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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <drm_fourcc.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <wayland-server-core.h>
#include <wlr/types/wlr_output_layout.h>
#include "cairo_util.h"
#include "pango.h"
#include "sway/config.h"
#include "sway/desktop.h"
#include "sway/desktop/transaction.h"
#include "sway/input/input-manager.h"
#include "sway/input/seat.h"
#include "sway/ipc-server.h"
#include "sway/output.h"
#include "sway/server.h"
#include "sway/tree/arrange.h"
#include "sway/tree/view.h"
#include "sway/tree/workspace.h"
#include "sway/xdg_decoration.h"
#include "list.h"
#include "log.h"
#include "stringop.h"
struct sway_container *container_create(struct sway_view *view) {
struct sway_container *c = calloc(1, sizeof(struct sway_container));
if (!c) {
sway_log(SWAY_ERROR, "Unable to allocate sway_container");
return NULL;
}
node_init(&c->node, N_CONTAINER, c);
c->pending.layout = L_NONE;
c->view = view;
c->alpha = 1.0f;
if (!view) {
c->pending.children = create_list();
c->current.children = create_list();
}
c->marks = create_list();
c->outputs = create_list();
wl_signal_init(&c->events.destroy);
wl_signal_emit(&root->events.new_node, &c->node);
return c;
}
void container_destroy(struct sway_container *con) {
if (!sway_assert(con->node.destroying,
"Tried to free container which wasn't marked as destroying")) {
return;
}
if (!sway_assert(con->node.ntxnrefs == 0, "Tried to free container "
"which is still referenced by transactions")) {
return;
}
free(con->title);
free(con->formatted_title);
wlr_texture_destroy(con->title_focused);
wlr_texture_destroy(con->title_focused_inactive);
wlr_texture_destroy(con->title_unfocused);
wlr_texture_destroy(con->title_urgent);
list_free(con->pending.children);
list_free(con->current.children);
list_free(con->outputs);
list_free_items_and_destroy(con->marks);
wlr_texture_destroy(con->marks_focused);
wlr_texture_destroy(con->marks_focused_inactive);
wlr_texture_destroy(con->marks_unfocused);
wlr_texture_destroy(con->marks_urgent);
if (con->view) {
if (con->view->container == con) {
con->view->container = NULL;
}
if (con->view->destroying) {
view_destroy(con->view);
}
}
free(con);
}
void container_begin_destroy(struct sway_container *con) {
if (con->view) {
ipc_event_window(con, "close");
}
// The workspace must have the fullscreen pointer cleared so that the
// seat code can find an appropriate new focus.
if (con->pending.fullscreen_mode == FULLSCREEN_WORKSPACE && con->pending.workspace) {
con->pending.workspace->fullscreen = NULL;
}
if (con->scratchpad && con->pending.fullscreen_mode == FULLSCREEN_GLOBAL) {
container_fullscreen_disable(con);
}
wl_signal_emit(&con->node.events.destroy, &con->node);
container_end_mouse_operation(con);
con->node.destroying = true;
node_set_dirty(&con->node);
if (con->scratchpad) {
root_scratchpad_remove_container(con);
}
if (con->pending.fullscreen_mode == FULLSCREEN_GLOBAL) {
container_fullscreen_disable(con);
}
if (con->pending.parent || con->pending.workspace) {
container_detach(con);
}
}
void container_reap_empty(struct sway_container *con) {
if (con->view) {
return;
}
struct sway_workspace *ws = con->pending.workspace;
while (con) {
if (con->pending.children->length) {
return;
}
struct sway_container *parent = con->pending.parent;
container_begin_destroy(con);
con = parent;
}
if (ws) {
workspace_consider_destroy(ws);
}
}
struct sway_container *container_flatten(struct sway_container *container) {
if (container->view) {
return NULL;
}
while (container && container->pending.children->length == 1) {
struct sway_container *child = container->pending.children->items[0];
struct sway_container *parent = container->pending.parent;
container_replace(container, child);
container_begin_destroy(container);
container = parent;
}
return container;
}
struct sway_container *container_find_child(struct sway_container *container,
bool (*test)(struct sway_container *con, void *data), void *data) {
if (!container->pending.children) {
return NULL;
}
for (int i = 0; i < container->pending.children->length; ++i) {
struct sway_container *child = container->pending.children->items[i];
if (test(child, data)) {
return child;
}
struct sway_container *res = container_find_child(child, test, data);
if (res) {
return res;
}
}
return NULL;
}
static struct sway_container *surface_at_view(struct sway_container *con, double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
if (!sway_assert(con->view, "Expected a view")) {
return NULL;
}
struct sway_view *view = con->view;
double view_sx = lx - con->surface_x + view->geometry.x;
double view_sy = ly - con->surface_y + view->geometry.y;
double _sx, _sy;
struct wlr_surface *_surface = NULL;
switch (view->type) {
#if HAVE_XWAYLAND
case SWAY_VIEW_XWAYLAND:
_surface = wlr_surface_surface_at(view->surface,
view_sx, view_sy, &_sx, &_sy);
break;
#endif
case SWAY_VIEW_XDG_SHELL:
_surface = wlr_xdg_surface_surface_at(
view->wlr_xdg_surface,
view_sx, view_sy, &_sx, &_sy);
break;
}
if (_surface) {
*sx = _sx;
*sy = _sy;
*surface = _surface;
return con;
}
return NULL;
}
/**
* container_at for a container with layout L_TABBED.
*/
static struct sway_container *container_at_tabbed(struct sway_node *parent,
double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
struct wlr_box box;
node_get_box(parent, &box);
if (lx < box.x || lx > box.x + box.width ||
ly < box.y || ly > box.y + box.height) {
return NULL;
}
struct sway_seat *seat = input_manager_current_seat();
list_t *children = node_get_children(parent);
if (!children->length) {
return NULL;
}
// Tab titles
int title_height = container_titlebar_height();
if (ly < box.y + title_height) {
int tab_width = box.width / children->length;
int child_index = (lx - box.x) / tab_width;
if (child_index >= children->length) {
child_index = children->length - 1;
}
struct sway_container *child = children->items[child_index];
return child;
}
// Surfaces
struct sway_node *current = seat_get_active_tiling_child(seat, parent);
return current ? tiling_container_at(current, lx, ly, surface, sx, sy) : NULL;
}
/**
* container_at for a container with layout L_STACKED.
