I have a PDF viewer that doesn't show highlights if they do not have an appearance stream. I'm trying out iText 7 core in java to try and add highlight annotations to PDFs but these annotations do not have appearance streams, and thus I'm looking to try and add them myself when writing the annotations to the PDF file.
I've come across this old answer, but it's for C# and iText 5, and I can't seem to figure out how to replicate it in iText 7 with a successful result.
So my question is thus: how do you set appearance streams on the highlighting annotations in iText 7 core that are working?
The furthest I've gotten with the code is shown below. I'm using the RegexBasedLocationExtrationStrategy class to find the locations of all search words in the pdf.
RegexBasedLocationExtractionStrategy evntlstnr = new RegexBasedLocationExtractionStrategy(pattern);
for (int pIdx = 0; pIdx < pdfDoc.getNumberOfPages(); ++pIdx) {
final PdfPage page = pdfDoc.getPage(pIdx + 1);
new PdfCanvasProcessor(evntlstnr).processPageContent(page);
Collection<IPdfTextLocation> locations = evntlstnr.getResultantLocations();
for (IPdfTextLocation location : locations) {
Rectangle rect = location.getRectangle();
// Specify quad points in Z-like order
// [0,1] x1,y1 [2,3] x2,y2
// [4,5] x3,y3 [6,7] x4,y4
float[] quads = new float[8];
quads[0] = rect.getX();
quads[1] = rect.getY() + rect.getHeight();
quads[2] = rect.getX() + rect.getWidth();
quads[3] = quads[1];
quads[4] = quads[0];
quads[5] = rect.getY();
quads[6] = quads[2];
quads[7] = quads[5];
Color highlightColor = new DeviceRgb(0f, 0f, 1f);
PdfTextMarkupAnnotation highlight = PdfTextMarkupAnnotation.createHighLight(rect, quads);
highlight.setColor(highlightColor);
Rectangle appearRect = new Rectangle(0f, 0f, rect.getWidth(), rect.getHeight());
PdfFormXObject appearObj = new PdfFormXObject(appearRect);
final PdfResources appearRes = appearObj.getResources();
PdfExtGState extGState = new PdfExtGState();
extGState.setBlendMode(PdfExtGState.BM_MULTIPLY);
appearRes.addExtGState(extGState);
appearObj.setBBox(new PdfArray(new float[] {0f, 0f, rect.getWidth(), rect.getHeight()}));
PdfShading appearShading = new PdfShading.Axial(highlightColor.getColorSpace(), 0f, 0f, highlightColor.getColorValue(), 1f, 1f, highlightColor.getColorValue());
appearRes.addShading(appearShading);
appearRes.addColorSpace(highlightColor.getColorSpace());
PdfAnnotationAppearance appearance = new PdfAnnotationAppearance(appearObj.getPdfObject());
highlight.setNormalAppearance(appearance);
highlight.setFlag(PdfAnnotation.PRINT);
page.addAnnotation(highlight);
}
}
Using Samuel's answer I stumbled my way to a working answer.
I'm no expect in the PDF standard and this framework (iText), but my hypothesis, based on my working example below, is that the rectangle I was trying to write for the highlight is a crude fall-back method for "faking" the highlight rectangle when the viewer cannot render the annotations (since they have no appearance stream). Realizing this that the two operations are not linked, I came to the working example shown below. Hope this helps others in the future.
RegexBasedLocationExtractionStrategy evntlstnr = new RegexBasedLocationExtractionStrategy(pattern);
for (int pIdx = 0; pIdx < pdfDoc.getNumberOfPages(); ++pIdx) {
final PdfPage page = pdfDoc.getPage(pIdx + 1);
new PdfCanvasProcessor(evntlstnr).processPageContent(page);
Collection<IPdfTextLocation> locations = evntlstnr.getResultantLocations();
for (IPdfTextLocation location : locations) {
Rectangle rect = location.getRectangle();
// Specify quad points in Z-like order
// [0,1] x1,y1 [2,3] x2,y2
// [4,5] x3,y3 [6,7] x4,y4
float[] quads = new float[8];
quads[0] = rect.getX();
quads[1] = rect.getY() + rect.getHeight();
quads[2] = rect.getX() + rect.getWidth();
quads[3] = quads[1];
quads[4] = quads[0];
quads[5] = rect.getY();
quads[6] = quads[2];
quads[7] = quads[5];
Color highlightColor = new DeviceRgb(1f, 1f, 0f);
PdfTextMarkupAnnotation highlight = PdfTextMarkupAnnotation.createHighLight(rect, quads);
highlight.setColor(highlightColor);
highlight.setFlag(PdfAnnotation.PRINT);
page.addAnnotation(highlight);
PdfCanvas canvas = new PdfCanvas(page);
PdfExtGState extGState = new PdfExtGState();
extGState.setBlendMode(PdfExtGState.BM_MULTIPLY);
canvas.setExtGState(extGState);
canvas.rectangle(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight());
canvas.setFillColor(highlightColor);
canvas.fill();
canvas.release();
}
}
Related
I'm trying to create a PDF that's PAC3 approved for accessibility but I'm having an issue when it comes to the links I'm writing. This is the code I have one function that draws the text and tags it given the structType (this function is from https://github.com/chris271/UAPDFBox/blob/a8b280bcbc838722ba872d6b382b8fd45bd35303/src/com/wi/test/util/PDFormBuilder.java)
public PDStructureElement drawElement(Cell textCell, float x, float y, float height,PDStructureElement parent,
String structType, int pageIndex) throws IOException {
//Set up the next marked content element with an MCID and create the containing H1 structure element.
