// TnzQt includes

#include "toonzqt/menubarcommand.h"

#include "toonzqt/viewcommandids.h"

#include "toonzqt/imageutils.h"

#include "toonzqt/dvdialog.h"

#include "toonzqt/gutil.h"

// TnzLib includes

#include "toonz/preferences.h"

#include "toonz/namebuilder.h"

#include "toonz/toonzscene.h"

#include "toonz/tproject.h"

#include "toonz/Naa2TlvConverter.h"

#ifdef _WIN32

#include "avicodecrestrictions.h"

#endif

// TnzCore includes

#include "tsystem.h"

#include "tfilepath_io.h"

#include "timage_io.h"

#include "tlevel.h"

#include "tlevel_io.h"

#include "tpalette.h"

#include "tropcm.h"

#include "trasterimage.h"

#include "tvectorrenderdata.h"

#include "tofflinegl.h"

#include "tconvert.h"

#include "trop.h"

#include "timageinfo.h"

#include "tfiletype.h"

#include "tfilepath.h"

#include "ttoonzimage.h"

#include "trasterimage.h"

#include "tvectorimage.h"

#include "tstroke.h"

// TnzQt includes

#include <qapplication></qapplication>

// boost includes

#include <boost iterator="" transform_iterator.hpp=""></boost>

//**********************************************************************************

//    Local namespace  stuff

//**********************************************************************************

namespace {

void addOverlappedRegions(TRegion *reg, std::vector<tfilledregioninf> ®Inf) {</tfilledregioninf>

  regInf.push_back(TFilledRegionInf(reg->getId(), reg->getStyle()));

  UINT regNum = reg->getSubregionCount();

  for (UINT i = 0; i < regNum; i++)

    addOverlappedRegions(reg->getSubregion(i), regInf);

}

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

void addRegionsInArea(TRegion *reg, std::vector<tfilledregioninf> ®s,</tfilledregioninf>

                      const TRectD &area) {

  if (area.contains(reg->getBBox()))

    regs.push_back(TFilledRegionInf(reg->getId(), reg->getStyle()));

  if (reg->getBBox().overlaps(area)) {

    UINT regNum = reg->getSubregionCount();

    for (UINT i = 0; i < regNum; i++)

      addRegionsInArea(reg->getSubregion(i), regs, area);

  }

}

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

void getFrameIds(TFrameId from, TFrameId to, const TLevelP &level,

                 std::vector<tframeid> &frames) {</tframeid>

  struct locals {

    static inline TFrameId getFrame(const TLevel::Table::value_type &pair) {

      return pair.first;

    }

  };  // locals

  if (from.isEmptyFrame()) from = TFrameId(-(std::numeric_limits<int>::max)());</int>

  if (to.isEmptyFrame()) to = TFrameId((std::numeric_limits<int>::max)());</int>

  if (from > to) tswap(from, to);

  const TLevel::Table &table = *level->getTable();

  TLevel::Table::const_iterator lBegin = table.lower_bound(from),

                                lEnd   = table.upper_bound(to);

  assert(frames.empty());

  frames.insert(frames.end(),

                boost::make_transform_iterator(lBegin, locals::getFrame),

                boost::make_transform_iterator(lEnd, locals::getFrame));

}

}  // namespace

//**********************************************************************************

//    ImageUtils namespace  stuff

//**********************************************************************************

namespace ImageUtils {

// todo: spostare da qualche altra parte. rendere accessibile a tutti.

// utilizzare

// anche nella libreria dovunque si usi direttamente "_files"

static TFilePath getResourceFolder(const TFilePath &scenePath) {

  return scenePath.getParentDir() + (scenePath.getName() + "_files");

}

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

static void copyScene(const TFilePath &dst, const TFilePath &src) {

  TSystem::copyFile(dst, src);

  if (TProjectManager::instance()->isTabModeEnabled())

    TSystem::copyDir(getResourceFolder(dst), getResourceFolder(src));

  TFilePath srcIcon = ToonzScene::getIconPath(src);

  if (TFileStatus(srcIcon).doesExist()) {

    TFilePath dstIcon = ToonzScene::getIconPath(dst);

    TSystem::copyFile(dstIcon, srcIcon);

  }

}

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

TFilePath duplicate(const TFilePath &levelPath) {

  if (levelPath == TFilePath()) return TFilePath();

  if (!TSystem::doesExistFileOrLevel(levelPath)) {

    DVGui::warning(

        QObject::tr("It is not possible to find the %1 level.")

