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SDL_windowskeyboard.c
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SDL_windowskeyboard.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"
#if defined(SDL_VIDEO_DRIVER_WINDOWS) && !defined(SDL_PLATFORM_XBOXONE) && !defined(SDL_PLATFORM_XBOXSERIES)
#include "SDL_windowsvideo.h"
#include "../../events/SDL_keyboard_c.h"
#include "../../events/scancodes_windows.h"
#include <imm.h>
#include <oleauto.h>
#ifndef SDL_DISABLE_WINDOWS_IME
static int IME_Init(SDL_VideoData *videodata, HWND hwnd);
static void IME_Enable(SDL_VideoData *videodata, HWND hwnd);
static void IME_Disable(SDL_VideoData *videodata, HWND hwnd);
static void IME_Quit(SDL_VideoData *videodata);
static SDL_bool IME_IsTextInputShown(SDL_VideoData *videodata);
#endif /* !SDL_DISABLE_WINDOWS_IME */
#ifndef MAPVK_VK_TO_VSC
#define MAPVK_VK_TO_VSC 0
#endif
#ifndef MAPVK_VSC_TO_VK
#define MAPVK_VSC_TO_VK 1
#endif
/* Alphabetic scancodes for PC keyboards */
void WIN_InitKeyboard(SDL_VideoDevice *_this)
{
#ifndef SDL_DISABLE_WINDOWS_IME
SDL_VideoData *data = _this->driverdata;
data->ime_com_initialized = SDL_FALSE;
data->ime_threadmgr = 0;
data->ime_initialized = SDL_FALSE;
data->ime_enabled = SDL_FALSE;
data->ime_available = SDL_FALSE;
data->ime_hwnd_main = 0;
data->ime_hwnd_current = 0;
data->ime_himc = 0;
data->ime_composition_length = 32 * sizeof(WCHAR);
data->ime_composition = (WCHAR *)SDL_malloc(data->ime_composition_length + sizeof(WCHAR));
data->ime_composition[0] = 0;
data->ime_readingstring[0] = 0;
data->ime_cursor = 0;
data->ime_candlist = SDL_FALSE;
data->ime_candidates = NULL;
data->ime_candcount = 0;
data->ime_candref = 0;
data->ime_candsel = 0;
data->ime_candpgsize = 0;
data->ime_candlistindexbase = 0;
data->ime_candvertical = SDL_TRUE;
data->ime_dirty = SDL_FALSE;
SDL_memset(&data->ime_rect, 0, sizeof(data->ime_rect));
SDL_memset(&data->ime_candlistrect, 0, sizeof(data->ime_candlistrect));
data->ime_winwidth = 0;
data->ime_winheight = 0;
data->ime_hkl = 0;
data->ime_himm32 = 0;
data->GetReadingString = 0;
data->ShowReadingWindow = 0;
data->ImmLockIMC = 0;
data->ImmUnlockIMC = 0;
data->ImmLockIMCC = 0;
data->ImmUnlockIMCC = 0;
data->ime_uiless = SDL_FALSE;
data->ime_threadmgrex = 0;
data->ime_uielemsinkcookie = TF_INVALID_COOKIE;
data->ime_alpnsinkcookie = TF_INVALID_COOKIE;
data->ime_openmodesinkcookie = TF_INVALID_COOKIE;
data->ime_convmodesinkcookie = TF_INVALID_COOKIE;
data->ime_uielemsink = 0;
data->ime_ippasink = 0;
#endif /* !SDL_DISABLE_WINDOWS_IME */
WIN_UpdateKeymap(SDL_FALSE);
SDL_SetScancodeName(SDL_SCANCODE_APPLICATION, "Menu");
SDL_SetScancodeName(SDL_SCANCODE_LGUI, "Left Windows");
SDL_SetScancodeName(SDL_SCANCODE_RGUI, "Right Windows");
/* Are system caps/num/scroll lock active? Set our state to match. */
SDL_ToggleModState(SDL_KMOD_CAPS, (GetKeyState(VK_CAPITAL) & 0x0001) ? SDL_TRUE : SDL_FALSE);
SDL_ToggleModState(SDL_KMOD_NUM, (GetKeyState(VK_NUMLOCK) & 0x0001) ? SDL_TRUE : SDL_FALSE);
SDL_ToggleModState(SDL_KMOD_SCROLL, (GetKeyState(VK_SCROLL) & 0x0001) ? SDL_TRUE : SDL_FALSE);
}
void WIN_UpdateKeymap(SDL_bool send_event)
{
int i;
SDL_Scancode scancode;
SDL_Keycode keymap[SDL_NUM_SCANCODES];
SDL_GetDefaultKeymap(keymap);
WIN_ResetDeadKeys();
for (i = 0; i < SDL_arraysize(windows_scancode_table); i++) {
Uint8 vk;
Uint16 sc;
/* Make sure this scancode is a valid character scancode */
scancode = windows_scancode_table[i];
if (scancode == SDL_SCANCODE_UNKNOWN) {
continue;
}
/* If this key is one of the non-mappable keys, ignore it */
/* Uncomment the third part to re-enable the behavior of not mapping the "`"(grave) key to the users actual keyboard layout */
if ((keymap[scancode] & SDLK_SCANCODE_MASK) || scancode == SDL_SCANCODE_DELETE /*|| scancode == SDL_SCANCODE_GRAVE*/) {
continue;
}
/* Unpack the single byte index to make the scan code. */
sc = MAKEWORD(i & 0x7f, (i & 0x80) ? 0xe0 : 0x00);
vk = LOBYTE(MapVirtualKey(sc, MAPVK_VSC_TO_VK));
if (!vk) {
continue;
}
/* Always map VK_A..VK_Z to SDLK_a..SDLK_z codes.