*/
static struct sway_container *container_at_stacked(struct sway_node *parent,
double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
struct wlr_box box;
node_get_box(parent, &box);
if (lx < box.x || lx > box.x + box.width ||
ly < box.y || ly > box.y + box.height) {
return NULL;
}
struct sway_seat *seat = input_manager_current_seat();
list_t *children = node_get_children(parent);
// Title bars
int title_height = container_titlebar_height();
if (title_height > 0) {
int child_index = (ly - box.y) / title_height;
if (child_index < children->length) {
struct sway_container *child = children->items[child_index];
return child;
}
}
// Surfaces
struct sway_node *current = seat_get_active_tiling_child(seat, parent);
return current ? tiling_container_at(current, lx, ly, surface, sx, sy) : NULL;
}
/**
* container_at for a container with layout L_HORIZ or L_VERT.
*/
static struct sway_container *container_at_linear(struct sway_node *parent,
double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
list_t *children = node_get_children(parent);
for (int i = 0; i < children->length; ++i) {
struct sway_container *child = children->items[i];
struct sway_container *container =
tiling_container_at(&child->node, lx, ly, surface, sx, sy);
if (container) {
return container;
}
}
return NULL;
}
static struct sway_container *floating_container_at(double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
// For outputs with floating containers that overhang the output bounds,
// those at the end of the output list appear on top of floating
// containers from other outputs, so iterate the list in reverse.
for (int i = root->outputs->length - 1; i >= 0; --i) {
struct sway_output *output = root->outputs->items[i];
for (int j = 0; j < output->workspaces->length; ++j) {
struct sway_workspace *ws = output->workspaces->items[j];
if (!workspace_is_visible(ws)) {
continue;
}
// Items at the end of the list are on top, so iterate the list in
// reverse.
for (int k = ws->floating->length - 1; k >= 0; --k) {
struct sway_container *floater = ws->floating->items[k];
struct sway_container *container =
tiling_container_at(&floater->node, lx, ly, surface, sx, sy);
if (container) {
return container;
}
}
}
}
return NULL;
}
static struct sway_container *view_container_content_at(struct sway_node *parent,
double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
if (!sway_assert(node_is_view(parent), "Expected a view")) {
return NULL;
}
struct sway_container *container = parent->sway_container;
struct wlr_box box = {
.x = container->pending.content_x,
.y = container->pending.content_y,
.width = container->pending.content_width,
.height = container->pending.content_height,
};
if (wlr_box_contains_point(&box, lx, ly)) {
surface_at_view(parent->sway_container, lx, ly, surface, sx, sy);
return container;
}
return NULL;
}
static struct sway_container *view_container_at(struct sway_node *parent,
double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
if (!sway_assert(node_is_view(parent), "Expected a view")) {
return NULL;
}
struct sway_container *container = parent->sway_container;
struct wlr_box box = {
.x = container->pending.x,
.y = container->pending.y,
.width = container->pending.width,
.height = container->pending.height,
};
if (wlr_box_contains_point(&box, lx, ly)) {
surface_at_view(parent->sway_container, lx, ly, surface, sx, sy);
return container;
}
return NULL;
}
struct sway_container *tiling_container_at(struct sway_node *parent,
double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
if (node_is_view(parent)) {
return view_container_at(parent, lx, ly, surface, sx, sy);
}
if (!node_get_children(parent)) {
return NULL;
}
switch (node_get_layout(parent)) {
case L_HORIZ:
case L_VERT:
return container_at_linear(parent, lx, ly, surface, sx, sy);
case L_TABBED:
return container_at_tabbed(parent, lx, ly, surface, sx, sy);
case L_STACKED:
return container_at_stacked(parent, lx, ly, surface, sx, sy);
case L_NONE:
return NULL;
}
return NULL;
}
static bool surface_is_popup(struct wlr_surface *surface) {
if (wlr_surface_is_xdg_surface(surface)) {
struct wlr_xdg_surface *xdg_surface =
wlr_xdg_surface_from_wlr_surface(surface);
while (xdg_surface && xdg_surface->role != WLR_XDG_SURFACE_ROLE_NONE) {
if (xdg_surface->role == WLR_XDG_SURFACE_ROLE_POPUP) {
return true;
}
xdg_surface = xdg_surface->toplevel->parent;
}
return false;
}
return false;
}
struct sway_container *container_at(struct sway_workspace *workspace,
double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
struct sway_container *c;
struct sway_seat *seat = input_manager_current_seat();
struct sway_container *focus = seat_get_focused_container(seat);
bool is_floating = focus && container_is_floating_or_child(focus);
// Focused view's popups
if (focus && focus->view) {
c = surface_at_view(focus, lx, ly, surface, sx, sy);
if (c && surface_is_popup(*surface)) {
return c;
}
*surface = NULL;
}
// Floating
if ((c = floating_container_at(lx, ly, surface ,sx ,sy))) {
return c;
}
// Tiling (focused)
if (focus && focus->view && !is_floating) {
if ((c = view_container_content_at(&focus->node, lx, ly, surface, sx, sy))) {
return c;
}
}
// Tiling (non-focused)
if ((c = tiling_container_at(&workspace->node, lx, ly, surface, sx, sy))) {
return c;
}
return NULL;
}
void container_for_each_child(struct sway_container *container,
void (*f)(struct sway_container *container, void *data),
void *data) {
if (container->pending.children) {
for (int i = 0; i < container->pending.children->length; ++i) {
struct sway_container *child = container->pending.children->items[i];
f(child, data);
container_for_each_child(child, f, data);
}
}
}
struct sway_container *container_obstructing_fullscreen_container(struct sway_container *container)
{
struct sway_workspace *workspace = container->pending.workspace;
if (workspace && workspace->fullscreen && !container_is_fullscreen_or_child(container)) {
if (container_is_transient_for(container, workspace->fullscreen)) {
return NULL;
}
return workspace->fullscreen;
}
struct sway_container *fullscreen_global = root->fullscreen_global;
if (fullscreen_global && container != fullscreen_global && !container_has_ancestor(container, fullscreen_global)) {
if (container_is_transient_for(container, fullscreen_global)) {
return NULL;
}
return fullscreen_global;
}
return NULL;
}
bool container_has_ancestor(struct sway_container *descendant,
struct sway_container *ancestor) {
while (descendant) {
descendant = descendant->pending.parent;
if (descendant == ancestor) {
return true;
}
}
return false;
}
void container_damage_whole(struct sway_container *container) {
for (int i = 0; i < root->outputs->length; ++i) {
struct sway_output *output = root->outputs->items[i];
output_damage_whole_container(output, container);
}
}
/**
* Return the output which will be used for scale purposes.