            .arg(QString::fromStdWString(levelPath.getWideString())));

    return TFilePath();

  }

  NameBuilder *nameBuilder =

      NameBuilder::getBuilder(::to_wstring(levelPath.getName()));

  std::wstring levelNameOut;

  do

    levelNameOut = nameBuilder->getNext();

  while (TSystem::doesExistFileOrLevel(levelPath.withName(levelNameOut)));

  TFilePath levelPathOut = levelPath.withName(levelNameOut);

  try {

    if (levelPath.getType() == "tnz")

      copyScene(levelPathOut, levelPath);

    else {

      TSystem::copyFileOrLevel_throw(levelPathOut, levelPath);

      if (levelPath.getType() == "tlv") {

        TFilePath pltPath = levelPath.withType("tpl");

        if (TSystem::doesExistFileOrLevel(pltPath))

          TSystem::copyFileOrLevel_throw(levelPathOut.withType("tpl"), pltPath);

      }

    }

  } catch (...) {

    QString msg =

        QObject::tr("There was an error copying %1").arg(toQString(levelPath));

    DVGui::error(msg);

    return TFilePath();

  }

  //  QString msg = QString("Copied ") +

  //                QString::fromStdWString(levelPath.withoutParentDir().getWideString())

  //                +

  //                QString(" to " +

  //                QString::fromStdWString(levelPathOut.withoutParentDir().getWideString()));

  //  DVGui::info(msg);

  return levelPathOut;

}

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

void premultiply(const TFilePath &levelPath) {

  if (levelPath == TFilePath()) return;

  if (!TSystem::doesExistFileOrLevel(levelPath)) {

    DVGui::warning(

        QObject::tr("It is not possible to find the level %1")

            .arg(QString::fromStdWString(levelPath.getWideString())));

    return;

  }

  TFileType::Type type = TFileType::getInfo(levelPath);

  if (type == TFileType::CMAPPED_LEVEL) {

    DVGui::warning(QObject::tr("Cannot premultiply the selected file."));

    return;

  }

  if (type == TFileType::VECTOR_LEVEL || type == TFileType::VECTOR_IMAGE) {

    DVGui::warning(QObject::tr("Cannot premultiply a vector-based level."));

    return;

  }

  if (type != TFileType::RASTER_LEVEL && type != TFileType::RASTER_IMAGE) {

    DVGui::info(QObject::tr("Cannot premultiply the selected file."));

    return;

  }

  try {

    TLevelReaderP lr = TLevelReaderP(levelPath);

    if (!lr) return;

    TLevelP level = lr->loadInfo();

    if (!level || level->getFrameCount() == 0) return;

    bool isMovie = type == TFileType::RASTER_LEVEL;

    /*

if (!isMovie && lr->getImageInfo()->m_samplePerPixel!=4)

{

QMessageBox::information(0, QString("ERROR"), QString("Only rgbm images can be

premultiplied!"));

return;

}

*/

    TLevelWriterP lw;

    if (!isMovie) {

      lw = TLevelWriterP(levelPath);

      if (!lw) return;

    }

    qApp->setOverrideCursor(QCursor(Qt::WaitCursor));

    qApp->processEvents();

    int count           = 0;

    TLevel::Iterator it = level->begin();

    for (; it != level->end(); ++it) {

      TImageReaderP ir = lr->getFrameReader(it->first);

      TRasterImageP rimg = (TRasterImageP)ir->load();

      if (!rimg) continue;

      TRop::premultiply(rimg->getRaster());

      ir = 0;

      if (isMovie)

        level->setFrame(it->first, rimg);

      else {

        TImageWriterP iw = lw->getFrameWriter(it->first);

        iw->save(levelPath.withFrame(it->first), rimg);

        iw = 0;

      }

    }

    lr = TLevelReaderP();

    if (isMovie) {

      TSystem::deleteFile(levelPath);

      lw = TLevelWriterP(levelPath);

      if (!lw) {

        QApplication::restoreOverrideCursor();

        return;

      }

      lw->save(level);

    }

  } catch (...) {

    DVGui::warning(QObject::tr("Cannot premultiply the selected file."));

    QApplication::restoreOverrideCursor();

    return;

  }

  QApplication::restoreOverrideCursor();

  QString msg = QObject::tr("Level %1 premultiplied.")

