// ======================================================================================================================

//  LinkData.m

// ======================================================================================================================

#import "LinkData.h"

@implementation LinkData

// ============================================================================================================= LinkData

// --------------------------------------------------------------------------------------------------- initWithAnnotation

- (id) initWithAnnotation: (PDFAnnotation *) annotation

{

    // Super.

    [super init];

    // Simple pointer (no retain or release).

    _annotation = annotation;

    return self;

}

// -------------------------------------------------------------------------------------------------------------- dealloc

- (void) dealloc

{

    // Instance vars.

    [_text release];

    // Call super.

    [super dealloc];

}

// ----------------------------------------------------------------------------------------------------------- annotation

- (PDFAnnotation *) annotation

{

    return _annotation;

}

// ----------------------------------------------------------------------------------------------------------------- text

- (NSString *) text

{

    // Evaluate lazily and retain.

    if (_text == NULL)

    {

        NSString        *boundedText;

        // Try to get the string enclosed by the annotation bounds - remove linefeeds and the like.

        boundedText = [[[self selection] string] stringByTrimmingCharactersInSet: [NSCharacterSet controlCharacterSet]];

        // If we got back nothing, then we presume there is no text bounded by the link - other wise return the text.

        if (boundedText == NULL)

            _text = [[NSString stringWithString: @"(no text bounded)"] retain];

        else

            _text = [[NSString stringWithString: boundedText] retain];

    }

    return _text;

}

// ------------------------------------------------------------------------------------------------------------ selection

- (PDFSelection *) selection

{

    // Create a PDFSelection using the link bounds (padded out an arbitrary amount so that text is more likely...

    // to fall within the selection/annotation bounds.

    return [[_annotation page] selectionForRect: NSInsetRect([_annotation bounds], -4.0, -4.0)];

}

// ------------------------------------------------------------------------------------------------------------ selection

- (PDFDestination *) destination

{

    PDFPage         *page;

    NSRect          bounds;

    PDFDestination  *dest = NULL;

    // Somehwat complicated ... we want to represent a point (for the destination) that is above the top-left...

    // corner of the annotation bounds.  If all PDF's were non-rotated this would be trivial.  Though unusual, here...

    // we account for rotations of 90, 180 and 270 as well.

    page = [_annotation page];

    bounds = [_annotation bounds];

    switch ([page rotation])

    {

        case 0:

        dest = [[PDFDestination alloc] initWithPage: page atPoint: NSMakePoint(NSMinX(bounds), NSMaxY(bounds) + 8.0)];

        break;

        case 90:

        dest = [[PDFDestination alloc] initWithPage: page atPoint: NSMakePoint(NSMaxX(bounds) + 8.0, NSMaxY(bounds))];

        break;

        case 180:

        dest = [[PDFDestination alloc] initWithPage: page atPoint: NSMakePoint(NSMaxX(bounds), NSMinY(bounds) - 8.0)];

        break;

        case 270:

        dest = [[PDFDestination alloc] initWithPage: page atPoint: NSMakePoint(NSMinX(bounds) - 8.0, NSMinY(bounds))];

        break;

    }

    return dest;

}

@end