// // OSKTwitterText.m // // Copyright 2012 Twitter, Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // #import "OSKTwitterText.h" // // These regular expressions are ported from twitter-text-rb on Apr 24 2012. // #define TWUControlCharacters @"\\u0009-\\u000D" #define TWUSpace @"\\u0020" #define TWUControl85 @"\\u0085" #define TWUNoBreakSpace @"\\u00A0" #define TWUOghamBreakSpace @"\\u1680" #define TWUMongolianVowelSeparator @"\\u180E" #define TWUWhiteSpaces @"\\u2000-\\u200A" #define TWULineSeparator @"\\u2028" #define TWUParagraphSeparator @"\\u2029" #define TWUNarrowNoBreakSpace @"\\u202F" #define TWUMediumMathematicalSpace @"\\u205F" #define TWUIdeographicSpace @"\\u3000" #define TWUUnicodeSpaces \ TWUControlCharacters \ TWUSpace \ TWUControl85 \ TWUNoBreakSpace \ TWUOghamBreakSpace \ TWUMongolianVowelSeparator \ TWUWhiteSpaces \ TWULineSeparator \ TWUParagraphSeparator \ TWUNarrowNoBreakSpace \ TWUMediumMathematicalSpace \ TWUIdeographicSpace #define TWUInvalidCharacters @"\\uFFFE\\uFEFF\\uFFFF\\u202A-\\u202E" #define TWULatinAccents \ @"\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u00FF\\u0100-\\u024F\\u0253-\\u0254\\u0256-\\u0257\\u0259\\u025b\\u0263\\u0268\\u026F\\u0272\\u0289\\u02BB\\u1E00-\\u1EFF" // // Hashtag // #define TWUCyrillicHashtagChars @"\\u0400-\\u04FF" #define TWUCyrillicSupplementHashtagChars @"\\u0500-\\u0527" #define TWUCyrillicExtendedAHashtagChars @"\\u2DE0-\\u2DFF" #define TWUCyrillicExtendedBHashtagChars @"\\uA640-\\uA69F" #define TWUHebrewHashtagChars @"\\u0591-\\u05BF\\u05C1-\\u05C2\\u05C4-\\u05C5\\u05C7\\u05D0-\\u05EA\\u05F0-\\u05F4" #define TWUHebrewPresentationFormsHashtagChars @"\\uFB12-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40-\\uFB41\\uFB43-\\uFB44\\uFB46-\\uFB4F" #define TWUArabicHashtagChars @"\\u0610-\\u061A\\u0620-\\u065F\\u066E-\\u06D3\\u06D5-\\u06DC\\u06DE-\\u06E8\\u06EA-\\u06EF\\u06FA-\\u06FC\\u06FF" #define TWUArabicSupplementHashtagChars @"\\u0750-\\u077F" #define TWUArabicExtendedAHashtagChars @"\\u08A0\\u08A2-\\u08AC\\u08E4-\\u08FE" #define TWUArabicPresentationFormsAHashtagChars @"\\uFB50-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB" #define TWUArabicPresentationFormsBHashtagChars @"\\uFE70-\\uFE74\\uFE76-\\uFEFC" #define TWUZeroWidthNonJoiner @"\\u200C" #define TWUThaiHashtagChars @"\\u0E01-\\u0E3A" #define TWUHangulHashtagChars @"\\u0E40-\\u0E4E" #define TWUHangulJamoHashtagChars @"\\u1100-\\u11FF" #define TWUHangulCompatibilityJamoHashtagChars @"\\u3130-\\u3185" #define TWUHangulJamoExtendedAHashtagChars @"\\uA960-\\uA97F" #define TWUHangulSyllablesHashtagChars @"\\uAC00-\\uD7AF" #define TWUHangulJamoExtendedBHashtagChars @"\\uD7B0-\\uD7FF" #define TWUHalfWidthHangulHashtagChars @"\\uFFA1-\\uFFDC" #define TWUNonLatinHashtagChars \ TWUCyrillicHashtagChars \ TWUCyrillicSupplementHashtagChars \ TWUCyrillicExtendedAHashtagChars \ TWUCyrillicExtendedBHashtagChars \ TWUHebrewHashtagChars \ TWUHebrewPresentationFormsHashtagChars \ TWUArabicHashtagChars \ TWUArabicSupplementHashtagChars \ TWUArabicExtendedAHashtagChars \ TWUArabicPresentationFormsAHashtagChars \ TWUArabicPresentationFormsBHashtagChars \ TWUZeroWidthNonJoiner \ TWUThaiHashtagChars \ TWUHangulHashtagChars \ TWUHangulJamoHashtagChars \ TWUHangulCompatibilityJamoHashtagChars \ TWUHangulJamoExtendedAHashtagChars \ TWUHangulSyllablesHashtagChars \ TWUHangulJamoExtendedBHashtagChars \ TWUHalfWidthHangulHashtagChars #define TWUKatakanaHashtagChars @"\\u30A1-\\u30FA\\u30FC-\\u30FE" #define TWUKatakanaHalfWidthHashtagChars @"\\uFF66-\\uFF9F" #define TWULatinFullWidthHashtagChars @"\\uFF10-\\uFF19\\uFF21-\\uFF3A\\uFF41-\\uFF5A" #define TWUHiraganaHashtagChars @"\\u3041-\\u3096\\u3099-\\u309E" #define TWUCJKExtensionAHashtagChars @"\\u3400-\\u4DBF" #define TWUCJKUnifiedHashtagChars @"\\u4E00-\\u9FFF" #define TWUCJKExtensionBHashtagChars @"\\U00020000-\\U0002A6DF" #define TWUCJKExtensionCHashtagChars @"\\U0002A700-\\U0002B73F" #define TWUCJKExtensionDHashtagChars @"\\U0002B740-\\U0002B81F" #define TWUCJKSupplementHashtagChars @"\\U0002F800-\\U0002FA1F\\u3003\\u3005\\u303B" #define TWUCJKHashtagCharacters \ TWUKatakanaHashtagChars \ TWUKatakanaHalfWidthHashtagChars \ TWULatinFullWidthHashtagChars \ TWUHiraganaHashtagChars \ TWUCJKExtensionAHashtagChars \ TWUCJKUnifiedHashtagChars \ TWUCJKExtensionBHashtagChars \ TWUCJKExtensionCHashtagChars \ TWUCJKExtensionDHashtagChars \ TWUCJKSupplementHashtagChars #define TWUPunctuationChars @"\\-_!\"#$%&'()*+,./:;<=>?@\\[\\]^`{|}~" #define TWUPunctuationCharsWithoutHyphen @"_!\"#$%&'()*+,./:;<=>?@\\[\\]^`{|}~" #define TWUPunctuationCharsWithoutHyphenAndUnderscore @"!\"#$%&'()*+,./:;<=>?@\\[\\]^`{|}~" #define TWUCtrlChars @"\\x00-\\x1F\\x7F" #define TWHashtagAlpha \ @"[a-z_" \ TWULatinAccents \ TWUNonLatinHashtagChars \ TWUCJKHashtagCharacters \ @"]" #define TWUHashtagAlphanumeric \ @"[a-z0-9_" \ TWULatinAccents \ TWUNonLatinHashtagChars \ TWUCJKHashtagCharacters \ @"]" #define TWUHashtagBoundary \ @"^|$|[^&a-z0-9_" \ TWULatinAccents \ TWUNonLatinHashtagChars \ TWUCJKHashtagCharacters \ @"]" #define TWUValidHashtag \ @"(?:" TWUHashtagBoundary @")([#＃]" TWUHashtagAlphanumeric @"*" TWHashtagAlpha TWUHashtagAlphanumeric @"*)" #define TWUEndHashTagMatch @"\\A(?:[#＃]|://)" // // Cashtag // #define TWUCashtag @"[a-z]{1,6}(?:[._][a-z]{1,2})?" #define TWUValidCashtag \ @"(?:^|[" TWUUnicodeSpaces @"])" \ @"(\\$" TWUCashtag @")" \ @"(?=$|\\s|[" TWUPunctuationChars @"])" // // Mention and list name // #define TWUValidMentionPrecedingChars @"(?:[^a-zA-Z0-9_!#$%&*@＠]|^|RT:?)" #define TWUAtSigns @"[@＠]" #define TWUValidUsername @"\\A" TWUAtSigns @"[a-zA-Z0-9_]{1,20}\\z" #define TWUValidList @"\\A" TWUAtSigns @"[a-zA-Z0-9_]{1,20}/[a-zA-Z][a-zA-Z0-9_\\-]{0,24}\\z" #define TWUValidMentionOrList \ @"(" TWUValidMentionPrecedingChars @")" \ @"(" TWUAtSigns @")" \ @"([a-zA-Z0-9_]{1,20})" \ @"(/[a-zA-Z][a-zA-Z0-9_\\-]{0,24})?" #define TWUValidReply @"\\A(?:[" TWUUnicodeSpaces @"])*" TWUAtSigns @"([a-zA-Z0-9_]{1,20})" #define TWUEndMentionMatch @"\\A(?:" TWUAtSigns @"|[" TWULatinAccents @"]|://)" // // URL // #define TWUValidURLPrecedingChars @"(?:[^a-zA-Z0-9@＠$#＃" TWUInvalidCharacters @"]|^)" #define TWUDomainValidStartEndChars \ @"[^" \ TWUPunctuationChars \ TWUCtrlChars \ TWUInvalidCharacters \ TWUUnicodeSpaces \ @"]" #define TWUSubdomainValidMiddleChars \ @"[^" \ TWUPunctuationCharsWithoutHyphenAndUnderscore \ TWUCtrlChars \ TWUInvalidCharacters \ TWUUnicodeSpaces \ @"]" #define TWUDomainValidMiddleChars \ @"[^" \ TWUPunctuationCharsWithoutHyphen \ TWUCtrlChars \ TWUInvalidCharacters \ TWUUnicodeSpaces \ @"]" #define TWUValidSubdomain \ @"(?:" \ @"(?:" TWUDomainValidStartEndChars TWUSubdomainValidMiddleChars @"*)?" TWUDomainValidStartEndChars @"\\." \ @")" #define TWUValidDomainName \ @"(?:" \ @"(?:" TWUDomainValidStartEndChars TWUDomainValidMiddleChars @"*)?" TWUDomainValidStartEndChars @"\\." \ @")" #define TWUValidGTLD @"(?:(?:aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel|xxx)(?