610 lines
18 KiB
C++
610 lines
18 KiB
C++
// Support back to Vista
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#define _WIN32_WINNT _WIN32_WINNT_VISTA
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#include <sdkddkver.h>
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// Use WRL to define a classic COM class
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#define __WRL_CLASSIC_COM__
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#include <wrl.h>
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#include <windows.h>
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#include <shlobj.h>
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#include <shlwapi.h>
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#include <olectl.h>
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#include <strsafe.h>
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#include "pyshellext_h.h"
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#define DDWM_UPDATEWINDOW (WM_USER+3)
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static HINSTANCE hModule;
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static CLIPFORMAT cfDropDescription;
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static CLIPFORMAT cfDragWindow;
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static const LPCWSTR CLASS_SUBKEY = L"Software\\Classes\\CLSID\\{BEA218D2-6950-497B-9434-61683EC065FE}";
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static const LPCWSTR DRAG_MESSAGE = L"Open with %1";
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using namespace Microsoft::WRL;
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HRESULT FilenameListCchLengthA(LPCSTR pszSource, size_t cchMax, size_t *pcchLength, size_t *pcchCount) {
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HRESULT hr = S_OK;
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size_t count = 0;
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size_t length = 0;
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while (pszSource && pszSource[0]) {
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size_t oneLength;
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hr = StringCchLengthA(pszSource, cchMax - length, &oneLength);
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if (FAILED(hr)) {
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return hr;
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}
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count += 1;
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length += oneLength + (strchr(pszSource, ' ') ? 3 : 1);
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pszSource = &pszSource[oneLength + 1];
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}
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*pcchCount = count;
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*pcchLength = length;
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return hr;
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}
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HRESULT FilenameListCchLengthW(LPCWSTR pszSource, size_t cchMax, size_t *pcchLength, size_t *pcchCount) {
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HRESULT hr = S_OK;
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size_t count = 0;
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size_t length = 0;
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while (pszSource && pszSource[0]) {
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size_t oneLength;
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hr = StringCchLengthW(pszSource, cchMax - length, &oneLength);
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if (FAILED(hr)) {
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return hr;
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}
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count += 1;
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length += oneLength + (wcschr(pszSource, ' ') ? 3 : 1);
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pszSource = &pszSource[oneLength + 1];
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}
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*pcchCount = count;
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*pcchLength = length;
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return hr;
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}
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HRESULT FilenameListCchCopyA(STRSAFE_LPSTR pszDest, size_t cchDest, LPCSTR pszSource, LPCSTR pszSeparator) {
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HRESULT hr = S_OK;
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size_t count = 0;
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size_t length = 0;
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while (pszSource[0]) {
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STRSAFE_LPSTR newDest;
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hr = StringCchCopyExA(pszDest, cchDest, pszSource, &newDest, &cchDest, 0);
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if (FAILED(hr)) {
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return hr;
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}
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pszSource += (newDest - pszDest) + 1;
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pszDest = PathQuoteSpacesA(pszDest) ? newDest + 2 : newDest;
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if (pszSource[0]) {
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hr = StringCchCopyExA(pszDest, cchDest, pszSeparator, &newDest, &cchDest, 0);
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if (FAILED(hr)) {
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return hr;
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}
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pszDest = newDest;
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}
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}
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return hr;
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}
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HRESULT FilenameListCchCopyW(STRSAFE_LPWSTR pszDest, size_t cchDest, LPCWSTR pszSource, LPCWSTR pszSeparator) {
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HRESULT hr = S_OK;
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size_t count = 0;
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size_t length = 0;
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while (pszSource[0]) {
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STRSAFE_LPWSTR newDest;
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hr = StringCchCopyExW(pszDest, cchDest, pszSource, &newDest, &cchDest, 0);
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if (FAILED(hr)) {
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return hr;
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}
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pszSource += (newDest - pszDest) + 1;
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pszDest = PathQuoteSpacesW(pszDest) ? newDest + 2 : newDest;
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if (pszSource[0]) {
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hr = StringCchCopyExW(pszDest, cchDest, pszSeparator, &newDest, &cchDest, 0);
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if (FAILED(hr)) {
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return hr;