* This was behavior with MapVirtualKey(MAPVK_VK_TO_CHAR). */
//if (vk >= 'A' && vk <= 'Z') {
// keymap[scancode] = SDLK_a + (vk - 'A');
//} else {
{
BYTE keyboardState[256] = { 0 };
WCHAR buffer[16] = { 0 };
Uint32 *ch = 0;
int result = ToUnicode(vk, sc, keyboardState, buffer, 16, 0);
buffer[SDL_abs(result)] = 0;
/* Convert UTF-16 to UTF-32 code points */
ch = (Uint32 *)SDL_iconv_string("UTF-32LE", "UTF-16LE", (const char *)buffer, (SDL_abs(result) + 1) * sizeof(WCHAR));
if (ch) {
if (ch[0] != 0 && ch[1] != 0) {
/* We have several UTF-32 code points on a single key press.
* Cannot fit into single SDL_Keycode in keymap.
* See https://kbdlayout.info/features/ligatures */
keymap[scancode] = 0xfffd; /* U+FFFD REPLACEMENT CHARACTER */
} else {
keymap[scancode] = ch[0];
}
SDL_free(ch);
}
if (result < 0) {
WIN_ResetDeadKeys();
}
}
}
SDL_SetKeymap(0, keymap, SDL_NUM_SCANCODES, send_event);
}
void WIN_QuitKeyboard(SDL_VideoDevice *_this)
{
SDL_VideoData *data = _this->driverdata;
#ifndef SDL_DISABLE_WINDOWS_IME
IME_Quit(data);
if (data->ime_composition) {
SDL_free(data->ime_composition);
data->ime_composition = NULL;
}
#endif /* !SDL_DISABLE_WINDOWS_IME */
}
void WIN_ResetDeadKeys()
{
/*
if a deadkey has been typed, but not the next character (which the deadkey might modify),
this tries to undo the effect pressing the deadkey.
see: http://archives.miloush.net/michkap/archive/2006/09/10/748775.html
*/
BYTE keyboardState[256];
WCHAR buffer[16];
int vk, sc, result, i;
if (!GetKeyboardState(keyboardState)) {
return;
}
vk = VK_SPACE;
sc = MapVirtualKey(vk, MAPVK_VK_TO_VSC);
if (sc == 0) {
/* the keyboard doesn't have this key */
return;
}
for (i = 0; i < 5; i++) {
result = ToUnicode(vk, sc, keyboardState, buffer, 16, 0);
if (result > 0) {
/* success */
return;
}
}
}
void WIN_StartTextInput(SDL_VideoDevice *_this)
{
#ifndef SDL_DISABLE_WINDOWS_IME
SDL_Window *window;
#endif
WIN_ResetDeadKeys();
#ifndef SDL_DISABLE_WINDOWS_IME
window = SDL_GetKeyboardFocus();
if (window) {
HWND hwnd = window->driverdata->hwnd;
SDL_VideoData *videodata = _this->driverdata;
SDL_GetWindowSize(window, &videodata->ime_winwidth, &videodata->ime_winheight);
IME_Init(videodata, hwnd);
IME_Enable(videodata, hwnd);
}
#endif /* !SDL_DISABLE_WINDOWS_IME */
}
void WIN_StopTextInput(SDL_VideoDevice *_this)
{
#ifndef SDL_DISABLE_WINDOWS_IME
SDL_Window *window;
#endif
WIN_ResetDeadKeys();
#ifndef SDL_DISABLE_WINDOWS_IME
window = SDL_GetKeyboardFocus();
if (window) {
HWND hwnd = window->driverdata->hwnd;
SDL_VideoData *videodata = _this->driverdata;
IME_Init(videodata, hwnd);
IME_Disable(videodata, hwnd);
}
#endif /* !SDL_DISABLE_WINDOWS_IME */
}
int WIN_SetTextInputRect(SDL_VideoDevice *_this, const SDL_Rect *rect)
{
SDL_VideoData *videodata = _this->driverdata;
HIMC himc = 0;
#ifndef SDL_DISABLE_WINDOWS_IME
videodata->ime_rect = *rect;
himc = ImmGetContext(videodata->ime_hwnd_current);
if (himc) {
COMPOSITIONFORM cof;
CANDIDATEFORM caf;
cof.dwStyle = CFS_RECT;
cof.ptCurrentPos.x = videodata->ime_rect.x;
cof.ptCurrentPos.y = videodata->ime_rect.y;
cof.rcArea.left = videodata->ime_rect.x;
cof.rcArea.right = (LONG)videodata->ime_rect.x + videodata->ime_rect.w;
cof.rcArea.top = videodata->ime_rect.y;
cof.rcArea.bottom = (LONG)videodata->ime_rect.y + videodata->ime_rect.h;
ImmSetCompositionWindow(himc, &cof);
caf.dwIndex = 0;
caf.dwStyle = CFS_EXCLUDE;
caf.ptCurrentPos.x = videodata->ime_rect.x;
caf.ptCurrentPos.y = videodata->ime_rect.y;
caf.rcArea.left = videodata->ime_rect.x;
