void SaveThumbnail(DisplayState& ds)
{
if (!ds.thumbnail)
return;
ScopedMem<WCHAR> bmpPath(GetThumbnailPath(ds.filePath));
if (!bmpPath)
return;
ScopedMem<WCHAR> thumbsPath(path::GetDir(bmpPath));
if (dir::Create(thumbsPath))
SaveRenderedBitmap(ds.thumbnail, bmpPath);
}
void SaveThumbnail(DisplayState& ds) {
if (!ds.thumbnail) {
return;
}
AutoFreeW bmpPath(GetThumbnailPath(ds.filePath));
if (!bmpPath) {
return;
}
AutoFreeW thumbsPath(path::GetDir(bmpPath));
if (dir::Create(thumbsPath)) {
CrashIf(!str::EndsWithI(bmpPath, L".png"));
Bitmap bmp(ds.thumbnail->GetBitmap(), nullptr);
CLSID tmpClsid = GetEncoderClsid(L"image/png");
bmp.Save(bmpPath.Get(), &tmpClsid, nullptr);
}
}
// TODO: create in TEMP directory instead?
static WCHAR *GetThumbnailPath(const WCHAR *filePath)
{
// create a fingerprint of a (normalized) path for the file name
// I'd have liked to also include the file's last modification time
// in the fingerprint (much quicker than hashing the entire file's
// content), but that's too expensive for files on slow drives
unsigned char digest[16];
ScopedMem<char> pathU(str::conv::ToUtf8(filePath));
if (path::HasVariableDriveLetter(filePath))
pathU[0] = '?'; // ignore the drive letter, if it might change
CalcMD5Digest((unsigned char *)pathU.Get(), str::Len(pathU), digest);
ScopedMem<char> fingerPrint(str::MemToHex(digest, 16));
ScopedMem<WCHAR> thumbsPath(AppGenDataFilename(THUMBNAILS_DIR_NAME));
if (!thumbsPath)
return NULL;
ScopedMem<WCHAR> fname(str::conv::FromAnsi(fingerPrint));
return str::Format(L"%s\\%s.png", thumbsPath, fname);
}
// removes thumbnails that don't belong to any frequently used item in file history
void CleanUpThumbnailCache(FileHistory& fileHistory)
{
ScopedMem<WCHAR> thumbsPath(AppGenDataFilename(THUMBNAILS_DIR_NAME));
if (!thumbsPath)
return;
ScopedMem<WCHAR> pattern(path::Join(thumbsPath, L"*.png"));
WStrVec files;
WIN32_FIND_DATA fdata;
HANDLE hfind = FindFirstFile(pattern, &fdata);
if (INVALID_HANDLE_VALUE == hfind)
return;
do {
if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
files.Append(str::Dup(fdata.cFileName));
} while (FindNextFile(hfind, &fdata));
FindClose(hfind);
Vec<DisplayState *> list;
fileHistory.GetFrequencyOrder(list);
for (size_t i = 0; i < list.Count() && i < FILE_HISTORY_MAX_FREQUENT * 2; i++) {
ScopedMem<WCHAR> bmpPath(GetThumbnailPath(list.At(i)->filePath));
if (!bmpPath)
continue;
int idx = files.Find(path::GetBaseName(bmpPath));
if (idx != -1) {
CrashIf(idx < 0 || files.Count() <= (size_t)idx);
WCHAR *fileName = files.At(idx);
files.RemoveAt(idx);
free(fileName);
}
}
for (size_t i = 0; i < files.Count(); i++) {
ScopedMem<WCHAR> bmpPath(path::Join(thumbsPath, files.At(i)));
file::Delete(bmpPath);
}
}
// TODO: create in TEMP directory instead?
static WCHAR* GetThumbnailPath(const WCHAR* filePath) {
// create a fingerprint of a (normalized) path for the file name
// I'd have liked to also include the file's last modification time
// in the fingerprint (much quicker than hashing the entire file's
// content), but that's too expensive for files on slow drives
unsigned char digest[16];
// TODO: why is this happening? Seen in crash reports e.g. 35043
if (!filePath)
return nullptr;
OwnedData pathU(str::conv::ToUtf8(filePath));
if (!pathU.Get())
return nullptr;
if (path::HasVariableDriveLetter(filePath))
pathU.Get()[0] = '?'; // ignore the drive letter, if it might change
CalcMD5Digest((unsigned char*)pathU.Get(), str::Len(pathU.Get()), digest);
AutoFree fingerPrint(_MemToHex(&digest));
AutoFreeW thumbsPath(AppGenDataFilename(THUMBNAILS_DIR_NAME));
if (!thumbsPath)
return nullptr;
AutoFreeW fname(str::conv::FromAnsi(fingerPrint));
return str::Format(L"%s\\%s.png", thumbsPath.Get(), fname.Get());
}
