Split river and riverctl directories

river/XdgPopup.zig

@@ -0,0 +1,82 @@
+// This file is part of river, a dynamic tiling wayland compositor.
+//
+// Copyright 2020 Isaac Freund
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+const Self = @This();
+
+const std = @import("std");
+
+const c = @import("c.zig");
+
+const Box = @import("Box.zig");
+const Output = @import("Output.zig");
+
+/// The output this popup is displayed on.
+output: *Output,
+
+/// Box of the parent of this popup tree. Needed to unconstrain child popups.
+parent_box: *const Box,
+
+/// The corresponding wlroots object
+wlr_xdg_popup: *c.wlr_xdg_popup,
+
+listen_destroy: c.wl_listener,
+listen_new_popup: c.wl_listener,
+
+pub fn init(
+    self: *Self,
+    output: *Output,
+    parent_box: *const Box,
+    wlr_xdg_popup: *c.wlr_xdg_popup,
+) void {
+    self.output = output;
+    self.parent_box = parent_box;
+    self.wlr_xdg_popup = wlr_xdg_popup;
+
+    // The output box relative to the parent of the popup
+    var box = c.wlr_output_layout_get_box(output.root.wlr_output_layout, output.wlr_output).*;
+    box.x -= parent_box.x;
+    box.y -= parent_box.y;
+    c.wlr_xdg_popup_unconstrain_from_box(wlr_xdg_popup, &box);
+
+    // Setup listeners
+    self.listen_destroy.notify = handleDestroy;
+    c.wl_signal_add(&wlr_xdg_popup.base.*.events.destroy, &self.listen_destroy);
+
+    self.listen_new_popup.notify = handleNewPopup;
+    c.wl_signal_add(&wlr_xdg_popup.base.*.events.new_popup, &self.listen_new_popup);
+}
+
+fn handleDestroy(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
+    const self = @fieldParentPtr(Self, "listen_destroy", listener.?);
+    const allocator = self.output.root.server.allocator;
+
+    c.wl_list_remove(&self.listen_destroy.link);
+    c.wl_list_remove(&self.listen_new_popup.link);
+
+    allocator.destroy(self);
+}
+
+/// Called when a new xdg popup is requested by the client
+fn handleNewPopup(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
+    const self = @fieldParentPtr(Self, "listen_new_popup", listener.?);
+    const wlr_xdg_popup = @ptrCast(*c.wlr_xdg_popup, @alignCast(@alignOf(*c.wlr_xdg_popup), data));
+    const allocator = self.output.root.server.allocator;
+
+    // This will free itself on destroy
+    var xdg_popup = allocator.create(Self) catch unreachable;
+    xdg_popup.init(self.output, self.parent_box, wlr_xdg_popup);
+}