platform/lang-impl/src/com/intellij/ide/util/DeleteHandler.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package com.intellij.ide.util;
  18
  19 import com.intellij.CommonBundle;
  20 import com.intellij.history.LocalHistory;
  21 import com.intellij.history.LocalHistoryAction;
  22 import com.intellij.ide.DataManager;
  23 import com.intellij.ide.DeleteProvider;
  24 import com.intellij.ide.IdeBundle;
  25 import com.intellij.openapi.actionSystem.DataConstants;
  26 import com.intellij.openapi.actionSystem.DataContext;
  27 import com.intellij.openapi.actionSystem.PlatformDataKeys;
  28 import com.intellij.openapi.application.ApplicationManager;
  29 import com.intellij.openapi.command.CommandProcessor;
  30 import com.intellij.openapi.fileTypes.FileTypeManager;
  31 import com.intellij.openapi.project.DumbService;
  32 import com.intellij.openapi.project.Project;
  33 import com.intellij.openapi.ui.Messages;
  34 import com.intellij.openapi.ui.ex.MessagesEx;
  35 import com.intellij.openapi.vfs.VirtualFile;
  36 import com.intellij.psi.PsiCompiledElement;
  37 import com.intellij.psi.PsiDirectory;
  38 import com.intellij.psi.PsiElement;
  39 import com.intellij.psi.PsiFile;
  40 import com.intellij.psi.util.PsiTreeUtil;
  41 import com.intellij.refactoring.RefactoringBundle;
  42 import com.intellij.refactoring.safeDelete.SafeDeleteProcessor;
  43 import com.intellij.refactoring.util.CommonRefactoringUtil;
  44 import com.intellij.refactoring.util.RefactoringUIUtil;
  45 import com.intellij.util.IncorrectOperationException;
  46 import com.intellij.util.io.ReadOnlyAttributeUtil;
  47 import org.jetbrains.annotations.Nullable;
  48
  49 import java.io.IOException;
  50 import java.util.ArrayList;
  51 import java.util.Arrays;
  52
  53 public class DeleteHandler {
  54   public static class DefaultDeleteProvider implements DeleteProvider {
  55     public boolean canDeleteElement(DataContext dataContext) {
  56       if (dataContext.getData(DataConstants.PROJECT) == null) return false;
  57       final PsiElement[] elements = getPsiElements(dataContext);
  58       return elements != null && DeleteHandler.shouldEnableDeleteAction(elements);
  59     }
  60
  61     @Nullable
  62     private PsiElement[] getPsiElements(DataContext dataContext) {
  63       PsiElement[] elements = (PsiElement[])dataContext.getData(DataConstants.PSI_ELEMENT_ARRAY);
  64       if (elements == null) {
  65         final Object data = dataContext.getData(DataConstants.PSI_ELEMENT);
  66         if (data != null) {
  67           elements = new PsiElement[]{(PsiElement)data};
  68         }
  69         else {
  70           final Object data1 = dataContext.getData(DataConstants.PSI_FILE);
  71           if (data1 != null) {
  72             elements = new PsiElement[]{(PsiFile)data1};
  73           }
  74         }
  75       }
  76       return elements;
  77     }
  78
  79     public void deleteElement(DataContext dataContext) {
  80       PsiElement[] elements = getPsiElements(dataContext);
  81       if (elements == null) return;
  82       Project project = PlatformDataKeys.PROJECT.getData(dataContext);
  83       if (project == null) return;
  84       LocalHistoryAction a = LocalHistory.startAction(project, IdeBundle.message("progress.deleting"));
  85       try {
