pdfannotation.java

处理PDF

        used = true;
    }
    
    public HashMap getTemplates() {
        return templates;
    }
    
    /** Getter for property form.
     * @return Value of property form.
     */
    public boolean isForm() {
        return form;
    }
    
    /** Getter for property annotation.
     * @return Value of property annotation.
     */
    public boolean isAnnotation() {
        return annotation;
    }
    
    public void setPage(int page) {
        put(PdfName.P, writer.getPageReference(page));
    }
    
    public void setPage() {
        put(PdfName.P, writer.getCurrentPage());
    }
    
    /** Getter for property placeInPage.
     * @return Value of property placeInPage.
     */
    public int getPlaceInPage() {
        return placeInPage;
    }
    
    /** Places the annotation in a specified page that must be greater
     * or equal to the current one. With <code>PdfStamper</code> the page
     * can be any. The first page is 1.
     * @param placeInPage New value of property placeInPage.
     */
    public void setPlaceInPage(int placeInPage) {
        this.placeInPage = placeInPage;
    }
    
    public void setRotate(int v) {
        put(PdfName.ROTATE, new PdfNumber(v));
    }
    
    PdfDictionary getMK() {
        PdfDictionary mk = (PdfDictionary)get(PdfName.MK);
        if (mk == null) {
            mk = new PdfDictionary();
            put(PdfName.MK, mk);
        }
        return mk;
    }
    
    public void setMKRotation(int rotation) {
        getMK().put(PdfName.R, new PdfNumber(rotation));
    }
    
    public static PdfArray getMKColor(Color color) {
        PdfArray array = new PdfArray();
        int type = ExtendedColor.getType(color);
        switch (type) {
            case ExtendedColor.TYPE_GRAY: {
                array.add(new PdfNumber(((GrayColor)color).getGray()));
                break;
            }
            case ExtendedColor.TYPE_CMYK: {
                CMYKColor cmyk = (CMYKColor)color;
                array.add(new PdfNumber(cmyk.getCyan()));
                array.add(new PdfNumber(cmyk.getMagenta()));
                array.add(new PdfNumber(cmyk.getYellow()));
                array.add(new PdfNumber(cmyk.getBlack()));
                break;
            }
            case ExtendedColor.TYPE_SEPARATION:
            case ExtendedColor.TYPE_PATTERN:
            case ExtendedColor.TYPE_SHADING:
                throw new RuntimeException("Separations, patterns and shadings are not allowed in MK dictionary.");
            default:
                array.add(new PdfNumber(color.getRed() / 255f));
                array.add(new PdfNumber(color.getGreen() / 255f));
                array.add(new PdfNumber(color.getBlue() / 255f));
        }
        return array;
    }
    
    public void setMKBorderColor(Color color) {
        if (color == null)
            getMK().remove(PdfName.BC);
        else
            getMK().put(PdfName.BC, getMKColor(color));
    }
    
    public void setMKBackgroundColor(Color color) {
        if (color == null)
            getMK().remove(PdfName.BG);
        else
            getMK().put(PdfName.BG, getMKColor(color));
    }
    
    public void setMKNormalCaption(String caption) {
        getMK().put(PdfName.CA, new PdfString(caption, PdfObject.TEXT_UNICODE));
    }
    
    public void setMKRolloverCaption(String caption) {
        getMK().put(PdfName.RC, new PdfString(caption, PdfObject.TEXT_UNICODE));
    }
    
    public void setMKAlternateCaption(String caption) {
        getMK().put(PdfName.AC, new PdfString(caption, PdfObject.TEXT_UNICODE));
    }
    
    public void setMKNormalIcon(PdfTemplate template) {
        getMK().put(PdfName.I, template.getIndirectReference());
    }
    
    public void setMKRolloverIcon(PdfTemplate template) {
        getMK().put(PdfName.RI, template.getIndirectReference());
    }
    
    public void setMKAlternateIcon(PdfTemplate template) {
        getMK().put(PdfName.IX, template.getIndirectReference());
    }
    
    public void setMKIconFit(PdfName scale, PdfName scalingType, float leftoverLeft, float leftoverBottom, boolean fitInBounds) {
        PdfDictionary dic = new PdfDictionary();
        if (!scale.equals(PdfName.A))
            dic.put(PdfName.SW, scale);
        if (!scalingType.equals(PdfName.P))
            dic.put(PdfName.S, scalingType);
        if (leftoverLeft != 0.5f || leftoverBottom != 0.5f) {
            PdfArray array = new PdfArray(new PdfNumber(leftoverLeft));
            array.add(new PdfNumber(leftoverBottom));
            dic.put(PdfName.A, array);
        }
        if (fitInBounds)
            dic.put(PdfName.FB, PdfBoolean.PDFTRUE);
        getMK().put(PdfName.IF, dic);
    }
    
    public void setMKTextPosition(int tp) {
        getMK().put(PdfName.TP, new PdfNumber(tp));
    }
    
    /**
     * Sets the layer this annotation belongs to.
     * @param layer the layer this annotation belongs to
     */    
    public void setLayer(PdfOCG layer) {
        put(PdfName.OC, layer.getRef());
    }
    
    /**
     * Sets the name of the annotation.
     * With this name the annotation can be identified among
     * all the annotations on a page (it has to be unique).
     */
    public void setName(String name) {
    	put(PdfName.NM, new PdfString(name));
    }
    
