commit 2715f58991d1eb16edde699f7bba7332acd9a8d0
Author: Kalle Struik <kalle@kallestruik.nl>
Date:   Fri Jun 20 23:53:52 2025 +0200

    Initial prototype of overlay search box

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..cffc922
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake . --impure
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..87dca2e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/target
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diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..61ae164
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,776 @@
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+[[package]]
+name = "syn"
+version = "2.0.103"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4307e30089d6fd6aff212f2da3a1f9e32f3223b1f010fb09b7c95f90f3ca1e8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "system-deps"
+version = "7.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4be53aa0cba896d2dc615bd42bbc130acdcffa239e0a2d965ea5b3b2a86ffdb"
+dependencies = [
+ "cfg-expr",
+ "heck",
+ "pkg-config",
+ "toml",
+ "version-compare",
+]
+
+[[package]]
+name = "target-lexicon"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e502f78cdbb8ba4718f566c418c52bc729126ffd16baee5baa718cf25dd5a69a"
+
+[[package]]
+name = "toml"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
+dependencies = [
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_edit",
+]
+
+[[package]]
+name = "toml_datetime"
+version = "0.6.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22cddaf88f4fbc13c51aebbf5f8eceb5c7c5a9da2ac40a13519eb5b0a0e8f11c"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.22.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "winnow",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
+
+[[package]]
+name = "version-compare"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "852e951cb7832cb45cb1169900d19760cfa39b82bc0ea9c0e5a14ae88411c98b"
+
+[[package]]
+name = "windows-sys"
+version = "0.59.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "winnow"
+version = "0.7.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74c7b26e3480b707944fc872477815d29a8e429d2f93a1ce000f5fa84a15cbcd"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "xml-rs"
+version = "0.8.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a62ce76d9b56901b19a74f19431b0d8b3bc7ca4ad685a746dfd78ca8f4fc6bda"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..919d988
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "application-launcher"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+gtk = { package = "gtk4", version = "0.9.6" }
+gtk4-layer-shell = "0.5.0"
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..445a04e
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,248 @@
+{
+  "nodes": {
+    "cachix": {
+      "inputs": {
+        "devenv": [
+          "devenv"
+        ],
+        "flake-compat": [
+          "devenv"
+        ],
+        "git-hooks": [
+          "devenv",
+          "git-hooks"
+        ],
+        "nixpkgs": [
+          "devenv",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1748883665,
+        "narHash": "sha256-R0W7uAg+BLoHjMRMQ8+oiSbTq8nkGz5RDpQ+ZfxxP3A=",
+        "owner": "cachix",
+        "repo": "cachix",
+        "rev": "f707778d902af4d62d8dd92c269f8e70de09acbe",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "latest",
+        "repo": "cachix",
+        "type": "github"
+      }
+    },
+    "devenv": {
+      "inputs": {
+        "cachix": "cachix",
+        "flake-compat": "flake-compat",
+        "git-hooks": "git-hooks",
+        "nix": "nix",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1750437384,
+        "narHash": "sha256-3m00pI4ZdYDenFSKeWfMNjM0npdoHu5ssWRW+n577Fk=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "3bd127d022e00c6656440732a1839df6798ac946",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1747046372,
+        "narHash": "sha256-CIVLLkVgvHYbgI2UpXvIIBJ12HWgX+fjA8Xf8PUmqCY=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "9100a0f413b0c601e0533d1d94ffd501ce2e7885",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "devenv",
+          "nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1733312601,
+        "narHash": "sha256-4pDvzqnegAfRkPwO3wmwBhVi/Sye1mzps0zHWYnP88c=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "205b12d8b7cd4802fbcb8e8ef6a0f1408781a4f9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "git-hooks": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "flake-compat"
+        ],
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "devenv",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1749636823,
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "623c56286de5a3193aa38891a6991b28f9bab056",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "devenv",
+          "git-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "nix": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "flake-compat"
+        ],
+        "flake-parts": "flake-parts",
+        "git-hooks-nix": [
+          "devenv",
+          "git-hooks"
+        ],
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-23-11": [
+          "devenv"
+        ],
+        "nixpkgs-regression": [
+          "devenv"
+        ]
+      },
+      "locked": {
+        "lastModified": 1750117611,
+        "narHash": "sha256-LTwASICtyN3AjzlF9l2ZNAIVZqclio3yRcwwZy3QSJA=",
+        "owner": "cachix",
+        "repo": "nix",
+        "rev": "9e4fc95c388e2223d47da865503dee20d179776a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "devenv-2.30",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1747179050,
+        "narHash": "sha256-qhFMmDkeJX9KJwr5H32f1r7Prs7XbQWtO0h3V0a0rFY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "adaa24fbf46737f3f1b5497bf64bae750f82942e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1746807397,
+        "narHash": "sha256-zU2z0jlkJGWLhdNr/8AJSxqK8XD0IlQgHp3VZcP56Aw=",
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "c5208b594838ea8e6cca5997fbf784b7cca1ca90",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1750215678,
+        "narHash": "sha256-Rc/ytpamXRf6z8UA2SGa4aaWxUXRbX2MAWIu2C8M+ok=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "5395fb3ab3f97b9b7abca147249fa2e8ed27b192",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "nixpkgs": "nixpkgs_3",
+        "systems": "systems"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..37bb9b7
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,56 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    systems.url = "github:nix-systems/default";
+    devenv.url = "github:cachix/devenv";
+  };
+
+  nixConfig = {
+    extra-trusted-public-keys = "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=";
+    extra-substituters = "https://devenv.cachix.org";
+  };
+
+  outputs =
+    {
+      self,
+      systems,
+      nixpkgs,
+      devenv,
+      ...
