| 1 | // Jomic - a viewer for comic book archives. |
| 2 | // Copyright (C) 2004-2011 Thomas Aglassinger |
| 3 | // |
| 4 | // This program is free software: you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation, either version 3 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | package net.sf.jomic.common; |
| 17 | |
| 18 | import java.net.URL; |
| 19 | |
| 20 | import javax.help.HelpBroker; |
| 21 | import javax.help.HelpSet; |
| 22 | import javax.help.HelpSetException; |
| 23 | |
| 24 | import net.sf.jomic.tools.LocaleTools; |
| 25 | |
| 26 | /** |
| 27 | * Conveniance methods to simplify interaction with JavaHelp. |
| 28 | * |
| 29 | * @author Thomas Aglassinger |
| 30 | */ |
| 31 | public final class JomicHelpTools |
| 32 | { |
| 33 | private static JomicHelpTools instance; |
| 34 | private HelpBroker helpBroker; |
| 35 | |
| 36 | private HelpSet helpSet; |
| 37 | |
| 38 | private LocaleTools localeTools; |
| 39 | |
| 40 | private JomicHelpTools() { |
| 41 | localeTools = LocaleTools.instance(); |
| 42 | |
| 43 | String helpSetName = "jhelpset.hs"; |
| 44 | ClassLoader loader = JomicHelpTools.class.getClassLoader(); |
| 45 | URL helpSetUrl = HelpSet.findHelpSet(loader, helpSetName); |
| 46 | |
| 47 | try { |
| 48 | if (helpSetUrl == null) { |
| 49 | String message = localeTools.getMessage("errors.cannotFindHelpSet", helpSetName); |
| 50 | |
| 51 | throw new HelpSetException(message); |
| 52 | } |
| 53 | helpSet = new HelpSet(null, helpSetUrl); |
| 54 | helpBroker = helpSet.createHelpBroker(); |
| 55 | } catch (HelpSetException error) { |
| 56 | String message = localeTools.getMessage("errors.cannotLoadOnlineHelp"); |
| 57 | IllegalStateException error2 = new IllegalStateException(message); |
| 58 | |
| 59 | error2.initCause(error); |
| 60 | throw error2; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | public HelpBroker getHelpBroker() { |
| 65 | return helpBroker; |
| 66 | } |
| 67 | |
| 68 | public HelpSet getHelpSet() { |
| 69 | return helpSet; |
| 70 | } |
| 71 | |
| 72 | public static synchronized JomicHelpTools instance() { |
| 73 | if (instance == null) { |
| 74 | instance = new JomicHelpTools(); |
| 75 | } |
| 76 | return instance; |
| 77 | } |
| 78 | } |