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ControllerManager.java
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ControllerManager.java
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package org.fulib.fx.controller;
import dagger.Lazy;
import io.reactivex.rxjava3.disposables.Disposable;
import javafx.beans.value.WritableValue;
import javafx.event.EventHandler;
import javafx.event.EventType;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.util.Pair;
import org.fulib.fx.FulibFxApp;
import org.fulib.fx.annotation.controller.*;
import org.fulib.fx.annotation.event.onDestroy;
import org.fulib.fx.annotation.event.onInit;
import org.fulib.fx.annotation.event.onKey;
import org.fulib.fx.annotation.event.onRender;
import org.fulib.fx.annotation.param.Param;
import org.fulib.fx.annotation.param.Params;
import org.fulib.fx.annotation.param.ParamsMap;
import org.fulib.fx.controller.building.ControllerBuildFactory;
import org.fulib.fx.controller.exception.IllegalControllerException;
import org.fulib.fx.data.disposable.RefreshableCompositeDisposable;
import org.fulib.fx.util.*;
import org.fulib.fx.util.reflection.Reflection;
import org.jetbrains.annotations.ApiStatus;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.annotations.Unmodifiable;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.io.File;
import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;
import static org.fulib.fx.util.FrameworkUtil.error;
/**
* Manages the initialization, rendering and destroying of controllers.
* <p>
* This class is used internally by the framework and should not be used directly.
*/
@Singleton
@ApiStatus.Internal
public class ControllerManager {
// Map of controllers that have been initialized
private final RefreshableCompositeDisposable cleanup = new RefreshableCompositeDisposable();
private static ResourceBundle defaultResourceBundle;
private final Map<Object, Collection<Pair<onKey.Target, EventHandler<KeyEvent>>>> keyEventHandlers = new HashMap<>();
@Inject
Lazy<FulibFxApp> app;
@Inject
public ControllerManager() {
}
/**
* Initializes and renders the given controller. Calls the onInit and onRender methods. See {@link #init(Object, Map)} and {@link #render(Object, Map)}.
* <p>
* The controller/component instance(s) will be added to the set of initialized controllers and will be destroyed when a new main controller is set.
*
* @param instance The controller instance
* @param parameters The parameters to pass to the controller
* @return The rendered controller
*/
public Parent initAndRender(Object instance, Map<String, Object> parameters) {
// Initialize the controller
init(instance, parameters, true);
// Render the controller
return render(instance, parameters);
}
/**
* Initializes the given controller/component. Calls the onInit method(s) and recursively initializes all subcomponents.
* <p>
* <b>Order:</b> Controller -> Subcomponents -> Subcomponents of subcomponents -> ...
*
* @param instance The controller/component instance
* @param parameters The parameters to pass to the controller/component
* @param disposeOnNewMainController Whether the controller/component should be destroyed when a new main controller is set
* @return A disposable that can be used to destroy the controller/component and all its subcomponents manually
*/
public Disposable init(@NotNull Object instance, @NotNull Map<@NotNull String, @Nullable Object> parameters, boolean disposeOnNewMainController) {
Disposable disposable = Disposable.fromRunnable(() -> destroy(instance));
init(instance, parameters);
if (disposeOnNewMainController) {
this.cleanup.add(disposable);
}
return disposable;
}
/**
* Initializes the given controller/component.
* Calls the onInit method(s) and recursively initializes all sub-controllers.
* <p>
* All initialized controllers will be added to the list of initialized controllers.
* If a controller/component is added to the list, all its subcomponents will follow right after it.
