pdfstamperimp.java

iText是一个能够快速产生PDF文件的java类库。iText的java类对于那些要产生包含文本

        if (djs.isEmpty())
            return;
        PdfDictionary catalog = reader.getCatalog();
        PdfDictionary names = (PdfDictionary)PdfReader.getPdfObject(catalog.get(PdfName.NAMES), catalog);
        if (names == null) {
            names = new PdfDictionary();
            catalog.put(PdfName.NAMES, names);
            markUsed(catalog);
        }
        markUsed(names);
        String s = String.valueOf(djs.size() - 1);
        int n = s.length();
        String pad = "000000000000000";
        HashMap maptree = new HashMap();
        for (int k = 0; k < djs.size(); ++k) {
            s = String.valueOf(k);
            s = pad.substring(0, n - s.length()) + s;
            maptree.put(s, djs.get(k));
        }
        PdfDictionary tree = PdfNameTree.writeTree(maptree, this);
        names.put(PdfName.JAVASCRIPT, addToBody(tree).getIndirectReference());
    }

    void addFileAttachments() throws IOException {
        HashMap fs = pdf.getDocumentFileAttachment();
        if (fs.isEmpty())
            return;
        PdfDictionary catalog = reader.getCatalog();
        PdfDictionary names = (PdfDictionary)PdfReader.getPdfObject(catalog.get(PdfName.NAMES), catalog);
        if (names == null) {
            names = new PdfDictionary();
            catalog.put(PdfName.NAMES, names);
            markUsed(catalog);
        }
        markUsed(names);
        HashMap old = PdfNameTree.readTree((PdfDictionary)PdfReader.getPdfObjectRelease(names.get(PdfName.EMBEDDEDFILES)));
        for (Iterator it = fs.entrySet().iterator(); it.hasNext();) {
            Map.Entry entry = (Map.Entry) it.next();
            String name = (String) entry.getKey();
            int k = 0;
            String nn = name;
            while (old.containsKey(nn)) {
                ++k;
                nn += " " + k;
            }
            old.put(nn, entry.getValue());
        }
        PdfDictionary tree = PdfNameTree.writeTree(old, this);
        names.put(PdfName.EMBEDDEDFILES, addToBody(tree).getIndirectReference());
    }

    /**
     * Adds or replaces the Collection Dictionary in the Catalog.
     * @param	collection	the new collection dictionary.
     */
    void makePackage( PdfCollection collection ) {
        PdfDictionary catalog = reader.getCatalog();
       	catalog.put( PdfName.COLLECTION, collection );
    }
 
    void setOutlines() throws IOException {
        if (newBookmarks == null)
            return;
        deleteOutlines();
        if (newBookmarks.isEmpty())
            return;
        namedAsNames = (reader.getCatalog().get(PdfName.DESTS) != null);
        PdfDictionary top = new PdfDictionary();
        PdfIndirectReference topRef = getPdfIndirectReference();
        Object kids[] = SimpleBookmark.iterateOutlines(this, topRef, newBookmarks, namedAsNames);
        top.put(PdfName.FIRST, (PdfIndirectReference)kids[0]);
        top.put(PdfName.LAST, (PdfIndirectReference)kids[1]);
        top.put(PdfName.COUNT, new PdfNumber(((Integer)kids[2]).intValue()));
        addToBody(top, topRef);
        reader.getCatalog().put(PdfName.OUTLINES, topRef);
        markUsed(reader.getCatalog());
    }
    
    void setOutlines(List outlines) {
        newBookmarks = outlines;
    }
    
    /**
     * Sets the viewer preferences.
     * @param preferences the viewer preferences
     * @see PdfWriter#setViewerPreferences(int)
     */
    public void setViewerPreferences(int preferences) {
        useVp = true;
        this.viewerPreferences.setViewerPreferences(preferences);
    }
    
    /** Adds a viewer preference
     * @param key a key for a viewer preference
     * @param value the value for the viewer preference
     * @see PdfViewerPreferences#addViewerPreference
     */
    public void addViewerPreference(PdfName key, PdfObject value) {
    	useVp = true;
    	this.viewerPreferences.addViewerPreference(key, value);
    }
    
    /**
     * Set the signature flags.
     * @param f the flags. This flags are ORed with current ones
     */
    public void setSigFlags(int f) {
        sigFlags |= f;
    }
    
    /** Always throws an <code>UnsupportedOperationException</code>.
     * @param actionType ignore
     * @param action ignore
     * @throws PdfException ignore
     * @see PdfStamper#setPageAction(PdfName, PdfAction, int)
     */    
    public void setPageAction(PdfName actionType, PdfAction action) throws PdfException {
        throw new UnsupportedOperationException("Use setPageAction(PdfName actionType, PdfAction action, int page)");
    }

    /**
     * Sets the open and close page additional action.
     * @param actionType the action type. It can be <CODE>PdfWriter.PAGE_OPEN</CODE>
     * or <CODE>PdfWriter.PAGE_CLOSE</CODE>
     * @param action the action to perform
     * @param page the page where the action will be applied. The first page is 1
     * @throws PdfException if the action type is invalid
     */    
    void setPageAction(PdfName actionType, PdfAction action, int page) throws PdfException {
        if (!actionType.equals(PAGE_OPEN) && !actionType.equals(PAGE_CLOSE))
            throw new PdfException("Invalid page additional action type: " + actionType.toString());
        PdfDictionary pg = reader.getPageN(page);
        PdfDictionary aa = (PdfDictionary)PdfReader.getPdfObject(pg.get(PdfName.AA), pg);
        if (aa == null) {
            aa = new PdfDictionary();
            pg.put(PdfName.AA, aa);
            markUsed(pg);
        }
        aa.put(actionType, action);
        markUsed(aa);
    }