caf.rcArea.right = (LONG)videodata->ime_rect.x + videodata->ime_rect.w;
caf.rcArea.top = videodata->ime_rect.y;
caf.rcArea.bottom = (LONG)videodata->ime_rect.y + videodata->ime_rect.h;
ImmSetCandidateWindow(himc, &caf);
ImmReleaseContext(videodata->ime_hwnd_current, himc);
}
#endif /* !SDL_DISABLE_WINDOWS_IME */
return 0;
}
#ifdef SDL_DISABLE_WINDOWS_IME
void WIN_ClearComposition(SDL_VideoDevice *_this)
{
}
SDL_bool WIN_IsTextInputShown(SDL_VideoDevice *_this)
{
return SDL_FALSE;
}
SDL_bool IME_HandleMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM *lParam, SDL_VideoData *videodata)
{
return SDL_FALSE;
}
void IME_Present(SDL_VideoData *videodata)
{
}
#else
#ifdef SDL_msctf_h_
#define USE_INIT_GUID
#elif defined(__GNUC__)
#define USE_INIT_GUID
#endif
#ifdef USE_INIT_GUID
#undef DEFINE_GUID
#define DEFINE_GUID(n, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) static const GUID n = { l, w1, w2, { b1, b2, b3, b4, b5, b6, b7, b8 } }
DEFINE_GUID(IID_ITfInputProcessorProfileActivationSink, 0x71C6E74E, 0x0F28, 0x11D8, 0xA8, 0x2A, 0x00, 0x06, 0x5B, 0x84, 0x43, 0x5C);
DEFINE_GUID(IID_ITfUIElementSink, 0xEA1EA136, 0x19DF, 0x11D7, 0xA6, 0xD2, 0x00, 0x06, 0x5B, 0x84, 0x43, 0x5C);
DEFINE_GUID(GUID_TFCAT_TIP_KEYBOARD, 0x34745C63, 0xB2F0, 0x4784, 0x8B, 0x67, 0x5E, 0x12, 0xC8, 0x70, 0x1A, 0x31);
DEFINE_GUID(IID_ITfSource, 0x4EA48A35, 0x60AE, 0x446F, 0x8F, 0xD6, 0xE6, 0xA8, 0xD8, 0x24, 0x59, 0xF7);
DEFINE_GUID(IID_ITfUIElementMgr, 0xEA1EA135, 0x19DF, 0x11D7, 0xA6, 0xD2, 0x00, 0x06, 0x5B, 0x84, 0x43, 0x5C);
DEFINE_GUID(IID_ITfCandidateListUIElement, 0xEA1EA138, 0x19DF, 0x11D7, 0xA6, 0xD2, 0x00, 0x06, 0x5B, 0x84, 0x43, 0x5C);
DEFINE_GUID(IID_ITfReadingInformationUIElement, 0xEA1EA139, 0x19DF, 0x11D7, 0xA6, 0xD2, 0x00, 0x06, 0x5B, 0x84, 0x43, 0x5C);
DEFINE_GUID(IID_ITfThreadMgr, 0xAA80E801, 0x2021, 0x11D2, 0x93, 0xE0, 0x00, 0x60, 0xB0, 0x67, 0xB8, 0x6E);
DEFINE_GUID(CLSID_TF_ThreadMgr, 0x529A9E6B, 0x6587, 0x4F23, 0xAB, 0x9E, 0x9C, 0x7D, 0x68, 0x3E, 0x3C, 0x50);
DEFINE_GUID(IID_ITfThreadMgrEx, 0x3E90ADE3, 0x7594, 0x4CB0, 0xBB, 0x58, 0x69, 0x62, 0x8F, 0x5F, 0x45, 0x8C);
#endif
#define LANG_CHT MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_TRADITIONAL)
#define LANG_CHS MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED)
#define MAKEIMEVERSION(major, minor) ((DWORD)(((BYTE)(major) << 24) | ((BYTE)(minor) << 16)))
#define IMEID_VER(id) ((id)&0xffff0000)
#define IMEID_LANG(id) ((id)&0x0000ffff)
#define CHT_HKL_DAYI ((HKL)(UINT_PTR)0xE0060404)
#define CHT_HKL_NEW_PHONETIC ((HKL)(UINT_PTR)0xE0080404)
#define CHT_HKL_NEW_CHANG_JIE ((HKL)(UINT_PTR)0xE0090404)
#define CHT_HKL_NEW_QUICK ((HKL)(UINT_PTR)0xE00A0404)
#define CHT_HKL_HK_CANTONESE ((HKL)(UINT_PTR)0xE00B0404)
#define CHT_IMEFILENAME1 "TINTLGNT.IME"
#define CHT_IMEFILENAME2 "CINTLGNT.IME"
#define CHT_IMEFILENAME3 "MSTCIPHA.IME"
#define IMEID_CHT_VER42 (LANG_CHT | MAKEIMEVERSION(4, 2))
#define IMEID_CHT_VER43 (LANG_CHT | MAKEIMEVERSION(4, 3))
#define IMEID_CHT_VER44 (LANG_CHT | MAKEIMEVERSION(4, 4))
#define IMEID_CHT_VER50 (LANG_CHT | MAKEIMEVERSION(5, 0))
#define IMEID_CHT_VER51 (LANG_CHT | MAKEIMEVERSION(5, 1))
#define IMEID_CHT_VER52 (LANG_CHT | MAKEIMEVERSION(5, 2))
#define IMEID_CHT_VER60 (LANG_CHT | MAKEIMEVERSION(6, 0))
#define IMEID_CHT_VER_VISTA (LANG_CHT | MAKEIMEVERSION(7, 0))
#define CHS_HKL ((HKL)(UINT_PTR)0xE00E0804)
#define CHS_IMEFILENAME1 "PINTLGNT.IME"
#define CHS_IMEFILENAME2 "MSSCIPYA.IME"
#define IMEID_CHS_VER41 (LANG_CHS | MAKEIMEVERSION(4, 1))
