Java tutorial
/* * Proton Text - A Markdown text editor * Copyright (C) 2017 Anton Levholm, Ludvig Ekman, Mickaela Sdergren * and Stina Werme * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package edu.chl.proton.control; import com.itextpdf.text.DocumentException; import com.itextpdf.text.pdf.PdfWriter; import com.itextpdf.tool.xml.XMLWorkerHelper; import com.sun.javafx.webkit.Accessor; import com.sun.webkit.WebPage; import edu.chl.proton.model.workspace.IDocumentHandler; import edu.chl.proton.model.workspace.IFileHandler; import edu.chl.proton.model.workspace.IStageHandler; import edu.chl.proton.model.workspace.WorkspaceFactory; import edu.chl.proton.view.popup.TextPrompt; import javafx.application.Platform; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.fxml.FXML; import javafx.scene.Node; import javafx.scene.control.Alert; import javafx.scene.control.ButtonType; import javafx.scene.input.KeyCode; import javafx.scene.input.KeyEvent; import javafx.scene.web.HTMLEditor; import javafx.scene.web.WebView; import javafx.stage.FileChooser; import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.Observable; import java.util.Observer; /** * @author Anton Levholm * Created by antonlevholm on 2017-05-01. * * This class controls all functionality of open tabs (Markdown documents). */ public class MarkdownTabController { private static IFileHandler file; private static IDocumentHandler document; private IStageHandler stage; @FXML private HTMLEditor htmlEditor; @FXML private WebView webView; public void initialize() throws IOException { WorkspaceFactory factory = new WorkspaceFactory(); Observable observable = factory.getWorkspace().getCurrentDocument(); new UpdateView(observable); file = factory.getWorkspace(); document = factory.getWorkspace(); stage = factory.getWorkspace(); hideHTMLEditorToolbars(htmlEditor); htmlEditor.setOnKeyReleased(new EventHandler<KeyEvent>() { @Override public void handle(KeyEvent event) { if (isValidEvent(event)) { document.setText(htmlEditor.getHtmlText()); } } private boolean isValidEvent(KeyEvent event) { return !isSelectAllEvent(event) && ((isPasteEvent(event)) || isCharacterKeyReleased(event)); } private boolean isSelectAllEvent(KeyEvent event) { return event.isShortcutDown() && event.getCode() == KeyCode.A; } private boolean isPasteEvent(KeyEvent event) { return event.isShortcutDown() && event.getCode() == KeyCode.V; } private boolean isCharacterKeyReleased(KeyEvent event) { // Make custom changes here.. switch (event.getCode()) { case ALT: case COMMAND: case CONTROL: case SHIFT: return false; default: return true; } } }); } /** * Hides the default toolbar in HTMLEditor. * @param editor object to remove toolbar from. */ // Found at http://stackoverflow.com/questions/10075841/how-to-hide-the-controls-of-htmleditor private static void hideHTMLEditorToolbars(final HTMLEditor editor) { editor.setVisible(false); Platform.runLater(() -> { Node[] nodes = editor.lookupAll(".tool-bar").toArray(new Node[0]); for (Node node : nodes) { node.setVisible(false); node.setManaged(false); } editor.setVisible(true); }); } /** * Generates a PDF from the HTML String that getHTML() in IDocumentHandler returns. * @throws IOException if typecasting to WebView fails. * @throws DocumentException if the PDF cannot be created. */ @FXML public void onClickGeneratePDF() throws IOException, DocumentException { String path = file.getCurrentDirectory().getPath() + "/untitled.pdf"; String title = "Output filepath"; TextPrompt prompt = new TextPrompt(stage.getStage(), title, path); if ((path = prompt.getResult()) != null) { com.itextpdf.text.Document doc = new com.itextpdf.text.Document(); PdfWriter writer = PdfWriter.getInstance(doc, new FileOutputStream(path)); writer.setInitialLeading(12); doc.open(); XMLWorkerHelper.getInstance().parseXHtml(writer, doc, new ByteArrayInputStream(document.getHTML().getBytes())); doc.close(); } } /** * Creates text template for inserting of links * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickLinkButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "[text about link](http://url here)"); } /** * Creates text template for inserting of headers. * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickHeadingButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "#"); } /** * Creates text template for inserting of bold text. * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickBoldButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "****"); } /** * Creates text template for inserting of italic text. * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickItalicButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "**"); } /** * Creates text template for inserting of quote text. * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickQuoteButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "\n> "); } /** * Inserts image from file directory with help from user through file choosing, * or if image from web: creates text template. * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickImageButton() throws IOException { Alert alert = new Alert(Alert.AlertType.CONFIRMATION, "Is the image in your file system?", ButtonType.YES, ButtonType.NO); alert.showAndWait(); if (alert.getResult() == ButtonType.NO) { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", ""); } else { FileChooser fileChooser = new FileChooser(); fileChooser.setTitle("Choose image"); File file = fileChooser.showOpenDialog(stage.getStage()); if (file != null && file.isFile()) { if (isImage(file.getPath())) { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "![text about image](" + file.toURI() + ")"); } else { Alert alert2 = new Alert(Alert.AlertType.ERROR, "File choosen is not an image."); alert2.showAndWait(); } } } } /** * Creates text template for inserting of code text * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickCodeButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "``````"); } /** * Creates text template for inserting of ordered listing * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickOrderedListButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "\n1. "); } /** * Creates text template for inserting of unordered listing * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickUnorderedListButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "\n* "); } /** * Creates markdown text for horizontal line * @throws IOException if typecasting to WebView fails. */ @FXML public void onClickHorizontalLineButton() throws IOException { WebView webView = (WebView) htmlEditor.lookup("WebView"); WebPage webPage = Accessor.getPageFor(webView.getEngine()); webPage.executeCommand("insertText", "\n*****\n"); } /** * Class used for observing changes in the corresponding tab in the model. */ public class UpdateView implements Observer { Observable observable; UpdateView(Observable observable) { this.observable = observable; observable.addObserver(this); } @Override public void update(Observable o, Object arg) { if (MainController.fileIsOpened()) { String text = document.getText(); htmlEditor.setHtmlText(text); MainController.fileHasOpened(); } String html = document.getHTML(); webView.getEngine().loadContent(html); } } /** * Method for checking file type. * @param string containing the file path. * @return true if the file is an accepted image file. */ private boolean isImage(String string) { if (string.substring(string.length() - 4).equals(".pdf") || string.substring(string.length() - 4).equals(".gif") || string.substring(string.length() - 4).equals(".png") || string.substring(string.length() - 4).equals(".jpg") || string.substring(string.length() - 5).equals(".jpeg") || string.substring(string.length() - 4).equals(".tif") || string.substring(string.length() - 4).equals(".bmp")) { return true; } return false; } }