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i3/src/handlers.c
Ingo Bürk 0dd71674de Rename tree_close() to tree_close_internal(). 
It should be clear for callers of this function that this is an internal
function that skips certain validations which might be important. Therefore
we make it clear that this is an internal function by renaming it.

relates to #1761
2015-12-27 20:58:35 -05:00

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#undef I3__FILE__
#define I3__FILE__ "handlers.c"
/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
* handlers.c: Small handlers for various events (keypresses, focus changes,
* …).
*
*/
#include "all.h"
#include <time.h>
#include <float.h>
#include <sys/time.h>
#include <xcb/randr.h>
#define SN_API_NOT_YET_FROZEN 1
#include <libsn/sn-monitor.h>
int randr_base = -1;
int xkb_base = -1;
int xkb_current_group;
/* 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 */
static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
/*
* Adds the given sequence to the list of events which are ignored.
* If this ignore should only affect a specific response_type, pass
* response_type, otherwise, pass -1.
*
* Every ignored sequence number gets garbage collected after 5 seconds.
*
*/
void add_ignore_event(const int sequence, const int response_type) {
struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
event->sequence = sequence;
event->response_type = response_type;
event->added = time(NULL);
SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
}
/*
* Checks if the given sequence is ignored and returns true if so.
*
*/
bool event_is_ignored(const int sequence, const int response_type) {
struct Ignore_Event *event;
time_t now = time(NULL);
for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
if ((now - event->added) > 5) {
struct Ignore_Event *save = event;
event = SLIST_NEXT(event, ignore_events);
SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
free(save);
} else
event = SLIST_NEXT(event, ignore_events);
}
SLIST_FOREACH(event, &ignore_events, ignore_events) {
if (event->sequence != sequence)
continue;
if (event->response_type != -1 &&
event->response_type != response_type)
continue;
/* instead of removing a sequence number we better wait until it gets
* garbage collected. it may generate multiple events (there are multiple
* enter_notifies for one configure_request, for example). */
//SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
//free(event);
return true;
}
return false;
}
/*
* Called with coordinates of an enter_notify event or motion_notify event
* to check if the user crossed virtual screen boundaries and adjust the
* current workspace, if so.
*
*/
static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
Output *output;
/* If the user disable focus follows mouse, we have nothing to do here */
if (config.disable_focus_follows_mouse)
return;
if ((output = get_output_containing(x, y)) == NULL) {
ELOG("ERROR: No such screen\n");
return;
}
if (output->con == NULL) {
ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
return;
}
/* Focus the output on which the user moved their cursor */
Con *old_focused = focused;
Con *next = con_descend_focused(output_get_content(output->con));
/* Since we are switching outputs, this *must* be a different workspace, so
* call workspace_show() */
workspace_show(con_get_workspace(next));
con_focus(next);
/* If the focus changed, we re-render to get updated decorations */
if (old_focused != focused)
tree_render();
}
/*
* When the user moves the mouse pointer onto a window, this callback gets called.
*
*/
static void handle_enter_notify(xcb_enter_notify_event_t *event) {
Con *con;
last_timestamp = event->time;
DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
event->event, event->mode, event->detail, event->sequence);
DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
DLOG("This was not a normal notify, ignoring\n");
return;
}
/* Some events are not interesting, because they were not generated
* actively by the user, but by reconfiguration of windows */
if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
DLOG("Event ignored\n");
return;
}
bool enter_child = false;
/* Get container by frame or by child window */
if ((con = con_by_frame_id(event->event)) == NULL) {
con = con_by_window_id(event->event);
enter_child = true;
}
/* If not, then the user moved their cursor to the root window. In that case, we adjust c_ws */
if (con == NULL) {
DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
check_crossing_screen_boundary(event->root_x, event->root_y);
return;
}
if (con->parent->type == CT_DOCKAREA) {
DLOG("Ignoring, this is a dock client\n");
return;
}
/* see if the user entered the window on a certain window decoration */
layout_t layout = (enter_child ? con->parent->layout : con->layout);
if (layout == L_DEFAULT) {
Con *child;
TAILQ_FOREACH(child, &(con->nodes_head), nodes)
if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
LOG("using child %p / %s instead!\n", child, child->name);
con = child;
break;
}
}
#if 0
if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
/* This can happen when a client gets assigned to a different workspace than
* the current one (see src/mainx.c:reparent_window). Shortly after it was created,
* an enter_notify will follow. */
DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
return 1;
}
#endif
if (config.disable_focus_follows_mouse)
return;
/* if this container is already focused, there is nothing to do. */
if (con == focused)
return;
/* Get the currently focused workspace to check if the focus change also
* involves changing workspaces. If so, we need to call workspace_show() to
* correctly update state and send the IPC event. */
Con *ws = con_get_workspace(con);
if (ws != con_get_workspace(focused))
workspace_show(ws);
focused_id = XCB_NONE;
con_focus(con_descend_focused(con));
tree_render();
return;
}
/*
* When the user moves the mouse but does not change the active window
* (e.g. when having no windows opened but moving mouse on the root screen
* and crossing virtual screen boundaries), this callback gets called.
