| /* |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| */ |
| package org.apache.batik.bridge; |
| |
| import java.awt.RenderingHints; |
| |
| import org.apache.batik.css.engine.CSSEngineEvent; |
| import org.apache.batik.css.engine.SVGCSSEngine; |
| import org.apache.batik.gvt.GraphicsNode; |
| import org.apache.batik.gvt.ShapeNode; |
| import org.apache.batik.gvt.ShapePainter; |
| import org.w3c.dom.Element; |
| |
| /** |
| * The base bridge class for shapes. Subclasses bridge <code>ShapeNode</code>. |
| * |
| * @author <a href="mailto:tkormann@apache.org">Thierry Kormann</a> |
| * @version $Id$ |
| */ |
| public abstract class SVGShapeElementBridge extends AbstractGraphicsNodeBridge { |
| |
| /** |
| * Constructs a new bridge for SVG shapes. |
| */ |
| protected SVGShapeElementBridge() {} |
| |
| /** |
| * Creates a graphics node using the specified BridgeContext and |
| * for the specified element. |
| * |
| * @param ctx the bridge context to use |
| * @param e the element that describes the graphics node to build |
| * @return a graphics node that represents the specified element |
| */ |
| public GraphicsNode createGraphicsNode(BridgeContext ctx, Element e) { |
| ShapeNode shapeNode = (ShapeNode)super.createGraphicsNode(ctx, e); |
| if (shapeNode == null) { |
| return null; |
| } |
| |
| associateSVGContext(ctx, e, shapeNode); |
| |
| // delegates to subclasses the shape construction |
| buildShape(ctx, e, shapeNode); |
| |
| // 'shape-rendering' and 'color-rendering' |
| RenderingHints hints = null; |
| hints = CSSUtilities.convertColorRendering(e, hints); |
| hints = CSSUtilities.convertShapeRendering(e, hints); |
| if (hints != null) |
| shapeNode.setRenderingHints(hints); |
| |
| return shapeNode; |
| } |
| |
| /** |
| * Creates a <code>ShapeNode</code>. |
| */ |
| protected GraphicsNode instantiateGraphicsNode() { |
| return new ShapeNode(); |
| } |
| |
| /** |
| * Builds using the specified BridgeContext and element, the |
| * specified graphics node. |
| * |
| * @param ctx the bridge context to use |
| * @param e the element that describes the graphics node to build |
| * @param node the graphics node to build |
| */ |
| public void buildGraphicsNode(BridgeContext ctx, |
| Element e, |
| GraphicsNode node) { |
| ShapeNode shapeNode = (ShapeNode)node; |
| shapeNode.setShapePainter(createShapePainter(ctx, e, shapeNode)); |
| super.buildGraphicsNode(ctx, e, node); |
| } |
| |
| /** |
| * Creates the shape painter associated to the specified element. |
| * This implementation creates a shape painter considering the |
| * various fill and stroke properties. |
| * |
| * @param ctx the bridge context to use |
| * @param e the element that describes the shape painter to use |
| * @param shapeNode the shape node that is interested in its shape painter |
| */ |
| protected ShapePainter createShapePainter(BridgeContext ctx, |
| Element e, |
| ShapeNode shapeNode) { |
| // 'fill' |
| // 'fill-opacity' |
| // 'stroke' |
| // 'stroke-opacity', |
| // 'stroke-width' |
| // 'stroke-linecap' |
| // 'stroke-linejoin' |
| // 'stroke-miterlimit' |
| // 'stroke-dasharray' |
| // 'stroke-dashoffset' |
| return PaintServer.convertFillAndStroke(e, shapeNode, ctx); |
| } |
| |
| /** |
| * Initializes the specified ShapeNode's shape defined by the |
| * specified Element and using the specified bridge context. |
| * |
| * @param ctx the bridge context to use |
| * @param e the element that describes the shape node to build |
| * @param node the shape node to initialize |
| */ |
| protected abstract void buildShape(BridgeContext ctx, |
| Element e, |
| ShapeNode node); |
| |
| /** |
| * Returns false as shapes are not a container. |
| */ |
| public boolean isComposite() { |
| return false; |
| } |
| |
| // BridgeUpdateHandler implementation ////////////////////////////////// |
| |
| /** |
| * Invoked when the geometry of an graphical element has changed. |
| */ |
| protected void handleGeometryChanged() { |
| super.handleGeometryChanged(); |
| ShapeNode shapeNode = (ShapeNode)node; |
| shapeNode.setShapePainter(createShapePainter(ctx, e, shapeNode)); |
| } |
| |
| /** |
| * This flag bit indicates if a new shape painter has already been created. |
| * Avoid creating one ShapePainter per CSS property change |
| */ |
| protected boolean hasNewShapePainter; |
| |
| /** |
| * Invoked when CSS properties have changed on an element. |
| * |
| * @param evt the CSSEngine event that describes the update |
| */ |
| public void handleCSSEngineEvent(CSSEngineEvent evt) { |
| hasNewShapePainter = false; |
| super.handleCSSEngineEvent(evt); |
| } |
| |
| /** |
| * Invoked for each CSS property that has changed. |
| */ |
| protected void handleCSSPropertyChanged(int property) { |
| switch(property) { |
| case SVGCSSEngine.FILL_INDEX: |
| case SVGCSSEngine.FILL_OPACITY_INDEX: |
| case SVGCSSEngine.STROKE_INDEX: |
| case SVGCSSEngine.STROKE_OPACITY_INDEX: |
| // Opportunity to just 'update' the existing shape painters... |
| case SVGCSSEngine.STROKE_WIDTH_INDEX: |
| case SVGCSSEngine.STROKE_LINECAP_INDEX: |
| case SVGCSSEngine.STROKE_LINEJOIN_INDEX: |
| case SVGCSSEngine.STROKE_MITERLIMIT_INDEX: |
| case SVGCSSEngine.STROKE_DASHARRAY_INDEX: |
| case SVGCSSEngine.STROKE_DASHOFFSET_INDEX: { |
| if (!hasNewShapePainter) { |
| hasNewShapePainter = true; |
| ShapeNode shapeNode = (ShapeNode)node; |
| shapeNode.setShapePainter(createShapePainter(ctx, e, shapeNode)); |
| } |
| break; |
| } |
| case SVGCSSEngine.SHAPE_RENDERING_INDEX: { |
| RenderingHints hints = node.getRenderingHints(); |
| hints = CSSUtilities.convertShapeRendering(e, hints); |
| if (hints != null) { |
| node.setRenderingHints(hints); |
| } |
| break; |
| } |
| case SVGCSSEngine.COLOR_RENDERING_INDEX: { |
| RenderingHints hints = node.getRenderingHints(); |
| hints = CSSUtilities.convertColorRendering(e, hints); |
| if (hints != null) { |
| node.setRenderingHints(hints); |
| } |
| break; |
| } |
| default: |
| super.handleCSSPropertyChanged(property); |
| } |
| } |
| } |