*
* @param instance The controller/component instance
* @param parameters The parameters to pass to the controller
*/
public void init(@NotNull Object instance, @NotNull Map<@NotNull String, @Nullable Object> parameters) {
// Check if the instance is a controller
if (!ControllerUtil.isController(instance))
throw new IllegalControllerException(error(1001).formatted(instance.getClass().getName()));
// Inject parameters into the controller fields
fillParametersIntoFields(instance, parameters);
// Call parameter setter methods
callParamMethods(instance, parameters);
callParamsMethods(instance, parameters);
callParamsMapMethods(instance, parameters);
// Call the onInit method(s)
callMethodsWithAnnotation(instance, onInit.class, parameters);
// Initialize all sub-controllers
Reflection.callMethodsForFieldInstances(instance, getSubComponentFields(instance), (subController) -> init(subController, parameters));
}
/**
* Renders the given controller/component instance. Renders all sub-controllers recursively and then calls the onRender method(s) before returning the rendered controller.
* <p>
* <b>Important:</b> This method assumes that the controller has already been initialized.
* The controller will <u>not automatically be destroyed</u> when using only this method.
* Use {@link #init(Object, Map, boolean)} before, to initialize and automatically destroy the controller or destroy it yourself afterward.
* <p>
* If the controller specifies a fxml file in its {@link Controller#view()},
* it will be loaded and the controller will be set as the controller of the fxml file.
* <p>
* If the controller is a component (extends from a JavaFX Parent), the component itself will be rendered and returned.
* This can be combined with the {@link Component#view()} to set the controller as the root of the fxml file.
* <p>
* If the controller specifies a method as {@link Controller#view()}, the method will be called and the returned Parent will be returned.
* In order to specify a method, the view must start with a '#'. The method must be in the controller class and must return a (subclass of) Parent.
* Example: {@code @Controller(view = "#getView")} will call the method {@code Parent getView()} in the controller.
*
* @param instance The controller instance
* @param parameters The parameters to pass to the controller
* @return The rendered controller/component
*/
public Parent render(Object instance, Map<String, Object> parameters) {
// Check if the instance is a controller/component
boolean component = instance.getClass().isAnnotationPresent(Component.class) && ControllerUtil.isComponent(instance);
if (!component && !instance.getClass().isAnnotationPresent(Controller.class))
throw new IllegalArgumentException(error(1001).formatted(instance.getClass().getName()));
// Render all sub-controllers
Reflection.callMethodsForFieldInstances(instance, getSubComponentFields(instance), (subController) -> render(subController, parameters));
// Get the view of the controller
Parent parent;
String view = component ?
instance.getClass().getAnnotation(Component.class).view() :
instance.getClass().getAnnotation(Controller.class).view();
// If the controller extends from a javafx Parent, render it
// This can be combined with the view annotation to set the controller as the root of the fxml file
if (component) {
if (view.isEmpty()) {
parent = (Parent) instance;
} else {
Parent root = (Parent) instance;
// Due to the way JavaFX works, we have to clear the children list of the old root before loading its fxml file again
ReflectionUtil.getChildrenList(instance.getClass(), root).clear();
parent = loadFXML(view, instance, true);
}
}
// If the controller specifies a method as view, call it
else if (view.startsWith("#")) {
String methodName = view.substring(1);
try {
Method method = instance.getClass().getDeclaredMethod(methodName);
if (method.getParameterCount() != 0) {
throw new RuntimeException(error(1008).formatted(methodName, instance.getClass().getName()));
}
if (!Parent.class.isAssignableFrom(method.getReturnType()))
throw new RuntimeException(error(1002).formatted(methodName, instance.getClass().getName()));
method.setAccessible(true);
parent = (Parent) method.invoke(instance);
} catch (NoSuchMethodException e) {
throw new RuntimeException(error(1003).formatted(methodName, instance.getClass().getName()), e);
} catch (InvocationTargetException | IllegalAccessException e) {
throw new RuntimeException(error(1004).formatted(methodName, instance.getClass().getName()), e);
}
}
// If the controller specifies a fxml file, load it. This will also load sub-controllers specified in the FXML file
else {
String fxmlPath = view.isEmpty() ? ControllerUtil.transform(instance.getClass().getSimpleName()) + ".fxml" : view;
parent = loadFXML(fxmlPath, instance, false);
}
// Call the onRender method
callMethodsWithAnnotation(instance, onRender.class, parameters);
// Register key events
registerKeyEvents(instance);
return parent;
}
/**
* Registers all key events for the given controller instance.
