Source Code Cross Referenced for HelpSearchPanel.java in  » Swing-Library » jEdit » org » gjt » sp » jedit » help » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Swing Library » jEdit » org.gjt.sp.jedit.help 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * HelpSearchPanel.java - Help search GUI
003:         * :tabSize=8:indentSize=8:noTabs=false:
004:         * :folding=explicit:collapseFolds=1:
005:         *
006:         * Copyright (C) 2002 Slava Pestov
007:         *
008:         * This program is free software; you can redistribute it and/or
009:         * modify it under the terms of the GNU General Public License
010:         * as published by the Free Software Foundation; either version 2
011:         * of the License, or any later version.
012:         *
013:         * This program is distributed in the hope that it will be useful,
014:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
015:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
016:         * GNU General Public License for more details.
017:         *
018:         * You should have received a copy of the GNU General Public License
019:         * along with this program; if not, write to the Free Software
020:         * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
021:         */
022:
023:        package org.gjt.sp.jedit.help;
024:
025:        //{{{ Imports
026:        import javax.swing.*;
027:        import java.awt.event.*;
028:        import java.awt.*;
029:        import java.util.*;
030:        import org.gjt.sp.jedit.gui.*;
031:        import org.gjt.sp.jedit.io.VFSManager;
032:        import org.gjt.sp.jedit.*;
033:        import org.gjt.sp.util.Log;
034:
035:        //}}}
036:
037:        public class HelpSearchPanel extends JPanel {
038:            //{{{ HelpSearchPanel constructor
039:            public HelpSearchPanel(HelpViewerInterface helpViewer) {
040:                super (new BorderLayout(6, 6));
041:
042:                this .helpViewer = helpViewer;
043:
044:                Box box = new Box(BoxLayout.X_AXIS);
045:                box.add(new JLabel(jEdit
046:                        .getProperty("helpviewer.search.caption")));
047:                box.add(Box.createHorizontalStrut(6));
048:                box
049:                        .add(searchField = new HistoryTextField(
050:                                "helpviewer.search"));
051:                searchField.addActionListener(new ActionHandler());
052:
053:                add(BorderLayout.NORTH, box);
054:
055:                results = new JList();
056:                results.addMouseListener(new MouseHandler());
057:                results.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
058:                results.setCellRenderer(new ResultRenderer());
059:                add(BorderLayout.CENTER, new JScrollPane(results));
060:            } //}}}
061:
062:            //{{{ Private members
063:            private HelpViewerInterface helpViewer;
064:            private HistoryTextField searchField;
065:            private JList results;
066:            private HelpIndex index;
067:
068:            private HelpIndex getHelpIndex() {
069:                if (index == null) {
070:                    index = new HelpIndex();
071:                    try {
072:                        index.indexEditorHelp();
073:                    } catch (Exception e) {
074:                        index = null;
075:                        Log.log(Log.ERROR, this , e);
076:                        GUIUtilities.error(helpViewer.getComponent(),
077:                                "helpviewer.search.error", new String[] { e
078:                                        .toString() });
079:                    }
080:                }
081:
082:                return index;
083:            } //}}}
084:
085:            //{{{ ResultIcon class
086:            static class ResultIcon implements  Icon {
087:                private static RenderingHints renderingHints;
088:
089:                static {
090:                    Map<RenderingHints.Key, Object> hints = new HashMap<RenderingHints.Key, Object>();
091:
092:                    hints.put(RenderingHints.KEY_RENDERING,
093:                            RenderingHints.VALUE_RENDER_QUALITY);
094:                    hints.put(RenderingHints.KEY_ANTIALIASING,
095:                            RenderingHints.VALUE_ANTIALIAS_ON);
096:
097:                    renderingHints = new RenderingHints(hints);
098:                }
099:
100:                private int rank;
101:
102:                ResultIcon(int rank) {
103:                    this .rank = rank;
104:                }
105:
106:                public int getIconWidth() {
107:                    return 40;
108:                }
109:
110:                public int getIconHeight() {
111:                    return 9;
112:                }
113:
114:                public void paintIcon(Component c, Graphics g, int x, int y) {
115:                    Graphics2D g2d = (Graphics2D) g.create();
116:                    g2d.setRenderingHints(renderingHints);
117:
118:                    for (int i = 0; i < 4; i++) {
119:                        if (rank > i)
120:                            g2d
121:                                    .setColor(UIManager
122:                                            .getColor("Label.foreground"));
123:                        else
124:                            g2d.setColor(UIManager
125:                                    .getColor("Label.disabledForeground"));
126:                        g2d.fillOval(x + i * 10, y, 9, 9);
127:                    }
128:                }
129:            } //}}}
130:
131:            //{{{ ResultRenderer class
132:            static class ResultRenderer extends DefaultListCellRenderer {
133:                public Component getListCellRendererComponent(JList list,
134:                        Object value, int index, boolean isSelected,
135:                        boolean cellHasFocus) {
136:                    super .getListCellRendererComponent(list, null, index,
137:                            isSelected, cellHasFocus);
138:
139:                    if (value instanceof  String) {
140:                        setIcon(null);
141:                        setText((String) value);
