pjs/layout/base/src/nsPrintContext.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#include "nsPresContext.h"
#include "nsIPrintContext.h"
#include "nsIDeviceContext.h"
#include "nsUnitConversion.h"
#include "nsIView.h"
#include "nsIWidget.h"
#include "nsGfxCIID.h"
#include "nsLayoutAtoms.h"
#include "nsIPrintSettings.h"


class PrintContext : public nsPresContext , nsIPrintContext{
public:
  //NS_DEFINE_STATIC_IID_ACCESSOR(NS_IPRINTCONTEXT_IID)

//Interfaces for addref and release and queryinterface
//NOTE macro used is for classes that inherit from 
// another class. Only the base class should use NS_DECL_ISUPPORTS
  NS_DECL_ISUPPORTS_INHERITED


  PrintContext();
  ~PrintContext();

  NS_IMETHOD GetImageLoadFlags(nsLoadFlags& aLoadFlags);
  NS_IMETHOD GetMedium(nsIAtom** aMedium);
  NS_IMETHOD IsPaginated(PRBool* aResult);
  NS_IMETHOD SetPaginatedScrolling(PRBool aResult)  { return NS_ERROR_FAILURE; }
  NS_IMETHOD GetPaginatedScrolling(PRBool* aResult);
  NS_IMETHOD GetPageDim(nsRect* aActualRect, nsRect* aAdjRect);
  NS_IMETHOD SetPageDim(nsRect* aRect);
  NS_IMETHOD SetPrintSettings(nsIPrintSettings* aPS);
  NS_IMETHOD GetPrintSettings(nsIPrintSettings** aPS);

protected:
  nsRect       mPageDim;
  nsCOMPtr<nsIPrintSettings> mPrintSettings;
};

PrintContext::PrintContext() :
  mPageDim(0,0,0,0)
{
  SetBackgroundImageDraw(PR_FALSE);
  SetBackgroundColorDraw(PR_FALSE);
}

PrintContext::~PrintContext()
{
}

NS_IMPL_ADDREF_INHERITED(PrintContext,nsPresContext)


NS_IMPL_RELEASE_INHERITED(PrintContext,nsPresContext)

//---------------------------------------------------------
NS_IMETHODIMP
PrintContext::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
 
  if (aIID.Equals(NS_GET_IID(nsIPrintContext))) {
    *aInstancePtr = (void *)((nsIPrintContext*)this);
    NS_ADDREF_THIS();
    return NS_OK;
  }

  return nsPresContext::QueryInterface(aIID, aInstancePtr);
}

NS_IMETHODIMP 
PrintContext::GetImageLoadFlags(nsLoadFlags& aLoadFlags)
{
  aLoadFlags = nsIRequest::LOAD_FROM_CACHE | nsIRequest::VALIDATE_NEVER | nsIRequest::LOAD_NORMAL;
  return NS_OK;
}

NS_IMETHODIMP
PrintContext::GetMedium(nsIAtom** aResult)
{
  NS_ENSURE_ARG_POINTER(aResult);
  *aResult = nsLayoutAtoms::print;
  NS_ADDREF(*aResult);
  return NS_OK;
}

NS_IMETHODIMP
PrintContext::IsPaginated(PRBool* aResult)
{
  NS_ENSURE_ARG_POINTER(aResult);
  *aResult = PR_TRUE;
  return NS_OK;
}

NS_IMETHODIMP
PrintContext::GetPaginatedScrolling(PRBool* aResult)
{
  NS_ENSURE_ARG_POINTER(aResult);
  *aResult = PR_FALSE;
  return NS_OK;
}

NS_IMETHODIMP
PrintContext::GetPageDim(nsRect* aActualRect, nsRect* aAdjRect)
{
  NS_ENSURE_ARG_POINTER(aActualRect);
  NS_ENSURE_ARG_POINTER(aAdjRect);

  PRInt32 width,height;
  if (NS_SUCCEEDED(mDeviceContext->GetDeviceSurfaceDimensions(width, height))) {
    aActualRect->SetRect(0, 0, width, height);
  }
  *aAdjRect = mPageDim;
  return NS_OK;
}

NS_IMETHODIMP
PrintContext::SetPageDim(nsRect* aPageDim)
{
  NS_ENSURE_ARG_POINTER(aPageDim);
  mPageDim = *aPageDim;
  return NS_OK;
}

NS_IMETHODIMP 
PrintContext::SetPrintSettings(nsIPrintSettings * aPrintSettings)
{
  NS_ENSURE_ARG_POINTER(aPrintSettings);
  mPrintSettings = aPrintSettings;
  return NS_OK;
}

NS_IMETHODIMP 
PrintContext::GetPrintSettings(nsIPrintSettings * *aPrintSettings)
{
  NS_ENSURE_ARG_POINTER(aPrintSettings);

  *aPrintSettings = mPrintSettings;
  NS_IF_ADDREF(*aPrintSettings);

  return NS_OK;
}


NS_EXPORT nsresult
NS_NewPrintContext(nsIPrintContext** aInstancePtrResult)
{
  NS_ENSURE_ARG_POINTER(aInstancePtrResult);

  if (aInstancePtrResult == nsnull) {
    return NS_ERROR_NULL_POINTER;
  }

  PrintContext *it = new PrintContext;

  if (it == nsnull) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  return it->QueryInterface(NS_GET_IID(nsIPrintContext), (void **) aInstancePtrResult);
}