mirror of
https://github.com/thunderbrewhq/thunderbrew
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214 lines
8.1 KiB
C
214 lines
8.1 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#if defined(SDL_VIDEO_DRIVER_X11) && defined(SDL_VIDEO_DRIVER_X11_XFIXES)
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#include "SDL_x11video.h"
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#include "SDL_x11xfixes.h"
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#include "../../events/SDL_mouse_c.h"
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#include "../../events/SDL_touch_c.h"
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static bool xfixes_initialized = true;
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static int xfixes_selection_notify_event = 0;
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static int query_xfixes_version(Display *display, int major, int minor)
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{
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// We don't care if this fails, so long as it sets major/minor on it's way out the door.
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X11_XFixesQueryVersion(display, &major, &minor);
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return (major * 1000) + minor;
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}
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static bool xfixes_version_atleast(const int version, const int wantmajor, const int wantminor)
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{
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return version >= ((wantmajor * 1000) + wantminor);
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}
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void X11_InitXfixes(SDL_VideoDevice *_this)
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{
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SDL_VideoData *data = _this->internal;
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int version = 0;
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int event, error;
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int fixes_opcode;
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Atom XA_CLIPBOARD = data->atoms.CLIPBOARD;
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if (!SDL_X11_HAVE_XFIXES ||
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!X11_XQueryExtension(data->display, "XFIXES", &fixes_opcode, &event, &error)) {
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return;
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}
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// Selection tracking is available in all versions of XFixes
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xfixes_selection_notify_event = event + XFixesSelectionNotify;
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X11_XFixesSelectSelectionInput(data->display, DefaultRootWindow(data->display),
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XA_CLIPBOARD, XFixesSetSelectionOwnerNotifyMask);
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X11_XFixesSelectSelectionInput(data->display, DefaultRootWindow(data->display),
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XA_PRIMARY, XFixesSetSelectionOwnerNotifyMask);
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// We need at least 5.0 for barriers.
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version = query_xfixes_version(data->display, 5, 0);
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if (!xfixes_version_atleast(version, 5, 0)) {
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return; // X server does not support the version we want at all.
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}
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xfixes_initialized = 1;
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}
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bool X11_XfixesIsInitialized(void)
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{
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return xfixes_initialized;
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}
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int X11_GetXFixesSelectionNotifyEvent(void)
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{
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return xfixes_selection_notify_event;
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}
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bool X11_SetWindowMouseRect(SDL_VideoDevice *_this, SDL_Window *window)
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{
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if (SDL_RectEmpty(&window->mouse_rect)) {
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X11_ConfineCursorWithFlags(_this, window, NULL, 0);
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} else {
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if (window->flags & SDL_WINDOW_INPUT_FOCUS) {
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X11_ConfineCursorWithFlags(_this, window, &window->mouse_rect, 0);
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} else {
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// Save the state for when we get focus again
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SDL_WindowData *wdata = window->internal;
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SDL_memcpy(&wdata->barrier_rect, &window->mouse_rect, sizeof(wdata->barrier_rect));
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wdata->pointer_barrier_active = true;
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}
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}
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return true;
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}
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bool X11_ConfineCursorWithFlags(SDL_VideoDevice *_this, SDL_Window *window, const SDL_Rect *rect, int flags)
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{
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/* Yaakuro: For some reason Xfixes when confining inside a rect where the
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* edges exactly match, a rectangle the cursor 'slips' out of the barrier.
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* To prevent that the lines for the barriers will span the whole screen.
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*/
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SDL_VideoData *data = _this->internal;
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SDL_WindowData *wdata;
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if (!X11_XfixesIsInitialized()) {
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return SDL_Unsupported();
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}
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// If there is already a set of barriers active, disable them.
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if (data->active_cursor_confined_window) {
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X11_DestroyPointerBarrier(_this, data->active_cursor_confined_window);
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}
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SDL_assert(window != NULL);
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wdata = window->internal;
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/* If user did not specify an area to confine, destroy the barrier that was/is assigned to
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* this window it was assigned */
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if (rect) {
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int x1, y1, x2, y2;
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SDL_Rect bounds;
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SDL_GetWindowPosition(window, &bounds.x, &bounds.y);
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SDL_GetWindowSize(window, &bounds.w, &bounds.h);
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/** Negative values are not allowed. Clip values relative to the specified window. */
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x1 = bounds.x + SDL_max(rect->x, 0);
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y1 = bounds.y + SDL_max(rect->y, 0);
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x2 = SDL_min(bounds.x + rect->x + rect->w, bounds.x + bounds.w);
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y2 = SDL_min(bounds.y + rect->y + rect->h, bounds.y + bounds.h);
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if ((wdata->barrier_rect.x != rect->x) ||
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(wdata->barrier_rect.y != rect->y) ||
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(wdata->barrier_rect.w != rect->w) ||
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(wdata->barrier_rect.h != rect->h)) {
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wdata->barrier_rect = *rect;
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}
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// Use the display bounds to ensure the barriers don't have corner gaps
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SDL_GetDisplayBounds(SDL_GetDisplayForWindow(window), &bounds);
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/** Create the left barrier */
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wdata->barrier[0] = X11_XFixesCreatePointerBarrier(data->display, wdata->xwindow,
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x1, bounds.y,
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x1, bounds.y + bounds.h,
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BarrierPositiveX,
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0, NULL);
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/** Create the right barrier */
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wdata->barrier[1] = X11_XFixesCreatePointerBarrier(data->display, wdata->xwindow,
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x2, bounds.y,
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x2, bounds.y + bounds.h,
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BarrierNegativeX,
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0, NULL);
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/** Create the top barrier */
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wdata->barrier[2] = X11_XFixesCreatePointerBarrier(data->display, wdata->xwindow,
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bounds.x, y1,
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bounds.x + bounds.w, y1,
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BarrierPositiveY,
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0, NULL);
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/** Create the bottom barrier */
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wdata->barrier[3] = X11_XFixesCreatePointerBarrier(data->display, wdata->xwindow,
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bounds.x, y2,
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bounds.x + bounds.w, y2,
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BarrierNegativeY,
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0, NULL);
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X11_XFlush(data->display);
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// Lets remember current active confined window.
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data->active_cursor_confined_window = window;
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/* User activated the confinement for this window. We use this later to reactivate
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* the confinement if it got deactivated by FocusOut or UnmapNotify */
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wdata->pointer_barrier_active = true;
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} else {
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X11_DestroyPointerBarrier(_this, window);
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// Only set barrier inactive when user specified NULL and not handled by focus out.
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if (flags != X11_BARRIER_HANDLED_BY_EVENT) {
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wdata->pointer_barrier_active = false;
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}
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}
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return true;
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}
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void X11_DestroyPointerBarrier(SDL_VideoDevice *_this, SDL_Window *window)
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{
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int i;
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SDL_VideoData *data = _this->internal;
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if (window) {
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SDL_WindowData *wdata = window->internal;
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for (i = 0; i < 4; i++) {
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if (wdata->barrier[i] > 0) {
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X11_XFixesDestroyPointerBarrier(data->display, wdata->barrier[i]);
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wdata->barrier[i] = 0;
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}
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}
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X11_XFlush(data->display);
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}
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data->active_cursor_confined_window = NULL;
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}
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#endif // SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_DRIVER_X11_XFIXES
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