PDPageContentStream contents = new PDPageContentStream(pdf, pages.get(pageIndex),
PDPageContentStream.AppendMode.APPEND, false);
currentElem = addContentToParent(null, structType, parent);
setNextMarkedContentDictionary();
contents.beginMarkedContent(COSName.ARTIFACT, PDPropertyList.create(currentMarkedContentDictionary));
//Draws the cell itself with the given colors and location.
drawDataCell(textCell, x, y + height, height * 2, contents);
contents.endMarkedContent();
addContentToParent(COSName.ARTIFACT, null, currentElem);
contents.close();
//Set up the next marked content element with an MCID and create the containing P structure element.
contents = new PDPageContentStream(pdf, pages.get(pageIndex), PDPageContentStream.AppendMode.APPEND, false);
setNextMarkedContentDictionary();
contents.beginMarkedContent(COSName.P, PDPropertyList.create(currentMarkedContentDictionary));
//Draws the given text centered within the current table cell.
drawCellText(textCell, x, y + height + textCell.getFontSize(), contents, pages.get(pageIndex).getResources());
//End the marked content and append it's P structure element to the containing P structure element.
contents.endMarkedContent();
addContentToParent(COSName.P, null, currentElem);
contents.close();
return currentElem;
}
After it's written to the page I call a separate function to add the underline for hyperlinks
public void drawLink(float firstX,float firstY,float lastX,float width, float height,int pageNum, float lastCharWidth) throws IOException {
PDAnnotationTextMarkup markup = new PDAnnotationTextMarkup(PDAnnotationTextMarkup.SUB_TYPE_UNDERLINE);
PDRectangle position = new PDRectangle();
position.setLowerLeftX(firstX);
position.setLowerLeftY(firstY);
position.setUpperRightX(firstX + width);
position.setUpperRightY(firstY + height);
markup.setRectangle(position);
//need to modify quadpoints lastX so it's inline with link
float quadPoints[] = {firstX, firstY + height + 2,
lastX + lastCharWidth, firstY + height + 2,
firstX, firstY - 5,
lastX + lastCharWidth, firstY - 5};
markup.setQuadPoints(quadPoints);
PDColor color = new PDColor(new float[]{ 1, 15/ 255F, 1 }, PDDeviceRGB.INSTANCE);
markup.setColor(color);
pdf.getPage(pageNum).getAnnotations().add(markup);
}
The result of calling these 2 functions are below, it draws the link properly but I'm missing information for the annotation. My question is how do I utilize the PDAnnotation object to create a PAC3 approved annotation?
Image of PAC3 detailed results
How can I split a given paragraph to 2 paragraphs, due to that it fits only partial into canvas. After split, I would like to add the first part into canvas and the second to a new canvas.
