--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface.text/src/org/eclipse/jface/text/hyperlink/DefaultHyperlinkPresenter.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,397 @@
+/*******************************************************************************
+ * 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 org.eclipse.jface.text.hyperlink.DefaultHyperlinkPresenter;
+
+import org.eclipse.jface.text.hyperlink.IHyperlinkPresenterExtension; // packageimport
+import org.eclipse.jface.text.hyperlink.MultipleHyperlinkPresenter; // packageimport
+import org.eclipse.jface.text.hyperlink.HyperlinkManager; // packageimport
+import org.eclipse.jface.text.hyperlink.URLHyperlink; // packageimport
+import org.eclipse.jface.text.hyperlink.IHyperlinkDetectorExtension2; // packageimport
+import org.eclipse.jface.text.hyperlink.IHyperlinkDetector; // packageimport
+import org.eclipse.jface.text.hyperlink.IHyperlinkPresenter; // packageimport
+import org.eclipse.jface.text.hyperlink.URLHyperlinkDetector; // packageimport
+import org.eclipse.jface.text.hyperlink.AbstractHyperlinkDetector; // packageimport
+import org.eclipse.jface.text.hyperlink.IHyperlinkDetectorExtension; // packageimport
+import org.eclipse.jface.text.hyperlink.HyperlinkMessages; // packageimport
+import org.eclipse.jface.text.hyperlink.IHyperlink; // packageimport
+
+
+import java.lang.all;
+import java.util.Set;
+
+
+
+
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.custom.StyleRange;
+import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.Cursor;
+import org.eclipse.swt.graphics.RGB;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.preference.PreferenceConverter;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.DocumentEvent;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IDocumentListener;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextInputListener;
+import org.eclipse.jface.text.ITextPresentationListener;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.ITextViewerExtension2;
+import org.eclipse.jface.text.ITextViewerExtension4;
+import org.eclipse.jface.text.Position;
+import org.eclipse.jface.text.Region;
+import org.eclipse.jface.text.TextPresentation;
+import org.eclipse.jface.util.IPropertyChangeListener;
+import org.eclipse.jface.util.PropertyChangeEvent;
+
+
+/**
+ * The default hyperlink presenter underlines the
+ * link and colors the line and the text with
+ * the given color.
+ * <p>
+ * It can only be used together with the {@link HyperlinkManager#FIRST}
+ * or the {@link HyperlinkManager#LONGEST_REGION_FIRST} hyperlink strategy.
+ * </p>
+ *
+ * @since 3.1
+ */
+public class DefaultHyperlinkPresenter : IHyperlinkPresenter, IHyperlinkPresenterExtension, ITextPresentationListener, ITextInputListener, IDocumentListener, IPropertyChangeListener {
+
+    /**
+     * A named preference that holds the color used for hyperlinks.
+     * <p>
+     * Value is of type <code>String</code>. A RGB color value encoded as a string
+     * using class <code>PreferenceConverter</code>
+     * </p>
+     *
+     * @see org.eclipse.jface.resource.StringConverter
+     * @see org.eclipse.jface.preference.PreferenceConverter
+     */
+    public const static String HYPERLINK_COLOR= "hyperlinkColor"; //$NON-NLS-1$
+
+
+    /** The text viewer. */
+    private ITextViewer fTextViewer;
+    /** The hand cursor. */
+    private Cursor fCursor;
+    /** The link color. */
+    private Color fColor;
+    /** The link color specification. May be <code>null</code>. */
+    private RGB fRGB;
+    /** Tells whether to dispose the color on uninstall. */
+    private bool fDisposeColor;
+    /** The currently active region. */
+    private IRegion fActiveRegion;
+    /** The currently active style range as position. */
+    private Position fRememberedPosition;
+    /** The optional preference store. May be <code>null</code>. */
+    private IPreferenceStore fPreferenceStore;
+
+
+    /**
+     * Creates a new default hyperlink presenter which uses
+     * {@link #HYPERLINK_COLOR} to read the color from the given preference store.
+     *
+     * @param store the preference store
+     */
+    public this(IPreferenceStore store) {
+        fPreferenceStore= store;
+        fDisposeColor= true;
+    }
+
+    /**
+     * Creates a new default hyperlink presenter.
+     *
+     * @param color the hyperlink color, to be disposed by the caller
+     */
+    public this(Color color) {
+        fDisposeColor= false;
+        fColor= color;
+    }
+
+    /**
+     * Creates a new default hyperlink presenter.
