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gri3-wm/src/window.c

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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
* window.c: Updates window attributes (X11 hints/properties).
*
*/
#include "all.h"
#include <math.h>
/*
* Frees an i3Window and all its members.
*
*/
void window_free(i3Window *win) {
FREE(win->class_class);
FREE(win->class_instance);
i3string_free(win->name);
FREE(win->ran_assignments);
FREE(win);
}
/*
* Updates the WM_CLASS (consisting of the class and instance) for the
* given window.
*
*/
void window_update_class(i3Window *win, xcb_get_property_reply_t *prop) {
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("WM_CLASS not set.\n");
FREE(prop);
return;
}
/* We cannot use asprintf here since this property contains two
* null-terminated strings (for compatibility reasons). Instead, we
* use strdup() on both strings */
const size_t prop_length = xcb_get_property_value_length(prop);
char *new_class = xcb_get_property_value(prop);
const size_t class_class_index = strnlen(new_class, prop_length) + 1;
FREE(win->class_instance);
FREE(win->class_class);
win->class_instance = sstrndup(new_class, prop_length);
if (class_class_index < prop_length)
win->class_class = sstrndup(new_class + class_class_index, prop_length - class_class_index);
else
win->class_class = NULL;
LOG("WM_CLASS changed to %s (instance), %s (class)\n",
win->class_instance, win->class_class);
free(prop);
}
/*
* Updates the name by using _NET_WM_NAME (encoded in UTF-8) for the given
* window. Further updates using window_update_name_legacy will be ignored.
*
*/
void window_update_name(i3Window *win, xcb_get_property_reply_t *prop) {
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("_NET_WM_NAME not specified, not changing\n");
FREE(prop);
return;
}
i3string_free(win->name);
/* Truncate the name at the first zero byte. See #3515. */
const int len = xcb_get_property_value_length(prop);
char *name = sstrndup(xcb_get_property_value(prop), len);
win->name = i3string_from_utf8(name);
free(name);
Con *con = con_by_window_id(win->id);
if (con != NULL && con->title_format != NULL) {
i3String *name = con_parse_title_format(con);
ewmh_update_visible_name(win->id, i3string_as_utf8(name));
I3STRING_FREE(name);
}
win->name_x_changed = true;
LOG("_NET_WM_NAME changed to \"%s\"\n", i3string_as_utf8(win->name));
win->uses_net_wm_name = true;
free(prop);
}
/*
* Updates the name by using WM_NAME (encoded in COMPOUND_TEXT). We do not
* touch what the client sends us but pass it to xcb_image_text_8. To get
* proper unicode rendering, the application has to use _NET_WM_NAME (see
* window_update_name()).
*
*/
void window_update_name_legacy(i3Window *win, xcb_get_property_reply_t *prop) {
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("WM_NAME not set (_NET_WM_NAME is what you want anyways).\n");
FREE(prop);
return;
}
/* ignore update when the window is known to already have a UTF-8 name */
if (win->uses_net_wm_name) {
free(prop);
return;
}
i3string_free(win->name);
const int len = xcb_get_property_value_length(prop);
char *name = sstrndup(xcb_get_property_value(prop), len);
win->name = i3string_from_utf8(name);
free(name);
Con *con = con_by_window_id(win->id);
if (con != NULL && con->title_format != NULL) {
i3String *name = con_parse_title_format(con);
ewmh_update_visible_name(win->id, i3string_as_utf8(name));
I3STRING_FREE(name);
}
LOG("WM_NAME changed to \"%s\"\n", i3string_as_utf8(win->name));
LOG("Using legacy window title. Note that in order to get Unicode window "
"titles in i3, the application has to set _NET_WM_NAME (UTF-8)\n");
win->name_x_changed = true;
free(prop);
}
/*
* Updates the CLIENT_LEADER (logical parent window).
*
*/
void window_update_leader(i3Window *win, xcb_get_property_reply_t *prop) {
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("CLIENT_LEADER not set on window 0x%08x.\n", win->id);
win->leader = XCB_NONE;
FREE(prop);
return;
}
xcb_window_t *leader = xcb_get_property_value(prop);
if (leader == NULL) {
free(prop);
return;
}
DLOG("Client leader changed to %08x\n", *leader);
win->leader = *leader;
free(prop);
}
/*
* Updates the TRANSIENT_FOR (logical parent window).
