/*

     File: ImageAndTextCell.m 

 Abstract: Subclass of NSTextFieldCell which can display text and an image simultaneously.

  Version: 1.5 

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 */

#import "ImageAndTextCell.h"

#import "BaseNode.h"

#define kImageOriginXOffset     3

#define kImageOriginYOffset     1

#define kTextOriginXOffset      2

#define kTextOriginYOffset      2

#define kTextHeightAdjust       4

@interface ImageAndTextCell ()

@property (readwrite, strong) NSImage *image;

@end

#pragma mark -

@implementation ImageAndTextCell

// -------------------------------------------------------------------------------

//  init

// -------------------------------------------------------------------------------

- (id)init

{

    self = [super init];

    if (self)

    {

        // we want a smaller font

        [self setFont:[NSFont systemFontOfSize:[NSFont smallSystemFontSize]]];

    }

    return self;

}

// -------------------------------------------------------------------------------

//  copyWithZone:zone

// -------------------------------------------------------------------------------

- (id)copyWithZone:(NSZone *)zone

{

    ImageAndTextCell *cell = (ImageAndTextCell *)[super copyWithZone:zone];

    cell.image = self.image;

    return cell;

}

// -------------------------------------------------------------------------------

//  isGroupCell:

// -------------------------------------------------------------------------------

- (BOOL)isGroupCell

{

    return ([self image] == nil && [[self title] length] > 0);

}

// -------------------------------------------------------------------------------

//  titleRectForBounds:cellRect

//

//  Returns the proper bound for the cell's title while being edited

// -------------------------------------------------------------------------------

- (NSRect)titleRectForBounds:(NSRect)cellRect

{   

    // the cell has an image: draw the normal item cell

    NSSize imageSize;

    NSRect imageFrame;

    imageSize = [self.image size];

    NSDivideRect(cellRect, &imageFrame, &cellRect, 3 + imageSize.width, NSMinXEdge);

    imageFrame.origin.x += kImageOriginXOffset;

    imageFrame.origin.y -= kImageOriginYOffset;

    imageFrame.size = imageSize;

    imageFrame.origin.y += ceil((cellRect.size.height - imageFrame.size.height) / 2);

    NSRect newFrame = cellRect;

    newFrame.origin.x += kTextOriginXOffset;

    newFrame.origin.y += kTextOriginYOffset;

    newFrame.size.height -= kTextHeightAdjust;

    return newFrame;

}

// -------------------------------------------------------------------------------

//  editWithFrame:inView:editor:delegate:event

// -------------------------------------------------------------------------------

- (void)editWithFrame:(NSRect)aRect inView:(NSView*)controlView editor:(NSText*)textObj delegate:(id)anObject event:(NSEvent*)theEvent

{

    NSRect textFrame = [self titleRectForBounds:aRect];

    [super editWithFrame:textFrame inView:controlView editor:textObj delegate:anObject event:theEvent];

}

// -------------------------------------------------------------------------------

//  selectWithFrame:inView:editor:delegate:event:start:length

// -------------------------------------------------------------------------------

- (void)selectWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject start:(NSInteger)selStart length:(NSInteger)selLength

{

    NSRect textFrame = [self titleRectForBounds:aRect];

    [super selectWithFrame:textFrame inView:controlView editor:textObj delegate:anObject start:selStart length:selLength];

}

// -------------------------------------------------------------------------------

//  drawWithFrame:cellFrame:controlView

// -------------------------------------------------------------------------------

- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView

{

    NSRect newCellFrame = cellFrame;

    if (self.image != nil)

    {

        NSSize  imageSize;

        NSRect  imageFrame;

        imageSize = [self.image size];

        NSDivideRect(newCellFrame, &imageFrame, &newCellFrame, imageSize.width, NSMinXEdge);

        if ([self drawsBackground])

        {

            [[self backgroundColor] set];

            NSRectFill(imageFrame);

        }

        imageFrame.origin.y += 1;

        imageFrame.size = imageSize;

        [self.image drawInRect:imageFrame

                      fromRect:NSZeroRect

                     operation:NSCompositeSourceOver

                      fraction:1.0

                respectFlipped:YES

                         hints:nil];

    }

    else

    {

        if ([self isGroupCell])

        {

            // center the text in the cellFrame, and call super to do the work of actually drawing

            CGFloat yOffset = floor((NSHeight(newCellFrame) - [[self attributedStringValue] size].height) / 2.0);

            newCellFrame.origin.y += yOffset;

            newCellFrame.size.height -= (kTextOriginYOffset*yOffset);

        }

    }

    [super drawWithFrame:newCellFrame inView:controlView];

}

// -------------------------------------------------------------------------------

//  cellSize

// -------------------------------------------------------------------------------

- (NSSize)cellSize

{

    NSSize cellSize = [super cellSize];

    cellSize.width += (self.image ? [self.image size].width : 0) + 3;

    return cellSize;

}

@end