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#include "dwm.h"
/* local callbacks */
static void delete(struct wl_listener *ev, void *arg);
static void map(struct wl_listener *ev, void *arg);
static void unmap(struct wl_listener *ev, void *arg);
static void commit(struct wl_listener *ev, void *arg);
static void detach(struct wl_listener *ev, void *arg);
// -----------------------------------------------------------------------
// methods
static
void
applyexclusive(struct wlr_box *area, uint32 anchor, int ex, int32 mt, int32 mr, int32 mb, int32 ml)
{
if (ex <= 0)
return;
struct {
uint32 singular_anchor;
uint32 anchor_triplet;
int *positive_axis;
int *negative_axis;
int margin;
} edges[] = {
// Top
{
.singular_anchor = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP,
.anchor_triplet =
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP,
.positive_axis = &area->y,
.negative_axis = &area->height,
.margin = mt,
},
// Bottom
{
.singular_anchor = ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
.anchor_triplet =
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
.positive_axis = NULL,
.negative_axis = &area->height,
.margin = mb,
},
// Left
{
.singular_anchor = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT,
.anchor_triplet =
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
.positive_axis = &area->x,
.negative_axis = &area->width,
.margin = ml,
},
// Right
{
.singular_anchor = ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT,
.anchor_triplet =
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
.positive_axis = NULL,
.negative_axis = &area->width,
.margin = mr,
},
};
for (size_t i = 0; i < sizeof(edges) / sizeof(edges[0]); ++i) {
if ((anchor == edges[i].singular_anchor || anchor == edges[i].anchor_triplet)
&& ex + edges[i].margin > 0) {
if (edges[i].positive_axis) {
*edges[i].positive_axis += ex + edges[i].margin;
}
if (edges[i].negative_axis) {
*edges[i].negative_axis -= ex + edges[i].margin;
}
break;
}
}
}
static
void
arrangelayer(Monitor *m, struct wl_list *layers, struct wlr_box *area, int ex)
{
Layer *l;
uint32 horiz, vert;
struct wlr_box fullarea;
struct wlr_box box;
struct wlr_layer_surface_v1 *layer;
struct wlr_layer_surface_v1_state *state;
wlr_output_effective_resolution(m->dev, &fullarea.width, &fullarea.height);
wl_list_for_each(l, layers, link) {
layer = l->surf;
state = &layer->current;
if (ex != (state->exclusive_zone > 0))
continue;
struct wlr_box bounds;
if (state->exclusive_zone == -1)
bounds = fullarea;
else
bounds = *area;
box = (struct wlr_box){
.width = state->desired_width,
.height = state->desired_height
};
// Horizontal axis
horiz = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
if ((state->anchor & horiz) && box.width == 0) {
box.x = bounds.x;
box.width = bounds.width;
} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT)) {
box.x = bounds.x;
} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT)) {
box.x = bounds.x + (bounds.width - box.width);
} else {
box.x = bounds.x + ((bounds.width / 2) - (box.width / 2));
}
// Vertical axis
vert = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
| ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM;
if ((state->anchor & vert) && box.height == 0) {
box.y = bounds.y;
box.height = bounds.height;
} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP)) {
box.y = bounds.y;
} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM)) {
box.y = bounds.y + (bounds.height - box.height);
} else {
box.y = bounds.y + ((bounds.height / 2) - (box.height / 2));
}
// Margin
if ((state->anchor & horiz) == horiz) {
box.x += state->margin.left;
box.width -= state->margin.left + state->margin.right;
} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT)) {
box.x += state->margin.left;
} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT)) {
box.x -= state->margin.right;
}
if ((state->anchor & vert) == vert) {
box.y += state->margin.top;
box.height -= state->margin.top + state->margin.bottom;
} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP)) {
box.y += state->margin.top;
} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM)) {
box.y -= state->margin.bottom;
}
if (box.width < 0 || box.height < 0) {
// TODO: Bubble up a protocol error?
