/*

File: NSOutlineView_Extensions.m

Abstract: Our custom extensions to NSOutlineView to handle row selection

Version: <1.0>

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*/ 

#import "NSOutlineView_Extensions.h"

@implementation NSOutlineView (MyExtensions)

// returns the first selected item

- (id)selectedItem { return [self itemAtRow: [self selectedRow]]; }

// gives all selected items

- (NSArray*)allSelectedItems {

    NSMutableArray *items = [NSMutableArray array];

    NSEnumerator *selectedRows = [self selectedRowEnumerator];

    NSNumber *selRow = nil;

    while( (selRow = [selectedRows nextObject]) ) {

        if ([self itemAtRow:[selRow intValue]]) 

            [items addObject: [self itemAtRow:[selRow intValue]]];

    }

    return items;

}

// select all items in the specified array

- (void)selectItems:(NSArray*)items byExtendingSelection:(BOOL)extend {

    unsigned int i;

    if (extend==NO) [self deselectAll:nil];

    for (i=0;i<[items count];i++) {

        int row = [self rowForItem:[items objectAtIndex:i]];

        if(row>=0) [self selectRow: row byExtendingSelection:YES];

    }

}

// given a row value, get the next row, and

// wrap around to the beginning of the list

// if specified

- (int) nextRow:(int)curRow wrapOK:(BOOL)wrapFlag

{

    int numRows = [self numberOfRows];

    int nextRow;

    // check if current row is out of range

    if ((curRow < -1) || (curRow >= numRows))

    {

        return NSNotFound;

    }

    nextRow = curRow + 1;

    if (nextRow >= numRows)

    {

        if (YES == wrapFlag)

        {

            return (0);

        }

        else

        {

            return NSNotFound;

        }

    }

    return (nextRow);

}

// given a row value, get the next selected row, and

// wrap around to the beginning of the list if specified

- (int) nextSelectedRow:(int)curSelectedRow wrapOK:(BOOL)wrapFlag

{

    int nextSelRow;

    NSIndexSet *selRowIndexes = nil;

    selRowIndexes = [self selectedRowIndexes];

    if (nil == selRowIndexes) return NSNotFound;

    // if current selected row is bogus, return

    // the first selected row in the list

    if ((curSelectedRow < 0) || (curSelectedRow > [selRowIndexes lastIndex]))

    {

        return ([selRowIndexes firstIndex]);

    }

    nextSelRow = [selRowIndexes indexGreaterThanIndex: curSelectedRow];

    if (nextSelRow == NSNotFound)

    {

        if (YES == wrapFlag)

            return ([selRowIndexes firstIndex]);

        else

            return NSNotFound;

    }

    return(nextSelRow);

}

// get the last selected row

- (int) lastSelectedRow

{

    NSIndexSet *selRowIndexes = [self selectedRowIndexes];

    if (nil == selRowIndexes) return NSNotFound;

    return([selRowIndexes lastIndex]);

}

// get the first selected row

- (int) firstSelectedRow

{

    NSIndexSet *selRowIndexes = [self selectedRowIndexes];

    if (nil == selRowIndexes) return NSNotFound;

    return([selRowIndexes firstIndex]);

}

@end

@implementation NSOutlineView (MyActiveRowExtensions)

@end

@implementation MyOutlineView 

- (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal {

    if (isLocal) return NSDragOperationEvery;

    else return NSDragOperationCopy;

}

- (BOOL)acceptsFirstMouse:(NSEvent *)event

{

    return YES;

}

@end