dom/vr/XRSystem.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_XRsystem_h_
   8 #define mozilla_dom_XRsystem_h_
   9
  10 #include "mozilla/DOMEventTargetHelper.h"
  11 #include "mozilla/dom/WebXRBinding.h"
  12 #include "nsContentPermissionHelper.h"
  13 #include "VRManagerChild.h"
  14
  15 #include "gfxVR.h"
  16
  17 namespace mozilla::dom {
  18
  19 struct XRSessionCreationOptions;
  20
  21 class IsSessionSupportedRequest {
  22  public:
  23   IsSessionSupportedRequest(XRSessionMode aSessionMode, Promise* aPromise)
  24       : mPromise(aPromise), mSessionMode(aSessionMode) {}
  25   NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(IsSessionSupportedRequest)
  26   NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(IsSessionSupportedRequest)
  27
  28   RefPtr<Promise> mPromise;
  29   XRSessionMode GetSessionMode() const;
  30
  31  private:
  32   ~IsSessionSupportedRequest() = default;
  33   XRSessionMode mSessionMode;
  34 };
  35
  36 class RequestSessionRequest {
  37  public:
  38   RequestSessionRequest(
  39       XRSessionMode aSessionMode, uint32_t aPresentationGroup,
  40       Promise* aPromise,
  41       const nsTArray<XRReferenceSpaceType>& aRequiredReferenceSpaceTypes,
  42       const nsTArray<XRReferenceSpaceType>& aOptionalReferenceSpaceTypes);
  43   NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(RequestSessionRequest)
  44   NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(RequestSessionRequest)
  45   RefPtr<Promise> mPromise;
  46
  47   bool ResolveSupport(
  48       const gfx::VRDisplayClient* aDisplay,
  49       nsTArray<XRReferenceSpaceType>& aEnabledReferenceSpaceTypes) const;
  50   bool IsImmersive() const;
  51   bool WantsHardware() const;
  52   bool NeedsHardware() const;
  53   XRSessionMode GetSessionMode() const;
  54   uint32_t GetPresentationGroup() const;
  55
  56  private:
  57   ~RequestSessionRequest() = default;
  58   XRSessionMode mSessionMode;
  59   uint32_t mPresentationGroup;
  60   nsTArray<XRReferenceSpaceType> mRequiredReferenceSpaceTypes;
  61   nsTArray<XRReferenceSpaceType> mOptionalReferenceSpaceTypes;
  62 };
  63
  64 class XRRequestSessionPermissionRequest final
  65     : public ContentPermissionRequestBase {
  66  public:
  67   NS_DECL_ISUPPORTS_INHERITED
  68   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(XRRequestSessionPermissionRequest,
  69                                            ContentPermissionRequestBase)
  70
  71   // nsIContentPermissionRequest
  72   NS_IMETHOD Cancel(void) override;
  73   NS_IMETHOD Allow(JS::Handle<JS::Value> choices) override;
  74
  75   using AllowCallback = std::function<void()>;
  76   using AllowAnySiteCallback = std::function<void()>;
  77   using CancelCallback = std::function<void()>;
  78
  79   static already_AddRefed<XRRequestSessionPermissionRequest> Create(
  80       nsPIDOMWindowInner* aWindow, AllowCallback&& aAllowCallback,
  81       AllowAnySiteCallback&& aAllowAnySiteCallback,
  82       CancelCallback&& aCancelCallback);
  83
  84   using AutoGrantDelayPromise = MozPromise<bool, bool, true>;
  85   RefPtr<AutoGrantDelayPromise> MaybeDelayAutomaticGrants();
  86
  87  private:
  88   XRRequestSessionPermissionRequest(
  89       nsPIDOMWindowInner* aWindow, nsIPrincipal* aNodePrincipal,
  90       AllowCallback&& aAllowCallback,
  91       AllowAnySiteCallback&& aAllowAnySiteCallback,
  92       CancelCallback&& aCancelCallback);
  93   ~XRRequestSessionPermissionRequest();
  94
  95   AllowCallback mAllowCallback;
  96   AllowAnySiteCallback mAllowAnySiteCallback;
