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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_vcl.hxx"
#include "aqua_clipboard.hxx"

#include "DataFlavorMapping.hxx"
#include "OSXTransferable.hxx"

#include "vcl/unohelp.hxx"

#include "comphelper/makesequence.hxx"

#include <boost/assert.hpp>

using namespace com::sun::star::datatransfer;
using namespace com::sun::star::datatransfer::clipboard;
using namespace com::sun::star::lang;
using namespace com::sun::star::uno;
using namespace cppu;
using namespace osl;
using namespace rtl;
using namespace std;
using namespace comphelper;


@implementation EventListener;

-(EventListener*)initWithAquaClipboard: (AquaClipboard*) pcb
{ 
    self = [super init];
    
    if (self)
        pAquaClipboard = pcb;
    
    return self;
}

-(void)pasteboard:(NSPasteboard*)sender provideDataForType:(NSString*)type
{
    if( pAquaClipboard )
        pAquaClipboard->provideDataForType(sender, type);
}

-(void)applicationDidBecomeActive:(NSNotification*)aNotification
{
    if( pAquaClipboard )
        pAquaClipboard->applicationDidBecomeActive(aNotification);
}

-(void)disposing
{
    pAquaClipboard = NULL;
}

@end


OUString clipboard_getImplementationName()
{
  return OUString(RTL_CONSTASCII_USTRINGPARAM("com.sun.star.datatransfer.clipboard.AquaClipboard"));
}

Sequence<OUString> clipboard_getSupportedServiceNames()
{
  return makeSequence(OUString(RTL_CONSTASCII_USTRINGPARAM("com.sun.star.datatransfer.clipboard.SystemClipboard")));
}


AquaClipboard::AquaClipboard(NSPasteboard* pasteboard, bool bUseSystemPasteboard) :
  WeakComponentImplHelper4<XClipboardEx, XClipboardNotifier, XFlushableClipboard, XServiceInfo>(m_aMutex),
  mIsSystemPasteboard(bUseSystemPasteboard)
{
    Reference<XMultiServiceFactory> mrServiceMgr = vcl::unohelper::GetMultiServiceFactory();

    mrXMimeCntFactory = Reference<XMimeContentTypeFactory>(mrServiceMgr->createInstance(
	 OUString(RTL_CONSTASCII_USTRINGPARAM("com.sun.star.datatransfer.MimeContentTypeFactory"))), UNO_QUERY);

  if (!mrXMimeCntFactory.is())
	{	
	  throw RuntimeException(OUString(
			RTL_CONSTASCII_USTRINGPARAM("AquaClipboard: Cannot create com.sun.star.datatransfer.MimeContentTypeFactory")), 
			static_cast<XClipboardEx*>(this));
	}

  mpDataFlavorMapper = DataFlavorMapperPtr_t(new DataFlavorMapper());

  if (pasteboard != NULL)
	{
	  mPasteboard = pasteboard;
	  mIsSystemPasteboard = false;
	}
  else
	{
	  mPasteboard = bUseSystemPasteboard ? [NSPasteboard generalPasteboard] : 
		[NSPasteboard pasteboardWithName: NSDragPboard];

	  if (mPasteboard == nil)
		{	
		  throw RuntimeException(OUString(
				RTL_CONSTASCII_USTRINGPARAM("AquaClipboard: Cannot create Cocoa pasteboard")), 
				static_cast<XClipboardEx*>(this));
		}
	}

  [mPasteboard retain];

  mEventListener = [[EventListener alloc] initWithAquaClipboard: this];

  if (mEventListener == nil)
	{
	  [mPasteboard release];

	  throw RuntimeException(
			OUString(RTL_CONSTASCII_USTRINGPARAM("AquaClipboard: Cannot create pasteboard change listener")), 
			static_cast<XClipboardEx*>(this));
	}

  if (mIsSystemPasteboard)
	{
	  NSNotificationCenter* notificationCenter = [NSNotificationCenter defaultCenter];

	  [notificationCenter addObserver: mEventListener 
	   selector: @selector(applicationDidBecomeActive:) 
	   name: @"NSApplicationDidBecomeActiveNotification" 
	   object: [NSApplication sharedApplication]]; 
	}

  mPasteboardChangeCount = [mPasteboard changeCount];
}


AquaClipboard::~AquaClipboard()
{
  if (mIsSystemPasteboard) 
	{
	  [[NSNotificationCenter defaultCenter] removeObserver: mEventListener];
	}

  [mEventListener disposing];
  [mEventListener release];
  [mPasteboard release];
}


Reference<XTransferable> SAL_CALL AquaClipboard::getContents() throw(RuntimeException)
{
  MutexGuard aGuard(m_aMutex);
  
  // Shortcut: If we are clipboard owner already we don't need 
  // to drag the data through the system clipboard
  if (mXClipboardContent.is())
	{
	  return mXClipboardContent;
	}

  return Reference<XTransferable>(new OSXTransferable(mrXMimeCntFactory, 
													  mpDataFlavorMapper, 
													  mPasteboard));
}


void SAL_CALL AquaClipboard::setContents(const Reference<XTransferable>& xTransferable, 
    const Reference<XClipboardOwner>& xClipboardOwner) 
        throw( RuntimeException )
{
    NSArray* types = xTransferable.is() ?
        mpDataFlavorMapper->flavorSequenceToTypesArray(xTransferable->getTransferDataFlavors()) :
        [NSArray array];

    ClearableMutexGuard aGuard(m_aMutex);
    
