Add m-esr52 at 52.6.0

11 files changed, 1282 insertions, 0 deletions

diff --git a/dom/plugins/ipc/hangui/HangUIDlg.h b/dom/plugins/ipc/hangui/HangUIDlg.h
new file mode 100644
index 000000000..47339acc2
--- /dev/null
+++ b/dom/plugins/ipc/hangui/HangUIDlg.h
@@ -0,0 +1,18 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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_plugins_HangUIDlg_h
+#define mozilla_plugins_HangUIDlg_h
+
+#define IDD_HANGUIDLG                   102
+#define IDC_MSG                         1000
+#define IDC_CONTINUE                    1001
+#define IDC_STOP                        1002
+#define IDC_NOFUTURE                    1003
+#define IDC_DLGICON                     1004
+
+#endif // mozilla_plugins_HangUIDlg_h
+
diff --git a/dom/plugins/ipc/hangui/HangUIDlg.rc b/dom/plugins/ipc/hangui/HangUIDlg.rc
new file mode 100644
index 000000000..62e98ca24
--- /dev/null
+++ b/dom/plugins/ipc/hangui/HangUIDlg.rc
@@ -0,0 +1,26 @@
+/* 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 "HangUIDlg.h"
+#include <windows.h>
+
+LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Dialog
+//
+
+IDD_HANGUIDLG DIALOGEX 0, 0, 400, 75
+STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Dialog"
+FONT 8, "MS Shell Dlg", 400, 0, 0x1
+BEGIN
+    DEFPUSHBUTTON   "Continue",IDC_CONTINUE,283,51,50,18
+    PUSHBUTTON      "Stop",IDC_STOP,341,51,50,18
+    CONTROL         "Check1",IDC_NOFUTURE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,37,32,354,10
+    LTEXT           "Static",IDC_MSG,37,7,353,24
+    ICON            "",IDC_DLGICON,7,7,20,20
+END
+
diff --git a/dom/plugins/ipc/hangui/MiniShmBase.h b/dom/plugins/ipc/hangui/MiniShmBase.h
new file mode 100644
index 000000000..0ac8840dd
--- /dev/null
+++ b/dom/plugins/ipc/hangui/MiniShmBase.h
@@ -0,0 +1,334 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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_plugins_MiniShmBase_h
+#define mozilla_plugins_MiniShmBase_h
+
+#include "base/basictypes.h"
+
+#include "nsDebug.h"
+
+#include <windows.h>
+
+namespace mozilla {
+namespace plugins {
+
+/**
+ * This class is used to provide RAII semantics for mapped views.
+ * @see ScopedHandle
+ */
+class ScopedMappedFileView
+{
+public:
+  explicit
+  ScopedMappedFileView(LPVOID aView)
+    : mView(aView)
+  {
+  }
+
+  ~ScopedMappedFileView()
+  {
+    Close();
+  }
+
+  void
+  Close()
+  {
+    if (mView) {
+      ::UnmapViewOfFile(mView);
+      mView = nullptr;
+    }
+  }
+
+  void
+  Set(LPVOID aView)
+  {
+    Close();
+    mView = aView;
+  }
+
+  LPVOID
+  Get() const
+  {
+    return mView;
+  }
+
+  LPVOID
+  Take()
+  {
+    LPVOID result = mView;
+    mView = nullptr;
+    return result;
+  }
+
+  operator LPVOID()
+  {
+    return mView;
+  }
+
+  bool
+  IsValid() const
+  {
+    return (mView);
+  }
+
+private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedMappedFileView);
+
+  LPVOID mView;
+};
+
+class MiniShmBase;
+
+class MiniShmObserver
+{
+public:
+  /**
+   * This function is called whenever there is a new shared memory request.
+   * @param aMiniShmObj MiniShmBase object that may be used to read and 
+   *                    write from shared memory.
+   */
+  virtual void OnMiniShmEvent(MiniShmBase *aMiniShmObj) = 0;
+  /**
+   * This function is called once when a MiniShmParent and a MiniShmChild
+   * object have successfully negotiated a connection.
+   *
+   * @param aMiniShmObj MiniShmBase object that may be used to read and 
+   *                    write from shared memory.
+   */
+  virtual void OnMiniShmConnect(MiniShmBase *aMiniShmObj) { }
+};
+
+/**
+ * Base class for MiniShm connections. This class defines the common 
+ * interfaces and code between parent and child.
+ */
+class MiniShmBase
+{
+public:
+  /**
+   * Obtains a writable pointer into shared memory of type T.
+   * typename T must be plain-old-data and contain an unsigned integral 
+   * member T::identifier that uniquely identifies T with respect to 
+   * other types used by the protocol being implemented.
+   *
+   * @param aPtr Pointer to receive the shared memory address.
+   *             This value is set if and only if the function 
+   *             succeeded.
+   * @return NS_OK if and only if aPtr was successfully obtained.
+   *         NS_ERROR_ILLEGAL_VALUE if type T is not valid for MiniShm.
+   *         NS_ERROR_NOT_INITIALIZED if there is no valid MiniShm connection.
+   *         NS_ERROR_NOT_AVAILABLE if the memory is not safe to write.
