swayfx/sway/desktop/layer_shell.c
2018-07-09 22:54:30 +01:00

384 lines
13 KiB
C

#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <wayland-server.h>
#include <wlr/types/wlr_box.h>
#include <wlr/types/wlr_layer_shell.h>
#include <wlr/types/wlr_output_damage.h>
#include <wlr/types/wlr_output.h>
#include <wlr/util/log.h>
#include "sway/input/input-manager.h"
#include "sway/input/seat.h"
#include "sway/layers.h"
#include "sway/output.h"
#include "sway/server.h"
#include "sway/tree/arrange.h"
#include "sway/tree/layout.h"
#include "log.h"
static void apply_exclusive(struct wlr_box *usable_area,
uint32_t anchor, int32_t exclusive,
int32_t margin_top, int32_t margin_right,
int32_t margin_bottom, int32_t margin_left) {
if (exclusive <= 0) {
return;
}
struct {
uint32_t anchors;
int *positive_axis;
int *negative_axis;
int margin;
} edges[] = {
{
.anchors =
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP,
.positive_axis = &usable_area->y,
.negative_axis = &usable_area->height,
.margin = margin_top,
},
{
.anchors =
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
.positive_axis = NULL,
.negative_axis = &usable_area->height,
.margin = margin_bottom,
},
{
.anchors =
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
.positive_axis = &usable_area->x,
.negative_axis = &usable_area->width,
.margin = margin_left,
},
{
.anchors =
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
.positive_axis = NULL,
.negative_axis = &usable_area->width,
.margin = margin_right,
},
};
for (size_t i = 0; i < sizeof(edges) / sizeof(edges[0]); ++i) {
if ((anchor & edges[i].anchors) == edges[i].anchors) {
if (edges[i].positive_axis) {
*edges[i].positive_axis += exclusive + edges[i].margin;
}
if (edges[i].negative_axis) {
*edges[i].negative_axis -= exclusive + edges[i].margin;
}
}
}
}
static void arrange_layer(struct sway_output *output, struct wl_list *list,
struct wlr_box *usable_area, bool exclusive) {
struct sway_layer_surface *sway_layer;
struct wlr_box full_area = { 0 };
wlr_output_effective_resolution(output->wlr_output,
&full_area.width, &full_area.height);
wl_list_for_each(sway_layer, list, link) {
struct wlr_layer_surface *layer = sway_layer->layer_surface;
struct wlr_layer_surface_state *state = &layer->current;
if (exclusive != (state->exclusive_zone > 0)) {
continue;
}
struct wlr_box bounds;
if (state->exclusive_zone == -1) {
bounds = full_area;
} else {
bounds = *usable_area;
}
struct wlr_box box = {
.width = state->desired_width,
.height = state->desired_height
};
// Horizontal axis
const uint32_t both_horiz = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
if ((state->anchor & both_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
const uint32_t both_vert = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
| ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM;
if ((state->anchor & both_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 & both_horiz) == both_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 & both_vert) == both_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_close(layer);
continue;
}
// Apply
sway_layer->geo = box;
apply_exclusive(usable_area, state->anchor, state->exclusive_zone,
state->margin.top, state->margin.right,
state->margin.bottom, state->margin.left);
wlr_layer_surface_configure(layer, box.width, box.height);
}
}
void arrange_layers(struct sway_output *output) {
struct wlr_box usable_area = { 0 };
wlr_output_effective_resolution(output->wlr_output,
&usable_area.width, &usable_area.height);
// Arrange exclusive surfaces from top->bottom
arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY],
&usable_area, true);
arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP],
&usable_area, true);
arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM],
&usable_area, true);
arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND],
&usable_area, true);
if (memcmp(&usable_area, &output->usable_area,
sizeof(struct wlr_box)) != 0) {
wlr_log(WLR_DEBUG, "Usable area changed, rearranging output");
memcpy(&output->usable_area, &usable_area, sizeof(struct wlr_box));
arrange_and_commit(output->swayc);
}
// Arrange non-exlusive surfaces from top->bottom
arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY],
&usable_area, false);
arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP],
&usable_area, false);
arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM],
&usable_area, false);
arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND],
&usable_area, false);
// Find topmost keyboard interactive layer, if such a layer exists
uint32_t layers_above_shell[] = {
ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY,
ZWLR_LAYER_SHELL_V1_LAYER_TOP,
};
size_t nlayers = sizeof(layers_above_shell) / sizeof(layers_above_shell[0]);
struct sway_layer_surface *layer, *topmost = NULL;
for (size_t i = 0; i < nlayers; ++i) {
wl_list_for_each_reverse(layer,
&output->layers[layers_above_shell[i]], link) {
if (layer->layer_surface->current.keyboard_interactive) {
topmost = layer;
break;
}
}
if (topmost != NULL) {
break;
}
}
struct sway_seat *seat;
wl_list_for_each(seat, &input_manager->seats, link) {
seat_set_focus_layer(seat, topmost ? topmost->layer_surface : NULL);
}
}
static void handle_output_destroy(struct wl_listener *listener, void *data) {
struct sway_layer_surface *sway_layer =
wl_container_of(listener, sway_layer, output_destroy);
wl_list_remove(&sway_layer->output_destroy.link);
wl_list_remove(&sway_layer->link);
wl_list_init(&sway_layer->link);
