
/// Handles when layout thread finishes all animation in one tick
|
||
fn handle_tick_all_animations(&self, id: PipelineId) {
|
||
let document = match { self.documents.borrow().find_document(id) } {
|
||
Some(document) => document,
|
||
None => return warn!("Message sent to closed pipeline {}.", id),
|
||
};
|
||
document.run_the_animation_frame_callbacks();
|
||
}
|
||
|
||
/// Handles firing of transition events.
|
||
fn handle_transition_event(&self, unsafe_node: UntrustedNodeAddress, name: String, duration: f64) {
|
||
let js_runtime = self.js_runtime.rt();
|
||
let node = unsafe {
|
||
from_untrusted_node_address(js_runtime, unsafe_node)
|
||
};
|
||
|
||
let idx = self.transitioning_nodes
|
||
.borrow()
|
||
.iter()
|
||
.position(|n| &**n as *const _ == &*node as *const _);
|
||
match idx {
|
||
Some(idx) => {
|
||
self.transitioning_nodes.borrow_mut().remove(idx);
|
||
}
|
||
None => {
|
||
// If no index is found, we can't know whether this node is safe to use.
|
||
// It's better not to fire a DOM event than crash.
|
||
warn!("Ignoring transition end notification for unknown node.");
|
||
return;
|
||
}
|
||
}
|
||
|
||
let window = window_from_node(&*node);
|
||
|
||
// Not quite the right thing - see #13865.
|
||
node.dirty(NodeDamage::NodeStyleDamaged);
|
||
|
||
if let Some(el) = node.downcast::<Element>() {
|
||
if !el.has_css_layout_box() {
|
||
return;
|
||
}
|
||
}
|
||
|
||
let init = TransitionEventInit {
|
||
parent: EventInit {
|
||
bubbles: true,
|
||
cancelable: false,
|
||
},
|
||
propertyName: DOMString::from(name),
|
||
elapsedTime: Finite::new(duration as f32).unwrap(),
|
||
// FIXME: Handle pseudo-elements properly
|
||
pseudoElement: DOMString::new()
|
||
};
|
||
let transition_event = TransitionEvent::new(&window,
|
||
atom!("transitionend"),
|
||
&init);
|
||
transition_event.upcast::<Event>().fire(node.upcast());
|
||
}
|
||
|
||
/// Handles a Web font being loaded. Does nothing if the page no longer exists.
|
||
fn handle_web_font_loaded(&self, pipeline_id: PipelineId) {
|
||
let document = self.documents.borrow().find_document(pipeline_id);
|
||
if let Some(document) = document {
|
||
self.rebuild_and_force_reflow(&document, ReflowReason::WebFontLoaded);
|
||
}
|
||
}
|
||
|
||
/// Handles a worklet being loaded. Does nothing if the page no longer exists.
|
||
fn handle_worklet_loaded(&self, pipeline_id: PipelineId) {
|
||
let document = self.documents.borrow().find_document(pipeline_id);
|
||
if let Some(document) = document {
|
||
self.rebuild_and_force_reflow(&document, ReflowReason::WorkletLoaded);
|
||
}
|
||
}
|
||
|
||
/// Notify a window of a storage event
|
||
fn handle_storage_event(&self, pipeline_id: PipelineId, storage_type: StorageType, url: ServoUrl,
|
||
key: Option<String>, old_value: Option<String>, new_value: Option<String>) {
|
||
let window = match { self.documents.borrow().find_window(pipeline_id) } {
|
||
None => return warn!("Storage event sent to closed pipeline {}.", pipeline_id),
|
||
Some(window) => window,
|
||
};
|
||
|
||
let storage = match storage_type {
|
||
StorageType::Local => window.LocalStorage(),
|
||
StorageType::Session => window.SessionStorage(),
|
||
};
|
||
|
||
storage.queue_storage_event(url, key, old_value, new_value);
|
||
}
|
||
|
||
/// Notify the containing document of a child iframe that has completed loading.
