feat: add demo-app example project and fix CSS generation

examples/demo-app/README.md

@@ -0,0 +1,114 @@
+# TailwindFX Example Project
+
+This is an example project demonstrating how to use TailwindFX with the Maven plugin for build-time CSS generation.
+
+## Prerequisites
+
+- Java 17 or higher
+- Maven 3.6+
+- TailwindFX installed locally (`mvn install` in the main project)
+
+## Building the Example
+
+```bash
+cd tailwindfx-example
+mvn clean compile
+```
+
+This will:
+1. Scan your Java and FXML files for Tailwind classes
+2. Generate an optimized CSS file at `target/classes/css/tailwindfx-generated.css`
+3. Compile your application
+
+## Running the Example
+
+```bash
+mvn javafx:run
+```
+
+## Project Structure
+
+```
+tailwindfx-example/
+├── pom.xml                          # Maven configuration with TailwindFX plugin
+├── src/main/java/com/example/
+│   ├── HelloApplication.java        # Main application class
+│   └── HelloController.java         # FXML controller
+└── src/main/resources/com/example/
+    └── hello-view.fxml              # FXML view with Tailwind classes
+```
+
+## Using Tailwind Classes
+
+In Java code:
+```java
+button.getStyleClass().addAll("bg-blue-500", "text-white", "p-4");
+```
+
+In FXML:
+```xml
+<Button text="Click Me" styleClass="bg-blue-500, text-white, p-4"/>
+```
+
+## Plugin Configuration
+
+The Maven plugin is configured in `pom.xml`:
+
+```xml
+<plugin>
+    <groupId>io.github.yasmramos.tailwindfx</groupId>
+    <artifactId>tailwindfx-maven-plugin</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <executions>
+        <execution>
+            <goals>
+                <goal>generate</goal>
+            </goals>
+            <configuration>
+                <includeBase>true</includeBase>
+                <includeColors>true</includeColors>
+                <minify>false</minify>
+            </configuration>
+        </execution>
+    </executions>
+</plugin>
+```
+
+### Configuration Options
+
+| Option | Default | Description |
+|--------|---------|-------------|
+| `includeBase` | `true` | Include CSS variables and reset |
+| `includeColors` | `true` | Include color palette |
+| `minify` | `false` | Minify generated CSS |
+| `outputDirectory` | `${project.build.outputDirectory}/css` | Output directory |
+| `outputFileName` | `tailwindfx-generated.css` | Output file name |
+
+## Generated CSS
+
+After running `mvn compile`, check the generated CSS at:
+```
+target/classes/css/tailwindfx-generated.css
+```
+
+This file contains only the Tailwind classes used in your project, resulting in a smaller bundle size.
+
+## Next Steps
+
+1. Add more Tailwind classes to your FXML/Java files
+2. Re-run `mvn compile` to regenerate CSS
+3. Run with `mvn javafx:run` to see the changes
+
+## Troubleshooting
+
+**Plugin not found:** Make sure you've installed TailwindFX locally first:
+```bash
+cd ..
+mvn clean install
+```
+
+**Classes not detected:** Ensure you're using the correct syntax:
+- Java: `getStyleClass().addAll("class1", "class2")` or string literals
+- FXML: `styleClass="class1, class2"`
+
+**CSS not applied:** Check that `TailwindFX.install()` is called in your Application class.

examples/demo-app/pom.xml

@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>io.github.yasmramos</groupId>
+    <artifactId>demo-app</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>TailwindFX Example</name>
+    <description>Example project demonstrating TailwindFX with Maven plugin</description>
+
+    <properties>
+        <maven.compiler.release>17</maven.compiler.release>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <javafx.version>17.0.2</javafx.version>
+        <tailwindfx.version>1.0-SNAPSHOT</tailwindfx.version>
+    </properties>
+
+    <dependencies>
+        <!-- JavaFX -->
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-controls</artifactId>
+            <version>${javafx.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-fxml</artifactId>
+            <version>${javafx.version}</version>
+        </dependency>
+
+        <!-- TailwindFX -->
+        <dependency>
+            <groupId>io.github.yasmramos</groupId>
+            <artifactId>tailwindfx</artifactId>
+            <version>${tailwindfx.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <!-- TailwindFX Maven Plugin -->
+            <plugin>
+                <groupId>io.github.yasmramos</groupId>
+                <artifactId>tailwindfx-maven-plugin</artifactId>
+                <version>${tailwindfx.version}</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>generate</goal>
+                        </goals>
+                        <configuration>
+                            <includeBase>true</includeBase>
+                            <includeColors>true</includeColors>
+                            <minify>false</minify>
+                            <outputDirectory>${project.build.outputDirectory}/css</outputDirectory>
+                            <outputFileName>tailwindfx-generated.css</outputFileName>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <!-- JavaFX Maven Plugin -->
+            <plugin>
+                <groupId>org.openjfx</groupId>
+                <artifactId>javafx-maven-plugin</artifactId>
+                <version>0.0.8</version>
+                <configuration>
+                    <mainClass>com.example.HelloApplication</mainClass>
+                </configuration>
+            </plugin>
+
+            <!-- Compiler Plugin -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.11.0</version>
+                <configuration>
+                    <release>17</release>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

