73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
#include "xbase.h"
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#include "logger.h"
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#include <stdlib.h>
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#include <string.h>
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/* Startup Error handler to check if another
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* window manager is already running. */
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static int x_error_wm_check(Display*, XErrorEvent*);
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Xbase xbase_new(
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const char *const program_title,
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const XErrorHandler x_error_handler
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) {
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if (!XSupportsLocale()) warning("no locale support in X");
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Xbase xbase = malloc(sizeof(struct Xbase));
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if (!xbase) fatal_perror("cannot allocate xbase");
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if (!(xbase->program_title = strdup(program_title))) {
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fatal_perror("no program title is given");
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}
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if (!(xbase->x_display = XOpenDisplay(NULL))) {
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fatal("cannot open X display");
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}
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xbase->x_screen = DefaultScreen(xbase->x_display);
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xbase->x_root = RootWindow(xbase->x_display, xbase->x_screen);
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xbase->screen_sizes = sizes_create_from_args(
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DisplayWidth(xbase->x_display, xbase->x_screen),
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DisplayHeight(xbase->x_display, xbase->x_screen)
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);
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if (!(xbase->x_error = XSetErrorHandler(x_error_wm_check))) {
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fatal("no X error handler is given");
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}
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// This causes an error if some other window manager is running
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XSelectInput(
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xbase->x_display,
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DefaultRootWindow(xbase->x_display),
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SubstructureRedirectMask
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);
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XSync(xbase->x_display, False);
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XSetErrorHandler(x_error_handler);
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XSync(xbase->x_display, False);
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if (!(xbase->atoms = atoms_create(xbase->x_display))) {
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fatal("cannot create atoms");
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}
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return xbase;
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}
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void xbase_delete(const Xbase xbase)
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{
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// TODO: maybe we should assert here
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if (xbase == NULL) return;
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ATOMS_DELETE(xbase->atoms);
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XCloseDisplay(xbase->x_display);
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free(xbase);
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}
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int x_error_wm_check(
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__attribute__((unused)) Display *const x_display,
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__attribute__((unused)) XErrorEvent *const x_error_event
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) {
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fatal("another window manager is already running");
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}
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