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Retrieve the coordinates of a Paragraph in iText

I'm trying to retrieve the x, y coordinates from a Paragraph created in iText. I followed the approved answer in How to get vertical cursor position when writing document in iText 7? but I'm not getting the expected result.
PdfDocument pdfDoc = new PdfDocument(new PdfWriter("output/ITextSandbox/Coordinates.pdf"));
pdfDoc.setDefaultPageSize(PageSize.LETTER); // 8.5 x 11
Document document = new Document(pdfDoc);
PdfFont font = PdfFontFactory.createFont(StandardFonts.COURIER, PdfEncodings.UTF8);
document.setFont(font);
document.setFontSize(10);
Paragraph paragraph = null;
// Print 5 lines to ensure the y coord is sufficiently moved away from the top of the page.
for (int i = 1; i <= 5; i++)
{
paragraph = new Paragraph();
paragraph.add(new Text("Line " + i));
document.add(paragraph);
}
// Print a new paragraph from which to obtain the x, y coordinates.
paragraph = new Paragraph();
paragraph.add(new Text("Line 6"));
document.add(paragraph);
// Follow the steps from the approved answer in
// https://stackoverflow.com/questions/51953723/how-to-get-vertical-cursor-position-when-writing-document-in-itext-7
IRenderer renderer = paragraph.createRendererSubTree().setParent(document.getRenderer());
float width = document.getPageEffectiveArea(PageSize.LETTER).getWidth();
float height = document.getPageEffectiveArea(PageSize.LETTER).getHeight();
LayoutResult layoutResult = renderer.layout(new LayoutContext(new LayoutArea(1, new Rectangle(width, height))));
float y = layoutResult.getOccupiedArea().getBBox().getY();
float x = layoutResult.getOccupiedArea().getBBox().getX();
System.out.println("x = " + x + ", y = " + y); // y should be approximately 630, not 710.
With standard margins and 10 pt font, the coordinates for the 6th line should approximately be x = 0, y = 630. Instead, I get y = 710.

The code sample in the question simulates rendering on a certain layout area. That approach works to determine the coordinates on the page if the exact same elements are simulated on the exact same layout area.
In the question, only the 6th paragraph is simulated, so the larger y coordinate (higher on the page) is expected. To get the correct y coordinate, the 5 preceding paragraphs would also have to be simulated.
Moreover, the layout area is not the same as page. This code does not take into account the page margins correctly:
float width = document.getPageEffectiveArea(PageSize.LETTER).getWidth();
float height = document.getPageEffectiveArea(PageSize.LETTER).getHeight();
LayoutResult layoutResult =
renderer.layout(new LayoutContext(new LayoutArea(1, new Rectangle(width, height))));
With the default page margins of 36, the correct layout area would be:
float width = document.getPageEffectiveArea(PageSize.LETTER).getWidth();
float height = document.getPageEffectiveArea(PageSize.LETTER).getHeight();
LayoutResult layoutResult =
renderer.layout(new LayoutContext(new LayoutArea(1, new Rectangle(36, 36, width, height))));
A much easier way to get the current coordinates after rendering some elements is:
/*...*/
paragraph = new Paragraph();
paragraph.add(new Text("Line 6"));
document.add(paragraph);
Rectangle remaining = document.getRenderer().getCurrentArea().getBBox();
float y = remaining.getTop();
System.out.println("y = " + y);
Result: y = 631.6011
To illustrate the remaining layout area, let's draw it on the page:
PdfCanvas canvas = new PdfCanvas(pdfDoc.getPage(1));
canvas.setStrokeColor(ColorConstants.RED).rectangle(remaining).stroke();
With some different page margins:
document.setMargins(5, 25, 15, 5);

java code to highlight the color of text in pdf

I am using com.lowagie.text in my pdf. While generating it, I need to highlight a few text.This is the code i have.I need the code for Highlighting text in a chunk.
PdfContentByte cb = writer.getDirectContent();
Chunk chunck = new Chunk(arraySpec[k],font);
Phrase phrase = new Phrase(8.0f+ 1);
phrase.add(chunck);
ColumnText columnText = new ColumnText(cb);
columnText.addText(phrase);
//verify the bounding box size
if (attributeBoundingBoxTextWidth == 0){
attributeBoundingBoxTextWidth = (int) boardWidth;
}
float llx = xpos;
float lly = 0;
float urx = llx + width;
float ury = refYPos - sizeOftext;
refYPos = ury;
float leading = 8.0f+ 1;
columnText.setSimpleColumn(llx, lly, urx, ury, leading, Element.ALIGN_LEFT);
columnText.go();

