82 lines
2.7 KiB
Objective-C
82 lines
2.7 KiB
Objective-C
//
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// RZDataBinding.h
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//
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// Created by Rob Visentin on 4/7/15.
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// Copyright 2014 Raizlabs and other contributors
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// http://raizlabs.com/
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#import <Foundation/Foundation.h>
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#pragma mark - Definitions
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/**
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* A transform that takes a value as a parameter and returns an object.
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*
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* @param value The value that just changed on a foreign object for a bound key path.
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*
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* @return The value to set for the bound key. Ideally the returned value should depend solely on the input value.
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*/
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typedef id (^RZDBKeyBindingTransform)(id value);
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#pragma mark - Convenience Constants
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/**
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* If value is nil, returns @(0), otherwise returns value.
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*/
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OBJC_EXTERN RZDBKeyBindingTransform const kRZDBNilToZeroTransform;
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/**
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* If value is nil, returns @(1), otherwise returns value.
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*/
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OBJC_EXTERN RZDBKeyBindingTransform const kRZDBNilToOneTransform;
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/**
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* If value is nil, returns NSValue with CGSizeZero, otherwise returns value.
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*/
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OBJC_EXTERN RZDBKeyBindingTransform const kRZDBNilToCGSizeZeroTransform;
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/**
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* If value is nil, returns NSValue with CGRectZero, otherwise returns value.
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*/
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OBJC_EXTERN RZDBKeyBindingTransform const kRZDBNilToCGRectZeroTransform;
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/**
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* If value is nil, returns NSValue with CGRectNull, otherwise returns value.
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*/
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OBJC_EXTERN RZDBKeyBindingTransform const kRZDBNilToCGRectNullTransform;
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/**
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* Returns @(![value boolValue])
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*/
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OBJC_EXTERN RZDBKeyBindingTransform const kRZDBLogicalNegateTransform;
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/**
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* Returns @(1.0 - [value doubleValue])
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*/
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OBJC_EXTERN RZDBKeyBindingTransform const kRZDBOneMinusTransform;
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/**
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* Returns @(~[value longLongValue])
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*/
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OBJC_EXTERN RZDBKeyBindingTransform const kRZDBBitwiseComplementTransform;
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