#import "AQGridViewUpdateItem.h"

@implementation AQGridViewUpdateItem

@synthesize originalIndex=_index, newIndex=_newIndex, action=_action, animation=_animation, offset=_offset;

- (id) initWithIndex: (NSUInteger) index action: (AQGridViewUpdateAction) action animation: (AQGridViewItemAnimation) animation

{

self = [super init];

if ( self == nil )

return ( nil );

_index = index;

_action = action;

_animation = animation;

return ( self );

}

- (void) setNewIndex: (NSUInteger) value

{

NSAssert(self.action == AQGridViewUpdateActionMove, @"newIndex set on a non-move update item");

_newIndex = value;

}

- (NSString *) description

{

NSString * actionDesc = @"<Unknown>";

switch ( _action )

{

case AQGridViewUpdateActionInsert:

actionDesc = @"Insert";

break;

case AQGridViewUpdateActionDelete:

actionDesc = @"Delete";

break;

case AQGridViewUpdateActionMove:

actionDesc = @"Move";

break;

case AQGridViewUpdateActionReload:

actionDesc = @"Reload";

break;

default:

break;

}

NSString * animationDesc = @"<Unknown>";

switch ( (UITableViewRowAnimation)_animation )

{

case UITableViewRowAnimationFade:

animationDesc = @"Fade";

break;

case UITableViewRowAnimationRight:

animationDesc = @"Right";

break;

case UITableViewRowAnimationLeft:

animationDesc = @"Left";

break;

case UITableViewRowAnimationTop:

animationDesc = @"Top";

break;

case UITableViewRowAnimationBottom:

animationDesc = @"Bottom";

break;

case UITableViewRowAnimationNone:

animationDesc = @"None";

break;

case UITableViewRowAnimationMiddle:

animationDesc = @"Middle";

break;

default:

break;

}

return ( [NSString stringWithFormat: @"%@{index=%u, action=%@, animation=%@, offset=%.02f}", [super description], (unsigned)_index, actionDesc, animationDesc, (double)_offset] );

}

- (NSComparisonResult) compare: (AQGridViewUpdateItem *) other

{

if ( _index > other->_index )

return ( NSOrderedDescending );

else if ( _index < other->_index )

return ( NSOrderedAscending );

return ( NSOrderedSame );

}

- (NSComparisonResult) inverseCompare: (AQGridViewUpdateItem *) other

{

return ( [other compare: self] );

}

- (NSUInteger) index

{

// handle case where offset is negative and would cause index to wrap

if ( (_offset < 0) && (abs(_offset) > _index) )

return ( 0 );

return ( _index + _offset );

}