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/**
* Copyright (c) 2015 Daniel Molkentin <danimo@owncloud.com>. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
#include "stdafx.h"
#include "OCContextMenu.h"
#include "OCClientInterface.h"
#include <shobjidl.h>
#include <shlwapi.h>
#include <shellapi.h>
#include <StringUtil.h>
extern long g_cDllRef;
OCContextMenu::OCContextMenu(void)
: m_cRef(1)
{
InterlockedIncrement(&g_cDllRef);
}
OCContextMenu::~OCContextMenu(void)
{
InterlockedDecrement(&g_cDllRef);
}
#pragma region IUnknown
// Query to the interface the component supported.
IFACEMETHODIMP OCContextMenu::QueryInterface(REFIID riid, void **ppv)
{
static const QITAB qit[] =
{
QITABENT(OCContextMenu, IContextMenu),
QITABENT(OCContextMenu, IShellExtInit),
{ 0 },
};
return QISearch(this, qit, riid, ppv);
}
// Increase the reference count for an interface on an object.
IFACEMETHODIMP_(ULONG) OCContextMenu::AddRef()
{
return InterlockedIncrement(&m_cRef);
}
// Decrease the reference count for an interface on an object.
IFACEMETHODIMP_(ULONG) OCContextMenu::Release()
{
ULONG cRef = InterlockedDecrement(&m_cRef);
if (0 == cRef) {
delete this;
}
return cRef;
}
#pragma endregion
#pragma region IShellExtInit
// Initialize the context menu handler.
IFACEMETHODIMP OCContextMenu::Initialize(
LPCITEMIDLIST pidlFolder, LPDATAOBJECT pDataObj, HKEY hKeyProgID)
{
m_selectedFiles.clear();
if (!pDataObj) {
return E_INVALIDARG;
}
FORMATETC fe = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
STGMEDIUM stm;
if (SUCCEEDED(pDataObj->GetData(&fe, &stm))) {
// Get an HDROP handle.
HDROP hDrop = static_cast<HDROP>(GlobalLock(stm.hGlobal));
if (hDrop) {
UINT nFiles = DragQueryFile(hDrop, 0xFFFFFFFF, NULL, 0);
for (int i = 0; i < nFiles; ++i) {
// Get the path of the file.
wchar_t buffer[MAX_PATH];
if (!DragQueryFile(hDrop, i, buffer, ARRAYSIZE(buffer))) {
m_selectedFiles.clear();
break;
}
if (i)
m_selectedFiles += L'\x1e';
m_selectedFiles += buffer;
}
GlobalUnlock(stm.hGlobal);
}
ReleaseStgMedium(&stm);
}
// If any value other than S_OK is returned from the method, the context
// menu item is not displayed.
return m_selectedFiles.empty() ? E_FAIL : S_OK;
}
#pragma endregion
#pragma region IContextMenu
void InsertSeperator(HMENU hMenu, UINT indexMenu)
{
// Add a separator.
MENUITEMINFO sep = { sizeof(sep) };
sep.fMask = MIIM_TYPE;
sep.fType = MFT_SEPARATOR;
InsertMenuItem(hMenu, indexMenu, TRUE, &sep);
}
IFACEMETHODIMP OCContextMenu::QueryContextMenu(HMENU hMenu, UINT indexMenu, UINT idCmdFirst, UINT idCmdLast, UINT uFlags)
{
// If uFlags include CMF_DEFAULTONLY then we should not do anything.
if (CMF_DEFAULTONLY & uFlags)
{
return MAKE_HRESULT(SEVERITY_SUCCESS, 0, USHORT(0));
}
m_info = OCClientInterface::FetchInfo(m_selectedFiles);
if (m_info.menuItems.empty()) {
return MAKE_HRESULT(SEVERITY_SUCCESS, 0, USHORT(0));
}
InsertSeperator(hMenu, indexMenu++);
HMENU hSubmenu = CreateMenu();
{
MENUITEMINFO mii = { sizeof(mii) };
mii.fMask = MIIM_SUBMENU | MIIM_FTYPE | MIIM_STRING;
mii.hSubMenu = hSubmenu;
mii.fType = MFT_STRING;
mii.dwTypeData = &m_info.contextMenuTitle[0];
if (!InsertMenuItem(hMenu, indexMenu++, TRUE, &mii))
return HRESULT_FROM_WIN32(GetLastError());
}
InsertSeperator(hMenu, indexMenu++);
UINT indexSubMenu = 0;
for (auto &item : m_info.menuItems) {
bool disabled = item.flags.find(L'd') != std::string::npos;
MENUITEMINFO mii = { sizeof(mii) };
mii.fMask = MIIM_ID | MIIM_FTYPE | MIIM_STRING | MIIM_STATE;
mii.wID = idCmdFirst + indexSubMenu;
mii.fType = MFT_STRING;
mii.dwTypeData = &item.title[0];
mii.fState = disabled ? MFS_DISABLED : MFS_ENABLED;
if (!InsertMenuItem(hSubmenu, indexSubMenu, true, &mii))
return HRESULT_FROM_WIN32(GetLastError());
indexSubMenu++;
}
// Return an HRESULT value with the severity set to SEVERITY_SUCCESS.
// Set the code value to the offset of the largest command identifier
// that was assigned, plus one (1).
return MAKE_HRESULT(SEVERITY_SUCCESS, 0, USHORT(indexSubMenu));
}
IFACEMETHODIMP OCContextMenu::InvokeCommand(LPCMINVOKECOMMANDINFO pici)
{
std::wstring command;
// For the Unicode case, if the high-order word is not zero, the
// command's verb string is in lpcmi->lpVerbW.
if (HIWORD(((CMINVOKECOMMANDINFOEX*)pici)->lpVerbW))
{
command = ((CMINVOKECOMMANDINFOEX *)pici)->lpVerbW;
} else {
// If the command cannot be identified through the verb string, then
// check the identifier offset.
auto offset = LOWORD(pici->lpVerb);
if (offset >= m_info.menuItems.size())
return E_FAIL;
command = m_info.menuItems[offset].command;
}
OCClientInterface::SendRequest(command.data(), m_selectedFiles);
return S_OK;
}
IFACEMETHODIMP OCContextMenu::GetCommandString(UINT_PTR idCommand,
UINT uFlags, UINT *pwReserved, LPSTR pszName, UINT cchMax)
{
if (idCommand < m_info.menuItems.size() && uFlags == GCS_VERBW) {
return StringCchCopyW(reinterpret_cast<PWSTR>(pszName), cchMax,
m_info.menuItems[idCommand].command.data());
}
return E_INVALIDARG;
}
#pragma endregion
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