The document discusses Ruby and Cocoa development on OSX. It provides an overview of Cocoa and its core components like Core Foundation, AppKit, and Core Audio/Video. It also discusses how to use Ruby with Cocoa via Objective-C bindings and the Cocoa frameworks. It provides code examples for interacting with Cocoa objects from Ruby and controlling applications like iTunes and Terminal via Scripting Bridge. It also covers using Grand Central Dispatch for asynchronous and parallel programming in Ruby.

1. Ruby and Cocoa
Facilitate development on OSX

2. About me

3. About me

4. Rapperswil

5. http://www.flickr.com/photos/turtlemom_nancy/4026208166/sizes/l/

6. huesler informatik

7. huesler informatik
upstream agile

8. huesler informatik
upstream agile
co-up.de

9. Ruby and Cocoa

10. Ruby

11. passionate
http://www.flickr.com/photos/gi/378823/sizes/o/

12. Apple OSX

14. passionate
http://www.flickr.com/photos/gi/378823/sizes/o/

15. Landscape
http://www.flickr.com/photos/kiumo/4203883504/sizes/o/

16. Cocoa
http://www.flickr.com/photos/luder5/4100921399/sizes/l/

17. Cocoa

18. Cocoa
• Core Foundation

19. Cocoa
• Core Foundation
• Appkit

20. Cocoa
• Core Foundation
• Appkit
• Core * (Audio/Video/Image/Data
etc.)

21. Cocoa
• Core Foundation
• Appkit
• Core * (Audio/Video/Image/Data
etc.)
• Scripting bridge

22. Cocoa
• Core Foundation
• Appkit
• Core * (Audio/Video/Image/Data
etc.)
• Scripting bridge
• others

23. Interface Builder

24. XCode

25. Objective-C

26. NSMutableArray *anArray = [
[NSMutableArray alloc] init
];
[anArray addObject:@"Element 1"];
[anArray addObject:@"Element 2"];
[anArray addObject:@"Element 3"];
//Use a for each loop to iterate
through the array
for (NSString *s in anArray) {
NSLog(s);
}
//Release the array
[anArray release]

28. Ruby And Cocoa

30. Ruby Cocoa

32. HotCocoa
picture shamelessly cropped from http://www.slideshare.net/mattetti/macruby-hotcocoa-presentation-by-rich-kilmer

33. Scripting Bridge
http://www.flickr.com/photos/bensonkua/2851908095/sizes/l/

34. Good to know

35. Good to know
• Available commands for each
application are in a .sdef file

36. Good to know
• Available commands for each
application are in a .sdef file
• Terminal.app/Contents/Resources/
Terminal.sdef

37. Good to know
• Available commands for each
application are in a .sdef file
• Terminal.app/Contents/Resources/
Terminal.sdef
• gem rb-appscript (native extension
so not for MacRuby)

38. 1 <command name="do script" code="coredosc"
2 description="Runs a UNIX shell script or command.">
3 <cocoa class="TTDoScriptCommand"/>
4 <direct-parameter type="text"
5 description="The command to execute." optional="yes"/>
6 <parameter name="with command"
7 description="Data to be passed to the Terminal..."
8 code="cmnd" optional="yes" hidden="yes">
9 <cocoa key="Command" />
10 <type type="text" />
11 <type type="any" /> <!-- support null case -->
12 </parameter>
13 <parameter name="in"
14 description="The tab in which to execute the command"
15 code="kfil" optional="yes">
16 <cocoa key="Target" />
17 <type type="tab" />
18 <type type="window" />
19 <type type="any" /> <!-- support null case -->
20 </parameter>
21 <result type="tab"
22 description="The tab the command was executed in." />
23 </command>
24