#define IMEID_CHS_VER42 (LANG_CHS | MAKEIMEVERSION(4, 2))
#define IMEID_CHS_VER53 (LANG_CHS | MAKEIMEVERSION(5, 3))
#define LANG() LOWORD((videodata->ime_hkl))
#define PRIMLANG() ((WORD)PRIMARYLANGID(LANG()))
#define SUBLANG() SUBLANGID(LANG())
static void IME_UpdateInputLocale(SDL_VideoData *videodata);
static int IME_ShowCandidateList(SDL_VideoData *videodata);
static void IME_ClearComposition(SDL_VideoData *videodata);
static void IME_SetWindow(SDL_VideoData *videodata, HWND hwnd);
static void IME_SetupAPI(SDL_VideoData *videodata);
static DWORD IME_GetId(SDL_VideoData *videodata, UINT uIndex);
static void IME_SendEditingEvent(SDL_VideoData *videodata);
static void IME_DestroyTextures(SDL_VideoData *videodata);
static SDL_bool UILess_SetupSinks(SDL_VideoData *videodata);
static void UILess_ReleaseSinks(SDL_VideoData *videodata);
static void UILess_EnableUIUpdates(SDL_VideoData *videodata);
static void UILess_DisableUIUpdates(SDL_VideoData *videodata);
static SDL_bool WIN_ShouldShowNativeUI()
{
return SDL_GetHintBoolean(SDL_HINT_IME_SHOW_UI, SDL_FALSE);
}
static int IME_Init(SDL_VideoData *videodata, HWND hwnd)
{
HRESULT hResult = S_OK;
if (videodata->ime_initialized) {
return 0;
}
videodata->ime_hwnd_main = hwnd;
if (SUCCEEDED(WIN_CoInitialize())) {
videodata->ime_com_initialized = SDL_TRUE;
hResult = CoCreateInstance(&CLSID_TF_ThreadMgr, NULL, CLSCTX_INPROC_SERVER, &IID_ITfThreadMgr, (LPVOID *)&videodata->ime_threadmgr);
if (hResult != S_OK) {
videodata->ime_available = SDL_FALSE;
return SDL_SetError("CoCreateInstance() failed, HRESULT is %08X", (unsigned int)hResult);
}
}
videodata->ime_initialized = SDL_TRUE;
videodata->ime_himm32 = SDL_LoadObject("imm32.dll");
if (!videodata->ime_himm32) {
videodata->ime_available = SDL_FALSE;
SDL_ClearError();
return 0;
}
/* *INDENT-OFF* */ /* clang-format off */
videodata->ImmLockIMC = (LPINPUTCONTEXT2 (WINAPI *)(HIMC))SDL_LoadFunction(videodata->ime_himm32, "ImmLockIMC");
videodata->ImmUnlockIMC = (BOOL (WINAPI *)(HIMC))SDL_LoadFunction(videodata->ime_himm32, "ImmUnlockIMC");
videodata->ImmLockIMCC = (LPVOID (WINAPI *)(HIMCC))SDL_LoadFunction(videodata->ime_himm32, "ImmLockIMCC");
videodata->ImmUnlockIMCC = (BOOL (WINAPI *)(HIMCC))SDL_LoadFunction(videodata->ime_himm32, "ImmUnlockIMCC");
/* *INDENT-ON* */ /* clang-format on */
IME_SetWindow(videodata, hwnd);
videodata->ime_himc = ImmGetContext(hwnd);
ImmReleaseContext(hwnd, videodata->ime_himc);
if (!videodata->ime_himc) {
videodata->ime_available = SDL_FALSE;
IME_Disable(videodata, hwnd);
return 0;
}
videodata->ime_available = SDL_TRUE;
IME_UpdateInputLocale(videodata);
IME_SetupAPI(videodata);
if (WIN_ShouldShowNativeUI()) {
videodata->ime_uiless = SDL_FALSE;
} else {
videodata->ime_uiless = UILess_SetupSinks(videodata);
}
IME_UpdateInputLocale(videodata);
IME_Disable(videodata, hwnd);
return 0;
}
static void IME_Enable(SDL_VideoData *videodata, HWND hwnd)
{
if (!videodata->ime_initialized || !videodata->ime_hwnd_current) {
return;
}
if (!videodata->ime_available) {
IME_Disable(videodata, hwnd);
return;
}
if (videodata->ime_hwnd_current == videodata->ime_hwnd_main) {
ImmAssociateContext(videodata->ime_hwnd_current, videodata->ime_himc);
}
videodata->ime_enabled = SDL_TRUE;
IME_UpdateInputLocale(videodata);
UILess_EnableUIUpdates(videodata);
}
static void IME_Disable(SDL_VideoData *videodata, HWND hwnd)
{
if (!videodata->ime_initialized || !videodata->ime_hwnd_current) {
return;
}