sway_layer->layer_surface->output = NULL;
wlr_layer_surface_close(sway_layer->layer_surface);
}
static void handle_surface_commit(struct wl_listener *listener, void *data) {
struct sway_layer_surface *layer =
wl_container_of(listener, layer, surface_commit);
struct wlr_layer_surface *layer_surface = layer->layer_surface;
struct wlr_output *wlr_output = layer_surface->output;
if (wlr_output == NULL) {
return;
}
struct sway_output *output = wlr_output->data;
struct wlr_box old_geo = layer->geo;
arrange_layers(output);
if (memcmp(&old_geo, &layer->geo, sizeof(struct wlr_box)) != 0) {
output_damage_surface(output, old_geo.x, old_geo.y,
layer_surface->surface, true);
output_damage_surface(output, layer->geo.x, layer->geo.y,
layer_surface->surface, true);
} else {
output_damage_surface(output, layer->geo.x, layer->geo.y,
layer_surface->surface, false);
}
}
static void unmap(struct sway_layer_surface *sway_layer) {
struct wlr_output *wlr_output = sway_layer->layer_surface->output;
if (wlr_output == NULL) {
return;
}
struct sway_output *output = wlr_output->data;
if (output == NULL || output->swayc == NULL) {
return;
}
output_damage_surface(output, sway_layer->geo.x, sway_layer->geo.y,
sway_layer->layer_surface->surface, true);
struct sway_seat *seat = input_manager_current_seat(input_manager);
if (seat->focused_layer == sway_layer->layer_surface) {
seat_set_focus_layer(seat, NULL);
}
}
static void handle_destroy(struct wl_listener *listener, void *data) {
struct sway_layer_surface *sway_layer =
wl_container_of(listener, sway_layer, destroy);
wlr_log(WLR_DEBUG, "Layer surface destroyed (%s)",
sway_layer->layer_surface->namespace);
if (sway_layer->layer_surface->mapped) {
unmap(sway_layer);
}
wl_list_remove(&sway_layer->link);
wl_list_remove(&sway_layer->destroy.link);
wl_list_remove(&sway_layer->map.link);
wl_list_remove(&sway_layer->unmap.link);
wl_list_remove(&sway_layer->surface_commit.link);
if (sway_layer->layer_surface->output != NULL) {
struct sway_output *output = sway_layer->layer_surface->output->data;
if (output != NULL && output->swayc != NULL) {
arrange_layers(output);
}
wl_list_remove(&sway_layer->output_destroy.link);
sway_layer->layer_surface->output = NULL;
}
free(sway_layer);
}
static void handle_map(struct wl_listener *listener, void *data) {
struct sway_layer_surface *sway_layer = wl_container_of(listener,
sway_layer, map);
struct sway_output *output = sway_layer->layer_surface->output->data;
output_damage_surface(output, sway_layer->geo.x, sway_layer->geo.y,
sway_layer->layer_surface->surface, true);
// TODO: send enter to subsurfaces and popups
wlr_surface_send_enter(sway_layer->layer_surface->surface,
sway_layer->layer_surface->output);
}
static void handle_unmap(struct wl_listener *listener, void *data) {
struct sway_layer_surface *sway_layer = wl_container_of(
listener, sway_layer, unmap);
unmap(sway_layer);
}
struct sway_layer_surface *layer_from_wlr_layer_surface(
struct wlr_layer_surface *layer_surface) {
return layer_surface->data;
}
void handle_layer_shell_surface(struct wl_listener *listener, void *data) {
struct wlr_layer_surface *layer_surface = data;
struct sway_server *server =
wl_container_of(listener, server, layer_shell_surface);
wlr_log(WLR_DEBUG, "new layer surface: namespace %s layer %d anchor %d "
"size %dx%d margin %d,%d,%d,%d",
layer_surface->namespace, layer_surface->layer, layer_surface->layer,
layer_surface->client_pending.desired_width,
layer_surface->client_pending.desired_height,
layer_surface->client_pending.margin.top,
layer_surface->client_pending.margin.right,
layer_surface->client_pending.margin.bottom,
layer_surface->client_pending.margin.left);
struct sway_layer_surface *sway_layer =
calloc(1, sizeof(struct sway_layer_surface));
if (!sway_layer) {
return;
}
if (!layer_surface->output) {
// Assign last active output
struct sway_container *output = NULL;
struct sway_seat *seat = input_manager_get_default_seat(input_manager);
if (seat) {
output = seat_get_focus_inactive(seat, &root_container);
}
if (!output) {
if (!sway_assert(root_container.children->length,
"cannot auto-assign output for layer")) {
wlr_layer_surface_close(layer_surface);
return;
}
output = root_container.children->items[0];
}
if (output->type != C_OUTPUT) {
output = container_parent(output, C_OUTPUT);
}
layer_surface->output = output->sway_output->wlr_output;
}
sway_layer->surface_commit.notify = handle_surface_commit;
wl_signal_add(&layer_surface->surface->events.commit,
&sway_layer->surface_commit);
sway_layer->destroy.notify = handle_destroy;
wl_signal_add(&layer_surface->events.destroy, &sway_layer->destroy);
sway_layer->map.notify = handle_map;
wl_signal_add(&layer_surface->events.map, &sway_layer->map);
sway_layer->unmap.notify = handle_unmap;
wl_signal_add(&layer_surface->events.unmap, &sway_layer->unmap);
// TODO: Listen for subsurfaces
sway_layer->layer_surface = layer_surface;
layer_surface->data = sway_layer;
struct sway_output *output = layer_surface->output->data;
sway_layer->output_destroy.notify = handle_output_destroy;
wl_signal_add(&output->events.destroy, &sway_layer->output_destroy);
wl_list_insert(&output->layers[layer_surface->layer], &sway_layer->link);
// Temporarily set the layer's current state to client_pending
// So that we can easily arrange it
struct wlr_layer_surface_state old_state = layer_surface->current;
layer_surface->current = layer_surface->client_pending;
arrange_layers(output);
layer_surface->current = old_state;
}