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#include "core/types.h"
#include "core/window.h"
#include "internal/utils.h"
#include "core/event.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <xcb/xcb.h>
#include <xcb/xproto.h>
/* TODO(roberto): put the correct error values */
static void _xcb_handle_error(int error) {
switch (error) {
case XCB_WINDOW:
crash_error("Invalid window error\n");
case XCB_PIXMAP:
crash_error("Invalid pixmap error\n");
case XCB_ATOM:
crash_error("Invalid atom error\n");
case XCB_VALUE:
crash_error("Invalid value error\n");
case XCB_MATCH:
crash_error("Match error (incompatible parameters)\n");
case XCB_DRAWABLE:
crash_error("Invalid drawable error\n");
case XCB_ACCESS:
crash_error("Access denied error\n");
case XCB_ALLOC:
crash_error("Resource allocation error\n");
default:
crash_error("Unknown error\n");
}
}
static xcb_atom_t _get_atom_xcb(xcb_connection_t *conn, const char *name) {
xcb_intern_atom_cookie_t cookie;
xcb_intern_atom_reply_t *reply;
xcb_atom_t atom;
cookie = xcb_intern_atom(conn, 0, strlen(name), name);
reply = xcb_intern_atom_reply(conn, cookie, NULL);
if (reply) {
atom = reply->atom;
free(reply);
return atom;
}
return XCB_ATOM_NONE;
}
int _init_xcb_backend(RuimToplevelBackend *backend) {
struct backend_x11 *x11;
xcb_screen_iterator_t iter;
int error = 0;
x11 = (struct backend_x11 *)malloc(sizeof(struct backend_x11));
x11->connection = xcb_connect(NULL, &x11->screen_num);
if ((error = xcb_connection_has_error(x11->connection)) != 0) {
return error;
}
x11->poll.fd = xcb_get_file_descriptor(x11->connection);
x11->poll.events = POLLIN;
x11->setup = xcb_get_setup(x11->connection);
iter = xcb_setup_roots_iterator(x11->setup);
x11->screen = iter.data;
x11->wm_protocols = _get_atom_xcb(x11->connection, "WM_PROTOCOLS");
x11->wm_delete_window = _get_atom_xcb(x11->connection, "WM_DELETE_WINDOW");
backend->data = (void *)x11;
return 0;
}
int _deinit_xcb_backend(RuimToplevelBackend *backend) {
struct backend_x11 *x11 = (struct backend_x11 *)backend->data;
xcb_disconnect(x11->connection);
free(backend->data);
return 0;
}
/* TODO: support more toplevel types */
int _create_toplevel_xcb(RuimToplevel *toplevel) {
int error;
struct backend_x11 *x11_backend;
struct toplevel_x11 *x11_toplevel;
x11_toplevel = (struct toplevel_x11 *)malloc(sizeof(struct toplevel_x11));
x11_toplevel->event_values = (uint32_t *)malloc(sizeof(uint32_t) * 2);
x11_backend = (struct backend_x11 *)toplevel->backend->data;
if ((error = xcb_connection_has_error(x11_backend->connection)) != 0) {
return error;
}
x11_toplevel->window = xcb_generate_id(x11_backend->connection);
x11_toplevel->event_mask = XCB_CW_EVENT_MASK;
x11_toplevel->event_values[0] =
XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS |
XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_STRUCTURE_NOTIFY;
xcb_create_window(x11_backend->connection, XCB_COPY_FROM_PARENT,
x11_toplevel->window, x11_backend->screen->root, 0, 0, 150,
150, 10, XCB_WINDOW_CLASS_INPUT_OUTPUT,
x11_backend->screen->root_visual, x11_toplevel->event_mask,
x11_toplevel->event_values);
xcb_change_property(x11_backend->connection, XCB_PROP_MODE_REPLACE,
x11_toplevel->window, x11_backend->wm_protocols,
