scrollback

.classpath

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="bin/main" path="src/main/java">
+		<attributes>
+			<attribute name="gradle_scope" value="main"/>
+			<attribute name="gradle_used_by_scope" value="main,test"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" output="bin/main" path="src/main/resources">
+		<attributes>
+			<attribute name="gradle_scope" value="main"/>
+			<attribute name="gradle_used_by_scope" value="main,test"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21/"/>
+	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
+	<classpathentry kind="output" path="bin/default"/>
+</classpath>

.gitignore

@@ -1 +1,14 @@
 result
+
+# Devenv
+.devenv*
+devenv.local.nix
+devenv.local.yaml
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml
+build
+build

.gradle/buildOutputCleanup/cache.properties

@@ -0,0 +1,2 @@
+#Wed May 27 23:44:22 CEST 2026
+gradle.version=9.4.1

.project

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>jprototerm</name>
+	<comment>Project jprototerm created by Buildship.</comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.buildship.core.gradleprojectbuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.buildship.core.gradleprojectnature</nature>
+	</natures>
+	<filteredResources>
+		<filter>
+			<id>1779917652126</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
+</projectDescription>

.settings/org.eclipse.buildship.core.prefs

@@ -0,0 +1,13 @@
+arguments=--init-script /home/anon/.eclipse/1927926929_linux_gtk_x86_64/configuration/org.eclipse.osgi/58/0/.cp/gradle/init/init.gradle
+auto.sync=false
+build.scans.enabled=false
+connection.gradle.distribution=GRADLE_DISTRIBUTION(VERSION(8.9))
+connection.project.dir=
+eclipse.preferences.version=1
+gradle.user.home=
+java.home=/nix/store/c3pl7bqrx3d2rc3dh98z6yaj0mv1p52g-openjdk-21.0.10+7/lib/openjdk
+jvm.arguments=
+offline.mode=false
+override.workspace.settings=true
+show.console.view=true
+show.executions.view=true

README.md

@@ -8,17 +8,17 @@ JavaFX canvas terminal prototype using `jlibghostty` for terminal emulation, Nix
 nix build
 ```
 
-The package build compiles with Nix-provided OpenJFX 25, `jlibghostty`, JToml, and GraalVM Native Image directly so it does not depend on Gradle plugin resolution inside the Nix sandbox.
+The package build uses GluonFX through Gradle so JavaFX native-image metadata is generated by the toolchain that is designed for it. In a strict pure Nix sandbox, Gradle dependencies must be vendored first with `gradle2nix` or a checked-in Maven/Gradle cache.
 
 For development:
 
 ```sh
 nix develop
 gradle -PjlibghosttyMavenRepo="$JLIBGHOSTTY_MAVEN_REPO" run
-gradle -PjlibghosttyMavenRepo="$JLIBGHOSTTY_MAVEN_REPO" nativeCompile
+gradle -PjlibghosttyMavenRepo="$JLIBGHOSTTY_MAVEN_REPO" -Pgluonfx.mainClassName=com.gregor.jprototerm.Main nativeExecutable
 ```
 
-The Gradle project is kept for interactive development and IDE import.
+The Gradle project is the source of truth for native JavaFX builds.
 
 ## Config
 
@@ -34,6 +34,8 @@ If `XDG_CONFIG_HOME` is unset, the fallback is:
 $HOME/.config/jprototerm/config.toml
 ```
 
+If no config file exists, jprototerm writes the default config on startup.
+
 Example, also available in `config.example.toml`:
 
 ```toml
@@ -57,11 +59,19 @@ navigate_down = "ALT+J"
 navigate_up = "ALT+K"
 navigate_right = "ALT+L"
 toggle_floating = "ALT+F"
+new_floating = "ALT+SHIFT+F"
+next_floating = "ALT+F12"
+close_pane = "ALT+X"
+open_font_selector = "ALT+T"
 ```
 
 ## Defaults
 
 - `Alt+h/j/k/l`: navigate panes
-- `Alt+f`: open or close a floating pane
-- Font default: `Symbols Nerd Font Mono`
+- `Alt+f`: show or hide all floating panes
+- `Alt+Shift+f`: create a new floating pane
+- `Alt+F12`: cycle floating panes
+- `Alt+x`: close the active floating pane
+- `Alt+t`: open the font selector
+- Font default: `JetBrainsMono Nerd Font`
 - Kitty graphics protocol parsing is enabled by default

build.gradle

@@ -0,0 +1,31 @@
+plugins {
+    id 'application'
+    id 'org.openjfx.javafxplugin' version '0.1.0'
+}
+
+repositories {
+    mavenCentral()
+
+    maven {
+        url = uri(System.getenv("JLIBGHOSTTY_MAVEN_REPO"))
+    }
+}
+
+dependencies {
+    implementation 'io.github.wasabithumb:jtoml:1.5.2'
+    implementation 'dev.jlibghostty:jlibghostty:0.1.0-SNAPSHOT'
+    implementation 'org.jetbrains.pty4j:pty4j:0.13.11'
+}
+
+javafx {
+    version = '22'
+    modules = [ 'javafx.controls', 'javafx.fxml' ]
+}
+
+application {
+    mainClass = 'com.gregor.jprototerm.Main'
+}
+
+run {
+    jvmArgs += ['--enable-native-access=ALL-UNNAMED']
+}

build.gradle.kts

@@ -1,32 +0,0 @@
-plugins {
-    application
-    id("org.openjfx.javafxplugin") version "0.1.0"
-    id("com.gluonhq.gluonfx-gradle-plugin") version "1.0.28"
-}
-
-group = "com.gregor"
-version = "0.1.0"
-
-dependencies {
-    implementation("dev.jlibghostty:jlibghostty:0.1.0-SNAPSHOT")
-    implementation("io.github.wasabithumb:jtoml:1.5.2")
-}
-
-java {
-    toolchain {
-        languageVersion.set(JavaLanguageVersion.of(25))
-    }
-}
-
-application {
-    mainClass.set("com.gregor.jprototerm.Main")
-}
-
-javafx {
-    version = "25"
-    modules = listOf("javafx.controls", "javafx.graphics")
-}
-
-gluonfx {
-    mainClassName = "com.gregor.jprototerm.Main"
-}

config.example.toml

@@ -1,6 +1,7 @@
 [terminal]
 columns = 100
 rows = 30
+max_scrollback = 100000
 shell = "/bin/bash"
 font_family = "JetBrainsMono Nerd Font"
 font_size = 15
@@ -18,3 +19,7 @@ navigate_down = "ALT+J"
 navigate_up = "ALT+K"
 navigate_right = "ALT+L"
 toggle_floating = "ALT+F"
+new_floating = "ALT+SHIFT+F"
+next_floating = "ALT+F12"
+close_pane = "ALT+X"
+open_font_selector = "ALT+T"

devenv.lock

@@ -0,0 +1,65 @@
+{
+  "nodes": {
+    "devenv": {
+      "locked": {
+        "dir": "src/modules",
+        "lastModified": 1779749056,
+        "narHash": "sha256-AtocdrunzuxTvSDn+82RntEhrs6TicM6Z4/zNQS9KKg=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "099ac65fcef79e88127bdc06adbd1ea94255274a",
+        "type": "github"
+      },
+      "original": {
+        "dir": "src/modules",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "inputs": {
+        "nixpkgs-src": "nixpkgs-src"
+      },
+      "locked": {
+        "lastModified": 1778507786,
+        "narHash": "sha256-HzSQCKMsMr8r55LwM1JuzIOB+8bzk0FEv6sItKvsfoY=",
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "8f24a228a782e24576b155d1e39f0d914b380691",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1778274207,
+        "narHash": "sha256-I4puXmX1iovcCHZlRmztO3vW0mAbbRvq4F8wgIMQ1MM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b3da656039dc7a6240f27b2ef8cc6a3ef3bccae7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

devenv.nix

@@ -0,0 +1,66 @@
+{ pkgs, lib, config, inputs, ... }:
+
+let
+  system = pkgs.stdenv.hostPlatform.system;
+
+  jlibghostty = builtins.getFlake
+    "git+https://gitea.gregorlohaus.com/gregor/jlibghostty.git";
+
+  jlib = jlibghostty.packages.${system}.jlibghostty;
+  hostNvidiaLibs = ".devenv/host-nvidia-libs";
+in
+{
+  packages = [
+    pkgs.git
+    pkgs.gradle_9
+    pkgs.jdk25
+    pkgs.jdt-language-server
+    pkgs.openjfx
+
+    pkgs.glib
+    pkgs.xorg.libXxf86vm
+    pkgs.xorg.libXrender
+    pkgs.xorg.libXtst
+    pkgs.xorg.libXi
+    pkgs.xorg.libXrandr
+
+    pkgs.libGL
+    pkgs.gtk3
+    pkgs.alsa-lib
+    pkgs.mesa-demos
+  ];
+
+  env.LD_LIBRARY_PATH = "${hostNvidiaLibs}:" + lib.makeLibraryPath [
+    pkgs.openjfx
+
+    pkgs.glib
+    pkgs.xorg.libXxf86vm
+    pkgs.xorg.libXrender
+    pkgs.xorg.libXtst
+    pkgs.xorg.libXi
+    pkgs.xorg.libXrandr
+
+    pkgs.libGL
+    pkgs.gtk3
+    pkgs.alsa-lib
+  ] + ":/usr/lib/x86_64-linux-gnu/nvidia/current";
+  env.__GLX_VENDOR_LIBRARY_NAME = "nvidia";
+  env.__EGL_VENDOR_LIBRARY_FILENAMES = "/usr/share/glvnd/egl_vendor.d/10_nvidia.json";
+  env.JLIBGHOSTTY_MAVEN_REPO = "${jlib}/maven";
+
+  enterShell = ''
+    mkdir -p ${hostNvidiaLibs}
+    for lib in \
+      /usr/lib/x86_64-linux-gnu/libnvidia*.so* \
+      /usr/lib/x86_64-linux-gnu/libGLX_nvidia.so* \
+      /usr/lib/x86_64-linux-gnu/libEGL_nvidia.so* \
+      /usr/lib/x86_64-linux-gnu/nvidia/current/libnvidia*.so* \
+      /usr/lib/x86_64-linux-gnu/nvidia/current/libGLX_nvidia.so* \
+      /usr/lib/x86_64-linux-gnu/nvidia/current/libEGL_nvidia.so*
+    do
+      if [ -e "$lib" ]; then
+        ln -sfn "$lib" ${hostNvidiaLibs}/"$(basename "$lib")"
+      fi
+    done
+  '';
+}

