SDL_ibus.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2016 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"
#ifdef HAVE_IBUS_IBUS_H
#include "SDL.h"
#include "SDL_syswm.h"
#include "SDL_ibus.h"
#include "SDL_dbus.h"
#include "../../video/SDL_sysvideo.h"
#include "../../events/SDL_keyboard_c.h"
#if SDL_VIDEO_DRIVER_X11
#include "../../video/x11/SDL_x11video.h"
#endif
#include <sys/inotify.h>
#include <unistd.h>
#include <fcntl.h>
static const char IBUS_SERVICE[] = "org.freedesktop.IBus";
static const char IBUS_PATH[] = "/org/freedesktop/IBus";
static const char IBUS_INTERFACE[] = "org.freedesktop.IBus";
static const char IBUS_INPUT_INTERFACE[] = "org.freedesktop.IBus.InputContext";
static char *input_ctx_path = NULL;
static SDL_Rect ibus_cursor_rect = {0};
static DBusConnection *ibus_conn = NULL;
static char *ibus_addr_file = NULL;
int inotify_fd = -1, inotify_wd = -1;
static Uint32
IBus_ModState(void)
{
Uint32 ibus_mods = 0;
SDL_Keymod sdl_mods = SDL_GetModState();
/* Not sure about MOD3, MOD4 and HYPER mappings */
if (sdl_mods & KMOD_LSHIFT) ibus_mods |= IBUS_SHIFT_MASK;
if (sdl_mods & KMOD_CAPS) ibus_mods |= IBUS_LOCK_MASK;
if (sdl_mods & KMOD_LCTRL) ibus_mods |= IBUS_CONTROL_MASK;
if (sdl_mods & KMOD_LALT) ibus_mods |= IBUS_MOD1_MASK;
if (sdl_mods & KMOD_NUM) ibus_mods |= IBUS_MOD2_MASK;
if (sdl_mods & KMOD_MODE) ibus_mods |= IBUS_MOD5_MASK;
if (sdl_mods & KMOD_LGUI) ibus_mods |= IBUS_SUPER_MASK;
if (sdl_mods & KMOD_RGUI) ibus_mods |= IBUS_META_MASK;
return ibus_mods;
}
static const char *
IBus_GetVariantText(DBusConnection *conn, DBusMessageIter *iter, SDL_DBusContext *dbus)
{
/* The text we need is nested weirdly, use dbus-monitor to see the structure better */
const char *text = NULL;
const char *struct_id = NULL;
DBusMessageIter sub1, sub2;
if (dbus->message_iter_get_arg_type(iter) != DBUS_TYPE_VARIANT) {
return NULL;
}
dbus->message_iter_recurse(iter, &sub1);
if (dbus->message_iter_get_arg_type(&sub1) != DBUS_TYPE_STRUCT) {
return NULL;
}
dbus->message_iter_recurse(&sub1, &sub2);
if (dbus->message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
return NULL;
}
dbus->message_iter_get_basic(&sub2, &struct_id);
if (!struct_id || SDL_strncmp(struct_id, "IBusText", sizeof("IBusText")) != 0) {
return NULL;
}
dbus->message_iter_next(&sub2);
dbus->message_iter_next(&sub2);
if (dbus->message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
return NULL;
}
dbus->message_iter_get_basic(&sub2, &text);
return text;
}
static size_t
IBus_utf8_strlen(const char *str)
{
size_t utf8_len = 0;
const char *p;
for (p = str; *p; ++p) {
if (!((*p & 0x80) && !(*p & 0x40))) {
++utf8_len;
}
}
return utf8_len;
}
static DBusHandlerResult
IBus_MessageHandler(DBusConnection *conn, DBusMessage *msg, void *user_data)
{
SDL_DBusContext *dbus = (SDL_DBusContext *)user_data;
if (dbus->message_is_signal(msg, IBUS_INPUT_INTERFACE, "CommitText")) {
DBusMessageIter iter;
const char *text;
dbus->message_iter_init(msg, &iter);
text = IBus_GetVariantText(conn, &iter, dbus);
if (text && *text) {
char buf[SDL_TEXTEDITINGEVENT_TEXT_SIZE];
size_t text_bytes = SDL_strlen(text), i = 0;
