C++ UString::DeleteBack方法代码示例

void ConvertToOSName2(UString &name)
{
  if (!name.IsEmpty())
  {
    name.Replace(kDirDelimiter, kOSDirDelimiter);
    if (name.Back() == kOSDirDelimiter)
      name.DeleteBack();
  }
}

void CPanel::OpenParentFolder()
{
  LoadFullPath(); // Maybe we don't need it ??
  UString focucedName;
  if (!_currentFolderPrefix.IsEmpty() &&
      _currentFolderPrefix.Back() == WCHAR_PATH_SEPARATOR)
  {
    focucedName = _currentFolderPrefix;
    focucedName.DeleteBack();
    if (focucedName != L"\\\\.")
    {
      int pos = focucedName.ReverseFind(WCHAR_PATH_SEPARATOR);
      if (pos >= 0)
        focucedName = focucedName.Mid(pos + 1);
    }
  }

  CDisableTimerProcessing disableTimerProcessing1(*this);
  CMyComPtr<IFolderFolder> newFolder;
  _folder->BindToParentFolder(&newFolder);
  if (newFolder)
    _folder = newFolder;
  else
  {
    if (_parentFolders.IsEmpty())
    {
      SetToRootFolder();
      if (focucedName.IsEmpty())
        focucedName = GetItemName(0);
    }
    else
    {
      _folder.Release();
      _library.Free();
      CFolderLink &link = _parentFolders.Back();
      _folder = link.ParentFolder;
      _library.Attach(link.Library.Detach());
      focucedName = link.ItemName;
      if (_parentFolders.Size() > 1)
        OpenParentArchiveFolder();
      _parentFolders.DeleteBack();
      if (_parentFolders.IsEmpty())
        _flatMode = _flatModeForDisk;
    }
  }

  UStringVector selectedItems;
  /*
  if (!focucedName.IsEmpty())
    selectedItems.Add(focucedName);
  */
  LoadFullPath();
  // ::SetCurrentDirectory(::_currentFolderPrefix);
  RefreshListCtrl(focucedName, -1, true, selectedItems);
  _listView.EnsureVisible(_listView.GetFocusedItem(), false);
  RefreshStatusBar();
}

UString GetOSName2(const UString &name)
{
  if (name.IsEmpty())
    return UString();
  UString newName = GetOSName(name);
  if (newName.Back() == kOSDirDelimiter)
    newName.DeleteBack();
  return newName;
}

static void AddName(UStringVector &strings, UString &s)
{
  s.Trim();
  if (s.Len() >= 2 && s[0] == kQuoteChar && s.Back() == kQuoteChar)
  {
    s.DeleteBack();
    s.Delete(0);
  }
  if (!s.IsEmpty())
    strings.Add(s);
}

HRESULT SetProperties(IUnknown *unknown, const CObjectVector<CProperty> &properties)
{
  if (properties.IsEmpty())
    return S_OK;
  CMyComPtr<ISetProperties> setProperties;
  unknown->QueryInterface(IID_ISetProperties, (void **)&setProperties);
  if (!setProperties)
    return S_OK;

  UStringVector realNames;
  CPropVariant *values = new CPropVariant[properties.Size()];
  try
  {
    int i;
    for(i = 0; i < properties.Size(); i++)
    {
      const CProperty &property = properties[i];
      NCOM::CPropVariant propVariant;
      UString name = property.Name;
      if (property.Value.IsEmpty())
      {
        if (!name.IsEmpty())
        {
          wchar_t c = name.Back();
          if (c == L'-')
            propVariant = false;
          else if (c == L'+')
            propVariant = true;
          if (propVariant.vt != VT_EMPTY)
            name.DeleteBack();
        }
      }
      else
        ParseNumberString(property.Value, propVariant);
      realNames.Add(name);
      values[i] = propVariant;
    }
    CRecordVector<const wchar_t *> names;
    for(i = 0; i < realNames.Size(); i++)
      names.Add((const wchar_t *)realNames[i]);
    
    RINOK(setProperties->SetProperties(&names.Front(), values, names.Size()));
  }
  catch(...)
  {
    delete []values;
    throw;
  }
  delete []values;
  return S_OK;
}

void CPanel::LoadFullPathAndShow()
{
  LoadFullPath();
  _appState->FolderHistory.AddString(_currentFolderPrefix);

  _headerComboBox.SetText(_currentFolderPrefix);

  #ifndef UNDER_CE

  COMBOBOXEXITEM item;
  item.mask = 0;

  UString path = _currentFolderPrefix;
  if (path.Len() >
      #ifdef _WIN32
      3
      #else
      1
      #endif
      && path.Back() == WCHAR_PATH_SEPARATOR)
    path.DeleteBack();

  DWORD attrib = FILE_ATTRIBUTE_DIRECTORY;

