[API] Automatic Module Names (#105)

* Initial implementation of Automatic Module Names

* Fix using java 17 for publishing

* Roll build back to jdk 1.8

* Fix package name for imgui.lwjgl3 module

* Reworking package change to prevent breaking backwards compatability

README.md

@@ -121,6 +121,10 @@ dependencies {
 3. Add the jar to your classpath.
 </details>
 
+#### Java Module System
+If using Java 9 modules, you will need to require the `imgui.app` module.
+
+
 ## Binding
 Using binding without the wrapper requires to "attach" it to your application manually.
 You can refer to [imgui-app](https://github.com/SpaiR/imgui-java/blob/v1.86.0/imgui-app) module and see how things are done there.
@@ -247,6 +251,16 @@ dependencies {
  4. Provide a VM option: `imgui.library.path` or `java.library.path`. It should point to the folder where you've placed downloaded native libraries.
 </details>
 
+#### Java Module System
+If using Java 9 modules, imgui-java has Automatic Module Names:
+
+| Package            | Module        |
+|--------------------|---------------|
+| imgui-java-app     | imgui.app     |
+| imgui-java-binding | imgui.binding |
+| imgui-java-lwjgl3  | imgui.lwjgl3  |
+| imgui-java-natives | imgui.natives |
+
 ## Extensions
 - [ImNodes](https://github.com/Nelarius/imnodes/tree/857cc860af05ac0f6a4039c2af33d982377b6cf4) | [Example](https://github.com/SpaiR/imgui-java/blob/v1.86.0/example/src/main/java/ExampleImNodes.java) <br>
   A small, dependency-free node editor for dear imgui. (A good choice for simple start.)

imgui-app/build.gradle

@@ -37,6 +37,9 @@ jar {
         include 'imgui-java64.dll'
         into 'io/imgui/java/native-bin/'
     }
+    manifest {
+        attributes  'Automatic-Module-Name': 'imgui.app'
+    }
 }
 
 shadowJar {

imgui-app/src/main/java/imgui/app/Application.java

@@ -4,7 +4,7 @@ package imgui.app;
  * Application class from which ImGui applications extend.
  * Serves as an abstraction layer to hide all low-level details about window creation and rendering routine.
  *
- * <h3>Life-cycle</h3>
+ * <h2>Life-cycle</h2>
  * <p>The entry point for ImGui applications is the Application class and {@link #launch(Application)} method.
  * It initializes application instance and starts the main application loop.
  *

imgui-binding-natives/build.gradle

@@ -38,6 +38,9 @@ jar {
         include "$libName" // this is fine
         into 'io/imgui/java/native-bin/'
     }
+    manifest {
+        attributes  'Automatic-Module-Name': 'imgui.natives'
+    }
 }
 
 apply from: "$rootDir/publish.gradle"

imgui-binding/build.gradle

@@ -22,3 +22,9 @@ tasks.register('generateLibs', GenerateLibs) {
 
 apply from: "$rootDir/publish.gradle"
 configurePublishing('imgui-java-binding', 'JNI based binding for Dear ImGui')
+
+jar {
+    manifest {
+        attributes  'Automatic-Module-Name': 'imgui.binding'
+    }
+}

imgui-binding/src/main/java/imgui/lwjgl3/glfw/ImGuiImplGlfwNative.java

@@ -1,6 +1,6 @@
-package imgui.glfw;
+package imgui.lwjgl3.glfw;
 
-final class ImGuiImplGlfwNative {
+public final class ImGuiImplGlfwNative {
     private ImGuiImplGlfwNative() {
     }
 
@@ -10,9 +10,15 @@ final class ImGuiImplGlfwNative {
         #endif
      */
 
-    // GLFW hack: Hide icon from task bar
-    // Applied only for windows
-    static native void win32hideFromTaskBar(long hwndPtr); /*
+    /**
+     *  GLFW hack: Hide icon from task bar
+     * Applied only for windows
+     *
+     * Internal Use Only.
+     * FIXME: Once Java Module System has been implemented, this function should only be exported
+     *  to the imgui.lwjgl module.
+     */
+    public static native void win32hideFromTaskBar(long hwndPtr); /*
         #if defined(_WIN32)
             HWND hwnd = (HWND)hwndPtr;
             LONG ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);

imgui-lwjgl3/build.gradle

@@ -17,3 +17,9 @@ dependencies {
 
 apply from: "$rootDir/publish.gradle"
 configurePublishing('imgui-java-lwjgl3', 'Backend LWJGL3 implementation for imgui-java')
+
+jar {
+    manifest {
+        attributes  'Automatic-Module-Name': 'imgui.lwjgl3'
+    }
+}

imgui-lwjgl3/src/main/java/imgui/glfw/ImGuiImplGlfw.java

@@ -20,6 +20,7 @@ import imgui.flag.ImGuiMouseButton;
 import imgui.flag.ImGuiMouseCursor;
 import imgui.flag.ImGuiNavInput;
 import imgui.flag.ImGuiViewportFlags;
+import imgui.lwjgl3.glfw.ImGuiImplGlfwNative;
 import org.lwjgl.PointerBuffer;
 import org.lwjgl.glfw.GLFWCharCallback;
 import org.lwjgl.glfw.GLFWCursorEnterCallback;

publish.gradle

@@ -58,10 +58,12 @@ ext.configurePublishing = { packageName, packageDesc ->
             }
         }
     }
-    signing {
-        def signingKeyId = System.getenv('SIGNING_KEY_ID')
-        def signingKey = System.getenv('SIGNING_KEY')
-        useInMemoryPgpKeys(signingKeyId, signingKey, '')
-        sign publishing.publications.mavenJava
+    if (System.getenv('SIGNING_KEY_ID') != null) {
+        signing {
+            def signingKeyId = System.getenv('SIGNING_KEY_ID')
+            def signingKey = System.getenv('SIGNING_KEY')
+            useInMemoryPgpKeys(signingKeyId, signingKey, '')
+            sign publishing.publications.mavenJava
+        }
     }
 }