devenv.yaml

@@ -0,0 +1,18 @@
+# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
+inputs:
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling
+
+# If you're using non-OSS software, you can set allowUnfree to true.
+# allowUnfree: true
+
+# If you're not willing to allow unsupported packages:
+# allowUnsupportedSystem: false
+
+# If you're willing to use a package that's vulnerable
+# permittedInsecurePackages:
+#  - "openssl-1.1.1w"
+
+# If you have more than one devenv you can merge them
+#imports:
+# - ./backend

flake.lock

@@ -1,274 +0,0 @@
-{
-  "nodes": {
-    "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1761588595,
-        "narHash": "sha256-XKUZz9zewJNUj46b4AJdiRZJAvSZ0Dqj2BNfXvFlJC4=",
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "rev": "f387cd2afec9419c8ee37694406ca490c3f34ee5",
-        "type": "github"
-      },
-      "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
-    "ghostty": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "home-manager": "home-manager",
-        "nixpkgs": [
-          "jlibghostty",
-          "nixpkgs"
-        ],
-        "systems": "systems",
-        "zig": "zig",
-        "zon2nix": "zon2nix"
-      },
-      "locked": {
-        "lastModified": 1779812402,
-        "narHash": "sha256-gozJEyJHbaAyrbzODKeWJhxpUrGK6m4DIPDogfjz2BU=",
-        "owner": "ghostty-org",
-        "repo": "ghostty",
-        "rev": "2e5ad917eb4e325a3dbb161c3f41208a8cd35e44",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ghostty-org",
-        "repo": "ghostty",
-        "type": "github"
-      }
-    },
-    "home-manager": {
-      "inputs": {
-        "nixpkgs": [
-          "jlibghostty",
-          "ghostty",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1770586272,
-        "narHash": "sha256-Ucci8mu8QfxwzyfER2DQDbvW9t1BnTUJhBmY7ybralo=",
-        "owner": "nix-community",
-        "repo": "home-manager",
-        "rev": "b1f916ba052341edc1f80d4b2399f1092a4873ca",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "home-manager",
-        "type": "github"
-      }
-    },
-    "javafx-base": {
-      "flake": false,
-      "locked": {
-        "narHash": "sha256-96fttJUts/rFwKB7u5G8NWkK2NjJ3a6eIKbe1RTWkmM=",
-        "type": "file",
-        "url": "https://repo.maven.apache.org/maven2/org/openjfx/javafx-base/25/javafx-base-25-linux.jar"
-      },
-      "original": {
-        "type": "file",
-        "url": "https://repo.maven.apache.org/maven2/org/openjfx/javafx-base/25/javafx-base-25-linux.jar"
-      }
-    },
-    "javafx-controls": {
-      "flake": false,
-      "locked": {
-        "narHash": "sha256-2Cdc2/hPOjJmQidDjXu9vnlwAuawLn0cg/tLhzFfkUs=",
-        "type": "file",
-        "url": "https://repo.maven.apache.org/maven2/org/openjfx/javafx-controls/25/javafx-controls-25-linux.jar"
-      },
-      "original": {
-        "type": "file",
-        "url": "https://repo.maven.apache.org/maven2/org/openjfx/javafx-controls/25/javafx-controls-25-linux.jar"
-      }
-    },
-    "javafx-graphics": {
-      "flake": false,
-      "locked": {
-        "narHash": "sha256-w01IhRAQzcfTvwkqIQkjrI8ZPXT0VTEeijfzbqp3G0k=",
-        "type": "file",
-        "url": "https://repo.maven.apache.org/maven2/org/openjfx/javafx-graphics/25/javafx-graphics-25-linux.jar"
-      },
-      "original": {
-        "type": "file",
-        "url": "https://repo.maven.apache.org/maven2/org/openjfx/javafx-graphics/25/javafx-graphics-25-linux.jar"
-      }
-    },
-    "jlibghostty": {
-      "inputs": {
-        "ghostty": "ghostty",
-        "nixpkgs": "nixpkgs"
-      },
-      "locked": {
-        "lastModified": 1779889299,
-        "narHash": "sha256-B82MyhTvlfeszdcuM3F8YDSZYaxUom+m59oQKSoWjmQ=",
-        "ref": "refs/heads/main",
-        "rev": "eea43843002f8fae4fa4cb1c46b64339124bf6b2",
-        "revCount": 6,
-        "type": "git",
-        "url": "https://gitea.gregorlohaus.com/gregor/jlibghostty.git"
-      },
-      "original": {
-        "type": "git",
-        "url": "https://gitea.gregorlohaus.com/gregor/jlibghostty.git"
-      }
-    },
-    "jtoml-all": {
-      "flake": false,
-      "locked": {
-        "narHash": "sha256-KWrUaDVmnWzdkQxjgPFFNl8DOEvkCqWW3OmXU2sZHKw=",
-        "type": "file",
-        "url": "https://repo.maven.apache.org/maven2/io/github/wasabithumb/jtoml-all/1.5.2/jtoml-all-1.5.2.jar"
-      },
-      "original": {
-        "type": "file",
-        "url": "https://repo.maven.apache.org/maven2/io/github/wasabithumb/jtoml-all/1.5.2/jtoml-all-1.5.2.jar"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1779560665,
-        "narHash": "sha256-tpyBcxPpcQb8ukyNF7DoCwfSY3VPsxHoYwj00Cayv5o=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "64c08a7ca051951c8eae34e3e3cb1e202fe36786",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1779560665,
-        "narHash": "sha256-tpyBcxPpcQb8ukyNF7DoCwfSY3VPsxHoYwj00Cayv5o=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "64c08a7ca051951c8eae34e3e3cb1e202fe36786",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "javafx-base": "javafx-base",
-        "javafx-controls": "javafx-controls",
-        "javafx-graphics": "javafx-graphics",
-        "jlibghostty": "jlibghostty",
-        "jtoml-all": "jtoml-all",
-        "nixpkgs": "nixpkgs_2"
-      }
-    },
-    "systems": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
-    "zig": {
-      "inputs": {
-        "flake-compat": [
-          "jlibghostty",
-          "ghostty",
-          "flake-compat"
-        ],
-        "nixpkgs": [
-          "jlibghostty",
-          "ghostty",
-          "nixpkgs"
-        ],
-        "systems": [
-          "jlibghostty",
-          "ghostty",
-          "systems"
-        ]
-      },
-      "locked": {
-        "lastModified": 1776789209,
-        "narHash": "sha256-G6B7Q4TXn7MZ1mB+f9rymjsYF5PLWoSvmbxijb/99bw=",
-        "owner": "mitchellh",
-        "repo": "zig-overlay",
-        "rev": "14fe971844e841297ddd2ce9783d6892b467af39",
-        "type": "github"
-      },
-      "original": {
-        "owner": "mitchellh",
-        "repo": "zig-overlay",
-        "type": "github"
-      }
-    },
-    "zig_2": {
-      "inputs": {
-        "nixpkgs": [
-          "jlibghostty",
-          "ghostty",
-          "zon2nix",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1777234348,
-        "narHash": "sha256-fKw44a4qbUuI5eTG8k0gPbqMV5TOrjYF35PBzsYgd2U=",
-        "ref": "refs/heads/main",
-        "rev": "2c781c0609ecda600ab98f98cca417bbd981bd53",
-        "revCount": 1677,
-        "type": "git",
-        "url": "https://codeberg.org/jcollie/zig-overlay.git"
-      },
-      "original": {
-        "type": "git",
-        "url": "https://codeberg.org/jcollie/zig-overlay.git"
-      }
-    },
-    "zon2nix": {
-      "inputs": {
-        "nixpkgs": [
-          "jlibghostty",
-          "ghostty",
-          "nixpkgs"
-        ],
-        "zig": "zig_2"
-      },
-      "locked": {
-        "lastModified": 1777314365,
-        "narHash": "sha256-eLxQaD0wc96Neqkln8wHS0rNq/chPODifFkhwrwilEU=",
-        "owner": "jcollie",
-        "repo": "zon2nix",
-        "rev": "a5a1d412ad1ab6305511997bbc92b3a9dd6cb784",
-        "type": "github"
-      },
-      "original": {
-        "owner": "jcollie",
-        "ref": "main",
-        "repo": "zon2nix",
-        "type": "github"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

flake.nix

@@ -1,131 +0,0 @@
-{
-  description = "JavaFX terminal using jlibghostty and GraalVM Native Image";
-
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    jlibghostty.url = "git+https://gitea.gregorlohaus.com/gregor/jlibghostty.git";
-
-    jtoml-all = {
-      url = "https://repo.maven.apache.org/maven2/io/github/wasabithumb/jtoml-all/1.5.2/jtoml-all-1.5.2.jar";
-      flake = false;
-    };
-
-    javafx-base = {
-      url = "https://repo.maven.apache.org/maven2/org/openjfx/javafx-base/25/javafx-base-25-linux.jar";
-      flake = false;
-    };
-
-    javafx-controls = {
-      url = "https://repo.maven.apache.org/maven2/org/openjfx/javafx-controls/25/javafx-controls-25-linux.jar";
-      flake = false;
-    };
-
-    javafx-graphics = {
-      url = "https://repo.maven.apache.org/maven2/org/openjfx/javafx-graphics/25/javafx-graphics-25-linux.jar";
-      flake = false;
-    };
-  };
-
-  outputs = {
-    self,
-    nixpkgs,
-    jlibghostty,
-    jtoml-all,
-    javafx-base,
-    javafx-controls,
-    javafx-graphics
-  }:
-    let
-      system = "x86_64-linux";
-      pkgs = import nixpkgs { inherit system; };
-
-      jlib = jlibghostty.packages.${system}.jlibghostty;
-      graalvm = pkgs.graalvmPackages.graalvm-ce;
-      gradle = if pkgs ? gradle_9 then pkgs.gradle_9 else pkgs.gradle;
-      openjfx = pkgs.javaPackages.openjfx25;
-    in {
-      packages.${system}.default = pkgs.stdenvNoCC.mkDerivation {
-        pname = "jprototerm";
-        version = "0.1.0";
-        src = ./.;
-
-        nativeBuildInputs = [
-          graalvm
-          pkgs.makeWrapper
-        ];
-
-        buildPhase = ''
-          runHook preBuild
-
-          mkdir -p build/classes build/native-image build/lib build/javafx-modules
-
-          find src/main/java -name '*.java' | sort > build/sources.txt
-          cp ${jtoml-all} build/lib/jtoml-all.jar
-          cp ${javafx-base} build/javafx-modules/javafx-base.jar
-          cp ${javafx-controls} build/javafx-modules/javafx-controls.jar
-          cp ${javafx-graphics} build/javafx-modules/javafx-graphics.jar
-          javafx_module_path="build/javafx-modules"
-
-          jlib_classpath="$(
-            find ${jlib}/maven -type f -name '*.jar' \
-              ! -name '*-sources.jar' \
-              ! -name '*-javadoc.jar' \
-              | sort \
-              | paste -sd: -
-          )"
-          app_classpath="build/classes:build/lib/jtoml-all.jar:$jlib_classpath:build/javafx-modules/javafx-base.jar:build/javafx-modules/javafx-controls.jar:build/javafx-modules/javafx-graphics.jar"
-
-          javac \
-            --release 25 \
-            --module-path "$javafx_module_path" \
-            --add-modules javafx.controls,javafx.graphics \
-            -cp "build/lib/jtoml-all.jar:$jlib_classpath" \
-            -d build/classes \
-            @build/sources.txt
-
-          if [ -d src/main/resources ]; then
-            cp -R src/main/resources/. build/classes/
-          fi
-
-          native-image \
-            --no-fallback \
-            --enable-native-access=javafx.graphics \
-            --module-path "$javafx_module_path" \
-            --add-modules javafx.controls,javafx.graphics \
-            -cp "$app_classpath" \
-            -H:Class=com.gregor.jprototerm.Main \
-            -o build/native-image/jprototerm
-
-          runHook postBuild
-        '';
-
-        installPhase = ''
-          runHook preInstall
-
-          mkdir -p $out/bin
-          cp build/native-image/jprototerm $out/bin/jprototerm
-
-          wrapProgram $out/bin/jprototerm \
-            --set GDK_BACKEND x11 \
-            --set JAVA_TOOL_OPTIONS "-Dprism.order=sw" \
-            --prefix LD_LIBRARY_PATH : ${pkgs.lib.makeLibraryPath [ openjfx jlib ]}:${openjfx}/modules_libs/javafx.graphics \
-            --prefix PATH : ${pkgs.lib.makeBinPath [ pkgs.util-linux pkgs.bash ]}
-
-          runHook postInstall
-        '';
-      };
-
-      devShells.${system}.default = pkgs.mkShell {
-        packages = [
-          graalvm
-          gradle
-          pkgs.util-linux
-        ];
-
-        shellHook = ''
-          export JLIBGHOSTTY_MAVEN_REPO=${jlib}/maven
-          echo "Use: gradle -PjlibghosttyMavenRepo=$JLIBGHOSTTY_MAVEN_REPO run"
-        '';
-      };
-    };
-}

