images/src/org/intellij/images/fileTypes/ImageDocumentationProvider.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 package org.intellij.images.fileTypes;
  17
  18 import com.intellij.lang.documentation.QuickDocumentationProvider;
  19 import com.intellij.openapi.util.SystemInfo;
  20 import com.intellij.openapi.vfs.VirtualFile;
  21 import com.intellij.openapi.vfs.VirtualFileWithId;
  22 import com.intellij.psi.PsiElement;
  23 import com.intellij.psi.PsiFileSystemItem;
  24 import com.intellij.util.indexing.FileBasedIndex;
  25 import org.intellij.images.index.ImageInfoIndex;
  26
  27 import java.net.URI;
  28 import java.net.URISyntaxException;
  29
  30 /**
  31  * @author spleaner
  32  */
  33 public class ImageDocumentationProvider extends QuickDocumentationProvider {
  34   private static final int MAX_IMAGE_SIZE = 300;
  35
  36   public String getQuickNavigateInfo(PsiElement element) {
  37     return null;
  38   }
  39
  40   @Override
  41   public String generateDoc(PsiElement element, PsiElement originalElement) {
  42     final String[] result = new String[] {null};
  43
  44     if (element instanceof PsiFileSystemItem && !((PsiFileSystemItem)element).isDirectory()) {
  45       final VirtualFile file = ((PsiFileSystemItem)element).getVirtualFile();
  46       if (file instanceof VirtualFileWithId) {
  47         ImageInfoIndex.processValues(file, new FileBasedIndex.ValueProcessor<ImageInfoIndex.ImageInfo>() {
  48           public boolean process(VirtualFile file, ImageInfoIndex.ImageInfo value) {
  49             int imageWidth = value.width;
  50             int imageHeight = value.height;
  51
  52             int maxSize = Math.max(value.width, value.height);
  53             if (maxSize > MAX_IMAGE_SIZE) {
  54               double scaleFactor = (double)MAX_IMAGE_SIZE / (double)maxSize;
  55               imageWidth *= scaleFactor;
  56               imageHeight *= scaleFactor;
  57             }
  58             try {
  59               String path = file.getPath();
  60               if (SystemInfo.isWindows) {
  61                 path = "/" + path;
  62               }
  63               final String url = new URI("file", null, path, null).toString();
  64               result[0] = String.format("<html><body><img src=\"%s\" width=\"%s\" height=\"%s\"><p>%sx%s, %sbpp</p><body></html>", url, imageWidth,
  65                                    imageHeight, value.width, value.height, value.bpp);
  66             }
  67             catch (URISyntaxException e) {
  68               // nothing
  69             }
  70             return true;
  71           }
  72         }, element.getProject());
  73       }
  74     }
  75
  76     return result[0];
  77   }
  78 }