//

//  GGBTextLayer.m

//  GGB-iPhone

//

//  Created by Jens Alfke on 3/10/08.

//  Copyright 2008 __MyCompanyName__. All rights reserved.

//

#import "GGBTextLayer.h"

#import "QuartzUtils.h"

@implementation GGBTextLayer

+ (GGBTextLayer*) textLayerInSuperlayer: (CALayer*)superlayer

                               withText: (NSString*)text

                               fontSize: (float) fontSize

                              alignment: (enum CAAutoresizingMask) align

{

#if TARGET_OS_IPHONE

    UIFont *font = [UIFont systemFontOfSize: fontSize];

#else

    NSFont *font = [NSFont systemFontOfSize: fontSize];

#endif

    return [self textLayerInSuperlayer: superlayer

                              withText: text

                                  font: font

                             alignment: align];

}

+ (GGBTextLayer*) textLayerInSuperlayer: (CALayer*)superlayer

                               withText: (NSString*)text

                                   font: (id)inputFont

                              alignment: (enum CAAutoresizingMask) align

{

    GGBTextLayer *label = [[self alloc] init];

    label.string = text;

#if TARGET_OS_IPHONE

    UIFont *font = inputFont;

    [label setNeedsDisplay];

    label.needsDisplayOnBoundsChange = YES;

#else

    NSFont *font = inputFont;

    label.fontSize = font.pointSize;

#endif

    label.font = font;

    label.foregroundColor = kBlackColor;

    NSString *mode;

    if( align & kCALayerWidthSizable )

        mode = @"center";

    else if( align & kCALayerMinXMargin )

        mode = @"right";

    else

        mode = @"left";

    align |= kCALayerWidthSizable;

    label.alignmentMode = mode;

    // Get the bounds of the interior of the superlayer:

    CGFloat inset = round(font.pointSize/8);

    if( [superlayer respondsToSelector: @selector(borderWidth)] )

        inset += ((GGBLayer*)superlayer).borderWidth;

    CGRect bounds = CGRectInset(superlayer.bounds, inset, inset);

    if( mode==@"center" ) {

        // horizontal centering: ignore x inset:

        bounds = CGRectInset(bounds,-inset,0);

    }

    // Compute y position of bottom of layer's frame. (Remember, descender is negative!)

    CGFloat y = bounds.origin.y;

    CGFloat descender=font.descender, height=font.ascender-descender;

    if( align & kCALayerHeightSizable ) {

        // Vertical centering:

        y += (bounds.size.height-height)/2.0;

#if ! TARGET_OS_IPHONE

        y += descender/2.0;

#endif

        align &= ~kCALayerHeightSizable;

    } else if( align & kCALayerMinYMargin ) {

        // Top alignment (Mac) or bottom (iPhone):

        y += bounds.size.height - height;

    }

    // Compute label's geometry:

    label.bounds = CGRectMake(0, descender,

                              bounds.size.width, height);

    label.anchorPoint = CGPointMake(0,0);

    label.position = CGPointMake(bounds.origin.x,y);

#if ! TARGET_OS_IPHONE

    label.autoresizingMask = align;

#endif

    [superlayer addSublayer: label];

    [label release];

#if 0 // for debugging layout, border the view

    label.borderWidth = 1;

    label.borderColor = kBlackColor;

#endif

    return label;

}

#if TARGET_OS_IPHONE

@synthesize string=_string, font=_font, 

            foregroundColor=_foregroundColor, alignmentMode=_alignmentMode;

- (id) copyWithZone: (NSZone*)zone

{

    GGBTextLayer *clone = [super copyWithZone: zone];

    clone.string = _string;

    clone.font = _font;

    clone.foregroundColor = _foregroundColor;

    clone.alignmentMode = _alignmentMode;

    return clone;

}

- (void)drawInContext:(CGContextRef)ctx

{

    [super drawInContext: ctx];

    if( _string.length > 0 ) {

        CGContextSaveGState(ctx);

        UIGraphicsPushContext(ctx);

        if( _foregroundColor )

            CGContextSetFillColorWithColor(ctx, _foregroundColor);

        UITextAlignment align;

        if( [_alignmentMode isEqualToString: @"center"] )

            align = UITextAlignmentCenter;

        else if( [_alignmentMode isEqualToString: @"right"] )

            align = UITextAlignmentRight;

        else

            align = UITextAlignmentLeft;

        CGRect bounds = self.bounds;

        //float ascender=_font.ascender, descender=_font.descender, leading=_font.leading;

        //bounds.size.height -= ascender-descender - leading;

        [_string drawInRect: bounds 

                   withFont: _font

              lineBreakMode: UILineBreakModeClip

                  alignment: align];

        UIGraphicsPopContext();

        CGContextRestoreGState(ctx);

    }

}

#endif

@end

/*

 .times lt mm: (TimesLTMM)

 times new roman: (TimesNewRomanBoldItalic, TimesNewRomanItalic, TimesNewRoman, TimesNewRomanBold)

 phonepadtwo: (PhonepadTwo)

 hiragino kaku gothic pron w3: (HiraKakuProN-W3)

 helvetica neue: (HelveticaNeueBold, HelveticaNeue)

 trebuchet ms: (TrebuchetMSItalic, TrebuchetMSBoldItalic, TrebuchetMSBold, TrebuchetMS)

 courier new: (CourierNewBoldItalic, CourierNewBold, CourierNewItalic, CourierNew)

 arial unicode ms: (arialuni)

 georgia: (Georgia, GeorgiaBold, GeorgiaBoldItalic, GeorgiaItalic)

 zapfino: (Zapfino)

 arial rounded mt bold: (ArialRoundedMTBold)

 db lcd temp: (DB_LCD_Temp-Black)

 verdana: (Verdana, VerdanaItalic, VerdanaBoldItalic, VerdanaBold)

 american typewriter: (AmericanTypewriterCondensedBold, AmericanTypewriter)

 helvetica: (HelveticaBoldOblique, Helvetica, HelveticaOblique, HelveticaBold)

 lock clock: (LockClock)

 courier: (CourierBoldOblique, CourierOblique)

 hiragino kaku gothic pron w6: (HiraKakuProN-W6)

 arial: (ArialItalic, ArialBold, Arial, ArialBoldItalic)

 .helvetica lt mm: (HelveticaLTMM)

 stheiti: (STHeiti, STXihei)

 applegothic: (AppleGothicRegular)

 marker felt: (MarkerFeltThin)

*/