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History.m
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History.m
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//
// History.m
// Crossbow
//
// Copyright (C) 2009 Roland Rabien
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#import "History.h"
#import "DirEntry.h"
@implementation History
- (id)init
{
if (self = [super init])
{
history = [[NSMutableArray alloc] initWithCapacity: 10];
pos = -1;
max = 30;
}
return self;
}
- (DirEntry*)current
{
return [history objectAtIndex: pos];
}
- (void)add:(DirEntry*)folder
{
if (folder)
{
while (pos < [history count] - 1)
[history removeLastObject];
[history addObject:folder];
pos++;
}
}
- (BOOL)canGoBack
{
return pos > 0;
}
- (void)goBack
{
pos--;
}
- (BOOL)canGoForward
{
return pos < [history count] - 1;
}
- (void)goForward
{
pos++;
}
- (BOOL)canGoUp
{
DirEntry* de = [self current];
return ![de isFilesystemRoot];
}
- (void)goUp
{
[self add: [[self current] getParent]];
}
- (NSArray*)getHistory
{
return history;
}
- (void)goToPast:(int)index
{
pos = index;
}
@end