  86         deletePsiElement(elements, project);
  87       }
  88       finally {
  89         a.finish();
  90       }
  91     }
  92   }
  93
  94   public static void deletePsiElement(final PsiElement[] elementsToDelete, final Project project) {
  95     if (elementsToDelete == null || elementsToDelete.length == 0) return;
  96
  97     final PsiElement[] elements = PsiTreeUtil.filterAncestors(elementsToDelete);
  98
  99     boolean safeDeleteApplicable = true;
 100     for (int i = 0; i < elements.length && safeDeleteApplicable; i++) {
 101       PsiElement element = elements[i];
 102       safeDeleteApplicable = SafeDeleteProcessor.validElement(element);
 103     }
 104
 105     final boolean dumb = DumbService.getInstance(project).isDumb();
 106     if (safeDeleteApplicable && !dumb) {
 107       DeleteDialog dialog = new DeleteDialog(project, elements, new DeleteDialog.Callback() {
 108         public void run(final DeleteDialog dialog) {
 109           if (!CommonRefactoringUtil.checkReadOnlyStatusRecursively(project, Arrays.asList(elements))) return;
 110           SafeDeleteProcessor.createInstance(project, new Runnable() {
 111             public void run() {
 112               dialog.close(DeleteDialog.CANCEL_EXIT_CODE);
 113             }
 114           }, elements, dialog.isSearchInComments(), dialog.isSearchInNonJava(), true).run();
 115         }
 116       });
 117       dialog.show();
 118       if (!dialog.isOK()) return;
 119     }
 120     else {
 121       @SuppressWarnings({"UnresolvedPropertyKey"})
 122       String warningMessage = DeleteUtil.generateWarningMessage(IdeBundle.message("prompt.delete.elements"), elements);
 123
 124       boolean anyDirectories = false;
 125       String directoryName = null;
 126       for (PsiElement psiElement : elementsToDelete) {
 127         if (psiElement instanceof PsiDirectory) {
 128           anyDirectories = true;
 129           directoryName = ((PsiDirectory)psiElement).getName();
 130           break;
 131         }
 132       }
 133       if (anyDirectories) {
 134         if (elements.length == 1) {
 135           warningMessage += IdeBundle.message("warning.delete.all.files.and.subdirectories", directoryName);
 136         }
 137         else {
 138           warningMessage += IdeBundle.message("warning.delete.all.files.and.subdirectories.in.the.selected.directory");
 139         }
 140       }
 141
 142       if (safeDeleteApplicable && dumb) {
 143         warningMessage += "\n\nWarning:\n  Safe delete is not available while IntelliJ IDEA updates indices,\n  no usages will be checked.";
 144       }
 145
 146       int result = Messages.showDialog(project, warningMessage, IdeBundle.message("title.delete"),
 147                                        new String[]{CommonBundle.getOkButtonText(), CommonBundle.getCancelButtonText()}, 0,
 148                                        Messages.getQuestionIcon());
 149       if (result != 0) return;
 150     }
 151
 152     final FileTypeManager ftManager = FileTypeManager.getInstance();
 153     CommandProcessor.getInstance().executeCommand(project, new Runnable() {
 154       public void run() {
 155         CommonRefactoringUtil.checkReadOnlyStatusRecursively(project, Arrays.asList(elements), false);
 156
 157         // deleted from project view or something like that.
