Perform action checking

KILabel/Source/KILabel.m

@@ -29,12 +29,80 @@
 NSString * const KILabelRangeKey = @"range";
 NSString * const KILabelLinkKey = @"link";
 
+@interface KILayoutManager : NSLayoutManager
+@end
+@implementation KILayoutManager
+- (void)fillBackgroundRectArray:(const CGRect *)rectArray count:(NSUInteger)rectCount forCharacterRange:(NSRange)charRange color:(UIColor *)color
+{
+    CGFloat halfLineWidth = 4.; // change this to change corners radius
+    CGFloat marginX = 1.5f; // change this to adjust x margin
+
+    CGMutablePathRef path = CGPathCreateMutable();
+
+    CGRect rect0 = rectArray[0];
+    rect0.origin.x -= marginX;
+    rect0.size.width += marginX * 2;
+
+    if (rectCount == 1 ||
+        (rectCount == 2 && (CGRectGetMaxX(rectArray[1]) < CGRectGetMinX(rectArray[0])))
+        )
+    {
+        // 1 rect or 2 rects without edges in contact
+        CGPathAddRect(path, NULL, CGRectInset(rect0, halfLineWidth, halfLineWidth));
+        if (rectCount == 2) {
+            CGRect rect1 = rectArray[1];
+            rect1.origin.x -= marginX;
+            rect1.size.width += marginX * 2;
+            CGPathAddRect(path, NULL, CGRectInset(rect1, halfLineWidth, halfLineWidth));
+        }
+    }
+    else
+    {
+        // 2 or 3 rects
+        NSUInteger lastRect = rectCount - 1;
+        CGRect rectLast = rectArray[lastRect];
+        rectLast.origin.x -= marginX / 2;
+        rectLast.size.width += marginX;
+
+        CGPathMoveToPoint(path, NULL, CGRectGetMinX(rect0) + halfLineWidth, CGRectGetMaxY(rect0) + halfLineWidth);
+
+        CGPathAddLineToPoint(path, NULL, CGRectGetMinX(rect0) + halfLineWidth, CGRectGetMinY(rect0) + halfLineWidth);
+        CGPathAddLineToPoint(path, NULL, CGRectGetMaxX(rect0) - halfLineWidth, CGRectGetMinY(rect0) + halfLineWidth);
+
+        CGPathAddLineToPoint(path, NULL, CGRectGetMaxX(rect0) - halfLineWidth, CGRectGetMinY(rectLast) - halfLineWidth);
+        CGPathAddLineToPoint(path, NULL, CGRectGetMaxX(rectLast) - halfLineWidth, CGRectGetMinY(rectLast) - halfLineWidth);
+
+        CGPathAddLineToPoint(path, NULL, CGRectGetMaxX(rectLast) - halfLineWidth, CGRectGetMaxY(rectLast) - halfLineWidth);
+        CGPathAddLineToPoint(path, NULL, CGRectGetMinX(rectLast) + halfLineWidth, CGRectGetMaxY(rectLast) - halfLineWidth);
+
+        CGPathAddLineToPoint(path, NULL, CGRectGetMinX(rectLast) + halfLineWidth, CGRectGetMaxY(rect0) + halfLineWidth);
+
+        CGPathCloseSubpath(path);
+    }
+
+    [color set]; // set fill and stroke color
+
+    CGContextRef ctx = UIGraphicsGetCurrentContext();
+    CGContextSetLineWidth(ctx, halfLineWidth * 2.);
+    CGContextSetLineJoin(ctx, kCGLineJoinRound);
+
+    CGContextSetAllowsAntialiasing(ctx, YES);
+    CGContextSetShouldAntialias(ctx, YES);
+
+    CGContextAddPath(ctx, path);
+    CGPathRelease(path);
+
+    CGContextDrawPath(ctx, kCGPathFillStroke);
+}
+
+@end
+
 #pragma mark - Private Interface
 
 @interface KILabel()
 
 // Used to control layout of glyphs and rendering
-@property (nonatomic, retain) NSLayoutManager *layoutManager;
+@property (nonatomic, retain) KILayoutManager *layoutManager;
 
 // Specifies the space in which to render text
 @property (nonatomic, retain) NSTextContainer *textContainer;
@@ -58,6 +126,7 @@ @interface KILabel()
 @implementation KILabel
 {
     NSMutableDictionary *_linkTypeAttributes;
+    CGPoint touchBeganLocation;
 }
 
 #pragma mark - Construction
@@ -95,7 +164,7 @@ - (void)setupTextSystem
     _textContainer.size = self.frame.size;
 
     // Create a layout manager for rendering
-    _layoutManager = [[NSLayoutManager alloc] init];
+    _layoutManager = [[KILayoutManager alloc] init];
     _layoutManager.delegate = self;
     [_layoutManager addTextContainer:_textContainer];
 
