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/* |
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BSD License |
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Copyright (c) 2002, Brent Simmons |
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All rights reserved. |
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Redistribution and use in source and binary forms, with or without modification, |
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are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright notice, |
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this list of conditions and the following disclaimer in the documentation |
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and/or other materials provided with the distribution. |
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* Neither the name of ranchero.com or Brent Simmons nor the names of its |
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contributors may be used to endorse or promote products derived |
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from this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
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BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* |
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NSString+extras.m |
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NetNewsWire |
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Created by Brent Simmons on Fri Jun 14 2002. |
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Copyright (c) 2002 Brent Simmons. All rights reserved. |
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*/ |
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#import "NSString+extras.h" |
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@implementation NSString (extras) |
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- (NSString *)stringWithSubstitute:(NSString *)subs forCharactersFromSet:(NSCharacterSet *)set |
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{ |
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NSRange r = [self rangeOfCharacterFromSet:set]; |
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if (r.location == NSNotFound) return self; |
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NSMutableString *newString = [self mutableCopy]; |
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do |
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{ |
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[newString replaceCharactersInRange:r withString:subs]; |
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r = [newString rangeOfCharacterFromSet:set]; |
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} |
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while (r.location != NSNotFound); |
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return [newString autorelease]; |
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} |
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- (NSString *) trimWhiteSpace { |
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NSMutableString *s = [[self mutableCopy] autorelease]; |
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CFStringTrimWhitespace ((CFMutableStringRef) s); |
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return (NSString *) [[s copy] autorelease]; |
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} /*trimWhiteSpace*/ |
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- (NSString *) ellipsizeAfterNWords: (int) n { |
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NSArray *stringComponents = [self componentsSeparatedByString: @" "]; |
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NSMutableArray *componentsCopy = [stringComponents mutableCopy]; |
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int ix = n; |
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int len = [componentsCopy count]; |
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if (len < n) |
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ix = len; |
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[componentsCopy removeObjectsInRange: NSMakeRange (ix, len - ix)]; |
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[componentsCopy autorelease]; |
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return [componentsCopy componentsJoinedByString: @" "]; |
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} /*ellipsizeAfterNWords*/ |
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- (NSString *) stripHTML { |
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int len = [self length]; |
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NSMutableString *s = [NSMutableString stringWithCapacity: len]; |
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int i = 0, level = 0; |
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for (i = 0; i < len; i++) { |
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NSString *ch = [self substringWithRange: NSMakeRange (i, 1)]; |
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if ([ch isEqualTo: @"<"]) |
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level++; |
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else if ([ch isEqualTo: @">"]) { |
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level--; |
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if (level == 0) |
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[s appendString: @" "]; |
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} /*else if*/ |
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else if (level == 0) |
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[s appendString: ch]; |
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} /*for*/ |
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return (NSString *) [[s copy] autorelease]; |
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} /*stripHTML*/ |
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+ (BOOL) stringIsEmpty: (NSString *) s { |
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NSString *copy; |
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if (s == nil) |
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return (YES); |
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if ([s isEqualTo: @""]) |
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return (YES); |
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copy = [[s copy] autorelease]; |
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if ([[copy trimWhiteSpace] isEqualTo: @""]) |
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return (YES); |
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return (NO); |
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} /*stringIsEmpty*/ |
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@end |
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