+   */
+  template<typename T> nsresult
+  GetWritePtr(T*& aPtr)
+  {
+    if (!mWriteHeader || !mGuard) {
+      return NS_ERROR_NOT_INITIALIZED;
+    }
+    if (sizeof(T) > mPayloadMaxLen ||
+        T::identifier <= RESERVED_CODE_LAST) {
+      return NS_ERROR_ILLEGAL_VALUE;
+    }
+    if (::WaitForSingleObject(mGuard, mTimeout) != WAIT_OBJECT_0) {
+      return NS_ERROR_NOT_AVAILABLE;
+    }
+    mWriteHeader->mId = T::identifier;
+    mWriteHeader->mPayloadLen = sizeof(T);
+    aPtr = reinterpret_cast<T*>(mWriteHeader + 1);
+    return NS_OK;
+  }
+
+  /**
+   * Obtains a readable pointer into shared memory of type T.
+   * typename T must be plain-old-data and contain an unsigned integral 
+   * member T::identifier that uniquely identifies T with respect to 
+   * other types used by the protocol being implemented.
+   *
+   * @param aPtr Pointer to receive the shared memory address.
+   *             This value is set if and only if the function 
+   *             succeeded.
+   * @return NS_OK if and only if aPtr was successfully obtained.
+   *         NS_ERROR_ILLEGAL_VALUE if type T is not valid for MiniShm or if
+   *                                type T does not match the type of the data
+   *                                stored in shared memory.
+   *         NS_ERROR_NOT_INITIALIZED if there is no valid MiniShm connection.
+   */
+  template<typename T> nsresult
+  GetReadPtr(const T*& aPtr)
+  {
+    if (!mReadHeader) {
+      return NS_ERROR_NOT_INITIALIZED;
+    }
+    if (mReadHeader->mId != T::identifier ||
+        sizeof(T) != mReadHeader->mPayloadLen) {
+      return NS_ERROR_ILLEGAL_VALUE;
+    }
+    aPtr = reinterpret_cast<const T*>(mReadHeader + 1);
+    return NS_OK;
+  }
+
+  /**
+   * Fires the peer's event causing its request handler to execute.
+   *
+   * @return Should return NS_OK if the send was successful.
+   */
+  virtual nsresult
+  Send() = 0;
+
+protected:
+  /**
+   * MiniShm reserves some identifier codes for its own use. Any 
+   * identifiers used by MiniShm protocol implementations must be 
+   * greater than RESERVED_CODE_LAST.
+   */
+  enum ReservedCodes
+  {
+    RESERVED_CODE_INIT = 0,
+    RESERVED_CODE_INIT_COMPLETE = 1,
+    RESERVED_CODE_LAST = RESERVED_CODE_INIT_COMPLETE
+  };
+
+  struct MiniShmHeader
+  {
+    unsigned int  mId;
+    unsigned int  mPayloadLen;
+  };
+
+  struct MiniShmInit
+  {
+    enum identifier_t
+    {
+      identifier = RESERVED_CODE_INIT
+    };
+    HANDLE    mParentEvent;
+    HANDLE    mParentGuard;
+    HANDLE    mChildEvent;
+    HANDLE    mChildGuard;
+  };
+
+  struct MiniShmInitComplete
+  {
+    enum identifier_t
+    {
+      identifier = RESERVED_CODE_INIT_COMPLETE
+    };
+    bool      mSucceeded;
+  };
+
+  MiniShmBase()
+    : mObserver(nullptr),
+      mWriteHeader(nullptr),
+      mReadHeader(nullptr),
+      mPayloadMaxLen(0),
+      mGuard(nullptr),
+      mTimeout(INFINITE)
+  {
+  }
+  virtual ~MiniShmBase()
+  { }
+
+  virtual void
+  OnEvent()
+  {
+    if (mObserver) {
+      mObserver->OnMiniShmEvent(this);
+    }
+  }
+
+  virtual void
+  OnConnect()
+  {
+    if (mObserver) {
+      mObserver->OnMiniShmConnect(this);
+    }
+  }
+
+  nsresult
+  SetView(LPVOID aView, const unsigned int aSize, bool aIsChild)
+  {
+    if (!aView || aSize <= 2 * sizeof(MiniShmHeader)) {
+      return NS_ERROR_ILLEGAL_VALUE;
+    }
+    // Divide the region into halves for parent and child
+    if (aIsChild) {
+      mReadHeader = static_cast<MiniShmHeader*>(aView);
+      mWriteHeader = reinterpret_cast<MiniShmHeader*>(static_cast<char*>(aView)
+                                                      + aSize / 2U);
+    } else {
+      mWriteHeader = static_cast<MiniShmHeader*>(aView);
+      mReadHeader = reinterpret_cast<MiniShmHeader*>(static_cast<char*>(aView)
+                                                     + aSize / 2U);
+    }
+    mPayloadMaxLen = aSize / 2U - sizeof(MiniShmHeader);
+    return NS_OK;
+  }
+
+  nsresult
+  SetGuard(HANDLE aGuard, DWORD aTimeout)
+  {
+    if (!aGuard || !aTimeout) {
+      return NS_ERROR_ILLEGAL_VALUE;
+    }
+    mGuard = aGuard;
+    mTimeout = aTimeout;
+    return NS_OK;
+  }
+
+  inline void
+  SetObserver(MiniShmObserver *aObserver) { mObserver = aObserver; }
+
+  /**
+   * Obtains a writable pointer into shared memory of type T. This version 
+   * differs from GetWritePtr in that it allows typename T to be one of 
+   * the private data structures declared in MiniShmBase.
+   *
+   * @param aPtr Pointer to receive the shared memory address.
+   *             This value is set if and only if the function 
+   *             succeeded.
+   * @return NS_OK if and only if aPtr was successfully obtained.