|
||
fn handle_iframe_load_event(&self,
|
||
parent_id: PipelineId,
|
||
browsing_context_id: BrowsingContextId,
|
||
child_id: PipelineId) {
|
||
let iframe = self.documents.borrow().find_iframe(parent_id, browsing_context_id);
|
||
match iframe {
|
||
Some(iframe) => iframe.iframe_load_event_steps(child_id),
|
||
None => warn!("Message sent to closed pipeline {}.", parent_id),
|
||
}
|
||
}
|
||
|
||
fn ask_constellation_for_browsing_context_id(&self, pipeline_id: PipelineId) -> Option<BrowsingContextId> {
|
||
let (result_sender, result_receiver) = ipc::channel().unwrap();
|
||
let msg = ScriptMsg::GetBrowsingContextId(pipeline_id, result_sender);
|
||
self.script_sender.send((pipeline_id, msg)).expect("Failed to send to constellation.");
|
||
result_receiver.recv().expect("Failed to get frame id from constellation.")
|
||
}
|
||
|
||
fn ask_constellation_for_parent_info(&self, pipeline_id: PipelineId) -> Option<PipelineId> {
|
||
let (result_sender, result_receiver) = ipc::channel().unwrap();
|
||
let msg = ScriptMsg::GetParentInfo(pipeline_id, result_sender);
|
||
self.script_sender.send((pipeline_id, msg)).expect("Failed to send to constellation.");
|
||
result_receiver.recv().expect("Failed to get frame id from constellation.")
|
||
}
|
||
|
||
// Get the browsing context for a pipeline that may exist in another
|
||
// script thread. If the browsing context already exists in the
|
||
// `window_proxies` map, we return it, otherwise we recursively
|
||
// get the browsing context for the parent if there is one,
|
||
// construct a new dissimilar-origin browsing context, add it
|
||
// to the `window_proxies` map, and return it.
|
||
fn remote_window_proxy(&self,
|
||
global_to_clone: &GlobalScope,
|
||
top_level_browsing_context_id: TopLevelBrowsingContextId,
|
||
pipeline_id: PipelineId)
|
||
-> Option<DomRoot<WindowProxy>>
|
||
{
|
||
let browsing_context_id = self.ask_constellation_for_browsing_context_id(pipeline_id)?;
|
||
if let Some(window_proxy) = self.window_proxies.borrow().get(&browsing_context_id) {
|
||
return Some(DomRoot::from_ref(window_proxy));
|
||
}
|
||
let parent = self.ask_constellation_for_parent_info(pipeline_id).and_then(|parent_id| {
|
||
self.remote_window_proxy(global_to_clone, top_level_browsing_context_id, parent_id)
|
||
});
|
||
let window_proxy = WindowProxy::new_dissimilar_origin(global_to_clone,
|
||
browsing_context_id,
|
||
top_level_browsing_context_id,
|
||
parent.r());
|
||
self.window_proxies.borrow_mut().insert(browsing_context_id, Dom::from_ref(&*window_proxy));
|
||
Some(window_proxy)
|
||
}
|
||
|
||
// Get the browsing context for a pipeline that exists in this
|
||
// script thread. If the browsing context already exists in the
|
||
// `window_proxies` map, we return it, otherwise we recursively
|
||
// get the browsing context for the parent if there is one,
|
||
// construct a new similar-origin browsing context, add it
|
||
// to the `window_proxies` map, and return it.
|
||
fn local_window_proxy(&self,
|
||
window: &Window,
|
||
browsing_context_id: BrowsingContextId,
|
||
top_level_browsing_context_id: TopLevelBrowsingContextId,
|
||
parent_info: Option<PipelineId>)
|
||
-> DomRoot<WindowProxy>
|
||
{
|
||
if let Some(window_proxy) = self.window_proxies.borrow().get(&browsing_context_id) {
|
||
window_proxy.set_currently_active(&*window);
|
||
return DomRoot::from_ref(window_proxy);
|
||
}
|
||
let iframe = parent_info.and_then(|parent_id| {
|
||
self.documents.borrow().find_iframe(parent_id, browsing_context_id)
|
||
});
|
||
let parent = match (parent_info, iframe.as_ref()) {
|
||
(_, Some(iframe)) => Some(window_from_node(&**iframe).window_proxy()),
|
||
(Some(parent_id), _) => self.remote_window_proxy(window.upcast(),
|
||
top_level_browsing_context_id,
|
||
parent_id),
|
||
_ => None,
|
||
};
|
||
let window_proxy = WindowProxy::new(&window,
|
||
browsing_context_id,
|
||
top_level_browsing_context_id,
|
||
iframe.r().map(Castable::upcast),
|
||
parent.r());
|
||
self.window_proxies.borrow_mut().insert(browsing_context_id, Dom::from_ref(&*window_proxy));
|
||
window_proxy
|
||
}
|
||
|
||
/// The entry point to document loading. Defines bindings, sets up the window and document
|
||
/// objects, parses HTML and CSS, and kicks off initial layout.
