YYText/Demo/YYTextDemo/NSString+YYAdd.h

//
//  NSString+YYAdd.h
//  YYCategories <https://github.com/ibireme/YYCategories>
//
//  Created by ibireme on 13/4/3.
//  Copyright (c) 2015 ibireme.
//
//  This source code is licensed under the MIT-style license found in the
//  LICENSE file in the root directory of this source tree.
//

#import <UIKit/UIKit.h>

/**
 Provide hash, encrypt, encode and some common method for 'NSString'.
 */
@interface NSString (YYAdd)


#pragma mark - Drawing
///=============================================================================
/// @name Drawing
///=============================================================================

/**
 Returns the size of the string if it were rendered with the specified constraints.
 
 @param font          The font to use for computing the string size.
 
 @param size          The maximum acceptable size for the string. This value is
 used to calculate where line breaks and wrapping would occur.
 
 @param lineBreakMode The line break options for computing the size of the string.
 For a list of possible values, see NSLineBreakMode.
 
 @return              The width and height of the resulting string's bounding box.
 These values may be rounded up to the nearest whole number.
 */
- (CGSize)sizeForFont:(UIFont *)font size:(CGSize)size mode:(NSLineBreakMode)lineBreakMode;

/**
 Returns the width of the string if it were to be rendered with the specified
 font on a single line.
 
 @param font  The font to use for computing the string width.
 
 @return      The width of the resulting string's bounding box. These values may be
 rounded up to the nearest whole number.
 */
- (CGFloat)widthForFont:(UIFont *)font;

/**
 Returns the height of the string if it were rendered with the specified constraints.
 
 @param font   The font to use for computing the string size.
 
 @param width  The maximum acceptable width for the string. This value is used
 to calculate where line breaks and wrapping would occur.
 
 @return       The height of the resulting string's bounding box. These values
 may be rounded up to the nearest whole number.
 */
- (CGFloat)heightForFont:(UIFont *)font width:(CGFloat)width;


#pragma mark - Regular Expression
///=============================================================================
/// @name Regular Expression
///=============================================================================

/**
 Whether it can match the regular expression
 
 @param regex  The regular expression
 @param options     The matching options to report.
 @return YES if can match the regex; otherwise, NO.
 */
- (BOOL)matchesRegex:(NSString *)regex options:(NSRegularExpressionOptions)options;

/**
 Match the regular expression, and executes a given block using each object in the matches.
 
 @param regex    The regular expression
 @param options  The matching options to report.
 @param block    The block to apply to elements in the array of matches.
 The block takes four arguments:
     match: The match substring.
     matchRange: The matching options.
     stop: A reference to a Boolean value. The block can set the value
         to YES to stop further processing of the array. The stop
         argument is an out-only argument. You should only ever set
         this Boolean to YES within the Block.
 */
- (void)enumerateRegexMatches:(NSString *)regex
                      options:(NSRegularExpressionOptions)options
                   usingBlock:(void (^)(NSString *match, NSRange matchRange, BOOL *stop))block;

/**
 Returns a new string containing matching regular expressions replaced with the template string.
 
 @param regex       The regular expression
 @param options     The matching options to report.
 @param replacement The substitution template used when replacing matching instances.
 
 @return A string with matching regular expressions replaced by the template string.
 */
- (NSString *)stringByReplacingRegex:(NSString *)regex
                             options:(NSRegularExpressionOptions)options
                          withString:(NSString *)replacement;


#pragma mark - Emoji
///=============================================================================
/// @name Emoji
///=============================================================================

/**
 Whether the receiver contains Apple Emoji (displayed in current version of iOS).
 */
- (BOOL)containsEmoji;

- (BOOL)containsEmojiForSystemVersion:(double)systemVersion;


#pragma mark - Utilities
///=============================================================================
/// @name Utilities
///=============================================================================

/**
 Returns a new UUID NSString
 e.g. "D1178E50-2A4D-4F1F-9BD3-F6AAB00E06B1"
 */
+ (NSString *)stringWithUUID;

/**
 Returns a string containing the characters in a given UTF32Char.
 
 @param char32 A UTF-32 character.
 @return A new string, or nil if the character is invalid.
 */
+ (NSString *)stringWithUTF32Char:(UTF32Char)char32;

/**
 Returns a string containing the characters in a given UTF32Char array.
 
