1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

use std::collections::{HashMap, VecDeque};
use std::fmt;

use canvas_traits::canvas::{CanvasId, CanvasMsg};
use devtools_traits::{ScriptToDevtoolsControlMsg, WorkerId};
use embedder_traits::{EmbedderMsg, MediaSessionEvent};
use euclid::default::Size2D as UntypedSize2D;
use euclid::Size2D;
use gfx_traits::Epoch;
use ipc_channel::ipc::{IpcReceiver, IpcSender};
use msg::constellation_msg::{
    BroadcastChannelRouterId, BrowsingContextId, HistoryStateId, MessagePortId,
    MessagePortRouterId, PipelineId, ServiceWorkerId, ServiceWorkerRegistrationId,
    TopLevelBrowsingContextId, TraversalDirection,
};
use net_traits::request::RequestBuilder;
use net_traits::storage_thread::StorageType;
use net_traits::CoreResourceMsg;
use serde::{Deserialize, Serialize};
use servo_url::{ImmutableOrigin, ServoUrl};
use smallvec::SmallVec;
use style_traits::CSSPixel;
use webgpu::{wgpu, WebGPU, WebGPUResponseResult};
use webrender_api::units::{DeviceIntPoint, DeviceIntSize};

use crate::{
    AnimationState, AuxiliaryBrowsingContextLoadInfo, BroadcastMsg, DocumentState,
    IFrameLoadInfoWithData, LoadData, MessagePortMsg, PortMessageTask, StructuredSerializedData,
    WindowSizeType, WorkerGlobalScopeInit, WorkerScriptLoadOrigin,
};

/// An iframe sizing operation.
#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
pub struct IFrameSizeMsg {
    /// The child browsing context for this iframe.
    pub browsing_context_id: BrowsingContextId,
    /// The size of the iframe.
    pub size: Size2D<f32, CSSPixel>,
    /// The kind of sizing operation.
    pub type_: WindowSizeType,
}

/// Messages from the layout to the constellation.
#[derive(Deserialize, Serialize)]
pub enum LayoutMsg {
    /// Inform the constellation of the size of the iframe's viewport.
    IFrameSizes(Vec<IFrameSizeMsg>),
    /// Requests that the constellation inform the compositor that it needs to record
    /// the time when the frame with the given ID (epoch) is painted.
    PendingPaintMetric(PipelineId, Epoch),
}

impl fmt::Debug for LayoutMsg {
    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        use self::LayoutMsg::*;
        let variant = match *self {
            IFrameSizes(..) => "IFrameSizes",
            PendingPaintMetric(..) => "PendingPaintMetric",
        };
        write!(formatter, "LayoutMsg::{}", variant)
    }
}

/// Whether a DOM event was prevented by web content
#[derive(Debug, Deserialize, Serialize)]
pub enum EventResult {
    /// Allowed by web content
    DefaultAllowed,
    /// Prevented by web content
    DefaultPrevented,
}

/// A log entry reported to the constellation
/// We don't report all log entries, just serious ones.
/// We need a separate type for this because `LogLevel` isn't serializable.
#[derive(Clone, Debug, Deserialize, Serialize)]
pub enum LogEntry {
    /// Panic, with a reason and backtrace
    Panic(String, String),
    /// Error, with a reason
    Error(String),
    /// warning, with a reason
    Warn(String),
}

/// <https://html.spec.whatwg.org/multipage/#replacement-enabled>
#[derive(Debug, Deserialize, Serialize)]
pub enum HistoryEntryReplacement {
    /// Traverse the history with replacement enabled.
    Enabled,
    /// Traverse the history with replacement disabled.
    Disabled,
}