settings.gradle.kts

@@ -1,22 +0,0 @@
-pluginManagement {
-    repositories {
-        gradlePluginPortal()
-        mavenCentral()
-    }
-}
-
-dependencyResolutionManagement {
-    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
-    repositories {
-        mavenCentral()
-        maven {
-            url = uri(
-                providers.gradleProperty("jlibghosttyMavenRepo")
-                    .orElse("../jlibghostty/result/maven")
-                    .get()
-            )
-        }
-    }
-}
-
-rootProject.name = "jprototerm"

src/main/java/com/gregor/jprototerm/AppConfig.java

@@ -8,12 +8,17 @@ import io.github.wasabithumb.jtoml.value.primitive.TomlPrimitive;
 import io.github.wasabithumb.jtoml.value.table.TomlTable;
 
 import java.nio.file.Files;
+import java.io.IOException;
 import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.util.LinkedHashMap;
+import java.util.List;
 import java.util.Map;
 
 public record AppConfig(
         int columns,
         int rows,
+        long maxScrollback,
         String shell,
         String fontFamily,
         double fontSize,
@@ -22,10 +27,23 @@ public record AppConfig(
         boolean kittyGraphics,
         Map<String, KeyBinding> keybindings
 ) {
+    private static final List<String> KEYBINDING_KEYS = List.of(
+            "navigate_left",
+            "navigate_down",
+            "navigate_up",
+            "navigate_right",
+            "toggle_floating",
+            "new_floating",
+            "next_floating",
+            "close_pane",
+            "open_font_selector"
+    );
+
     public static AppConfig load() {
         AppConfig defaults = defaults();
         Path path = configPath();
         if (!Files.isRegularFile(path)) {
+            writeDefaultConfig(path, defaults);
             return defaults;
         }
 
@@ -34,19 +52,14 @@ public record AppConfig(
             return new AppConfig(
                     intValue(document, "terminal.columns", defaults.columns),
                     intValue(document, "terminal.rows", defaults.rows),
+                    longValue(document, "terminal.max_scrollback", defaults.maxScrollback),
                     stringValue(document, "terminal.shell", defaults.shell),
                     stringValue(document, "terminal.font_family", defaults.fontFamily),
                     doubleValue(document, "terminal.font_size", defaults.fontSize),
                     doubleValue(document, "window.width", defaults.windowWidth),
                     doubleValue(document, "window.height", defaults.windowHeight),
                     booleanValue(document, "kitty_graphics.enabled", defaults.kittyGraphics),
-                    Map.of(
-                            "navigate_left", binding(document, "keybindings.navigate_left", defaults.keybindings.get("navigate_left")),
-                            "navigate_down", binding(document, "keybindings.navigate_down", defaults.keybindings.get("navigate_down")),
-                            "navigate_up", binding(document, "keybindings.navigate_up", defaults.keybindings.get("navigate_up")),
-                            "navigate_right", binding(document, "keybindings.navigate_right", defaults.keybindings.get("navigate_right")),
-                            "toggle_floating", binding(document, "keybindings.toggle_floating", defaults.keybindings.get("toggle_floating"))
-                    )
+                    keybindings(document, defaults)
             );
         } catch (TomlException ex) {
             System.err.println("Could not parse " + path + ": " + ex.getMessage());
@@ -58,8 +71,9 @@ public record AppConfig(
         return new AppConfig(
                 100,
                 30,
+                100_000,
                 defaultShell(),
-                "Symbols Nerd Font Mono",
+                "JetBrainsMono Nerd Font",
                 15.0,
                 1200.0,
                 760.0,
@@ -69,11 +83,34 @@ public record AppConfig(
                         "navigate_down", KeyBinding.parse("ALT+J"),
                         "navigate_up", KeyBinding.parse("ALT+K"),
                         "navigate_right", KeyBinding.parse("ALT+L"),
-                        "toggle_floating", KeyBinding.parse("ALT+F")
+                        "toggle_floating", KeyBinding.parse("ALT+F"),
+                        "new_floating", KeyBinding.parse("ALT+SHIFT+F"),
+                        "next_floating", KeyBinding.parse("ALT+F12"),
+                        "close_pane", KeyBinding.parse("ALT+X"),
+                        "open_font_selector", KeyBinding.parse("ALT+T")
                 )
         );
     }
 
+    public AppConfig withFont(String family, double size) {
+        return new AppConfig(
+                columns,
+                rows,
+                maxScrollback,
+                shell,
+                family,
+                size,
+                windowWidth,
+                windowHeight,
+                kittyGraphics,
+                keybindings
+        );
+    }
+
+    public void save() {
+        save(configPath(), this);
+    }
+
     public static Path configPath() {
         String configHome = System.getenv("XDG_CONFIG_HOME");
         if (configHome != null && !configHome.isBlank()) {
@@ -83,8 +120,78 @@ public record AppConfig(
     }
 
     private static String defaultShell() {
-        String shell = System.getenv("SHELL");
-        return shell == null || shell.isBlank() ? "/bin/sh" : shell;
+        return "/bin/bash";
+    }
+
+    private static Map<String, KeyBinding> keybindings(TomlTable table, AppConfig defaults) {
+        Map<String, KeyBinding> parsed = new LinkedHashMap<>();
+        for (String key : KEYBINDING_KEYS) {
+            parsed.put(key, binding(table, "keybindings." + key, defaults.keybindings.get(key)));
+        }
+        return Map.copyOf(parsed);
+    }
+
+    private static void writeDefaultConfig(Path path, AppConfig defaults) {
+        save(path, defaults);
+    }
+
+    private static void save(Path path, AppConfig config) {
+        try {
+            Path parent = path.getParent();
+            if (parent != null) {
+                Files.createDirectories(parent);
+            }
+            Files.writeString(
+                    path,
+                    config.toToml(),
+                    StandardOpenOption.CREATE,
+                    StandardOpenOption.TRUNCATE_EXISTING,
+                    StandardOpenOption.WRITE
+            );
+        } catch (IOException ex) {
+            System.err.println("Could not write " + path + ": " + ex.getMessage());
+        }
+    }
+
+    private String toToml() {
+        StringBuilder builder = new StringBuilder();
+        builder.append("[terminal]\n");
+        builder.append("columns = ").append(columns).append('\n');
+        builder.append("rows = ").append(rows).append('\n');
+        builder.append("max_scrollback = ").append(maxScrollback).append('\n');
+        builder.append("shell = ").append(quoted(shell)).append('\n');
+        builder.append("font_family = ").append(quoted(fontFamily)).append('\n');
+        builder.append("font_size = ").append(trimDouble(fontSize)).append("\n\n");
+        builder.append("[window]\n");
+        builder.append("width = ").append(trimDouble(windowWidth)).append('\n');
+        builder.append("height = ").append(trimDouble(windowHeight)).append("\n\n");
+        builder.append("[kitty_graphics]\n");
+        builder.append("enabled = ").append(kittyGraphics).append("\n\n");
+        builder.append("[keybindings]\n");
+        for (String key : KEYBINDING_KEYS) {
+            KeyBinding binding = keybindings.get(key);
+            if (binding != null) {
+                builder.append(key).append(" = ").append(quoted(binding.toString())).append('\n');
+            }
+        }
+        return builder.toString();
+    }
+
+    private static String quoted(String value) {
+        return "\"" + value
+                .replace("\\", "\\\\")
+                .replace("\"", "\\\"")
+                .replace("\n", "\\n")
+                .replace("\r", "\\r")
+                .replace("\t", "\\t")
+                + "\"";
+    }
+
+    private static String trimDouble(double value) {
+        if (value == Math.rint(value)) {
+            return Long.toString((long) value);
+        }
+        return Double.toString(value);
     }
 
     private static KeyBinding binding(TomlTable table, String key, KeyBinding fallback) {
@@ -116,6 +223,18 @@ public record AppConfig(
         }
     }
 
