1 /*
2 * Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 import java.awt.BorderLayout;
25 import java.awt.Color;
26 import java.awt.Dimension;
27 import java.awt.EventQueue;
28 import java.awt.Font;
29 import java.awt.GridBagConstraints;
30 import java.awt.GridBagLayout;
31 import java.awt.Rectangle;
32 import java.awt.event.ActionEvent;
33 import java.awt.event.ActionListener;
34 import java.awt.event.MouseAdapter;
35 import java.awt.event.MouseEvent;
36 import java.io.File;
37 import java.io.IOException;
38 import java.io.PrintStream;
39 import java.io.PrintWriter;
40 import java.io.StringWriter;
41 import java.lang.reflect.Field;
42 import java.lang.reflect.Modifier;
43 import java.nio.charset.Charset;
44 import java.util.ArrayList;
45 import java.util.Collections;
46 import java.util.HashMap;
47 import java.util.HashSet;
48 import java.util.Iterator;
49 import java.util.List;
50 import java.util.Map;
51 import java.util.Set;
52 import javax.swing.DefaultComboBoxModel;
53 import javax.swing.JComboBox;
54 import javax.swing.JComponent;
55 import javax.swing.JFrame;
56 import javax.swing.JLabel;
57 import javax.swing.JPanel;
58 import javax.swing.JScrollPane;
59 import javax.swing.JTextArea;
60 import javax.swing.JTextField;
61 import javax.swing.SwingUtilities;
62 import javax.swing.event.CaretEvent;
63 import javax.swing.event.CaretListener;
64 import javax.swing.text.BadLocationException;
65 import javax.swing.text.DefaultHighlighter;
66 import javax.swing.text.Highlighter;
67 import javax.tools.Diagnostic;
68 import javax.tools.DiagnosticListener;
69 import javax.tools.JavaFileObject;
70 import javax.tools.StandardJavaFileManager;
71
72 import com.sun.source.tree.CompilationUnitTree;
73 import com.sun.source.util.JavacTask;
74 import com.sun.tools.javac.api.JavacTool;
75 import com.sun.tools.javac.code.Flags;
76 import com.sun.tools.javac.tree.EndPosTable;
77 import com.sun.tools.javac.tree.JCTree;
78 import com.sun.tools.javac.tree.JCTree.JCAnnotatedType;
79 import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
80 import com.sun.tools.javac.tree.JCTree.JCNewClass;
81 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
82 import com.sun.tools.javac.tree.TreeInfo;
83 import com.sun.tools.javac.tree.TreeScanner;
84
85 import static com.sun.tools.javac.tree.JCTree.Tag.*;
86 import static com.sun.tools.javac.util.Position.NOPOS;
87
88 /**
89 * Utility and test program to check validity of tree positions for tree nodes.
90 * The program can be run standalone, or as a jtreg test. In standalone mode,
91 * errors can be displayed in a gui viewer. For info on command line args,
92 * run program with no args.
93 *
94 * <p>
95 * jtreg: Note that by using the -r switch in the test description below, this test
96 * will process all java files in the langtools/test directory, thus implicitly
97 * covering any new language features that may be tested in this test suite.
98 */
99
100 /*
101 * @test
102 * @bug 6919889
103 * @summary assorted position errors in compiler syntax trees
104 * OLD: -q -r -ef ./tools/javac/typeAnnotations -ef ./tools/javap/typeAnnotations -et ANNOTATED_TYPE .
105 * @modules java.desktop
106 * jdk.compiler/com.sun.tools.javac.api
107 * jdk.compiler/com.sun.tools.javac.code
108 * jdk.compiler/com.sun.tools.javac.file
109 * jdk.compiler/com.sun.tools.javac.tree
110 * jdk.compiler/com.sun.tools.javac.util
111 * @run main TreePosTest -q -r .
112 */
113 public class TreePosTest {
114 /**
115 * Main entry point.
116 * If test.src is set, program runs in jtreg mode, and will throw an Error
117 * if any errors arise, otherwise System.exit will be used, unless the gui
118 * viewer is being used. In jtreg mode, the default base directory for file
119 * args is the value of ${test.src}. In jtreg mode, the -r option can be
120 * given to change the default base directory to the root test directory.
121 */
122 public static void main(String... args) throws IOException {
123 String testSrc = System.getProperty("test.src");
124 File baseDir = (testSrc == null) ? null : new File(testSrc);
125 boolean ok = new TreePosTest().run(baseDir, args);
126 if (!ok) {
127 if (testSrc != null) // jtreg mode
128 throw new Error("failed");
129 else
130 System.exit(1);
131 }
132 }
133
134 /**
135 * Run the program. A base directory can be provided for file arguments.
