mirror of https://github.com/swaywm/sway.git
384 lines
13 KiB
C
384 lines
13 KiB
C
#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wayland-server.h>
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#include <wlr/types/wlr_box.h>
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#include <wlr/types/wlr_layer_shell.h>
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#include <wlr/types/wlr_output_damage.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/util/log.h>
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#include "sway/input/input-manager.h"
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#include "sway/input/seat.h"
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#include "sway/layers.h"
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#include "sway/output.h"
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#include "sway/server.h"
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#include "sway/tree/arrange.h"
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#include "sway/tree/layout.h"
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#include "log.h"
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static void apply_exclusive(struct wlr_box *usable_area,
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uint32_t anchor, int32_t exclusive,
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int32_t margin_top, int32_t margin_right,
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int32_t margin_bottom, int32_t margin_left) {
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if (exclusive <= 0) {
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return;
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}
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struct {
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uint32_t anchors;
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int *positive_axis;
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int *negative_axis;
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int margin;
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} edges[] = {
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{
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.anchors =
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ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
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ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
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ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP,
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.positive_axis = &usable_area->y,
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.negative_axis = &usable_area->height,
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.margin = margin_top,
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},
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{
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.anchors =
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ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
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ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
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ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
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.positive_axis = NULL,
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.negative_axis = &usable_area->height,
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.margin = margin_bottom,
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},
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{
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.anchors =
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ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
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ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
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ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
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.positive_axis = &usable_area->x,
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.negative_axis = &usable_area->width,
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.margin = margin_left,
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},
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{
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.anchors =
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ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
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ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
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ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM,
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.positive_axis = NULL,
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.negative_axis = &usable_area->width,
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.margin = margin_right,
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},
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};
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for (size_t i = 0; i < sizeof(edges) / sizeof(edges[0]); ++i) {
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if ((anchor & edges[i].anchors) == edges[i].anchors) {
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if (edges[i].positive_axis) {
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*edges[i].positive_axis += exclusive + edges[i].margin;
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}
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if (edges[i].negative_axis) {
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*edges[i].negative_axis -= exclusive + edges[i].margin;
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}
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}
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}
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}
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static void arrange_layer(struct sway_output *output, struct wl_list *list,
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struct wlr_box *usable_area, bool exclusive) {
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struct sway_layer_surface *sway_layer;
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struct wlr_box full_area = { 0 };
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wlr_output_effective_resolution(output->wlr_output,
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&full_area.width, &full_area.height);
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wl_list_for_each(sway_layer, list, link) {
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struct wlr_layer_surface *layer = sway_layer->layer_surface;
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struct wlr_layer_surface_state *state = &layer->current;
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if (exclusive != (state->exclusive_zone > 0)) {
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continue;
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}
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struct wlr_box bounds;
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if (state->exclusive_zone == -1) {
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bounds = full_area;
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} else {
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bounds = *usable_area;
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}
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struct wlr_box box = {
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.width = state->desired_width,
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.height = state->desired_height
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};
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// Horizontal axis
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const uint32_t both_horiz = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
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| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
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if ((state->anchor & both_horiz) && box.width == 0) {
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box.x = bounds.x;
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box.width = bounds.width;
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} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT)) {
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box.x = bounds.x;
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} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT)) {
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box.x = bounds.x + (bounds.width - box.width);
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} else {
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box.x = bounds.x + ((bounds.width / 2) - (box.width / 2));
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}
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// Vertical axis
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const uint32_t both_vert = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
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| ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM;
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if ((state->anchor & both_vert) && box.height == 0) {
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box.y = bounds.y;
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box.height = bounds.height;
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} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP)) {
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box.y = bounds.y;
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} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM)) {
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box.y = bounds.y + (bounds.height - box.height);
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} else {
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box.y = bounds.y + ((bounds.height / 2) - (box.height / 2));
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}
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// Margin
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if ((state->anchor & both_horiz) == both_horiz) {
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box.x += state->margin.left;
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box.width -= state->margin.left + state->margin.right;
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} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT)) {
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box.x += state->margin.left;
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} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT)) {
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box.x -= state->margin.right;
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}
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if ((state->anchor & both_vert) == both_vert) {
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box.y += state->margin.top;
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box.height -= state->margin.top + state->margin.bottom;
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} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP)) {
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box.y += state->margin.top;
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} else if ((state->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM)) {
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box.y -= state->margin.bottom;
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}
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if (box.width < 0 || box.height < 0) {
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// TODO: Bubble up a protocol error?
