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/* Copyright (c) 2012 David Snyder, Benjamin Carr, Braden Wooley
*
* context.c
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <xcb/xcb.h>
#include <xcb/xcb_aux.h>
#include <xcwm/xcwm.h>
#include "xcwm_internal.h"
#include <string.h>
// This init function needs set the window to be registered for events!
// First one we should handle is damage
xcwm_context_t *
xcwm_context_open(char *display, xcwm_context_flags_t flags)
{
xcwm_context_t *context;
xcb_connection_t *conn;
int conn_screen;
xcb_screen_t *root_screen;
xcb_window_t root_window_id;
xcb_void_cookie_t cookie;
uint32_t mask_values[1];
conn = xcb_connect(display, &conn_screen);
if (xcb_connection_has_error(conn)) {
fprintf(stderr, "Cannot open display\n");
return NULL;
}
root_screen = xcb_aux_get_screen(conn, conn_screen);
root_window_id = root_screen->root;
// Set the mask for the root window so we know when new windows
// are created on the root. This is where we add masks for the events
// we care about catching on the root window. We also select all the
// events which only one client is allowed to select on a window,
// to make sure another WM isn't running.
mask_values[0] = XCB_EVENT_MASK_BUTTON_PRESS |
XCB_EVENT_MASK_RESIZE_REDIRECT |
XCB_EVENT_MASK_STRUCTURE_NOTIFY |
XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY |
XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
cookie = xcb_change_window_attributes_checked(conn,
root_window_id,
XCB_CW_EVENT_MASK,
mask_values);
if (_xcwm_request_check(conn, cookie,
"Could not set root window mask.")) {
fprintf(stderr, "Is another window manager running?\n");
xcb_disconnect(conn);
return NULL;
}
xcb_flush(conn);
context = malloc(sizeof(xcwm_context_t));
assert(context);
context->root_window = malloc(sizeof(xcwm_window_t));
assert(context->root_window);
context->flags = flags;
context->conn = conn;
context->conn_screen = conn_screen;
context->root_window->parent = 0;
context->root_window->window_id = root_window_id;
/* FIXME: Should we have a circular assignment like this? */
context->root_window->context = context;
/* Set width, height, x, & y from root_screen into the xcwm_context_t */
context->root_window->bounds.width = root_screen->width_in_pixels;
context->root_window->bounds.height = root_screen->height_in_pixels;
context->root_window->bounds.x = 0;
context->root_window->bounds.y = 0;
if (!_xcwm_init_composite(context))
goto fail;
if (!_xcwm_init_damage(context))
goto fail;
if (!_xcwm_init_xfixes(context))
goto fail;
if (!_xcwm_init_shape(context))
goto fail;
/* Add the root window to our list of windows being managed */
_xcwm_add_window(context->root_window);
if (!_xcwm_init_extension(conn, "XTEST"))
goto fail;
if (!_xcwm_init_extension(conn, "XKEYBOARD"))
goto fail;
if (!(flags & XCWM_DISABLE_SHM)) {
context->has_shm = (_xcwm_init_extension(conn, "MIT-SHM") != NULL);
context->depth = xcb_aux_get_depth(conn, root_screen);
/* Promote 24-bit root window to 32-bit, as we want alpha as well */
if (context->depth == 24) {
context->depth = 32;
}
}
_xcwm_atoms_init(context);
/* Select for XFIXES cursor notify events */
/* We get notified on all cursor changes, irrespective of which window we select on */
xcb_xfixes_select_cursor_input(conn, root_window_id, XCB_XFIXES_CURSOR_NOTIFY_MASK_DISPLAY_CURSOR);
return context;
fail:
free(context->root_window);
free(context);
return NULL;
}
/* Close all windows, the connection, as well as the event loop */
void
xcwm_context_close(xcwm_context_t *context)
{
_xcwm_window_node *head = _xcwm_window_list_head;
xcb_flush(context->conn);
// Close all windows
while (head) {
xcwm_window_request_close(head->window);
_xcwm_window_list_head = head->next;
free(head);
head = _xcwm_window_list_head;
}
/* Free atom related stuff */
_xcwm_atoms_release(context);
// Terminate the event loop
if (_xcwm_event_stop_loop() != 1) {
printf("Event loop failed to close\n");
}
// Disconnect from the display
xcb_disconnect(context->conn);
return;
}
xcwm_window_t *
xcwm_context_get_root_window(xcwm_context_t const *context)
{
return context->root_window;
}
xcb_connection_t *
xcwm_context_get_connection(xcwm_context_t const *context)
{
return context->conn;
}
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