+   *         NS_ERROR_ILLEGAL_VALUE if type T not an internal MiniShm struct.
+   *         NS_ERROR_NOT_INITIALIZED if there is no valid MiniShm connection.
+   */
+  template<typename T> nsresult
+  GetWritePtrInternal(T*& aPtr)
+  {
+    if (!mWriteHeader) {
+      return NS_ERROR_NOT_INITIALIZED;
+    }
+    if (sizeof(T) > mPayloadMaxLen ||
+        T::identifier > RESERVED_CODE_LAST) {
+      return NS_ERROR_ILLEGAL_VALUE;
+    }
+    mWriteHeader->mId = T::identifier;
+    mWriteHeader->mPayloadLen = sizeof(T);
+    aPtr = reinterpret_cast<T*>(mWriteHeader + 1);
+    return NS_OK;
+  }
+
+  static VOID CALLBACK
+  SOnEvent(PVOID aContext, BOOLEAN aIsTimer)
+  {
+    MiniShmBase* object = static_cast<MiniShmBase*>(aContext);
+    object->OnEvent();
+  }
+
+private:
+  MiniShmObserver*  mObserver;
+  MiniShmHeader*    mWriteHeader;
+  MiniShmHeader*    mReadHeader;
+  unsigned int      mPayloadMaxLen;
+  HANDLE            mGuard;
+  DWORD             mTimeout;
+
+  DISALLOW_COPY_AND_ASSIGN(MiniShmBase);
+};
+
+} // namespace plugins
+} // namespace mozilla
+
+#endif // mozilla_plugins_MiniShmBase_h
+
diff --git a/dom/plugins/ipc/hangui/MiniShmChild.cpp b/dom/plugins/ipc/hangui/MiniShmChild.cpp
new file mode 100644
index 000000000..0683340a1
--- /dev/null
+++ b/dom/plugins/ipc/hangui/MiniShmChild.cpp
@@ -0,0 +1,173 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "MiniShmChild.h"
+
+#include <limits>
+#include <sstream>
+
+namespace mozilla {
+namespace plugins {
+
+MiniShmChild::MiniShmChild()
+  : mParentEvent(nullptr),
+    mParentGuard(nullptr),
+    mChildEvent(nullptr),
+    mChildGuard(nullptr),
+    mFileMapping(nullptr),
+    mRegWait(nullptr),
+    mView(nullptr),
+    mTimeout(INFINITE)
+{}
+
+MiniShmChild::~MiniShmChild()
+{
+  if (mRegWait) {
+    ::UnregisterWaitEx(mRegWait, INVALID_HANDLE_VALUE);
+  }
+  if (mParentGuard) {
+    // Try to avoid shutting down while the parent's event handler is running.
+    ::WaitForSingleObject(mParentGuard, mTimeout);
+    ::CloseHandle(mParentGuard);
+  }
+  if (mParentEvent) {
+    ::CloseHandle(mParentEvent);
+  }
+  if (mChildEvent) {
+    ::CloseHandle(mChildEvent);
+  }
+  if (mChildGuard) {
+    ::CloseHandle(mChildGuard);
+  }
+  if (mView) {
+    ::UnmapViewOfFile(mView);
+  }
+  if (mFileMapping) {
+    ::CloseHandle(mFileMapping);
+  }
+}
+
+nsresult
+MiniShmChild::Init(MiniShmObserver* aObserver, const std::wstring& aCookie,
+                   const DWORD aTimeout)
+{
+  if (aCookie.empty() || !aTimeout) {
+    return NS_ERROR_ILLEGAL_VALUE;
+  }
+  if (mFileMapping) {
+    return NS_ERROR_ALREADY_INITIALIZED;
+  }
+  std::wistringstream iss(aCookie);
+  HANDLE mapHandle = nullptr;
+  iss >> mapHandle;
+  if (!iss) {
+    return NS_ERROR_ILLEGAL_VALUE;
+  }
+  ScopedMappedFileView view(::MapViewOfFile(mapHandle,
+                                            FILE_MAP_WRITE,
+                                            0, 0, 0));
+  if (!view.IsValid()) {
+    return NS_ERROR_FAILURE;
+  }
+  MEMORY_BASIC_INFORMATION memInfo = {0};
+  SIZE_T querySize = ::VirtualQuery(view, &memInfo, sizeof(memInfo));
+  unsigned int mappingSize = 0;
+  if (querySize) {
+    if (memInfo.RegionSize <= std::numeric_limits<unsigned int>::max()) {
+      mappingSize = static_cast<unsigned int>(memInfo.RegionSize);
+    }
+  }
+  if (!querySize || !mappingSize) {
+    return NS_ERROR_FAILURE;
+  }
+  nsresult rv = SetView(view, mappingSize, true);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  const MiniShmInit* initStruct = nullptr;
+  rv = GetReadPtr(initStruct);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  if (!initStruct->mParentEvent || !initStruct->mParentGuard ||
+      !initStruct->mChildEvent || !initStruct->mChildGuard) {
+    return NS_ERROR_FAILURE;
+  }
+  rv = SetGuard(initStruct->mParentGuard, aTimeout);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  if (!::RegisterWaitForSingleObject(&mRegWait,
+                                     initStruct->mChildEvent,
+                                     &SOnEvent,
+                                     this,
+                                     INFINITE,
+                                     WT_EXECUTEDEFAULT)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  MiniShmInitComplete* initCompleteStruct = nullptr;
+  rv = GetWritePtrInternal(initCompleteStruct);
+  if (NS_FAILED(rv)) {
+    ::UnregisterWaitEx(mRegWait, INVALID_HANDLE_VALUE);
+    mRegWait = nullptr;
+    return NS_ERROR_FAILURE;
+  }
+
+  initCompleteStruct->mSucceeded = true;
+
+  // We must set the member variables before we signal the event
+  mFileMapping = mapHandle;
+  mView = view.Take();