*
*/
static void handle_motion_notify(xcb_motion_notify_event_t *event) {
last_timestamp = event->time;
/* Skip events where the pointer was over a child window, we are only
* interested in events on the root window. */
if (event->child != XCB_NONE)
return;
Con *con;
if ((con = con_by_frame_id(event->event)) == NULL) {
DLOG("MotionNotify for an unknown container, checking if it crosses screen boundaries.\n");
check_crossing_screen_boundary(event->root_x, event->root_y);
return;
}
if (config.disable_focus_follows_mouse)
return;
if (con->layout != L_DEFAULT && con->layout != L_SPLITV && con->layout != L_SPLITH)
return;
/* see over which rect the user is */
Con *current;
TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
continue;
/* We found the rect, let’s see if this window is focused */
if (TAILQ_FIRST(&(con->focus_head)) == current)
return;
con_focus(current);
x_push_changes(croot);
return;
}
}
/*
* Called when the keyboard mapping changes (for example by using Xmodmap),
* we need to update our key bindings then (re-translate symbols).
*
*/
static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
if (event->request != XCB_MAPPING_KEYBOARD &&
event->request != XCB_MAPPING_MODIFIER)
return;
DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
xcb_refresh_keyboard_mapping(keysyms, event);
xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
ungrab_all_keys(conn);
translate_keysyms();
grab_all_keys(conn);
return;
}
/*
* A new window appeared on the screen (=was mapped), so let’s manage it.
*
*/
static void handle_map_request(xcb_map_request_event_t *event) {
xcb_get_window_attributes_cookie_t cookie;
cookie = xcb_get_window_attributes_unchecked(conn, event->window);
DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
add_ignore_event(event->sequence, -1);
manage_window(event->window, cookie, false);
return;
}
/*
* Configure requests are received when the application wants to resize windows
* on their own.
*
* We generate a synthethic configure notify event to signalize the client its
* "new" position.
*
*/
static void handle_configure_request(xcb_configure_request_event_t *event) {
Con *con;
DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
event->window, event->x, event->y, event->width, event->height);
/* For unmanaged windows, we just execute the configure request. As soon as
* it gets mapped, we will take over anyways. */
if ((con = con_by_window_id(event->window)) == NULL) {
DLOG("Configure request for unmanaged window, can do that.\n");
uint32_t mask = 0;
uint32_t values[7];
int c = 0;
#define COPY_MASK_MEMBER(mask_member, event_member) \
do { \
if (event->value_mask & mask_member) { \
mask |= mask_member; \
values[c++] = event->event_member; \
} \
} while (0)
COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
xcb_configure_window(conn, event->window, mask, values);
xcb_flush(conn);
return;
}
DLOG("Configure request!\n");
Con *workspace = con_get_workspace(con),
*fullscreen = NULL;
/* There might not be a corresponding workspace for dock cons, therefore we
* have to be careful here. */
if (workspace) {
fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
if (!fullscreen)
fullscreen = con_get_fullscreen_con(workspace, CF_GLOBAL);
}
if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) {
/* find the height for the decorations */
int deco_height = con->deco_rect.height;
/* we actually need to apply the size/position changes to the *parent*
* container */
Rect bsr = con_border_style_rect(con);
if (con->border_style == BS_NORMAL) {
bsr.y += deco_height;
bsr.height -= deco_height;
}
Con *floatingcon = con->parent;
if (strcmp(con_get_workspace(floatingcon)->name, "__i3_scratch") == 0) {
DLOG("This is a scratchpad container, ignoring ConfigureRequest\n");
return;
}
Rect newrect = floatingcon->rect;
if (event->value_mask & XCB_CONFIG_WINDOW_X) {
newrect.x = event->x + (-1) * bsr.x;
DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
}
if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
newrect.y = event->y + (-1) * bsr.y;
DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
}
if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
newrect.width = event->width + (-1) * bsr.width;
newrect.width += con->border_width * 2;
DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
event->width, newrect.width, con->border_width);
}
if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
newrect.height = event->height + (-1) * bsr.height;
newrect.height += con->border_width * 2;
DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
event->height, newrect.height, con->border_width);
}
DLOG("Container is a floating leaf node, will do that.\n");
floating_reposition(floatingcon, newrect);
return;
}
/* Dock windows can be reconfigured in their height and moved to another output. */
if (con->parent && con->parent->type == CT_DOCKAREA) {
DLOG("Reconfiguring dock window (con = %p).\n", con);
if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
DLOG("Dock client wants to change height to %d, we can do that.\n", event->height);
con->geometry.height = event->height;
tree_render();
}
if (event->value_mask & XCB_CONFIG_WINDOW_X || event->value_mask & XCB_CONFIG_WINDOW_Y) {
int16_t x = event->value_mask & XCB_CONFIG_WINDOW_X ? event->x : (int16_t)con->geometry.x;
