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package eu.etaxonomy.taxeditor.molecular.editor.e4.handler;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Scanner;
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import javax.inject.Named;
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import org.eclipse.e4.core.di.annotations.CanExecute;
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import org.eclipse.e4.core.di.annotations.Execute;
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import org.eclipse.e4.ui.model.application.ui.basic.MPart;
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import org.eclipse.e4.ui.services.IServiceConstants;
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import org.eclipse.jface.dialogs.MessageDialog;
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import org.eclipse.swt.dnd.TextTransfer;
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import org.eclipse.swt.widgets.Shell;
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import eu.etaxonomy.taxeditor.molecular.editor.e4.AlignmentEditorE4;
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import eu.etaxonomy.taxeditor.molecular.l10n.Messages;
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import info.bioinfweb.libralign.alignmentarea.AlignmentArea;
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import info.bioinfweb.libralign.alignmentarea.order.SequenceOrder;
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import info.bioinfweb.libralign.alignmentarea.selection.SelectionModel;
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import info.bioinfweb.libralign.model.AlignmentModel;
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import info.bioinfweb.libralign.model.utils.AlignmentModelUtils;
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/**
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* Handler that pastes the current contents of the clipboard into an active instance of {@link AlignmentEditorE4}.
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*
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* @author Ben Stöver
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* @date 26.08.2015
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*/
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public class AlignmentEditorPasteHandlerE4 {
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private void pasteString(AlignmentArea area, String sequenceID, String content) {
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area.getActionProvider().deleteSelection(); // Overwrite selected tokens.
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area.getActionProvider().elongateSequence(sequenceID, area.getSelection().getCursorColumn());
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@SuppressWarnings("unchecked")
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AlignmentModel<Object> alignmentModel = (AlignmentModel<Object>)area.getAlignmentModel();
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alignmentModel.insertTokensAt(sequenceID, area.getSelection().getCursorColumn(),
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AlignmentModelUtils.charSequenceToTokenList(content, alignmentModel.getTokenSet(),
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true, alignmentModel.getTokenSet().getGapToken()));
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}
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@Execute
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protected void execute(@Named(IServiceConstants.ACTIVE_PART)MPart activePart,
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@Named(IServiceConstants.ACTIVE_SHELL)Shell shell) {
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AlignmentEditorE4 editor = (AlignmentEditorE4) activePart.getObject();
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AlignmentArea focusedArea = editor.getFocusedArea();
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SelectionModel selection = focusedArea.getSelection();
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String clipboardText = (String)editor.CLIPBOARD.getContents(TextTransfer.getInstance());
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if (clipboardText != null) {
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List<String> lines = new ArrayList<String>();
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Scanner scanner = new Scanner(clipboardText);
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try {
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while (scanner.hasNext()) {
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lines.add(scanner.nextLine());
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}
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if (lines.get(lines.size() - 1).equals("")) { //$NON-NLS-1$
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lines.remove(lines.size() - 1);
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}
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}
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finally {
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scanner.close();
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}
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if (!lines.isEmpty()) { //TODO Can lines be empty? (Can an empty string "" be copied to the clipboard?)
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if (selection.getCursorHeight() == 1) { // If the consensus sequence is focused, this is the only possible case.
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String sequenceID = focusedArea.getSequenceOrder().idByIndex(selection.getCursorRow());
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if (lines.size() == 1) {
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pasteString(focusedArea, sequenceID, lines.get(0));
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}
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else {
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MessageDialog dialog = new MessageDialog(shell,
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Messages.AlignmentEditorPasteHandler_PASTING_LINES, null,
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String.format(Messages.AlignmentEditorPasteHandler_PASTING_LINES_QUESTION, lines.size()),
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MessageDialog.QUESTION,
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new String[]{Messages.AlignmentEditorPasteHandler_PASTING_LINES_IGNORE,
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Messages.AlignmentEditorPasteHandler_PASTING_LINES_FIRST_LINE, Messages.AlignmentEditorPasteHandler_CANCEL},
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0);
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//TODO Does the dialog have to be disposed in some way?
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switch (dialog.open()) {
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case 0: // Paste all lines in one sequence.
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pasteString(focusedArea, sequenceID, clipboardText);
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break;
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case 1: // Paste only first line.
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pasteString(focusedArea, sequenceID, lines.get(0));
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break;
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}
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}
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}
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else {
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if (selection.getCursorHeight() == lines.size()) {
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SequenceOrder order = focusedArea.getSequenceOrder();
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for (int i = 0; i < selection.getCursorHeight(); i++) {
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pasteString(focusedArea, order.idByIndex(selection.getCursorRow() + i), lines.get(i)); // Multiple calls of deleteSelection() in here are unnecessary, but should have no effect.
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}
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}
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else {
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MessageDialog.openError(shell,
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Messages.AlignmentEditorPasteHandler_PASTE_FAILURE,
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String.format(Messages.AlignmentEditorPasteHandler_PASTE_FAILURE_MESSAGE, selection.getCursorHeight(), lines.size(), System.getProperty("line.separator"))); //$NON-NLS-1$
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}
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}
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}
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}
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}
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@CanExecute
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public boolean isEnabled(@Named(IServiceConstants.ACTIVE_PART)MPart activePart) {
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AlignmentEditorE4 editor = (AlignmentEditorE4) activePart.getObject();
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AlignmentArea focusedArea = editor.getFocusedArea();
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focusedArea = editor.getFocusedArea();
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return (focusedArea != null);
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}
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}
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