platform/platform-impl/src/com/intellij/openapi/fileEditor/impl/EditorWithProviderComposite.java

/*
 * 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.fileEditor.impl;

import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.fileEditor.FileEditor;
import com.intellij.openapi.fileEditor.FileEditorProvider;
import com.intellij.openapi.fileEditor.FileEditorState;
import com.intellij.openapi.fileEditor.FileEditorStateLevel;
import com.intellij.openapi.fileEditor.ex.FileEditorManagerEx;
import com.intellij.openapi.util.Pair;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.util.ArrayUtil;
import org.jetbrains.annotations.NotNull;

/**
 * Author: msk
 */
public class EditorWithProviderComposite extends EditorComposite {
  private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.fileEditor.impl.EditorWithProviderComposite");
  private final FileEditorProvider[] myProviders;

  EditorWithProviderComposite(@NotNull VirtualFile file,
                              @NotNull FileEditor[] editors,
                              @NotNull FileEditorProvider[] providers,
                              @NotNull FileEditorManagerEx fileEditorManager) {
    super(file, editors, fileEditorManager);
    myProviders = providers;
  }

  @NotNull
  public FileEditorProvider[] getProviders() {
    return myProviders;
  }

  @Override
  public boolean isModified() {
    final FileEditor[] editors = getEditors();
    for (FileEditor editor : editors) {
      if (editor.isModified()) {
        return true;
      }
    }
    return false;
  }

  @Override
  @NotNull
  public Pair<FileEditor, FileEditorProvider> getSelectedEditorWithProvider() {
    LOG.assertTrue(myEditors.length > 0, myEditors.length);
    if (myEditors.length == 1) {
      LOG.assertTrue(myTabbedPaneWrapper == null);
      return Pair.create(myEditors[0], myProviders[0]);
    }
    else { // we have to get myEditor from tabbed pane
      LOG.assertTrue(myTabbedPaneWrapper != null);
      int index = myTabbedPaneWrapper.getSelectedIndex();
      if (index == -1) {
        index = 0;
      }
      LOG.assertTrue(index >= 0, index);
      LOG.assertTrue(index < myEditors.length, index);
      return Pair.create(myEditors[index], myProviders[index]);
    }
  }

  @NotNull
  public HistoryEntry currentStateAsHistoryEntry() {
    final FileEditor[] editors = getEditors();
    final FileEditorState[] states = new FileEditorState[editors.length];
    for (int j = 0; j < states.length; j++) {
      states[j] = editors[j].getState(FileEditorStateLevel.FULL);
      LOG.assertTrue(states[j] != null);
    }
    final int selectedProviderIndex = ArrayUtil.find(editors, getSelectedEditor());
    LOG.assertTrue(selectedProviderIndex != -1);
    final FileEditorProvider[] providers = getProviders();
    return new HistoryEntry(getFile(), providers, states, providers[selectedProviderIndex]);
  }
}