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//! The TOML config. Parsing and validation only, the compositor applies it.

use monolith_ipc::Command;
use regex::Regex;
use serde::Deserialize;
use std::collections::BTreeMap;
use std::fmt;
use std::path::{Path, PathBuf};

pub const DEFAULT: &str = include_str!("../default.toml");

#[derive(Debug, Clone)]
pub struct Config {
    pub general: General,
    pub output: Outputs,
    pub decoration: Decoration,
    pub animation: Animation,
    pub keyboard: Keyboard,
    pub binds: Vec<Bind>,
    pub rules: Vec<Rule>,
    pub startup: Vec<Vec<String>>,
}

#[derive(Deserialize, Debug, Clone, PartialEq)]
#[serde(default, deny_unknown_fields)]
pub struct General {
    /// What `Mod` means in binds.
    #[serde(rename = "mod")]
    pub mod_key: Modifier,
    pub gaps: Gaps,
    /// What a window move does when it meets a neighbour.
    #[serde(rename = "move")]
    pub move_mode: MoveMode,
}

#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq, Default)]
#[serde(rename_all = "lowercase")]
pub enum MoveMode {
    /// Trade places with it.
    #[default]
    Swap,
    /// Join its lane, stacking with it if it is alone.
    Merge,
}

impl Default for General {
    fn default() -> Self {
        Self {
            mod_key: Modifier::Super,
            gaps: Gaps::default(),
            move_mode: MoveMode::Swap,
        }
    }
}

#[derive(Deserialize, Debug, Clone, Copy, PartialEq)]
#[serde(default, deny_unknown_fields)]
pub struct Gaps {
    pub inner: f64,
    pub outer: f64,
}

impl Default for Gaps {
    fn default() -> Self {
        Self {
            inner: 8.0,
            outer: 8.0,
        }
    }
}

#[derive(Deserialize, Debug, Clone, PartialEq, Default)]
#[serde(default, deny_unknown_fields)]
pub struct Outputs {
    pub vrr: Vrr,
}

#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq, Default)]
#[serde(rename_all = "lowercase")]
pub enum Vrr {
    Off,
    On,
    /// Only while a fullscreen window is shown, where a game sets the pace.
    #[default]
    Fullscreen,
}

#[derive(Deserialize, Debug, Clone, PartialEq)]
#[serde(default, deny_unknown_fields)]
pub struct Decoration {
    /// Border width in logical pixels, drawn in the gap around each window.
    pub border: u32,
    pub focused: Color,
    pub unfocused: Color,
}

impl Default for Decoration {
    fn default() -> Self {
        Self {
            border: 2,
            focused: Color::rgb(0x88, 0xbf, 0xd1),
            unfocused: Color::rgb(0x3b, 0x42, 0x52),
        }
    }
}

/// Straight RGBA from `#rrggbb` or `#rrggbbaa`.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Color(pub [f32; 4]);

impl Color {
    pub const fn rgb(r: u8, g: u8, b: u8) -> Self {
        Self([r as f32 / 255.0, g as f32 / 255.0, b as f32 / 255.0, 1.0])
    }
}

impl<'de> Deserialize<'de> for Color {
    fn deserialize<D: serde::Deserializer<'de>>(d: D) -> Result<Self, D::Error> {
        let s = String::deserialize(d)?;
        let hex = s.strip_prefix('#').unwrap_or(&s);
        let bad =
            || serde::de::Error::custom(format!("bad colour {s:?}, use #rrggbb or #rrggbbaa"));
        if !matches!(hex.len(), 6 | 8) || !hex.is_ascii() {
            return Err(bad());
        }
        let mut c = [1.0f32; 4];
        for (i, v) in c.iter_mut().enumerate().take(hex.len() / 2) {
            let byte = u8::from_str_radix(&hex[i * 2..i * 2 + 2], 16).map_err(|_| bad())?;
            *v = f32::from(byte) / 255.0;
        }
        Ok(Self(c))
    }
}