+     *
+     * @param color the hyperlink color
+     */
+    public this(RGB color) {
+        fRGB= color;
+        fDisposeColor= true;
+    }
+
+    /*
+     * @see org.eclipse.jdt.internal.ui.javaeditor.IHyperlinkControl#canShowMultipleHyperlinks()
+     */
+    public bool canShowMultipleHyperlinks() {
+        return false;
+    }
+
+    /*
+     * @see org.eclipse.jdt.internal.ui.javaeditor.IHyperlinkControl#activate(org.eclipse.jdt.internal.ui.javaeditor.IHyperlink[])
+     */
+    public void showHyperlinks(IHyperlink[] hyperlinks) {
+        Assert.isLegal(hyperlinks !is null && hyperlinks.length is 1);
+        highlightRegion(hyperlinks[0].getHyperlinkRegion());
+        activateCursor();
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * @since 3.4
+     */
+    public bool canHideHyperlinks() {
+        return true;
+    }
+
+    /*
+     * @see org.eclipse.jdt.internal.ui.javaeditor.IHyperlinkControl#deactivate()
+     */
+    public void hideHyperlinks() {
+        repairRepresentation();
+        fRememberedPosition= null;
+    }
+
+    /*
+     * @see org.eclipse.jdt.internal.ui.javaeditor.IHyperlinkControl#install(org.eclipse.jface.text.ITextViewer)
+     */
+    public void install(ITextViewer textViewer) {
+        Assert.isNotNull(cast(Object)textViewer);
+        fTextViewer= textViewer;
+        fTextViewer.addTextInputListener(this);
+        if ( cast(ITextViewerExtension4)fTextViewer )
+            (cast(ITextViewerExtension4)fTextViewer).addTextPresentationListener(this);
+
+        StyledText text= fTextViewer.getTextWidget();
+        if (text !is null && !text.isDisposed()) {
+            if (fPreferenceStore !is null)
+                fColor= createColor(fPreferenceStore, HYPERLINK_COLOR, text.getDisplay());
+            else if (fRGB !is null)
+                fColor= new Color(text.getDisplay(), fRGB);
+        }
+
+        if (fPreferenceStore !is null)
+            fPreferenceStore.addPropertyChangeListener(this);
+    }
+
+    /*
+     * @see org.eclipse.jdt.internal.ui.javaeditor.IHyperlinkControl#uninstall()
+     */
+    public void uninstall() {
+        fTextViewer.removeTextInputListener(this);
+        IDocument document= fTextViewer.getDocument();
+        if (document !is null)
+            document.removeDocumentListener(this);
+
+        if (fColor !is null) {
+            if (fDisposeColor)
+                fColor.dispose();
+            fColor= null;
+        }
+
+        if (fCursor !is null) {
+            fCursor.dispose();
+            fCursor= null;
+        }
+
+        if ( cast(ITextViewerExtension4)fTextViewer )
+            (cast(ITextViewerExtension4)fTextViewer).removeTextPresentationListener(this);
+        fTextViewer= null;
+
+        if (fPreferenceStore !is null)
+            fPreferenceStore.removePropertyChangeListener(this);
+    }
+
+    public void setColor(Color color) {
+        Assert.isNotNull(cast(Object)fTextViewer);
+        fColor= color;
+    }
+
+    /*
+     * @see org.eclipse.jface.text.ITextPresentationListener#applyTextPresentation(org.eclipse.jface.text.TextPresentation)
+     */
+    public void applyTextPresentation(TextPresentation textPresentation) {
+        if (fActiveRegion is null)
+            return;
+        IRegion region= textPresentation.getExtent();
+        if (fActiveRegion.getOffset() + fActiveRegion.getLength() >= region.getOffset() && region.getOffset() + region.getLength() > fActiveRegion.getOffset()) {
+            StyleRange styleRange= new StyleRange(fActiveRegion.getOffset(), fActiveRegion.getLength(), fColor, null);
+            styleRange.underline= true;
+            textPresentation.mergeStyleRange(styleRange);
+        }
+    }
+
+    private void highlightRegion(IRegion region) {
+
+        if ((cast(Object)region).opEquals(cast(Object)fActiveRegion))
+            return;
+
+        repairRepresentation();
+
+        StyledText text= fTextViewer.getTextWidget();
+        if (text is null || text.isDisposed())
+            return;
+
+        // Invalidate region is> apply text presentation
+        fActiveRegion= region;
+        if ( cast(ITextViewerExtension2)fTextViewer )
+            (cast(ITextViewerExtension2)fTextViewer).invalidateTextPresentation(region.getOffset(), region.getLength());
+        else
+            fTextViewer.invalidateTextPresentation();
+    }
+
+    private void activateCursor() {
+        StyledText text= fTextViewer.getTextWidget();
+        if (text is null || text.isDisposed())
+            return;
+        Display display= text.getDisplay();
