/*
* vim:ts=8:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* © 2009 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
*/
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <xcb/xcb.h>
#include <xcb/xcb_wm.h>
#include <X11/XKBlib.h>
#include "i3.h"
#include "debug.h"
#include "table.h"
#include "layout.h"
#include "commands.h"
#include "data.h"
#include "xcb.h"
#include "util.h"
#include "xinerama.h"
#include "config.h"
/* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
since it’d trigger an infinite loop of switching between the different windows when
changing workspaces */
int ignore_notify_event = -1;
/*
* Due to bindings like Mode_switch + <a>, we need to bind some keys in XCB_GRAB_MODE_SYNC.
* Therefore, we just replay all key presses.
*
*/
int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
printf("got key release, just passing\n");
xcb_allow_events(conn, XCB_ALLOW_REPLAY_KEYBOARD, event->time);
xcb_flush(conn);
return 1;
}
/*
* There was a key press. We compare this key code with our bindings table and pass
* the bound action to parse_command().
*
*/
int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
printf("Keypress %d\n", event->detail);
/* We need to get the keysym group (There are group 1 to group 4, each holding
two keysyms (without shift and with shift) using Xkb because X fails to
provide them reliably (it works in Xephyr, it does not in real X) */
XkbStateRec state;
if (XkbGetState(xkbdpy, XkbUseCoreKbd, &state) == Success && (state.group+1) == 2)
event->state |= 0x2;
printf("state %d\n", event->state);
/* Remove the numlock bit, all other bits are modifiers we can bind to */
uint16_t state_filtered = event->state & ~XCB_MOD_MASK_LOCK;
/* Find the binding */
Binding *bind;
TAILQ_FOREACH(bind, &bindings, bindings)
if (bind->keycode == event->detail && bind->mods == state_filtered)
break;
/* No match? Then it was an actively grabbed key, that is with Mode_switch, and
the user did not press Mode_switch, so just pass it… */
if (bind == TAILQ_END(&bindings)) {
xcb_allow_events(conn, ReplayKeyboard, event->time);
xcb_flush(conn);
return 1;
}
parse_command(conn, bind->command);
if (event->state & 0x2) {
printf("Mode_switch -> allow_events(SyncKeyboard)\n");
xcb_allow_events(conn, SyncKeyboard, event->time);
xcb_flush(conn);
}
return 1;
}
/*
* When the user moves the mouse pointer onto a window, this callback gets called.
*
*/
int handle_enter_notify(void *ignored, xcb_connection_t *conn, xcb_enter_notify_event_t *event) {
printf("enter_notify for %08x, serial %d\n", event->event, event->sequence);
/* Some events are not interesting, because they were not generated actively by the
user, but be reconfiguration of windows */
if (event->sequence == ignore_notify_event) {
printf("Ignoring, because of previous map\n");
return 1;
}
/* This was either a focus for a client’s parent (= titlebar)… */
Client *client = table_get(byParent, event->event);
/* …or the client itself */
if (client == NULL)
client = table_get(byChild, event->event);
/* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
if (client == NULL) {
printf("Getting screen at %d x %d\n", event->root_x, event->root_y);
i3Screen *screen = get_screen_containing(event->root_x, event->root_y);
if (screen == NULL) {
printf("ERROR: No such screen\n");
return 0;
}
c_ws = &workspaces[screen->current_workspace];
printf("We're now on virtual screen number %d\n", screen->num);
return 1;
}
set_focus(conn, client);
return 1;
}
int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
printf("button press!\n");
/* This was either a focus for a client’s parent (= titlebar)… */
Client *client = table_get(byChild, event->event);
bool border_click = false;
if (client == NULL) {
client = table_get(byParent, event->event);
border_click = true;
}
if (client == NULL) {
/* The client was neither on a client’s titlebar nor on a client itself, maybe on a stack_window? */
struct Stack_Window *stack_win;
SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
if (stack_win->window == event->event) {
/* A stack window was clicked. We calculate the destination client by
dividing the Y position of the event through the height of a window
decoration and then set the focus to this client. */
i3Font *font = load_font(conn, config.font);
int decoration_height = (font->height + 2 + 2);
int destination = (event->event_y / decoration_height),
c = 0;
Client *client;
printf("Click on stack_win for client %d\n", destination);
CIRCLEQ_FOREACH(client, &(stack_win->container->clients), clients)
if (c++ == destination) {
set_focus(conn, client);
return 1;
}
return 1;
}
return 1;
}
xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
/* Set focus in any case */
