Example usage for com.itextpdf.text.pdf.parser Path replaceCloseWithLine

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf.parser Path replaceCloseWithLine.

Prototype

public List<Integer> replaceCloseWithLine() 

Source Link

Document

Adds additional line to each closed subpath and makes the subpath unclosed.

Usage

From source file:mkl.testarea.itext5.pdfcleanup.PdfCleanUpRegionFilter.java

License:Open Source License

private static Path applyDashPattern(Path path, LineDashPattern lineDashPattern) {
    Set<Integer> modifiedSubpaths = new HashSet<Integer>(path.replaceCloseWithLine());
    Path dashedPath = new Path();
    int currentSubpath = 0;

    for (Subpath subpath : path.getSubpaths()) {
        List<Point2D> subpathApprox = subpath.getPiecewiseLinearApproximation();

        if (subpathApprox.size() > 1) {
            dashedPath.moveTo((float) subpathApprox.get(0).getX(), (float) subpathApprox.get(0).getY());
            float remainingDist = 0;
            boolean remainingIsGap = false;

            for (int i = 1; i < subpathApprox.size(); ++i) {
                Point2D nextPoint = null;

                if (remainingDist != 0) {
                    nextPoint = getNextPoint(subpathApprox.get(i - 1), subpathApprox.get(i), remainingDist);
                    remainingDist = applyDash(dashedPath, subpathApprox.get(i - 1), subpathApprox.get(i),
                            nextPoint, remainingIsGap);
                }//from  w w  w .  j a  v a 2 s .com

                while (Float.compare(remainingDist, 0) == 0
                        && !dashedPath.getCurrentPoint().equals(subpathApprox.get(i))) {
                    LineDashPattern.DashArrayElem currentElem = lineDashPattern.next();
                    nextPoint = getNextPoint(nextPoint != null ? nextPoint : subpathApprox.get(i - 1),
                            subpathApprox.get(i), currentElem.getVal());
                    remainingDist = applyDash(dashedPath, subpathApprox.get(i - 1), subpathApprox.get(i),
                            nextPoint, currentElem.isGap());
                    remainingIsGap = currentElem.isGap();
                }
            }

            // If true, then the line closing the subpath was explicitly added (see Path.ReplaceCloseWithLine).
            // This causes a loss of a visual effect of line join style parameter, so in this clause
            // we simply add overlapping dash (or gap, no matter), which continues the last dash and equals to
            // the first dash (or gap) of the path.
            if (modifiedSubpaths.contains(currentSubpath)) {
                lineDashPattern.reset();
                LineDashPattern.DashArrayElem currentElem = lineDashPattern.next();
                Point2D nextPoint = getNextPoint(subpathApprox.get(0), subpathApprox.get(1),
                        currentElem.getVal());
                applyDash(dashedPath, subpathApprox.get(0), subpathApprox.get(1), nextPoint,
                        currentElem.isGap());
            }
        }

        // According to PDF spec. line dash pattern should be restarted for each new subpath.
        lineDashPattern.reset();
        ++currentSubpath;
    }

    return dashedPath;
}

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