#[derive(Deserialize, Debug, Clone, PartialEq)]
#[serde(default, deny_unknown_fields)]
pub struct Animation {
    pub enabled: bool,
    pub style: AnimationStyle,
    /// Every phase of a planned transition lasts this long.
    pub phase_ms: u64,
    /// A cubic bezier, as in CSS.
    pub curve: [f64; 4],
}

impl Default for Animation {
    fn default() -> Self {
        Self {
            enabled: true,
            style: AnimationStyle::Orthogonal,
            phase_ms: 160,
            curve: [0.45, 0.0, 0.2, 1.0],
        }
    }
}

#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
#[serde(rename_all = "lowercase")]
pub enum AnimationStyle {
    Orthogonal,
    Direct,
}

#[derive(Deserialize, Debug, Clone, PartialEq)]
#[serde(default, deny_unknown_fields)]
pub struct Keyboard {
    pub rules: String,
    pub model: String,
    pub layout: String,
    pub variant: String,
    pub options: Option<String>,
    pub repeat_delay: i32,
    pub repeat_rate: i32,
}

impl Default for Keyboard {
    fn default() -> Self {
        Self {
            rules: String::new(),
            model: String::new(),
            layout: String::new(),
            variant: String::new(),
            options: None,
            repeat_delay: 200,
            repeat_rate: 25,
        }
    }
}

#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
#[serde(rename_all = "lowercase")]
pub enum Modifier {
    Super,
    Alt,
    Ctrl,
    Shift,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Hash)]
pub struct Mods {
    pub logo: bool,
    pub alt: bool,
    pub ctrl: bool,
    pub shift: bool,
}

impl Mods {
    pub fn has(&self, m: Modifier) -> bool {
        match m {
            Modifier::Super => self.logo,
            Modifier::Alt => self.alt,
            Modifier::Ctrl => self.ctrl,
            Modifier::Shift => self.shift,
        }
    }

    fn set(&mut self, m: Modifier) {
        match m {
            Modifier::Super => self.logo = true,
            Modifier::Alt => self.alt = true,
            Modifier::Ctrl => self.ctrl = true,
            Modifier::Shift => self.shift = true,
        }
    }
}

#[derive(Debug, Clone, PartialEq)]
pub struct Bind {
    pub mods: Mods,
    /// An xkb keysym name, resolved by the compositor.
    pub key: String,
    pub command: Command,
}

#[derive(Debug, Clone)]
pub struct Rule {
    pub app_id: Option<Regex>,
    pub title: Option<Regex>,
    pub tag: Option<String>,
    pub output: Option<String>,
    pub floating: Option<bool>,
    pub sticky: Option<bool>,
    pub scratchpad: Option<String>,
}

/// Everything the matching rules say about a window, later rules winning.
#[derive(Debug, Clone, Default, PartialEq)]
pub struct Placement {
    pub tag: Option<String>,
    pub output: Option<String>,
    pub floating: Option<bool>,
    pub sticky: Option<bool>,
    pub scratchpad: Option<String>,
}

#[derive(Debug)]
pub enum Error {
    Io(PathBuf, std::io::Error),
    Toml(toml::de::Error),
    Bind(String, String),
    Regex(String, regex::Error),
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Error::Io(p, e) => write!(f, "{}: {e}", p.display()),
            Error::Toml(e) => write!(f, "{e}"),
            Error::Bind(k, e) => write!(f, "bind {k:?}: {e}"),
            Error::Regex(r, e) => write!(f, "rule pattern {r:?}: {e}"),
        }
    }
}

impl std::error::Error for Error {}

#[derive(Deserialize)]
#[serde(deny_unknown_fields)]
struct Raw {
    #[serde(default)]
    startup: Vec<Vec<String>>,
    #[serde(default)]
    general: General,
    #[serde(default)]
    keyboard: Keyboard,
    #[serde(default)]
    animation: Animation,
    #[serde(default)]
    decoration: Decoration,
    #[serde(default)]
    output: Outputs,
    #[serde(default)]
    binds: BTreeMap<String, Words>,
    #[serde(default)]
    rules: Vec<RawRule>,
}

