Java tutorial
/* * Copyright [2014] [Christian Loehnert, krampenschiesser@gmail.com] * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package de.ks.text; import com.google.common.base.Charsets; import com.google.common.eventbus.Subscribe; import com.google.common.io.Files; import de.ks.activity.ActivityController; import de.ks.activity.ActivityLoadFinishedEvent; import de.ks.activity.initialization.ActivityCallback; import de.ks.activity.initialization.ActivityInitialization; import de.ks.activity.initialization.DatasourceCallback; import de.ks.application.fxml.DefaultLoader; import de.ks.eventsystem.bus.HandlingThread; import de.ks.eventsystem.bus.Threading; import de.ks.executor.group.LastExecutionGroup; import de.ks.i18n.Localized; import de.ks.javafx.FxCss; import de.ks.javafx.ScreenResolver; import de.ks.text.command.AsciiDocEditorCommand; import de.ks.text.view.AsciiDocContent; import de.ks.text.view.AsciiDocViewer; import javafx.beans.property.SimpleStringProperty; import javafx.fxml.FXML; import javafx.fxml.Initializable; import javafx.geometry.Rectangle2D; import javafx.scene.Node; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.*; import javafx.scene.control.TextArea; import javafx.scene.control.TextField; import javafx.scene.input.KeyCode; import javafx.scene.layout.GridPane; import javafx.scene.layout.HBox; import javafx.scene.layout.RowConstraints; import javafx.scene.layout.StackPane; import javafx.scene.web.WebView; import javafx.stage.FileChooser; import javafx.stage.Modality; import javafx.stage.Stage; import org.apache.commons.lang3.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.enterprise.inject.Instance; import javax.enterprise.inject.spi.CDI; import javax.inject.Inject; import java.awt.*; import java.io.File; import java.io.IOException; import java.net.URI; import java.net.URL; import java.util.*; import java.util.concurrent.CompletableFuture; import java.util.function.Consumer; public class AsciiDocEditor implements Initializable, DatasourceCallback<Object>, ActivityCallback { public static CompletableFuture<DefaultLoader<Node, AsciiDocEditor>> load(Consumer<StackPane> viewConsumer, Consumer<AsciiDocEditor> controllerConsumer) { ActivityInitialization initialization = CDI.current().select(ActivityInitialization.class).get(); return initialization.loadAdditionalControllerWithFuture(AsciiDocEditor.class)// .thenApply(loader -> { viewConsumer.accept((StackPane) loader.getView()); controllerConsumer.accept(loader.getController()); return loader; }); } private static final Logger log = LoggerFactory.getLogger(AsciiDocEditor.class); @Inject @FxCss Instance<String> stylesheets; @Inject AsciiDocParser parser; @Inject ActivityController controller; @Inject ActivityInitialization initialization; @Inject Instance<AsciiDocEditorCommand> editorCommands; @Inject @FxCss Instance<String> cssSheets; @FXML protected TextArea editor; @FXML protected Tab previewTab; @FXML protected Button help; @FXML protected Button saveToFileButton; @FXML protected GridPane mainPane; @FXML protected TabPane tabPane; @FXML protected StackPane root; @FXML protected HBox editorCommandPane; @FXML protected StackPane editorContainer; @FXML protected TextField searchField; @FXML protected TextArea plainHtml; protected File lastFile; protected final SimpleStringProperty text = new SimpleStringProperty(); protected LastExecutionGroup<String> renderGroup; protected Button insertImage = null; protected boolean focusOnEditor = true; protected final Map<Class<?>, AsciiDocEditorCommand> commands = new HashMap<>(); protected Stage previewPopupStage; protected volatile PersistentStoreBack persistentStoreBack; protected volatile LastSearch lastSearch = null; protected AsciiDocViewer preview; protected AsciiDocViewer popupPreview; protected Node previewNode; protected Node popupPreviewNode; @Override public void initialize(URL location, ResourceBundle resources) { initializePreview(); initializePopupPreview(); renderGroup = new LastExecutionGroup<>("adocrender", 500, controller.getExecutorService()); text.bindBidirectional(editor.textProperty()); editor.textProperty().addListener((p, o, n) -> { if (n != null) { renderGroup.schedule(() -> n)// .thenApplyAsync(s -> { storeBack(s); return s; }, controller.getExecutorService())// .thenAcceptAsync(s -> { if (previewTab.isSelected()) { preview.clear(); preview.showDirect(s); } else { preview.preload( Collections.singletonList(new AsciiDocContent(AsciiDocViewer.DEFAULT, s))); } if (previewPopupStage != null) { popupPreview.clear(); popupPreview.showDirect(s); } }, controller.getJavaFXExecutor()); } }); tabPane.focusedProperty().addListener((p, o, n) -> { if (n) { if (tabPane.getSelectionModel().getSelectedIndex() == 0) { if (focusOnEditor) { editor.requestFocus(); } } } else { focusOnEditor = true; } }); tabPane.getSelectionModel().selectedIndexProperty().addListener((p, o, n) -> { if (n != null && n.intValue() == 1) { controller.getJavaFXExecutor().submit(() -> preview.requestFocus()); preview.show(new AsciiDocContent(AsciiDocViewer.DEFAULT, editor.getText())); } if (o == null || n == null) { return; } if (o.intValue() != 0 && n.intValue() == 0) { controller.getJavaFXExecutor().submit(() -> editor.requestFocus()); } }); addCommands(); editor.setOnKeyPressed(e -> { KeyCode code = e.getCode(); if (code == KeyCode.S && e.isControlDown()) { saveToFile(); e.consume(); } if (e.getCode() == KeyCode.P && e.isControlDown()) { showPreviewPopup(); e.consume(); } if (e.getCode() == KeyCode.F && e.isControlDown()) { showSearchField(); e.consume(); } }); searchField.setVisible(false); searchField.setOnKeyPressed(e -> { if (e.getCode() == KeyCode.ENTER) { searchForText(); e.consume(); } }); searchField.setOnKeyReleased(e -> { if (e.getCode() == KeyCode.ESCAPE) { if (searchField.textProperty().getValueSafe().trim().isEmpty()) { searchField.setVisible(false); editor.requestFocus(); } else { searchField.setText(""); } } }); } protected void initializePreview() { DefaultLoader<Node, AsciiDocViewer> previewLoader = initialization .loadAdditionalController(AsciiDocViewer.class); previewNode = previewLoader.getView(); previewTab.setContent(previewNode); preview = previewLoader.getController(); plainHtml.textProperty().bind(preview.currentHtmlProperty()); } protected void initializePopupPreview() { DefaultLoader<Node, AsciiDocViewer> previewLoader = initialization .loadAdditionalController(AsciiDocViewer.class); popupPreviewNode = previewLoader.getView(); popupPreview = previewLoader.getController(); } protected void searchForText() { String searchKey = searchField.textProperty().getValueSafe().toLowerCase(Locale.ROOT); String editorContent = editor.textProperty().getValueSafe().toLowerCase(Locale.ROOT); searchField.setDisable(true); CompletableFuture<Integer> search = CompletableFuture.supplyAsync(() -> { if (lastSearch != null && lastSearch.matches(searchKey, editorContent)) { int startPoint = lastSearch.getPosition() + searchKey.length(); int newPosition; if (startPoint >= editorContent.length()) { newPosition = -1; } else { newPosition = editorContent.substring(startPoint).indexOf(searchKey); if (newPosition >= 0) { newPosition += lastSearch.getPosition() + searchKey.length(); } } if (newPosition == -1) { newPosition = editorContent.indexOf(searchKey); } lastSearch.setPosition(newPosition); return newPosition; } else { int newPosition = editorContent.indexOf(searchKey); lastSearch = new LastSearch(searchKey, editorContent).setPosition(newPosition); return newPosition; } }, controller.getExecutorService()); search.thenAcceptAsync(index -> { searchField.setDisable(false); if (index >= 0) { editor.positionCaret(index); editor.requestFocus(); } }, controller.getJavaFXExecutor()); } protected void showSearchField() { searchField.setVisible(true); searchField.requestFocus(); } protected void storeBack(String storeBack) { if (this.persistentStoreBack != null) { this.persistentStoreBack.save(storeBack); } } private void addCommands() { editorCommands.forEach(c -> { Button button = new Button(); button.setMnemonicParsing(true); button.focusedProperty().addListener((p, o, n) -> { if (n) { focusOnEditor = false; } }); c.initialize(this, button); this.commands.put(c.getClass(), c); button.setText(Localized.get(c.getName())); button.setOnAction(e -> c.execute(editor)); editorCommandPane.getChildren().add(button); }); } @FXML void saveToFile() { FileChooser fileChooser = new FileChooser(); FileChooser.ExtensionFilter