{%MainUnit customdrawnint.pas}

{******************************************************************************
  All utility method implementations of the TCarbonWidgetSet class are here.


 ******************************************************************************
 Implementation
 ******************************************************************************

 *****************************************************************************
  This file is part of the Lazarus Component Library (LCL)

  See the file COPYING.modifiedLGPL.txt, included in this distribution,
  for details about the license.
 *****************************************************************************
}

{ TCDWidgetSet }

function TCDWidgetSet.GetAppHandle: THandle;
begin
  Result := THandle(NSApp);
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppInit
  Params:  ScreenInfo

  Initialize Carbon Widget Set
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppInit(var ScreenInfo: TScreenInfo);
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppInit');
  {$ENDIF}

  if Application.ApplicationType = atDefault then
    Application.ApplicationType := atDesktop;

  if Application.LayoutAdjustmentPolicy = lapDefault then
    Application.LayoutAdjustmentPolicy := lapFixedLayout;

  Application.ExtendedKeysSupport := True;

  delegate:=TCDAppDelegate.alloc;

  { Creates the application NSApp object }
  NsApp := NSApplication.sharedApplication;
  NSApp.setDelegate(delegate);

  // Generic
  GenericAppInit();
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppRun
  Params:  ALoop
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppRun(const ALoop: TApplicationMainLoop);
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppRun');
  {$ENDIF}

  if LCLIntf.IsMobilePlatform() and (Application.MainForm <> nil) then
    TCDWSCustomForm.DoShowHide(Application.MainForm);

  { Enters main message loop }
  NSApp.run;
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppProcessMessages

  Handle all pending messages
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppProcessMessages;
var
  event : NSEvent;
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppProcessMessages');
  {$ENDIF}

  event:=NSApp.nextEventMatchingMask_untilDate_inMode_dequeue(NSAnyEventMask, nil, NSDefaultRunLoopMode, true);
  NSApp.sendEvent(event);

  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppProcessMessages END');
  {$ENDIF}
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppWaitMessage

  Passes execution control to Cocoa
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppWaitMessage;
var
  event : NSEvent;
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppWaitMessage');
  {$ENDIF}
  event:=NSApp.nextEventMatchingMask_untilDate_inMode_dequeue(NSAnyEventMask, NSDate.distantFuture, NSDefaultRunLoopMode, true);
  NSApp.sendEvent(event);
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.Create

  Constructor for the class
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.BackendCreate;
begin
  {  Creates the AutoreleasePool }
  pool := NSAutoreleasePool(NSAutoreleasePool.alloc).init;

  { Prepares the Native DC for the ScreenDC }

  { NSImage / NSBitmapImageRep are very limited. They simply don't support
    drawing to the image representation. You can draw to the NSImage, but
    that doesn't modify the raw pixels =(
    They also don't support us sending our own buffer. If we do so, then it
    will create another buffer internally and never draw to our own buffer.

    So CoreGraphics is the best choice here

    see: http://www.cocoabuilder.com/archive/cocoa/89523-drawing-into-nsbitmapimagerep.html

    CoreGraphics also has problems, it doesn't support non-premultiplied Alpha for example:

    see: http://lists.apple.com/archives/carbon-dev/2006/Jan/msg01055.html
  }
  ScreenBitmapWidth := Round(NSScreen.mainScreen.frame.size.width);
  ScreenBitmapHeight := Round(NSScreen.mainScreen.frame.size.height);
  ScreenBitmapRawImage.Description.Init_BPP32_A8R8G8B8_BIO_TTB(ScreenBitmapWidth, ScreenBitmapHeight);
  ScreenBitmapRawImage.CreateData(True);
  ScreenBitmapContext := CGBitmapContextCreate(
   ScreenBitmapRawImage.Data,
   ScreenBitmapWidth,
   ScreenBitmapHeight,
   8,
   ScreenBitmapWidth * 4,
   CGColorSpaceCreateDeviceRGB(),
   kCGImageAlphaNoneSkipFirst//,kCGImageAlphaPremultipliedFirst
   );
  ScreenImage := TLazIntfImage.Create(ScreenBitmapRawImage, True);
  ScreenDC := TLazCanvas.Create(ScreenImage);
  ScreenDC.NativeDC := PtrInt(TCocoaContext.Create);
  TCocoaContext(ScreenDC.NativeDC).cgctx := ScreenBitmapContext; //NSGraphicsContext.graphicsContextWithBitmapImageRep(ScreenBitmap.imagerep);
  ScreenFormat := clfRGB24UpsideDown;
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.Destroy