                    .arg(QString::fromStdString(levelPath.getLevelName()));

  DVGui::info(msg);

}

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

void getFillingInformationOverlappingArea(const TVectorImageP &vi,

                                          std::vector<tfilledregioninf> ®Inf,</tfilledregioninf>

                                          const TRectD &area1,

                                          const TRectD &area2) {

  if (!vi->isComputedRegionAlmostOnce()) return;

  assert(area1 != TRectD() || area2 != TRectD());

  vi->findRegions();

  UINT regNum = vi->getRegionCount();

  TRegion *reg;

  for (UINT i = 0; i < regNum; i++) {

    reg = vi->getRegion(i);

    if (reg->getBBox().overlaps(area1) || reg->getBBox().overlaps(area2))

      addOverlappedRegions(reg, regInf);

  }

}

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

void getFillingInformationInArea(const TVectorImageP &vi,

                                 std::vector<tfilledregioninf> ®s,</tfilledregioninf>

                                 const TRectD &area) {

  if (!vi->isComputedRegionAlmostOnce()) return;

  vi->findRegions();

  UINT regNum = vi->getRegionCount();

  for (UINT i = 0; i < regNum; i++)

    addRegionsInArea(vi->getRegion(i), regs, area);

}

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

void assignFillingInformation(TVectorImage &vi,

                              const std::vector<tfilledregioninf> ®s) {</tfilledregioninf>

  vi.findRegions();

  UINT r, rCount = UINT(regs.size());

  for (r = 0; r != rCount; ++r) {

    const TFilledRegionInf &rInfo = regs[r];

    if (TRegion *region = vi.getRegion(rInfo.m_regionId))

      region->setStyle(rInfo.m_styleId);

  }

}

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

void getStrokeStyleInformationInArea(

    const TVectorImageP &vi, std::vector<std::pair<int, int="">> &strokesInfo,</std::pair<int,>

    const TRectD &area) {

  if (!vi->isComputedRegionAlmostOnce()) return;

  vi->findRegions();

  UINT regNum = vi->getStrokeCount();

  for (UINT i = 0; i < vi->getStrokeCount(); i++) {

    if (!vi->inCurrentGroup(i)) continue;

    if (area.contains(vi->getStroke(i)->getBBox()))

      strokesInfo.push_back(

          std::pair<int, int="">(i, vi->getStroke(i)->getStyle()));</int,>

  }

}

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

static void convertFromCM(

    const TLevelReaderP &lr, const TPaletteP &plt, const TLevelWriterP &lw,

    const std::vector<tframeid> &frames, const TAffine &aff,</tframeid>

    const TRop::ResampleFilterType &resType, FrameTaskNotifier *frameNotifier,

    const TPixel &bgColor, bool removeDotBeforeFrameNumber = false) {

  for (int i = 0; i < (int)frames.size(); i++) {

    if (frameNotifier->abortTask()) break;

    try {

      TImageReaderP ir = lr->getFrameReader(frames[i]);

      TImageP img      = ir->load();

      TToonzImageP toonzImage(img);

      double xdpi, ydpi;

      toonzImage->getDpi(xdpi, ydpi);

      assert(toonzImage);

      if (toonzImage) {

        TRasterCM32P rasCMImage = toonzImage->getRaster();

        TRaster32P ras(

            convert(aff * convert(rasCMImage->getBounds())).getSize());

        if (!aff.isIdentity())

          TRop::resample(ras, rasCMImage, plt, aff, resType);

        else

          TRop::convert(ras, rasCMImage, plt);

        if (bgColor != TPixel::Transparent) TRop::addBackground(ras, bgColor);

        TRasterImageP rasImage(ras);

        rasImage->setDpi(xdpi, ydpi);

        /*---

                ConvertPopup

        での指定に合わせて、[レベル名].[フレーム番号].[拡張子]

                のうち、[レベル名]と[フレーム番号]の間のドットを消す。

                例：A.0001.tga → A0001.tga になる。

        ---*/

        if (removeDotBeforeFrameNumber) {

          TFilePath outPath = lw->getFilePath().withFrame(frames[i]);