+  mParentEvent = initStruct->mParentEvent;
+  mParentGuard = initStruct->mParentGuard;
+  mChildEvent = initStruct->mChildEvent;
+  mChildGuard = initStruct->mChildGuard;
+  SetObserver(aObserver);
+  mTimeout = aTimeout;
+
+  rv = Send();
+  if (NS_FAILED(rv)) {
+    initCompleteStruct->mSucceeded = false;
+    mFileMapping = nullptr;
+    view.Set(mView);
+    mView = nullptr;
+    mParentEvent = nullptr;
+    mParentGuard = nullptr;
+    mChildEvent = nullptr;
+    mChildGuard = nullptr;
+    ::UnregisterWaitEx(mRegWait, INVALID_HANDLE_VALUE);
+    mRegWait = nullptr;
+    return rv;
+  }
+
+  OnConnect();
+  return NS_OK;
+}
+
+nsresult
+MiniShmChild::Send()
+{
+  if (!mParentEvent) {
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+  if (!::SetEvent(mParentEvent)) {
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+void
+MiniShmChild::OnEvent()
+{
+  MiniShmBase::OnEvent();
+  ::SetEvent(mChildGuard);
+}
+
+} // namespace plugins
+} // namespace mozilla
+
diff --git a/dom/plugins/ipc/hangui/MiniShmChild.h b/dom/plugins/ipc/hangui/MiniShmChild.h
new file mode 100644
index 000000000..19c9deea7
--- /dev/null
+++ b/dom/plugins/ipc/hangui/MiniShmChild.h
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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_plugins_MiniShmChild_h
+#define mozilla_plugins_MiniShmChild_h
+
+#include "MiniShmBase.h"
+
+#include <string>
+
+namespace mozilla {
+namespace plugins {
+
+/**
+ * This class provides a lightweight shared memory interface for a child 
+ * process in Win32.
+ * This code assumes that there is a parent-child relationship between 
+ * processes, as it inherits handles from the parent process.
+ * Note that this class is *not* an IPDL actor.
+ *
+ * @see MiniShmParent
+ */
+class MiniShmChild : public MiniShmBase
+{
+public:
+  MiniShmChild();
+  virtual ~MiniShmChild();
+
+  /**
+   * Initialize shared memory on the child side.
+   *
+   * @param aObserver A MiniShmObserver object to receive event notifications.
+   * @param aCookie Cookie obtained from MiniShmParent::GetCookie
+   * @param aTimeout Timeout in milliseconds.
+   * @return nsresult error code
+   */
+  nsresult
+  Init(MiniShmObserver* aObserver, const std::wstring& aCookie,
+       const DWORD aTimeout);
+
+  virtual nsresult
+  Send() override;
+
+protected:
+  void
+  OnEvent() override;
+
+private:
+  HANDLE mParentEvent;
+  HANDLE mParentGuard;
+  HANDLE mChildEvent;
+  HANDLE mChildGuard;
+  HANDLE mFileMapping;
+  HANDLE mRegWait;
+  LPVOID mView;
+  DWORD  mTimeout;
+
+  DISALLOW_COPY_AND_ASSIGN(MiniShmChild);
+};
+
+} // namespace plugins
+} // namespace mozilla
+
+#endif // mozilla_plugins_MiniShmChild_h
+
diff --git a/dom/plugins/ipc/hangui/PluginHangUI.h b/dom/plugins/ipc/hangui/PluginHangUI.h
new file mode 100644
index 000000000..2c6df78bb
--- /dev/null
+++ b/dom/plugins/ipc/hangui/PluginHangUI.h
@@ -0,0 +1,54 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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_plugins_PluginHangUI_h
+#define mozilla_plugins_PluginHangUI_h
+
+namespace mozilla {
+namespace plugins {
+
+enum HangUIUserResponse
+{
+  HANGUI_USER_RESPONSE_CANCEL = 1,
+  HANGUI_USER_RESPONSE_CONTINUE = 2,
+  HANGUI_USER_RESPONSE_STOP = 4,
+  HANGUI_USER_RESPONSE_DONT_SHOW_AGAIN = 8
+};
+
+enum PluginHangUIStructID
+{
+  PLUGIN_HANGUI_COMMAND = 0x10,
+  PLUGIN_HANGUI_RESULT
+};
+
+struct PluginHangUICommand
+{
+  enum
+  {
+    identifier = PLUGIN_HANGUI_COMMAND
+  };
+  enum CmdCode
+  {
+    HANGUI_CMD_SHOW = 1,
+    HANGUI_CMD_CANCEL = 2
+  };
+  CmdCode mCode;
+};
+
+struct PluginHangUIResponse
+{
+  enum
+  {
+    identifier = PLUGIN_HANGUI_RESULT
+  };
+  unsigned int  mResponseBits;
+};
+
+} // namespace plugins
+} // namespace mozilla
+
+#endif // mozilla_plugins_PluginHangUI_h
+
diff --git a/dom/plugins/ipc/hangui/PluginHangUIChild.cpp b/dom/plugins/ipc/hangui/PluginHangUIChild.cpp
new file mode 100644
index 000000000..c1730a207
--- /dev/null
+++ b/dom/plugins/ipc/hangui/PluginHangUIChild.cpp
@@ -0,0 +1,425 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "PluginHangUI.h"
+
+#include "PluginHangUIChild.h"
+#include "HangUIDlg.h"
+
+#include <assert.h>
+#include <commctrl.h>
+#include <windowsx.h>
+#include <algorithm>
+#include <sstream>
+#include <vector>
+
+namespace mozilla {
+namespace plugins {
+
+struct WinInfo
+{
+  WinInfo(HWND aHwnd, POINT& aPos, SIZE& aSize)
+    :hwnd(aHwnd)
+  {
+    pos.x = aPos.x;
+    pos.y = aPos.y;
+    size.cx = aSize.cx;
+    size.cy = aSize.cy;
+  }
+  HWND  hwnd;
+  POINT pos;
+  SIZE  size;
+};
+typedef std::vector<WinInfo> WinInfoVec;
+
+PluginHangUIChild* PluginHangUIChild::sSelf = nullptr;
