136 lines
3.5 KiB
Objective-C
Executable File
136 lines
3.5 KiB
Objective-C
Executable File
/*
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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] autorelease];
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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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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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