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-rw-r--r--gfx/config/gfxFeature.cpp307
1 files changed, 307 insertions, 0 deletions
diff --git a/gfx/config/gfxFeature.cpp b/gfx/config/gfxFeature.cpp
new file mode 100644
index 0000000000..71517e563c
--- /dev/null
+++ b/gfx/config/gfxFeature.cpp
@@ -0,0 +1,307 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "gfxFeature.h"
+
+#include "mozilla/Preferences.h"
+#include "mozilla/Sprintf.h"
+#include "nsString.h"
+
+namespace mozilla {
+namespace gfx {
+
+bool FeatureState::IsEnabled() const {
+ return IsInitialized() && IsFeatureStatusSuccess(GetValue());
+}
+
+FeatureStatus FeatureState::GetValue() const {
+ if (!IsInitialized()) {
+ return FeatureStatus::Unused;
+ }
+
+ if (mRuntime.mStatus != FeatureStatus::Unused) {
+ return mRuntime.mStatus;
+ }
+ if (mUser.mStatus == FeatureStatus::ForceEnabled) {
+ return FeatureStatus::ForceEnabled;
+ }
+ if (mEnvironment.mStatus != FeatureStatus::Unused) {
+ return mEnvironment.mStatus;
+ }
+ if (mUser.mStatus != FeatureStatus::Unused) {
+ return mUser.mStatus;
+ }
+ return mDefault.mStatus;
+}
+
+bool FeatureState::SetDefault(bool aEnable, FeatureStatus aDisableStatus,
+ const char* aDisableMessage) {
+ if (!aEnable) {
+ DisableByDefault(aDisableStatus, aDisableMessage,
+ "FEATURE_FAILURE_DISABLED"_ns);
+ return false;
+ }
+ EnableByDefault();
+ return true;
+}
+
+void FeatureState::SetDefaultFromPref(const char* aPrefName, bool aIsEnablePref,
+ bool aDefaultValue,
+ Maybe<bool> aUserValue) {
+ bool baseValue =
+ Preferences::GetBool(aPrefName, aDefaultValue, PrefValueKind::Default);
+ SetDefault(baseValue == aIsEnablePref, FeatureStatus::Disabled,
+ "Disabled by default");
+
+ if (aUserValue) {
+ if (*aUserValue == aIsEnablePref) {
+ nsCString message("Enabled via ");
+ message.AppendASCII(aPrefName);
+ UserEnable(message.get());
+ } else {
+ nsCString message("Disabled via ");
+ message.AppendASCII(aPrefName);
+ UserDisable(message.get(), "FEATURE_FAILURE_PREF_OFF"_ns);
+ }
+ }
+}
+
+void FeatureState::SetDefaultFromPref(const char* aPrefName, bool aIsEnablePref,
+ bool aDefaultValue) {
+ Maybe<bool> userValue;
+ if (Preferences::HasUserValue(aPrefName)) {
+ userValue.emplace(Preferences::GetBool(aPrefName, aDefaultValue));
+ }
+
+ SetDefaultFromPref(aPrefName, aIsEnablePref, aDefaultValue, userValue);
+}
+
+bool FeatureState::InitOrUpdate(bool aEnable, FeatureStatus aDisableStatus,
+ const char* aDisableMessage) {
+ if (!IsInitialized()) {
+ return SetDefault(aEnable, aDisableStatus, aDisableMessage);
+ }
+ return MaybeSetFailed(aEnable, aDisableStatus, aDisableMessage, nsCString());
+}
+
+void FeatureState::UserEnable(const char* aMessage) {
+ AssertInitialized();
+ SetUser(FeatureStatus::Available, aMessage, nsCString());
+}
+
+void FeatureState::UserForceEnable(const char* aMessage) {
+ AssertInitialized();
+ SetUser(FeatureStatus::ForceEnabled, aMessage, nsCString());
+}
+
+void FeatureState::UserDisable(const char* aMessage,
+ const nsACString& aFailureId) {
+ AssertInitialized();
+ SetUser(FeatureStatus::Disabled, aMessage, aFailureId);
+}
+
+void FeatureState::Disable(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ AssertInitialized();
+
+ // We should never bother setting an environment status to "enabled," since
+ // it could override an explicit user decision to disable it.
+ MOZ_ASSERT(IsFeatureStatusFailure(aStatus));
+
+ SetEnvironment(aStatus, aMessage, aFailureId);
+}
+
+void FeatureState::SetFailed(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ AssertInitialized();
+
+ // We should never bother setting a runtime status to "enabled," since it
+ // could override an explicit user decision to disable it.
+ MOZ_ASSERT(IsFeatureStatusFailure(aStatus));
+
+ SetRuntime(aStatus, aMessage, aFailureId);
+}
+
+bool FeatureState::MaybeSetFailed(bool aEnable, FeatureStatus aStatus,
+ const char* aMessage,
+ const nsACString& aFailureId) {
+ if (!aEnable) {
+ SetFailed(aStatus, aMessage, aFailureId);
+ return false;
+ }
+ return true;
+}
+
+bool FeatureState::MaybeSetFailed(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ return MaybeSetFailed(IsFeatureStatusSuccess(aStatus), aStatus, aMessage,
+ aFailureId);
+}
+
+bool FeatureState::DisabledByDefault() const {
+ return mDefault.mStatus != FeatureStatus::Available;
+}
+
+bool FeatureState::IsForcedOnByUser() const {
+ AssertInitialized();
+ return mUser.mStatus == FeatureStatus::ForceEnabled;
+}
+
+void FeatureState::EnableByDefault() {
+ // User/runtime decisions should not have been made yet.