+    private static long longValue(TomlTable table, String key, long fallback) {
+        TomlPrimitive primitive = primitive(table, key);
+        if (primitive == null) {
+            return fallback;
+        }
+        try {
+            return primitive.asInteger();
+        } catch (RuntimeException ex) {
+            return fallback;
+        }
+    }
+
     private static double doubleValue(TomlTable table, String key, double fallback) {
         TomlPrimitive primitive = primitive(table, key);
         if (primitive == null) {

src/main/java/com/gregor/jprototerm/KeyBinding.java

@@ -18,7 +18,7 @@ public record KeyBinding(boolean alt, boolean control, boolean shift, KeyCode co
                 case "ALT", "META" -> alt = true;
                 case "CTRL", "CONTROL" -> control = true;
                 case "SHIFT" -> shift = true;
-                default -> code = KeyCode.getKeyCode(token);
+                default -> code = keyCode(token);
             }
         }
 
@@ -34,4 +34,35 @@ public record KeyBinding(boolean alt, boolean control, boolean shift, KeyCode co
                 && event.isShiftDown() == shift
                 && event.getCode() == code;
     }
+
+    @Override
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        if (control) {
+            builder.append("CTRL+");
+        }
+        if (alt) {
+            builder.append("ALT+");
+        }
+        if (shift) {
+            builder.append("SHIFT+");
+        }
+        builder.append(code.getName().toUpperCase(Locale.ROOT).replace(' ', '_'));
+        return builder.toString();
+    }
+
+    private static KeyCode keyCode(String token) {
+        KeyCode alias = switch (token) {
+            case "GRAVE", "BACKTICK", "BACK_QUOTE", "`" -> KeyCode.BACK_QUOTE;
+            default -> null;
+        };
+        if (alias != null) {
+            return alias;
+        }
+        try {
+            return KeyCode.valueOf(token);
+        } catch (IllegalArgumentException ex) {
+            return KeyCode.getKeyCode(token);
+        }
+    }
 }

src/main/java/com/gregor/jprototerm/KeyEncoder.java

@@ -8,6 +8,20 @@ final class KeyEncoder {
     }
 
     static String encode(KeyEvent event) {
+        if (event.isControlDown() && !event.isAltDown() && !event.isMetaDown()) {
+            String control = controlSequence(event);
+            if (control != null) {
+                return control;
+            }
+        }
+
+        if (event.isAltDown() && !event.isControlDown() && !event.isMetaDown()) {
+            String alt = altSequence(event);
+            if (alt != null) {
+                return alt;
+            }
+        }
+
         KeyCode code = event.getCode();
         return switch (code) {
             case ENTER -> "\r";
@@ -23,7 +37,43 @@ final class KeyEncoder {
             case DELETE -> "\u001b[3~";
             case PAGE_UP -> "\u001b[5~";
             case PAGE_DOWN -> "\u001b[6~";
+            case F1 -> "\u001bOP";
+            case F2 -> "\u001bOQ";
+            case F3 -> "\u001bOR";
+            case F4 -> "\u001bOS";
+            case F5 -> "\u001b[15~";
+            case F6 -> "\u001b[17~";
+            case F7 -> "\u001b[18~";
+            case F8 -> "\u001b[19~";
+            case F9 -> "\u001b[20~";
+            case F10 -> "\u001b[21~";
+            case F11 -> "\u001b[23~";
+            case F12 -> "\u001b[24~";
             default -> null;
         };
     }
+
+    private static String controlSequence(KeyEvent event) {
+        KeyCode code = event.getCode();
+        if (code.isLetterKey()) {
+            return String.valueOf((char) (Character.toUpperCase(code.getName().charAt(0)) - '@'));
+        }
+        return switch (code) {
+            case SPACE -> "\u0000";
+            case OPEN_BRACKET -> "\u001b";
+            case BACK_SLASH -> "\u001c";
+            case CLOSE_BRACKET -> "\u001d";
+            case DIGIT6 -> "\u001e";
+            case MINUS -> "\u001f";
+            default -> null;
+        };
+    }
+
+    private static String altSequence(KeyEvent event) {
+        KeyCode code = event.getCode();
+        if (code.isLetterKey() || code.isDigitKey()) {
+            return "\u001b" + code.getName().toLowerCase();
+        }
+        return null;
+    }
 }

src/main/java/com/gregor/jprototerm/KittyGraphicsRegistry.java

@@ -1,143 +0,0 @@
-package com.gregor.jprototerm;
-
-import javafx.scene.canvas.GraphicsContext;
-import javafx.scene.image.Image;
-
-import java.io.ByteArrayInputStream;
-import java.util.ArrayList;
-import java.util.Base64;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-public final class KittyGraphicsRegistry {
-    private final boolean enabled;
-    private final StringBuilder stream = new StringBuilder();
-    private final Map<Integer, StringBuilder> chunks = new HashMap<>();
-    private final List<Placement> placements = new ArrayList<>();
-
-    public KittyGraphicsRegistry(boolean enabled) {
-        this.enabled = enabled;
-    }
-
-    public synchronized void accept(String text) {
-        if (!enabled) {
-            return;
-        }
-        stream.append(text);
-        parseBufferedCommands();
-    }
-
-    public synchronized void draw(GraphicsContext gc, double originX, double originY, double cellWidth, double lineHeight) {
-        if (!enabled) {
-            return;
-        }
-
-        for (Placement placement : placements) {
-            double x = originX + placement.column * cellWidth;
-            double y = originY + placement.row * lineHeight;
-            double width = placement.columns <= 0 ? placement.image.getWidth() : placement.columns * cellWidth;
-            double height = placement.rows <= 0 ? placement.image.getHeight() : placement.rows * lineHeight;
-            gc.drawImage(placement.image, x, y, width, height);
-        }
-    }
-
-    public synchronized void clear() {
-        chunks.clear();
-        placements.clear();
-        stream.setLength(0);
-    }
-
-    private void parseBufferedCommands() {
-        int start;
-        while ((start = stream.indexOf("\u001b_G")) >= 0) {
-            int end = commandEnd(start + 3);
-            if (end < 0) {
-                if (start > 0) {
-                    stream.delete(0, start);
-                }
-                return;
-            }
-
-            String command = stream.substring(start + 3, end);
-            handleCommand(command);
-            stream.delete(0, end + terminatorLength(end));
-        }
-
-        if (stream.length() > 16384) {
-            stream.delete(0, stream.length() - 4096);
-        }
-    }
-
-    private int commandEnd(int from) {
-        int bell = stream.indexOf("\u0007", from);
-        int st = stream.indexOf("\u001b\\", from);
-        if (bell < 0) {
-            return st;
-        }
-        if (st < 0) {
-            return bell;
-        }
-        return Math.min(bell, st);
-    }
-
-    private int terminatorLength(int end) {
-        return stream.charAt(end) == '\u0007' ? 1 : 2;
-    }
-
-    private void handleCommand(String command) {
-        int separator = command.indexOf(';');
-        if (separator < 0) {
-            return;
-        }
-
-        Map<String, String> control = parseControl(command.substring(0, separator));
-        String payload = command.substring(separator + 1).replace("\n", "").replace("\r", "");
-
-        int id = intControl(control, "i", 1);
-        boolean more = intControl(control, "m", 0) == 1;
-        chunks.computeIfAbsent(id, ignored -> new StringBuilder()).append(payload);
-        if (more) {
-            return;
-        }
-
-        String data = chunks.remove(id).toString();
-        try {
-            byte[] bytes = Base64.getDecoder().decode(data);
-            Image image = new Image(new ByteArrayInputStream(bytes));
-            if (!image.isError()) {
-                placements.add(new Placement(
-                        image,
-                        intControl(control, "x", 0),
-                        intControl(control, "y", 0),
-                        intControl(control, "c", 0),
-                        intControl(control, "r", 0)
-                ));
-            }
-        } catch (IllegalArgumentException ignored) {
-            chunks.remove(id);
-        }
-    }
-
-    private static Map<String, String> parseControl(String text) {
-        Map<String, String> result = new HashMap<>();
-        for (String part : text.split(",")) {
-            int equals = part.indexOf('=');
-            if (equals > 0) {
-                result.put(part.substring(0, equals), part.substring(equals + 1));
-            }
-        }
-        return result;
-    }
-
-    private static int intControl(Map<String, String> control, String key, int fallback) {
-        try {
-            return Integer.parseInt(control.getOrDefault(key, String.valueOf(fallback)));
-        } catch (NumberFormatException ex) {
-            return fallback;
-        }
-    }
-
-    private record Placement(Image image, int column, int row, int columns, int rows) {
-    }
-}

src/main/java/com/gregor/jprototerm/Main.java

@@ -3,26 +3,36 @@ package com.gregor.jprototerm;
 import javafx.animation.AnimationTimer;
 import javafx.application.Application;
 import javafx.scene.Scene;
+import javafx.scene.control.ButtonType;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Dialog;
+import javafx.scene.control.Label;
+import javafx.scene.control.Spinner;
+import javafx.scene.control.SpinnerValueFactory;
 import javafx.scene.input.KeyEvent;
+import javafx.scene.layout.GridPane;
 import javafx.scene.layout.StackPane;
+import javafx.scene.text.Font;
 import javafx.stage.Stage;
 
 public final class Main extends Application {
     private TerminalWorkspace workspace;
+    private TerminalCanvasView terminalView;
+    private AppConfig config;
 
     @Override
     public void start(Stage stage) {
-        AppConfig config = AppConfig.load();
+        config = AppConfig.load();
 
         workspace = new TerminalWorkspace(config);
-        TerminalCanvasView terminalView = new TerminalCanvasView(workspace, config);
+        terminalView = new TerminalCanvasView(workspace, config);
 
         StackPane root = new StackPane(terminalView.canvas());
         terminalView.canvas().widthProperty().bind(root.widthProperty());
         terminalView.canvas().heightProperty().bind(root.heightProperty());
 
         Scene scene = new Scene(root, config.windowWidth(), config.windowHeight());
-        scene.addEventFilter(KeyEvent.KEY_PRESSED, event -> handlePressed(config, event));
+        scene.addEventFilter(KeyEvent.KEY_PRESSED, this::handlePressed);
         scene.addEventFilter(KeyEvent.KEY_TYPED, event -> handleTyped(event));
 
         new AnimationTimer() {
@@ -38,9 +48,10 @@ public final class Main extends Application {
             workspace.close();
         });
         stage.show();
+        terminalView.canvas().requestFocus();
     }
 
-    private void handlePressed(AppConfig config, KeyEvent event) {
+    private void handlePressed(KeyEvent event) {
         if (config.keybindings().get("navigate_left").matches(event)) {
             workspace.navigate(Direction.LEFT);
             event.consume();
@@ -56,6 +67,18 @@ public final class Main extends Application {
         } else if (config.keybindings().get("toggle_floating").matches(event)) {
             workspace.toggleFloating();
             event.consume();
+        } else if (config.keybindings().get("new_floating").matches(event)) {
+            workspace.createFloatingPane();
+            event.consume();
+        } else if (config.keybindings().get("next_floating").matches(event)) {
+            workspace.nextFloatingPane();
+            event.consume();
+        } else if (config.keybindings().get("close_pane").matches(event)) {
+            workspace.closeActivePane();
+            event.consume();
+        } else if (config.keybindings().get("open_font_selector").matches(event)) {
+            openFontSelector();
+            event.consume();
         } else {
             String encoded = KeyEncoder.encode(event);
             if (encoded != null) {
@@ -77,9 +100,51 @@ public final class Main extends Application {
         }
     }
 
