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/*
* Copyright 2000-2012 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.openapi.diff.impl.external;
import com.intellij.openapi.diff.DiffContent;
import com.intellij.openapi.diff.DiffRequest;
import com.intellij.openapi.diff.impl.DiffUtil;
import com.intellij.openapi.vfs.VirtualFile;
/**
* @author Konstantin Bulenkov
*/
class ExtCompareFiles extends BaseExternalTool {
public static final BaseExternalTool INSTANCE = new ExtCompareFiles();
private ExtCompareFiles() {
super(DiffManagerImpl.ENABLE_FILES, DiffManagerImpl.FILES_TOOL);
}
public boolean isAvailable(DiffRequest request) {
final DiffContent[] contents = request.getContents();
for (DiffContent content : contents) {
final VirtualFile file = getLocalFile(content.getFile());
if (file != null && file.isDirectory()) {
return false;
}
if (LocalFileExternalizer.canExternalizeAsFile(file)) {
continue;
}
if (DiffUtil.isWritable(content)) {
return false;
}
}
if (contents.length != 2) return false;
if (externalize(request, 0) == null) return false;
if (externalize(request, 1) == null) return false;
return true;
}
}
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