IME_ClearComposition(videodata);
if (videodata->ime_hwnd_current == videodata->ime_hwnd_main) {
ImmAssociateContext(videodata->ime_hwnd_current, (HIMC)0);
}
videodata->ime_enabled = SDL_FALSE;
UILess_DisableUIUpdates(videodata);
}
static void IME_Quit(SDL_VideoData *videodata)
{
if (!videodata->ime_initialized) {
return;
}
UILess_ReleaseSinks(videodata);
if (videodata->ime_hwnd_main) {
ImmAssociateContext(videodata->ime_hwnd_main, videodata->ime_himc);
}
videodata->ime_hwnd_main = 0;
videodata->ime_himc = 0;
if (videodata->ime_himm32) {
SDL_UnloadObject(videodata->ime_himm32);
videodata->ime_himm32 = 0;
}
if (videodata->ime_threadmgr) {
videodata->ime_threadmgr->lpVtbl->Release(videodata->ime_threadmgr);
videodata->ime_threadmgr = 0;
}
if (videodata->ime_com_initialized) {
WIN_CoUninitialize();
videodata->ime_com_initialized = SDL_FALSE;
}
IME_DestroyTextures(videodata);
videodata->ime_initialized = SDL_FALSE;
}
static void IME_GetReadingString(SDL_VideoData *videodata, HWND hwnd)
{
DWORD id = 0;
HIMC himc = 0;
WCHAR buffer[16];
WCHAR *s = buffer;
DWORD len = 0;
INT err = 0;
BOOL vertical = FALSE;
UINT maxuilen = 0;
if (videodata->ime_uiless) {
return;
}
videodata->ime_readingstring[0] = 0;
id = IME_GetId(videodata, 0);
if (!id) {
return;
}
himc = ImmGetContext(hwnd);
if (!himc) {
return;
}
if (videodata->GetReadingString) {
len = videodata->GetReadingString(himc, 0, 0, &err, &vertical, &maxuilen);
if (len) {
if (len > SDL_arraysize(buffer)) {
len = SDL_arraysize(buffer);
}
len = videodata->GetReadingString(himc, len, s, &err, &vertical, &maxuilen);
}
SDL_wcslcpy(videodata->ime_readingstring, s, len);
} else {
LPINPUTCONTEXT2 lpimc = videodata->ImmLockIMC(himc);
LPBYTE p = 0;
s = 0;
switch (id) {
case IMEID_CHT_VER42:
case IMEID_CHT_VER43:
case IMEID_CHT_VER44:
p = *(LPBYTE *)((LPBYTE)videodata->ImmLockIMCC(lpimc->hPrivate) + 24);
if (!p) {
break;
}
len = *(DWORD *)(p + 7 * 4 + 32 * 4);
s = (WCHAR *)(p + 56);
break;
case IMEID_CHT_VER51:
case IMEID_CHT_VER52:
case IMEID_CHS_VER53:
p = *(LPBYTE *)((LPBYTE)videodata->ImmLockIMCC(lpimc->hPrivate) + 4);
if (!p) {
break;
}
p = *(LPBYTE *)(p + 1 * 4 + 5 * 4);
if (!p) {
break;
}
len = *(DWORD *)(p + 1 * 4 + (16 * 2 + 2 * 4) + 5 * 4 + 16 * 2);
s = (WCHAR *)(p + 1 * 4 + (16 * 2 + 2 * 4) + 5 * 4);
break;
case IMEID_CHS_VER41:
{
int offset = (IME_GetId(videodata, 1) >= 0x00000002) ? 8 : 7;
p = *(LPBYTE *)((LPBYTE)videodata->ImmLockIMCC(lpimc->hPrivate) + offset * 4);
if (!p) {
break;
}
len = *(DWORD *)(p + 7 * 4 + 16 * 2 * 4);
s = (WCHAR *)(p + 6 * 4 + 16 * 2 * 1);
} break;
case IMEID_CHS_VER42:
p = *(LPBYTE *)((LPBYTE)videodata->ImmLockIMCC(lpimc->hPrivate) + 1 * 4 + 1 * 4 + 6 * 4);
if (!p) {
break;
}
len = *(DWORD *)(p + 1 * 4 + (16 * 2 + 2 * 4) + 5 * 4 + 16 * 2);
s = (WCHAR *)(p + 1 * 4 + (16 * 2 + 2 * 4) + 5 * 4);
break;
}
if (s) {
size_t size = SDL_min((size_t)(len + 1), SDL_arraysize(videodata->ime_readingstring));
SDL_wcslcpy(videodata->ime_readingstring, s, size);
}
videodata->ImmUnlockIMCC(lpimc->hPrivate);
videodata->ImmUnlockIMC(himc);
}
ImmReleaseContext(hwnd, himc);
IME_SendEditingEvent(videodata);
}
static void IME_InputLangChanged(SDL_VideoData *videodata)
{
UINT lang = PRIMLANG();
IME_UpdateInputLocale(videodata);
if (!videodata->ime_uiless) {
videodata->ime_candlistindexbase = (videodata->ime_hkl == CHT_HKL_DAYI) ? 0 : 1;
}
IME_SetupAPI(videodata);
if (lang != PRIMLANG()) {
IME_ClearComposition(videodata);
}
}
static DWORD IME_GetId(SDL_VideoData *videodata, UINT uIndex)