+const int PluginHangUIChild::kExpectedMinimumArgc = 10;
+
+PluginHangUIChild::PluginHangUIChild()
+  : mResponseBits(0),
+    mParentWindow(nullptr),
+    mDlgHandle(nullptr),
+    mMainThread(nullptr),
+    mParentProcess(nullptr),
+    mRegWaitProcess(nullptr),
+    mIPCTimeoutMs(0)
+{
+}
+
+PluginHangUIChild::~PluginHangUIChild()
+{
+  if (mMainThread) {
+    CloseHandle(mMainThread);
+  }
+  if (mRegWaitProcess) {
+    UnregisterWaitEx(mRegWaitProcess, INVALID_HANDLE_VALUE);
+  }
+  if (mParentProcess) {
+    CloseHandle(mParentProcess);
+  }
+  sSelf = nullptr;
+}
+
+bool
+PluginHangUIChild::Init(int aArgc, wchar_t* aArgv[])
+{
+  if (aArgc < kExpectedMinimumArgc) {
+    return false;
+  }
+  unsigned int i = 1;
+  mMessageText = aArgv[i];
+  mWindowTitle = aArgv[++i];
+  mWaitBtnText = aArgv[++i];
+  mKillBtnText = aArgv[++i];
+  mNoFutureText = aArgv[++i];
+  std::wistringstream issHwnd(aArgv[++i]);
+  issHwnd >> reinterpret_cast<HANDLE&>(mParentWindow);
+  if (!issHwnd) {
+    return false;
+  }
+  std::wistringstream issProc(aArgv[++i]);
+  issProc >> mParentProcess;
+  if (!issProc) {
+    return false;
+  }
+  // Only set the App User Model ID if it's present in the args
+  if (wcscmp(aArgv[++i], L"-")) {
+    HMODULE shell32 = LoadLibrary(L"shell32.dll");
+    if (shell32) {
+      SETAPPUSERMODELID fSetAppUserModelID = (SETAPPUSERMODELID)
+        GetProcAddress(shell32, "SetCurrentProcessExplicitAppUserModelID");
+      if (fSetAppUserModelID) {
+        fSetAppUserModelID(aArgv[i]);
+      }
+      FreeLibrary(shell32);
+    }
+  }
+  std::wistringstream issTimeout(aArgv[++i]);
+  issTimeout >> mIPCTimeoutMs;
+  if (!issTimeout) {
+    return false;
+  }
+
+  nsresult rv = mMiniShm.Init(this,
+                              std::wstring(aArgv[++i]),
+                              IsDebuggerPresent() ? INFINITE : mIPCTimeoutMs);
+  if (NS_FAILED(rv)) {
+    return false;
+  }
+  sSelf = this;
+  return true;
+}
+
+void
+PluginHangUIChild::OnMiniShmEvent(MiniShmBase* aMiniShmObj)
+{
+  const PluginHangUICommand* cmd = nullptr;
+  nsresult rv = aMiniShmObj->GetReadPtr(cmd);
+  assert(NS_SUCCEEDED(rv));
+  bool returnStatus = false;
+  if (NS_SUCCEEDED(rv)) {
+    switch (cmd->mCode) {
+      case PluginHangUICommand::HANGUI_CMD_SHOW:
+        returnStatus = RecvShow();
+        break;
+      case PluginHangUICommand::HANGUI_CMD_CANCEL:
+        returnStatus = RecvCancel();
+        break;
+      default:
+        break;
+    }
+  }
+}
+
+// static
+INT_PTR CALLBACK
+PluginHangUIChild::SHangUIDlgProc(HWND aDlgHandle, UINT aMsgCode,
+                                  WPARAM aWParam, LPARAM aLParam)
+{
+  PluginHangUIChild *self = PluginHangUIChild::sSelf;
+  if (self) {
+    return self->HangUIDlgProc(aDlgHandle, aMsgCode, aWParam, aLParam);
+  }
+  return FALSE;
+}
+
+void
+PluginHangUIChild::ResizeButtons()
+{
+  // Control IDs are specified right-to-left as they appear in the dialog
+  UINT ids[] = { IDC_STOP, IDC_CONTINUE };
+  UINT numIds = sizeof(ids)/sizeof(ids[0]);
+
+  // Pass 1: Compute the ideal size
+  bool needResizing = false;
+  SIZE idealSize = {0};
+  WinInfoVec winInfo;
+  for (UINT i = 0; i < numIds; ++i) {
+    HWND wnd = GetDlgItem(mDlgHandle, ids[i]);
+    if (!wnd) {
+      return;
+    }
+
+    // Get the button's dimensions in screen coordinates
+    RECT curRect;
+    if (!GetWindowRect(wnd, &curRect)) {
+      return;
+    }
+
+    // Get (x,y) position of the button in client coordinates
+    POINT pt;
+    pt.x = curRect.left;
+    pt.y = curRect.top;
+    if (!ScreenToClient(mDlgHandle, &pt)) {
+      return;
+    }
+
+    // Request the button's text margins
+    RECT margins;
+    if (!Button_GetTextMargin(wnd, &margins)) {
+      return;
+    }
+
+    // Compute the button's width and height
+    SIZE curSize;
+    curSize.cx = curRect.right - curRect.left;
+    curSize.cy = curRect.bottom - curRect.top;
+
+    // Request the button's ideal width and height and add in the margins
+    SIZE size = {0};
+    if (!Button_GetIdealSize(wnd, &size)) {
+      return;
+    }
+    size.cx += margins.left + margins.right;
+    size.cy += margins.top + margins.bottom;
+
+    // Size all buttons to be the same width as the longest button encountered
+    idealSize.cx = std::max(idealSize.cx, size.cx);
+    idealSize.cy = std::max(idealSize.cy, size.cy);
+
+    // We won't bother resizing unless we need extra space
+    if (idealSize.cx > curSize.cx) {
+      needResizing = true;
+    }
+
+    // Save the relevant info for the resize, if any. We do this even if 
+    // needResizing is false because another button may trigger a resize later.
