Bug 60838 - Support matchesContentType property test

1 files changed, 32 insertions, 0 deletions

diff --git a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/ResourceExtender.java b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/ResourceExtender.java
index 7b588cbe3..368975471 100644
--- a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/ResourceExtender.java
+++ b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/ResourceExtender.java
@@ -11,9 +11,12 @@
 package org.eclipse.debug.internal.ui;
 
 import org.eclipse.core.expressions.PropertyTester;
+import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.content.IContentDescription;
+import org.eclipse.core.runtime.content.IContentType;
 
 /**
  * ResourceExtender provides property testers for the XML expression
@@ -27,6 +30,7 @@ public class ResourceExtender extends PropertyTester {
 	private static final String PROPERTY_MATCHES_PATTERN= "matchesPattern";	 //$NON-NLS-1$
 	private static final String PROJECT_NATURE = "projectNature";	 //$NON-NLS-1$
 	private static final String CAN_DELETE= "canDelete"; //$NON-NLS-1$
+	private static final String PROPERTY_MATCHES_CONTENT_TYPE= "matchesContentType"; //$NON-NLS-1$
 	
 	/* (non-Javadoc)
 	 * @see org.eclipse.jdt.internal.corext.refactoring.participants.properties.IPropertyEvaluator#test(java.lang.Object, java.lang.String, java.lang.String)
@@ -46,6 +50,34 @@ public class ResourceExtender extends PropertyTester {
 			}
 		} else if (CAN_DELETE.equals(method)) {
 			return canDelete(resource);
+		} else if (PROPERTY_MATCHES_CONTENT_TYPE.equals(method)) {
+			return matchesContentType(resource, (String) expectedValue);
+		}
+		return false;
+	}
+	
+	/**
+	 * Returns whether or not the given file's content type matches
+	 * the specified content type.
+	 * 
+	 * Content types are looked up in the content type registry.
+	 * 
+	 * @return whether or not the given resource has the given content type
+	 */
+	private boolean matchesContentType(IResource resource, String contentType) {
+		if (resource == null || !(resource instanceof IFile) || !resource.exists()) {
+			return false;
+		}
+		IFile file= (IFile) resource;
+		IContentDescription description;
+		try {
+			description = file.getContentDescription();
+		} catch (CoreException e) {
+			return false;
+		}
+		if (description != null) {
+			IContentType type= description.getContentType();
+			return contentType.equals(type.getId());
 		}
 		return false;
 	}