while (i < text_bytes) {
size_t sz = SDL_utf8strlcpy(buf, text+i, sizeof(buf));
SDL_SendKeyboardText(buf);
i += sz;
}
}
return DBUS_HANDLER_RESULT_HANDLED;
}
if (dbus->message_is_signal(msg, IBUS_INPUT_INTERFACE, "UpdatePreeditText")) {
DBusMessageIter iter;
const char *text;
dbus->message_iter_init(msg, &iter);
text = IBus_GetVariantText(conn, &iter, dbus);
if (text) {
char buf[SDL_TEXTEDITINGEVENT_TEXT_SIZE];
size_t text_bytes = SDL_strlen(text), i = 0;
size_t cursor = 0;
do {
size_t sz = SDL_utf8strlcpy(buf, text+i, sizeof(buf));
size_t chars = IBus_utf8_strlen(buf);
SDL_SendEditingText(buf, cursor, chars);
i += sz;
cursor += chars;
} while (i < text_bytes);
}
SDL_IBus_UpdateTextRect(NULL);
return DBUS_HANDLER_RESULT_HANDLED;
}
if (dbus->message_is_signal(msg, IBUS_INPUT_INTERFACE, "HidePreeditText")) {
SDL_SendEditingText("", 0, 0);
return DBUS_HANDLER_RESULT_HANDLED;
}
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
static char *
IBus_ReadAddressFromFile(const char *file_path)
{
char addr_buf[1024];
SDL_bool success = SDL_FALSE;
FILE *addr_file;
addr_file = fopen(file_path, "r");
if (!addr_file) {
return NULL;
}
while (fgets(addr_buf, sizeof(addr_buf), addr_file)) {
if (SDL_strncmp(addr_buf, "IBUS_ADDRESS=", sizeof("IBUS_ADDRESS=")-1) == 0) {
size_t sz = SDL_strlen(addr_buf);
if (addr_buf[sz-1] == '\n') addr_buf[sz-1] = 0;
if (addr_buf[sz-2] == '\r') addr_buf[sz-2] = 0;
success = SDL_TRUE;
break;
}
}
fclose(addr_file);
if (success) {
return SDL_strdup(addr_buf + (sizeof("IBUS_ADDRESS=") - 1));
} else {
return NULL;
}
}
static char *
IBus_GetDBusAddressFilename(void)
{
SDL_DBusContext *dbus;
const char *disp_env;
char config_dir[PATH_MAX];
char *display = NULL;
const char *addr;
const char *conf_env;
char *key;
char file_path[PATH_MAX];
const char *host;
char *disp_num, *screen_num;
if (ibus_addr_file) {
return SDL_strdup(ibus_addr_file);
}
dbus = SDL_DBus_GetContext();
if (!dbus) {
return NULL;
}
/* Use this environment variable if it exists. */
addr = SDL_getenv("IBUS_ADDRESS");
if (addr && *addr) {
return SDL_strdup(addr);
}
/* Otherwise, we have to get the hostname, display, machine id, config dir
and look up the address from a filepath using all those bits, eek. */
disp_env = SDL_getenv("DISPLAY");
if (!disp_env || !*disp_env) {
display = SDL_strdup(":0.0");
} else {
display = SDL_strdup(disp_env);
}
host = display;
disp_num = SDL_strrchr(display, ':');
screen_num = SDL_strrchr(display, '.');
if (!disp_num) {
SDL_free(display);
return NULL;
}
*disp_num = 0;
disp_num++;
if (screen_num) {
*screen_num = 0;
}
if (!*host) {
host = "unix";
}
SDL_memset(config_dir, 0, sizeof(config_dir));
conf_env = SDL_getenv("XDG_CONFIG_HOME");
if (conf_env && *conf_env) {
SDL_strlcpy(config_dir, conf_env, sizeof(config_dir));
} else {
const char *home_env = SDL_getenv("HOME");
if (!home_env || !*home_env) {
SDL_free(display);
return NULL;
}
SDL_snprintf(config_dir, sizeof(config_dir), "%s/.config", home_env);
}
key = dbus->get_local_machine_id();
SDL_memset(file_path, 0, sizeof(file_path));
SDL_snprintf(file_path, sizeof(file_path), "%s/ibus/bus/%s-%s-%s",
