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

//! Switches between [GNOME Shell](https://wiki.gnome.org/Projects/GnomeShell) user themes, like
//! the [User Themes extension](https://extensions.gnome.org/extension/19/user-themes/) does
//!
//! ## Usage: Linux & BSD
//! GNOME Shell user themes require the [User Themes
//! extension](https://extensions.gnome.org/extension/19/user-themes/) to be enabled.  Once that's
//! done, simply provide the name of the theme as displayed in the User Themes extension config
//! (either via GNOME Extensions or GNOME Tweaks), e.g.:
//!
//! ```toml
//! [gnome-shell]
//! light = "Arc"
//! dark = "Arc-Dark-solid"
//! ```
//!
//! ## Usage: Windows & macOS
//! Currently unsupported.
//!
//! ## `thcon.toml` Schema
//! Section: `gnome-shell`
//!
//! | Key | Type | Description | Default |
//! | --- | ---- | ----------- | ------- |
//! | `disabled` | boolean | `true` to disable theming of this app, otherwise `false` | `false` |
//! | `dark` | string | The name of the theme (case-sensitive) to apply in dark mode | (none) |
//! | `light` | string | The name of the theme (case-sensitive) to apply in light mode | (none) |
//!

use crate::config::Config as ThconConfig;
use crate::operation::Operation;
use crate::themeable::{ConfigError, ConfigState, Themeable};
use crate::AppConfig;
use crate::Disableable;

use anyhow::{Context, Result};
use gio::SettingsExt;
use serde::Deserialize;

#[derive(Debug, Deserialize, Disableable, AppConfig)]
pub struct _Config {
    light: String,
    dark: String,
    #[serde(default)]
    disabled: bool,
}

pub struct GnomeShell {}

impl Themeable for GnomeShell {
    fn config_state(&self, config: &ThconConfig) -> ConfigState {
        ConfigState::with_manual_config(config.gnome_shell.as_ref().map(|c| c.inner.as_ref()))
    }

    fn switch(&self, config: &ThconConfig, operation: &Operation) -> Result<()> {
        let config = match self.config_state(config) {
            ConfigState::NoDefault => {
                return Err(ConfigError::RequiresManualConfig("gnome_shell").into())
            }
            ConfigState::Default => unreachable!(),
            ConfigState::Disabled => return Ok(()),
            ConfigState::Enabled => config.gnome_shell.as_ref().unwrap().unwrap_inner_left(),
        };

        let theme = match operation {
            Operation::Darken => &config.dark,
            Operation::Lighten => &config.light,
        };

        let gsettings = gio::Settings::new("org.gnome.shell.extensions.user-theme");
        gsettings
            .set_string("name", theme)
            .map(|_| gio::Settings::sync())
            .with_context(|| format!("Unable to apply GNOME Shell user theme '{}'", theme))
    }
}