Alternate display mode for multi-column text

Classes/Views/AKOMultiColumnTextView.h

@@ -16,7 +16,9 @@
     NSInteger _columnCount;
     UIFont *_font;
     NSString *_text;
+    NSArray *_texts;
     NSMutableAttributedString *_attributedString;
+    NSMutableArray *_attributedStrings;
     UIColor *_color;
     CFMutableArrayRef _columnPaths;
     CFMutableArrayRef _frames;
@@ -39,6 +41,7 @@
 @property (nonatomic) NSInteger columnCount;
 @property (nonatomic, retain) UIFont *font;
 @property (nonatomic, copy) NSString *text;
+@property (nonatomic, copy) NSArray *texts;
 @property (nonatomic, retain) UIColor *color;
 @property (nonatomic) CFIndex startIndex;
 @property (nonatomic, readonly) CFIndex finalIndex;

Classes/Views/AKOMultiColumnTextView.m

@@ -1,4 +1,5 @@
 
+
 //  AKOMultiColumnTextView.m
 //  CoreTextWrapper
 //
@@ -13,7 +14,7 @@ @interface AKOMultiColumnTextView ()
 
 @property (nonatomic, retain) NSMutableAttributedString *attributedString;
 
-- (void)updateAttributedString;
+- (NSMutableAttributedString *)newAttributedStringWithString:(NSString *)aString;
 - (void)updateFrames;
 - (void)setup;
 - (void)createColumns;
@@ -26,6 +27,7 @@ @implementation AKOMultiColumnTextView
 @dynamic font;
 @dynamic columnCount;
 @dynamic text;
+@dynamic texts;
 @dynamic color;
 @synthesize startIndex = _startIndex;
 @synthesize finalIndex = _finalIndex;
@@ -47,6 +49,7 @@ @implementation AKOMultiColumnTextView
 
 - (void)setup
 {
+    _attributedStrings = [[NSMutableArray alloc] init];
     self.backgroundColor = [UIColor whiteColor];
     _columnCount = 3;
     _text = [@"" copy];
@@ -101,6 +104,8 @@ - (void)dealloc
     self.dataSource = nil;
     self.attributedString = nil;
 
+    [_attributedStrings release];
+    _attributedStrings = nil;
     [_text release];
     _text = nil;
     [_font release];
@@ -147,6 +152,11 @@ - (NSString *)text
     return _text;
 }
 
+- (NSArray *)texts
+{
+    return _texts;
+}
+
 - (void)setDataSource:(id<AKOMultiColumnTextViewDataSource>)dataSource
 {
     if (![_dataSource isEqual:dataSource])
@@ -173,6 +183,20 @@ - (void)setText:(NSString *)newText
     }
 }
 
+- (void)setTexts:(NSArray *)newTexts {
+    if (![_texts isEqual:newTexts]) {
+        [_text release];
+        _text = nil;
+
+        [_texts release];
+        _texts = [newTexts copy];
+
+        self.attributedString = nil;
+        [self updateFrames];
+        [self setNeedsDisplay];
+    }
+}
+
 - (NSInteger)columnCount
 {
     return _columnCount;
@@ -322,25 +346,26 @@ - (void)createColumns
 
 }
 
-- (void)updateAttributedString
+- (NSMutableAttributedString *)newAttributedStringWithString:(NSString *)aString
 {
-    if (self.text != nil)
+    NSMutableAttributedString *attr_string = nil;
+    if (aString != nil)
     {
-        self.attributedString = [[[NSMutableAttributedString alloc] initWithString:self.text] autorelease];
-        NSRange range = NSMakeRange(0, [self.text length]);
+        attr_string = [[NSMutableAttributedString alloc] initWithString:aString];
+        NSRange range = NSMakeRange(0, [aString length]);
 
         if (self.font != nil)
         {
             CTFontRef font = self.font.CTFont;
-            [self.attributedString addAttribute:(NSString *)kCTFontAttributeName
+            [attr_string addAttribute:(NSString *)kCTFontAttributeName
                                           value:(id)font
                                           range:range];
             CFRelease(font);
         }
 
         if (self.color != nil)
         {
-            [self.attributedString addAttribute:(NSString *)kCTForegroundColorAttributeName 
+            [attr_string addAttribute:(NSString *)kCTForegroundColorAttributeName 
                                           value:(id)self.color.CGColor
                                           range:range];
         }
@@ -358,19 +383,20 @@ - (void)updateAttributedString
         };
 
         CTParagraphStyleRef paragraphStyle = CTParagraphStyleCreate(theSettings, theNumberOfSettings);
-        [self.attributedString addAttribute:(NSString *)kCTParagraphStyleAttributeName 
+        [attr_string addAttribute:(NSString *)kCTParagraphStyleAttributeName 
                                       value:(id)paragraphStyle
                                       range:range];
 
         CFRelease(paragraphStyle);
     }
+    return attr_string;
 }
 
 - (void)updateFrames
 {
     if (self.text != nil)
     {
-        [self updateAttributedString];
+        _attributedString = [self newAttributedStringWithString:self.text];
         CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)self.attributedString);
         [self createColumns];
 
@@ -399,6 +425,38 @@ - (void)updateFrames
         _moreTextAvailable = [self.text length] > self.finalIndex;
         CFRelease(framesetter);
     }
+    else if (self.texts != nil) {
+        [_attributedStrings removeAllObjects];
+        for (int column = 0; column < _columnCount; column++) {
+            if (column < [_texts count]) {
+                NSString *currentText = [_texts objectAtIndex:column];
+                [_attributedStrings addObject:[[self newAttributedStringWithString:currentText] autorelease]];
+            }
+        }
+        [self createColumns];
+        CFIndex pathCount = CFArrayGetCount(_columnPaths);
+
+        if (_frames != NULL)
+        {
+            CFRelease(_frames);
+        }
+        _frames = CFArrayCreateMutable(kCFAllocatorDefault, pathCount, &kCFTypeArrayCallBacks);
+
+        for (int column = 0; column < pathCount; column++)
+        {
+            CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)[_attributedStrings objectAtIndex:column]);
+
+            CGPathRef path = (CGPathRef)CFArrayGetValueAtIndex(_columnPaths, column);
+
+            CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), path, NULL);
+            CFArrayInsertValueAtIndex(_frames, column, frame);
+
+            CFRelease(frame);
+            CFRelease(framesetter);
+        }
+
+        _moreTextAvailable = NO;
+    }
 }
 
 - (void)setPage:(NSInteger)page