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SVG: Add possibility to customize renderers for text chunks
DEVSIX-5428
1 parent e1a2380 commit 9a0af2f

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5 files changed

+102
-2
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5 files changed

+102
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lines changed

‎svg/src/main/java/com/itextpdf/svg/SvgConstants.java

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@@ -458,6 +458,11 @@ public static final class Tags {
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*/
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public static final String TEXT = "text";
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/**
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* Phantom tag for text leaf.
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*/
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public static final String TEXT_LEAF = ":text-leaf";
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/**
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* Tag defining a path on which text can be drawn.
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*/

‎svg/src/main/java/com/itextpdf/svg/processors/impl/DefaultSvgProcessor.java

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@@ -43,10 +43,14 @@ This file is part of the iText (R) project.
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package com.itextpdf.svg.processors.impl;
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import com.itextpdf.styledxmlparser.css.ICssResolver;
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import com.itextpdf.styledxmlparser.jsoup.nodes.Element;
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import com.itextpdf.styledxmlparser.jsoup.parser.Tag;
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import com.itextpdf.styledxmlparser.node.IElementNode;
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import com.itextpdf.styledxmlparser.node.INode;
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import com.itextpdf.styledxmlparser.node.ITextNode;
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import com.itextpdf.styledxmlparser.node.impl.jsoup.node.JsoupElementNode;
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import com.itextpdf.svg.SvgConstants;
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import com.itextpdf.svg.SvgConstants.Tags;
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import com.itextpdf.svg.css.impl.SvgStyleResolver;
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import com.itextpdf.svg.exceptions.SvgLogMessageConstant;
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import com.itextpdf.svg.exceptions.SvgProcessingException;
@@ -63,7 +67,6 @@ This file is part of the iText (R) project.
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import com.itextpdf.svg.renderers.impl.ISvgTextNodeRenderer;
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import com.itextpdf.svg.renderers.impl.LinearGradientSvgNodeRenderer;
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import com.itextpdf.svg.renderers.impl.StopSvgNodeRenderer;
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import com.itextpdf.svg.renderers.impl.TextLeafSvgNodeRenderer;
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import com.itextpdf.svg.renderers.impl.TextSvgBranchRenderer;
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import com.itextpdf.svg.utils.SvgTextUtil;
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@@ -255,7 +258,9 @@ private void processText(ITextNode textNode) {
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if (parentRenderer instanceof TextSvgBranchRenderer) {
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String wholeText = textNode.wholeText();
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if (!"".equals(wholeText) && !SvgTextUtil.isOnlyWhiteSpace(wholeText)) {
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TextLeafSvgNodeRenderer textLeaf = new TextLeafSvgNodeRenderer();
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final IElementNode textLeafElement = new JsoupElementNode(new Element(Tag.valueOf(Tags.TEXT_LEAF), ""));
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ISvgTextNodeRenderer textLeaf = (ISvgTextNodeRenderer) this.rendererFactory
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.createSvgNodeRendererForTag(textLeafElement, parentRenderer);
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textLeaf.setParent(parentRenderer);
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textLeaf.setAttribute(SvgConstants.Attributes.TEXT_CONTENT, wholeText);
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((TextSvgBranchRenderer) parentRenderer).addChild(textLeaf);

‎svg/src/main/java/com/itextpdf/svg/renderers/factories/DefaultSvgNodeRendererMapper.java

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@@ -61,6 +61,7 @@ This file is part of the iText (R) project.
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import com.itextpdf.svg.renderers.impl.StopSvgNodeRenderer;
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import com.itextpdf.svg.renderers.impl.SvgTagSvgNodeRenderer;
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import com.itextpdf.svg.renderers.impl.SymbolSvgNodeRenderer;
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import com.itextpdf.svg.renderers.impl.TextLeafSvgNodeRenderer;
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import com.itextpdf.svg.renderers.impl.TextSvgBranchRenderer;
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import com.itextpdf.svg.renderers.impl.TextSvgTSpanBranchRenderer;
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import com.itextpdf.svg.renderers.impl.UseSvgNodeRenderer;
@@ -109,6 +110,7 @@ public Map<String, Class<? extends ISvgNodeRenderer>> getMapping() {
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result.put(SvgConstants.Tags.TEXT, TextSvgBranchRenderer.class);
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result.put(SvgConstants.Tags.TSPAN, TextSvgTSpanBranchRenderer.class);
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result.put(SvgConstants.Tags.USE, UseSvgNodeRenderer.class);
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result.put(SvgConstants.Tags.TEXT_LEAF, TextLeafSvgNodeRenderer.class);
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return result;
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}

‎svg/src/test/java/com/itextpdf/svg/customization/CustomizeTextLeafSvgNodeRendererTest.java

