Atlas - SDL_ime.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21
22#include "SDL_ime.h"
23#include "SDL_ibus.h"
24#include "SDL_fcitx.h"
25
26typedef SDL_bool (*_SDL_IME_Init)();
27typedef void (*_SDL_IME_Quit)();
28typedef void (*_SDL_IME_SetFocus)(SDL_bool);
29typedef void (*_SDL_IME_Reset)();
30typedef SDL_bool (*_SDL_IME_ProcessKeyEvent)(Uint32, Uint32);
31typedef void (*_SDL_IME_UpdateTextRect)(SDL_Rect *);
32typedef void (*_SDL_IME_PumpEvents)();
33
34static _SDL_IME_Init SDL_IME_Init_Real = NULL;
35static _SDL_IME_Quit SDL_IME_Quit_Real = NULL;
36static _SDL_IME_SetFocus SDL_IME_SetFocus_Real = NULL;
37static _SDL_IME_Reset SDL_IME_Reset_Real = NULL;
38static _SDL_IME_ProcessKeyEvent SDL_IME_ProcessKeyEvent_Real = NULL;
39static _SDL_IME_UpdateTextRect SDL_IME_UpdateTextRect_Real = NULL;
40static _SDL_IME_PumpEvents SDL_IME_PumpEvents_Real = NULL;
41
42static void
43InitIME()
44{
45    static SDL_bool inited = SDL_FALSE;
46#ifdef HAVE_FCITX_FRONTEND_H
47    const char *im_module = SDL_getenv("SDL_IM_MODULE");
48    const char *xmodifiers = SDL_getenv("XMODIFIERS");
49#endif
50
51    if (inited == SDL_TRUE)
52        return;
53
54    inited = SDL_TRUE;
55
56    /* See if fcitx IME support is being requested */
57#ifdef HAVE_FCITX_FRONTEND_H
58    if (!SDL_IME_Init_Real &&
59        ((im_module && SDL_strcmp(im_module, "fcitx") == 0) ||
60         (!im_module && xmodifiers && SDL_strstr(xmodifiers, "@im=fcitx") != NULL))) {
61        SDL_IME_Init_Real = SDL_Fcitx_Init;
62        SDL_IME_Quit_Real = SDL_Fcitx_Quit;
63        SDL_IME_SetFocus_Real = SDL_Fcitx_SetFocus;
64        SDL_IME_Reset_Real = SDL_Fcitx_Reset;
65        SDL_IME_ProcessKeyEvent_Real = SDL_Fcitx_ProcessKeyEvent;
66        SDL_IME_UpdateTextRect_Real = SDL_Fcitx_UpdateTextRect;
67        SDL_IME_PumpEvents_Real = SDL_Fcitx_PumpEvents;
68    }
69#endif /* HAVE_FCITX_FRONTEND_H */
70
71    /* default to IBus */
72#ifdef HAVE_IBUS_IBUS_H
73    if (!SDL_IME_Init_Real) {
74        SDL_IME_Init_Real = SDL_IBus_Init;
75        SDL_IME_Quit_Real = SDL_IBus_Quit;
76        SDL_IME_SetFocus_Real = SDL_IBus_SetFocus;
77        SDL_IME_Reset_Real = SDL_IBus_Reset;
78        SDL_IME_ProcessKeyEvent_Real = SDL_IBus_ProcessKeyEvent;
79        SDL_IME_UpdateTextRect_Real = SDL_IBus_UpdateTextRect;
80        SDL_IME_PumpEvents_Real = SDL_IBus_PumpEvents;
81    }
82#endif /* HAVE_IBUS_IBUS_H */
83}
84
85SDL_bool
86SDL_IME_Init(void)
87{
88    InitIME();
89
90    if (SDL_IME_Init_Real) {
91        if (SDL_IME_Init_Real()) {
92            return SDL_TRUE;
93        }
94
95        /* uhoh, the IME implementation's init failed! Disable IME support. */
96        SDL_IME_Init_Real = NULL;
97        SDL_IME_Quit_Real = NULL;
98        SDL_IME_SetFocus_Real = NULL;
99        SDL_IME_Reset_Real = NULL;
100        SDL_IME_ProcessKeyEvent_Real = NULL;
101        SDL_IME_UpdateTextRect_Real = NULL;
102        SDL_IME_PumpEvents_Real = NULL;
103    }
104
105    return SDL_FALSE;
106}
107
108void
109SDL_IME_Quit(void)
110{
111    if (SDL_IME_Quit_Real)
112        SDL_IME_Quit_Real();
113}
114
115void
116SDL_IME_SetFocus(SDL_bool focused)
117{
118    if (SDL_IME_SetFocus_Real)
119        SDL_IME_SetFocus_Real(focused);
120}
121
122void
123SDL_IME_Reset(void)
124{
125    if (SDL_IME_Reset_Real)
126        SDL_IME_Reset_Real();
127}
128
129SDL_bool
130SDL_IME_ProcessKeyEvent(Uint32 keysym, Uint32 keycode)
131{
132    if (SDL_IME_ProcessKeyEvent_Real)
133        return SDL_IME_ProcessKeyEvent_Real(keysym, keycode);
134
135    return SDL_FALSE;
136}
137
138void
139SDL_IME_UpdateTextRect(SDL_Rect *rect)
140{
141    if (SDL_IME_UpdateTextRect_Real)
142        SDL_IME_UpdateTextRect_Real(rect);
143}
144
145void
146SDL_IME_PumpEvents()
147{
148    if (SDL_IME_PumpEvents_Real)
149        SDL_IME_PumpEvents_Real();
150}
151
152/* vi: set ts=4 sw=4 expandtab: */
153
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