55 lines
2.3 KiB
Zig
55 lines
2.3 KiB
Zig
// This file is part of river, a dynamic tiling wayland compositor.
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//
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// Copyright 2020 Isaac Freund
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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, either version 3 of the License, or
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// (at your option) any later version.
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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 c = @import("../c.zig");
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const Arg = @import("../command.zig").Arg;
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const Seat = @import("../Seat.zig");
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const View = @import("../View.zig");
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const ViewStack = @import("../view_stack.zig").ViewStack;
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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(seat: *Seat, arg: Arg) void {
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const direction = arg.direction;
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const output = seat.focused_output;
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if (seat.focused_view) |current_focus| {
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// If there is a currently focused view, focus the next visible view in the stack.
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const focused_node = @fieldParentPtr(ViewStack(View).Node, "view", current_focus);
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var it = switch (direction) {
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.Next => ViewStack(View).iterator(focused_node, output.current_focused_tags),
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.Prev => ViewStack(View).reverseIterator(focused_node, output.current_focused_tags),
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};
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// Skip past the focused node
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_ = it.next();
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// Focus the next visible node if there is one
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if (it.next()) |node| {
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seat.focus(&node.view);
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return;
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}
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}
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// There is either no currently focused view or the last visible view in the
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// stack is focused and we need to wrap.
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var it = switch (direction) {
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.Next => ViewStack(View).iterator(output.views.first, output.current_focused_tags),
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.Prev => ViewStack(View).reverseIterator(output.views.last, output.current_focused_tags),
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};
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seat.focus(if (it.next()) |node| &node.view else null);
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}
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