set_focus(conn, client);
/* Let’s see if this was on the borders (= resize). If not, we’re done */
printf("press button on x=%d, y=%d\n", event->event_x, event->event_y);
Container *con = client->container,
*first = NULL,
*second = NULL;
enum { O_HORIZONTAL, O_VERTICAL } orientation = O_VERTICAL;
if (con == NULL) {
printf("dock. done.\n");
xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
xcb_flush(conn);
return 1;
}
printf("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
if (!border_click) {
printf("client. done.\n");
xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
xcb_flush(conn);
return 1;
}
if (event->event_y < 2) {
/* This was a press on the top border */
if (con->row == 0)
return 1;
first = con->workspace->table[con->col][con->row-1];
second = con;
orientation = O_HORIZONTAL;
} else if (event->event_y >= (client->rect.height - 2)) {
/* …bottom border */
if (con->row == (con->workspace->rows-1))
return 1;
first = con;
second = con->workspace->table[con->col][con->row+1];
orientation = O_HORIZONTAL;
} else if (event->event_x <= 2) {
/* …left border */
if (con->col == 0)
return 1;
first = con->workspace->table[con->col-1][con->row];
second = con;
} else if (event->event_x > 2) {
/* …right border */
if (con->col == (con->workspace->cols-1))
return 1;
first = con;
second = con->workspace->table[con->col+1][con->row];
}
/* Open a new window, the resizebar. Grab the pointer and move the window around
as the user moves the pointer. */
Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, 0, NULL);
Rect helprect;
if (orientation == O_VERTICAL) {
helprect.x = event->root_x;
helprect.y = 0;
helprect.width = 2;
helprect.height = root_screen->height_in_pixels; /* this has to be the cell’s height */
} else {
helprect.x = 0;
helprect.y = event->root_y;
helprect.width = root_screen->width_in_pixels; /* this has to be the cell’s width */
helprect.height = 2;
}
xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
(orientation == O_VERTICAL ?
XCB_CURSOR_SB_V_DOUBLE_ARROW :
XCB_CURSOR_SB_H_DOUBLE_ARROW), 0, NULL);
uint32_t values[1] = {get_colorpixel(conn, NULL, helpwin, "#4c7899")};
xcb_void_cookie_t cookie = xcb_change_window_attributes_checked(conn, helpwin, XCB_CW_BACK_PIXEL, values);
check_error(conn, cookie, "Could not change window attributes (background color)");
xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
xcb_flush(conn);
xcb_generic_event_t *inside_event;
/* I’ve always wanted to have my own eventhandler… */
while ((inside_event = xcb_wait_for_event(conn))) {
/* Same as get_event_handler in xcb */
int nr = inside_event->response_type;
if (nr == 0) {
/* An error occured */
handle_event(NULL, conn, inside_event);
free(inside_event);
continue;
}
assert(nr < 256);
nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
assert(nr >= 2);
/* Check if we need to escape this loop */
if (nr == XCB_BUTTON_RELEASE)
break;
switch (nr) {
case XCB_MOTION_NOTIFY:
if (orientation == O_VERTICAL) {
values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
} else {
values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_y;
xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
}
xcb_flush(conn);
break;
case XCB_EXPOSE:
/* Use original handler */
xcb_event_handle(&evenths, inside_event);
break;
default:
printf("Ignoring event of type %d\n", nr);
break;
}
free(inside_event);
}
xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
xcb_destroy_window(conn, helpwin);
xcb_destroy_window(conn, grabwin);
xcb_flush(conn);
Workspace *ws = con->workspace;
if (orientation == O_VERTICAL) {
printf("Resize was from X = %d to X = %d\n", event->root_x, values[0]);
/* Convert 0 (for default width_factor) to actual numbers */
if (first->width_factor == 0)
first->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
if (second->width_factor == 0)
second->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
first->width_factor *= (float)(first->width + (values[0] - event->root_x)) / first->width;
second->width_factor *= (float)(second->width - (values[0] - event->root_x)) / second->width;
} else {
printf("Resize was from Y = %d to Y = %d\n", event->root_y, values[0]);
/* Convert 0 (for default height_factor) to actual numbers */
if (first->height_factor == 0)
first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
if (second->height_factor == 0)
second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
first->height_factor *= (float)(first->height + (values[0] - event->root_y)) / first->height;
second->height_factor *= (float)(second->height - (values[0] - event->root_y)) / second->height;
}
render_layout(conn);
return 1;
}
/*
* A new window appeared on the screen (=was mapped), so let’s manage it.