    /**
     * Always throws an <code>UnsupportedOperationException</code>.
     * @param seconds ignore
     */
    public void setDuration(int seconds) {
        throw new UnsupportedOperationException("Use setPageAction(PdfName actionType, PdfAction action, int page)");
    }
    
    /**
     * Always throws an <code>UnsupportedOperationException</code>.
     * @param transition ignore
     */
    public void setTransition(PdfTransition transition) {
        throw new UnsupportedOperationException("Use setPageAction(PdfName actionType, PdfAction action, int page)");
    }

    /**
     * Sets the display duration for the page (for presentations)
     * @param seconds   the number of seconds to display the page. A negative value removes the entry
     * @param page the page where the duration will be applied. The first page is 1
     */
    void setDuration(int seconds, int page) {
        PdfDictionary pg = reader.getPageN(page);
        if (seconds < 0)
            pg.remove(PdfName.DUR);
        else
            pg.put(PdfName.DUR, new PdfNumber(seconds));
        markUsed(pg);
    }
    
    /**
     * Sets the transition for the page
     * @param transition   the transition object. A <code>null</code> removes the transition
     * @param page the page where the transition will be applied. The first page is 1
     */
    void setTransition(PdfTransition transition, int page) {
        PdfDictionary pg = reader.getPageN(page);
        if (transition == null)
            pg.remove(PdfName.TRANS);
        else
            pg.put(PdfName.TRANS, transition.getTransitionDictionary());
        markUsed(pg);
    }

    protected void markUsed(PdfObject obj) {
        if (append && obj != null) {
            PRIndirectReference ref = null;
            if (obj.type() == PdfObject.INDIRECT)
                ref = (PRIndirectReference)obj;
            else
                ref = obj.getIndRef();
            if (ref != null)
                marked.put(ref.getNumber(), 1);
        }
    }
    
    protected void markUsed(int num) {
        if (append)
            marked.put(num, 1);
    }
    
    /**
     * Getter for property append.
     * @return Value of property append.
     */
    boolean isAppend() {
        return append;
    }
        
    /** Additional-actions defining the actions to be taken in
     * response to various trigger events affecting the document
     * as a whole. The actions types allowed are: <CODE>DOCUMENT_CLOSE</CODE>,
     * <CODE>WILL_SAVE</CODE>, <CODE>DID_SAVE</CODE>, <CODE>WILL_PRINT</CODE>
     * and <CODE>DID_PRINT</CODE>.
     *
     * @param actionType the action type
     * @param action the action to execute in response to the trigger
     * @throws PdfException on invalid action type
     */
    public void setAdditionalAction(PdfName actionType, PdfAction action) throws PdfException {
        if (!(actionType.equals(DOCUMENT_CLOSE) ||
        actionType.equals(WILL_SAVE) ||
        actionType.equals(DID_SAVE) ||
        actionType.equals(WILL_PRINT) ||
        actionType.equals(DID_PRINT))) {
            throw new PdfException("Invalid additional action type: " + actionType.toString());
        }
        PdfDictionary aa = (PdfDictionary)PdfReader.getPdfObject(reader.getCatalog().get(PdfName.AA));
        if (aa == null) {
            if (action == null)
                return;
            aa = new PdfDictionary();
            reader.getCatalog().put(PdfName.AA, aa);
        }
        markUsed(aa);
        if (action == null)
            aa.remove(actionType);
        else
            aa.put(actionType, action);
    }

    /**
     * @see com.lowagie.text.pdf.PdfWriter#setOpenAction(com.lowagie.text.pdf.PdfAction)
     */
    public void setOpenAction(PdfAction action) {
        openAction = action;
    }
    
    /**
     * @see com.lowagie.text.pdf.PdfWriter#setOpenAction(java.lang.String)
     */
    public void setOpenAction(String name) {
        throw new UnsupportedOperationException("Open actions by name are not supported.");
    }
    
    /**
     * @see com.lowagie.text.pdf.PdfWriter#setThumbnail(com.lowagie.text.Image)
     */
    public void setThumbnail(com.lowagie.text.Image image) {
        throw new UnsupportedOperationException("Use PdfStamper.setThumbnail().");
    }
    
    void setThumbnail(Image image, int page) throws PdfException, DocumentException {
        PdfIndirectReference thumb = getImageReference(addDirectImageSimple(image));
        reader.resetReleasePage();
        PdfDictionary dic = reader.getPageN(page);
        dic.put(PdfName.THUMB, thumb);
        reader.resetReleasePage();
    }

    public PdfContentByte getDirectContentUnder() {
        throw new UnsupportedOperationException("Use PdfStamper.getUnderContent() or PdfStamper.getOverContent()");
    }

    public PdfContentByte getDirectContent() {
        throw new UnsupportedOperationException("Use PdfStamper.getUnderContent() or PdfStamper.getOverContent()");
    }
    
    static class PageStamp {
        
        PdfDictionary pageN;
        StampContent under;
        StampContent over;
        PageResources pageResources;
        
        PageStamp(PdfStamperImp stamper, PdfReader reader, PdfDictionary pageN) {
            this.pageN = pageN;
            pageResources = new PageResources();
            PdfDictionary resources = (PdfDictionary)PdfReader.getPdfObject(pageN.get(PdfName.RESOURCES));
            pageResources.setOriginalResources(resources, stamper.namePtr);
        }
    }
}