int16_t y = event->value_mask & XCB_CONFIG_WINDOW_Y ? event->y : (int16_t)con->geometry.y;
Con *current_output = con_get_output(con);
Output *target = get_output_containing(x, y);
if (target != NULL && current_output != target->con) {
DLOG("Dock client is requested to be moved to output %s, moving it there.\n", target->name);
Match *match;
Con *nc = con_for_window(target->con, con->window, &match);
DLOG("Dock client will be moved to container %p.\n", nc);
con_detach(con);
con_attach(con, nc, false);
tree_render();
} else {
DLOG("Dock client will not be moved, we only support moving it to another output.\n");
}
}
}
fake_absolute_configure_notify(con);
return;
}
#if 0
/*
* 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) {
DLOG("configure_event, sequence %d\n", event->sequence);
/* We ignore this sequence twice because events for child and frame should be ignored */
add_ignore_event(event->sequence);
add_ignore_event(event->sequence);
return 1;
}
#endif
/*
* Gets triggered upon a RandR screen change event, that is when the user
* changes the screen configuration in any way (mode, position, …)
*
*/
static void handle_screen_change(xcb_generic_event_t *e) {
DLOG("RandR screen change\n");
/* The geometry of the root window is used for “fullscreen global” and
* changes when new outputs are added. */
xcb_get_geometry_cookie_t cookie = xcb_get_geometry(conn, root);
xcb_get_geometry_reply_t *reply = xcb_get_geometry_reply(conn, cookie, NULL);
if (reply == NULL) {
ELOG("Could not get geometry of the root window, exiting\n");
exit(1);
}
DLOG("root geometry reply: (%d, %d) %d x %d\n", reply->x, reply->y, reply->width, reply->height);
croot->rect.width = reply->width;
croot->rect.height = reply->height;
randr_query_outputs();
scratchpad_fix_resolution();
ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
return;
}
/*
* Our window decorations were unmapped. That means, the window will be killed
* now, so we better clean up before.
*
*/
static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
xcb_get_input_focus_cookie_t cookie;
Con *con = con_by_window_id(event->window);
if (con == NULL) {
/* This could also be an UnmapNotify for the frame. We need to
* decrement the ignore_unmap counter. */
con = con_by_frame_id(event->window);
if (con == NULL) {
LOG("Not a managed window, ignoring UnmapNotify event\n");
return;
}
if (con->ignore_unmap > 0)
con->ignore_unmap--;
/* See the end of this function. */
cookie = xcb_get_input_focus(conn);
DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
goto ignore_end;
}
/* See the end of this function. */
cookie = xcb_get_input_focus(conn);
if (con->ignore_unmap > 0) {
DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
con->ignore_unmap--;
goto ignore_end;
}
tree_close_internal(con, DONT_KILL_WINDOW, false, false);
tree_render();
ignore_end:
/* If the client (as opposed to i3) destroyed or unmapped a window, an
* EnterNotify event will follow (indistinguishable from an EnterNotify
* event caused by moving your mouse), causing i3 to set focus to whichever
* window is now visible.
*
* In a complex stacked or tabbed layout (take two v-split containers in a
* tabbed container), when the bottom window in tab2 is closed, the bottom
* window of tab1 is visible instead. X11 will thus send an EnterNotify
* event for the bottom window of tab1, while the focus should be set to
* the remaining window of tab2.
*
* Therefore, we ignore all EnterNotify events which have the same sequence
* as an UnmapNotify event. */
add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
/* Since we just ignored the sequence of this UnmapNotify, we want to make
* sure that following events use a different sequence. When putting xterm
* into fullscreen and moving the pointer to a different window, without
* using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
* with the same sequence and thus were ignored (see ticket #609). */
free(xcb_get_input_focus_reply(conn, cookie, NULL));
}
/*
* A destroy notify event is sent when the window is not unmapped, but
* immediately destroyed (for example when starting a window and immediately
* killing the program which started it).
*
* We just pass on the event to the unmap notify handler (by copying the
* important fields in the event data structure).
*
*/
static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
xcb_unmap_notify_event_t unmap;
unmap.sequence = event->sequence;
unmap.event = event->event;
unmap.window = event->window;
handle_unmap_notify_event(&unmap);
}
static bool window_name_changed(i3Window *window, char *old_name) {
if ((old_name == NULL) && (window->name == NULL))
return false;
/* Either the old or the new one is NULL, but not both. */
if ((old_name == NULL) ^ (window->name == NULL))
return true;
return (strcmp(old_name, i3string_as_utf8(window->name)) != 0);
}
/*
* Called when a window changes its title
*
*/
static bool 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) {
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
return false;
char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
window_update_name(con->window, prop, false);
x_push_changes(croot);
if (window_name_changed(con->window, old_name))
ipc_send_window_event("title", con);
FREE(old_name);
return true;
}
/*
* Handles legacy window name updates (WM_NAME), see also src/window.c,
* window_update_name_legacy().
