X-Git-Url: http://secure.phpeclipse.com

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/BracketPainter.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/BracketPainter.java
new file mode 100644
index 0000000..55eea03
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/BracketPainter.java
@@ -0,0 +1,171 @@
+package net.sourceforge.phpeclipse.phpeditor;
+
+/*
+ * (c) Copyright IBM Corp. 2000, 2001.
+ * All Rights Reserved.
+ */
+
+import net.sourceforge.phpdt.internal.ui.text.PHPPairMatcher;
+
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextViewerExtension3;
+import org.eclipse.jface.text.Position;
+import org.eclipse.jface.text.Region;
+import org.eclipse.jface.text.source.ISourceViewer;
+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;
+
+
+public final class BracketPainter implements IPainter, PaintListener {
+			
+	private PHPPairMatcher fMatcher= new PHPPairMatcher(new char[] { '{', '}', '(', ')', '[', ']' });
+	private Position fBracketPosition= new Position(0, 0);
+	private int fAnchor;
+	
+	private boolean fIsActive= false;
+	private ISourceViewer fSourceViewer;
+	private StyledText fTextWidget;
+	private Color fColor;
+	
+	private IPositionManager fPositionManager;
+	
+	
+	public BracketPainter(ISourceViewer sourceViewer) {
+		fSourceViewer= sourceViewer;
+		fTextWidget= sourceViewer.getTextWidget();
+	}
+	
+	public void setHighlightColor(Color color) {
+		fColor= color;
+	}
+				
+	public void dispose() {
+		if (fMatcher != null) {
+			fMatcher.dispose();
+			fMatcher= null;
+		}
+		
+		fColor= null;
+		fTextWidget= null;
+	}
+				
+	public void deactivate(boolean redraw) {
+		if (fIsActive) {
+			fIsActive= false;
+			fTextWidget.removePaintListener(this);
+			if (fPositionManager != null)
+				fPositionManager.removeManagedPosition(fBracketPosition);
+			if (redraw)
+				handleDrawRequest(null);
+		}
+	}
+		
+	public void paintControl(PaintEvent event) {
+		if (fTextWidget != null)
+			handleDrawRequest(event.gc);
+	}
+	
+	private void handleDrawRequest(GC gc) {
+		
+		if (fBracketPosition.isDeleted)
+			return;
+			
+		int offset= fBracketPosition.getOffset();
+		int length= fBracketPosition.getLength();
+		if (length < 1)
+			return;
+			
+		if (fSourceViewer instanceof ITextViewerExtension3) {
+			ITextViewerExtension3 extension= (ITextViewerExtension3) fSourceViewer;
+			IRegion widgetRange= extension.modelRange2WidgetRange(new Region(offset, length));
+			if (widgetRange == null)
+				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 (PHPPairMatcher.RIGHT == fAnchor)
+			draw(gc, offset, 1);
+		else 
+			draw(gc, offset + length -1, 1);
+	}
+	
+	private void draw(GC gc, int offset, int length) {
+		if (gc != null) {
+			Point left= fTextWidget.getLocationAtOffset(offset);
+			Point right= fTextWidget.getLocationAtOffset(offset + length);
+			
+			gc.setForeground(fColor);
+			gc.drawRectangle(left.x, left.y, right.x - left.x - 1, gc.getFontMetrics().getHeight() - 1);
+								
+		} else {
+			fTextWidget.redrawRange(offset, length, true);
+		}
+	}
+	
+	/*
+	 * @see IPainter#paint(int)
+	 */
+	public void paint(int reason) {
+		Point selection= fSourceViewer.getSelectedRange();
+		if (selection.y > 0) {
+			deactivate(true);
+			return;
+		}
+			
+		IRegion pair= fMatcher.match(fSourceViewer.getDocument(), selection.x);
+		if (pair == null) {
+			deactivate(true);
+			return;
+		}
+		
+		if (fIsActive) {
+			// only if different
+			if (pair.getOffset() != fBracketPosition.getOffset() || 
+					pair.getLength() != fBracketPosition.getLength() || 
+					fMatcher.getAnchor() != fAnchor) {
+				
+				// remove old highlighting
+				handleDrawRequest(null);
+				// update position
+				fBracketPosition.isDeleted= false;
+				fBracketPosition.offset= pair.getOffset();
+				fBracketPosition.length= pair.getLength();
+				fAnchor= fMatcher.getAnchor();
+				// apply new highlighting
+				handleDrawRequest(null);
+			
+			}
+		} else {
+			
+			fIsActive= true;
+			
+			fBracketPosition.isDeleted= false;
+			fBracketPosition.offset= pair.getOffset();
+			fBracketPosition.length= pair.getLength();
+			fAnchor= fMatcher.getAnchor();
+			
+			fTextWidget.addPaintListener(this);
+			fPositionManager.addManagedPosition(fBracketPosition);
+			handleDrawRequest(null);
+		}
+	}
+	
+	/*
+	 * @see IPainter#setPositionManager(IPositionManager)
+	 */
+	public void setPositionManager(IPositionManager manager) {
+		fPositionManager= manager;
+	}
+}