require 'osx/cocoa'

module Stuff
  module TextGenerator
    
    class Processor
      def self.generate_text(options)
        app = OSX::NSApplication.sharedApplication
        delegate = ProcessorApplication.alloc.init
        delegate.options = options
        app.setDelegate(delegate)        
        app.run
      end
    end

    class ProcessorApplication < OSX::NSObject
      include OSX
      attr_accessor :options
      
      def initialize
        rect = [-16000, -16000, 5000, 5000]
        @window = NSWindow.alloc.initWithContentRect_styleMask_backing_defer(rect, NSBorderlessWindowMask, 2, 0)
        #win.setOpaque(false)
        @window.setAlphaValue(1.0)
      end
      
      def applicationDidFinishLaunching(notification)
        @options[:strings].each do |string|
          view = draw_string(string, @options)
          save(view, 'test.png')
        end
        
        NSApplication.sharedApplication.terminate(nil)
      end
      
      def draw_string(string, options)
        puts "Drawing: #{string}"
        text_view = NSTextView.alloc.initWithFrame([0,0,0,0])
        text_view.setHorizontallyResizable(true)
      
        text_view.setTextColor(NSColor.blackColor)
        text_view.setFont(NSFont.fontWithName_size(options[:font], options[:size]))
        #@text_view.setBackgroundColor(NSColor.clearColor)
        text_view.setBackgroundColor(NSColor.whiteColor)
      
        if (options[:kerning]!=0)
          method = options[:kerning] > 0 ? 'loosenKerning' : 'tightenKerning'
          options[:kerning].abs.times do
            text_view.send(method, nil)
          end
        end
      
        text_view.setString(string)
        text_view.sizeToFit
      
        @window.setContentView(text_view)
        @window.display
        @window.orderFrontRegardless
        
        return text_view
      end
      
      def save(view, file)
        view.lockFocus
        bitmap = NSBitmapImageRep.alloc.initWithFocusedViewRect(view.bounds)
        view.unlockFocus
      
        png = bitmap.representationUsingType_properties(NSPNGFileType, nil)
        png.writeToFile_atomically(file, true)
      end
    end

  end
end