*
*/
static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
return false;
char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
window_update_name_legacy(con->window, prop, false);
x_push_changes(croot);
if (window_name_changed(con->window, old_name))
ipc_send_window_event("title", con);
FREE(old_name);
return true;
}
/*
* Called when a window changes its WM_WINDOW_ROLE.
*
*/
static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
return false;
window_update_role(con->window, prop, false);
return true;
}
#if 0
/*
* Updates the client’s WM_CLASS property
*
*/
static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
return 1;
window_update_class(con->window, prop, false);
return 0;
}
#endif
/*
* Expose event means we should redraw our windows (= title bar)
*
*/
static void handle_expose_event(xcb_expose_event_t *event) {
Con *parent;
DLOG("window = %08x\n", event->window);
if ((parent = con_by_frame_id(event->window)) == NULL) {
LOG("expose event for unknown window, ignoring\n");
return;
}
/* Since we render to our surface on every change anyways, expose events
* only tell us that the X server lost (parts of) the window contents. We
* can handle that by copying the appropriate part from our surface to the
* window. */
draw_util_copy_surface(conn, &(parent->frame_buffer), &(parent->frame),
event->x, event->y, event->x, event->y,
event->width, event->height);
xcb_flush(conn);
return;
}
#define _NET_WM_MOVERESIZE_SIZE_TOPLEFT 0
#define _NET_WM_MOVERESIZE_SIZE_TOP 1
#define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT 2
#define _NET_WM_MOVERESIZE_SIZE_RIGHT 3
#define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT 4
#define _NET_WM_MOVERESIZE_SIZE_BOTTOM 5
#define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT 6
#define _NET_WM_MOVERESIZE_SIZE_LEFT 7
#define _NET_WM_MOVERESIZE_MOVE 8 /* movement only */
#define _NET_WM_MOVERESIZE_SIZE_KEYBOARD 9 /* size via keyboard */
#define _NET_WM_MOVERESIZE_MOVE_KEYBOARD 10 /* move via keyboard */
#define _NET_WM_MOVERESIZE_CANCEL 11 /* cancel operation */
/*
* Handle client messages (EWMH)
*
*/
static void handle_client_message(xcb_client_message_event_t *event) {
/* If this is a startup notification ClientMessage, the library will handle
* it and call our monitor_event() callback. */
if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t *)event))
return;
LOG("ClientMessage for window 0x%08x\n", event->window);
if (event->type == A__NET_WM_STATE) {
if (event->format != 32 ||
(event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN &&
event->data.data32[1] != A__NET_WM_STATE_DEMANDS_ATTENTION &&
event->data.data32[1] != A__NET_WM_STATE_STICKY)) {
DLOG("Unknown atom in clientmessage of type %d\n", event->data.data32[1]);
return;
}
Con *con = con_by_window_id(event->window);
if (con == NULL) {
DLOG("Could not get window for client message\n");
return;
}
if (event->data.data32[1] == A__NET_WM_STATE_FULLSCREEN) {
/* Check if the fullscreen state should be toggled */
if ((con->fullscreen_mode != CF_NONE &&
(event->data.data32[0] == _NET_WM_STATE_REMOVE ||
event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
(con->fullscreen_mode == CF_NONE &&
(event->data.data32[0] == _NET_WM_STATE_ADD ||
event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
DLOG("toggling fullscreen\n");
con_toggle_fullscreen(con, CF_OUTPUT);
}
} else if (event->data.data32[1] == A__NET_WM_STATE_DEMANDS_ATTENTION) {
/* Check if the urgent flag must be set or not */
if (event->data.data32[0] == _NET_WM_STATE_ADD)
con_set_urgency(con, true);
else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
con_set_urgency(con, false);
else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
con_set_urgency(con, !con->urgent);
} else if (event->data.data32[1] == A__NET_WM_STATE_STICKY) {
DLOG("Received a client message to modify _NET_WM_STATE_STICKY.\n");
if (event->data.data32[0] == _NET_WM_STATE_ADD)
con->sticky = true;
else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
con->sticky = false;
else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
con->sticky = !con->sticky;
DLOG("New sticky status for con = %p is %i.\n", con, con->sticky);
output_push_sticky_windows(focused);
}
tree_render();
} else if (event->type == A__NET_ACTIVE_WINDOW) {
if (event->format != 32)
return;
DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window);
Con *con = con_by_window_id(event->window);
if (con == NULL) {
DLOG("Could not get window for client message\n");
return;
}
Con *ws = con_get_workspace(con);
if (ws == NULL) {
DLOG("Window is not being managed, ignoring _NET_ACTIVE_WINDOW\n");
return;
}
if (con_is_internal(ws)) {
DLOG("Workspace is internal, ignoring _NET_ACTIVE_WINDOW\n");
return;
}
/* data32[0] indicates the source of the request (application or pager) */
if (event->data.data32[0] == 2) {
/* Always focus the con if it is from a pager, because this is most
* likely from some user action */
DLOG("This request came from a pager. Focusing con = %p\n", con);
workspace_show(ws);
con_focus(con);
} else {
/* Request is from an application. */
if (config.focus_on_window_activation == FOWA_FOCUS || (config.focus_on_window_activation == FOWA_SMART && workspace_is_visible(ws))) {
DLOG("Focusing con = %p\n", con);
workspace_show(ws);
con_focus(con);
} else if (config.focus_on_window_activation == FOWA_URGENT || (config.focus_on_window_activation == FOWA_SMART && !workspace_is_visible(ws))) {
DLOG("Marking con = %p urgent\n", con);
con_set_urgency(con, true);
} else
DLOG("Ignoring request for con = %p.\n", con);
}
tree_render();
} else if (event->type == A_I3_SYNC) {
xcb_window_t window = event->data.data32[0];
uint32_t rnd = event->data.data32[1];
DLOG("[i3 sync protocol] Sending random value %d back to X11 window 0x%08x\n", rnd, window);
void *reply = scalloc(32, 1);
xcb_client_message_event_t *ev = reply;
ev->response_type = XCB_CLIENT_MESSAGE;
ev->window = window;
ev->type = A_I3_SYNC;
ev->format = 32;
ev->data.data32[0] = window;
ev->data.data32[1] = rnd;
xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char *)ev);
xcb_flush(conn);
free(reply);
} else if (event->type == A__NET_REQUEST_FRAME_EXTENTS) {
/*
* A client can request an estimate for the frame size which the window
* manager will put around it before actually mapping its window. Java
* does this (as of openjdk-7).