+    private void openFontSelector() {
+        Dialog<ButtonType> dialog = new Dialog<>();
+        dialog.setTitle("Font");
+        dialog.getDialogPane().getButtonTypes().addAll(ButtonType.OK, ButtonType.CANCEL);
+
+        ComboBox<String> family = new ComboBox<>();
+        family.getItems().setAll(Font.getFamilies());
+        family.setEditable(true);
+        family.setMaxWidth(Double.MAX_VALUE);
+        family.setValue(config.fontFamily());
+
+        Spinner<Double> size = new Spinner<>();
+        size.setEditable(true);
+        size.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(6.0, 48.0, config.fontSize(), 0.5));
+
+        GridPane content = new GridPane();
+        content.setHgap(10.0);
+        content.setVgap(10.0);
+        content.add(new Label("Family"), 0, 0);
+        content.add(family, 1, 0);
+        content.add(new Label("Size"), 0, 1);
+        content.add(size, 1, 1);
+        dialog.getDialogPane().setContent(content);
+
+        dialog.showAndWait()
+                .filter(button -> button == ButtonType.OK)
+                .ifPresent(ignored -> {
+                    String selectedFamily = family.getEditor().getText();
+                    if (selectedFamily == null || selectedFamily.isBlank()) {
+                        selectedFamily = family.getValue();
+                    }
+                    if (selectedFamily == null || selectedFamily.isBlank()) {
+                        return;
+                    }
+
+                    double selectedSize = size.getValue();
+                    config = config.withFont(selectedFamily.trim(), selectedSize);
+                    config.save();
+                    terminalView.setFont(config.fontFamily(), config.fontSize());
+                    terminalView.canvas().requestFocus();
+                });
+    }
+
     public static void main(String[] args) {
-        System.setProperty("prism.order", "sw");
-        System.setProperty("prism.verbose", "true");
+        System.setProperty("prism.order", System.getProperty("prism.order", "es2,sw"));
         launch(Main.class, args);
     }
 }

src/main/java/com/gregor/jprototerm/ShellSession.java

@@ -1,20 +1,25 @@
 package com.gregor.jprototerm;
 
+import com.pty4j.PtyProcess;
+import com.pty4j.PtyProcessBuilder;
+import com.pty4j.WinSize;
 import javafx.application.Platform;
 
 import java.io.IOException;
 import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
 public final class ShellSession implements AutoCloseable {
-    private final Process process;
+    private final PtyProcess process;
     private final OutputStream stdin;
     private final ExecutorService reader;
     private volatile boolean closed;
 
-    private ShellSession(Process process, TerminalPane pane, KittyGraphicsRegistry graphicsRegistry) {
+    private ShellSession(PtyProcess process) {
         this.process = process;
         this.stdin = process.getOutputStream();
         this.reader = Executors.newSingleThreadExecutor(runnable -> {
@@ -22,50 +27,65 @@ public final class ShellSession implements AutoCloseable {
             thread.setDaemon(true);
             return thread;
         });
-        reader.submit(() -> readOutput(pane, graphicsRegistry));
     }
 
-    public static ShellSession start(String shell, TerminalPane pane, KittyGraphicsRegistry graphicsRegistry) {
+    public static ShellSession start(String shell, TerminalPane pane, int columns, int rows) {
         try {
-            ProcessBuilder processBuilder = new ProcessBuilder(
-                    "script",
-                    "-qfec",
-                    shell + " -i",
-                    "/dev/null"
-            ).redirectErrorStream(true);
-            processBuilder.environment().put("TERM", "xterm-kitty");
-            processBuilder.environment().put("COLORTERM", "truecolor");
-            Process process = processBuilder.start();
-            return new ShellSession(process, pane, graphicsRegistry);
+            Map<String, String> environment = new HashMap<>(System.getenv());
+            environment.put("TERM", "xterm-kitty");
+            environment.put("COLORTERM", "truecolor");
+
+            PtyProcess process = new PtyProcessBuilder(new String[] {shell, "-i"})
+                    .setEnvironment(environment)
+                    .setInitialColumns(columns)
+                    .setInitialRows(rows)
+                    .setDirectory(System.getProperty("user.home"))
+                    .start();
+            return new ShellSession(process);
         } catch (IOException ex) {
             pane.write("failed to start shell: " + ex.getMessage() + "\r\n");
             throw new IllegalStateException("Could not start shell " + shell, ex);
         }
     }
 
+    public void startReading(TerminalPane pane) {
+        reader.submit(() -> readOutput(pane));
+    }
+
+    public void resize(int columns, int rows) {
+        if (closed) {
+            return;
+        }
+        process.setWinSize(new WinSize(columns, rows));
+    }
+
     public void send(String text) {
+        send(text.getBytes(StandardCharsets.UTF_8));
+    }
+
+    public void send(byte[] bytes) {
         if (closed) {
             return;
         }
         try {
-            stdin.write(text.getBytes(StandardCharsets.UTF_8));
+            stdin.write(bytes);
             stdin.flush();
         } catch (IOException ex) {
             close();
         }
     }
 
-    private void readOutput(TerminalPane pane, KittyGraphicsRegistry graphicsRegistry) {
+    private void readOutput(TerminalPane pane) {
         byte[] buffer = new byte[8192];
         try {
             int read;
             while ((read = process.getInputStream().read(buffer)) != -1) {
-                String text = new String(buffer, 0, read, StandardCharsets.UTF_8);
                 if (!closed) {
-                    graphicsRegistry.accept(text);
+                    byte[] bytes = new byte[read];
+                    System.arraycopy(buffer, 0, bytes, 0, read);
                     Platform.runLater(() -> {
                         if (!closed) {
-                            pane.write(text);
+                            pane.write(bytes);
                         }
                     });
                 }

src/main/java/com/gregor/jprototerm/TerminalCanvasView.java

@@ -1,26 +1,72 @@
 package com.gregor.jprototerm;
 
+import dev.jlibghostty.KittyImageCompression;
+import dev.jlibghostty.KittyImageFormat;
+import dev.jlibghostty.KittyImageSnapshot;
+import dev.jlibghostty.KittyPlacement;
+import dev.jlibghostty.KittyRenderInfo;
+import dev.jlibghostty.KeyModifiers;
+import dev.jlibghostty.MouseButton;
+import dev.jlibghostty.MouseEncoderSize;
+import dev.jlibghostty.MouseInput;
+import dev.jlibghostty.RenderCell;
+import dev.jlibghostty.RenderColor;
+import dev.jlibghostty.RenderCursorStyle;
+import dev.jlibghostty.RenderRow;
+import dev.jlibghostty.RenderStateSnapshot;
 import javafx.scene.canvas.Canvas;
 import javafx.scene.canvas.GraphicsContext;
+import javafx.scene.image.Image;
+import javafx.scene.image.PixelFormat;
+import javafx.scene.image.WritableImage;
+import javafx.scene.input.InputEvent;
+import javafx.scene.input.MouseEvent;
+import javafx.scene.input.ScrollEvent;
+import javafx.scene.input.ScrollEvent.VerticalTextScrollUnits;
 import javafx.scene.paint.Color;
 import javafx.scene.text.Font;
 import javafx.scene.text.FontSmoothingType;
+import javafx.scene.text.Text;
+
+import java.io.ByteArrayInputStream;
+import java.util.HashMap;
+import java.util.Map;
 
 public final class TerminalCanvasView {
+    private static final Color DEFAULT_FOREGROUND = Color.rgb(225, 229, 235);
+    private static final Color SELECTED_BACKGROUND = Color.rgb(52, 92, 140);
+
     private final Canvas canvas = new Canvas();
     private final TerminalWorkspace workspace;
     private final AppConfig config;
+    private final Map<Long, Image> kittyImageCache = new HashMap<>();
+    private String fontFamily;
+    private double fontSize;
+    private boolean mouseButtonPressed;
+    private MouseButton pressedButton = MouseButton.UNKNOWN;
 
     public TerminalCanvasView(TerminalWorkspace workspace, AppConfig config) {
         this.workspace = workspace;
         this.config = config;
+        this.fontFamily = config.fontFamily();
+        this.fontSize = config.fontSize();
         canvas.setFocusTraversable(true);
+        canvas.setOnMousePressed(this::handleMousePressed);
+        canvas.setOnMouseReleased(this::handleMouseReleased);
+        canvas.setOnMouseDragged(this::handleMouseDragged);
+        canvas.setOnMouseMoved(this::handleMouseMoved);
+        canvas.setOnScroll(this::handleScroll);
     }
 
     public Canvas canvas() {
         return canvas;
     }
 
+    public void setFont(String family, double size) {
+        this.fontFamily = family;
+        this.fontSize = size;
+    }
+
     public void render() {
         double width = canvas.getWidth();
         double height = canvas.getHeight();
@@ -29,7 +75,7 @@ public final class TerminalCanvasView {
         GraphicsContext gc = canvas.getGraphicsContext2D();
         gc.setFill(Color.rgb(16, 16, 18));
         gc.fillRect(0, 0, width, height);
-        gc.setFontSmoothingType(FontSmoothingType.GRAY);
+        gc.setFontSmoothingType(FontSmoothingType.LCD);
 
         for (TerminalPane pane : workspace.panes()) {
             drawPane(gc, pane);
@@ -53,22 +99,359 @@ public final class TerminalCanvasView {
         gc.setLineWidth(workspace.isActive(pane) ? 2.0 : 1.0);
         gc.strokeRect(pane.x() + 0.5, pane.y() + 0.5, pane.width() - 1.0, pane.height() - 1.0);
 
-        Font font = Font.font(config.fontFamily(), config.fontSize());
+        Font font = Font.font(fontFamily, fontSize);
         gc.setFont(font);
-        gc.setFill(Color.rgb(225, 229, 235));
 
-        double lineHeight = Math.ceil(config.fontSize() * 1.35);
+        FontMetrics metrics = measureFontMetrics(font);
+        int columns = Math.max(1, (int) ((pane.width() - 24.0) / metrics.cellWidth));
+        int rows = Math.max(1, (int) ((pane.height() - 24.0) / metrics.lineHeight));
+        pane.resize(columns, rows, (int) Math.round(metrics.cellWidth), (int) Math.round(metrics.lineHeight));
+
         double left = pane.x() + 12.0;
-        double baseline = pane.y() + 18.0;
-        int maxLines = Math.max(1, (int) ((pane.height() - 24.0) / lineHeight));
+        double top = pane.y() + 12.0;
+        double baseline = top + metrics.baselineOffset;
 
