/* TrackList.c */
/*****************************************************************************/
/*                                                                           */
/*    Out Of Phase:  Digital Music Synthesis on General Purpose Computers    */
/*    Copyright (C) 1994  Thomas R. Lawrence                                 */
/*                                                                           */
/*    This program is free software; you can redistribute it and/or modify   */
/*    it under the terms of the GNU General Public License as published by   */
/*    the Free Software Foundation; either version 2 of the License, or      */
/*    (at your option) any later version.                                    */
/*                                                                           */
/*    This program is distributed in the hope that it will be useful,        */
/*    but WITHOUT ANY WARRANTY; without even the implied warranty of         */
/*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          */
/*    GNU General Public License for more details.                           */
/*                                                                           */
/*    You should have received a copy of the GNU General Public License      */
/*    along with this program; if not, write to the Free Software            */
/*    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.              */
/*                                                                           */
/*    Thomas R. Lawrence can be reached at tomlaw@world.std.com.             */
/*                                                                           */
/*****************************************************************************/

#include "MiscInfo.h"
#include "Audit.h"
#include "Debug.h"
#include "Definitions.h"

#include "TrackList.h"
#include "StringList.h"
#include "Array.h"
#include "Memory.h"
#include "TrackObject.h"
#include "Alert.h"
#include "DataMunging.h"
#include "Menus.h"
#include "BufferedFileInput.h"
#include "BufferedFileOutput.h"
#include "Files.h"
#include "Scrap.h"
#include "TrackBackgroundSaver.h"


struct TrackListRec
	{
		StringListRec*					List;
		struct CodeCenterRec*		CodeCenter;
		struct MainWindowRec*		MainWindow;
		ArrayRec*								TrackArray;
		MyBoolean								TrackListChanged;
		MenuType*								TrackMenu;
	};


#define MAGICSCRAPSTRING ("\xff\x00\x1f\xfe TrackObjectScrap")


/* create a new track list */
TrackListRec*				NewTrackList(struct MainWindowRec* MainWindow,
											struct CodeCenterRec* CodeCenter, WinType* ScreenID,
											OrdType XLoc, OrdType YLoc, OrdType Width, OrdType Height)
	{
		TrackListRec*			TrackList;

		TrackList = (TrackListRec*)AllocPtrCanFail(sizeof(TrackListRec),"TrackListRec");
		if (TrackList == NIL)
			{
			 FailurePoint1:
				return NIL;
			}
		TrackList->TrackArray = NewArray();
		if (TrackList->TrackArray == NIL)
			{
			 FailurePoint2:
				ReleasePtr((char*)TrackList);
				goto FailurePoint1;
			}
		TrackList->List = NewStringList(ScreenID,XLoc,YLoc,Width,Height,
			GetScreenFont(),9,StringListDontAllowMultipleSelection,"Tracks");
		if (TrackList->List == NIL)
			{
			 FailurePoint3:
				DisposeArray(TrackList->TrackArray);
				goto FailurePoint2;
			}
		TrackList->TrackMenu = MakeNewMenu("Tracks");
		if (TrackList->TrackMenu == NIL)
			{
			 FailurePoint4:
				DisposeStringList(TrackList->List);
				goto FailurePoint3;
			}
		TrackList->CodeCenter = CodeCenter;
		TrackList->MainWindow = MainWindow;
		TrackList->TrackListChanged = False;
		return TrackList;
	}


/* delete the track list and all of the tracks it contains */
void								DisposeTrackList(TrackListRec* TrackList)
	{
		CheckPtrExistence(TrackList);
		while (ArrayGetLength(TrackList->TrackArray) > 0)
			{
				TrackObjectRec*		TrackTemp;

				TrackTemp = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,0);
				/* we remove it from the array since deleting it may cause a callback */
				/* to tell others that it is being deleted, so we don't want to have */
				/* nonexistent objects in our array */
				ArrayDeleteElement(TrackList->TrackArray,0);
				DisposeTrackObject(TrackTemp);
			}
		DisposeArray(TrackList->TrackArray);
		DisposeStringList(TrackList->List);
		KillMenuAndDeleteItems(TrackList->TrackMenu);
		ReleasePtr((char*)TrackList);
	}


