Restrict nbsp only splitting

DEVSIX-5262

Author: ars18wrw

layout/src/main/java/com/itextpdf/layout/renderer/LineRenderer.java

@@ -530,6 +530,9 @@ && hasChildRendererInHtmlMode()) {
 
                         childPos = lastFittingChildRendererData.childIndex;
                         childResult = lastFittingChildRendererData.childLayoutResult;
+                        if (0 == childPos && LayoutResult.NOTHING == childResult.getStatus()) {
+                            anythingPlaced = false;
+                        }
                         textRendererLayoutResults.put(childPos, childResult);
 
                         MinMaxWidth textSequenceElemminMaxWidth = ((MinMaxWidthLayoutResult) childResult).getMinMaxWidth();

layout/src/test/java/com/itextpdf/layout/renderer/TextRendererIntegrationTest.java

@@ -29,6 +29,7 @@ This file is part of the iText (R) project.
 import com.itextpdf.kernel.colors.ColorConstants;
 import com.itextpdf.kernel.font.PdfFont;
 import com.itextpdf.kernel.font.PdfFontFactory;
+import com.itextpdf.kernel.geom.PageSize;
 import com.itextpdf.kernel.geom.Rectangle;
 import com.itextpdf.kernel.pdf.PdfDocument;
 import com.itextpdf.kernel.pdf.PdfWriter;
@@ -774,6 +775,94 @@ public IRenderer getNextRenderer() {
         Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder));
     }
 
+    @Test
+    public void nbspCannotBeFitAndIsTheOnlySymbolTest() throws IOException, InterruptedException {
+        String outFileName = destinationFolder + "nbspCannotBeFitAndIsTheOnlySymbolTest.pdf";
+        String cmpFileName = sourceFolder + "cmp_nbspCannotBeFitAndIsTheOnlySymbolTest.pdf";
+
+        PdfDocument pdfDocument = new PdfDocument(new PdfWriter(outFileName));
+        // No place for any symbol (page width is fully occupied by margins)
+        Document doc = new Document(pdfDocument, new PageSize(72, 1000));
+
+        Paragraph paragraph = new Paragraph()
+                .add(new Text("\u00A0"));
+
+        paragraph.setProperty(Property.RENDERING_MODE, RenderingMode.HTML_MODE);
+        doc.add(paragraph);
+
+        doc.close();
+
+        Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder));
+    }
+
+    @Test
+    @LogMessages(messages = {
+            @LogMessage(messageTemplate = LogMessageConstant.ELEMENT_DOES_NOT_FIT_AREA)
+    })
+    public void nbspCannotBeFitAndMakesTheFirstChunkTest() throws IOException, InterruptedException {
+        String outFileName = destinationFolder + "nbspCannotBeFitAndMakesTheFirstChunkTest.pdf";
+        String cmpFileName = sourceFolder + "cmp_nbspCannotBeFitAndMakesTheFirstChunkTest.pdf";
+
+        PdfDocument pdfDocument = new PdfDocument(new PdfWriter(outFileName));
+        // No place for any symbol (page width is fully occupied by margins)
+        Document doc = new Document(pdfDocument, new PageSize(72, 1000));
+
+        Paragraph paragraph = new Paragraph()
+                .add(new Text("\u00A0"))
+                .add(new Text("SecondChunk"));
+
+        paragraph.setProperty(Property.RENDERING_MODE, RenderingMode.HTML_MODE);
+        doc.add(paragraph);
+
+        doc.close();
+
+        Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder));
+    }
+
+    @Test
+    @LogMessages(messages = {
+            @LogMessage(messageTemplate = LogMessageConstant.ELEMENT_DOES_NOT_FIT_AREA)
+    })
+    public void nbspCannotBeFitAndIsTheFirstSymbolOfChunkTest() throws IOException, InterruptedException {
+        String outFileName = destinationFolder + "nbspCannotBeFitAndIsTheFirstSymbolOfChunkTest.pdf";
+        String cmpFileName = sourceFolder + "cmp_nbspCannotBeFitAndIsTheFirstSymbolOfChunkTest.pdf";
+
+        PdfDocument pdfDocument = new PdfDocument(new PdfWriter(outFileName));
+        // No place for any symbol (page width is fully occupied by margins)
+        Document doc = new Document(pdfDocument, new PageSize(72, 1000));
+
+        Paragraph paragraph = new Paragraph()
+                .add(new Text("\u00A0First"));
+
+        paragraph.setProperty(Property.RENDERING_MODE, RenderingMode.HTML_MODE);
+        doc.add(paragraph);
+
+        doc.close();
+
+        Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder));
+    }
+
+    @Test
+    public void nbspCannotBeFitAndIsTheLastSymbolOfFirstChunkTest() throws IOException, InterruptedException {
+        String outFileName = destinationFolder + "nbspCannotBeFitAndIsTheLastSymbolOfFirstChunkTest.pdf";
+        String cmpFileName = sourceFolder + "cmp_nbspCannotBeFitAndIsTheLastSymbolOfFirstChunkTest.pdf";
+
+        PdfDocument pdfDocument = new PdfDocument(new PdfWriter(outFileName));
+        // No place for the second symbol
+        Document doc = new Document(pdfDocument, new PageSize(81, 1000));
+
+        Paragraph paragraph = new Paragraph()
+                .add(new Text("H\u00A0"))
+                .add(new Text("ello"));
+
+        paragraph.setProperty(Property.RENDERING_MODE, RenderingMode.HTML_MODE);
+        doc.add(paragraph);
+
+        doc.close();
+
+        Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder));
+    }
+
     @Test
     @LogMessages(messages = {
             @LogMessage(messageTemplate = LogMessageConstant.CREATE_COPY_SHOULD_BE_OVERRIDDEN, count = 8)