 158         if (PlatformDataKeys.EDITOR.getData(DataManager.getInstance().getDataContext()) == null) {
 159           CommandProcessor.getInstance().markCurrentCommandAsGlobal(project);
 160         }
 161
 162         for (final PsiElement elementToDelete : elements) {
 163           if (!elementToDelete.isValid()) continue; //was already deleted
 164           if (elementToDelete instanceof PsiDirectory) {
 165             VirtualFile virtualFile = ((PsiDirectory)elementToDelete).getVirtualFile();
 166             if (virtualFile.isInLocalFileSystem()) {
 167
 168               ArrayList<VirtualFile> readOnlyFiles = new ArrayList<VirtualFile>();
 169               getReadOnlyVirtualFiles(virtualFile, readOnlyFiles, ftManager);
 170
 171               if (readOnlyFiles.size() > 0) {
 172                 int _result = Messages.showYesNoDialog(project, IdeBundle.message("prompt.directory.contains.read.only.files",
 173                                                                                   virtualFile.getPresentableUrl()),
 174                                                        IdeBundle.message("title.delete"), Messages.getQuestionIcon());
 175                 if (_result != 0) continue;
 176
 177                 boolean success = true;
 178                 for (VirtualFile file : readOnlyFiles) {
 179                   success = clearReadOnlyFlag(file, project);
 180                   if (!success) break;
 181                 }
 182                 if (!success) continue;
 183               }
 184             }
 185           }
 186           else if (!elementToDelete.isWritable()) {
 187             final PsiFile file = elementToDelete.getContainingFile();
 188             if (file != null) {
 189               final VirtualFile virtualFile = file.getVirtualFile();
 190               if (virtualFile.isInLocalFileSystem()) {
 191                 int _result = MessagesEx.fileIsReadOnly(project, virtualFile)
 192                   .setTitle(IdeBundle.message("title.delete"))
 193                   .appendMessage(IdeBundle.message("prompt.delete.it.anyway"))
 194                   .askYesNo();
 195                 if (_result != 0) continue;
 196
 197                 boolean success = clearReadOnlyFlag(virtualFile, project);
 198                 if (!success) continue;
 199               }
 200             }
 201           }
 202
 203           try {
 204             elementToDelete.checkDelete();
 205           }
 206           catch (IncorrectOperationException ex) {
 207             Messages.showMessageDialog(project, ex.getMessage(), CommonBundle.getErrorTitle(), Messages.getErrorIcon());
 208             continue;
 209           }
 210
 211           ApplicationManager.getApplication().runWriteAction(new Runnable() {
 212             public void run() {
 213               try {
 214                 elementToDelete.delete();
 215               }
 216               catch (final IncorrectOperationException ex) {
 217                 ApplicationManager.getApplication().invokeLater(new Runnable() {
 218                   public void run() {
 219                     Messages.showMessageDialog(project, ex.getMessage(), CommonBundle.getErrorTitle(), Messages.getErrorIcon());
 220                   }
 221                 });
 222               }
 223             }
 224           });
 225         }
 226       }
 227     }, RefactoringBundle.message("safe.delete.command", RefactoringUIUtil.calculatePsiElementDescriptionList(elements)), null);
 228   }
 229
 230   private static boolean clearReadOnlyFlag(final VirtualFile virtualFile, final Project project) {
 231     final boolean[] success = new boolean[1];
 232     CommandProcessor.getInstance().executeCommand(project, new Runnable() {
 233       public void run() {
 234         Runnable action = new Runnable() {
 235           public void run() {
 236             try {
 237               ReadOnlyAttributeUtil.setReadOnlyAttribute(virtualFile, false);
 238               success[0] = true;
 239             }
 240             catch (IOException e1) {
 241               Messages.showMessageDialog(project, e1.getMessage(), CommonBundle.getErrorTitle(), Messages.getErrorIcon());
 242             }
 243           }
 244         };
 245         ApplicationManager.getApplication().runWriteAction(action);
 246       }
 247     }, "", null);
 248     return success[0];
 249   }
 250
 251   /**
 252    * Fills readOnlyFiles with VirtualFiles
 253    */
 254   private static void getReadOnlyVirtualFiles(VirtualFile file, ArrayList<VirtualFile> readOnlyFiles, final FileTypeManager ftManager) {
 255     if (ftManager.isFileIgnored(file.getName())) return;
 256     if (!file.isWritable()) {
 257       readOnlyFiles.add(file);
 258     }
 259     if (file.isDirectory()) {
 260       VirtualFile[] children = file.getChildren();
 261       for (VirtualFile child : children) {
 262         getReadOnlyVirtualFiles(child, readOnlyFiles, ftManager);
 263       }
 264     }
 265   }
 266
 267   public static boolean shouldEnableDeleteAction(PsiElement[] elements) {
 268     if (elements == null || elements.length == 0) return false;
 269     for (PsiElement element : elements) {
 270       if (element instanceof PsiCompiledElement) {
 271         return false;
 272       }
 273     }
 274     return true;
 275   }
 276 }