  // GetRealIconIndex is slow for direct DVD/UDF path. So we use dummy path
  if (path.IsPrefixedBy(L"\\\\.\\"))
    path = L"_TestFolder_";
  else
  {
    CFileInfo fi;
    if (fi.Find(us2fs(path)))
      attrib = fi.Attrib;
  }
  item.iImage = GetRealIconIndex(us2fs(path), attrib);

  if (item.iImage >= 0)
  {
    item.iSelectedImage = item.iImage;
    item.mask |= (CBEIF_IMAGE | CBEIF_SELECTEDIMAGE);
  }
  item.iItem = -1;
  _headerComboBox.SetItem(&item);
  
  #endif

  RefreshTitle();
}

bool CBrowseDialog::GetParentPath(const UString &path, UString &parentPrefix, UString &name)
{
  parentPrefix.Empty();
  name.Empty();
  if (path.IsEmpty())
    return false;
  if (_topDirPrefix == path)
    return false;
  UString s = path;
  if (s.Back() == WCHAR_PATH_SEPARATOR)
    s.DeleteBack();
  if (s.IsEmpty())
    return false;
  if (s.Back() == WCHAR_PATH_SEPARATOR)
    return false;
  int pos = s.ReverseFind_PathSepar();
  parentPrefix.SetFrom(s, pos + 1);
  name = s.Ptr(pos + 1);
  return true;
}

void CPanel::OpenAltStreams()
{
  CRecordVector<UInt32> indices;
  GetOperatedItemIndices(indices);
  Int32 realIndex = -1;
  if (indices.Size() > 1)
    return;
  if (indices.Size() == 1)
    realIndex = indices[0];

  if (_folderAltStreams)
  {
    CMyComPtr<IFolderFolder> newFolder;
    _folderAltStreams->BindToAltStreams(realIndex, &newFolder);
    if (newFolder)
    {
      CDisableTimerProcessing disableTimerProcessing(*this);
      CDisableNotify disableNotify(*this);
      SetNewFolder(newFolder);
      RefreshListCtrl(UString(), -1, true, UStringVector());
      return;
    }
    return;
  }
  
  #if defined(_WIN32) && !defined(UNDER_CE)
  UString path;
  if (realIndex >= 0)
    path = GetItemFullPath(realIndex);
  else
  {
    path = GetFsPath();
    if (!NName::IsDriveRootPath_SuperAllowed(us2fs(path)))
      if (!path.IsEmpty() && IS_PATH_SEPAR(path.Back()))
        path.DeleteBack();
  }

  path += L':';
  BindToPathAndRefresh(path);
  #endif
}

void CHandler::ParseName(Byte replaceByte, IArchiveOpenCallback *callback)
{
  if (!callback)
    return;
  CMyComPtr<IArchiveOpenVolumeCallback> volumeCallback;
  callback->QueryInterface(IID_IArchiveOpenVolumeCallback, (void **)&volumeCallback);
  if (!volumeCallback)
    return;

  NWindows::NCOM::CPropVariant prop;
  if (volumeCallback->GetProperty(kpidName, &prop) != S_OK || prop.vt != VT_BSTR)
    return;

  UString s = prop.bstrVal;
  if (s.IsEmpty() ||
      s.Back() != L'_')
    return;
  
  s.DeleteBack();
  _name = s;
   
  if (replaceByte == 0)
  {
    if (s.Len() < 3 || s[s.Len() - 3] != '.')
      return;
    for (unsigned i = 0; i < ARRAY_SIZE(g_Exts); i++)
    {
      const char *ext = g_Exts[i];
      if (s[s.Len() - 2] == (Byte)ext[0] &&
          s[s.Len() - 1] == (Byte)ext[1])
      {
        replaceByte = ext[2];
        break;
      }
    }
  }
  
  if (replaceByte >= 0x20 && replaceByte < 0x80)
    _name += (wchar_t)replaceByte;
}

HRESULT CPanel::BindToPath(const UString &fullPath, const UString &arcFormat, bool &archiveIsOpened, bool &encrypted)
{
  UString path = fullPath;
  #ifdef _WIN32
  path.Replace(L'/', WCHAR_PATH_SEPARATOR);
  #endif

  archiveIsOpened = false;
  encrypted = false;
  
  CDisableTimerProcessing disableTimerProcessing(*this);
  CDisableNotify disableNotify(*this);

  for (; !_parentFolders.IsEmpty(); CloseOneLevel())
  {
    // ---------- we try to use open archive ----------

    const CFolderLink &link = _parentFolders.Back();
    const UString &virtPath = link.VirtualPath;
    if (!path.IsPrefixedBy(virtPath))
      continue;
    UString relatPath = path.Ptr(virtPath.Len());
    if (!relatPath.IsEmpty())
    {
      if (!IS_PATH_SEPAR(relatPath[0]))
        continue;
      else
        relatPath.Delete(0);
    }
    
