/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 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):
 *   Josh Aas <josh@mozilla.com>
 *   Colin Barrett <cbarrett@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * 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"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsCocoaWindow_h_
#define nsCocoaWindow_h_

#undef DARWIN

#import <Cocoa/Cocoa.h>

#include "nsBaseWidget.h"
#include "nsPIWidgetCocoa.h"
#include "nsAutoPtr.h"

class nsCocoaWindow;
class nsChildView;
class nsMenuBarX;

typedef struct _nsCocoaWindowList {
  _nsCocoaWindowList() : prev(NULL), window(NULL) {}
  struct _nsCocoaWindowList *prev;
  nsCocoaWindow *window; // Weak
} nsCocoaWindowList;

// NSWindow subclass that is the base class for all of our own window classes.
// This class handles the storage of those settings that need to be persisted
// across window destruction and reconstruction, i.e. when switching to and from
// fullscreen mode.
// We don't save shadow, transparency mode or background color because it's not
// worth the hassle - Gecko will reset them anyway as soon as the window is
// resized.
@interface BaseWindow : NSWindow
{
  NSMutableDictionary* mState;
  NSColor* mActiveTitlebarColor;
  NSColor* mInactiveTitlebarColor;
}

- (void)importState:(NSDictionary*)aState;
- (NSMutableDictionary*)exportState;
- (void)setTitlebarColor:(NSColor*)aColor forActiveWindow:(BOOL)aActive;
- (NSColor*)titlebarColorForActiveWindow:(BOOL)aActive;

@end

@interface NSWindow (Undocumented)

// If a window has been explicitly removed from the "window cache" (to
// deactivate it), it's sometimes necessary to "reset" it to reactivate it
// (and put it back in the "window cache").  One way to do this, which Apple
// often uses, is to set the "window number" to '-1' and then back to its
// original value.
- (void)_setWindowNumber:(int)aNumber;

// If we set the window's stylemask to be textured, the corners on the bottom of
// the window are rounded by default. We use this private method to make
// the corners square again, a la Safari.
- (void)setBottomCornerRounded:(BOOL)rounded;

@end

@interface PopupWindow : BaseWindow
{
@private
  BOOL mIsContextMenu;
}

- (id)initWithContentRect:(NSRect)contentRect styleMask:(unsigned int)styleMask
      backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation;
- (BOOL)isContextMenu;
- (void)setIsContextMenu:(BOOL)flag;

@end

@interface BorderlessWindow : BaseWindow
{
}

- (BOOL)canBecomeKeyWindow;
- (BOOL)canBecomeMainWindow;

@end

@interface WindowDelegate : NSObject
{
  nsCocoaWindow* mGeckoWindow; // [WEAK] (we are owned by the window)
  // Used to avoid duplication when we send NS_ACTIVATE and
  // NS_DEACTIVATE to Gecko for toplevel widgets.  Starts out
  // PR_FALSE.
  PRBool mToplevelActiveState;
  BOOL mHasEverBeenZoomed;
}
+ (void)paintMenubarForWindow:(NSWindow*)aWindow;
- (id)initWithGeckoWindow:(nsCocoaWindow*)geckoWind;
- (void)windowDidResize:(NSNotification*)aNotification;
- (void)sendFocusEvent:(PRUint32)eventType;
- (nsCocoaWindow*)geckoWidget;
- (PRBool)toplevelActiveState;
- (void)sendToplevelActivateEvents;
- (void)sendToplevelDeactivateEvents;
@end

struct UnifiedGradientInfo {
  float titlebarHeight;
  float toolbarHeight;
  BOOL windowIsMain;
  BOOL drawTitlebar; // NO for toolbar, YES for titlebar
};

@class ToolbarWindow;

// NSColor subclass that allows us to draw separate colors both in the titlebar 
// and for background of the window.
@interface TitlebarAndBackgroundColor : NSColor
{
  ToolbarWindow *mWindow; // [WEAK] (we are owned by the window)
}

- (id)initWithWindow:(ToolbarWindow*)aWindow;

@end

// NSWindow subclass for handling windows with toolbars.
@interface ToolbarWindow : BaseWindow
{
  TitlebarAndBackgroundColor *mColor;
  float mUnifiedToolbarHeight;
  NSColor *mBackgroundColor;
}
// Pass nil here to get the default appearance.
- (void)setTitlebarColor:(NSColor*)aColor forActiveWindow:(BOOL)aActive;
- (void)setUnifiedToolbarHeight:(float)aToolbarHeight;
- (float)unifiedToolbarHeight;
- (float)titlebarHeight;
@end

class nsCocoaWindow : public nsBaseWidget, public nsPIWidgetCocoa
{
private:
  
  typedef nsBaseWidget Inherited;

public:

    nsCocoaWindow();
    virtual ~nsCocoaWindow();

    NS_DECL_ISUPPORTS_INHERITED
    NS_DECL_NSPIWIDGETCOCOA
      
    NS_IMETHOD              Create(nsIWidget* aParent,
                                   nsNativeWidget aNativeParent,
                                   const nsIntRect &aRect,
                                   EVENT_CALLBACK aHandleEventFunction,
                                   nsIDeviceContext *aContext,
                                   nsIAppShell *aAppShell = nsnull,
                                   nsIToolkit *aToolkit = nsnull,
                                   nsWidgetInitData *aInitData = nsnull);

    NS_IMETHOD              Destroy();

