Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 213 insertions, 0 deletions

diff --git a/widget/windows/WinContentSystemParameters.cpp b/widget/windows/WinContentSystemParameters.cpp
new file mode 100644
index 0000000000..f15e9aa0cc
--- /dev/null
+++ b/widget/windows/WinContentSystemParameters.cpp
@@ -0,0 +1,213 @@
+/* -*- 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 "WinContentSystemParameters.h"
+#include "WinUtils.h"
+#include "nsUXThemeData.h"
+#include "mozilla/Mutex.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/ContentParent.h"
+
+namespace mozilla {
+namespace widget {
+using dom::SystemParameterKVPair;
+
+static_assert(uint8_t(SystemParameterId::Count) < 32,
+              "Too many SystemParameterId for "
+              "WinContentSystemParameters::Detail::validCachedValueBitfield");
+
+struct WinContentSystemParameters::Detail {
+  OffTheBooksMutex mutex{"WinContentSystemParameters::Detail::mutex"};
+  // A bitfield indicating which cached ids are valid
+  uint32_t validCachedValueBitfield{0};
+  bool cachedIsPerMonitorDPIAware{false};
+  float cachedSystemDPI{0.0f};
+  bool cachedFlatMenusEnabled{false};
+
+  // Almost-always true in Windows 7, always true starting in Windows 8
+  bool cachedIsAppThemed{true};
+};
+
+// static
+WinContentSystemParameters* WinContentSystemParameters::GetSingleton() {
+  static WinContentSystemParameters sInstance{};
+  return &sInstance;
+}
+
+WinContentSystemParameters::WinContentSystemParameters()
+    : mDetail(std::make_unique<Detail>()) {}
+
+WinContentSystemParameters::~WinContentSystemParameters() {}
+
+bool WinContentSystemParameters::IsPerMonitorDPIAware() {
+  MOZ_ASSERT(XRE_IsContentProcess());
+
+  OffTheBooksMutexAutoLock lock(mDetail->mutex);
+  MOZ_RELEASE_ASSERT(
+      IsCachedValueValid(SystemParameterId::IsPerMonitorDPIAware));
+  return mDetail->cachedIsPerMonitorDPIAware;
+}
+
+float WinContentSystemParameters::SystemDPI() {
+  MOZ_ASSERT(XRE_IsContentProcess());
+
+  OffTheBooksMutexAutoLock lock(mDetail->mutex);
+  MOZ_RELEASE_ASSERT(IsCachedValueValid(SystemParameterId::SystemDPI));
+  return mDetail->cachedSystemDPI;
+}
+
+bool WinContentSystemParameters::AreFlatMenusEnabled() {
+  MOZ_ASSERT(XRE_IsContentProcess());
+
+  OffTheBooksMutexAutoLock lock(mDetail->mutex);
+  MOZ_RELEASE_ASSERT(IsCachedValueValid(SystemParameterId::FlatMenusEnabled));
+  return mDetail->cachedFlatMenusEnabled;
+}
+
+bool WinContentSystemParameters::IsAppThemed() {
+  MOZ_ASSERT(XRE_IsContentProcess());
+
+  OffTheBooksMutexAutoLock lock(mDetail->mutex);
+  MOZ_RELEASE_ASSERT(IsCachedValueValid(SystemParameterId::IsAppThemed));
+  return mDetail->cachedIsAppThemed;
+}
+
+void WinContentSystemParameters::SetContentValueInternal(
+    const SystemParameterKVPair& aKVPair) {
+  MOZ_ASSERT(XRE_IsContentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+
+  MOZ_RELEASE_ASSERT(aKVPair.id() < uint8_t(SystemParameterId::Count));
+
+  SetCachedValueValid(SystemParameterId(aKVPair.id()), true);
+
+  mDetail->mutex.AssertCurrentThreadOwns();
+
+  switch (SystemParameterId(aKVPair.id())) {
+    case SystemParameterId::IsPerMonitorDPIAware:
+      mDetail->cachedIsPerMonitorDPIAware = aKVPair.value();
+      return;
+
+    case SystemParameterId::SystemDPI:
+      mDetail->cachedSystemDPI = aKVPair.value();
+      return;
+
+    case SystemParameterId::FlatMenusEnabled:
+      mDetail->cachedFlatMenusEnabled = aKVPair.value();
+      return;
+
