1 files changed, 236 insertions, 0 deletions
diff --git a/dom/media/autoplay/GVAutoplayPermissionRequest.cpp b/dom/media/autoplay/GVAutoplayPermissionRequest.cpp
new file mode 100644
index 0000000000..beb3fb59fc
--- /dev/null
+++ b/dom/media/autoplay/GVAutoplayPermissionRequest.cpp
@@ -0,0 +1,236 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "GVAutoplayPermissionRequest.h"
+
+#include "mozilla/dom/HTMLMediaElement.h"
+#include "mozilla/Logging.h"
+#include "mozilla/StaticPrefs_media.h"
+#include "nsGlobalWindowInner.h"
+
+mozilla::LazyLogModule gGVAutoplayRequestLog("GVAutoplay");
+
+namespace mozilla::dom {
+
+using RType = GVAutoplayRequestType;
+using RStatus = GVAutoplayRequestStatus;
+
+const char* ToGVRequestTypeStr(RType aType) {
+  switch (aType) {
+    case RType::eINAUDIBLE:
+      return "inaudible";
+    case RType::eAUDIBLE:
+      return "audible";
+    default:
+      MOZ_ASSERT_UNREACHABLE("Invalid request type.");
+      return "invalid";
+  }
+}
+
+const char* ToGVRequestStatusStr(RStatus aStatus) {
+  switch (aStatus) {
+    case RStatus::eUNKNOWN:
+      return "Unknown";
+    case RStatus::eALLOWED:
+      return "Allowed";
+    case RStatus::eDENIED:
+      return "Denied";
+    case RStatus::ePENDING:
+      return "Pending";
+    default:
+      MOZ_ASSERT_UNREACHABLE("Invalid status.");
+      return "Invalid";
+  }
+}
+
+// avoid redefined macro in unified build
+#undef REQUEST_LOG
+#define REQUEST_LOG(msg, ...)                                          \
+  if (MOZ_LOG_TEST(gGVAutoplayRequestLog, mozilla::LogLevel::Debug)) { \
+    MOZ_LOG(gGVAutoplayRequestLog, LogLevel::Debug,                    \
+            ("Request=%p, Type=%s, " msg, this,                        \
+             ToGVRequestTypeStr(this->mType), ##__VA_ARGS__));         \
+  }
+
+#undef LOG
+#define LOG(msg, ...) \
+  MOZ_LOG(gGVAutoplayRequestLog, LogLevel::Debug, (msg, ##__VA_ARGS__))
+
+static RStatus GetRequestStatus(BrowsingContext* aContext, RType aType) {
+  MOZ_ASSERT(aContext);
+  AssertIsOnMainThread();
+  return aType == RType::eAUDIBLE
+             ? aContext->GetGVAudibleAutoplayRequestStatus()
+             : aContext->GetGVInaudibleAutoplayRequestStatus();
+}
+
+// This is copied from the value of `media.geckoview.autoplay.request.testing`.
+enum class TestRequest : uint32_t {
+  ePromptAsNormal = 0,
+  eAllowAll = 1,
+  eDenyAll = 2,
+  eAllowAudible = 3,
+  eDenyAudible = 4,
+  eAllowInAudible = 5,
+  eDenyInAudible = 6,
+  eLeaveAllPending = 7,
+};
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(GVAutoplayPermissionRequest,
+                                   ContentPermissionRequestBase)
+
+NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(GVAutoplayPermissionRequest,
+                                               ContentPermissionRequestBase)
+
+/* static */
+void GVAutoplayPermissionRequest::CreateRequest(nsGlobalWindowInner* aWindow,
+                                                BrowsingContext* aContext,
+                                                GVAutoplayRequestType aType) {
+  RefPtr<GVAutoplayPermissionRequest> request =
+      new GVAutoplayPermissionRequest(aWindow, aContext, aType);
+  request->SetRequestStatus(RStatus::ePENDING);
+  const TestRequest testingPref = static_cast<TestRequest>(
+      StaticPrefs::media_geckoview_autoplay_request_testing());
+  if (testingPref != TestRequest::ePromptAsNormal) {
+    LOG("Create testing request, tesing value=%u",
+        static_cast<uint32_t>(testingPref));
+    if (testingPref == TestRequest::eAllowAll ||
+        (testingPref == TestRequest::eAllowAudible &&
+         aType == RType::eAUDIBLE) ||
+        (testingPref == TestRequest::eAllowInAudible &&
+         aType == RType::eINAUDIBLE)) {
+      request->Allow(JS::UndefinedHandleValue);
+    } else if (testingPref == TestRequest::eDenyAll ||
+               (testingPref == TestRequest::eDenyAudible &&
+                aType == RType::eAUDIBLE) ||
+               (testingPref == TestRequest::eDenyInAudible &&
+                aType == RType::eINAUDIBLE)) {
+      request->Cancel();
+    }
+  } else {
+    LOG("Dispatch async request");
+    request->RequestDelayedTask(
+        aWindow->SerialEventTarget(),
+        GVAutoplayPermissionRequest::DelayedTaskType::Request);
+  }
+}
+
+GVAutoplayPermissionRequest::GVAutoplayPermissionRequest(
+    nsGlobalWindowInner* aWindow, BrowsingContext* aContext, RType aType)
+    : ContentPermissionRequestBase(aWindow->GetPrincipal(), aWindow,
+                                   ""_ns,  // No testing pref used in this class
+                                   aType == RType::eAUDIBLE
+                                       ? "autoplay-media-audible"_ns
+                                       : "autoplay-media-inaudible"_ns),
+      mType(aType),
+      mContext(aContext) {
+  MOZ_ASSERT(mContext);
+  REQUEST_LOG("Request created");
+}
+
+GVAutoplayPermissionRequest::~GVAutoplayPermissionRequest() {
+  REQUEST_LOG("Request destroyed");
+  // If user doesn't response to the request before it gets destroyed (ex.
