intial source from ttp://www.sf.net/projects/wdte

[phpeclipse.git] / archive / net.sourceforge.phpeclipse.css.ui / src / net / sourceforge / phpeclipse / css / ui / internal / text / CssAnnotationHover.java

diff --git a/archive/net.sourceforge.phpeclipse.css.ui/src/net/sourceforge/phpeclipse/css/ui/internal/text/CssAnnotationHover.java b/archive/net.sourceforge.phpeclipse.css.ui/src/net/sourceforge/phpeclipse/css/ui/internal/text/CssAnnotationHover.java
new file mode 100644 (file)
index 0000000..d2a68b2
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+++ b/archive/net.sourceforge.phpeclipse.css.ui/src/net/sourceforge/phpeclipse/css/ui/internal/text/CssAnnotationHover.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2003-2004 Christopher Lenz and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     Christopher Lenz - initial API and implementation
+ * 
+ * $Id: CssAnnotationHover.java,v 1.1 2004-09-02 18:11:48 jsurfer Exp $
+ */
+
+package net.sourceforge.phpeclipse.css.ui.internal.text;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.Position;
+import org.eclipse.jface.text.source.Annotation;
+import org.eclipse.jface.text.source.IAnnotationHover;
+import org.eclipse.jface.text.source.IAnnotationModel;
+import org.eclipse.jface.text.source.ISourceViewer;
+
+
+/**
+ * Implements simple annotation hover to show the associated messages.
+ */
+public class CssAnnotationHover implements IAnnotationHover {
+       /*
+        * @see IVerticalRulerHover#getHoverInfo(ISourceViewer, int)
+        */
+       public String getHoverInfo(ISourceViewer sourceViewer, int lineNumber) {
+               List annotations = getAnnotationsForLine(sourceViewer, lineNumber);
+               if (annotations != null) {
+                       List messages = new ArrayList();
+
+                       Iterator e = annotations.iterator();
+                       while (e.hasNext()) {
+                               Annotation annotation = (Annotation) e.next();
+                               String message = annotation.getText();
+                               if (message != null) {
+                                       message = message.trim();
+                                       if (message.length() > 0) {
+                                               messages.add(message);
+                                       }
+                               }
+                       }
+
+                       if (messages.size() == 1) {
+                               return (String) messages.get(0);
+                       }
+
+                       if (messages.size() > 1) {
+                               return formatMessages(messages);
+                       }
+               }
+
+               return null;
+       }
+
+       /**
+        * Formats multiple annotation messages for display.
+        */
+       private String formatMessages(List messages) {
+               StringBuffer buffer = new StringBuffer();
+
+               Iterator e = messages.iterator();
+               while (e.hasNext())  {
+                       buffer.append("- "); //$NON-NLS-1$
+                       buffer.append(e.next());
+                       buffer.append('\n');
+               }
+
+               return buffer.toString();
+       }
+
+       /**
+        * Returns annotations for the ruler's line of activity.
+        */
+       private List getAnnotationsForLine(ISourceViewer viewer, int line) {
+               IDocument document = viewer.getDocument();
+
+               IAnnotationModel model = viewer.getAnnotationModel();
+               if (model == null) {
+                       return null;
+               }
+
+               List retVal = new ArrayList();
+
+               Iterator e = model.getAnnotationIterator();
+               while (e.hasNext()) {
+                       Annotation a = (Annotation) e.next();
+                       Position position = model.getPosition(a);
+                       if (position != null) {
+                               try {
+                                       int annotationLine = document
+                                                       .getLineOfOffset(position.getOffset());
+                                       if (annotationLine == line) {
+                                               retVal.add(a);
+                                       }
+                               } catch (BadLocationException e1) {
+                                       // ignore
+                               }
+                       }
+               }
+
+               return retVal;
+       }
+}