jdk8-mips64-public/langtools: test/tools/javac/tree/TreePosTest.java@7375d4979bd3

     1 /*

     2  * Copyright (c) 2010, 2011, 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  */

    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;

    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.parser.EndPosTable;

    77 import com.sun.tools.javac.tree.JCTree;

    78 import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;

    79 import com.sun.tools.javac.tree.JCTree.JCNewClass;

    80 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;

    81 import com.sun.tools.javac.tree.TreeInfo;

    82 import com.sun.tools.javac.tree.TreeScanner;

    84 import static com.sun.tools.javac.tree.JCTree.Tag.*;

    85 import static com.sun.tools.javac.util.Position.NOPOS;

    87 /**

    88  * Utility and test program to check validity of tree positions for tree nodes.

    89  * The program can be run standalone, or as a jtreg test.  In standalone mode,

    90  * errors can be displayed in a gui viewer. For info on command line args,

    91  * run program with no args.

    92  *

    93  * <p>

    94  * jtreg: Note that by using the -r switch in the test description below, this test

    95  * will process all java files in the langtools/test directory, thus implicitly

    96  * covering any new language features that may be tested in this test suite.

    97  */

    99 /*

   100  * @test

   101  * @bug 6919889

   102  * @summary assorted position errors in compiler syntax trees

   103  * @run main TreePosTest -q -r -ef ./tools/javac/typeAnnotations -ef ./tools/javap/typeAnnotations -et ANNOTATED_TYPE .

   104  */

   105 public class TreePosTest {

   106     /**

   107      * Main entry point.

   108      * If test.src is set, program runs in jtreg mode, and will throw an Error

   109      * if any errors arise, otherwise System.exit will be used, unless the gui

   110      * viewer is being used. In jtreg mode, the default base directory for file

   111      * args is the value of ${test.src}. In jtreg mode, the -r option can be

   112      * given to change the default base directory to the root test directory.

   113      */

   114     public static void main(String... args) {

   115         String testSrc = System.getProperty("test.src");

   116         File baseDir = (testSrc == null) ? null : new File(testSrc);

   117         boolean ok = new TreePosTest().run(baseDir, args);

   118         if (!ok) {

   119             if (testSrc != null)  // jtreg mode

   120                 throw new Error("failed");

   121             else

   122                 System.exit(1);

   123         }

   124     }

   126     /**

   127      * Run the program. A base directory can be provided for file arguments.

   128      * In jtreg mode, the -r option can be given to change the default base

   129      * directory to the test root directory. For other options, see usage().

   130      * @param baseDir base directory for any file arguments.

   131      * @param args command line args

   132      * @return true if successful or in gui mode

   133      */

   134     boolean run(File baseDir, String... args) {

   135         if (args.length == 0) {

   136             usage(System.out);

   137             return true;

   138         }

   140         List<File> files = new ArrayList<File>();

   141         for (int i = 0; i < args.length; i++) {

   142             String arg = args[i];

   143             if (arg.equals("-encoding") && i + 1 < args.length)

   144                 encoding = args[++i];

   145             else if (arg.equals("-gui"))

   146                 gui = true;

   147             else if (arg.equals("-q"))

   148                 quiet = true;

   149             else if (arg.equals("-v"))

   150                 verbose = true;

   151             else if (arg.equals("-t") && i + 1 < args.length)

   152                 tags.add(args[++i]);

   153             else if (arg.equals("-ef") && i + 1 < args.length)

   154                 excludeFiles.add(new File(baseDir, args[++i]));

   155             else if (arg.equals("-et") && i + 1 < args.length)

   156                 excludeTags.add(args[++i]);

   157             else if (arg.equals("-r")) {

   158                 if (excludeFiles.size() > 0)

   159                     throw new Error("-r must be used before -ef");

   160                 File d = baseDir;

   161                 while (!new File(d, "TEST.ROOT").exists()) {

   162                     d = d.getParentFile();

   163                     if (d == null)

   164                         throw new Error("cannot find TEST.ROOT");

   165                 }

   166                 baseDir = d;

   167             }

   168             else if (arg.startsWith("-"))

   169                 throw new Error("unknown option: " + arg);

   170             else {

   171                 while (i < args.length)

   172                     files.add(new File(baseDir, args[i++]));

   173             }

   174         }

   176         for (File file: files) {

   177             if (file.exists())

   178                 test(file);

   179             else

   180                 error("File not found: " + file);

   181         }

   183         if (fileCount != 1)

   184             System.err.println(fileCount + " files read");

   185         if (errors > 0)

   186             System.err.println(errors + " errors");

   188         return (gui || errors == 0);

   189     }

   191     /**

   192      * Print command line help.