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}
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pszDest = newDest;
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}
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}
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return hr;
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}
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class PyShellExt : public RuntimeClass<
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RuntimeClassFlags<ClassicCom>,
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IDropTarget,
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IPersistFile
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>
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{
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LPOLESTR target, target_dir;
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DWORD target_mode;
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IDataObject *data_obj;
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public:
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PyShellExt() : target(NULL), target_dir(NULL), target_mode(0), data_obj(NULL) {
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OutputDebugString(L"PyShellExt::PyShellExt");
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}
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~PyShellExt() {
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if (target) {
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CoTaskMemFree(target);
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}
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if (target_dir) {
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CoTaskMemFree(target_dir);
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}
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if (data_obj) {
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data_obj->Release();
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}
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}
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private:
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HRESULT UpdateDropDescription(IDataObject *pDataObj) {
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STGMEDIUM medium;
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FORMATETC fmt = {
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cfDropDescription,
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NULL,
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DVASPECT_CONTENT,
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-1,
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TYMED_HGLOBAL
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};
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auto hr = pDataObj->GetData(&fmt, &medium);
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if (FAILED(hr)) {
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OutputDebugString(L"PyShellExt::UpdateDropDescription - failed to get DROPDESCRIPTION format");
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return hr;
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}
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if (!medium.hGlobal) {
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OutputDebugString(L"PyShellExt::UpdateDropDescription - DROPDESCRIPTION format had NULL hGlobal");
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ReleaseStgMedium(&medium);
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return E_FAIL;
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}
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auto dd = (DROPDESCRIPTION*)GlobalLock(medium.hGlobal);
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if (!dd) {
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OutputDebugString(L"PyShellExt::UpdateDropDescription - failed to lock DROPDESCRIPTION hGlobal");
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ReleaseStgMedium(&medium);
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return E_FAIL;
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}
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StringCchCopy(dd->szMessage, sizeof(dd->szMessage) / sizeof(dd->szMessage[0]), DRAG_MESSAGE);
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StringCchCopy(dd->szInsert, sizeof(dd->szInsert) / sizeof(dd->szInsert[0]), PathFindFileNameW(target));
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dd->type = DROPIMAGE_MOVE;
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GlobalUnlock(medium.hGlobal);
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ReleaseStgMedium(&medium);
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return S_OK;
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}
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HRESULT GetDragWindow(IDataObject *pDataObj, HWND *phWnd) {
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HRESULT hr;
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HWND *pMem;
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STGMEDIUM medium;
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FORMATETC fmt = {
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cfDragWindow,
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NULL,
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DVASPECT_CONTENT,
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-1,
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TYMED_HGLOBAL
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};
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hr = pDataObj->GetData(&fmt, &medium);
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if (FAILED(hr)) {
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OutputDebugString(L"PyShellExt::GetDragWindow - failed to get DragWindow format");
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return hr;
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}
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if (!medium.hGlobal) {
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OutputDebugString(L"PyShellExt::GetDragWindow - DragWindow format had NULL hGlobal");
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ReleaseStgMedium(&medium);
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return E_FAIL;
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}
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pMem = (HWND*)GlobalLock(medium.hGlobal);
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if (!pMem) {
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OutputDebugString(L"PyShellExt::GetDragWindow - failed to lock DragWindow hGlobal");
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ReleaseStgMedium(&medium);
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return E_FAIL;
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}
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*phWnd = *pMem;
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GlobalUnlock(medium.hGlobal);
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ReleaseStgMedium(&medium);
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return S_OK;
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}
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HRESULT GetArguments(IDataObject *pDataObj, LPCWSTR *pArguments) {
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HRESULT hr;
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DROPFILES *pdropfiles;
