--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface.text/src/org/eclipse/jface/text/source/MatchingCharacterPainter.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,342 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 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.source.MatchingCharacterPainter;
+
+import org.eclipse.jface.text.source.ISharedTextColors; // packageimport
+import org.eclipse.jface.text.source.ILineRange; // packageimport
+import org.eclipse.jface.text.source.IAnnotationPresentation; // packageimport
+import org.eclipse.jface.text.source.IVerticalRulerInfoExtension; // packageimport
+import org.eclipse.jface.text.source.ICharacterPairMatcher; // packageimport
+import org.eclipse.jface.text.source.TextInvocationContext; // packageimport
+import org.eclipse.jface.text.source.LineChangeHover; // packageimport
+import org.eclipse.jface.text.source.IChangeRulerColumn; // packageimport
+import org.eclipse.jface.text.source.IAnnotationMap; // packageimport
+import org.eclipse.jface.text.source.IAnnotationModelListenerExtension; // packageimport
+import org.eclipse.jface.text.source.ISourceViewerExtension2; // packageimport
+import org.eclipse.jface.text.source.IAnnotationHover; // packageimport
+import org.eclipse.jface.text.source.ContentAssistantFacade; // packageimport
+import org.eclipse.jface.text.source.IAnnotationAccess; // packageimport
+import org.eclipse.jface.text.source.IVerticalRulerExtension; // packageimport
+import org.eclipse.jface.text.source.IVerticalRulerColumn; // packageimport
+import org.eclipse.jface.text.source.LineNumberRulerColumn; // packageimport
+import org.eclipse.jface.text.source.IAnnotationModelExtension; // packageimport
+import org.eclipse.jface.text.source.ILineDifferExtension; // packageimport
+import org.eclipse.jface.text.source.DefaultCharacterPairMatcher; // packageimport
+import org.eclipse.jface.text.source.LineNumberChangeRulerColumn; // packageimport
+import org.eclipse.jface.text.source.IAnnotationAccessExtension; // packageimport
+import org.eclipse.jface.text.source.ISourceViewer; // packageimport
+import org.eclipse.jface.text.source.AnnotationModel; // packageimport
+import org.eclipse.jface.text.source.ILineDifferExtension2; // packageimport
+import org.eclipse.jface.text.source.IAnnotationModelListener; // packageimport
+import org.eclipse.jface.text.source.IVerticalRuler; // packageimport
+import org.eclipse.jface.text.source.DefaultAnnotationHover; // packageimport
+import org.eclipse.jface.text.source.SourceViewer; // packageimport
+import org.eclipse.jface.text.source.SourceViewerConfiguration; // packageimport
+import org.eclipse.jface.text.source.AnnotationBarHoverManager; // packageimport
+import org.eclipse.jface.text.source.CompositeRuler; // packageimport
+import org.eclipse.jface.text.source.ImageUtilities; // packageimport
+import org.eclipse.jface.text.source.VisualAnnotationModel; // packageimport
+import org.eclipse.jface.text.source.IAnnotationModel; // packageimport
+import org.eclipse.jface.text.source.ISourceViewerExtension3; // packageimport
+import org.eclipse.jface.text.source.ILineDiffInfo; // packageimport
+import org.eclipse.jface.text.source.VerticalRulerEvent; // packageimport
+import org.eclipse.jface.text.source.ChangeRulerColumn; // packageimport
+import org.eclipse.jface.text.source.ILineDiffer; // packageimport
+import org.eclipse.jface.text.source.AnnotationModelEvent; // packageimport
+import org.eclipse.jface.text.source.AnnotationColumn; // packageimport
+import org.eclipse.jface.text.source.AnnotationRulerColumn; // packageimport
+import org.eclipse.jface.text.source.IAnnotationHoverExtension; // packageimport
+import org.eclipse.jface.text.source.AbstractRulerColumn; // packageimport
+import org.eclipse.jface.text.source.ISourceViewerExtension; // packageimport
+import org.eclipse.jface.text.source.AnnotationMap; // packageimport
+import org.eclipse.jface.text.source.IVerticalRulerInfo; // packageimport
+import org.eclipse.jface.text.source.IAnnotationModelExtension2; // packageimport
+import org.eclipse.jface.text.source.LineRange; // packageimport
+import org.eclipse.jface.text.source.IAnnotationAccessExtension2; // packageimport
+import org.eclipse.jface.text.source.VerticalRuler; // packageimport
+import org.eclipse.jface.text.source.JFaceTextMessages; // packageimport
+import org.eclipse.jface.text.source.IOverviewRuler; // packageimport
+import org.eclipse.jface.text.source.Annotation; // packageimport
+import org.eclipse.jface.text.source.IVerticalRulerListener; // packageimport
+import org.eclipse.jface.text.source.ISourceViewerExtension4; // packageimport
+import org.eclipse.jface.text.source.AnnotationPainter; // packageimport
+import org.eclipse.jface.text.source.IAnnotationHoverExtension2; // packageimport
+import org.eclipse.jface.text.source.OverviewRuler; // packageimport
+import org.eclipse.jface.text.source.OverviewRulerHoverManager; // packageimport
+
+
+import java.lang.all;
+import java.util.Set;
+
+
+
+
+import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.events.PaintEvent;
+import org.eclipse.swt.events.PaintListener;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IPaintPositionManager;
+import org.eclipse.jface.text.IPainter;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextViewerExtension5;
+import org.eclipse.jface.text.Position;
+import org.eclipse.jface.text.Region;
+
+/**
+ * Highlights the peer character matching the character near the caret position.
