Adding upstream version 2:9.1.0016.upstream/2%9.1.0016

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1050 insertions, 0 deletions

diff --git a/src/GvimExt/gvimext.cpp b/src/GvimExt/gvimext.cpp
new file mode 100644
index 0000000..e58b142
--- /dev/null
+++ b/src/GvimExt/gvimext.cpp
@@ -0,0 +1,1050 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved	gvimext by Tianmiao Hu
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ */
+
+/*
+ * gvimext is a DLL which is used for the "Edit with Vim" context menu
+ * extension.  It implements a MS defined interface with the Shell.
+ *
+ * If you have any questions or any suggestions concerning gvimext, please
+ * contact Tianmiao Hu: tianmiao@acm.org.
+ */
+
+#include "gvimext.h"
+
+static char *searchpath(char *name);
+
+// Always get an error while putting the following stuff to the
+// gvimext.h file as class protected variables, give up and
+// declare them as global stuff
+FORMATETC fmte = {CF_HDROP,
+		  (DVTARGETDEVICE FAR *)NULL,
+		  DVASPECT_CONTENT,
+		  -1,
+		  TYMED_HGLOBAL
+		 };
+STGMEDIUM medium;
+HRESULT hres = 0;
+UINT cbFiles = 0;
+
+/* The buffers size used to be MAX_PATH (260 bytes), but that's not always
+ * enough */
+#define BUFSIZE 1100
+
+// The "Edit with Vim" shell extension provides these choices when
+// a new instance of Gvim is selected:
+//   - use tabpages
+//   - enable diff mode
+//   - none of the above
+#define EDIT_WITH_VIM_USE_TABPAGES (2)
+#define EDIT_WITH_VIM_IN_DIFF_MODE (1)
+#define EDIT_WITH_VIM_NO_OPTIONS   (0)
+
+//
+// Get the name of the Gvim executable to use, with the path.
+// When "runtime" is non-zero, we were called to find the runtime directory.
+// Returns the path in name[BUFSIZE].  It's empty when it fails.
+//
+    static void
+getGvimName(char *name, int runtime)
+{
+    HKEY	keyhandle;
+    DWORD	hlen;
+
+    // Get the location of gvim from the registry.
+    name[0] = 0;
+    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Vim\\Gvim", 0,
+				       KEY_READ, &keyhandle) == ERROR_SUCCESS)
+    {
+	hlen = BUFSIZE;
+	if (RegQueryValueEx(keyhandle, "path", 0, NULL, (BYTE *)name, &hlen)
+							     != ERROR_SUCCESS)
+	    name[0] = 0;
+	else
+	    name[hlen] = 0;
+	RegCloseKey(keyhandle);
+    }
+
+    // Registry didn't work, use the search path.
+    if (name[0] == 0)
+	strcpy(name, searchpath((char *)"gvim.exe"));
+
+    if (!runtime)
+    {
+	// Only when looking for the executable, not the runtime dir, we can
+	// search for the batch file or a name without a path.
+	if (name[0] == 0)
+	    strcpy(name, searchpath((char *)"gvim.bat"));
+	if (name[0] == 0)
+	    strcpy(name, "gvim");	// finds gvim.bat or gvim.exe
+    }
+}
+
+    static void
+getGvimInvocation(char *name, int runtime)
+{
+    getGvimName(name, runtime);
+    // avoid that Vim tries to expand wildcards in the file names
+    strcat(name, " --literal");
+}
+
+    static void
+getGvimInvocationW(wchar_t *nameW)
+{
+    char *name;
+
+    name = (char *)malloc(BUFSIZE);
+    getGvimInvocation(name, 0);
+    mbstowcs(nameW, name, BUFSIZE);
+    free(name);
+}
+
+//
+// Get the Vim runtime directory into buf[BUFSIZE].
+// The result is empty when it failed.
+// When it works, the path ends in a slash or backslash.
+//
+    static void
+getRuntimeDir(char *buf)
+{
+    int		idx;
+
+    getGvimName(buf, 1);
+    if (buf[0] != 0)
+    {
+	// When no path found, use the search path to expand it.