|
||
fn load(&self, metadata: Metadata, incomplete: InProgressLoad) -> DomRoot<ServoParser> {
|
||
let final_url = metadata.final_url.clone();
|
||
{
|
||
// send the final url to the layout thread.
|
||
incomplete.layout_chan
|
||
.send(message::Msg::SetFinalUrl(final_url.clone()))
|
||
.unwrap();
|
||
|
||
// update the pipeline url
|
||
self.script_sender
|
||
.send((incomplete.pipeline_id, ScriptMsg::SetFinalUrl(final_url.clone())))
|
||
.unwrap();
|
||
}
|
||
debug!("ScriptThread: loading {} on pipeline {:?}", incomplete.url, incomplete.pipeline_id);
|
||
|
||
let MainThreadScriptChan(ref sender) = self.chan;
|
||
let HistoryTraversalTaskSource(ref history_sender) = self.history_traversal_task_source;
|
||
|
||
let (ipc_timer_event_chan, ipc_timer_event_port) = ipc::channel().unwrap();
|
||
ROUTER.route_ipc_receiver_to_mpsc_sender(ipc_timer_event_port,
|
||
self.timer_event_chan.clone());
|
||
|
||
let origin = if final_url.as_str() == "about:blank" {
|
||
incomplete.origin.clone()
|
||
} else {
|
||
MutableOrigin::new(final_url.origin())
|
||
};
|
||
|
||
let script_to_constellation_chan = ScriptToConstellationChan {
|
||
sender: self.script_sender.clone(),
|
||
pipeline_id: incomplete.pipeline_id,
|
||
};
|
||
|
||
// Create the window and document objects.
|
||
let window = Window::new(
|
||
self.js_runtime.clone(),
|
||
MainThreadScriptChan(sender.clone()),
|
||
self.dom_manipulation_task_source(incomplete.pipeline_id),
|
||
self.user_interaction_task_source(incomplete.pipeline_id),
|
||
self.networking_task_source(incomplete.pipeline_id),
|
||
HistoryTraversalTaskSource(history_sender.clone()),
|
||
self.file_reading_task_source(incomplete.pipeline_id),
|
||
self.performance_timeline_task_source(incomplete.pipeline_id).clone(),
|
||
self.image_cache_channel.clone(),
|
||
self.image_cache.clone(),
|
||
self.resource_threads.clone(),
|
||
self.bluetooth_thread.clone(),
|
||
self.mem_profiler_chan.clone(),
|
||
self.time_profiler_chan.clone(),
|
||
self.devtools_chan.clone(),
|
||
script_to_constellation_chan,
|
||
self.control_chan.clone(),
|
||
self.scheduler_chan.clone(),
|
||
ipc_timer_event_chan,
|
||
incomplete.layout_chan,
|
||
incomplete.pipeline_id,
|
||
incomplete.parent_info,
|
||
incomplete.window_size,
|
||
origin,
|
||
incomplete.navigation_start,
|
||
incomplete.navigation_start_precise,
|
||
self.webgl_chan.as_ref().map(|chan| chan.channel()),
|
||
self.webvr_chan.clone(),
|
||
self.microtask_queue.clone(),
|
||
self.webrender_document,
|
||
);
|
||
|
||
// Initialize the browsing context for the window.
