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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 std = @import("std");
const Seat = @import("Seat.zig");
const impl = 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 layout = @import("command/layout.zig").layout;
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;
};
pub const Direction = enum {
Next,
Prev,
pub fn parse(str: []const u8) error{InvalidDirection}!Direction {
return if (std.mem.eql(u8, str, "next"))
Direction.Next
else if (std.mem.eql(u8, str, "previous"))
Direction.Prev
else
error.InvalidDirection;
}
};
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 Definition = struct {
name: []const u8,
impl: fn (*std.mem.Allocator, *Seat, []const []const u8, *[]const u8) Error!void,
};
// TODO: this could be replaced with a comptime hashmap
// zig fmt: off
const str_to_impl_fn = [_]Definition{
.{ .name = "close", .impl = impl.close },
.{ .name = "exit", .impl = impl.exit },
.{ .name = "focus", .impl = impl.focus },
.{ .name = "focus_all_tags", .impl = impl.focusAllTags },
.{ .name = "focus_output", .impl = impl.focusOutput },
.{ .name = "focus_tag", .impl = impl.focusTag },
.{ .name = "layout", .impl = impl.layout},
.{ .name = "mod_master_count", .impl = impl.modMasterCount },
.{ .name = "mod_master_factor", .impl = impl.modMasterFactor },
.{ .name = "mode", .impl = impl.mode },
.{ .name = "send_to_output", .impl = impl.sendToOutput },
.{ .name = "spawn", .impl = impl.spawn },
.{ .name = "tag_view", .impl = impl.tagView },
.{ .name = "tag_view_all_tags", .impl = impl.tagViewAllTags },
.{ .name = "toggle_float", .impl = impl.toggleFloat },
.{ .name = "toggle_tag_focus", .impl = impl.toggleTagFocus },
.{ .name = "toggle_view_tag", .impl = impl.toggleViewTag },
.{ .name = "zoom", .impl = impl.zoom },
};
// zig fmt: on
pub const Error = error{
NoCommand,
UnknownCommand,
NotEnoughArguments,
TooManyArguments,
Overflow,
InvalidCharacter,
InvalidDirection,
OutOfMemory,
CommandFailed,
};
/// Run a command for the given Seat. The `args` parameter is similar to the
/// classic argv in that the command to be run is passed as the first argument.
/// If the command fails with Error.CommandFailed, a failure message will be
/// allocated and the slice pointed to by the `failure_message` parameter will
/// be set to point to it. The caller is responsible for freeing this message
/// in the case of failure.
pub fn run(
allocator: *std.mem.Allocator,
seat: *Seat,
args: []const []const u8,
failure_message: *[]const u8,
) Error!void {
if (args.len == 0) return Error.NoCommand;
const name = args[0];
const impl_fn = for (str_to_impl_fn) |definition| {
if (std.mem.eql(u8, name, definition.name)) break definition.impl;
} else return Error.UnknownCommand;
try impl_fn(allocator, seat, args, failure_message);
}
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