{
static HKL hklprev = 0;
static DWORD dwRet[2] = { 0 };
DWORD dwVerSize = 0;
DWORD dwVerHandle = 0;
LPVOID lpVerBuffer = 0;
LPVOID lpVerData = 0;
UINT cbVerData = 0;
char szTemp[256];
HKL hkl = 0;
DWORD dwLang = 0;
SDL_assert(uIndex < sizeof(dwRet) / sizeof(dwRet[0]));
hkl = videodata->ime_hkl;
if (hklprev == hkl) {
return dwRet[uIndex];
}
hklprev = hkl;
SDL_assert(uIndex == 0);
dwLang = ((DWORD_PTR)hkl & 0xffff);
if (videodata->ime_uiless && dwLang == LANG_CHT) {
dwRet[0] = IMEID_CHT_VER_VISTA;
dwRet[1] = 0;
return dwRet[0];
}
if (hkl != CHT_HKL_NEW_PHONETIC && hkl != CHT_HKL_NEW_CHANG_JIE && hkl != CHT_HKL_NEW_QUICK && hkl != CHT_HKL_HK_CANTONESE && hkl != CHS_HKL) {
dwRet[0] = dwRet[1] = 0;
return dwRet[0];
}
if (!ImmGetIMEFileNameA(hkl, szTemp, sizeof(szTemp) - 1)) {
dwRet[0] = dwRet[1] = 0;
return dwRet[0];
}
if (!videodata->GetReadingString) {
#define LCID_INVARIANT MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT)
if (CompareStringA(LCID_INVARIANT, NORM_IGNORECASE, szTemp, -1, CHT_IMEFILENAME1, -1) != 2 && CompareStringA(LCID_INVARIANT, NORM_IGNORECASE, szTemp, -1, CHT_IMEFILENAME2, -1) != 2 && CompareStringA(LCID_INVARIANT, NORM_IGNORECASE, szTemp, -1, CHT_IMEFILENAME3, -1) != 2 && CompareStringA(LCID_INVARIANT, NORM_IGNORECASE, szTemp, -1, CHS_IMEFILENAME1, -1) != 2 && CompareStringA(LCID_INVARIANT, NORM_IGNORECASE, szTemp, -1, CHS_IMEFILENAME2, -1) != 2) {
dwRet[0] = dwRet[1] = 0;
return dwRet[0];
}
#undef LCID_INVARIANT
dwVerSize = GetFileVersionInfoSizeA(szTemp, &dwVerHandle);
if (dwVerSize) {
lpVerBuffer = SDL_malloc(dwVerSize);
if (lpVerBuffer) {
if (GetFileVersionInfoA(szTemp, dwVerHandle, dwVerSize, lpVerBuffer)) {
if (VerQueryValueA(lpVerBuffer, "\\", &lpVerData, &cbVerData)) {
#define pVerFixedInfo ((VS_FIXEDFILEINFO FAR *)lpVerData)
DWORD dwVer = pVerFixedInfo->dwFileVersionMS;
dwVer = (dwVer & 0x00ff0000) << 8 | (dwVer & 0x000000ff) << 16;
if ((videodata->GetReadingString) ||
((dwLang == LANG_CHT) && (dwVer == MAKEIMEVERSION(4, 2) ||
dwVer == MAKEIMEVERSION(4, 3) ||
dwVer == MAKEIMEVERSION(4, 4) ||
dwVer == MAKEIMEVERSION(5, 0) ||
dwVer == MAKEIMEVERSION(5, 1) ||
dwVer == MAKEIMEVERSION(5, 2) ||
dwVer == MAKEIMEVERSION(6, 0))) ||
((dwLang == LANG_CHS) && (dwVer == MAKEIMEVERSION(4, 1) ||
dwVer == MAKEIMEVERSION(4, 2) ||
dwVer == MAKEIMEVERSION(5, 3)))) {
dwRet[0] = dwVer | dwLang;
dwRet[1] = pVerFixedInfo->dwFileVersionLS;
SDL_free(lpVerBuffer);
return dwRet[0];
}
#undef pVerFixedInfo
}
}
}
SDL_free(lpVerBuffer);
}
}
dwRet[0] = dwRet[1] = 0;
return dwRet[0];
}
static void IME_SetupAPI(SDL_VideoData *videodata)
{
char ime_file[MAX_PATH + 1];
void *hime = 0;
HKL hkl = 0;
videodata->GetReadingString = 0;
videodata->ShowReadingWindow = 0;
if (videodata->ime_uiless) {
return;
}
hkl = videodata->ime_hkl;
if (!ImmGetIMEFileNameA(hkl, ime_file, sizeof(ime_file) - 1)) {
return;
}
hime = SDL_LoadObject(ime_file);
if (!hime) {
return;
}
/* *INDENT-OFF* */ /* clang-format off */
videodata->GetReadingString = (UINT (WINAPI *)(HIMC, UINT, LPWSTR, PINT, BOOL*, PUINT))
SDL_LoadFunction(hime, "GetReadingString");
videodata->ShowReadingWindow = (BOOL (WINAPI *)(HIMC, BOOL))
SDL_LoadFunction(hime, "ShowReadingWindow");
/* *INDENT-ON* */ /* clang-format on */
if (videodata->ShowReadingWindow) {
HIMC himc = ImmGetContext(videodata->ime_hwnd_current);
if (himc) {
videodata->ShowReadingWindow(himc, FALSE);
ImmReleaseContext(videodata->ime_hwnd_current, himc);
}
}
}