+  // request dismissed, tab closed, naviagation to a new page), then we should
+  // treat it as a denial.
+  if (mContext) {
+    Cancel();
+  }
+}
+
+void GVAutoplayPermissionRequest::SetRequestStatus(RStatus aStatus) {
+  REQUEST_LOG("SetRequestStatus, new status=%s", ToGVRequestStatusStr(aStatus));
+  MOZ_ASSERT(mContext);
+  AssertIsOnMainThread();
+  if (mType == RType::eAUDIBLE) {
+    // Return value of setting synced field should be checked. See bug 1656492.
+    Unused << mContext->SetGVAudibleAutoplayRequestStatus(aStatus);
+  } else {
+    // Return value of setting synced field should be checked. See bug 1656492.
+    Unused << mContext->SetGVInaudibleAutoplayRequestStatus(aStatus);
+  }
+}
+
+NS_IMETHODIMP
+GVAutoplayPermissionRequest::Cancel() {
+  MOZ_ASSERT(mContext, "Do not call 'Cancel()' twice!");
+  // As the process of replying of the request is an async task, the status
+  // might have be reset at the time we get the result from parent process.
+  // Ex. if the page got closed or naviagated immediately after user replied to
+  // the request. Therefore, the status should be either `pending` or `unknown`.
+  const RStatus status = GetRequestStatus(mContext, mType);
+  REQUEST_LOG("Cancel, current status=%s", ToGVRequestStatusStr(status));
+  MOZ_ASSERT(status == RStatus::ePENDING || status == RStatus::eUNKNOWN);
+  if ((status == RStatus::ePENDING) && !mContext->IsDiscarded()) {
+    SetRequestStatus(RStatus::eDENIED);
+  }
+  mContext = nullptr;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GVAutoplayPermissionRequest::Allow(JS::Handle<JS::Value> aChoices) {
+  MOZ_ASSERT(mContext, "Do not call 'Allow()' twice!");
+  // As the process of replying of the request is an async task, the status
+  // might have be reset at the time we get the result from parent process.
+  // Ex. if the page got closed or naviagated immediately after user replied to
+  // the request. Therefore, the status should be either `pending` or `unknown`.
+  const RStatus status = GetRequestStatus(mContext, mType);
+  REQUEST_LOG("Allow, current status=%s", ToGVRequestStatusStr(status));
+  MOZ_ASSERT(status == RStatus::ePENDING || status == RStatus::eUNKNOWN);
+  if (status == RStatus::ePENDING) {
+    SetRequestStatus(RStatus::eALLOWED);
+  }
+  mContext = nullptr;
+  return NS_OK;
+}
+
+/* static */
+void GVAutoplayPermissionRequestor::AskForPermissionIfNeeded(
+    nsPIDOMWindowInner* aWindow) {
+  LOG("Requestor, AskForPermissionIfNeeded");
+  if (!aWindow) {
+    return;
+  }
+
+  // The request is used for content permission, so it's no need to create a
+  // content request in parent process if we're in e10s.
+  if (XRE_IsE10sParentProcess()) {
+    return;
+  }
+
+  if (!StaticPrefs::media_geckoview_autoplay_request()) {
+    return;
+  }
+
+  LOG("Requestor, check status to decide if we need to create the new request");
+  // The request status is stored in top-level browsing context only.
+  RefPtr<BrowsingContext> context = aWindow->GetBrowsingContext()->Top();
+  if (!HasEverAskForRequest(context, RType::eAUDIBLE)) {
+    CreateAsyncRequest(aWindow, context, RType::eAUDIBLE);
+  }
+  if (!HasEverAskForRequest(context, RType::eINAUDIBLE)) {
+    CreateAsyncRequest(aWindow, context, RType::eINAUDIBLE);
+  }
+}
+
+/* static */
+bool GVAutoplayPermissionRequestor::HasEverAskForRequest(
+    BrowsingContext* aContext, RType aType) {
+  return GetRequestStatus(aContext, aType) != RStatus::eUNKNOWN;
+}
+
+/* static */
+void GVAutoplayPermissionRequestor::CreateAsyncRequest(
+    nsPIDOMWindowInner* aWindow, BrowsingContext* aContext,
+    GVAutoplayRequestType aType) {
+  nsGlobalWindowInner* innerWindow = nsGlobalWindowInner::Cast(aWindow);
+  if (!innerWindow || !innerWindow->GetPrincipal()) {
+    return;
+  }
+
+  GVAutoplayPermissionRequest::CreateRequest(innerWindow, aContext, aType);
+}
+
+}  // namespace mozilla::dom