   193      * @param out output stream

   194      */

   195     void usage(PrintStream out) {

   196         out.println("Usage:");

   197         out.println("  java TreePosTest options... files...");

   198         out.println("");

   199         out.println("where options include:");

   200         out.println("-gui      Display returns in a GUI viewer");

   201         out.println("-q        Quiet: don't report on inapplicable files");

   202         out.println("-v        Verbose: report on files as they are being read");

   203         out.println("-t tag    Limit checks to tree nodes with this tag");

   204         out.println("          Can be repeated if desired");

   205         out.println("-ef file  Exclude file or directory");

   206         out.println("-et tag   Exclude tree nodes with given tag name");

   207         out.println("");

   208         out.println("files may be directories or files");

   209         out.println("directories will be scanned recursively");

   210         out.println("non java files, or java files which cannot be parsed, will be ignored");

   211         out.println("");

   212     }

   214     /**

   215      * Test a file. If the file is a directory, it will be recursively scanned

   216      * for java files.

   217      * @param file the file or directory to test

   218      */

   219     void test(File file) {

   220         if (excludeFiles.contains(file)) {

   221             if (!quiet)

   222                 error("File " + file + " excluded");

   223             return;

   224         }

   226         if (file.isDirectory()) {

   227             for (File f: file.listFiles()) {

   228                 test(f);

   229             }

   230             return;

   231         }

   233         if (file.isFile() && file.getName().endsWith(".java")) {

   234             try {

   235                 if (verbose)

   236                     System.err.println(file);

   237                 fileCount++;

   238                 PosTester p = new PosTester();

   239                 p.test(read(file));

   240             } catch (ParseException e) {

   241                 if (!quiet) {

   242                     error("Error parsing " + file + "\n" + e.getMessage());

   243                 }

   244             } catch (IOException e) {

   245                 error("Error reading " + file + ": " + e);

   246             }

   247             return;

   248         }

   250         if (!quiet)

   251             error("File " + file + " ignored");

   252     }

   254     // See CR:  6982992 Tests CheckAttributedTree.java, JavacTreeScannerTest.java, and SourceTreeeScannerTest.java timeout

   255     StringWriter sw = new StringWriter();

   256     PrintWriter pw = new PrintWriter(sw);

   257     Reporter r = new Reporter(pw);

   258     JavacTool tool = JavacTool.create();

   259     StandardJavaFileManager fm = tool.getStandardFileManager(r, null, null);

   261     /**

   262      * Read a file.

   263      * @param file the file to be read

   264      * @return the tree for the content of the file

   265      * @throws IOException if any IO errors occur

   266      * @throws TreePosTest.ParseException if any errors occur while parsing the file

   267      */

   268     JCCompilationUnit read(File file) throws IOException, ParseException {

   269         JavacTool tool = JavacTool.create();

   270         r.errors = 0;

   271         Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(file);

   272         JavacTask task = tool.getTask(pw, fm, r, Collections.<String>emptyList(), null, files);

   273         Iterable<? extends CompilationUnitTree> trees = task.parse();

   274         pw.flush();

   275         if (r.errors > 0)

   276             throw new ParseException(sw.toString());

   277         Iterator<? extends CompilationUnitTree> iter = trees.iterator();

   278         if (!iter.hasNext())

   279             throw new Error("no trees found");

   280         JCCompilationUnit t = (JCCompilationUnit) iter.next();

   281         if (iter.hasNext())

   282             throw new Error("too many trees found");

   283         return t;

   284     }

   286     /**

   287      * Report an error. When the program is complete, the program will either

   288      * exit or throw an Error if any errors have been reported.

   289      * @param msg the error message

   290      */

   291     void error(String msg) {

   292         System.err.println(msg);

   293         errors++;

   294     }

   296     /**

   297      * Names for tree tags.

