helvum 0.4.99

A GTK patchbay for pipewire
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

// Copyright 2021 Tom A. Wagner <tom.a.wagner@protonmail.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 3 as published by
// the Free Software Foundation.
//
// 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 <http://www.gnu.org/licenses/>.
//
// SPDX-License-Identifier: GPL-3.0-only

use gtk::{glib, prelude::*, subclass::prelude::*};
use pipewire::spa::Direction;

use super::Port;

mod imp {
    use super::*;

    use std::{
        cell::{Cell, RefCell},
        collections::HashSet,
    };

    #[derive(glib::Properties)]
    #[properties(wrapper_type = super::Node)]
    pub struct Node {
        #[property(get, set, construct_only)]
        pub(super) pipewire_id: Cell<u32>,
        pub(super) grid: gtk::Grid,
        #[property(
            name = "name", type = String,
            get = |this: &Self| this.label.text().to_string(),
            set = |this: &Self, val| {
                this.label.set_text(val);
                this.label.set_tooltip_text(Some(val));
            }
        )]
        pub(super) label: gtk::Label,
        pub(super) ports: RefCell<HashSet<Port>>,
        pub(super) num_ports_in: Cell<i32>,
        pub(super) num_ports_out: Cell<i32>,
    }

    #[glib::object_subclass]
    impl ObjectSubclass for Node {
        const NAME: &'static str = "HelvumNode";
        type Type = super::Node;
        type ParentType = gtk::Widget;

        fn class_init(klass: &mut Self::Class) {
            klass.set_layout_manager_type::<gtk::BinLayout>();
        }

        fn new() -> Self {
            let grid = gtk::Grid::new();

            let label = gtk::Label::new(None);
            label.set_wrap(true);
            label.set_lines(2);
            label.set_max_width_chars(20);
            label.set_ellipsize(gtk::pango::EllipsizeMode::End);

            grid.attach(&label, 0, 0, 2, 1);

            // Display a grab cursor when the mouse is over the label so the user knows the node can be dragged.
            label.set_cursor(gtk::gdk::Cursor::from_name("grab", None).as_ref());

            Self {
                pipewire_id: Cell::new(0),
                grid,
                label,
                ports: RefCell::new(HashSet::new()),
                num_ports_in: Cell::new(0),
                num_ports_out: Cell::new(0),
            }
        }
    }

    #[glib::derived_properties]
    impl ObjectImpl for Node {
        fn constructed(&self) {
            self.parent_constructed();
            self.grid.set_parent(&*self.obj());
        }

        fn dispose(&self) {
            self.grid.unparent();
        }
    }

    impl WidgetImpl for Node {}
}

glib::wrapper! {
    pub struct Node(ObjectSubclass<imp::Node>)
        @extends gtk::Widget;
}

impl Node {
    pub fn new(name: &str, pipewire_id: u32) -> Self {
        glib::Object::builder()
            .property("name", name)
            .property("pipewire-id", pipewire_id)
            .build()
    }

    pub fn add_port(&self, port: Port) {
        let imp = self.imp();

        match port.direction() {
            Direction::Input => {
                imp.grid.attach(&port, 0, imp.num_ports_in.get() + 1, 1, 1);
                imp.num_ports_in.set(imp.num_ports_in.get() + 1);
            }
            Direction::Output => {
                imp.grid.attach(&port, 1, imp.num_ports_out.get() + 1, 1, 1);
                imp.num_ports_out.set(imp.num_ports_out.get() + 1);
            }
            _ => unreachable!(),
        }

        imp.ports.borrow_mut().insert(port);
    }

    pub fn remove_port(&self, port: &Port) {
        let imp = self.imp();
        if imp.ports.borrow_mut().remove(port) {
            match port.direction() {
                Direction::Input => imp.num_ports_in.set(imp.num_ports_in.get() - 1),
                Direction::Output => imp.num_ports_in.set(imp.num_ports_out.get() - 1),
                _ => unreachable!(),
            }

            port.unparent();
        } else {
            log::warn!("Tried to remove non-existant port widget from node");
        }
    }
}