config_dir, key, host, disp_num);
dbus->free(key);
SDL_free(display);
return SDL_strdup(file_path);
}
static SDL_bool IBus_CheckConnection(SDL_DBusContext *dbus);
static void
IBus_SetCapabilities(void *data, const char *name, const char *old_val,
const char *internal_editing)
{
SDL_DBusContext *dbus = SDL_DBus_GetContext();
if (IBus_CheckConnection(dbus)) {
DBusMessage *msg = dbus->message_new_method_call(IBUS_SERVICE,
input_ctx_path,
IBUS_INPUT_INTERFACE,
"SetCapabilities");
if (msg) {
Uint32 caps = IBUS_CAP_FOCUS;
if (!(internal_editing && *internal_editing == '1')) {
caps |= IBUS_CAP_PREEDIT_TEXT;
}
dbus->message_append_args(msg,
DBUS_TYPE_UINT32, &caps,
DBUS_TYPE_INVALID);
}
if (msg) {
if (dbus->connection_send(ibus_conn, msg, NULL)) {
dbus->connection_flush(ibus_conn);
}
dbus->message_unref(msg);
}
}
}
static SDL_bool
IBus_SetupConnection(SDL_DBusContext *dbus, const char* addr)
{
const char *path = NULL;
SDL_bool result = SDL_FALSE;
DBusMessage *msg;
DBusObjectPathVTable ibus_vtable = {0};
ibus_vtable.message_function = &IBus_MessageHandler;
ibus_conn = dbus->connection_open_private(addr, NULL);
if (!ibus_conn) {
return SDL_FALSE;
}
dbus->connection_flush(ibus_conn);
if (!dbus->bus_register(ibus_conn, NULL)) {
ibus_conn = NULL;
return SDL_FALSE;
}
dbus->connection_flush(ibus_conn);
msg = dbus->message_new_method_call(IBUS_SERVICE, IBUS_PATH, IBUS_INTERFACE, "CreateInputContext");
if (msg) {
const char *client_name = "SDL2_Application";
dbus->message_append_args(msg,
DBUS_TYPE_STRING, &client_name,
DBUS_TYPE_INVALID);
}
if (msg) {
DBusMessage *reply;
reply = dbus->connection_send_with_reply_and_block(ibus_conn, msg, 1000, NULL);
if (reply) {
if (dbus->message_get_args(reply, NULL,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
if (input_ctx_path) {
SDL_free(input_ctx_path);
}
input_ctx_path = SDL_strdup(path);
result = SDL_TRUE;
}
dbus->message_unref(reply);
}
dbus->message_unref(msg);
}
if (result) {
SDL_AddHintCallback(SDL_HINT_IME_INTERNAL_EDITING, &IBus_SetCapabilities, NULL);
dbus->bus_add_match(ibus_conn, "type='signal',interface='org.freedesktop.IBus.InputContext'", NULL);
dbus->connection_try_register_object_path(ibus_conn, input_ctx_path, &ibus_vtable, dbus, NULL);
dbus->connection_flush(ibus_conn);
}
SDL_IBus_SetFocus(SDL_GetKeyboardFocus() != NULL);
SDL_IBus_UpdateTextRect(NULL);
return result;
}
static SDL_bool
IBus_CheckConnection(SDL_DBusContext *dbus)
{
if (!dbus) return SDL_FALSE;
if (ibus_conn && dbus->connection_get_is_connected(ibus_conn)) {
return SDL_TRUE;
}
if (inotify_fd > 0 && inotify_wd > 0) {
char buf[1024];
ssize_t readsize = read(inotify_fd, buf, sizeof(buf));
if (readsize > 0) {
char *p;
SDL_bool file_updated = SDL_FALSE;
for (p = buf; p < buf + readsize; /**/) {
struct inotify_event *event = (struct inotify_event*) p;
if (event->len > 0) {
char *addr_file_no_path = SDL_strrchr(ibus_addr_file, '/');
if (!addr_file_no_path) return SDL_FALSE;
if (SDL_strcmp(addr_file_no_path + 1, event->name) == 0) {
file_updated = SDL_TRUE;
break;
}
}
p += sizeof(struct inotify_event) + event->len;
}
if (file_updated) {
