[MacRuby-devel] Custom URL scheme (again)

11 Jan 2011

      I went back to this today to take it a step further and found my way
blocked - it seems to be a MacRuby thing because this is trivial to
implement in Objective-C.

This code is now:

framework 'Cocoa'
class AppDelegate
  def initialize
    registerExperimental
    @eventDescriptor =
NSAppleEventDescriptor.descriptorWithString("this_is_a_string")
  end

  def registerExperimental
    sharedAEManager = NSAppleEventManager.sharedAppleEventManager
    sharedAEManager.setEventHandler(self,
andSelector: :"getURL:event:withReplyEvent:returnEvent",
forEventClass: KInternetEventClass, andEventID:KAEGetURL)
  end

  def getURL(event, withReplyEvent:returnEvent)
    if event.respond_to?(:paramDescriptorForKeyword)
      url = event.paramDescriptorForKeyword(keyDirectObject).to_s
    end
  end

  def applicationShouldTerminateAfterLastWindowClosed(theApplication)
    return true;
  end
end

I've edited the info.plist to register 'experimental' as a custom URL
scheme and tested it by calling it in Safari.
Typing 'experimental://' in the Safari address bar produces an error:
experimental[4759]: -[AppDelegate
getURL:event:withReplyEvent:returnEvent]: unrecognised selector sent
to instance 0x200c0e240

I've tried re-writing the
'andSelector: :"getURL:event:withReplyEvent:returnEvent"' part of the
setEventHandler call every way I can think of:
andSelector:"getURL:event:withReplyEvent:returnEvent"
andSelector:"getURL:withReplyEvent"
to name but two. I'm fairly sure the whole method name has to be sent,
including the argument names, so I can't really see what is wrong. As
I say, I've constructed the Obj-C equivalent (experimental-cpp) where
typing 'experimental-cpp:///splat' produces exactly the required
response.

Any ideas anyone, please?

[MacRuby-devel] Custom URL scheme (again)

Martin Hawkins