#[derive(Deserialize)]
#[serde(untagged)]
enum Words {
    Line(String),
    List(Vec<String>),
}

#[derive(Deserialize)]
#[serde(deny_unknown_fields)]
struct RawRule {
    app_id: Option<String>,
    title: Option<String>,
    tag: Option<String>,
    output: Option<String>,
    floating: Option<bool>,
    sticky: Option<bool>,
    scratchpad: Option<String>,
}

impl Config {
    /// `$MONOLITH_CONFIG`, else `$XDG_CONFIG_HOME/monolith/config.toml`.
    pub fn path() -> Option<PathBuf> {
        if let Some(p) = std::env::var_os("MONOLITH_CONFIG") {
            return Some(p.into());
        }
        let base = std::env::var_os("XDG_CONFIG_HOME")
            .map(PathBuf::from)
            .or_else(|| std::env::var_os("HOME").map(|h| PathBuf::from(h).join(".config")))?;
        Some(base.join("monolith/config.toml"))
    }

    /// Loads `path`, or the built-in default when it does not exist.
    pub fn load(path: Option<&Path>) -> Result<Self, Error> {
        match path {
            Some(p) => match std::fs::read_to_string(p) {
                Ok(text) => Self::parse(&text),
                Err(e) if e.kind() == std::io::ErrorKind::NotFound => Self::parse(DEFAULT),
                Err(e) => Err(Error::Io(p.to_owned(), e)),
            },
            None => Self::parse(DEFAULT),
        }
    }

    pub fn parse(text: &str) -> Result<Self, Error> {
        let raw: Raw = toml::from_str(text).map_err(Error::Toml)?;
        let mod_key = raw.general.mod_key;
        let binds = raw
            .binds
            .into_iter()
            .map(|(combo, words)| parse_bind(&combo, words, mod_key))
            .collect::<Result<_, _>>()?;
        let regex = |p: Option<String>| {
            p.map(|p| Regex::new(&p).map_err(|e| Error::Regex(p, e)))
                .transpose()
        };
        let rules = raw
            .rules
            .into_iter()
            .map(|r| {
                Ok(Rule {
                    app_id: regex(r.app_id)?,
                    title: regex(r.title)?,
                    tag: r.tag,
                    output: r.output,
                    floating: r.floating,
                    sticky: r.sticky,
                    scratchpad: r.scratchpad,
                })
            })
            .collect::<Result<_, Error>>()?;
        Ok(Self {
            general: raw.general,
            animation: raw.animation,
            decoration: raw.decoration,
            output: raw.output,
            keyboard: raw.keyboard,
            binds,
            rules,
            startup: raw.startup,
        })
    }

    pub fn placement(&self, app_id: &str, title: &str) -> Placement {
        let mut p = Placement::default();
        let hit = |re: &Option<Regex>, s: &str| re.as_ref().is_none_or(|re| re.is_match(s));
        for r in &self.rules {
            if !hit(&r.app_id, app_id) || !hit(&r.title, title) {
                continue;
            }
            p.tag = r.tag.clone().or(p.tag);
            p.output = r.output.clone().or(p.output);
            p.floating = r.floating.or(p.floating);
            p.sticky = r.sticky.or(p.sticky);
            p.scratchpad = r.scratchpad.clone().or(p.scratchpad);
        }
        p
    }
}

fn parse_bind(combo: &str, words: Words, mod_key: Modifier) -> Result<Bind, Error> {
    let bad = |m: String| Error::Bind(combo.to_owned(), m);
    let parts: Vec<&str> = combo.split('+').map(str::trim).collect();
    let Some((&key, mods)) = parts.split_last().filter(|(k, _)| !k.is_empty()) else {
        return Err(bad("no key".into()));
    };
    let mut set = Mods::default();
    for m in mods {
        let m = match m.to_ascii_lowercase().as_str() {
            "mod" => mod_key,
            "super" | "logo" | "win" => Modifier::Super,
            "alt" => Modifier::Alt,
            "ctrl" | "control" => Modifier::Ctrl,
            "shift" => Modifier::Shift,
            other => return Err(bad(format!("unknown modifier {other}"))),
        };
        set.set(m);
    }
    let words: Vec<String> = match words {
        Words::Line(s) => s.split_whitespace().map(str::to_owned).collect(),
        Words::List(v) => v,
    };
    let command = Command::parse(&words).map_err(|e| bad(e.0))?;
    Ok(Bind {
        mods: set,
        key: key.to_owned(),
        command,
    })
}