char *addr = IBus_ReadAddressFromFile(ibus_addr_file);
if (addr) {
SDL_bool result = IBus_SetupConnection(dbus, addr);
SDL_free(addr);
return result;
}
}
}
}
return SDL_FALSE;
}
SDL_bool
SDL_IBus_Init(void)
{
SDL_bool result = SDL_FALSE;
SDL_DBusContext *dbus = SDL_DBus_GetContext();
if (dbus) {
char *addr_file = IBus_GetDBusAddressFilename();
char *addr;
char *addr_file_dir;
if (!addr_file) {
return SDL_FALSE;
}
/* !!! FIXME: if ibus_addr_file != NULL, this will overwrite it and leak (twice!) */
ibus_addr_file = SDL_strdup(addr_file);
addr = IBus_ReadAddressFromFile(addr_file);
if (!addr) {
SDL_free(addr_file);
return SDL_FALSE;
}
if (inotify_fd < 0) {
inotify_fd = inotify_init();
fcntl(inotify_fd, F_SETFL, O_NONBLOCK);
}
addr_file_dir = SDL_strrchr(addr_file, '/');
if (addr_file_dir) {
*addr_file_dir = 0;
}
inotify_wd = inotify_add_watch(inotify_fd, addr_file, IN_CREATE | IN_MODIFY);
SDL_free(addr_file);
if (addr) {
result = IBus_SetupConnection(dbus, addr);
SDL_free(addr);
}
}
return result;
}
void
SDL_IBus_Quit(void)
{
SDL_DBusContext *dbus;
if (input_ctx_path) {
SDL_free(input_ctx_path);
input_ctx_path = NULL;
}
if (ibus_addr_file) {
SDL_free(ibus_addr_file);
ibus_addr_file = NULL;
}
dbus = SDL_DBus_GetContext();
if (dbus && ibus_conn) {
dbus->connection_close(ibus_conn);
dbus->connection_unref(ibus_conn);
}
if (inotify_fd > 0 && inotify_wd > 0) {
inotify_rm_watch(inotify_fd, inotify_wd);
inotify_wd = -1;
}
SDL_DelHintCallback(SDL_HINT_IME_INTERNAL_EDITING, &IBus_SetCapabilities, NULL);
SDL_memset(&ibus_cursor_rect, 0, sizeof(ibus_cursor_rect));
}
static void
IBus_SimpleMessage(const char *method)
{
SDL_DBusContext *dbus = SDL_DBus_GetContext();
if (IBus_CheckConnection(dbus)) {
DBusMessage *msg = dbus->message_new_method_call(IBUS_SERVICE,
input_ctx_path,
IBUS_INPUT_INTERFACE,
method);
if (msg) {
if (dbus->connection_send(ibus_conn, msg, NULL)) {
dbus->connection_flush(ibus_conn);
}
dbus->message_unref(msg);
}
}
}
void
SDL_IBus_SetFocus(SDL_bool focused)
{
const char *method = focused ? "FocusIn" : "FocusOut";
IBus_SimpleMessage(method);
}
void
SDL_IBus_Reset(void)
{
IBus_SimpleMessage("Reset");
}
SDL_bool
SDL_IBus_ProcessKeyEvent(Uint32 keysym, Uint32 keycode)
{
SDL_bool result = SDL_FALSE;
SDL_DBusContext *dbus = SDL_DBus_GetContext();
if (IBus_CheckConnection(dbus)) {
DBusMessage *msg = dbus->message_new_method_call(IBUS_SERVICE,
input_ctx_path,
IBUS_INPUT_INTERFACE,
"ProcessKeyEvent");
if (msg) {
Uint32 mods = IBus_ModState();
dbus->message_append_args(msg,
DBUS_TYPE_UINT32, &keysym,
DBUS_TYPE_UINT32, &keycode,
DBUS_TYPE_UINT32, &mods,
DBUS_TYPE_INVALID);
}
if (msg) {
DBusMessage *reply;
reply = dbus->connection_send_with_reply_and_block(ibus_conn, msg, 300, NULL);
if (reply) {
if (!dbus->message_get_args(reply, NULL,
DBUS_TYPE_BOOLEAN, &result,
DBUS_TYPE_INVALID)) {
result = SDL_FALSE;
}
dbus->message_unref(reply);
}
dbus->message_unref(msg);
}
}
SDL_IBus_UpdateTextRect(NULL);
return result;
}
void
SDL_IBus_UpdateTextRect(SDL_Rect *rect)
{
SDL_Window *focused_win;
SDL_SysWMinfo info;
int x = 0, y = 0;
SDL_DBusContext *dbus;
if (rect) {