*
* Note that the calculation below is not entirely accurate — once you
* set a different border type, it’s off. We _could_ request all the
* window properties (which have to be set up at this point according
* to EWMH), but that seems rather elaborate. The standard explicitly
* says the application must cope with an estimate that is not entirely
* accurate.
*/
DLOG("_NET_REQUEST_FRAME_EXTENTS for window 0x%08x\n", event->window);
/* The reply data: approximate frame size */
Rect r = {
config.default_border_width, /* left */
config.default_border_width, /* right */
config.font.height + 5, /* top */
config.default_border_width /* bottom */
};
xcb_change_property(
conn,
XCB_PROP_MODE_REPLACE,
event->window,
A__NET_FRAME_EXTENTS,
XCB_ATOM_CARDINAL, 32, 4,
&r);
xcb_flush(conn);
} else if (event->type == A__NET_CURRENT_DESKTOP) {
/* This request is used by pagers and bars to change the current
* desktop likely as a result of some user action. We interpret this as
* a request to focus the given workspace. See
* http://standards.freedesktop.org/wm-spec/latest/ar01s03.html#idm140251368135008
* */
Con *output;
uint32_t idx = 0;
DLOG("Request to change current desktop to index %d\n", event->data.data32[0]);
TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
Con *ws;
TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
if (STARTS_WITH(ws->name, "__"))
continue;
if (idx == event->data.data32[0]) {
/* data32[1] is a timestamp used to prevent focus race conditions */
if (event->data.data32[1])
last_timestamp = event->data.data32[1];
DLOG("Handling request to focus workspace %s\n", ws->name);
workspace_show(ws);
tree_render();
return;
}
++idx;
}
}
} else if (event->type == A__NET_CLOSE_WINDOW) {
/*
* Pagers wanting to close a window MUST send a _NET_CLOSE_WINDOW
* client message request to the root window.
* http://standards.freedesktop.org/wm-spec/wm-spec-latest.html#idm140200472668896
*/
Con *con = con_by_window_id(event->window);
if (con) {
DLOG("Handling _NET_CLOSE_WINDOW request (con = %p)\n", con);
if (event->data.data32[0])
last_timestamp = event->data.data32[0];
tree_close_internal(con, KILL_WINDOW, false, false);
tree_render();
} else {
DLOG("Couldn't find con for _NET_CLOSE_WINDOW request. (window = %d)\n", event->window);
}
} else if (event->type == A__NET_WM_MOVERESIZE) {
/*
* Client-side decorated Gtk3 windows emit this signal when being
* dragged by their GtkHeaderBar
*/
Con *con = con_by_window_id(event->window);
if (!con || !con_is_floating(con)) {
DLOG("Couldn't find con for _NET_WM_MOVERESIZE request, or con not floating (window = %d)\n", event->window);
return;
}
DLOG("Handling _NET_WM_MOVERESIZE request (con = %p)\n", con);
uint32_t direction = event->data.data32[2];
uint32_t x_root = event->data.data32[0];
uint32_t y_root = event->data.data32[1];
/* construct fake xcb_button_press_event_t */
xcb_button_press_event_t fake = {
.root_x = x_root,
.root_y = y_root,
.event_x = x_root - (con->rect.x),
.event_y = y_root - (con->rect.y)};
switch (direction) {
case _NET_WM_MOVERESIZE_MOVE:
floating_drag_window(con->parent, &fake);
break;
case _NET_WM_MOVERESIZE_SIZE_TOPLEFT... _NET_WM_MOVERESIZE_SIZE_LEFT:
floating_resize_window(con->parent, false, &fake);
break;
default:
DLOG("_NET_WM_MOVERESIZE direction %d not implemented\n", direction);
break;
}
} else {
DLOG("unhandled clientmessage\n");
return;
}
}
bool handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
xcb_atom_t atom, xcb_get_property_reply_t *reply) {
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
return false;
window_update_type(con->window, reply);
return true;
}
/*
* Handles the size hints set by a window, but currently only the part necessary for displaying
* clients proportionally inside their frames (mplayer for example)
*
* See ICCCM 4.1.2.3 for more details
*
*/
static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
xcb_atom_t name, xcb_get_property_reply_t *reply) {
Con *con = con_by_window_id(window);
if (con == NULL) {
DLOG("Received WM_NORMAL_HINTS for unknown client\n");
return false;
}
xcb_size_hints_t size_hints;
//CLIENT_LOG(client);
/* If the hints were already in this event, use them, if not, request them */
if (reply != NULL)
xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
else
xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
// TODO: Minimum size is not yet implemented
DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
}
bool changed = false;
if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
if (con->window->width_increment != size_hints.width_inc) {
con->window->width_increment = size_hints.width_inc;
changed = true;
}
if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
if (con->window->height_increment != size_hints.height_inc) {
con->window->height_increment = size_hints.height_inc;
changed = true;
}
if (changed)
DLOG("resize increments changed\n");
}
int base_width = 0, base_height = 0;
/* base_width/height are the desired size of the window.
