| /* |
| * Copyright 2000-2009 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.intellij.ide; |
| |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.fileTypes.FileType; |
| import com.intellij.openapi.fileTypes.INativeFileType; |
| import com.intellij.openapi.fileTypes.UnknownFileType; |
| import com.intellij.openapi.project.DumbAware; |
| import com.intellij.openapi.util.Iconable; |
| import com.intellij.openapi.util.SystemInfo; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFileSystemItem; |
| import com.intellij.psi.impl.ElementBase; |
| import com.intellij.ui.DeferredIconImpl; |
| import com.intellij.util.Function; |
| import com.intellij.util.ui.update.ComparableObject; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import javax.swing.*; |
| import java.io.File; |
| import java.util.*; |
| |
| /** |
| * @author yole |
| */ |
| public class NativeIconProvider extends IconProvider implements DumbAware { |
| private final Map<Ext, Icon> myIconCache = new HashMap<Ext, Icon>(); |
| // on Windows .exe and .ico files provide their own icons which can differ for each file, cache them by full file path |
| private final Set<Ext> myCustomIconExtensions = |
| SystemInfo.isWindows ? new HashSet<Ext>(Arrays.asList(new Ext("exe"), new Ext("ico"))) : new HashSet<Ext>(); |
| private final Map<String, Icon> myCustomIconCache = new HashMap<String, Icon>(); |
| |
| private static final Ext NO_EXT = new Ext(null); |
| |
| private static final Ext CLOSED_DIR = new Ext(null, 0); |
| |
| @Nullable |
| @Override |
| public Icon getIcon(@NotNull PsiElement element, @Iconable.IconFlags int flags) { |
| if (element instanceof PsiFileSystemItem) { |
| VirtualFile file = ((PsiFileSystemItem)element).getVirtualFile(); |
| if (file != null) return doGetIcon(file, flags); |
| } |
| return null; |
| } |
| |
| @Nullable |
| private Icon doGetIcon(@NotNull VirtualFile file, final int flags) { |
| if (!isNativeFileType(file)) return null; |
| |
| final Ext ext = getExtension(file, flags); |
| final String filePath = file.getPath(); |
| |
| Icon icon; |
| synchronized (myIconCache) { |
| if (!myCustomIconExtensions.contains(ext)) { |
| icon = ext != null ? myIconCache.get(ext) : null; |
| } |
| else { |
| icon = filePath != null ? myCustomIconCache.get(filePath) : null; |
| } |
| } |
| if (icon != null) { |
| return icon; |
| } |
| return new DeferredIconImpl<VirtualFile>(ElementBase.ICON_PLACEHOLDER.getValue(), file, false, new Function<VirtualFile, Icon>() { |
| @Override |
| public Icon fun(VirtualFile virtualFile) { |
| final File f = new File(filePath); |
| if (!f.exists()) { |
| return null; |
| } |
| Icon icon; |
| try { // VM will ensure lock to init -static final field--, note we should have no read access here, to avoid deadlock with EDT needed to init component |
| assert SwingComponentHolder.ourFileChooser != null || !ApplicationManager.getApplication().isReadAccessAllowed(); |
| icon = getNativeIcon(f); |
| } |
| catch (Exception e) { // see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4854174 |
| return null; |
| } |
| if (ext != null) { |
| synchronized (myIconCache) { |
| if (!myCustomIconExtensions.contains(ext)) { |
| myIconCache.put(ext, icon); |
| } |
| else if (filePath != null) { |
| myCustomIconCache.put(filePath, icon); |
| } |
| } |
| } |
| return icon; |
| } |
| }); |
| } |
| |
| @Nullable |
| public static Icon getNativeIcon(@Nullable File file) { |
| return file == null ? null : SwingComponentHolder.ourFileChooser.getIcon(file); |
| } |
| |
| private static Ext getExtension(final VirtualFile file, final int flags) { |
| if (file.isDirectory()) { |
| if (file.getExtension() == null) { |
| return CLOSED_DIR; |
| } else { |
| return new Ext(file.getExtension(), flags); |
| } |
| } |
| |
| return file.getExtension() != null ? new Ext(file.getExtension()) : NO_EXT; |
| } |
| |
| static class SwingComponentHolder { |
| private static final JFileChooser ourFileChooser = new JFileChooser(); |
| } |
| |
| protected boolean isNativeFileType(VirtualFile file) { |
| FileType type = file.getFileType(); |
| |
| if (type instanceof INativeFileType) return ((INativeFileType)type).useNativeIcon(); |
| return type instanceof UnknownFileType && !file.isDirectory(); |
| } |
| |
| private static class Ext extends ComparableObject.Impl { |
| private final Object[] myText; |
| |
| private Ext(@Nullable String text) { |
| myText = new Object[] {text}; |
| } |
| |
| private Ext(@Nullable String text, final int flags) { |
| myText = new Object[] {text, flags}; |
| } |
| |
| @Override |
| @NotNull |
| public Object[] getEqualityObjects() { |
| return myText; |
| } |
| |
| @Override |
| public String toString() { |
| return myText[0] != null ? myText[0].toString() : null; |
| } |
| } |
| } |