*
* @param instance The controller instance
*/
private void registerKeyEvents(Object instance) {
Reflection.getMethodsWithAnnotation(instance.getClass(), onKey.class).forEach(method -> {
onKey annotation = method.getAnnotation(onKey.class);
EventType<KeyEvent> type = annotation.type().asEventType();
switch (annotation.target()) {
case SCENE -> {
EventHandler<KeyEvent> handler = createKeyEventHandler(method, instance, annotation);
keyEventHandlers.computeIfAbsent(instance, k -> new HashSet<>()).add(new Pair<>(onKey.Target.SCENE, handler));
app.get().stage().getScene().addEventFilter(type, handler);
}
case STAGE -> {
EventHandler<KeyEvent> handler = createKeyEventHandler(method, instance, annotation);
keyEventHandlers.computeIfAbsent(instance, k -> new HashSet<>()).add(new Pair<>(onKey.Target.STAGE, handler));
app.get().stage().addEventFilter(type, handler);
}
}
});
}
/**
* Destroys the given controller/component by calling all methods annotated with {@link onDestroy}.
* <p>
* <b>Important:</b> Do not use this method on a controller's view but on the controller itself.
* <p>
* If the controller has subcomponents, they will be destroyed first recursively in reverse order.
* <p>
* If the controller has an undestroyed Subscriber field, a warning will be logged in development mode.
*
* @param instance The controller/component instance to destroy
*/
public void destroy(@NotNull Object instance) {
if (!ControllerUtil.isController(instance))
throw new IllegalArgumentException(error(1001).formatted(instance.getClass().getName()));
// Destroying should be done in exactly the reverse order of initialization
List<Field> subComponentFields = new ArrayList<>(getSubComponentFields(instance));
Collections.reverse(subComponentFields);
// Destroy all sub-controllers
Reflection.callMethodsForFieldInstances(instance, subComponentFields, this::destroy);
// Call destroy methods
callMethodsWithAnnotation(instance, onDestroy.class, Map.of());
// Unregister key events
cleanUpListeners(instance);
// In development mode, check for undestroyed subscribers
if (FrameworkUtil.runningInDev()) {
Reflection.getFieldsOfType(instance.getClass(), Subscriber.class) // Get all Subscriber fields
.map(field -> {
try {
field.setAccessible(true);
return new Pair<>(field, (Subscriber) field.get(instance)); // Get the Subscriber instance, if it exists
} catch (IllegalAccessException e) {
return null;
}
})
.filter(Objects::nonNull)
.filter(pair -> pair.getKey() != null)
.filter(pair -> !pair.getValue().isDisposed()) // Filter out disposed subscribers
.forEach(pair ->
FulibFxApp.LOGGER.warning("Found undestroyed subscriber '%s' in class '%s'.".formatted(pair.getKey().getName(), instance.getClass().getName()))
);
}
}
/**
* Destroys all controllers that have been initialized and are currently displayed.
*/
public void cleanup() {
cleanup.dispose();
cleanup.refresh();
}
/**
* Loads a fxml file using a custom controller factory.
* This method is used internally by the framework and should not be used directly.
* <p>
* If the fxml file contains an element with a controller class annotated with {@link Controller},
* an instance provided by the router will be used as the controller for the element.