+ * This painter can be configured with an
+ * {@link org.eclipse.jface.text.source.ICharacterPairMatcher}.
+ * <p>
+ * Clients instantiate and configure object of this class.</p>
+ *
+ * @since 2.1
+ */
+public final class MatchingCharacterPainter : IPainter, PaintListener {
+
+    /** Indicates whether this painter is active */
+    private bool fIsActive= false;
+    /** The source viewer this painter is associated with */
+    private ISourceViewer fSourceViewer;
+    /** The viewer's widget */
+    private StyledText fTextWidget;
+    /** The color in which to highlight the peer character */
+    private Color fColor;
+    /** The paint position manager */
+    private IPaintPositionManager fPaintPositionManager;
+    /** The strategy for finding matching characters */
+    private ICharacterPairMatcher fMatcher;
+    /** The position tracking the matching characters */
+    private Position fPairPosition;
+    /** The anchor indicating whether the character is left or right of the caret */
+    private int fAnchor;
+
+
+    /**
+     * Creates a new MatchingCharacterPainter for the given source viewer using
+     * the given character pair matcher. The character matcher is not adopted by
+     * this painter. Thus,  it is not disposed. However, this painter requires
+     * exclusive access to the given pair matcher.
+     *
+     * @param sourceViewer
+     * @param matcher
+     */
+    public this(ISourceViewer sourceViewer, ICharacterPairMatcher matcher) {
+        fPairPosition= new Position(0, 0);
+        fSourceViewer= sourceViewer;
+        fMatcher= matcher;
+        fTextWidget= sourceViewer.getTextWidget();
+    }
+
+    /**
+     * Sets the color in which to highlight the match character.
+     *
+     * @param color the color
+     */
+    public void setColor(Color color) {
+        fColor= color;
+    }
+
+    /*
+     * @see org.eclipse.jface.text.IPainter#dispose()
+     */
+    public void dispose() {
+        if (fMatcher !is null) {
+            fMatcher.clear();
+            fMatcher= null;
+        }
+
+        fColor= null;
+        fTextWidget= null;
+    }
+
+    /*
+     * @see org.eclipse.jface.text.IPainter#deactivate(bool)
+     */
+    public void deactivate(bool redraw) {
+        if (fIsActive) {
+            fIsActive= false;
+            fTextWidget.removePaintListener(this);
+            if (fPaintPositionManager !is null)
+                fPaintPositionManager.unmanagePosition(fPairPosition);
+            if (redraw)
+                handleDrawRequest(null);
+        }
+    }
+
+    /*
+     * @see org.eclipse.swt.events.PaintListener#paintControl(org.eclipse.swt.events.PaintEvent)
+     */
+    public void paintControl(PaintEvent event) {
+        if (fTextWidget !is null)
+            handleDrawRequest(event.gc);
+    }
+
+    /**
+     * Handles a redraw request.
+     *
+     * @param gc the GC to draw into.
+     */
+    private void handleDrawRequest(GC gc) {
+
+        if (fPairPosition.isDeleted)
+            return;
+
+        int offset= fPairPosition.getOffset();
+        int length= fPairPosition.getLength();
+        if (length < 1)
+            return;
+
+        if ( cast(ITextViewerExtension5)fSourceViewer ) {
+            ITextViewerExtension5 extension= cast(ITextViewerExtension5) fSourceViewer;
+            IRegion widgetRange= extension.modelRange2WidgetRange(new Region(offset, length));
+            if (widgetRange is null)
+                return;
+
+            try {
+                // don't draw if the pair position is really hidden and widgetRange just
+                // marks the coverage around it.
