Added Helper Categories

Added Documentation

MathPad/NSIndexPath+MPRemoveFirstIndex.h

@@ -0,0 +1,21 @@
+//
+//  NSIndexPath+MPRemoveFirstIndex.h
+//  MathPad
+//
+//  Created by Kim Wittenburg on 23.04.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSIndexPath (MPRemoveFirstIndex)
+
+/*!
+ @method indexPathByRemovingFirstIndex
+ @brief Provides an index path with the indexes in the receiving index path, excluding the first one.
+ @discussion Returns an empty NSIndexPath instance if the receiving index path’s length is 1 or less.
+ @return New index path with the receiving index path’s indexes, excluding the first one.
+ */
+- (NSIndexPath *)indexPathByRemovingFirstIndex;
+
+@end

MathPad/NSIndexPath+MPRemoveFirstIndex.m

@@ -0,0 +1,27 @@
+//
+//  NSIndexPath+MPRemoveFirstIndex.m
+//  MathPad
+//
+//  Created by Kim Wittenburg on 23.04.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+#import "NSIndexPath+MPRemoveFirstIndex.h"
+
+@implementation NSIndexPath (MPRemoveFirstIndex)
+
+- (NSIndexPath *)indexPathByRemovingFirstIndex
+{
+    if (self.length <= 1) {
+        return [[NSIndexPath alloc] init];
+    }
+    NSUInteger indexes[self.length];
+    [self getIndexes:indexes];
+    NSUInteger newIndexes[self.length-1];
+    for (NSUInteger i = 0; i < self.length-1; i++) {
+        newIndexes[i] = indexes[i+1];
+    }
+    return [[NSIndexPath alloc] initWithIndexes:newIndexes length:self.length-1];
+}
+
+@end

MathPad/NSObject+MPStringTest.h

@@ -10,6 +10,12 @@
 
 @interface NSObject (MPStringTest)
 
+/*!
+ @method isString
+ @brief Returns wether the receiver is a string object.
+ @discussion A string object is an instance of the @c NSString class or any of its subclasses (for example @c NSMutableString). For an @c NSAttributedString this method returns @c NO.
+ @return @c YES if the receiver is an instance of @c NSString or a subclass, @c NO otherwise.
+ */
 - (BOOL)isString;
 
 @end

MathPad/NSTextStorage+MPSetContents.h

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+//
+//  NSTextStorage+MPSetContents.h
+//  MathPad
+//
+//  Created by Kim Wittenburg on 21.04.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+@interface NSTextStorage (MPSetContents)
+
+/*!
+ @method setString:
+ @brief Replaces the contents of the receiver with @c aString.
+ @discussion This method sends the receiver a @c replaceCharactersInRange:withString: with a range including all characters of the receiver and @c aString. See @c replaceCharactersInRange:withString: for details.
+ @param aString A string specifying the characters to replace the receiver's current contents.
+ */
+- (void)setString:(NSString *)aString;
+
+@end

MathPad/NSTextStorage+MPSetContents.m

@@ -0,0 +1,19 @@
+//
+//  NSTextStorage+MPSetContents.m
+//  MathPad
+//
+//  Created by Kim Wittenburg on 21.04.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+#import "NSTextStorage+MPSetContents.h"
+
+@implementation NSTextStorage (MPSetContents)
+
+- (void)setString:(NSString *)string
+{
+    NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:string];
+    [self setAttributedString:attributedString];
+}
+
+@end