+ MOZ_ASSERT(!mUser.IsInitialized());
+ MOZ_ASSERT(!mEnvironment.IsInitialized());
+ MOZ_ASSERT(!mRuntime.IsInitialized());
+
+ mDefault.Set(FeatureStatus::Available);
+}
+
+void FeatureState::DisableByDefault(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ // User/runtime decisions should not have been made yet.
+ MOZ_ASSERT(!mUser.IsInitialized());
+ MOZ_ASSERT(!mEnvironment.IsInitialized());
+ MOZ_ASSERT(!mRuntime.IsInitialized());
+
+ // Make sure that when disabling we actually use a failure status.
+ MOZ_ASSERT(IsFeatureStatusFailure(aStatus));
+
+ mDefault.Set(aStatus, aMessage, aFailureId);
+}
+
+void FeatureState::SetUser(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ // Default decision must have been made, but not runtime or environment.
+ MOZ_ASSERT(mDefault.IsInitialized());
+ MOZ_ASSERT(!mEnvironment.IsInitialized());
+ MOZ_ASSERT(!mRuntime.IsInitialized());
+
+ mUser.Set(aStatus, aMessage, aFailureId);
+}
+
+void FeatureState::SetEnvironment(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ // Default decision must have been made, but not runtime.
+ MOZ_ASSERT(mDefault.IsInitialized());
+ MOZ_ASSERT(!mRuntime.IsInitialized());
+
+ mEnvironment.Set(aStatus, aMessage, aFailureId);
+}
+
+void FeatureState::SetRuntime(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ AssertInitialized();
+
+ mRuntime.Set(aStatus, aMessage, aFailureId);
+}
+
+const char* FeatureState::GetRuntimeMessage() const {
+ MOZ_ASSERT(IsFeatureStatusFailure(mRuntime.mStatus));
+ return mRuntime.mMessage;
+}
+
+void FeatureState::ForEachStatusChange(
+ const StatusIterCallback& aCallback) const {
+ AssertInitialized();
+
+ aCallback("default", mDefault.mStatus, mDefault.MessageOrNull(),
+ mDefault.FailureId());
+ if (mUser.IsInitialized()) {
+ aCallback("user", mUser.mStatus, mUser.Message(), mUser.FailureId());
+ }
+ if (mEnvironment.IsInitialized()) {
+ aCallback("env", mEnvironment.mStatus, mEnvironment.Message(),
+ mEnvironment.FailureId());
+ }
+ if (mRuntime.IsInitialized()) {
+ aCallback("runtime", mRuntime.mStatus, mRuntime.Message(),
+ mRuntime.FailureId());
+ }
+}
+
+const char* FeatureState::GetFailureMessage() const {
+ AssertInitialized();
+ MOZ_ASSERT(!IsEnabled());
+
+ if (mRuntime.mStatus != FeatureStatus::Unused &&
+ IsFeatureStatusFailure(mRuntime.mStatus)) {
+ return mRuntime.mMessage;
+ }
+ if (mEnvironment.mStatus != FeatureStatus::Unused &&
+ IsFeatureStatusFailure(mEnvironment.mStatus)) {
+ return mEnvironment.mMessage;
+ }
+ if (mUser.mStatus != FeatureStatus::Unused &&
+ IsFeatureStatusFailure(mUser.mStatus)) {
+ return mUser.mMessage;
+ }
+
+ MOZ_ASSERT(IsFeatureStatusFailure(mDefault.mStatus));
+ return mDefault.mMessage;
+}
+
+const nsCString& FeatureState::GetFailureId() const {
+ MOZ_ASSERT(!IsEnabled());
+
+ if (mRuntime.mStatus != FeatureStatus::Unused) {
+ return mRuntime.mFailureId;
+ }
+ if (mEnvironment.mStatus != FeatureStatus::Unused) {
+ return mEnvironment.mFailureId;
+ }
+ if (mUser.mStatus != FeatureStatus::Unused) {
+ return mUser.mFailureId;
+ }
+
+ return mDefault.mFailureId;
+}
+
+nsCString FeatureState::GetStatusAndFailureIdString() const {
+ nsCString status;
+ auto value = GetValue();
+ switch (value) {
+ case FeatureStatus::Blocklisted:
+ case FeatureStatus::Disabled:
+ case FeatureStatus::Unavailable:
+ case FeatureStatus::UnavailableNoAngle:
+ case FeatureStatus::Blocked:
+ status.AppendPrintf("%s:%s", FeatureStatusToString(value),
+ GetFailureId().get());
+ break;
+ default:
+ status.Append(FeatureStatusToString(value));
+ break;
+ }
+
+ return status;
+}
+
+void FeatureState::Reset() {
+ mDefault.Set(FeatureStatus::Unused);
+ mUser.Set(FeatureStatus::Unused);
+ mEnvironment.Set(FeatureStatus::Unused);
+ mRuntime.Set(FeatureStatus::Unused);
+}
+
+void FeatureState::Instance::Set(FeatureStatus aStatus) {
+ mStatus = aStatus;
+ mMessage[0] = '\0';
+ mFailureId.Truncate();
+}
+
+void FeatureState::Instance::Set(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ mStatus = aStatus;
+ if (aMessage) {
+ SprintfLiteral(mMessage, "%s", aMessage);
+ } else {
+ mMessage[0] = '\0';
+ }
+ mFailureId.Assign(aFailureId);
+}
+
+} // namespace gfx
+} // namespace mozilla