darling-cocotron/AppKit/NSMeasurementUnit.m

/* Copyright (c) 2006-2007 Christopher J. W. Lloyd <cjwl@objc.net>

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */

#import <AppKit/NSMeasurementUnit.h>
#import <Foundation/NSArray.h>
#import <Foundation/NSString.h>
#import <Foundation/NSValue.h>

static NSMutableArray *_measurementUnits = nil;

@implementation NSMeasurementUnit

+ (NSMeasurementUnit *) inchesMeasurementUnit {
    return [self
            measurementUnitWithName: @"Inches"
                       abbreviation: @"in"
                      pointsPerUnit: 72.0
                        stepUpCycle: [NSArray arrayWithObject:
                                                      [NSNumber numberWithFloat:
                                                                        2.0]]
                      stepDownCycle:
                              [NSArray
                                      arrayWithObjects:
                                              [NSNumber numberWithFloat: 0.5],
                                              [NSNumber numberWithFloat: 0.25],
                                              [NSNumber numberWithFloat: 0.125],
                                              nil]];
}

+ (NSMeasurementUnit *) centimetersMeasurementUnit {
    return [self
            measurementUnitWithName: @"Centimeters"
                       abbreviation: @"cm"
                      pointsPerUnit: 28.35
                        stepUpCycle: [NSArray arrayWithObject:
                                                      [NSNumber numberWithFloat:
                                                                        2.0]]
                      stepDownCycle:
                              [NSArray arrayWithObjects:
                                               [NSNumber numberWithFloat: 0.5],
                                               [NSNumber numberWithFloat: 0.2],
                                               nil]];
}

+ (NSMeasurementUnit *) pointsMeasurementUnit {
    return [self
            measurementUnitWithName: @"Points"
                       abbreviation: @"pt"
                      pointsPerUnit: 1.0
                        stepUpCycle: [NSArray arrayWithObject:
                                                      [NSNumber numberWithFloat:
                                                                        10.0]]
                      stepDownCycle: [NSArray arrayWithObject:
                                                      [NSNumber numberWithFloat:
                                                                        0.5]]];
}

+ (NSMeasurementUnit *) picasMeasurementUnit {
    return [self
            measurementUnitWithName: @"Picas"
                       abbreviation: @"pc"
                      pointsPerUnit: 12.0
                        stepUpCycle: [NSArray arrayWithObject:
                                                      [NSNumber numberWithFloat:
                                                                        10.0]]
                      stepDownCycle: [NSArray arrayWithObject:
                                                      [NSNumber numberWithFloat:
                                                                        0.5]]];
}

+ (NSArray *) allMeasurementUnits {
    return _measurementUnits;
}

+ (NSMeasurementUnit *) measurementUnitNamed: (NSString *) name {
    int i, count = [_measurementUnits count];

    for (i = 0; i < count; ++i)
        if ([[[_measurementUnits objectAtIndex: i] name] isEqualToString: name])
            return [_measurementUnits objectAtIndex: i];

    return nil;
}

+ (void) registerUnit: (NSMeasurementUnit *) unit {
    [_measurementUnits addObject: unit];
}

+ (void) initialize {
    if (_measurementUnits == nil)
        _measurementUnits = [[NSMutableArray alloc] init];

    [self registerUnit: [NSMeasurementUnit inchesMeasurementUnit]];
    [self registerUnit: [NSMeasurementUnit centimetersMeasurementUnit]];
    [self registerUnit: [NSMeasurementUnit pointsMeasurementUnit]];
    [self registerUnit: [NSMeasurementUnit picasMeasurementUnit]];
}

+ (NSMeasurementUnit *) measurementUnitWithName: (NSString *) name
                                   abbreviation: (NSString *) abbreviation
                                  pointsPerUnit: (CGFloat) points
                                    stepUpCycle: (NSArray *) upCycle
                                  stepDownCycle: (NSArray *) downCycle
{
    return [[[self alloc] initWithName: name
                          abbreviation: abbreviation
                         pointsPerUnit: points
                           stepUpCycle: upCycle
                         stepDownCycle: downCycle] autorelease];
}

- (id) initWithName: (NSString *) name
         abbreviation: (NSString *) abbreviation
        pointsPerUnit: (CGFloat) points
          stepUpCycle: (NSArray *) upCycle
        stepDownCycle: (NSArray *) downCycle;
{
    _name = [name retain];
    _abbreviation = [abbreviation retain];
    _pointsPerUnit = points;
    _stepUpCycle = [upCycle retain];
    _stepDownCycle = [downCycle retain];

    return self;
}

- (void) dealloc {
    [_name release];
    [_abbreviation release];
    [_stepUpCycle release];
    [_stepDownCycle release];

    [super dealloc];
}

- (NSString *) name {
    return _name;
}

- (NSString *) abbreviation {
    return _abbreviation;
}

- (CGFloat) pointsPerUnit {
    return _pointsPerUnit;
}

- (NSArray *) stepUpCycle {
    return _stepUpCycle;
}

- (NSArray *) stepDownCycle {
    return _stepDownCycle;
}

@end