  97   CancelCallback mCancelCallback;
  98   nsTArray<PermissionRequest> mPermissionRequests;
  99   bool mCallbackCalled;
 100 };
 101
 102 class XRSystem final : public DOMEventTargetHelper,
 103                        public gfx::VRManagerEventObserver {
 104  public:
 105   NS_DECL_ISUPPORTS_INHERITED
 106   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(XRSystem, DOMEventTargetHelper)
 107
 108   void Shutdown();
 109   void SessionEnded(XRSession* aSession);
 110   bool FeaturePolicyBlocked() const;
 111   bool OnXRPermissionRequestAllow();
 112   void OnXRPermissionRequestCancel();
 113   bool HasActiveImmersiveSession() const;
 114
 115   // WebIDL Boilerplate
 116   static already_AddRefed<XRSystem> Create(nsPIDOMWindowInner* aWindow);
 117   JSObject* WrapObject(JSContext* aCx,
 118                        JS::Handle<JSObject*> aGivenProto) override;
 119
 120   // WebIDL Members
 121   already_AddRefed<Promise> IsSessionSupported(XRSessionMode aMode,
 122                                                ErrorResult& aRv);
 123   already_AddRefed<Promise> RequestSession(JSContext* aCx, XRSessionMode aMode,
 124                                            const XRSessionInit& aOptions,
 125                                            CallerType aCallerType,
 126                                            ErrorResult& aRv);
 127   IMPL_EVENT_HANDLER(devicechange);
 128
 129   // VRManagerEventObserver interface
 130   void NotifyVRDisplayMounted(uint32_t aDisplayID) override;
 131   void NotifyVRDisplayUnmounted(uint32_t aDisplayID) override;
 132   void NotifyVRDisplayConnect(uint32_t aDisplayID) override;
 133   void NotifyVRDisplayDisconnect(uint32_t aDisplayID) override;
 134   void NotifyVRDisplayPresentChange(uint32_t aDisplayID) override;
 135   void NotifyPresentationGenerationChanged(uint32_t aDisplayID) override;
 136   void NotifyEnumerationCompleted() override;
 137   void NotifyDetectRuntimesCompleted() override;
 138   bool GetStopActivityStatus() const override;
 139
 140  private:
 141   explicit XRSystem(nsPIDOMWindowInner* aWindow);
 142   virtual ~XRSystem() = default;
 143   void ResolveIsSessionSupportedRequests();
 144   void ProcessSessionRequestsWaitingForRuntimeDetection();
 145   bool CancelHardwareRequest(RequestSessionRequest* aRequest);
 146   void QueueSessionRequestWithEnumeration(RequestSessionRequest* aRequest);
 147   void QueueSessionRequestWithoutEnumeration(RequestSessionRequest* aRequest);
 148   void ResolveSessionRequestsWithoutHardware();
 149   void ResolveSessionRequests(
 150       nsTArray<RefPtr<RequestSessionRequest>>& aRequests,
 151       const nsTArray<RefPtr<gfx::VRDisplayClient>>& aDisplays);
 152
 153   bool mShuttingDown;
 154   // https://immersive-web.github.io/webxr/#pending-immersive-session
 155   bool mPendingImmersiveSession;
 156   // https://immersive-web.github.io/webxr/#active-immersive-session
 157   RefPtr<XRSession> mActiveImmersiveSession;
 158   // https://immersive-web.github.io/webxr/#list-of-inline-sessions
 159   nsTArray<RefPtr<XRSession>> mInlineSessions;
 160
 161   bool mEnumerationInFlight;
 162
 163   nsTArray<RefPtr<IsSessionSupportedRequest>> mIsSessionSupportedRequests;
 164   nsTArray<RefPtr<RequestSessionRequest>>
 165       mRequestSessionRequestsWithoutHardware;
 166   nsTArray<RefPtr<RequestSessionRequest>>
 167       mRequestSessionRequestsWaitingForRuntimeDetection;
 168   nsTArray<RefPtr<RequestSessionRequest>>
 169       mRequestSessionRequestsWaitingForEnumeration;
 170 };
 171
 172 }  // namespace mozilla::dom
 173
 174 #endif  // mozilla_dom_XRsystem_h_