// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "../../core/include/fpdfdoc/fpdf_doc.h"
#include "../../core/include/fpdftext/fpdf_text.h"
#include "../../public/fpdf_text.h"

#ifdef _WIN32
#include <tchar.h>
#endif

	// jabdelmalek: commented out to build on Linux.  Not used.
	// extern HANDLE g_hModule;

DLLEXPORT FPDF_TEXTPAGE STDCALL FPDFText_LoadPage(FPDF_PAGE page)
{
	if (!page) return NULL;
	IPDF_TextPage* textpage=NULL;
	CPDF_ViewerPreferences viewRef(((CPDF_Page*)page)->m_pDocument);
	textpage=IPDF_TextPage::CreateTextPage((CPDF_Page*)page,viewRef.IsDirectionR2L());
	textpage->ParseTextPage();
	return textpage;
}
DLLEXPORT void STDCALL FPDFText_ClosePage(FPDF_TEXTPAGE text_page)
{
    delete (IPDF_TextPage*)text_page;
}
DLLEXPORT int STDCALL FPDFText_CountChars(FPDF_TEXTPAGE text_page)
{
	if (!text_page) return	-1;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;
	return  textpage->CountChars();
}
DLLEXPORT unsigned int STDCALL FPDFText_GetUnicode(FPDF_TEXTPAGE text_page, int index)
{
	if (!text_page) return -1;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;

	if (index<0 || index>=textpage->CountChars()) return 0;

	FPDF_CHAR_INFO	charinfo;
	textpage->GetCharInfo(index,charinfo);
	return charinfo.m_Unicode;
}
DLLEXPORT double STDCALL FPDFText_GetFontSize(FPDF_TEXTPAGE text_page, int index)
{
	if (!text_page) return 0;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;

	if (index<0 || index>=textpage->CountChars()) return 0;

	FPDF_CHAR_INFO	charinfo;
	textpage->GetCharInfo(index,charinfo);
	return charinfo.m_FontSize;
}

DLLEXPORT void STDCALL FPDFText_GetCharBox(FPDF_TEXTPAGE text_page, int index,double* left,
													double* right, double* bottom, double* top)
{
	if (!text_page) return;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;

	if (index<0 || index>=textpage->CountChars()) return ;
	FPDF_CHAR_INFO	charinfo;
	textpage->GetCharInfo(index,charinfo);
	*left=charinfo.m_CharBox.left;
	*right=charinfo.m_CharBox.right;
	*bottom=charinfo.m_CharBox.bottom;
	*top=charinfo.m_CharBox.top;
}

//select
DLLEXPORT int STDCALL FPDFText_GetCharIndexAtPos(FPDF_TEXTPAGE text_page,double x,double y,double xTorelance,double yTorelance)
{
	if (!text_page) return -3;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;
	return textpage->GetIndexAtPos((FX_FLOAT)x,(FX_FLOAT)y,(FX_FLOAT)xTorelance,(FX_FLOAT)yTorelance);
}

DLLEXPORT int STDCALL FPDFText_GetText(FPDF_TEXTPAGE text_page,int start,int count,unsigned short* result)
{
	if (!text_page) return 0;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;

	if (start>=textpage->CountChars()) return 0;

	CFX_WideString str=textpage->GetPageText(start,count);
	if(str.GetLength()>count)
		str = str.Left(count);

	CFX_ByteString cbUTF16str = str.UTF16LE_Encode();
	FXSYS_memcpy(result,cbUTF16str.GetBuffer(cbUTF16str.GetLength()),cbUTF16str.GetLength());
	cbUTF16str.ReleaseBuffer(cbUTF16str.GetLength());

	return cbUTF16str.GetLength()/sizeof(unsigned short);
}

DLLEXPORT int STDCALL FPDFText_CountRects(FPDF_TEXTPAGE text_page,int start,int count)
{
	if (!text_page) return 0;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;
	return	textpage->CountRects(start,count);

}
DLLEXPORT void STDCALL FPDFText_GetRect(FPDF_TEXTPAGE text_page,int rect_index, double* left,double*  top,
										double*  right, double*  bottom)
{
	if (!text_page) return;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;
	CFX_FloatRect	rect;
	textpage->GetRect(rect_index,rect.left,rect.top,rect.right,rect.bottom);
	*left=rect.left;
	*top=rect.top;
	*right=rect.right;
	*bottom=rect.bottom;
}

DLLEXPORT int STDCALL FPDFText_GetBoundedText(FPDF_TEXTPAGE text_page,double left, double top,
											  double right, double bottom,unsigned short* buffer,int buflen)
{
	if (!text_page) return 0;
	IPDF_TextPage* textpage=(IPDF_TextPage*)text_page;
	CFX_FloatRect rect((FX_FLOAT)left,(FX_FLOAT)bottom,(FX_FLOAT)right,(FX_FLOAT)top);
	CFX_WideString str=textpage->GetTextByRect(rect);

	if (buflen<=0 || buffer==NULL)
	{
		return str.GetLength();
	}

	CFX_ByteString cbUTF16Str = str.UTF16LE_Encode();
	int len = cbUTF16Str.GetLength()/sizeof(unsigned short);
	int size = buflen > len ? len : buflen;
	FXSYS_memcpy(buffer,cbUTF16Str.GetBuffer(size*sizeof(unsigned short)),size*sizeof(unsigned short));
	cbUTF16Str.ReleaseBuffer(size*sizeof(unsigned short));

	return size;