136 * In jtreg mode, the -r option can be given to change the default base
137 * directory to the test root directory. For other options, see usage().
138 * @param baseDir base directory for any file arguments.
139 * @param args command line args
140 * @return true if successful or in gui mode
141 */
142 boolean run(File baseDir, String... args) throws IOException {
143 try {
144 if (args.length == 0) {
145 usage(System.out);
146 return true;
147 }
148
149 List<File> files = new ArrayList<File>();
150 for (int i = 0; i < args.length; i++) {
151 String arg = args[i];
152 if (arg.equals("-encoding") && i + 1 < args.length)
153 encoding = args[++i];
154 else if (arg.equals("-gui"))
155 gui = true;
156 else if (arg.equals("-q"))
157 quiet = true;
158 else if (arg.equals("-v"))
159 verbose = true;
160 else if (arg.equals("-t") && i + 1 < args.length)
161 tags.add(args[++i]);
162 else if (arg.equals("-ef") && i + 1 < args.length)
163 excludeFiles.add(new File(baseDir, args[++i]));
164 else if (arg.equals("-et") && i + 1 < args.length)
165 excludeTags.add(args[++i]);
166 else if (arg.equals("-r")) {
167 if (excludeFiles.size() > 0)
168 throw new Error("-r must be used before -ef");
169 File d = baseDir;
170 while (!new File(d, "TEST.ROOT").exists()) {
171 d = d.getParentFile();
172 if (d == null)
173 throw new Error("cannot find TEST.ROOT");
174 }
175 baseDir = d;
176 }
177 else if (arg.startsWith("-"))
178 throw new Error("unknown option: " + arg);
179 else {
180 while (i < args.length)
181 files.add(new File(baseDir, args[i++]));
182 }
183 }
184
185 for (File file: files) {
186 if (file.exists())
187 test(file);
188 else
189 error("File not found: " + file);
190 }
191
192 if (fileCount != 1)
193 System.err.println(fileCount + " files read");
194 if (errors > 0)
195 System.err.println(errors + " errors");
196
197 return (gui || errors == 0);
198 } finally {
199 fm.close();
200 }
201 }
202
203 /**
204 * Print command line help.
205 * @param out output stream
206 */
207 void usage(PrintStream out) {
208 out.println("Usage:");
209 out.println(" java TreePosTest options... files...");
210 out.println("");
211 out.println("where options include:");
212 out.println("-gui Display returns in a GUI viewer");
213 out.println("-q Quiet: don't report on inapplicable files");
214 out.println("-v Verbose: report on files as they are being read");
215 out.println("-t tag Limit checks to tree nodes with this tag");
216 out.println(" Can be repeated if desired");
217 out.println("-ef file Exclude file or directory");
218 out.println("-et tag Exclude tree nodes with given tag name");
219 out.println("");
220 out.println("files may be directories or files");
221 out.println("directories will be scanned recursively");
222 out.println("non java files, or java files which cannot be parsed, will be ignored");
223 out.println("");
224 }
225
226 /**
227 * Test a file. If the file is a directory, it will be recursively scanned
228 * for java files.
229 * @param file the file or directory to test
230 */
231 void test(File file) {
232 if (excludeFiles.contains(file)) {
233 if (!quiet)
234 error("File " + file + " excluded");
235 return;
236 }
237
238 if (file.isDirectory()) {
239 for (File f: file.listFiles()) {
240 test(f);
241 }
242 return;
243 }
244
245 if (file.isFile() && file.getName().endsWith(".java")) {
246 try {
247 if (verbose)
248 System.err.println(file);
249 fileCount++;
250 PosTester p = new PosTester();
251 p.test(read(file));
252 } catch (ParseException e) {
253 if (!quiet) {
254 error("Error parsing " + file + "\n" + e.getMessage());
255 }
256 } catch (IOException e) {
257 error("Error reading " + file + ": " + e);
258 }
259 return;
260 }
261
262 if (!quiet)
263 error("File " + file + " ignored");
264 }
265
266 // See CR: 6982992 Tests CheckAttributedTree.java, JavacTreeScannerTest.java, and SourceTreeeScannerTest.java timeout
267 StringWriter sw = new StringWriter();
268 PrintWriter pw = new PrintWriter(sw);
269 Reporter r = new Reporter(pw);
270 JavacTool tool = JavacTool.create();
271 StandardJavaFileManager fm = tool.getStandardFileManager(r, null, null);
272
273 /**
274 * Read a file.