142:                    } else {
143:                        Result result = (Result) value;
144:                        setIcon(new ResultIcon(result.rank));
145:                        setText(result.title);
146:                    }
147:
148:                    return this ;
149:                }
150:            } //}}}
151:
152:            //{{{ Result class
153:            static class Result {
154:                String file;
155:                String title;
156:                int rank;
157:
158:                Result(HelpIndex.HelpFile file, int count) {
159:                    this .file = file.file;
160:                    this .title = file.title;
161:                    rank = count;
162:                }
163:            } //}}}
164:
165:            //{{{ ResultCompare class
166:            static class ResultCompare implements  Comparator<Result> {
167:                public int compare(Result r1, Result r2) {
168:                    if (r1.rank == r2.rank)
169:                        return r1.title.compareTo(r2.title);
170:                    else
171:                        return r2.rank - r1.rank;
172:                }
173:            } //}}}
174:
175:            //{{{ ActionHandler class
176:            class ActionHandler implements  ActionListener {
177:                public void actionPerformed(ActionEvent evt) {
178:                    final HelpIndex index = getHelpIndex();
179:                    if (index == null)
180:                        return;
181:
182:                    results.setListData(new String[] { jEdit
183:                            .getProperty("helpviewer.searching") });
184:
185:                    final String text = searchField.getText();
186:                    final Vector<Result> resultModel = new Vector<Result>();
187:
188:                    VFSManager.runInWorkThread(new Runnable() {
189:                        public void run() {
190:                            StringTokenizer st = new StringTokenizer(text,
191:                                    ",.;:-? ");
192:
193:                            // we later use this to compute a relative ranking
194:                            int maxRank = 0;
195:
196:                            while (st.hasMoreTokens()) {
197:                                String word = st.nextToken().toLowerCase();
198:                                HelpIndex.Word lookup = index.lookupWord(word);
199:                                if (lookup == null)
200:                                    continue;
201:
202:                                for (int i = 0; i < lookup.occurCount; i++) {
203:                                    HelpIndex.Word.Occurrence occur = lookup.occurrences[i];
204:
205:                                    boolean ok = false;
206:
207:                                    HelpIndex.HelpFile file = index
208:                                            .getFile(occur.file);
209:                                    for (int j = 0; j < resultModel.size(); j++) {
210:                                        Result result = resultModel
211:                                                .elementAt(j);
212:                                        if (result.file.equals(file.file)) {
213:                                            result.rank += occur.count;
214:                                            result.rank += 20; // multiple files w/ word bonus
215:                                            maxRank = Math.max(result.rank,
216:                                                    maxRank);
217:                                            ok = true;
218:                                            break;
219:                                        }
220:                                    }
221:
222:                                    if (!ok) {
223:                                        maxRank = Math
224:                                                .max(occur.count, maxRank);
225:                                        resultModel.addElement(new Result(file,
226:                                                occur.count));
227:                                    }
228:                                }
229:                            }
230:
231:                            if (maxRank != 0) {
232:                                // turn the rankings into relative rankings, from 1 to 4
233:                                for (int i = 0; i < resultModel.size(); i++) {
234:                                    Result result = resultModel.elementAt(i);
235:                                    result.rank = (int) Math
236:                                            .ceil((double) result.rank * 4
237:                                                    / maxRank);
238:                                }
239:
240:                                Collections.sort(resultModel,
241:                                        new ResultCompare());
242:                            }
243:                        }
244:                    });
245:
246:                    VFSManager.runInAWTThread(new Runnable() {
247:                        public void run() {
248:                            if (resultModel.isEmpty()) {
249:                                results
250:                                        .setListData(new String[] { jEdit
251:                                                .getProperty("helpviewer.no-results") });
252:
253:                                getToolkit().beep();
254:                            } else
255:                                results.setListData(resultModel);
256:                        }
257:                    });
258:
259:                }
260:            } //}}}
261:
262:            //{{{ MouseHandler class
263:            public class MouseHandler extends MouseAdapter {
264:                public void mouseReleased(MouseEvent evt) {
265:                    int row = results.locationToIndex(evt.getPoint());
266:                    if (row != -1) {
267:                        Result result = (Result) results.getModel()
268:                                .getElementAt(row);
269:                        helpViewer.gotoURL(result.file, true, 0);
270:                    }
271:                }
272:            } //}}}
273:        }
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