htmlFilter = new FileChooser.ExtensionFilter("html", "html"); FileChooser.ExtensionFilter adocFilter = new FileChooser.ExtensionFilter("adoc", "adoc"); fileChooser.getExtensionFilters().add(htmlFilter); fileChooser.getExtensionFilters().add(adocFilter); if (lastFile != null) { fileChooser.setInitialDirectory(lastFile.getParentFile()); fileChooser.setInitialFileName(lastFile.getName()); if (lastFile.getName().endsWith(".html")) { fileChooser.setSelectedExtensionFilter(htmlFilter); } else { fileChooser.setSelectedExtensionFilter(adocFilter); } } else { fileChooser.setInitialFileName("export.html"); } File file = fileChooser.showSaveDialog(saveToFileButton.getScene().getWindow()); if (file == null) { return; } this.lastFile = file; String extension = fileChooser.getSelectedExtensionFilter().getExtensions().get(0); if (!file.getName().endsWith(extension)) { file = new File(file.getPath() + extension); } if (extension.endsWith("adoc")) { try { Files.write(editor.getText(), file, Charsets.UTF_8); } catch (IOException e) { log.error("Could not write file {}", file, e); } } else { this.parser.renderToFile(editor.getText(), AsciiDocBackend.HTML5, file); } } @FXML void showHelp() { String title = Localized.get("help"); title = StringUtils.remove(title, "_"); new Thread(() -> { Desktop desktop = Desktop.getDesktop(); URI uri = URI.create("http://powerman.name/doc/asciidoc"); try { desktop.browse(uri); } catch (IOException e) { log.error("Could not browse {}", uri, e); } }).start(); } @FXML void showPreviewPopup() { if (previewPopupStage == null) { String title = Localized.get("adoc.preview"); previewPopupStage = new Stage(); previewPopupStage.setTitle(title); Scene scene = new Scene(new StackPane(popupPreviewNode)); scene.setOnKeyReleased(e -> { if (e.getCode() == KeyCode.ESCAPE) { previewPopupStage.close(); } }); previewPopupStage.setScene(scene); Rectangle2D bounds = new ScreenResolver().getScreenToShow().getBounds(); previewPopupStage.setX(bounds.getMinX()); previewPopupStage.setY(bounds.getMinY()); previewPopupStage.setWidth(bounds.getWidth()); previewPopupStage.setHeight(bounds.getHeight()); previewPopupStage.initModality(Modality.NONE); previewPopupStage.setOnShowing(e -> { popupPreview.showDirect(getText()); }); previewPopupStage.setOnCloseRequest(e -> this.previewPopupStage = null); previewPopupStage.show(); } } public SimpleStringProperty textProperty() { return text; } public String getText() { return text.getValueSafe(); } public void setText(String text) { this.editor.setText(text); } public void hideActionBar() { RowConstraints rowConstraints = mainPane.getRowConstraints().get(1); rowConstraints.setMinHeight(0.0); rowConstraints.setPrefHeight(0.0); rowConstraints.setMaxHeight(0.0); } public TextArea getEditor() { return editor; } @SuppressWarnings("unchecked") public <T extends AsciiDocEditorCommand> T getCommand(Class<T> clazz) { return (T) commands.get(clazz); } public void selectPreview() { this.tabPane.getSelectionModel().select(1); } public void selectEditor() { this.tabPane.getSelectionModel().select(0); } public WebView getPreview() { return preview.getWebView(); } public AsciiDocEditor setPersistentStoreBack(String id, File dir) { this.persistentStoreBack = new PersistentStoreBack(id, dir); return this; } public boolean removePersistentStoreBack() { if (persistentStoreBack != null) { persistentStoreBack = null; return true; } else { return false; } } @Subscribe @Threading(HandlingThread.JavaFX) public void onRefresh(ActivityLoadFinishedEvent e) { controller.getJavaFXExecutor().submit(() -> { if (editor.textProperty().getValueSafe().trim().isEmpty()) { if (persistentStoreBack != null) { String text = persistentStoreBack.load(); editor.setText(text); } } }); } @Override public void duringLoad(Object model) { //nope } @Override public void duringSave(Object model) { if (persistentStoreBack != null) { persistentStoreBack.delete(); } } @Override public void onSuspend() { controller.getJavaFXExecutor().invokeInJavaFXThread(() -> { if (previewPopupStage != null) { previewPopupStage.close(); } return null; }); } @Override public void onStop() { onSuspend(); } public PersistentStoreBack getPersistentStoreBack() { return persistentStoreBack; } }