/*
* EnumFormatEtc([in] dwDirection, [out] ppenumFormatetc)
* Ownership of ppenumFormatetc transfers from callee to caller so reference count on ppenumFormatetc
* must be incremented before returning. Caller is responsible for releasing ppenumFormatetc.
*/
private int EnumFormatEtc(int dwDirection, long /*int*/ ppenumFormatetc) {
// only allow getting of data - SetData is not currently supported
if (dwDirection == COM.DATADIR_SET) return COM.E_NOTIMPL;
// what types have been registered?
TransferData[] allowedDataTypes = new TransferData[0];
for (int i = 0; i < transferAgents.length; i++) {
Transfer transferAgent = transferAgents[i];
if (transferAgent != null) {
TransferData[] formats = transferAgent.getSupportedTypes();
TransferData[] newAllowedDataTypes =
new TransferData[allowedDataTypes.length + formats.length];
System.arraycopy(allowedDataTypes, 0, newAllowedDataTypes, 0, allowedDataTypes.length);
System.arraycopy(formats, 0, newAllowedDataTypes, allowedDataTypes.length, formats.length);
allowedDataTypes = newAllowedDataTypes;
}
}
OleEnumFORMATETC enumFORMATETC = new OleEnumFORMATETC();
enumFORMATETC.AddRef();
FORMATETC[] formats = new FORMATETC[allowedDataTypes.length];
for (int i = 0; i < formats.length; i++) {
formats[i] = allowedDataTypes[i].formatetc;
}
enumFORMATETC.setFormats(formats);
OS.MoveMemory(ppenumFormatetc, new long /*int*/[] {enumFORMATETC.getAddress()}, OS.PTR_SIZEOF);
return COM.S_OK;
}
private int SetData(long /*int*/ pFormatetc, long /*int*/ pmedium, int fRelease) {
if (pFormatetc == 0 || pmedium == 0) return COM.E_INVALIDARG;
FORMATETC formatetc = new FORMATETC();
COM.MoveMemory(formatetc, pFormatetc, FORMATETC.sizeof);
if (formatetc.cfFormat == CFSTR_PERFORMEDDROPEFFECT && formatetc.tymed == COM.TYMED_HGLOBAL) {
STGMEDIUM stgmedium = new STGMEDIUM();
COM.MoveMemory(stgmedium, pmedium, STGMEDIUM.sizeof);
// TODO - this should be GlobalLock()
long /*int*/[] ptrEffect = new long /*int*/[1];
OS.MoveMemory(ptrEffect, stgmedium.unionField, OS.PTR_SIZEOF);
int[] effect = new int[1];
OS.MoveMemory(effect, ptrEffect[0], 4);
dataEffect = osToOp(effect[0]);
}
if (fRelease == 1) {
COM.ReleaseStgMedium(pmedium);
}
return COM.S_OK;
}
/* QueryInterface([in] riid, [out] ppvObject)
* Ownership of ppvObject transfers from callee to caller so reference count on ppvObject
* must be incremented before returning. Caller is responsible for releasing ppvObject.
