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//
// MGTemplateStandardFilters.m
//
// Created by Matt Gemmell on 13/05/2008.
// Copyright 2008 Instinctive Code. All rights reserved.
//
#import "MGTemplateStandardFilters.h"
#define UPPERCASE @"uppercase"
#define LOWERCASE @"lowercase"
#define CAPITALIZED @"capitalized"
#define DATE_FORMAT @"date_format"
#define COLOR_FORMAT @"color_format"
@implementation MGTemplateStandardFilters
- (NSArray *)filters
{
return [NSArray arrayWithObjects:
UPPERCASE, LOWERCASE, CAPITALIZED,
DATE_FORMAT, COLOR_FORMAT,
nil];
}
- (NSObject *)filterInvoked:(NSString *)filter withArguments:(NSArray *)args onValue:(NSObject *)value
{
if ([filter isEqualToString:UPPERCASE]) {
return [[NSString stringWithFormat:@"%@", value] uppercaseString];
} else if ([filter isEqualToString:LOWERCASE]) {
return [[NSString stringWithFormat:@"%@", value] lowercaseString];
} else if ([filter isEqualToString:CAPITALIZED]) {
return [[NSString stringWithFormat:@"%@", value] capitalizedString];
} else if ([filter isEqualToString:DATE_FORMAT]) {
// Formats NSDates according to Unicode syntax:
// http://unicode.org/reports/tr35/tr35-4.html#Date_Format_Patterns
// e.g. "dd MM yyyy" etc.
if ([value isKindOfClass:[NSDate class]] && [args count] == 1) {
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
NSString *format = [args objectAtIndex:0];
[dateFormatter setDateFormat:format];
return [dateFormatter stringFromDate:(NSDate *)value];
}
} else if ([filter isEqualToString:COLOR_FORMAT]) {
#if TARGET_OS_IPHONE
if ([value isKindOfClass:[UIColor class]] && [args count] == 1) {
#else
if ([value isKindOfClass:[NSColor class]] && [args count] == 1) {
#endif
NSString *format = [[args objectAtIndex:0] lowercaseString];
if ([format isEqualToString:@"hex"]) {
// Output color in hex format RRGGBB (without leading # character).
#if TARGET_OS_IPHONE
CGColorRef color = [(UIColor *)value CGColor];
CGColorSpaceRef colorSpace = CGColorGetColorSpace(color);
CGColorSpaceModel colorSpaceModel = CGColorSpaceGetModel(colorSpace);
if (colorSpaceModel != kCGColorSpaceModelRGB)
return @"000000";
const CGFloat *components = CGColorGetComponents(color);
NSString *colorHex = [NSString stringWithFormat:@"%02x%02x%02x",
(int)(components[0] * 255),
(int)(components[1] * 255),
(int)(components[2] * 255)];
return colorHex;
#else
NSColor *color = [(NSColor *)value colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
if (!color) { // happens if the colorspace couldn't be converted
return @"000000"; // black
} else {
NSString *colorHex = [NSString stringWithFormat:@"%02x%02x%02x",
(int)([color redComponent] * 255),
(int)([color greenComponent] * 255),
(int)([color blueComponent] * 255)];
return colorHex;
}
#endif
}
}
}
return value;
}
@end
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