* This is the most recently entered output.
*/
struct sway_output *container_get_effective_output(struct sway_container *con) {
if (con->outputs->length == 0) {
return NULL;
}
return con->outputs->items[con->outputs->length - 1];
}
static void render_titlebar_text_texture(struct sway_output *output,
struct sway_container *con, struct wlr_texture **texture,
struct border_colors *class, bool pango_markup, char *text) {
double scale = output->wlr_output->scale;
int width = 0;
int height = config->font_height * scale;
int baseline;
// We must use a non-nil cairo_t for cairo_set_font_options to work.
// Therefore, we cannot use cairo_create(NULL).
cairo_surface_t *dummy_surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, 0, 0);
cairo_t *c = cairo_create(dummy_surface);
cairo_set_antialias(c, CAIRO_ANTIALIAS_BEST);
cairo_font_options_t *fo = cairo_font_options_create();
cairo_font_options_set_hint_style(fo, CAIRO_HINT_STYLE_FULL);
if (output->wlr_output->subpixel == WL_OUTPUT_SUBPIXEL_NONE) {
cairo_font_options_set_antialias(fo, CAIRO_ANTIALIAS_GRAY);
} else {
cairo_font_options_set_antialias(fo, CAIRO_ANTIALIAS_SUBPIXEL);
cairo_font_options_set_subpixel_order(fo,
to_cairo_subpixel_order(output->wlr_output->subpixel));
}
cairo_set_font_options(c, fo);
get_text_size(c, config->font, &width, NULL, &baseline, scale,
config->pango_markup, "%s", con->formatted_title);
cairo_surface_destroy(dummy_surface);
cairo_destroy(c);
if (width == 0 || height == 0) {
return;
}
if (height > config->font_height * scale) {
height = config->font_height * scale;
}
cairo_surface_t *surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, width, height);
cairo_t *cairo = cairo_create(surface);
cairo_set_antialias(cairo, CAIRO_ANTIALIAS_BEST);
cairo_set_font_options(cairo, fo);
cairo_font_options_destroy(fo);
cairo_set_source_rgba(cairo, class->background[0], class->background[1],
class->background[2], class->background[3]);
cairo_paint(cairo);
PangoContext *pango = pango_cairo_create_context(cairo);
cairo_set_source_rgba(cairo, class->text[0], class->text[1],
class->text[2], class->text[3]);
cairo_move_to(cairo, 0, config->font_baseline * scale - baseline);
pango_printf(cairo, config->font, scale, pango_markup, "%s", text);
cairo_surface_flush(surface);
unsigned char *data = cairo_image_surface_get_data(surface);
int stride = cairo_image_surface_get_stride(surface);
struct wlr_renderer *renderer = wlr_backend_get_renderer(
output->wlr_output->backend);
*texture = wlr_texture_from_pixels(
renderer, DRM_FORMAT_ARGB8888, stride, width, height, data);
cairo_surface_destroy(surface);
g_object_unref(pango);
cairo_destroy(cairo);
}
static void update_title_texture(struct sway_container *con,
struct wlr_texture **texture, struct border_colors *class) {
struct sway_output *output = container_get_effective_output(con);
if (!output) {
return;
}
if (*texture) {
wlr_texture_destroy(*texture);
*texture = NULL;
}
if (!con->formatted_title) {
return;
}
render_titlebar_text_texture(output, con, texture, class,
config->pango_markup, con->formatted_title);
}
void container_update_title_textures(struct sway_container *container) {
update_title_texture(container, &container->title_focused,
&config->border_colors.focused);
update_title_texture(container, &container->title_focused_inactive,
&config->border_colors.focused_inactive);
update_title_texture(container, &container->title_unfocused,
&config->border_colors.unfocused);
update_title_texture(container, &container->title_urgent,
&config->border_colors.urgent);
container_damage_whole(container);
}
/**
* Calculate and return the length of the tree representation.
* An example tree representation is: V[Terminal, Firefox]
* If buffer is not NULL, also populate the buffer with the representation.
