/*
 * Copyright 2003-2011 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 jetbrains.mps.workbench.editors;

import com.intellij.openapi.fileEditor.*;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Disposer;
import com.intellij.openapi.vfs.VirtualFile;
import jetbrains.mps.ide.project.ProjectHelper;
import jetbrains.mps.workbench.languagesFs.MPSLanguageVirtualFile;
import org.jdom.Element;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;

public class MPSLanguageEditorProvider implements FileEditorProvider {
  @Override
  public boolean accept(@NotNull Project project, @NotNull VirtualFile file) {
    return file instanceof MPSLanguageVirtualFile;
  }

  @Override
  @NotNull
  public FileEditor createEditor(@NotNull Project project, @NotNull VirtualFile file) {
    return new MPSLanguageEditor(ProjectHelper.fromIdeaProject(project), (MPSLanguageVirtualFile) file);
  }

  @Override
  public void disposeEditor(@NotNull FileEditor editor) {
    Disposer.dispose(editor);
  }

  @Override
  @NotNull
  public FileEditorState readState(@NotNull Element sourceElement, @NotNull Project project, @NotNull VirtualFile file) {
    return new FileEditorState() {
      @Override
      public boolean canBeMergedWith(FileEditorState otherState, FileEditorStateLevel level) {
        return false;
      }
    };
  }

  @Override
  public void writeState(@NotNull FileEditorState state, @NotNull Project project, @NotNull Element targetElement) {

  }

  @Override
  @NotNull
  @NonNls
  public String getEditorTypeId() {
    return "MPSLanguageFileEditor";
  }

  @Override
  @NotNull
  public FileEditorPolicy getPolicy() {
    return FileEditorPolicy.HIDE_DEFAULT_EDITOR;
  }
}
