Java tutorial
/* ****************************************************************************** * Copyright (c) 2006-2012 XMind Ltd. and others. * * This file is a part of XMind 3. XMind releases 3 and * above are dual-licensed under the Eclipse Public License (EPL), * which is available at http://www.eclipse.org/legal/epl-v10.html * and the GNU Lesser General Public License (LGPL), * which is available at http://www.gnu.org/licenses/lgpl.html * See http://www.xmind.net/license.html for details. * * Contributors: * XMind Ltd. - initial API and implementation *******************************************************************************/ package org.xmind.ui.internal.dnd; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.eclipse.draw2d.geometry.Dimension; import org.eclipse.draw2d.geometry.Point; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.MessageDialogWithToggle; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.dnd.DND; import org.eclipse.swt.dnd.FileTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.dnd.TransferData; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.internal.DPIUtil; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.xmind.core.IFileEntry; import org.xmind.core.ITopic; import org.xmind.core.IWorkbook; import org.xmind.core.util.FileUtils; import org.xmind.core.util.HyperlinkUtils; import org.xmind.gef.GEF; import org.xmind.gef.IViewer; import org.xmind.gef.Request; import org.xmind.gef.draw2d.geometry.Geometry; import org.xmind.gef.part.IPart; import org.xmind.ui.internal.MindMapUIPlugin; import org.xmind.ui.internal.dialogs.DialogMessages; import org.xmind.ui.internal.protocols.FilePathParser; import org.xmind.ui.mindmap.MindMapUI; import org.xmind.ui.prefs.PrefConstants; import org.xmind.ui.util.ImageFormat; import org.xmind.ui.util.Logger; @SuppressWarnings("restriction") public class FileDndClient extends MindMapDNDClientBase { private static final String CREATE_IMAGE = "CREATE_IMAGE"; //$NON-NLS-1$ private static final String ADD_EXTERNAL_FILE = "dndConfirm.ExternalFile"; //$NON-NLS-1$ private class FileDropHandler { private String path; private String active; public FileDropHandler(String path, String action) { this.path = path; this.active = action; } public void createViewerElements(IWorkbook workbook, ITopic targetParent, List<Object> elements) { File file = new File(path); if (PrefConstants.CREATE_HYPERLINK.equals(active)) { elements.add(createFileHyperlinkTopic(workbook, file)); } else if (PrefConstants.CREATE_ATTACHMENT.equals(active)) { elements.add(createAttachmentTopic(workbook, file, null)); } else if (CREATE_IMAGE.equals(active)) { if (targetParent != null) { elements.add(createImageOnTopic(workbook, targetParent, file)); } } } private ITopic createFileHyperlinkTopic(IWorkbook workbook, File file) { ITopic topic = workbook.createTopic(); topic.setTitleText(file.getName()); topic.setHyperlink(FilePathParser.toURI(file.getAbsolutePath(), false)); return topic; } private ITopic createAttachmentTopic(IWorkbook workbook, File file, ITopic parent) { ITopic topic = workbook.createTopic(); topic.setTitleText(file.getName()); if (file.isDirectory()) { String[] subfiles = file.list(); for (int i = 0; i < subfiles.length; i++) { File subfile = new File(file, subfiles[i]); ITopic subtopic = createAttachmentTopic(workbook, subfile, topic); topic.add(subtopic, ITopic.ATTACHED); } } else { try { IFileEntry entry = workbook.getManifest().createAttachmentFromFilePath(file.getAbsolutePath()); entry.decreaseReference(); entry.increaseReference(); if (isImagePath(file.getAbsolutePath())) { Dimension size = getImageSize(file.getAbsolutePath()); if (size != null) { topic.getImage().setSource(HyperlinkUtils.toAttachmentURL(entry.getPath())); topic.getImage().setSize(size.width, size.height); topic.setTitleText(""); //$NON-NLS-1$ } else { topic.setHyperlink(HyperlinkUtils.toAttachmentURL(entry.getPath())); } } else { topic.setHyperlink(HyperlinkUtils.toAttachmentURL(entry.getPath())); } } catch (IOException e) { Logger.log(e, "Error occurred when transfering file: " //$NON-NLS-1$ + file.getAbsolutePath()); } } return topic; } private Object createImageOnTopic(IWorkbook workbook, ITopic topic, File file) { try { IFileEntry entry = workbook.getManifest().createAttachmentFromFilePath(file.getAbsolutePath()); entry.decreaseReference(); entry.increaseReference(); Dimension size = getImageSize(file.getAbsolutePath()); if (size != null) { return createModifyImageCommand(topic, HyperlinkUtils.toAttachmentURL(entry.getPath()), size.width, size.height, null); } else { Logger.log("[FileDndClient] Failed to open invalid image file: " //$NON-NLS-1$ + file.getAbsolutePath()); } } catch (IOException e) { Logger.log(e, "Error occurred when transfering file: " //$NON-NLS-1$ + file.getAbsolutePath()); } return null; } } private FileTransfer transfer = FileTransfer.getInstance(); private IPreferenceStore pref = null; public Object getData(Transfer transfer, TransferData data) { if (transfer == this.transfer) { return this.transfer.nativeToJava(data); } return null; } public Transfer getTransfer() { return transfer; } public Object toTransferData(Object[] viewerElements, IViewer viewer) { return null; } @Override protected Object[] toViewerElements(Object transferData, Request request, IWorkbook workbook, ITopic targetParent, boolean dropInParent) { if (transferData instanceof String[]) { String[] paths = (String[]) transferData; if (workbook != null) { List<FileDropHandler> handlers = createFileDropHandlers(paths, request.getIntParameter(GEF.PARAM_DROP_OPERATION, DND.DROP_DEFAULT), dropInParent, request.getTargetViewer().getControl().getShell()); if (handlers != null) { List<Object> elements = new ArrayList<Object>(handlers.size()); for (FileDropHandler handler : handlers) { handler.createViewerElements(workbook, targetParent, elements); } return elements.toArray(); } } } return null; } private List<FileDropHandler> createFileDropHandlers(String[] paths, int operation, boolean dropInParent, Shell shell) { List<FileDropHandler> handlers = new ArrayList<FileDropHandler>(paths.length); if (isSingleImage(paths) && dropInParent) { createImageFileDropHandler(paths[0], operation, handlers); } else if (isSingleFolder(paths)) { createSingleFolderDropHandler(paths[0], operation, handlers, shell); } else if (isSingleFile(paths)) { createSingleFileDropHandler(paths[0], operation, handlers, shell); } else { createMultipleFilesDropHandler(paths, operation, handlers, shell); } return handlers; } private void createImageFileDropHandler(String imagePath, int operation, List<FileDropHandler> handlers) { if (operation == DND.DROP_LINK) { createFileDropHandlers(handlers, PrefConstants.CREATE_HYPERLINK, imagePath); } else { createFileDropHandlers(handlers, CREATE_IMAGE, imagePath); } } private void createSingleFolderDropHandler(String path, int operation, List<FileDropHandler> handlers, Shell shell) { if (operation == DND.DROP_LINK) { createFileDropHandlers(handlers, PrefConstants.CREATE_HYPERLINK, path); } else if (operation == DND.DROP_COPY) { createFileDropHandlers(handlers, PrefConstants.CREATE_ATTACHMENT, path); } else { askForConfirmation(shell, DialogMessages.DND_ExternalFolder, ADD_EXTERNAL_FILE, NLS.bind(DialogMessages.DND_ExternalFolder_confirmation_with_path, path), handlers, path); } } private void createSingleFileDropHandler(String path, int operation, List<FileDropHandler> handlers, Shell shell) { if (operation == DND.DROP_LINK) { createFileDropHandlers(handlers, PrefConstants.CREATE_HYPERLINK, path); } else if (operation == DND.DROP_COPY) { createFileDropHandlers(handlers, PrefConstants.CREATE_ATTACHMENT, path); } else { askForConfirmation(shell, DialogMessages.DND_ExternalFile, ADD_EXTERNAL_FILE, NLS.bind(DialogMessages.DND_ExternalFile_confirmation_with_path_size, path, org.xmind.ui.viewers.FileUtils.fileLengthToString(new File(path).length())), handlers, path); } } private void createMultipleFilesDropHandler(String[] paths, int operation, List<FileDropHandler> handlers, Shell shell) { if (operation == DND.DROP_LINK) { createFileDropHandlers(handlers, PrefConstants.CREATE_HYPERLINK, paths); } else if (operation == DND.DROP_COPY) { createFileDropHandlers(handlers, PrefConstants.CREATE_ATTACHMENT, paths); } else { StringBuffer sb = new StringBuffer(paths.length * 30); for (int i = 0; i < paths.length; i++) { File file = new File(paths[i]); if (i < 3) { if (i > 0) { sb.append('\r'); sb.append('\n'); } sb.append(paths[i]); if (!file.isDirectory()) { sb.append(' '); sb.append('('); long size = file.length(); sb.append(org.xmind.ui.viewers.FileUtils.fileLengthToString(size)); sb.append(')'); } } else { sb.append('\r'); sb.append('\n'); sb.append(NLS.bind(DialogMessages.DND_MultipleExternalFiles_moreFiles_with_number, paths.length - 3)); break; } } askForConfirmation(shell, DialogMessages.DND_MultipleExternalFiles, ADD_EXTERNAL_FILE, NLS.bind(DialogMessages.DND_MultipleExternalFiles_confirmation_with_fileList, sb.toString()), handlers, paths); } } private void askForConfirmation(Shell shell, String itemName, String prefKey, String dialogMessage, List<FileDropHandler> handlers, String... paths) { String active = getPref().getString(prefKey); if ("".equals(active) || PrefConstants.ASK_USER.equals(active)) { //$NON-NLS-1$ active = null; } if (active == null) { shell.forceActive(); MessageDialogWithToggle dialog = new MessageDialogWithToggle(shell, NLS.bind(DialogMessages.DND_ConfirmDroppingFileDialog_title_with_type, itemName), null, // dialogMessage, // SWT.ICON_QUESTION, // new String[] { // DialogMessages.DND_ConfirmDroppingFileDialog_LinkButton_text, // DialogMessages.DND_ConfirmDroppingFileDialog_CopyButton_text, // IDialogConstants.CANCEL_LABEL // }, 0, // NLS.bind(DialogMessages.DND_ConfirmDroppingFileDialog_RememberCheck_text_with_type, itemName), false); int ret = dialog.open(); if (ret == IDialogConstants.INTERNAL_ID) { active = PrefConstants.CREATE_HYPERLINK; } else if (ret == IDialogConstants.INTERNAL_ID + 1) { active = PrefConstants.CREATE_ATTACHMENT; } if (dialog.getToggleState() && active != null) { getPref().setValue(prefKey, active); } } if (active != null) { createFileDropHandlers(handlers, active, paths); } } private void createFileDropHandlers(List<FileDropHandler> handlers, String action, String... paths) { for (int i = 0; i < paths.length; i++) { handlers.add(new FileDropHandler(paths[i], action)); } } private IPreferenceStore getPref() { if (pref == null) { pref = MindMapUIPlugin.getDefault().getPreferenceStore(); } return pref; } private static boolean isSingleImage(String[] paths) { return paths.length == 1 && isImagePath(paths[0]); } private static boolean isImagePath(String path) { String ext = FileUtils.getExtension(path); return ImageFormat.findByExtension(ext, null) != null; } private static boolean isSingleFolder(String[] paths) { return paths.length == 1 && new File(paths[0]).isDirectory(); } private static boolean isSingleFile(String[] paths) { return paths.length == 1; } private static Dimension getImageSize(String path) { try { Image tempImage = new Image(Display.getCurrent(), path); Rectangle imageBounds = tempImage.getBounds(); tempImage.dispose(); boolean needZoom = DPIUtil.getDeviceZoom() > 100; int width = needZoom ? imageBounds.width / 2 : imageBounds.width; int height = needZoom ? imageBounds.height / 2 : imageBounds.height; return Geometry.getScaledConstrainedSize(width, height, MindMapUI.IMAGE_INIT_WIDTH, MindMapUI.IMAGE_INIT_HEIGHT); } catch (Throwable e) { } return null; } public boolean canLink(TransferData data, IViewer viewer, Point location, IPart target) { return true; } }