*/
size_t container_build_representation(enum sway_container_layout layout,
list_t *children, char *buffer) {
size_t len = 2;
switch (layout) {
case L_VERT:
lenient_strcat(buffer, "V[");
break;
case L_HORIZ:
lenient_strcat(buffer, "H[");
break;
case L_TABBED:
lenient_strcat(buffer, "T[");
break;
case L_STACKED:
lenient_strcat(buffer, "S[");
break;
case L_NONE:
lenient_strcat(buffer, "D[");
break;
}
for (int i = 0; i < children->length; ++i) {
if (i != 0) {
++len;
lenient_strcat(buffer, " ");
}
struct sway_container *child = children->items[i];
const char *identifier = NULL;
if (child->view) {
identifier = view_get_class(child->view);
if (!identifier) {
identifier = view_get_app_id(child->view);
}
} else {
identifier = child->formatted_title;
}
if (identifier) {
len += strlen(identifier);
lenient_strcat(buffer, identifier);
} else {
len += 6;
lenient_strcat(buffer, "(null)");
}
}
++len;
lenient_strcat(buffer, "]");
return len;
}
void container_update_representation(struct sway_container *con) {
if (!con->view) {
size_t len = container_build_representation(con->pending.layout,
con->pending.children, NULL);
free(con->formatted_title);
con->formatted_title = calloc(len + 1, sizeof(char));
if (!sway_assert(con->formatted_title,
"Unable to allocate title string")) {
return;
}
container_build_representation(con->pending.layout, con->pending.children,
con->formatted_title);
container_update_title_textures(con);
}
if (con->pending.parent) {
container_update_representation(con->pending.parent);
} else if (con->pending.workspace) {
workspace_update_representation(con->pending.workspace);
}
}
size_t container_titlebar_height(void) {
return config->font_height + config->titlebar_v_padding * 2;
}
void floating_calculate_constraints(int *min_width, int *max_width,
int *min_height, int *max_height) {
if (config->floating_minimum_width == -1) { // no minimum
*min_width = 0;
} else if (config->floating_minimum_width == 0) { // automatic
*min_width = 75;
} else {
*min_width = config->floating_minimum_width;
}
if (config->floating_minimum_height == -1) { // no minimum
*min_height = 0;
} else if (config->floating_minimum_height == 0) { // automatic
*min_height = 50;
} else {
*min_height = config->floating_minimum_height;
}
struct wlr_box *box = wlr_output_layout_get_box(root->output_layout, NULL);
if (config->floating_maximum_width == -1) { // no maximum
*max_width = INT_MAX;
} else if (config->floating_maximum_width == 0) { // automatic
*max_width = box->width;
} else {
*max_width = config->floating_maximum_width;
}
if (config->floating_maximum_height == -1) { // no maximum
*max_height = INT_MAX;
} else if (config->floating_maximum_height == 0) { // automatic
*max_height = box->height;
} else {
*max_height = config->floating_maximum_height;
}
}
static void floating_natural_resize(struct sway_container *con) {
int min_width, max_width, min_height, max_height;
floating_calculate_constraints(&min_width, &max_width,
&min_height, &max_height);
if (!con->view) {
con->pending.width = fmax(min_width, fmin(con->pending.width, max_width));
con->pending.height = fmax(min_height, fmin(con->pending.height, max_height));
} else {
struct sway_view *view = con->view;
con->pending.content_width =
fmax(min_width, fmin(view->natural_width, max_width));
con->pending.content_height =
fmax(min_height, fmin(view->natural_height, max_height));
container_set_geometry_from_content(con);
}
}
void container_floating_resize_and_center(struct sway_container *con) {
struct sway_workspace *ws = con->pending.workspace;
if (!ws) {
// On scratchpad, just resize
floating_natural_resize(con);
return;
}
struct wlr_box *ob = wlr_output_layout_get_box(root->output_layout,
ws->output->wlr_output);
if (!ob) {
// On NOOP output. Will be called again when moved to an output
con->pending.x = 0;
con->pending.y = 0;
con->pending.width = 0;
con->pending.height = 0;
return;
}
floating_natural_resize(con);
if (!con->view) {
if (con->pending.width > ws->width || con->pending.height > ws->height) {
con->pending.x = ob->x + (ob->width - con->pending.width) / 2;
con->pending.y = ob->y + (ob->height - con->pending.height) / 2;
} else {
con->pending.x = ws->x + (ws->width - con->pending.width) / 2;
con->pending.y = ws->y + (ws->height - con->pending.height) / 2;
}
} else {
if (con->pending.content_width > ws->width
|| con->pending.content_height > ws->height) {
con->pending.content_x = ob->x + (ob->width - con->pending.content_width) / 2;
con->pending.content_y = ob->y + (ob->height - con->pending.content_height) / 2;
} else {
con->pending.content_x = ws->x + (ws->width - con->pending.content_width) / 2;
con->pending.content_y = ws->y + (ws->height - con->pending.content_height) / 2;
}
// If the view's border is B_NONE then these properties are ignored.
con->pending.border_top = con->pending.border_bottom = true;
con->pending.border_left = con->pending.border_right = true;
container_set_geometry_from_content(con);
}
}
void container_floating_set_default_size(struct sway_container *con) {
if (!sway_assert(con->pending.workspace, "Expected a container on a workspace")) {
return;
}
int min_width, max_width, min_height, max_height;
floating_calculate_constraints(&min_width, &max_width,
&min_height, &max_height);
struct wlr_box *box = calloc(1, sizeof(struct wlr_box));
workspace_get_box(con->pending.workspace, box);
double width = fmax(min_width, fmin(box->width * 0.5, max_width));
double height = fmax(min_height, fmin(box->height * 0.75, max_height));
if (!con->view) {
con->pending.width = width;
con->pending.height = height;
} else {
con->pending.content_width = width;
con->pending.content_height = height;
container_set_geometry_from_content(con);
}
free(box);
}
/**
* Indicate to clients in this container that they are participating in (or
* have just finished) an interactive resize
*/
void container_set_resizing(struct sway_container *con, bool resizing) {
if (!con) {
return;
}
if (con->view) {
if (con->view->impl->set_resizing) {
con->view->impl->set_resizing(con->view, resizing);
}
} else {
for (int i = 0; i < con->pending.children->length; ++i ) {
struct sway_container *child = con->pending.children->items[i];
container_set_resizing(child, resizing);
}
}
}
void container_set_floating(struct sway_container *container, bool enable) {
if (container_is_floating(container) == enable) {
return;
}
struct sway_seat *seat = input_manager_current_seat();
struct sway_workspace *workspace = container->pending.workspace;
struct sway_container *focus = seat_get_focused_container(seat);
bool set_focus = focus == container;
if (enable) {
struct sway_container *old_parent = container->pending.parent;
container_detach(container);
workspace_add_floating(workspace, container);
if (container->view) {
view_set_tiled(container->view, false);
if (container->view->using_csd) {
container->saved_border = container->pending.border;
container->pending.border = B_CSD;
if (container->view->xdg_decoration) {
struct sway_xdg_decoration *deco = container->view->xdg_decoration;
wlr_xdg_toplevel_decoration_v1_set_mode(deco->wlr_xdg_decoration,
WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE);
}
}
}
container_floating_set_default_size(container);
container_floating_resize_and_center(container);
if (old_parent) {
if (set_focus) {
seat_set_raw_focus(seat, &old_parent->node);
seat_set_raw_focus(seat, &container->node);
}
container_reap_empty(old_parent);
}
} else {
// Returning to tiled
if (container->scratchpad) {
root_scratchpad_remove_container(container);
}
container_detach(container);
struct sway_container *reference =
seat_get_focus_inactive_tiling(seat, workspace);
if (reference) {
if (reference->view) {
container_add_sibling(reference, container, 1);
} else {
container_add_child(reference, container);
}
container->pending.width = reference->pending.width;
container->pending.height = reference->pending.height;
} else {
struct sway_container *other =
workspace_add_tiling(workspace, container);
other->pending.width = workspace->width;
other->pending.height = workspace->height;
}
if (container->view) {
view_set_tiled(container->view, true);
if (container->view->using_csd) {
container->pending.border = container->saved_border;
if (container->view->xdg_decoration) {
struct sway_xdg_decoration *deco = container->view->xdg_decoration;
wlr_xdg_toplevel_decoration_v1_set_mode(deco->wlr_xdg_decoration,
WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
}
}
}
container->width_fraction = 0;
container->height_fraction = 0;
}
container_end_mouse_operation(container);
ipc_event_window(container, "floating");
}
void container_set_geometry_from_content(struct sway_container *con) {
if (!sway_assert(con->view, "Expected a view")) {
return;
}
if (!sway_assert(container_is_floating(con), "Expected a floating view")) {
return;
}
size_t border_width = 0;
size_t top = 0;
if (con->pending.border != B_CSD && !con->pending.fullscreen_mode) {
border_width = con->pending.border_thickness * (con->pending.border != B_NONE);
top = con->pending.border == B_NORMAL ?
