/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
* xcb.c: Helper functions for easier usage of XCB
*
*/
#include "all.h"
unsigned int xcb_numlock_mask;
/*
* Convenience wrapper around xcb_create_window which takes care of depth, generating an ID and checking
* for errors.
*
*/
xcb_window_t create_window(xcb_connection_t *conn, Rect dims,
uint16_t depth, xcb_visualid_t visual, uint16_t window_class,
enum xcursor_cursor_t cursor, bool map, uint32_t mask, uint32_t *values) {
xcb_window_t result = xcb_generate_id(conn);
/* If the window class is XCB_WINDOW_CLASS_INPUT_ONLY, we copy depth and
* visual id from the parent window. */
if (window_class == XCB_WINDOW_CLASS_INPUT_ONLY) {
depth = XCB_COPY_FROM_PARENT;
visual = XCB_COPY_FROM_PARENT;
}
xcb_void_cookie_t gc_cookie = xcb_create_window(conn,
depth,
result, /* the window id */
root, /* parent == root */
dims.x, dims.y, dims.width, dims.height, /* dimensions */
0, /* border = 0, we draw our own */
window_class,
visual,
mask,
values);
xcb_generic_error_t *error = xcb_request_check(conn, gc_cookie);
if (error != NULL) {
ELOG("Could not create window. Error code: %d.\n", error->error_code);
}
/* Set the cursor */
uint32_t cursor_values[] = {xcursor_get_cursor(cursor)};
xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, cursor_values);
/* Map the window (= make it visible) */
if (map)
xcb_map_window(conn, result);
return result;
}
/*
* Generates a configure_notify_event with absolute coordinates (relative to the X root
* window, not to the client’s frame) for the given client.
*
*/
void fake_absolute_configure_notify(Con *con) {
xcb_rectangle_t absolute;
if (con->window == NULL)
return;
absolute.x = con->rect.x + con->window_rect.x;
absolute.y = con->rect.y + con->window_rect.y;
absolute.width = con->window_rect.width;
absolute.height = con->window_rect.height;
DLOG("fake rect = (%d, %d, %d, %d)\n", absolute.x, absolute.y, absolute.width, absolute.height);
fake_configure_notify(conn, absolute, con->window->id, con->border_width);
}
/*
* Sends the WM_TAKE_FOCUS ClientMessage to the given window
*
*/
void send_take_focus(xcb_window_t window, xcb_timestamp_t timestamp) {
/* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes.
* In order to properly initialize these bytes, we allocate 32 bytes even
* though we only need less for an xcb_configure_notify_event_t */
void *event = scalloc(32, 1);
xcb_client_message_event_t *ev = event;
ev->response_type = XCB_CLIENT_MESSAGE;
ev->window = window;
ev->type = A_WM_PROTOCOLS;
ev->format = 32;
ev->data.data32[0] = A_WM_TAKE_FOCUS;
ev->data.data32[1] = timestamp;
DLOG("Sending WM_TAKE_FOCUS to the client\n");
xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char *)ev);
free(event);
}
/*
* Configures the given window to have the size/position specified by given rect
*
*/
void xcb_set_window_rect(xcb_connection_t *conn, xcb_window_t window, Rect r) {
xcb_void_cookie_t cookie;
cookie = xcb_configure_window(conn, window,
XCB_CONFIG_WINDOW_X |
XCB_CONFIG_WINDOW_Y |
XCB_CONFIG_WINDOW_WIDTH |
XCB_CONFIG_WINDOW_HEIGHT,
&(r.x));
/* ignore events which are generated because we configured a window */
add_ignore_event(cookie.sequence, -1);
}
/*
* Returns the first supported _NET_WM_WINDOW_TYPE atom.
*
*/
xcb_atom_t xcb_get_preferred_window_type(xcb_get_property_reply_t *reply) {
if (reply == NULL || xcb_get_property_value_length(reply) == 0)
return XCB_NONE;
xcb_atom_t *atoms;
if ((atoms = xcb_get_property_value(reply)) == NULL)
return XCB_NONE;
for (int i = 0; i < xcb_get_property_value_length(reply) / (reply->format / 8); i++) {
if (atoms[i] == A__NET_WM_WINDOW_TYPE_NORMAL ||
atoms[i] == A__NET_WM_WINDOW_TYPE_DIALOG ||
atoms[i] == A__NET_WM_WINDOW_TYPE_UTILITY ||
atoms[i] == A__NET_WM_WINDOW_TYPE_TOOLBAR ||
atoms[i] == A__NET_WM_WINDOW_TYPE_SPLASH ||
atoms[i] == A__NET_WM_WINDOW_TYPE_MENU ||
atoms[i] == A__NET_WM_WINDOW_TYPE_DROPDOWN_MENU ||
atoms[i] == A__NET_WM_WINDOW_TYPE_POPUP_MENU ||
atoms[i] == A__NET_WM_WINDOW_TYPE_TOOLTIP ||
atoms[i] == A__NET_WM_WINDOW_TYPE_NOTIFICATION) {
return atoms[i];
}
}
return XCB_NONE;
}
/*
* Returns true if the given reply contains the given atom.