  Destructor for the class
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.BackendDestroy;
begin
  {  Releases the AutoreleasePool }
  pool.release;

  { Release the screen DC and Image }
  ScreenDC.Free;
  ScreenImage.Free;
//  ScreenBitmap.Free;
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppTerminate

  Tells Carbon to halt the application
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppTerminate;
begin
  if FTerminating then Exit;
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppTerminate');
  {$ENDIF}

  NSApp.terminate(nil);
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppMinimize

  Minimizes the whole application to the taskbar
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppMinimize;
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppMinimize');
  {$ENDIF}
  NSApp.miniaturizeAll(nil);
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppRestore

  Restores the whole minimized application from the taskbar
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppRestore;
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppRestore');
  {$ENDIF}
  NSApp.activateIgnoringOtherApps(False);
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppBringToFront

  Brings the entire application on top of all other non-topmost programs
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppBringToFront;
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.AppBringToFront');
  {$ENDIF}
  NSApp.activateIgnoringOtherApps(True);
end;

procedure TCDWidgetSet.AppSetIcon(const Small, Big: HICON);
begin
  if Big <> 0 then
    NSApp.setApplicationIconImage(TCocoaBitmap(Big).image)
  else
    NSApp.setApplicationIconImage(nil);
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.AppSetTitle
  Params:  ATitle - New application title

  Changes the application title
 ------------------------------------------------------------------------------}
procedure TCDWidgetSet.AppSetTitle(const ATitle: string);
var
  ns: NSString;
begin
{  if not Assigned(NSApp.dockTile) then Exit;
  //todo: setBadgeLabel is for 10.5 only, should be removed
  if NSApp.dockTile.respondsToSelector_(objcselector('setBadgeLabel:')) then
  begin
    ns := NSStringUtf8(ATitle);
    NSApp.dockTile.setBadgeLabel(NSStringUtf8(ATitle));
    ns.release;
  end;}
end;

procedure TCDWidgetSet.AppSetVisible(const AVisible: Boolean);
begin
end;

function TCDWidgetSet.AppRemoveStayOnTopFlags(const ASystemTopAlso: Boolean = False): Boolean;
begin
end;

function TCDWidgetSet.AppRestoreStayOnTopFlags(const ASystemTopAlso: Boolean = False): Boolean;
begin
end;

procedure TCDWidgetSet.AppSetMainFormOnTaskBar(const DoSet: Boolean);
begin

end;

function TCDWidgetSet.CreateTimer(Interval: integer; TimerFunc: TWSTimerProc): THandle;
var
  timer : NSTimer;
  user  : TCDTimerObject;
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.CreateTimer');
  {$ENDIF}
  user:=TCDTimerObject.initWithFunc(TimerFunc);

  timer:=NSTimer.timerWithTimeInterval_target_selector_userInfo_repeats(
    Interval/1000, user, objcselector(user.timerEvent), user, True);

  NSRunLoop.currentRunLoop.addTimer_forMode(timer, NSDefaultRunLoopMode);

  {user is retained (twice, because it's target), by the timer and }
  {released (twice) on timer invalidation}
  user.release;

  Result:=THandle(timer);
end;

function TCDWidgetSet.DestroyTimer(TimerHandle: THandle): boolean;
var
  obj : NSObject;
begin
  {$IFDEF VerboseObject}
    DebugLn('TCDWidgetSet.DestroyTimer');
  {$ENDIF}
  obj:=NSObject(TimerHandle);
  try
    Result:= Assigned(obj) and obj.isKindOfClass_(NSTimer);
  except
    Result:=false;
  end;
  if not Result then Exit;
  NSTimer(obj).invalidate;
end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.GetAppHandle
  Returns: Returns NSApp object, created via NSApplication.sharedApplication
 ------------------------------------------------------------------------------}
(*function TCDWidgetSet.GetAppHandle: THandle;
begin
  Result:=THandle(NSApp);
end;

function TCDWidgetSet.DCGetPixel(CanvasHandle: HDC; X, Y: integer): TGraphicsColor;
begin
  Result:=0;
end;

procedure TCDWidgetSet.DCSetPixel(CanvasHandle: HDC; X, Y: integer; AColor: TGraphicsColor);
begin

end;

procedure TCDWidgetSet.DCRedraw(CanvasHandle: HDC);
begin

end;

procedure TCDWidgetSet.DCSetAntialiasing(CanvasHandle: HDC; AEnabled: Boolean);
begin
  inherited DCSetAntialiasing(CanvasHandle, AEnabled);
end;

procedure TCDWidgetSet.SetDesigning(AComponent: TComponent);
begin

end;