/* change the location of the track list in the window */
void								SetTrackListLocation(TrackListRec* TrackList,
											OrdType XLoc, OrdType YLoc, OrdType Width, OrdType Height)
	{
		CheckPtrExistence(TrackList);
		SetStringListLoc(TrackList->List,XLoc,YLoc,Width,Height);
	}


/* redraw the list */
void								TrackListRedraw(TrackListRec* TrackList)
	{
		CheckPtrExistence(TrackList);
		RedrawStringList(TrackList->List);
	}


/* see if the specified coordinates falls inside the track list rectangle */
MyBoolean						TrackListHitTest(TrackListRec* TrackList,
											OrdType XLoc, OrdType YLoc)
	{
		CheckPtrExistence(TrackList);
		return StringListHitTest(TrackList->List,XLoc,YLoc);
	}


/* handle a mouse down event for the track list */
void								TrackListDoMouseDown(TrackListRec* TrackList,
											OrdType XLoc, OrdType YLoc, ModifierFlags Modifiers)
	{
		CheckPtrExistence(TrackList);
		if (StringListMouseDown(TrackList->List,XLoc,YLoc,Modifiers))
			{
				/* if it returns true, then it was a double click */
				TrackListOpenSelection(TrackList);
			}
	}


/* called when the window becomes active */
void								TrackListBecomeActive(TrackListRec* TrackList)
	{
		CheckPtrExistence(TrackList);
		EnableStringList(TrackList->List);
	}


/* called when the window becomes inactive */
void								TrackListBecomeInactive(TrackListRec* TrackList)
	{
		CheckPtrExistence(TrackList);
		DisableStringList(TrackList->List);
	}


/* called when a selection is made in another list, so that this list */
/* is deselected */
void								TrackListDeselect(TrackListRec* TrackList)
	{
		CheckPtrExistence(TrackList);
		DeselectAllStringListElements(TrackList->List);
	}


/* check to see if there is a selection in this list */
MyBoolean						TrackListIsThereSelection(TrackListRec* TrackList)
	{
		CheckPtrExistence(TrackList);
		return (GetStringListHowManySelectedItems(TrackList->List) > 0);
	}


/* check to see if any of the tracks contained in this list need to be saved */
MyBoolean						DoesTrackListNeedToBeSaved(TrackListRec* TrackList)
	{
		long							Scan;
		long							Limit;
		MyBoolean					Flag;

		CheckPtrExistence(TrackList);
		Flag = TrackList->TrackListChanged;
		Limit = ArrayGetLength(TrackList->TrackArray);
		for (Scan = 0; (Scan < Limit) && !Flag; Scan += 1)
			{
				TrackObjectRec*		TrackTemp;

				TrackTemp = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				if (HasTrackObjectBeenModified(TrackTemp))
					{
						Flag = True;
					}
			}
		return Flag;
	}


/* open an edit window for the selected track */
void								TrackListOpenSelection(TrackListRec* TrackList)
	{
		ArrayRec*					ListOfSelections;

		CheckPtrExistence(TrackList);
		ListOfSelections = GetListOfSelectedItems(TrackList->List);
		if (ListOfSelections != NIL)
			{
				long							Scan;
				long							Limit;

				Limit = ArrayGetLength(ListOfSelections);
				for (Scan = 0; Scan < Limit; Scan += 1)
					{
						TrackObjectRec*		TrackTemp;

						TrackTemp = (TrackObjectRec*)ArrayGetElement(ListOfSelections,Scan);
						TrackObjectOpenWindow(TrackTemp);
					}
				DisposeArray(ListOfSelections);
			}
	}


/* create a new track and open a window for it */
void								TrackListNewTrack(TrackListRec* TrackList)
	{
		TrackObjectRec*		Track;