*/
private int QueryInterface(long /*int*/ riid, long /*int*/ ppvObject) {
if (riid == 0 || ppvObject == 0) return COM.E_INVALIDARG;
GUID guid = new GUID();
COM.MoveMemory(guid, riid, GUID.sizeof);
if (COM.IsEqualGUID(guid, COM.IIDIUnknown) || COM.IsEqualGUID(guid, COM.IIDIDropSource)) {
OS.MoveMemory(ppvObject, new long /*int*/[] {iDropSource.getAddress()}, OS.PTR_SIZEOF);
AddRef();
return COM.S_OK;
}
if (COM.IsEqualGUID(guid, COM.IIDIDataObject)) {
OS.MoveMemory(ppvObject, new long /*int*/[] {iDataObject.getAddress()}, OS.PTR_SIZEOF);
AddRef();
return COM.S_OK;
}
OS.MoveMemory(ppvObject, new long /*int*/[] {0}, OS.PTR_SIZEOF);
return COM.E_NOINTERFACE;
}
static Variant writeSafeArray(String string) {
// Create a one dimensional safearray containing two VT_UI1 values
// where VT_UI1 is an unsigned char
// Define cDims, fFeatures and cbElements
short cDims = 1;
short FADF_FIXEDSIZE = 0x10;
short FADF_HAVEVARTYPE = 0x80;
short fFeatures = (short) (FADF_FIXEDSIZE | FADF_HAVEVARTYPE);
int cbElements = 1;
// Create a pointer and copy the data into it
int count = string.length();
char[] chars = new char[count + 1];
string.getChars(0, count, chars, 0);
int cchMultiByte = OS.WideCharToMultiByte(CodePage, 0, chars, -1, null, 0, null, null);
if (cchMultiByte == 0) return null;
long /*int*/ pvData = OS.GlobalAlloc(OS.GMEM_FIXED | OS.GMEM_ZEROINIT, cchMultiByte);
OS.WideCharToMultiByte(CodePage, 0, chars, -1, pvData, cchMultiByte, null, null);
int cElements1 = cchMultiByte;
int lLbound1 = 0;
// Create a safearray in memory
long /*int*/ pSafeArray = OS.GlobalAlloc(OS.GMEM_FIXED | OS.GMEM_ZEROINIT, SAFEARRAY.sizeof);
SAFEARRAY safeArray = new SAFEARRAY();
safeArray.cDims = cDims;
safeArray.fFeatures = fFeatures;
safeArray.cbElements = cbElements;
safeArray.pvData = pvData;
SAFEARRAYBOUND safeArrayBound = new SAFEARRAYBOUND();
safeArray.rgsabound = safeArrayBound;
safeArrayBound.cElements = cElements1;
safeArrayBound.lLbound = lLbound1;
OS.MoveMemory(pSafeArray, safeArray, SAFEARRAY.sizeof);
// Create a variant in memory to hold the safearray
long /*int*/ pVariant = OS.GlobalAlloc(OS.GMEM_FIXED | OS.GMEM_ZEROINIT, Variant.sizeof);
short vt = (short) (OLE.VT_ARRAY | OLE.VT_UI1);
OS.MoveMemory(pVariant, new short[] {vt}, 2);
OS.MoveMemory(pVariant + 8, new long /*int*/[] {pSafeArray}, OS.PTR_SIZEOF);
// Create a by ref variant
Variant variantByRef = new Variant(pVariant, (short) (OLE.VT_BYREF | OLE.VT_VARIANT));
return variantByRef;
}
static String readSafeArray(Variant variantByRef) {
// Read a safearray that contains data of
// type VT_UI1 (unsigned shorts) which contains
// a text stream.
long /*int*/ pPostData = variantByRef.getByRef();
short[] vt_type = new short[1];
OS.MoveMemory(vt_type, pPostData, 2);
String result = null;
if (vt_type[0] == (short) (OLE.VT_BYREF | OLE.VT_VARIANT)) {
int[] pVariant = new int[1];
OS.MoveMemory(pVariant, pPostData + 8, 4);
vt_type = new short[1];
OS.MoveMemory(vt_type, pVariant[0], 2);
if (vt_type[0] == (short) (OLE.VT_ARRAY | OLE.VT_UI1)) {
long /*int*/[] pSafearray = new long /*int*/[1];
OS.MoveMemory(pSafearray, pVariant[0] + 8, OS.PTR_SIZEOF);
SAFEARRAY safeArray = new SAFEARRAY();
OS.MoveMemory(safeArray, pSafearray[0], SAFEARRAY.sizeof);
for (int i = 0; i < safeArray.cDims; i++) {
int cchWideChar =
OS.MultiByteToWideChar(CodePage, OS.MB_PRECOMPOSED, safeArray.pvData, -1, null, 0);
if (cchWideChar == 0) return null;
char[] lpWideCharStr = new char[cchWideChar - 1];
OS.MultiByteToWideChar(
CodePage,
OS.MB_PRECOMPOSED,
safeArray.pvData,
-1,
lpWideCharStr,
lpWideCharStr.length);
result = new String(lpWideCharStr);
}
}
}
return result;
}