   298      */

   299     private static String getTagName(JCTree.Tag tag) {

   300         String name = tag.name();

   301         return (name == null) ? "??" : name;

   302     }

   304     /** Number of files that have been analyzed. */

   305     int fileCount;

   306     /** Number of errors reported. */

   307     int errors;

   308     /** Flag: don't report irrelevant files. */

   309     boolean quiet;

   310     /** Flag: report files as they are processed. */

   311     boolean verbose;

   312     /** Flag: show errors in GUI viewer. */

   313     boolean gui;

   314     /** Option: encoding for test files. */

   315     String encoding;

   316     /** The GUI viewer for errors. */

   317     Viewer viewer;

   318     /** The set of tags for tree nodes to be analyzed; if empty, all tree nodes

   319      * are analyzed. */

   320     Set<String> tags = new HashSet<String>();

   321     /** Set of files and directories to be excluded from analysis. */

   322     Set<File> excludeFiles = new HashSet<File>();

   323     /** Set of tag names to be excluded from analysis. */

   324     Set<String> excludeTags = new HashSet<String>();

   326     /**

   327      * Main class for testing assertions concerning tree positions for tree nodes.

   328      */

   329     private class PosTester extends TreeScanner {

   330         void test(JCCompilationUnit tree) {

   331             sourcefile = tree.sourcefile;

   332             endPosTable = tree.endPositions;

   333             encl = new Info();

   334             tree.accept(this);

   335         }

   337         @Override

   338         public void scan(JCTree tree) {

   339             if (tree == null)

   340                 return;

   342             Info self = new Info(tree, endPosTable);

   343             if (check(encl, self)) {

   344                 // Modifiers nodes are present throughout the tree even where

   345                 // there is no corresponding source text.

   346                 // Redundant semicolons in a class definition can cause empty

   347                 // initializer blocks with no positions.

   348                 if ((self.tag == MODIFIERS || self.tag == BLOCK)

   349                         && self.pos == NOPOS) {

   350                     // If pos is NOPOS, so should be the start and end positions

   351                     check("start == NOPOS", encl, self, self.start == NOPOS);

   352                     check("end == NOPOS", encl, self, self.end == NOPOS);

   353                 } else {

   354                     // For this node, start , pos, and endpos should be all defined

   355                     check("start != NOPOS", encl, self, self.start != NOPOS);

   356                     check("pos != NOPOS", encl, self, self.pos != NOPOS);

   357                     check("end != NOPOS", encl, self, self.end != NOPOS);

   358                     // The following should normally be ordered

   359                     // encl.start <= start <= pos <= end <= encl.end

   360                     // In addition, the position of the enclosing node should be

   361                     // within this node.

   362                     // The primary exceptions are for array type nodes, because of the

   363                     // need to support legacy syntax:

   364                     //    e.g.    int a[];    int[] b[];    int f()[] { return null; }

   365                     // and because of inconsistent nesting of left and right of

   366                     // array declarations:

   367                     //    e.g.    int[][] a = new int[2][];

   368                     check("encl.start <= start", encl, self, encl.start <= self.start);

   369                     check("start <= pos", encl, self, self.start <= self.pos);

   370                     if (!(self.tag == TYPEARRAY

   371                             && (encl.tag == VARDEF ||

   372                                 encl.tag == METHODDEF ||

   373                                 encl.tag == TYPEARRAY))) {

   374                         check("encl.pos <= start || end <= encl.pos",

   375                                 encl, self, encl.pos <= self.start || self.end <= encl.pos);

   376                     }

   377                     check("pos <= end", encl, self, self.pos <= self.end);

   378                     if (!(self.tag == TYPEARRAY && encl.tag == TYPEARRAY)) {

   379                         check("end <= encl.end", encl, self, self.end <= encl.end);

   380                     }

   381                 }

   382             }

   384             Info prevEncl = encl;

   385             encl = self;

   386             tree.accept(this);

   387             encl = prevEncl;

   388         }

   390         @Override

   391         public void visitVarDef(JCVariableDecl tree) {

   392             // enum member declarations are desugared in the parser and have

   393             // ill-defined semantics for tree positions, so for now, we

   394             // skip the synthesized bits and just check parts which came from

