Add image caching

client/src/main/java/envoy/client/ui/controller/ChatScene.java

@@ -132,7 +132,6 @@ public final class ChatScene implements EventListener, Restorable {
 
 	private Chat				currentChat;
 	private FilteredList<Chat>	chats;
-	private boolean				recording;
 	private Attachment			pendingAttachment;
 	private boolean				postingPermanentlyDisabled;
 	private boolean				isCustomAttachmentImage;
@@ -354,7 +353,8 @@ public final class ChatScene implements EventListener, Restorable {
 			// Discard the pending attachment
 			if (recorder.isRecording()) {
 				recorder.cancel();
-				recording = false;
+				voiceButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("microphone", DEFAULT_ICON_SIZE)));
+				voiceButton.setText(null);
 			}
 			pendingAttachment = null;
 			updateAttachmentView(false);
@@ -414,8 +414,7 @@ public final class ChatScene implements EventListener, Restorable {
 	private void voiceButtonClicked() {
 		new Thread(() -> {
 			try {
-				if (!recording) {
+				if (!recorder.isRecording()) {
-					recording = true;
 					Platform.runLater(() -> {
 						voiceButton.setText("Recording");
 						voiceButton.setGraphic(new ImageView(IconUtil.loadIcon("microphone_recording", DEFAULT_ICON_SIZE)));
@@ -425,7 +424,6 @@ public final class ChatScene implements EventListener, Restorable {
 					pendingAttachment = new Attachment(recorder.finish(), "Voice_recording_"
 							+ DateTimeFormatter.ofPattern("yyyy_MM_dd-HH_mm_ss").format(LocalDateTime.now()) + "." + AudioRecorder.FILE_FORMAT,
 							AttachmentType.VOICE);
-					recording			= false;
 					Platform.runLater(() -> {
 						voiceButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("microphone", DEFAULT_ICON_SIZE)));
 						voiceButton.setText(null);

client/src/main/java/envoy/client/util/IconUtil.java

@@ -21,6 +21,9 @@ import envoy.util.EnvoyLog;
  */
 public final class IconUtil {
 
+	private static final HashMap<String, Image>			cache		= new HashMap<>();
+	private static final HashMap<String, BufferedImage>	awtCache	= new HashMap<>();
+
 	private IconUtil() {}
 	
 	/**
@@ -30,7 +33,14 @@ public final class IconUtil {
 	 * @return the loaded image
 	 * @since Envoy Client v0.1-beta
 	 */
-	public static Image load(String path) { return new Image(IconUtil.class.getResource(path).toExternalForm()); }
+	public static Image load(String path) {
+		if (cache.containsKey(path)) return cache.get(path);
+		else {
+			final var image = new Image(IconUtil.class.getResource(path).toExternalForm());
+			cache.put(path, image);
+			return image;
+		}
+	}
 
 	/**
 	 * Loads an image from the resource folder and scales it to the given size.
@@ -39,9 +49,21 @@ public final class IconUtil {
 	 * @param size the size to scale the icon to
 	 * @return the scaled image
 	 * @since Envoy Client v0.1-beta
+	 * @apiNote There is an extraordinarily low chance that there is a size and name
+	 *          conflict. To achieve that however, you basically have to name your
+	 *          image intentionally like that. For normal human readable names or
+	 *          even automatically generated ones it will never occur.
 	 */
 	public static Image load(String path, int size) {
-		return new Image(IconUtil.class.getResource(path).toExternalForm(), size, size, true, true);
+
+		// Minimizing the risk of size and name conflict
+		final var sizeSpecificString = path + size + "+a* ";
+		if (cache.containsKey(sizeSpecificString)) return cache.get(sizeSpecificString);
+		else {
+			final var image = new Image(IconUtil.class.getResource(path).toExternalForm(), size, size, true, true);
+			cache.put(sizeSpecificString, image);
+			return image;
+		}
 	}
 
 	/**
@@ -138,14 +160,20 @@ public final class IconUtil {
 	 * @since Envoy Client v0.2-beta
 	 */
 	public static BufferedImage loadAWTCompatible(String path) {
+		if (awtCache.containsKey(path)) return awtCache.get(path);
+		else {
 			BufferedImage image = null;
 			try {
 				image = ImageIO.read(IconUtil.class.getResource(path));
 			} catch (final IOException e) {
 				EnvoyLog.getLogger(IconUtil.class).log(Level.WARNING, String.format("Could not load image at path %s: ", path), e);
 			}
+
+			// If an IOException occurs we don't assume it'll be fixed on the next call
+			awtCache.put(path, image);
 			return image;
 		}
+	}
 
 	/**
 	 * This method should be called if the display of an image depends upon the