-        String[] lines = pane.snapshotText().split("\\R", -1);
-        int start = Math.max(0, lines.length - maxLines);
-        for (int i = start; i < lines.length; i++) {
-            gc.fillText(lines[i], left, baseline + ((i - start) * lineHeight));
+        RenderStateSnapshot snapshot = pane.renderSnapshot();
+        if (snapshot != null) {
+            for (RenderRow row : snapshot.renderRows()) {
+                drawRow(gc, row, left, top, baseline, metrics.cellWidth, metrics.lineHeight);
+            }
         }
 
-        pane.graphicsRegistry().draw(gc, pane.x() + 12.0, pane.y() + 12.0, config.fontSize() * 0.62, lineHeight);
+        if (snapshot != null) {
+            drawCursor(gc, snapshot, left, top, metrics.cellWidth, metrics.lineHeight);
+        }
+
+        if (config.kittyGraphics()) {
+            drawKittyGraphics(gc, pane, left, top, metrics.cellWidth, metrics.lineHeight);
+        }
         gc.restore();
     }
+
+    private static FontMetrics measureFontMetrics(Font font) {
+        Text text = new Text("┃MgÅjy");
+        text.setFont(font);
+        double lineHeight = Math.max(1.0, text.getLayoutBounds().getHeight());
+        double baselineOffset = -text.getLayoutBounds().getMinY();
+
+        String sample = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+        Text cell = new Text(sample);
+        cell.setFont(font);
+        double cellWidth = Math.max(1.0, cell.getLayoutBounds().getWidth() / sample.length());
+        return new FontMetrics(cellWidth, lineHeight, baselineOffset);
+    }
+
+    private void handleMousePressed(MouseEvent event) {
+        canvas.requestFocus();
+        TerminalPane pane = paneAt(event.getX(), event.getY());
+        if (pane == null) {
+            return;
+        }
+
+        workspace.focus(pane);
+        pressedButton = mouseButton(event);
+        mouseButtonPressed = true;
+        sendMouse(pane, MouseInput.press(pressedButton, eventX(pane, event.getX()), eventY(pane, event.getY()), modifiers(event)), true, event);
+    }
+
+    private void handleMouseReleased(MouseEvent event) {
+        TerminalPane pane = paneAt(event.getX(), event.getY());
+        if (pane == null) {
+            pane = workspace.activePane();
+        }
+
+        MouseButton button = pressedButton == MouseButton.UNKNOWN ? mouseButton(event) : pressedButton;
+        sendMouse(pane, MouseInput.release(button, eventX(pane, event.getX()), eventY(pane, event.getY()), modifiers(event)), false, event);
+        mouseButtonPressed = false;
+        pressedButton = MouseButton.UNKNOWN;
+    }
+
+    private void handleMouseDragged(MouseEvent event) {
+        TerminalPane pane = paneAt(event.getX(), event.getY());
+        if (pane == null) {
+            pane = workspace.activePane();
+        }
+
+        MouseButton button = pressedButton == MouseButton.UNKNOWN ? mouseButton(event) : pressedButton;
+        sendMouse(pane, MouseInput.drag(button, eventX(pane, event.getX()), eventY(pane, event.getY()), modifiers(event)), true, event);
+    }
+
+    private void handleMouseMoved(MouseEvent event) {
+        TerminalPane pane = paneAt(event.getX(), event.getY());
+        if (pane == null) {
+            return;
+        }
+
+        sendMouse(pane, MouseInput.motion(eventX(pane, event.getX()), eventY(pane, event.getY()), modifiers(event)), mouseButtonPressed, event);
+    }
+
+    private void handleScroll(ScrollEvent event) {
+        TerminalPane pane = paneAt(event.getX(), event.getY());
+        if (pane == null) {
+            return;
+        }
+
+        canvas.requestFocus();
+        workspace.focus(pane);
+        int direction = scrollDirection(event);
+        if (direction == 0) {
+            return;
+        }
+
+        MouseButton wheelButton = direction > 0 ? MouseButton.FOUR : MouseButton.FIVE;
+        int rows = scrollRows(event);
+        boolean sent = false;
+        for (int i = 0; i < rows; i++) {
+            sent |= sendMouse(
+                    pane,
+                    MouseInput.press(wheelButton, eventX(pane, event.getX()), eventY(pane, event.getY()), modifiers(event)),
+                    mouseButtonPressed,
+                    event
+            );
+        }
+        if (!sent) {
+            pane.scrollViewport(direction > 0 ? -rows : rows);
+            event.consume();
+        }
+    }
+
+    private boolean sendMouse(TerminalPane pane, MouseInput input, boolean anyButtonPressed, InputEvent event) {
+        MouseTarget target = mouseTarget(pane);
+        if (target == null) {
+            return false;
+        }
+
+        boolean sent = pane.sendMouse(input, target.size(), anyButtonPressed);
+        if (sent) {
+            event.consume();
+        }
+        return sent;
+    }
+
+    private TerminalPane paneAt(double x, double y) {
+        java.util.List<TerminalPane> panes = workspace.panes();
+        for (int i = panes.size() - 1; i >= 0; i--) {
+            TerminalPane pane = panes.get(i);
+            if (x >= pane.x() && x < pane.x() + pane.width() && y >= pane.y() && y < pane.y() + pane.height()) {
+                return pane;
+            }
+        }
+        return null;
+    }
+
+    private MouseTarget mouseTarget(TerminalPane pane) {
+        if (pane.width() <= 24.0 || pane.height() <= 24.0) {
+            return null;
+        }
+
+        FontMetrics metrics = measureFontMetrics(Font.font(fontFamily, fontSize));
+        int columns = Math.max(1, (int) ((pane.width() - 24.0) / metrics.cellWidth));
+        int rows = Math.max(1, (int) ((pane.height() - 24.0) / metrics.lineHeight));
+        long cellWidth = Math.max(1L, Math.round(metrics.cellWidth));
+        long cellHeight = Math.max(1L, Math.round(metrics.lineHeight));
+        long screenWidth = Math.max(1L, Math.round(columns * metrics.cellWidth));
+        long screenHeight = Math.max(1L, Math.round(rows * metrics.lineHeight));
+        return new MouseTarget(MouseEncoderSize.of(screenWidth, screenHeight, cellWidth, cellHeight), screenWidth, screenHeight);
+    }
+
+    private double eventX(TerminalPane pane, double canvasX) {
+        MouseTarget target = mouseTarget(pane);
+        if (target == null) {
+            return 0.0;
+        }
+        return clamp(canvasX - pane.x() - 12.0, 0.0, target.screenWidth() - 1.0);
+    }
+
+    private double eventY(TerminalPane pane, double canvasY) {
+        MouseTarget target = mouseTarget(pane);
+        if (target == null) {
+            return 0.0;
+        }
+        return clamp(canvasY - pane.y() - 12.0, 0.0, target.screenHeight() - 1.0);
+    }
+
+    private static double clamp(double value, double min, double max) {
+        return Math.max(min, Math.min(max, value));
+    }
+
+    private static KeyModifiers modifiers(MouseEvent event) {
+        return KeyModifiers.of(event.isShiftDown(), event.isControlDown(), event.isAltDown(), event.isMetaDown());
+    }
+
+    private static KeyModifiers modifiers(ScrollEvent event) {
+        return KeyModifiers.of(event.isShiftDown(), event.isControlDown(), event.isAltDown(), event.isMetaDown());
+    }
+
+    private static int scrollRows(ScrollEvent event) {
+        double rows;
+        if (event.getTextDeltaYUnits() == VerticalTextScrollUnits.LINES && event.getTextDeltaY() != 0.0) {
+            rows = Math.abs(event.getTextDeltaY());
+        } else if (event.getTextDeltaYUnits() == VerticalTextScrollUnits.PAGES && event.getTextDeltaY() != 0.0) {
+            rows = Math.abs(event.getTextDeltaY()) * 24.0;
+        } else if (event.getMultiplierY() > 0.0) {
+            rows = Math.abs(event.getDeltaY()) / event.getMultiplierY();
+        } else {
+            rows = Math.abs(event.getDeltaY()) / 40.0;
+        }
+        return Math.max(1, Math.min(64, (int) Math.ceil(rows)));
+    }
+
+    private static int scrollDirection(ScrollEvent event) {
+        if (event.getDeltaY() != 0.0) {
+            return event.getDeltaY() > 0.0 ? 1 : -1;
+        }
+        if (event.getTextDeltaYUnits() != VerticalTextScrollUnits.NONE && event.getTextDeltaY() != 0.0) {
+            return event.getTextDeltaY() > 0.0 ? 1 : -1;
+        }
+        return 0;
+    }
+
+    private static MouseButton mouseButton(MouseEvent event) {
+        return switch (event.getButton()) {
+            case PRIMARY -> MouseButton.LEFT;
+            case SECONDARY -> MouseButton.RIGHT;
+            case MIDDLE -> MouseButton.MIDDLE;
+            default -> MouseButton.UNKNOWN;
+        };
+    }
+
+    private static void drawRow(
+            GraphicsContext gc,
+            RenderRow row,
+            double left,
+            double top,
+            double baseline,
+            double cellWidth,
+            double lineHeight
+    ) {
+        for (RenderCell cell : row.cells()) {
+            double x = left + (cell.column() * cellWidth);
+            double cellTop = top + (row.row() * lineHeight);
+            cell.background().ifPresent(background -> {
+                gc.setFill(toFxColor(background));
+                fillCellRect(gc, x, cellTop, cellWidth, lineHeight);
+            });
+            if (cell.selected()) {
+                gc.setFill(SELECTED_BACKGROUND);
+                fillCellRect(gc, x, cellTop, cellWidth, lineHeight);
+            }
+            if (cell.codepoints().length == 0) {
+                continue;
+            }
+
+            double y = baseline + (row.row() * lineHeight);
+            Color foreground = cell.foreground().map(TerminalCanvasView::toFxColor).orElse(DEFAULT_FOREGROUND);
+            gc.setFill(foreground);
+            gc.fillText(cell.text(), x, y);
+        }
+    }
+
+    private static void fillCellRect(GraphicsContext gc, double x, double y, double width, double height) {
+        double x1 = Math.floor(x);
+        double y1 = Math.floor(y);
+        double x2 = Math.ceil(x + width);
+        double y2 = Math.ceil(y + height);
+        gc.fillRect(x1, y1, Math.max(1.0, x2 - x1), Math.max(1.0, y2 - y1));
+    }
+
+    private static Color toFxColor(RenderColor color) {
+        return Color.rgb(color.red(), color.green(), color.blue());
+    }
+
+    private static void drawCursor(GraphicsContext gc, RenderStateSnapshot snapshot, double left, double top, double cellWidth, double lineHeight) {
+        if (!snapshot.cursorVisible() || !snapshot.cursorViewportHasValue()) {
+            return;
+        }
+
+        double x = left + (snapshot.cursorViewportX() * cellWidth);
+        double y = top + (snapshot.cursorViewportY() * lineHeight);
+        gc.setStroke(Color.rgb(225, 229, 235));
+        gc.setFill(Color.rgb(225, 229, 235, 0.28));
+        gc.setLineWidth(1.5);
+
+        RenderCursorStyle style = snapshot.cursorStyle();
+        if (style == RenderCursorStyle.BAR) {
+            gc.strokeLine(x + 0.5, y + 2.0, x + 0.5, y + lineHeight - 2.0);
+        } else if (style == RenderCursorStyle.UNDERLINE) {
+            gc.strokeLine(x + 1.0, y + lineHeight - 2.0, x + cellWidth - 1.0, y + lineHeight - 2.0);
+        } else if (style == RenderCursorStyle.BLOCK) {
+            gc.fillRect(x + 0.5, y + 1.0, Math.max(1.0, cellWidth - 1.0), Math.max(1.0, lineHeight - 2.0));
+        } else {
+            gc.strokeRect(x + 0.5, y + 1.0, Math.max(1.0, cellWidth - 1.0), Math.max(1.0, lineHeight - 2.0));
+        }
+    }
+
+    private void drawKittyGraphics(GraphicsContext gc, TerminalPane pane, double originX, double originY, double cellWidth, double lineHeight) {
+        pane.kittyGraphics().ifPresent(graphics -> {
+            for (KittyPlacement placement : graphics.placements()) {
+                Image image = imageFor(placement);
+                if (image == null) {
+                    continue;
+                }
+
+                KittyRenderInfo renderInfo = placement.renderInfo().orElse(null);
+                double x = originX;
+                double y = originY;
+                double width = image.getWidth();
+                double height = image.getHeight();
+
+                if (renderInfo != null) {
+                    x += renderInfo.viewportColumn() * cellWidth;
+                    y += renderInfo.viewportRow() * lineHeight;
+                    width = renderInfo.gridColumns() > 0 ? renderInfo.gridColumns() * cellWidth : renderInfo.pixelWidth();
+                    height = renderInfo.gridRows() > 0 ? renderInfo.gridRows() * lineHeight : renderInfo.pixelHeight();
+                } else {
+                    width = placement.columns() > 0 ? placement.columns() * cellWidth : width;
+                    height = placement.rows() > 0 ? placement.rows() * lineHeight : height;
+                }
+
+                gc.drawImage(image, x + placement.xOffset(), y + placement.yOffset(), width, height);
+            }
+        });
+    }
+
+    private Image imageFor(KittyPlacement placement) {
+        return placement.image()
+                .map(snapshot -> kittyImageCache.computeIfAbsent(snapshot.id(), ignored -> decodeImage(snapshot)))
+                .orElse(null);
+    }
+
+    private Image decodeImage(KittyImageSnapshot snapshot) {
+        if (snapshot.compression() != KittyImageCompression.NONE) {
+            return null;
+        }
+
+        if (snapshot.format() == KittyImageFormat.PNG) {
+            return new Image(new ByteArrayInputStream(snapshot.data()));
+        }
+
+        int width = Math.toIntExact(snapshot.width());
+        int height = Math.toIntExact(snapshot.height());
+        WritableImage image = new WritableImage(width, height);
+        byte[] data = snapshot.data();
+
+        if (snapshot.format() == KittyImageFormat.RGBA) {
+            image.getPixelWriter().setPixels(0, 0, width, height, PixelFormat.getByteBgraInstance(), rgbaToBgra(data), 0, width * 4);
+        } else if (snapshot.format() == KittyImageFormat.RGB) {
+            image.getPixelWriter().setPixels(0, 0, width, height, PixelFormat.getByteRgbInstance(), data, 0, width * 3);
+        }
+        return image;
+    }
+
+    private static byte[] rgbaToBgra(byte[] rgba) {
+        byte[] bgra = new byte[rgba.length];
+        for (int i = 0; i + 3 < rgba.length; i += 4) {
+            bgra[i] = rgba[i + 2];
+            bgra[i + 1] = rgba[i + 1];
+            bgra[i + 2] = rgba[i];
+            bgra[i + 3] = rgba[i + 3];
+        }
+        return bgra;
+    }
+
+    private record FontMetrics(double cellWidth, double lineHeight, double baselineOffset) {
+    }
+
+    private record MouseTarget(MouseEncoderSize size, long screenWidth, long screenHeight) {
+    }
 }