public Paragraph addParagraphToPage(PdfDocument pdfDocument, int pageNum, Rectangle rectangle, Paragraph p)
{
PdfPage page = pdfDocument.getPage(pageNum);
PdfCanvas pdfCanvas = new PdfCanvas(page.newContentStreamAfter(), page.getResources(), pdfDocument);
Canvas canvas = new Canvas(pdfCanvas, pdfDocument, rectangle);
ParagraphRenderer currentRenderer = (ParagraphRenderer) p.createRendererSubTree();
currentRenderer.setParent(canvas.getRenderer());
result = currentRenderer.layout(new LayoutContext(new LayoutArea(pageNum, rectangle)));
ArrayList<Paragraph> paragraphs = new ArrayList<Paragraph>();
if (result.getStatus() != LayoutResult.FULL)
{
paragraphs = ????? // getNextParagraph(paragraphs, result, pageNum, rectangle, canvas);
if(paragraphs.size() == 2)
{
canvas.add( paragraphs.get(0));
return paragraphs.get(1);
}
}
return null;
}
Your approach is correct in general and layout in iText7 is flexible enough to allow you to do required thing in an easy manner. The only thing I see that is not very clear is that Paragraph is actually an element that cannot split itself and no classes in layout framework facilitate element splitting. You could do it manually, but there is no need to. Instead you should work with IRenderer, and ParagraphRenderer in particular, directly.
IRenderer can split itself as a result of layout operation and represents the necessary portion of data only compared to the Paragraph which contains full data.
You can add an IRenderer to the CanvasRenderer:
canvas.getRenderer().addChild(rendererToAdd.setParent(canvas.getRenderer()));
And you can access the partial renderers (the portion that fit the passed area and overflow part) from LayoutResult#getSplitRenderer() and LayoutResult#getOverflowRenderer().
In general, your code can be adapted like follows:
public ParagraphRenderer addParagraphToPage(PdfDocument pdfDocument, int pageNum, Rectangle rectangle, ParagraphRenderer renderer) {
PdfPage page = pdfDocument.getPage(pageNum);
PdfCanvas pdfCanvas = new PdfCanvas(page.newContentStreamAfter(), page.getResources(), pdfDocument);
Canvas canvas = new Canvas(pdfCanvas, pdfDocument, rectangle);
renderer.setParent(canvas.getRenderer());
LayoutResult result = renderer.layout(new LayoutContext(new LayoutArea(pageNum, rectangle)));
IRenderer rendererToAdd = result.getStatus() == LayoutResult.FULL ? renderer : result.getSplitRenderer();
canvas.getRenderer().addChild(rendererToAdd.setParent(canvas.getRenderer()));
return result.getStatus() != LayoutResult.FULL ? (ParagraphRenderer) result.getOverflowRenderer() : null;
}
And then for adding paragraph to sequential pages until all the content is placed you basically need only two lines of code:
ParagraphRenderer renderer = (ParagraphRenderer) p.createRendererSubTree();
while ((renderer = addParagraphToPage(pdfDocument, pageNum++, rectangle, renderer)) != null);
I'm creating shapes with extrude geometry on GWT, now I want to apply textures on it but I am not able to apply it directly. How can I do that?
My code looks like :
ExtrudeGeometry extrudeMaterialBoard = null;
shapeExtrude.getExtrudeSettings().amount = (int) getMaterialThickness();
shapeExtrude.getExtrudeSettings().curveSegments = 1;
shapeExtrude.getExtrudeSettings().bevelThickness= 5;
shapeExtrude.getExtrudeSettings().bevelSize= 5;
shapeExtrude.getExtrudeSettings().bevelEnabled= true;
shapeExtrude.getExtrudeSettings().material = 0;
shapeExtrude.getExtrudeSettings().extrudeMaterial = 1;
extrudeMaterialBoard = new ExtrudeGeometry(DrawShape.getBottomBoard(), shapeExtrude.getExtrudeSettings());
camera = new PerspectiveCamera(
70, // fov
getRenderer().getAbsoluteAspectRation(), // aspect
1, // near
1000 // far
);
camera.getPosition().setZ(400);
String texture1 = "uvgrid0.jpg";
MeshBasicMaterial material = new MeshBasicMaterial();
material.setColor(getColor(COLOR_TRANSPARENT));
Texture texture = new Texture(texture1);
material.setMap(texture);
mesh = new Mesh(extrudeMaterialBoard, material);
getScene().add(mesh);
getRenderer().render(getScene(), camera);
If I use cube geometry then its running properly. But in case of extrude geometry its not working.
Thanks in advance.
I am using com.lowagie.text to create PDF in my code. All is working fine except I am trying to align my cell content vertically. I want cell text to be in the middle of the cell height.
This is my code
PdfPCell cell = new PdfPCell(new Phrase(value, fontValueNew));
cell.setBorder(o);
cell.setBackgroundColor(new Color(233,232,232));
cell.setHorizontalAlignment(Element.ALIGN_LEFT);
cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
Here ,horizontal alignment is working fine but vertical alignment is not effective.