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STGMEDIUM medium;
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FORMATETC fmt = {
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CF_HDROP,
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NULL,
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DVASPECT_CONTENT,
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-1,
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TYMED_HGLOBAL
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};
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hr = pDataObj->GetData(&fmt, &medium);
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if (FAILED(hr)) {
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OutputDebugString(L"PyShellExt::GetArguments - failed to get CF_HDROP format");
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return hr;
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}
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if (!medium.hGlobal) {
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OutputDebugString(L"PyShellExt::GetArguments - CF_HDROP format had NULL hGlobal");
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ReleaseStgMedium(&medium);
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return E_FAIL;
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}
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pdropfiles = (DROPFILES*)GlobalLock(medium.hGlobal);
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if (!pdropfiles) {
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OutputDebugString(L"PyShellExt::GetArguments - failed to lock CF_HDROP hGlobal");
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ReleaseStgMedium(&medium);
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return E_FAIL;
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}
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if (pdropfiles->fWide) {
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LPCWSTR files = (LPCWSTR)((char*)pdropfiles + pdropfiles->pFiles);
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size_t len, count;
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hr = FilenameListCchLengthW(files, 32767, &len, &count);
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if (SUCCEEDED(hr)) {
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LPWSTR args = (LPWSTR)CoTaskMemAlloc(sizeof(WCHAR) * (len + 1));
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if (args) {
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hr = FilenameListCchCopyW(args, 32767, files, L" ");
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if (SUCCEEDED(hr)) {
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*pArguments = args;
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} else {
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CoTaskMemFree(args);
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}
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} else {
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hr = E_OUTOFMEMORY;
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}
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}
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} else {
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LPCSTR files = (LPCSTR)((char*)pdropfiles + pdropfiles->pFiles);
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size_t len, count;
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hr = FilenameListCchLengthA(files, 32767, &len, &count);
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if (SUCCEEDED(hr)) {
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LPSTR temp = (LPSTR)CoTaskMemAlloc(sizeof(CHAR) * (len + 1));
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if (temp) {
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hr = FilenameListCchCopyA(temp, 32767, files, " ");
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if (SUCCEEDED(hr)) {
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int wlen = MultiByteToWideChar(CP_ACP, 0, temp, (int)len, NULL, 0);
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if (wlen) {
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LPWSTR args = (LPWSTR)CoTaskMemAlloc(sizeof(WCHAR) * (wlen + 1));
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if (MultiByteToWideChar(CP_ACP, 0, temp, (int)len, args, wlen + 1)) {
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*pArguments = args;
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} else {
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OutputDebugString(L"PyShellExt::GetArguments - failed to convert multi-byte to wide-char path");
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CoTaskMemFree(args);
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hr = E_FAIL;
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}
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} else {
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OutputDebugString(L"PyShellExt::GetArguments - failed to get length of wide-char path");
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hr = E_FAIL;
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}
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}
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CoTaskMemFree(temp);
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} else {
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hr = E_OUTOFMEMORY;
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}
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}
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}
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GlobalUnlock(medium.hGlobal);
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ReleaseStgMedium(&medium);
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return hr;
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}
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HRESULT NotifyDragWindow(HWND hwnd) {
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LRESULT res;
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if (!hwnd) {
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return S_FALSE;
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}
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res = SendMessage(hwnd, DDWM_UPDATEWINDOW, 0, NULL);
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if (res) {
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OutputDebugString(L"PyShellExt::NotifyDragWindow - failed to post DDWM_UPDATEWINDOW");
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return E_FAIL;
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}
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return S_OK;
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}
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public:
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// IDropTarget implementation
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STDMETHODIMP DragEnter(IDataObject *pDataObj, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
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HWND hwnd;
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OutputDebugString(L"PyShellExt::DragEnter");
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pDataObj->AddRef();
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data_obj = pDataObj;
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*pdwEffect = DROPEFFECT_MOVE;
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if (FAILED(UpdateDropDescription(data_obj))) {
