I seem to have an issue after upgrading iText from 2.1.7 where the PDF seems to be missing or the image has shrunk between pages.
I'm wondering if this is a known issue or if there is something that I need to set in order to fix it.
Some context:
no real calculations have been changed when switching libraries.
the general structure is that we have a Document which has a pdfTable which holds a bunch of pdfImages.
changing between landscape and portrait produces different results.
the images are scaled down so that it will fit the page.
Edit: Sorry, my application was pretty big and does a bunch of work. I had to make a simple mock version before posting the problem
Sample Code (So the numbers are just examples that I used. I basically added a 800*600 Image 5 times using landscape position. I end up seeing only 3 pages when I am expecting 5.)
Note: Using portrait page size shows all 5 but it seems that the sizes vary for some reason.
ByteArrayOutputStream baos = createTemporaryOutputStream();
Document doc = newDocument();
PdfWriter writer = newWriter(doc, baos);
writer.setViewerPreferences(PdfWriter.ALLOW_PRINTING | PdfWriter.PageLayoutSinglePage);
//create page rectangle landscape
Rectangle page = new Rectangle(PageSize.A4.rotate());
doc.setPageSize(page);
doc.setMargins((float)36.0, (float)36.0, (float)36.0, (float)36.0);
doc.open();
//create element pdf table.
PdfPTable table = new PdfPTable(new float[]{(float) 770.0});
table.setWidthPercentage(100);
table.setSplitRows(true);
table.setSplitLate(false);
table.setHeaderRows(0);
// in my case I used 5 800*600 images (same picture)
//then I loop through them and create pdfcell
//and then add it to table which then gets added to the document
List<Image> hi = (List<Image>) model.get("images");
for (Image image : hi) {
com.itextpdf.text.Image pdfImage = com.itextpdf.text.Image.getInstance(image.getBytes());
pdfImage.scalePercent((float) (0.8642384 * 100));
PdfPCell cell = new PdfPCell(pdfImage, false);
table.addCell(cell);
}
doc.add(table);
doc.close();
Related
let's say I have a bunch of pdf files that I want to migrate into a new pdf. BUT the new pdf file is a table-structured file. And the content of the pdf files should fit in the first cell of a two-column-table.
I am not sure if the approach of working with tables is correct. I am open to any other solutions. All I want is at the end some custom text at the top, followed by pdf content and a checkbox on the right side. (One per pdf content)
What I have so far:
`
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
Document doc = new Document(pdfDoc, PageSize.A4);
doc.SetMargins(0f, 0f, 18f, 18f);
PdfReader reader = new PdfReader(src);
PdfDocument srcDoc = new PdfDocument(reader);
Table table = new Table(new float[] { 2f, 1f });
PdfFormXObject imagePage = srcDoc.GetFirstPage().CopyAsFormXObject(pdfDoc);
var image = new Image(imagePage);
Cell cell = new Cell().Add(image);
cell.SetHorizontalAlignment(HorizontalAlignment.LEFT);
cell.SetVerticalAlignment(VerticalAlignment.TOP);
table.AddCell(cell);
Table checkTable = new Table(2);
Cell cellCheck1 = new Cell();
cellCheck1.SetNextRenderer(new CheckboxCellRenderer(cellCheck1, "cb1", 0));
cellCheck1.SetHeight(50);
checkTable.AddCell(cellCheck1);
Cell cellCheck2 = new Cell();
cellCheck2.SetNextRenderer(new CheckboxCellRenderer(cellCheck2, "cb2", 1));
cellCheck2.SetHeight(50);
checkTable.AddCell(cellCheck2);
table.AddCell(checkTable);
doc.Add(table);
doc.Close();`
My Problem here is that the pdf content has still its margin. Which completely spoils the design. It is so frustrating, I appreciate any help.
You say
My Problem here is that the pdf content has still its margin. Which completely spoils the design.
PDFs (usually) don't know anything about margins. Thus, you have to detect the margins of the page to import first. You can do this by parsing the page content into an event listener that keeps track of the bounding box of drawing instructions, like the TextMarginFinder. Then you can reduce the source page to those dimensions. This can be done by means of the following method:
PdfPage restrictToText(PdfPage page)
{
TextMarginFinder finder = new TextMarginFinder();
new PdfCanvasProcessor(finder).ProcessPageContent(page);
Rectangle textRect = finder.GetTextRectangle();
page.SetMediaBox(textRect);
page.SetCropBox(textRect);
return page;
}
You apply this method in your code right before you copy the page as form XObject, i.e. you replace
PdfFormXObject imagePage = srcDoc.GetFirstPage().CopyAsFormXObject(pdfDoc);
by
PdfFormXObject imagePage = restrictToText(srcDoc.GetFirstPage()).CopyAsFormXObject(pdfDoc);
This causes the Image this XObject will be embedded in to have the correct size. Unfortunately it will be somewhat mispositioned because the restricted page still has the same coordinate system as the original one, merely its crop box defines a smaller section than before. To fix this, one has to apply an offset, one has to subtract the coordinates of the lower left corner of the page crop box which has become the XObject bounding box. Thus, add after instantiating the Image the following code:
Rectangle bbox = imagePage.GetBBox().ToRectangle();
image.SetProperty(Property.LEFT, -bbox.GetLeft());
image.SetProperty(Property.BOTTOM, -bbox.GetBottom());
image.SetProperty(Property.POSITION, LayoutPosition.RELATIVE);
Now the restricted page is properly positioned in your table cell.