+	if (strchr(buf, '/') == NULL && strchr(buf, '\\') == NULL)
+	    strcpy(buf, searchpath(buf));
+
+	// remove "gvim.exe" from the end
+	for (idx = (int)strlen(buf) - 1; idx >= 0; idx--)
+	    if (buf[idx] == '\\' || buf[idx] == '/')
+	    {
+		buf[idx + 1] = 0;
+		break;
+	    }
+    }
+}
+
+    WCHAR *
+utf8_to_utf16(const char *s)
+{
+    int size = MultiByteToWideChar(CP_UTF8, 0, s, -1, NULL, 0);
+    WCHAR *buf = (WCHAR *)malloc(size * sizeof(WCHAR));
+    MultiByteToWideChar(CP_UTF8, 0, s, -1, buf, size);
+    return buf;
+}
+
+    HBITMAP
+IconToBitmap(HICON hIcon, HBRUSH hBackground, int width, int height)
+{
+    HDC hDC = GetDC(NULL);
+    HDC hMemDC = CreateCompatibleDC(hDC);
+    HBITMAP hMemBmp = CreateCompatibleBitmap(hDC, width, height);
+    HBITMAP hResultBmp = NULL;
+    HGDIOBJ hOrgBMP = SelectObject(hMemDC, hMemBmp);
+
+    DrawIconEx(hMemDC, 0, 0, hIcon, width, height, 0, hBackground, DI_NORMAL);
+
+    hResultBmp = hMemBmp;
+    hMemBmp = NULL;
+
+    SelectObject(hMemDC, hOrgBMP);
+    DeleteDC(hMemDC);
+    ReleaseDC(NULL, hDC);
+    DestroyIcon(hIcon);
+    return hResultBmp;
+}
+
+//
+// GETTEXT: translated messages and menu entries
+//
+#ifndef FEAT_GETTEXT
+# define _(x)	    x
+# define W_impl(x) _wcsdup(L##x)
+# define W(x)	    W_impl(x)
+# define set_gettext_codeset()	    NULL
+# define restore_gettext_codeset(x)
+#else
+# define _(x)	    (*dyn_libintl_gettext)(x)
+# define W(x)	    utf8_to_utf16(x)
+# define VIMPACKAGE "vim"
+# ifndef GETTEXT_DLL
+#  define GETTEXT_DLL "libintl.dll"
+#  define GETTEXT_DLL_ALT "libintl-8.dll"
+# endif
+
+// Dummy functions
+static char *null_libintl_gettext(const char *);
+static char *null_libintl_textdomain(const char *);
+static char *null_libintl_bindtextdomain(const char *, const char *);
+static char *null_libintl_bind_textdomain_codeset(const char *, const char *);
+static int dyn_libintl_init(char *dir);
+static void dyn_libintl_end(void);
+
+static HINSTANCE hLibintlDLL = 0;
+static char *(*dyn_libintl_gettext)(const char *) = null_libintl_gettext;
+static char *(*dyn_libintl_textdomain)(const char *) = null_libintl_textdomain;
+static char *(*dyn_libintl_bindtextdomain)(const char *, const char *)
+						= null_libintl_bindtextdomain;
+static char *(*dyn_libintl_bind_textdomain_codeset)(const char *, const char *)
+				       = null_libintl_bind_textdomain_codeset;
+
+//
+// Attempt to load libintl.dll.  If it doesn't work, use dummy functions.
+// "dir" is the directory where the libintl.dll might be.
+// Return 1 for success, 0 for failure.
+//
+    static int
+dyn_libintl_init(char *dir)
+{
+    int		i;
+    static struct
+    {
+	char	    *name;
+	FARPROC	    *ptr;
+    } libintl_entry[] =
+    {
+	{(char *)"gettext",		(FARPROC*)&dyn_libintl_gettext},
+	{(char *)"textdomain",		(FARPROC*)&dyn_libintl_textdomain},
+	{(char *)"bindtextdomain",	(FARPROC*)&dyn_libintl_bindtextdomain},
+	{(char *)"bind_textdomain_codeset", (FARPROC*)&dyn_libintl_bind_textdomain_codeset},
+	{NULL, NULL}
+    };
+    DWORD	len, len2;
+    LPWSTR	buf = NULL;
+    LPWSTR	buf2 = NULL;
+
+    // No need to initialize twice.
+    if (hLibintlDLL)
+	return 1;
+
+    // Load gettext library from $VIMRUNTIME\GvimExt{64,32} directory.
+    // Add the directory to $PATH temporarily.
+    len = GetEnvironmentVariableW(L"PATH", NULL, 0);
+    len2 = MAX_PATH + 1 + len;
+    buf = (LPWSTR)malloc(len * sizeof(WCHAR));
+    buf2 = (LPWSTR)malloc(len2 * sizeof(WCHAR));
+    if (buf != NULL && buf2 != NULL)
+    {
+	GetEnvironmentVariableW(L"PATH", buf, len);
+# ifdef _WIN64
+	_snwprintf(buf2, len2, L"%S\\GvimExt64;%s", dir, buf);
+# else
+	_snwprintf(buf2, len2, L"%S\\GvimExt32;%s", dir, buf);
+# endif
+	SetEnvironmentVariableW(L"PATH", buf2);
+	hLibintlDLL = LoadLibrary(GETTEXT_DLL);
+# ifdef GETTEXT_DLL_ALT
+	if (!hLibintlDLL)
+	    hLibintlDLL = LoadLibrary(GETTEXT_DLL_ALT);
+# endif
+	SetEnvironmentVariableW(L"PATH", buf);
+    }
+    free(buf);
+    free(buf2);
+    if (!hLibintlDLL)
+	return 0;
+
+    // Get the addresses of the functions we need.
