collapse project path to ~/path if project is placed under user home dir [mac & linux] in frame title & project view

platform/lang-api/src/com/intellij/openapi/project/ProjectUtil.java

@@ -21,14 +21,49 @@ package com.intellij.openapi.project;
 
 import com.intellij.openapi.module.Module;
 import com.intellij.openapi.module.ModuleUtil;
+import com.intellij.openapi.util.SystemInfo;
+import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.openapi.vfs.VirtualFilePathWrapper;
+import com.intellij.util.SystemProperties;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.File;
+import java.io.IOException;
+
 public class ProjectUtil {
   private ProjectUtil() {
   }
 
+  @Nullable
+  public static String getProjectLocationString(@NotNull final Project project) {
+    String projectPath = project.getLocation();
+    return getLocationRelativeToUserHome(projectPath);
+  }
+  
+  @Nullable
+  public static String getLocationRelativeToUserHome(final String path) {
+    if (path == null) return null;
+    
+    String _path = path;
+    
+    if ((SystemInfo.isLinux || SystemInfo.isMac)) {
+      final File projectDir = new File(path);
+      final File userHomeDir = new File(SystemProperties.getUserHome());
+      try {
+        if (FileUtil.isAncestor(userHomeDir, projectDir, true)) {
+          _path = "~/" + FileUtil.getRelativePath(userHomeDir, projectDir);
+        }
+      }
+      catch (IOException e) {
+        // nothing
+      }
+    }
+
+    return _path;
+  }
+  
   public static String calcRelativeToProjectPath(final VirtualFile file, final Project project) {
     if (file instanceof VirtualFilePathWrapper) {
       return ((VirtualFilePathWrapper)file).getPresentablePath();

platform/lang-impl/src/com/intellij/ide/projectView/impl/nodes/PsiDirectoryNode.java

@@ -27,6 +27,7 @@ import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.module.Module;
 import com.intellij.openapi.module.ModuleUtil;
 import com.intellij.openapi.project.Project;
+import com.intellij.openapi.project.ProjectUtil;
 import com.intellij.openapi.roots.ProjectFileIndex;
 import com.intellij.openapi.roots.ProjectRootManager;
 import com.intellij.openapi.roots.ui.configuration.ProjectSettingsService;
@@ -81,7 +82,11 @@ public class PsiDirectoryNode extends BasePsiNode<PsiDirectory> implements Navig
         }
 
         if (parentValue instanceof Project || parentValue instanceof Module) {
-          data.addText(" (" + directoryFile.getPresentableUrl() + ")", SimpleTextAttributes.GRAYED_ATTRIBUTES);
+          if (parentValue instanceof Project) {
+            data.addText(" (" + ProjectUtil.getLocationRelativeToUserHome(directoryFile.getPresentableUrl()) + ")", SimpleTextAttributes.GRAYED_ATTRIBUTES);
+          } else {
+            data.addText(" (" + directoryFile.getPresentableUrl() + ")", SimpleTextAttributes.GRAYED_ATTRIBUTES);
+          }
         }
         else if (ProjectRootsUtil.isSourceOrTestRoot(directoryFile, project)) {
           if (ProjectRootsUtil.isInTestSource(directoryFile, project)) {

platform/platform-impl/src/com/intellij/openapi/wm/impl/PlatformFrameTitleBuilder.java

@@ -16,6 +16,7 @@
 package com.intellij.openapi.wm.impl;
 
 import com.intellij.openapi.project.Project;
+import com.intellij.openapi.project.ProjectUtil;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.openapi.vfs.VirtualFilePathWrapper;
 import com.intellij.platform.ProjectBaseDirectory;
@@ -27,7 +28,7 @@ public class PlatformFrameTitleBuilder extends FrameTitleBuilder {
   public String getProjectTitle(final Project project) {
     final VirtualFile baseDir = project.getBaseDir();
     if (baseDir != null) {
-      return project.getName() + " - [" + baseDir.getPresentableUrl() + "]";
+      return project.getName() + " - [" + ProjectUtil.getLocationRelativeToUserHome(baseDir.getPresentableUrl()) + "]";
     }
     return project.getName();
   }