|
||
let window_proxy = self.local_window_proxy(&window,
|
||
incomplete.browsing_context_id,
|
||
incomplete.top_level_browsing_context_id,
|
||
incomplete.parent_info);
|
||
window.init_window_proxy(&window_proxy);
|
||
|
||
let last_modified = metadata.headers.as_ref().and_then(|headers| {
|
||
headers.get().map(|&LastModified(HttpDate(ref tm))| dom_last_modified(tm))
|
||
});
|
||
|
||
let content_type = metadata.content_type
|
||
.as_ref()
|
||
.map(|&Serde(ContentType(ref mimetype))| mimetype.clone());
|
||
|
||
let loader = DocumentLoader::new_with_threads(self.resource_threads.clone(),
|
||
Some(final_url.clone()));
|
||
|
||
let is_html_document = match metadata.content_type {
|
||
Some(Serde(ContentType(Mime(TopLevel::Application, SubLevel::Ext(ref sub_level), _))))
|
||
if sub_level.ends_with("+xml") => IsHTMLDocument::NonHTMLDocument,
|
||
|
||
Some(Serde(ContentType(Mime(TopLevel::Application, SubLevel::Xml, _)))) |
|
||
Some(Serde(ContentType(Mime(TopLevel::Text, SubLevel::Xml, _)))) => IsHTMLDocument::NonHTMLDocument,
|
||
|
||
_ => IsHTMLDocument::HTMLDocument,
|
||
};
|
||
|
||
let referrer = match metadata.referrer {
|
||
Some(ref referrer) => Some(referrer.clone().into_string()),
|
||
None => None,
|
||
};
|
||
|
||
let referrer_policy = metadata.headers
|
||
.as_ref()
|
||
.map(Serde::deref)
|
||
.and_then(Headers::get::<ReferrerPolicyHeader>)
|
||
.map(ReferrerPolicy::from);
|
||
|
||
let document = Document::new(&window,
|
||
HasBrowsingContext::Yes,
|
||
Some(final_url.clone()),
|
||
incomplete.origin,
|
||
is_html_document,
|
||
content_type,
|
||
last_modified,
|
||
incomplete.activity,
|
||
DocumentSource::FromParser,
|
||
loader,
|
||
referrer,
|
||
referrer_policy,
|
||
incomplete.canceller);
|
||
document.set_ready_state(DocumentReadyState::Loading);
|
||
|
||
self.documents.borrow_mut().insert(incomplete.pipeline_id, &*document);
|
||
|
||
window.init_document(&document);
|
||
|
||
self.script_sender
|
||
.send((incomplete.pipeline_id, ScriptMsg::ActivateDocument))
|
||
.unwrap();
|
||
|
||
// Notify devtools that a new script global exists.
|
||
self.notify_devtools(document.Title(), final_url.clone(), (incomplete.pipeline_id, None));
|
||
|
||
let parse_input = DOMString::new();
|
||
|
||
document.set_https_state(metadata.https_state);
|
||
document.set_navigation_start(incomplete.navigation_start_precise);
|
||
|
||
if is_html_document == IsHTMLDocument::NonHTMLDocument {
|
||
ServoParser::parse_xml_document(&document, parse_input, final_url);
|
||
} else {
|
||
ServoParser::parse_html_document(&document, parse_input, final_url);
|
||
}
|
||
|
||
if incomplete.activity == DocumentActivity::FullyActive {
|
||
window.resume();
|
||
} else {
|
||
window.suspend();
|
||
}
|
||
|
||
if !incomplete.is_visible {
|
||
window.alter_resource_utilization(false);
|
||
}
|
||
|
||
document.get_current_parser().unwrap()
|
||
}
|
||
|
||
fn notify_devtools(&self, title: DOMString, url: ServoUrl, ids: (PipelineId, Option<WorkerId>)) {
|
||
if let Some(ref chan) = self.devtools_chan {
|
||
let page_info = DevtoolsPageInfo {
|
||
title: String::from(title),
|
||
url: url,
|
||
};
|
||
chan.send(ScriptToDevtoolsControlMsg::NewGlobal(
|
||
ids,
|
||
self.devtools_sender.clone(),
|
||
page_info)).unwrap();
|
||
}
|
||
}
|
||
|
||
/// Reflows non-incrementally, rebuilding the entire layout tree in the process.
|
||
fn rebuild_and_force_reflow(&self, document: &Document, reason: ReflowReason) {
|
||
let window = window_from_node(&*document);
|
||
document.dirty_all_nodes();
|
||
window.reflow(ReflowGoal::Full, reason);
|
||
}
|
||
|
||
/// This is the main entry point for receiving and dispatching DOM events.
|
||
///
|
||
/// TODO: Actually perform DOM event dispatch.