*
*/
bool xcb_reply_contains_atom(xcb_get_property_reply_t *prop, xcb_atom_t atom) {
if (prop == NULL || xcb_get_property_value_length(prop) == 0)
return false;
xcb_atom_t *atoms;
if ((atoms = xcb_get_property_value(prop)) == NULL)
return false;
for (int i = 0; i < xcb_get_property_value_length(prop) / (prop->format / 8); i++)
if (atoms[i] == atom)
return true;
return false;
}
/*
* Get depth of visual specified by visualid
*
*/
uint16_t get_visual_depth(xcb_visualid_t visual_id) {
xcb_depth_iterator_t depth_iter;
depth_iter = xcb_screen_allowed_depths_iterator(root_screen);
for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
xcb_visualtype_iterator_t visual_iter;
visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
for (; visual_iter.rem; xcb_visualtype_next(&visual_iter)) {
if (visual_id == visual_iter.data->visual_id) {
return depth_iter.data->depth;
}
}
}
return 0;
}
/*
* Get visual type specified by visualid
*
*/
xcb_visualtype_t *get_visualtype_by_id(xcb_visualid_t visual_id) {
xcb_depth_iterator_t depth_iter;
depth_iter = xcb_screen_allowed_depths_iterator(root_screen);
for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
xcb_visualtype_iterator_t visual_iter;
visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
for (; visual_iter.rem; xcb_visualtype_next(&visual_iter)) {
if (visual_id == visual_iter.data->visual_id) {
return visual_iter.data;
}
}
}
return 0;
}
/*
* Get visualid with specified depth
*
*/
xcb_visualid_t get_visualid_by_depth(uint16_t depth) {
xcb_depth_iterator_t depth_iter;
depth_iter = xcb_screen_allowed_depths_iterator(root_screen);
for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
if (depth_iter.data->depth != depth)
continue;
xcb_visualtype_iterator_t visual_iter;
visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
if (!visual_iter.rem)
continue;
return visual_iter.data->visual_id;
}
return 0;
}
/*
* Add an atom to a list of atoms the given property defines.
* This is useful, for example, for manipulating _NET_WM_STATE.
*
*/
void xcb_add_property_atom(xcb_connection_t *conn, xcb_window_t window, xcb_atom_t property, xcb_atom_t atom) {
xcb_change_property(conn, XCB_PROP_MODE_APPEND, window, property, XCB_ATOM_ATOM, 32, 1, (uint32_t[]){atom});
}
/*
* Remove an atom from a list of atoms the given property defines without
* removing any other potentially set atoms. This is useful, for example, for
* manipulating _NET_WM_STATE.
*
*/
void xcb_remove_property_atom(xcb_connection_t *conn, xcb_window_t window, xcb_atom_t property, xcb_atom_t atom) {
xcb_grab_server(conn);
xcb_get_property_reply_t *reply =
xcb_get_property_reply(conn,
xcb_get_property(conn, false, window, property, XCB_GET_PROPERTY_TYPE_ANY, 0, 4096), NULL);
if (reply == NULL || xcb_get_property_value_length(reply) == 0)
goto release_grab;
xcb_atom_t *atoms = xcb_get_property_value(reply);
if (atoms == NULL) {
goto release_grab;
}
{
int num = 0;
const int current_size = xcb_get_property_value_length(reply) / (reply->format / 8);
xcb_atom_t values[current_size];
for (int i = 0; i < current_size; i++) {
if (atoms[i] != atom)
values[num++] = atoms[i];
}
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, window, property, XCB_ATOM_ATOM, 32, num, values);
}
release_grab:
FREE(reply);
xcb_ungrab_server(conn);
}
/*
* Grab the specified buttons on a window when managing it.
*
*/
void xcb_grab_buttons(xcb_connection_t *conn, xcb_window_t window, int *buttons) {
int i = 0;
while (buttons[i] > 0) {
xcb_grab_button(conn, false, window, XCB_EVENT_MASK_BUTTON_PRESS, XCB_GRAB_MODE_SYNC,
XCB_GRAB_MODE_ASYNC, root, XCB_NONE, buttons[i], XCB_BUTTON_MASK_ANY);
i++;
}
}