NSString+Utils.mm 3.4 KB

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  1. /* ***** BEGIN LICENSE BLOCK *****
  2. * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  3. *
  4. * The contents of this file are subject to the Mozilla Public License Version
  5. * 1.1 (the "License"); you may not use this file except in compliance with
  6. * the License. You may obtain a copy of the License at
  7. * http://www.mozilla.org/MPL/
  8. *
  9. * Software distributed under the License is distributed on an "AS IS" basis,
  10. * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11. * for the specific language governing rights and limitations under the
  12. * License.
  13. *
  14. * The Original Code is Chimera code.
  15. *
  16. * The Initial Developer of the Original Code is
  17. * Netscape Communications Corporation.
  18. * Portions created by the Initial Developer are Copyright (C) 2002
  19. * the Initial Developer. All Rights Reserved.
  20. *
  21. * Contributor(s):
  22. * Simon Fraser <sfraser@netscape.com>
  23. * David Haas <haasd@cae.wisc.edu>
  24. *
  25. * Alternatively, the contents of this file may be used under the terms of
  26. * either the GNU General Public License Version 2 or later (the "GPL"), or
  27. * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28. * in which case the provisions of the GPL or the LGPL are applicable instead
  29. * of those above. If you wish to allow use of your version of this file only
  30. * under the terms of either the GPL or the LGPL, and not to allow others to
  31. * use your version of this file under the terms of the MPL, indicate your
  32. * decision by deleting the provisions above and replace them with the notice
  33. * and other provisions required by the GPL or the LGPL. If you do not delete
  34. * the provisions above, a recipient may use your version of this file under
  35. * the terms of any one of the MPL, the GPL or the LGPL.
  36. *
  37. * ***** END LICENSE BLOCK ***** */
  38. #import <AppKit/AppKit.h> // for NSStringDrawing.h
  39. #import "NSString+Utils.h"
  40. #include "url/gurl.h"
  41. @implementation NSString (ChimeraStringUtils)
  42. - (BOOL)hasCaseInsensitivePrefix:(NSString*)inString
  43. {
  44. if ([self length] < [inString length])
  45. return NO;
  46. return ([self compare:inString options:NSCaseInsensitiveSearch range:NSMakeRange(0, [inString length])] == NSOrderedSame);
  47. }
  48. - (BOOL)isLooselyValidatedURI
  49. {
  50. return ([self hasCaseInsensitivePrefix:@"javascript:"] || [self hasCaseInsensitivePrefix:@"data:"]);
  51. }
  52. - (BOOL)isValidURI
  53. {
  54. // isValid() will only be true for valid, well-formed URI strings
  55. GURL testURL([self UTF8String]);
  56. // |javascript:| and |data:| URIs might not have passed the test,
  57. // but spaces will work OK, so evaluate them separately.
  58. if (testURL.is_valid() || [self isLooselyValidatedURI]) {
  59. return YES;
  60. }
  61. return NO;
  62. }
  63. - (NSString *)stringByRemovingCharactersInSet:(NSCharacterSet*)characterSet
  64. {
  65. NSScanner* cleanerScanner = [NSScanner scannerWithString:self];
  66. NSMutableString* cleanString = [NSMutableString stringWithCapacity:[self length]];
  67. // Make sure we don't skip whitespace, which NSScanner does by default
  68. [cleanerScanner setCharactersToBeSkipped:[NSCharacterSet characterSetWithCharactersInString:@""]];
  69. while (![cleanerScanner isAtEnd]) {
  70. NSString* stringFragment;
  71. if ([cleanerScanner scanUpToCharactersFromSet:characterSet intoString:&stringFragment])
  72. [cleanString appendString:stringFragment];
  73. [cleanerScanner scanCharactersFromSet:characterSet intoString:nil];
  74. }
  75. return cleanString;
  76. }
  77. - (NSString *)stringByTrimmingWhitespace
  78. {
  79. return [self stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
  80. }
  81. @end