| /* |
| * 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.fragments; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.diff.impl.highlighting.FragmentSide; |
| import com.intellij.openapi.util.Condition; |
| import com.intellij.openapi.util.TextRange; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.Iterator; |
| |
| public class FragmentListImpl implements FragmentList { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.diff.impl.fragments.FragmentList"); |
| private final ArrayList<Fragment> myFragments; |
| |
| private <T extends Fragment> FragmentListImpl(ArrayList<T> sortedFragments) { |
| myFragments = (ArrayList<Fragment>)sortedFragments; |
| } |
| |
| private void init() { |
| Collections.sort(myFragments, FRAGMENT_COMPARATOR); |
| myFragments.trimToSize(); |
| } |
| |
| public static <T extends Fragment> FragmentList fromList(ArrayList<T> fragments) { |
| FragmentListImpl fragmentList = new FragmentListImpl(fragments); |
| fragmentList.init(); |
| return fragmentList; |
| } |
| |
| @Override |
| public FragmentList shift(TextRange rangeShift1, TextRange rangeShift2, |
| int startLine1, int startLine2) { |
| return new FragmentListImpl(shift(myFragments, rangeShift1, rangeShift2, startLine1, startLine2)); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return myFragments.isEmpty(); |
| } |
| |
| @Override |
| public Iterator<Fragment> iterator() { |
| return myFragments.iterator(); |
| } |
| |
| @Override |
| public Fragment getFragmentAt(int offset, FragmentSide side, Condition<Fragment> condition) { |
| for (Iterator<Fragment> iterator = iterator(); iterator.hasNext();) { |
| Fragment fragment = iterator.next(); |
| TextRange range = fragment.getRange(side); |
| if (range.getStartOffset() <= offset && |
| range.getEndOffset() > offset && |
| condition.value(fragment)) return fragment.getSubfragmentAt(offset, side, condition); |
| } |
| return null; |
| } |
| |
| public static ArrayList<Fragment> shift(ArrayList<Fragment> fragments, TextRange rangeShift1, TextRange rangeShift2, |
| int startLine1, int startLine2) { |
| ArrayList<Fragment> newFragments = new ArrayList<Fragment>(fragments.size()); |
| for (Iterator<Fragment> iterator = fragments.iterator(); iterator.hasNext();) { |
| Fragment fragment = iterator.next(); |
| newFragments.add(fragment.shift(rangeShift1, rangeShift2, startLine1, startLine2)); |
| } |
| return newFragments; |
| } |
| |
| private static final Comparator<Fragment> FRAGMENT_COMPARATOR = new Comparator<Fragment>() { |
| @Override |
| public int compare(Fragment fragment1, Fragment fragment2) { |
| int result = compareBySide(fragment1, fragment2, FragmentSide.SIDE1); |
| int check = compareBySide(fragment1, fragment2, FragmentSide.SIDE2); |
| LOG.assertTrue(result == 0 || check == 0 || sign(result) == sign(check)); |
| return result; |
| } |
| }; |
| |
| private static int sign(int n) { |
| if (n == 0) |
| return 0; |
| else |
| return n > 0 ? 1 : -1; |
| } |
| |
| private static int compareBySide(Fragment fragment1, Fragment fragment2, FragmentSide side) { |
| int start1 = fragment1.getRange(side).getStartOffset(); |
| int start2 = fragment2.getRange(side).getStartOffset(); |
| return start1 - start2; |
| } |
| } |