amywu | 3a20567 | 2006-02-23 05:05:23 +0000 | [diff] [blame] | 1 | /******************************************************************************* |
nsandonato | 49ba2ea | 2010-10-05 15:24:10 +0000 | [diff] [blame] | 2 | * Copyright (c) 2006, 2010 IBM Corporation and others. |
amywu | 3a20567 | 2006-02-23 05:05:23 +0000 | [diff] [blame] | 3 | * All rights reserved. This program and the accompanying materials |
| 4 | * are made available under the terms of the Eclipse Public License v1.0 |
| 5 | * which accompanies this distribution, and is available at |
| 6 | * http://www.eclipse.org/legal/epl-v10.html |
| 7 | * |
| 8 | * Contributors: |
| 9 | * IBM Corporation - initial API and implementation |
| 10 | *******************************************************************************/ |
| 11 | package org.eclipse.wst.html.core.internal.contentproperties; |
| 12 | |
| 13 | import org.eclipse.core.resources.IProject; |
| 14 | import org.eclipse.core.resources.IResource; |
| 15 | import org.eclipse.core.resources.ProjectScope; |
| 16 | import org.eclipse.core.runtime.CoreException; |
| 17 | import org.eclipse.core.runtime.IPath; |
| 18 | import org.eclipse.core.runtime.IStatus; |
| 19 | import org.eclipse.core.runtime.Platform; |
| 20 | import org.eclipse.core.runtime.Status; |
| 21 | import org.eclipse.wst.html.core.internal.HTMLCorePlugin; |
| 22 | import org.eclipse.wst.html.core.internal.Logger; |
| 23 | import org.osgi.service.prefs.BackingStoreException; |
| 24 | import org.osgi.service.prefs.Preferences; |
| 25 | |
| 26 | /** |
| 27 | * Properties constants used by HTML. Clients should only read and modify the |
| 28 | * HTML properties programmatically using this class. |
| 29 | * |
| 30 | * @since 1.1 |
| 31 | */ |
| 32 | public class HTMLContentProperties { |
| 33 | static final String HTMLCORE_ID = HTMLCorePlugin.getDefault().getBundle().getSymbolicName(); |
| 34 | private static final String PROJECT_KEY = "<project>"; //$NON-NLS-1$ |
| 35 | |
| 36 | /** |
| 37 | * The default document type to use when none is specified. |
| 38 | * <p> |
| 39 | * Value is of type <code>String</code>. |
| 40 | * </p> |
| 41 | */ |
| 42 | public static final String DOCUMENT_TYPE = "document-type"; //$NON-NLS-1$ |
| 43 | |
| 44 | /** |
| 45 | * Generates a preference key based on resourcePath |
| 46 | * |
| 47 | * @param resourcePath |
| 48 | * the path the key will be based off of |
| 49 | * @return preference key based on resourcePath (basically the |
| 50 | * resourcePath without the filename); PROJECT_KEY if resourcePath |
| 51 | * is null |
| 52 | */ |
| 53 | static String getKeyFor(IPath resourcePath) { |
| 54 | String key = PROJECT_KEY; |
| 55 | if (resourcePath != null && resourcePath.segmentCount() > 1) { |
| 56 | key = resourcePath.removeFirstSegments(1).toString(); |
| 57 | } |
| 58 | return key; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Get the preferences node associated with the given project scope and |
| 63 | * preference key (subNode) If create is true, the preference node will be |
| 64 | * created if one does not already exist |
| 65 | * |
| 66 | * @param project |
| 67 | * the project the preference node is under |
| 68 | * @param preferenceKey |
| 69 | * the subnode/category the preference node is located in |
| 70 | * @param create |
| 71 | * if true, a preference node will be created if one does not |
| 72 | * already exist |
| 73 | * @return Preferences associated with the given project scope and |
| 74 | * preference key. null if one could not be found and create is |
| 75 | * false |
| 76 | */ |
| 77 | static Preferences getPreferences(IProject project, String preferenceKey, boolean create) { |
| 78 | if (create) |
| 79 | // create all nodes down to the one we are interested in |
| 80 | return new ProjectScope(project).getNode(HTMLCORE_ID).node(preferenceKey); |
| 81 | // be careful looking up for our node so not to create any nodes as |
| 82 | // side effect |
| 83 | Preferences node = Platform.getPreferencesService().getRootNode().node(ProjectScope.SCOPE); |
| 84 | try { |
| 85 | // TODO once bug 90500 is fixed, should be as simple as this: |
| 86 | // String path = project.getName() + IPath.SEPARATOR + |
| 87 | // ResourcesPlugin.PI_RESOURCES + IPath.SEPARATOR + |
| 88 | // ENCODING_PREF_NODE; |
| 89 | // return node.nodeExists(path) ? node.node(path) : null; |