*
* @param fileName The name of the fxml resource file (with path and file extension)
* @param instance The controller instance to use
* @return A parent representing the fxml file
*/
private @NotNull Parent loadFXML(@NotNull String fileName, @NotNull Object instance, boolean setRoot) {
URL url = instance.getClass().getResource(fileName);
if (url == null) {
String urlPath = instance.getClass().getPackageName().replace(".", "/") + "/" + fileName;
throw new RuntimeException(error(2000).formatted(urlPath));
}
File file = FileUtil.getResourceAsLocalFile(FulibFxApp.resourcesPath(), instance.getClass(), fileName);
// If the file exists, use it instead of the resource (development mode, allows for hot reloading)
if (file.exists()) {
try {
url = file.toURI().toURL();
} catch (MalformedURLException e) {
throw new RuntimeException(error(2001).formatted(file.getAbsolutePath()), e);
}
}
// Set the controller factory and builder factory
ControllerBuildFactory builderFactory = new ControllerBuildFactory(instance);
FXMLLoader loader = new FXMLLoader(url);
loader.setControllerFactory(c -> instance);
loader.setBuilderFactory(builderFactory);
// If the controller has a resource bundle, use it
ResourceBundle resourceBundle = getResourceBundle(instance);
if (resourceBundle != null) {
loader.setResources(resourceBundle);
}
// Set the root of the FXML file when a component specifies a view
if (setRoot) {
loader.setRoot(instance);
}
// Load the FXML file
try {
return loader.load();
} catch (IOException exception) {
throw new RuntimeException(error(2002).formatted(instance.getClass()), exception);
}
}
/**
* Returns the resource bundle of the given instance if it has one.
* If no resource bundle is set, the default resource bundle will be used.
* If no default resource bundle is set, null will be returned.
*
* @param instance The instance to get the resource bundle from
* @return The resource bundle of the given instance if it has one or the default resource bundle
* @throws RuntimeException If the instance has more than one field annotated with {@link Resource}
*/
private static @Nullable ResourceBundle getResourceBundle(@NotNull Object instance) {
List<Field> fields = Reflection.getFieldsWithAnnotation(instance.getClass(), Resource.class).toList();
if (fields.isEmpty())
return defaultResourceBundle;
if (fields.size() > 1)
throw new RuntimeException(error(2003).formatted(instance.getClass().getName()));
return fields
.stream()
.filter(field -> {
if (field.getType().isAssignableFrom(ResourceBundle.class))
return true;
throw new RuntimeException(error(2004).formatted(field.getName(), instance.getClass().getName()));
})
.map(field -> {
try {
field.setAccessible(true);
return (ResourceBundle) field.get(instance);
} catch (IllegalAccessException e) {
throw new RuntimeException(error(2005).formatted(field.getName(), instance.getClass().getName()), e);
}
})
.filter(Objects::nonNull)
.findFirst()
.orElse(defaultResourceBundle);
}
/**
* Returns a list of all fields in the given instance that are annotated with {@link SubComponent}.
*
* @param instance The instance to get the fields from
* @return A list of all fields in the given instance that are annotated with {@link SubComponent}
*/
@Unmodifiable
private List<Field> getSubComponentFields(Object instance) {
return Reflection.getFieldsWithAnnotation(instance.getClass(), SubComponent.class)
.filter(field -> {
if (!field.getType().isAnnotationPresent(Component.class)) {
FulibFxApp.LOGGER.warning(error(6005).formatted(field.getName(), instance.getClass().getName()));
return false;
}
return true;
}).toList();
}
/**
* Returns a comparator that compares methods based on the value of the given annotation.
* The method assumes that the annotation has a method called 'value' that returns an integer value.
*
* @param annotation The annotation to compare
* @return A comparator that compares methods based on the value of the given annotation
*/
private static Comparator<Method> annotationComparator(@NotNull Class<? extends Annotation> annotation) {
return (m1, m2) -> {
Annotation event1 = m1.getAnnotation(annotation);
Annotation event2 = m2.getAnnotation(annotation);
try {
Method value = annotation.getDeclaredMethod("value");
return Integer.compare((int) value.invoke(event1), (int) value.invoke(event2));
} catch (ReflectiveOperationException e) {
return 0;
}
};
}
/**
* Calls all methods annotated with a certain annotation in the provided controller. The method will be called with the given parameters if they're annotated with @Param or @Params.