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wlr_layer_surface_close(layer);
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continue;
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}
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// Apply
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sway_layer->geo = box;
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apply_exclusive(usable_area, state->anchor, state->exclusive_zone,
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state->margin.top, state->margin.right,
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state->margin.bottom, state->margin.left);
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wlr_layer_surface_configure(layer, box.width, box.height);
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}
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}
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void arrange_layers(struct sway_output *output) {
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struct wlr_box usable_area = { 0 };
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wlr_output_effective_resolution(output->wlr_output,
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&usable_area.width, &usable_area.height);
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// Arrange exclusive surfaces from top->bottom
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arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY],
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&usable_area, true);
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arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP],
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&usable_area, true);
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arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM],
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&usable_area, true);
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arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND],
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&usable_area, true);
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if (memcmp(&usable_area, &output->usable_area,
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sizeof(struct wlr_box)) != 0) {
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wlr_log(WLR_DEBUG, "Usable area changed, rearranging output");
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memcpy(&output->usable_area, &usable_area, sizeof(struct wlr_box));
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arrange_and_commit(output->swayc);
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}
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// Arrange non-exlusive surfaces from top->bottom
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arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY],
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&usable_area, false);
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arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP],
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&usable_area, false);
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arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM],
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&usable_area, false);
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arrange_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND],
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&usable_area, false);
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// Find topmost keyboard interactive layer, if such a layer exists
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uint32_t layers_above_shell[] = {
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ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY,
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ZWLR_LAYER_SHELL_V1_LAYER_TOP,
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};
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size_t nlayers = sizeof(layers_above_shell) / sizeof(layers_above_shell[0]);
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struct sway_layer_surface *layer, *topmost = NULL;
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for (size_t i = 0; i < nlayers; ++i) {
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wl_list_for_each_reverse(layer,
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&output->layers[layers_above_shell[i]], link) {
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if (layer->layer_surface->current.keyboard_interactive) {
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topmost = layer;
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break;
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}
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}
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if (topmost != NULL) {
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break;
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}
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}
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struct sway_seat *seat;
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wl_list_for_each(seat, &input_manager->seats, link) {
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seat_set_focus_layer(seat, topmost ? topmost->layer_surface : NULL);
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}
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}
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static void handle_output_destroy(struct wl_listener *listener, void *data) {
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struct sway_layer_surface *sway_layer =
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wl_container_of(listener, sway_layer, output_destroy);
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wl_list_remove(&sway_layer->output_destroy.link);
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wl_list_remove(&sway_layer->link);
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wl_list_init(&sway_layer->link);
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sway_layer->layer_surface->output = NULL;
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wlr_layer_surface_close(sway_layer->layer_surface);
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}
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static void handle_surface_commit(struct wl_listener *listener, void *data) {
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struct sway_layer_surface *layer =
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wl_container_of(listener, layer, surface_commit);
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struct wlr_layer_surface *layer_surface = layer->layer_surface;
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struct wlr_output *wlr_output = layer_surface->output;
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if (wlr_output == NULL) {
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return;
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}
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struct sway_output *output = wlr_output->data;
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struct wlr_box old_geo = layer->geo;
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arrange_layers(output);
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if (memcmp(&old_geo, &layer->geo, sizeof(struct wlr_box)) != 0) {
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output_damage_surface(output, old_geo.x, old_geo.y,
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layer_surface->surface, true);
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output_damage_surface(output, layer->geo.x, layer->geo.y,
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layer_surface->surface, true);
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} else {
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output_damage_surface(output, layer->geo.x, layer->geo.y,
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layer_surface->surface, false);
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}
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}
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static void unmap(struct sway_layer_surface *sway_layer) {
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struct wlr_output *wlr_output = sway_layer->layer_surface->output;
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if (wlr_output == NULL) {
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return;
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}
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struct sway_output *output = wlr_output->data;
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if (output == NULL || output->swayc == NULL) {
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return;
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}
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output_damage_surface(output, sway_layer->geo.x, sway_layer->geo.y,
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sway_layer->layer_surface->surface, true);
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struct sway_seat *seat = input_manager_current_seat(input_manager);
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if (seat->focused_layer == sway_layer->layer_surface) {
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seat_set_focus_layer(seat, NULL);
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}
