Java tutorial
/* * Copyright 2015 Igor Maznitsa. * * 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 com.igormaznitsa.ideamindmap.swing; import com.igormaznitsa.ideamindmap.utils.AllIcons; import com.igormaznitsa.ideamindmap.utils.IdeaUtils; import com.igormaznitsa.meta.common.utils.Assertions; import com.igormaznitsa.mindmap.model.logger.Logger; import com.igormaznitsa.mindmap.model.logger.LoggerFactory; import com.intellij.openapi.application.ApplicationManager; import com.intellij.openapi.command.CommandProcessor; import com.intellij.openapi.command.UndoConfirmationPolicy; import com.intellij.openapi.editor.SelectionModel; import com.intellij.openapi.editor.ex.EditorEx; import com.intellij.openapi.fileTypes.FileTypes; import com.intellij.openapi.project.Project; import com.intellij.openapi.ui.Messages; import com.intellij.openapi.util.TextRange; import com.intellij.ui.EditorTextField; import org.apache.commons.io.FileUtils; import javax.annotation.Nonnull; import javax.swing.JButton; import javax.swing.JPanel; import javax.swing.JToolBar; import javax.swing.SwingUtilities; import javax.swing.filechooser.FileFilter; import java.awt.BorderLayout; import java.awt.Toolkit; import java.awt.datatransfer.Clipboard; import java.awt.datatransfer.DataFlavor; import java.awt.datatransfer.StringSelection; import java.awt.datatransfer.UnsupportedFlavorException; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import java.io.IOException; import java.util.Locale; import java.util.ResourceBundle; public class PlainTextEditor extends JPanel { private static final Logger LOGGER = LoggerFactory.getLogger(PlainTextEditor.class); private static final ResourceBundle BUNDLE = java.util.ResourceBundle.getBundle("/i18n/Bundle"); private static final FileFilter TEXT_FILE_FILTER = new FileFilter() { @Override public boolean accept(final File f) { return f.isDirectory() || f.getName().toLowerCase(Locale.ENGLISH).endsWith(".txt"); //NOI18N } @Override public String getDescription() { return BUNDLE.getString("PlainTextEditor.fileFilter.description"); } }; public static class EmptyTextEditor extends EditorTextField { public EmptyTextEditor(final Project project) { super("", project, FileTypes.PLAIN_TEXT); setOneLineMode(false); setAutoscrolls(true); } @Override protected EditorEx createEditor() { final EditorEx result = super.createEditor(); result.setVerticalScrollbarVisible(true); result.setHorizontalScrollbarVisible(true); return result; } public String getSelectedText() { final SelectionModel model = Assertions.assertNotNull(this.getEditor()).getSelectionModel(); final int start = model.getSelectionStart(); final int end = model.getSelectionEnd(); return getDocument().getText(new TextRange(start, end)); } public void replaceSelection(@Nonnull final String clipboardText) { ApplicationManager.getApplication().runWriteAction(new Runnable() { @Override public void run() { CommandProcessor.getInstance().executeCommand(getProject(), new Runnable() { @Override public void run() { final SelectionModel model = Assertions.assertNotNull(getEditor()).getSelectionModel(); final int start = model.getSelectionStart(); final int end = model.getSelectionEnd(); getDocument().replaceString(start, end, ""); getDocument().insertString(start, clipboardText); } }, null, null, UndoConfirmationPolicy.DEFAULT, getDocument()); } }); } public void clear() { this.setText(""); } } private final EmptyTextEditor editor; public PlainTextEditor(final Project project, final String text) { super(new BorderLayout()); this.editor = new EmptyTextEditor(project); final JToolBar menu = new JToolBar(); final JButton buttonImport = new JButton("Import", AllIcons.Buttons.IMPORT); final PlainTextEditor theInstance = this; buttonImport.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { final File home = new File(System.getProperty("user.home")); //NOI18N final File toOpen = IdeaUtils.chooseFile(theInstance, true, BUNDLE.getString("PlainTextEditor.buttonLoadActionPerformed.title"), home, TEXT_FILE_FILTER); if (toOpen != null) { try { final String text = FileUtils.readFileToString(toOpen, "UTF-8"); //NOI18N editor.setText(text); } catch (Exception ex) { LOGGER.error("Error during text file loading", ex); //NOI18N Messages.showErrorDialog( BUNDLE.getString("PlainTextEditor.buttonLoadActionPerformed.msgError"), "Error"); } } } }); final JButton buttonExport = new JButton("Export", AllIcons.Buttons.EXPORT); buttonExport.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { final File home = new File(System.getProperty("user.home")); //NOI18N final File toSave = IdeaUtils.chooseFile(theInstance, true, BUNDLE.getString("PlainTextEditor.buttonSaveActionPerformed.saveTitle"), home, TEXT_FILE_FILTER); if (toSave != null) { try { final String text = getText(); FileUtils.writeStringToFile(toSave, text, "UTF-8"); //NOI18N } catch (Exception ex) { LOGGER.error("Error during text file saving", ex); //NOI18N Messages.showErrorDialog( BUNDLE.getString("PlainTextEditor.buttonSaveActionPerformed.msgError"), "Error"); } } } }); final JButton buttonCopy = new JButton("Copy", AllIcons.Buttons.COPY); buttonCopy.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { final StringSelection stringSelection = new StringSelection(editor.getSelectedText()); final Clipboard clpbrd = Toolkit.getDefaultToolkit().getSystemClipboard(); clpbrd.setContents(stringSelection, null); } }); final JButton buttonPaste = new JButton("Paste", AllIcons.Buttons.PASTE); buttonPaste.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { try { final String clipboardText = (String) Toolkit.getDefaultToolkit().getSystemClipboard() .getData(DataFlavor.stringFlavor); editor.replaceSelection(clipboardText); } catch (UnsupportedFlavorException ex) { // no text data in clipboard } catch (IOException ex) { LOGGER.error("Error during paste from clipboard", ex); //NOI18N } } }); final JButton buttonClearAll = new JButton("Clear All", AllIcons.Buttons.CLEARALL); buttonClearAll.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { editor.clear(); } }); menu.add(buttonImport); menu.add(buttonExport); menu.add(buttonCopy); menu.add(buttonPaste); menu.add(buttonClearAll); this.add(menu, BorderLayout.NORTH); this.add(editor, BorderLayout.CENTER); // I made so strange trick to move the caret into the start of document, all other ways didn't work :( SwingUtilities.invokeLater(new Runnable() { @Override public void run() { editor.replaceSelection(text); } }); } public String getText() { return this.editor.getText(); } public EmptyTextEditor getEditor() { return this.editor; } }