I got a solution for the above post.
columnText.getCanvas().setColorFill(Color.decode("#FFA500"));
columnText.getCanvas().rectangle(llx, ury-(leading) ,columnText.getWidth(phrase) , sizeOftext);
columnText.getCanvas().fill();
columnText.go();

Scaling down and making image square in android

I need a way to scale an image down to 78x78. I have found ways of doing this by cutting part of the image off, like this:
Bitmap image = Bitmap.createBitmap(image, 0, 0, 78, 78);
but I need to maintain as much of the image as possible. I had thought of scaling the image down and then making it square:
Bitmap image = Bitmap.createScaledBitmap(imageTest, 78, 78, true);
but of course this creates a square image that is squashed.
Can anyone suggest how I can create a 78x78 image that doesn't rescale and maintains as much of the original image as possible?

From what I understood, you should scale down and center crop the image. Try this code out.
public Bitmap scaleCenterCrop(Bitmap source, int newHeight, int newWidth) {
int sourceWidth = source.getWidth();
int sourceHeight = source.getHeight();
// Compute the scaling factors to fit the new height and width, respectively.
// To cover the final image, the final scaling will be the bigger
// of these two.
float xScale = (float) newWidth / sourceWidth;
float yScale = (float) newHeight / sourceHeight;
float scale = Math.max(xScale, yScale);
// Now get the size of the source bitmap when scaled
float scaledWidth = scale * sourceWidth;
float scaledHeight = scale * sourceHeight;
// Let's find out the upper left coordinates if the scaled bitmap
// should be centered in the new size give by the parameters
float left = (newWidth - scaledWidth) / 2;
float top = (newHeight - scaledHeight) / 2;
// The target rectangle for the new, scaled version of the source bitmap will now
// be
RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
// Finally, we create a new bitmap of the specified size and draw our new,
// scaled bitmap onto it.
Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, source.getConfig());
Canvas canvas = new Canvas(dest);
canvas.drawBitmap(source, null, targetRect, null);
return dest;
}
Hope it helps

Try this:
Bitmap image = Bitmap.createScaledBitmap(testImage, (int) 78 * (testImage.getWidth() / testImage.getHeight()), 78, true);
image = Bitmap.createBitmap(image, (int) (image.getWidth() - 78) / 2, 78);
Haven't tested this, as I'm on my way to bed, but it should accomplish what you want, so long as your image has a width greater than or equal to its height.
Regardless, I'd suggest you use BufferedImage instead of Bitmap.

The idea here would be resize your image using the same resize rate for width and height keeping the smaller size in 78. After that you can use a center point based crop to get the middle of your image and making it a squared image.
Image srcImage;
int widthSrc = 150;
int heightSrc = 180;
float resizeRate = 78 / min(widthSrc, heightSrc);
Image resizedImage = resizeImage($srcImage, resizeRate);
int widthDest = 78;
int heightDest = 78;
int cropX = ($widthSrc - $widthDest)/2;
int cropY = ($heightSrc - $heightDest)/2;
Image croppedImage = cropImage(resizedImage,$widthDest, $heightDest, $cropX, $cropY);
If the image is already square you can skip the crop part.

