platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/facade/CollapsedVisibleGraph.java

/*
 * Copyright 2000-2014 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.vcs.log.graph.impl.facade;

import com.intellij.openapi.util.Condition;
import com.intellij.vcs.log.graph.actions.GraphAnswer;
import com.intellij.vcs.log.graph.api.permanent.PermanentGraphInfo;
import com.intellij.vcs.log.graph.api.elements.GraphEdge;
import com.intellij.vcs.log.graph.api.elements.GraphElement;
import com.intellij.vcs.log.graph.api.printer.PrintElementsManager;
import com.intellij.vcs.log.graph.impl.print.AbstractPrintElementsManager;
import com.intellij.vcs.log.graph.impl.print.PrintElementsManagerImpl;
import com.intellij.vcs.log.graph.impl.visible.CollapsedGraphWithHiddenNodes;
import com.intellij.vcs.log.graph.impl.visible.FragmentGenerator;
import com.intellij.vcs.log.graph.impl.visible.adapters.GraphWithHiddenNodesAsGraphWithCommitInfo;
import com.intellij.vcs.log.graph.impl.visible.adapters.LinearGraphAsGraphWithHiddenNodes;
import com.intellij.vcs.log.graph.utils.IntToIntMap;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Set;

public class CollapsedVisibleGraph<CommitId> extends AbstractVisibleGraph<CommitId> {

  @NotNull
  public static <CommitId> CollapsedVisibleGraph<CommitId> newInstance(@NotNull final PermanentGraphInfo<CommitId> permanentGraph,
                                                                       @Nullable Set<CommitId> heads) {
    LinearGraphAsGraphWithHiddenNodes branchesGraph = createBranchesGraph(permanentGraph, heads);
    CollapsedGraphWithHiddenNodes collapsedGraph = new CollapsedGraphWithHiddenNodes(branchesGraph);
    final GraphWithHiddenNodesAsGraphWithCommitInfo<CommitId> graphWithCommitInfo =
      new GraphWithHiddenNodesAsGraphWithCommitInfo<CommitId>(collapsedGraph, permanentGraph.getPermanentGraphLayout(),
                                                              permanentGraph.getPermanentCommitsInfo());

    final Condition<Integer> notCollapsedNodes = permanentGraph.getNotCollapsedNodes();
    FragmentGenerator fragmentGeneratorForPrinterGraph = new FragmentGenerator(graphWithCommitInfo, new Condition<Integer>() {
      @Override
      public boolean value(Integer integer) {
        int longIndex = graphWithCommitInfo.getIntToIntMap().getLongIndex(integer);
        return notCollapsedNodes.value(longIndex);
      }
    });

    PrintElementsManagerImpl printElementsManager = new PrintElementsManagerImpl<CommitId>(graphWithCommitInfo,
                                                                                           fragmentGeneratorForPrinterGraph,
                                                                                           permanentGraph.getGraphColorManager());
    return new CollapsedVisibleGraph<CommitId>(graphWithCommitInfo, collapsedGraph, printElementsManager, fragmentGeneratorForPrinterGraph, permanentGraph);
  }

  @NotNull
  private final CollapsedGraphWithHiddenNodes myCollapsedGraph;

  @NotNull
  private final FragmentGenerator myFragmentGeneratorForPrinterGraph;

  @NotNull
  private final IntToIntMap myIntToIntMap;

  @NotNull
  private final PermanentGraphInfo<CommitId> myPermanentGraph;


  private CollapsedVisibleGraph(@NotNull GraphWithHiddenNodesAsGraphWithCommitInfo<CommitId> graphWithCommitInfo,
                                @NotNull CollapsedGraphWithHiddenNodes collapsedGraph,
                                @NotNull PrintElementsManager printElementsManager,
                                @NotNull FragmentGenerator fragmentGeneratorForPrinterGraph, @NotNull PermanentGraphInfo<CommitId> permanentGraph) {
    super(graphWithCommitInfo, permanentGraph.getCommitsWithNotLoadParent(), printElementsManager);
    myCollapsedGraph = collapsedGraph;
    myFragmentGeneratorForPrinterGraph = fragmentGeneratorForPrinterGraph;
    myPermanentGraph = permanentGraph;
    myIntToIntMap = graphWithCommitInfo.getIntToIntMap();
  }

  @Override
  protected void setLinearBranchesExpansion(boolean collapse) {
    if (!collapse) {
      myCollapsedGraph.expandAll();
    } else {
      FragmentGenerator fragmentGenerator = new FragmentGenerator(myCollapsedGraph, myPermanentGraph.getNotCollapsedNodes());
      for (int i = 0; i < myCollapsedGraph.nodesCount(); i++) {
        if (myCollapsedGraph.nodeIsVisible(i)) {
          FragmentGenerator.GraphFragment longDownFragment = fragmentGenerator.getLongDownFragment(i);
          if (longDownFragment != null) {
            myCollapsedGraph.fastCollapse(longDownFragment.upNodeIndex, longDownFragment.downNodeIndex);
          }
        }
      }
      myCollapsedGraph.callListeners();
    }
  }

  @NotNull
  protected GraphAnswer<CommitId> clickByElement(@NotNull GraphElement graphElement) {
    GraphEdge graphEdge = AbstractPrintElementsManager.containedCollapsedEdge(graphElement, myLinearGraphWithCommitInfo);
    if (graphEdge != null) {
      int upShortIndex = myIntToIntMap.getLongIndex(graphEdge.getUpNodeIndex());
      int downShortIndex = myIntToIntMap.getLongIndex(graphEdge.getDownNodeIndex());
      myCollapsedGraph.expand(upShortIndex, downShortIndex);
      return createJumpAnswer(graphEdge.getUpNodeIndex());
    }

    FragmentGenerator.GraphFragment relativeFragment = myFragmentGeneratorForPrinterGraph.getLongFragment(graphElement);
    if (relativeFragment != null) {
      int upShortIndex = myIntToIntMap.getLongIndex(relativeFragment.upNodeIndex);
      int downShortIndex = myIntToIntMap.getLongIndex(relativeFragment.downNodeIndex);
      myCollapsedGraph.collapse(upShortIndex, downShortIndex);
      return createJumpAnswer(relativeFragment.upNodeIndex);
    }

    return COMMIT_ID_GRAPH_ANSWER;
  }
}