    /**
     * This class processes links from imported pages so that they may be active. The following example code reads a group
     * of files and places them all on the output PDF, four pages in a single page, keeping the links active.
     * <pre>
     * String[] files = new String[] {&quot;input1.pdf&quot;, &quot;input2.pdf&quot;};
     * String outputFile = &quot;output.pdf&quot;;
     * int firstPage=1;
     * Document document = new Document();
     * PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(outputFile));
     * document.setPageSize(PageSize.A4);
     * float W = PageSize.A4.getWidth() / 2;
     * float H = PageSize.A4.getHeight() / 2;
     * document.open();
     * PdfContentByte cb = writer.getDirectContent();
     * for (int i = 0; i &lt; files.length; i++) {
     *    PdfReader currentReader = new PdfReader(files[i]);
     *    currentReader.consolidateNamedDestinations();
     *    for (int page = 1; page &lt;= currentReader.getNumberOfPages(); page++) {
     *        PdfImportedPage importedPage = writer.getImportedPage(currentReader, page);
     *        float a = 0.5f;
     *        float e = (page % 2 == 0) ? W : 0;
     *        float f = (page % 4 == 1 || page % 4 == 2) ? H : 0;
     *        ArrayList links = currentReader.getLinks(page);
     *        cb.addTemplate(importedPage, a, 0, 0, a, e, f);
     *        for (int j = 0; j &lt; links.size(); j++) {
     *            PdfAnnotation.PdfImportedLink link = (PdfAnnotation.PdfImportedLink)links.get(j);
     *            if (link.isInternal()) {
     *                int dPage = link.getDestinationPage();
     *                int newDestPage = (dPage-1)/4 + firstPage;
     *                float ee = (dPage % 2 == 0) ? W : 0;
     *                float ff = (dPage % 4 == 1 || dPage % 4 == 2) ? H : 0;
     *                link.setDestinationPage(newDestPage);
     *                link.transformDestination(a, 0, 0, a, ee, ff);
     *            }
     *            link.transformRect(a, 0, 0, a, e, f);
     *            writer.addAnnotation(link.createAnnotation(writer));
     *        }
     *        if (page % 4 == 0)
     *        document.newPage();
     *    }
     *    if (i &lt; files.length - 1)
     *    document.newPage();
     *    firstPage += (currentReader.getNumberOfPages()+3)/4;
     * }
     * document.close();
     * </pre>
     */
    public static class PdfImportedLink {
    	float llx, lly, urx, ury;
    	HashMap parameters = new HashMap();
    	PdfArray destination = null;
    	int newPage=0;
    	
    	PdfImportedLink(PdfDictionary annotation) {
    		parameters.putAll(annotation.hashMap);
    		try {
    			destination = (PdfArray) parameters.remove(PdfName.DEST);
    		} catch (ClassCastException ex) {
    			throw new IllegalArgumentException("You have to consolidate the named destinations of your reader.");
    		}
    		if (destination != null) {
    			destination = new PdfArray(destination);
    		}
        	PdfArray rc = (PdfArray) parameters.remove(PdfName.RECT);
        	llx = rc.getAsNumber(0).floatValue();
    		lly = rc.getAsNumber(1).floatValue();
        	urx = rc.getAsNumber(2).floatValue();
    		ury = rc.getAsNumber(3).floatValue();
    	}
    	
    	public boolean isInternal() {
    		return destination != null;
    	}
    	
    	public int getDestinationPage() {
    		if (!isInternal()) return 0;
    		
    		// here destination is something like
    		// [132 0 R, /XYZ, 29.3898, 731.864502, null]
    		PdfIndirectReference ref = destination.getAsIndirectObject(0);
    		
    		PRIndirectReference pr = (PRIndirectReference) ref;
    		PdfReader r = pr.getReader();
    		for (int i = 1; i <= r.getNumberOfPages(); i++) {
    			PRIndirectReference pp = r.getPageOrigRef(i);
    			if (pp.getGeneration() == pr.getGeneration() && pp.getNumber() == pr.getNumber()) return i;
    		}
    		throw new IllegalArgumentException("Page not found.");
    	}
    	
    	public void setDestinationPage(int newPage) {
    		if (!isInternal()) throw new IllegalArgumentException("Cannot change destination of external link");
    		this.newPage=newPage;
    	}
    	
    	public void transformDestination(float a, float b, float c, float d, float e, float f) {
    		if (!isInternal()) throw new IllegalArgumentException("Cannot change destination of external link");
    		if (destination.getAsName(1).equals(PdfName.XYZ)) {
    			float x = destination.getAsNumber(2).floatValue();
    			float y = destination.getAsNumber(3).floatValue();
        		float xx = x * a + y * c + e;
        		float yy = x * b + y * d + f;
        		destination.getArrayList().set(2, new PdfNumber(xx));
        		destination.getArrayList().set(3, new PdfNumber(yy));
    		}
    	}
    	
    	public void transformRect(float a, float b, float c, float d, float e, float f) {
    		float x = llx * a + lly * c + e;
    		float y = llx * b + lly * d + f;
    		llx = x;
    		lly = y;
    		x = urx * a + ury * c + e;
    		y = urx * b + ury * d + f;
    		urx = x;
    		ury = y;
    	}
    	
    	public PdfAnnotation createAnnotation(PdfWriter writer) {
    		PdfAnnotation annotation = new PdfAnnotation(writer, new Rectangle(llx, lly, urx, ury));
    		if (newPage != 0) {
    	        PdfIndirectReference ref = writer.getPageReference(newPage);
    	        destination.getArrayList().set(0, ref);
    		}
    		if (destination != null) annotation.put(PdfName.DEST, destination);
    		annotation.hashMap.putAll(parameters);
    		return annotation;
    	}
    }
}