plugins/maven/src/main/java/org/jetbrains/idea/maven/utils/actions/MavenActionUtil.java

/*
 * Copyright 2000-2010 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 org.jetbrains.idea.maven.utils.actions;

import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.actionSystem.DataKeys;
import com.intellij.openapi.actionSystem.PlatformDataKeys;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.ProjectFileIndex;
import com.intellij.openapi.roots.ProjectRootManager;
import com.intellij.openapi.vfs.VirtualFile;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.idea.maven.model.MavenConstants;
import org.jetbrains.idea.maven.project.MavenProject;
import org.jetbrains.idea.maven.project.MavenProjectsManager;
import org.jetbrains.idea.maven.utils.MavenUtil;

import java.util.*;

public class MavenActionUtil {
  private MavenActionUtil() {
  }

  public static boolean hasProject(DataContext context) {
    return CommonDataKeys.PROJECT.getData(context) != null;
  }

  @NotNull
  public static Project getProject(DataContext context) {
    return CommonDataKeys.PROJECT.getData(context);
  }

  public static boolean isMavenizedProject(DataContext context) {
    Project project = CommonDataKeys.PROJECT.getData(context);
    return project != null && MavenProjectsManager.getInstance(project).isMavenizedProject();
  }

  @Nullable
  public static MavenProject getMavenProject(DataContext context) {
    MavenProject result;
    final MavenProjectsManager manager = getProjectsManager(context);

    final VirtualFile file = CommonDataKeys.VIRTUAL_FILE.getData(context);
    if (file != null) {
      result = manager.findProject(file);
      if (result != null) return result;
    }

    Module module = getModule(context);
    if (module != null) {
      result = manager.findProject(module);
      if (result != null) return result;
    }

    return null;
  }

  @Nullable
  private static Module getModule(DataContext context) {
    final Module module = DataKeys.MODULE.getData(context);
    return module != null ? module : DataKeys.MODULE_CONTEXT.getData(context);
  }

  @NotNull
  public static MavenProjectsManager getProjectsManager(DataContext context) {
    return MavenProjectsManager.getInstance(getProject(context));
  }

  public static boolean isMavenProjectFile(VirtualFile file) {
    return file != null && !file.isDirectory()
           && MavenConstants.POM_XML.equals(file.getName())
           && file.isInLocalFileSystem();
  }

  public static List<MavenProject> getMavenProjects(DataContext context) {
    Project project = CommonDataKeys.PROJECT.getData(context);
    if (project == null) return Collections.emptyList();

    VirtualFile[] virtualFiles = CommonDataKeys.VIRTUAL_FILE_ARRAY.getData(context);
    if (virtualFiles == null || virtualFiles.length == 0) return Collections.emptyList();

    MavenProjectsManager projectsManager = MavenProjectsManager.getInstance(project);
    if (!projectsManager.isMavenizedProject()) return Collections.emptyList();

    Set<MavenProject> res = new LinkedHashSet<MavenProject>();

    ProjectFileIndex fileIndex = ProjectRootManager.getInstance(project).getFileIndex();

    for (VirtualFile file : virtualFiles) {
      MavenProject mavenProject;

      if (file.isDirectory()) {
        VirtualFile contentRoot = fileIndex.getContentRootForFile(file);
        if (!file.equals(contentRoot)) return Collections.emptyList();

        Module module = fileIndex.getModuleForFile(file);
        if (module == null || !projectsManager.isMavenizedModule(module)) return Collections.emptyList();

        mavenProject = projectsManager.findProject(module);
      }
      else {
        mavenProject = projectsManager.findProject(file);
      }

      if (mavenProject == null) return Collections.emptyList();

      res.add(mavenProject);
    }

    return new ArrayList<MavenProject>(res);
  }

  public static List<VirtualFile> getMavenProjectsFiles(DataContext context) {
    return MavenUtil.collectFiles(getMavenProjects(context));
  }
}