75 lines
2.2 KiB
Zig
75 lines
2.2 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 PointerMapping = @This();
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const std = @import("std");
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const assert = std.debug.assert;
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const wlr = @import("wlroots");
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const util = @import("util.zig");
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pub const Action = union(enum) {
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move: void,
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resize: void,
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command: []const [:0]const u8,
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};
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event_code: u32,
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modifiers: wlr.Keyboard.ModifierMask,
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action: Action,
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/// Owns the memory backing the arguments if action is a command.
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arena_state: std.heap.ArenaAllocator.State,
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pub fn init(
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event_code: u32,
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modifiers: wlr.Keyboard.ModifierMask,
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action_type: std.meta.Tag(Action),
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command_args: []const [:0]const u8,
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) !PointerMapping {
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assert(action_type == .command or command_args.len == 1);
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var arena = std.heap.ArenaAllocator.init(util.gpa);
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errdefer arena.deinit();
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const action: Action = switch (action_type) {
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.move => .move,
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.resize => .resize,
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.command => blk: {
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const arena_allocator = arena.allocator();
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const owned_args = try arena_allocator.alloc([:0]const u8, command_args.len);
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for (command_args, 0..) |arg, i| {
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owned_args[i] = try arena_allocator.dupeZ(u8, arg);
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}
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break :blk .{ .command = owned_args };
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},
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};
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return PointerMapping{
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.event_code = event_code,
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.modifiers = modifiers,
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.action = action,
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.arena_state = arena.state,
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};
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}
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pub fn deinit(pointer_mapping: *PointerMapping) void {
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pointer_mapping.arena_state.promote(util.gpa).deinit();
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pointer_mapping.* = undefined;
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}
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