+    winInfo.push_back(WinInfo(wnd, pt, curSize));
+  }
+
+  if (!needResizing) {
+    return;
+  }
+
+  // Pass 2: Resize the windows
+  int deltaX = 0;
+  HDWP hwp = BeginDeferWindowPos((int) winInfo.size());
+  if (!hwp) {
+    return;
+  }
+  for (WinInfoVec::const_iterator itr = winInfo.begin();
+       itr != winInfo.end(); ++itr) {
+    // deltaX accumulates the size changes so that each button's x coordinate 
+    // can compensate for the width increases
+    deltaX += idealSize.cx - itr->size.cx;
+    hwp = DeferWindowPos(hwp, itr->hwnd, nullptr,
+                         itr->pos.x - deltaX, itr->pos.y,
+                         idealSize.cx, itr->size.cy,
+                         SWP_NOZORDER | SWP_NOACTIVATE);
+    if (!hwp) {
+      return;
+    }
+  }
+  EndDeferWindowPos(hwp);
+}
+
+INT_PTR
+PluginHangUIChild::HangUIDlgProc(HWND aDlgHandle, UINT aMsgCode, WPARAM aWParam,
+                                 LPARAM aLParam)
+{
+  mDlgHandle = aDlgHandle;
+  switch (aMsgCode) {
+    case WM_INITDIALOG: {
+      // Register a wait on the Firefox process so that we will be informed
+      // if it dies while the dialog is showing
+      RegisterWaitForSingleObject(&mRegWaitProcess,
+                                  mParentProcess,
+                                  &SOnParentProcessExit,
+                                  this,
+                                  INFINITE,
+                                  WT_EXECUTEDEFAULT | WT_EXECUTEONLYONCE);
+      SetWindowText(aDlgHandle, mWindowTitle);
+      SetDlgItemText(aDlgHandle, IDC_MSG, mMessageText);
+      SetDlgItemText(aDlgHandle, IDC_NOFUTURE, mNoFutureText);
+      SetDlgItemText(aDlgHandle, IDC_CONTINUE, mWaitBtnText);
+      SetDlgItemText(aDlgHandle, IDC_STOP, mKillBtnText);
+      ResizeButtons();
+      HANDLE icon = LoadImage(nullptr, IDI_QUESTION, IMAGE_ICON, 0, 0,
+                              LR_DEFAULTSIZE | LR_SHARED);
+      if (icon) {
+        SendDlgItemMessage(aDlgHandle, IDC_DLGICON, STM_SETICON, (WPARAM)icon, 0);
+      }
+      EnableWindow(mParentWindow, FALSE);
+      return TRUE;
+    }
+    case WM_CLOSE: {
+      mResponseBits |= HANGUI_USER_RESPONSE_CANCEL;
+      EndDialog(aDlgHandle, 0);
+      SetWindowLongPtr(aDlgHandle, DWLP_MSGRESULT, 0);
+      return TRUE;
+    }
+    case WM_COMMAND: {
+      switch (LOWORD(aWParam)) {
+        case IDC_CONTINUE:
+          if (HIWORD(aWParam) == BN_CLICKED) {
+            mResponseBits |= HANGUI_USER_RESPONSE_CONTINUE;
+            EndDialog(aDlgHandle, 1);
+            SetWindowLongPtr(aDlgHandle, DWLP_MSGRESULT, 0);
+            return TRUE;
+          }
+          break;
+        case IDC_STOP:
+          if (HIWORD(aWParam) == BN_CLICKED) {
+            mResponseBits |= HANGUI_USER_RESPONSE_STOP;
+            EndDialog(aDlgHandle, 1);
+            SetWindowLongPtr(aDlgHandle, DWLP_MSGRESULT, 0);
+            return TRUE;
+          }
+          break;
+        case IDC_NOFUTURE:
+          if (HIWORD(aWParam) == BN_CLICKED) {
+            if (Button_GetCheck(GetDlgItem(aDlgHandle,
+                                           IDC_NOFUTURE)) == BST_CHECKED) {
+              mResponseBits |= HANGUI_USER_RESPONSE_DONT_SHOW_AGAIN;
+            } else {
+              mResponseBits &=
+                ~static_cast<DWORD>(HANGUI_USER_RESPONSE_DONT_SHOW_AGAIN);
+            }
+            SetWindowLongPtr(aDlgHandle, DWLP_MSGRESULT, 0);
+            return TRUE;
+          }
+          break;
+        default:
+          break;
+      }
+      break;
+    }
+    case WM_DESTROY: {
+      EnableWindow(mParentWindow, TRUE);
+      SetForegroundWindow(mParentWindow);
+      break;
+    }
+    default:
+      break;
+  }
+  return FALSE;
+}
+
+// static
+VOID CALLBACK