+                IDocument doc= fSourceViewer.getDocument();
+                int startLine= doc.getLineOfOffset(offset);
+                int endLine= doc.getLineOfOffset(offset + length);
+                if (extension.modelLine2WidgetLine(startLine) is -1 || extension.modelLine2WidgetLine(endLine) is -1)
+                    return;
+            } catch (BadLocationException e) {
+                return;
+            }
+
+            offset= widgetRange.getOffset();
+            length= widgetRange.getLength();
+
+        } else {
+            IRegion region= fSourceViewer.getVisibleRegion();
+            if (region.getOffset() > offset || region.getOffset() + region.getLength() < offset + length)
+                return;
+            offset -= region.getOffset();
+        }
+
+        if (ICharacterPairMatcher.RIGHT is fAnchor)
+            draw(gc, offset, 1);
+        else
+            draw(gc, offset + length -1, 1);
+    }
+
+    /**
+     * Highlights the given widget region.
+     *
+     * @param gc the GC to draw into
+     * @param offset the offset of the widget region
+     * @param length the length of the widget region
+     */
+    private void draw(GC gc, int offset, int length) {
+        if (gc !is null) {
+
+            gc.setForeground(fColor);
+
+            Rectangle bounds;
+            if (length > 0)
+                bounds= fTextWidget.getTextBounds(offset, offset + length - 1);
+            else {
+                Point loc= fTextWidget.getLocationAtOffset(offset);
+                bounds= new Rectangle(loc.x, loc.y, 1, fTextWidget.getLineHeight(offset));
+            }
+
+            // draw box around line segment
+            gc.drawRectangle(bounds.x, bounds.y, bounds.width - 1, bounds.height - 1);
+
+            // draw box around character area
+//          int widgetBaseline= fTextWidget.getBaseline();
+//          FontMetrics fm= gc.getFontMetrics();
+//          int fontBaseline= fm.getAscent() + fm.getLeading();
+//          int fontBias= widgetBaseline - fontBaseline;
+
+//          gc.drawRectangle(left.x, left.y + fontBias, right.x - left.x - 1, fm.getHeight() - 1);
+
+        } else {
+            fTextWidget.redrawRange(offset, length, true);
+        }
+    }
+
+    /*
+     * @see org.eclipse.jface.text.IPainter#paint(int)
+     */
+    public void paint(int reason) {
+
+        IDocument document= fSourceViewer.getDocument();
+        if (document is null) {
+            deactivate(false);
+            return;
+        }
+
+        Point selection= fSourceViewer.getSelectedRange();
+        if (selection.y > 0) {
+            deactivate(true);
+            return;
+        }
+
+        IRegion pair= fMatcher.match(document, selection.x);
+        if (pair is null) {
+            deactivate(true);
+            return;
+        }
+
+        if (fIsActive) {
+
+            if (IPainter.CONFIGURATION is reason) {
+
+                // redraw current highlighting
+                handleDrawRequest(null);
+
+            } else if (pair.getOffset() !is fPairPosition.getOffset() ||
+                    pair.getLength() !is fPairPosition.getLength() ||
+                    fMatcher.getAnchor() !is fAnchor) {
+
+                // otherwise only do something if position is different
+
+                // remove old highlighting
+                handleDrawRequest(null);
+                // update position
+                fPairPosition.isDeleted_= false;
+                fPairPosition.offset= pair.getOffset();
+                fPairPosition.length= pair.getLength();
+                fAnchor= fMatcher.getAnchor();
+                // apply new highlighting
+                handleDrawRequest(null);
+
+            }
+        } else {
+
+            fIsActive= true;
+
+            fPairPosition.isDeleted_= false;
+            fPairPosition.offset= pair.getOffset();
+            fPairPosition.length= pair.getLength();
+            fAnchor= fMatcher.getAnchor();
+
+            fTextWidget.addPaintListener(this);
+            fPaintPositionManager.managePosition(fPairPosition);
+            handleDrawRequest(null);
+        }
+    }
+
+    /*
+     * @see org.eclipse.jface.text.IPainter#setPositionManager(org.eclipse.jface.text.IPaintPositionManager)
+     */
+    public void setPositionManager(IPaintPositionManager manager) {
+        fPaintPositionManager= manager;
+    }
+}