*
*/
void window_update_transient_for(i3Window *win, xcb_get_property_reply_t *prop) {
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("TRANSIENT_FOR not set on window 0x%08x.\n", win->id);
win->transient_for = XCB_NONE;
FREE(prop);
return;
}
xcb_window_t transient_for;
if (!xcb_icccm_get_wm_transient_for_from_reply(&transient_for, prop)) {
free(prop);
return;
}
DLOG("Transient for changed to 0x%08x (window 0x%08x)\n", transient_for, win->id);
win->transient_for = transient_for;
free(prop);
}
/*
* Updates the _NET_WM_STRUT_PARTIAL (reserved pixels at the screen edges)
*
*/
void window_update_strut_partial(i3Window *win, xcb_get_property_reply_t *prop) {
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("_NET_WM_STRUT_PARTIAL not set.\n");
FREE(prop);
return;
}
uint32_t *strut;
if (!(strut = xcb_get_property_value(prop))) {
free(prop);
return;
}
DLOG("Reserved pixels changed to: left = %d, right = %d, top = %d, bottom = %d\n",
strut[0], strut[1], strut[2], strut[3]);
win->reserved = (struct reservedpx){strut[0], strut[1], strut[2], strut[3]};
free(prop);
}
/*
* Updates the WM_WINDOW_ROLE
*
*/
void window_update_role(i3Window *win, xcb_get_property_reply_t *prop) {
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("WM_WINDOW_ROLE not set.\n");
FREE(prop);
return;
}
char *new_role;
sasprintf(&new_role, "%.*s", xcb_get_property_value_length(prop),
(char *)xcb_get_property_value(prop));
FREE(win->role);
win->role = new_role;
LOG("WM_WINDOW_ROLE changed to \"%s\"\n", win->role);
free(prop);
}
/*
* Updates the _NET_WM_WINDOW_TYPE property.
*
*/
void window_update_type(i3Window *window, xcb_get_property_reply_t *reply) {
xcb_atom_t new_type = xcb_get_preferred_window_type(reply);
free(reply);
if (new_type == XCB_NONE) {
DLOG("cannot read _NET_WM_WINDOW_TYPE from window.\n");
return;
}
window->window_type = new_type;
LOG("_NET_WM_WINDOW_TYPE changed to %i.\n", window->window_type);
run_assignments(window);
}
/*
* Updates the WM_NORMAL_HINTS
*
*/
bool window_update_normal_hints(i3Window *win, xcb_get_property_reply_t *reply, xcb_get_geometry_reply_t *geom) {
bool changed = false;
xcb_size_hints_t size_hints;
/* If the hints were already in this event, use them, if not, request them */
bool success;
if (reply != NULL) {
success = xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
} else {
success = xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, win->id), &size_hints, NULL);
}
if (!success) {
DLOG("Could not get WM_NORMAL_HINTS\n");
return false;
}
#define ASSIGN_IF_CHANGED(original, new) \
do { \
if (original != new) { \
original = new; \
changed = true; \
} \
} while (0)
if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
ASSIGN_IF_CHANGED(win->min_width, size_hints.min_width);
ASSIGN_IF_CHANGED(win->min_height, size_hints.min_height);
}
if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MAX_SIZE)) {
DLOG("Maximum size: %d (width) x %d (height)\n", size_hints.max_width, size_hints.max_height);
int max_width = max(0, size_hints.max_width);
int max_height = max(0, size_hints.max_height);
ASSIGN_IF_CHANGED(win->max_width, max_width);
ASSIGN_IF_CHANGED(win->max_height, max_height);
} else {
DLOG("Clearing maximum size\n");
ASSIGN_IF_CHANGED(win->max_width, 0);
ASSIGN_IF_CHANGED(win->max_height, 0);
}
if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
DLOG("Size increments: %d (width) x %d (height)\n", size_hints.width_inc, size_hints.height_inc);
if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF) {
ASSIGN_IF_CHANGED(win->width_increment, size_hints.width_inc);
} else {
ASSIGN_IF_CHANGED(win->width_increment, 0);
}
if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF) {
ASSIGN_IF_CHANGED(win->height_increment, size_hints.height_inc);
} else {
ASSIGN_IF_CHANGED(win->height_increment, 0);
}
} else {
DLOG("Clearing size increments\n");
ASSIGN_IF_CHANGED(win->width_increment, 0);
ASSIGN_IF_CHANGED(win->height_increment, 0);
}
/* The base width / height is the desired size of the window. */
if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE &&
(win->base_width >= 0) && (win->base_height >= 0)) {
DLOG("Base size: %d (width) x %d (height)\n", size_hints.base_width, size_hints.base_height);
ASSIGN_IF_CHANGED(win->base_width, size_hints.base_width);
ASSIGN_IF_CHANGED(win->base_height, size_hints.base_height);
} else {
DLOG("Clearing base size\n");
ASSIGN_IF_CHANGED(win->base_width, 0);
ASSIGN_IF_CHANGED(win->base_height, 0);
}
if (geom != NULL &&
(size_hints.flags & XCB_ICCCM_SIZE_HINT_US_POSITION || size_hints.flags & XCB_ICCCM_SIZE_HINT_P_POSITION) &&
(size_hints.flags & XCB_ICCCM_SIZE_HINT_US_SIZE || size_hints.flags & XCB_ICCCM_SIZE_HINT_P_SIZE)) {
DLOG("Setting geometry x=%d y=%d w=%d h=%d\n", size_hints.x, size_hints.y, size_hints.width, size_hints.height);
geom->x = size_hints.x;
geom->y = size_hints.y;
geom->width = size_hints.width;
geom->height = size_hints.height;
}
/* 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) &&
(size_hints.max_aspect_num >= 0) && (size_hints.max_aspect_den > 0)) {
/* 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.max_aspect_den;
DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
if (fabs(win->min_aspect_ratio - min_aspect) > DBL_EPSILON) {
win->min_aspect_ratio = min_aspect;
changed = true;
}
if (fabs(win->max_aspect_ratio - max_aspect) > DBL_EPSILON) {
win->max_aspect_ratio = max_aspect;
changed = true;
}
} else {
DLOG("Clearing aspect ratios\n");
ASSIGN_IF_CHANGED(win->min_aspect_ratio, 0.0);
ASSIGN_IF_CHANGED(win->max_aspect_ratio, 0.0);
}
return changed;
}
/*
* Updates the WM_HINTS (we only care about the input focus handling part).