src/main/java/com/gregor/jprototerm/TerminalPane.java

@@ -1,30 +1,46 @@
 package com.gregor.jprototerm;
 
 import dev.jlibghostty.Ghostty;
+import dev.jlibghostty.KittyGraphics;
+import dev.jlibghostty.MouseAction;
+import dev.jlibghostty.MouseEncoder;
+import dev.jlibghostty.MouseEncoderSize;
+import dev.jlibghostty.MouseInput;
+import dev.jlibghostty.RenderStateSnapshot;
+import dev.jlibghostty.ScrollViewport;
 import dev.jlibghostty.Terminal;
 import dev.jlibghostty.TerminalOptions;
+import dev.jlibghostty.DeviceAttributes;
 
+import java.util.Optional;
 import java.util.concurrent.atomic.AtomicReference;
 
 public final class TerminalPane implements AutoCloseable {
     private final Terminal terminal;
-    private final KittyGraphicsRegistry graphicsRegistry;
-    private final AtomicReference<String> snapshotText = new AtomicReference<>("");
+    private final MouseEncoder mouseEncoder = new MouseEncoder();
+    private final AtomicReference<RenderStateSnapshot> renderSnapshot = new AtomicReference<>();
     private ShellSession session;
     private boolean floating;
+    private boolean visible = true;
     private double x;
     private double y;
     private double width;
     private double height;
+    private int columns;
+    private int rows;
+    private int pixelWidth;
+    private int pixelHeight;
 
-    private TerminalPane(Terminal terminal, KittyGraphicsRegistry graphicsRegistry) {
+    private TerminalPane(Terminal terminal, int columns, int rows) {
         this.terminal = terminal;
-        this.graphicsRegistry = graphicsRegistry;
+        this.columns = columns;
+        this.rows = rows;
     }
 
-    public static TerminalPane create(int columns, int rows, boolean kittyGraphics) {
-        Terminal terminal = Ghostty.open(TerminalOptions.of(columns, rows));
-        TerminalPane pane = new TerminalPane(terminal, new KittyGraphicsRegistry(kittyGraphics));
+    public static TerminalPane create(int columns, int rows, long maxScrollback) {
+        Terminal terminal = Ghostty.open(new TerminalOptions(columns, rows, maxScrollback));
+        terminal.setDeviceAttributesProvider(DeviceAttributes::xtermCompatible);
+        TerminalPane pane = new TerminalPane(terminal, columns, rows);
         pane.refresh();
         return pane;
     }
@@ -36,22 +52,72 @@ public final class TerminalPane implements AutoCloseable {
         }
     }
 
+    public void write(byte[] bytes) {
+        synchronized (terminal) {
+            terminal.write(bytes);
+            refresh();
+        }
+    }
+
     public void attach(ShellSession session) {
         this.session = session;
+        terminal.setPtyWriter(bytes -> {
+            ShellSession current = this.session;
+            if (current != null) {
+                current.send(bytes);
+            }
+        });
+        session.startReading(this);
     }
 
     public void send(String text) {
+        scrollViewportToBottom();
         if (session != null) {
             session.send(text);
         }
     }
 
-    public String snapshotText() {
-        return snapshotText.get();
+    public boolean sendMouse(MouseInput input, MouseEncoderSize size, boolean anyButtonPressed) {
+        synchronized (terminal) {
+            mouseEncoder.syncFromTerminal(terminal);
+            mouseEncoder.setSize(size);
+            mouseEncoder.setAnyButtonPressed(anyButtonPressed);
+            mouseEncoder.setTrackLastCell(input.action() == MouseAction.MOTION && input.button().isEmpty());
+
+            byte[] encoded = mouseEncoder.encode(input);
+            if (encoded.length == 0) {
+                return false;
+            }
+
+            if (session != null) {
+                session.send(encoded);
+            }
+            return true;
+        }
     }
 
-    public KittyGraphicsRegistry graphicsRegistry() {
-        return graphicsRegistry;
+    public void scrollViewport(long rows) {
+        synchronized (terminal) {
+            terminal.scrollViewport(ScrollViewport.delta(rows));
+            refresh();
+        }
+    }
+
+    public void scrollViewportToBottom() {
+        synchronized (terminal) {
+            terminal.scrollViewport(ScrollViewport.bottom());
+            refresh();
+        }
+    }
+
+    public RenderStateSnapshot renderSnapshot() {
+        return renderSnapshot.get();
+    }
+
+    public Optional<KittyGraphics> kittyGraphics() {
+        synchronized (terminal) {
+            return terminal.kittyGraphics();
+        }
     }
 
     public boolean floating() {
@@ -62,6 +128,14 @@ public final class TerminalPane implements AutoCloseable {
         this.floating = floating;
     }
 
+    public boolean visible() {
+        return visible;
+    }
+
+    public void setVisible(boolean visible) {
+        this.visible = visible;
+    }
+
     public double x() {
         return x;
     }
@@ -85,8 +159,29 @@ public final class TerminalPane implements AutoCloseable {
         this.height = height;
     }
 
+    public void resize(int columns, int rows, int pixelWidth, int pixelHeight) {
+        if (columns <= 0 || rows <= 0 || pixelWidth <= 0 || pixelHeight <= 0) {
+            return;
+        }
+        if (this.columns == columns && this.rows == rows && this.pixelWidth == pixelWidth && this.pixelHeight == pixelHeight) {
+            return;
+        }
+
+        synchronized (terminal) {
+            terminal.resize(columns, rows, pixelWidth, pixelHeight);
+            if (session != null) {
+                session.resize(columns, rows);
+            }
+            this.columns = columns;
+            this.rows = rows;
+            this.pixelWidth = pixelWidth;
+            this.pixelHeight = pixelHeight;
+            refresh();
+        }
+    }
+
     private void refresh() {
-        snapshotText.set(String.valueOf(terminal.snapshot()));
+        renderSnapshot.set(terminal.renderSnapshot());
     }
 