275 * @param file the file to be read
276 * @return the tree for the content of the file
277 * @throws IOException if any IO errors occur
278 * @throws TreePosTest.ParseException if any errors occur while parsing the file
279 */
280 JCCompilationUnit read(File file) throws IOException, ParseException {
281 JavacTool tool = JavacTool.create();
282 r.errors = 0;
283 Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(file);
284 JavacTask task = tool.getTask(pw, fm, r, List.of("-proc:none"), null, files);
285 Iterable<? extends CompilationUnitTree> trees = task.parse();
286 pw.flush();
287 if (r.errors > 0)
288 throw new ParseException(sw.toString());
289 Iterator<? extends CompilationUnitTree> iter = trees.iterator();
290 if (!iter.hasNext())
291 throw new Error("no trees found");
292 JCCompilationUnit t = (JCCompilationUnit) iter.next();
293 if (iter.hasNext())
294 throw new Error("too many trees found");
295 return t;
296 }
297
298 /**
299 * Report an error. When the program is complete, the program will either
300 * exit or throw an Error if any errors have been reported.
301 * @param msg the error message
302 */
303 void error(String msg) {
304 System.err.println(msg);
305 errors++;
306 }
307
308 /**
309 * Names for tree tags.
310 */
311 private static String getTagName(JCTree.Tag tag) {
312 String name = tag.name();
313 return (name == null) ? "??" : name;
314 }
315
316 /** Number of files that have been analyzed. */
317 int fileCount;
318 /** Number of errors reported. */
319 int errors;
320 /** Flag: don't report irrelevant files. */
321 boolean quiet;
322 /** Flag: report files as they are processed. */
323 boolean verbose;
324 /** Flag: show errors in GUI viewer. */
325 boolean gui;
326 /** Option: encoding for test files. */
327 String encoding;
328 /** The GUI viewer for errors. */
329 Viewer viewer;
330 /** The set of tags for tree nodes to be analyzed; if empty, all tree nodes
331 * are analyzed. */
332 Set<String> tags = new HashSet<String>();
333 /** Set of files and directories to be excluded from analysis. */
334 Set<File> excludeFiles = new HashSet<File>();
335 /** Set of tag names to be excluded from analysis. */
336 Set<String> excludeTags = new HashSet<String>();
337
338 /**
339 * Main class for testing assertions concerning tree positions for tree nodes.
340 */
341 private class PosTester extends TreeScanner {
342 void test(JCCompilationUnit tree) {
343 sourcefile = tree.sourcefile;
344 endPosTable = tree.endPositions;
345 encl = new Info();
346 tree.accept(this);
347 }
348
349 @Override
350 public void scan(JCTree tree) {
351 if (tree == null)
352 return;
353
354 Info self = new Info(tree, endPosTable);
355 if (check(encl, self)) {
356 // Modifiers nodes are present throughout the tree even where
357 // there is no corresponding source text.
358 // Redundant semicolons in a class definition can cause empty
359 // initializer blocks with no positions.
360 if ((self.tag == MODIFIERS || self.tag == BLOCK)
361 && self.pos == NOPOS) {
362 // If pos is NOPOS, so should be the start and end positions
363 check("start == NOPOS", encl, self, self.start == NOPOS);
364 check("end == NOPOS", encl, self, self.end == NOPOS);
365 } else {
366 // For this node, start , pos, and endpos should be all defined
367 check("start != NOPOS", encl, self, self.start != NOPOS);
368 check("pos != NOPOS", encl, self, self.pos != NOPOS);
369 check("end != NOPOS", encl, self, self.end != NOPOS);
370 // The following should normally be ordered
371 // encl.start <= start <= pos <= end <= encl.end
372 // In addition, the position of the enclosing node should be
373 // within this node.
