mirror of
https://github.com/gnif/LookingGlass.git
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155 lines
3.4 KiB
C
155 lines
3.4 KiB
C
/*
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Looking Glass - KVM FrameRelay (KVMFR) Client
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Copyright (C) 2017-2021 Geoffrey McRae <geoff@hostfission.com>
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https://looking-glass.hostfission.com
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "interface/displayserver.h"
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#include <SDL2/SDL.h>
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#include "app.h"
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#include "common/debug.h"
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struct SDLDSState
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{
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bool keyboardGrabbed;
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bool pointerGrabbed;
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bool exiting;
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};
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static struct SDLDSState sdl;
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static void sdlInit(SDL_SysWMinfo * info)
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{
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memset(&sdl, 0, sizeof(sdl));
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}
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static void sdlStartup(void)
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{
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}
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static void sdlShutdown(void)
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{
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}
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static void sdlFree(void)
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{
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}
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static bool sdlGetProp(LG_DSProperty prop, void * ret)
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{
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return false;
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}
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static bool sdlEventFilter(SDL_Event * event)
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{
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switch(event->type)
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{
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case SDL_MOUSEMOTION:
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// stop motion events during the warp out of the window
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if (sdl.exiting)
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return true;
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break;
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case SDL_WINDOWEVENT:
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{
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switch(event->window.event)
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{
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/* after leave re-enable warp and cursor processing */
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case SDL_WINDOWEVENT_LEAVE:
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sdl.exiting = false;
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return false;
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}
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break;
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}
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}
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return false;
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}
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static void sdlGrabPointer(void)
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{
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SDL_SetWindowGrab(app_getWindow(), SDL_TRUE);
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SDL_SetRelativeMouseMode(SDL_TRUE);
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sdl.pointerGrabbed = true;
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}
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static void sdlUngrabPointer(void)
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{
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SDL_SetWindowGrab(app_getWindow(), SDL_FALSE);
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SDL_SetRelativeMouseMode(SDL_FALSE);
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sdl.pointerGrabbed = false;
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}
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static void sdlGrabKeyboard(void)
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{
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if (sdl.pointerGrabbed)
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SDL_SetWindowGrab(app_getWindow(), SDL_FALSE);
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else
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{
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DEBUG_WARN("SDL does not support grabbing only the keyboard, grabbing all");
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sdl.pointerGrabbed = true;
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}
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SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
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SDL_SetWindowGrab(app_getWindow(), SDL_TRUE);
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sdl.keyboardGrabbed = true;
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}
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static void sdlUngrabKeyboard(void)
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{
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SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "0");
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SDL_SetWindowGrab(app_getWindow(), SDL_FALSE);
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if (sdl.pointerGrabbed)
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SDL_SetWindowGrab(app_getWindow(), SDL_TRUE);
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sdl.keyboardGrabbed = false;
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}
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static void sdlWarpMouse(int x, int y, bool exiting)
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{
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if (sdl.exiting)
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return;
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sdl.exiting = exiting;
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// if exiting turn off relative mode
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if (exiting)
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SDL_SetRelativeMouseMode(SDL_FALSE);
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// issue the warp
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SDL_WarpMouseInWindow(app_getWindow(), x, y);
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}
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struct LG_DisplayServerOps LGDS_SDL =
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{
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.subsystem = SDL_SYSWM_UNKNOWN,
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.init = sdlInit,
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.startup = sdlStartup,
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.shutdown = sdlShutdown,
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.free = sdlFree,
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.getProp = sdlGetProp,
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.eventFilter = sdlEventFilter,
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.grabPointer = sdlGrabPointer,
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.ungrabPointer = sdlUngrabPointer,
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.grabKeyboard = sdlGrabKeyboard,
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.ungrabKeyboard = sdlUngrabKeyboard,
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.warpMouse = sdlWarpMouse,
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/* SDL does not have clipboard support */
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.cbInit = NULL,
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};
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