SDL_memcpy(&ibus_cursor_rect, rect, sizeof(ibus_cursor_rect));
}
focused_win = SDL_GetKeyboardFocus();
if (!focused_win) {
return;
}
SDL_VERSION(&info.version);
if (!SDL_GetWindowWMInfo(focused_win, &info)) {
return;
}
SDL_GetWindowPosition(focused_win, &x, &y);
#if SDL_VIDEO_DRIVER_X11
if (info.subsystem == SDL_SYSWM_X11) {
SDL_DisplayData *displaydata = (SDL_DisplayData *) SDL_GetDisplayForWindow(focused_win)->driverdata;
Display *x_disp = info.info.x11.display;
Window x_win = info.info.x11.window;
int x_screen = displaydata->screen;
Window unused;
X11_XTranslateCoordinates(x_disp, x_win, RootWindow(x_disp, x_screen), 0, 0, &x, &y, &unused);
}
#endif
x += ibus_cursor_rect.x;
y += ibus_cursor_rect.y;
dbus = SDL_DBus_GetContext();
if (IBus_CheckConnection(dbus)) {
DBusMessage *msg = dbus->message_new_method_call(IBUS_SERVICE,
input_ctx_path,
IBUS_INPUT_INTERFACE,
"SetCursorLocation");
if (msg) {
dbus->message_append_args(msg,
DBUS_TYPE_INT32, &x,
DBUS_TYPE_INT32, &y,
DBUS_TYPE_INT32, &ibus_cursor_rect.w,
DBUS_TYPE_INT32, &ibus_cursor_rect.h,
DBUS_TYPE_INVALID);
}
if (msg) {
if (dbus->connection_send(ibus_conn, msg, NULL)) {
dbus->connection_flush(ibus_conn);
}
dbus->message_unref(msg);
}
}
}
void
SDL_IBus_PumpEvents(void)
{
SDL_DBusContext *dbus = SDL_DBus_GetContext();
if (IBus_CheckConnection(dbus)) {
dbus->connection_read_write(ibus_conn, 0);
while (dbus->connection_dispatch(ibus_conn) == DBUS_DISPATCH_DATA_REMAINS) {
/* Do nothing, actual work happens in IBus_MessageHandler */
}
}
}
#endif
SDL_DisplayData::screen
int screen
Definition: SDL_x11modes.h:28
SDL_strlcpy
#define SDL_strlcpy
Definition: SDL_dynapi_overrides.h:400
SDL_ibus.h
KMOD_LCTRL
Definition: SDL_keycode.h:322
result
GLuint64EXT * result
Definition: SDL_opengl_glext.h:9432
Uint32
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:155
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x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1567
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SDL_Rect rect
Definition: testrelative.c:27
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Definition: SDL_keycode.h:320
p
GLfloat GLfloat p
Definition: SDL_opengl_glext.h:11090
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#define SDL_utf8strlcpy
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GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1967
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SDL_version version
Definition: SDL_syswm.h:183
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SDL_SYSWM_TYPE subsystem
Definition: SDL_syswm.h:184
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GLuint const GLchar * name
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Definition: SDL_syswm.h:116
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#define SDL_GetKeyboardFocus
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#define SDL_strncmp
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GLenum GLsizei len
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#define SDL_VERSION(x)
Macro to determine SDL version program was compiled against.