40. Control Terminal

41. 1 #!/usr/bin/env ruby
2 require 'rubygems'
3 require 'appscript'
4 include Appscript
5
6 terminal = app('Terminal')
7 current_window = terminal.windows.first
8 current_tab = current_window.tabs.last
9 process = app("System
Events").application_processes[
10 "Terminal.app"
11 ]
12
13 process.keystroke('t', :using => :command_down)
14 terminal.do_script('top', :in => current_tab)

42. 1 #!/usr/bin/env ruby
2 require 'rubygems'
3 require 'appscript'
4 include Appscript
5
6 terminal = app('Terminal')
7 current_window = terminal.windows.first
8 current_tab = current_window.tabs.last
9 process = app("System
Events").application_processes[
10 "Terminal.app"
11 ]
12
13 process.keystroke('t', :using => :command_down)
14 terminal.do_script('top', :in => current_tab)

43. 1 #!/usr/bin/env ruby
2 require 'rubygems'
3 require 'appscript'
4 include Appscript
5
6 terminal = app('Terminal')
7 current_window = terminal.windows.first
8 current_tab = current_window.tabs.last
9 process = app("System
Events").application_processes[
10 "Terminal.app"
11 ]
12
13 process.keystroke('t', :using => :command_down)
14 terminal.do_script('top', :in => current_tab)

44. 7 current_window = terminal.windows.first
8 current_tab = current_window.tabs.last
9 process = app("System
Events").application_processes[
10 "Terminal.app"
11 ]
12
13 process.keystroke('t', :using => :command_down)
14 terminal.do_script('top', :in => current_tab)

45. Problems with MacRuby

46. Problems with MacRuby

47. Problems with MacRuby
• Some methods don’t seem to be
available

48. iTunes

49. 1 #!/usr/bin/env macruby
2
3 framework 'ScriptingBridge'
4
5 itunes =
SBApplication.applicationWithBundleIdentifier(
6 "com.apple.iTunes"
7 )
8 library = itunes.sources.objectWithName
("Library")
9
10 library.userPlaylists.each do |playlist|
11 puts playlist.name
12 end

50. 2
3 framework 'ScriptingBridge'
4
5 itunes =
SBApplication.applicationWithBundleIdentifier(
6 "com.apple.iTunes"
7 )
8 library = itunes.sources.objectWithName
("Library")
9
10 library.userPlaylists.each do |playlist|
11 puts playlist.name
12 end

51. 2
3 framework 'ScriptingBridge'
4
5 itunes =
SBApplication.applicationWithBundleIdentifier(
6 "com.apple.iTunes"
7 )
8 library = itunes.sources.objectWithName
("Library")
9
10 library.userPlaylists.each do |playlist|
11 puts playlist.name
12 end

52. Core Location

53. 1 #!/usr/bin/env macruby
2 framework 'CoreLocation'
3
4 loc = CLLocationManager.alloc.init
5 loc.delegate = self
6 loc.startUpdatingLocation
7
8 # keep the script running
9 NSRunLoop.currentRunLoop.runUntilDate(
10 NSDate.distantFuture
11 )

54. 1 #!/usr/bin/env macruby
2 framework 'CoreLocation'
3
4 loc = CLLocationManager.alloc.init
5 loc.delegate = self
6 loc.startUpdatingLocation
7
8 # keep the script running
9 NSRunLoop.currentRunLoop.runUntilDate(
10 NSDate.distantFuture
11 )

55. 1 def locationManager(
2 manager,
3 didUpdateToLocation: new_location,
4 fromLocation: old_location
5 )
6
7 puts "loc: #{new_location.description}"
8 end

56. 2 framework 'CoreLocation'
3
4 loc = CLLocationManager.alloc.init
5 loc.delegate = self
6 loc.startUpdatingLocation
7
8 # keep the script running
9 NSRunLoop.currentRunLoop.runUntilDate(
10 NSDate.distantFuture
11 )