   395             // the original source text

   396             if ((tree.mods.flags & Flags.ENUM) != 0) {

   397                 scan(tree.mods);

   398                 if (tree.init != null) {

   399                     if (tree.init.hasTag(NEWCLASS)) {

   400                         JCNewClass init = (JCNewClass) tree.init;

   401                         if (init.args != null && init.args.nonEmpty()) {

   402                             scan(init.args);

   403                         }

   404                         if (init.def != null && init.def.defs != null) {

   405                             scan(init.def.defs);

   406                         }

   407                     }

   408                 }

   409             } else

   410                 super.visitVarDef(tree);

   411         }

   413         boolean check(Info encl, Info self) {

   414             if (excludeTags.size() > 0) {

   415                 if (encl != null && excludeTags.contains(getTagName(encl.tag))

   416                         || excludeTags.contains(getTagName(self.tag)))

   417                     return false;

   418             }

   419             return tags.size() == 0 || tags.contains(getTagName(self.tag));

   420         }

   422         void check(String label, Info encl, Info self, boolean ok) {

   423             if (!ok) {

   424                 if (gui) {

   425                     if (viewer == null)

   426                         viewer = new Viewer();

   427                     viewer.addEntry(sourcefile, label, encl, self);

   428                 }

   430                 String s = self.tree.toString();

   431                 String msg = sourcefile.getName() + ": " + label + ": " +

   432                         "encl:" + encl + " this:" + self + "\n" +

   433                         s.substring(0, Math.min(80, s.length())).replaceAll("[\r\n]+", " ");

   434                 error(msg);

   435             }

   436         }

   438         JavaFileObject sourcefile;

   439         EndPosTable endPosTable;

   440         Info encl;

   442     }

   444     /**

   445      * Utility class providing easy access to position and other info for a tree node.

   446      */

   447     private class Info {

   448         Info() {

   449             tree = null;

   450             tag = ERRONEOUS;

   451             start = 0;

   452             pos = 0;

   453             end = Integer.MAX_VALUE;

   454         }

   456         Info(JCTree tree, EndPosTable endPosTable) {

   457             this.tree = tree;

   458             tag = tree.getTag();

   459             start = TreeInfo.getStartPos(tree);

   460             pos = tree.pos;

   461             end = TreeInfo.getEndPos(tree, endPosTable);

   462         }

   464         @Override

   465         public String toString() {

   466             return getTagName(tree.getTag()) + "[start:" + start + ",pos:" + pos + ",end:" + end + "]";

   467         }

   469         final JCTree tree;

   470         final JCTree.Tag tag;

   471         final int start;

   472         final int pos;

   473         final int end;

   474     }

   476     /**

   477      * Thrown when errors are found parsing a java file.

   478      */

   479     private static class ParseException extends Exception {

   480         ParseException(String msg) {

   481             super(msg);

   482         }

   483     }

   485     /**

   486      * DiagnosticListener to report diagnostics and count any errors that occur.

   487      */

   488     private static class Reporter implements DiagnosticListener<JavaFileObject> {

   489         Reporter(PrintWriter out) {

   490             this.out = out;

   491         }

   493         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {

   494             out.println(diagnostic);

   495             switch (diagnostic.getKind()) {

   496                 case ERROR:

   497                     errors++;

   498             }

   499         }

   500         int errors;

   501         PrintWriter out;

   502     }

   504     /**

   505      * GUI viewer for issues found by TreePosTester. The viewer provides a drop

   506      * down list for selecting error conditions, a header area providing details

   507      * about an error, and a text area with the ranges of text highlighted as

   508      * appropriate.

   509      */

   510     private class Viewer extends JFrame {

   511         /**

   512          * Create a viewer.

   513          */

   514         Viewer() {

   515             initGUI();

   516         }

   518         /**

   519          * Add another entry to the list of errors.

   520          * @param file The file containing the error

   521          * @param check The condition that was being tested, and which failed

   522          * @param encl the enclosing tree node

   523          * @param self the tree node containing the error

   524          */

   525         void addEntry(JavaFileObject file, String check, Info encl, Info self) {

   526             Entry e = new Entry(file, check, encl, self);

   527             DefaultComboBoxModel m = (DefaultComboBoxModel) entries.getModel();

   528             m.addElement(e);

   529             if (m.getSize() == 1)

   530                 entries.setSelectedItem(e);

   531         }

   533         /**

   534          * Initialize the GUI window.

