// SVDrag.c

//

// Original version by Jon Lansdell and Nigel Humphreys.

// 4.0 and 3.1 updates by Greg Sutton.

// Drag Manager support by Chris White

// ©Apple Computer Inc 1996, all rights reserved.

#pragma once

#include <Types.h>

#include <Drag.h>

#include "MSGlobals.h"

pascal OSErr MyTrackingHandler ( DragTrackingMessage theMessage, WindowPtr theWindow,

                                    void* handlerRefCon, DragReference theDrag );

pascal OSErr MyReceiveHandler  ( WindowPtr theWindow, void* handlerRefCon, 

                                DragReference theDrag );

OSErr InitDragHandlers ( void );

OSErr InstallDragHandlers ( WindowPtr theWindow );

void RemoveDragHandlers ( WindowPtr theWindow );

Boolean IsDragInWindowContent ( DragReference theDrag, WindowRef theWindow );

Boolean PtInWindow ( Point localPt, WindowRef theWindow );

Boolean PtInDocument ( Point localPt, DPtr theDocument );

Boolean IsMouseInContentRgn ( DragReference theDrag, WindowPtr theWindow );

Boolean CanAcceptDragItems ( DragReference theDrag, WindowPtr theWindow );

OSErr GetSelectedText ( DPtr theDocument, Ptr dataPtr, short* dataSize );

void GetSelectedTextRgn ( DPtr theDocument, RgnHandle dataRgn );

Boolean IsMoving ( DragReference theDrag );

void OutlineRegion ( RgnHandle theRgn );

OSErr DoWindowContentDrag ( WindowPtr theWindow, EventRecord* theEvent );

static Boolean DragIsNotInSourceWindow ( DragReference theDrag );

Boolean UserWantsToDrag ( WindowRef theWindow, Point globalPt );

Boolean PointInWindowSelection ( Point localPt, WindowRef theWindow );

static Boolean IsDragMoving ( DragReference theDrag );

static Boolean IsDragWithOptionKey ( DragReference theDrag );

void LocalRgnToGlobalRgn ( RgnHandle theRgn, WindowRef theWindow );

void LocalRectToGlobalRect ( Rect* theRect, WindowRef theWindow );

short HitTest(Point theLoc, DPtr* theDoc);

void DrawCaret(short offset, TEHandle theTE);

char GetCharAtOffset(short offset, TEHandle theTE);

Boolean WhiteSpace(char theChar);

Boolean WhiteSpaceAtOffset(short offset, TEHandle theTE);

void InsertTextAtOffset(short offset, char *theBuf, long size, StScrpHandle theStyl, TEHandle theTE);

Boolean IsOffsetInSelection ( short theOffset, TEHandle theTE );

short TEIsFrontOfLine ( short offset, TEHandle theTE );

short TEGetLine ( short offset, TEHandle theTE );

void DeleteTextSelection ( TEHandle theTE, short* theInsertPosition );

Boolean DropLocationIsFinderTrash ( AEDesc* dropLocation );