|
||
fn handle_event(&self, pipeline_id: PipelineId, event: CompositorEvent) {
|
||
match event {
|
||
ResizeEvent(new_size, size_type) => {
|
||
self.handle_resize_event(pipeline_id, new_size, size_type);
|
||
}
|
||
|
||
MouseButtonEvent(event_type, button, point, node_address, point_in_node) => {
|
||
self.handle_mouse_event(
|
||
pipeline_id,
|
||
event_type,
|
||
button,
|
||
point,
|
||
node_address,
|
||
point_in_node
|
||
);
|
||
}
|
||
|
||
MouseMoveEvent(point, node_address) => {
|
||
let document = match { self.documents.borrow().find_document(pipeline_id) } {
|
||
Some(document) => document,
|
||
None => return warn!("Message sent to closed pipeline {}.", pipeline_id),
|
||
};
|
||
|
||
// Get the previous target temporarily
|
||
let prev_mouse_over_target = self.topmost_mouse_over_target.get();
|
||
|
||
document.handle_mouse_move_event(self.js_runtime.rt(), point,
|
||
&self.topmost_mouse_over_target,
|
||
node_address);
|
||
|
||
// Short-circuit if nothing changed
|
||
if self.topmost_mouse_over_target.get() == prev_mouse_over_target {
|
||
return;
|
||
}
|
||
|
||
let mut state_already_changed = false;
|
||
|
||
// Notify Constellation about the topmost anchor mouse over target.
|
||
if let Some(target) = self.topmost_mouse_over_target.get() {
|
||
if let Some(anchor) = target.upcast::<Node>()
|
||
.inclusive_ancestors()
|
||
.filter_map(DomRoot::downcast::<HTMLAnchorElement>)
|
||
.next() {
|
||
let status = anchor.upcast::<Element>()
|
||
.get_attribute(&ns!(), &local_name!("href"))
|
||
.and_then(|href| {
|
||
let value = href.value();
|
||
let url = document.url();
|
||
url.join(&value).map(|url| url.to_string()).ok()
|
||
});
|
||
|
||
let event = ScriptMsg::NodeStatus(status);
|
||
self.script_sender.send((pipeline_id, event)).unwrap();
|
||
|
||
state_already_changed = true;
|
||
}
|
||
}
|
||
|
||
// We might have to reset the anchor state
|
||
if !state_already_changed {
|
||
if let Some(target) = prev_mouse_over_target {
|
||
if let Some(_) = target.upcast::<Node>()
|
||
.inclusive_ancestors()
|
||
.filter_map(DomRoot::downcast::<HTMLAnchorElement>)
|
||
.next() {
|
||
let event = ScriptMsg::NodeStatus(None);
|
||
self.script_sender.send((pipeline_id, event)).unwrap();
|
||
}
|
||
}
|
||
}
|
||
}
|
||
TouchEvent(event_type, identifier, point, node_address) => {
|
||
let touch_result = self.handle_touch_event(
|
||
pipeline_id,
|
||
event_type,
|
||
identifier,
|
||
point,
|
||
node_address
|
||
);
|
||
match (event_type, touch_result) {
|
||
(TouchEventType::Down, TouchEventResult::Processed(handled)) => {
|
||
let result = if handled {
|
||
// TODO: Wait to see if preventDefault is called on the first touchmove event.
|
||
EventResult::DefaultAllowed
|
||
} else {
|
||
EventResult::DefaultPrevented
|
||
};
|
||
let message = ScriptMsg::TouchEventProcessed(result);
|
||
self.script_sender.send((pipeline_id, message)).unwrap();
|
||
}
|
||
_ => {
|
||
// TODO: Calling preventDefault on a touchup event should prevent clicks.
