import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

widget/PluginWidgetProxy.h

@@ -0,0 +1,78 @@
+/* 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_widget_RemotePlugin_h__
+#define mozilla_widget_RemotePlugin_h__
+
+#include "PuppetWidget.h"
+#include "mozilla/dom/TabChild.h"
+
+/*
+ * PluginWidgetProxy is a nsIWidget wrapper we hand around in plugin and layout
+ * code. It wraps a native widget it creates in the chrome process. Since this
+ * is for plugins, only a limited set of the widget apis need to be overridden,
+ * the rest of the implementation is in PuppetWidget or nsBaseWidget.
+ */
+
+namespace mozilla {
+namespace plugins {
+class PluginWidgetChild;
+} // namespace plugins
+namespace widget {
+
+class PluginWidgetProxy final : public PuppetWidget
+{
+public:
+  explicit PluginWidgetProxy(dom::TabChild* aTabChild,
+                             mozilla::plugins::PluginWidgetChild* aChannel);
+
+protected:
+  virtual ~PluginWidgetProxy();
+
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsIWidget
+  using PuppetWidget::Create; // for Create signature not overridden here
+  virtual MOZ_MUST_USE nsresult Create(nsIWidget* aParent,
+                                       nsNativeWidget aNativeParent,
+                                       const LayoutDeviceIntRect& aRect,
+                                       nsWidgetInitData* aInitData = nullptr)
+                                       override;
+  virtual void Destroy() override;
+  NS_IMETHOD SetFocus(bool aRaise = false) override;
+  NS_IMETHOD SetParent(nsIWidget* aNewParent) override;
+
+  virtual nsIWidget* GetParent(void) override;
+  virtual void* GetNativeData(uint32_t aDataType) override;
+#if defined(XP_WIN)
+  void SetNativeData(uint32_t aDataType, uintptr_t aVal) override;
+#endif
+  virtual nsTransparencyMode GetTransparencyMode() override
+  { return eTransparencyOpaque; }
+  virtual void GetWindowClipRegion(nsTArray<LayoutDeviceIntRect>* aRects) override;
+
+public:
+  /**
+   * When tabs are closed PPluginWidget can terminate before plugin code is
+   * finished tearing us down. When this happens plugin calls over mActor
+   * fail triggering an abort in the content process. To protect against this
+   * the connection tells us when it is torn down here so we can avoid making
+   * calls while content finishes tearing us down.
+   */
+  void ChannelDestroyed() { mActor = nullptr; }
+
+private:
+  // Our connection with the chrome widget, created on PBrowser.
+  mozilla::plugins::PluginWidgetChild* mActor;
+  // PuppetWidget does not implement parent apis, but we need
+  // them for plugin widgets.
+  nsCOMPtr<nsIWidget> mParent;
+  uintptr_t mCachedPluginPort;
+};
+
+} // namespace widget
+} // namespace mozilla
+
+#endif