/*
* Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
package com.sun.tools.example.debug.gui;
import java.io.*;
import java.util.*;
import com.sun.jdi.*;
import com.sun.jdi.request.*;
import javax.swing.*;
/**
* Represents and manages one source file.
* Caches source lines. Holds other source file info.
*/
public class SourceModel extends AbstractListModel {
private File path;
boolean isActuallySource = true;
private List<ReferenceType> classes = new ArrayList<ReferenceType>();
private Environment env;
// Cached line-by-line access.
//### Unify this with source model used in source view?
//### What is our cache-management policy for these?
//### Even with weak refs, we won't discard any part of the
//### source if the SourceModel object is reachable.
/**
* List of Line.
*/
private List<Line> sourceLines = null;
public static class Line {
public String text;
public boolean hasBreakpoint = false;
public ReferenceType refType = null;
Line(String text) {
this.text = text;
}
public boolean isExecutable() {
return refType != null;
}
public boolean hasBreakpoint() {
return hasBreakpoint;
}
};
// 132 characters long, all printable characters.
public static final Line prototypeCellValue = new Line(
"abcdefghijklmnopqrstuvwxyz" +
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
"1234567890~!@#$%^&*()_+{}|" +
":<>?`-=[];',.XXXXXXXXXXXX/\\\"");
SourceModel(Environment env, File path) {
this.env = env;
this.path = path;
}
public SourceModel(String message) {
this.path = null;
setMessage(message);
}
private void setMessage(String message) {
isActuallySource = false;
sourceLines = new ArrayList<Line>();
sourceLines.add(new Line(message));
}
// **** Implement ListModel *****
@Override
public Object getElementAt(int index) {
if (sourceLines == null) {
initialize();
}
return sourceLines.get(index);
}
@Override
public int getSize() {
if (sourceLines == null) {
initialize();
}
return sourceLines.size();
}
// ***** Other functionality *****
public File fileName() {
return path;
}
public BufferedReader sourceReader() throws IOException {
return new BufferedReader(new FileReader(path));
}
public Line line(int lineNo) {
if (sourceLines == null) {
initialize();
}
int index = lineNo - 1; // list is 0-indexed
if (index >= sourceLines.size() || index < 0) {
return null;
} else {
return sourceLines.get(index);
}
}
public String sourceLine(int lineNo) {
Line line = line(lineNo);
if (line == null) {
return null;
} else {
return line.text;
}
}
void addClass(ReferenceType refType) {
// Logically is Set
if (classes.indexOf(refType) == -1) {
classes.add(refType);
if (sourceLines != null) {
markClassLines(refType);
}
}
}
/**
* @return List of currently known {@link com.sun.jdi.ReferenceType}
* in this source file.
*/
public List<ReferenceType> referenceTypes() {
return Collections.unmodifiableList(classes);
}
private void initialize() {
try {
rawInit();
} catch (IOException exc) {
setMessage("[Error reading source code]");
}
}
public void showBreakpoint(int ln, boolean hasBreakpoint) {
line(ln).hasBreakpoint = hasBreakpoint;
fireContentsChanged(this, ln, ln);
}
public void showExecutable(int ln, ReferenceType refType) {
line(ln).refType = refType;
fireContentsChanged(this, ln, ln);
}
/**
* Mark executable lines and breakpoints, but only
* when sourceLines is set.
*/
private void markClassLines(ReferenceType refType) {
for (Method meth : refType.methods()) {
try {
for (Location loc : meth.allLineLocations()) {
showExecutable(loc.lineNumber(), refType);
}
} catch (AbsentInformationException exc) {
// do nothing
}
}
for (BreakpointRequest bp :
env.getExecutionManager().eventRequestManager().breakpointRequests()) {
if (bp.location() != null) {
Location loc = bp.location();
if (loc.declaringType().equals(refType)) {
showBreakpoint(loc.lineNumber(),true);
}
}
}
}
private void rawInit() throws IOException {
sourceLines = new ArrayList<Line>();
BufferedReader reader = sourceReader();
try {
String line = reader.readLine();
while (line != null) {
sourceLines.add(new Line(expandTabs(line)));
line = reader.readLine();
}
} finally {
reader.close();
}
for (ReferenceType refType : classes) {
markClassLines(refType);
}
}
private String expandTabs(String s) {
int col = 0;
int len = s.length();
StringBuffer sb = new StringBuffer(132);
for (int i = 0; i < len; i++) {
char c = s.charAt(i);
sb.append(c);
if (c == '\t') {
int pad = (8 - (col % 8));
for (int j = 0; j < pad; j++) {
sb.append(' ');
}
col += pad;
} else {
col++;
}
}
return sb.toString();
}
}