org.apache.pdfbox.preflight.font.descriptor.CIDType2DescriptorHelper Maven / Gradle / Ivy

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package org.apache.pdfbox.preflight.font.descriptor;

import static org.apache.pdfbox.preflight.PreflightConstants.ERROR_FONTS_CIDSET_MISSING_FOR_SUBSET;
import static org.apache.pdfbox.preflight.PreflightConstants.ERROR_FONTS_CID_DAMAGED;
import static org.apache.pdfbox.preflight.PreflightConstants.ERROR_FONTS_FONT_FILEX_INVALID;

import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSStream;
import org.apache.pdfbox.pdmodel.common.PDStream;
import org.apache.pdfbox.pdmodel.font.PDFontDescriptor;
import org.apache.pdfbox.pdmodel.font.PDFontLike;
import org.apache.pdfbox.preflight.PreflightContext;
import org.apache.pdfbox.preflight.ValidationResult;
import org.apache.pdfbox.preflight.ValidationResult.ValidationError;
import org.apache.pdfbox.preflight.font.container.CIDType2Container;

public class CIDType2DescriptorHelper extends FontDescriptorHelper
{

    public CIDType2DescriptorHelper(PreflightContext context, PDFontLike font, CIDType2Container fontContainer)
    {
        super(context, font, fontContainer);
    }

    /**
     * If the embedded font is a subset, the CIDSet entry is mandatory and must be a Stream. If the CIDSet entry doesn't
     * respects conditions, the FontContainer is updated.
     * 
     * @param pfDescriptor
     */
    protected void checkCIDSet(PDFontDescriptor pfDescriptor)
    {
        if (isSubSet(pfDescriptor.getFontName()))
        {
            COSBase cidset = pfDescriptor.getCOSObject().getDictionaryObject(COSName.CID_SET);
            if (!(cidset instanceof COSStream))
            {
                this.fContainer.push(new ValidationResult.ValidationError(ERROR_FONTS_CIDSET_MISSING_FOR_SUBSET,
                        pfDescriptor.getFontName() + ": The CIDSet entry is missing for the Composite Subset"));
            }
        }
    }

    @Override
    public PDStream extractFontFile(PDFontDescriptor fontDescriptor)
    {
        PDStream ff2 = fontDescriptor.getFontFile2();
        if (ff2 != null)
        {
            // Stream validation should be done by the StreamValidateHelper. Process font specific check
            COSStream stream = ff2.getCOSObject();
            if (stream == null)
            {
                this.fContainer.push(new ValidationError(ERROR_FONTS_FONT_FILEX_INVALID, 
                        fontDescriptor.getFontName() + ": The FontFile is missing"));
                this.fContainer.notEmbedded();
            }
        }
        checkCIDSet(fontDescriptor);
        return ff2;
    }

    @Override
    protected void processFontFile(PDFontDescriptor fontDescriptor, PDStream fontFile)
    {
        if (font.isDamaged())
        {
            this.fContainer.push(new ValidationError(ERROR_FONTS_CID_DAMAGED, 
                    font.getName() + ": The FontFile can't be read"));
        }
    }
}