*
*/
void window_update_hints(i3Window *win, xcb_get_property_reply_t *prop, bool *urgency_hint) {
if (urgency_hint != NULL)
*urgency_hint = false;
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("WM_HINTS not set.\n");
FREE(prop);
return;
}
xcb_icccm_wm_hints_t hints;
if (!xcb_icccm_get_wm_hints_from_reply(&hints, prop)) {
DLOG("Could not get WM_HINTS\n");
free(prop);
return;
}
if (hints.flags & XCB_ICCCM_WM_HINT_INPUT) {
win->doesnt_accept_focus = !hints.input;
LOG("WM_HINTS.input changed to \"%d\"\n", hints.input);
}
if (urgency_hint != NULL)
*urgency_hint = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
free(prop);
}
/*
* Updates the MOTIF_WM_HINTS. The container's border style should be set to
* `motif_border_style' if border style is not BS_NORMAL.
*
* i3 only uses this hint when it specifies a window should have no
* title bar, or no decorations at all, which is how most window managers
* handle it.
*
* The EWMH spec intended to replace Motif hints with _NET_WM_WINDOW_TYPE, but
* it is still in use by popular widget toolkits such as GTK+ and Java AWT.
*
*/
void window_update_motif_hints(i3Window *win, xcb_get_property_reply_t *prop, border_style_t *motif_border_style) {
/* This implementation simply mirrors Gnome's Metacity. Official
* documentation of this hint is nowhere to be found.
* For more information see:
* https://people.gnome.org/~tthurman/docs/metacity/xprops_8h-source.html
* https://stackoverflow.com/questions/13787553/detect-if-a-x11-window-has-decorations
*/
#define MWM_HINTS_FLAGS_FIELD 0
#define MWM_HINTS_DECORATIONS_FIELD 2
#define MWM_HINTS_DECORATIONS (1 << 1)
#define MWM_DECOR_ALL (1 << 0)
#define MWM_DECOR_BORDER (1 << 1)
#define MWM_DECOR_TITLE (1 << 3)
if (motif_border_style != NULL)
*motif_border_style = BS_NORMAL;
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
FREE(prop);
return;
}
/* The property consists of an array of 5 uint32_t's. The first value is a
* bit mask of what properties the hint will specify. We are only interested
* in MWM_HINTS_DECORATIONS because it indicates that the third value of the
* array tells us which decorations the window should have, each flag being
* a particular decoration. Notice that X11 (Xlib) often mentions 32-bit
* fields which in reality are implemented using unsigned long variables
* (64-bits long on amd64 for example). On the other hand,
* xcb_get_property_value() behaves strictly according to documentation,
* i.e. returns 32-bit data fields. */
uint32_t *motif_hints = (uint32_t *)xcb_get_property_value(prop);
if (motif_border_style != NULL &&
motif_hints[MWM_HINTS_FLAGS_FIELD] & MWM_HINTS_DECORATIONS) {
if (motif_hints[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_ALL ||
motif_hints[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_TITLE)
*motif_border_style = BS_NORMAL;
else if (motif_hints[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_BORDER)
*motif_border_style = BS_PIXEL;
else
*motif_border_style = BS_NONE;
}
FREE(prop);
#undef MWM_HINTS_FLAGS_FIELD
#undef MWM_HINTS_DECORATIONS_FIELD
#undef MWM_HINTS_DECORATIONS
#undef MWM_DECOR_ALL
#undef MWM_DECOR_BORDER
#undef MWM_DECOR_TITLE
}
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