+        if (fCursor is null)
+            fCursor= new Cursor(display, SWT.CURSOR_HAND);
+        text.setCursor(fCursor);
+    }
+
+    private void resetCursor() {
+        StyledText text= fTextViewer.getTextWidget();
+        if (text !is null && !text.isDisposed())
+            text.setCursor(null);
+
+        if (fCursor !is null) {
+            fCursor.dispose();
+            fCursor= null;
+        }
+    }
+
+    private void repairRepresentation() {
+
+        if (fActiveRegion is null)
+            return;
+
+        int offset= fActiveRegion.getOffset();
+        int length= fActiveRegion.getLength();
+        fActiveRegion= null;
+
+        resetCursor();
+
+        // Invalidate is> remove applied text presentation
+        if ( cast(ITextViewerExtension2)fTextViewer )
+            (cast(ITextViewerExtension2) fTextViewer).invalidateTextPresentation(offset, length);
+        else
+            fTextViewer.invalidateTextPresentation();
+
+    }
+
+    /*
+     * @see org.eclipse.jface.text.IDocumentListener#documentAboutToBeChanged(org.eclipse.jface.text.DocumentEvent)
+     */
+    public void documentAboutToBeChanged(DocumentEvent event) {
+        if (fActiveRegion !is null) {
+            fRememberedPosition= new Position(fActiveRegion.getOffset(), fActiveRegion.getLength());
+            try {
+                event.getDocument().addPosition(fRememberedPosition);
+            } catch (BadLocationException x) {
+                fRememberedPosition= null;
+            }
+        }
+    }
+
+    /*
+     * @see org.eclipse.jface.text.IDocumentListener#documentChanged(org.eclipse.jface.text.DocumentEvent)
+     */
+    public void documentChanged(DocumentEvent event) {
+        if (fRememberedPosition !is null) {
+            if (!fRememberedPosition.isDeleted()) {
+                event.getDocument().removePosition(fRememberedPosition);
+                fActiveRegion= new Region(fRememberedPosition.getOffset(), fRememberedPosition.getLength());
+            } else {
+                fActiveRegion= new Region(event.getOffset(), event.getLength());
+            }
+            fRememberedPosition= null;
+
+            StyledText widget= fTextViewer.getTextWidget();
+            if (widget !is null && !widget.isDisposed()) {
+                widget.getDisplay().asyncExec(new class()  Runnable {
+                    public void run() {
+                        hideHyperlinks();
+                    }
+                });
+            }
+        }
+    }
+
+    /*
+     * @see org.eclipse.jface.text.ITextInputListener#inputDocumentAboutToBeChanged(org.eclipse.jface.text.IDocument, org.eclipse.jface.text.IDocument)
+     */
+    public void inputDocumentAboutToBeChanged(IDocument oldInput, IDocument newInput) {
+        if (oldInput is null)
+            return;
+        hideHyperlinks();
+        oldInput.removeDocumentListener(this);
+    }
+
+    /*
+     * @see org.eclipse.jface.text.ITextInputListener#inputDocumentChanged(org.eclipse.jface.text.IDocument, org.eclipse.jface.text.IDocument)
+     */
+    public void inputDocumentChanged(IDocument oldInput, IDocument newInput) {
+        if (newInput is null)
+            return;
+        newInput.addDocumentListener(this);
+    }
+
+    /**
+     * Creates a color from the information stored in the given preference store.
+     *
+     * @param store the preference store
+     * @param key the key
+     * @param display the display
+     * @return the color or <code>null</code> if there is no such information available
+     */
+    private Color createColor(IPreferenceStore store, String key, Display display) {
+
+        RGB rgb= null;
+
+        if (store.contains(key)) {
+
+            if (store.isDefault(key))
+                rgb= PreferenceConverter.getDefaultColor(store, key);
+            else
+                rgb= PreferenceConverter.getColor(store, key);
+
+            if (rgb !is null)
+                return new Color(display, rgb);
+        }
+
+        return null;
+    }
+
+    /*
+     * @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
+     */
+    public void propertyChange(PropertyChangeEvent event) {
+        if (!HYPERLINK_COLOR.equals(event.getProperty()))
+            return;
+
+        if (fDisposeColor && fColor !is null && !fColor.isDisposed())
+            fColor.dispose();
+        fColor= null;
+
+        StyledText textWidget= fTextViewer.getTextWidget();
+        if (textWidget !is null && !textWidget.isDisposed())
+            fColor= createColor(fPreferenceStore, HYPERLINK_COLOR, textWidget.getDisplay());
+    }
+}