*
* @param annotation The annotation to look for
* @param parameters The parameters to pass to the methods
*/
private void callMethodsWithAnnotation(@NotNull Object instance, @NotNull Class<? extends Annotation> annotation, @NotNull Map<@NotNull String, @Nullable Object> parameters) {
for (Method method : Reflection.getMethodsWithAnnotation(instance.getClass(), annotation).sorted(annotationComparator(annotation)).toList()) {
try {
method.setAccessible(true);
method.invoke(instance, getApplicableParameters(method, parameters));
} catch (IllegalAccessException | InvocationTargetException e) {
throw new RuntimeException(error(1005).formatted(method.getName(), annotation.getName(), instance.getClass().getName()), e);
}
}
}
/**
* Fills the parameters map into the fields annotated with @Param and @ParamsMap in the given instance.
* (Parameter/Map injection into fields)
*
* @param instance The instance to fill the parameters into
* @param parameters The parameters to fill into the fields
*/
private void fillParametersIntoFields(@NotNull Object instance, @NotNull Map<@NotNull String, @Nullable Object> parameters) {
// Fill the parameters into fields annotated with @Param
for (Field field : Reflection.getFieldsWithAnnotation(instance.getClass(), Param.class).toList()) {
try {
boolean accessible = field.canAccess(instance);
field.setAccessible(true);
// If the field is a WriteableValue, use the setValue method
if (WritableValue.class.isAssignableFrom(field.getType())) {
field.get(instance).getClass().getMethod("setValue", Object.class).invoke(field.get(instance), parameters.get(field.getAnnotation(Param.class).value()));
} else {
Object value = parameters.get(field.getAnnotation(Param.class).value());
if (value == null) { // If the value is null, we don't need to check the type
field.set(instance, null);
} else if (Reflection.canBeAssigned(field.getType(), value)) {
field.set(instance, value);
} else {
throw new RuntimeException(error(4007).formatted(field.getAnnotation(Param.class).value(), field.getName(), instance.getClass().getName(), field.getType().getName(), value.getClass().getName()));
}
}
field.setAccessible(accessible);
} catch (IllegalAccessException e) {
throw new RuntimeException(error(4000).formatted(field.getAnnotation(Param.class).value(), field.getName(), instance.getClass().getName()), e);
} catch (InvocationTargetException | NoSuchMethodException e) {
throw new RuntimeException(error(4001).formatted(field.getAnnotation(Param.class).value(), field.getName(), instance.getClass().getName()), e);
}
}
// Fill the parameters into fields annotated with @ParamsMap
for (Field field : Reflection.getFieldsWithAnnotation(instance.getClass(), ParamsMap.class).toList()) {
if (!MapUtil.isMapWithTypes(field, String.class, Object.class)) {
throw new RuntimeException(error(4002).formatted(field.getName(), instance.getClass().getName()));
}
try {
boolean accessible = field.canAccess(instance);
field.setAccessible(true);
// Check if field is final
if (Modifier.isFinal(field.getModifiers())) {
@SuppressWarnings("unchecked")
Map<String, Object> map = (Map<String, Object>) field.get(instance);
map.clear();
map.putAll(parameters);
} else {
field.set(instance, parameters);
}
field.setAccessible(accessible);
} catch (IllegalAccessException e) {
throw new RuntimeException(error(4010).formatted(field.getName(), instance.getClass().getName()), e);
}
}
}
/**
* Calls all methods annotated with @Param in the given instance with the values of the specified parameter.