*
*/
int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
window_attributes_t wa = { TAG_VALUE };
wa.u.override_redirect = event->override_redirect;
printf("MapNotify for 0x%08x, serial is %d.\n", event->window, event->sequence);
printf("setting ignore_notify_event = %d\n", event->sequence);
ignore_notify_event = event->sequence;
manage_window(prophs, conn, event->window, wa);
return 1;
}
/*
* Configuration notifies are only handled because we need to set up ignore for the following
* enter notify events
*
*/
int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
printf("handle_configure_event\n");
printf("event->x = %d, ->y = %d, ->width = %d, ->height = %d\n", event->x, event->y, event->width, event->height);
printf("sequence = %d\n", event->sequence);
ignore_notify_event = event->sequence;
if (event->event == root) {
printf("reconfigure of the root window, need to xinerama\n");
xinerama_requery_screens(conn);
return 1;
}
Client *client = table_get(byChild, event->window);
if (client == NULL) {
printf("client not managed, ignoring\n");
return 1;
}
if (client->fullscreen) {
printf("client in fullscreen, not touching\n");
return 1;
}
/* Let’s see if the application has changed size/position on its own *sigh*… */
if ((event->x != client->child_rect.x) ||
(event->y != client->child_rect.y) ||
(event->width != client->child_rect.width) ||
(event->height != client->child_rect.height)) {
/* Who is your window manager? Who’s that, huh? I AM YOUR WINDOW MANAGER! */
printf("Application wanted to resize itself. Fixed that.\n");
client->force_reconfigure = true;
render_container(conn, client->container);
xcb_flush(conn);
}
return 1;
}
/*
* Our window decorations were unmapped. That means, the window will be killed now,
* so we better clean up before.
