| /* |
| * 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.jetbrains.python.codeInsight.imports; |
| |
| 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.util.text.StringUtil; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.PsiFileSystemItem; |
| import com.intellij.psi.util.QualifiedName; |
| import com.jetbrains.python.psi.*; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * An immutable holder of information for one auto-import candidate. |
| * <p/> |
| * There can be do different flavors of such candidates: |
| * <ul> |
| * <li>Candidates based on existing imports in module. In this case {@link #getImportElement()} must return not {@code null}.</li> |
| * <li>Candidates not yet imported. In this case {@link #getPath()} must return not {@code null}.</li> |
| * </ul> |
| * <p/> |
| * |
| * @author dcheryasov |
| */ |
| // visibility is intentionally package-level |
| class ImportCandidateHolder implements Comparable<ImportCandidateHolder> { |
| private final PsiElement myImportable; |
| private final PyImportElement myImportElement; |
| private final PsiFileSystemItem myFile; |
| private final QualifiedName myPath; |
| |
| /** |
| * Creates new instance. |
| * |
| * @param importable an element that could be imported either from import element or from file. |
| * @param file the file which is the source of the importable (module for symbols, containing directory for modules and packages) |
| * @param importElement an existing import element that can be a source for the importable. |
| * @param path import path for the file, as a qualified name (a.b.c) |
| * For top-level imported symbols it's <em>qualified name of containing module</em> (or package for __init__.py). |
| * For modules and packages it should be <em>qualified name of their parental package</em> |
| * (empty for modules and packages located at source roots). |
| * |
| * @see com.jetbrains.python.codeInsight.imports.PythonReferenceImporter#proposeImportFix |
| */ |
| public ImportCandidateHolder(@NotNull PsiElement importable, @NotNull PsiFileSystemItem file, |
| @Nullable PyImportElement importElement, @Nullable QualifiedName path) { |
| myFile = file; |
| myImportable = importable; |
| myImportElement = importElement; |
| myPath = path; |
| assert importElement != null || path != null; // one of these must be present |
| } |
| |
| @NotNull |
| public PsiElement getImportable() { |
| return myImportable; |
| } |
| |
| @Nullable |
| public PyImportElement getImportElement() { |
| return myImportElement; |
| } |
| |
| @NotNull |
| public PsiFileSystemItem getFile() { |
| return myFile; |
| } |
| |
| @Nullable |
| public QualifiedName getPath() { |
| return myPath; |
| } |
| |
| /** |
| * Helper method that builds an import path, handling all these "import foo", "import foo as bar", "from bar import foo", etc. |
| * Either importPath or importSource must be not null. |
| * |
| * @param name what is ultimately imported. |
| * @param importPath known path to import the name. |
| * @param source known ImportElement to import the name; its 'as' clause is used if present. |
| * @return a properly qualified name. |
| */ |
| @NotNull |
| public static String getQualifiedName(@NotNull String name, @Nullable QualifiedName importPath, @Nullable PyImportElement source) { |
| final StringBuilder sb = new StringBuilder(); |
| if (source != null) { |
| final PsiElement parent = source.getParent(); |
| if (parent instanceof PyFromImportStatement) { |
| sb.append(name); |
| } |
| else { |
| sb.append(source.getVisibleName()).append(".").append(name); |
| } |
| } |
| else { |
| if (importPath != null && importPath.getComponentCount() > 0) { |
| sb.append(importPath).append("."); |
| } |
| sb.append(name); |
| } |
| return sb.toString(); |
| } |
| |
| @NotNull |
| public String getPresentableText(@NotNull String myName) { |
| final StringBuilder sb = new StringBuilder(getQualifiedName(myName, myPath, myImportElement)); |
| PsiElement parent = null; |
| if (myImportElement != null) { |
| parent = myImportElement.getParent(); |
| } |
| if (myImportable instanceof PyFunction) { |
| sb.append(((PyFunction)myImportable).getParameterList().getPresentableText(false)); |
| } |
| else if (myImportable instanceof PyClass) { |
| final PyClass[] supers = ((PyClass)myImportable).getSuperClasses(); |
| if (supers.length > 0) { |
| sb.append("("); |
| // ", ".join(x.getName() for x in getSuperClasses()) |
| final String[] superNames = new String[supers.length]; |
| for (int i = 0; i < supers.length; i += 1) { |
| superNames[i] = supers[i].getName(); |
| } |
| sb.append(StringUtil.join(superNames, ", ")); |
| sb.append(")"); |
| } |
| } |
| if (parent instanceof PyFromImportStatement) { |
| sb.append(" from "); |
| final PyFromImportStatement fromImportStatement = (PyFromImportStatement)parent; |
| sb.append(StringUtil.repeat(".", fromImportStatement.getRelativeLevel())); |
| final PyReferenceExpression source = fromImportStatement.getImportSource(); |
| if (source != null) { |
| sb.append(source.getReferencedName()); |
| } |
| } |
| return sb.toString(); |
| } |
| |
| public int compareTo(@NotNull ImportCandidateHolder rhs) { |
| final int lRelevance = getRelevance(); |
| final int rRelevance = rhs.getRelevance(); |
| if (rRelevance != lRelevance) { |
| return rRelevance - lRelevance; |
| } |
| // prefer shorter paths |
| if (myPath != null && rhs.myPath != null) { |
| return myPath.getComponentCount() - rhs.myPath.getComponentCount(); |
| } |
| return 0; |
| } |
| |
| int getRelevance() { |
| final Project project = myImportable.getProject(); |
| final PsiFile psiFile = myImportable.getContainingFile(); |
| final VirtualFile vFile = psiFile == null ? null : psiFile.getVirtualFile(); |
| if (vFile == null) return 0; |
| final ProjectFileIndex fileIndex = ProjectRootManager.getInstance(project).getFileIndex(); |
| // files under project source are most relevant |
| final Module module = fileIndex.getModuleForFile(vFile); |
| if (module != null) return 3; |
| // then come files directly under Lib |
| if (vFile.getParent().getName().equals("Lib")) return 2; |
| // tests we don't want |
| if (vFile.getParent().getName().equals("test")) return 0; |
| return 1; |
| } |
| } |