1 files changed, 55 insertions, 0 deletions
diff --git a/dom/ipc/EffectsInfo.h b/dom/ipc/EffectsInfo.h
new file mode 100644
index 0000000000..e7bcbb1184
--- /dev/null
+++ b/dom/ipc/EffectsInfo.h
@@ -0,0 +1,55 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_EffectsInfo_h
+#define mozilla_dom_EffectsInfo_h
+
+#include "nsRect.h"
+
+namespace mozilla {
+namespace dom {
+
+/**
+ * An EffectsInfo contains information for a remote browser about the graphical
+ * effects that are being applied to it by ancestor browsers in different
+ * processes.
+ */
+class EffectsInfo {
+ public:
+  EffectsInfo() { *this = EffectsInfo::FullyHidden(); }
+
+  static EffectsInfo VisibleWithinRect(const nsRect& aVisibleRect,
+                                       float aScaleX, float aScaleY) {
+    return EffectsInfo{aVisibleRect, aScaleX, aScaleY};
+  }
+  static EffectsInfo FullyHidden() { return EffectsInfo{nsRect(), 1.0f, 1.0f}; }
+
+  bool operator==(const EffectsInfo& aOther) {
+    return mVisibleRect == aOther.mVisibleRect && mScaleX == aOther.mScaleX &&
+           mScaleY == aOther.mScaleY;
+  }
+  bool operator!=(const EffectsInfo& aOther) { return !(*this == aOther); }
+
+  bool IsVisible() const { return !mVisibleRect.IsEmpty(); }
+
+  // The visible rect of this browser relative to the root frame. If this is
+  // empty then the browser can be considered invisible.
+  nsRect mVisibleRect;
+  // The desired scale factors to apply to rasterized content to match
+  // transforms applied in ancestor browsers.
+  float mScaleX;
+  float mScaleY;
+  // If you add new fields here, you must also update operator==
+
+ private:
+  EffectsInfo(const nsRect& aVisibleRect, float aScaleX, float aScaleY)
+      : mVisibleRect(aVisibleRect), mScaleX(aScaleX), mScaleY(aScaleY) {}
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_dom_EffectsInfo_h