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#include "envshell.h"
#include "env.h"
#include <log.h>
#include <utility.h>
namespace env
{
using namespace MOBase;
const int QCM_FIRST = 1;
const int QCM_LAST = 0x7ff;
class MenuFailed : public std::runtime_error
{
public:
MenuFailed(HRESULT r, const std::string& what)
: runtime_error(fmt::format(
"{}, {}",
what, QString::fromStdWString(formatSystemMessage(r)).toStdString()))
{
}
};
class WndProcFilter : public QAbstractNativeEventFilter
{
public:
WndProcFilter(IContextMenu* cm)
: m_cm2(nullptr), m_cm3(nullptr)
{
IContextMenu2* cm2 = nullptr;
if (SUCCEEDED(cm->QueryInterface(IID_IContextMenu2, (void**)&cm2))) {
m_cm2.reset(cm2);
}
IContextMenu3* cm3 = nullptr;
if (SUCCEEDED(cm->QueryInterface(IID_IContextMenu3, (void**)&cm3))) {
m_cm3.reset(cm3);
}
}
bool nativeEventFilter(const QByteArray& type, void* m, long* lresultOut) override
{
if (m_cm3) {
MSG* msg = (MSG*)m;
LRESULT lresult = 0;
const auto r = m_cm3->HandleMenuMsg2(
msg->message, msg->wParam, msg->lParam, &lresult);
if (SUCCEEDED(r)) {
if (lresultOut) {
*lresultOut = lresult;
}
return true;
}
}
if (m_cm2) {
MSG* msg = (MSG*)m;
const auto r = m_cm2->HandleMenuMsg(
msg->message, msg->wParam, msg->lParam);
if (SUCCEEDED(r)) {
if (lresultOut) {
*lresultOut = 0;
}
return true;
}
}
return false;
}
private:
COMPtr<IContextMenu2> m_cm2;
COMPtr<IContextMenu3> m_cm3;
};
CoTaskMemPtr<LPITEMIDLIST> getIDL(const wchar_t* path)
{
LPITEMIDLIST pidl;
SFGAOF sfgao;
const auto r = SHParseDisplayName(path, nullptr, &pidl, 0, &sfgao);
if (FAILED(r)) {
throw MenuFailed(r, "SHParseDisplayName failed");
}
return CoTaskMemPtr<LPITEMIDLIST>(pidl);
}
std::pair<COMPtr<IShellFolder>, LPCITEMIDLIST> getShellFolder(LPITEMIDLIST idl)
{
IShellFolder* psf = nullptr;
LPCITEMIDLIST pidlChild = nullptr;
const auto r = SHBindToParent(
idl, IID_IShellFolder, reinterpret_cast<void**>(&psf), &pidlChild);
if (FAILED(r)) {
throw MenuFailed(r, "SHBindToParent failed");
}
return {COMPtr<IShellFolder>(psf), pidlChild};
}
COMPtr<IContextMenu> getContextMenu(IShellFolder* psf, LPCITEMIDLIST idl)
{
IContextMenu* pcm = nullptr;
const auto r = psf->GetUIObjectOf(
0, 1, &idl, IID_IContextMenu, nullptr,
reinterpret_cast<void**>(&pcm));
if (FAILED(r)) {
throw MenuFailed(r, "GetUIObjectOf failed");
}
return COMPtr<IContextMenu>(pcm);
}
HMenuPtr createMenu(IContextMenu* cm)
{
HMENU hmenu = CreatePopupMenu();
if (!hmenu) {
const auto e = GetLastError();
throw MenuFailed(e, "CreatePopupMenu failed");
}
const auto r = cm->QueryContextMenu(
hmenu, 0, QCM_FIRST, QCM_LAST, CMF_EXTENDEDVERBS);
if (FAILED(r)) {
throw MenuFailed(r, "QueryContextMenu failed");
}
return HMenuPtr(hmenu);
}
int runMenu(IContextMenu* cm, HWND hwnd, HMENU menu, const QPoint& p)
{
auto filter = std::make_unique<WndProcFilter>(cm);
QCoreApplication::instance()->installNativeEventFilter(filter.get());
return TrackPopupMenuEx(menu, TPM_RETURNCMD, p.x(), p.y(), hwnd, nullptr);
}
void invoke(HWND hwnd, const QPoint& p, int cmd, IContextMenu* cm)
{
CMINVOKECOMMANDINFOEX info = {};
info.cbSize = sizeof(info);
info.fMask = CMIC_MASK_UNICODE | CMIC_MASK_PTINVOKE;
info.hwnd = hwnd;
info.lpVerb = MAKEINTRESOURCEA(cmd);
info.lpVerbW = MAKEINTRESOURCEW(cmd);
info.nShow = SW_SHOWNORMAL;
info.ptInvoke = {p.x(), p.y()};
// note: this calls the query version because the Qt even loop hasn't run
// yet and shift is still considered pressed
const auto m = QApplication::queryKeyboardModifiers();
if (m & Qt::ShiftModifier) {
info.fMask |= CMIC_MASK_SHIFT_DOWN;
}
if (m & Qt::ControlModifier) {
info.fMask |= CMIC_MASK_CONTROL_DOWN;
}
const auto r = cm->InvokeCommand((CMINVOKECOMMANDINFO*)&info);
if (FAILED(r)) {
throw MenuFailed(r, fmt::format("InvokeCommand failed, verb={}", cmd));
}
}
void showShellMenu(QWidget* parent, const QFileInfo& file, const QPoint& pos)
{
const auto path = QDir::toNativeSeparators(file.absoluteFilePath());
try
{
auto idl = getIDL(path.toStdWString().c_str());
auto [sf, childIdl] = getShellFolder(idl.get());
auto cm = getContextMenu(sf.get(), childIdl);
auto hmenu = createMenu(cm.get());
auto hwnd = (HWND)parent->window()->winId();
const int cmd = runMenu(cm.get(), hwnd, hmenu.get(), pos);
if (cmd <= 0) {
return;
}
invoke(hwnd, pos, cmd - QCM_FIRST, cm.get());
}
catch(MenuFailed& e)
{
log::error("can't create shell menu for '{}': {}", path, e.what());
}
}
} // namespace
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