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const std = @import("std");
const c = @import("c.zig");
const Box = @import("box.zig");
const Log = @import("log.zig").Log;
const Output = @import("output.zig").Output;
pub const LayerSurface = struct {
const Self = @This();
output: *Output,
wlr_layer_surface: *c.wlr_layer_surface_v1,
/// True if the layer surface is currently mapped
mapped: bool,
box: Box,
layer: c.zwlr_layer_shell_v1_layer,
// Listeners active the entire lifetime of the layser surface
listen_destroy: c.wl_listener,
listen_map: c.wl_listener,
listen_unmap: c.wl_listener,
// Listeners only active while the layer surface is mapped
listen_commit: c.wl_listener,
listen_new_popup: c.wl_listener,
pub fn init(
self: *Self,
output: *Output,
wlr_layer_surface: *c.wlr_layer_surface_v1,
layer: c.zwlr_layer_shell_v1_layer,
) void {
self.output = output;
self.wlr_layer_surface = wlr_layer_surface;
wlr_layer_surface.data = self;
self.mapped = false;
self.box = undefined;
self.layer = layer;
// Set up listeners that are active for the entire lifetime of the layer surface
self.listen_destroy.notify = handleDestroy;
c.wl_signal_add(&self.wlr_layer_surface.events.destroy, &self.listen_destroy);
self.listen_map.notify = handleMap;
c.wl_signal_add(&self.wlr_layer_surface.events.map, &self.listen_map);
self.listen_unmap.notify = handleUnmap;
c.wl_signal_add(&self.wlr_layer_surface.events.unmap, &self.listen_unmap);
}
/// Send a configure event to the client with the dimensions of the current box
pub fn sendConfigure(self: Self) void {
c.wlr_layer_surface_v1_configure(self.wlr_layer_surface, self.box.width, self.box.height);
}
fn handleDestroy(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const self = @fieldParentPtr(Self, "listen_destroy", listener.?);
const output = self.output;
Log.Debug.log("Layer surface '{}' destroyed", .{self.wlr_layer_surface.namespace});
// Remove listeners active the entire lifetime of the layer surface
c.wl_list_remove(&self.listen_destroy.link);
c.wl_list_remove(&self.listen_map.link);
c.wl_list_remove(&self.listen_unmap.link);
const node = @fieldParentPtr(std.TailQueue(Self).Node, "data", self);
output.layers[@intCast(usize, @enumToInt(self.layer))].remove(node);
output.root.server.allocator.destroy(node);
}
fn handleMap(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const self = @fieldParentPtr(Self, "listen_map", listener.?);
const wlr_layer_surface = self.wlr_layer_surface;
Log.Debug.log("Layer surface '{}' mapped.", .{wlr_layer_surface.namespace});
self.mapped = true;
// Add listeners that are only active while mapped
self.listen_commit.notify = handleCommit;
c.wl_signal_add(&wlr_layer_surface.surface.*.events.commit, &self.listen_commit);
self.listen_new_popup.notify = handleNewPopup;
c.wl_signal_add(&wlr_layer_surface.events.new_popup, &self.listen_new_popup);
c.wlr_surface_send_enter(
wlr_layer_surface.surface,
wlr_layer_surface.output,
);
self.output.arrangeLayers();
}
fn handleUnmap(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const self = @fieldParentPtr(Self, "listen_unmap", listener.?);
Log.Debug.log("Layer surface '{}' unmapped.", .{self.wlr_layer_surface.namespace});
self.mapped = false;
// remove listeners only active while the layer surface is mapped
c.wl_list_remove(&self.listen_commit.link);
c.wl_list_remove(&self.listen_new_popup.link);
// If the unmapped surface is focused, clear focus
var it = self.output.root.server.input_manager.seats.first;
while (it) |node| : (it = node.next) {
const seat = &node.data;
if (seat.focused_layer) |current_focus| {
if (current_focus == self) {
seat.setFocusRaw(.{ .none = {} });
}
}
}
// This gives exclusive focus to a keyboard interactive top or overlay layer
// surface if there is one.
self.output.arrangeLayers();
// Ensure that focus is given to the appropriate view if there is no
// other top/overlay layer surface to grab focus.
it = self.output.root.server.input_manager.seats.first;
while (it) |node| : (it = node.next) {
const seat = &node.data;
seat.focus(null);
}
}
fn handleCommit(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const self = @fieldParentPtr(Self, "listen_commit", listener.?);
const wlr_layer_surface = self.wlr_layer_surface;
if (self.wlr_layer_surface.output == null) {
Log.Error.log("Layer surface committed with null output", .{});
return;
}
// If the layer changed, move the LayerSurface to the proper list
if (self.layer != self.wlr_layer_surface.current.layer) {
const node = @fieldParentPtr(std.TailQueue(Self).Node, "data", self);
const old_layer_idx = @intCast(usize, @enumToInt(self.layer));
self.output.layers[old_layer_idx].remove(node);
self.layer = self.wlr_layer_surface.current.layer;
const new_layer_idx = @intCast(usize, @enumToInt(self.layer));
self.output.layers[new_layer_idx].append(node);
}
// TODO: only reconfigure if things haven't changed
// https://github.com/swaywm/wlroots/issues/1079
self.output.arrangeLayers();
}
fn handleNewPopup(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const self = @fieldParentPtr(Self, "listen_new_popup", listener.?);
Log.Debug.log("new layer surface popup.", .{});
// TODO: handle popups
unreachable;
}
};
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