We check if either the program-specified size or the program-specified
min-size is available */
if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
base_width = size_hints.base_width;
base_height = size_hints.base_height;
} else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
/* TODO: is this right? icccm says not */
base_width = size_hints.min_width;
base_height = size_hints.min_height;
}
if (base_width != con->window->base_width ||
base_height != con->window->base_height) {
con->window->base_width = base_width;
con->window->base_height = base_height;
DLOG("client's base_height changed to %d\n", base_height);
DLOG("client's base_width changed to %d\n", base_width);
changed = true;
}
/* If no aspect ratio was set or if it was invalid, we ignore the hints */
if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
(size_hints.min_aspect_num <= 0) ||
(size_hints.min_aspect_den <= 0)) {
goto render_and_return;
}
/* XXX: do we really use rect here, not window_rect? */
double width = con->rect.width - base_width;
double height = con->rect.height - base_height;
/* Convert numerator/denominator to a double */
double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
DLOG("width = %f, height = %f\n", width, height);
/* Sanity checks, this is user-input, in a way */
if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
goto render_and_return;
/* Check if we need to set proportional_* variables using the correct ratio */
double aspect_ratio = 0.0;
if ((width / height) < min_aspect) {
aspect_ratio = min_aspect;
} else if ((width / height) > max_aspect) {
aspect_ratio = max_aspect;
} else
goto render_and_return;
if (fabs(con->window->aspect_ratio - aspect_ratio) > DBL_EPSILON) {
con->window->aspect_ratio = aspect_ratio;
changed = true;
}
render_and_return:
if (changed)
tree_render();
FREE(reply);
return true;
}
/*
* Handles the WM_HINTS property for extracting the urgency state of the window.
*
*/
static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
xcb_atom_t name, xcb_get_property_reply_t *reply) {
Con *con = con_by_window_id(window);
if (con == NULL) {
DLOG("Received WM_HINTS for unknown client\n");
return false;
}
bool urgency_hint;
if (reply == NULL)
reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL);
window_update_hints(con->window, reply, &urgency_hint);
con_set_urgency(con, urgency_hint);
tree_render();
return true;
}
/*
* Handles the transient for hints set by a window, signalizing that this window is a popup window
* for some other window.
*
* See ICCCM 4.1.2.6 for more details
*
*/
static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
xcb_atom_t name, xcb_get_property_reply_t *prop) {
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
DLOG("No such window\n");
return false;
}
if (prop == NULL) {
prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32),
NULL);
if (prop == NULL)
return false;
}
window_update_transient_for(con->window, prop);
return true;
}
/*
* Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
* toolwindow (or similar) and to which window it belongs (logical parent).
*
*/
static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
xcb_atom_t name, xcb_get_property_reply_t *prop) {
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
return false;
if (prop == NULL) {
prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32),
NULL);
if (prop == NULL)
return false;
}
window_update_leader(con->window, prop);
return true;
}
/*
* Handles FocusIn events which are generated by clients (i3’s focus changes
* don’t generate FocusIn events due to a different EventMask) and updates the
* decorations accordingly.