#[cfg(test)]
mod tests {
    use super::*;

    /// default.toml documents the defaults for users, and the Default impls
    /// apply them to sections a user config leaves out. They must agree.
    #[test]
    fn default_toml_states_the_defaults() {
        let c = Config::parse(DEFAULT).unwrap();
        assert_eq!(c.general, General::default());
        assert_eq!(c.output, Outputs::default());
        assert_eq!(c.decoration, Decoration::default());
        assert_eq!(c.animation, Animation::default());
        assert_eq!(c.keyboard, Keyboard::default());
        assert!(c.binds.len() > 40);
    }
}

1	//! The TOML config. Parsing and validation only, the compositor applies it.
2
3	use monolith_ipc::Command;
4	use regex::Regex;
5	use serde::Deserialize;
6	use std::collections::BTreeMap;
7	use std::fmt;
8	use std::path::{Path, PathBuf};
9
10	pub const DEFAULT: &str = include_str!("../default.toml");
11
12	#[derive(Debug, Clone)]
13	pub struct Config {
14	pub general: General,
15	pub output: Outputs,
16	pub decoration: Decoration,
17	pub animation: Animation,
18	pub keyboard: Keyboard,
19	pub binds: Vec<Bind>,
20	pub rules: Vec<Rule>,
21	pub startup: Vec<Vec<String>>,
22	}
23
24	#[derive(Deserialize, Debug, Clone, PartialEq)]
25	#[serde(default, deny_unknown_fields)]
26	pub struct General {
27	/// What `Mod` means in binds.
28	#[serde(rename = "mod")]
29	pub mod_key: Modifier,
30	pub gaps: Gaps,
31	/// What a window move does when it meets a neighbour.
32	#[serde(rename = "move")]
33	pub move_mode: MoveMode,
34	}
35
36	#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq, Default)]
37	#[serde(rename_all = "lowercase")]
38	pub enum MoveMode {
39	/// Trade places with it.
40	#[default]
41	Swap,
42	/// Join its lane, stacking with it if it is alone.
43	Merge,
44	}
45
46	impl Default for General {
47	fn default() -> Self {
48	Self {
49	mod_key: Modifier::Super,
50	gaps: Gaps::default(),
51	move_mode: MoveMode::Swap,
52	}
53	}
54	}
55
56	#[derive(Deserialize, Debug, Clone, Copy, PartialEq)]
57	#[serde(default, deny_unknown_fields)]
58	pub struct Gaps {
59	pub inner: f64,
60	pub outer: f64,
61	}
62
63	impl Default for Gaps {
64	fn default() -> Self {
65	Self {
66	inner: 8.0,
67	outer: 8.0,
68	}
69	}
70	}
71
72	#[derive(Deserialize, Debug, Clone, PartialEq, Default)]
73	#[serde(default, deny_unknown_fields)]
74	pub struct Outputs {
75	pub vrr: Vrr,
76	}
77
78	#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq, Default)]
79	#[serde(rename_all = "lowercase")]
80	pub enum Vrr {
81	Off,
82	On,
83	/// Only while a fullscreen window is shown, where a game sets the pace.
84	#[default]
85	Fullscreen,
86	}
87
88	#[derive(Deserialize, Debug, Clone, PartialEq)]
89	#[serde(default, deny_unknown_fields)]
90	pub struct Decoration {
91	/// Border width in logical pixels, drawn in the gap around each window.
92	pub border: u32,
93	pub focused: Color,
94	pub unfocused: Color,
95	}
96
97	impl Default for Decoration {
98	fn default() -> Self {
99	Self {
100	border: 2,
101	focused: Color::rgb(0x88, 0xbf, 0xd1),
102	unfocused: Color::rgb(0x3b, 0x42, 0x52),
