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// 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 Seat = @import("Seat.zig");
const command = struct {
const close = @import("command/close.zig").close;
const exit = @import("command/exit.zig").exit;
const focus = @import("command/focus.zig").focus;
const focusAllTags = @import("command/focus_all_tags.zig").focusAllTags;
const focusOutput = @import("command/focus_output.zig").focusOutput;
const focusTag = @import("command/focus_tag.zig").focusTag;
const modMasterCount = @import("command/mod_master_count.zig").modMasterCount;
const modMasterFactor = @import("command/mod_master_factor.zig").modMasterFactor;
const mode = @import("command/mode.zig").mode;
const sendToOutput = @import("command/send_to_output.zig").sendToOutput;
const spawn = @import("command/spawn.zig").spawn;
const tagView = @import("command/tag_view.zig").tagView;
const tagViewAllTags = @import("command/tag_view_all_tags.zig").tagViewAllTags;
const toggleFloat = @import("command/toggle_float.zig").toggleFloat;
const toggleTagFocus = @import("command/toggle_tag_focus.zig").toggleTagFocus;
const toggleViewTag = @import("command/toggle_view_tag.zig").toggleViewTag;
const zoom = @import("command/zoom.zig").zoom;
};
const Direction = enum {
Next,
Prev,
};
pub const Arg = union(enum) {
int: i32,
uint: u32,
float: f64,
str: []const u8,
direction: Direction,
none: void,
fn parse(
arg_type: @TagType(Arg),
args: []const []const u8,
allocator: *std.mem.Allocator,
) !Arg {
switch (arg_type) {
.int, .uint, .float, .direction => {
if (args.len == 0) return error.NotEnoughArguments;
if (args.len > 1) return error.TooManyArguments;
return switch (arg_type) {
.int => .{ .int = try std.fmt.parseInt(i32, args[0], 10) },
.uint => .{ .uint = try std.fmt.parseInt(u32, args[0], 10) },
.float => .{ .float = try std.fmt.parseFloat(f64, args[0]) },
.direction => if (std.mem.eql(u8, args[0], "next"))
Arg{ .direction = .Next }
else if (std.mem.eql(u8, args[0], "previous"))
Arg{ .direction = .Prev }
else
error.InvalidDirection,
else => unreachable,
};
},
.str => {
if (args.len == 0) return error.NotEnoughArguments;
return Arg{ .str = try std.mem.join(allocator, " ", args) };
},
.none => return if (args.len == 0) .{ .none = {} } else error.TooManyArguments,
}
}
};
const ImplFn = fn (seat: *Seat, arg: Arg) void;
const Definition = struct {
name: []const u8,
arg_type: @TagType(Arg),
impl: ImplFn,
};
// zig fmt: off
const str_to_read_fn = [_]Definition{
.{ .name = "close", .arg_type = .none, .impl = command.close },
.{ .name = "exit", .arg_type = .none, .impl = command.exit },
.{ .name = "focus", .arg_type = .direction, .impl = command.focus },
.{ .name = "focus_all_tags", .arg_type = .none, .impl = command.focusAllTags },
.{ .name = "focus_output", .arg_type = .direction, .impl = command.focusOutput },
.{ .name = "focus_tag", .arg_type = .uint, .impl = command.focusTag },
.{ .name = "mod_master_count", .arg_type = .int, .impl = command.modMasterCount },
.{ .name = "mod_master_factor", .arg_type = .float, .impl = command.modMasterFactor },
.{ .name = "mode", .arg_type = .str, .impl = command.mode },
.{ .name = "send_to_output", .arg_type = .direction, .impl = command.sendToOutput },
.{ .name = "spawn", .arg_type = .str, .impl = command.spawn },
.{ .name = "tag_view", .arg_type = .uint, .impl = command.tagView },
.{ .name = "tag_view_all_tags", .arg_type = .none, .impl = command.tagViewAllTags },
.{ .name = "toggle_float", .arg_type = .none, .impl = command.toggleFloat },
.{ .name = "toggle_tag_focus", .arg_type = .uint, .impl = command.toggleTagFocus },
.{ .name = "toggle_view_tag", .arg_type = .uint, .impl = command.toggleViewTag },
.{ .name = "zoom", .arg_type = .none, .impl = command.zoom },
};
// zig fmt: on
impl: ImplFn,
arg: Arg,
pub fn init(args: []const []const u8, allocator: *std.mem.Allocator) !Self {
if (args.len == 0) return error.NoCommand;
const name = args[0];
const definition = for (str_to_read_fn) |definition| {
if (std.mem.eql(u8, name, definition.name)) break definition;
} else return error.UnknownCommand;
return Self{
.impl = definition.impl,
.arg = try Arg.parse(definition.arg_type, args[1..], allocator),
};
}
pub fn deinit(self: Self, allocator: *std.mem.Allocator) void {
if (self.arg == .str) allocator.free(self.arg.str);
}
pub fn run(self: Self, seat: *Seat) void {
self.impl(seat, self.arg);
}
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