          /*--- フレーム番号と拡張子の文字数の合計。大抵8 ---*/

          int index               = 4 + 1 + outPath.getType().length();

          std::wstring renamedStr = outPath.getWideString();

          if (renamedStr[renamedStr.length() - index - 1] == L'.')

            renamedStr = renamedStr.substr(0, renamedStr.length() - index - 1) +

                         renamedStr.substr(renamedStr.length() - index, index);

          const TFilePath fp(renamedStr);

          TImageWriterP writer(fp);

          writer->setProperties(lw->getProperties());

          writer->save(rasImage);

        } else {

          TImageWriterP iw = lw->getFrameWriter(frames[i]);

          iw->save(rasImage);

        }

      }

    } catch (...) {

      // QString msg=QObject::tr("Frame %1 : conversion

      // failed!").arg(QString::number(i+1));

      //      DVGui::info(msg);

    }

    /*--

     * これはプログレスバーを進めるものなので、動画番号ではなく、完了したフレームの枚数を投げる

     * --*/

    frameNotifier->notifyFrameCompleted(100 * (i + 1) / frames.size());

  }

}

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

static void convertFromVI(const TLevelReaderP &lr, const TPaletteP &plt,

                          const TLevelWriterP &lw,

                          const std::vector<tframeid> &frames,</tframeid>

                          const TRop::ResampleFilterType &resType, int width,

                          FrameTaskNotifier *frameNotifier) {

  QString msg;

  int i;

  std::vector<tvectorimagep> images;</tvectorimagep>

  TRectD maxBbox;

  for (i = 0; i < (int)frames.size();

       i++) {  // trovo la bbox che possa contenere tutte le immagini

    try {

      TImageReaderP ir  = lr->getFrameReader(frames[i]);

      TVectorImageP img = ir->load();

      images.push_back(img);

      maxBbox += img->getBBox();

    } catch (...) {

      msg = QObject::tr("Frame %1 : conversion failed!")

                .arg(QString::fromStdString(frames[i].expand()));

      DVGui::info(msg);

    }

  }

  maxBbox = maxBbox.enlarge(2);

  TAffine aff;

  if (width)  // calcolo l'affine

    aff   = TScale((double)width / maxBbox.getLx());

  maxBbox = aff * maxBbox;

  for (i = 0; i < (int)images.size(); i++) {

    if (frameNotifier->abortTask()) break;

    try {

      TVectorImageP vectorImage = images[i];

      assert(vectorImage);

      if (vectorImage) {

        // faccio il render dell'immagine

        vectorImage->transform(aff, true);

        const TVectorRenderData rd(TTranslation(-maxBbox.getP00()), TRect(),

                                   plt.getPointer(), 0, true, true);

        TOfflineGL *glContext = new TOfflineGL(convert(maxBbox).getSize());

        glContext->clear(TPixel32::Transparent);

        glContext->draw(vectorImage, rd);

        TRaster32P rasImage = (glContext->getRaster());

        TImageWriterP iw    = lw->getFrameWriter(TFrameId(i + 1));

        iw->save(TRasterImageP(rasImage));

      }

    } catch (...) {

      msg = QObject::tr("Frame %1 : conversion failed!")

                .arg(QString::fromStdString(frames[i].expand()));

      DVGui::info(msg);

    }

    frameNotifier->notifyFrameCompleted(100 * (i + 1) / frames.size());

  }

}

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

static void convertFromFullRaster(

    const TLevelReaderP &lr, const TLevelWriterP &lw,

    const std::vector<tframeid> &_frames, const TAffine &aff,</tframeid>

    const TRop::ResampleFilterType &resType, FrameTaskNotifier *frameNotifier,

    const TPixel &bgColor, bool removeDotBeforeFrameNumber = false) {

  std::vector<tframeid> frames = _frames;</tframeid>

  if (frames.empty() &&

      lr->loadInfo()->getFrameCount() ==

          1)  // e' una immagine singola, non un livello

    frames.push_back(TFrameId());

  for (int i = 0; i < (int)frames.size(); i++) {

    if (frameNotifier->abortTask()) break;

    try {

      TRasterImageP img;

      if (frames[i] == TFrameId())  // immagine singola, non livello

      {

        assert(frames.size() == 1);

        TImageP _img;

        if (!TImageReader::load(lr->getFilePath(), _img)) continue;

        img = _img;

      } else {

        TImageReaderP ir = lr->getFrameReader(frames[i]);

        img              = ir->load();

