use KDL instead of TOML

Cargo.lock

@@ -2,40 +2,74 @@
 # It is not intended for manual editing.
 version = 4
 
-[[package]]
-name = "equivalent"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
-
-[[package]]
-name = "hashbrown"
-version = "0.15.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf151400ff0baff5465007dd2f3e717f3fe502074ca563069ce3a6629d07b289"
-
-[[package]]
-name = "indexmap"
-version = "2.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62f822373a4fe84d4bb149bf54e584a7f4abec90e072ed49cda0edea5b95471f"
-dependencies = [
- "equivalent",
- "hashbrown",
-]
-
 [[package]]
 name = "itoa"
 version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
 
+[[package]]
+name = "kdl"
+version = "4.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e03e2e96c5926fe761088d66c8c2aee3a4352a2573f4eaca50043ad130af9117"
+dependencies = [
+ "miette",
+ "nom",
+ "thiserror",
+]
+
 [[package]]
 name = "memchr"
 version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
+[[package]]
+name = "miette"
+version = "5.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59bb584eaeeab6bd0226ccf3509a69d7936d148cf3d036ad350abe35e8c6856e"
+dependencies = [
+ "miette-derive",
+ "once_cell",
+ "thiserror",
+ "unicode-width",
+]
+
+[[package]]
+name = "miette-derive"
+version = "5.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49e7bc1560b95a3c4a25d03de42fe76ca718ab92d1a22a55b9b4cf67b3ae635c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.92"
@@ -92,22 +126,13 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_spanned"
-version = "0.6.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87607cb1398ed59d48732e575a4c28a7a8ebf2454b964fe3f224f2afc07909e1"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "swayout"
 version = "1.0.0"
 dependencies = [
+ "kdl",
  "serde",
  "serde_json",
- "toml",
  "xdg",
 ]
 
@@ -123,37 +148,23 @@ dependencies = [
 ]
 
 [[package]]
-name = "toml"
+name = "thiserror"
-version = "0.8.19"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1ed1f98e3fdc28d6d910e6737ae6ab1a93bf1985935a1193e68f93eeb68d24e"
+checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
 dependencies = [
- "serde",
+ "thiserror-impl",
- "serde_spanned",
- "toml_datetime",
- "toml_edit",
 ]
 
 [[package]]
-name = "toml_datetime"
+name = "thiserror-impl"
-version = "0.6.8"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0dd7358ecb8fc2f8d014bf86f6f638ce72ba252a2c3a2572f2a795f1d23efb41"
+checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
 dependencies = [
- "serde",
+ "proc-macro2",
-]
+ "quote",
-
+ "syn",
-[[package]]
-name = "toml_edit"
-version = "0.22.22"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ae48d6208a266e853d946088ed816055e556cc6028c5e8e2b84d9fa5dd7c7f5"
-dependencies = [
- "indexmap",
- "serde",
- "serde_spanned",
- "toml_datetime",
- "winnow",
 ]
 
 [[package]]
@@ -163,13 +174,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
 
 [[package]]
-name = "winnow"
+name = "unicode-width"
-version = "0.6.20"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36c1fec1a2bb5866f07c25f68c26e565c4c200aebb96d7e55710c19d3e8ac49b"
+checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
-dependencies = [
- "memchr",
-]
 
 [[package]]
 name = "xdg"

Cargo.toml

@@ -8,11 +8,11 @@ authors = ["Stephen Byrne"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-# for config yaml
-serde = { version = "1.0", features = ["derive"] }
-toml = "0.8.19"
-
 # for json output from swaymsg
+serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0.133"
 
+# for config file
+kdl = "4.7.1"
+
 xdg = "2.5.2"

README.md

@@ -5,55 +5,35 @@
 [kanshi](https://sr.ht/~emersion/kanshi/) and [way-displays](https://github.com/alex-courtis/way-displays) certainly
 do a better job of this. I wrote this because I wanted a project to learn Rust.
 
-Monitors and layouts are configured in a toml file
+Monitors and layouts are configured in a [KDL](https://kdl.dev) file
-(`~/.config/swayout/config.toml`).
+(`~/.config/swayout/config.kdl`).
 