374 // The primary exceptions are for array type nodes, because of the
375 // need to support legacy syntax:
376 // e.g. int a[]; int[] b[]; int f()[] { return null; }
377 // and because of inconsistent nesting of left and right of
378 // array declarations:
379 // e.g. int[][] a = new int[2][];
380 if (!(encl.tag == REFERENCE && self.tag == ANNOTATED_TYPE)) {
381 check("encl.start <= start", encl, self, encl.start <= self.start);
382 }
383 check("start <= pos", encl, self, self.start <= self.pos);
384 if (!( (self.tag == TYPEARRAY ||
385 isAnnotatedArray(self.tree))
386 && (encl.tag == VARDEF ||
387 encl.tag == METHODDEF ||
388 encl.tag == TYPEARRAY ||
389 isAnnotatedArray(encl.tree))
390 ||
391 encl.tag == ANNOTATED_TYPE && self.tag == SELECT
392 ||
393 encl.tag == REFERENCE && self.tag == ANNOTATED_TYPE
394 )) {
395 check("encl.pos <= start || end <= encl.pos",
396 encl, self, encl.pos <= self.start || self.end <= encl.pos);
397 }
398 check("pos <= end", encl, self, self.pos <= self.end);
399 if (!( (self.tag == TYPEARRAY || isAnnotatedArray(self.tree)) &&
400 (encl.tag == TYPEARRAY || isAnnotatedArray(encl.tree))
401 ||
402 encl.tag == MODIFIERS && self.tag == ANNOTATION
403 ) ) {
404 check("end <= encl.end", encl, self, self.end <= encl.end);
405 }
406 }
407 }
408
409 Info prevEncl = encl;
410 encl = self;
411 tree.accept(this);
412 encl = prevEncl;
413 }
414
415 private boolean isAnnotatedArray(JCTree tree) {
416 return tree.hasTag(ANNOTATED_TYPE) &&
417 ((JCAnnotatedType)tree).underlyingType.hasTag(TYPEARRAY);
418 }
419
420 @Override
421 public void visitVarDef(JCVariableDecl tree) {
422 // enum member declarations are desugared in the parser and have
423 // ill-defined semantics for tree positions, so for now, we
424 // skip the synthesized bits and just check parts which came from
425 // the original source text
426 if ((tree.mods.flags & Flags.ENUM) != 0) {
427 scan(tree.mods);
428 if (tree.init != null) {
429 if (tree.init.hasTag(NEWCLASS)) {
430 JCNewClass init = (JCNewClass) tree.init;
431 if (init.args != null && init.args.nonEmpty()) {
432 scan(init.args);
433 }
434 if (init.def != null && init.def.defs != null) {
435 scan(init.def.defs);
436 }
437 }
438 }
439 } else
440 super.visitVarDef(tree);
441 }
442
443 boolean check(Info encl, Info self) {
444 if (excludeTags.size() > 0) {
445 if (encl != null && excludeTags.contains(getTagName(encl.tag))
446 || excludeTags.contains(getTagName(self.tag)))
447 return false;
448 }
449 return tags.size() == 0 || tags.contains(getTagName(self.tag));
450 }
451
452 void check(String label, Info encl, Info self, boolean ok) {
453 if (!ok) {
454 if (gui) {
455 if (viewer == null)
456 viewer = new Viewer();
457 viewer.addEntry(sourcefile, label, encl, self);
458 }
459
460 String s = "encl: " + encl.tree.toString() +
461 " this: " + self.tree.toString();
462 String msg = sourcefile.getName() + ": " + label + ": " +
463 "encl:" + encl + " this:" + self + "\n" +
464 s.substring(0, Math.min(80, s.length())).replaceAll("[\r\n]+", " ");
465 error(msg);
466 }
467 }
468
469 JavaFileObject sourcefile;
470 EndPosTable endPosTable;
471 Info encl;
472
473 }
474
475 /**
476 * Utility class providing easy access to position and other info for a tree node.
477 */
478 private class Info {
479 Info() {
480 tree = null;
481 tag = ERRONEOUS;
482 start = 0;
483 pos = 0;
484 end = Integer.MAX_VALUE;
485 }
486
487 Info(JCTree tree, EndPosTable endPosTable) {
488 this.tree = tree;
489 tag = tree.getTag();
490 start = TreeInfo.getStartPos(tree);
491 pos = tree.pos;
492 end = TreeInfo.getEndPos(tree, endPosTable);
493 }
494
495 @Override
496 public String toString() {
497 return getTagName(tree.getTag()) + "[start:" + start + ",pos:" + pos + ",end:" + end + "]";
498 }
499
500 final JCTree tree;
501 final JCTree.Tag tag;
502 final int start;
503 final int pos;
504 final int end;
505 }
506
507 /**
508 * Thrown when errors are found parsing a java file.
509 */
510 private static class ParseException extends Exception {
511 ParseException(String msg) {
512 super(msg);
513 }
514 }
515
516 /**
517 * DiagnosticListener to report diagnostics and count any errors that occur.