      }

      TRaster32P raster(convert(aff * img->getBBox()).getSize());

      if (!aff.isIdentity())

        TRop::resample(raster, img->getRaster(), aff, resType);

      else {

        if ((TRaster32P)img->getRaster())

          raster = img->getRaster();

        else

          TRop::convert(raster, img->getRaster());

      }

      if (bgColor != TPixel::Transparent) TRop::addBackground(raster, bgColor);

      TRasterImageP newImg(raster);

      double xDpi, yDpi;

      img->getDpi(xDpi, yDpi);

      if (xDpi == 0 && yDpi == 0)

        xDpi = yDpi = Preferences::instance()->getDefLevelDpi();

      newImg->setDpi(xDpi, yDpi);

      if (frames[i] == TFrameId())

        TImageWriter::save(lw->getFilePath(), newImg);

      else {

        /*---

ConvertPopup での指定に合わせて、[レベル名].[フレーム番号].[拡張子]

のうち、[レベル名]と[フレーム番号]の間のドットを消す。

例：A.0001.tga → A0001.tga になる。

---*/

        if (removeDotBeforeFrameNumber) {

          TFilePath outPath = lw->getFilePath().withFrame(frames[i]);

          /*--- フレーム番号と拡張子の文字数の合計。大抵8 ---*/

          int index               = 4 + 1 + outPath.getType().length();

          std::wstring renamedStr = outPath.getWideString();

          if (renamedStr[renamedStr.length() - index - 1] == L'.')

            renamedStr = renamedStr.substr(0, renamedStr.length() - index - 1) +

                         renamedStr.substr(renamedStr.length() - index, index);

          const TFilePath fp(renamedStr);

          TImageWriterP writer(fp);

          writer->setProperties(lw->getProperties());

          writer->save(newImg);

        } else {

          TImageWriterP iw = lw->getFrameWriter(frames[i]);

          iw->save(newImg);

        }

      }

    } catch (...) {

      // QString msg=QObject::tr("Frame %1 : conversion

      // failed!").arg(QString::number(i+1));

      // DVGui::info(msg);

    }

    /*--

     * これはプログレスバーを進めるものなので、動画番号ではなく、完了したフレームの枚数を投げる

     * --*/

    frameNotifier->notifyFrameCompleted(100 * (i + 1) / frames.size());

  }

}

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

static void convertFromVector(const TLevelReaderP &lr, const TLevelWriterP &lw,

                              const std::vector<tframeid> &_frames,</tframeid>

                              FrameTaskNotifier *frameNotifier) {

  std::vector<tframeid> frames = _frames;</tframeid>

  TLevelP lv                   = lr->loadInfo();

  if (frames.empty() &&

      lv->getFrameCount() == 1)  // e' una immagine singola, non un livello

    frames.push_back(TFrameId());

  for (int i = 0; i < (int)frames.size(); i++) {

    if (frameNotifier->abortTask()) break;

    try {

      TVectorImageP img;

      if (frames[i] == TFrameId())  // immagine singola, non livello

      {

        assert(frames.size() == 1);

        TImageP _img;

        if (!TImageReader::load(lr->getFilePath(), _img)) continue;

        img = _img;

      } else {

        TImageReaderP ir = lr->getFrameReader(frames[i]);

        img              = ir->load();

      }

      img->setPalette(lv->getPalette());

      if (frames[i] == TFrameId())

        TImageWriter::save(lw->getFilePath(), img);

      else {

        TImageWriterP iw = lw->getFrameWriter(frames[i]);

        iw->save(img);

      }

    } catch (...) {

      // QString msg=QObject::tr("Frame %1 : conversion

      // failed!").arg(QString::number(i+1));

      // DVGui::info(msg);

    }

    frameNotifier->notifyFrameCompleted(100 * (i + 1) / frames.size());

  }

}

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

void convert(const TFilePath &source, const TFilePath &dest,

             const TFrameId &from, const TFrameId &to, double framerate,

             TPropertyGroup *prop, FrameTaskNotifier *frameNotifier,

             const TPixel &bgColor, bool removeDotBeforeFrameNumber) {

  std::string dstExt = dest.getType(), srcExt = source.getType();

  // Load source level structure

  TLevelReaderP lr(source);

  TLevelP level = lr->loadInfo();

