summaryrefslogtreecommitdiffstats
path: root/default-plugins/tab-bar/src/main.rs
blob: 8230467d1a8832b325077f2c0f40599c210323b3 (plain)
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
146
147
148
149
150
151
152
153
154
155
156
157
158
mod line;
mod tab;

use std::cmp::{max, min};
use std::collections::BTreeMap;
use std::convert::TryInto;

use tab::get_tab_to_focus;
use zellij_tile::prelude::*;

use crate::line::tab_line;
use crate::tab::tab_style;

#[derive(Debug, Default)]
pub struct LinePart {
    part: String,
    len: usize,
    tab_index: Option<usize>,
}

impl LinePart {
    pub fn append(&mut self, to_append: &LinePart) {
        self.part.push_str(&to_append.part);
        self.len += to_append.len;
    }
}

#[derive(Default)]
struct State {
    tabs: Vec<TabInfo>,
    active_tab_idx: usize,
    mode_info: ModeInfo,
    tab_line: Vec<LinePart>,
    hide_swap_layout_indication: bool,
}

static ARROW_SEPARATOR: &str = "";

register_plugin!(State);

impl ZellijPlugin for State {
    fn load(&mut self, configuration: BTreeMap<String, String>) {
        self.hide_swap_layout_indication = configuration
            .get("hide_swap_layout_indication")
            .map(|s| s == "true")
            .unwrap_or(false);
        set_selectable(false);
        subscribe(&[
            EventType::TabUpdate,
            EventType::ModeUpdate,
            EventType::Mouse,
        ]);
    }

    fn update(&mut self, event: Event) -> bool {
        let mut should_render = false;
        match event {
            Event::ModeUpdate(mode_info) => {
                if self.mode_info != mode_info {
                    should_render = true;
                }
                self.mode_info = mode_info;
            },
            Event::TabUpdate(tabs) => {
                if let Some(active_tab_index) = tabs.iter().position(|t| t.active) {
                    // tabs are indexed starting from 1 so we need to add 1
                    let active_tab_idx = active_tab_index + 1;

                    if self.active_tab_idx != active_tab_idx || self.tabs != tabs {
                        should_render = true;
                    }
                    self.active_tab_idx = active_tab_idx;
                    self.tabs = tabs;
                } else {
                    eprintln!("Could not find active tab.");
                }
            },
            Event::Mouse(me) => match me {
                Mouse::LeftClick(_, col) => {
                    let tab_to_focus = get_tab_to_focus(&self.tab_line, self.active_tab_idx, col);
                    if let Some(idx) = tab_to_focus {
                        switch_tab_to(idx.try_into().unwrap());
                    }
                },
                Mouse::ScrollUp(_) => {
                    switch_tab_to(min(self.active_tab_idx + 1, self.tabs.len()) as u32);
                },
                Mouse::ScrollDown(_) => {
                    switch_tab_to(max(self.active_tab_idx.saturating_sub(1), 1) as u32);
                },
                _ => {},
            },
            _ => {
                eprintln!("Got unrecognized event: {:?}", event);
            },
        }
        should_render
    }

    fn render(&mut self, _rows: usize, cols: usize) {
        if self.tabs.is_empty() {
            return;
        }
        let mut all_tabs: Vec<LinePart> = vec![];
        let mut active_tab_index = 0;
        let mut is_alternate_tab = false;
        for t in &mut self.tabs {
            let mut tabname = t.name.clone();
            if t.active && self.mode_info.mode == InputMode::RenameTab {
                if tabname.is_empty() {
                    tabname = String::from("Enter name...");
                }
                active_tab_index = t.position;
            } else if t.active {
                active_tab_index = t.position;
            }
            let tab = tab_style(
                tabname,
                t,
                is_alternate_tab,
                self.mode_info.style.colors,
                self.mode_info.capabilities,
            );
            is_alternate_tab = !is_alternate_tab;
            all_tabs.push(tab);
        }
        self.tab_line = tab_line(
            self.mode_info.session_name.as_deref(),
            all_tabs,
            active_tab_index,
            cols.saturating_sub(1),
            self.mode_info.style.colors,
            self.mode_info.capabilities,
            self.mode_info.style.hide_session_name,
            self.tabs.iter().find(|t| t.active),
            &self.mode_info,
            self.hide_swap_layout_indication,
        );

        let output = self
            .tab_line
            .iter()
            .fold(String::new(), |output, part| output + &part.part);

        let background = match self.mode_info.style.colors.theme_hue {
            ThemeHue::Dark => self.mode_info.style.colors.black,
            ThemeHue::Light => self.mode_info.style.colors.white,
        };
        match background {
            PaletteColor::Rgb((r, g, b)) => {
                print!("{}\u{1b}[48;2;{};{};{}m\u{1b}[0K", output, r, g, b);
            },
            PaletteColor::EightBit(color) => {
                print!("{}\u{1b}[48;5;{}m\u{1b}[0K", output, color);
            },
        }
    }
}