=[^0-9a-z]|$))" #define TWUValidCCTLD \ @"(?:" \ @"(?:" \ @"ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|" \ @"bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|" \ @"cs|cu|cv|cx|cy|cz|dd|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|" \ @"fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|" \ @"ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|" \ @"ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mk|ml|mm|mn|mo|mp|" \ @"mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|" \ @"pf|pg|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|" \ @"si|sj|sk|sl|sm|sn|so|sr|ss|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|" \ @"tp|tr|tt|tv|tw|tz|ua|ug|uk|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|za|zm|" \ @"zw" \ @")" \ @"(?=[^0-9a-z]|$)" \ @")" #define TWUValidPunycode @"(?:xn--[0-9a-z]+)" #define TWUValidDomain \ @"(?:" \ TWUValidSubdomain @"*" TWUValidDomainName \ @"(?:" TWUValidGTLD @"|" TWUValidCCTLD @"|" TWUValidPunycode @")" \ @")" #define TWUValidASCIIDomain \ @"(?:[a-zA-Z0-9\\-_" TWULatinAccents @"]+\\.)+" \ @"(?:" TWUValidGTLD @"|" TWUValidCCTLD @"|" TWUValidPunycode @")" \ #define TWUValidTCOURL @"https?://t\\.co/[a-zA-Z0-9]+" #define TWUInvalidShortDomain @"\\A" TWUValidDomainName TWUValidCCTLD @"\\z" #define TWUValidPortNumber @"[0-9]+" #define TWUValidGeneralURLPathChars @"[a-zA-Z0-9!\\*';:=+,.$/%#\\[\\]\\-_~&|@" TWULatinAccents @"]" #define TWUValidURLBalancedParens @"\\(" TWUValidGeneralURLPathChars @"+\\)" #define TWUValidURLPathEndingChars @"[a-zA-Z0-9=_#/+\\-" TWULatinAccents @"]|(?:" TWUValidURLBalancedParens @")" #define TWUValidURLPath \ @"(?:" \ @"(?:" \ TWUValidGeneralURLPathChars @"*" \ @"(?:" TWUValidURLBalancedParens TWUValidGeneralURLPathChars @"*)*" TWUValidURLPathEndingChars \ @")" \ @"|" \ @"(?:" TWUValidGeneralURLPathChars @"+/)" \ @")" #define TWUValidURLQueryChars @"[a-zA-Z0-9!?*'\\(\\);:&=+$/%#\\[\\]\\-_\\.,~|@]" #define TWUValidURLQueryEndingChars @"[a-zA-Z0-9_&=#/]" #define TWUValidURL \ @"(" \ @"(" TWUValidURLPrecedingChars @")" \ @"(" \ @"(https?://)?" \ @"(" TWUValidDomain @")" \ @"(?::(" TWUValidPortNumber @"))?" \ @"(/" TWUValidURLPath @"*)?" \ @"(\\?" TWUValidURLQueryChars @"*" TWUValidURLQueryEndingChars @")?" \ @")" \ @")" static const NSInteger MaxTweetLength = 140; static const NSInteger HTTPShortURLLength = 22; static const NSInteger HTTPSShortURLLength = 23; @implementation OSKTwitterText + (NSArray*)entitiesInText:(NSString*)text { if (!text.length) { return [NSArray array]; } NSMutableArray *results = [NSMutableArray array]; NSArray *urls = [self URLsInText:text]; [results addObjectsFromArray:urls]; NSArray *hashtags = [self hashtagsInText:text withURLEntities:urls]; [results addObjectsFromArray:hashtags]; NSArray *cashtags = [self symbolsInText:text withURLEntities:urls]; [results addObjectsFromArray:cashtags]; NSArray *mentionsAndLists = [self mentionsOrListsInText:text]; NSMutableArray *addingItems = [NSMutableArray array]; for (OSKTwitterTextEntity *entity in mentionsAndLists) { NSRange entityRange = entity.range; BOOL found = NO; for (OSKTwitterTextEntity *existingEntity in results) { if (NSIntersectionRange(existingEntity.range, entityRange).length > 0) { found = YES; break; } } if (!found) { [addingItems addObject:entity]; } } [results addObjectsFromArray:addingItems]; [results sortUsingSelector:@selector(compare:)]; return results; } + (NSArray*)URLsInText:(NSString*)text { if (!text.length) { return [NSArray array]; } NSMutableArray *results = [NSMutableArray array]; NSInteger len = text.length; NSInteger position = 0; NSRange allRange = NSMakeRange(0, 0); while (1) { position = NSMaxRange(allRange); NSTextCheckingResult *urlResult = [[self validURLRegexp] firstMatchInString:text options:NSMatchingWithoutAnchoringBounds range:NSMakeRange(position, len - position)]; if (!urlResult || urlResult.numberOfRanges < 9) { break; } allRange = urlResult.range; NSRange precedingRange = [urlResult rangeAtIndex:2]; NSRange urlRange = [urlResult rangeAtIndex:3]; NSRange protocolRange = [urlResult rangeAtIndex:4]; NSRange domainRange = [urlResult rangeAtIndex:5]; // If protocol is missing and domain contains non-ASCII characters, // extract ASCII-only domains. if (protocolRange.location == NSNotFound) { if (precedingRange.location != NSNotFound && precedingRange.length > 0) { NSString *preceding = [text substringWithRange:precedingRange]; NSRange suffixRange = [preceding rangeOfCharacterFromSet:[self invalidURLWithoutProtocolPrecedingCharSet] options:NSBackwardsSearch | NSAnchoredSearch]; if (suffixRange.location != NSNotFound) { continue; } } NSInteger domainStart = domainRange.location; NSInteger domainEnd = NSMaxRange(domainRange); OSKTwitterTextEntity *lastEntity = nil; BOOL lastInvalidShortResult = NO; while (domainStart < domainEnd) { NSTextCheckingResult *asciiResult = [[self validASCIIDomainRegexp] firstMatchInString:text options:0 range:NSMakeRange(domainStart, domainEnd - domainStart)]; if (!asciiResult) { break; } urlRange = asciiResult.range; lastEntity = [OSKTwitterTextEntity entityWithType:OSKTwitterTextEntityURL range:urlRange]; NSTextCheckingResult *invalidShortResult = [[self invalidShortDomainRegexp] firstMatchInString:text options:0 range:urlRange]; lastInvalidShortResult = (invalidShortResult != nil); if (!lastInvalidShortResult) { [results addObject:lastEntity]; } domainStart = NSMaxRange(urlRange); } if (!lastEntity) { continue; } NSRange pathRange = [urlResult rangeAtIndex:7]; if (pathRange.location != NSNotFound && NSMaxRange(lastEntity.range) == pathRange.location) { if (lastInvalidShortResult) { [results addObject:lastEntity]; } NSRange entityRange = lastEntity.range; entityRange.length += pathRange.length; lastEntity.range = entityRange; } } else { // In the case of t.co URLs, don't allow additional path characters NSRange tcoRange = [[self validTCOURLRegexp] rangeOfFirstMatchInString:text options:0 range:urlRange]; if (tcoRange.location != NSNotFound) { urlRange.length = tcoRange.length; } OSKTwitterTextEntity *entity = [OSKTwitterTextEntity entityWithType:OSKTwitterTextEntityURL range:urlRange]; [results addObject:entity]; } } return