		CheckPtrExistence(TrackList);
		/* create the object */
		Track = NewTrackObject(TrackList->CodeCenter,TrackList->MainWindow,TrackList);
		if (Track == NIL)
			{
			 FailurePoint1:
				AlertHalt("There is not enough memory available to create a new track.",NIL);
				return;
			}
		/* add it to the string list */
		if (!InsertStringListElement(TrackList->List,NIL,NIL,Track,True))
			{
			 FailurePoint2:
				DisposeTrackObject(Track);
				goto FailurePoint1;
			}
		MainWindowDeselectAllOtherStringLists(TrackList->MainWindow,TrackList);
		SelectStringListElement(TrackList->List,Track);
		MakeStringListSelectionVisible(TrackList->List);
		/* add it to the array */
		if (!ArrayAppendElement(TrackList->TrackArray,Track))
			{
			 FailurePoint3:
				RemoveStringListElement(TrackList->List,Track,True);
				goto FailurePoint2;
			}
		/* update our internal flags */
		TrackList->TrackListChanged = True;
		/* change the name in the list */
		TrackListTrackNameChanged(TrackList,Track);
		/* show the window */
		TrackObjectOpenWindow(Track);
	}


/* delete the selected track */
void								TrackListDeleteSelection(TrackListRec* TrackList)
	{
		ArrayRec*					ListOfSelections;

		CheckPtrExistence(TrackList);
		ListOfSelections = GetListOfSelectedItems(TrackList->List);
		if (ListOfSelections != NIL)
			{
				long								Scan;
				long								Limit;

				Limit = ArrayGetLength(ListOfSelections);
				for (Scan = 0; Scan < Limit; Scan += 1)
					{
						TrackObjectRec*			OneToZap;

						OneToZap = (TrackObjectRec*)ArrayGetElement(ListOfSelections,Scan);
						TrackListDeleteTrack(TrackList,OneToZap);
					}
				DisposeArray(ListOfSelections);
			}
	}


/* delete the explicitly specified track */
void								TrackListDeleteTrack(TrackListRec* TrackList,
											struct TrackObjectRec* TheTrack)
	{
		long								Scan;
		long								Limit;

		CheckPtrExistence(TrackList);
		Limit = ArrayGetLength(TrackList->TrackArray);
		for (Scan = 0; Scan < Limit; Scan += 1)
			{
				TrackObjectRec*			TrackTemp;

				TrackTemp = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				if (TheTrack == TrackTemp)
					{
						FileSpec*					BackupFileWhere;
						FileType*					BackupFile;
						MyBoolean					Success = False;

						BackupFileWhere = NewTempFileSpec(CODE4BYTES('?','?','?','?'),
							CODE4BYTES('?','?','?','?'));
						if (BackupFileWhere != NIL)
							{
								if (OpenFile(BackupFileWhere,&BackupFile,eReadAndWrite))
									{
										BufferedOutputRec*	Output;

										Output = NewBufferedOutput(BackupFile);
										if (Output != NIL)
											{
												if (WriteBufferedOutput(Output,sizeof(MAGICSCRAPSTRING),
													MAGICSCRAPSTRING))
													{
														if (TrackObjectWriteDataOut(TheTrack,Output)
															== eFileLoadNoError)
															{
																Success = True;
															}
													}
												if (!EndBufferedOutput(Output))
													{
														Success = False;
													}
											}
										 else
											{
												CloseFile(BackupFile);
											}
									}
								 else
									{
										DeleteFile(BackupFileWhere);
										DisposeFileSpec(BackupFileWhere);
									}
							}
						if (Success)
							{
								MainWindowNewDeleteUndoInfo(TrackList->MainWindow,BackupFileWhere,
									BackupFile);
								DisposeTrackObject(TrackTemp);
								RemoveStringListElement(TrackList->List,TrackTemp,True);
								ArrayDeleteElement(TrackList->TrackArray,Scan);
								TrackList->TrackListChanged = True;
							}
						 else
							{
								YesNoCancelType		Decision;

								Decision = AskYesNoCancel("Unable to save undo information for object.  "
									"Delete object anyway?",NIL,"Delete","Cancel",NIL/*nothirdbutton*/);
								if (Decision == eYes)
									{
										DisposeTrackObject(TrackTemp);
										RemoveStringListElement(TrackList->List,TrackTemp,True);
										ArrayDeleteElement(TrackList->TrackArray,Scan);
										TrackList->TrackListChanged = True;
									}
							}
						return;
					}
			}
		EXECUTE(PRERR(AllowResume,"TrackListDeleteTrack:  couldn't find object"));
	}


