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processing/app/src/processing/app/Console.java at master · dimr/processing · GitHub
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processing
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app
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Console.java
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/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Part of the Processing project - http://processing.org
Copyright (c) 2012-16 The Processing Foundation
Copyright (c) 2004-12 Ben Fry and Casey Reas
Copyright (c) 2001-04 Massachusetts Institute of Technology
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package
processing
.
app
;
import
java
.
io
.*;
import
java
.
text
.
SimpleDateFormat
;
import
java
.
util
.
Date
;
/**
* Message console that sits below the editing area.
* <p />
* Be careful when debugging this class, because if it's throwing exceptions,
* don't take over System.err, and debug while watching just System.out
* or just call println() or whatever directly to systemOut or systemErr.
* <p />
* Also note that encodings will not work properly when run from Eclipse. This
* means that if you use non-ASCII characters in a println() or some such,
* the characters won't print properly in the Processing and/or Eclipse console.
* It seems that Eclipse's console-grabbing and that of Processing don't
* get along with one another. Use 'ant run' to work on encoding-related issues.
*/
public
class
Console
{
// PrintStream sketchOut;
// PrintStream sketchErr;
// Single static instance shared because there's only one real System.out.
// Within the input handlers, the currentConsole variable will be used to
// echo things to the correct location.
/** The original System.out */
static
PrintStream
systemOut
;
/** The original System.err */
static
PrintStream
systemErr
;
/** Our replacement System.out */
static
PrintStream
consoleOut
;
/** Our replacement System.err */
static
PrintStream
consoleErr
;
/** All stdout also written to a file */
static
OutputStream
stdoutFile
;
/** All stderr also written to a file */
static
OutputStream
stderrFile
;
/** stdout listener for the currently active Editor */
static
OutputStream
editorOut
;
/** stderr listener for the currently active Editor */
static
OutputStream
editorErr
;
static
public
void
startup
() {
systemOut
=
System
.
out
;
systemErr
=
System
.
err
;
// placing everything inside a try block because this can be a dangerous
// time for the lights to blink out and crash for and obscure reason.
try
{
SimpleDateFormat
formatter
=
new
SimpleDateFormat
(
"yyMMdd_HHmmss"
);
// Moving away from a random string in 0256 (and adding hms) because
// the random digits looked like times anyway, causing confusion.
//String randy = String.format("%04d", (int) (1000 * Math.random()));
//final String stamp = formatter.format(new Date()) + "_" + randy;
final
String
stamp
=
formatter
.
format
(
new
Date
());
File
consoleDir
=
Base
.
getSettingsFile
(
"console"
);
if
(
consoleDir
.
exists
()) {
// clear old debug files
File
[]
stdFiles
=
consoleDir
.
listFiles
(
new
FileFilter
() {
final
String
todayPrefix
=
stamp
.
substring
(
0
,
4
);
public
boolean
accept
(
File
file
) {
if
(!
file
.
isDirectory
()) {
String
name
=
file
.
getName
();
if
(
name
.
endsWith
(
".err"
) ||
name
.
endsWith
(
".out"
)) {
// don't delete any of today's debug messages
return
!
name
.
startsWith
(
todayPrefix
);
}
}
return
false
;
}
});
// Remove any files that aren't from today
for
(
File
file
:
stdFiles
) {
file
.
delete
();
}
}
else
{
consoleDir
.
mkdirs
();
}
File
outFile
=
new
File
(
consoleDir
,
stamp
+
".out"
);
stdoutFile
=
new
FileOutputStream
(
outFile
);
File
errFile
=
new
File
(
consoleDir
,
stamp
+
".err"
);
stderrFile
=
new
FileOutputStream
(
errFile
);
// consoleOut = new PrintStream(new EditorConsoleStream(false, null));
// consoleErr = new PrintStream(new EditorConsoleStream(true, null));
consoleOut
=
new
PrintStream
(
new
ConsoleStream
(
false
));
consoleErr
=
new
PrintStream
(
new
ConsoleStream
(
true
));
System
.
setOut
(
consoleOut
);
System
.
setErr
(
consoleErr
);
}
catch
(
Exception
e
) {
stdoutFile
=
null
;
stderrFile
=
null
;
consoleOut
=
null
;
consoleErr
=
null
;
System
.
setOut
(
systemOut
);
System
.
setErr
(
systemErr
);
e
.
printStackTrace
();
}
}
static
public
void
setEditor
(
OutputStream
out
,
OutputStream
err
) {
editorOut
=
out
;
editorErr
=
err
;
}
// public Console() {
// sketchOut = new PrintStream(new EditorConsoleStream(false, this));
// sketchErr = new PrintStream(new EditorConsoleStream(true, this));
// }
// public PrintStream getOut() {
// return sketchOut;
// }
// public PrintStream getErr() {
// return sketchErr;
// }
/**
* Close the streams so that the temporary files can be deleted.
* <p/>
* File.deleteOnExit() cannot be used because the stdout and stderr
* files are inside a folder, and have to be deleted before the
* folder itself is deleted, which can't be guaranteed when using
* the deleteOnExit() method.
*/
static
public
void
shutdown
() {
// replace original streams to remove references to console's streams
System
.
setOut
(
systemOut
);
System
.
setErr
(
systemErr
);
cleanup
(
consoleOut
);
cleanup
(
consoleErr
);
// also have to close the original FileOutputStream
// otherwise it won't be shut down completely
cleanup
(
stdoutFile
);
cleanup
(
stderrFile
);
}
static
private
void
cleanup
(
OutputStream
output
) {
try
{
if
(
output
!=
null
) {
output
.
flush
();
output
.
close
();
}
}
catch
(
IOException
e
) {
e
.
printStackTrace
();
}
}
// . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
static
class
ConsoleStream
extends
OutputStream
{
boolean
err
;
// whether stderr or stdout
byte
single
[] =
new
byte
[
1
];
public
ConsoleStream
(
boolean
err
) {
this
.
err
=
err
;
}
public
void
close
() { }
public
void
flush
() { }
public
void
write
(
byte
b
[]) {
// appears never to be used
write
(
b
,
0
,
b
.
length
);
}
public
void
write
(
byte
b
[],
int
offset
,
int
length
) {
// First write to the original stdout/stderr
if
(
err
) {
systemErr
.
write
(
b
,
offset
,
length
);
}
else
{
systemOut
.
write
(
b
,
offset
,
length
);
}
// Write to the files that are storing this information
writeFile
(
b
,
offset
,
length
);
// Write to the console of the current Editor, if any
try
{
if
(
err
) {
if
(
editorErr
!=
null
) {
editorErr
.
write
(
b
,
offset
,
length
);
}
}
else
{
if
(
editorOut
!=
null
) {
editorOut
.
write
(
b
,
offset
,
length
);
}
}
}
catch
(
IOException
e
) {
// Avoid this function being called in a recursive, infinite loop
e
.
printStackTrace
(
systemErr
);
}
}
public
void
writeFile
(
byte
b
[],
int
offset
,
int
length
) {
final
OutputStream
echo
=
err
?
stderrFile
:
stdoutFile
;
if
(
echo
!=
null
) {
try
{
echo
.
write
(
b
,
offset
,
length
);
echo
.
flush
();
}
catch
(
IOException
e
) {
e
.
printStackTrace
();
}
}
}
public
void
write
(
int
b
) {
single
[
0
] = (
byte
)
b
;
write
(
single
,
0
,
1
);
}
}
}
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