gecko-dev/ipc/glue/WindowsMessageLoop.h

/* -*- 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 IPC_GLUE_WINDOWSMESSAGELOOP_H
#define IPC_GLUE_WINDOWSMESSAGELOOP_H

// This file is only meant to compile on windows
#include <windows.h>

#include "nsISupportsImpl.h"

namespace mozilla {
namespace ipc {
namespace windows {

void InitUIThread();

class DeferredMessage {
 public:
  MOZ_COUNTED_DEFAULT_CTOR(DeferredMessage)

  MOZ_COUNTED_DTOR_VIRTUAL(DeferredMessage)

  virtual void Run() = 0;
};

// Uses CallWndProc to deliver a message at a later time. Messages faked with
// this class must not have pointers in their wParam or lParam members as they
// may be invalid by the time the message actually runs.
class DeferredSendMessage : public DeferredMessage {
 public:
  DeferredSendMessage(HWND aHWnd, UINT aMessage, WPARAM aWParam, LPARAM aLParam)
      : hWnd(aHWnd), message(aMessage), wParam(aWParam), lParam(aLParam) {}

  virtual void Run();

 protected:
  HWND hWnd;
  UINT message;
  WPARAM wParam;
  LPARAM lParam;
};

// Uses RedrawWindow to fake several painting-related messages. Flags passed
// to the constructor go directly to RedrawWindow.
class DeferredRedrawMessage : public DeferredMessage {
 public:
  DeferredRedrawMessage(HWND aHWnd, UINT aFlags) : hWnd(aHWnd), flags(aFlags) {}

  virtual void Run();

 private:
  HWND hWnd;
  UINT flags;
};

// Uses UpdateWindow to generate a WM_PAINT message if needed.
class DeferredUpdateMessage : public DeferredMessage {
 public:
  explicit DeferredUpdateMessage(HWND aHWnd);

  virtual void Run();

 private:
  HWND mWnd;
  RECT mUpdateRect;
};

// This class duplicates a string that may exist in the lParam member of the
// message.
class DeferredSettingChangeMessage : public DeferredSendMessage {
 public:
  DeferredSettingChangeMessage(HWND aHWnd, UINT aMessage, WPARAM aWParam,
                               LPARAM aLParam);

  ~DeferredSettingChangeMessage();

 private:
  wchar_t* lParamString;
};

// This class uses SetWindowPos to fake various size-related messages. Flags
// passed to the constructor go straight through to SetWindowPos.
class DeferredWindowPosMessage : public DeferredMessage {
 public:
  DeferredWindowPosMessage(HWND aHWnd, LPARAM aLParam,
                           bool aForCalcSize = false, WPARAM aWParam = 0);

  virtual void Run();

 private:
  WINDOWPOS windowPos;
};

// This class duplicates a data buffer for a WM_COPYDATA message.
class DeferredCopyDataMessage : public DeferredSendMessage {
 public:
  DeferredCopyDataMessage(HWND aHWnd, UINT aMessage, WPARAM aWParam,
                          LPARAM aLParam);

  ~DeferredCopyDataMessage();

 private:
  COPYDATASTRUCT copyData;
};

class DeferredStyleChangeMessage : public DeferredMessage {
 public:
  DeferredStyleChangeMessage(HWND aHWnd, WPARAM aWParam, LPARAM aLParam);

  virtual void Run();

 private:
  HWND hWnd;
  int index;
  LONG_PTR style;
};

class DeferredSetIconMessage : public DeferredSendMessage {
 public:
  DeferredSetIconMessage(HWND aHWnd, UINT aMessage, WPARAM aWParam,
                         LPARAM aLParam);

  virtual void Run();
};

} /* namespace windows */
} /* namespace ipc */
} /* namespace mozilla */

#endif /* IPC_GLUE_WINDOWSMESSAGELOOP_H */