     @Override
@@ -95,6 +190,7 @@ public final class TerminalPane implements AutoCloseable {
             session.close();
             session = null;
         }
+        mouseEncoder.close();
         terminal.close();
     }
 }

src/main/java/com/gregor/jprototerm/TerminalWorkspace.java

@@ -8,6 +8,7 @@ public final class TerminalWorkspace implements AutoCloseable {
     private final AppConfig config;
     private final List<TerminalPane> panes = new ArrayList<>();
     private int activeIndex;
+    private int hiddenFloatingFocusIndex = -1;
 
     public TerminalWorkspace(AppConfig config) {
         this.config = config;
@@ -19,28 +20,55 @@ public final class TerminalWorkspace implements AutoCloseable {
     }
 
     public List<TerminalPane> panes() {
-        return List.copyOf(panes);
+        List<TerminalPane> visible = panes.stream().filter(TerminalPane::visible).toList();
+        TerminalPane active = activePane();
+        if (!active.visible() || !active.floating()) {
+            return visible;
+        }
+
+        List<TerminalPane> ordered = new ArrayList<>(visible.size());
+        visible.stream()
+                .filter(pane -> pane != active)
+                .forEach(ordered::add);
+        ordered.add(active);
+        return List.copyOf(ordered);
     }
 
     public boolean isActive(TerminalPane pane) {
         return activePane() == pane;
     }
 
+    public void focus(TerminalPane pane) {
+        int index = panes.indexOf(pane);
+        if (index >= 0 && pane.visible()) {
+            activeIndex = index;
+        }
+    }
+
     public void layout(double width, double height) {
-        List<TerminalPane> tiled = panes.stream().filter(pane -> !pane.floating()).toList();
+        List<TerminalPane> tiled = panes.stream()
+                .filter(TerminalPane::visible)
+                .filter(pane -> !pane.floating())
+                .toList();
         int tileCount = Math.max(1, tiled.size());
         double tileWidth = width / tileCount;
         for (int i = 0; i < tiled.size(); i++) {
             tiled.get(i).bounds(i * tileWidth, 0, tileWidth, height);
         }
 
-        for (TerminalPane pane : panes) {
-            if (pane.floating()) {
+        List<TerminalPane> floating = panes.stream()
+                .filter(TerminalPane::visible)
+                .filter(TerminalPane::floating)
+                .toList();
+        for (int i = 0; i < floating.size(); i++) {
+            TerminalPane pane = floating.get(i);
+            if (pane.visible() && pane.floating()) {
                 double floatingWidth = Math.max(420, width * 0.58);
                 double floatingHeight = Math.max(260, height * 0.58);
+                double offset = i * 28.0;
                 pane.bounds(
-                        (width - floatingWidth) / 2.0,
-                        (height - floatingHeight) / 2.0,
+                        Math.min(width - floatingWidth - 12.0, ((width - floatingWidth) / 2.0) + offset),
+                        Math.min(height - floatingHeight - 12.0, ((height - floatingHeight) / 2.0) + offset),
                         floatingWidth,
                         floatingHeight
                 );
@@ -50,7 +78,12 @@ public final class TerminalWorkspace implements AutoCloseable {
 
     public void navigate(Direction direction) {
         TerminalPane current = activePane();
+        if (current.floating() && navigateFloatingStack(direction)) {
+            return;
+        }
+
         panes.stream()
+                .filter(TerminalPane::visible)
                 .filter(pane -> pane != current)
                 .filter(pane -> directionFilter(direction, current, pane))
                 .min(Comparator.comparingDouble(pane -> distance(current, pane)))
@@ -58,23 +91,160 @@ public final class TerminalWorkspace implements AutoCloseable {
     }
 
     public void toggleFloating() {
-        TerminalPane active = activePane();
-        if (active.floating()) {
-            panes.remove(activeIndex);
-            active.close();
-            activeIndex = Math.max(0, activeIndex - 1);
+        List<TerminalPane> floating = panes.stream()
+                .filter(TerminalPane::floating)
+                .toList();
+        if (floating.isEmpty()) {
+            createFloatingPane();
             return;
         }
 
+        boolean anyVisible = floating.stream().anyMatch(TerminalPane::visible);
+        if (anyVisible) {
+            TerminalPane active = activePane();
+            hiddenFloatingFocusIndex = active.floating() ? activeIndex : firstVisibleFloatingIndex();
+            floating.forEach(pane -> pane.setVisible(false));
+            activeIndex = firstVisibleNonFloatingIndex();
+        } else {
+            floating.forEach(pane -> pane.setVisible(true));
+            activeIndex = visibleIndexOrFallback(hiddenFloatingFocusIndex, panes.indexOf(floating.get(floating.size() - 1)));
+            hiddenFloatingFocusIndex = -1;
+        }
+    }
+
+    public void createFloatingPane() {
         TerminalPane pane = openPane(true);
         panes.add(pane);
         activeIndex = panes.size() - 1;
     }
 
+    public void nextFloatingPane() {
+        TerminalPane next = nextFloatingAfter(activeIndex);
+        next.setVisible(true);
+        activeIndex = panes.indexOf(next);
+    }
+
+    public void closeActivePane() {
+        TerminalPane active = activePane();
+        if (!active.floating() || panes.stream().filter(pane -> !pane.floating()).count() == 0) {
+            return;
+        }
+
+        int removed = activeIndex;
+        int previous = previousVisibleIndex(removed);
+        panes.remove(removed);
+        active.close();
+        activeIndex = adjustIndexAfterRemoval(previous, removed);
+        hiddenFloatingFocusIndex = adjustHiddenFocusAfterRemoval(hiddenFloatingFocusIndex, removed);
+    }
+
+    private TerminalPane nextFloatingAfter(int index) {
+        for (int i = index + 1; i < panes.size(); i++) {
+            TerminalPane pane = panes.get(i);
+            if (pane.floating()) {
+                return pane;
+            }
+        }
+        for (int i = 0; i <= index && i < panes.size(); i++) {
+            TerminalPane pane = panes.get(i);
+            if (pane.floating()) {
+                return pane;
+            }
+        }
+        return createAndReturnFloatingPane();
+    }
+
+    private TerminalPane createAndReturnFloatingPane() {
+        TerminalPane pane = openPane(true);
+        panes.add(pane);
+        return pane;
+    }
+
+    private boolean navigateFloatingStack(Direction direction) {
+        List<TerminalPane> floating = panes.stream()
+                .filter(TerminalPane::visible)
+                .filter(TerminalPane::floating)
+                .toList();
+        if (floating.size() < 2) {
+            return false;
+        }
+
+        int current = floating.indexOf(activePane());
+        if (current < 0) {
+            return false;
+        }
+
+        int next = switch (direction) {
+            case LEFT, UP -> current - 1;
+            case DOWN, RIGHT -> current + 1;
+        };
+        if (next < 0 || next >= floating.size()) {
+            return false;
+        }
+
+        activeIndex = panes.indexOf(floating.get(next));
+        return true;
+    }
+
+    private int firstVisibleFloatingIndex() {
+        for (int i = 0; i < panes.size(); i++) {
+            TerminalPane pane = panes.get(i);
+            if (pane.visible() && pane.floating()) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    private int firstVisibleNonFloatingIndex() {
+        for (int i = 0; i < panes.size(); i++) {
+            TerminalPane pane = panes.get(i);
+            if (pane.visible() && !pane.floating()) {
+                return i;
+            }
+        }
+        return 0;
+    }
+
+    private int previousVisibleIndex(int index) {
+        for (int i = index - 1; i >= 0; i--) {
+            if (panes.get(i).visible()) {
+                return i;
+            }
+        }
+        for (int i = index + 1; i < panes.size(); i++) {
+            if (panes.get(i).visible()) {
+                return i;
+            }
+        }
+        return firstVisibleNonFloatingIndex();
+    }
+
+    private int visibleIndexOrFallback(int index, int fallback) {
+        if (index >= 0 && index < panes.size() && panes.get(index).visible()) {
+            return index;
+        }
+        return fallback;
+    }
+
+    private static int adjustIndexAfterRemoval(int index, int removedIndex) {
+        if (index < 0) {
+            return 0;
+        }
+        return index > removedIndex ? index - 1 : index;
+    }
+
+    private static int adjustHiddenFocusAfterRemoval(int index, int removedIndex) {
+        if (index < 0 || index == removedIndex) {
+            return -1;
+        }
+        return index > removedIndex ? index - 1 : index;
+    }
+
     private TerminalPane openPane(boolean floating) {
-        TerminalPane pane = TerminalPane.create(config.columns(), config.rows(), config.kittyGraphics());
+        TerminalPane pane = TerminalPane.create(config.columns(), config.rows(), config.maxScrollback());
         pane.setFloating(floating);
-        pane.attach(ShellSession.start(config.shell(), pane, pane.graphicsRegistry()));
+        pane.attach(ShellSession.start(config.shell(), pane, config.columns(), config.rows()));
         return pane;
     }
 

src/main/resources/META-INF/native-image/com.gregor/jprototerm/reflect-config.json

@@ -1,37 +0,0 @@
-[
-  {
-    "name": "com.gregor.jprototerm.Main",
-    "allDeclaredConstructors": true,
-    "allPublicConstructors": true
-  },
-  {
-    "name": "com.sun.javafx.tk.quantum.QuantumToolkit",
-    "allDeclaredConstructors": true,
-    "allPublicConstructors": true
-  },
-  {
-    "name": "com.sun.glass.ui.gtk.GtkPlatformFactory",
-    "allDeclaredConstructors": true,
-    "allPublicConstructors": true
-  },
-  {
-    "name": "com.sun.glass.ui.gtk.GtkApplication",
-    "allDeclaredConstructors": true,
-    "allPublicConstructors": true
-  },
-  {
-    "name": "com.sun.prism.es2.ES2Pipeline",
-    "allDeclaredConstructors": true,
-    "allPublicConstructors": true
-  },
-  {
-    "name": "com.sun.prism.es2.X11GLFactory",
-    "allDeclaredConstructors": true,
-    "allPublicConstructors": true
-  },
-  {
-    "name": "com.sun.prism.sw.SWPipeline",
-    "allDeclaredConstructors": true,
-    "allPublicConstructors": true
-  }
-]

src/main/resources/META-INF/native-image/com.gregor/jprototerm/resource-config.json

@@ -1,6 +0,0 @@
-{
-  "resources": [
-    { "pattern": ".*\\.css$" },
-    { "pattern": ".*\\.toml$" }
-  ]
-}