container_titlebar_height() : border_width;
}
con->pending.x = con->pending.content_x - border_width;
con->pending.y = con->pending.content_y - top;
con->pending.width = con->pending.content_width + border_width * 2;
con->pending.height = top + con->pending.content_height + border_width;
node_set_dirty(&con->node);
}
bool container_is_floating(struct sway_container *container) {
if (!container->pending.parent && container->pending.workspace &&
list_find(container->pending.workspace->floating, container) != -1) {
return true;
}
if (container->scratchpad) {
return true;
}
return false;
}
bool container_is_current_floating(struct sway_container *container) {
if (!container->current.parent && container->current.workspace &&
list_find(container->current.workspace->floating, container) != -1) {
return true;
}
if (container->scratchpad) {
return true;
}
return false;
}
void container_get_box(struct sway_container *container, struct wlr_box *box) {
box->x = container->pending.x;
box->y = container->pending.y;
box->width = container->pending.width;
box->height = container->pending.height;
}
/**
* Translate the container's position as well as all children.
*/
void container_floating_translate(struct sway_container *con,
double x_amount, double y_amount) {
con->pending.x += x_amount;
con->pending.y += y_amount;
con->pending.content_x += x_amount;
con->pending.content_y += y_amount;
if (con->pending.children) {
for (int i = 0; i < con->pending.children->length; ++i) {
struct sway_container *child = con->pending.children->items[i];
container_floating_translate(child, x_amount, y_amount);
}
}
node_set_dirty(&con->node);
}
/**
* Choose an output for the floating container's new position.
*
* If the center of the container intersects an output then we'll choose that
* one, otherwise we'll choose whichever output is closest to the container's
* center.
*/
struct sway_output *container_floating_find_output(struct sway_container *con) {
double center_x = con->pending.x + con->pending.width / 2;
double center_y = con->pending.y + con->pending.height / 2;
struct sway_output *closest_output = NULL;
double closest_distance = DBL_MAX;
for (int i = 0; i < root->outputs->length; ++i) {
struct sway_output *output = root->outputs->items[i];
struct wlr_box output_box;
double closest_x, closest_y;
output_get_box(output, &output_box);
wlr_box_closest_point(&output_box, center_x, center_y,
&closest_x, &closest_y);
if (center_x == closest_x && center_y == closest_y) {
// The center of the floating container is on this output
return output;
}
double x_dist = closest_x - center_x;
double y_dist = closest_y - center_y;
double distance = x_dist * x_dist + y_dist * y_dist;
if (distance < closest_distance) {
closest_output = output;
closest_distance = distance;
}
}
return closest_output;
}
void container_floating_move_to(struct sway_container *con,
double lx, double ly) {
if (!sway_assert(container_is_floating(con),
"Expected a floating container")) {
return;
}
container_floating_translate(con, lx - con->pending.x, ly - con->pending.y);
if (container_is_scratchpad_hidden(con)) {
return;
}
struct sway_workspace *old_workspace = con->pending.workspace;
struct sway_output *new_output = container_floating_find_output(con);
if (!sway_assert(new_output, "Unable to find any output")) {
return;
}
struct sway_workspace *new_workspace =
output_get_active_workspace(new_output);
if (new_workspace && old_workspace != new_workspace) {
container_detach(con);
workspace_add_floating(new_workspace, con);
arrange_workspace(old_workspace);
arrange_workspace(new_workspace);
workspace_detect_urgent(old_workspace);
workspace_detect_urgent(new_workspace);
}
}
void container_floating_move_to_center(struct sway_container *con) {
if (!sway_assert(container_is_floating(con),
"Expected a floating container")) {
return;
}
struct sway_workspace *ws = con->pending.workspace;
double new_lx = ws->x + (ws->width - con->pending.width) / 2;
double new_ly = ws->y + (ws->height - con->pending.height) / 2;
container_floating_translate(con, new_lx - con->pending.x, new_ly - con->pending.y);
}
static bool find_urgent_iterator(struct sway_container *con, void *data) {
return con->view && view_is_urgent(con->view);
}
bool container_has_urgent_child(struct sway_container *container) {
return container_find_child(container, find_urgent_iterator, NULL);
}
void container_end_mouse_operation(struct sway_container *container) {
struct sway_seat *seat;
wl_list_for_each(seat, &server.input->seats, link) {
seatop_unref(seat, container);
}
}
static void set_fullscreen(struct sway_container *con, bool enable) {
if (!con->view) {
return;
}
if (con->view->impl->set_fullscreen) {
con->view->impl->set_fullscreen(con->view, enable);
if (con->view->foreign_toplevel) {
wlr_foreign_toplevel_handle_v1_set_fullscreen(
con->view->foreign_toplevel, enable);
}
}
}
static void container_fullscreen_workspace(struct sway_container *con) {
if (!sway_assert(con->pending.fullscreen_mode == FULLSCREEN_NONE,
"Expected a non-fullscreen container")) {
return;
}
set_fullscreen(con, true);
con->pending.fullscreen_mode = FULLSCREEN_WORKSPACE;
con->saved_x = con->pending.x;
con->saved_y = con->pending.y;
con->saved_width = con->pending.width;
con->saved_height = con->pending.height;
if (con->pending.workspace) {
con->pending.workspace->fullscreen = con;
struct sway_seat *seat;
struct sway_workspace *focus_ws;
wl_list_for_each(seat, &server.input->seats, link) {
focus_ws = seat_get_focused_workspace(seat);
if (focus_ws == con->pending.workspace) {
seat_set_focus_container(seat, con);
} else {
