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1
19
20 package org.netbeans.modules.welcome.content;
21
22 import java.awt.GridBagConstraints  ;
23 import java.io.IOException ;
24 import java.io.InputStream ;
25 import java.net.URL ;
26 import java.util.ArrayList ;
27 import java.util.HashMap ;
28 import java.util.Iterator ;
29 import java.util.Map ;
30 import javax.xml.parsers.ParserConfigurationException ;
31 import org.openide.ErrorManager;
32 import org.openide.filesystems.FileObject;
33 import org.openide.filesystems.Repository;
34 import org.openide.util.Lookup;
35 import org.openide.xml.XMLUtil;
36 import org.xml.sax.Attributes ;
37 import org.xml.sax.InputSource ;
38 import org.xml.sax.SAXException ;
39 import org.xml.sax.SAXParseException ;
40 import org.xml.sax.XMLReader ;
41 import org.xml.sax.helpers.DefaultHandler ;
42
43
48 class ContentParser extends DefaultHandler {
49
50 private static final String ELEM_ROOT = "welcomepage"; private static final String ELEM_BACKGROUND = "background"; private static final String ELEM_PANEL = "panel"; private static final String ELEM_CONSTRAINTS = "constraints";
55 private static final String CURRENT_VERSION = "1.0";
57 private Map <String , Integer > anchors = new HashMap <String , Integer >( 10 );
58 private Map <String , Integer > fills = new HashMap <String , Integer >( 4 );
59
60 private Map <String ,ComponentDescriptor> descriptors = new HashMap <String ,ComponentDescriptor>( 5 );
61 private ArrayList <String > contentIds = new ArrayList <String >( 5 );
62 private String backgroundPainterClassName;
63
64 private ComponentDescriptor currentDescriptor;
65
66 private static final String CONTENT_ROOT_FOLDER = "WelcomePage";
68 public ContentParser() {
69 anchors.put( "CENTER", Integer.valueOf( GridBagConstraints.CENTER ) ); anchors.put( "WEST", Integer.valueOf( GridBagConstraints.WEST ) ); anchors.put( "NORTH", Integer.valueOf( GridBagConstraints.NORTH ) ); anchors.put( "NORTHEAST", Integer.valueOf( GridBagConstraints.NORTHEAST ) ); anchors.put( "NORTHEAST", Integer.valueOf( GridBagConstraints.NORTHEAST ) ); anchors.put( "EAST", Integer.valueOf( GridBagConstraints.EAST ) ); anchors.put( "SOUTH", Integer.valueOf( GridBagConstraints.SOUTH ) ); anchors.put( "SOUTHEAST", Integer.valueOf( GridBagConstraints.SOUTHEAST ) ); anchors.put( "SOUTHWEST", Integer.valueOf( GridBagConstraints.SOUTHWEST ) );
79 fills.put( "NONE", Integer.valueOf( GridBagConstraints.NONE ) ); fills.put( "HORIZONTAL", Integer.valueOf( GridBagConstraints.HORIZONTAL ) ); fills.put( "VERTICAL", Integer.valueOf( GridBagConstraints.VERTICAL ) ); fills.put( "BOTH", Integer.valueOf( GridBagConstraints.BOTH ) ); }
84
85 public void parse() throws ParserConfigurationException , SAXException , IOException {
86 FileObject root = Repository.getDefault().getDefaultFileSystem().findResource( CONTENT_ROOT_FOLDER );
87 if( null != root ) {
88 FileObject[] children = root.getChildren();
89 for( int i=0; i<children.length; i++ ) {
90 FileObject contentFile = children[i];
91 if( contentFile.canRead() && contentFile.isData() ) {
92 parse( contentFile.getInputStream() );
93 }
94 }
95 }
96 }
97
98 public void parseLocal() throws ParserConfigurationException , SAXException , IOException {
99 String layoutFilePath = BundleSupport.getURL( "Layout" ); URL url = new URL (layoutFilePath);
101 parse( url.openStream() );
102 }
103
104 private void parse( InputStream input ) throws ParserConfigurationException , SAXException , IOException {
105 XMLReader reader = XMLUtil.createXMLReader(false, false);
106 reader.setContentHandler(this);
107 reader.parse(new InputSource (input));
108 }
109
110 public ComponentDescriptor[] getContents() {
111 ComponentDescriptor[] res = new ComponentDescriptor[ contentIds.size() ];
112 int index = 0;
113 for( Iterator <String > i=contentIds.iterator(); i.hasNext(); index++ ) {
114 res[index] = descriptors.get( i.next() );
115 }
116 return res;
117 }
118
119 public BackgroundPainter getBackgroundPainter() {
120 BackgroundPainter painter = null;
121 if( null != backgroundPainterClassName ) {
122 ClassLoader loader = (ClassLoader )Lookup.getDefault().lookup( ClassLoader .class );
123 if( null == loader )
124 loader = ClassLoader.getSystemClassLoader();
125 try {
126 Class clazz = Class.forName(backgroundPainterClassName, true, loader );