    UString relatPath2 = relatPath;
    if (!relatPath2.IsEmpty() && !IS_PATH_SEPAR(relatPath2.Back()))
      relatPath2.Add_PathSepar();

    for (;;)
    {
      const UString foldPath = GetFolderPath(_folder);
      if (relatPath2 == foldPath)
        break;
      if (relatPath.IsPrefixedBy(foldPath))
      {
        path = relatPath.Ptr(foldPath.Len());
        break;
      }
      CMyComPtr<IFolderFolder> newFolder;
      if (_folder->BindToParentFolder(&newFolder) != S_OK)
        throw 20140918;
      if (!newFolder) // we exit from loop above if (relatPath.IsPrefixedBy(empty path for root folder)
        throw 20140918;
      SetNewFolder(newFolder);
    }
    break;
  }

  if (_parentFolders.IsEmpty())
  {
    // ---------- we open file or folder from file system ----------

    CloseOpenFolders();
    UString sysPath = path;
    
    unsigned prefixSize = NName::GetRootPrefixSize(sysPath);
    if (prefixSize == 0 || sysPath[prefixSize] == 0)
      sysPath.Empty();
    
    #if defined(_WIN32) && !defined(UNDER_CE)
    if (!sysPath.IsEmpty() && sysPath.Back() == ':' &&
      (sysPath.Len() != 2 || !NName::IsDrivePath2(sysPath)))
    {
      UString baseFile = sysPath;
      baseFile.DeleteBack();
      if (NFind::DoesFileOrDirExist(us2fs(baseFile)))
        sysPath.Empty();
    }
    #endif
    
    CFileInfo fileInfo;
    
    while (!sysPath.IsEmpty())
    {
      if (fileInfo.Find(us2fs(sysPath)))
        break;
      int pos = sysPath.ReverseFind_PathSepar();
      if (pos < 0)
        sysPath.Empty();
      else
      {
        /*
        if (reducedParts.Size() > 0 || pos < (int)sysPath.Len() - 1)
          reducedParts.Add(sysPath.Ptr(pos + 1));
        */
        #if defined(_WIN32) && !defined(UNDER_CE)
        if (pos == 2 && NName::IsDrivePath2(sysPath) && sysPath.Len() > 3)
          pos++;
        #endif

        sysPath.DeleteFrom(pos);
      }
    }
    
//.........这里部分代码省略.........

void CPanel::OpenParentFolder()
{
  LoadFullPath(); // Maybe we don't need it ??
  
  UString parentFolderPrefix;
  UString focusedName;
  
  if (!_currentFolderPrefix.IsEmpty())
  {
    wchar_t c = _currentFolderPrefix.Back();
    if (c == WCHAR_PATH_SEPARATOR || c == ':')
    {
      focusedName = _currentFolderPrefix;
      focusedName.DeleteBack();
      /*
      if (c == ':' && !focusedName.IsEmpty() && focusedName.Back() == WCHAR_PATH_SEPARATOR)
      {
        focusedName.DeleteBack();
      }
      else
      */
      if (focusedName != L"\\\\." &&
          focusedName != L"\\\\?")
      {
        int pos = focusedName.ReverseFind_PathSepar();
        if (pos >= 0)
        {
          parentFolderPrefix = focusedName;
          parentFolderPrefix.DeleteFrom(pos + 1);
          focusedName.DeleteFrontal(pos + 1);
        }
      }
    }
  }

  CDisableTimerProcessing disableTimerProcessing(*this);
  CDisableNotify disableNotify(*this);
  
  CMyComPtr<IFolderFolder> newFolder;
  _folder->BindToParentFolder(&newFolder);

  // newFolder.Release(); // for test
  
  if (newFolder)
    SetNewFolder(newFolder);
  else
  {
    bool needSetFolder = true;
    if (!_parentFolders.IsEmpty())
    {
      {
        const CFolderLink &link = _parentFolders.Back();
        parentFolderPrefix = link.ParentFolderPath;
        focusedName = link.RelPath;
      }
      CloseOneLevel();
      needSetFolder = (!_folder);
    }
    
    if (needSetFolder)
    {
      {
        bool archiveIsOpened;
        bool encrypted;
        BindToPath(parentFolderPrefix, UString(), archiveIsOpened, encrypted);
      }
    }
  }
    
  UStringVector selectedItems;
  /*
  if (!focusedName.IsEmpty())
    selectedItems.Add(focusedName);
  */
  LoadFullPath();
  // ::SetCurrentDirectory(::_currentFolderPrefix);
  RefreshListCtrl(focusedName, -1, true, selectedItems);
  // _listView.EnsureVisible(_listView.GetFocusedItem(), false);
}