+    for (i = 0; libintl_entry[i].name != NULL
+					 && libintl_entry[i].ptr != NULL; ++i)
+    {
+	if ((*libintl_entry[i].ptr = GetProcAddress(hLibintlDLL,
+					      libintl_entry[i].name)) == NULL)
+	{
+	    dyn_libintl_end();
+	    return 0;
+	}
+    }
+    return 1;
+}
+
+    static void
+dyn_libintl_end(void)
+{
+    if (hLibintlDLL)
+	FreeLibrary(hLibintlDLL);
+    hLibintlDLL			= NULL;
+    dyn_libintl_gettext		= null_libintl_gettext;
+    dyn_libintl_textdomain	= null_libintl_textdomain;
+    dyn_libintl_bindtextdomain	= null_libintl_bindtextdomain;
+    dyn_libintl_bind_textdomain_codeset	= null_libintl_bind_textdomain_codeset;
+}
+
+    static char *
+null_libintl_gettext(const char *msgid)
+{
+    return (char *)msgid;
+}
+
+    static char *
+null_libintl_textdomain(const char * /* domainname */)
+{
+    return NULL;
+}
+
+    static char *
+null_libintl_bindtextdomain(const char * /* domainname */, const char * /* dirname */)
+{
+    return NULL;
+}
+
+    static char *
+null_libintl_bind_textdomain_codeset(const char * /* domainname */, const char * /* codeset */)
+{
+    return NULL;
+}
+
+//
+// Setup for translating strings.
+//
+    static void
+dyn_gettext_load(void)
+{
+    char    szBuff[BUFSIZE];
+    DWORD   len;
+
+    // Try to locate the runtime files.  The path is used to find libintl.dll
+    // and the vim.mo files.
+    getRuntimeDir(szBuff);
+    if (szBuff[0] != 0)
+    {
+	len = (DWORD)strlen(szBuff);
+	if (dyn_libintl_init(szBuff))
+	{
+	    strcpy(szBuff + len, "lang");
+
+	    (*dyn_libintl_bindtextdomain)(VIMPACKAGE, szBuff);
+	    (*dyn_libintl_textdomain)(VIMPACKAGE);
+	}
+    }
+}
+
+    static void
+dyn_gettext_free(void)
+{
+    dyn_libintl_end();
+}
+
+//
+// Use UTF-8 for gettext. Returns previous codeset.
+//
+    static char *
+set_gettext_codeset(void)
+{
+    char *prev = dyn_libintl_bind_textdomain_codeset(VIMPACKAGE, NULL);
+    prev = _strdup((prev != NULL) ? prev : "char");
+    dyn_libintl_bind_textdomain_codeset(VIMPACKAGE, "utf-8");
+
+    return prev;
+}
+
+//
+// Restore previous codeset for gettext.
+//
+    static void
+restore_gettext_codeset(char *prev)
+{
+    dyn_libintl_bind_textdomain_codeset(VIMPACKAGE, prev);
+    free(prev);
+}
+#endif // FEAT_GETTEXT
+
+//
+// Global variables
+//
+UINT      g_cRefThisDll = 0;    // Reference count of this DLL.
+HINSTANCE g_hmodThisDll = NULL;	// Handle to this DLL itself.
