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Open Source (LGPL) JavaFX PDF Viewer for NetBeans plugin
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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
 @LICENSE@
 *
 * ---------------
 * FormsCSSHelper.java
 * ---------------
 */

package org.jpedal.objects.acroforms.utils;

import java.awt.Color;
import java.awt.Rectangle;

import org.jpedal.objects.PdfPageData;
import org.jpedal.objects.acroforms.GUIData;
import org.jpedal.objects.raw.FormObject;
import org.jpedal.objects.raw.PdfDictionary;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.render.output.FontMapper;
import org.jpedal.render.output.GenericFontMapper;

/**
 * Methods to create attribute values to share between JavaFX and CSS
 *
 * @author Simon
 */
public class FormsCSSHelper {

    /**
     * Gets text color as RGB
     *
     * @param object
     * @return int[]{R,G,B}
     */
    public static int[] getTextColor(final FormObject object) {
        final int[] rgb;
        if (object != null) {
            rgb = getColor(object.getTextColor());
        } else {
            rgb = null;
        }

        return rgb;
    }

    /**
     * Gets background color as RGB
     *
     * @param object
     * @return int[]{R,G,B}
     */
    public static int[] getBackgroundColor(final FormObject object) {
        final int[] rgb;
        if (object != null) {
            rgb = getColor(FormObject.generateColor(object.getDictionary(PdfDictionary.MK).getFloatArray(PdfDictionary.BG)));
        } else {
            rgb = null;
        }
        return rgb;
    }

    /**
     * Gets border color as RGB
     *
     * @param object
     * @return int[]{R,G,B}
     */
    public static int[] getBorderColor(final FormObject object) {
        final int[] rgb;
        if (object != null) {
            rgb = getColor(FormObject.generateColor(object.getDictionary(PdfDictionary.MK).getFloatArray(PdfDictionary.BC)));
        } else {
            rgb = null;
        }
        return rgb;
    }

    public static int getBorderWidth(final FormObject object) {
        final PdfObject BS = object.getDictionary(PdfDictionary.BS);

        int w = -1;
        if (BS != null) {
            w = BS.getInt(PdfDictionary.W);
        }
        if (w < 0) {
            w = 1;
        }

        return w;
    }

    private static int[] getColor(final Color color) {
        final int[] rgb;

        if (color != null) {
            final int col = color.getRGB();
            final int r = (col >> 16) & 255;
            final int g = (col >> 8) & 255;
            final int b = col & 255;
            rgb = new int[]{r, g, b};
        } else {
            rgb = null;
        }

        return rgb;
    }

    /**
     * Sets up the font CSS value as "[Weight] [Size] [family]"
     *
     * @param formObject
     * @param area
     * @param isMultiLine
     * @param pageData
     * @param pageNum
     * @param scaling
     * @return
     */
    public static String addFont(final FormObject formObject, final boolean area, final boolean isMultiLine, final PdfPageData pageData, final int pageNum, final float scaling) {
        final String fontString;
        final FontMapper fontMapper = new GenericFontMapper(formObject.getFontName());

        final String font = fontMapper.getFont();
        final String weight = fontMapper.getWeight();

        float size = formObject.getTextSize();
        if (size == 0 || size == -1) {
            final Rectangle pos = formObject.getBoundingRectangle();

            if (isMultiLine) {
                size = 12;
                //rows= (int) (pos.height/size);
                //  System.out.println(rows+" "+pos.height);
            } else {
                final int rotation = pageData.getRotation(pageNum);
                if (rotation == 90 || rotation == 270) {
                    size = GUIData.calculateFontSize(pos.width, pos.height, area, formObject.getTextStreamValue(PdfDictionary.V));
                } else {
                    size = GUIData.calculateFontSize(pos.height, pos.width, area, formObject.getTextStreamValue(PdfDictionary.V));
                }
            }
        }

        //Removed as it made text smaller than it should be
        //if issue with text to large add this back in
        //factor in any pge scaling
        //float scaling=output.getScaling(); ///1.33f; //we need to divide by 1.33 to offset scaling on rest

        size *= scaling;

        fontString = String.format("%s %dpx %s", weight, (int) size, font);

        return fontString;
    }
}