+    case SystemParameterId::IsAppThemed:
+      mDetail->cachedIsAppThemed = aKVPair.value();
+      return;
+
+    case SystemParameterId::Count:
+      MOZ_CRASH("Invalid SystemParameterId");
+  }
+  MOZ_CRASH("Unhandled SystemParameterId");
+}
+
+void WinContentSystemParameters::SetContentValues(
+    const nsTArray<dom::SystemParameterKVPair>& values) {
+  MOZ_ASSERT(XRE_IsContentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+
+  OffTheBooksMutexAutoLock lock(mDetail->mutex);
+  for (auto& kvPair : values) {
+    SetContentValueInternal(kvPair);
+  }
+}
+
+bool WinContentSystemParameters::GetParentValueInternal(
+    SystemParameterId aId, SystemParameterKVPair* aKVPair) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(aKVPair);
+
+  aKVPair->id() = uint8_t(aId);
+
+  switch (aId) {
+    case SystemParameterId::IsPerMonitorDPIAware:
+      aKVPair->value() = WinUtils::IsPerMonitorDPIAware();
+      return true;
+
+    case SystemParameterId::SystemDPI:
+      aKVPair->value() = WinUtils::SystemDPI();
+      return true;
+
+    case SystemParameterId::FlatMenusEnabled:
+      aKVPair->value() = nsUXThemeData::AreFlatMenusEnabled();
+      return true;
+
+    case SystemParameterId::IsAppThemed:
+      aKVPair->value() = nsUXThemeData::IsAppThemed();
+      return true;
+
+    case SystemParameterId::Count:
+      MOZ_CRASH("Invalid SystemParameterId");
+  }
+  MOZ_CRASH("Unhandled SystemParameterId");
+}
+
+nsTArray<dom::SystemParameterKVPair>
+WinContentSystemParameters::GetParentValues() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  nsTArray<dom::SystemParameterKVPair> results;
+  for (uint8_t i = 0; i < uint8_t(SystemParameterId::Count); ++i) {
+    dom::SystemParameterKVPair kvPair{};
+    GetParentValueInternal(SystemParameterId(i), &kvPair);
+    results.AppendElement(std::move(kvPair));
+  }
+  return results;
+}
+
+void WinContentSystemParameters::OnThemeChanged() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  nsTArray<dom::SystemParameterKVPair> updates;
+
+  {
+    dom::SystemParameterKVPair kvPair{};
+    GetParentValueInternal(SystemParameterId::FlatMenusEnabled, &kvPair);
+    updates.AppendElement(std::move(kvPair));
+  }
+
+  {
+    dom::SystemParameterKVPair kvPair{};
+    GetParentValueInternal(SystemParameterId::IsAppThemed, &kvPair);
+    updates.AppendElement(std::move(kvPair));
+  }
+
+  nsTArray<dom::ContentParent*> contentProcesses{};
+  dom::ContentParent::GetAll(contentProcesses);
+  for (auto contentProcess : contentProcesses) {
+    Unused << contentProcess->SendUpdateSystemParameters(updates);
+  }
+}
+
+bool WinContentSystemParameters::IsCachedValueValid(SystemParameterId aId) {
+  MOZ_ASSERT(XRE_IsContentProcess());
+  MOZ_ASSERT(uint8_t(aId) < uint8_t(SystemParameterId::Count));
+  mDetail->mutex.AssertCurrentThreadOwns();
+  uint32_t mask = uint32_t(1) << uint8_t(aId);
+  return (mDetail->validCachedValueBitfield & mask) != 0;
+}
+
+void WinContentSystemParameters::SetCachedValueValid(SystemParameterId aId,
+                                                     bool aIsValid) {
+  MOZ_ASSERT(XRE_IsContentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(uint8_t(aId) < uint8_t(SystemParameterId::Count));
+  mDetail->mutex.AssertCurrentThreadOwns();
+  uint32_t mask = uint32_t(1) << uint8_t(aId);
+
+  if (aIsValid) {
+    mDetail->validCachedValueBitfield |= mask;
+  } else {
+    mDetail->validCachedValueBitfield &= ~mask;
+  }
+}
+
+}  // namespace widget
+}  // namespace mozilla