/* the name of an track has changed, so the name in the scrolling */
/* list must also be changed */
void								TrackListTrackNameChanged(TrackListRec* TrackList,
											struct TrackObjectRec* TheTrack)
	{
		char*							TrackName;

		CheckPtrExistence(TrackList);
		CheckPtrExistence(TheTrack);
		ERROR(ArrayFindElement(TrackList->TrackArray,TheTrack) < 0,
			PRERR(ForceAbort,"TrackListTrackNameChanged:  unknown track"));
		TrackName = TrackObjectGetNameCopy(TheTrack);
		if (TrackName != NIL)
			{
				char*							TrackNameNullTerminated;

				TrackNameNullTerminated = BlockToStringCopy(TrackName);
				if (TrackNameNullTerminated != NIL)
					{
						ChangeStringListElementName(TrackList->List,
							TrackNameNullTerminated,TheTrack);
						ReleasePtr(TrackNameNullTerminated);
					}
				ReleasePtr(TrackName);
			}
	}


/* look for a specified track.  returns NIL if not found.  the name is */
/* NOT null terminated */
struct TrackObjectRec*	TrackListLookupNamedTrack(TrackListRec* TrackList, char* Name)
	{
		long							Scan;
		long							Limit;

		CheckPtrExistence(TrackList);
		CheckPtrExistence(Name);
		Limit = ArrayGetLength(TrackList->TrackArray);
		for (Scan = 0; Scan < Limit; Scan += 1)
			{
				TrackObjectRec*			Track;
				char*								NameCopy;

				Track = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				NameCopy = TrackObjectGetNameCopy(Track);
				if (NameCopy != NIL)
					{
						if (PtrSize(Name) == PtrSize(NameCopy))
							{
								if (MemEqu(Name,NameCopy,PtrSize(Name)))
									{
										ReleasePtr(NameCopy);
										return Track;
									}
							}
						ReleasePtr(NameCopy);
					}
			}
		return NIL;
	}


/* cancel dependencies where objects have the specified object listed in the */
/* background.  this is called by the specified object when it is dying */
void								TrackListDelinkBackgroundInstances(TrackListRec* TrackList,
											struct TrackObjectRec* TheTrack)
	{
		long							Scan;
		long							Limit;

		CheckPtrExistence(TrackList);
		CheckPtrExistence(TheTrack);
		Limit = ArrayGetLength(TrackList->TrackArray);
		for (Scan = 0; Scan < Limit; Scan += 1)
			{
				TrackObjectRec*			Track;

				Track = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				if (Track != TheTrack)
					{
						TrackObjectRemoveBackgroundObj(Track/*listowner*/,TheTrack/*onetoremove*/);
					}
			}
	}


/* get the track menu */
MenuType*						TrackListGetTrackMenu(TrackListRec* TrackList)
	{
		CheckPtrExistence(TrackList);
		return TrackList->TrackMenu;
	}


/* enable all of the menu items on the menu associated with this track list */
void								TrackListEnableMenuItems(TrackListRec* TrackList)
	{
		long							Scan;
		long							Limit;

		CheckPtrExistence(TrackList);
		Limit = ArrayGetLength(TrackList->TrackArray);
		for (Scan = 0; Scan < Limit; Scan += 1)
			{
				EnableMenuItem(TrackObjectGetMenuItem((TrackObjectRec*)ArrayGetElement(
					TrackList->TrackArray,Scan)));
			}
	}


/* return the track object associated with the specified menu item or NIL if */
/* there is no such track object */
struct TrackObjectRec*	TrackListLookupMenuItem(TrackListRec* TrackList,
											struct MenuItemType* MenuItem)
	{
		long							Scan;
		long							Limit;

		CheckPtrExistence(TrackList);
		Limit = ArrayGetLength(TrackList->TrackArray);
		for (Scan = 0; Scan < Limit; Scan += 1)
			{
				TrackObjectRec*		TrackObj;

				TrackObj = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				if (TrackObjectGetMenuItem(TrackObj) == MenuItem)
					{
						return TrackObj;
					}
			}
		return NIL;
	}


/* put a checkmark on all track menu items that occur in this list */
void								TrackListMenuItemCheckmarks(TrackListRec* TrackList,
											ArrayRec* TrackObjList)
	{
		long							Limit;
		long							Scan;
		long							OtherLimit;

