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Add method to convert HTML to plain text suitable for copying to text-based apps. It could be much improved, but it’s better than nothing for right now.

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This commit is contained in:
Brent Simmons 2017-12-26 16:17:57 -08:00
parent 9ec6188395
commit a8bd15e9b4
2 changed files with 44 additions and 0 deletions
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1
Frameworks/RSCore/RSCore/NSString+RSCore.h
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@ -59,6 +59,7 @@ typedef struct {
- (NSString *)rs_stringByStrippingSuffix:(NSString *)suffix caseSensitive:(BOOL)caseSensitive;
- (NSString *)rs_stringByStrippingHTML:(NSUInteger)maxCharacters;
- (NSString *)rs_stringByConvertingToPlainText;
/*Filename from path, file URL string, or external URL string.*/

43
Frameworks/RSCore/RSCore/NSString+RSCore.m
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@ -301,6 +301,49 @@ NSString *RSStringReplaceAll(NSString *stringToSearch, NSString *searchFor, NSSt
return (__bridge_transfer NSString *)s;
}
- (NSString *)rs_stringByConvertingToPlainText {
if (![self containsString:@"<"]) {
return self;
}
NSMutableString *preflightedCopy = [self mutableCopy];
[preflightedCopy replaceOccurrencesOfString:@"<blockquote>" withString:@"\n\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"</blockquote>" withString:@"\n\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"<p>" withString:@"\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"</p>" withString:@"\n\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"<div>" withString:@"\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"</div>" withString:@"\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"<br>" withString:@"\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"<br />" withString:@"\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"<br/>" withString:@"\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
[preflightedCopy replaceOccurrencesOfString:@"</li>" withString:@"\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, preflightedCopy.length)];
CFMutableStringRef s = CFStringCreateMutable(kCFAllocatorDefault, (CFIndex)preflightedCopy.length);
NSUInteger level = 0;
for (NSUInteger i = 0; i < preflightedCopy.length; i++) {
unichar ch = [preflightedCopy characterAtIndex:i];
if (ch == '<') {
level++;
}
else if (ch == '>') {
level--;
}
else if (level == 0) {
CFStringAppendCharacters(s, &ch, 1);
}
}
NSMutableString *plainTextString = [(__bridge_transfer NSString *)s mutableCopy];
while ([plainTextString rangeOfString:@"\n\n\n"].location != NSNotFound) {
[plainTextString replaceOccurrencesOfString:@"\n\n\n" withString:@"\n\n" options:NSLiteralSearch range:NSMakeRange(0, plainTextString.length)];
}
return plainTextString;
}
- (NSString *)rs_filename {