/// Messages from the script to the constellation.
#[derive(Deserialize, Serialize)]
pub enum ScriptMsg {
    /// Request to complete the transfer of a set of ports to a router.
    CompleteMessagePortTransfer(MessagePortRouterId, Vec<MessagePortId>),
    /// The results of attempting to complete the transfer of a batch of ports.
    MessagePortTransferResult(
        /* The router whose transfer of ports succeeded, if any */
        Option<MessagePortRouterId>,
        /* The ids of ports transferred successfully */
        Vec<MessagePortId>,
        /* The ids, and buffers, of ports whose transfer failed */
        HashMap<MessagePortId, VecDeque<PortMessageTask>>,
    ),
    /// A new message-port was created or transferred, with corresponding control-sender.
    NewMessagePort(MessagePortRouterId, MessagePortId),
    /// A global has started managing message-ports
    NewMessagePortRouter(MessagePortRouterId, IpcSender<MessagePortMsg>),
    /// A global has stopped managing message-ports
    RemoveMessagePortRouter(MessagePortRouterId),
    /// A task requires re-routing to an already shipped message-port.
    RerouteMessagePort(MessagePortId, PortMessageTask),
    /// A message-port was shipped, let the entangled port know.
    MessagePortShipped(MessagePortId),
    /// A message-port has been discarded by script.
    RemoveMessagePort(MessagePortId),
    /// Entangle two message-ports.
    EntanglePorts(MessagePortId, MessagePortId),
    /// A global has started managing broadcast-channels.
    NewBroadcastChannelRouter(
        BroadcastChannelRouterId,
        IpcSender<BroadcastMsg>,
        ImmutableOrigin,
    ),
    /// A global has stopped managing broadcast-channels.
    RemoveBroadcastChannelRouter(BroadcastChannelRouterId, ImmutableOrigin),
    /// A global started managing broadcast channels for a given channel-name.
    NewBroadcastChannelNameInRouter(BroadcastChannelRouterId, String, ImmutableOrigin),
    /// A global stopped managing broadcast channels for a given channel-name.
    RemoveBroadcastChannelNameInRouter(BroadcastChannelRouterId, String, ImmutableOrigin),
    /// Broadcast a message to all same-origin broadcast channels,
    /// excluding the source of the broadcast.
    ScheduleBroadcast(BroadcastChannelRouterId, BroadcastMsg),
    /// Forward a message to the embedder.
    ForwardToEmbedder(EmbedderMsg),
    /// Requests are sent to constellation and fetches are checked manually
    /// for cross-origin loads
    InitiateNavigateRequest(RequestBuilder, /* cancellation_chan */ IpcReceiver<()>),
    /// Broadcast a storage event to every same-origin pipeline.
    /// The strings are key, old value and new value.
    BroadcastStorageEvent(
        StorageType,
        ServoUrl,
        Option<String>,
        Option<String>,
        Option<String>,
    ),
    /// Indicates whether this pipeline is currently running animations.
    ChangeRunningAnimationsState(AnimationState),
    /// Requests that a new 2D canvas thread be created. (This is done in the constellation because
    /// 2D canvases may use the GPU and we don't want to give untrusted content access to the GPU.)
    CreateCanvasPaintThread(
        UntypedSize2D<u64>,
        IpcSender<(IpcSender<CanvasMsg>, CanvasId)>,
    ),
    /// Notifies the constellation that this frame has received focus.
    Focus,
    /// Get the top-level browsing context info for a given browsing context.
    GetTopForBrowsingContext(
        BrowsingContextId,
        IpcSender<Option<TopLevelBrowsingContextId>>,
    ),
    /// Get the browsing context id of the browsing context in which pipeline is
    /// embedded and the parent pipeline id of that browsing context.
    GetBrowsingContextInfo(
        PipelineId,
        IpcSender<Option<(BrowsingContextId, Option<PipelineId>)>>,
    ),
    /// Get the nth child browsing context ID for a given browsing context, sorted in tree order.
    GetChildBrowsingContextId(
        BrowsingContextId,
        usize,
        IpcSender<Option<BrowsingContextId>>,
    ),
    /// All pending loads are complete, and the `load` event for this pipeline
    /// has been dispatched.
    LoadComplete,
    /// A new load has been requested, with an option to replace the current entry once loaded
    /// instead of adding a new entry.
    LoadUrl(LoadData, HistoryEntryReplacement),
    /// Abort loading after sending a LoadUrl message.
    AbortLoadUrl,
    /// Post a message to the currently active window of a given browsing context.
    PostMessage {
        /// The target of the posted message.
        target: BrowsingContextId,
        /// The source of the posted message.
        source: PipelineId,
        /// The expected origin of the target.
        target_origin: Option<ImmutableOrigin>,
        /// The source origin of the message.
        /// <https://html.spec.whatwg.org/multipage/#dom-messageevent-origin>
        source_origin: ImmutableOrigin,
        /// The data to be posted.
        data: StructuredSerializedData,
    },
    /// Inform the constellation that a fragment was navigated to and whether or not it was a replacement navigation.
    NavigatedToFragment(ServoUrl, HistoryEntryReplacement),
    /// HTMLIFrameElement Forward or Back traversal.
    TraverseHistory(TraversalDirection),
    /// Inform the constellation of a pushed history state.
    PushHistoryState(HistoryStateId, ServoUrl),
    /// Inform the constellation of a replaced history state.
    ReplaceHistoryState(HistoryStateId, ServoUrl),
    /// Gets the length of the joint session history from the constellation.
    JointSessionHistoryLength(IpcSender<u32>),
    /// Notification that this iframe should be removed.
    /// Returns a list of pipelines which were closed.
    RemoveIFrame(BrowsingContextId, IpcSender<Vec<PipelineId>>),
    /// Successful response to [crate::ConstellationControlMsg::SetThrottled].
    SetThrottledComplete(bool),
    /// A load has been requested in an IFrame.
    ScriptLoadedURLInIFrame(IFrameLoadInfoWithData),
    /// A load of the initial `about:blank` has been completed in an IFrame.
    ScriptNewIFrame(IFrameLoadInfoWithData),
    /// Script has opened a new auxiliary browsing context.
    ScriptNewAuxiliary(AuxiliaryBrowsingContextLoadInfo),
    /// Mark a new document as active
    ActivateDocument,
    /// Set the document state for a pipeline (used by screenshot / reftests)
    SetDocumentState(DocumentState),
    /// Update the layout epoch in the constellation (used by screenshot / reftests).
    SetLayoutEpoch(Epoch, IpcSender<bool>),
    /// Update the pipeline Url, which can change after redirections.
    SetFinalUrl(ServoUrl),
    /// Script has handled a touch event, and either prevented or allowed default actions.
    TouchEventProcessed(EventResult),
    /// A log entry, with the top-level browsing context id and thread name
    LogEntry(Option<String>, LogEntry),
    /// Discard the document.
    DiscardDocument,
    /// Discard the browsing context.
    DiscardTopLevelBrowsingContext,
    /// Notifies the constellation that this pipeline has exited.
    PipelineExited,
    /// Send messages from postMessage calls from serviceworker
    /// to constellation for storing in service worker manager
    ForwardDOMMessage(DOMMessage, ServoUrl),
    /// <https://w3c.github.io/ServiceWorker/#schedule-job-algorithm>
    ScheduleJob(Job),
    /// Get Window Informations size and position
    GetClientWindow(IpcSender<(DeviceIntSize, DeviceIntPoint)>),
    /// Get the screen size (pixel)
    GetScreenSize(IpcSender<DeviceIntSize>),
    /// Get the available screen size (pixel)
    GetScreenAvailSize(IpcSender<DeviceIntSize>),
    /// Notifies the constellation about media session events
    /// (i.e. when there is metadata for the active media session, playback state changes...).
    MediaSessionEvent(PipelineId, MediaSessionEvent),
    /// Create a WebGPU Adapter instance
    RequestAdapter(
        IpcSender<Option<WebGPUResponseResult>>,
        wgpu::instance::RequestAdapterOptions,
        SmallVec<[wgpu::id::AdapterId; 4]>,
    ),
    /// Get WebGPU channel
    GetWebGPUChan(IpcSender<Option<WebGPU>>),
    /// Notify the constellation of a pipeline's document's title.
    TitleChanged(PipelineId, String),
}

