kc3-lang/SDL/src/video/wayland/SDL_waylandkeyboard.c

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• Hash : be2cb000
  Author :
  Date : 2022-10-11T11:16:52
  

  wayland: Check for the input handle before checking the keyboard handle

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• src/video/wayland/SDL_waylandkeyboard.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2022 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 SDL_VIDEO_DRIVER_WAYLAND
  
  #include "../SDL_sysvideo.h"
  #include "SDL_waylandvideo.h"
  #include "SDL_waylandevents_c.h"
  #include "text-input-unstable-v3-client-protocol.h"
  
  int
  Wayland_InitKeyboard(_THIS)
  {
  #ifdef SDL_USE_IME
      SDL_VideoData *driverdata = _this->driverdata;
      if (driverdata->text_input_manager == NULL) {
          SDL_IME_Init();
      }
  #endif
  
      return 0;
  }
  
  void
  Wayland_QuitKeyboard(_THIS)
  {
  #ifdef SDL_USE_IME
      SDL_VideoData *driverdata = _this->driverdata;
      if (driverdata->text_input_manager == NULL) {
          SDL_IME_Quit();
      }
  #endif
  }
  
  void
  Wayland_StartTextInput(_THIS)
  {
      SDL_VideoData *driverdata = _this->driverdata;
  
      if (driverdata->text_input_manager) {
          struct SDL_WaylandInput *input = driverdata->input;
          if (input != NULL && input->text_input) {
              const SDL_Rect *rect = &input->text_input->cursor_rect;
  
              /* For some reason this has to be done twice, it appears to be a
               * bug in mutter? Maybe?
               * -flibit
               */
              zwp_text_input_v3_enable(input->text_input->text_input);
              zwp_text_input_v3_commit(input->text_input->text_input);
              zwp_text_input_v3_enable(input->text_input->text_input);
              zwp_text_input_v3_commit(input->text_input->text_input);
  
              /* Now that it's enabled, set the input properties */
              zwp_text_input_v3_set_content_type(input->text_input->text_input,
                                                 ZWP_TEXT_INPUT_V3_CONTENT_HINT_NONE,
                                                 ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_NORMAL);
              if (!SDL_RectEmpty(rect)) {
                  /* This gets reset on enable so we have to cache it */
                  zwp_text_input_v3_set_cursor_rectangle(input->text_input->text_input,
                                                         rect->x,
                                                         rect->y,
                                                         rect->w,
                                                         rect->h);
              }
              zwp_text_input_v3_commit(input->text_input->text_input);
          }
      }
  }
  
  void
  Wayland_StopTextInput(_THIS)
  {
      SDL_VideoData *driverdata = _this->driverdata;
  
      if (driverdata->text_input_manager) {
          struct SDL_WaylandInput *input = driverdata->input;
          if (input != NULL && input->text_input) {
              zwp_text_input_v3_disable(input->text_input->text_input);
              zwp_text_input_v3_commit(input->text_input->text_input);
          }
      }
  
  #ifdef SDL_USE_IME
      else {
          SDL_IME_Reset();
      }
  #endif
  }
  
  void
  Wayland_SetTextInputRect(_THIS, const SDL_Rect *rect)
  {
      SDL_VideoData *driverdata = _this->driverdata;
  
      if (!rect) {
          SDL_InvalidParamError("rect");
          return;
      }
  
      if (driverdata->text_input_manager) {
          struct SDL_WaylandInput *input = driverdata->input;
          if (input != NULL && input->text_input) {
              SDL_copyp(&input->text_input->cursor_rect, rect);
              zwp_text_input_v3_set_cursor_rectangle(input->text_input->text_input,
                                                     rect->x,
                                                     rect->y,
                                                     rect->w,
                                                     rect->h);
              zwp_text_input_v3_commit(input->text_input->text_input);
          }
      }
  
  #ifdef SDL_USE_IME
      else {
          SDL_IME_UpdateTextRect(rect);
      }
  #endif
  }
  
  SDL_bool
  Wayland_HasScreenKeyboardSupport(_THIS)
  {
      /* In reality we just want to return true when the screen keyboard is the
       * _only_ way to get text input. So, in addition to checking for the text
       * input protocol, make sure we don't have any physical keyboards either.
       */
      SDL_VideoData *driverdata = _this->driverdata;
      SDL_bool haskeyboard = (driverdata->input != NULL) && (driverdata->input->keyboard != NULL);
      SDL_bool hastextmanager = (driverdata->text_input_manager != NULL);
      return (!haskeyboard && hastextmanager);
  }
  
  #endif /* SDL_VIDEO_DRIVER_WAYLAND */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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