103	}
104	}
105	}
106
107	/// Straight RGBA from `#rrggbb` or `#rrggbbaa`.
108	#[derive(Debug, Clone, Copy, PartialEq)]
109	pub struct Color(pub [f32; 4]);
110
111	impl Color {
112	pub const fn rgb(r: u8, g: u8, b: u8) -> Self {
113	Self([r as f32 / 255.0, g as f32 / 255.0, b as f32 / 255.0, 1.0])
114	}
115	}
116
117	impl<'de> Deserialize<'de> for Color {
118	fn deserialize<D: serde::Deserializer<'de>>(d: D) -> Result<Self, D::Error> {
119	let s = String::deserialize(d)?;
120	let hex = s.strip_prefix('#').unwrap_or(&s);
121	let bad =
122	\|\| serde::de::Error::custom(format!("bad colour {s:?}, use #rrggbb or #rrggbbaa"));
123	if !matches!(hex.len(), 6 \| 8) \|\| !hex.is_ascii() {
124	return Err(bad());
125	}
126	let mut c = [1.0f32; 4];
127	for (i, v) in c.iter_mut().enumerate().take(hex.len() / 2) {
128	let byte = u8::from_str_radix(&hex[i * 2..i * 2 + 2], 16).map_err(\|_\| bad())?;
129	*v = f32::from(byte) / 255.0;
130	}
131	Ok(Self(c))
132	}
133	}
134
135	#[derive(Deserialize, Debug, Clone, PartialEq)]
136	#[serde(default, deny_unknown_fields)]
137	pub struct Animation {
138	pub enabled: bool,
139	pub style: AnimationStyle,
140	/// Every phase of a planned transition lasts this long.
141	pub phase_ms: u64,
142	/// A cubic bezier, as in CSS.
143	pub curve: [f64; 4],
144	}
145
146	impl Default for Animation {
147	fn default() -> Self {
148	Self {
149	enabled: true,
150	style: AnimationStyle::Orthogonal,
151	phase_ms: 160,
152	curve: [0.45, 0.0, 0.2, 1.0],
153	}
154	}
155	}
156
157	#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
158	#[serde(rename_all = "lowercase")]
159	pub enum AnimationStyle {
160	Orthogonal,
161	Direct,
162	}
163
164	#[derive(Deserialize, Debug, Clone, PartialEq)]
165	#[serde(default, deny_unknown_fields)]
166	pub struct Keyboard {
167	pub rules: String,
168	pub model: String,
169	pub layout: String,
170	pub variant: String,
171	pub options: Option<String>,
172	pub repeat_delay: i32,
173	pub repeat_rate: i32,
174	}
175
176	impl Default for Keyboard {
177	fn default() -> Self {
178	Self {
179	rules: String::new(),
180	model: String::new(),
181	layout: String::new(),
182	variant: String::new(),
183	options: None,
184	repeat_delay: 200,
185	repeat_rate: 25,
186	}
187	}
188	}
189
190	#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
191	#[serde(rename_all = "lowercase")]
192	pub enum Modifier {
193	Super,
194	Alt,
195	Ctrl,
196	Shift,
197	}
198
199	#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Hash)]
200	pub struct Mods {
201	pub logo: bool,
202	pub alt: bool,
203	pub ctrl: bool,
204	pub shift: bool,
205	}
206
207	impl Mods {
208	pub fn has(&self, m: Modifier) -> bool {
209	match m {
210	Modifier::Super => self.logo,
211	Modifier::Alt => self.alt,
212	Modifier::Ctrl => self.ctrl,
213	Modifier::Shift => self.shift,
214	}
215	}
216
217	fn set(&mut self, m: Modifier) {
218	match m {
219	Modifier::Super => self.logo = true,
220	Modifier::Alt => self.alt = true,
221	Modifier::Ctrl => self.ctrl = true,
222	Modifier::Shift => self.shift = true,
223	}
224	}
225	}
226
227	#[derive(Debug, Clone, PartialEq)]