iText- ColumnText set text fit size in Rectangle

I want to add text into a rectangle(x,y,w,h). Text should be fitted size of rectangle (mean it has a maximum size but it still contains in rectangle).
I tried to measure the text size base on BaseFont.getWidthPoint() The problem is the final text size can't fit the rect. It looks like this:
Here is my try:
PdfContentByte cb = writer.getDirectContent();
cb.saveState();
ColumnText ct = new ColumnText(writer.getDirectContent());
Font font = new Font(BaseFont.createFont());
int rectWidth = 80;
float maxFontSize = getMaxFontSize(BaseFont.createFont(), "text", rectWidth );
font.setSize(maxFontSize);
ct.setText(new Phrase("test", font));
ct.setSimpleColumn(10, 10, rectWidth , 70);
ct.go();
// draw the rect
cb.setColorStroke(BaseColor.BLUE);
cb.rectangle(10, 10, rectWidth , 70);
cb.stroke();
cb.restoreState();
// get max font size base on rect width
private static float getMaxFontSize(BaseFont bf, String text, int width){
float measureWidth = 1;
float fontSize = 0.1f;
float oldSize = 0.1f;
while(measureWidth < width){
measureWidth = bf.getWidthPoint(text, fontSize);
oldSize = fontSize;
fontSize += 0.1f;
}
return oldSize;
}
Could you please tell me where I am wrong?
Another problem, I want to measure for both width and height, which text completely contains in rectangle and has the maximum font size. Is there any way to do this?
Update: here is the complete source code that worked for me:
private static float getMaxFontSize(BaseFont bf, String text, int width, int height){
// avoid infinite loop when text is empty
if(TextUtils.isEmpty(text)){
return 0.0f;
}
float fontSize = 0.1f;
while(bf.getWidthPoint(text, fontSize) < width){
fontSize += 0.1f;
}
float maxHeight = measureHeight(bf, text, fontSize);
while(maxHeight > height){
fontSize -= 0.1f;
maxHeight = measureHeight(bf, text, fontSize);
};
return fontSize;
}
public static float measureHeight(BaseFont baseFont, String text, float fontSize)
{
float ascend = baseFont.getAscentPoint(text, fontSize);
float descend = baseFont.getDescentPoint(text, fontSize);
return ascend - descend;
}

The main issue
The main issue is that you use the wrong arguments in ct.setSimpleColumn:
ct.setSimpleColumn(10, 10, rectWidth , 70);
In contrast to the later cb.rectangle call
cb.rectangle(10, 10, rectWidth , 70);
which has arguments float x, float y, float w, float h (w and h being width and height) the method ct.setSimpleColumn has arguments float llx, float lly, float urx, float ury (ll being lower left and ur being upper right). Thus your ct.setSimpleColumn should look like this:
ct.setSimpleColumn(10, 10, 10 + rectWidth, 10 + 70);
A side issue
In addition to the main issue your result font size is 0.1 too large; essentially this is an error already pointed out by #David.
Your main loop in your getMaxFontSize method is this:
while(measureWidth < width){
measureWidth = bf.getWidthPoint(text, fontSize);
oldSize = fontSize;
fontSize += 0.1f;
}
This essentially results in oldSize (which eventually is returned) being the first font size which does not fit. You could fix this by instead using
while(bf.getWidthPoint(text, fontSize) < width){
oldSize = fontSize;
fontSize += 0.1f;
}
Even better would be an approach only calculating the string width once, not using a loop at all, e.g.
private static float getMaxFontSize(BaseFont bf, String text, int width)
{
int textWidth = bf.getWidth(text);
return (1000 * width) / textWidth;
}
(This method uses integer arithmetic. If you insist on an exact fit, switch to float or double arithmetic.)

There are two bugs here, both in
while(measureWidth < width){
measureWidth = bf.getWidthPoint(text, fontSize++);
}
You're staying in the loop until measureWidth >= width - in other words, by the time you escape from the while loop, measureWidth is already too big for the rectangle.
You're doing fontSize++, which means that after you've used fontSize to calculate measureWidth, you're increasing it. When you do get round to returning it, it's one more than the value you just tested. So the return value from the method will be one more than the last value that you tested (which, due to point 1., was already too big).

I've spent quite a while to implement such functionality using binary search method to find rectangle fitting font size. And today i stumbled upon an interesting method in iText...
It is quite a new method in iText ColumnText;
public float fitText(Font font, String text, Rectangle rect, float maxFontSize, int runDirection)
//Fits the text to some rectangle adjusting the font size as needed.
In my version of iText it is static.
See details: http://developers.itextpdf.com/reference/com.itextpdf.text.pdf.ColumnText