wlr_layer_surface_v1_close(layer);
continue;
}
l->dim= box;
applyexclusive(area, state->anchor, state->exclusive_zone,
state->margin.top, state->margin.right, state->margin.bottom, state->margin.left);
wlr_layer_surface_v1_configure(layer, box.width, box.height);
}
}
void
arrangelayers(Monitor *m)
{
int i;
Layer *it, *top;
struct wlr_box area;
wlr_output_effective_resolution(m->dev, &area.width, &area.height);
arrangelayer(m, &m->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY], &area, 1);
arrangelayer(m, &m->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP], &area, 1);
arrangelayer(m, &m->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM], &area, 1);
arrangelayer(m, &m->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND], &area, 1);
if (memcmp(&area, &m->area.win, sizeof(struct wlr_box)) != 0) {
memcpy(&m->area.win, &area, sizeof(struct wlr_box));
arrange(m);
}
arrangelayer(m, &m->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY], &area, 0);
arrangelayer(m, &m->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP], &area, 0);
arrangelayer(m, &m->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM], &area, 0);
arrangelayer(m, &m->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND], &area, 0);
uint32 layers[] = {
ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY,
ZWLR_LAYER_SHELL_V1_LAYER_TOP,
};
top = nil;
for (i = 0; i < arrlen(layers); i++) {
wl_list_for_each_reverse(it, &m->layers[layers[i]], link) {
if (it->surf->current.keyboard_interactive && it->surf->mapped) {
top = it;
break;
}
}
if (top)
break;
}
/* TODO: set focus here? */
}
// -----------------------------------------------------------------------
// implementations
void
evยทnewlayershell(struct wl_listener *ev, void *arg)
{
Monitor *m;
Layer *layer;
struct wlr_layer_surface_v1 *surf;
struct wlr_layer_surface_v1_state old;
surf = arg;
if (!surf->output)
surf->output = monitor->dev;
layer = surf->data = calloc(1, sizeof(*layer));
layer->surf = surf;
/* install callbacks */
layer->ev.free.notify = delete;
layer->ev.map.notify = map;
layer->ev.unmap.notify = unmap;
layer->ev.commit.notify = commit;
layer->ev.detach.notify = detach;
wl_signal_add(&surf->events.destroy, &layer->ev.free);
wl_signal_add(&surf->events.map, &layer->ev.map);
wl_signal_add(&surf->events.unmap, &layer->ev.unmap);
wl_signal_add(&surf->surface->events.commit, &layer->ev.commit);
wl_signal_add(&monitor->sig.kill, &layer->ev.detach);
m = surf->output->data;
wl_list_insert(&m->layers[surf->client_pending.layer], &layer->link);
/* song and dance: set as pending, arrange, then reset */
old = surf->current;
surf->current = surf->client_pending;
arrangelayers(m);
}
static
void
delete(struct wl_listener *ev, void *arg)
{
Layer *l;
l = wl_container_of(ev, l, ev.map);
wl_list_remove(&l->link);
wl_list_remove(&l->ev.free.link);
wl_list_remove(&l->ev.map.link);
wl_list_remove(&l->ev.unmap.link);
wl_list_remove(&l->ev.detach.link);
wl_list_remove(&l->ev.commit.link);
free(l);
}
static
void
detach(struct wl_listener *ev, void *arg)
{
/* no op */
}
static
void
map(struct wl_listener *ev, void *arg)
{
Layer *l;
Monitor *m;
l = wl_container_of(ev, l, ev.map);
m = l->surf->output->data;
/* TODO: damage */
wlr_surface_send_enter(l->surf->surface, l->surf->output);
/* TODO: cursor */
}
static
void
unmap(struct wl_listener *ev, void *arg)
{
/* TODO: fill in */
}
static
void
commit(struct wl_listener *ev, void *arg)
{
Layer *l;
Monitor *m;
char newdim, newlayer;
struct wlr_box old;
struct wlr_layer_surface_v1 *surf;
struct wlr_output *dev;
l = wl_container_of(ev, l, ev.commit);
surf = l->surf;
dev = surf->output;
m = dev->data;
old = l->dim;
arrangelayers(m);
newdim = memcmp(&old, &l->dim, sizeof(struct wlr_box)) != 0;
newlayer = l->z != surf->current.layer;
if (newdim) {
wl_list_remove(&l->link);
wl_list_insert(&m->layers[surf->current.layer], &l->link);
l->z = surf->current.layer;
}
}
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