impl fmt::Debug for ScriptMsg {
    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        use self::ScriptMsg::*;
        let variant = match *self {
            CompleteMessagePortTransfer(..) => "CompleteMessagePortTransfer",
            MessagePortTransferResult(..) => "MessagePortTransferResult",
            NewMessagePortRouter(..) => "NewMessagePortRouter",
            RemoveMessagePortRouter(..) => "RemoveMessagePortRouter",
            NewMessagePort(..) => "NewMessagePort",
            RerouteMessagePort(..) => "RerouteMessagePort",
            RemoveMessagePort(..) => "RemoveMessagePort",
            MessagePortShipped(..) => "MessagePortShipped",
            EntanglePorts(..) => "EntanglePorts",
            NewBroadcastChannelRouter(..) => "NewBroadcastChannelRouter",
            RemoveBroadcastChannelRouter(..) => "RemoveBroadcastChannelRouter",
            RemoveBroadcastChannelNameInRouter(..) => "RemoveBroadcastChannelNameInRouter",
            NewBroadcastChannelNameInRouter(..) => "NewBroadcastChannelNameInRouter",
            ScheduleBroadcast(..) => "ScheduleBroadcast",
            ForwardToEmbedder(..) => "ForwardToEmbedder",
            InitiateNavigateRequest(..) => "InitiateNavigateRequest",
            BroadcastStorageEvent(..) => "BroadcastStorageEvent",
            ChangeRunningAnimationsState(..) => "ChangeRunningAnimationsState",
            CreateCanvasPaintThread(..) => "CreateCanvasPaintThread",
            Focus => "Focus",
            GetBrowsingContextInfo(..) => "GetBrowsingContextInfo",
            GetTopForBrowsingContext(..) => "GetParentBrowsingContext",
            GetChildBrowsingContextId(..) => "GetChildBrowsingContextId",
            LoadComplete => "LoadComplete",
            LoadUrl(..) => "LoadUrl",
            AbortLoadUrl => "AbortLoadUrl",
            PostMessage { .. } => "PostMessage",
            NavigatedToFragment(..) => "NavigatedToFragment",
            TraverseHistory(..) => "TraverseHistory",
            PushHistoryState(..) => "PushHistoryState",
            ReplaceHistoryState(..) => "ReplaceHistoryState",
            JointSessionHistoryLength(..) => "JointSessionHistoryLength",
            RemoveIFrame(..) => "RemoveIFrame",
            SetThrottledComplete(..) => "SetThrottledComplete",
            ScriptLoadedURLInIFrame(..) => "ScriptLoadedURLInIFrame",
            ScriptNewIFrame(..) => "ScriptNewIFrame",
            ScriptNewAuxiliary(..) => "ScriptNewAuxiliary",
            ActivateDocument => "ActivateDocument",
            SetDocumentState(..) => "SetDocumentState",
            SetLayoutEpoch(..) => "SetLayoutEpoch",
            SetFinalUrl(..) => "SetFinalUrl",
            TouchEventProcessed(..) => "TouchEventProcessed",
            LogEntry(..) => "LogEntry",
            DiscardDocument => "DiscardDocument",
            DiscardTopLevelBrowsingContext => "DiscardTopLevelBrowsingContext",
            PipelineExited => "PipelineExited",
            ForwardDOMMessage(..) => "ForwardDOMMessage",
            ScheduleJob(..) => "ScheduleJob",
            GetClientWindow(..) => "GetClientWindow",
            GetScreenSize(..) => "GetScreenSize",
            GetScreenAvailSize(..) => "GetScreenAvailSize",
            MediaSessionEvent(..) => "MediaSessionEvent",
            RequestAdapter(..) => "RequestAdapter",
            GetWebGPUChan(..) => "GetWebGPUChan",
            TitleChanged(..) => "TitleChanged",
        };
        write!(formatter, "ScriptMsg::{}", variant)
    }
}