// Make sure the path is terminated with only a single /
void FixPathFormat(UString& path)
{
	while (path.Back() == L'/') path.DeleteBack();
	path += L'/';
}

STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
{
  COM_TRY_BEGIN
  NCOM::CPropVariant prop;
  if (index >= (UInt32)_archive.Refs.Size())
  {
    index -= _archive.Refs.Size();
    const CBootInitialEntry &be = _archive.BootEntries[index];
    switch (propID)
    {
      case kpidPath:
      {
        AString s = "[BOOT]" STRING_PATH_SEPARATOR;
        if (_archive.BootEntries.Size() != 1)
        {
          char temp[16];
          ConvertUInt32ToString(index + 1, temp);
          s += temp;
          s += '-';
        }
        s += be.GetName();
        prop = s;
        break;
      }
      case kpidIsDir: prop = false; break;
      case kpidSize:
      case kpidPackSize:
        prop = (UInt64)_archive.GetBootItemSize(index);
        break;
    }
  }
  else
  {
    const CRef &ref = _archive.Refs[index];
    const CDir &item = ref.Dir->_subItems[ref.Index];
    switch (propID)
    {
      case kpidPath:
        // if (item.FileId.GetCapacity() >= 0)
        {
          UString s;
          if (_archive.IsJoliet())
            item.GetPathU(s);
          else
            s = MultiByteToUnicodeString(item.GetPath(_archive.IsSusp, _archive.SuspSkipSize), CP_OEMCP);

          if (s.Len() >= 2 && s[s.Len() - 2] == ';' && s.Back() == '1')
            s.DeleteFrom(s.Len() - 2);
          
          if (!s.IsEmpty() && s.Back() == L'.')
            s.DeleteBack();

          NItemName::ConvertToOSName2(s);
          prop = s;
        }
        break;
      case kpidIsDir: prop = item.IsDir(); break;
      case kpidSize:
      case kpidPackSize:
        if (!item.IsDir())
          prop = (UInt64)ref.TotalSize;
        break;
      case kpidMTime:
      {
        FILETIME utc;
        if (item.DateTime.GetFileTime(utc))
          prop = utc;
        break;
      }
    }
  }
  prop.Detach(value);
  return S_OK;
  COM_TRY_END
}

STDMETHODIMP CFSDrives::CopyTo(const UInt32 *indices, UInt32 numItems,
                               const wchar_t *path, IFolderOperationsExtractCallback *callback)
{
    if (numItems == 0)
        return S_OK;

    if (!_volumeMode)
        return E_NOTIMPL;

    UInt64 totalSize = 0;
    UInt32 i;
    for (i = 0; i < numItems; i++)
    {
        const CDriveInfo &di = _drives[indices[i]];
        if (di.KnownSizes)
            totalSize += di.DriveSize;
    }
    RINOK(callback->SetTotal(totalSize));
    RINOK(callback->SetNumFiles(numItems));

    UString destPath = path;
    if (destPath.IsEmpty())
        return E_INVALIDARG;
    bool directName = (destPath.Back() != WCHAR_PATH_SEPARATOR);
    if (directName)
    {
        if (numItems > 1)
            return E_INVALIDARG;
    }

    UInt64 completedSize = 0;
    RINOK(callback->SetCompleted(&completedSize));
    for (i = 0; i < numItems; i++)
    {
        int index = indices[i];
        const CDriveInfo &di = _drives[index];
        UString destPath2 = destPath;
        UString name = fs2us(di.Name);
        if (!directName)
        {
            UString destName = name;
            if (!destName.IsEmpty() && destName.Back() == L':')
            {
                destName.DeleteBack();
                destName += GetExt(index);
            }
            destPath2 += destName;
        }
        FString srcPath = di.GetDeviceFileIoName();

        UInt64 fileSize = 0;
        if (GetLength(index, fileSize) != S_OK)
        {
            return E_FAIL;
        }
        if (!di.KnownSizes)
            totalSize += fileSize;
        RINOK(callback->SetTotal(totalSize));

        Int32 writeAskResult;
        CMyComBSTR destPathResult;
        RINOK(callback->AskWrite(fs2us(srcPath), BoolToInt(false), NULL, &fileSize,
                                 destPath2, &destPathResult, &writeAskResult));
        if (!IntToBool(writeAskResult))
            continue;

        RINOK(callback->SetCurrentFilePath(fs2us(srcPath)));

        static const UInt32 kBufferSize = (4 << 20);
        UInt32 bufferSize = (di.DriveType == DRIVE_REMOVABLE) ? (18 << 10) * 4 : kBufferSize;
        RINOK(CopyFileSpec(srcPath, us2fs(destPathResult), false, fileSize, bufferSize, completedSize, callback));
        completedSize += fileSize;
    }
    return S_OK;
}