ECode FileBackupHelper::RestoreEntity(
/* [in] */ IBackupDataInputStream* data)
{
//if (DEBUG) Log.d(TAG, "got entity '" + data.getKey() + "' size=" + data.size());
assert(data != NULL);
String key;
data->GetKey(&key);
if (IsKeyInList(key, mFiles)) {
AutoPtr<IFile> f;
CFile::New(mFilesDir, key, (IFile**) &f);
WriteFile(f, data);
}
return NOERROR;
}
/**
* Restore one absolute file entity from the restore stream. If we're restoring the
* magic wallpaper file, take specific action to determine whether it is suitable for
* the current device.
*/
ECode CWallpaperBackupHelper::RestoreEntity(
/* [in] */ IBackupDataInputStream *data)
{
String key;
data->GetKey(&key);
if (IsKeyInList(key, mKeys)) {
if (key.Equals(WALLPAPER_IMAGE_KEY)) {
// restore the file to the stage for inspection
AutoPtr<IFile> f;
CFile::New(GetSTAGE_FILE(), (IFile**)&f);
if (WriteFile(f, data)) {
// Preflight the restored image's dimensions without loading it
AutoPtr<IBitmapFactoryOptions> options;
ASSERT_SUCCEEDED(CBitmapFactoryOptions::New((IBitmapFactoryOptions**)&options));
options->SetInJustDecodeBounds(TRUE);
AutoPtr<IBitmapFactory> factory;
ASSERT_SUCCEEDED(CBitmapFactory::AcquireSingleton((IBitmapFactory**)&factory));
AutoPtr<IBitmap> bm;
ASSERT_SUCCEEDED(factory->DecodeFile(GetSTAGE_FILE(), options, (IBitmap**)&bm));
Int32 w, h;
options->GetOutWidth(&w);
options->GetOutHeight(&h);
if (DEBUG) {
Slogger::D(TAG, "Restoring wallpaper image w=%d, h=%d",w, h);
}
// How much does the image differ from our preference? The threshold
// here is set to accept any image larger than our target, because
// scaling down is acceptable; but to reject images that are deemed
// "too small" to scale up attractively. The value 1.33 is just barely
// too low to pass Nexus 1 or Droid wallpapers for use on a Xoom, but
// will pass anything relatively larger.
Double widthRatio = mDesiredMinWidth / w;
Double heightRatio = mDesiredMinHeight / h;
if (widthRatio > 0 && widthRatio < 1.33
&& heightRatio > 0 && heightRatio < 1.33) {
// sufficiently close to our resolution; go ahead and use it
if (DEBUG) Slogger::D(TAG, "wallpaper dimension match; using");
AutoPtr<IFile> file;
CFile::New(GetWALLPAPER_IMAGE(), (IFile**)&file);
Boolean b;
f->RenameTo(file, &b);
// TODO: spin a service to copy the restored image to sd/usb storage,
// since it does not exist anywhere other than the private wallpaper
// file.
} else {
if (DEBUG) {
Slogger::D(TAG, "dimensions too far off: wr=%lu, hr=%lu", widthRatio, heightRatio);
Boolean b;
f->Delete(&b);
}
}
}
} else if (key.Equals(WALLPAPER_INFO_KEY)) {
// XML file containing wallpaper info
AutoPtr<IFile> file;
CFile::New(GetWALLPAPER_INFO(), (IFile**)&file);
WriteFile(file, data);
}
}
return NOERROR;
}
