--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/text/source/projection/ProjectionAnnotationHover.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,192 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.text.source.projection.ProjectionAnnotationHover;
+
+import dwt.dwthelper.utils;
+
+import java.util.Iterator;
+
+import dwt.widgets.Shell;
+import dwtx.jface.resource.JFaceResources;
+import dwtx.jface.text.BadLocationException;
+import dwtx.jface.text.IDocument;
+import dwtx.jface.text.IInformationControl;
+import dwtx.jface.text.IInformationControlCreator;
+import dwtx.jface.text.IRegion;
+import dwtx.jface.text.Position;
+import dwtx.jface.text.information.IInformationProviderExtension2;
+import dwtx.jface.text.source.IAnnotationHover;
+import dwtx.jface.text.source.IAnnotationHoverExtension;
+import dwtx.jface.text.source.IAnnotationModel;
+import dwtx.jface.text.source.IAnnotationModelExtension;
+import dwtx.jface.text.source.ILineRange;
+import dwtx.jface.text.source.ISourceViewer;
+import dwtx.jface.text.source.ISourceViewerExtension2;
+import dwtx.jface.text.source.LineRange;
+
+/**
+ * Annotation hover for projection annotations.
+ *
+ * @since 3.0
+ */
+class ProjectionAnnotationHover : IAnnotationHover, IAnnotationHoverExtension, IInformationProviderExtension2 {
+    
+    
+    private IInformationControlCreator fInformationControlCreator;
+    private IInformationControlCreator fInformationPresenterControlCreator;
+
+    /**
+     * Sets the hover control creator for this projection annotation hover.
+     *
+     * @param creator the creator
+     */
+    public void setHoverControlCreator(IInformationControlCreator creator) {
+        fInformationControlCreator= creator;
+    }
+    
+    /**
+     * Sets the information presenter control creator for this projection annotation hover.
+     *
+     * @param creator the creator
+     * @since 3.3
+     */
+    public void setInformationPresenterControlCreator(IInformationControlCreator creator) {
+        fInformationPresenterControlCreator= creator;
+    }
+
+    /*
+     * @see dwtx.jface.text.source.IAnnotationHover#getHoverInfo(dwtx.jface.text.source.ISourceViewer, int)
+     */
+    public String getHoverInfo(ISourceViewer sourceViewer, int lineNumber) {
+        // this is a no-op as semantics is defined by the implementation of the annotation hover extension
+        return null;
+    }
+
+    /*
+     * @since 3.1
+     */
+    private bool isCaptionLine(ProjectionAnnotation annotation, Position position, IDocument document, int line) {
+        if (position.getOffset() > -1 && position.getLength() > -1) {
+            try {
+                int captionOffset;
+                if (position instanceof IProjectionPosition)
+                    captionOffset= ((IProjectionPosition) position).computeCaptionOffset(document);
+                else
+                    captionOffset= 0;
+                int startLine= document.getLineOfOffset(position.getOffset() + captionOffset);
+                return line is startLine;
+            } catch (BadLocationException x) {
+            }
+        }
+        return false;
+    }
+
+    private String getProjectionTextAtLine(ISourceViewer viewer, int line, int numberOfLines) {
+
+        IAnnotationModel model= null;
+        if (viewer instanceof ISourceViewerExtension2) {
+            ISourceViewerExtension2 viewerExtension= (ISourceViewerExtension2) viewer;
+            IAnnotationModel visual= viewerExtension.getVisualAnnotationModel();
+            if (visual instanceof IAnnotationModelExtension) {
+                IAnnotationModelExtension modelExtension= (IAnnotationModelExtension) visual;
+                model= modelExtension.getAnnotationModel(ProjectionSupport.PROJECTION);
+            }
+        }
+
+        if (model !is null) {
+            try {
+                IDocument document= viewer.getDocument();
+                Iterator e= model.getAnnotationIterator();
+                while (e.hasNext()) {
+                    ProjectionAnnotation annotation= (ProjectionAnnotation) e.next();
+                    if (!annotation.isCollapsed())
+                        continue;
+
+                    Position position= model.getPosition(annotation);
+                    if (position is null)
+                        continue;
+
+                    if (isCaptionLine(annotation, position, document, line))
+                        return getText(document, position.getOffset(), position.getLength(), numberOfLines);
+
+                }
+            } catch (BadLocationException x) {
+            }
+        }
+
+        return null;
+    }
+
+    private String getText(IDocument document, int offset, int length, int numberOfLines) throws BadLocationException {
+        int endOffset= offset + length;
+
+        try {
+            int endLine= document.getLineOfOffset(offset) + Math.max(0, numberOfLines -1);
+            IRegion lineInfo= document.getLineInformation(endLine);
+            endOffset= Math.min(endOffset, lineInfo.getOffset() + lineInfo.getLength());
+        } catch (BadLocationException x) {
+        }
+
+        return document.get(offset, endOffset - offset);
+    }
+
+    /*
+     * @see dwtx.jface.text.source.IAnnotationHoverExtension#getHoverInfo(dwtx.jface.text.source.ISourceViewer, dwtx.jface.text.source.ILineRange, int)
+     */
+    public Object getHoverInfo(ISourceViewer sourceViewer, ILineRange lineRange, int visibleLines) {
+        return getProjectionTextAtLine(sourceViewer, lineRange.getStartLine(), visibleLines);
+    }
+
+    /*
+     * @see dwtx.jface.text.source.IAnnotationHoverExtension#getHoverLineRange(dwtx.jface.text.source.ISourceViewer, int)
+     */
+    public ILineRange getHoverLineRange(ISourceViewer viewer, int lineNumber) {
+        return new LineRange(lineNumber, 1);
+    }
+
+    /*
+     * @see dwtx.jface.text.source.IAnnotationHoverExtension#canHandleMouseCursor()
+     */
+    public bool canHandleMouseCursor() {
+        return false;
+    }
+
+    /*
+     * @see dwtx.jface.text.source.IAnnotationHoverExtension#getHoverControlCreator()
+     */
+    public IInformationControlCreator getHoverControlCreator() {
+        if (fInformationControlCreator is null) {
+            fInformationControlCreator= new IInformationControlCreator() {
+                public IInformationControl createInformationControl(Shell parent) {
+                    return new SourceViewerInformationControl(parent, false, JFaceResources.TEXT_FONT, null);
+                }
+            };
+        }
+        return fInformationControlCreator;
+    }
+
+    /*
+     * @see dwtx.jface.text.information.IInformationProviderExtension2#getInformationPresenterControlCreator()
+     * @since 3.3
+     */
+    public IInformationControlCreator getInformationPresenterControlCreator() {
+        if (fInformationPresenterControlCreator is null) {
+            fInformationPresenterControlCreator= new IInformationControlCreator() {
+                public IInformationControl createInformationControl(Shell parent) {
+                    return new SourceViewerInformationControl(parent, true, JFaceResources.TEXT_FONT, null);
+                }
+            };
+        }
+        return fInformationPresenterControlCreator;
+    }
+}