/// <summary>Places retrieved text to canvas to a separate layer.</summary>
/// <param name="imageSize">
/// size of the image according to the selected
/// <see cref="ScaleMode"/>
/// </param>
/// <param name="pageText">text that was found on this image (or on this page)</param>
/// <param name="pdfCanvas">canvas to place the text</param>
/// <param name="multiplier">coefficient to adjust text placing on canvas</param>
/// <param name="pageMediaBox">page parameters</param>
private void AddTextToCanvas(Rectangle imageSize, IList <TextInfo> pageText, PdfCanvas pdfCanvas, float multiplier
, Rectangle pageMediaBox)
{
if (pageText != null && pageText.Count > 0)
{
Point imageCoordinates = PdfCreatorUtil.CalculateImageCoordinates(ocrPdfCreatorProperties.GetPageSize(), imageSize
);
foreach (TextInfo item in pageText)
{
String line = item.GetText();
IList <float> coordinates = item.GetBbox();
float left = coordinates[0] * multiplier;
float right = (coordinates[2] + 1) * multiplier - 1;
float top = coordinates[1] * multiplier;
float bottom = (coordinates[3] + 1) * multiplier - 1;
float bboxWidthPt = PdfCreatorUtil.GetPoints(right - left);
float bboxHeightPt = PdfCreatorUtil.GetPoints(bottom - top);
FontProvider fontProvider = GetOcrPdfCreatorProperties().GetFontProvider();
String fontFamily = GetOcrPdfCreatorProperties().GetDefaultFontFamily();
if (!String.IsNullOrEmpty(line) && bboxHeightPt > 0 && bboxWidthPt > 0)
{
Document document = new Document(pdfCanvas.GetDocument());
document.SetFontProvider(fontProvider);
// Scale the text width to fit the OCR bbox
float fontSize = PdfCreatorUtil.CalculateFontSize(document, line, fontFamily, bboxHeightPt, bboxWidthPt);
float lineWidth = PdfCreatorUtil.GetRealLineWidth(document, line, fontFamily, fontSize);
float deltaX = PdfCreatorUtil.GetPoints(left);
float deltaY = imageSize.GetHeight() - PdfCreatorUtil.GetPoints(bottom);
iText.Layout.Canvas canvas = new iText.Layout.Canvas(pdfCanvas, pageMediaBox);
canvas.SetFontProvider(fontProvider);
Text text = new Text(line).SetHorizontalScaling(bboxWidthPt / lineWidth);
Paragraph paragraph = new Paragraph(text).SetMargin(0).SetMultipliedLeading(1.2f);
paragraph.SetFontFamily(fontFamily).SetFontSize(fontSize);
paragraph.SetWidth(bboxWidthPt * 1.5f);
if (ocrPdfCreatorProperties.GetTextColor() != null)
{
paragraph.SetFontColor(ocrPdfCreatorProperties.GetTextColor());
}
else
{
paragraph.SetTextRenderingMode(PdfCanvasConstants.TextRenderingMode.INVISIBLE);
}
canvas.ShowTextAligned(paragraph, deltaX + (float)imageCoordinates.x, deltaY + (float)imageCoordinates.y,
TextAlignment.LEFT);
canvas.Close();
}
}
}
}
private static void SingleLimitedCanvasSizeCase(Document document, Paragraph paraOnCanvas, String description
, float canvasHeight, int pageNum)
{
PdfDocument pdfDocument = document.GetPdfDocument();
document.Add(new Paragraph(description).SetBorder(new SolidBorder(ColorConstants.RED, 1)));
PdfCanvas pdfCanvas = new PdfCanvas(pdfDocument.GetPage(pageNum));
Rectangle effectiveArea = document.GetPageEffectiveArea(pdfDocument.GetDefaultPageSize());
Rectangle rectangle = new Rectangle(36, 550, effectiveArea.GetWidth(), canvasHeight + LINES_SPACE_EPS);
pdfCanvas.SaveState().SetFillColor(ColorConstants.MAGENTA).Rectangle(rectangle).Fill().RestoreState();
iText.Layout.Canvas canvas = new iText.Layout.Canvas(pdfCanvas, pdfDocument, rectangle);
canvas.Add(paraOnCanvas);
canvas.Close();
}
public virtual void OverflowHiddenOnCanvasTest01()
{
String outFileName = destinationFolder + "overflowHiddenOnCanvasTest01.pdf";
String cmpFileName = sourceFolder + "cmp_overflowHiddenOnCanvasTest01.pdf";
PdfDocument pdfDocument = new PdfDocument(new PdfWriter(outFileName));
PdfPage page = pdfDocument.AddNewPage();
iText.Layout.Canvas canvas = new Canvas(new PdfCanvas(page), page.GetPageSize().Clone().ApplyMargins(36, 36
, 36, 36, false));
AddParaWithImgSetOverflowX(canvas, OverflowPropertyValue.HIDDEN);
canvas.Close();
pdfDocument.Close();
NUnit.Framework.Assert.IsNull(new CompareTool().CompareByContent(outFileName, cmpFileName, destinationFolder
, "diff"));
}
public virtual void HandleEvent(Event @event)
{
PdfDocumentEvent docEvent = (PdfDocumentEvent)@event;
PdfDocument pdf = docEvent.GetDocument();
PdfPage page = docEvent.GetPage();
int pageNumber = pdf.GetPageNumber(page);
Rectangle pageSize = page.GetPageSize();
PdfCanvas pdfCanvas = new PdfCanvas(page.GetLastContentStream(), page.GetResources(), pdf);
iText.Layout.Canvas canvas = new iText.Layout.Canvas(pdfCanvas, pdf, pageSize);
Paragraph p = new Paragraph().Add("Page ").Add(pageNumber.ToString()).Add(" of");
canvas.ShowTextAligned(p, this.x, this.y, TextAlignment.RIGHT);
pdfCanvas.AddXObject(this.placeholder, this.x + this.space, this.y - this.descent);
canvas.Close();
}