#ifdef _WIN32

  if (dstExt == "avi") {

    TDimension res(0, 0);

    const TImageInfo *info = lr->getImageInfo(level->begin()->first);

    res.lx                 = info->m_lx;

    res.ly                 = info->m_ly;

    std::string codecName = prop->getProperty(0)->getValueAsString();

    if (!AviCodecRestrictions::canWriteMovie(::to_wstring(codecName), res)) {

      return;

    }

  }

#endif

  // Get the frames available in level inside the [from, to] range

  std::vector<tframeid> frames;</tframeid>

  getFrameIds(from, to, level, frames);

  // Write the destination level

  TLevelWriterP lw(dest, prop);

  lw->setFrameRate(framerate);

  if (srcExt == "tlv")

    convertFromCM(lr, level->getPalette(), lw, frames, TAffine(),

                  TRop::Triangle, frameNotifier, bgColor,

                  removeDotBeforeFrameNumber);

  else if (srcExt == "pli")

    // assert(!"Conversion from pli files is currently diabled");

    convertFromVector(lr, lw, frames, frameNotifier);

  else

    convertFromFullRaster(lr, lw, frames, TAffine(), TRop::Triangle,

                          frameNotifier, bgColor, removeDotBeforeFrameNumber);

}

//=============================================================================

void convertNaa2Tlv(const TFilePath &source, const TFilePath &dest,

                    const TFrameId &from, const TFrameId &to,

                    FrameTaskNotifier *frameNotifier, TPalette *palette,

                    bool removeUnusedStyles) {

  std::string dstExt = dest.getType(), srcExt = source.getType();

  // Load source level structure

  TLevelReaderP lr(source);

  TLevelP level = lr->loadInfo();

  // Get the frames available in level inside the [from, to] range

  std::vector<tframeid> frames;</tframeid>

  getFrameIds(from, to, level, frames);

  if (frames.empty()) return;

  // Write the destination level

  TLevelWriterP lw;  // Initialized just before a sure write

  Naa2TlvConverter converter;

  converter.setPalette(palette);

  QList<int> usedStyleIds({0});</int>

  int f, fCount = int(frames.size());

  for (f = 0; f != fCount; ++f) {

    if (frameNotifier->abortTask()) break;

    try {

      TImageReaderP ir = lr->getFrameReader(frames[f]);

      TImageP img      = ir->load();

      if (!img) continue;

      TRasterImageP ri = img;

      if (!ri) continue;

      TRaster32P raster =

          ri->getRaster();  // Converts only 32-bit images, it seems...

      if (!raster)          //

        continue;           //

      converter.process(raster);

      if (TToonzImageP dstImg =

              converter.makeTlv(false, usedStyleIds))  // Opaque synthetic inks

      {

        if (converter.getPalette() == 0)

          converter.setPalette(dstImg->getPalette());

        if (!lw)  // Initialize output file only on a sure write

          lw = TLevelWriterP(dest);  //

        TImageWriterP iw = lw->getFrameWriter(frames[f]);

        iw->save(dstImg);

      } else {

        DVGui::warning(QObject::tr(

            "The source image seems not suitable for this kind of conversion"));

        frameNotifier->notifyError();

      }

    } catch (...) {

    }

    frameNotifier->notifyFrameCompleted(100 * (f + 1) / frames.size());

  }

  if (removeUnusedStyles) converter.removeUnusedStyles(usedStyleIds);

}

//=============================================================================

#define ZOOMLEVELS 13

#define NOZOOMINDEX 6

double ZoomFactors[ZOOMLEVELS] = {

    0.015625, 0.03125, 0.0625, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64};

double getQuantizedZoomFactor(double zf, bool forward) {

  if (forward && (zf > ZoomFactors[ZOOMLEVELS - 1] ||

                  areAlmostEqual(zf, ZoomFactors[ZOOMLEVELS - 1], 1e-5)))

    return zf;

  else if (!forward &&

           (zf < ZoomFactors[0] || areAlmostEqual(zf, ZoomFactors[0], 1e-5)))

    return zf;

  assert((!forward && zf > ZoomFactors[0]) ||

         (forward && zf < ZoomFactors[ZOOMLEVELS - 1]));

  int i = 0;

  for (i = 0; i <= ZOOMLEVELS - 1; i++)

    if (areAlmostEqual(zf, ZoomFactors[i], 1e-5)) zf = ZoomFactors[i];