XCB_ATOM_ATOM, 32, 1, &x11_backend->wm_delete_window);
xcb_flush(x11_backend->connection);
toplevel->data = (void *)x11_toplevel;
return 0;
}
int _display_toplevel_xcb(RuimToplevel *toplevel) {
struct backend_x11 *x11_backend =
(struct backend_x11 *)toplevel->backend->data;
struct toplevel_x11 *x11_toplevel = (struct toplevel_x11 *)toplevel->data;
xcb_map_window(x11_backend->connection, x11_toplevel->window);
/* FIXME(roberto): decide where to flush the connection */
return xcb_flush(x11_backend->connection) > 0;
}
int _poll_event_xcb(RuimToplevelBackend *backend, RuimEvent *event) {
struct backend_x11 *x11_backend = (struct backend_x11 *)backend->data;
xcb_generic_event_t *x11_event;
int error = 0;
/* FIXME(roberto): make it actually poll */
/* FIXME(roberto): too laggy */
x11_event = xcb_poll_for_event(x11_backend->connection);
if (x11_event != NULL) {
switch (x11_event->response_type & ~0x80) {
case XCB_EXPOSE: {
RuimEventRedraw redraw;
xcb_configure_notify_event_t *cfg =
(xcb_configure_notify_event_t *)x11_event;
event->type = RUIM_EVENT_REDRAW;
redraw.width = cfg->width;
redraw.height = cfg->height;
redraw.x = cfg->x;
redraw.y = cfg->y;
event->data.redraw = redraw;
} break;
case XCB_CLIENT_MESSAGE: {
xcb_client_message_event_t *cm = (xcb_client_message_event_t *)x11_event;
if (cm->data.data32[0] == x11_backend->wm_delete_window) {
event->type = RUIM_EVENT_QUIT;
}
} break;
case XCB_KEY_PRESS: {
xcb_key_press_event_t *key = (xcb_key_press_event_t *)x11_event;
event->type = RUIM_EVENT_KEYDOWN;
event->data.mouse.keycode = key->state;
event->data.mouse.x = key->event_x;
event->data.mouse.y = key->event_y;
} break;
case XCB_KEY_RELEASE: {
xcb_key_release_event_t *key = (xcb_key_press_event_t *)x11_event;
event->type = RUIM_EVENT_KEYUP;
event->data.mouse.keycode = key->state;
event->data.mouse.x = key->event_x;
event->data.mouse.y = key->event_y;
} break;
case XCB_BUTTON_PRESS: {
xcb_button_press_event_t *button = (xcb_button_press_event_t *)x11_event;
event->type = RUIM_EVENT_MOUSEDOWN;
event->data.mouse.keycode = button->state;
event->data.mouse.x = button->event_x;
event->data.mouse.y = button->event_y;
} break;
case XCB_BUTTON_RELEASE: {
xcb_button_release_event_t *button =
(xcb_button_press_event_t *)x11_event;
event->type = RUIM_EVENT_MOUSEUP;
event->data.mouse.keycode = button->state;
event->data.mouse.x = button->event_x;
event->data.mouse.y = button->event_y;
} break;
case XCB_CONFIGURE_NOTIFY: {
xcb_configure_notify_event_t *cfg =
(xcb_configure_notify_event_t *)x11_event;
event->type = RUIM_EVENT_WINDOW;
event->data.window.width = cfg->width;
event->data.window.height = cfg->height;
event->data.window.x = cfg->x;
event->data.window.y = cfg->y;
} break;
default:
break;
}
} else if ((error = xcb_connection_has_error(x11_backend->connection)) != 0) {
_xcb_handle_error(error);
return error;
} else {
event->type = RUIM_EVENT_NOTHING;
}
free(x11_event);
return 0;
}
int _wait_event_xcb(RuimToplevel *toplevel) {
struct backend_x11 *backend = (struct backend_x11 *)toplevel->backend->data;
poll(&backend->poll, 1, 1);
return 0;
}
int _destroy_toplevel_xcb(RuimToplevel *toplevel) {
free(toplevel->data);
return 0;
}
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