		CheckPtrExistence(TrackList);
		CheckPtrExistence(TrackObjList);
		Limit = ArrayGetLength(TrackList->TrackArray);
		OtherLimit = ArrayGetLength(TrackObjList);
		for (Scan = 0; Scan < Limit; Scan += 1)
			{
				long							OtherScan;
				TrackObjectRec*		PossibleTrack;

				PossibleTrack = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				for (OtherScan = 0; OtherScan < OtherLimit; OtherScan += 1)
					{
						TrackObjectRec*		Checkable;

						Checkable = (TrackObjectRec*)ArrayGetElement(TrackObjList,OtherScan);
						if (Checkable == PossibleTrack)
							{
								SetItemCheckmark(TrackObjectGetMenuItem(Checkable));
								goto FoundItPoint;
							}
					}
				/* jump here when it is found */
			 FoundItPoint:
				;
			}
	}


/* the document's name changed, so we need to update the windows */
void								TrackListGlobalNameChange(TrackListRec* TrackList, char* NewFilename)
	{
		long							Scan;
		long							Limit;

		CheckPtrExistence(TrackList);
		Limit = ArrayGetLength(TrackList->TrackArray);
		for (Scan = 0; Scan < Limit; Scan += 1)
			{
				TrackObjectRec*		TrackObj;

				TrackObj = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				TrackObjectGlobalNameChange(TrackObj,NewFilename);
			}
	}


/* get an array of all of the tracks.  it must be disposed of by the caller */
struct ArrayRec*		TrackListGetListOfAllTracks(TrackListRec* TrackList)
	{
		CheckPtrExistence(TrackList);
		return DuplicateArray(TrackList->TrackArray);
	}


/*   4-byte little endian number of tracks (positive 2s complement) */
/*   n-bytes data for the track objects */
/*   n-bytes data for background display information (a chunk for each track) */


/* read track data from a file.  returns True if completely successful. */
FileLoadingErrors		TrackListReadData(TrackListRec* TrackList,
											struct BufferedInputRec* Input)
	{
		signed long				NumberOfTracks;
		long							Scan;

		CheckPtrExistence(TrackList);
		CheckPtrExistence(Input);

		/*   4-byte little endian number of tracks (positive 2s complement) */
		if (!ReadBufferedSignedLongLittleEndian(Input,&NumberOfTracks))
			{
				return eFileLoadDiskError;
			}
		if (NumberOfTracks < 0)
			{
				return eFileLoadBadFormat;
			}

		/*   n-bytes data for objects */
		for (Scan = 0; Scan < NumberOfTracks; Scan += 1)
			{
				TrackObjectRec*		Track EXECUTE(= (TrackObjectRec*)0x81818181);
				FileLoadingErrors	Error;

				/* load the track */
				Error = TrackObjectNewFromFile(&Track,Input,TrackList->CodeCenter,
					TrackList->MainWindow,TrackList);
				if (Error != eFileLoadNoError)
					{
					 FailurePoint1:
						return Error;
					}
				CheckPtrExistence(Track);
				/* add it to the string list */
				if (!InsertStringListElement(TrackList->List,NIL,NIL,Track,True))
					{
					 FailurePoint2:
						DisposeTrackObject(Track);
						Error = eFileLoadOutOfMemory;
						goto FailurePoint1;
					}
				/* add it to the array */
				if (!ArrayAppendElement(TrackList->TrackArray,Track))
					{
					 FailurePoint3:
						RemoveStringListElement(TrackList->List,Track,True);
						goto FailurePoint2;
					}
				/* change the name in the list */
				TrackListTrackNameChanged(TrackList,Track);
			}

		for (Scan = 0; Scan < NumberOfTracks; Scan += 1)
			{
				TrackObjectRec*		Track;
				FileLoadingErrors	Error;

				Track = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				CheckPtrExistence(Track);
				Error = LoadBackgroundTrackInfo(Track,Input,TrackList->TrackArray);
				if (Error != eFileLoadNoError)
					{
						return Error;
					}
			}

		return eFileLoadNoError;
	}


/* write track data to a file.  returns True if completely successful. */
FileLoadingErrors		TrackListWriteData(TrackListRec* TrackList,
											struct BufferedOutputRec* Output)
	{
		long							NumberOfTracks;
		long							Scan;