+
+
+//---------------------------------------------------------------------------
+// DllMain
+//---------------------------------------------------------------------------
+extern "C" int APIENTRY
+DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID  /* lpReserved */)
+{
+    switch (dwReason)
+    {
+    case DLL_PROCESS_ATTACH:
+	// Extension DLL one-time initialization
+	g_hmodThisDll = hInstance;
+	break;
+
+    case DLL_PROCESS_DETACH:
+	break;
+    }
+
+    return 1;   // ok
+}
+
+    static void
+inc_cRefThisDLL()
+{
+#ifdef FEAT_GETTEXT
+    if (g_cRefThisDll == 0)
+	dyn_gettext_load();
+#endif
+    InterlockedIncrement((LPLONG)&g_cRefThisDll);
+}
+
+    static void
+dec_cRefThisDLL()
+{
+#ifdef FEAT_GETTEXT
+    if (InterlockedDecrement((LPLONG)&g_cRefThisDll) == 0)
+	dyn_gettext_free();
+#else
+    InterlockedDecrement((LPLONG)&g_cRefThisDll);
+#endif
+}
+
+//---------------------------------------------------------------------------
+// DllCanUnloadNow
+//---------------------------------------------------------------------------
+
+STDAPI DllCanUnloadNow(void)
+{
+    return (g_cRefThisDll == 0 ? S_OK : S_FALSE);
+}
+
+STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppvOut)
+{
+    *ppvOut = NULL;
+
+    if (IsEqualIID(rclsid, CLSID_ShellExtension))
+    {
+	CShellExtClassFactory *pcf = new CShellExtClassFactory;
+
+	return pcf->QueryInterface(riid, ppvOut);
+    }
+
+    return CLASS_E_CLASSNOTAVAILABLE;
+}
+
+CShellExtClassFactory::CShellExtClassFactory()
+{
+    m_cRef = 0L;
+
+    inc_cRefThisDLL();
+}
+
+CShellExtClassFactory::~CShellExtClassFactory()
+{
+    dec_cRefThisDLL();
+}
+
+STDMETHODIMP CShellExtClassFactory::QueryInterface(REFIID riid,
+						   LPVOID FAR *ppv)
+{
+    *ppv = NULL;
+
+    // any interface on this object is the object pointer
+
+    if (IsEqualIID(riid, IID_IUnknown) || IsEqualIID(riid, IID_IClassFactory))
+    {
+	*ppv = (LPCLASSFACTORY)this;
+
+	AddRef();
+
+	return NOERROR;
+    }
+
+    return E_NOINTERFACE;
+}
+
+STDMETHODIMP_(ULONG) CShellExtClassFactory::AddRef()
+{
+    return InterlockedIncrement((LPLONG)&m_cRef);
+}
+
+STDMETHODIMP_(ULONG) CShellExtClassFactory::Release()
+{
+    if (InterlockedDecrement((LPLONG)&m_cRef))
+	return m_cRef;
+
+    delete this;
+
+    return 0L;
+}
+
+STDMETHODIMP CShellExtClassFactory::CreateInstance(LPUNKNOWN pUnkOuter,
+						      REFIID riid,
+						      LPVOID *ppvObj)
+{
+    *ppvObj = NULL;
+
+    // Shell extensions typically don't support aggregation (inheritance)
+
+    if (pUnkOuter)
+	return CLASS_E_NOAGGREGATION;
+
+    // Create the main shell extension object.  The shell will then call
+    // QueryInterface with IID_IShellExtInit--this is how shell extensions are
+    // initialized.
+
+    LPCSHELLEXT pShellExt = new CShellExt();  // create the CShellExt object
+
+    if (NULL == pShellExt)
+	return E_OUTOFMEMORY;
+
+    return pShellExt->QueryInterface(riid, ppvObj);
+}
+
+
+STDMETHODIMP CShellExtClassFactory::LockServer(BOOL  /* fLock */)
+{
+    return NOERROR;
+}
+
+// *********************** CShellExt *************************
+CShellExt::CShellExt()
+{
+    m_cRef = 0L;
+    m_pDataObj = NULL;
+
+    inc_cRefThisDLL();
+
+    LoadMenuIcon();
+}
+
+CShellExt::~CShellExt()
+{
+    if (m_pDataObj)
+	m_pDataObj->Release();
+
+    dec_cRefThisDLL();
+
+    if (m_hVimIconBitmap)
+	DeleteObject(m_hVimIconBitmap);
+}
+
+STDMETHODIMP CShellExt::QueryInterface(REFIID riid, LPVOID FAR *ppv)
+{
+    *ppv = NULL;
+
+    if (IsEqualIID(riid, IID_IShellExtInit) || IsEqualIID(riid, IID_IUnknown))
+    {
+	*ppv = (LPSHELLEXTINIT)this;
+    }
+    else if (IsEqualIID(riid, IID_IContextMenu))
+    {
+	*ppv = (LPCONTEXTMENU)this;
+    }
+
+    if (*ppv)
+    {
+	AddRef();
+
+	return NOERROR;
+    }
+
+    return E_NOINTERFACE;
+}
+
+STDMETHODIMP_(ULONG) CShellExt::AddRef()
+{
+    return InterlockedIncrement((LPLONG)&m_cRef);
+}
+
+STDMETHODIMP_(ULONG) CShellExt::Release()
+{
+
+    if (InterlockedDecrement((LPLONG)&m_cRef))
+	return m_cRef;
+
+    delete this;
+
+    return 0L;
+}
+
+
+//
+//  FUNCTION: CShellExt::Initialize(LPCITEMIDLIST, LPDATAOBJECT, HKEY)
+//
+//  PURPOSE: Called by the shell when initializing a context menu or property
+//	     sheet extension.
