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Improved word search/replacement logic #10

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6 changes: 5 additions & 1 deletion ZIMInputToolbar/Classes/ZIMExpandingTextView.h
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,10 @@ typedef NS_ENUM(int16_t, ZIMExpandingTextViewVerticalAlign) {
- (BOOL) hasText;
- (void) scrollRangeToVisible:(NSRange)range;
- (void) clearText;
- (void) replaceString:(NSString *)str withObjectFromString:(NSString *)stringToConvert;
- (void) replaceString:(NSString *)str inRange:(NSRange)range withObjectFromString:(NSString *)stringToConvert;
- (NSString *) getLastEnteredWord;
- (void) addReplacementString:(NSString *)rString toReplaceString:(NSString *)sString;
- (void) removeAllReplacementStrings;
- (void) replaceLastEnteredWordWithUserName:(NSString *)userName andUserId:(NSString *)userId;

@end
71 changes: 57 additions & 14 deletions ZIMInputToolbar/Classes/ZIMExpandingTextView.m
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,8 @@ - (CGRect)attachmentBoundsForTextContainer:(NSTextContainer *)textContainer prop

@interface ZIMExpandingTextView()

@property (strong, nonatomic) NSMutableDictionary *replacementStringsDictionary;
@property (strong, nonatomic) UITextRange *lastEnteredWordRange;
@end

@implementation ZIMExpandingTextView
Expand Down Expand Up @@ -90,6 +92,7 @@ - (id)initWithFrame:(CGRect)frame
self.textViewBackgroundImage = [[UIImageView alloc] initWithFrame:backgroundFrame];
self.internalTextView = [[UITextView alloc] initWithFrame:self.textViewBackgroundImage.bounds];
self.placeholderLabel = [[UILabel alloc] initWithFrame: textViewFrame];
self.replacementStringsDictionary = [[NSMutableDictionary alloc] init];

/* Custom Background image */
UIImage *textViewBackgroundImage = nil;
Expand Down Expand Up @@ -487,33 +490,59 @@ - (BOOL) resignFirstResponder {
-(void) setText:(NSString *)atext {
if (atext) {
self.internalTextView.attributedText = [[NSAttributedString alloc] initWithString:atext];
if(atext.length > 0) {
for (NSString *keyString in self.replacementStringsDictionary.allKeys) {
[self replaceString:keyString withObjectFromString:self.replacementStringsDictionary[keyString]];
}
}
[self performSelector:@selector(textViewDidChange:) withObject:self.internalTextView];
}
}

- (void) replaceString:(NSString *)str withObjectFromString:(NSString *)stringToConvert {
NSMutableAttributedString *attrText = [[NSMutableAttributedString alloc] initWithAttributedString:self.internalTextView.attributedText];
NSRange range = [self.internalTextView.attributedText.string rangeOfString:str options: NSBackwardsSearch];
[[attrText mutableString] replaceOccurrencesOfString:str withString:@"" options:NSCaseInsensitiveSearch range:range];
UIImage *image = [self imageFromString:stringToConvert];
InlineTextAttachment *attch = [[InlineTextAttachment alloc] initWithData:nil ofType:nil];
UIFont *font = self.internalTextView.font;
attch.fontDescender = font.descender;
attch.image = image;
attch.realText = [@"@" stringByAppendingString:stringToConvert];
NSAttributedString *attachmentString = [NSAttributedString attributedStringWithAttachment:attch];
[attrText appendAttributedString:attachmentString];
self.internalTextView.attributedText = [attrText copy];
[self performSelector:@selector(textViewDidChange:) withObject:self.internalTextView];
while (range.location != NSNotFound) { //if the text filled from mesageDraft - the whole text should be analyzed for replacements, not only the last word
NSMutableAttributedString *aTextMutableString = [self.internalTextView.attributedText mutableCopy];

UIImage *image = [self imageFromString:stringToConvert];
InlineTextAttachment *attch = [[InlineTextAttachment alloc] initWithData:nil ofType:nil];
UIFont *font = self.internalTextView.font;
attch.fontDescender = font.descender;
attch.image = image;
attch.realText = str;
NSAttributedString *attachmentString = [NSAttributedString attributedStringWithAttachment:attch];

[aTextMutableString replaceCharactersInRange:[self.internalTextView.attributedText.string rangeOfString:str options: nil] withAttributedString:attachmentString];
self.internalTextView.attributedText = [aTextMutableString copy];
range = [self.internalTextView.attributedText.string rangeOfString:str options: nil];
[self performSelector:@selector(textViewDidChange:) withObject:self.internalTextView];
}
}

- (NSString *)getLastEnteredWord
{
NSRange cursorPosition = [self.internalTextView selectedRange];
NSMutableCharacterSet *workingSet = [[NSCharacterSet whitespaceAndNewlineCharacterSet] mutableCopy];
NSString *internalText = self.internalTextView.attributedText.string;
NSRange newRange = [self.internalTextView.attributedText.string rangeOfCharacterFromSet:workingSet
options:NSBackwardsSearch
range:NSMakeRange(0, cursorPosition.location)];
//The below code could probably be done in a better way
UITextPosition *beginning = self.internalTextView.beginningOfDocument;
UITextPosition *start = [self.internalTextView positionFromPosition:beginning offset:cursorPosition.location];
UITextPosition *end = [self.internalTextView positionFromPosition:beginning offset:newRange.location+1];
self.lastEnteredWordRange = [self.internalTextView textRangeFromPosition:end toPosition:start];

NSString* lastWord = [self.internalTextView textInRange:self.lastEnteredWordRange];
return lastWord;
}

- (UIImage *)imageFromString:(NSString *)string
{
NSDictionary *attrDict = [NSDictionary dictionaryWithObject:[UIFont boldSystemFontOfSize:12.0f] forKey:NSFontAttributeName];
CGSize size = [string sizeWithAttributes:attrDict];
// Create a bitmap context into which the text will be rendered.
UIGraphicsBeginImageContext(size);
// Render the text
UIGraphicsBeginImageContextWithOptions(size, NO, 2.0);
[string drawAtPoint:CGPointMake(0.0, 0.0) withAttributes:attrDict];
UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
Expand Down Expand Up @@ -541,6 +570,20 @@ - (NSString *) text {
return attrString.string;
}

- (void) replaceLastEnteredWordWithUserName:(NSString *)userName andUserId:(NSString *)userId{
[self.internalTextView replaceRange:self.lastEnteredWordRange withText:userId];
[self addReplacementString:userId toReplaceString:userName];
[self replaceString:userId withObjectFromString:userName];
}

- (void) addReplacementString:(NSString *)value toReplaceString:(NSString *)key {
[self.replacementStringsDictionary setObject:value forKey:key];
}

- (void) removeAllReplacementStrings {
[self.replacementStringsDictionary removeAllObjects];
}

- (void) substringToRange:(NSRange)range {
self.internalTextView.attributedText = [self.internalTextView.attributedText attributedSubstringFromRange:NSMakeRange(0, range.location)];
}
Expand Down