		CheckPtrExistence(TrackList);
		CheckPtrExistence(Output);

		/*   4-byte little endian number of tracks (positive 2s complement) */
		NumberOfTracks = ArrayGetLength(TrackList->TrackArray);
		if (!WriteBufferedSignedLongLittleEndian(Output,NumberOfTracks))
			{
				return eFileLoadDiskError;
			}

		/*   n-bytes data for objects */
		for (Scan = 0; Scan < NumberOfTracks; Scan += 1)
			{
				TrackObjectRec*		TrackObj;
				FileLoadingErrors	Error;

				/* get the track */
				TrackObj = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				/* write the track out to disk */
				Error = TrackObjectWriteDataOut(TrackObj,Output);
				/* handle errors */
				if (Error != eFileLoadNoError)
					{
						return Error;
					}
			}

		for (Scan = 0; Scan < NumberOfTracks; Scan += 1)
			{
				TrackObjectRec*		Track;
				FileLoadingErrors	Error;

				Track = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				CheckPtrExistence(Track);
				Error = SaveBackgroundTrackInfo(Track,Output,TrackList->TrackArray);
				if (Error != eFileLoadNoError)
					{
						return Error;
					}
			}

		return eFileLoadNoError;
	}


/* after a file has been saved, this is called to mark all objects as not modified. */
void								TrackListMarkAllObjectsSaved(TrackListRec* TrackList)
	{
		long							Scan;
		long							Limit;

		CheckPtrExistence(TrackList);
		Limit = ArrayGetLength(TrackList->TrackArray);
		for (Scan = 0; Scan < Limit; Scan += 1)
			{
				TrackObjectRec*		TrackObj;

				TrackObj = (TrackObjectRec*)ArrayGetElement(TrackList->TrackArray,Scan);
				TrackObjectMarkAsSaved(TrackObj);
			}
		TrackList->TrackListChanged = False;
	}


/* copy the selected object in the list to the clipboard.  return False if failed. */
MyBoolean						TrackListCopyObject(TrackListRec* TrackList)
	{
		ArrayRec*							ListOfSelections;
		MyBoolean							TotalSuccessFlag = False;

		CheckPtrExistence(TrackList);
		ListOfSelections = GetListOfSelectedItems(TrackList->List);
		if (ListOfSelections != NIL)
			{
				if (ArrayGetLength(ListOfSelections) >= 1)
					{
						TrackObjectRec*			TrackTemp;
						FileSpec*						TempFileLocation;

						TrackTemp = (TrackObjectRec*)ArrayGetElement(ListOfSelections,0);
						/* open the temporary file */
						TempFileLocation = NewTempFileSpec(CODE4BYTES('\?','\?','\?','\?'),
							CODE4BYTES('\?','\?','\?','\?'));
						if (TempFileLocation != NIL)
							{
								FileType*							FileDescriptor;

								if (OpenFile(TempFileLocation,&FileDescriptor,eReadAndWrite))
									{
										BufferedOutputRec*		BufferedFile;

										BufferedFile = NewBufferedOutput(FileDescriptor);
										if (BufferedFile != NIL)
											{
												MyBoolean							WriteSucceeded = False;

												if (WriteBufferedOutput(BufferedFile,sizeof(MAGICSCRAPSTRING),
													MAGICSCRAPSTRING))
													{
														if (TrackObjectWriteDataOut(TrackTemp,BufferedFile)
															== eFileLoadNoError)
															{
																WriteSucceeded = True;
															}
													}
												if (EndBufferedOutput(BufferedFile) && WriteSucceeded)
													{
														char*							Buffer;
														long							NumberOfBytes;