static void IME_SetWindow(SDL_VideoData *videodata, HWND hwnd)
{
videodata->ime_hwnd_current = hwnd;
if (videodata->ime_threadmgr) {
struct ITfDocumentMgr *document_mgr = 0;
if (SUCCEEDED(videodata->ime_threadmgr->lpVtbl->AssociateFocus(videodata->ime_threadmgr, hwnd, NULL, &document_mgr))) {
if (document_mgr) {
document_mgr->lpVtbl->Release(document_mgr);
}
}
}
}
static void IME_UpdateInputLocale(SDL_VideoData *videodata)
{
HKL hklnext = GetKeyboardLayout(0);
if (hklnext == videodata->ime_hkl) {
return;
}
videodata->ime_hkl = hklnext;
videodata->ime_candvertical = (PRIMLANG() != LANG_KOREAN && LANG() != LANG_CHS);
}
static void IME_ClearComposition(SDL_VideoData *videodata)
{
HIMC himc = 0;
if (!videodata->ime_initialized) {
return;
}
himc = ImmGetContext(videodata->ime_hwnd_current);
if (!himc) {
return;
}
ImmNotifyIME(himc, NI_COMPOSITIONSTR, CPS_CANCEL, 0);
if (videodata->ime_uiless) {
ImmSetCompositionString(himc, SCS_SETSTR, TEXT(""), sizeof(TCHAR), TEXT(""), sizeof(TCHAR));
}
ImmNotifyIME(himc, NI_CLOSECANDIDATE, 0, 0);
ImmReleaseContext(videodata->ime_hwnd_current, himc);
SDL_SendEditingText("", 0, 0);
}
static SDL_bool IME_IsTextInputShown(SDL_VideoData *videodata)
{
if (!videodata->ime_initialized || !videodata->ime_available || !videodata->ime_enabled) {
return SDL_FALSE;
}
return videodata->ime_uicontext != 0;
}
static void IME_GetCompositionString(SDL_VideoData *videodata, HIMC himc, DWORD string)
{
LONG length;
DWORD dwLang = ((DWORD_PTR)videodata->ime_hkl & 0xffff);
length = ImmGetCompositionStringW(himc, string, NULL, 0);
if (length > 0 && videodata->ime_composition_length < length) {
if (videodata->ime_composition) {
SDL_free(videodata->ime_composition);
}
videodata->ime_composition = (WCHAR *)SDL_malloc(length + sizeof(WCHAR));
videodata->ime_composition_length = length;
}
length = ImmGetCompositionStringW(
himc,
string,
videodata->ime_composition,
videodata->ime_composition_length);
if (length < 0) {
length = 0;
}
length /= sizeof(WCHAR);
videodata->ime_cursor = LOWORD(ImmGetCompositionStringW(himc, GCS_CURSORPOS, 0, 0));
if ((dwLang == LANG_CHT || dwLang == LANG_CHS) &&
videodata->ime_cursor > 0 &&
videodata->ime_cursor < (int)(videodata->ime_composition_length / sizeof(WCHAR)) &&
(videodata->ime_composition[0] == 0x3000 || videodata->ime_composition[0] == 0x0020)) {
// Traditional Chinese IMEs add a placeholder U+3000
// Simplified Chinese IMEs seem to add a placeholder U+0020 sometimes
int i;
for (i = videodata->ime_cursor + 1; i < length; ++i) {
videodata->ime_composition[i - 1] = videodata->ime_composition[i];
}
--length;
}
videodata->ime_composition[length] = 0;
// Get the correct caret position if we've selected a candidate from the candidate window
if (videodata->ime_cursor == 0 && length > 0) {
Sint32 start = 0;
Sint32 end = 0;
length = ImmGetCompositionStringW(himc, GCS_COMPATTR, NULL, 0);
if (length > 0) {
Uint8 *attributes = (Uint8 *)SDL_malloc(length + sizeof(WCHAR));
ImmGetCompositionString(himc, GCS_COMPATTR, attributes, length);
for (start = 0; start < length; ++start) {
if (attributes[start] == ATTR_TARGET_CONVERTED || attributes[start] == ATTR_TARGET_NOTCONVERTED) {
break;
}
}
for (end = start; end < length; ++end) {
if (attributes[end] != ATTR_TARGET_CONVERTED && attributes[end] != ATTR_TARGET_NOTCONVERTED) {
break;
}
}
if (start == length) {
start = 0;
end = length;
}
SDL_free(attributes);
}
videodata->ime_cursor = end;
}
}
static void IME_SendInputEvent(SDL_VideoData *videodata)
{
char *s = 0;
