com.intellij.psi.PsiManager#findFile ( )源码实例Demo

public static void addLibraryChildren(final OrderEntry entry, final List<AbstractTreeNode> children, Project project, ProjectViewNode node) {
  final PsiManager psiManager = PsiManager.getInstance(project);
  VirtualFile[] files =
    entry instanceof LibraryOrderEntry ? getLibraryRoots((LibraryOrderEntry)entry) : entry.getFiles(BinariesOrderRootType.getInstance());
  for (final VirtualFile file : files) {
    if (!file.isValid()) continue;
    if (file.isDirectory()) {
      final PsiDirectory psiDir = psiManager.findDirectory(file);
      if (psiDir == null) {
        continue;
      }
      children.add(new PsiDirectoryNode(project, psiDir, node.getSettings()));
    }
    else {
      final PsiFile psiFile = psiManager.findFile(file);
      if (psiFile == null) continue;
      children.add(new PsiFileNode(project, psiFile, node.getSettings()));
    }
  }
}
 

@Nullable
private static OCFile correlateTestToHeader(OCFile file) {
  // Quickly check foo_test.cc -> foo.h as well. "getAssociatedFileWithSameName" only does
  // foo.cc <-> foo.h. However, if you do goto-related-symbol again, it will go from
  // foo.h -> foo.cc instead of back to foo_test.cc.
  PsiManager psiManager = PsiManager.getInstance(file.getProject());
  String pathWithoutExtension = FileUtil.getNameWithoutExtension(file.getVirtualFile().getPath());
  for (String testSuffix : PartnerFilePatterns.DEFAULT_PARTNER_SUFFIXES) {
    if (pathWithoutExtension.endsWith(testSuffix)) {
      String possibleHeaderName = StringUtil.trimEnd(pathWithoutExtension, testSuffix) + ".h";
      VirtualFile virtualFile = VfsUtil.findFileByIoFile(new File(possibleHeaderName), false);
      if (virtualFile != null) {
        PsiFile psiFile = psiManager.findFile(virtualFile);
        if (psiFile instanceof OCFile) {
          return (OCFile) psiFile;
        }
      }
    }
  }
  return null;
}
 

@NotNull
public static Collection<PsiFile> convertVirtualFilesToPsiFiles(@NotNull Project project, @NotNull Collection<VirtualFile> files) {
    Collection<PsiFile> psiFiles = new HashSet<>();

    PsiManager psiManager = null;
    for (VirtualFile file : files) {
        if(psiManager == null) {
            psiManager = PsiManager.getInstance(project);
        }

        PsiFile psiFile = psiManager.findFile(file);
        if(psiFile != null) {
            psiFiles.add(psiFile);
        }
    }

    return psiFiles;
}
 

public static List<PsiElement> resolveTargetByName(@Nls String name, @NotNull Project project, GlobalSearchScope scope) {
  final PsiManager psiManager = PsiManager.getInstance(project);
  final ArrayList<PsiElement> result = new ArrayList<>();
  final Collection<VirtualFile> containingFiles = FileBasedIndex.getInstance().getContainingFiles(NAME, name, scope);
  for (VirtualFile virtualFile : containingFiles) {
    final PsiFile psiFile = psiManager.findFile(virtualFile);
    if (psiFile instanceof PyFile) {
      final PyReferenceExpression referenceExpression = PantsPsiUtil.findTargetDefinitions((PyFile)psiFile).get(name);
      final PsiPolyVariantReference reference = referenceExpression != null ? referenceExpression.getReference() : null;
      final PsiElement definition = reference != null ? reference.resolve() : null;
      if (definition != null) {
        result.add(definition);
      } else if (referenceExpression != null) {
        // at least something
        result.add(referenceExpression);
      }
    }
  }
  return result;
}
 

@Nullable
@Override
public PsiElement resolve() {
  Optional<VirtualFile> virtualFile = findFile();
  if (!virtualFile.isPresent()) {
    return null;
  }
  VirtualFile buildFileOrDirectory = PantsUtil.findBUILDFiles(virtualFile.get())
    .stream()
    .findFirst()
    .orElse(virtualFile.get());

  final PsiManager psiManager = PsiManager.getInstance(getElement().getProject());
  final PsiFile buildFile = psiManager.findFile(buildFileOrDirectory);
  return buildFile != null ? buildFile : psiManager.findDirectory(buildFileOrDirectory);
}
 

public static void setupRenderer(SimpleColoredComponent renderer, Project project, Bookmark bookmark, boolean selected) {
  VirtualFile file = bookmark.getFile();
  if (!file.isValid()) {
    return;
  }

  PsiManager psiManager = PsiManager.getInstance(project);

  PsiElement fileOrDir = file.isDirectory() ? psiManager.findDirectory(file) : psiManager.findFile(file);
  if (fileOrDir != null) {
    renderer.setIcon(IconDescriptorUpdaters.getIcon(fileOrDir, 0));
  }

