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+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved		by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ */
+
+/*
+ * DESCRIPTION:
+ * This module produces Global IME for Vim, on Windows with Internet
+ * Explorer 5.01 or higher.  You need three files "dimm.idl", "dimm.h", and
+ * "dimm_i.c" when compile this module at your self.  "dimm.h", and
+ * "dimm_i.c" are generated from "dimm.idl" by using MIDL.EXE as like
+ * "if_ole.h".  You can get "dimm.idl" in MSDN web site.  I got it below
+ * URL.
+ *
+ * WHAT IS THE GLOBAL IME?:
+ * Global IME makes capability input Chinese, Japanese, and Korean text into
+ * Vim buffer on any language version of Windows 98, Windows 95, and Windows
+ * NT 4.0.  See below URL for detail of Global IME.  You can also find
+ * various laguage version of Global IME at same place.
+ *
+ * RUNTIME REQUIREMENTS:
+ * - Internet Exproler 5.01 or higher.
+ * - Global IME (with language pack?).
+ * - Of course Vim for Windows.
+ *
+ * URLS:
+ * - Where you can probably get "dimm.idl".
+ * http://msdn.microsoft.com/downloads/samples/internet/libraries/ie5_lib/sample.asp
+ * - Global IME detailed information.
+ * http://www.microsoft.com/windows/ie/features/ime.asp
+ */
+
+#ifdef GLOBAL_IME
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <objbase.h>
+extern "C" {
+#include "vim.h"
+}
+#include "dimm.h"
+#include "glbl_ime.h"
+
+static IActiveIMMApp *pIApp = NULL;
+static IActiveIMMMessagePumpOwner *pIMsg = NULL;
+static HWND s_hWnd = NULL;
+static BOOL s_bStatus = FALSE; /* for evacuate */
+
+/*
+ * Initialize Global IME.
+ * "atom" must be return value of RegisterClass(Ex).
+ */
+    void
+global_ime_init(ATOM atom, HWND hWnd)
+{
+    IUnknown *pI;
+    HRESULT hr;
+
+    if (pIApp != NULL || pIMsg != NULL)
+	return;
+    OleInitialize(NULL);
+
+    /*
+     * Get interface IUnknown
+     */
+    hr = CoCreateInstance(CLSID_CActiveIMM, NULL, CLSCTX_SERVER,
+	    IID_IUnknown, (void**)&pI);
+    if (FAILED(hr) || !pI)
+	return;
+
+    /*
+     * Get interface IActiveIMMApp
+     */
+    hr = pI->QueryInterface(IID_IActiveIMMApp, (void**)&pIApp);
+    if (FAILED(hr))
+	pIApp = NULL;
+
+    /*
+     * Get interface IActiveIMMMessagePumpOwner
+     */
+    hr = pI->QueryInterface(IID_IActiveIMMMessagePumpOwner, (void**)&pIMsg);
+    if (FAILED(hr))
+	pIMsg = NULL;
+
+    if (pIApp != NULL)
+    {
+	pIApp->Activate(TRUE);
+	pIApp->FilterClientWindows(&atom, 1);
+    }
+    if (pIMsg != NULL)
+	pIMsg->Start();
+
+    pI->Release();
+    s_hWnd = hWnd;
+}
+
+/*
+ * Reset and clear Global IME.
+ */
+    void
+global_ime_end()
+{
+    if (pIApp != NULL)
+    {
+	IActiveIMMApp *p = pIApp;
+
+	pIApp = NULL;
+	p->FilterClientWindows(NULL, 0);
+	p->Deactivate();
+	p->Release();
+    }
+    if (pIMsg != NULL)
+    {
+	IActiveIMMMessagePumpOwner *p = pIMsg;
+
+	pIMsg = NULL;
+	p->End();
+	p->Release();
+    }
+    OleUninitialize();
+}
+
+/*
+ * Replacement for DefWindowProc().
