/**
* 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);
}