    Reference<XClipboardOwner> oldOwner(mXClipboardOwner);
    mXClipboardOwner = xClipboardOwner;
    
    Reference<XTransferable> oldContent(mXClipboardContent);
    mXClipboardContent = xTransferable;
    
    mPasteboardChangeCount = [mPasteboard declareTypes: types owner: mEventListener];

    aGuard.clear();
    
    // if we are already the owner of the clipboard
    // then fire lost ownership event
    if (oldOwner.is())
	{
        fireLostClipboardOwnershipEvent(oldOwner, oldContent);
	}
    
    fireClipboardChangedEvent();
}


OUString SAL_CALL AquaClipboard::getName() throw( RuntimeException )
{
  return OUString();
}


sal_Int8 SAL_CALL AquaClipboard::getRenderingCapabilities() throw( RuntimeException )
{
	return 0;
}


void SAL_CALL AquaClipboard::addClipboardListener(const Reference< XClipboardListener >& listener) 
  throw( RuntimeException )
{
  MutexGuard aGuard(m_aMutex);
  
  if (!listener.is())
 	throw IllegalArgumentException(OUString(RTL_CONSTASCII_USTRINGPARAM("empty reference")), 
								   static_cast<XClipboardEx*>(this), 1);
  
  mClipboardListeners.push_back(listener);
}


void SAL_CALL AquaClipboard::removeClipboardListener(const Reference< XClipboardListener >& listener) 
  throw( RuntimeException )
{
  MutexGuard aGuard(m_aMutex);

  if (!listener.is())
 	throw IllegalArgumentException(OUString(RTL_CONSTASCII_USTRINGPARAM("empty reference")), 
								   static_cast<XClipboardEx*>(this), 1);

  mClipboardListeners.remove(listener);
}


void AquaClipboard::applicationDidBecomeActive(NSNotification*)
{
  ClearableMutexGuard aGuard(m_aMutex);

  int currentPboardChgCount = [mPasteboard changeCount];

  if (currentPboardChgCount != mPasteboardChangeCount)
	{
	  mPasteboardChangeCount = currentPboardChgCount;

	  // Clear clipboard content and owner and send lostOwnership
	  // notification to the old clipboard owner as well as
	  // ClipboardChanged notification to any clipboard listener
	  Reference<XClipboardOwner> oldOwner(mXClipboardOwner);
	  mXClipboardOwner = Reference<XClipboardOwner>();

	  Reference<XTransferable> oldContent(mXClipboardContent);
	  mXClipboardContent = Reference<XTransferable>();

      aGuard.clear();

	  if (oldOwner.is())
		{
		  fireLostClipboardOwnershipEvent(oldOwner, oldContent);
		}

	  fireClipboardChangedEvent();
	}
}


void AquaClipboard::fireClipboardChangedEvent()
{
    ClearableMutexGuard aGuard(m_aMutex);

    list<Reference< XClipboardListener > > listeners(mClipboardListeners);
	ClipboardEvent aEvent;

	if (listeners.begin() != listeners.end())
	  {
		aEvent = ClipboardEvent(static_cast<OWeakObject*>(this), getContents());
	  }

    aGuard.clear();

    while (listeners.begin() != listeners.end())
    {
        if (listeners.front().is())
		  {
			try { listeners.front()->changedContents(aEvent); }
			catch (RuntimeException&) { }
		  }
        listeners.pop_front();
    }
}


void AquaClipboard::fireLostClipboardOwnershipEvent(Reference<XClipboardOwner> oldOwner, Reference<XTransferable> oldContent)
{
  BOOST_ASSERT(oldOwner.is());

  try { oldOwner->lostOwnership(static_cast<XClipboardEx*>(this), oldContent); }
  catch(RuntimeException&) { }	
}


void AquaClipboard::provideDataForType(NSPasteboard* sender, NSString* type)
{
    if( mXClipboardContent.is() )
    {
        DataProviderPtr_t dp = mpDataFlavorMapper->getDataProvider(type, mXClipboardContent);
        NSData* pBoardData = NULL;
        
        if (dp.get() != NULL)
        {
            pBoardData = (NSData*)dp->getSystemData();      
            [sender setData: pBoardData forType: type];
        }
    }
}


//------------------------------------------------
// XFlushableClipboard
//------------------------------------------------
	
void SAL_CALL AquaClipboard::flushClipboard() 
  throw(RuntimeException)
{
    if (mXClipboardContent.is())
	{
	  	Sequence<DataFlavor> flavorList = mXClipboardContent->getTransferDataFlavors();	
		sal_uInt32 nFlavors = flavorList.getLength();
		
		for (sal_uInt32 i = 0; i < nFlavors; i++)
		{
			NSString* sysType = mpDataFlavorMapper->openOfficeToSystemFlavor(flavorList[i]);
			
			if (sysType != NULL)
			{
				provideDataForType(mPasteboard, sysType);
			}
		}
		mXClipboardContent.clear();
	}
}


NSPasteboard* AquaClipboard::getPasteboard() const
{
  return mPasteboard;
}


//-------------------------------------------------
// XServiceInfo
//-------------------------------------------------

OUString SAL_CALL AquaClipboard::getImplementationName() throw( RuntimeException )
{
  return clipboard_getImplementationName();
}


sal_Bool SAL_CALL AquaClipboard::supportsService( const OUString& /*ServiceName*/ ) throw( RuntimeException )
{
	return sal_False;
}


Sequence< OUString > SAL_CALL AquaClipboard::getSupportedServiceNames() throw( RuntimeException )
{
  return clipboard_getSupportedServiceNames();
}