+
+/*
+ * 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
+}