struct sway_node *focus =
seat_get_focus_inactive(seat, &root->node);
seat_set_raw_focus(seat, &con->node);
seat_set_raw_focus(seat, focus);
}
}
}
container_end_mouse_operation(con);
ipc_event_window(con, "fullscreen_mode");
}
static void container_fullscreen_global(struct sway_container *con) {
if (!sway_assert(con->pending.fullscreen_mode == FULLSCREEN_NONE,
"Expected a non-fullscreen container")) {
return;
}
set_fullscreen(con, true);
root->fullscreen_global = con;
con->saved_x = con->pending.x;
con->saved_y = con->pending.y;
con->saved_width = con->pending.width;
con->saved_height = con->pending.height;
struct sway_seat *seat;
wl_list_for_each(seat, &server.input->seats, link) {
struct sway_container *focus = seat_get_focused_container(seat);
if (focus && focus != con) {
seat_set_focus_container(seat, con);
}
}
con->pending.fullscreen_mode = FULLSCREEN_GLOBAL;
container_end_mouse_operation(con);
ipc_event_window(con, "fullscreen_mode");
}
void container_fullscreen_disable(struct sway_container *con) {
if (!sway_assert(con->pending.fullscreen_mode != FULLSCREEN_NONE,
"Expected a fullscreen container")) {
return;
}
set_fullscreen(con, false);
if (container_is_floating(con)) {
con->pending.x = con->saved_x;
con->pending.y = con->saved_y;
con->pending.width = con->saved_width;
con->pending.height = con->saved_height;
}
if (con->pending.fullscreen_mode == FULLSCREEN_WORKSPACE) {
if (con->pending.workspace) {
con->pending.workspace->fullscreen = NULL;
if (container_is_floating(con)) {
struct sway_output *output =
container_floating_find_output(con);
if (con->pending.workspace->output != output) {
container_floating_move_to_center(con);
}
}
}
} else {
root->fullscreen_global = NULL;
}
// If the container was mapped as fullscreen and set as floating by
// criteria, it needs to be reinitialized as floating to get the proper
// size and location
if (container_is_floating(con) && (con->pending.width == 0 || con->pending.height == 0)) {
container_floating_resize_and_center(con);
}
con->pending.fullscreen_mode = FULLSCREEN_NONE;
container_end_mouse_operation(con);
ipc_event_window(con, "fullscreen_mode");
if (con->scratchpad) {
struct sway_seat *seat;
wl_list_for_each(seat, &server.input->seats, link) {
struct sway_container *focus = seat_get_focused_container(seat);
if (focus == con || container_has_ancestor(focus, con)) {
seat_set_focus(seat,
seat_get_focus_inactive(seat, &root->node));
}
}
}
}
void container_set_fullscreen(struct sway_container *con,
enum sway_fullscreen_mode mode) {
if (con->pending.fullscreen_mode == mode) {
return;
}
switch (mode) {
case FULLSCREEN_NONE:
container_fullscreen_disable(con);
break;
case FULLSCREEN_WORKSPACE:
if (root->fullscreen_global) {
container_fullscreen_disable(root->fullscreen_global);
}
if (con->pending.workspace && con->pending.workspace->fullscreen) {
container_fullscreen_disable(con->pending.workspace->fullscreen);
}
container_fullscreen_workspace(con);
break;
case FULLSCREEN_GLOBAL:
if (root->fullscreen_global) {
container_fullscreen_disable(root->fullscreen_global);
}
if (con->pending.fullscreen_mode == FULLSCREEN_WORKSPACE) {
container_fullscreen_disable(con);
}
container_fullscreen_global(con);
break;
}
}
struct sway_container *container_toplevel_ancestor(
struct sway_container *container) {
while (container->pending.parent) {
container = container->pending.parent;
}
return container;
}
bool container_is_floating_or_child(struct sway_container *container) {
return container_is_floating(container_toplevel_ancestor(container));
}
bool container_is_fullscreen_or_child(struct sway_container *container) {
do {
if (container->pending.fullscreen_mode) {
return true;
}
container = container->pending.parent;
} while (container);
return false;
}
static void surface_send_enter_iterator(struct wlr_surface *surface,
int x, int y, void *data) {
struct wlr_output *wlr_output = data;
wlr_surface_send_enter(surface, wlr_output);
}
static void surface_send_leave_iterator(struct wlr_surface *surface,
int x, int y, void *data) {
struct wlr_output *wlr_output = data;
wlr_surface_send_leave(surface, wlr_output);
}
void container_discover_outputs(struct sway_container *con) {
struct wlr_box con_box = {
.x = con->current.x,
.y = con->current.y,
.width = con->current.width,
.height = con->current.height,
};
struct sway_output *old_output = container_get_effective_output(con);
for (int i = 0; i < root->outputs->length; ++i) {
struct sway_output *output = root->outputs->items[i];
struct wlr_box output_box;
output_get_box(output, &output_box);
struct wlr_box intersection;
bool intersects =
wlr_box_intersection(&intersection, &con_box, &output_box);
int index = list_find(con->outputs, output);
if (intersects && index == -1) {
// Send enter
sway_log(SWAY_DEBUG, "Container %p entered output %p", con, output);
if (con->view) {
view_for_each_surface(con->view,
surface_send_enter_iterator, output->wlr_output);
if (con->view->foreign_toplevel) {
wlr_foreign_toplevel_handle_v1_output_enter(
con->view->foreign_toplevel, output->wlr_output);
}
}
list_add(con->outputs, output);
} else if (!intersects && index != -1) {
// Send leave
sway_log(SWAY_DEBUG, "Container %p left output %p", con, output);
if (con->view) {
view_for_each_surface(con->view,
surface_send_leave_iterator, output->wlr_output);
if (con->view->foreign_toplevel) {
wlr_foreign_toplevel_handle_v1_output_leave(
con->view->foreign_toplevel, output->wlr_output);
}
}
list_del(con->outputs, index);
}
}
struct sway_output *new_output = container_get_effective_output(con);
double old_scale = old_output && old_output->enabled ?