*
*/
static void handle_focus_in(xcb_focus_in_event_t *event) {
DLOG("focus change in, for window 0x%08x\n", event->event);
Con *con;
if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
return;
DLOG("That is con %p / %s\n", con, con->name);
if (event->mode == XCB_NOTIFY_MODE_GRAB ||
event->mode == XCB_NOTIFY_MODE_UNGRAB) {
DLOG("FocusIn event for grab/ungrab, ignoring\n");
return;
}
if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
DLOG("notify detail is pointer, ignoring this event\n");
return;
}
if (focused_id == event->event) {
DLOG("focus matches the currently focused window, not doing anything\n");
return;
}
/* Skip dock clients, they cannot get the i3 focus. */
if (con->parent->type == CT_DOCKAREA) {
DLOG("This is a dock client, not focusing.\n");
return;
}
DLOG("focus is different, updating decorations\n");
/* Get the currently focused workspace to check if the focus change also
* involves changing workspaces. If so, we need to call workspace_show() to
* correctly update state and send the IPC event. */
Con *ws = con_get_workspace(con);
if (ws != con_get_workspace(focused))
workspace_show(ws);
con_focus(con);
/* We update focused_id because we don’t need to set focus again */
focused_id = event->event;
x_push_changes(croot);
return;
}
/*
* Handles the WM_CLASS property for assignments and criteria selection.
*
*/
static bool handle_class_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
xcb_atom_t name, xcb_get_property_reply_t *prop) {
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
return false;
if (prop == NULL) {
prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
false, window, XCB_ATOM_WM_CLASS, XCB_ATOM_STRING, 0, 32),
NULL);
if (prop == NULL)
return false;
}
window_update_class(con->window, prop, false);
return true;
}
/*
* Handles the _NET_WM_STRUT_PARTIAL property for allocating space for dock clients.
*
*/
static bool handle_strut_partial_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
xcb_atom_t name, xcb_get_property_reply_t *prop) {
DLOG("strut partial change for window 0x%08x\n", window);
Con *con;
if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
return false;
}
if (prop == NULL) {
xcb_generic_error_t *err = NULL;
xcb_get_property_cookie_t strut_cookie = xcb_get_property(conn, false, window, A__NET_WM_STRUT_PARTIAL,
XCB_GET_PROPERTY_TYPE_ANY, 0, UINT32_MAX);
prop = xcb_get_property_reply(conn, strut_cookie, &err);
if (err != NULL) {
DLOG("got error when getting strut partial property: %d\n", err->error_code);
free(err);
return false;
}
if (prop == NULL) {
return false;
}
}
DLOG("That is con %p / %s\n", con, con->name);
window_update_strut_partial(con->window, prop);
/* we only handle this change for dock clients */
if (con->parent == NULL || con->parent->type != CT_DOCKAREA) {
return true;
}
Con *search_at = croot;
Con *output = con_get_output(con);
if (output != NULL) {
DLOG("Starting search at output %s\n", output->name);
search_at = output;
}
/* find out the desired position of this dock window */
if (con->window->reserved.top > 0 && con->window->reserved.bottom == 0) {
DLOG("Top dock client\n");
con->window->dock = W_DOCK_TOP;
} else if (con->window->reserved.top == 0 && con->window->reserved.bottom > 0) {
DLOG("Bottom dock client\n");
con->window->dock = W_DOCK_BOTTOM;
} else {
DLOG("Ignoring invalid reserved edges (_NET_WM_STRUT_PARTIAL), using position as fallback:\n");
if (con->geometry.y < (search_at->rect.height / 2)) {
DLOG("geom->y = %d < rect.height / 2 = %d, it is a top dock client\n",
con->geometry.y, (search_at->rect.height / 2));
con->window->dock = W_DOCK_TOP;
} else {
DLOG("geom->y = %d >= rect.height / 2 = %d, it is a bottom dock client\n",
con->geometry.y, (search_at->rect.height / 2));
con->window->dock = W_DOCK_BOTTOM;
}
}
/* find the dockarea */
Con *dockarea = con_for_window(search_at, con->window, NULL);
assert(dockarea != NULL);
/* attach the dock to the dock area */
con_detach(con);
con->parent = dockarea;
TAILQ_INSERT_HEAD(&(dockarea->focus_head), con, focused);
TAILQ_INSERT_HEAD(&(dockarea->nodes_head), con, nodes);
tree_render();
return true;
}
/* Returns false if the event could not be processed (e.g. the window could not
* be found), true otherwise */
typedef bool (*cb_property_handler_t)(void *data, xcb_connection_t *c, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *property);
struct property_handler_t {
xcb_atom_t atom;
uint32_t long_len;
cb_property_handler_t cb;
};
static struct property_handler_t property_handlers[] = {
{0, 128, handle_windowname_change},
{0, UINT_MAX, handle_hints},
{0, 128, handle_windowname_change_legacy},
{0, UINT_MAX, handle_normal_hints},
{0, UINT_MAX, handle_clientleader_change},
{0, UINT_MAX, handle_transient_for},
{0, 128, handle_windowrole_change},
{0, 128, handle_class_change},
{0, UINT_MAX, handle_strut_partial_change},
{0, UINT_MAX, handle_window_type}};
#define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
/*
* Sets the appropriate atoms for the property handlers after the atoms were
* received from X11
*
*/
void property_handlers_init(void) {
sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
property_handlers[0].atom = A__NET_WM_NAME;
property_handlers[1].atom = XCB_ATOM_WM_HINTS;
property_handlers[2].atom = XCB_ATOM_WM_NAME;
property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
property_handlers[4].atom = A_WM_CLIENT_LEADER;
property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
property_handlers[6].atom = A_WM_WINDOW_ROLE;
property_handlers[7].atom = XCB_ATOM_WM_CLASS;
property_handlers[8].atom = A__NET_WM_STRUT_PARTIAL;
property_handlers[9].atom = A__NET_WM_WINDOW_TYPE;
}
static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
struct property_handler_t *handler = NULL;
xcb_get_property_reply_t *propr = NULL;
for (size_t c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
if (property_handlers[c].atom != atom)
continue;
handler = &property_handlers[c];
break;
}
if (handler == NULL) {
//DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
return;
}
if (state != XCB_PROPERTY_DELETE) {
xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
propr = xcb_get_property_reply(conn, cookie, 0);
}
/* the handler will free() the reply unless it returns false */
if (!handler->cb(NULL, conn, state, window, atom, propr))
FREE(propr);
}
/*
* Takes an xcb_generic_event_t and calls the appropriate handler, based on the
* event type.
