81 lines
2.8 KiB
Zig
81 lines
2.8 KiB
Zig
// This file is part of river, a dynamic tiling wayland compositor.
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//
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// Copyright 2020 The River Developers
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 3.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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const std = @import("std");
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const assert = std.debug.assert;
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const server = &@import("../main.zig").server;
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const Direction = @import("../command.zig").Direction;
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const Error = @import("../command.zig").Error;
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const Output = @import("../Output.zig");
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const Seat = @import("../Seat.zig");
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const View = @import("../View.zig");
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/// Focus either the next or the previous visible view, depending on the enum
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/// passed. Does nothing if there are 1 or 0 views in the stack.
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pub fn focusView(
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seat: *Seat,
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args: []const [:0]const u8,
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_: *?[]const u8,
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) Error!void {
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if (args.len < 2) return Error.NotEnoughArguments;
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if (args.len > 2) return Error.TooManyArguments;
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const direction = std.meta.stringToEnum(Direction, args[1]) orelse return Error.InvalidDirection;
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const output = seat.focused_output orelse return;
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if (seat.focused != .view) return;
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if (seat.focused.view.pending.fullscreen) return;
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if (focusViewTarget(seat, output, direction)) |target| {
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assert(!target.pending.fullscreen);
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seat.focus(target);
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server.root.applyPending();
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}
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}
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fn focusViewTarget(seat: *Seat, output: *Output, direction: Direction) ?*View {
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switch (direction) {
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inline else => |dir| {
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const it_dir = comptime switch (dir) {
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.next => .forward,
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.previous => .reverse,
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};
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var it = output.pending.wm_stack.iterator(it_dir);
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while (it.next()) |view| {
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if (view == seat.focused.view) break;
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} else {
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unreachable;
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}
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// Return the next view in the stack matching the tags if any.
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while (it.next()) |view| {
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if (output.pending.tags & view.pending.tags != 0) return view;
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}
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// Wrap and return the first view in the stack matching the tags if
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// any is found before completing the loop back to the focused view.
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while (it.next()) |view| {
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if (view == seat.focused.view) return null;
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if (output.pending.tags & view.pending.tags != 0) return view;
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}
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unreachable;
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},
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}
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}
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