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/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.diagnostic.logging;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.io.FileUtilRt;
import com.intellij.psi.search.GlobalSearchScope;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.*;
import java.nio.charset.Charset;
/**
* User: anna
* Date: Apr 19, 2005
*/
public abstract class LogConsoleImpl extends LogConsoleBase {
private final String myPath;
@NotNull
private final File myFile;
@NotNull
private final Charset myCharset;
private long myOldLength = 0;
/**
* @deprecated use {@link #LogConsoleImpl(com.intellij.openapi.project.Project, java.io.File, java.nio.charset.Charset, long, String, boolean, com.intellij.psi.search.GlobalSearchScope)}
*/
public LogConsoleImpl(Project project,
@NotNull File file,
@NotNull Charset charset,
long skippedContents,
@NotNull String title,
final boolean buildInActions) {
this(project, file, charset, skippedContents, title, buildInActions, GlobalSearchScope.allScope(project));
}
public LogConsoleImpl(Project project,
@NotNull File file,
@NotNull Charset charset,
long skippedContents,
@NotNull String title,
final boolean buildInActions,
final GlobalSearchScope searchScope) {
super(project, getReader(file, charset, skippedContents), title, buildInActions, new DefaultLogFilterModel(project),
searchScope);
myPath = file.getAbsolutePath();
myFile = file;
myCharset = charset;
}
@Nullable
private static Reader getReader(@NotNull File file, @NotNull Charset charset, long skippedContents) {
try {
try {
@SuppressWarnings("IOResourceOpenedButNotSafelyClosed")
FileInputStream inputStream = new FileInputStream(file);
//do not skip forward
if (file.length() >= skippedContents) {
long skipped = 0;
while (skipped < skippedContents) {
skipped += inputStream.skip(skippedContents - skipped);
}
}
return new BufferedReader(new InputStreamReader(inputStream, charset));
}
catch (FileNotFoundException ignored) {
if (FileUtilRt.createIfNotExists(file)) {
return new BufferedReader(new InputStreamReader(new FileInputStream(file), charset));
}
return null;
}
}
catch (Throwable ignored) {
return null;
}
}
@Override
@Nullable
public String getTooltip() {
return myPath;
}
public String getPath() {
return myPath;
}
@Nullable
@Override
protected BufferedReader updateReaderIfNeeded(@Nullable BufferedReader reader) throws IOException {
if (reader == null) {
return null;
}
long length = myFile.length();
if (length < myOldLength) {
reader.close();
//noinspection IOResourceOpenedButNotSafelyClosed
reader = new BufferedReader(new InputStreamReader(new FileInputStream(myFile), myCharset));
}
myOldLength = length;
return reader;
}
}
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