AbstractShowInFileView.java

package jetbrains.mps.vcs.actions;

/*Generated by MPS */

import com.intellij.openapi.vcs.actions.AbstractVcsAction;
import com.intellij.openapi.vcs.actions.VcsContext;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import jetbrains.mps.ide.projectPane.fileSystem.FileViewProjectPane;
import org.jetbrains.annotations.Nullable;
import com.intellij.openapi.vfs.VfsUtil;
import com.intellij.openapi.actionSystem.Presentation;
import java.util.List;
import org.jetbrains.annotations.NotNull;

/*package*/ abstract class AbstractShowInFileView extends AbstractVcsAction {
  /*package*/ AbstractShowInFileView() {
  }
  @Override
  protected void actionPerformed(VcsContext e) {
    final Project project = e.getProject();
    VirtualFile selectedFile = calculateSelectedFile(e);
    if (selectedFile != null) {
      assert project != null;
      FileViewProjectPane view = getView(project);
      view.selectNode(selectedFile, true);
    }
  }
  @Nullable
  private VirtualFile calculateSelectedFile(VcsContext e) {
    VirtualFile[] selectedFiles = e.getSelectedFiles();
    if (selectedFiles.length == 0) {
      return null;
    }
    if (selectedFiles.length == 1) {
      return selectedFiles[0];
    }
    return VfsUtil.getCommonAncestors(selectedFiles)[0];
  }
  protected abstract FileViewProjectPane getView(Project project);
  @Override
  protected void update(VcsContext vcsContext, Presentation presentation) {
    if (vcsContext.getProject() == null) {
      presentation.setEnabled(false);
      return;
    }
    List<VirtualFile> baseDirs = getRoots(vcsContext);
    VirtualFile selectedFile = calculateSelectedFile(vcsContext);
    if (selectedFile != null) {
      for (VirtualFile baseDir : baseDirs) {
        if (canScroll(baseDir, selectedFile)) {
          presentation.setEnabled(true);
          return;
        }
      }
    }
    presentation.setEnabled(false);
  }
  protected abstract List<VirtualFile> getRoots(VcsContext vcsContext);
  private boolean canScroll(VirtualFile baseDir, @NotNull VirtualFile selectedFile) {
    if (baseDir != null) {
      return VfsUtil.isAncestor(baseDir, selectedFile, false);
    }
    return false;
  }
}