*
*/
void handle_event(int type, xcb_generic_event_t *event) {
if (type != XCB_MOTION_NOTIFY)
DLOG("event type %d, xkb_base %d\n", type, xkb_base);
if (randr_base > -1 &&
type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
handle_screen_change(event);
return;
}
if (xkb_base > -1 && type == xkb_base) {
DLOG("xkb event, need to handle it.\n");
xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
if (state->xkbType == XCB_XKB_NEW_KEYBOARD_NOTIFY) {
DLOG("xkb new keyboard notify, sequence %d, time %d\n", state->sequence, state->time);
xcb_key_symbols_free(keysyms);
keysyms = xcb_key_symbols_alloc(conn);
if (((xcb_xkb_new_keyboard_notify_event_t *)event)->changed & XCB_XKB_NKN_DETAIL_KEYCODES)
(void)load_keymap();
ungrab_all_keys(conn);
translate_keysyms();
grab_all_keys(conn);
} else if (state->xkbType == XCB_XKB_MAP_NOTIFY) {
if (event_is_ignored(event->sequence, type)) {
DLOG("Ignoring map notify event for sequence %d.\n", state->sequence);
} else {
DLOG("xkb map notify, sequence %d, time %d\n", state->sequence, state->time);
add_ignore_event(event->sequence, type);
xcb_key_symbols_free(keysyms);
keysyms = xcb_key_symbols_alloc(conn);
ungrab_all_keys(conn);
translate_keysyms();
grab_all_keys(conn);
(void)load_keymap();
}
} else if (state->xkbType == XCB_XKB_STATE_NOTIFY) {
DLOG("xkb state group = %d\n", state->group);
if (xkb_current_group == state->group)
return;
xkb_current_group = state->group;
ungrab_all_keys(conn);
grab_all_keys(conn);
}
return;
}
switch (type) {
case XCB_KEY_PRESS:
case XCB_KEY_RELEASE:
handle_key_press((xcb_key_press_event_t *)event);
break;
case XCB_BUTTON_PRESS:
case XCB_BUTTON_RELEASE:
handle_button_press((xcb_button_press_event_t *)event);
break;
case XCB_MAP_REQUEST:
handle_map_request((xcb_map_request_event_t *)event);
break;
case XCB_UNMAP_NOTIFY:
handle_unmap_notify_event((xcb_unmap_notify_event_t *)event);
break;
case XCB_DESTROY_NOTIFY:
handle_destroy_notify_event((xcb_destroy_notify_event_t *)event);
break;
case XCB_EXPOSE:
handle_expose_event((xcb_expose_event_t *)event);
break;
case XCB_MOTION_NOTIFY:
handle_motion_notify((xcb_motion_notify_event_t *)event);
break;
/* Enter window = user moved their mouse over the window */
case XCB_ENTER_NOTIFY:
handle_enter_notify((xcb_enter_notify_event_t *)event);
break;
/* Client message are sent to the root window. The only interesting
* client message for us is _NET_WM_STATE, we honour
* _NET_WM_STATE_FULLSCREEN and _NET_WM_STATE_DEMANDS_ATTENTION */
case XCB_CLIENT_MESSAGE:
handle_client_message((xcb_client_message_event_t *)event);
break;
/* Configure request = window tried to change size on its own */
case XCB_CONFIGURE_REQUEST:
handle_configure_request((xcb_configure_request_event_t *)event);
break;
/* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
case XCB_MAPPING_NOTIFY:
handle_mapping_notify((xcb_mapping_notify_event_t *)event);
break;
case XCB_FOCUS_IN:
handle_focus_in((xcb_focus_in_event_t *)event);
break;
case XCB_PROPERTY_NOTIFY: {
xcb_property_notify_event_t *e = (xcb_property_notify_event_t *)event;
last_timestamp = e->time;
property_notify(e->state, e->window, e->atom);
break;
}
default:
//DLOG("Unhandled event of type %d\n", type);
break;
}
}
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