source: trunk/Cocoa/Pester/Source/NSString-NJRExtensions.m@ 102

Last change on this file since 102 was 102, checked in by Nicholas Riley, 19 years ago

Pester 1.1b3

File size: 2.9 KB
Line 
1//
2// NSString-NJRExtensions.m
3// Pester
4//
5// Created by Nicholas Riley on Mon Dec 16 2002.
6// Copyright (c) 2002 Nicholas Riley. All rights reserved.
7//
8
9#import "NSString-NJRExtensions.h"
10
11@implementation NSString (NJRExtensions)
12
13- (NSAttributedString *)attributedStringWithFont:(NSFont *)font;
14{
15 return [[[NSAttributedString alloc] initWithString: self attributes: [NSDictionary dictionaryWithObject: font forKey: NSFontAttributeName]] autorelease];
16}
17
18- (NSAttributedString *)underlined;
19{
20 return [[[NSAttributedString alloc] initWithString: self attributes: [NSDictionary dictionaryWithObject: [NSNumber numberWithInt: NSSingleUnderlineStyle] forKey: NSUnderlineStyleAttributeName]] autorelease];
21}
22
23- (NSAttributedString *)small;
24{
25 return [self attributedStringWithFont: [NSFont systemFontOfSize: [NSFont smallSystemFontSize]]];
26}
27
28- (NSAttributedString *)smallBold;
29{
30 return [self attributedStringWithFont: [NSFont boldSystemFontOfSize: [NSFont smallSystemFontSize]]];
31}
32
33+ (NSString *)ellipsisString;
34{
35 static NSString *ellipsis = nil;
36 if (ellipsis == nil) {
37 const unichar ellipsisChar = 0x2026;
38 ellipsis = [[NSString alloc] initWithCharacters: &ellipsisChar length: 1];
39 }
40 return ellipsis;
41}
42
43@end
44
45@implementation NSMutableString (NJRExtensions)
46
47- (void)truncateToLength:(unsigned)maxLength by:(NSLineBreakMode)method;
48{
49 if ([self length] > maxLength) {
50 NSRange range = {0, [self length] - maxLength};
51 switch (method) {
52 case NSLineBreakByTruncatingHead:
53 range.location = 0;
54 break;
55 case NSLineBreakByTruncatingMiddle:
56 range.location = maxLength / 2;
57 break;
58 case NSLineBreakByTruncatingTail:
59 range.location = maxLength;
60 break;
61 default:
62 range.location = maxLength;
63 break;
64 }
65 [self replaceCharactersInRange: range withString: [NSString ellipsisString]];
66 }
67}
68
69- (void)truncateToWidth:(float)maxWidth by:(NSLineBreakMode)method withAttributes:(NSDictionary *)attributes;
70{
71 if ([self sizeWithAttributes: attributes].width > maxWidth) {
72 float width = maxWidth;
73 int min = 0, max = [self length], avg;
74 NSMutableString *original = [self mutableCopy];
75 while (max >= min) {
76 avg = (max + min) / 2;
77 [self truncateToLength: avg by: method];
78 width = [self sizeWithAttributes: attributes].width;
79 if (width > maxWidth) {
80 max = avg - 1; // too wide
81 } else if (width == maxWidth) {
82 break;
83 } else {
84 min = avg + 1; // too narrow
85 [self setString: original];
86 }
87 }
88 if (width != maxWidth)
89 [self truncateToLength: max by: method];
90 [original release];
91 }
92}
93
94@end
Note: See TracBrowser for help on using the repository browser.