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// NSColor+Scripting.m
// CoverStory
// Copyright 2009 Google Inc.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy
// of the License at
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#import <Cocoa/Cocoa.h>
@interface NSColor(CoverStoryScripting)
@implementation NSColor(CoverStoryScripting)
+ (NSColor *)scriptingRGBColorWithDescriptor:(NSAppleEventDescriptor *)inDesc {
// We're expected to handle everything that can be coerced to
//RGB colors, not just RGB colors.
NSColor *color = nil;
NSAppleEventDescriptor *rgbColorDescriptor
= [inDesc coerceToDescriptorType:typeRGBColor];
if (rgbColorDescriptor) {
// RGBColors contain 16-bit red, green, and blue components.
// Don't trust structures found in Apple event descriptors though.
NSData *descriptorData = [rgbColorDescriptor data];
if ([descriptorData length] == sizeof(RGBColor)) {
const RGBColor *qdColor = (const RGBColor *)[descriptorData bytes];
CGFloat red = ((CGFloat)qdColor->red / 65535.0f);
CGFloat green = ((CGFloat)qdColor->green / 65535.0f);
CGFloat blue = ((CGFloat)qdColor->blue / 65535.0f);
color = [NSColor colorWithCalibratedRed:red
return color;
- (NSAppleEventDescriptor *)scriptingRGBColorDescriptor {
// RGBColors contain 16-bit red, green, and blue components.
NSColor *colorAsCalibratedRGB
= [self colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
RGBColor qdColor;
CGFloat red, green, blue, alpha;
[colorAsCalibratedRGB getRed:&red green:&green blue:&blue alpha:&alpha]; = (unsigned short)(red * 65535.0f); = (unsigned short)(green * 65535.0f); = (unsigned short)(blue * 65535.0f);
return [NSAppleEventDescriptor descriptorWithDescriptorType:typeRGBColor
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