/** * Captures text using a simplified algorithm for inserting hard returns and spaces * @param renderInfo render info */ public virtual void RenderText(TextRenderInfo renderInfo) { bool firstRender = result.Length == 0; bool hardReturn = false; LineSegment segment = renderInfo.GetBaseline(); Vector start = segment.GetStartPoint(); Vector end = segment.GetEndPoint(); if (!firstRender) { Vector x0 = start; Vector x1 = lastStart; Vector x2 = lastEnd; // see http://mathworld.wolfram.com/Point-LineDistance2-Dimensional.html float dist = (x2.Subtract(x1)).Cross((x1.Subtract(x0))).LengthSquared / x2.Subtract(x1).LengthSquared; float sameLineThreshold = 1f; // we should probably base this on the current font metrics, but 1 pt seems to be sufficient for the time being if (dist > sameLineThreshold) { hardReturn = true; } // Note: Technically, we should check both the start and end positions, in case the angle of the text changed without any displacement // but this sort of thing probably doesn't happen much in reality, so we'll leave it alone for now } if (hardReturn) { //System.out.Println("<< Hard Return >>"); AppendTextChunk('\n'); } else if (!firstRender) { if (result[result.Length - 1] != ' ' && renderInfo.GetText().Length > 0 && renderInfo.GetText()[0] != ' ') // we only insert a blank space if the trailing character of the previous string wasn't a space, and the leading character of the current string isn't a space { float spacing = lastEnd.Subtract(start).Length; if (spacing > renderInfo.GetSingleSpaceWidth() / 2f) { AppendTextChunk(' '); //System.out.Println("Inserting implied space before '" + renderInfo.GetText() + "'"); } } } else { //System.out.Println("Displaying first string of content '" + text + "' :: x1 = " + x1); } //System.out.Println("[" + renderInfo.GetStartPoint() + "]->[" + renderInfo.GetEndPoint() + "] " + renderInfo.GetText()); AppendTextChunk(renderInfo.GetText()); lastStart = start; lastEnd = end; }
/** * @see com.itextpdf.text.pdf.parser.RenderFilter#allowText(com.itextpdf.text.pdf.parser.TextRenderInfo) */ public override bool AllowText(TextRenderInfo renderInfo) { LineSegment segment = renderInfo.GetBaseline(); Vector startPoint = segment.GetStartPoint(); Vector endPoint = segment.GetEndPoint(); float x1 = startPoint[Vector.I1]; float y1 = startPoint[Vector.I2]; float x2 = endPoint[Vector.I1]; float y2 = endPoint[Vector.I2]; return(filterRect.IntersectsLine(x1, y1, x2, y2)); }
public void TestType3FontWidth() { String inFile = "type3font_text.pdf"; LineSegment origLineSegment = new LineSegment(new Vector(20.3246f, 769.4974f, 1.0f), new Vector(151.22923f, 769.4974f, 1.0f)); PdfReader reader = TestResourceUtils.GetResourceAsPdfReader(TEST_RESOURCES_PATH, inFile); TextPositionRenderListener renderListener = new TextPositionRenderListener(); PdfContentStreamProcessor processor = new PdfContentStreamProcessor(renderListener); PdfDictionary pageDic = reader.GetPageN(FIRST_PAGE); PdfDictionary resourcesDic = pageDic.GetAsDict(PdfName.RESOURCES); processor.ProcessContent(ContentByteUtils.GetContentBytesForPage(reader, FIRST_PAGE), resourcesDic); Assert.AreEqual(renderListener.LineSegments[FIRST_ELEMENT_INDEX].GetStartPoint()[FIRST_ELEMENT_INDEX], origLineSegment.GetStartPoint()[FIRST_ELEMENT_INDEX], 1/2f); Assert.AreEqual(renderListener.LineSegments[FIRST_ELEMENT_INDEX].GetEndPoint()[FIRST_ELEMENT_INDEX], origLineSegment.GetEndPoint()[FIRST_ELEMENT_INDEX], 1/2f); }
/** * * @see com.itextpdf.text.pdf.parser.RenderListener#renderText(com.itextpdf.text.pdf.parser.TextRenderInfo) */ public virtual void RenderText(TextRenderInfo renderInfo) { LineSegment segment = renderInfo.GetBaseline(); if (renderInfo.GetRise() != 0) { // remove the rise from the baseline - we do this because the text from a super/subscript render operations should probably be considered as part of the baseline of the text the super/sub is relative to Matrix riseOffsetTransform = new Matrix(0, -renderInfo.GetRise()); segment = segment.TransformBy(riseOffsetTransform); } TextChunk location = new TextChunk(renderInfo.GetText(), segment.GetStartPoint(), segment.GetEndPoint(), renderInfo.GetSingleSpaceWidth()); locationalResult.Add(location); }
public ITextChunkLocation CreateLocation(TextRenderInfo renderInfo, LineSegment baseline) { return(new TextChunkLocationDefaultImp(baseline.GetStartPoint(), baseline.GetEndPoint(), renderInfo.GetSingleSpaceWidth())); }
/** * * @see com.itextpdf.text.pdf.parser.RenderListener#renderText(com.itextpdf.text.pdf.parser.TextRenderInfo) */ public void RenderText(TextRenderInfo renderInfo) { LineSegment segment = renderInfo.GetBaseline(); TextChunk location = new TextChunk(renderInfo.GetText(), segment.GetStartPoint(), segment.GetEndPoint(), renderInfo.GetSingleSpaceWidth()); locationalResult.Add(location); }