/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 *
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *
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//---- Factory Includes & Stuff -----// 
#include "nsIFactory.h" 
#include "nsIComponentManager.h" 
#include "nsIServiceManager.h"
#include "nsIEventQueueService.h"
#include "nsIEventQueue.h"
#include "nsGfxCIID.h" 

#include "nsWidgetsCID.h" 
#include "nsIWidget.h"
#include "nsGUIEvent.h"
#include "nsString.h"
#include "nsRect.h"
#include "nsIRenderingContext.h"

#include "nsIDeviceContext.h"
#include "nsFont.h"
#include "nsIComponentManager.h"
#include "nsWidgetsCID.h"
#include "nsIAppShell.h"

//------------------------------------------------------------------------------

nsIWidget         *gWindow = NULL;

#if defined(XP_WIN) || defined(XP_OS2)
#define TEXT_HEIGHT 25
#endif

#if defined(XP_UNIX) || defined(XP_BEOS)
#define TEXT_HEIGHT 30
#endif

#ifdef XP_MAC
#define TEXT_HEIGHT 30
#endif

// class ids
static NS_DEFINE_CID(kCWindowCID, NS_WINDOW_CID);
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_CID(kCAppShellCID, NS_APPSHELL_CID);

// Scroll offsets
nscoord gOffsetX = 0;
nscoord gOffsetY = 0;

nscoord pixelLoc(nscoord aPixelValue, float aP2t, nscoord aOffset)
{
  return NSToIntRound((aPixelValue + aOffset) * aP2t);
}


PRInt32
drawtest(nsIRenderingContext *aSurface)
{
nsFont  *font;
nsPoint *pointlist;

   // Get the size of a pixel.
  nsCOMPtr<nsIDeviceContext> deviceContext;
  aSurface->GetDeviceContext(*getter_AddRefs(deviceContext));
  float p2t; // pixel to twips conversion
  p2t = deviceContext->DevUnitsToAppUnits();

  font = new nsFont("Times", NS_FONT_STYLE_NORMAL,NS_FONT_VARIANT_NORMAL,NS_FONT_WEIGHT_BOLD,0,12);
  aSurface->SetFont(*font);

   // Clear surface.
  nsRect rect;
  gWindow->GetClientBounds(rect);
  aSurface->SetColor(NS_RGB(255, 255, 255));
  aSurface->FillRect(0,0,rect.width,rect.height);

  aSurface->SetColor(NS_RGB(255, 0, 0));
 
  nsAutoString strText6(NS_LITERAL_STRING("GFX - Pixel coverage test"));
  aSurface->DrawString(strText6,150,30);
  nsAutoString strText5(NS_LITERAL_STRING("(Use (u, d, r, l) keys to scroll the window contents)"));
  aSurface->DrawString(strText5,150,50);


            
  aSurface->Translate(gOffsetX, gOffsetY);

   // Starting coordinates
  nscoord ox = 90; // pixels
  nscoord oy = 100; // pixels
   // Spacing between tests
  nscoord yspacing = 50; // pixels
 
   //--------------
   // DrawLine TEST
   //--------------

  aSurface->SetColor(NS_RGB(255, 0, 0));
  aSurface->DrawLine(pixelLoc(12, p2t, ox),
                     pixelLoc(0,  p2t, oy), 
                     pixelLoc(12, p2t, ox), 
                     pixelLoc(10, p2t, oy));

  aSurface->SetColor(NS_RGB(0, 0, 0));
  aSurface->DrawLine(pixelLoc(0, p2t, ox),
                     pixelLoc(10,p2t, oy), 
                     pixelLoc(12,p2t, ox), 
                     pixelLoc(10, p2t, oy));

   nsAutoString strText4(NS_LITERAL_STRING("DrawLine - There should be a one pixel gap where the red and black lines meet"));
   aSurface->DrawString(strText4, ox + 30, oy);


  oy += yspacing;

 //------------------
  // DrawPolyline TEST
  //------------------


  pointlist = new nsPoint[5];
  pointlist[0].x = pixelLoc(0, p2t, ox);
  pointlist[0].y = pixelLoc(0, p2t, oy);

  pointlist[1].x = pixelLoc(10, p2t, ox);
  pointlist[1].y = pixelLoc(0, p2t, oy);

  pointlist[2].x = pixelLoc(10, p2t, ox);
  pointlist[2].y = pixelLoc(10, p2t, oy);

  pointlist[3].x = pixelLoc(0, p2t, ox);
  pointlist[3].y = pixelLoc(10, p2t, oy);

  pointlist[4].x = pixelLoc(0, p2t, ox);
  pointlist[4].y = pixelLoc(1, p2t, oy);

  aSurface->DrawPolyline(pointlist,5);

  nsAutoString strText3(NS_LITERAL_STRING("DrawPolyline - There should be a one pixel gap in the rectangle"));
  aSurface->DrawString(strText3, ox + 30, oy);

  delete [] pointlist;

  oy += yspacing;


   //--------------
   // FillRect TEST
   //--------------
   
  aSurface->SetColor(NS_RGB(255, 0, 0));
  aSurface->DrawLine(pixelLoc(9,p2t, ox),
                     pixelLoc(0,p2t, oy), 
                     pixelLoc(9,p2t,  ox), 
                     pixelLoc(30,p2t, oy));

  aSurface->SetColor(NS_RGB(0, 0, 0));
  aSurface->FillRect(pixelLoc(0,  p2t, ox),
                     pixelLoc(10,  p2t, oy),
                     pixelLoc(10, p2t,  0),
                     pixelLoc(10, p2t,  0));


  nsAutoString strText2(NS_LITERAL_STRING("FillRect - The red line should be at the right edge under the rectangle"));
  aSurface->DrawString(strText2, ox + 30, oy);



  oy += yspacing; 