57. 1 #!/usr/bin/env macruby
2 framework 'CoreLocation'
3
4 def locationManager(manager,
5 didUpdateToLocation: new_location,
6 fromLocation: old_location
7 )
8 puts "location: #{new_location.description}"
9 end
10
11 loc = CLLocationManager.alloc.init
12 loc.delegate = self
13 loc.startUpdatingLocation
14
15 # keep the script running
16 NSRunLoop.currentRunLoop.runUntilDate(
17 NSDate.distantFuture
18 )

58. Grand Central
Dispatch

59. Grand Central Dispatch

60. Grand Central Dispatch
• MacRuby only

61. Grand Central Dispatch
• MacRuby only
• Synchronous

62. Grand Central Dispatch
• MacRuby only
• Synchronous
• Asynchronous

63. Grand Central Dispatch
• MacRuby only
• Synchronous
• Asynchronous
• Parallel

64. Grand Central Dispatch
• MacRuby only
• Synchronous
• Asynchronous
• Parallel
• Synchronization

65. Asynchronous

66. 1 #!/usr/bin/env macruby
2
3 queue = Dispatch::Queue.new(
4 'ch.huesler-informatik.scotrubyconf.gcd'
5 )
6
7 queue.async do
8 puts 'Starting asyn. NONE BLOCKING!'
9 sleep 2.00
10 puts "Finished asyn"
11 end
12 puts "code not being blocked"
13
14 NSRunLoop.currentRunLoop.runUntilDate(
15 NSDate.distantFuture
16 )
17

67. 1 #!/usr/bin/env macruby
2
3 queue = Dispatch::Queue.new(
4 'ch.huesler-informatik.scotrubyconf.gcd'
5 )
6
7 queue.async do
8 puts 'Starting asyn. NONE BLOCKING!'
9 sleep 2.00
10 puts "Finished asyn"
11 end
12 puts "code not being blocked"
13
14 NSRunLoop.currentRunLoop.runUntilDate(
15 NSDate.distantFuture
16 )
17

68. 7 queue.async do
8 puts 'Starting asyn. NONE BLOCKING!'
9 sleep 2.00
10 puts "Finished asyn"
11 end
12 puts "code not being blocked"
13
14 NSRunLoop.currentRunLoop.runUntilDate(
15 NSDate.distantFuture
16 )
17

69. Synchronous

70. 1 #!/usr/bin/env macruby
2
3 queue = Dispatch::Queue.new(
4 'ch.huesler-informatik.scotrubyconf.gcd'
5 )
6
7 queue.sync do
8 puts 'Starting sync. BLOCKING!'
9 sleep 3.0
10 puts 'Finished sync'
11 end
12 puts "code being blocked"
13
14 NSRunLoop.currentRunLoop.runUntilDate(
15 NSDate.distantFuture
16 )
17

71. Synchronized

72. 1 #!/usr/bin/env macruby
2
3 worker_queue = Dispatch::Queue.new(
4 'ch.huesler-informatik.scotrubyconf.gcd'
5 )
6 group = Dispatch::Group.new
7
8 0.upto(10) do |i|
9 puts "Dispatch #{i} to GCD"
10 worker_queue.async(group) do
11 puts "working on #{i}"
12 end
13 end
14 puts "waiting for gcd"
15 group.wait
16 puts "done"
17

73. 1 #!/usr/bin/env macruby
2
3 worker_queue = Dispatch::Queue.new(
4 'ch.huesler-informatik.scotrubyconf.gcd'
5 )
6 group = Dispatch::Group.new
7
8 0.upto(10) do |i|
9 puts "Dispatch #{i} to GCD"
10 worker_queue.async(group) do
11 puts "working on #{i}"
12 end
13 end
14 puts "waiting for gcd"
15 group.wait
16 puts "done"
17

74. 7
8 0.upto(10) do |i|
9 puts "Dispatch #{i} to GCD"
10 worker_queue.async(group) do
11 puts "working on #{i}"
12 end
13 end
14 puts "waiting for gcd"
15 group.wait
16 puts "done"
17