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}
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static void handle_destroy(struct wl_listener *listener, void *data) {
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struct sway_layer_surface *sway_layer =
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wl_container_of(listener, sway_layer, destroy);
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wlr_log(WLR_DEBUG, "Layer surface destroyed (%s)",
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sway_layer->layer_surface->namespace);
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if (sway_layer->layer_surface->mapped) {
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unmap(sway_layer);
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}
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wl_list_remove(&sway_layer->link);
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wl_list_remove(&sway_layer->destroy.link);
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wl_list_remove(&sway_layer->map.link);
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wl_list_remove(&sway_layer->unmap.link);
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wl_list_remove(&sway_layer->surface_commit.link);
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if (sway_layer->layer_surface->output != NULL) {
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struct sway_output *output = sway_layer->layer_surface->output->data;
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if (output != NULL && output->swayc != NULL) {
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arrange_layers(output);
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}
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wl_list_remove(&sway_layer->output_destroy.link);
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sway_layer->layer_surface->output = NULL;
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}
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free(sway_layer);
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}
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static void handle_map(struct wl_listener *listener, void *data) {
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struct sway_layer_surface *sway_layer = wl_container_of(listener,
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sway_layer, map);
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struct sway_output *output = sway_layer->layer_surface->output->data;
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output_damage_surface(output, sway_layer->geo.x, sway_layer->geo.y,
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sway_layer->layer_surface->surface, true);
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// TODO: send enter to subsurfaces and popups
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wlr_surface_send_enter(sway_layer->layer_surface->surface,
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sway_layer->layer_surface->output);
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}
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static void handle_unmap(struct wl_listener *listener, void *data) {
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struct sway_layer_surface *sway_layer = wl_container_of(
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listener, sway_layer, unmap);
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unmap(sway_layer);
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}
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struct sway_layer_surface *layer_from_wlr_layer_surface(
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struct wlr_layer_surface *layer_surface) {
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return layer_surface->data;
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}
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void handle_layer_shell_surface(struct wl_listener *listener, void *data) {
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struct wlr_layer_surface *layer_surface = data;
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struct sway_server *server =
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wl_container_of(listener, server, layer_shell_surface);
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wlr_log(WLR_DEBUG, "new layer surface: namespace %s layer %d anchor %d "
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"size %dx%d margin %d,%d,%d,%d",
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layer_surface->namespace, layer_surface->layer, layer_surface->layer,
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layer_surface->client_pending.desired_width,
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layer_surface->client_pending.desired_height,
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layer_surface->client_pending.margin.top,
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layer_surface->client_pending.margin.right,
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layer_surface->client_pending.margin.bottom,
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layer_surface->client_pending.margin.left);
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struct sway_layer_surface *sway_layer =
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calloc(1, sizeof(struct sway_layer_surface));
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if (!sway_layer) {
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return;
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}
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if (!layer_surface->output) {
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// Assign last active output
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struct sway_container *output = NULL;
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struct sway_seat *seat = input_manager_get_default_seat(input_manager);
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if (seat) {
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output = seat_get_focus_inactive(seat, &root_container);
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}
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if (!output) {
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if (!sway_assert(root_container.children->length,
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"cannot auto-assign output for layer")) {
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wlr_layer_surface_close(layer_surface);
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return;
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}
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output = root_container.children->items[0];
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}
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if (output->type != C_OUTPUT) {
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output = container_parent(output, C_OUTPUT);
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}
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layer_surface->output = output->sway_output->wlr_output;
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}
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sway_layer->surface_commit.notify = handle_surface_commit;
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wl_signal_add(&layer_surface->surface->events.commit,
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&sway_layer->surface_commit);
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sway_layer->destroy.notify = handle_destroy;
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wl_signal_add(&layer_surface->events.destroy, &sway_layer->destroy);
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sway_layer->map.notify = handle_map;
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wl_signal_add(&layer_surface->events.map, &sway_layer->map);
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sway_layer->unmap.notify = handle_unmap;
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wl_signal_add(&layer_surface->events.unmap, &sway_layer->unmap);
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// TODO: Listen for subsurfaces
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sway_layer->layer_surface = layer_surface;
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layer_surface->data = sway_layer;
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struct sway_output *output = layer_surface->output->data;
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sway_layer->output_destroy.notify = handle_output_destroy;
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wl_signal_add(&output->events.destroy, &sway_layer->output_destroy);
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wl_list_insert(&output->layers[layer_surface->layer], &sway_layer->link);
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// Temporarily set the layer's current state to client_pending
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// So that we can easily arrange it
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struct wlr_layer_surface_state old_state = layer_surface->current;
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layer_surface->current = layer_surface->client_pending;
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arrange_layers(output);
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layer_surface->current = old_state;
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}
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