*init

1 files changed, 584 insertions, 0 deletions

diff --git a/ThirdParty/SDL2/src/core/linux/SDL_ibus.c b/ThirdParty/SDL2/src/core/linux/SDL_ibus.c
new file mode 100644
index 0000000..a9c3197
--- /dev/null
+++ b/ThirdParty/SDL2/src/core/linux/SDL_ibus.c
@@ -0,0 +1,584 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 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, 0, 0, 0 };
+static DBusConnection *ibus_conn = NULL;
+static char *ibus_addr_file = NULL;
+static 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 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_TEXTINPUTEVENT_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 {
+                const size_t sz = SDL_utf8strlcpy(buf, text+i, sizeof(buf));
+                const size_t chars = SDL_utf8strlen(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 SDLCALL
+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)) {
+        Uint32 caps = IBUS_CAP_FOCUS;
+        if (!(internal_editing && *internal_editing == '1')) {
+            caps |= IBUS_CAP_PREEDIT_TEXT;
+        }
+
+        SDL_DBus_CallVoidMethodOnConnection(ibus_conn, IBUS_SERVICE, input_ctx_path, IBUS_INPUT_INTERFACE, "SetCapabilities",
+                                DBUS_TYPE_UINT32, &caps, DBUS_TYPE_INVALID);
+    }
+}
+
+
+static SDL_bool
+IBus_SetupConnection(SDL_DBusContext *dbus, const char* addr)
+{
+    const char *client_name = "SDL2_Application";
+    const char *path = NULL;
+    SDL_bool result = SDL_FALSE;
+    DBusObjectPathVTable ibus_vtable;
+
+    SDL_zero(ibus_vtable);
+    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);
+
+    if (SDL_DBus_CallMethodOnConnection(ibus_conn, IBUS_SERVICE, IBUS_PATH, IBUS_INTERFACE, "CreateInputContext",
+            DBUS_TYPE_STRING, &client_name, DBUS_TYPE_INVALID,
+            DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
+        SDL_free(input_ctx_path);
+        input_ctx_path = SDL_strdup(path);
+        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);
+        result = SDL_TRUE;
+    }
+
+    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)) {
+        SDL_DBus_CallVoidMethodOnConnection(ibus_conn, IBUS_SERVICE, input_ctx_path, IBUS_INPUT_INTERFACE, method, DBUS_TYPE_INVALID);
+    }
+}
+
+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)
+{ 
+    Uint32 result = 0;
+    SDL_DBusContext *dbus = SDL_DBus_GetContext();
+    
+    if (IBus_CheckConnection(dbus)) {
+        Uint32 mods = IBus_ModState();
+        if (!SDL_DBus_CallMethodOnConnection(ibus_conn, IBUS_SERVICE, input_ctx_path, IBUS_INPUT_INTERFACE, "ProcessKeyEvent",
+                DBUS_TYPE_UINT32, &keysym, DBUS_TYPE_UINT32, &keycode, DBUS_TYPE_UINT32, &mods, DBUS_TYPE_INVALID,
+                DBUS_TYPE_BOOLEAN, &result, DBUS_TYPE_INVALID)) {
+            result = 0;
+        }
+    }
+    
+    SDL_IBus_UpdateTextRect(NULL);
+
+    return result ? SDL_TRUE : SDL_FALSE;
+}
+
+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)) {
+        SDL_DBus_CallVoidMethodOnConnection(ibus_conn, IBUS_SERVICE, input_ctx_path, IBUS_INPUT_INTERFACE, "SetCursorLocation",
+                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);
+    }
+}
+
+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
+
+/* vi: set ts=4 sw=4 expandtab: */