Beware: The TextMarginFinder (as its name indicates) determines the margins by text alone. Thus, if the page contains other contents, too, e.g. decorations like a logo, this logo is ignored and might eventually be cut out. If you want such decorations, too, in your overviews, you have to use a different margin finder class.
I'm using iTextSharp to display images in a pdf report. Here I want display two images in a row and it's working as expected but having a issue when end of the page reaches. The issue is that last row images get shrink to fit in same page, it doesn't automatically add it to the next page. All images having same dimension and resolution.
Please, provide us with the code.
I wrote the test below (although it's in java, there should be no problem) and the results seem to be correct.
public void tableWithImagesTest01() throws IOException, InterruptedException {
String testName = "tableWithImagesTest01.pdf";
String outFileName = destinationFolder + testName;
String cmpFileName = sourceFolder + "cmp_" + testName;
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(outFileName));
Document doc = new Document(pdfDoc, PageSize.A3);
Image image1 = new Image(ImageDataFactory.create(sourceFolder + "itis.jpg"));
Table table = new Table(2);
for (int i = 0; i < 20; i++) {
table.addCell(new Cell().add(image1));
table.addCell(new Cell().add(image1));
table.addCell(new Cell().add(new Paragraph("Hello")));
table.addCell(new Cell().add(new Paragraph("World")));
}
doc.add(table);
doc.close();
Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder, "diff"));
}
The result pdf looks like this:
Maybe you use summat image1.setAutoScale(true);? Still we need your code to look at.
The easiest solution (considering all images have the same dimension and resolution) would be to manually insert a new page and pagebreak every time you have inserted the maximum number of images to a page.
Taken from a comment below, the solution that works is, on the individual images you need to set:
image.ScaleToFitHeight = false;
Likely to happen when keeping rows together
Hi I recently posted a question here :
IText PDFImage seems to shrink or disappear during new pages after upgrade from 2.1.7 to 5.5.5 (Java .jars)
But I think it is not the problem with the library but more of a missing setting sort of problem. I am wondering if there is a way to control what element gets drawn on the existing page verses pushing to a new page
I want to do the following
-create document
-create pdfPTable
-create a bunch of image element for each PdfPCells
-add to pdfPTable then write to document
Result: It seems that some images get shrink near the end/beginng of the page or is missing ( seems like its trying to fit on to the page )
Sample code again for visibility
ByteArrayOutputStream baos = createTemporaryOutputStream();
Document doc = newDocument();
PdfWriter writer = newWriter(doc, baos);
writer.setViewerPreferences(PdfWriter.ALLOW_PRINTING | PdfWriter.PageLayoutSinglePage);
//create page rectangle landscape
Rectangle page = new Rectangle(PageSize.A4.rotate());
doc.setPageSize(page);
doc.setMargins((float)36.0, (float)36.0, (float)36.0, (float)36.0);
doc.open();
//create element pdf table.
PdfPTable table = new PdfPTable(new float[]{(float) 770.0});
table.setWidthPercentage(100);
table.setSplitRows(true);
table.setSplitLate(false);
table.setHeaderRows(0);
// in my case I used 5 800*600 images (same picture)
//then I loop through them and create pdfcell
//and then add it to table which then gets added to the document
List<Image> hi = (List<Image>) model.get("images");
for (Image image : hi) {
com.itextpdf.text.Image pdfImage = com.itextpdf.text.Image.getInstance(image.getBytes());
pdfImage.scalePercent((float) (0.8642384 * 100));
PdfPCell cell = new PdfPCell(pdfImage, false);
table.addCell(cell);
}
doc.add(table);
doc.close();
thank you for your time. Any insight as to what my problem is would be helpful
I have a pdf which include text written in Type 3 Font.
I want to get some text from it and write it into other pdf in exactly same shape.
I am using itext. Please give me a tip.
edit: I attached my code.
DocumentFont f = renderInfo.getFont();
String str = renderInfo.getText();
x = renderInfo.getBaseline().getStartPoint().get(Vector.I1);
In this code, I want to write str into x value position.
In Type 3 Font, is it work?
You can copy parts of one page to a new one using code like this:
InputStream resourceStream = getClass().getResourceAsStream("from.pdf");
PdfReader reader = new PdfReader(new FileOutputStream("from.pdf"));
Rectangle pagesize = reader.getPageSizeWithRotation(1);
Document document = new Document(pagesize);
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("areaOfFrom.pdf"));
document.open();
PdfContentByte content = writer.getDirectContent();
PdfImportedPage page = writer.getImportedPage(reader, 1);
content.saveState();
content.rectangle(0, 350, 360, 475);
content.clip();
content.newPath();
content.addTemplate(page, 0, 0);
content.restoreState();
document.close();
reader.close();
This turns your
into
Unfortunately, though, that hidden content is merely... hidden... but it is still there. You can especially mark the lines with that hidden text and try to copy&paste them.