/// Entities required to spawn service workers
#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct ScopeThings {
    /// script resource url
    pub script_url: ServoUrl,
    /// network load origin of the resource
    pub worker_load_origin: WorkerScriptLoadOrigin,
    /// base resources required to create worker global scopes
    pub init: WorkerGlobalScopeInit,
    /// the port to receive devtools message from
    pub devtools_chan: Option<IpcSender<ScriptToDevtoolsControlMsg>>,
    /// service worker id
    pub worker_id: WorkerId,
}

/// Message that gets passed to service worker scope on postMessage
#[derive(Debug, Deserialize, Serialize)]
pub struct DOMMessage {
    /// The origin of the message
    pub origin: ImmutableOrigin,
    /// The payload of the message
    pub data: StructuredSerializedData,
}

/// Channels to allow service worker manager to communicate with constellation and resource thread
#[derive(Deserialize, Serialize)]
pub struct SWManagerSenders {
    /// Sender of messages to the constellation.
    pub swmanager_sender: IpcSender<SWManagerMsg>,
    /// Sender for communicating with resource thread.
    pub resource_sender: IpcSender<CoreResourceMsg>,
    /// Sender of messages to the manager.
    pub own_sender: IpcSender<ServiceWorkerMsg>,
    /// Receiver of messages from the constellation.
    pub receiver: IpcReceiver<ServiceWorkerMsg>,
}

