de.intarsys.pdf.pd.PDLineAnnotation Maven / Gradle / Ivy

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This is a fork of http://sourceforge.net/projects/jpodlib/ as development seems to be frozen. We're providing some bug fixes along with deployments to maven.

There is a newer version: 2.0

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package de.intarsys.pdf.pd;

import de.intarsys.pdf.cds.CDSRectangle;
import de.intarsys.pdf.cos.COSArray;
import de.intarsys.pdf.cos.COSBasedObject;
import de.intarsys.pdf.cos.COSFixed;
import de.intarsys.pdf.cos.COSName;
import de.intarsys.pdf.cos.COSNumber;
import de.intarsys.pdf.cos.COSObject;

public class PDLineAnnotation extends PDMarkupAnnotation {

    /**
     * The meta class implementation
     */
    public static class MetaClass extends PDMarkupAnnotation.MetaClass {
        protected MetaClass(Class instanceClass) {
            super(instanceClass);
        }

        @Override
        protected COSBasedObject doCreateCOSBasedObject(COSObject object) {
            return new PDLineAnnotation(object);
        }
    }

    /**
     * The meta class instance
     */
    public static final MetaClass META = new MetaClass(MetaClass.class.getDeclaringClass());

    public PDLineAnnotation(COSObject object) {
        super(object);
    }

    @Override
    protected COSName cosGetExpectedSubtype() {
        return PDMarkupAnnotation.CN_Subtype_Line;
    }

    @Override
    public float getMinHeight() {
        return getBorderStyleWidth();
    }

    @Override
    public float getMinWidth() {
        return getBorderStyleWidth();
    }

    @Override
    protected void updateStateRectangle(CDSRectangle oldRectangle, CDSRectangle newRectangle) {
        COSArray line = cosGetField(PDMarkupAnnotation.DK_L).asArray();
        if (line == null) {
            return;
        }
        // get old rectangle for scaling
        double oldX = oldRectangle.getLowerLeftX();
        double oldY = oldRectangle.getLowerLeftY();
        double oldWidth = oldRectangle.getWidth();
        double oldHeight = oldRectangle.getHeight();
        double dX = newRectangle.getLowerLeftX() - oldX;
        double dY = newRectangle.getLowerLeftY() - oldY;
        double fX = newRectangle.getWidth() / oldWidth;
        double fY = newRectangle.getHeight() / oldHeight;
        // scale
        COSArray newLine = COSArray.create();
        cosSetField(PDMarkupAnnotation.DK_L, newLine);
        COSNumber cosX = (COSNumber) line.get(0);
        COSNumber cosY = (COSNumber) line.get(1);
        float x = cosX.floatValue();
        float y = cosY.floatValue();
        newLine.add(COSFixed.create((float) ((x - oldX) * fX + oldX + dX)));
        newLine.add(COSFixed.create((float) ((y - oldY) * fY + oldY + dY)));
        cosX = (COSNumber) line.get(2);
        cosY = (COSNumber) line.get(3);
        x = cosX.floatValue();
        y = cosY.floatValue();
        newLine.add(COSFixed.create((float) ((x - oldX) * fX + oldX + dX)));
        newLine.add(COSFixed.create((float) ((y - oldY) * fY + oldY + dY)));
    }
}