I'm not too sure as to why, but this works for me (vertical center alignment):
String headingLabel = "Test";
Paragraph heading = new Paragraph(headingLabel,
new Font(helvetica, 28, Font.NORMAL, new BaseColor(0, 0, 0)));
Float textWidth = ColumnText.getWidth(heading);
Float maxAllowed = 630f;
while (maxAllowed < textWidth) {
fontSize -= 2;
heading = new Paragraph(headingLabel,
new Font(helvetica, fontSize, Font.NORMAL, new BaseColor(0, 0, 0)));
textWidth = ColumnText.getWidth(heading);
}
heading.setAlignment(Element.ALIGN_CENTER);
PdfPCell titleCell = new PdfPCell();
titleCell.setHorizontalAlignment(Element.ALIGN_CENTER);
titleCell.setVerticalAlignment(Element.ALIGN_TOP);
titleCell.addElement(heading);
titleCell.setFixedHeight(65f);
headerTable.addCell(titleCell);
ALIGN_MIDDLE has integer value 5 defined in the the iText code. Please pay attention while you are writing ALIGN_MIDDLE a tip comes up "Possible value for vertical element." It means if your element is in vertical orientation then it will work as it calculates the center of the element. My suggestion is to replace ALIGN_MIDDLE with ALIGN_CENTER so your code will look like:
cell.setVerticalAlignment(Element.ALIGN_CENTER);
Try this:
PdfPCell cell = new PdfPCell(new Phrase(value, fontValueNew));
cell.setBorder(o);
cell.setBackgroundColor(new Color(233,232,232));
cell.setHorizontalAlignment(Element.ALIGN_LEFT);
cell.setVerticalAlignment(Element.ALIGN_CENTER);
I have my image (for the sake of explaining, lets call it Image.png) and I'm trying to get it to scale to properly fit in my Bodies I have drawn. The bodies and everything work with the debug but I'm not a fan of it.. I'm using a SpriteBatch to draw the background image onto the screen(it would be nice to scale that too). How would I scaleImage.png to the same size/position as a Dynamic body that has been rendered?
EDIT:
While drawing the images, I cant get them to match up with the debug render Bodies..
Creating Body:
BodyDef bodydef2 = new BodyDef();
bodydef2.type = BodyType.DynamicBody;
bodydef2.position.set(camera.viewportWidth + 30.0f, (int)(Math.random()*camera.viewportHeight)%(LastPlatformY+5)+20);
//System.out.println(bodydef2.position.y + " " + LastPlatformY);
Body block = world.createBody(bodydef2);
PolygonShape Shape2 = new PolygonShape();
Shape2.setAsBox(750*WORLD_TO_BOX, 200*WORLD_TO_BOX);
FixtureDef fixtureDef2 = new FixtureDef();
fixtureDef2.shape = Shape2;
fixtureDef2.density = 1000.0f;
fixtureDef2.friction = 0.0f;
fixtureDef2.restitution = 0;
block.setLinearVelocity(new Vector2((float) (Platform_Velocity*-1), 0));
block.createFixture(fixtureDef2);
//Lock 'block' to X-Axis, Relative to floor.
PrismaticJointDef jointDef = new PrismaticJointDef();
jointDef.collideConnected = true;
jointDef.initialize(block, groundBody, block.getWorldCenter(), new Vector2(1, 0));
world.createJoint(jointDef);
Platforms.add(block);
Platforms_Created++;
LastPlatformY = (int)bodydef2.position.y;
Drawing Image:
sp.draw(platforms, (float)(Platforms.get(i).getPosition().x), (float)(Platforms.get(i).getPosition().y), 75,20);
EDIT #2:
turns out that if your camera is smaller than the size of your screen you have to do some compensation to account for that variation in positions.. Problem solved, thanks!
Just save the size of your body in two variables while creating your body and then call the appropriate draw method.
To get the position of your object call body.getPosition().
For example
Texture t = assetManager.get("your texture", Texture.class);
BodyDef bodyDef = new BodyDef();
body.type = BodyType.DynamicBody
float width = 64 * WORLD_TO_BOX;
float height = 64 * WORLD_TO_BOX;
Shape shape = new PolygonShape();
float[] points = new float[]{0,0,width,0,width,height,0, height};
shape.set(points);
FixtureDef def = new FixtureDef();
def.shape = shape;
...
body.createFixture(def);
shape.dispose();
And later when you want to draw
public void render(Spritebatch batch) {
batch.draw(t, body.getPosition().x * BOX_TO_WORLD, body.getPosition().y * BOX_TO_WORLD, width * BOX_TO_WORLD, height * BOX_TO_WORLD);
}