| /******************************************************************************* |
| * Copyright (c) 2000, 2015 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.help.internal.base; |
| |
| import java.util.ArrayList; |
| import java.util.Observable; |
| import java.util.StringTokenizer; |
| |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.core.runtime.preferences.IEclipsePreferences; |
| import org.eclipse.core.runtime.preferences.InstanceScope; |
| import org.eclipse.help.IHelpResource; |
| import org.eclipse.help.internal.base.util.TString; |
| import org.osgi.service.prefs.BackingStoreException; |
| |
| /** |
| * Code for bookmark management has been moved here so that it can be shared |
| * between the web app and the help view. The manager implements Observable so |
| * that views can be notified on bookmark changes. The webapp does not use this |
| * feature. |
| * |
| * @since 3.1 |
| */ |
| public class BookmarkManager extends Observable { |
| // all bookmarks removed |
| public static final int REMOVE_ALL = 1; |
| |
| // bookmark added |
| public static final int ADD = 2; |
| |
| // bookmark removed |
| public static final int REMOVE = 3; |
| |
| // bookmark changed |
| public static final int CHANGE = 4; |
| |
| // everything changed (by the webapp) |
| public static final int WORLD_CHANGED = 5; |
| |
| private ArrayList<Bookmark> bookmarks; |
| |
| public static class Bookmark implements IHelpResource { |
| private String label; |
| |
| private String href; |
| |
| public Bookmark(String label, String href) { |
| this.label = label; |
| this.href = href; |
| } |
| |
| @Override |
| public String getHref() { |
| return href; |
| } |
| |
| @Override |
| public String getLabel() { |
| return label; |
| } |
| |
| @Override |
| public boolean equals(Object object) { |
| if (object == null) |
| return false; |
| if (object == this) |
| return true; |
| if (object instanceof Bookmark) { |
| Bookmark b = (Bookmark) object; |
| return b.href.equals(href) && b.label.equals(label); |
| } |
| return false; |
| } |
| } |
| |
| public static class BookmarkEvent { |
| private int type; |
| |
| private Bookmark bookmark; |
| |
| public BookmarkEvent(int type, Bookmark bookmark) { |
| this.type = type; |
| this.bookmark = bookmark; |
| } |
| |
| public int getType() { |
| return type; |
| } |
| |
| public Bookmark getBookmark() { |
| return bookmark; |
| } |
| } |
| |
| public BookmarkManager() { |
| } |
| |
| public void close() { |
| } |
| |
| public void addBookmark(String bookmarkURL, String title) { |
| if (bookmarkURL != null && bookmarkURL.length() > 0 |
| && !bookmarkURL.equals("about:blank")) { //$NON-NLS-1$ |
| if (title == null) { |
| return; |
| } |
| String bookmarks = readBookmarks(); |
| |
| // separate the url and title by vertical bar |
| |
| // check for duplicates |
| if (bookmarks.indexOf("," + encode(bookmarkURL) + "|") != -1) //$NON-NLS-1$ //$NON-NLS-2$ |
| return; |
| bookmarks = bookmarks |
| + "," + encode(bookmarkURL) + "|" + encode(title); //$NON-NLS-1$ //$NON-NLS-2$ |
| saveBookmarks(bookmarks); |
| Bookmark bookmark = new Bookmark(title, bookmarkURL); |
| if (this.bookmarks!=null) |
| this.bookmarks.add(bookmark); |
| setChanged(); |
| notifyObservers(new BookmarkEvent(ADD, bookmark)); |
| } |
| } |
| |
| public void removeBookmark(String bookmarkURL, String title) { |
| removeBookmark(new Bookmark(title, bookmarkURL)); |
| } |
| |
| public void removeBookmark(Bookmark bookmark) { |
| String bookmarkURL = bookmark.getHref(); |
| String title = bookmark.getLabel(); |
| if (bookmarkURL != null && bookmarkURL.length() > 0 |
| && !bookmarkURL.equals("about:blank")) { //$NON-NLS-1$ |
| if (title == null) { |
| return; |
| } |
| String bookmarks = readBookmarks(); |
| String removeString = "," + encode(bookmarkURL) + "|" + encode(title); //$NON-NLS-1$ //$NON-NLS-2$ |
| int i = bookmarks.indexOf(removeString); |
| if (i == -1) |
| return; |
| bookmarks = bookmarks.substring(0, i) |
| + bookmarks.substring(i + removeString.length()); |
| saveBookmarks(bookmarks); |
| if (this.bookmarks!=null) |
| this.bookmarks.remove(bookmark); |
| setChanged(); |
| notifyObservers(new BookmarkEvent(REMOVE, bookmark)); |
| } |
| } |
| |
| public void removeAllBookmarks() { |
| saveBookmarks(""); //$NON-NLS-1$ |
| if (bookmarks!=null) |
| bookmarks.clear(); |
| setChanged(); |
| notifyObservers(new BookmarkEvent(REMOVE_ALL, null)); |
| } |
| |
| public IHelpResource[] getBookmarks() { |
| if (bookmarks==null) { |
| String value = readBookmarks(); |
| StringTokenizer tokenizer = new StringTokenizer(value, ","); //$NON-NLS-1$ |
| bookmarks = new ArrayList<>(); |
| while (tokenizer.hasMoreTokens()) { |
| String bookmark = tokenizer.nextToken(); |
| // url and title are separated by vertical bar |
| int separator = bookmark.indexOf('|'); |
| String label = decode(bookmark.substring(separator + 1)); |
| String href = separator < 0 ? "" //$NON-NLS-1$ |
| : decode(bookmark.substring(0, separator)); |
| bookmarks.add(new Bookmark(label, href)); |
| } |
| } |
| return bookmarks.toArray(new IHelpResource[bookmarks.size()]); |
| } |
| |
| /** |
| * Ensures that string does not contains ',' or '|' characters. |
| * |
| * @param s |
| * @return String |
| */ |
| private static String encode(String s) { |
| s = TString.change(s, "\\", "\\escape"); //$NON-NLS-1$ //$NON-NLS-2$ |
| s = TString.change(s, ",", "\\comma"); //$NON-NLS-1$ //$NON-NLS-2$ |
| return TString.change(s, "|", "\\pipe"); //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| |
| private static String decode(String s) { |
| s = TString.change(s, "\\pipe", "|"); //$NON-NLS-1$ //$NON-NLS-2$ |
| s = TString.change(s, "\\comma", ","); //$NON-NLS-1$ //$NON-NLS-2$ |
| return TString.change(s, "\\escape", "\\"); //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| |
| private String readBookmarks() { |
| return Platform.getPreferencesService().getString(HelpBasePlugin.PLUGIN_ID, BaseHelpSystem.BOOKMARKS, "", null); //$NON-NLS-1$ |
| } |
| |
| private void saveBookmarks(String bookmarks) { |
| IEclipsePreferences prefs = InstanceScope.INSTANCE.getNode(HelpBasePlugin.PLUGIN_ID); |
| prefs.put(BaseHelpSystem.BOOKMARKS, bookmarks); |
| try { |
| prefs.flush(); |
| } catch (BackingStoreException e) { |
| } |
| } |
| |
| } |