														NumberOfBytes = GetFileLength(FileDescriptor);
														Buffer = AllocPtrCanFail(NumberOfBytes,
															"TrackListCopyObject:  scrap buffer");
														if (Buffer != NIL)
															{
																if (SetFilePosition(FileDescriptor,0))
																	{
																		if (0 == ReadFromFile(FileDescriptor,
																			Buffer,NumberOfBytes))
																			{
																				if (SetScrapToThis(Buffer))
																					{
																						TotalSuccessFlag = True;
																					}
																			}
																	}
																ReleasePtr(Buffer);
															}
													}
											}
										CloseFile(FileDescriptor);
									}
								DeleteFile(TempFileLocation);
								DisposeFileSpec(TempFileLocation);
							}
					}
				DisposeArray(ListOfSelections);
			}
		return TotalSuccessFlag;
	}


/* try to paste the clipboard in as a track.  returns False if it failed or the */
/* clipboard did not contain a track. */
MyBoolean						TrackListPasteObject(TrackListRec* TrackList)
	{
		MyBoolean					TotalSuccessFlag = False;
		char*							Scrap;

		CheckPtrExistence(TrackList);
		Scrap = GetCopyOfScrap();
		if (Scrap != NIL)
			{
				FileSpec*					TempFileLocation;

				TempFileLocation = NewTempFileSpec(CODE4BYTES('\?','\?','\?','\?'),
					CODE4BYTES('\?','\?','\?','\?'));
				if (TempFileLocation != NIL)
					{
						FileType*							FileDescriptor;

						if (OpenFile(TempFileLocation,&FileDescriptor,eReadAndWrite))
							{
								BufferedOutputRec*		BufferedFile;

								BufferedFile = NewBufferedOutput(FileDescriptor);
								if (BufferedFile != NIL)
									{
										MyBoolean							WriteSucceeded = False;

										if (WriteBufferedOutput(BufferedFile,PtrSize(Scrap),Scrap))
											{
												WriteSucceeded = True;
											}
										if (EndBufferedOutput(BufferedFile) && WriteSucceeded)
											{
												TotalSuccessFlag = TrackListPasteFromFile(TrackList,
													FileDescriptor);
											}
									}
								CloseFile(FileDescriptor);
							}
						DeleteFile(TempFileLocation);
						DisposeFileSpec(TempFileLocation);
					}
				ReleasePtr(Scrap);
			}
		return TotalSuccessFlag;
	}


/* try to paste the track object in from the file */
MyBoolean						TrackListPasteFromFile(TrackListRec* TrackList,
											struct FileType* File)
	{
		MyBoolean					TotalSuccessFlag = False;

		CheckPtrExistence(TrackList);
		if (SetFilePosition(File,0))
			{
				BufferedInputRec*	InputFile;

				InputFile = NewBufferedInput(File);
				if (InputFile != NIL)
					{
						char							HeaderTest[sizeof(MAGICSCRAPSTRING)];

						if (ReadBufferedInput(InputFile,sizeof(MAGICSCRAPSTRING),HeaderTest))
							{
								if (MemEqu(MAGICSCRAPSTRING,HeaderTest,sizeof(MAGICSCRAPSTRING)))
									{
										TrackObjectRec*				TrackTemp EXECUTE(= (TrackObjectRec*)0x81818181);

										if (eFileLoadNoError == TrackObjectNewFromFile(&TrackTemp,InputFile,
											TrackList->CodeCenter,TrackList->MainWindow,TrackList))
											{
												CheckPtrExistence(TrackTemp);
												/* add it to the scrolling object list */
												if (!InsertStringListElement(TrackList->List,NIL,NIL,TrackTemp,True))
													{
													 FailurePoint:
														DisposeTrackObject(TrackTemp);
													}
												 else
													{
														MainWindowDeselectAllOtherStringLists(TrackList->MainWindow,TrackList);
														SelectStringListElement(TrackList->List,TrackTemp);
														MakeStringListSelectionVisible(TrackList->List);
														/* add it to the array */
														if (!ArrayAppendElement(TrackList->TrackArray,TrackTemp))
															{
																RemoveStringListElement(TrackList->List,TrackTemp,True);
																goto FailurePoint;
															}
														 else
															{
																/* change the name in the list */
																TrackListTrackNameChanged(TrackList,TrackTemp);
																TotalSuccessFlag = True;
																TrackList->TrackListChanged = True;
															}
													}
											}
									}
							}
					}
				EndBufferedInput(InputFile);
			}
		return TotalSuccessFlag;
	}
