/*

* Copyright (c) 2000 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#include "nw_fbox_formboxutils.h"

#include "nwx_defs.h"

#include "nwx_string.h"

#include "nw_fbox_formbox.h"

#include "BrsrStatusCodes.h"

/* ------------------------------------------------------------------------- *

    private data typed

 * ------------------------------------------------------------------------- */

const NW_Ucs2 EscapeChar = '\\';

const NW_Ucs2 NW_FBox_FormBoxUtils_Truncate[] = {'.','.','.','\0'};

const NW_Ucs2 NW_FBox_FormBoxUtils_TrueStr[] = { 't', 'r', 'u', 'e', '\0' };

const NW_Ucs2 NW_FBox_FormBoxUtils_FalseStr[] = { 'f', 'a', 'l', 's', 'e', '\0' };

/* ------------------------------------------------------------------------- */

TBrowserStatusCode 

NW_FBox_FormBoxUtils_GetDisplayLength(CGDIDeviceContext* deviceContext,

																			NW_Text_t* text,

                                      CGDIFont* font,

																			NW_Text_Length_t totalLength,

																			NW_Uint16 width,

																			NW_Text_Length_t* displayLength,

																			NW_Bool isNumber)

  {

  NW_GDI_Dimension2D_t extent;

  NW_GDI_Dimension2D_t truncate_extent;

  NW_Text_UCS2_t* truncate_text;

  TBrowserStatusCode status = KBrsrSuccess;

  NW_Bool OverFlow = NW_FALSE;

  NW_Text_Length_t i;

	NW_Text_Length_t start = 0;

  truncate_text = NW_Text_UCS2_New ((NW_Ucs2*) NW_FBox_FormBoxUtils_Truncate, 

                                    NW_FBox_FormBoxUtils_Truncate_len, 

                                    0);

  if (truncate_text == NULL)

    {

    return KBrsrOutOfMemory;

    }

  status = deviceContext->GetTextExtent ( NW_TextOf(truncate_text),

                                          font,

                                          0, 

                                          NW_GDI_FlowDirection_LeftRight, 

                                          &truncate_extent);

  if (status != KBrsrSuccess)

    {

    NW_Object_Delete(truncate_text);

    return status;

    }

  NW_Object_Delete(truncate_text);

  extent.width = 0;

  extent.height = 0;

  for (i=1; i<=totalLength; i++) 

    {

		if(isNumber)

		  {

			start = (NW_Text_Length_t) (totalLength - i);

		  }

    status = deviceContext->GetSubstringExtent( text, 

                                                font,

                                                start, 

                                                i,

                                                0, 

                                                NW_GDI_FlowDirection_LeftRight, 

                                                &extent );

    if (status != KBrsrSuccess)

      {

      return status;

      }

    if(!OverFlow)

      {

      if(extent.width > width)

        {

        if(i > 3) 

          {

					i = (NW_Text_Length_t) (i - 3);

				  }

				else 

          {

					i = 0;

			  	}

        OverFlow = NW_TRUE;

        }

      continue;

      }

    else if ((extent.width + truncate_extent.width) > width) 

      {

      break;

      }

    }

  *displayLength = --i;

  return status;

}

/* ------------------------------------------------------------------------- */

NW_HED_DocumentRoot_t *

NW_FBox_FormBoxUtils_GetDocRoot(NW_LMgr_Box_t* box)

{

  NW_HED_DocumentRoot_t* docRoot = NULL;

  NW_FBox_FormLiaison_t  *fboxFormLiaison = NULL;

  NW_ASSERT(box != NULL);

  NW_ASSERT(NW_Object_IsInstanceOf(box, &NW_FBox_FormBox_Class));

  fboxFormLiaison = NW_FBox_FormBox_GetFormLiaison (box);

  (void) NW_FBox_FormLiaison_GetDocRoot(fboxFormLiaison, &docRoot );

  return docRoot;

}

/* ------------------------------------------------------------------------- */

NW_Uint16

NW_FBox_FormBoxUtils_GetNumEscapeChars(const NW_Ucs2* format)

{

	NW_Uint16 numEscapeChars = 0;

	if((!format) || (!*format))

	{

		return numEscapeChars;

	}

	while(*format)

	{

		if((*format == EscapeChar) && *(format + 1))

		{

			numEscapeChars++;

			format++;

		}

		format++;

	}

	return numEscapeChars;

}

/* ------------------------------------------------------------------------- */

void

NW_FBox_FormBoxUtils_FillEscapeChars(const NW_Ucs2* format, NW_Ucs2 *input, 

                                     NW_Ucs2 *retValue, NW_Uint16 retValueLen)

{

	if( (!format) || (!*format) || (!input))

	{

		return;

	}

	while(*format && retValueLen)

	{

		if((*format == EscapeChar) && *(format + 1))

		{

			format++;

			*retValue = *format;

			retValue++;

		}

		else if (*input)

		{

			*retValue = *input;

			retValue++;

			input++;

		}

		else

		{

			break;

		}

		format++;

		retValueLen --;

	}

	while(*input && retValueLen)

	{

        /*lint --e{794} Conceivable use of null pointer*/

		*retValue = *input;

		retValue++;

		input++;

		retValueLen --;

	}

}

/* ------------------------------------------------------------------------- */

void

NW_FBox_FormBoxUtils_StripEscapeChars(const NW_Ucs2* format, NW_Ucs2 *input, 

																			NW_Ucs2 *retValue, NW_Uint16 retValueLen)

{

	if( (!format) || (!*format) || (!input))

	{

		return;

	}

	while(*format && *input && retValueLen)

	{

		if((*format == EscapeChar) && *(format + 1))

		{

			format += 2;

		}

		else

		{

			*retValue = *input;

			retValue++;

			format++;

			retValueLen --;

		}

		input++;

	}

	while(*input && retValueLen)

	{

		*retValue = *input;

		retValue++;

		input++;

		retValueLen --;

	}

}