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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <vcl/VectorGraphicSearch.hxx>
#include <sal/config.h>
#include <fpdf_doc.h>
#include <fpdf_text.h>
class VectorGraphicSearch::Implementation
{
public:
FPDF_DOCUMENT mpPdfDocument;
Implementation()
: mpPdfDocument(nullptr)
{
}
~Implementation()
{
if (mpPdfDocument)
FPDF_CloseDocument(mpPdfDocument);
}
};
class SearchContext
{
private:
FPDF_DOCUMENT mpPdfDocument;
FPDF_PAGE mpPage;
FPDF_TEXTPAGE mpTextPage;
FPDF_SCHHANDLE mpSearchHandle;
public:
sal_Int32 mnPageIndex;
OUString maSearchString;
SearchStartPosition meStartPosition;
SearchContext(FPDF_DOCUMENT pPdfDocument, sal_Int32 nPageIndex, OUString const& rSearchString,
SearchStartPosition eStartPosition)
: mpPdfDocument(pPdfDocument)
, mpPage(nullptr)
, mpTextPage(nullptr)
, mpSearchHandle(nullptr)
, mnPageIndex(nPageIndex)
, maSearchString(rSearchString)
, meStartPosition(eStartPosition)
{
}
~SearchContext()
{
if (mpSearchHandle)
FPDFText_FindClose(mpSearchHandle);
if (mpTextPage)
FPDFText_ClosePage(mpTextPage);
if (mpPage)
FPDF_ClosePage(mpPage);
}
basegfx::B2DSize getPageSize()
{
basegfx::B2DSize aSize;
if (!mpPdfDocument)
return aSize;
FS_SIZEF aPDFSize;
if (FPDF_GetPageSizeByIndexF(mpPdfDocument, mnPageIndex, &aPDFSize))
{
aSize = basegfx::B2DSize(convertPointToMm100(aPDFSize.width),
convertPointToMm100(aPDFSize.height));
}
return aSize;
}
bool initialize()
{
if (!mpPdfDocument)
return false;
mpPage = FPDF_LoadPage(mpPdfDocument, mnPageIndex);
if (!mpPage)
return false;
mpTextPage = FPDFText_LoadPage(mpPage);
if (!mpTextPage)
return false;
FPDF_WIDESTRING pString = reinterpret_cast<FPDF_WIDESTRING>(maSearchString.getStr());
// Index where to start to search. -1 => at the end
int nStartIndex = meStartPosition == SearchStartPosition::End ? -1 : 0;
// FPDF_MATCHCASE, FPDF_MATCHWHOLEWORD, FPDF_CONSECUTIVE
// FPDF_MATCHCASE - If not set, it will not match case by default.
// FPDF_MATCHWHOLEWORD - If not set, it will not match the whole word by default.
// FPDF_CONSECUTIVE - If not set, it will skip past the current match to look for the next match.
int nSearchFlags = 0;
mpSearchHandle = FPDFText_FindStart(mpTextPage, pString, nSearchFlags, nStartIndex);
return mpSearchHandle != nullptr;
}
bool next()
{
if (mpSearchHandle)
return FPDFText_FindNext(mpSearchHandle);
return false;
}
bool previous()
{
if (mpSearchHandle)
return FPDFText_FindPrev(mpSearchHandle);
return false;
}
int index()
{
if (mpSearchHandle)
return FPDFText_GetSchResultIndex(mpSearchHandle);
return -1;
}
int size()
{
if (mpSearchHandle)
return FPDFText_GetSchCount(mpSearchHandle);
return -1;
}
std::vector<basegfx::B2DRectangle> getTextRectangles()
{
std::vector<basegfx::B2DRectangle> aRectangles;
if (!mpTextPage || !mpSearchHandle)
return aRectangles;
int nIndex = index();
if (nIndex < 0)
return aRectangles;
int nSize = size();
if (nSize <= 0)
return aRectangles;
double fPageHeight = getPageSize().getY();
for (int nCount = 0; nCount < nSize; nCount++)
{
double left = 0.0;
double right = 0.0;
double bottom = 0.0;
double top = 0.0;
if (FPDFText_GetCharBox(mpTextPage, nIndex + nCount, &left, &right, &bottom, &top))
{
left = convertPointToMm100(left);
right = convertPointToMm100(right);
top = fPageHeight - convertPointToMm100(top);
bottom = fPageHeight - convertPointToMm100(bottom);
aRectangles.emplace_back(left, bottom, right, top);
}
}
return aRectangles;
}
};
VectorGraphicSearch::VectorGraphicSearch(Graphic const& rGraphic)
: mpImplementation(std::make_unique<VectorGraphicSearch::Implementation>())
, maGraphic(rGraphic)
{
FPDF_LIBRARY_CONFIG aConfig;
aConfig.version = 2;
aConfig.m_pUserFontPaths = nullptr;
aConfig.m_pIsolate = nullptr;
aConfig.m_v8EmbedderSlot = 0;
FPDF_InitLibraryWithConfig(&aConfig);
}
VectorGraphicSearch::~VectorGraphicSearch()
{
mpSearchContext.reset();
mpImplementation.reset();
FPDF_DestroyLibrary();
}
bool VectorGraphicSearch::search(OUString const& rSearchString, SearchStartPosition eStartPosition)
{
auto pData = maGraphic.getVectorGraphicData();
if (pData && pData->getVectorGraphicDataType() == VectorGraphicDataType::Pdf)
{
return searchPDF(pData, rSearchString, eStartPosition);
}
return false;
}
bool VectorGraphicSearch::searchPDF(std::shared_ptr<VectorGraphicData> const& rData,
OUString const& rSearchString,
SearchStartPosition eStartPosition)
{
if (rSearchString.isEmpty())
return false;
mpImplementation->mpPdfDocument
= FPDF_LoadMemDocument(rData->getVectorGraphicDataArray().getConstArray(),
rData->getVectorGraphicDataArrayLength(), /*password=*/nullptr);
if (!mpImplementation->mpPdfDocument)
{
//TODO: Handle failure to load.
switch (FPDF_GetLastError())
{
case FPDF_ERR_SUCCESS:
break;
case FPDF_ERR_UNKNOWN:
break;
case FPDF_ERR_FILE:
break;
case FPDF_ERR_FORMAT:
break;
case FPDF_ERR_PASSWORD:
break;
case FPDF_ERR_SECURITY:
break;
case FPDF_ERR_PAGE:
break;
default:
break;
}
return false;
}
sal_Int32 nPageIndex = std::max(rData->getPageIndex(), sal_Int32(0));
mpSearchContext.reset(new SearchContext(mpImplementation->mpPdfDocument, nPageIndex,
rSearchString, eStartPosition));
return mpSearchContext->initialize();
}
basegfx::B2DSize VectorGraphicSearch::pageSize()
{
basegfx::B2DSize aSize;
if (mpSearchContext)
aSize = mpSearchContext->getPageSize();
return aSize;
}
bool VectorGraphicSearch::next()
{
if (mpSearchContext)
return mpSearchContext->next();
return false;
}
bool VectorGraphicSearch::previous()
{
if (mpSearchContext)
return mpSearchContext->previous();
return false;
}
int VectorGraphicSearch::index()
{
if (mpSearchContext)
return mpSearchContext->index();
return -1;
}
std::vector<basegfx::B2DRectangle> VectorGraphicSearch::getTextRectangles()
{
if (mpSearchContext)
return mpSearchContext->getTextRectangles();
return std::vector<basegfx::B2DRectangle>();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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