228	pub struct Bind {
229	pub mods: Mods,
230	/// An xkb keysym name, resolved by the compositor.
231	pub key: String,
232	pub command: Command,
233	}
234
235	#[derive(Debug, Clone)]
236	pub struct Rule {
237	pub app_id: Option<Regex>,
238	pub title: Option<Regex>,
239	pub tag: Option<String>,
240	pub output: Option<String>,
241	pub floating: Option<bool>,
242	pub sticky: Option<bool>,
243	pub scratchpad: Option<String>,
244	}
245
246	/// Everything the matching rules say about a window, later rules winning.
247	#[derive(Debug, Clone, Default, PartialEq)]
248	pub struct Placement {
249	pub tag: Option<String>,
250	pub output: Option<String>,
251	pub floating: Option<bool>,
252	pub sticky: Option<bool>,
253	pub scratchpad: Option<String>,
254	}
255
256	#[derive(Debug)]
257	pub enum Error {
258	Io(PathBuf, std::io::Error),
259	Toml(toml::de::Error),
260	Bind(String, String),
261	Regex(String, regex::Error),
262	}
263
264	impl fmt::Display for Error {
265	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
266	match self {
267	Error::Io(p, e) => write!(f, "{}: {e}", p.display()),
268	Error::Toml(e) => write!(f, "{e}"),
269	Error::Bind(k, e) => write!(f, "bind {k:?}: {e}"),
270	Error::Regex(r, e) => write!(f, "rule pattern {r:?}: {e}"),
271	}
272	}
273	}
274
275	impl std::error::Error for Error {}
276
277	#[derive(Deserialize)]
278	#[serde(deny_unknown_fields)]
279	struct Raw {
280	#[serde(default)]
281	startup: Vec<Vec<String>>,
282	#[serde(default)]
283	general: General,
284	#[serde(default)]
285	keyboard: Keyboard,
286	#[serde(default)]
287	animation: Animation,
288	#[serde(default)]
289	decoration: Decoration,
290	#[serde(default)]
291	output: Outputs,
292	#[serde(default)]
293	binds: BTreeMap<String, Words>,
294	#[serde(default)]
295	rules: Vec<RawRule>,
296	}
297
298	#[derive(Deserialize)]
299	#[serde(untagged)]
300	enum Words {
301	Line(String),
302	List(Vec<String>),
303	}
304
305	#[derive(Deserialize)]
306	#[serde(deny_unknown_fields)]
307	struct RawRule {
308	app_id: Option<String>,
309	title: Option<String>,
310	tag: Option<String>,
311	output: Option<String>,
312	floating: Option<bool>,
313	sticky: Option<bool>,
314	scratchpad: Option<String>,
315	}
316
317	impl Config {
318	/// `$MONOLITH_CONFIG`, else `$XDG_CONFIG_HOME/monolith/config.toml`.
319	pub fn path() -> Option<PathBuf> {
320	if let Some(p) = std::env::var_os("MONOLITH_CONFIG") {
321	return Some(p.into());
322	}
323	let base = std::env::var_os("XDG_CONFIG_HOME")
324	.map(PathBuf::from)
325	.or_else(\|\| std::env::var_os("HOME").map(\|h\| PathBuf::from(h).join(".config")))?;
326	Some(base.join("monolith/config.toml"))
327	}
328
329	/// Loads `path`, or the built-in default when it does not exist.
330	pub fn load(path: Option<&Path>) -> Result<Self, Error> {
331	match path {
332	Some(p) => match std::fs::read_to_string(p) {
333	Ok(text) => Self::parse(&text),
334	Err(e) if e.kind() == std::io::ErrorKind::NotFound => Self::parse(DEFAULT),
335	Err(e) => Err(Error::Io(p.to_owned(), e)),
336	},
337	None => Self::parse(DEFAULT),
338	}
339	}
340
341	pub fn parse(text: &str) -> Result<Self, Error> {