examples/demo-app/src/main/java/com/example/HelloApplication.java

@@ -0,0 +1,26 @@
+package com.example;
+
+import io.github.yasmramos.tailwindfx.TailwindFX;
+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+
+public class HelloApplication extends Application {
+    @Override
+    public void start(Stage stage) throws Exception {
+        FXMLLoader fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("hello-view.fxml"));
+        Scene scene = new Scene(fxmlLoader.load());
+
+        // Initialize TailwindFX with the scene
+        TailwindFX.install(scene);
+
+        stage.setTitle("TailwindFX Example");
+        stage.setScene(scene);
+        stage.show();
+    }
+
+    public static void main(String[] args) {
+        launch();
+    }
+}

examples/demo-app/src/main/java/com/example/HelloController.java

@@ -0,0 +1,14 @@
+package com.example;
+
+import javafx.fxml.FXML;
+import javafx.scene.control.Label;
+
+public class HelloController {
+    @FXML
+    private Label welcomeText;
+
+    @FXML
+    protected void onHelloButtonClick() {
+        welcomeText.setText("Welcome to JavaFX Application!");
+    }
+}

examples/demo-app/src/main/resources/com/example/hello-view.fxml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.geometry.Insets?>
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.layout.VBox?>
+
+<VBox xmlns="http://javafx.com/javafx/17" 
+      xmlns:fx="http://javafx.com/fxml/1"
+      fx:controller="com.example.HelloController"
+      spacing="20" 
+      alignment="CENTER"
+      styleClass="p-10, bg-gray-100">
+
+    <Label text="Welcome to TailwindFX!" 
+           styleClass="text-2xl, font-bold, text-blue-600"/>
+
+    <Label text="This is an example project using the Maven plugin"
+           styleClass="text-lg, text-gray-700"/>
+
+    <Button text="Click Me" 
+            styleClass="bg-blue-500, hover:bg-blue-700, text-white, font-bold, py-2, px-4, rounded"/>
+
+    <Label fx:id="welcomeText" 
+           styleClass="text-sm, text-green-600"/>
+
+</VBox>

src/main/java/io/github/yasmramos/tailwindfx/TwInstall.java

@@ -71,14 +71,15 @@ private static void installGeneratedBaseCss(Scene scene, int priority) {
     String generatedCss = generator.generateBaseCss();
 
     // Properly encode CSS for data URL (RFC 2397)
-    String encodedCss = java.net.URLEncoder.encode(generatedCss, java.nio.charset.StandardCharsets.UTF_8)
-        .replace("+", "%20")
-        .replace("%3A", ":")
-        .replace("%3B", ";")
-        .replace("%7B", "{")
-        .replace("%7D", "}")
-        .replace("%23", "#");
-
+    String encodedCss =
+        java.net.URLEncoder.encode(generatedCss, java.nio.charset.StandardCharsets.UTF_8)
+            .replace("+", "%20")
+            .replace("%3A", ":")
+            .replace("%3B", ";")
+            .replace("%7B", "{")
+            .replace("%7D", "}")
+            .replace("%23", "#");
+
     String dataUrl = "data:text/css;charset=utf-8," + encodedCss;
 
     var sheets = scene.getStylesheets();

src/main/java/io/github/yasmramos/tailwindfx/core/ThemeCssGenerator.java

@@ -39,20 +39,24 @@ public String generateBaseCss() {
     generateShadowVariables(css);
 
     css.append("}\n");
-    
+
     // Validate CSS structure
     String result = css.toString();
     if (!result.trim().endsWith("}")) {
       throw new IllegalStateException("Generated CSS does not end with closing brace");
     }
-    
+
     long openBraces = result.chars().filter(ch -> ch == '{').count();
     long closeBraces = result.chars().filter(ch -> ch == '}').count();
     if (openBraces != closeBraces) {
       throw new IllegalStateException(
-          "CSS brace mismatch: " + openBraces + " opening braces, " + closeBraces + " closing braces");
+          "CSS brace mismatch: "
+              + openBraces
+              + " opening braces, "
+              + closeBraces
+              + " closing braces");
     }
-    
+
     return result;
   }
 

tailwindfx-maven-plugin/pom.xml

@@ -4,7 +4,7 @@
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
-    <groupId>io.github.yasmramos.tailwindfx</groupId>
+    <groupId>io.github.yasmramos</groupId>
     <artifactId>tailwindfx-maven-plugin</artifactId>
     <version>1.0-SNAPSHOT</version>
     <packaging>maven-plugin</packaging>