| 90 | // for now, take the long way |
| 91 | if (!node.nodeExists(project.getName())) |
| 92 | return null; |
| 93 | node = node.node(project.getName()); |
| 94 | if (!node.nodeExists(HTMLCORE_ID)) |
| 95 | return null; |
| 96 | node = node.node(HTMLCORE_ID); |
| 97 | if (!node.nodeExists(preferenceKey)) |
| 98 | return null; |
| 99 | return node.node(preferenceKey); |
| 100 | } |
| 101 | catch (BackingStoreException e) { |
| 102 | // nodeExists failed |
| 103 | Logger.log(Logger.WARNING_DEBUG, "Could not retrieve preference node", e); //$NON-NLS-1$ |
| 104 | } |
| 105 | return null; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Returns the value for the given key in the given context. |
| 110 | * |
| 111 | * @param key |
| 112 | * The property key |
| 113 | * @param resource |
| 114 | * The current context or <code>null</code> if no context is |
| 115 | * available and the workspace setting should be taken. Note |
| 116 | * that passing <code>null</code> should be avoided. |
| 117 | * @param recurse |
| 118 | * whether the parent should be queried till property is found |
| 119 | * @return Returns the current value for the key. |
| 120 | * @since 1.1 |
| 121 | */ |
| 122 | public static String getProperty(String key, IResource resource, boolean recurse) { |
| 123 | String val = null; |
| 124 | // boolean preferenceFound = false; |
| 125 | if (resource != null) { |
| 126 | IProject project = resource.getProject(); |
| 127 | if (project != null) { |
| 128 | Preferences preferences = getPreferences(project, key, false); |
| 129 | if (preferences != null) { |
| 130 | val = internalGetProperty(resource, recurse, preferences); |
| 131 | // preferenceFound = true; |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | // Workbench preference may not be needed so leave out for now |
| 136 | // // no preferences found - for performance reasons, |
| 137 | // // short-circuit |
| 138 | // // lookup by falling back to workspace's default |
| 139 | // // setting |
| 140 | // if (!preferenceFound) |
| 141 | // val = getWorkbenchPreference(key); |
| 142 | return val; |
| 143 | } |
| 144 | |
| 145 | private static String internalGetProperty(IResource resource, boolean recurse, Preferences preferences) { |
| 146 | String value = preferences.get(getKeyFor(resource.getFullPath()), null); |
| 147 | if (value == null && resource != resource.getProject() && recurse) { |
| 148 | value = preferences.get(getKeyFor(null), null); |
| 149 | } |
| 150 | |
| 151 | // Workbench preference may not be needed so leave out for now |
| 152 | // // ensure we default to the workspace preference if none is found |
| 153 | // return value == null ? getWorkbenchPreference(key) : value; |
| 154 | return value; |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Sets the value for the given key in the given context. |
| 159 | * |
| 160 | * @param key |
| 161 | * The property key |
| 162 | * @param resource |
| 163 | * The current context. Note context cannot be |
| 164 | * <code>null</code>. |
| 165 | * @param value |
| 166 | * The value to set for the key. If value is <code>null</code> |
| 167 | * the key is removed from properties. |
| 168 | * @since 1.1 |
| 169 | */ |
| 170 | public static void setProperty(String key, IResource resource, String value) throws CoreException { |
| 171 | if (resource != null) { |
| 172 | IProject project = resource.getProject(); |
| 173 | if (project != null) { |
| 174 | Preferences preferences = getPreferences(project, key, true); |
nsandonato | 49ba2ea | 2010-10-05 15:24:10 +0000 | [diff] [blame] | 175 | if (value == null) |
amywu | 3a20567 | 2006-02-23 05:05:23 +0000 | [diff] [blame] | 176 | preferences.remove(getKeyFor(resource.getFullPath())); |
| 177 | else |
| 178 | preferences.put(getKeyFor(resource.getFullPath()), value); |
| 179 | try { |
| 180 | // save changes |
| 181 | preferences.flush(); |
| 182 | } |
| 183 | catch (BackingStoreException e) { |
| 184 | throw new CoreException(new Status(IStatus.ERROR, HTMLCORE_ID, IStatus.ERROR, "Unable to set property", e)); //$NON-NLS-1$ |
| 185 | } |
| 186 | } |
| 187 | } |
| 188 | // Workbench preference may not be needed so leave out for now |
| 189 | // just set a preference in the instance scope |
| 190 | // if (!preferenceFound) { |
| 191 | // setWorkbenchPreference(key); |
| 192 | // } |
| 193 | } |
| 194 | } |