CRTransparentSearchFieldCell -- transparent search field cell

CRTransparentSearchFieldCell.h

#import <Cocoa/Cocoa.h>

@interface CRTransparentSearchFieldCell : NSSearchFieldCell {
    BOOL _hasText;
}

@end

CRTransparentSearchFieldCell.m

#import "CRTransparentSearchFieldCell.h"

@implementation CRTransparentSearchFieldCell


- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
    NSRect rect = NSInsetRect(cellFrame, 0.5, 0.5);
    NSBezierPath *path = [NSBezierPath bezierPathWithRoundedRect:rect
                                    xRadius:rect.size.height/2.0
                                    yRadius:rect.size.height/2.0];
    [[NSColor colorWithDeviceWhite:0 alpha:0.4] set];
    [path stroke];

    NSRect searchButtonCellFrame = cellFrame;
    searchButtonCellFrame.size = [[self searchButtonCell] cellSize];
    [[self searchButtonCell] drawWithFrame:searchButtonCellFrame
                                    inView:controlView];

    if (_hasText) {
        NSRect cancelButtonCellFrame = cellFrame;
        cancelButtonCellFrame.origin.x = cellFrame.origin.x +
            cellFrame.size.width - [[self cancelButtonCell] cellSize].width;
        cancelButtonCellFrame.size = [[self cancelButtonCell] cellSize];
        [[self cancelButtonCell] drawWithFrame:cancelButtonCellFrame
                                    inView:controlView];
    }
}

- (void)setStringValue:(NSString *)aString {
    // We need _hasText, instead of querying [self stringValue] when drawing,
    // because querying it will redraw cell, which freezes text cursor.
    _hasText = ![aString isEqualToString:@""];
    [super setStringValue:aString];
}

@end

This doesn't work as intended, see newer version :)