SSYTokenFieldCell.m

#import "SSYTokenFieldCell.h"
#import "NS(Attributed)String+Geometrics.h"

@implementation SSYTokenFieldCell

+ (void)initialize {
	[self exposeBinding:@"tokenizingCharacter"] ;
}

- (void)setObjectValue:(id)value {
	if ([value isKindOfClass:[NSSet class]]) {
		// Convert to an NSArray, as required by super
		value = [value allObjects] ;
        
        /*
         The following line was added in BookMacster 1.12.7, to alphabetize
         tags in Tags Popover and Inspector.  However, it also
         cast 'value' to an NSCountedSet and re-invoked -allObjects on it.
         This *worked* in macOS 10.7 and later, because, strangely, NSArray
         *does* respond to -allObjects in these systems, returns a copy of self.
         But not in 10.6, where an exception could be raised here
         The troublesome cast and -allObjects were removed in 
         BookMacster 1.19.2.
         */
		value = [value sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)] ;
	}

	[super setObjectValue:value] ;
}

/*!
 @brief    Calculates the expansion frame which is used to display the
 entire text in a special expansion frame tool tip, if text is truncated.
 
 @details  This is a workaround for the fact that -[NSTableColumn dataCell],
 even though it claims to be an NSTextFieldCell, must have some magic built
 into it which allows the expansion frame tool tip to be calculated
 correctly regardless of -wraps, -isScrollable, and -truncatesLastVisibleLine.
 The [[NSTextFieldCell alloc] init] used to draw the text in this class
 does not have that magic, so we calculate it from scratch, based on the
 current attributed string value.
 */
- (NSRect)expansionFrameWithFrame:(NSRect)frame
						   inView:(NSView*)view {
	NSRect expansionFrame = [super expansionFrameWithFrame:frame
													inView:view] ;
	// Since we are not using a magic NSTextFieldCell, the
	// expansionFrame at this point will be no wider than the
	// cell, and will be high enough to display the text if
	// it were wrapped to multiple lines, which it does not.
    // (You can get the correct rect if you setWraps:NO, but
    // then the ellipsis does not show when drawing normally.)
	// So we discard the size and use only the origin.

	// Super does correctly return NSZeroRect if the text
	// is not currently truncated, so we use that and do same.
	if (
		(expansionFrame.size.width == 0.0)
		&&
		(expansionFrame.size.height == 0.0)
		) {
		return NSZeroRect ;
	}
	
	NSAttributedString* as = [self attributedStringValue] ;
	CGFloat height = frame.size.height ;
	CGFloat width = [as widthForHeight:height] ;
	expansionFrame.size.width = width ;
	expansionFrame.size.height = height ;
	return expansionFrame ;
}

@synthesize tokenizingCharacter = m_tokenizingCharacter ;

- (unichar)tokenizingCharacter {
	unichar tokenizingCharacter ;
	@synchronized(self) {
		tokenizingCharacter = m_tokenizingCharacter ;
	}
	return tokenizingCharacter ;
}

- (void)setTokenizingCharacter:(unichar)tokenizingCharacter {
	// NSTokenFieldCell raises an exception if you set tokenizing
	// character set to {0}.  I've seen this happen in BookMacster
	// when a document is closing.  I'm not sure if it's due to
	// some other bug, but as defensive programming…
	if (tokenizingCharacter == 0) {
		return ;
	}
	
	@synchronized(self) {
		m_tokenizingCharacter = tokenizingCharacter ;
	}

	[self setTokenizingCharacterSet:[NSCharacterSet characterSetWithRange:NSMakeRange(tokenizingCharacter, 1)]] ;
	
}


@end