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@@ -0,0 +1,88 @@
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package com.itextpdf.svg.customization;
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import com.itextpdf.kernel.colors.ColorConstants;
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import com.itextpdf.kernel.geom.Rectangle;
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import com.itextpdf.kernel.pdf.PdfDocument;
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import com.itextpdf.kernel.pdf.PdfWriter;
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import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
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import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
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import com.itextpdf.kernel.utils.CompareTool;
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import com.itextpdf.styledxmlparser.node.IElementNode;
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import com.itextpdf.svg.SvgConstants;
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import com.itextpdf.svg.SvgConstants.Tags;
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import com.itextpdf.svg.converter.SvgConverter;
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import com.itextpdf.svg.processors.impl.SvgConverterProperties;
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import com.itextpdf.svg.renderers.ISvgNodeRenderer;
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import com.itextpdf.svg.renderers.SvgDrawContext;
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import com.itextpdf.svg.renderers.SvgIntegrationTest;
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import com.itextpdf.svg.renderers.factories.DefaultSvgNodeRendererFactory;
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import com.itextpdf.svg.renderers.impl.TextLeafSvgNodeRenderer;
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import com.itextpdf.test.ITextTest;
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import java.io.IOException;
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import org.junit.Assert;
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import org.junit.BeforeClass;
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import org.junit.Test;
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public class CustomizeTextLeafSvgNodeRendererTest extends SvgIntegrationTest {
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public static final String SOURCE_FOLDER = "./src/test/resources/com/itextpdf/svg/customization/CustomizeTextLeafSvgNodeRendererTest/";
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public static final String DESTINATION_FOLDER = "./target/test/com/itextpdf/svg/customization/CustomizeTextLeafSvgNodeRendererTest/";
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@BeforeClass
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public static void beforeClass() {
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ITextTest.createDestinationFolder(DESTINATION_FOLDER);
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}
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@Test
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public void testCustomizeTextLeafSvgNodeRenderer() throws IOException, InterruptedException {
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String pdfFilename = "customizeTextLeafSvgNodeRenderer.pdf";
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PdfDocument doc = new PdfDocument(new PdfWriter(DESTINATION_FOLDER + pdfFilename));
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doc.addNewPage();
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SvgConverterProperties properties = new SvgConverterProperties();
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properties.setRendererFactory(new CustomTextLeafOverridingSvgNodeRendererFactory());
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String svg = "<svg viewBox=\"0 0 240 80\" xmlns=\"http://www.w3.org/2000/svg\">\n"
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+ " <text x=\"20\" y=\"35\" class=\"small\">Hello world</text>\n"
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+ "</svg>";
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PdfFormXObject form = SvgConverter.convertToXObject(svg, doc, properties);
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new PdfCanvas(doc.getPage(1)).addXObjectFittedIntoRectangle(form, new Rectangle(100, 100, 240, 80));
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doc.close();
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Assert.assertNull(new CompareTool().compareByContent(DESTINATION_FOLDER + pdfFilename, SOURCE_FOLDER + "cmp_" + pdfFilename, DESTINATION_FOLDER, "diff_"));
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}
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private static class CustomTextLeafOverridingSvgNodeRendererFactory extends DefaultSvgNodeRendererFactory {
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@Override
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public ISvgNodeRenderer createSvgNodeRendererForTag(IElementNode tag, ISvgNodeRenderer parent) {
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if (Tags.TEXT_LEAF.equals(tag.name())) {
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return new CustomTextLeafSvgNodeRenderer();
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} else {
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return super.createSvgNodeRendererForTag(tag, parent);
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}
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}
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}
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private static class CustomTextLeafSvgNodeRenderer extends TextLeafSvgNodeRenderer {
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@Override
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public ISvgNodeRenderer createDeepCopy() {
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CustomTextLeafSvgNodeRenderer copy = new CustomTextLeafSvgNodeRenderer();
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deepCopyAttributesAndStyles(copy);
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return copy;
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}
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@Override
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protected void doDraw(SvgDrawContext context) {
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if (this.attributesAndStyles != null && this.attributesAndStyles.containsKey(SvgConstants.Attributes.TEXT_CONTENT)) {
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PdfCanvas currentCanvas = context.getCurrentCanvas();
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currentCanvas.setFillColor(ColorConstants.RED);
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currentCanvas.moveText(context.getTextMove()[0], context.getTextMove()[1]);
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String initialText = this.attributesAndStyles.get(SvgConstants.Attributes.TEXT_CONTENT);
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String amendedText = "_" + initialText + "_";
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currentCanvas.showText(amendedText);
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}
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}
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}
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}

‎svg/src/test/resources/com/itextpdf/svg/customization/CustomizeTextLeafSvgNodeRendererTest/cmp_customizeTextLeafSvgNodeRenderer.pdf

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