 @param char32 An array of UTF-32 character.
 @param length The character count in array.
 @return A new string, or nil if an error occurs.
 */
+ (NSString *)stringWithUTF32Chars:(const UTF32Char *)char32 length:(NSUInteger)length;

/**
 Enumerates the unicode characters (UTF-32) in the specified range of the string.
 
 @param range The range within the string to enumerate substrings.
 @param block The block executed for the enumeration. The block takes four arguments:
    char32: The unicode character.
    range: The range in receiver. If the range.length is 1, the character is in BMP;
        otherwise (range.length is 2) the character is in none-BMP Plane and stored
        by a surrogate pair in the receiver.
    stop: A reference to a Boolean value that the block can use to stop the enumeration 
        by setting *stop = YES; it should not touch *stop otherwise.
 */
- (void)enumerateUTF32CharInRange:(NSRange)range usingBlock:(void (^)(UTF32Char char32, NSRange range, BOOL *stop))block;

/**
 Trim blank characters (space and newline) in head and tail.
 @return the trimmed string.
 */
- (NSString *)stringByTrim;

/**
 Add scale modifier to the file name (without path extension),
 From @"name" to @"name@2x".
 
 e.g.
 <table>
 <tr><th>Before     </th><th>After(scale:2)</th></tr>
 <tr><td>"icon"     </td><td>"icon@2x"     </td></tr>
 <tr><td>"icon "    </td><td>"icon @2x"    </td></tr>
 <tr><td>"icon.top" </td><td>"icon.top@2x" </td></tr>
 <tr><td>"/p/name"  </td><td>"/p/name@2x"  </td></tr>
 <tr><td>"/path/"   </td><td>"/path/"      </td></tr>
 </table>
 
 @param scale Resource scale.
 @return String by add scale modifier, or just return if it's not end with file name.
 */
- (NSString *)stringByAppendingNameScale:(CGFloat)scale;

/**
 Add scale modifier to the file path (with path extension),
 From @"name.png" to @"name@2x.png".
 
 e.g.
 <table>
 <tr><th>Before     </th><th>After(scale:2)</th></tr>
 <tr><td>"icon.png" </td><td>"icon@2x.png" </td></tr>
 <tr><td>"icon..png"</td><td>"icon.@2x.png"</td></tr>
 <tr><td>"icon"     </td><td>"icon@2x"     </td></tr>
 <tr><td>"icon "    </td><td>"icon @2x"    </td></tr>
 <tr><td>"icon."    </td><td>"icon.@2x"    </td></tr>
 <tr><td>"/p/name"  </td><td>"/p/name@2x"  </td></tr>
 <tr><td>"/path/"   </td><td>"/path/"      </td></tr>
 </table>
 
 @param scale Resource scale.
 @return String by add scale modifier, or just return if it's not end with file name.
 */
- (NSString *)stringByAppendingPathScale:(CGFloat)scale;

/**
 Return the path scale.
 
 e.g.
 <table>
 <tr><th>Path            </th><th>Scale </th></tr>
 <tr><td>"icon.png"      </td><td>1     </td></tr>
 <tr><td>"icon@2x.png"   </td><td>2     </td></tr>
 <tr><td>"icon@2.5x.png" </td><td>2.5   </td></tr>
 <tr><td>"icon@2x"       </td><td>1     </td></tr>
 <tr><td>"icon@2x..png"  </td><td>1     </td></tr>
 <tr><td>"icon@2x.png/"  </td><td>1     </td></tr>
 </table>
 */
- (CGFloat)pathScale;

/**
 nil, @"", @"  ", @"\n" will Returns NO; otherwise Returns YES.
 */
- (BOOL)isNotBlank;

/**
 Returns YES if the target string is contained within the receiver.
 @param string A string to test the the receiver.
 
 @discussion Apple has implemented this method in iOS8.
 */
- (BOOL)containsString:(NSString *)string;

/**
 Returns YES if the target CharacterSet is contained within the receiver.
 @param set  A character set to test the the receiver.
 */
- (BOOL)containsCharacterSet:(NSCharacterSet *)set;

/**
 Returns NSMakeRange(0, self.length).
 */
- (NSRange)rangeOfAll;


/**
 Create a string from the file in main bundle (similar to [UIImage imageNamed:]).
 
 @param name The file name (in main bundle).
 
 @return A new string create from the file in UTF-8 character encoding.
 */
+ (NSString *)stringNamed:(NSString *)name;

@end