use of org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationStrikeout in project pdfbox by apache.
the class PDStrikeoutAppearanceHandler method generateNormalAppearance.
@Override
public void generateNormalAppearance() {
PDAnnotationStrikeout annotation = (PDAnnotationStrikeout) getAnnotation();
PDRectangle rect = annotation.getRectangle();
float[] pathsArray = annotation.getQuadPoints();
if (pathsArray == null) {
return;
}
AnnotationBorder ab = AnnotationBorder.getAnnotationBorder(annotation, annotation.getBorderStyle());
PDColor color = annotation.getColor();
if (color == null || color.getComponents().length == 0) {
return;
}
if (Float.compare(ab.width, 0) == 0) {
// value found in adobe reader
ab.width = 1.5f;
}
// Adjust rectangle even if not empty, see PLPDF.com-MarkupAnnotations.pdf
// TODO in a class structure this should be overridable
// this is similar to polyline but different data type
float minX = Float.MAX_VALUE;
float minY = Float.MAX_VALUE;
float maxX = Float.MIN_VALUE;
float maxY = Float.MIN_VALUE;
for (int i = 0; i < pathsArray.length / 2; ++i) {
float x = pathsArray[i * 2];
float y = pathsArray[i * 2 + 1];
minX = Math.min(minX, x);
minY = Math.min(minY, y);
maxX = Math.max(maxX, x);
maxY = Math.max(maxY, y);
}
rect.setLowerLeftX(Math.min(minX - ab.width / 2, rect.getLowerLeftX()));
rect.setLowerLeftY(Math.min(minY - ab.width / 2, rect.getLowerLeftY()));
rect.setUpperRightX(Math.max(maxX + ab.width, rect.getUpperRightX()));
rect.setUpperRightY(Math.max(maxY + ab.width, rect.getUpperRightY()));
annotation.setRectangle(rect);
try {
try (PDAppearanceContentStream cs = getNormalAppearanceAsContentStream()) {
handleOpacity(annotation.getConstantOpacity());
cs.setStrokingColor(color);
if (ab.dashArray != null) {
cs.setLineDashPattern(ab.dashArray, 0);
}
cs.setLineWidth(ab.width);
// https://stackoverflow.com/questions/9855814/pdf-spec-vs-acrobat-creation-quadpoints
for (int i = 0; i < pathsArray.length / 8; ++i) {
// get mid point between bounds, substract the line width to approximate what Adobe is doing
// See e.g. CTAN-example-Annotations.pdf and PLPDF.com-MarkupAnnotations.pdf
// and https://bugs.ghostscript.com/show_bug.cgi?id=693664
// do the math for diagonal annotations with this weird old trick:
// https://stackoverflow.com/questions/7740507/extend-a-line-segment-a-specific-distance
float len0 = (float) (Math.sqrt(Math.pow(pathsArray[i * 8] - pathsArray[i * 8 + 4], 2) + Math.pow(pathsArray[i * 8 + 1] - pathsArray[i * 8 + 5], 2)));
float x0 = pathsArray[i * 8 + 4] + (pathsArray[i * 8] - pathsArray[i * 8 + 4]) / len0 * (len0 / 2 - ab.width);
float y0 = pathsArray[i * 8 + 5] + (pathsArray[i * 8 + 1] - pathsArray[i * 8 + 5]) / len0 * (len0 / 2 - ab.width);
float len1 = (float) (Math.sqrt(Math.pow(pathsArray[i * 8 + 2] - pathsArray[i * 8 + 6], 2) + Math.pow(pathsArray[i * 8 + 3] - pathsArray[i * 8 + 7], 2)));
float x1 = pathsArray[i * 8 + 6] + (pathsArray[i * 8 + 2] - pathsArray[i * 8 + 6]) / len1 * (len1 / 2 - ab.width);
float y1 = pathsArray[i * 8 + 7] + (pathsArray[i * 8 + 3] - pathsArray[i * 8 + 7]) / len1 * (len1 / 2 - ab.width);
cs.moveTo(x0, y0);
cs.lineTo(x1, y1);
}
cs.stroke();
}
} catch (IOException ex) {
LOG.error(ex);
}
}
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