   535          */

   536         private void initGUI() {

   537             JPanel head = new JPanel(new GridBagLayout());

   538             GridBagConstraints lc = new GridBagConstraints();

   539             GridBagConstraints fc = new GridBagConstraints();

   540             fc.anchor = GridBagConstraints.WEST;

   541             fc.fill = GridBagConstraints.HORIZONTAL;

   542             fc.gridwidth = GridBagConstraints.REMAINDER;

   544             entries = new JComboBox();

   545             entries.addActionListener(new ActionListener() {

   546                 public void actionPerformed(ActionEvent e) {

   547                     showEntry((Entry) entries.getSelectedItem());

   548                 }

   549             });

   550             fc.insets.bottom = 10;

   551             head.add(entries, fc);

   552             fc.insets.bottom = 0;

   553             head.add(new JLabel("check:"), lc);

   554             head.add(checkField = createTextField(80), fc);

   555             fc.fill = GridBagConstraints.NONE;

   556             head.add(setBackground(new JLabel("encl:"), enclColor), lc);

   557             head.add(enclPanel = new InfoPanel(), fc);

   558             head.add(setBackground(new JLabel("self:"), selfColor), lc);

   559             head.add(selfPanel = new InfoPanel(), fc);

   560             add(head, BorderLayout.NORTH);

   562             body = new JTextArea();

   563             body.setFont(Font.decode(Font.MONOSPACED));

   564             body.addCaretListener(new CaretListener() {

   565                 public void caretUpdate(CaretEvent e) {

   566                     int dot = e.getDot();

   567                     int mark = e.getMark();

   568                     if (dot == mark)

   569                         statusText.setText("dot: " + dot);

   570                     else

   571                         statusText.setText("dot: " + dot + ", mark:" + mark);

   572                 }

   573             });

   574             JScrollPane p = new JScrollPane(body,

   575                     JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,

   576                     JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

   577             p.setPreferredSize(new Dimension(640, 480));

   578             add(p, BorderLayout.CENTER);

   580             statusText = createTextField(80);

   581             add(statusText, BorderLayout.SOUTH);

   583             pack();

   584             setLocationRelativeTo(null); // centered on screen

   585             setVisible(true);

   586             setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

   587         }

   589         /** Show an entry that has been selected. */

   590         private void showEntry(Entry e) {

   591             try {

   592                 // update simple fields

   593                 setTitle(e.file.getName());

   594                 checkField.setText(e.check);

   595                 enclPanel.setInfo(e.encl);

   596                 selfPanel.setInfo(e.self);

   597                 // show file text with highlights

   598                 body.setText(e.file.getCharContent(true).toString());

   599                 Highlighter highlighter = body.getHighlighter();

   600                 highlighter.removeAllHighlights();

   601                 addHighlight(highlighter, e.encl, enclColor);

   602                 addHighlight(highlighter, e.self, selfColor);

   603                 scroll(body, getMinPos(enclPanel.info, selfPanel.info));

   604             } catch (IOException ex) {

   605                 body.setText("Cannot read " + e.file.getName() + ": " + e);

   606             }

   607         }

   609         /** Create a test field. */

   610         private JTextField createTextField(int width) {

   611             JTextField f = new JTextField(width);

   612             f.setEditable(false);

   613             f.setBorder(null);

   614             return f;

   615         }

   617         /** Add a highlighted region based on the positions in an Info object. */

   618         private void addHighlight(Highlighter h, Info info, Color c) {

   619             int start = info.start;

   620             int end = info.end;

   621             if (start == -1 && end == -1)

   622                 return;

   623             if (start == -1)

   624                 start = end;

   625             if (end == -1)

   626                 end = start;

   627             try {

   628                 h.addHighlight(info.start, info.end,

   629                         new DefaultHighlighter.DefaultHighlightPainter(c));

   630                 if (info.pos != -1) {

   631                     Color c2 = new Color(c.getRed(), c.getGreen(), c.getBlue(), (int)(.4f * 255)); // 40%

   632                     h.addHighlight(info.pos, info.pos + 1,

   633                         new DefaultHighlighter.DefaultHighlightPainter(c2));