+    }@inputs:
+    let
+      eachSystem = nixpkgs.lib.genAttrs (import systems);
+    in
+    {
+      packages = eachSystem (system: {
+        devenv-up = self.devShells.${system}.default.config.procfileScript;
+      });
+
+      devShells = eachSystem (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+        in
+        {
+          default = devenv.lib.mkShell {
+            inherit inputs pkgs;
+            modules = [
+              (
+                { pkgs, ... }:
+                {
+                  dotenv.disableHint = true;
+
+                  languages.rust.enable = true;
+
+                  packages = with pkgs; [
+                    gtk4
+                    gtk4-layer-shell
+                  ];
+                }
+              )
+            ];
+          };
+        }
+      );
+    };
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..6984adf
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,104 @@
+use gtk::{
+    CssProvider, EventControllerKey, Orientation,
+    gdk::{Display, Key},
+    glib,
+    prelude::*,
+};
+use gtk4_layer_shell::{Edge, Layer, LayerShell};
+
+const ITEMS: [&'static str; 3] = ["Test", "Example", "Placeholder"];
+
+fn main() -> glib::ExitCode {
+    let app = gtk::Application::builder()
+        .application_id("nl.kallestruik.application-launcher")
+        .build();
+    app.connect_startup(|_| load_css());
+    app.connect_activate(build_ui);
+    app.run()
+}
+
+fn build_ui(application: &gtk::Application) {
+    let window = gtk::ApplicationWindow::new(application);
+    window.set_title(Some("Application Launcher"));
+    window.init_layer_shell();
+    window.set_keyboard_mode(gtk4_layer_shell::KeyboardMode::Exclusive);
+    window.set_layer(Layer::Overlay);
+
+    // This centers the window
+    window.set_anchor(Edge::Top, false);
+    window.set_anchor(Edge::Right, false);
+    window.set_anchor(Edge::Bottom, false);
+    window.set_anchor(Edge::Left, false);
+
+    let container = gtk::Box::builder()
+        .orientation(Orientation::Vertical)
+        .spacing(6)
+        .build();
+    window.set_child(Some(&container));
+
+    let input = gtk::Entry::builder()
+        .css_classes(vec!["main-input"])
+        .placeholder_text("Start typing...")
+        .width_request(800)
+        .build();
+
+    container.append(&input);
+
+    let result_container = gtk::Box::builder()
+        .orientation(Orientation::Vertical)
+        .spacing(2)
+        .height_request(600)
+        .build();
+    container.append(&result_container);
+
+    input.connect_changed(glib::clone! {
+        #[weak]
+        result_container,
+        move |input| {
+            remove_all_children(&result_container);
+            let search: &str = &input.text().to_lowercase();
+            for item in ITEMS {
+                if item.to_lowercase().starts_with(&search) {
+                    let label = gtk::Label::new(Some(item));
+                    result_container.append(&label);
+                }
+            }
+            println!("{}", input.text());
+    }});
+
+    let event_controller = EventControllerKey::new();
+    event_controller.connect_key_pressed(|_, key, _, _| {
+        match key {
+            Key::Escape => {
+                std::process::exit(0);
+            }
+            _ => (),
+        }
+        glib::Propagation::Proceed
+    });
+
+    window.add_controller(event_controller);
+
+    window.show();
+}
+
+fn remove_all_children(b: &gtk::Box) {
+    let mut child = b.first_child();
+    while let Some(c) = child {
+        b.remove(&c);
+        child = b.first_child();
+    }
+}
+
+fn load_css() {
+    // Load the CSS file and add it to the provider
+    let provider = CssProvider::new();
+    provider.load_from_data(include_str!("style.css"));
+
+    // Add the provider to the default screen
+    gtk::style_context_add_provider_for_display(
+        &Display::default().expect("Could not connect to a display."),
+        &provider,
+        gtk::STYLE_PROVIDER_PRIORITY_APPLICATION,
+    );
+}
diff --git a/src/style.css b/src/style.css
new file mode 100644
index 0000000..866caab
--- /dev/null
+++ b/src/style.css
@@ -0,0 +1,7 @@
+.main-input {
+    font-size: 32px;
+}
+
+.main-input text {
+    margin: 8px;
+}