Modifying found watermark properties Leave feedback
GroupDocs.Watermark also allows you to replace text and image in the found possible watermarks. Following sections will show you how to replace text and image of a found watermark.
To replace text of the found watermarks, loop through the possible watermarks in the watermark collection and call setText() method as shown in the following code sample.
advanced_usage.searching_and_modifying_watermarks.EditTextInFoundWatermarks
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\document.pdf"
Watermarker watermarker = new Watermarker("document.pdf");
TextSearchCriteria searchCriteria = new TextSearchCriteria("test", false);
PossibleWatermarkCollection watermarks = watermarker.search(searchCriteria);
for (PossibleWatermark watermark : watermarks)
{
try
{
// Edit text
watermark.setText("passed");
}
catch (Exception e)
{
// Found entity may not support text editing
// Passed argument can have inappropriate value
// Process such cases here
}
}
// Save document
watermarker.save("document.pdf");
watermarker.close();
You can also replace the watermark’s text with formatting as shown in the below code sample.
advanced_usage.searching_and_modifying_watermarks.EditTextWithFormattingInFoundWatermarks
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\document.pdf"
Watermarker watermarker = new Watermarker("document.pdf");
TextSearchCriteria searchCriteria = new TextSearchCriteria("test", false);
PossibleWatermarkCollection watermarks = watermarker.search(searchCriteria);
for (PossibleWatermark watermark : watermarks)
{
try
{
// Edit text
watermark.getFormattedTextFragments().clear();
watermark.getFormattedTextFragments().add("passed", new Font("Calibri", 19, FontStyle.Bold), Color.getRed(), Color.getAqua());
}
catch (Exception e)
{
// Found entity may not support text editing
// Passed arguments can have inappropriate value
// Process such cases here
}
}
// Save document
watermarker.save("document.pdf");
watermarker.close();
Following code sample shows how to replace the image of the found watermarks using GroupDocs.Watermark.
advanced_usage.searching_and_modifying_watermarks.ReplacesImageInFoundWatermarks
File imageFile = new File("image.png");
byte[] imageData = new byte[(int) imageFile.length()];
InputStream imageInputStream = new FileInputStream(imageFile);
imageInputStream.read(imageData);
imageInputStream.close();
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\document.pdf"
Watermarker watermarker = new Watermarker("document.pdf");
// Search watermark matching a particular image
SearchCriteria searchCriteria = new ImageDctHashSearchCriteria("logo.bmp");
PossibleWatermarkCollection watermarks = watermarker.search(searchCriteria);
for (PossibleWatermark watermark : watermarks)
{
try
{
// Replace image
watermark.setImageData(imageData);
}
catch (Exception e)
{
// Found entity may not support image replacement
// Passed image can have inappropriate format
// Process such cases here
}
}
// Save document
watermarker.save("document.pdf");
watermarker.close();
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