|
||
}
|
||
}
|
||
}
|
||
|
||
KeyEvent(ch, key, state, modifiers) => {
|
||
let document = match { self.documents.borrow().find_document(pipeline_id) } {
|
||
Some(document) => document,
|
||
None => return warn!("Message sent to closed pipeline {}.", pipeline_id),
|
||
};
|
||
document.dispatch_key_event(ch, key, state, modifiers);
|
||
}
|
||
}
|
||
}
|
||
|
||
fn handle_mouse_event(
|
||
&self,
|
||
pipeline_id: PipelineId,
|
||
mouse_event_type: MouseEventType,
|
||
button: MouseButton,
|
||
point: Point2D<f32>,
|
||
node_address: Option<UntrustedNodeAddress>,
|
||
point_in_node: Option<Point2D<f32>>
|
||
) {
|
||
let document = match { self.documents.borrow().find_document(pipeline_id) } {
|
||
Some(document) => document,
|
||
None => return warn!("Message sent to closed pipeline {}.", pipeline_id),
|
||
};
|
||
document.handle_mouse_event(
|
||
self.js_runtime.rt(),
|
||
button,
|
||
point,
|
||
mouse_event_type,
|
||
node_address,
|
||
point_in_node
|
||
);
|
||
}
|
||
|
||
fn handle_touch_event(
|
||
&self,
|
||
pipeline_id: PipelineId,
|
||
event_type: TouchEventType,
|
||
identifier: TouchId,
|
||
point: Point2D<f32>,
|
||
node_address: Option<UntrustedNodeAddress>
|
||
) -> TouchEventResult {
|
||
let document = match { self.documents.borrow().find_document(pipeline_id) } {
|
||
Some(document) => document,
|
||
None => {
|
||
warn!("Message sent to closed pipeline {}.", pipeline_id);
|
||
return TouchEventResult::Processed(true);
|
||
},
|
||
};
|
||
document.handle_touch_event(
|
||
self.js_runtime.rt(),
|
||
event_type,
|
||
identifier,
|
||
point,
|
||
node_address
|
||
)
|
||
}
|
||
|
||
/// <https://html.spec.whatwg.org/multipage/#navigating-across-documents>
|
||
/// The entry point for content to notify that a new load has been requested
|
||
/// for the given pipeline (specifically the "navigate" algorithm).
|
||
fn handle_navigate(&self, parent_pipeline_id: PipelineId,
|
||
browsing_context_id: Option<BrowsingContextId>,
|
||
mut load_data: LoadData,
|
||
replace: bool) {
|
||
let is_javascript = load_data.url.scheme() == "javascript";
|
||
if is_javascript {
|
||
let window = self.documents.borrow().find_window(parent_pipeline_id);
|
||
if let Some(window) = window {
|
||
ScriptThread::eval_js_url(window.upcast::<GlobalScope>(), &mut load_data);
|
||
}
|
||
}
|
||
|
||
match browsing_context_id {
|
||
Some(browsing_context_id) => {
|
||
let iframe = self.documents.borrow().find_iframe(parent_pipeline_id, browsing_context_id);
|
||
if let Some(iframe) = iframe {
|
||
iframe.navigate_or_reload_child_browsing_context(Some(load_data), NavigationType::Regular, replace);
|
||
}
|
||
}
|
||
None => {
|
||
self.script_sender
|
||
.send((parent_pipeline_id, ScriptMsg::LoadUrl(load_data, replace)))
|
||
.unwrap();
|
||
}
|
||
}
|
||
}
|
||
|
||
pub fn eval_js_url(global_scope: &GlobalScope, load_data: &mut LoadData) {
|
||
// Turn javascript: URL into JS code to eval, according to the steps in
|
||
// https://html.spec.whatwg.org/multipage/#javascript-protocol
|
||
|
||
// This slice of the URL’s serialization is equivalent to (5.) to (7.):
|
||
// Start with the scheme data of the parsed URL;
|
||
// append question mark and query component, if any;
|
||
// append number sign and fragment component if any.
|
||
let encoded = &load_data.url.clone()[Position::BeforePath..];
|
||
|
||
// Percent-decode (8.) and UTF-8 decode (9.)
|
||
let script_source = percent_decode(encoded.as_bytes()).decode_utf8_lossy();
|
||
|
||
// Script source is ready to be evaluated (11.)