Definition: SDL_version.h:79
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SDL_bool
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Definition: SDL_keycode.h:327
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#define SDL_memcpy
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Definition: SDL_syswm.h:181
y
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1567
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int SDL_SendKeyboardText(const char *text)
Definition: SDL_keyboard.c:774
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struct _cl_event * event
Definition: SDL_opengl_glext.h:2649
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void SDL_free(void *mem)
KMOD_CAPS
Definition: SDL_keycode.h:329
KMOD_MODE
Definition: SDL_keycode.h:330
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GLenum const void * addr
Definition: SDL_opengl_glext.h:7945
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Definition: SDL_keycode.h:328
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#define SDL_GetWindowPosition
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int x
Definition: SDL_rect.h:66
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SDL_Cursor * cursor
Definition: testwm2.c:40
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Definition: SDL_stdinc.h:129
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GLenum GLuint GLenum GLsizei const GLchar * buf
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int w
Definition: SDL_rect.h:67
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struct SDL_SysWMinfo::@18::@19 x11
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#define SDL_HINT_IME_INTERNAL_EDITING
A variable to control whether certain IMEs should handle text editing internally instead of sending S...
Definition: SDL_hints.h:584
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Enumeration of valid key mods (possibly OR&#39;d together).
Definition: SDL_keycode.h:317
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#define SDL_getenv
Definition: SDL_dynapi_overrides.h:384
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:42
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#define SDL_GetWindowWMInfo
Definition: SDL_dynapi_overrides.h:477
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#define NULL
Definition: begin_code.h:143
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static char text[MAX_TEXT_LENGTH]
Definition: testime.c:34
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Definition: SDL_keycode.h:326
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#define SDL_strlen
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int h
Definition: SDL_rect.h:67
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#define SDL_strdup
Definition: SDL_dynapi_overrides.h:403
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The type used to identify a window.
Definition: SDL_sysvideo.h:71
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#define SDL_AddHintCallback
Definition: SDL_dynapi_overrides.h:198
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Definition: SDL_stdinc.h:128
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#define SDL_DelHintCallback
Definition: SDL_dynapi_overrides.h:199
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#define SDL_snprintf
Definition: SDL_dynapi_overrides.h:46
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union SDL_SysWMinfo::@18 info
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GLsizei const GLchar *const * path
Definition: SDL_opengl_glext.h:3730
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#define SDL_strcmp
Definition: SDL_dynapi_overrides.h:423
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#define SDL_strrchr
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#define SDL_GetModState
Definition: SDL_dynapi_overrides.h:224
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int y
Definition: SDL_rect.h:66
SDL_SendEditingText
int SDL_SendEditingText(const char *text, int start, int length)
Definition: SDL_keyboard.c:797
SDL_memset
#define SDL_memset
Definition: SDL_dynapi_overrides.h:392
SDL_Rect
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64
SDL_VideoDisplay::driverdata
void * driverdata
Definition: SDL_sysvideo.h:133
SDL_TEXTEDITINGEVENT_TEXT_SIZE
#define SDL_TEXTEDITINGEVENT_TEXT_SIZE
Definition: SDL_events.h:199