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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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 * ***** END LICENSE BLOCK ***** */

#ifndef TOOLKIT_H      
#define TOOLKIT_H

#include "nsdefs.h"
#include "nsIToolkit.h"

struct IActiveIMMApp;

#include "nsWindowAPI.h"
#include "nsITimer.h"
#include "nsCOMPtr.h"

struct MethodInfo;
class nsIEventQueue;

// we used to use MAX_PATH
// which works great for one file
// but for multiple files, the format is
// dirpath\0\file1\0file2\0...filen\0\0
// and that can quickly be more than MAX_PATH (260)
// see bug #172001 for more details
#define FILE_BUFFER_SIZE 4096 


/**
 * Wrapper around the thread running the message pump.
 * The toolkit abstraction is necessary because the message pump must
 * execute within the same thread that created the widget under Win32.
 */ 

class nsToolkit : public nsIToolkit
{

  public:

            NS_DECL_ISUPPORTS

                            nsToolkit();
            NS_IMETHOD      Init(PRThread *aThread);
            void            CallMethod(MethodInfo *info);
            // Return whether the current thread is the application's Gui thread.  
            PRBool          IsGuiThread(void)      { return (PRBool)(mGuiThread == PR_GetCurrentThread());}
            PRThread*       GetGuiThread(void)       { return mGuiThread;   }
            HWND            GetDispatchWindow(void)  { return mDispatchWnd; }
            void            CreateInternalWindow(PRThread *aThread);
            // Return whether the user is currently moving any application window
            PRBool          UserIsMovingWindow(void);
            nsIEventQueue*  GetEventQueue(void);

private:
                            ~nsToolkit();
            void            CreateUIThread(void);

public:
    // Window procedure for the internal window
    static LRESULT CALLBACK WindowProc(HWND hWnd, 
                                        UINT Msg, 
                                        WPARAM WParam, 
                                        LPARAM lParam);

protected:
    // Handle of the window used to receive dispatch messages.
    HWND        mDispatchWnd;
    // Thread Id of the "main" Gui thread.
    PRThread    *mGuiThread;

public:
    static HINSTANCE mDllInstance;
    // OS flag
    static PRBool    mIsNT;
    static PRBool    mIsWinXP;
    static PRBool    mUseImeApiW;
    static PRBool    mW2KXP_CP936;

    static void Startup(HINSTANCE hModule);
    static void Shutdown();

    // Active Input Method support
    static IActiveIMMApp *gAIMMApp;
    static PRInt32       gAIMMCount;

    // Ansi API support
    static HMODULE              mShell32Module;
    static NS_DefWindowProc     mDefWindowProc;
    static NS_CallWindowProc    mCallWindowProc;
    static NS_SetWindowLong     mSetWindowLong;
    static NS_GetWindowLong     mGetWindowLong;
    static NS_SendMessage       mSendMessage;
    static NS_DispatchMessage   mDispatchMessage;
    static NS_GetMessage        mGetMessage;
    static NS_PeekMessage       mPeekMessage;
    static NS_GetOpenFileName   mGetOpenFileName;
    static NS_GetSaveFileName   mGetSaveFileName;
    static NS_GetClassName      mGetClassName;
    static NS_CreateWindowEx    mCreateWindowEx;
    static NS_RegisterClass     mRegisterClass;
    static NS_UnregisterClass   mUnregisterClass;
#ifndef WINCE
    static NS_DragQueryFile       mDragQueryFile;
    static NS_SHGetPathFromIDList mSHGetPathFromIDList;
    static NS_SHBrowseForFolder   mSHBrowseForFolder;
#endif
};

#define WM_CALLMETHOD   (WM_USER+1)

inline void nsToolkit::CallMethod(MethodInfo *info)
{
    NS_PRECONDITION(::IsWindow(mDispatchWnd), "Invalid window handle");
    ::SendMessage(mDispatchWnd, WM_CALLMETHOD, (WPARAM)0, (LPARAM)info);
}

class  nsWindow;

/**
 * Makes sure exit/enter mouse messages are always dispatched.
 * In the case where the mouse has exited the outer most window the
 * only way to tell if it has exited is to set a timer and look at the
 * mouse pointer to see if it is within the outer most window.
 */ 

class MouseTrailer 
{
public:
    static MouseTrailer  &GetSingleton() { return mSingleton; }
    
    nsWindow             *GetMouseTrailerWindow() { return mHoldMouseWindow; }
    nsWindow             *GetCaptureWindow() { return mCaptureWindow; }

    void                  SetMouseTrailerWindow(nsWindow * aNSWin);
    void                  SetCaptureWindow(nsWindow * aNSWin);
    void                  IgnoreNextCycle() { mIgnoreNextCycle = PR_TRUE; } 
    void                  DestroyTimer();
                          ~MouseTrailer();

private:
                          MouseTrailer();

    nsresult              CreateTimer();

    static void           TimerProc(nsITimer* aTimer, void* aClosure);

    // Global nsToolkit Instance
    static MouseTrailer   mSingleton;

    // information for mouse enter/exit events
    // last window
    nsWindow             *mHoldMouseWindow;
    nsWindow             *mCaptureWindow;
    PRBool                mIsInCaptureMode;
    PRBool                mIgnoreNextCycle;
    // timer
    nsCOMPtr<nsITimer>    mTimer;

};

#endif  // TOOLKIT_H