diff options
Diffstat (limited to 'tikzit-old/src/osx/NilToEmptyStringTransformer.m')
-rw-r--r-- | tikzit-old/src/osx/NilToEmptyStringTransformer.m | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/tikzit-old/src/osx/NilToEmptyStringTransformer.m b/tikzit-old/src/osx/NilToEmptyStringTransformer.m new file mode 100644 index 0000000..413f404 --- /dev/null +++ b/tikzit-old/src/osx/NilToEmptyStringTransformer.m @@ -0,0 +1,53 @@ +// +// NilToEmptyStringTransformer.m +// TikZiT +// +// Copyright 2011 Aleks Kissinger. All rights reserved. +// +// +// This file is part of TikZiT. +// +// TikZiT 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 3 of the License, or +// (at your option) any later version. +// +// TikZiT 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 TikZiT. If not, see <http://www.gnu.org/licenses/>. +// + +#import "NilToEmptyStringTransformer.h" + +@implementation NilToEmptyStringTransformer + +- (id)init { + if (!(self = [super init])) return nil; + return self; +} + ++ (Class)transformedValueClass { + return [NSString class]; +} + ++ (BOOL)allowsReverseTransformation { + return YES; +} + +- (id)transformedValue:(id)value { + if (value == nil) { + return @""; + } else { + return value; + } +} + +- (id)reverseTransformedValue:(id)value { + return [self transformedValue:value]; +} + +@end |