| /* |
| * Copyright 2000-2013 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.diagnostic.Logger; |
| import com.intellij.openapi.diff.impl.string.DiffString; |
| import com.intellij.openapi.diff.ex.DiffFragment; |
| import com.intellij.openapi.diff.impl.highlighting.FragmentSide; |
| import com.intellij.openapi.diff.impl.highlighting.Util; |
| import com.intellij.util.diff.FilesTooBigForDiffException; |
| import org.jetbrains.annotations.NotNull; |
| |
| class UniteSameType implements DiffCorrection { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.diff.impl.processing.UniteSameType"); |
| public static final DiffCorrection INSTANCE = new UniteSameType(); |
| @Override |
| public DiffFragment[] correct(DiffFragment[] fragments) { |
| return unitSameTypes(covertSequentialOneSideToChange(unitSameTypes(fragments))); |
| } |
| |
| @NotNull |
| private static DiffFragment[] unitSameTypes(@NotNull DiffFragment[] fragments) { |
| if (fragments.length < 2) return fragments; |
| DiffCorrection.FragmentsCollector collector = new DiffCorrection.FragmentsCollector(); |
| DiffFragment previous = fragments[0]; |
| for (int i = 1; i < fragments.length; i++) { |
| DiffFragment fragment = fragments[i]; |
| if (!fragment.isOneSide() && fragment.getText1().isEmpty() && fragment.getText2().isEmpty()) continue; |
| if (Util.isSameType(previous, fragment)) { |
| previous = Util.unite(previous, fragment); |
| } else { |
| collector.add(previous); |
| previous = fragment; |
| } |
| } |
| collector.add(previous); |
| return collector.toArray(); |
| } |
| |
| @NotNull |
| private static DiffFragment[] covertSequentialOneSideToChange(@NotNull DiffFragment[] fragments) { |
| if (fragments.length < 2) return fragments; |
| DiffCorrection.FragmentsCollector collector = new DiffCorrection.FragmentsCollector(); |
| // DiffFragment previous = fragments[0]; |
| DiffFragment previous = null; |
| for (int i = 0; i < fragments.length; i++) { |
| DiffFragment fragment = fragments[i]; |
| if (fragment.isOneSide()) { |
| if (previous == null) previous = fragment; |
| else { |
| FragmentSide side = FragmentSide.chooseSide(fragment); |
| DiffString previousText = side.getText(previous); |
| if (previousText == null) previousText = DiffString.EMPTY; |
| previous = side.createFragment(DiffString.concatenateNullable(previousText, side.getText(fragment)), |
| side.getOtherText(previous), true); |
| } |
| } else { |
| if (previous != null) collector.add(previous); |
| previous = null; |
| collector.add(fragment); |
| } |
| } |
| if (previous != null) collector.add(previous); |
| return collector.toArray(); |
| } |
| |
| public static DiffFragment uniteAll(DiffFragment[] fragments) throws FilesTooBigForDiffException { |
| fragments = INSTANCE.correct(fragments); |
| LOG.assertTrue(fragments.length == 1); |
| return fragments[0]; |
| } |
| } |