results; } + (NSArray*)hashtagsInText:(NSString*)text checkingURLOverlap:(BOOL)checkingURLOverlap { if (!text.length) { return [NSArray array]; } NSArray *urls = nil; if (checkingURLOverlap) { urls = [self URLsInText:text]; } return [self hashtagsInText:text withURLEntities:urls]; } + (NSArray*)hashtagsInText:(NSString*)text withURLEntities:(NSArray*)urlEntities { if (!text.length) { return [NSArray array]; } NSMutableArray *results = [NSMutableArray array]; NSInteger len = text.length; NSInteger position = 0; while (1) { NSTextCheckingResult *matchResult = [[self validHashtagRegexp] firstMatchInString:text options:NSMatchingWithoutAnchoringBounds range:NSMakeRange(position, len - position)]; if (!matchResult || matchResult.numberOfRanges < 2) { break; } NSRange hashtagRange = [matchResult rangeAtIndex:1]; BOOL matchOk = YES; // Check URL overlap for (OSKTwitterTextEntity *urlEntity in urlEntities) { if (NSIntersectionRange(urlEntity.range, hashtagRange).length > 0) { matchOk = NO; break; } } if (matchOk) { NSInteger afterStart = NSMaxRange(hashtagRange); if (afterStart < len) { NSRange endMatchRange = [[self endHashtagRegexp] rangeOfFirstMatchInString:text options:0 range:NSMakeRange(afterStart, len - afterStart)]; if (endMatchRange.location != NSNotFound) { matchOk = NO; } } if (matchOk) { OSKTwitterTextEntity *entity = [OSKTwitterTextEntity entityWithType:OSKTwitterTextEntityHashtag range:hashtagRange]; [results addObject:entity]; } } position = NSMaxRange(matchResult.range); } return results; } + (NSArray*)symbolsInText:(NSString*)text checkingURLOverlap:(BOOL)checkingURLOverlap { if (!text.length) { return [NSArray array]; } NSArray *urls = nil; if (checkingURLOverlap) { urls = [self URLsInText:text]; } return [self symbolsInText:text withURLEntities:urls]; } + (NSArray*)symbolsInText:(NSString*)text withURLEntities:(NSArray*)urlEntities { if (!text.length) { return [NSArray array]; } NSMutableArray *results = [NSMutableArray array]; NSInteger len = text.length; NSInteger position = 0; while (1) { NSTextCheckingResult *matchResult = [[self validCashtagRegexp] firstMatchInString:text options:NSMatchingWithoutAnchoringBounds range:NSMakeRange(position, len - position)]; if (!matchResult || matchResult.numberOfRanges < 2) { break; } NSRange symbolRange = [matchResult rangeAtIndex:1]; BOOL matchOk = YES; // Check URL overlap for (OSKTwitterTextEntity *urlEntity in urlEntities) { if (NSIntersectionRange(urlEntity.range, symbolRange).length > 0) { matchOk = NO; break; } } if (matchOk) { OSKTwitterTextEntity *entity = [OSKTwitterTextEntity entityWithType:OSKTwitterTextEntitySymbol range:symbolRange]; [results addObject:entity]; } position = NSMaxRange(matchResult.range); } return results; } + (NSArray*)mentionedScreenNamesInText:(NSString*)text { if (!text.length) { return [NSArray array]; } NSArray *mentionsOrLists = [self mentionsOrListsInText:text]; NSMutableArray *results = [NSMutableArray array]; for (OSKTwitterTextEntity *entity in mentionsOrLists) { if (entity.type == OSKTwitterTextEntityScreenName) { [results addObject:entity]; } } return results; } + (NSArray*)mentionsOrListsInText:(NSString*)text { if (!text.length) { return [NSArray array]; } NSMutableArray *results = [NSMutableArray array]; NSInteger len = text.length; NSInteger