127 painter = (BackgroundPainter)clazz.newInstance();
128 } catch( Throwable e ) {
129 ErrorManager.getDefault().notify( ErrorManager.INFORMATIONAL, e );
130 }
131 }
132 return painter;
133 }
134
135
136
137 public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
138 if( qName.equals( ELEM_ROOT ) ) {
139
140 String version = attributes.getValue( "version" ); if( !CURRENT_VERSION.equals( version ) ) {
143 throw new SAXParseException ( "Unsupported file version", null ); }
145
146 } else if( qName.equals( ELEM_BACKGROUND ) ) {
147
148 backgroundPainterClassName = attributes.getValue( "class" );
150
151 } else if( qName.equals( ELEM_PANEL ) ) {
152
153 String id = attributes.getValue( "id" ); if( null == id )
156 throw new SAXParseException ( "Required attribute missing: id", null ); String className = attributes.getValue( "class" ); String method = attributes.getValue( "method" ); if( null == className && method == null)
160 throw new SAXParseException ( "Either class or method attribute must be specified", null );
162 ComponentDescriptor descriptor = descriptors.get( id );
163 if( null == descriptor ) {
164 descriptor = new DefaultComponentDescriptor( id );
165 descriptors.put( id, descriptor );
166 }
167
168 descriptor.setClassName( className );
169 descriptor.setMethod( method );
170
171 currentDescriptor = descriptor;
172
173 if( !contentIds.contains( id ) )
174 contentIds.add( id );
175
176 } else if( qName.equals( ELEM_CONSTRAINTS ) ) {
177
178 if( null == currentDescriptor ) {
180 throw new SAXParseException ( "Unexpected element: " + ELEM_CONSTRAINTS, null ); }
182
183 currentDescriptor.setConstraints( parseConstraints( attributes, currentDescriptor.getConstraints() ) );
184 }
185 }
186
187 public void endElement(String uri, String localName, String qName) throws SAXException {
188 if( qName.equals( ELEM_PANEL ) ) {
189 currentDescriptor = null;
190 }
191 }
192
193 private GridBagConstraints parseConstraints( Attributes attrs, GridBagConstraints defaults ) {
194 GridBagConstraints res = defaults;
195 if( null == res )
196 res = new GridBagConstraints ();
197
198 res.gridx = parseInt( attrs, "gridx", 0, 100, res.gridx ); res.gridy = parseInt( attrs, "gridy", 0, 100, res.gridy );
201 res.gridwidth = parseInt( attrs, "gridwidth", 0, 100, res.gridwidth ); res.gridheight = parseInt( attrs, "gridheight", 0, 100, res.gridheight );
204 res.weightx = parseDouble( attrs, "weightx", 0.0, 1.0, res.weightx ); res.weighty = parseDouble( attrs, "weighty", 0.0, 1.0, res.weighty );
207 res.insets.left = parseInt( attrs, "insetsleft", 0, 1000, res.insets.left ); res.insets.right = parseInt( attrs, "insetsright", 0, 1000, res.insets.right ); res.insets.top = parseInt( attrs, "insetstop", 0, 1000, res.insets.top ); res.insets.bottom = parseInt( attrs, "insetsbottom", 0, 1000, res.insets.bottom );
212 String anchor = attrs.getValue( "anchor" ); if( null != anchor ) {
214 anchor = anchor.toUpperCase();
215 Integer intValue = anchors.get( anchor );
216 if( null != intValue ) {
217 res.anchor = intValue.intValue();
218 }
219 }
220
221 String fill = attrs.getValue( "fill" ); if( null != fill ) {
223 fill = fill.toUpperCase();
224 Integer intValue = fills.get( fill );
225 if( null != intValue ) {
226 res.fill = intValue.intValue();
227 }
228 }
229
230 res.ipadx = parseInt( attrs, "padx", 0, 100, res.ipadx ); res.ipady = parseInt( attrs, "pady", 0, 100, res.ipady );
233 return res;
234 }
235
236 private int parseInt( Attributes attrs, String name, int min, int max, int defaultValue ) {
237 int res = defaultValue;
238 String str = attrs.getValue( name );
239 if( null != str ) {
240 try {
241 res = Integer.parseInt( str );
242 } catch( NumberFormatException nfE ) {
243 }
245 if( res < min )
246 res = min;
247 if( res > max )
248 res = max;
249 }
250 return res;
251 }
252
253 private double parseDouble( Attributes attrs, String name, double min, double max, double defaultValue ) {
254 double res = defaultValue;
255 String str = attrs.getValue( name );
256 if( null != str ) {
257 try {
258 res = Double.parseDouble( str );
259 } catch( NumberFormatException nfE ) {
260 }
262 if( res < min )
263 res = min;
264 if( res > max )
265 res = max;
266 }
267 return res;
268 }
269 }
270 |
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