}

//Search
//-1 for end
DLLEXPORT FPDF_SCHHANDLE STDCALL FPDFText_FindStart(FPDF_TEXTPAGE text_page,FPDF_WIDESTRING findwhat,unsigned long flags,int start_index)
{
	if (!text_page) return NULL;
	IPDF_TextPageFind* textpageFind=NULL;
	textpageFind=IPDF_TextPageFind::CreatePageFind((IPDF_TextPage*)text_page);
	FX_STRSIZE len = CFX_WideString::WStringLength(findwhat);
	textpageFind->FindFirst(CFX_WideString::FromUTF16LE(findwhat, len),flags,start_index);
	return textpageFind;
}
DLLEXPORT FPDF_BOOL	STDCALL FPDFText_FindNext(FPDF_SCHHANDLE handle)
{
	if (!handle) return FALSE;
	IPDF_TextPageFind* textpageFind=(IPDF_TextPageFind*)handle;
	return	textpageFind->FindNext();
}
DLLEXPORT FPDF_BOOL STDCALL FPDFText_FindPrev(FPDF_SCHHANDLE handle)
{
	if (!handle) return FALSE;
	IPDF_TextPageFind* textpageFind=(IPDF_TextPageFind*)handle;
	return	textpageFind->FindPrev();
}
DLLEXPORT int STDCALL FPDFText_GetSchResultIndex(FPDF_SCHHANDLE handle)
{
	if (!handle) return 0;
	IPDF_TextPageFind* textpageFind=(IPDF_TextPageFind*)handle;
	return textpageFind->GetCurOrder();
}
DLLEXPORT int STDCALL FPDFText_GetSchCount(FPDF_SCHHANDLE handle)
{
	if (!handle) return 0;
	IPDF_TextPageFind* textpageFind=(IPDF_TextPageFind*)handle;
	return textpageFind->GetMatchedCount();
}
DLLEXPORT void STDCALL FPDFText_FindClose(FPDF_SCHHANDLE handle)
{
	if (!handle) return;
	IPDF_TextPageFind* textpageFind=(IPDF_TextPageFind*)handle;
	delete	textpageFind;
	handle=NULL;
}

//web link
DLLEXPORT FPDF_PAGELINK STDCALL FPDFLink_LoadWebLinks(FPDF_TEXTPAGE text_page)
{
	if (!text_page) return NULL;
	IPDF_LinkExtract* pageLink=NULL;
	pageLink=IPDF_LinkExtract::CreateLinkExtract();
	pageLink->ExtractLinks((IPDF_TextPage*)text_page);
	return pageLink;
}
DLLEXPORT int STDCALL FPDFLink_CountWebLinks(FPDF_PAGELINK link_page)
{
	if (!link_page) return 0;
	IPDF_LinkExtract* pageLink=(IPDF_LinkExtract*)link_page;
	return	pageLink->CountLinks();
}
DLLEXPORT int STDCALL FPDFLink_GetURL(FPDF_PAGELINK link_page,int link_index, unsigned short* buffer,int buflen)
{
	if (!link_page) return 0;
	IPDF_LinkExtract* pageLink=(IPDF_LinkExtract*)link_page;
	CFX_WideString url=pageLink->GetURL(link_index);

	CFX_ByteString cbUTF16URL = url.UTF16LE_Encode();
	int len= cbUTF16URL.GetLength()/sizeof(unsigned short);
	if (buffer==NULL || buflen<=0)
		return len;
	int size=len<buflen ? len :buflen;
	if (size>0)
	{
		FXSYS_memcpy(buffer,cbUTF16URL.GetBuffer(size*sizeof(unsigned short)),size*sizeof(unsigned short));
		cbUTF16URL.ReleaseBuffer(size*sizeof(unsigned short));
	}
	return size;
}
DLLEXPORT int STDCALL FPDFLink_CountRects(FPDF_PAGELINK link_page,int link_index)
{
	if (!link_page) return 0;
	IPDF_LinkExtract* pageLink=(IPDF_LinkExtract*)link_page;
	CFX_RectArray rectArray;
	pageLink->GetRects(link_index,rectArray);
	return rectArray.GetSize();
}
DLLEXPORT void STDCALL FPDFLink_GetRect(FPDF_PAGELINK link_page,int link_index,  int rect_index, double* left,
										double*  top,double*  right, double*  bottom)
{
	if (!link_page) return;
	IPDF_LinkExtract* pageLink=(IPDF_LinkExtract*)link_page;
	CFX_RectArray rectArray;
	pageLink->GetRects(link_index,rectArray);
	if (rect_index >= 0 && rect_index < rectArray.GetSize()) {
		CFX_FloatRect rect=rectArray.GetAt(rect_index);
		*left=rect.left;
		*right=rect.right;
		*top=rect.top;
		*bottom=rect.bottom;
	}
}
DLLEXPORT void	STDCALL	FPDFLink_CloseWebLinks(FPDF_PAGELINK link_page)
{
    delete (IPDF_LinkExtract*)link_page;
}