* (Parameter injection into setters)
*
* @param instance The instance to fill the parameters into
* @param parameters The parameters to fill into the methods
*/
private void callParamMethods(Object instance, Map<String, Object> parameters) {
Reflection.getMethodsWithAnnotation(instance.getClass(), Param.class).forEach(method -> {
try {
method.setAccessible(true);
Object value = parameters.get(method.getAnnotation(Param.class).value());
if (value == null) {
method.invoke(instance, (Object) null);
return;
}
if (Reflection.canBeAssigned(method.getParameterTypes()[0], value)) {
method.invoke(instance, value);
} else {
throw new RuntimeException(error(4008).formatted(method.getAnnotation(Param.class).value(), method.getName(), instance.getClass().getName(), method.getParameterTypes()[0].getName(), value.getClass().getName()));
}
} catch (IllegalAccessException | InvocationTargetException e) {
throw new RuntimeException(error(4005).formatted(method.getAnnotation(Param.class).value(), method.getName(), instance.getClass().getName()), e);
}
});
}
/**
* Calls all methods annotated with @Params in the given instance with the values of the specified parameters.
* (Multiple parameter injection into methods)
*
* @param instance The instance to fill the parameters into
* @param parameters The parameters to fill into the methods
*/
private void callParamsMethods(Object instance, Map<String, Object> parameters) {
Reflection.getMethodsWithAnnotation(instance.getClass(), Params.class).forEach(method -> {
try {
method.setAccessible(true);
String[] paramNames = method.getAnnotation(Params.class).value();
if (method.getParameters().length != paramNames.length)
throw new RuntimeException(error(4006).formatted(method.getName(), instance.getClass().getName()));
Object[] methodParams = new Object[paramNames.length];
// Fill the parameters into the method
for (int i = 0; i < paramNames.length; i++) {
Object value = parameters.get(paramNames[i]);
if (Reflection.canBeAssigned(method.getParameterTypes()[i], value)) {
methodParams[i] = value;
} else {
throw new RuntimeException(error(4008).formatted(paramNames[i], method.getName(), instance.getClass().getName(), method.getParameterTypes()[i].getName(), value.getClass().getName()));
}
}
method.invoke(instance, methodParams);
} catch (IllegalAccessException | InvocationTargetException e) {
throw new RuntimeException(error(4011).formatted(method.getName(), instance.getClass().getName()), e);
}
});
}
/**
* Fills the parameters map into the methods annotated with @ParamsMap in the given instance.
* (Map injection into setters)
*
* @param instance The instance to fill the parameters into
* @param parameters The parameters to fill into the methods
*/
private void callParamsMapMethods(Object instance, Map<String, Object> parameters) {
Reflection.getMethodsWithAnnotation(instance.getClass(), ParamsMap.class).forEach(method -> {
if (method.getParameterCount() != 1 || !MapUtil.isMapWithTypes(method.getParameters()[0], String.class, Object.class)) {
throw new RuntimeException(error(4003).formatted(method.getName(), instance.getClass().getName()));
}
try {
method.setAccessible(true);
method.invoke(instance, parameters);
} catch (IllegalAccessException | InvocationTargetException e) {
throw new RuntimeException(error(4010).formatted(method.getName(), instance.getClass().getName()), e);
}
});
}
/**
* Returns an array with all parameters that are applicable to the given method in the correct order.
* <p>
* If the method has a parameter annotated with @Param, the value of the parameter with the same key as the annotation will be used.
* <p>
* If the method has a parameter annotated with @ParamsMap, the whole parameters map will be used.