position = 0; while (1) { NSTextCheckingResult *matchResult = [[self validMentionOrListRegexp] firstMatchInString:text options:NSMatchingWithoutAnchoringBounds range:NSMakeRange(position, len - position)]; if (!matchResult || matchResult.numberOfRanges < 5) { break; } NSRange allRange = matchResult.range; NSInteger end = NSMaxRange(allRange); NSRange endMentionRange = [[self endMentionRegexp] rangeOfFirstMatchInString:text options:0 range:NSMakeRange(end, len - end)]; if (endMentionRange.location == NSNotFound) { NSRange atSignRange = [matchResult rangeAtIndex:2]; NSRange screenNameRange = [matchResult rangeAtIndex:3]; NSRange listNameRange = [matchResult rangeAtIndex:4]; if (listNameRange.location == NSNotFound) { OSKTwitterTextEntity *entity = [OSKTwitterTextEntity entityWithType:OSKTwitterTextEntityScreenName range:NSMakeRange(atSignRange.location, NSMaxRange(screenNameRange) - atSignRange.location)]; [results addObject:entity]; } else { OSKTwitterTextEntity *entity = [OSKTwitterTextEntity entityWithType:OSKTwitterTextEntityListName range:NSMakeRange(atSignRange.location, NSMaxRange(listNameRange) - atSignRange.location)]; [results addObject:entity]; } } else { // Avoid matching the second username in @username@username end++; } position = end; } return results; } + (OSKTwitterTextEntity*)repliedScreenNameInText:(NSString*)text { if (!text.length) { return nil; } NSInteger len = text.length; NSTextCheckingResult *matchResult = [[self validReplyRegexp] firstMatchInString:text options:(NSMatchingWithoutAnchoringBounds | NSMatchingAnchored) range:NSMakeRange(0, len)]; if (!matchResult || matchResult.numberOfRanges < 2) { return nil; } NSRange replyRange = [matchResult rangeAtIndex:1]; NSInteger replyEnd = NSMaxRange(replyRange); NSRange endMentionRange = [[self endMentionRegexp] rangeOfFirstMatchInString:text options:0 range:NSMakeRange(replyEnd, len - replyEnd)]; if (endMentionRange.location != NSNotFound) { return nil; } return [OSKTwitterTextEntity entityWithType:OSKTwitterTextEntityScreenName range:replyRange]; } + (NSInteger)tweetLength:(NSString*)text { return [self tweetLength:text httpURLLength:HTTPShortURLLength httpsURLLength:HTTPSShortURLLength]; } + (NSInteger)tweetLength:(NSString*)text httpURLLength:(NSInteger)httpURLLength httpsURLLength:(NSInteger)httpsURLLength { text = [text precomposedStringWithCanonicalMapping]; if (!text.length) { return 0; } // Remove URLs from text and add t.co length NSMutableString *string = [text mutableCopy]; #if !__has_feature(objc_arc) [string autorelease]; #endif int urlLengthOffset = 0; NSArray *urlEntities = [self URLsInText:text]; for (NSInteger i=urlEntities.count-1; i>=0; i--) { OSKTwitterTextEntity *entity = [urlEntities objectAtIndex:i]; NSRange urlRange = entity.range; NSString *url = [string substringWithRange:urlRange]; if ([url rangeOfString:@"https" options:(NSCaseInsensitiveSearch | NSAnchoredSearch)].location == 0) { urlLengthOffset += httpsURLLength; } else { urlLengthOffset += httpURLLength; } [string deleteCharactersInRange:urlRange]; } NSInteger len = string.length; NSInteger charCount = len + urlLengthOffset; if (len > 0) { // Adjust count for non-BMP characters UniChar buffer[len]; [string getCharacters:buffer range:NSMakeRange(0, len)]; for (int i=0; i