  //--------------
  // DrawRect TEST
  //--------------

  aSurface->SetColor(NS_RGB(255, 0, 0));
  aSurface->DrawLine(pixelLoc(9,p2t, ox),
                     pixelLoc(0,p2t, oy), 
                     pixelLoc(9,p2t,  ox), 
                     pixelLoc(30,p2t, oy));

  aSurface->SetColor(NS_RGB(0, 0, 0));
  aSurface->DrawRect(pixelLoc(0,  p2t, ox),
                     pixelLoc(10,  p2t, oy),
                     pixelLoc(10, p2t,  0),
                     pixelLoc(10, p2t,  0));


  nsAutoString strText1(NS_LITERAL_STRING("DrawRect - The red line should be at the right edge under the rectangle"));
  aSurface->DrawString(strText1, ox + 30, oy);

  oy += yspacing;


 /*
#ifdef WINDOWSBROKEN
  pointlist = new nsPoint[5];
  pointlist[0].x = 200;pointlist[0].y = 200;
  pointlist[1].x = 250;pointlist[1].y = 200;
  pointlist[2].x = 240;pointlist[2].y = 220;
  pointlist[3].x = 260;pointlist[3].y = 240;
  pointlist[4].x = 225;pointlist[4].y = 225;
  aSurface->DrawPolygon(pointlist,6);
  aSurface->DrawString("This is an open Polygon\0",250,200);
  delete [] pointlist;
#endif  

  aSurface->DrawEllipse(30, 150,50,100);
  aSurface->DrawString("This is an Ellipse\0",30,140);
*/

  return(30);
}




/**--------------------------------------------------------------------------------
 * Main Handler
 *--------------------------------------------------------------------------------
 */
nsEventStatus HandleEvent(nsGUIEvent *aEvent)
{ 
   nsEventStatus result = nsEventStatus_eIgnore;

   switch(aEvent->message) {

        case NS_PAINT: 
           
              // paint the background
            if (aEvent->widget == gWindow) {
                nsIRenderingContext *drawCtx = ((nsPaintEvent*)aEvent)->renderingContext;
                drawCtx->SetColor(aEvent->widget->GetBackgroundColor());
                drawCtx->FillRect(*(((nsPaintEvent*)aEvent)->rect));
                drawtest(drawCtx);

                return nsEventStatus_eIgnore;
            }

            break;

        case NS_KEY_UP: {
            nsKeyEvent * ke = (nsKeyEvent*)aEvent;
            char str[256];
            sprintf(str, "Key Event Key Code[%d] Key [%c] Shift [%s] Control [%s] Alt [%s]",
              ke->keyCode, ke->keyCode, 
              (ke->isShift?"Pressed":"Released"),
              (ke->isControl?"Pressed":"Released"),
              (ke->isAlt?"Pressed":"Released"));
            printf("%s\n", str);
            switch(ke->keyCode) {
               case 'U':
                 gOffsetY -= 9;
                 gWindow->Invalidate(PR_FALSE);
               break;

               case 'D':
                 gOffsetY += 10;
                 gWindow->Invalidate(PR_FALSE);
                break;

               case 'R':
                 gOffsetX += 9;
                 gWindow->Invalidate(PR_FALSE);
               break;

               case 'L':
                 gOffsetX -= 10;
                 gWindow->Invalidate(PR_FALSE);
               break;
            }
            }
            break;
        
        case NS_DESTROY:
            exit(0); // for now
            break;

        default:
            result = nsEventStatus_eIgnore;
    }


    return result;
}


/**--------------------------------------------------------------------------------
 *
 */
nsresult CoverageTest(int *argc, char **argv)
{
    nsresult res = NS_InitXPCOM2(nsnull, nsnull, nsnull);
    if (NS_FAILED(res))
        return res;

    // Create the Event Queue for the UI thread...
    nsCOMPtr<nsIEventQueueService> eventQService =
        do_GetService(kEventQueueServiceCID, &res);

    if (NS_OK != res) {
        NS_ASSERTION(PR_FALSE, "Could not obtain the event queue service");
        return res;
    }

      // Create a application shell
    nsIAppShell *appShell;
    CallCreateInstance(kCAppShellCID, &appShell);
    if (appShell != nsnull) {
      fputs("Created AppShell\n", stderr);
      appShell->Create(argc, argv);
    } else {
      printf("AppShell is null!\n");
    }

    nsIDeviceContext* deviceContext = 0;

    // Create a device context for the widgets

    static NS_DEFINE_IID(kDeviceContextCID, NS_DEVICE_CONTEXT_CID);
    static NS_DEFINE_IID(kDeviceContextIID, NS_IDEVICE_CONTEXT_IID);

    //
    // create the main window
    //
    CallCreateInstance(kCWindowCID, &gWindow);
    nsRect rect(100, 100, 600, 700);
    gWindow->Create((nsIWidget*) nsnull, rect, HandleEvent, 
                   (nsIDeviceContext *) nsnull,
                   appShell);

    nsAutoString strTitle(NS_LITERAL_STRING("Pixel coverage test"));
    gWindow->SetTitle(strTitle);


    //
    // Create Device Context based on main window
    //
    res = CallCreateInstance(kDeviceContextCID, &deviceContext);

    if (NS_OK == res)
    {
      deviceContext->Init(gWindow);
      NS_ADDREF(deviceContext);
    }

    gWindow->Show(PR_TRUE);

 
    return(appShell->Run());
}