*
* @param method The method to check
* @param parameters The values of the parameters
* @return An array with all applicable parameters
*/
private @Nullable Object @NotNull [] getApplicableParameters(@NotNull Method method, @NotNull Map<String, Object> parameters) {
return Arrays.stream(method.getParameters()).map(parameter -> {
Param param = parameter.getAnnotation(Param.class);
ParamsMap paramsMap = parameter.getAnnotation(ParamsMap.class);
if (param != null && paramsMap != null)
throw new RuntimeException(error(4009).formatted(parameter.getName(), method.getName(), method.getDeclaringClass().getName()));
// Check if the parameter is annotated with @Param and if the parameter is of the correct type
if (param != null) {
if (parameters.containsKey(param.value()) && !Reflection.canBeAssigned(parameter.getType(), parameters.get(param.value()))) {
throw new RuntimeException(error(4008).formatted(param.value(), method.getName(), method.getDeclaringClass().getName(), parameter.getType().getName(), parameters.get(param.value()).getClass().getName()));
}
return parameters.get(param.value());
}
// Check if the parameter is annotated with @Params and if the parameter is of the type Map<String, Object>
if (paramsMap != null) {
if (!MapUtil.isMapWithTypes(parameter, String.class, Object.class)) {
throw new RuntimeException(error(4004).formatted(parameter.getName(), method.getName(), method.getDeclaringClass().getName()));
}
return parameters;
}
return null;
}).toArray();
}
/**
* Sets the default resource bundle for all controllers that don't have a resource bundle set.
*
* @param resourceBundle The default resource bundle
*/
public void setDefaultResourceBundle(ResourceBundle resourceBundle) {
defaultResourceBundle = resourceBundle;
}
/**
* Creates an event handler for the given method and instance that will be called when the specified key event occurs.
*
* @param method The method to call
* @param instance The instance to call the method on
* @param annotation The annotation with the key event information
* @return An event handler for the given method and instance
*/
private EventHandler<KeyEvent> createKeyEventHandler(Method method, Object instance, onKey annotation) {
boolean hasEventParameter = method.getParameterCount() == 1 && method.getParameterTypes()[0].isAssignableFrom(KeyEvent.class);
method.setAccessible(true);
return event -> {
// TODO: Utility method
if ((annotation.code() == KeyCode.UNDEFINED || event.getCode() == annotation.code()) &&
(annotation.character().isEmpty() || event.getCharacter().equals(annotation.character())) &&
(annotation.text().isEmpty() || event.getText().equals(annotation.text())) &&
(event.isShiftDown() || !annotation.shift()) &&
(event.isControlDown() || !annotation.control()) &&
(event.isAltDown() || !annotation.alt()) &&
(event.isMetaDown() || !annotation.meta())
) {
try {
if (hasEventParameter) {
method.invoke(instance, event);
} else {
method.invoke(instance);
}
} catch (IllegalAccessException | InvocationTargetException e) {
throw new RuntimeException("Couldn't call method '" + method.getName() + "' in class '" + instance.getClass().getName() + "' on key event.", e);
}
}
};
}
/**
* Clears all key handlers registered for the given instance.
*
* @param instance The instance to clear the key handlers for
*/
private void cleanUpListeners(Object instance) {
Collection<Pair<onKey.Target, EventHandler<KeyEvent>>> handlers = keyEventHandlers.get(instance);
if (handlers != null) {
for (Pair<onKey.Target, EventHandler<KeyEvent>> handler : handlers) {
switch (handler.getKey()) {
case SCENE -> app.get().stage().getScene().removeEventFilter(KeyEvent.ANY, handler.getValue());
case STAGE -> app.get().stage().removeEventFilter(KeyEvent.ANY, handler.getValue());
}
}
keyEventHandlers.remove(instance);
}
}
/**
* Returns the title of the given controller instance if it has one.
* If the title is a key, the title will be looked up in the resource bundle of the controller.
*
* @param instance The controller instance
* @return The title of the controller
*/
public Optional<String> getTitle(@NotNull Object instance) {
if (!instance.getClass().isAnnotationPresent(Title.class))
return Optional.empty();
String title = instance.getClass().getAnnotation(Title.class).value();
if (title.startsWith("%")) {
title = title.substring(1);
ResourceBundle resourceBundle = getResourceBundle(instance);
if (resourceBundle != null) {
return Optional.of(resourceBundle.getString(title));
}
throw new RuntimeException(error(2006).formatted(title, instance.getClass().getName()));
} else if (title.equals("$name")) {
return Optional.of(ControllerUtil.transform(instance.getClass().getSimpleName()));
}
return Optional.of(title);
}
}