+//
+//  PARAMETERS:
+//    pIDFolder - Specifies the parent folder
+//    pDataObj  - Specifies the set of items selected in that folder.
+//    hRegKey   - Specifies the type of the focused item in the selection.
+//
+//  RETURN VALUE:
+//
+//    NOERROR in all cases.
+//
+//  COMMENTS:   Note that at the time this function is called, we don't know
+//		(or care) what type of shell extension is being initialized.
+//		It could be a context menu or a property sheet.
+//
+
+STDMETHODIMP CShellExt::Initialize(LPCITEMIDLIST  /* pIDFolder */,
+				   LPDATAOBJECT pDataObj,
+				   HKEY  /* hRegKey */)
+{
+    // Initialize can be called more than once
+    if (m_pDataObj)
+	m_pDataObj->Release();
+
+    // duplicate the object pointer and registry handle
+
+    if (pDataObj)
+    {
+	m_pDataObj = pDataObj;
+	pDataObj->AddRef();
+    }
+
+    return NOERROR;
+}
+
+
+//
+//  FUNCTION: CShellExt::QueryContextMenu(HMENU, UINT, UINT, UINT, UINT)
+//
+//  PURPOSE: Called by the shell just before the context menu is displayed.
+//	     This is where you add your specific menu items.
+//
+//  PARAMETERS:
+//    hMenu      - Handle to the context menu
+//    indexMenu  - Index of where to begin inserting menu items
+//    idCmdFirst - Lowest value for new menu ID's
+//    idCmtLast  - Highest value for new menu ID's
+//    uFlags     - Specifies the context of the menu event
+//
+//  RETURN VALUE:
+//
+//
+//  COMMENTS:
+//
+
+STDMETHODIMP CShellExt::QueryContextMenu(HMENU hMenu,
+					 UINT indexMenu,
+					 UINT idCmdFirst,
+					 UINT  /* idCmdLast */,
+					 UINT  /* uFlags */)
+{
+    UINT idCmd = idCmdFirst;
+
+    hres = m_pDataObj->GetData(&fmte, &medium);
+    if (medium.hGlobal)
+	cbFiles = DragQueryFileW((HDROP)medium.hGlobal, (UINT)-1, 0, 0);
+
+    // InsertMenu(hMenu, indexMenu++, MF_SEPARATOR|MF_BYPOSITION, 0, NULL);
+
+    // Initialize m_cntOfHWnd to 0
+    m_cntOfHWnd = 0;
+
+    HKEY keyhandle;
+    bool showExisting = true;
+    bool showIcons = true;
+
+    // Check whether "Edit with existing Vim" entries are disabled.
+    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Vim\\Gvim", 0,
+				       KEY_READ, &keyhandle) == ERROR_SUCCESS)
+    {
+	if (RegQueryValueEx(keyhandle, "DisableEditWithExisting", 0, NULL,
+						 NULL, NULL) == ERROR_SUCCESS)
+	    showExisting = false;
+	if (RegQueryValueEx(keyhandle, "DisableContextMenuIcons", 0, NULL,
+						 NULL, NULL) == ERROR_SUCCESS)
+	    showIcons = false;
+	RegCloseKey(keyhandle);
+    }
+
+    // Use UTF-8 for gettext.
+    char *prev = set_gettext_codeset();
+
+    // Retrieve all the vim instances, unless disabled.