518 */
519 private static class Reporter implements DiagnosticListener<JavaFileObject> {
520 Reporter(PrintWriter out) {
521 this.out = out;
522 }
523
524 public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
525 out.println(diagnostic);
526 switch (diagnostic.getKind()) {
527 case ERROR:
528 errors++;
529 }
530 }
531 int errors;
532 PrintWriter out;
533 }
534
535 /**
536 * GUI viewer for issues found by TreePosTester. The viewer provides a drop
537 * down list for selecting error conditions, a header area providing details
538 * about an error, and a text area with the ranges of text highlighted as
539 * appropriate.
540 */
541 private class Viewer extends JFrame {
542 /**
543 * Create a viewer.
544 */
545 Viewer() {
546 initGUI();
547 }
548
549 /**
550 * Add another entry to the list of errors.
551 * @param file The file containing the error
552 * @param check The condition that was being tested, and which failed
553 * @param encl the enclosing tree node
554 * @param self the tree node containing the error
555 */
556 void addEntry(JavaFileObject file, String check, Info encl, Info self) {
557 Entry e = new Entry(file, check, encl, self);
558 DefaultComboBoxModel m = (DefaultComboBoxModel) entries.getModel();
559 m.addElement(e);
560 if (m.getSize() == 1)
561 entries.setSelectedItem(e);
562 }
563
564 /**
565 * Initialize the GUI window.
566 */
567 private void initGUI() {
568 JPanel head = new JPanel(new GridBagLayout());
569 GridBagConstraints lc = new GridBagConstraints();
570 GridBagConstraints fc = new GridBagConstraints();
571 fc.anchor = GridBagConstraints.WEST;
572 fc.fill = GridBagConstraints.HORIZONTAL;
573 fc.gridwidth = GridBagConstraints.REMAINDER;
574
575 entries = new JComboBox();
576 entries.addActionListener(new ActionListener() {
577 public void actionPerformed(ActionEvent e) {
578 showEntry((Entry) entries.getSelectedItem());
579 }
580 });
581 fc.insets.bottom = 10;
582 head.add(entries, fc);
583 fc.insets.bottom = 0;
584 head.add(new JLabel("check:"), lc);
585 head.add(checkField = createTextField(80), fc);
586 fc.fill = GridBagConstraints.NONE;
587 head.add(setBackground(new JLabel("encl:"), enclColor), lc);
588 head.add(enclPanel = new InfoPanel(), fc);
589 head.add(setBackground(new JLabel("self:"), selfColor), lc);
590 head.add(selfPanel = new InfoPanel(), fc);
591 add(head, BorderLayout.NORTH);
592
593 body = new JTextArea();
594 body.setFont(Font.decode(Font.MONOSPACED));
595 body.addCaretListener(new CaretListener() {
596 public void caretUpdate(CaretEvent e) {
597 int dot = e.getDot();
598 int mark = e.getMark();
599 if (dot == mark)
600 statusText.setText("dot: " + dot);
601 else
602 statusText.setText("dot: " + dot + ", mark:" + mark);
603 }
604 });
605 JScrollPane p = new JScrollPane(body,
606 JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
607 JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
608 p.setPreferredSize(new Dimension(640, 480));
609 add(p, BorderLayout.CENTER);
610
611 statusText = createTextField(80);
612 add(statusText, BorderLayout.SOUTH);
613
614 pack();
615 setLocationRelativeTo(null); // centered on screen
616 setVisible(true);
617 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
618 }
619
620 /** Show an entry that has been selected. */
621 private void showEntry(Entry e) {
622 try {
623 // update simple fields
624 setTitle(e.file.getName());
625 checkField.setText(e.check);
626 enclPanel.setInfo(e.encl);
627 selfPanel.setInfo(e.self);
628 // show file text with highlights
629 body.setText(e.file.getCharContent(true).toString());
630 Highlighter highlighter = body.getHighlighter();
631 highlighter.removeAllHighlights();
632 addHighlight(highlighter, e.encl, enclColor);
633 addHighlight(highlighter, e.self, selfColor);
634 scroll(body, getMinPos(enclPanel.info, selfPanel.info));
635 } catch (IOException ex) {
636 body.setText("Cannot read " + e.file.getName() + ": " + e);
637 }
638 }
639
640 /** Create a test field. */
641 private JTextField createTextField(int width) {
642 JTextField f = new JTextField(width);
