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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/config/gfxVars.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/config/gfxVars.cpp')
-rw-r--r--gfx/config/gfxVars.cpp125
1 files changed, 125 insertions, 0 deletions
diff --git a/gfx/config/gfxVars.cpp b/gfx/config/gfxVars.cpp
new file mode 100644
index 000000000..6b41d29c9
--- /dev/null
+++ b/gfx/config/gfxVars.cpp
@@ -0,0 +1,125 @@
+/* -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set sts=2 ts=8 sw=2 tw=99 et: */
+/* 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 "gfxVars.h"
+#include "gfxVarReceiver.h"
+#include "mozilla/dom/ContentChild.h"
+
+namespace mozilla {
+namespace gfx {
+
+StaticAutoPtr<gfxVars> gfxVars::sInstance;
+StaticAutoPtr<nsTArray<gfxVars::VarBase*>> gfxVars::sVarList;
+
+void
+gfxVars::Initialize()
+{
+ if (sInstance) {
+ return;
+ }
+
+ // sVarList must be initialized first since it's used in the constructor for
+ // sInstance.
+ sVarList = new nsTArray<gfxVars::VarBase*>();
+ sInstance = new gfxVars;
+
+ // Like Preferences, we want content to synchronously get initial data on
+ // init. Note the GPU process is not handled here - it cannot send sync
+ // messages, so instead the initial data is pushed down.
+ if (XRE_IsContentProcess()) {
+ InfallibleTArray<GfxVarUpdate> vars;
+ dom::ContentChild::GetSingleton()->SendGetGfxVars(&vars);
+ for (const auto& var : vars) {
+ ApplyUpdate(var);
+ }
+ }
+}
+
+gfxVars::gfxVars()
+{
+}
+
+void
+gfxVars::Shutdown()
+{
+ sInstance = nullptr;
+ sVarList = nullptr;
+}
+
+/* static */ void
+gfxVars::ApplyUpdate(const GfxVarUpdate& aUpdate)
+{
+ // Only subprocesses receive updates and apply them locally.
+ MOZ_ASSERT(!XRE_IsParentProcess());
+ sVarList->ElementAt(aUpdate.index())->SetValue(aUpdate.value());
+}
+
+/* static */ void
+gfxVars::AddReceiver(gfxVarReceiver* aReceiver)
+{
+ MOZ_ASSERT(NS_IsMainThread());
+
+ // Don't double-add receivers, in case a broken content process sends two
+ // init messages.
+ if (!sInstance->mReceivers.Contains(aReceiver)) {
+ sInstance->mReceivers.AppendElement(aReceiver);
+ }
+}
+
+/* static */ void
+gfxVars::RemoveReceiver(gfxVarReceiver* aReceiver)
+{
+ MOZ_ASSERT(NS_IsMainThread());
+
+ if (sInstance) {
+ sInstance->mReceivers.RemoveElement(aReceiver);
+ }
+}
+
+/* static */ nsTArray<GfxVarUpdate>
+gfxVars::FetchNonDefaultVars()
+{
+ MOZ_ASSERT(NS_IsMainThread());
+ MOZ_ASSERT(sVarList);
+
+ nsTArray<GfxVarUpdate> updates;
+ for (size_t i = 0; i < sVarList->Length(); i++) {
+ VarBase* var = sVarList->ElementAt(i);
+ if (var->HasDefaultValue()) {
+ continue;
+ }
+
+ GfxVarValue value;
+ var->GetValue(&value);
+
+ updates.AppendElement(GfxVarUpdate(i, value));
+ }
+
+ return updates;
+}
+
+gfxVars::VarBase::VarBase()
+{
+ mIndex = gfxVars::sVarList->Length();
+ gfxVars::sVarList->AppendElement(this);
+}
+
+void
+gfxVars::NotifyReceivers(VarBase* aVar)
+{
+ MOZ_ASSERT(NS_IsMainThread());
+
+ GfxVarValue value;
+ aVar->GetValue(&value);
+
+ GfxVarUpdate update(aVar->Index(), value);
+ for (auto& receiver : mReceivers) {
+ receiver->OnVarChanged(update);
+ }
+}
+
+} // namespace gfx
+} // namespace mozilla