  if (forward && zf < ZoomFactors[0])

    return ZoomFactors[0];

  else if (!forward && zf > ZoomFactors[ZOOMLEVELS - 1])

    return ZoomFactors[ZOOMLEVELS - 1];

  for (i = 0; i < ZOOMLEVELS - 1; i++)

    if (ZoomFactors[i + 1] - zf >= 0 && zf - ZoomFactors[i] >= 0) {

      if (forward && ZoomFactors[i + 1] == zf)

        return ZoomFactors[i + 2];

      else if (!forward && ZoomFactors[i] == zf)

        return ZoomFactors[i - 1];

      else

        return forward ? ZoomFactors[i + 1] : ZoomFactors[i];

    }

  return ZoomFactors[NOZOOMINDEX];

}

}  // namespace ImageUtils

namespace {

void getViewerShortcuts(int &zoomIn, int &zoomOut, int &zoomReset, int &zoomFit,

                        int &showHideFullScreen, int &actualPixelSize) {

  CommandManager *cManager = CommandManager::instance();

  zoomIn = cManager->getKeyFromShortcut(cManager->getShortcutFromId(V_ZoomIn));

  zoomOut =

      cManager->getKeyFromShortcut(cManager->getShortcutFromId(V_ZoomOut));

  zoomReset =

      cManager->getKeyFromShortcut(cManager->getShortcutFromId(V_ZoomReset));

  zoomFit =

      cManager->getKeyFromShortcut(cManager->getShortcutFromId(V_ZoomFit));

  showHideFullScreen = cManager->getKeyFromShortcut(

      cManager->getShortcutFromId(V_ShowHideFullScreen));

  actualPixelSize = cManager->getKeyFromShortcut(

      cManager->getShortcutFromId(V_ActualPixelSize));

}

}  // namespace

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

namespace ImageUtils {

ShortcutZoomer::ShortcutZoomer(QWidget *zoomingWidget)

    : m_widget(zoomingWidget) {}

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

bool ShortcutZoomer::exec(QKeyEvent *event) {

  int zoomInKey, zoomOutKey, zoomResetKey, zoomFitKey, showHideFullScreenKey,

      actualPixelSize;

  getViewerShortcuts(zoomInKey, zoomOutKey, zoomResetKey, zoomFitKey,

                     showHideFullScreenKey, actualPixelSize);

  int key = event->key();

  if (key == Qt::Key_Control || key == Qt::Key_Shift || key == Qt::Key_Alt)

    return false;

  key =

      key |

      event->modifiers() & (~0xf0000000);  // Ignore if the key is a numpad key

  return (key == showHideFullScreenKey)

             ? toggleFullScreen()

             : (key == Qt::Key_Escape)

                   ? toggleFullScreen(true)

                   : (key == actualPixelSize)

                         ? setActualPixelSize()

                         : (key == zoomFitKey)

                               ? fit()

                               : (key == zoomInKey || key == zoomOutKey ||

                                  key == zoomResetKey)

                                     ? zoom(key == zoomInKey,

                                            key == zoomResetKey)

                                     : false;

}

//*********************************************************************************************

//    FullScreenWidget  implementation

//*********************************************************************************************

FullScreenWidget::FullScreenWidget(QWidget *parent) : QWidget(parent) {

  QHBoxLayout *layout = new QHBoxLayout(this);

  layout->setMargin(0);

  layout->setSpacing(0);

  setLayout(layout);

}

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

void FullScreenWidget::setWidget(QWidget *widget) {

  QLayout *layout = this->layout();

  delete layout->takeAt(0);

  if ((m_widget = widget)) layout->addWidget(m_widget);

}

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

bool FullScreenWidget::toggleFullScreen(bool quit) {

  if (windowState() & Qt::WindowFullScreen) {

    hide();

    setWindowFlags(windowFlags() & ~(Qt::Window | Qt::WindowStaysOnTopHint));

    showNormal();

    setContentsMargins(0, 0, 0, 0);  // ...

    m_widget->setFocus();

    return true;

  } else if (!quit) {

    setContentsMargins(0, 0, 1, 1);  // QTBUG #7556

    setWindowFlags(windowFlags() | Qt::Window | Qt::WindowStaysOnTopHint);

    showFullScreen();

    return true;

  }

  return false;

}

}  // imageutils