-Example `config.toml`:
+Example `config.kdl`:
 
-```toml
+```kdl
-# This is my laptop's built-in screen.
+// This is my laptop's built-in screen.
-[monitors.laptop]
+monitor "laptop" make="Unknown" model="0x403D" serial="0x00000000"
-make = "Unknown"
-model = "0x403D"
-serial = "0x00000000"
 
-# I usually have it hooked up to this monitor, which is the top one on my desk.
+// I usually have it hooked up to this monitor, which is the top one on my desk.
-[monitors.top]
+monitor "top" make="Dell Inc." model="DELL U2415" serial="CFV9N99T0Y0U"
-make = "Dell Inc."
-model = "DELL U2415"
-serial = "CFV9N99T0Y0U"
 
-# Sometimes I hook it up to these monitors, which are left and right.
+// Sometimes I hook it up to these monitors, which are left and right.
-# The left is rotated 270 degrees.
+// The left is in portrait.
-[monitors.left]
+monitor "left" make="Goldstar Company Ltd" model="LG HDR 4K" serial="0x0000B9C0"
-make = "Goldstar Company Ltd"
+monitor "right" make="Goldstar Company Ltd" model="LG HDR 4K" serial="0x0000B9BF"
-model = "LG HDR 4K"
-serial = "0x0000B9C0"
-[monitors.right]
-make = "Goldstar Company Ltd"
-model = "LG HDR 4K"
-serial = "0x0000B9BF"
 