|
||
let _ac = JSAutoCompartment::new(global_scope.get_cx(), global_scope.reflector().get_jsobject().get());
|
||
rooted!(in(global_scope.get_cx()) let mut jsval = UndefinedValue());
|
||
global_scope.evaluate_js_on_global_with_result(&script_source, jsval.handle_mut());
|
||
|
||
load_data.js_eval_result = if jsval.get().is_string() {
|
||
unsafe {
|
||
let strval = DOMString::from_jsval(global_scope.get_cx(),
|
||
jsval.handle(),
|
||
StringificationBehavior::Empty);
|
||
match strval {
|
||
Ok(ConversionResult::Success(s)) => {
|
||
Some(JsEvalResult::Ok(String::from(s).as_bytes().to_vec()))
|
||
},
|
||
_ => None,
|
||
}
|
||
}
|
||
} else {
|
||
Some(JsEvalResult::NoContent)
|
||
};
|
||
|
||
load_data.url = ServoUrl::parse("about:blank").unwrap();
|
||
}
|
||
|
||
fn handle_resize_event(&self, pipeline_id: PipelineId, new_size: WindowSizeData, size_type: WindowSizeType) {
|
||
let document = match { self.documents.borrow().find_document(pipeline_id) } {
|
||
Some(document) => document,
|
||
None => return warn!("Message sent to closed pipeline {}.", pipeline_id),
|
||
};
|
||
|
||
let window = document.window();
|
||
window.set_window_size(new_size);
|
||
window.force_reflow(ReflowGoal::Full, ReflowReason::WindowResize);
|
||
|
||
// http://dev.w3.org/csswg/cssom-view/#resizing-viewports
|
||
if size_type == WindowSizeType::Resize {
|
||
let uievent = UIEvent::new(&window,
|
||
DOMString::from("resize"), EventBubbles::DoesNotBubble,
|
||
EventCancelable::NotCancelable, Some(&window),
|
||
0i32);
|
||
uievent.upcast::<Event>().fire(window.upcast());
|
||
}
|
||
|
||
// https://html.spec.whatwg.org/multipage/#event-loop-processing-model
|
||
// Step 7.7 - evaluate media queries and report changes
|
||
// Since we have resized, we need to re-evaluate MQLs
|
||
window.evaluate_media_queries_and_report_changes();
|
||
}
|
||
|
||
/// Instructs the constellation to fetch the document that will be loaded. Stores the InProgressLoad
|
||
/// argument until a notification is received that the fetch is complete.
|
||
fn pre_page_load(&self, mut incomplete: InProgressLoad, load_data: LoadData) {
|
||
let id = incomplete.pipeline_id.clone();
|
||
let req_init = RequestInit {
|
||
url: load_data.url.clone(),
|
||
method: load_data.method,
|
||
destination: Destination::Document,
|
||
credentials_mode: CredentialsMode::Include,
|
||
use_url_credentials: true,
|
||
pipeline_id: Some(id),
|
||
referrer_url: load_data.referrer_url,
|
||
referrer_policy: load_data.referrer_policy,
|
||
headers: load_data.headers,
|
||
body: load_data.data,
|
||
redirect_mode: RedirectMode::Manual,
|
||
origin: incomplete.origin.immutable().clone(),
|
||
.. RequestInit::default()
|
||
};
|
||
|
||
let context = ParserContext::new(id, load_data.url);
|
||
self.incomplete_parser_contexts.borrow_mut().push((id, context));
|
||
|
||
let cancel_chan = incomplete.canceller.initialize();
|
||
|
||
self.script_sender.send((id, ScriptMsg::InitiateNavigateRequest(req_init, cancel_chan))).unwrap();
|
||
self.incomplete_loads.borrow_mut().push(incomplete);
|
||
}
|
||
|
||
fn handle_fetch_metadata(&self, id: PipelineId, fetch_metadata: Result<FetchMetadata, NetworkError>) {
|
||
match fetch_metadata {
|
||
Ok(_) => {},
|
||
Err(ref e) => warn!("Network error: {:?}", e),
|
||
};
|
||
let mut incomplete_parser_contexts = self.incomplete_parser_contexts.borrow_mut();
|
||
let parser = incomplete_parser_contexts.iter_mut().find(|&&mut (pipeline_id, _)| pipeline_id == id);
|
||
if let Some(&mut (_, ref mut ctxt)) = parser {
|
||
ctxt.process_response(fetch_metadata);
|
||
}
|
||
}
|
||
|
||
fn handle_fetch_chunk(&self, id: PipelineId, chunk: Vec<u8>) {
|
||
let mut incomplete_parser_contexts = self.incomplete_parser_contexts.borrow_mut();
|
||
let parser = incomplete_parser_contexts.iter_mut().find(|&&mut (pipeline_id, _)| pipeline_id == id);
|
||
if let Some(&mut (_, ref mut ctxt)) = parser {
|
||
ctxt.process_response_chunk(chunk);
|
||
}
|
||
}
|
||
|
||
fn handle_fetch_eof(&self, id: PipelineId, eof: Result<(), NetworkError>) {
|
||
let idx = self.incomplete_parser_contexts.borrow().iter().position(|&(pipeline_id, _)| {
|
||
pipeline_id == id
|
||
});
|
||
if let Some(idx) = idx {
|
||
let (_, mut ctxt) = self.incomplete_parser_contexts.borrow_mut().remove(idx);
|
||
ctxt.process_response_eof(eof);
|
||
}
|
||
}
|
||
|
||
/// Synchronously fetch `about:blank`. Stores the `InProgressLoad`
|
||
/// argument until a notification is received that the fetch is complete.
