// // WBStatusComposeTextParser.m // YYKitExample // // Created by ibireme on 15/9/5. // Copyright (C) 2015 ibireme. All rights reserved. // #import "WBStatusComposeTextParser.h" #import "WBStatusHelper.h" @implementation WBStatusComposeTextParser - (instancetype)init { self = [super init]; _font = [UIFont systemFontOfSize:17]; _textColor = [UIColor colorWithWhite:0.2 alpha:1]; _highlightTextColor = UIColorHex(527ead); return self; } - (BOOL)parseText:(NSMutableAttributedString *)text selectedRange:(NSRangePointer)selectedRange { text.color = _textColor; // 此处没有进行优化，性能较低，只是为了功能演示 { static NSArray *topicExts, *topicExtImages; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ topicExts = @[ @"[电影]#", @"[图书]#", @"[音乐]#", @"[地点]#", @"[股票]#" ]; topicExtImages = @[ [WBStatusHelper imageNamed:@"timeline_card_small_movie"], [WBStatusHelper imageNamed:@"timeline_card_small_book"], [WBStatusHelper imageNamed:@"timeline_card_small_music"], [WBStatusHelper imageNamed:@"timeline_card_small_location"], [WBStatusHelper imageNamed:@"timeline_card_small_stock"] ]; }); NSArray *topicResults = [[WBStatusHelper regexTopic] matchesInString:text.string options:kNilOptions range:text.rangeOfAll]; NSUInteger clipLength = 0; for (NSTextCheckingResult *topic in topicResults) { if (topic.range.location == NSNotFound && topic.range.length <= 1) continue; NSRange range = topic.range; range.location -= clipLength; __block BOOL containsBindingRange = NO; [text enumerateAttribute:YYTextBindingAttributeName inRange:range options:NSAttributedStringEnumerationLongestEffectiveRangeNotRequired usingBlock:^(id value, NSRange range, BOOL *stop) { if (value) { containsBindingRange = YES; *stop = YES; } }]; if (containsBindingRange) continue; BOOL hasExt = NO; NSString *subText = [text.string substringWithRange:range]; for (NSUInteger i = 0; i < topicExts.count; i++) { NSString *ext = topicExts[i]; if ([subText hasSuffix:ext] && subText.length > ext.length + 1) { NSMutableAttributedString *replace = [[NSMutableAttributedString alloc] initWithString:[subText substringWithRange:NSMakeRange(1, subText.length - 1 - ext.length)]]; NSAttributedString *pic = [self _attachmentWithFontSize:_font.pointSize image:topicExtImages[i] shrink:YES]; [replace insertAttributedString:pic atIndex:0]; replace.font = _font; replace.color = _highlightTextColor; // original text, used for text copy YYTextBackedString *backed = [YYTextBackedString stringWithString:subText]; [replace setTextBackedString:backed range:NSMakeRange(0, replace.length)]; [text replaceCharactersInRange:range withAttributedString:replace]; [text setTextBinding:[YYTextBinding bindingWithDeleteConfirm:YES] range:NSMakeRange(range.location, replace.length)]; [text setColor:_highlightTextColor range:NSMakeRange(range.location, replace.length)]; if (selectedRange) { *selectedRange = [self _replaceTextInRange:range withLength:replace.length selectedRange:*selectedRange]; } clipLength += range.length - replace.length; hasExt = YES; break; } } if (!hasExt) { [text setColor:_highlightTextColor range:range]; } } } { NSArray *atResults = [[WBStatusHelper regexAt] matchesInString:text.string options:kNilOptions range:text.rangeOfAll]; for (NSTextCheckingResult *at in atResults) { if (at.range.location == NSNotFound && at.range.length <= 1) continue; __block BOOL containsBindingRange = NO; [text enumerateAttribute:YYTextBindingAttributeName inRange:at.range options:NSAttributedStringEnumerationLongestEffectiveRangeNotRequired usingBlock:^(id value, NSRange range, BOOL *stop) { if (value) { containsBindingRange = YES; *stop = YES; } }]; if (containsBindingRange) continue; [text setColor:_highlightTextColor range:at.range]; } } { NSArray *emoticonResults = [[WBStatusHelper regexEmoticon] matchesInString:text.string options:kNilOptions range:text.rangeOfAll]; NSUInteger clipLength = 0; for (NSTextCheckingResult *emo in emoticonResults) { if (emo.range.location == NSNotFound && emo.range.length <= 1) continue; NSRange range = emo.range; range.location -= clipLength; if ([text attribute:YYTextAttachmentAttributeName atIndex:range.location]) continue; NSString *emoString = [text.string substringWithRange:range]; NSString *imagePath = [WBStatusHelper emoticonDic][emoString]; UIImage *image = [WBStatusHelper imageWithPath:imagePath]; if (!image) continue; __block BOOL containsBindingRange = NO; [text enumerateAttribute:YYTextBindingAttributeName inRange:range options:NSAttributedStringEnumerationLongestEffectiveRangeNotRequired usingBlock:^(id value, NSRange range, BOOL *stop) { if (value) { containsBindingRange = YES; *stop = YES; } }]; if (containsBindingRange) continue; YYTextBackedString *backed = [YYTextBackedString stringWithString:emoString]; NSMutableAttributedString *emoText = [NSAttributedString attachmentStringWithEmojiImage:image fontSize:_font.pointSize].mutableCopy; // original text, used for text copy [emoText setTextBackedString:backed range:NSMakeRange(0, emoText.length)]; [emoText setTextBinding:[YYTextBinding bindingWithDeleteConfirm:NO] range:NSMakeRange(0, emoText.length)]; [text replaceCharactersInRange:range withAttributedString:emoText]; if (selectedRange) { *selectedRange = [self _replaceTextInRange:range withLength:emoText.length selectedRange:*selectedRange]; } clipLength += range.length - emoText.length; } } [text enumerateAttribute:YYTextBindingAttributeName inRange:text.rangeOfAll options:NSAttributedStringEnumerationLongestEffectiveRangeNotRequired usingBlock:^(id value, NSRange range, BOOL *stop) { if (value && range.length > 1) { [text setColor:_highlightTextColor range:range]; } }]; text.font = _font; return YES; } // correct the selected range during text replacement - (NSRange)_replaceTextInRange:(NSRange)range withLength:(NSUInteger)length selectedRange:(NSRange)selectedRange { // no change if (range.length == length) return selectedRange; // right if (range.location >= selectedRange.location + selectedRange.length) return selectedRange; // left if (selectedRange.location >= range.location + range.length) { selectedRange.location = selectedRange.location + length - range.length; return selectedRange; } // same if (NSEqualRanges(range, selectedRange)) { selectedRange.length = length; return selectedRange; } // one edge same if ((range.location == selectedRange.location && range.length < selectedRange.length) || (range.location + range.length == selectedRange.location + selectedRange.length && range.length < selectedRange.length)) { selectedRange.length = selectedRange.length + length - range.length; return selectedRange; } selectedRange.location = range.location + length; selectedRange.length = 0; return selectedRange; } - (NSAttributedString *)_attachmentWithFontSize:(CGFloat)fontSize image:(UIImage *)image shrink:(BOOL)shrink { // CGFloat ascent = YYEmojiGetAscentWithFontSize(fontSize); // CGFloat descent = YYEmojiGetDescentWithFontSize(fontSize); // CGRect bounding = YYEmojiGetGlyphBoundingRectWithFontSize(fontSize); // Heiti SC 字体。。 CGFloat ascent = fontSize * 0.86; CGFloat descent = fontSize * 0.14; CGRect bounding = CGRectMake(0, -0.14 * fontSize, fontSize, fontSize); UIEdgeInsets contentInsets = UIEdgeInsetsMake(ascent - (bounding.size.height + bounding.origin.y), 0, descent + bounding.origin.y, 0); YYTextRunDelegate *delegate = [YYTextRunDelegate new]; delegate.ascent = ascent; delegate.descent = descent; delegate.width = bounding.size.width; YYTextAttachment *attachment = [YYTextAttachment new]; attachment.contentMode = UIViewContentModeScaleAspectFit; attachment.contentInsets = contentInsets; attachment.content = image; if (shrink) { // 缩小~ CGFloat scale = 1 / 10.0; contentInsets.top += fontSize * scale; contentInsets.bottom += fontSize * scale; contentInsets.left += fontSize * scale; contentInsets.right += fontSize * scale; contentInsets = UIEdgeInsetPixelFloor(contentInsets); attachment.contentInsets = contentInsets; } NSMutableAttributedString *atr = [[NSMutableAttributedString alloc] initWithString:YYTextAttachmentToken]; [atr setTextAttachment:attachment range:NSMakeRange(0, atr.length)]; CTRunDelegateRef ctDelegate = delegate.CTRunDelegate; [atr setRunDelegate:ctDelegate range:NSMakeRange(0, atr.length)]; if (ctDelegate) CFRelease(ctDelegate); return atr; } @end