*
*/
int handle_unmap_notify_event(void *data, xcb_connection_t *conn, xcb_unmap_notify_event_t *event) {
xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
printf("setting ignore_notify_event = %d\n", event->sequence);
ignore_notify_event = event->sequence;
Client *client = table_get(byChild, event->window);
/* First, we need to check if the client is awaiting an unmap-request which
was generated by us reparenting the window. In that case, we just ignore it. */
if (client != NULL && client->awaiting_useless_unmap) {
printf("Dropping this unmap request, it was generated by reparenting\n");
client->awaiting_useless_unmap = false;
return 1;
}
client = table_remove(byChild, event->window);
printf("UnmapNotify for 0x%08x (received from 0x%08x): ", event->window, event->event);
if (client == NULL) {
printf("not a managed window. Ignoring.\n");
return 0;
}
/* Free the client’s colorpixel cache */
struct Colorpixel *colorpixel;
while (!SLIST_EMPTY(&(client->colorpixels))) {
colorpixel = SLIST_FIRST(&(client->colorpixels));
SLIST_REMOVE_HEAD(&(client->colorpixels), colorpixels);
free(colorpixel->hex);
free(colorpixel);
}
if (client->name != NULL)
free(client->name);
if (client->container != NULL) {
Container *con = client->container;
/* If this was the fullscreen client, we need to unset it */
if (client->fullscreen)
con->workspace->fullscreen_client = NULL;
/* If the container will be empty now and is in stacking mode, we need to
correctly resize the stack_win */
if (CIRCLEQ_EMPTY(&(con->clients)) && con->mode == MODE_STACK) {
struct Stack_Window *stack_win = &(con->stack_win);
stack_win->rect.height = 0;
xcb_unmap_window(conn, stack_win->window);
}
/* Remove the client from the list of clients */
CIRCLEQ_REMOVE(&(con->clients), client, clients);
/* Remove from the focus stack */
printf("Removing from focus stack\n");
SLIST_REMOVE(&(con->workspace->focus_stack), client, Client, focus_clients);
/* Remove from currently_focused */
con->currently_focused = NULL;
/* Actually set focus, if there is a window which should get it */
if (!SLIST_EMPTY(&(con->workspace->focus_stack)))
set_focus(conn, SLIST_FIRST(&(con->workspace->focus_stack)));
}
printf("child of 0x%08x.\n", client->frame);
xcb_reparent_window(conn, client->child, root, 0, 0);
xcb_destroy_window(conn, client->frame);
xcb_flush(conn);
table_remove(byParent, client->frame);
cleanup_table(conn, client->container->workspace);
free(client);
render_layout(conn);
return 1;
}
/*
* Called when a window changes its title
*
*/
int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
printf("window's name changed.\n");
Client *client = table_get(byChild, window);
if (client == NULL)
return 1;
if (client->name != NULL)
free(client->name);
client->name_len = xcb_get_property_value_length(prop);
client->name = smalloc(client->name_len);
strncpy(client->name, xcb_get_property_value(prop), client->name_len);
printf("rename to \"%.*s\".\n", client->name_len, client->name);
if (client->container->mode == MODE_STACK)
render_container(conn, client->container);
else decorate_window(conn, client, client->frame, client->titlegc, 0);
xcb_flush(conn);
return 1;
}
/*
* Expose event means we should redraw our windows (= title bar)
*
*/
int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *event) {
printf("got expose_event\n");
/* event->count is the number of minimum remaining expose events for this window, so we
skip all events but the last one */
if (event->count != 0)
return 1;
Client *client = table_get(byParent, event->window);
if (client == NULL) {
/* There was no client in the table, so this is probably an expose event for
one of our stack_windows. */
struct Stack_Window *stack_win;
SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
if (stack_win->window == event->window) {
render_container(conn, stack_win->container);
return 1;
}
return 1;
}
printf("handle_expose_event()\n");
if (client->container->mode != MODE_STACK)
decorate_window(conn, client, client->frame, client->titlegc, 0);
else {
xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND,
get_colorpixel(conn, client, client->frame, "#285577"));
xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &rect);
xcb_flush(conn);
}
return 1;
}
/*
* Handle client messages (EWMH)
*
*/
int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
printf("client_message\n");
if (event->type == atoms[_NET_WM_STATE]) {
if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
return 0;
printf("fullscreen\n");
Client *client = table_get(byChild, event->window);
if (client == NULL)
return 0;
/* Check if the fullscreen state should be toggled */
if ((client->fullscreen &&
(event->data.data32[0] == _NET_WM_STATE_REMOVE ||
event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
(!client->fullscreen &&
(event->data.data32[0] == _NET_WM_STATE_ADD ||
event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
toggle_fullscreen(conn, client);
} else {
printf("unhandled clientmessage\n");
return 0;
}
return 1;
}
int window_type_handler(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
xcb_atom_t atom, xcb_get_property_reply_t *property) {
/* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
before changing this property. */
printf("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
return 0;
}