342	let raw: Raw = toml::from_str(text).map_err(Error::Toml)?;
343	let mod_key = raw.general.mod_key;
344	let binds = raw
345	.binds
346	.into_iter()
347	.map(\|(combo, words)\| parse_bind(&combo, words, mod_key))
348	.collect::<Result<_, _>>()?;
349	let regex = \|p: Option<String>\| {
350	p.map(\|p\| Regex::new(&p).map_err(\|e\| Error::Regex(p, e)))
351	.transpose()
352	};
353	let rules = raw
354	.rules
355	.into_iter()
356	.map(\|r\| {
357	Ok(Rule {
358	app_id: regex(r.app_id)?,
359	title: regex(r.title)?,
360	tag: r.tag,
361	output: r.output,
362	floating: r.floating,
363	sticky: r.sticky,
364	scratchpad: r.scratchpad,
365	})
366	})
367	.collect::<Result<_, Error>>()?;
368	Ok(Self {
369	general: raw.general,
370	animation: raw.animation,
371	decoration: raw.decoration,
372	output: raw.output,
373	keyboard: raw.keyboard,
374	binds,
375	rules,
376	startup: raw.startup,
377	})
378	}
379
380	pub fn placement(&self, app_id: &str, title: &str) -> Placement {
381	let mut p = Placement::default();
382	let hit = \|re: &Option<Regex>, s: &str\| re.as_ref().is_none_or(\|re\| re.is_match(s));
383	for r in &self.rules {
384	if !hit(&r.app_id, app_id) \|\| !hit(&r.title, title) {
385	continue;
386	}
387	p.tag = r.tag.clone().or(p.tag);
388	p.output = r.output.clone().or(p.output);
389	p.floating = r.floating.or(p.floating);
390	p.sticky = r.sticky.or(p.sticky);
391	p.scratchpad = r.scratchpad.clone().or(p.scratchpad);
392	}
393	p
394	}
395	}
396
397	fn parse_bind(combo: &str, words: Words, mod_key: Modifier) -> Result<Bind, Error> {
398	let bad = \|m: String\| Error::Bind(combo.to_owned(), m);
399	let parts: Vec<&str> = combo.split('+').map(str::trim).collect();
400	let Some((&key, mods)) = parts.split_last().filter(\|(k, _)\| !k.is_empty()) else {
401	return Err(bad("no key".into()));
402	};
403	let mut set = Mods::default();
404	for m in mods {
405	let m = match m.to_ascii_lowercase().as_str() {
406	"mod" => mod_key,
407	"super" \| "logo" \| "win" => Modifier::Super,
408	"alt" => Modifier::Alt,
409	"ctrl" \| "control" => Modifier::Ctrl,
410	"shift" => Modifier::Shift,
411	other => return Err(bad(format!("unknown modifier {other}"))),
412	};
413	set.set(m);
414	}
415	let words: Vec<String> = match words {
416	Words::Line(s) => s.split_whitespace().map(str::to_owned).collect(),
417	Words::List(v) => v,
418	};
419	let command = Command::parse(&words).map_err(\|e\| bad(e.0))?;
420	Ok(Bind {
421	mods: set,
422	key: key.to_owned(),
423	command,
424	})
425	}
426
427	#[cfg(test)]
428	mod tests {
429	use super::*;
430
431	/// default.toml documents the defaults for users, and the Default impls
432	/// apply them to sections a user config leaves out. They must agree.
433	#[test]
434	fn default_toml_states_the_defaults() {
435	let c = Config::parse(DEFAULT).unwrap();
436	assert_eq!(c.general, General::default());
437	assert_eq!(c.output, Outputs::default());
438	assert_eq!(c.decoration, Decoration::default());
439	assert_eq!(c.animation, Animation::default());
440	assert_eq!(c.keyboard, Keyboard::default());
441	assert!(c.binds.len() > 40);
442	}
443	}