The document discusses the history of Ruby on Mac OS X and Apple's goals to make Ruby a first-class language for Cocoa development. It introduces MacRuby as a solution to issues with RubyCocoa, and describes how HotCocoa builds on MacRuby to provide an idiomatic Ruby API for Cocoa. It concludes with an overview of the current state of MacRuby development.

1. MacRuby + HotCocoa
by rICH kILMER
Golden Gate Ruby Conf

2. A History of Apple and Ruby
MacRuby
2002 2003 2004 2005 2006 2007 2008 2009
OS X 10.5 OS X 10.x
OS X 10.2 OS X 10.4
Ruby 1.8.6 Ruby 1.8.7
Ruby 1.6.7 Ruby 1.8.2
RubyGems RubyGems
RubyCocoa RubyCocoa
Rails Rails 2.2

3. Apple’s Goals:
Make Mac OS X the best
platform for Ruby developers

4. Apple’s Goals:
t
s
e
b
e
h class
t
Make Ruby a first
Cocoa programming language
on Mac OS X

5. Mac OS X Stack
User Experience
Application Frameworks
Graphics and Media
Darwin

6. Mac OS X Stack - Languages
User Experience Objective-C
Application Frameworks
Graphics and Media
Darwin C

7. Bridging Ruby & Objective-C
RubyCocoa
by
by FUJIMOTO Hisakuni (2001)
Bundled with Mac OS X 10.5 (stable)

8. RubyCocoa Hello World
require 'osx/cocoa'; include OSX
app = NSApplication.sharedApplication
win = NSWindow.alloc.initWithContentRect_styleMask_backing_defer(
[0, 0, 200, 60],
NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask,
NSBackingStoreBuffered,
false)
win.title = 'Hello World'
button = NSButton.alloc.initWithFrame(NSZeroRect)
win.contentView.addSubview(button)
button.bezelStyle = NSRoundedBezelStyle
button.title = 'Hello!'
button.sizeToFit
button.frameOrigin = NSMakePoint((win.contentView.frameSize.width / 2.0) - (button.frameSize.width / 2.0),
(win.contentView.frameSize.height / 2.0) - (button.frameSize.height / 2.0))
button_controller = Object.new
def button_controller.sayHello(sender)
puts quot;Hello World!quot;
end
button.target = button_controller
button.action = 'sayHello:'
win.display
win.orderFrontRegardless
app.run

9. Problems with RubyCocoa:
It’s a bridge
Messaging syntax is different
Ruby uses green threads
Two runtimes, two GCs

10. Enter MacRuby
MacRuby 0.4
Objective-C 2.0 Ruby 1.9
Core Garbage Standard
Runtime YARV Parser
Foundation Collector Library
Garbage Built-ins
Collector
Every Ruby class is an Objective-C class
Every Ruby object is an Objective-C object
Every Ruby method is an Objective-C method

11. MacRuby Hello World
framework ‘Cocoa’
app = NSApplication.sharedApplication
win = NSWindow.alloc.initWithContentRect([0, 0, 200, 60],
styleMask:NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask,
backing:NSBackingStoreBuffered,
defer:false)
win.title = 'Hello World'
button = NSButton.alloc.initWithFrame(NSZeroRect)
win.contentView.addSubview(button)
button.bezelStyle = NSRoundedBezelStyle
button.title = 'Hello!'
button.sizeToFit
button.frameOrigin = NSMakePoint((win.contentView.frameSize.width / 2.0) - (button.frameSize.width / 2.0),
(win.contentView.frameSize.height / 2.0) - (button.frameSize.height / 2.0))
button_controller = Object.new
def button_controller.sayHello(sender)
puts quot;Hello World!quot;
end
button.target = button_controller
button.action = 'sayHello:'
win.display
win.orderFrontRegardless
app.run

12. Enter HotCocoa
HotCocoa is an idiomatic
Ruby API that simplifies the
configuration and wiring
together of ObjC/Cocoa classes