   634                 }

   635             } catch (BadLocationException e) {

   636                 e.printStackTrace();

   637             }

   638         }

   640         /** Get the minimum valid position in a set of info objects. */

   641         private int getMinPos(Info... values) {

   642             int i = Integer.MAX_VALUE;

   643             for (Info info: values) {

   644                 if (info.start >= 0) i = Math.min(i, info.start);

   645                 if (info.pos   >= 0) i = Math.min(i, info.pos);

   646                 if (info.end   >= 0) i = Math.min(i, info.end);

   647             }

   648             return (i == Integer.MAX_VALUE) ? 0 : i;

   649         }

   651         /** Set the background on a component. */

   652         private JComponent setBackground(JComponent comp, Color c) {

   653             comp.setOpaque(true);

   654             comp.setBackground(c);

   655             return comp;

   656         }

   658         /** Scroll a text area to display a given position near the middle of the visible area. */

   659         private void scroll(final JTextArea t, final int pos) {

   660             // Using invokeLater appears to give text a chance to sort itself out

   661             // before the scroll happens; otherwise scrollRectToVisible doesn't work.

   662             // Maybe there's a better way to sync with the text...

   663             EventQueue.invokeLater(new Runnable() {

   664                 public void run() {

   665                     try {

   666                         Rectangle r = t.modelToView(pos);

   667                         JScrollPane p = (JScrollPane) SwingUtilities.getAncestorOfClass(JScrollPane.class, t);

   668                         r.y = Math.max(0, r.y - p.getHeight() * 2 / 5);

   669                         r.height += p.getHeight() * 4 / 5;

   670                         t.scrollRectToVisible(r);

   671                     } catch (BadLocationException ignore) {

   672                     }

   673                 }

   674             });

   675         }

   677         private JComboBox entries;

   678         private JTextField checkField;

   679         private InfoPanel enclPanel;

   680         private InfoPanel selfPanel;

   681         private JTextArea body;

   682         private JTextField statusText;

   684         private Color selfColor = new Color(0.f, 1.f, 0.f, 0.2f); // 20% green

   685         private Color enclColor = new Color(1.f, 0.f, 0.f, 0.2f); // 20% red

   687         /** Panel to display an Info object. */

   688         private class InfoPanel extends JPanel {

   689             InfoPanel() {

   690                 add(tagName = createTextField(20));

   691                 add(new JLabel("start:"));

   692                 add(addListener(start = createTextField(6)));

   693                 add(new JLabel("pos:"));

   694                 add(addListener(pos = createTextField(6)));

   695                 add(new JLabel("end:"));

   696                 add(addListener(end = createTextField(6)));

   697             }

   699             void setInfo(Info info) {

   700                 this.info = info;

   701                 tagName.setText(getTagName(info.tag));

   702                 start.setText(String.valueOf(info.start));

   703                 pos.setText(String.valueOf(info.pos));

   704                 end.setText(String.valueOf(info.end));

   705             }

   707             JTextField addListener(final JTextField f) {

   708                 f.addMouseListener(new MouseAdapter() {

   709                     @Override

   710                     public void mouseClicked(MouseEvent e) {

   711                         body.setCaretPosition(Integer.valueOf(f.getText()));

   712                         body.getCaret().setVisible(true);

   713                     }

   714                 });

   715                 return f;

   716             }

   718             Info info;

   719             JTextField tagName;

   720             JTextField start;

   721             JTextField pos;

   722             JTextField end;

   723         }

   725         /** Object to record information about an error to be displayed. */

   726         private class Entry {

   727             Entry(JavaFileObject file, String check, Info encl, Info self) {

   728                 this.file = file;

   729                 this.check = check;

   730                 this.encl = encl;

   731                 this.self= self;

   732             }

   734             @Override

   735             public String toString() {

   736                 return file.getName() + " " + check + " " + getMinPos(encl, self);

   737             }

   739             final JavaFileObject file;

   740             final String check;

   741             final Info encl;

   742             final Info self;

   743         }

   744     }

   745 }

Mercurial > jdk8-mips64-public > langtools / file revision

test/tools/javac/tree/TreePosTest.java@7375d4979bd3

test/tools/javac/tree/TreePosTest.java