old_output->wlr_output->scale : -1;
double new_scale = new_output ? new_output->wlr_output->scale : -1;
if (old_scale != new_scale) {
container_update_title_textures(con);
container_update_marks_textures(con);
}
}
enum sway_container_layout container_parent_layout(struct sway_container *con) {
if (con->pending.parent) {
return con->pending.parent->pending.layout;
}
if (con->pending.workspace) {
return con->pending.workspace->layout;
}
return L_NONE;
}
enum sway_container_layout container_current_parent_layout(
struct sway_container *con) {
if (con->current.parent) {
return con->current.parent->current.layout;
}
return con->current.workspace->current.layout;
}
list_t *container_get_siblings(struct sway_container *container) {
if (container->pending.parent) {
return container->pending.parent->pending.children;
}
if (container_is_scratchpad_hidden(container)) {
return NULL;
}
if (list_find(container->pending.workspace->tiling, container) != -1) {
return container->pending.workspace->tiling;
}
return container->pending.workspace->floating;
}
int container_sibling_index(struct sway_container *child) {
return list_find(container_get_siblings(child), child);
}
list_t *container_get_current_siblings(struct sway_container *container) {
if (container->current.parent) {
return container->current.parent->current.children;
}
return container->current.workspace->current.tiling;
}
void container_handle_fullscreen_reparent(struct sway_container *con) {
if (con->pending.fullscreen_mode != FULLSCREEN_WORKSPACE || !con->pending.workspace ||
con->pending.workspace->fullscreen == con) {
return;
}
if (con->pending.workspace->fullscreen) {
container_fullscreen_disable(con->pending.workspace->fullscreen);
}
con->pending.workspace->fullscreen = con;
arrange_workspace(con->pending.workspace);
}
static void set_workspace(struct sway_container *container, void *data) {
container->pending.workspace = container->pending.parent->pending.workspace;
}
void container_insert_child(struct sway_container *parent,
struct sway_container *child, int i) {
if (child->pending.workspace) {
container_detach(child);
}
list_insert(parent->pending.children, i, child);
child->pending.parent = parent;
child->pending.workspace = parent->pending.workspace;
container_for_each_child(child, set_workspace, NULL);
container_handle_fullscreen_reparent(child);
container_update_representation(parent);
}
void container_add_sibling(struct sway_container *fixed,
struct sway_container *active, bool after) {
if (active->pending.workspace) {
container_detach(active);
}
list_t *siblings = container_get_siblings(fixed);
int index = list_find(siblings, fixed);
list_insert(siblings, index + after, active);
active->pending.parent = fixed->pending.parent;
active->pending.workspace = fixed->pending.workspace;
container_for_each_child(active, set_workspace, NULL);
container_handle_fullscreen_reparent(active);
container_update_representation(active);
}
void container_add_child(struct sway_container *parent,
struct sway_container *child) {
if (child->pending.workspace) {
container_detach(child);
}
list_add(parent->pending.children, child);
child->pending.parent = parent;
child->pending.workspace = parent->pending.workspace;
container_for_each_child(child, set_workspace, NULL);
container_handle_fullscreen_reparent(child);
container_update_representation(parent);
node_set_dirty(&child->node);
node_set_dirty(&parent->node);
}
void container_detach(struct sway_container *child) {
if (child->pending.fullscreen_mode == FULLSCREEN_WORKSPACE) {
child->pending.workspace->fullscreen = NULL;
}
if (child->pending.fullscreen_mode == FULLSCREEN_GLOBAL) {
root->fullscreen_global = NULL;
}
struct sway_container *old_parent = child->pending.parent;
struct sway_workspace *old_workspace = child->pending.workspace;
list_t *siblings = container_get_siblings(child);
if (siblings) {
int index = list_find(siblings, child);
if (index != -1) {
list_del(siblings, index);
}
}
child->pending.parent = NULL;
child->pending.workspace = NULL;
container_for_each_child(child, set_workspace, NULL);
if (old_parent) {
container_update_representation(old_parent);
node_set_dirty(&old_parent->node);
} else if (old_workspace) {
workspace_update_representation(old_workspace);
node_set_dirty(&old_workspace->node);
}
node_set_dirty(&child->node);
}
void container_replace(struct sway_container *container,
struct sway_container *replacement) {
enum sway_fullscreen_mode fullscreen = container->pending.fullscreen_mode;
bool scratchpad = container->scratchpad;
struct sway_workspace *ws = NULL;
if (fullscreen != FULLSCREEN_NONE) {
container_fullscreen_disable(container);
}
if (scratchpad) {
ws = container->pending.workspace;
root_scratchpad_show(container);
root_scratchpad_remove_container(container);
}
if (container->pending.parent || container->pending.workspace) {
float width_fraction = container->width_fraction;
float height_fraction = container->height_fraction;
container_add_sibling(container, replacement, 1);
container_detach(container);
replacement->width_fraction = width_fraction;
replacement->height_fraction = height_fraction;
}
if (scratchpad) {
root_scratchpad_add_container(replacement, ws);
}
switch (fullscreen) {
case FULLSCREEN_WORKSPACE:
container_fullscreen_workspace(replacement);
break;
case FULLSCREEN_GLOBAL:
container_fullscreen_global(replacement);
break;
case FULLSCREEN_NONE:
// noop
break;
}
}
struct sway_container *container_split(struct sway_container *child,
enum sway_container_layout layout) {
// i3 doesn't split singleton H/V containers
// https://github.com/i3/i3/blob/3cd1c45eba6de073bc4300eebb4e1cc1a0c4479a/src/tree.c#L354
if (child->pending.parent || child->pending.workspace) {
list_t *siblings = container_get_siblings(child);
if (siblings->length == 1) {
enum sway_container_layout current = container_parent_layout(child);
if (container_is_floating(child)) {
current = L_NONE;
}
if (current == L_HORIZ || current == L_VERT) {
if (child->pending.parent) {
child->pending.parent->pending.layout = layout;
container_update_representation(child->pending.parent);
} else {
child->pending.workspace->layout = layout;
workspace_update_representation(child->pending.workspace);
}
return child;
}
}
}
struct sway_seat *seat = input_manager_get_default_seat();
bool set_focus = (seat_get_focus(seat) == &child->node);