{------------------------------------------------------------------------------
  Method:  TCDWidgetSet.LCLPlatform
  Returns: lpCocoa - enum value for Cocoa widgetset
 ------------------------------------------------------------------------------}
function TCDWidgetSet.LCLPlatform: TLCLPlatform;
begin
  Result:= lpCocoa;
end;

procedure InternalInit;
begin
end;

procedure InternalFinal;
begin
  if Assigned(ScreenContext) then ScreenContext.Free;
end;*)

{ TCDAppDelegate }

function TCDAppDelegate.applicationShouldTerminate(sender: NSApplication): NSApplicationTerminateReply;
begin
  Result := NSTerminateNow;
end;

{ TCDTimerObject }

procedure TCDTimerObject.timerEvent;
begin
  if Assigned(@func) then func;
end;

class function TCDTimerObject.initWithFunc(afunc: TWSTimerProc): TCDTimerObject;
begin
  Result:=alloc;
  Result.func:=afunc;
end;

{------------------------------------------------------------------------------
  Method:  TCarbonWidgetSet.RawImage_DescriptionFromCarbonBitmap

  Creates a rawimage description for a carbonbitmap
 ------------------------------------------------------------------------------}
(*function TCDWidgetSet.RawImage_DescriptionFromCocoaBitmap(out ADesc: TRawImageDescription; ABitmap: TCDBitmap): Boolean;
var
  Prec, Shift, BPR: Byte;
  AlphaInfo: CGImageAlphaInfo;
begin
  ADesc.Init;

  case ABitmap.BitmapType of
    cbtMono, cbtGray: ADesc.Format := ricfGray;
  else
    ADesc.Format := ricfRGBA;
  end;

{  ADesc.Width := CGImageGetWidth(ABitmap.CGImage);
  ADesc.Height := CGImageGetHeight(ABitmap.CGImage);

  //ADesc.PaletteColorCount := 0;

  ADesc.BitOrder := riboReversedBits;
  ADesc.ByteOrder := riboMSBFirst;

  BPR := CGImageGetBytesPerRow(ABitmap.CGImage) and $FF;
  if BPR and $F = 0 then ADesc.LineEnd := rileDQWordBoundary     // 128bit aligned
  else if BPR and $7 = 0 then ADesc.LineEnd := rileQWordBoundary //  64bit aligned
  else if BPR and $3 = 0 then ADesc.LineEnd := rileWordBoundary  //  32bit aligned
  else if BPR and $1 = 0 then ADesc.LineEnd := rileByteBoundary  //   8bit aligned
  else ADesc.LineEnd := rileTight;

  ADesc.LineOrder := riloTopToBottom;
  ADesc.BitsPerPixel := CGImageGetBitsPerPixel(ABitmap.CGImage);

  ADesc.MaskBitOrder := riboReversedBits;
  ADesc.MaskBitsPerPixel := 1;
  ADesc.MaskLineEnd := rileByteBoundary;
  // ADesc.MaskShift := 0;

  Prec := CGImageGetBitsPerComponent(ABitmap.CGImage) and $FF;
  AlphaInfo := CGImageGetAlphaInfo(ABitmap.CGImage);

  if AlphaInfo <> kCGImageAlphaOnly
  then begin
    ADesc.RedPrec := Prec;
    ADesc.GreenPrec := Prec;
    ADesc.BluePrec := Prec;
  end;

  // gray or mono
  if ADesc.Format = ricfGray then Exit;

  // alpha
  case AlphaInfo of
    kCGImageAlphaNone,
    kCGImageAlphaNoneSkipLast,
    kCGImageAlphaNoneSkipFirst: begin
      ADesc.Depth := Prec * 3;
      // ADesc.AlphaPrec := 0;
    end;
  else
    ADesc.Depth := Prec * 4;
    ADesc.AlphaPrec := Prec;
  end;