+PluginHangUIChild::SOnParentProcessExit(PVOID aObject, BOOLEAN aIsTimer)
+{
+  // Simulate a cancel if the parent process died
+  PluginHangUIChild* object = static_cast<PluginHangUIChild*>(aObject);
+  object->RecvCancel();
+}
+
+bool
+PluginHangUIChild::RecvShow()
+{
+  return (QueueUserAPC(&ShowAPC,
+                       mMainThread,
+                       reinterpret_cast<ULONG_PTR>(this)));
+}
+
+bool
+PluginHangUIChild::Show()
+{
+  INT_PTR dlgResult = DialogBox(GetModuleHandle(nullptr),
+                                MAKEINTRESOURCE(IDD_HANGUIDLG),
+                                nullptr,
+                                &SHangUIDlgProc);
+  mDlgHandle = nullptr;
+  assert(dlgResult != -1);
+  bool result = false;
+  if (dlgResult != -1) {
+    PluginHangUIResponse* response = nullptr;
+    nsresult rv = mMiniShm.GetWritePtr(response);
+    if (NS_SUCCEEDED(rv)) {
+      response->mResponseBits = mResponseBits;
+      result = NS_SUCCEEDED(mMiniShm.Send());
+    }
+  }
+  return result;
+}
+
+// static
+VOID CALLBACK
+PluginHangUIChild::ShowAPC(ULONG_PTR aContext)
+{
+  PluginHangUIChild* object = reinterpret_cast<PluginHangUIChild*>(aContext);
+  object->Show();
+}
+
+bool
+PluginHangUIChild::RecvCancel()
+{
+  if (mDlgHandle) {
+    PostMessage(mDlgHandle, WM_CLOSE, 0, 0);
+  }
+  return true;
+}
+
+bool
+PluginHangUIChild::WaitForDismissal()
+{
+  if (!SetMainThread()) {
+    return false;
+  }
+  DWORD waitResult = WaitForSingleObjectEx(mParentProcess,
+                                           mIPCTimeoutMs,
+                                           TRUE);
+  return waitResult == WAIT_OBJECT_0 ||
+         waitResult == WAIT_IO_COMPLETION;
+}
+
+bool
+PluginHangUIChild::SetMainThread()
+{
+  if (mMainThread) {
+    CloseHandle(mMainThread);
+    mMainThread = nullptr;
+  }
+  mMainThread = OpenThread(THREAD_SET_CONTEXT,
+                           FALSE,
+                           GetCurrentThreadId());
+  return !(!mMainThread);
+}
+
+} // namespace plugins
+} // namespace mozilla
+
+#ifdef __MINGW32__
+extern "C"
+#endif
+int
+wmain(int argc, wchar_t *argv[])
+{
+  INITCOMMONCONTROLSEX icc = { sizeof(INITCOMMONCONTROLSEX),
+                               ICC_STANDARD_CLASSES };
+  if (!InitCommonControlsEx(&icc)) {
+    return 1;
+  }
+  mozilla::plugins::PluginHangUIChild hangui;
+  if (!hangui.Init(argc, argv)) {
+    return 1;
+  }
+  if (!hangui.WaitForDismissal()) {
+    return 1;
+  }
+  return 0;
+}
+
diff --git a/dom/plugins/ipc/hangui/PluginHangUIChild.h b/dom/plugins/ipc/hangui/PluginHangUIChild.h
new file mode 100644
index 000000000..000e003ec
--- /dev/null
+++ b/dom/plugins/ipc/hangui/PluginHangUIChild.h
@@ -0,0 +1,113 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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_plugins_PluginHangUIChild_h
+#define mozilla_plugins_PluginHangUIChild_h
+
+#include "MiniShmChild.h"
+
+#include <string>
+
+#include <windows.h>
+
+namespace mozilla {
+namespace plugins {
+
+/**
+ * This class implements the plugin-hang-ui.
+ *
+ * NOTE: PluginHangUIChild is *not* an IPDL actor! In this case, "Child" 
+ *       is describing the fact that plugin-hang-ui is a child process to the 
+ *       firefox process, which is the PluginHangUIParent.
+ *       PluginHangUIParent and PluginHangUIChild are a matched pair.
+ * @see PluginHangUIParent
+ */
+class PluginHangUIChild : public MiniShmObserver
+{
+public:
+  PluginHangUIChild();
+  virtual ~PluginHangUIChild();
+
+  bool
+  Init(int aArgc, wchar_t* aArgv[]);
+
+  /**
+   * Displays the Plugin Hang UI and does not return until the UI has 
+   * been dismissed.
+   *
+   * @return true if the UI was displayed and the user response was 
+   *         successfully sent back to the parent. Otherwise false.