+    if (showExisting)
+	EnumWindows(EnumWindowsProc, (LPARAM)this);
+
+    MENUITEMINFOW mii = { sizeof(MENUITEMINFOW) };
+    mii.fMask = MIIM_STRING | MIIM_ID;
+    if (showIcons)
+    {
+	mii.fMask |= MIIM_BITMAP;
+	mii.hbmpItem = m_hVimIconBitmap;
+    }
+
+    if (cbFiles > 1)
+    {
+	mii.wID = idCmd++;
+	mii.dwTypeData = W(_("Edit with Vim using &tabpages"));
+	mii.cch = wcslen(mii.dwTypeData);
+	InsertMenuItemW(hMenu, indexMenu++, TRUE, &mii);
+	free(mii.dwTypeData);
+
+	mii.wID = idCmd++;
+	mii.dwTypeData = W(_("Edit with single &Vim"));
+	mii.cch = wcslen(mii.dwTypeData);
+	InsertMenuItemW(hMenu, indexMenu++, TRUE, &mii);
+	free(mii.dwTypeData);
+
+	if (cbFiles <= 4)
+	{
+	    // Can edit up to 4 files in diff mode
+	    mii.wID = idCmd++;
+	    mii.dwTypeData = W(_("Diff with Vim"));
+	    mii.cch = wcslen(mii.dwTypeData);
+	    InsertMenuItemW(hMenu, indexMenu++, TRUE, &mii);
+	    free(mii.dwTypeData);
+	    m_edit_existing_off = 3;
+	}
+	else
+	    m_edit_existing_off = 2;
+
+    }
+    else
+    {
+	mii.wID = idCmd++;
+	mii.dwTypeData = W(_("Edit with &Vim"));
+	mii.cch = wcslen(mii.dwTypeData);
+	InsertMenuItemW(hMenu, indexMenu++, TRUE, &mii);
+	free(mii.dwTypeData);
+	m_edit_existing_off = 1;
+    }
+
+    HMENU hSubMenu = NULL;
+    if (m_cntOfHWnd > 1)
+    {
+	hSubMenu = CreatePopupMenu();
+	mii.fMask |= MIIM_SUBMENU;
+	mii.wID = idCmd;
+	mii.dwTypeData = W(_("Edit with existing Vim"));
+	mii.cch = wcslen(mii.dwTypeData);
+	mii.hSubMenu = hSubMenu;
+	InsertMenuItemW(hMenu, indexMenu++, TRUE, &mii);
+	free(mii.dwTypeData);
+	mii.fMask = mii.fMask & ~MIIM_SUBMENU;
+	mii.hSubMenu = NULL;
+    }
+    // Now display all the vim instances
+    for (int i = 0; i < m_cntOfHWnd; i++)
+    {
+	WCHAR title[BUFSIZE];
+	WCHAR temp[BUFSIZE];
+	int index;
+	HMENU hmenu;
+
+	// Obtain window title, continue if can not
+	if (GetWindowTextW(m_hWnd[i], title, BUFSIZE - 1) == 0)
+	    continue;
+	// Truncate the title before the path, keep the file name
+	WCHAR *pos = wcschr(title, L'(');
+	if (pos != NULL)
+	{
+	    if (pos > title && pos[-1] == L' ')
+		--pos;
+	    *pos = 0;
+	}
+	// Now concatenate
+	if (m_cntOfHWnd > 1)
+	    temp[0] = L'\0';
+	else
+	{
+	    WCHAR *s = W(_("Edit with existing Vim - "));
+	    wcsncpy(temp, s, BUFSIZE - 1);
+	    temp[BUFSIZE - 1] = L'\0';
+	    free(s);
+	}
+	wcsncat(temp, title, BUFSIZE - 1 - wcslen(temp));
+	temp[BUFSIZE - 1] = L'\0';
+
+	mii.wID = idCmd++;
+	mii.dwTypeData = temp;
+	mii.cch = wcslen(mii.dwTypeData);
+	if (m_cntOfHWnd > 1)
+	{
+	    hmenu = hSubMenu;
+	    index = i;
+	}
+	else
+	{
+	    hmenu = hMenu;
+	    index = indexMenu++;
+	}
+	InsertMenuItemW(hmenu, index, TRUE, &mii);
+    }
+    // InsertMenu(hMenu, indexMenu++, MF_SEPARATOR|MF_BYPOSITION, 0, NULL);
+
+    // Restore previous codeset.
+    restore_gettext_codeset(prev);
+
+    // Must return number of menu items we added.
+    return ResultFromShort(idCmd-idCmdFirst);
+}
+
+//
+//  FUNCTION: CShellExt::InvokeCommand(LPCMINVOKECOMMANDINFO)
+//
+//  PURPOSE: Called by the shell after the user has selected on of the
+//	     menu items that was added in QueryContextMenu().
+//
+//  PARAMETERS:
+//    lpcmi - Pointer to an CMINVOKECOMMANDINFO structure
+//
+//  RETURN VALUE:
+//
+//
+//  COMMENTS:
+//
+
+STDMETHODIMP CShellExt::InvokeCommand(LPCMINVOKECOMMANDINFO lpcmi)
+{
+    HRESULT hr = E_INVALIDARG;
+    int gvimExtraOptions;
+
+    // If HIWORD(lpcmi->lpVerb) then we have been called programmatically
+    // and lpVerb is a command that should be invoked.  Otherwise, the shell
+    // has called us, and LOWORD(lpcmi->lpVerb) is the menu ID the user has
+    // selected.  Actually, it's (menu ID - idCmdFirst) from QueryContextMenu().
