# helpers for Eclipse and resources
require 'java'
 
def workspace()
 include_class 'org.eclipse.core.resources.ResourcesPlugin'
 $res = ResourcesPlugin
 return $res.getWorkspace()
end
 
def create_new_scratch_view(newViewIdAsString)
   syncExec do
     # Hack: the constant "1" is the VIEW_CREATE constant in IWorkbenchPage     
     active_page().showView("net.sf.eclipseshell.views.ScratchPadView", newViewIdAsString, 1)
   end
end

# Creates a ScratchPadView and returns the ScratchPadView object. Use the getComponent method to 
# access it's component and add components to it.
# @param nameAsString a String as the secondaryViewId, this is needed to distinguish several instances of the View
# @return object of ScratchPadView
def createScratchPadView(nameAsString)
  create_new_scratch_view(nameAsString)
  retVal = nil
 syncExec do 
   $refs = active_page().getViewReferences()	
   $refs.each{|ref|
   
   id = ref.getSecondaryId
    if id != nil
      if id.include?(nameAsString)
        retVal = ref.getView(true)
      end
    end
   }   
 end
 retVal
end
 
 
def project_by_name(projectNameString) 
 root = workspace().root
 return root.getProject(projectNameString)
end

def workbench()
   include_class 'org.eclipse.ui.PlatformUI'
   return PlatformUI.getWorkbench().getActiveWorkbenchWindow()
end

def active_page()
   return workbench().getActivePage()
end

# returns the activePart in the activePage in the Workbench
def active_part()
   return active_Page().getActivePart()
end

def open_editor(iFileObject)
   include_class 'org.eclipse.ui.ide.IDE'
   IDE.openEditor(workbench().activePage, iFileObject)   
end

# Call the Display.syncExec method 
def syncExec(&block)
   include_class 'org.eclipse.swt.widgets.Display'
   include_class 'java.lang.Runnable'
   disp = Display.getDefault()
#   yield
   # setup a 
   runnable = Runnable.new
   class << runnable  
       def setBlock(bl)
         @block = bl
       end
       def run
       #IDE.openEditor(active_page(), $dginp , "DependencyGraph")
       @block.call(self) 
     end
   end
   runnable.setBlock(block)
   disp.syncExec(runnable)
end

def open_file(nameAsString)
  syncExec do
     open_editor(workspace().getRoot.getFile(nameAsString))
  end
end

def ps(*args)
  include_class "net.sf.eclipseshell.extensions.ExecutionEnvironmentLaunchManager"
  processes = ExecutionEnvironmentLaunchManager.getAllActiveExecutionEnvironments.toArray
  # bit of a hack: Java arrays don't seem to support collect{}
  retVal = []
  pr = false
  if(args.length > 0 )
    if(args[0] == :pr)
       pr = true
    end
  end
  processes.each{|pr| 
    if(pr)
      retVal << pr.to_s + "\n"
    else 
      retVal << pr
    end
  }
  retVal
end


$workspace = workspace()
$workbench = syncExec {workbench()}