643 f.setEditable(false);
644 f.setBorder(null);
645 return f;
646 }
647
648 /** Add a highlighted region based on the positions in an Info object. */
649 private void addHighlight(Highlighter h, Info info, Color c) {
650 int start = info.start;
651 int end = info.end;
652 if (start == -1 && end == -1)
653 return;
654 if (start == -1)
655 start = end;
656 if (end == -1)
657 end = start;
658 try {
659 h.addHighlight(info.start, info.end,
660 new DefaultHighlighter.DefaultHighlightPainter(c));
661 if (info.pos != -1) {
662 Color c2 = new Color(c.getRed(), c.getGreen(), c.getBlue(), (int)(.4f * 255)); // 40%
663 h.addHighlight(info.pos, info.pos + 1,
664 new DefaultHighlighter.DefaultHighlightPainter(c2));
665 }
666 } catch (BadLocationException e) {
667 e.printStackTrace();
668 }
669 }
670
671 /** Get the minimum valid position in a set of info objects. */
672 private int getMinPos(Info... values) {
673 int i = Integer.MAX_VALUE;
674 for (Info info: values) {
675 if (info.start >= 0) i = Math.min(i, info.start);
676 if (info.pos >= 0) i = Math.min(i, info.pos);
677 if (info.end >= 0) i = Math.min(i, info.end);
678 }
679 return (i == Integer.MAX_VALUE) ? 0 : i;
680 }
681
682 /** Set the background on a component. */
683 private JComponent setBackground(JComponent comp, Color c) {
684 comp.setOpaque(true);
685 comp.setBackground(c);
686 return comp;
687 }
688
689 /** Scroll a text area to display a given position near the middle of the visible area. */
690 private void scroll(final JTextArea t, final int pos) {
691 // Using invokeLater appears to give text a chance to sort itself out
692 // before the scroll happens; otherwise scrollRectToVisible doesn't work.
693 // Maybe there's a better way to sync with the text...
694 EventQueue.invokeLater(new Runnable() {
695 public void run() {
696 try {
697 Rectangle r = t.modelToView(pos);
698 JScrollPane p = (JScrollPane) SwingUtilities.getAncestorOfClass(JScrollPane.class, t);
699 r.y = Math.max(0, r.y - p.getHeight() * 2 / 5);
700 r.height += p.getHeight() * 4 / 5;
701 t.scrollRectToVisible(r);
702 } catch (BadLocationException ignore) {
703 }
704 }
705 });
706 }
707
708 private JComboBox entries;
709 private JTextField checkField;
710 private InfoPanel enclPanel;
711 private InfoPanel selfPanel;
712 private JTextArea body;
713 private JTextField statusText;
714
715 private Color selfColor = new Color(0.f, 1.f, 0.f, 0.2f); // 20% green
716 private Color enclColor = new Color(1.f, 0.f, 0.f, 0.2f); // 20% red
717
718 /** Panel to display an Info object. */
719 private class InfoPanel extends JPanel {
720 InfoPanel() {
721 add(tagName = createTextField(20));
722 add(new JLabel("start:"));
723 add(addListener(start = createTextField(6)));
724 add(new JLabel("pos:"));
725 add(addListener(pos = createTextField(6)));
726 add(new JLabel("end:"));
727 add(addListener(end = createTextField(6)));
728 }
729
730 void setInfo(Info info) {
731 this.info = info;
732 tagName.setText(getTagName(info.tag));
733 start.setText(String.valueOf(info.start));
734 pos.setText(String.valueOf(info.pos));
735 end.setText(String.valueOf(info.end));
736 }
737
738 JTextField addListener(final JTextField f) {
739 f.addMouseListener(new MouseAdapter() {
740 @Override
741 public void mouseClicked(MouseEvent e) {
742 body.setCaretPosition(Integer.valueOf(f.getText()));
743 body.getCaret().setVisible(true);
744 }
745 });
746 return f;
747 }
748
749 Info info;
750 JTextField tagName;
751 JTextField start;
752 JTextField pos;
753 JTextField end;
754 }
755
756 /** Object to record information about an error to be displayed. */
757 private class Entry {
758 Entry(JavaFileObject file, String check, Info encl, Info self) {
759 this.file = file;
760 this.check = check;
761 this.encl = encl;
762 this.self= self;
763 }
764
765 @Override
766 public String toString() {
767 return file.getName() + " " + check + " " + getMinPos(encl, self);
768 }
769
770 final JavaFileObject file;
771 final String check;
772 final Info encl;
773 final Info self;
774 }
775 }
776 }
777