  String description = bookmark.getDescription();
  if (description != null) {
    renderer.append(description + " ", SimpleTextAttributes.REGULAR_BOLD_ATTRIBUTES);
  }

  FileStatus fileStatus = FileStatusManager.getInstance(project).getStatus(file);
  TextAttributes attributes = new TextAttributes(fileStatus.getColor(), null, null, EffectType.LINE_UNDERSCORE, Font.PLAIN);
  renderer.append(file.getName(), SimpleTextAttributes.fromTextAttributes(attributes));
  if (bookmark.getLine() >= 0) {
    renderer.append(":", SimpleTextAttributes.GRAYED_ATTRIBUTES);
    renderer.append(String.valueOf(bookmark.getLine() + 1), SimpleTextAttributes.GRAYED_ATTRIBUTES);
  }

  if (!selected) {
    FileColorManager colorManager = FileColorManager.getInstance(project);
    if (fileOrDir instanceof PsiFile) {
      Color color = colorManager.getRendererBackground((PsiFile)fileOrDir);
      if (color != null) {
        renderer.setBackground(color);
      }
    }
  }
}
 

/**
 * 读取文件内容（文本文件）
 *
 * @param project 项目对象
 * @param file    文件对象
 * @return 文件内容
 */
public String read(Project project, File file) {
    PsiManager psiManager = PsiManager.getInstance(project);
    VirtualFile virtualFile = LocalFileSystem.getInstance().findFileByIoFile(file);
    if (virtualFile == null) {
        return null;
    }
    PsiFile psiFile = psiManager.findFile(virtualFile);
    if (psiFile == null) {
        return null;
    }
    return psiFile.getText();
}
 

@Nullable
private PsiElement findPsiElementForVirtualFile(Project project, VirtualFile file) {
  PsiManager psiManager = PsiManager.getInstance(project);
  if (file.isDirectory()) {
    return psiManager.findDirectory(file);
  } else {
    return psiManager.findFile(file);
  }
}
 

private ProtoPsiFileRoot getTarget(@NotNull String filename, @NotNull Module module) {
    Collection<PsiFileSystemItem> roots = new FilePathReferenceProvider().getRoots(module, getRoot());
    for (PsiFileSystemItem root : roots) {
        VirtualFile file = root.getVirtualFile().findFileByRelativePath(filename);
        if (file != null) {
            PsiManager psiManager = PsiManager.getInstance(getProject());
            PsiFile psiFile = psiManager.findFile(file);
            if (psiFile instanceof ProtoPsiFileRoot) {
                return (ProtoPsiFileRoot) psiFile;
            }
        }
    }
    return null;
}
 

public void fillFiles(Set<PsiFile> set, boolean recursively) {
  final PsiManager psiManager = PsiManager.getInstance(myProject);
  for (VirtualFile vFile : getRegisteredFiles()) {
    final PsiFile psiFile = psiManager.findFile(vFile);
    if (psiFile != null && psiFile.isValid()) {
      set.add(psiFile);
    }
  }
}
 

@Nullable
static BlazePackage getBuildFile(Project project, @Nullable VirtualFile vf) {
  if (vf == null) {
    return null;
  }
  PsiManager manager = PsiManager.getInstance(project);
  PsiFileSystemItem psiFile = vf.isDirectory() ? manager.findDirectory(vf) : manager.findFile(vf);
  if (psiFile == null) {
    return null;
  }
  return BlazePackage.getContainingPackage(psiFile);
}
 

@Override
public void performPaste(@Nonnull DataContext dataContext) {
  final Project project = dataContext.getData(CommonDataKeys.PROJECT);
  final IdeView ideView = dataContext.getData(LangDataKeys.IDE_VIEW);
  if (project == null || ideView == null) return;

  if (!FileCopyPasteUtil.isFileListFlavorAvailable()) return;

  final Transferable contents = CopyPasteManager.getInstance().getContents();
  if (contents == null) return;
  final List<File> fileList = FileCopyPasteUtil.getFileList(contents);
  if (fileList == null) return;

  final List<PsiElement> elements = new ArrayList<PsiElement>();
  for (File file : fileList) {
    final VirtualFile vFile = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(file);
    if (vFile != null) {
      final PsiManager instance = PsiManager.getInstance(project);
      PsiFileSystemItem item = vFile.isDirectory() ? instance.findDirectory(vFile) : instance.findFile(vFile);
      if (item != null) {
        elements.add(item);
      }
    }
  }

  if (elements.size() > 0) {
    final PsiDirectory dir = ideView.getOrChooseDirectory();
    if (dir != null) {
      final boolean move = LinuxDragAndDropSupport.isMoveOperation(contents);
      if (move) {
        new MoveFilesOrDirectoriesHandler().doMove(PsiUtilCore.toPsiElementArray(elements), dir);
      }
      else {
        new CopyFilesOrDirectoriesHandler().doCopy(PsiUtilCore.toPsiElementArray(elements), dir);
      }
    }
  }
}
 