Align text to the right in a TextLayout, using Java Graphics2D API

So, I'm using the code in Java tutorial to draw a piece of text, but I don't know how to align text to the right margin.
I just included attstring.addAttribute(TextAttribute.RUN_DIRECTION, TextAttribute.RUN_DIRECTION_RTL); in the code for that case but it doesn't work.
protected float drawParagraph (Graphics2D g2, String text, float width, float x, float y, Boolean dir){
AttributedString attstring = new AttributedString(text);
attstring.addAttribute(TextAttribute.FONT, font);
if (dir == TextAttribute.RUN_DIRECTION_RTL){
attstring.addAttribute(TextAttribute.RUN_DIRECTION, TextAttribute.RUN_DIRECTION_RTL);
}
AttributedCharacterIterator paragraph = attstring.getIterator();
int paragraphStart = paragraph.getBeginIndex();
int paragraphEnd = paragraph.getEndIndex();
FontRenderContext frc = g2.getFontRenderContext();
LineBreakMeasurer lineMeasurer = new LineBreakMeasurer(paragraph, frc);
// Set break width to width of Component.
float breakWidth = width;
float drawPosY = y;
// Set position to the index of the first character in the paragraph.
lineMeasurer.setPosition(paragraphStart);
// Get lines until the entire paragraph has been displayed.
while (lineMeasurer.getPosition() < paragraphEnd) {
// Retrieve next layout. A cleverer program would also cache
// these layouts until the component is re-sized.
TextLayout layout = lineMeasurer.nextLayout(breakWidth);
// Compute pen x position. If the paragraph is right-to-left we
// will align the TextLayouts to the right edge of the panel.
// Note: drawPosX is always where the LEFT of the text is placed.
float drawPosX = (float) (layout.isLeftToRight()
? x : breakWidth - layout.getAdvance());
// Move y-coordinate by the ascent of the layout.
drawPosY += layout.getAscent();
// Draw the TextLayout at (drawPosX, drawPosY).
layout.draw(g2, drawPosX, drawPosY);
// Move y-coordinate in preparation for next layout.
drawPosY += layout.getDescent() + layout.getLeading();
}
return drawPosY;
}
Give a hand please, I'm lost ^^

The error was in the calculation of drawPosX. The working formula is drawPosX = (float) x + breakWidth - layout.getAdvance();
I ended up doing a little fix to support center alignment and here is the code:
public abstract class MyClass extends JPanel implements Printable{
[...]
public static enum Alignment {RIGHT, LEFT, CENTER};
[...]
/**
* Draw paragraph.
* Pinta un parrafo segun las localizaciones pasadas como parametros.
*
* #param g2 Drawing graphic.
* #param text String to draw.
* #param width Paragraph's desired width.
* #param x Start paragraph's X-Position.
* #param y Start paragraph's Y-Position.
* #param dir Paragraph's alignment.
* #return Next line Y-position to write to.
*/
protected float drawParagraph (Graphics2D g2, String text, float width, float x, float y, Alignment alignment){
AttributedString attstring = new AttributedString(text);
attstring.addAttribute(TextAttribute.FONT, font);
AttributedCharacterIterator paragraph = attstring.getIterator();
int paragraphStart = paragraph.getBeginIndex();
int paragraphEnd = paragraph.getEndIndex();
FontRenderContext frc = g2.getFontRenderContext();
LineBreakMeasurer lineMeasurer = new LineBreakMeasurer(paragraph, frc);
// Set break width to width of Component.
float breakWidth = width;
float drawPosY = y;
// Set position to the index of the first character in the paragraph.
lineMeasurer.setPosition(paragraphStart);
// Get lines until the entire paragraph has been displayed.
while (lineMeasurer.getPosition() < paragraphEnd) {
// Retrieve next layout. A cleverer program would also cache
// these layouts until the component is re-sized.
TextLayout layout = lineMeasurer.nextLayout(breakWidth);
// Compute pen x position.
float drawPosX;
switch (alignment){
case RIGHT:
drawPosX = (float) x + breakWidth - layout.getAdvance();
break;
case CENTER:
drawPosX = (float) x + (breakWidth - layout.getAdvance())/2;
break;
default:
drawPosX = (float) x;
}
// Move y-coordinate by the ascent of the layout.
drawPosY += layout.getAscent();
// Draw the TextLayout at (drawPosX, drawPosY).
layout.draw(g2, drawPosX, drawPosY);
// Move y-coordinate in preparation for next layout.
drawPosY += layout.getDescent() + layout.getLeading();
}
return drawPosY;
}
}