75. Concurrent

76. 1 #!/usr/bin/env macruby
2
3 group = Dispatch::Group.new
4 result = []
5 1.upto(10).each do |i|
6 Dispatch::Queue.concurrent.async(group) do
7 sleep 2
8 result << i
9 end
10 end
11 group.wait
12 puts result.inspect

77. .plist files

78. 1 #!/usr/bin/env ruby
2 require "osx/cocoa"
3 include OSX
4
5 file_name = 'Info.plist'
6 plist =
NSDictionary.dictionaryWithContentsOfFile(
7 file_name
8 )
9
10 plist['CFBundleVersion'] = '2.0.1'
11
12 plist.writeToFile_atomically(
13 file_name,
14 true
15 )

79. 1 #!/usr/bin/env ruby
2 require "osx/cocoa"
3 include OSX
4
5 file_name = 'Info.plist'
6 plist =
NSDictionary.dictionaryWithContentsOfFile(
7 file_name
8 )
9
10 plist['CFBundleVersion'] = '2.0.1'
11
12 plist.writeToFile_atomically(
13 file_name,
14 true
15 )

80. 3 include OSX
4
5 file_name = 'Info.plist'
6 plist =
NSDictionary.dictionaryWithContentsOfFile(
7 file_name
8 )
9
10 plist['CFBundleVersion'] = '2.0.1'
11
12 plist.writeToFile_atomically(
13 file_name,
14 true
15 )

81. Keychain
Access

82. Details

83. Details
• MacRuby has issues with void
pointer (patch pending)

84. Details
• MacRuby has issues with void
pointer (patch pending)
• Use objective c wrapper instead
(dynlib or bundle)

85. Details
• MacRuby has issues with void
pointer (patch pending)
• Use objective c wrapper instead
(dynlib or bundle)
• Generate metadata to make it
work

86. Details
• MacRuby has issues with void
pointer (patch pending)
• Use objective c wrapper instead
(dynlib or bundle)
• Generate metadata to make it
work

87. 1 export FILE_PATH = ~/Library/BridgeSupport
2 export FRAMEWORK_PATH = ~/Library/BridgeSupport/
Security.bridgesupport
3 mkdir $FILE_PATH
4 gen_bridge_metadata -f Security -o $FRAMEWORK_PATH

88. 1 require 'osx/cocoa'
2 include OSX
3 require_framework 'Security'
4
5 # Set up some relevant variables
6
7 service = "ch.huesler-informatik.scotrubyconf.keychain"
8 account = "Highlander"
9 original_password = "Rrrueby"
10
11 # Add password
12 SecKeychainAddGenericPassword(
13 nil,
14 service.length,
15 service,
16 account.length,
17 account,
18 original_password.length,
19 original_password,
20 nil
21 )

89. 1 require 'osx/cocoa'
2 include OSX
3 require_framework 'Security'
4
5 # Set up some relevant variables
6
7 service = "ch.huesler-informatik.scotrubyconf.keychain"
8 account = "Highlander"
9 original_password = "Rrrueby"
10
11 # Add password
12 SecKeychainAddGenericPassword(
13 nil,
14 service.length,
15 service,
16 account.length,
17 account,
18 original_password.length,
19 original_password,
20 nil
21 )

90. 1 # Add password
2 SecKeychainAddGenericPassword(
3 nil,
4 service.length,
5 service,
6 account.length,
7 account,
8 original_password.length,
9 original_password,
10 nil
11 )

91. 1 # Query the keychain
2 status, *password = SecKeychainFindGenericPassword(
3 nil,
4 service.length,
5 service,
6 account.length,
7 account
8 )

92. 1 # Password-related data. Shifting pointers
2 length = password.shift
3 data = password.shift
4 plain_password = data.bytestr(length)
5
6 puts "Password: #{plain_password}"

93. That’s all!
Questions?