|
||
fn start_page_load_about_blank(&self, incomplete: InProgressLoad, js_eval_result: Option<JsEvalResult>) {
|
||
let id = incomplete.pipeline_id;
|
||
|
||
self.incomplete_loads.borrow_mut().push(incomplete);
|
||
|
||
let url = ServoUrl::parse("about:blank").unwrap();
|
||
let mut context = ParserContext::new(id, url.clone());
|
||
|
||
let mut meta = Metadata::default(url);
|
||
meta.set_content_type(Some(&mime!(Text / Html)));
|
||
|
||
// If this page load is the result of a javascript scheme url, map
|
||
// the evaluation result into a response.
|
||
let chunk = match js_eval_result {
|
||
Some(JsEvalResult::Ok(content)) => content,
|
||
Some(JsEvalResult::NoContent) => {
|
||
meta.status = Some((204, b"No Content".to_vec()));
|
||
vec![]
|
||
},
|
||
None => vec![]
|
||
};
|
||
|
||
context.process_response(Ok(FetchMetadata::Unfiltered(meta)));
|
||
context.process_response_chunk(chunk);
|
||
context.process_response_eof(Ok(()));
|
||
}
|
||
|
||
fn handle_css_error_reporting(&self, pipeline_id: PipelineId, filename: String,
|
||
line: u32, column: u32, msg: String) {
|
||
let sender = match self.devtools_chan {
|
||
Some(ref sender) => sender,
|
||
None => return,
|
||
};
|
||
|
||
if let Some(global) = self.documents.borrow().find_global(pipeline_id) {
|
||
if global.live_devtools_updates() {
|
||
let css_error = CSSError {
|
||
filename: filename,
|
||
line: line,
|
||
column: column,
|
||
msg: msg
|
||
};
|
||
let message = ScriptToDevtoolsControlMsg::ReportCSSError(pipeline_id, css_error);
|
||
sender.send(message).unwrap();
|
||
}
|
||
}
|
||
}
|
||
|
||
fn handle_reload(&self, pipeline_id: PipelineId) {
|
||
let window = self.documents.borrow().find_window(pipeline_id);
|
||
if let Some(window) = window {
|
||
window.Location().reload_without_origin_check();
|
||
}
|
||
}
|
||
|
||
fn handle_webvr_events(&self, pipeline_id: PipelineId, events: Vec<WebVREvent>) {
|
||
let window = self.documents.borrow().find_window(pipeline_id);
|
||
if let Some(window) = window {
|
||
let vr = window.Navigator().Vr();
|
||
vr.handle_webvr_events(events);
|
||
}
|
||
}
|
||
|
||
fn handle_paint_metric(&self,
|
||
pipeline_id: PipelineId,
|
||
metric_type: ProgressiveWebMetricType,
|
||
metric_value: u64) {
|
||
let window = self.documents.borrow().find_window(pipeline_id);
|
||
if let Some(window) = window {
|
||
let entry = PerformancePaintTiming::new(&window.upcast::<GlobalScope>(),
|
||
metric_type, metric_value);
|
||
window.Performance().queue_entry(&entry.upcast::<PerformanceEntry>(),
|
||
true /* buffer performance entry */);
|
||
}
|
||
}
|
||
|
||
pub fn enqueue_microtask(job: Microtask) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
let script_thread = unsafe { &*root.get().unwrap() };
|
||
script_thread.microtask_queue.enqueue(job);
|
||
});
|
||
}
|
||
|
||
fn perform_a_microtask_checkpoint(&self) {
|
||
self.microtask_queue.checkpoint(|id| self.documents.borrow().find_global(id))
|
||
}
|
||
}
|
||
|
||
impl Drop for ScriptThread {
|
||
fn drop(&mut self) {
|
||
SCRIPT_THREAD_ROOT.with(|root| {
|
||
root.set(None);
|
||
});
|
||
}
|
||
}
|
||
|
||
fn dom_last_modified(tm: &Tm) -> String {
|
||
tm.to_local().strftime("%m/%d/%Y %H:%M:%S").unwrap().to_string()
|
||
}
|