@Nullable
public PsiFileSystemItem resolveFile(File file) {
  VirtualFile vf =
      VirtualFileSystemProvider.getInstance().getSystem().findFileByPath(file.getPath());
  if (vf == null) {
    return null;
  }
  PsiManager manager = PsiManager.getInstance(project);
  return vf.isDirectory() ? manager.findDirectory(vf) : manager.findFile(vf);
}
 

@Nullable
private static PsiFileSystemItem resolveFile(Project project, @Nullable File file) {
  if (file == null) {
    return null;
  }
  PsiManager manager = PsiManager.getInstance(project);
  VirtualFile vf =
      VirtualFileSystemProvider.getInstance().getSystem().findFileByPath(file.getPath());
  if (vf == null) {
    return null;
  }
  return vf.isDirectory() ? manager.findDirectory(vf) : manager.findFile(vf);
}
 

@Override
public void actionPerformed(AnActionEvent e) {
  Project project = getEventProject(e);
  VirtualFile file = e.getDataContext().getData(CommonDataKeys.VIRTUAL_FILE);
  if (project != null && file != null && file.is(VFileProperty.SYMLINK)) {
    VirtualFile target = file.getCanonicalFile();
    if (target != null) {
      PsiManager psiManager = PsiManager.getInstance(project);
      PsiFileSystemItem psiFile = target.isDirectory() ? psiManager.findDirectory(target) : psiManager.findFile(target);
      if (psiFile != null) {
        ProjectView.getInstance(project).select(psiFile, target, false);
      }
    }
  }
}
 

private PsiElement findPsi(@Nonnull VirtualFile vFile) {
  if (!vFile.isValid()) {
    return null;
  }
  PsiManager psiManager = PsiManager.getInstance(myProject);
  return vFile.isDirectory() ? psiManager.findDirectory(vFile) : psiManager.findFile(vFile);
}
 

@Nullable
@Override
public PsiElement getDocumentationElementForLookupItem(PsiManager psiManager, Object object, PsiElement element) {
	if (object instanceof StringTableKey) {
		return ((StringTableKey) object).getIDXmlTag();
	}
	if (SQFParserDefinition.isCommand(element.getNode().getElementType())) {
		return element;
	}
	if (element instanceof PsiFile) {
		return element;
	}
	if (object instanceof HeaderConfigFunction) {
		HeaderConfigFunction function = (HeaderConfigFunction) object;
		if (!function.getFunctionFileExtension().equals(".sqf")) {
			return null;
		}
		List<VirtualFile> rootConfigVirtFiles = ArmaPluginUtil.getConfigVirtualFiles(element);
		if (rootConfigVirtFiles.isEmpty()) {
			return null;
		}
		VirtualFile functionVirtFile = HeaderConfigFunctionUtil.locateConfigFunctionVirtualFile(rootConfigVirtFiles, function);
		if (functionVirtFile == null) {
			return null;
		}
		return psiManager.findFile(functionVirtFile);
	}
	return null;
}
 

@Override
@Nonnull
@RequiredReadAction
public Collection<AbstractTreeNode> getChildren() {
  Module module = getValue();
  if (module == null || module.isDisposed()) {
    return Collections.emptyList();
  }
  ModuleRootManager rootManager = ModuleRootManager.getInstance(module);
  ModuleFileIndex moduleFileIndex = rootManager.getFileIndex();

  final VirtualFile[] contentRoots = rootManager.getContentRoots();
  final List<AbstractTreeNode> children = new ArrayList<>(contentRoots.length + 1);
  final PsiManager psiManager = PsiManager.getInstance(module.getProject());
  for (final VirtualFile contentRoot : contentRoots) {
    if (!moduleFileIndex.isInContent(contentRoot)) continue;

    if (contentRoot.isDirectory()) {
      PsiDirectory directory = psiManager.findDirectory(contentRoot);
      if(directory != null) {
        children.add(new PsiDirectoryNode(getProject(), directory, getSettings()));
      }
    }
    else {
      PsiFile file = psiManager.findFile(contentRoot);
      if(file != null) {
        children.add(new PsiFileNode(getProject(), file, getSettings()));
      }
    }
  }
  return children;
}
 

private void processFile(Project project, VirtualFile file) {
  if (StdFileTypes.JAVA.equals(file.getFileType())) {
    final PsiManager psiManager = PsiManager.getInstance(project);
    PsiJavaFile psiFile = (PsiJavaFile) psiManager.findFile(file);
    if (psiFile != null) {
      process(project, psiFile);
    }
  }
}
 

public static PsiFileSystemItem getPsiFileSystemItem(PsiManager psiManager, VirtualFile file) {
  return file.isDirectory() ? psiManager.findDirectory(file) : psiManager.findFile(file);
}