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OutputDebugString(L"PyShellExt::DragEnter - failed to update drop description");
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}
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if (FAILED(GetDragWindow(data_obj, &hwnd))) {
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OutputDebugString(L"PyShellExt::DragEnter - failed to get drag window");
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}
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if (FAILED(NotifyDragWindow(hwnd))) {
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OutputDebugString(L"PyShellExt::DragEnter - failed to notify drag window");
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}
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return S_OK;
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}
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STDMETHODIMP DragLeave() {
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return S_OK;
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}
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STDMETHODIMP DragOver(DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
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return S_OK;
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}
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STDMETHODIMP Drop(IDataObject *pDataObj, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
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LPCWSTR args;
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OutputDebugString(L"PyShellExt::Drop");
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*pdwEffect = DROPEFFECT_NONE;
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if (pDataObj != data_obj) {
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OutputDebugString(L"PyShellExt::Drop - unexpected data object");
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return E_FAIL;
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}
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data_obj->Release();
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data_obj = NULL;
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if (SUCCEEDED(GetArguments(pDataObj, &args))) {
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OutputDebugString(args);
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ShellExecute(NULL, NULL, target, args, target_dir, SW_NORMAL);
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CoTaskMemFree((LPVOID)args);
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} else {
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OutputDebugString(L"PyShellExt::Drop - failed to get launch arguments");
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}
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return S_OK;
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}
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// IPersistFile implementation
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STDMETHODIMP GetCurFile(LPOLESTR *ppszFileName) {
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HRESULT hr;
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size_t len;
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if (!ppszFileName) {
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return E_POINTER;
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}
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hr = StringCchLength(target, STRSAFE_MAX_CCH - 1, &len);
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if (FAILED(hr)) {
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return E_FAIL;
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}
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*ppszFileName = (LPOLESTR)CoTaskMemAlloc(sizeof(WCHAR) * (len + 1));
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if (!*ppszFileName) {
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return E_OUTOFMEMORY;
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}
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hr = StringCchCopy(*ppszFileName, len + 1, target);
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if (FAILED(hr)) {
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CoTaskMemFree(*ppszFileName);
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*ppszFileName = NULL;
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return E_FAIL;
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}
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return S_OK;
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}
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STDMETHODIMP IsDirty() {
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return S_FALSE;
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}
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STDMETHODIMP Load(LPCOLESTR pszFileName, DWORD dwMode) {
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HRESULT hr;
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size_t len;
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OutputDebugString(L"PyShellExt::Load");
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OutputDebugString(pszFileName);
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hr = StringCchLength(pszFileName, STRSAFE_MAX_CCH - 1, &len);
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if (FAILED(hr)) {
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OutputDebugString(L"PyShellExt::Load - failed to get string length");
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return hr;
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}
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if (target) {
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CoTaskMemFree(target);
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}
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if (target_dir) {
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CoTaskMemFree(target_dir);
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}
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target = (LPOLESTR)CoTaskMemAlloc(sizeof(WCHAR) * (len + 1));
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if (!target) {
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OutputDebugString(L"PyShellExt::Load - E_OUTOFMEMORY");
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return E_OUTOFMEMORY;
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}
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target_dir = (LPOLESTR)CoTaskMemAlloc(sizeof(WCHAR) * (len + 1));
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if (!target_dir) {
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OutputDebugString(L"PyShellExt::Load - E_OUTOFMEMORY");
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return E_OUTOFMEMORY;
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}
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hr = StringCchCopy(target, len + 1, pszFileName);
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if (FAILED(hr)) {
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OutputDebugString(L"PyShellExt::Load - failed to copy string");
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return hr;
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}
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hr = StringCchCopy(target_dir, len + 1, pszFileName);
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if (FAILED(hr)) {