13. MacRuby Hello World
framework ‘Cocoa’
app = NSApplication.sharedApplication
win = NSWindow.alloc.initWithContentRect([0, 0, 200, 60],
styleMask:NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask,
backing:NSBackingStoreBuffered,
defer:false)
win.title = 'Hello World'
button = NSButton.alloc.initWithFrame(NSZeroRect)
win.contentView.addSubview(button)
button.bezelStyle = NSRoundedBezelStyle
button.title = 'Hello!'
button.sizeToFit
button.frameOrigin = NSMakePoint((win.contentView.frameSize.width / 2.0) - (button.frameSize.width / 2.0),
(win.contentView.frameSize.height / 2.0) - (button.frameSize.height / 2.0))
button_controller = Object.new
def button_controller.sayHello(sender)
puts quot;Hello World!quot;
end
button.target = button_controller
button.action = 'sayHello:'
win.display
win.orderFrontRegardless
app.run

14. HotCocoa Hello World
require ‘hotcocoa’; include HotCocoa
app = NSApplication.sharedApplication
win = NSWindow.alloc.initWithContentRect([0, 0, 200, 60],
styleMask:NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask,
backing:NSBackingStoreBuffered,
defer:false)
win.title = 'Hello World'
button = NSButton.alloc.initWithFrame(NSZeroRect)
win.contentView.addSubview(button)
button.bezelStyle = NSRoundedBezelStyle
button.title = 'Hello!'
button.sizeToFit
button.frameOrigin = NSMakePoint((win.contentView.frameSize.width / 2.0) - (button.frameSize.width / 2.0),
(win.contentView.frameSize.height / 2.0) - (button.frameSize.height / 2.0))
button_controller = Object.new
def button_controller.sayHello(sender)
puts quot;Hello World!quot;
end
button.target = button_controller
button.action = 'sayHello:'
win.display
win.orderFrontRegardless
app.run

15. HotCocoa Hello World
require ‘hotcocoa’; include HotCocoa
app = NSApplication.sharedApplication
win = window :title => ‘hello world’, :frame => [0, 0, 200, 60]
button = NSButton.alloc.initWithFrame(NSZeroRect)
win.contentView.addSubview(button)
button.bezelStyle = NSRoundedBezelStyle
button.title = 'Hello!'
button.sizeToFit
button.frameOrigin = NSMakePoint((win.contentView.frameSize.width / 2.0) - (button.frameSize.width / 2.0),
(win.contentView.frameSize.height / 2.0) - (button.frameSize.height / 2.0))
button_controller = Object.new
def button_controller.sayHello(sender)
puts quot;Hello World!quot;
end
button.target = button_controller
button.action = 'sayHello:'
win.display
win.orderFrontRegardless
app.run

16. HotCocoa Hello World
require ‘hotcocoa’; include HotCocoa
app = NSApplication.sharedApplication
win = window :title => ‘hello world’, :frame => [0, 0, 200, 60]
b = button :title => ‘Hello!’, :layout => {:align => :center}
win << b
button_controller = Object.new
def button_controller.sayHello(sender)
puts quot;Hello World!quot;
end
button.target = button_controller
button.action = 'sayHello:'
win.display
win.orderFrontRegardless
app.run

17. HotCocoa Hello World
require ‘hotcocoa’; include HotCocoa
app = NSApplication.sharedApplication
win = window :title => ‘hello world’, :frame => [0, 0, 200, 60]
b = button :title => ‘Hello!’, :layout => {:align => :center}
win << b
b.on_action { puts “Hello World!” }
win.display
win.orderFrontRegardless
app.run

18. HotCocoa Hello World
require ‘hotcocoa’; include HotCocoa
application do
win = window :title => ‘hello world’, :frame => [0, 0, 200, 60]
b = button :title => ‘Hello!’, :layout => {:align => :center}
win << b
b.on_action { puts “Hello World!” }
end

19. hotcocoa Command
HotCocoa Library

20. hotcocoa <app> Rakefile
config
build.yml
lib
menu.rb
lib
application.rb
resources
HotCocoa.icns

21. Demo

22. MacRuby Experimental
MacRuby 0.5
LLVM Objective-C 2.0 Ruby 1.9
Garbage Standard
JIT Runtime YARV Parser
Collector Library
Disk/Socket Core Garbage
AOT Built-ins
IO Foundation Collector
Numerous optimizations (speed!)
No libffi for external calls, new bridgesupport
Passing many RubySpecs already!
Will implement fully concurrent threading

23. www.macruby.org
@macruby
by rICH kILMER
Golden Gate Ruby Conf