/// Messages sent to Service Worker Manager thread
#[derive(Debug, Deserialize, Serialize)]
pub enum ServiceWorkerMsg {
    /// Timeout message sent by active service workers
    Timeout(ServoUrl),
    /// Message sent by constellation to forward to a running service worker
    ForwardDOMMessage(DOMMessage, ServoUrl),
    /// <https://w3c.github.io/ServiceWorker/#schedule-job-algorithm>
    ScheduleJob(Job),
    /// Exit the service worker manager
    Exit,
}

#[derive(Debug, Deserialize, PartialEq, Serialize)]
/// <https://w3c.github.io/ServiceWorker/#dfn-job-type>
pub enum JobType {
    /// <https://w3c.github.io/ServiceWorker/#register>
    Register,
    /// <https://w3c.github.io/ServiceWorker/#unregister-algorithm>
    Unregister,
    /// <https://w3c.github.io/ServiceWorker/#update-algorithm>
    Update,
}

#[derive(Debug, Deserialize, Serialize)]
/// The kind of error the job promise should be rejected with.
pub enum JobError {
    /// <https://w3c.github.io/ServiceWorker/#reject-job-promise>
    TypeError,
    /// <https://w3c.github.io/ServiceWorker/#reject-job-promise>
    SecurityError,
}

#[derive(Debug, Deserialize, Serialize)]
#[allow(clippy::large_enum_variant)]
/// Messages sent from Job algorithms steps running in the SW manager,
/// in order to resolve or reject the job promise.
pub enum JobResult {
    /// <https://w3c.github.io/ServiceWorker/#reject-job-promise>
    RejectPromise(JobError),
    /// <https://w3c.github.io/ServiceWorker/#resolve-job-promise>
    ResolvePromise(Job, JobResultValue),
}

#[derive(Debug, Deserialize, Serialize)]
/// Jobs are resolved with the help of various values.
pub enum JobResultValue {
    /// Data representing a serviceworker registration.
    Registration {
        /// The Id of the registration.
        id: ServiceWorkerRegistrationId,
        /// The installing worker, if any.
        installing_worker: Option<ServiceWorkerId>,
        /// The waiting worker, if any.
        waiting_worker: Option<ServiceWorkerId>,
        /// The active worker, if any.
        active_worker: Option<ServiceWorkerId>,
    },
}

#[derive(Debug, Deserialize, Serialize)]
/// <https://w3c.github.io/ServiceWorker/#dfn-job>
pub struct Job {
    /// <https://w3c.github.io/ServiceWorker/#dfn-job-type>
    pub job_type: JobType,
    /// <https://w3c.github.io/ServiceWorker/#dfn-job-scope-url>
    pub scope_url: ServoUrl,
    /// <https://w3c.github.io/ServiceWorker/#dfn-job-script-url>
    pub script_url: ServoUrl,
    /// <https://w3c.github.io/ServiceWorker/#dfn-job-client>
    pub client: IpcSender<JobResult>,
    /// <https://w3c.github.io/ServiceWorker/#job-referrer>
    pub referrer: ServoUrl,
    /// Various data needed to process job.
    pub scope_things: Option<ScopeThings>,
}

impl Job {
    /// <https://w3c.github.io/ServiceWorker/#create-job-algorithm>
    pub fn create_job(
        job_type: JobType,
        scope_url: ServoUrl,
        script_url: ServoUrl,
        client: IpcSender<JobResult>,
        referrer: ServoUrl,
        scope_things: Option<ScopeThings>,
    ) -> Job {
        Job {
            job_type,
            scope_url,
            script_url,
            client,
            referrer,
            scope_things,
        }
    }
}

impl PartialEq for Job {
    /// Equality criteria as described in <https://w3c.github.io/ServiceWorker/#dfn-job-equivalent>
    fn eq(&self, other: &Self) -> bool {
        // TODO: match on job type, take worker type and `update_via_cache_mode` into account.
        let same_job = self.job_type == other.job_type;
        if same_job {
            match self.job_type {
                JobType::Register | JobType::Update => {
                    self.scope_url == other.scope_url && self.script_url == other.script_url
                },
                JobType::Unregister => self.scope_url == other.scope_url,
            }
        } else {
            false
        }
    }
}

/// Messages outgoing from the Service Worker Manager thread to constellation
#[derive(Debug, Deserialize, Serialize)]
pub enum SWManagerMsg {
    /// Placeholder to keep the enum,
    /// as it will be needed when implementing
    /// <https://github.com/servo/servo/issues/24660>
    PostMessageToClient,
}