+   */
+  bool
+  Show();
+
+  /**
+   * Causes the calling thread to wait either for the Hang UI to be 
+   * dismissed or for the parent process to terminate. This should 
+   * be called by the main thread.
+   *
+   * @return true unless there was an error initiating the wait
+   */
+  bool
+  WaitForDismissal();
+
+  virtual void
+  OnMiniShmEvent(MiniShmBase* aMiniShmObj) override;
+
+private:
+  bool
+  RecvShow();
+
+  bool
+  RecvCancel();
+
+  bool
+  SetMainThread();
+
+  void
+  ResizeButtons();
+
+  INT_PTR
+  HangUIDlgProc(HWND aDlgHandle, UINT aMsgCode, WPARAM aWParam, LPARAM aLParam);
+
+  static VOID CALLBACK
+  ShowAPC(ULONG_PTR aContext);
+
+  static INT_PTR CALLBACK
+  SHangUIDlgProc(HWND aDlgHandle, UINT aMsgCode, WPARAM aWParam,
+                 LPARAM aLParam);
+
+  static VOID CALLBACK
+  SOnParentProcessExit(PVOID aObject, BOOLEAN aIsTimer);
+
+  static PluginHangUIChild *sSelf;
+
+  const wchar_t* mMessageText;
+  const wchar_t* mWindowTitle;
+  const wchar_t* mWaitBtnText;
+  const wchar_t* mKillBtnText;
+  const wchar_t* mNoFutureText;
+  unsigned int mResponseBits;
+  HWND mParentWindow;
+  HWND mDlgHandle;
+  HANDLE mMainThread;
+  HANDLE mParentProcess;
+  HANDLE mRegWaitProcess;
+  DWORD mIPCTimeoutMs;
+  MiniShmChild mMiniShm;
+
+  static const int kExpectedMinimumArgc;
+
+  typedef HRESULT (WINAPI *SETAPPUSERMODELID)(PCWSTR);
+
+  DISALLOW_COPY_AND_ASSIGN(PluginHangUIChild);
+};
+
+} // namespace plugins
+} // namespace mozilla
+
+#endif // mozilla_plugins_PluginHangUIChild_h
+
diff --git a/dom/plugins/ipc/hangui/module.ver b/dom/plugins/ipc/hangui/module.ver
new file mode 100644
index 000000000..d11506f4a
--- /dev/null
+++ b/dom/plugins/ipc/hangui/module.ver
@@ -0,0 +1,6 @@
+WIN32_MODULE_COMPANYNAME=Mozilla Corporation
+WIN32_MODULE_PRODUCTVERSION=@MOZ_APP_WINVERSION@
+WIN32_MODULE_PRODUCTVERSION_STRING=@MOZ_APP_VERSION@
+WIN32_MODULE_DESCRIPTION=Plugin Hang UI for @MOZ_APP_DISPLAYNAME@
+WIN32_MODULE_PRODUCTNAME=@MOZ_APP_DISPLAYNAME@
+WIN32_MODULE_NAME=@MOZ_APP_DISPLAYNAME@
diff --git a/dom/plugins/ipc/hangui/moz.build b/dom/plugins/ipc/hangui/moz.build
new file mode 100644
index 000000000..0b84cfb8f
--- /dev/null
+++ b/dom/plugins/ipc/hangui/moz.build
@@ -0,0 +1,27 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+Program('plugin-hang-ui')
+
+UNIFIED_SOURCES += [
+    'MiniShmChild.cpp',
+    'PluginHangUIChild.cpp',
+]
+include('/ipc/chromium/chromium-config.mozbuild')
+
+DEFINES['NS_NO_XPCOM'] = True
+DEFINES['_HAS_EXCEPTIONS'] = 0
+
+DISABLE_STL_WRAPPING = True
+
+if CONFIG['GNU_CC']:
+    WIN32_EXE_LDFLAGS += ['-municode']
+
+RCINCLUDE = 'HangUIDlg.rc'
+
+OS_LIBS += [
+    'comctl32',
+]
diff --git a/dom/plugins/ipc/hangui/plugin-hang-ui.exe.manifest b/dom/plugins/ipc/hangui/plugin-hang-ui.exe.manifest
new file mode 100644
index 000000000..8d6149c58
--- /dev/null
+++ b/dom/plugins/ipc/hangui/plugin-hang-ui.exe.manifest
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+<assemblyIdentity
+        version="1.0.0.0"
+        processorArchitecture="*"
+        name="plugin-hang-ui"
+        type="win32"
+/>
+<description>Firefox Plugin Hang User Interface</description>
+<dependency>
+        <dependentAssembly>
+                <assemblyIdentity
+                        type="win32"
+                        name="Microsoft.Windows.Common-Controls"
+                        version="6.0.0.0"
+                        processorArchitecture="*"
+                        publicKeyToken="6595b64144ccf1df"
+                        language="*"
+                />
+        </dependentAssembly>
+</dependency>
+  <ms_asmv3:trustInfo xmlns:ms_asmv3="urn:schemas-microsoft-com:asm.v3">
+    <ms_asmv3:security>
+      <ms_asmv3:requestedPrivileges>
+        <ms_asmv3:requestedExecutionLevel level="asInvoker" uiAccess="false" />
+      </ms_asmv3:requestedPrivileges>
+    </ms_asmv3:security>
+  </ms_asmv3:trustInfo>
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
+      <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+      <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+      <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
+    </application>
+  </compatibility>
+</assembly>