If you want to completely remove that hidden text (or start out by merely copying the desired text), you have to inspect the content of the imported page and filter it. I'm afraid iText does not yet explicitly support something like that. It can be done using the iText lowlevel API but it is quite some work.
When creating a PDF from scratch, I'm trying to adapt this code
http://itextpdf.com/examples/iia.php?id=104
specifically the onEndPage() function shown there, to set a footer using page events. The problem is in my application, some pages are Portrait and some Landscape, and I don't know how to implement a query in that function to determine the page rotation.
First, I got it working when all pages are portrait. Then I added some landscape pages and tried to modify it as shown below. I originally thought a quick-and-dirty solution would be simply to center the footer table by adding,
table.setHorizontalAlignment(Element.ALIGN_CENTER);
but this didn't seem to have any effect (on landscape pages, the table is always aligned left on the long-edge of the paper). Then I tried to do a better solution by querying the page rotation, and based on its results, set the table columns to the correct widths, using,
if (???==90)
table.setTotalWidth(new float[]{2.25f*K.PPI,1.195f*K.PPI,0.805f*K.PPI,2.25f*K.PPI,}); // add to 6.5"
else
table.setTotalWidth(new float[]{3.25f*K.PPI,1.195f*K.PPI,0.805f*K.PPI,3.25f*K.PPI,}); // add to 6.5"
but I'm not sure how to query the page rotation (as you can tell). Any help would be appreciated. My code is as follows.
class HeaderFooter extends PdfPageEventHelper {
/** The header text. */
String footerLeft, footerRight;
/** The template with the total number of pages. */
PdfTemplate total;
/** Flag indicating true for first page */
Boolean firstPageFlag=true;
...
public void onEndPage(PdfWriter writer, Document document) {
if (firstPageFlag==false) {
/** The footer font */
FontFactory.register("/home/appFonts/Arial_Narrow.ttf", "arial_narrow");
Font styleFooter = FontFactory.getFont("arial_narrow", BaseFont.IDENTITY_H, BaseFont.EMBEDDED, K.TEXT_FOOTER_FONT_SIZE, Font.UNDEFINED, BaseColor.BLACK);
PdfPTable table = new PdfPTable(4);
try {
//table.setHorizontalAlignment(Element.ALIGN_CENTER); // doesn't seem to have an effect for landscape pages
if (how to query page rotation, or other method to evaluate whether page is landscape or portrait?)
table.setTotalWidth(new float[]{2.25f*K.PPI,1.195f*K.PPI,0.805f*K.PPI,2.25f*K.PPI,}); // add to 6.5"
else
table.setTotalWidth(new float[]{3.25f*K.PPI,1.195f*K.PPI,0.805f*K.PPI,3.25f*K.PPI,}); // add to 8.5"
table.setLockedWidth(true);
table.getDefaultCell().setFixedHeight(14);
table.getDefaultCell().setBorder(Rectangle.TOP);
// col1, row1
table.addCell(new Phrase(footerLeft, styleFooter));
table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
// col2, row1
table.addCell(new Phrase(String.format("page %d of", writer.getPageNumber()),styleFooter));
// col3, row1
PdfPCell cell = new PdfPCell(Image.getInstance(total));
cell.setBorder(Rectangle.TOP);
table.addCell(cell);
// col4, row1
table.addCell(new Phrase(footerRight, styleFooter));
table.writeSelectedRows(0,-1,document.left(),document.bottom()-0.35f*K.PPI,writer.getDirectContent());
} catch (DocumentException de) {
throw new ExceptionConverter(de);
}
} else
firstPageFlag=false;
}
...
}
Summarizing the solution developed in the comments to the question
As #Bruno initially stated correctly, the original attempt of the OP was
mixing page events (used when creating PDFs from scratch) with PdfReader (used when manipulating existing PDFs).
It would have been possible to actually use the OP's PdfReader centric test for landscape by switching to a two-pass architecture as used in the sample TwoPasses.java but the OP preferred a one-pass approach.
For this one-pass approach the original HeaderFooter page event listener was extended to also store the page dimension information upon page construction. This was done by overriding onStartPage() to retrieve the page size using
Rectangle pSize=document.getPageSize();
and storing its relevant information in a member variable of the listener. Eventually this information now is used in onEndPage() to determine how to set table columns.
In case of the OP's processes, landscape pages are created by means of rotation. Thus the relevant information in his case was whether
(pSize.getRotation()==90)
is true (landscape) or not (portrait). In general the whole Rectangle including both its rotation and its dimension values would have to be stored and eventually be used to determine the desired header and footer locations.