  case AlphaInfo of
    kCGImageAlphaNone,
    kCGImageAlphaNoneSkipLast: begin
      // RGBx
      Shift := 32 - Prec;
      ADesc.RedShift := Shift;
      Dec(Shift, Prec);
      ADesc.GreenShift := Shift;
      Dec(Shift, Prec);
      ADesc.BlueShift := Shift;
    end;
    kCGImageAlphaNoneSkipFirst: begin
      // xRGB
      Shift := 0;
      ADesc.BlueShift := Shift;
      Inc(Shift, Prec);
      ADesc.GreenShift := Shift;
      Inc(Shift, Prec);
      ADesc.RedShift := Shift;
    end;
    kCGImageAlphaPremultipliedFirst,
    kCGImageAlphaFirst: begin
      // ARGB
      Shift := 32 - Prec;
      ADesc.AlphaShift := Shift;
      Dec(Shift, Prec);
      ADesc.RedShift := Shift;
      Dec(Shift, Prec);
      ADesc.GreenShift := Shift;
      Dec(Shift, Prec);
      ADesc.BlueShift := Shift;
    end;
    kCGImageAlphaPremultipliedLast,
    kCGImageAlphaLast: begin
      // RGBA
      Shift := 32 - Prec;
      ADesc.RedShift := Shift;
      Dec(Shift, Prec);
      ADesc.GreenShift := Shift;
      Dec(Shift, Prec);
      ADesc.BlueShift := Shift;
      Dec(Shift, Prec);
      ADesc.AlphaShift := Shift;
    end;
    kCGImageAlphaOnly: begin
      // A
      //ADesc.AlphaShift := 0;
    end;
  end;

  Result := True;}
end;

{------------------------------------------------------------------------------
  Method:  TCarbonWidgetSet.RawImage_FromCarbonBitmap

  Creates a rawimage description for a carbonbitmap
 ------------------------------------------------------------------------------}
function TCDWidgetSet.RawImage_FromCocoaBitmap(out ARawImage: TRawImage; ABitmap, AMask: TCDBitmap; ARect: PRect = nil): Boolean;
begin
  FillChar(ARawImage, SizeOf(ARawImage), 0);
  RawImage_DescriptionFromCocoaBitmap(ARawImage.Description, ABitmap);

  ARawImage.DataSize := ABitmap.DataSize;
  ReAllocMem(ARawImage.Data, ARawImage.DataSize);
  if ARawImage.DataSize > 0 then
    System.Move(ABitmap.Data^, ARawImage.Data^, ARawImage.DataSize);

  Result := True;

  if AMask = nil then
  begin
    ARawImage.Description.MaskBitsPerPixel := 0;
    Exit;
  end;

  if AMask.Depth > 1
  then begin
    DebugLn('[WARNING] RawImage_FromCarbonBitmap: AMask.Depth > 1');
    Exit;
  end;

  ARawImage.MaskSize := AMask.DataSize;
  ReAllocMem(ARawImage.Mask, ARawImage.MaskSize);
  if ARawImage.MaskSize > 0 then
    System.Move(AMask.Data^, ARawImage.Mask^, ARawImage.MaskSize);
end;

function TCDWidgetSet.RawImage_DescriptionToBitmapType(
  ADesc: TRawImageDescription;
  out bmpType: TCDBitmapType): Boolean;
begin
  Result := False;

  if ADesc.Format = ricfGray
  then
  begin
    if ADesc.Depth = 1 then bmpType := cbtMono
    else bmpType := cbtGray;
  end
  else if ADesc.Depth = 1
  then bmpType := cbtMono
  else if ADesc.AlphaPrec <> 0
  then begin
    if ADesc.ByteOrder = riboMSBFirst
    then begin
      if  (ADesc.AlphaShift = 24)
      and (ADesc.RedShift   = 16)
      and (ADesc.GreenShift = 8 )
      and (ADesc.BlueShift  = 0 )
      then bmpType := cbtARGB
      else
      if  (ADesc.AlphaShift = 0)
      and (ADesc.RedShift   = 24)
      and (ADesc.GreenShift = 16 )
      and (ADesc.BlueShift  = 8 )
      then bmpType := cbtRGBA
      else
      if  (ADesc.AlphaShift = 0 )
      and (ADesc.RedShift   = 8 )
      and (ADesc.GreenShift = 16)
      and (ADesc.BlueShift  = 24)
      then bmpType := cbtBGRA
      else Exit;
    end
    else begin
      if  (ADesc.AlphaShift = 24)
      and (ADesc.RedShift   = 16)
      and (ADesc.GreenShift = 8 )
      and (ADesc.BlueShift  = 0 )
      then bmpType := cbtBGRA
      else
      if  (ADesc.AlphaShift = 0 )
      and (ADesc.RedShift   = 8 )
      and (ADesc.GreenShift = 16)
      and (ADesc.BlueShift  = 24)
      then bmpType := cbtARGB
      else
      if  (ADesc.AlphaShift = 24 )
      and (ADesc.RedShift   = 0 )
      and (ADesc.GreenShift = 8)
      and (ADesc.BlueShift  = 16)
      then bmpType := cbtRGBA
      else Exit;
    end;
  end
  else begin
    bmpType := cbtRGB;
  end;

  Result := True;
end;*)