-# When I have "left" and "right" hooked up, I want this layout.
+// When I have "left" and "right" hooked up, I want this layout.
-[layouts.two4k.left]
+layout "two4k" {
-mode = "3840x2160"
+    output "left" mode="3840x2160" scale="1.5" x=0 y=0 transform="270"
-scale = "1.5"
+    output "right" mode="3840x2160" scale="1.5" x=1440 y=1120 transform="normal"
-x = 0
+}
-y = 0
-transform = "270"
-[layouts.two4k.right]
-mode = "3840x2160"
-scale = "1.5"
-x = 1440
-y = 1120
-transform = "normal"
 ```
 
 When you run `swayout`, it prints all available layout names to standard output, one per line.
 Printed layouts include:
 
-* All layouts defined in `config.toml` for which the monitors are currently available. E.g.: `two4k`.
+* All layouts defined in `config.kdl` for which the monitors are currently available. E.g.: `two4k`.
-* All monitors defined in `config.toml` that are currently available. E.g.: `laptop`, `left`, `right`.
+* All monitors defined in `config.kdl` that are currently available. E.g.: `laptop`, `left`, `right`.
 * All available outputs that are not matched by a configured monitor. E.g.: `HDMI-2`.
 
 If you pass a layout name (or monitor name, or output name) as a command line argument to `swayout`,

src/main.rs

@@ -1,4 +1,4 @@
-use serde::{Deserialize, Serialize};
+use kdl::KdlDocument;
 use serde_json::{from_str, Value};
 use std::collections::HashMap;
 use std::env;
@@ -6,7 +6,6 @@ use std::process::Command;
 use std::{fs, str};
 
 /// Configuration for swayout.
-#[derive(Serialize, Deserialize, Debug)]
 struct Config {
     /// Monitor name is independent of output name. It can be anything.
     monitors: HashMap<String, Monitor>,
@@ -16,15 +15,15 @@ struct Config {
     /// Available outputs that do not match a monitor in the map are disabled.
     layouts: HashMap<String, HashMap<String, OutputConfig>>,
 }
+
 /// Defines a monitor by make, model, and serial.
-#[derive(Serialize, Deserialize, Debug)]
 struct Monitor {
     make: String,
     model: String,
     serial: String,
 }
+
 /// Configuration for an enabled output.
-#[derive(Serialize, Deserialize, Debug)]
 struct OutputConfig {
     /// mode. See man 5 sway-output
     mode: String,
@@ -112,13 +111,13 @@ fn get_mode(output: &Value) -> String {
     }
 }
 
-/// Get a `Config` from ~/.config/swayout/config.toml.
+/// Get a `Config` from ~/.config/swayout/config.kdl.
 /// (It really uses XDG config dirs.)
 fn get_config() -> Config {
     let xdg_dirs = xdg::BaseDirectories::with_prefix("swayout").unwrap();
-    if let Some(path) = xdg_dirs.find_config_file("config.toml") {
+    if let Some(path) = xdg_dirs.find_config_file("config.kdl") {
-        let toml = fs::read_to_string(path).expect("error reading file");
+        let kdl = fs::read_to_string(path).expect("error reading file");
-        toml::from_str(&toml).expect("toml parse error")
+        parse_config(kdl)
     } else {
         // no config files, use an empty rules
         Config {
@@ -127,6 +126,46 @@ fn get_config() -> Config {
         }
     }
 }
+fn parse_config(kdl:String) -> Config {
+    let doc:KdlDocument = kdl.parse().expect("failed to parse config KDL");
+
+    let monitors:HashMap<String,Monitor> = doc.nodes().iter()
+        .filter(|node| node.name().value() == "monitor")
+        .map(|monitor_node| {
+            let name = String::from(monitor_node[0].as_string().unwrap());
+            let monitor = Monitor {
+                make : String::from(monitor_node["make"].as_string().unwrap()),
+                model : String::from(monitor_node["model"].as_string().unwrap()),
+                serial : String::from(monitor_node["serial"].as_string().unwrap()),
+            };
+            (name, monitor)
+        })
+        .collect();
+
+    let layouts:HashMap<String,HashMap<String,OutputConfig>> = doc.nodes().iter()
+        .filter(|node| node.name().value() == "layout")
+        .map(|layout_node| {
+            let layout_name = String::from(layout_node[0].as_string().unwrap());
+            let monitor_name_to_output_config:HashMap<String,OutputConfig> = layout_node
+                .children().unwrap().nodes().iter()
+                .map(|output_node| {
+                    let output = String::from(output_node[0].as_string().unwrap());
+                    let output_config = OutputConfig {
+                        mode : String::from(output_node["mode"].as_string().unwrap()),
+                        scale : String::from(output_node["scale"].as_string().unwrap()),
+                        transform : String::from(output_node["transform"].as_string().unwrap()),
+                        x : output_node["x"].as_i64().unwrap() as u16,
+                        y : output_node["y"].as_i64().unwrap() as u16,
+                    };
+                    (output, output_config)
+                })
+                .collect();
+            (layout_name,monitor_name_to_output_config)
+        })
+        .collect();
+
+    Config { monitors, layouts }
+}
 
 /// Determine the available layout names.
 /// Return one layout for each layout defined in the configuration file
@@ -135,12 +174,10 @@ fn get_config() -> Config {
 /// and one for each available output that is not a configured monitor (for using just that output).
 fn get_layouts() -> Vec<String> {
     let available_outputs = get_outputs();
-    let rules = get_config();
+    let config = get_config();
-
-    let mut layout_names: Vec<String> = Vec::new();
 
     // Get the names of monitors that are available (that match an available output)
-    let available_monitor_names:Vec<&String> = rules.monitors.iter()
+    let available_monitor_names:Vec<&String> = config.monitors.iter()
         .filter(|(_monitor_name,monitor)|
             available_outputs.iter().any(|output|
                 monitor.make == output.make
@@ -151,8 +188,10 @@ fn get_layouts() -> Vec<String> {
         .map(|(monitor_name,_monitor)| monitor_name)
         .collect();
 
+    let mut layout_names: Vec<String> = Vec::new();
+
     // Add each layout defined in the config file for which all outputs are available
-    rules.layouts.iter().for_each(|(layout_name, layout)| {
+    config.layouts.iter().for_each(|(layout_name, layout)| {
         if layout
             .iter()
             .all(|(output_name, _output)| available_monitor_names.contains(&output_name))
@@ -164,7 +203,7 @@ fn get_layouts() -> Vec<String> {
     // add each individual output (by monitor name if the monitor is defined, else by output name)
     available_outputs.iter().for_each(|output| {
         // if there is a monitor for the output, use the monitor name, else use the output name
-        let monitor_opt = rules.monitors.iter()
+        let monitor_opt = config.monitors.iter()
             .find(|(_monitor_name, monitor)| {
                 monitor.make == output.make
                     && monitor.model == output.model