+    if (!HIWORD(lpcmi->lpVerb))
+    {
+	UINT idCmd = LOWORD(lpcmi->lpVerb);
+
+	if (idCmd >= m_edit_existing_off)
+	{
+	    // Existing with vim instance
+	    hr = PushToWindow(lpcmi->hwnd,
+		    lpcmi->lpDirectory,
+		    lpcmi->lpVerb,
+		    lpcmi->lpParameters,
+		    lpcmi->nShow,
+		    idCmd - m_edit_existing_off);
+	}
+	else
+	{
+	    switch (idCmd)
+	    {
+		case 0:
+		    gvimExtraOptions = EDIT_WITH_VIM_USE_TABPAGES;
+		    break;
+		case 1:
+		    gvimExtraOptions = EDIT_WITH_VIM_NO_OPTIONS;
+		    break;
+		case 2:
+		    gvimExtraOptions = EDIT_WITH_VIM_IN_DIFF_MODE;
+		    break;
+		default:
+		    // If execution reaches this point we likely have an
+		    // inconsistency between the code that setup the menus
+		    // and this code that determines what the user
+		    // selected.  This should be detected and fixed during 
+		    // development.
+		    return E_FAIL;
+	    }
+
+            LPCMINVOKECOMMANDINFOEX lpcmiex = (LPCMINVOKECOMMANDINFOEX)lpcmi;
+            LPCWSTR currentDirectory = lpcmi->cbSize == sizeof(CMINVOKECOMMANDINFOEX) ? lpcmiex->lpDirectoryW : NULL;
+
+	    hr = InvokeSingleGvim(lpcmi->hwnd,
+		    currentDirectory,
+		    lpcmi->lpVerb,
+		    lpcmi->lpParameters,
+		    lpcmi->nShow,
+		    gvimExtraOptions);
+	}
+    }
+    return hr;
+}
+
+STDMETHODIMP CShellExt::PushToWindow(HWND  /* hParent */,
+				   LPCSTR  /* pszWorkingDir */,
+				   LPCSTR  /* pszCmd */,
+				   LPCSTR  /* pszParam */,
+				   int  /* iShowCmd */,
+				   int idHWnd)
+{
+    HWND hWnd = m_hWnd[idHWnd];
+
+    // Show and bring vim instance to foreground
+    if (IsIconic(hWnd) != 0)
+	ShowWindow(hWnd, SW_RESTORE);
+    else
+	ShowWindow(hWnd, SW_SHOW);
+    SetForegroundWindow(hWnd);
+
+    // Post the selected files to the vim instance
+    PostMessage(hWnd, WM_DROPFILES, (WPARAM)medium.hGlobal, 0);
+
+    return NOERROR;
+}
+
+STDMETHODIMP CShellExt::GetCommandString(UINT_PTR  /* idCmd */,
+					 UINT uFlags,
+					 UINT FAR * /* reserved */,
+					 LPSTR pszName,
+					 UINT cchMax)
+{
+    // Use UTF-8 for gettext.
+    char *prev = set_gettext_codeset();
+
+    WCHAR *s = W(_("Edits the selected file(s) with Vim"));
+    if (uFlags == GCS_HELPTEXTW && cchMax > wcslen(s))
+	wcscpy((WCHAR *)pszName, s);
+    free(s);
+
+    // Restore previous codeset.
+    restore_gettext_codeset(prev);
+
+    return NOERROR;
+}
+
+BOOL CALLBACK CShellExt::EnumWindowsProc(HWND hWnd, LPARAM lParam)
+{
+    char temp[BUFSIZE];
+
+    // First do a bunch of check
+    // No invisible window
+    if (!IsWindowVisible(hWnd))
+	return TRUE;
+    // No child window ???
+    // if (GetParent(hWnd)) return TRUE;
+    // Class name should be Vim, if failed to get class name, return
+    if (GetClassName(hWnd, temp, sizeof(temp)) == 0)
+	return TRUE;
+    // Compare class name to that of vim, if not, return
+    if (_strnicmp(temp, "vim", sizeof("vim")) != 0)
+	return TRUE;
+    // First check if the number of vim instance exceeds MAX_HWND
+    CShellExt *cs = (CShellExt*) lParam;
+    if (cs->m_cntOfHWnd >= MAX_HWND)
+	return FALSE;	// stop enumeration
+    // Now we get the vim window, put it into some kind of array
+    cs->m_hWnd[cs->m_cntOfHWnd] = hWnd;
+    cs->m_cntOfHWnd ++;
+
+    return TRUE; // continue enumeration (otherwise this would be false)
+}
+
+BOOL CShellExt::LoadMenuIcon()
+{
+    char vimExeFile[BUFSIZE];
+    getGvimName(vimExeFile, 1);
+    if (vimExeFile[0] == '\0')
+	return FALSE;
+    HICON hVimIcon;
+    if (ExtractIconEx(vimExeFile, 0, NULL, &hVimIcon, 1) == 0)
+	return FALSE;
+    m_hVimIconBitmap = IconToBitmap(hVimIcon,
+	    GetSysColorBrush(COLOR_MENU),
+	    GetSystemMetrics(SM_CXSMICON),
+	    GetSystemMetrics(SM_CYSMICON));
+    return TRUE;
+}
+
+    static char *
+searchpath(char *name)
+{
+    static char widename[2 * BUFSIZE];
+    static char location[2 * BUFSIZE + 2];
+
+    // There appears to be a bug in FindExecutableA() on Windows NT.
