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SDL_ime.c (4390B)

      1 /*
      2   Simple DirectMedia Layer
      3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
      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 
     26 typedef SDL_bool (*_SDL_IME_Init)();
     27 typedef void (*_SDL_IME_Quit)();
     28 typedef void (*_SDL_IME_SetFocus)(SDL_bool);
     29 typedef void (*_SDL_IME_Reset)();
     30 typedef SDL_bool (*_SDL_IME_ProcessKeyEvent)(Uint32, Uint32);
     31 typedef void (*_SDL_IME_UpdateTextRect)(SDL_Rect *);
     32 typedef void (*_SDL_IME_PumpEvents)();
     33 
     34 static _SDL_IME_Init SDL_IME_Init_Real = NULL;
     35 static _SDL_IME_Quit SDL_IME_Quit_Real = NULL;
     36 static _SDL_IME_SetFocus SDL_IME_SetFocus_Real = NULL;
     37 static _SDL_IME_Reset SDL_IME_Reset_Real = NULL;
     38 static _SDL_IME_ProcessKeyEvent SDL_IME_ProcessKeyEvent_Real = NULL;
     39 static _SDL_IME_UpdateTextRect SDL_IME_UpdateTextRect_Real = NULL;
     40 static _SDL_IME_PumpEvents SDL_IME_PumpEvents_Real = NULL;
     41 
     42 static void
     43 InitIME()
     44 {
     45     static SDL_bool inited = SDL_FALSE;
     46 #ifdef HAVE_FCITX
     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
     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 */
     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 
     85 SDL_bool
     86 SDL_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 
    108 void
    109 SDL_IME_Quit(void)
    110 {
    111     if (SDL_IME_Quit_Real)
    112         SDL_IME_Quit_Real();
    113 }
    114 
    115 void
    116 SDL_IME_SetFocus(SDL_bool focused)
    117 {
    118     if (SDL_IME_SetFocus_Real)
    119         SDL_IME_SetFocus_Real(focused);
    120 }
    121 
    122 void
    123 SDL_IME_Reset(void)
    124 {
    125     if (SDL_IME_Reset_Real)
    126         SDL_IME_Reset_Real();
    127 }
    128 
    129 SDL_bool
    130 SDL_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 
    138 void
    139 SDL_IME_UpdateTextRect(SDL_Rect *rect)
    140 {
    141     if (SDL_IME_UpdateTextRect_Real)
    142         SDL_IME_UpdateTextRect_Real(rect);
    143 }
    144 
    145 void
    146 SDL_IME_PumpEvents()
    147 {
    148     if (SDL_IME_PumpEvents_Real)
    149         SDL_IME_PumpEvents_Real();
    150 }
    151 
    152 /* vi: set ts=4 sw=4 expandtab: */