/*
* 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.openapi.diff.impl.processing;
import com.intellij.openapi.diff.LineTokenizer;
import com.intellij.openapi.diff.ex.DiffFragment;
import com.intellij.openapi.diff.impl.ComparisonPolicy;
import com.intellij.util.diff.FilesTooBigForDiffException;
public interface DiffPolicy {
DiffFragment[] buildFragments(String text1, String text2) throws FilesTooBigForDiffException;
DiffPolicy LINES_WO_FORMATTING = new LineBlocks(ComparisonPolicy.IGNORE_SPACE);
DiffPolicy DEFAULT_LINES = new LineBlocks(ComparisonPolicy.DEFAULT);
class LineBlocks implements DiffPolicy {
private final ComparisonPolicy myComparisonPolicy;
public LineBlocks(ComparisonPolicy comparisonPolicy) {
myComparisonPolicy = comparisonPolicy;
}
public DiffFragment[] buildFragments(String text1, String text2) throws FilesTooBigForDiffException {
String[] strings1 = new LineTokenizer(text1).execute();
String[] strings2 = new LineTokenizer(text2).execute();
return myComparisonPolicy.buildDiffFragmentsFromLines(strings1, strings2);
}
}
class ByChar implements DiffPolicy {
private final ComparisonPolicy myComparisonPolicy;
public ByChar(ComparisonPolicy comparisonPolicy) {
myComparisonPolicy = comparisonPolicy;
}
public DiffFragment[] buildFragments(String text1, String text2) throws FilesTooBigForDiffException {
return myComparisonPolicy.buildFragments(splitByChar(text1), splitByChar(text2));
}
private String[] splitByChar(String text) {
String[] result = new String[text.length()];
for (int i = 0; i < result.length; i++) {
result[i] = text.substring(i, i + 1);
}
return result;
}
}
}