+ */
+    LRESULT WINAPI
+global_ime_DefWindowProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
+{
+    LRESULT lResult;
+
+    if (pIApp == NULL || pIApp->OnDefWindowProc(hWnd, Msg,
+					    wParam, lParam, &lResult) != S_OK)
+    {
+#if defined(WIN3264) && defined(FEAT_MBYTE)
+	if (wide_WindowProc)
+	    lResult = DefWindowProcW(hwnd, Msg, wParam, lParam);
+	else
+#endif
+	    lResult = DefWindowProc(hWnd, Msg, wParam, lParam);
+    }
+    return lResult;
+}
+
+/*
+ * Replace with TranslateMessage()
+ */
+    BOOL WINAPI
+global_ime_TranslateMessage(CONST MSG *lpMsg)
+{
+    if (pIMsg == NULL || pIMsg->OnTranslateMessage(lpMsg) == S_FALSE)
+	return TranslateMessage(lpMsg);
+    return TRUE;
+}
+
+/*
+ * Set position of IME compotision window.
+ *
+ * You have to call this before starting composition.  If once composition
+ * started, this can take no effect until that composition have finised.  So
+ * you should handle WM_IME_STARTCOMPOSITION and call this function.
+ */
+    void WINAPI
+global_ime_set_position(POINT *pPoint)
+{
+    HIMC hImc = NULL;
+
+    if (pIApp == NULL || pPoint == NULL)
+	return;
+
+    if (SUCCEEDED(pIApp->GetContext(s_hWnd, &hImc)))
+    {
+	COMPOSITIONFORM CompForm;
+
+	CompForm.dwStyle = CFS_POINT;
+	CompForm.ptCurrentPos = *pPoint;
+	pIApp->SetCompositionWindow(hImc, &CompForm);
+	pIApp->ReleaseContext(s_hWnd, hImc);
+    }
+}
+
+/*
+ * Set font to Global IME
+ */
+/* GIME_TEST */
+    void WINAPI
+global_ime_set_font(LOGFONT *pFont)
+{
+    HIMC hImc = NULL;
+
+    if (pIApp == NULL || pFont == NULL)
+	return;
+
+    if (SUCCEEDED(pIApp->GetContext(s_hWnd, &hImc)))
+    {
+	pIApp->SetCompositionFontA(hImc, pFont);
+	pIApp->ReleaseContext(s_hWnd, hImc);
+    }
+}
+
+/*
+ * for IME control.  Save current status of IME, and set force new-status to
+ * Engllish (turn off).
+ */
+    void WINAPI
+global_ime_status_evacuate()
+{
+    HIMC    hImc;
+
+    if (pIApp != NULL && SUCCEEDED(pIApp->GetContext(s_hWnd, &hImc)))
+    {
+	s_bStatus = (pIApp->GetOpenStatus(hImc) == 0) ? TRUE : FALSE;
+	pIApp->SetOpenStatus(hImc, FALSE);
+	pIApp->ReleaseContext(s_hWnd, hImc);
+    }
+}
+
+/*
+ * for IME control.  Change IME status to last saved one.
+ */
+    void WINAPI
+global_ime_status_restore()
+{
+    HIMC    hImc;
+
+    if (pIApp != NULL && SUCCEEDED(pIApp->GetContext(s_hWnd, &hImc)))
+    {
+	pIApp->SetOpenStatus(hImc, s_bStatus);
+	pIApp->ReleaseContext(s_hWnd, hImc);
+    }
+}
+
+    void WINAPI
+global_ime_set_status(int status)
+{
+    HIMC    hImc;
+
+    if (pIApp != NULL && SUCCEEDED(pIApp->GetContext(s_hWnd, &hImc)))
+    {
+	pIApp->SetOpenStatus(hImc, status ? TRUE : FALSE);
+	pIApp->ReleaseContext(s_hWnd, hImc);
+    }
+}
+
+    int WINAPI
+global_ime_get_status()
+{
+    int status = 0;
+    HIMC    hImc;
+
+    if (pIApp != NULL && SUCCEEDED(pIApp->GetContext(s_hWnd, &hImc)))
+    {
+	status = pIApp->GetOpenStatus(hImc) ? 1 : 0;
+	pIApp->ReleaseContext(s_hWnd, hImc);
+    }
+    return status;
+}
+
+#endif /* GLOBAL_IME */