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Added method to determine bounding rect of links #61

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Added method to determine bounding rect of links #61

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4 changes: 4 additions & 0 deletions RTLabelProject/Classes/RTLabel.h
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Original file line number Diff line number Diff line change
Expand Up @@ -95,13 +95,17 @@ typedef enum
@property (nonatomic, assign) int currentSelectedButtonComponentIndex;
@property (nonatomic, assign) CFRange visibleRange;
@property (nonatomic, assign) BOOL highlighted;
@property (nonatomic, readonly) NSMutableDictionary *anchorsBoundingRects;

// set text
- (void)setText:(NSString*)text;
+ (RTLabelExtractedComponent*)extractTextStyleFromText:(NSString*)data paragraphReplacement:(NSString*)paragraphReplacement;
// get the visible text
- (NSString*)visibleText;

// get the bounding rect of the anchor referenced by its 'id' attribute (<a href='' id=''>...</a>), relatively to the view
- (CGRect) boundingRectForAnchorWithIdentifier: (NSString *) identifier;

// alternative
// from susieyy http://github.com/susieyy
// The purpose of this code is to cache pre-create the textComponents, is to improve the performance when drawing the text.
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21 changes: 19 additions & 2 deletions RTLabelProject/Classes/RTLabel.m
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Original file line number Diff line number Diff line change
Expand Up @@ -176,6 +176,12 @@ - (void)setLineBreakMode:(RTTextLineBreakMode)lineBreakMode
[self setNeedsDisplay];
}

- (CGRect) boundingRectForAnchorWithIdentifier:(NSString *)identifier
{
NSValue *value = [_anchorsBoundingRects objectForKey:identifier];
return value? value.CGRectValue : CGRectZero;
}

- (void)drawRect:(CGRect)rect
{
[self render];
Expand Down Expand Up @@ -280,6 +286,12 @@ - (void)render
value = [value stringByReplacingOccurrencesOfString:@"'" withString:@""];
[component.attributes setObject:value forKey:@"href"];

value = [component.attributes objectForKey:@"id"];
if (value) {
value = [value stringByReplacingOccurrencesOfString:@"'" withString:@""];
[component.attributes setObject:value forKey:@"id"];
}

[links addObject:component];
}
else if ([component.tagLabel caseInsensitiveCompare:@"u"] == NSOrderedSame || [component.tagLabel caseInsensitiveCompare:@"uu"] == NSOrderedSame)
Expand Down Expand Up @@ -335,7 +347,8 @@ - (void)render
if (self.currentSelectedButtonComponentIndex==-1)
{
// only check for linkable items the first time, not when it's being redrawn on button pressed

_anchorsBoundingRects = @{}.mutableCopy;

for (RTLabelComponent *linkableComponents in links)
{
float height = 0.0;
Expand All @@ -360,8 +373,12 @@ - (void)render

CGFloat button_width = primaryOffset2 - primaryOffset;

RTLabelButton *button = [[RTLabelButton alloc] initWithFrame:CGRectMake(primaryOffset+origin.x, height, button_width, ascent+descent)];
CGRect buttonFrame = CGRectMake(primaryOffset+origin.x, height, button_width, ascent+descent);
RTLabelButton *button = [[RTLabelButton alloc] initWithFrame:buttonFrame];

if ([linkableComponents.attributes objectForKey:@"id"])
_anchorsBoundingRects[[linkableComponents.attributes objectForKey:@"id"]] = [NSValue valueWithCGRect:buttonFrame];

[button setBackgroundColor:[UIColor colorWithWhite:0 alpha:0]];
[button setComponentIndex:linkableComponents.componentIndex];

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