s = WIN_StringToUTF8W(videodata->ime_composition);
SDL_SendKeyboardText(s);
SDL_free(s);
videodata->ime_composition[0] = 0;
videodata->ime_readingstring[0] = 0;
videodata->ime_cursor = 0;
}
static void IME_SendEditingEvent(SDL_VideoData *videodata)
{
char *s = NULL;
WCHAR *buffer = NULL;
size_t size = videodata->ime_composition_length;
if (videodata->ime_readingstring[0]) {
size_t len = SDL_min(SDL_wcslen(videodata->ime_composition), (size_t)videodata->ime_cursor);
size += sizeof(videodata->ime_readingstring);
buffer = (WCHAR *)SDL_malloc(size + sizeof(WCHAR));
buffer[0] = 0;
SDL_wcslcpy(buffer, videodata->ime_composition, len + 1);
SDL_wcslcat(buffer, videodata->ime_readingstring, size);
SDL_wcslcat(buffer, &videodata->ime_composition[len], size);
} else {
buffer = (WCHAR *)SDL_malloc(size + sizeof(WCHAR));
buffer[0] = 0;
SDL_wcslcpy(buffer, videodata->ime_composition, size);
}
s = WIN_StringToUTF8W(buffer);
SDL_SendEditingText(s, videodata->ime_cursor + (int)SDL_wcslen(videodata->ime_readingstring), 0);
SDL_free(s);
SDL_free(buffer);
}
static void IME_AddCandidate(SDL_VideoData *videodata, UINT i, LPCWSTR candidate)
{
LPWSTR dst = &videodata->ime_candidates[i * MAX_CANDLENGTH];
LPWSTR end = &dst[MAX_CANDLENGTH - 1];
SDL_COMPILE_TIME_ASSERT(IME_CANDIDATE_INDEXING_REQUIRES, MAX_CANDLIST == 10);
*dst++ = (WCHAR)(TEXT('0') + ((i + videodata->ime_candlistindexbase) % 10));
if (videodata->ime_candvertical) {
*dst++ = TEXT(' ');
}
while (*candidate && dst < end) {
*dst++ = *candidate++;
}
*dst = (WCHAR)'\0';
}
static void IME_GetCandidateList(HWND hwnd, SDL_VideoData *videodata)
{
HIMC himc;
DWORD size;
LPCANDIDATELIST cand_list;
if (IME_ShowCandidateList(videodata) < 0) {
return;
}
himc = ImmGetContext(hwnd);
if (!himc) {
return;
}
size = ImmGetCandidateListW(himc, 0, 0, 0);
if (size != 0) {
cand_list = (LPCANDIDATELIST)SDL_malloc(size);
if (cand_list != NULL) {
size = ImmGetCandidateListW(himc, 0, cand_list, size);
if (size != 0) {
UINT i, j;
UINT page_start = 0;
videodata->ime_candsel = cand_list->dwSelection;
videodata->ime_candcount = cand_list->dwCount;
if (LANG() == LANG_CHS && IME_GetId(videodata, 0)) {
const UINT maxcandchar = 18;
size_t cchars = 0;
for (i = 0; i < videodata->ime_candcount; ++i) {
size_t len = SDL_wcslen((LPWSTR)((DWORD_PTR)cand_list + cand_list->dwOffset[i])) + 1;
if (len + cchars > maxcandchar) {
if (i > cand_list->dwSelection) {
break;
}
page_start = i;
cchars = len;
} else {
cchars += len;
}
}
videodata->ime_candpgsize = i - page_start;
} else {
videodata->ime_candpgsize = SDL_min(cand_list->dwPageSize == 0 ? MAX_CANDLIST : cand_list->dwPageSize, MAX_CANDLIST);
page_start = (cand_list->dwSelection / videodata->ime_candpgsize) * videodata->ime_candpgsize;
}
for (i = page_start, j = 0; (DWORD)i < cand_list->dwCount && j < videodata->ime_candpgsize; i++, j++) {
LPCWSTR candidate = (LPCWSTR)((DWORD_PTR)cand_list + cand_list->dwOffset[i]);
IME_AddCandidate(videodata, j, candidate);
}
// TODO: why was this necessary? check ime_candvertical instead? PRIMLANG() never equals LANG_CHT !
// if (PRIMLANG() == LANG_KOREAN || (PRIMLANG() == LANG_CHT && !IME_GetId(videodata, 0)))
// videodata->ime_candsel = -1;
}
SDL_free(cand_list);
}
}
ImmReleaseContext(hwnd, himc);
}
static int IME_ShowCandidateList(SDL_VideoData *videodata)
{
void *candidates;
videodata->ime_candcount = 0;
candidates = SDL_realloc(videodata->ime_candidates, MAX_CANDSIZE);
if (candidates) {
videodata->ime_candidates = (WCHAR *)candidates;