src/TortoiseShell/ItemIDList.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2003-2006, 2009, 2011-2013 - TortoiseSVN
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 #include "stdafx.h"
  20 #include "ShellExt.h"
  21 #include "ItemIDList.h"
  22
  23
  24 ItemIDList::ItemIDList(PCUITEMID_CHILD item, PCUIDLIST_RELATIVE parent)
  25         : item_ (item)
  26         , parent_ (parent)
  27         , count_ (-1)
  28 {
  29 }
  30
  31 ItemIDList::ItemIDList(PCIDLIST_ABSOLUTE item)
  32         : item_((PCUITEMID_CHILD)item)
  33         , parent_(0)
  34         , count_(-1)
  35 {
  36 }
  37
  38 ItemIDList::~ItemIDList()
  39 {
  40 }
  41
  42 int ItemIDList::size() const
  43 {
  44         if (count_ == -1)
  45         {
  46                 count_ = 0;
  47                 if (item_)
  48                 {
  49                         LPCSHITEMID ptr = &item_->mkid;
  50                         while (ptr != 0 && ptr->cb != 0)
  51                         {
  52                                 ++count_;
  53                                 LPBYTE byte = (LPBYTE) ptr;
  54                                 byte += ptr->cb;
  55                                 ptr = (LPCSHITEMID) byte;
  56                         }
  57                 }
  58         }
  59         return count_;
  60 }
  61
  62 LPCSHITEMID ItemIDList::get(int index) const
  63 {
  64         int count = 0;
  65
  66         if (item_ == NULL)
  67                 return NULL;
  68         LPCSHITEMID ptr = &item_->mkid;
  69         if (ptr == NULL)
  70                 return NULL;
  71         while (ptr->cb != 0)
  72         {
  73                 if (count == index)
  74                         break;
  75
  76                 ++count;
  77                 LPBYTE byte = (LPBYTE) ptr;
  78                 byte += ptr->cb;
  79                 ptr = (LPCSHITEMID) byte;
  80         }
  81         return ptr;
  82
  83 }
  84
  85 tstring ItemIDList::toString(bool resolveLibraries /*= true*/)
  86 {
  87         CComPtr<IShellFolder> shellFolder;
  88         CComPtr<IShellFolder> parentFolder;
  89         tstring ret;
  90
  91         HRESULT hr = ::SHGetDesktopFolder(&shellFolder);
  92         if (FAILED(hr))
  93                 return ret;
  94         if (parent_)
  95         {
  96                 hr = shellFolder->BindToObject(parent_, 0, IID_IShellFolder, (void**) &parentFolder);
  97                 if (FAILED(hr))
  98                         parentFolder = shellFolder;
  99         }
 100         else
 101         {
 102                 parentFolder = shellFolder;
 103         }
 104
 105         STRRET name;
 106         TCHAR * szDisplayName = NULL;
 107         if ((parentFolder != 0)&&(item_ != 0))
 108         {
 109                 hr = parentFolder->GetDisplayNameOf(item_, SHGDN_NORMAL | SHGDN_FORPARSING, &name);
 110                 if (FAILED(hr))
 111                         return ret;
 112                 hr = StrRetToStr (&name, item_, &szDisplayName);
 113                 if (FAILED(hr))
 114                         return ret;
 115         }
 116         if (szDisplayName == NULL)
 117         {
 118                 return ret;
 119         }
 120         ret = szDisplayName;
 121         CoTaskMemFree(szDisplayName);
 122         if ((resolveLibraries) &&
 123                 (_tcsncmp(ret.c_str(), _T("::{"), 3)==0))
 124         {
 125                 CComPtr<IShellLibrary> plib;
 126                 HRESULT hr = CoCreateInstance(CLSID_ShellLibrary,
 127                                                                           NULL,
 128                                                                           CLSCTX_INPROC_SERVER,
 129                                                                           IID_PPV_ARGS(&plib));
 130                 if (SUCCEEDED(hr))
 131                 {
 132                         typedef HRESULT STDAPICALLTYPE SHCreateItemFromParsingNameFN(__in PCWSTR pszPath, __in_opt IBindCtx *pbc, __in REFIID riid, __deref_out void **ppv);
 133                         CAutoLibrary hShell = AtlLoadSystemLibraryUsingFullPath(_T("shell32.dll"));
 134                         if (hShell)
 135                         {
 136                                 SHCreateItemFromParsingNameFN *pfnSHCreateItemFromParsingName = (SHCreateItemFromParsingNameFN*)GetProcAddress(hShell, "SHCreateItemFromParsingName");
 137                                 if (pfnSHCreateItemFromParsingName)
 138                                 {
 139                                         CComPtr<IShellItem> psiLibrary;
 140                                         hr = pfnSHCreateItemFromParsingName(ret.c_str(), NULL, IID_PPV_ARGS(&psiLibrary));
 141                                         if (SUCCEEDED(hr))
 142                                         {
 143                                                 hr = plib->LoadLibraryFromItem(psiLibrary, STGM_READ|STGM_SHARE_DENY_NONE);
 144                                                 if (SUCCEEDED(hr))
 145                                                 {
 146                                                         CComPtr<IShellItem> psiSaveLocation;
 147                                                         hr = plib->GetDefaultSaveFolder(DSFT_DETECT, IID_PPV_ARGS(&psiSaveLocation));
 148                                                         if (SUCCEEDED(hr))
 149                                                         {
 150                                                                 PWSTR pszName = NULL;
 151                                                                 hr = psiSaveLocation->GetDisplayName(SIGDN_FILESYSPATH, &pszName);
 152                                                                 if (SUCCEEDED(hr))
 153                                                                 {
 154                                                                         ret = pszName;
 155                                                                         CoTaskMemFree(pszName);
 156                                                                 }
 157                                                         }
 158                                                 }
 159                                         }
 160                                 }
 161                         }
 162                 }
 163         }
 164         return ret;
 165 }
 166
 167 PCUITEMID_CHILD ItemIDList::operator& ()
 168 {
 169         return item_;
 170 }