+    // Use FindExecutableW() instead...
+    MultiByteToWideChar(CP_ACP, 0, (LPCSTR)name, -1,
+	    (LPWSTR)widename, BUFSIZE);
+    if (FindExecutableW((LPCWSTR)widename, (LPCWSTR)"",
+		(LPWSTR)location) > (HINSTANCE)32)
+    {
+	WideCharToMultiByte(CP_ACP, 0, (LPWSTR)location, -1,
+		(LPSTR)widename, 2 * BUFSIZE, NULL, NULL);
+	return widename;
+    }
+    return (char *)"";
+}
+
+
+STDMETHODIMP CShellExt::InvokeSingleGvim(HWND hParent,
+				   LPCWSTR  workingDir,
+				   LPCSTR  /* pszCmd */,
+				   LPCSTR  /* pszParam */,
+				   int  /* iShowCmd */,
+				   int gvimExtraOptions)
+{
+    wchar_t	m_szFileUserClickedOn[BUFSIZE];
+    wchar_t	*cmdStrW;
+    size_t	cmdlen;
+    size_t	len;
+    UINT i;
+
+    cmdlen = BUFSIZE;
+    cmdStrW  = (wchar_t *) malloc(cmdlen * sizeof(wchar_t));
+    if (cmdStrW == NULL)
+	return E_FAIL;
+    getGvimInvocationW(cmdStrW);
+
+    if (gvimExtraOptions == EDIT_WITH_VIM_IN_DIFF_MODE)
+	wcscat(cmdStrW, L" -d");
+    else if (gvimExtraOptions == EDIT_WITH_VIM_USE_TABPAGES)
+	wcscat(cmdStrW, L" -p");
+    for (i = 0; i < cbFiles; i++)
+    {
+	DragQueryFileW((HDROP)medium.hGlobal,
+		i,
+		m_szFileUserClickedOn,
+		sizeof(m_szFileUserClickedOn));
+
+	len = wcslen(cmdStrW) + wcslen(m_szFileUserClickedOn) + 4;
+	if (len > cmdlen)
+	{
+	    cmdlen = len + BUFSIZE;
+	    wchar_t *cmdStrW_new = (wchar_t *)realloc(cmdStrW, cmdlen * sizeof(wchar_t));
+	    if (cmdStrW_new == NULL)
+	    {
+		free(cmdStrW);
+		return E_FAIL;
+	    }
+	    cmdStrW = cmdStrW_new;
+	}
+	wcscat(cmdStrW, L" \"");
+	wcscat(cmdStrW, m_szFileUserClickedOn);
+	wcscat(cmdStrW, L"\"");
+    }
+
+    STARTUPINFOW si;
+    PROCESS_INFORMATION pi;
+
+    ZeroMemory(&si, sizeof(si));
+    si.cb = sizeof(si);
+
+    // Start the child process.
+    if (!CreateProcessW(NULL,	// No module name (use command line).
+		cmdStrW,	// Command line.
+		NULL,		// Process handle not inheritable.
+		NULL,		// Thread handle not inheritable.
+		FALSE,		// Set handle inheritance to FALSE.
+		0,		// No creation flags.
+		NULL,		// Use parent's environment block.
+		workingDir,	// Use parent's starting directory.
+		&si,		// Pointer to STARTUPINFO structure.
+		&pi)		// Pointer to PROCESS_INFORMATION structure.
+       )
+    {
+	// Use UTF-8 for gettext.
+	char *prev = set_gettext_codeset();
+
+	WCHAR *msg = W(_("Error creating process: Check if gvim is in your path!"));
+	WCHAR *title = W(_("gvimext.dll error"));
+
+	MessageBoxW(hParent, msg, title, MB_OK);
+
+	free(msg);
+	free(title);
+
+	// Restore previous codeset.
+	restore_gettext_codeset(prev);
+    }
+    else
+    {
+	CloseHandle(pi.hProcess);
+	CloseHandle(pi.hThread);
+    }
+    free(cmdStrW);
+
+    return NOERROR;
+}