@@ -220,7 +289,9 @@ - (void)setText:(NSString *)text
     {
         text = @"";
     }
-
+    if (@available(iOS 12.0, *)) {
+        [self invalidateIntrinsicContentSize];
+    }
     NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text attributes:[self attributesFromProperties]];
     [self updateTextStoreWithAttributedString:attributedText];
 }
@@ -229,7 +300,9 @@ - (void)setAttributedText:(NSAttributedString *)attributedText
 {
     // Pass the text to the super class first
     [super setAttributedText:attributedText];
-
+    if (@available(iOS 12.0, *)) {
+        [self invalidateIntrinsicContentSize];
+    }
     [self updateTextStoreWithAttributedString:attributedText];
 }
 
@@ -309,12 +382,25 @@ - (void)updateTextStoreWithAttributedString:(NSAttributedString *)attributedStri
     if (_textStorage)
     {
         // Set the string on the storage
-        [_textStorage setAttributedString:attributedString];
+        // setAttributedString: requires a non-null argument
+        if (attributedString) {
+            [_textStorage setAttributedString:attributedString];
+        }
+        else {
+            [_textStorage setAttributedString: [NSAttributedString new]];
+        }
+
     }
     else
     {
         // Create a new text storage and attach it correctly to the layout manager
-        _textStorage = [[NSTextStorage alloc] initWithAttributedString:attributedString];
+        // setAttributedString: requires a non-null argument
+        if (attributedString) {
+            _textStorage = [[NSTextStorage alloc] initWithAttributedString: attributedString];
+        }
+        else {
+            _textStorage = [[NSTextStorage alloc] initWithAttributedString: [NSAttributedString new]];
+        }
         [_textStorage addLayoutManager:_layoutManager];
         [_layoutManager setTextStorage:_textStorage];
     }
@@ -541,6 +627,7 @@ - (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)num
     _textContainer.maximumNumberOfLines = numberOfLines;
 
     // Measure the text with the new state
+    [_layoutManager glyphRangeForTextContainer:_textContainer]; // Force layout text as suggested by Apple document
     CGRect textBounds = [_layoutManager usedRectForTextContainer:_textContainer];
 
     // Position the bounds and round up the size for good measure
@@ -554,6 +641,10 @@ - (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)num
         CGFloat offsetY = (bounds.size.height - textBounds.size.height) / 2.0;
         textBounds.origin.y += offsetY;
     }
+
+    if (_layoutManager.textStorage.length == 0) {
+        textBounds.size.height = 0.0f;
+    }
 
     // Restore the old container state before we exit under any circumstances
     _textContainer.size = savedTextContainerSize;
@@ -569,7 +660,7 @@ - (void)drawTextInRect:(CGRect)rect
     // [super drawTextInRect:rect];
 
     // Calculate the offset of the text in the view
-    NSRange glyphRange = [_layoutManager glyphRangeForTextContainer:_textContainer];
+    NSRange glyphRange = [_layoutManager glyphRangeForTextContainer:_textContainer];  // Force layout text as suggested by Apple document
     CGPoint glyphsPosition = [self calcGlyphsPositionInView];
 
     // Drawing code
@@ -607,6 +698,11 @@ - (void)setBounds:(CGRect)bounds
     [super setBounds:bounds];
 
     _textContainer.size = self.bounds.size;
+
+    if (self.numberOfLines == 0 && bounds.size.width != self.preferredMaxLayoutWidth) {
+        self.preferredMaxLayoutWidth = self.bounds.size.width;
+        [self setNeedsUpdateConstraints];
+    }
 }
 
 - (void)layoutSubviews
@@ -636,8 +732,8 @@ - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
 
     // Get the info for the touched link if there is one
     NSDictionary *touchedLink;
-    CGPoint touchLocation = [[touches anyObject] locationInView:self];
-    touchedLink = [self linkAtPoint:touchLocation];
+    touchBeganLocation = [[touches anyObject] locationInView:self];
+    touchedLink = [self linkAtPoint:touchBeganLocation];
 
     if (touchedLink)
     {
@@ -653,7 +749,11 @@ - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
 {
     [super touchesMoved:touches withEvent:event];
 
-    _isTouchMoved = YES;
+    CGPoint touchLocation = [[touches anyObject] locationInView:self];
+    if (fabs(touchLocation.x - touchBeganLocation.x) > 1.0f &&
+        fabs(touchLocation.y - touchBeganLocation.y) > 1.0f) {
+        _isTouchMoved = YES;
+    }
 }
 
 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
@@ -681,10 +781,10 @@ - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
 
         [self receivedActionForLinkType:linkType string:touchedSubstring range:range];
     }
-    else
-    {
-        [super touchesBegan:touches withEvent:event];
-    }
+//    else
+//    {
+//        [super touchesBegan:touches withEvent:event];
+//    }
 
     self.selectedRange = NSMakeRange(0, 0);
 }
@@ -764,4 +864,21 @@ + (NSAttributedString *)sanitizeAttributedString:(NSAttributedString *)attribute
     return restyled;
 }
 
+#pragma mark - Menu items
+
+- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
+    if (action == @selector(printToConsole) || action == @selector(copy:)) {
+        return YES;
+    }
+    else {
+        return NO;
+    }
+}
+
+- (void)printToConsole {
+
+}
+
+
+
 @end