    NS_IMETHOD              Show(PRBool aState);
    virtual nsIWidget*      GetSheetWindowParent(void);
    NS_IMETHOD              AddEventListener(nsIEventListener * aListener);
    NS_IMETHOD              Enable(PRBool aState);
    NS_IMETHOD              IsEnabled(PRBool *aState);
    NS_IMETHOD              SetModal(PRBool aState);
    NS_IMETHOD              IsVisible(PRBool & aState);
    NS_IMETHOD              SetFocus(PRBool aState=PR_FALSE);
    virtual nsIntPoint WidgetToScreenOffset();
    
    virtual void* GetNativeData(PRUint32 aDataType) ;

    NS_IMETHOD              ConstrainPosition(PRBool aAllowSlop,
                                              PRInt32 *aX, PRInt32 *aY);
    NS_IMETHOD              Move(PRInt32 aX, PRInt32 aY);
    NS_IMETHOD              PlaceBehind(nsTopLevelWidgetZPlacement aPlacement,
                                        nsIWidget *aWidget, PRBool aActivate);
    NS_IMETHOD              SetSizeMode(PRInt32 aMode);
    NS_IMETHOD              HideWindowChrome(PRBool aShouldHide);
    NS_IMETHOD              MakeFullScreen(PRBool aFullScreen);
    NS_IMETHOD              Resize(PRInt32 aWidth,PRInt32 aHeight, PRBool aRepaint);
    NS_IMETHOD              Resize(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint);
    NS_IMETHOD              GetScreenBounds(nsIntRect &aRect);
    virtual PRBool          OnPaint(nsPaintEvent &event);
    void                    ReportSizeEvent(NSRect *overrideRect = nsnull);
    NS_IMETHOD              SetCursor(nsCursor aCursor);
    NS_IMETHOD              SetCursor(imgIContainer* aCursor, PRUint32 aHotspotX, PRUint32 aHotspotY);

    NS_IMETHOD              SetTitle(const nsAString& aTitle);

    NS_IMETHOD Invalidate(const nsIntRect &aRect, PRBool aIsSynchronous);
    NS_IMETHOD Invalidate(PRBool aIsSynchronous);
    NS_IMETHOD Update();
    virtual nsresult ConfigureChildren(const nsTArray<Configuration>& aConfigurations);
    virtual void Scroll(const nsIntPoint& aDelta,
                        const nsTArray<nsIntRect>& aDestRects,
                        const nsTArray<Configuration>& aConfigurations);
    NS_IMETHOD DispatchEvent(nsGUIEvent* event, nsEventStatus & aStatus) ;
    NS_IMETHOD CaptureRollupEvents(nsIRollupListener * aListener, PRBool aDoCapture, PRBool aConsumeRollupEvent);
    NS_IMETHOD GetAttention(PRInt32 aCycleCount);
    virtual PRBool HasPendingInputEvent();
    virtual nsTransparencyMode GetTransparencyMode();
    virtual void SetTransparencyMode(nsTransparencyMode aMode);
    NS_IMETHOD SetWindowShadowStyle(PRInt32 aStyle);
    virtual void SetShowsToolbarButton(PRBool aShow);
    NS_IMETHOD SetWindowTitlebarColor(nscolor aColor, PRBool aActive);

    void DispatchSizeModeEvent();

    virtual gfxASurface* GetThebesSurface();

    // be notified that a some form of drag event needs to go into Gecko
    virtual PRBool DragEvent(unsigned int aMessage, Point aMouseGlobal, UInt16 aKeyModifiers);

    // Helpers to prevent recursive resizing during live-resize
    PRBool IsResizing () const { return mIsResizing; }
    void StartResizing () { mIsResizing = PR_TRUE; }
    void StopResizing () { mIsResizing = PR_FALSE; }

    PRBool HasModalDescendents() { return mNumModalDescendents > 0; }
    NSWindow *GetCocoaWindow() { return mWindow; }

    void SetMenuBar(nsMenuBarX* aMenuBar);
    nsMenuBarX *GetMenuBar();

    // nsIKBStateControl interface
    NS_IMETHOD ResetInputState();
    
    void MakeBackgroundTransparent(PRBool aTransparent);

    NS_IMETHOD BeginSecureKeyboardInput();
    NS_IMETHOD EndSecureKeyboardInput();

    static void UnifiedShading(void* aInfo, const float* aIn, float* aOut);

protected:

  nsresult             CreateNativeWindow(const NSRect &aRect,
                                          nsBorderStyle aBorderStyle,
                                          PRBool aRectIsFrameRect);
  nsresult             CreatePopupContentView(const nsIntRect &aRect,
                                              EVENT_CALLBACK aHandleEventFunction,
                                              nsIDeviceContext *aContext,
                                              nsIAppShell *aAppShell,
                                              nsIToolkit *aToolkit);
  void                 DestroyNativeWindow();

  nsIWidget*           mParent;         // if we're a popup, this is our parent [WEAK]
  BaseWindow*          mWindow;         // our cocoa window [STRONG]
  WindowDelegate*      mDelegate;       // our delegate for processing window msgs [STRONG]
  nsRefPtr<nsMenuBarX> mMenuBar;
  NSWindow*            mSheetWindowParent; // if this is a sheet, this is the NSWindow it's attached to
  nsChildView*         mPopupContentView; // if this is a popup, this is its content widget

  PRPackedBool         mIsResizing;     // we originated the resize, prevent infinite recursion
  PRPackedBool         mWindowMadeHere; // true if we created the window, false for embedding
  PRPackedBool         mSheetNeedsShow; // if this is a sheet, are we waiting to be shown?
                                        // this is used for sibling sheet contention only
  PRPackedBool         mFullScreen;
  PRPackedBool         mModal;

  PRInt32              mNumModalDescendents;
};

#endif // nsCocoaWindow_h_