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OutputDebugString(L"PyShellExt::Load - failed to copy string");
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return hr;
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}
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if (!PathRemoveFileSpecW(target_dir)) {
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OutputDebugStringW(L"PyShellExt::Load - failed to remove filespec from target");
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return E_FAIL;
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}
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OutputDebugString(target);
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target_mode = dwMode;
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OutputDebugString(L"PyShellExt::Load - S_OK");
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return S_OK;
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}
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STDMETHODIMP Save(LPCOLESTR pszFileName, BOOL fRemember) {
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return E_NOTIMPL;
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}
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STDMETHODIMP SaveCompleted(LPCOLESTR pszFileName) {
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return E_NOTIMPL;
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}
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STDMETHODIMP GetClassID(CLSID *pClassID) {
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*pClassID = CLSID_PyShellExt;
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return S_OK;
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}
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};
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CoCreatableClass(PyShellExt);
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STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, _COM_Outptr_ void** ppv) {
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return Module<InProc>::GetModule().GetClassObject(rclsid, riid, ppv);
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}
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STDAPI DllCanUnloadNow() {
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return Module<InProc>::GetModule().Terminate() ? S_OK : S_FALSE;
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}
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STDAPI DllRegisterServer() {
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LONG res;
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SECURITY_ATTRIBUTES secattr = { sizeof(SECURITY_ATTRIBUTES), NULL, FALSE };
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LPSECURITY_ATTRIBUTES psecattr = NULL;
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HKEY key, ipsKey;
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WCHAR modname[MAX_PATH];
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DWORD modname_len;
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OutputDebugString(L"PyShellExt::DllRegisterServer");
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if (!hModule) {
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OutputDebugString(L"PyShellExt::DllRegisterServer - module handle was not set");
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return SELFREG_E_CLASS;
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}
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modname_len = GetModuleFileName(hModule, modname, MAX_PATH);
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if (modname_len == 0 ||
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(modname_len == MAX_PATH && GetLastError() == ERROR_INSUFFICIENT_BUFFER)) {
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OutputDebugString(L"PyShellExt::DllRegisterServer - failed to get module file name");
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return SELFREG_E_CLASS;
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}
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DWORD disp;
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res = RegCreateKeyEx(HKEY_LOCAL_MACHINE, CLASS_SUBKEY, 0, NULL, 0,
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KEY_ALL_ACCESS, psecattr, &key, &disp);
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if (res == ERROR_ACCESS_DENIED) {
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OutputDebugString(L"PyShellExt::DllRegisterServer - failed to write per-machine registration. Attempting per-user instead.");
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res = RegCreateKeyEx(HKEY_CURRENT_USER, CLASS_SUBKEY, 0, NULL, 0,
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KEY_ALL_ACCESS, psecattr, &key, &disp);
|
|
}
|
|
if (res != ERROR_SUCCESS) {
|
|
OutputDebugString(L"PyShellExt::DllRegisterServer - failed to create class key");
|
|
return SELFREG_E_CLASS;
|
|
}
|
|
|
|
res = RegCreateKeyEx(key, L"InProcServer32", 0, NULL, 0,
|
|
KEY_ALL_ACCESS, psecattr, &ipsKey, NULL);
|
|
if (res != ERROR_SUCCESS) {
|
|
RegCloseKey(key);
|
|
OutputDebugString(L"PyShellExt::DllRegisterServer - failed to create InProcServer32 key");
|
|
return SELFREG_E_CLASS;
|
|
}
|
|
|
|
res = RegSetValueEx(ipsKey, NULL, 0,
|
|
REG_SZ, (LPBYTE)modname, modname_len * sizeof(modname[0]));
|
|
|
|
if (res != ERROR_SUCCESS) {
|
|
RegCloseKey(ipsKey);
|
|
RegCloseKey(key);
|
|
OutputDebugString(L"PyShellExt::DllRegisterServer - failed to set server path");
|
|
return SELFREG_E_CLASS;
|
|
}
|
|
|
|
res = RegSetValueEx(ipsKey, L"ThreadingModel", 0,
|
|
REG_SZ, (LPBYTE)(L"Apartment"), sizeof(L"Apartment"));
|
|
|
|
RegCloseKey(ipsKey);
|
|
RegCloseKey(key);
|
|
if (res != ERROR_SUCCESS) {
|
|
OutputDebugString(L"PyShellExt::DllRegisterServer - failed to set threading model");
|
|
return SELFREG_E_CLASS;
|
|
}
|
|
|
|
SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, NULL, NULL);
|
|
|
|
OutputDebugString(L"PyShellExt::DllRegisterServer - S_OK");
|
|
return S_OK;
|
|
}
|
|
|
|
STDAPI DllUnregisterServer() {
|
|
LONG res_lm, res_cu;
|
|
|
|
res_lm = RegDeleteTree(HKEY_LOCAL_MACHINE, CLASS_SUBKEY);
|
|
if (res_lm != ERROR_SUCCESS && res_lm != ERROR_FILE_NOT_FOUND) {
|
|
OutputDebugString(L"PyShellExt::DllUnregisterServer - failed to delete per-machine registration");
|
|
return SELFREG_E_CLASS;
|
|
}
|
|
|
|
res_cu = RegDeleteTree(HKEY_CURRENT_USER, CLASS_SUBKEY);
|
|
if (res_cu != ERROR_SUCCESS && res_cu != ERROR_FILE_NOT_FOUND) {
|
|
OutputDebugString(L"PyShellExt::DllUnregisterServer - failed to delete per-user registration");
|
|
return SELFREG_E_CLASS;
|
|
}
|
|
|
|
if (res_lm == ERROR_FILE_NOT_FOUND && res_cu == ERROR_FILE_NOT_FOUND) {
|
|
OutputDebugString(L"PyShellExt::DllUnregisterServer - extension was not registered");
|
|
return SELFREG_E_CLASS;
|
|
}
|
|
|
|
SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, NULL, NULL);
|
|
|
|
OutputDebugString(L"PyShellExt::DllUnregisterServer - S_OK");
|
|
return S_OK;
|
|
}
|
|
|
|
STDAPI_(BOOL) DllMain(_In_opt_ HINSTANCE hinst, DWORD reason, _In_opt_ void*) {
|
|
if (reason == DLL_PROCESS_ATTACH) {
|
|
hModule = hinst;
|
|
|
|
cfDropDescription = RegisterClipboardFormat(CFSTR_DROPDESCRIPTION);
|
|
if (!cfDropDescription) {
|
|
OutputDebugString(L"PyShellExt::DllMain - failed to get CFSTR_DROPDESCRIPTION format");
|
|
}
|
|
cfDragWindow = RegisterClipboardFormat(L"DragWindow");
|
|
if (!cfDragWindow) {
|
|
OutputDebugString(L"PyShellExt::DllMain - failed to get DragWindow format");
|
|
}
|
|
|
|
DisableThreadLibraryCalls(hinst);
|
|
}
|
|
return TRUE;
|
|
} |