if (container_is_floating(child) && child->view) {
view_set_tiled(child->view, true);
if (child->view->using_csd) {
child->pending.border = child->saved_border;
}
}
struct sway_container *cont = container_create(NULL);
cont->pending.width = child->pending.width;
cont->pending.height = child->pending.height;
cont->width_fraction = child->width_fraction;
cont->height_fraction = child->height_fraction;
cont->pending.x = child->pending.x;
cont->pending.y = child->pending.y;
cont->pending.layout = layout;
container_replace(child, cont);
container_add_child(cont, child);
if (set_focus) {
seat_set_raw_focus(seat, &cont->node);
if (cont->pending.fullscreen_mode == FULLSCREEN_GLOBAL) {
seat_set_focus(seat, &child->node);
} else {
seat_set_raw_focus(seat, &child->node);
}
}
return cont;
}
bool container_is_transient_for(struct sway_container *child,
struct sway_container *ancestor) {
return config->popup_during_fullscreen == POPUP_SMART &&
child->view && ancestor->view &&
view_is_transient_for(child->view, ancestor->view);
}
static bool find_by_mark_iterator(struct sway_container *con, void *data) {
char *mark = data;
return container_has_mark(con, mark);
}
struct sway_container *container_find_mark(char *mark) {
return root_find_container(find_by_mark_iterator, mark);
}
bool container_find_and_unmark(char *mark) {
struct sway_container *con = root_find_container(
find_by_mark_iterator, mark);
if (!con) {
return false;
}
for (int i = 0; i < con->marks->length; ++i) {
char *con_mark = con->marks->items[i];
if (strcmp(con_mark, mark) == 0) {
free(con_mark);
list_del(con->marks, i);
container_update_marks_textures(con);
ipc_event_window(con, "mark");
return true;
}
}
return false;
}
void container_clear_marks(struct sway_container *con) {
for (int i = 0; i < con->marks->length; ++i) {
free(con->marks->items[i]);
}
con->marks->length = 0;
ipc_event_window(con, "mark");
}
bool container_has_mark(struct sway_container *con, char *mark) {
for (int i = 0; i < con->marks->length; ++i) {
char *item = con->marks->items[i];
if (strcmp(item, mark) == 0) {
return true;
}
}
return false;
}
void container_add_mark(struct sway_container *con, char *mark) {
list_add(con->marks, strdup(mark));
ipc_event_window(con, "mark");
}
static void update_marks_texture(struct sway_container *con,
struct wlr_texture **texture, struct border_colors *class) {
struct sway_output *output = container_get_effective_output(con);
if (!output) {
return;
}
if (*texture) {
wlr_texture_destroy(*texture);
*texture = NULL;
}
if (!con->marks->length) {
return;
}
size_t len = 0;
for (int i = 0; i < con->marks->length; ++i) {
char *mark = con->marks->items[i];
if (mark[0] != '_') {
len += strlen(mark) + 2;
}
}
char *buffer = calloc(len + 1, 1);
char *part = malloc(len + 1);
if (!sway_assert(buffer && part, "Unable to allocate memory")) {
free(buffer);
return;
}
for (int i = 0; i < con->marks->length; ++i) {
char *mark = con->marks->items[i];
if (mark[0] != '_') {
sprintf(part, "[%s]", mark);
strcat(buffer, part);
}
}
free(part);
render_titlebar_text_texture(output, con, texture, class, false, buffer);
free(buffer);
}
void container_update_marks_textures(struct sway_container *con) {
if (!config->show_marks) {
return;
}
update_marks_texture(con, &con->marks_focused,
&config->border_colors.focused);
update_marks_texture(con, &con->marks_focused_inactive,
&config->border_colors.focused_inactive);
update_marks_texture(con, &con->marks_unfocused,
&config->border_colors.unfocused);
update_marks_texture(con, &con->marks_urgent,
&config->border_colors.urgent);
container_damage_whole(con);
}
void container_raise_floating(struct sway_container *con) {
// Bring container to front by putting it at the end of the floating list.
struct sway_container *floater = container_toplevel_ancestor(con);
if (container_is_floating(floater) && floater->pending.workspace) {
list_move_to_end(floater->pending.workspace->floating, floater);
node_set_dirty(&floater->pending.workspace->node);
}
}
bool container_is_scratchpad_hidden(struct sway_container *con) {
return con->scratchpad && !con->pending.workspace;
}
bool container_is_scratchpad_hidden_or_child(struct sway_container *con) {
con = container_toplevel_ancestor(con);
return con->scratchpad && !con->pending.workspace;
}
bool container_is_sticky(struct sway_container *con) {
return con->is_sticky && container_is_floating(con);
}
bool container_is_sticky_or_child(struct sway_container *con) {
return container_is_sticky(container_toplevel_ancestor(con));
}
static bool is_parallel(enum sway_container_layout first,
enum sway_container_layout second) {
switch (first) {
case L_TABBED:
case L_HORIZ:
return second == L_TABBED || second == L_HORIZ;
case L_STACKED:
case L_VERT:
return second == L_STACKED || second == L_VERT;
default:
return false;
}
}
static bool container_is_squashable(struct sway_container *con,
struct sway_container *child) {
enum sway_container_layout gp_layout = container_parent_layout(con);
return (con->pending.layout == L_HORIZ || con->pending.layout == L_VERT) &&
(child->pending.layout == L_HORIZ || child->pending.layout == L_VERT) &&
!is_parallel(con->pending.layout, child->pending.layout) &&
is_parallel(gp_layout, child->pending.layout);
}
static void container_squash_children(struct sway_container *con) {
for (int i = 0; i < con->pending.children->length; i++) {
struct sway_container *child = con->pending.children->items[i];
i += container_squash(child);
}
}
int container_squash(struct sway_container *con) {
if (!con->pending.children) {
return 0;
}
if (con->pending.children->length != 1) {
container_squash_children(con);
return 0;
}
struct sway_container *child = con->pending.children->items[0];
int idx = container_sibling_index(con);
int change = 0;
if (container_is_squashable(con, child)) {
// con and child are a redundant H/V pair. Destroy them.
while (child->pending.children->length) {
struct sway_container *current = child->pending.children->items[0];
container_detach(current);
if (con->pending.parent) {
container_insert_child(con->pending.parent, current, idx);
} else {
workspace_insert_tiling_direct(con->pending.workspace, current, idx);
}
change++;
}
// This will also destroy con because child was its only child
container_reap_empty(child);
change--;
} else {
container_squash_children(con);
}
return change;
}