simplebookmark.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

	 * (Contributed by Kazuya Ujihara)
	 * @param indirect 
	 * 2004-06-13
	 */
	private static int getNumber(PdfIndirectReference indirect)
	{
		PdfDictionary pdfObj = (PdfDictionary)PdfReader.getPdfObjectRelease(indirect);
		if (pdfObj.contains(PdfName.TYPE) && pdfObj.get(PdfName.TYPE).equals(PdfName.PAGES) && pdfObj.contains(PdfName.KIDS)) 
		{
			PdfArray kids = (PdfArray)pdfObj.get(PdfName.KIDS);
			indirect = (PdfIndirectReference)kids.arrayList.get(0);
		}
		return indirect.getNumber();
	}
    
    /**
     * Gets a <CODE>List</CODE> with the bookmarks. It returns <CODE>null</CODE> if
     * the document doesn't have any bookmarks.
     * @param reader the document
     * @return a <CODE>List</CODE> with the bookmarks or <CODE>null</CODE> if the
     * document doesn't have any
     */    
    public static List getBookmark(PdfReader reader) {
        PdfDictionary catalog = reader.getCatalog();
        PdfObject obj = PdfReader.getPdfObjectRelease(catalog.get(PdfName.OUTLINES));
        if (obj == null || !obj.isDictionary())
            return null;
        PdfDictionary outlines = (PdfDictionary)obj;
        IntHashtable pages = new IntHashtable();
        int numPages = reader.getNumberOfPages();
        for (int k = 1; k <= numPages; ++k) {
            pages.put(reader.getPageOrigRef(k).getNumber(), k);
            reader.releasePage(k);
        }
        return bookmarkDepth(reader, (PdfDictionary)PdfReader.getPdfObjectRelease(outlines.get(PdfName.FIRST)), pages);
    }
    
    /**
     * Removes the bookmark entries for a number of page ranges. The page ranges
     * consists of a number of pairs with the start/end page range. The page numbers
     * are inclusive.
     * @param list the bookmarks
     * @param pageRange the page ranges, always in pairs.
     */    
    public static void eliminatePages(List list, int pageRange[]) {
        if (list == null)
            return;
        for (Iterator it = list.listIterator(); it.hasNext();) {
            HashMap map = (HashMap)it.next();
            boolean hit = false;
            if ("GoTo".equals(map.get("Action"))) {
                String page = (String)map.get("Page");
                if (page != null) {
                    page = page.trim();
                    int idx = page.indexOf(' ');
                    int pageNum;
                    if (idx < 0)
                        pageNum = Integer.parseInt(page);
                    else
                        pageNum = Integer.parseInt(page.substring(0, idx));
                    int len = pageRange.length & 0xfffffffe;
                    for (int k = 0; k < len; k += 2) {
                        if (pageNum >= pageRange[k] && pageNum <= pageRange[k + 1]) {
                            hit = true;
                            break;
                        }
                    }
                }
            }
            List kids = (List)map.get("Kids");
            if (kids != null) {
                eliminatePages(kids, pageRange);
                if (kids.isEmpty()) {
                    map.remove("Kids");
                    kids = null;
                }
            }
            if (hit) {
                if (kids == null)
                    it.remove();
                else {
                    map.remove("Action");
                    map.remove("Page");
                    map.remove("Named");
                }
            }
        }
    }
    
    /**
     * For the pages in range add the <CODE>pageShift</CODE> to the page number.
     * The page ranges
     * consists of a number of pairs with the start/end page range. The page numbers
     * are inclusive.
     * @param list the bookmarks
     * @param pageShift the number to add to the pages in range
     * @param pageRange the page ranges, always in pairs. It can be <CODE>null</CODE>
     * to include all the pages
     */    
    public static void shiftPageNumbers(List list, int pageShift, int pageRange[]) {
        if (list == null)
            return;
        for (Iterator it = list.listIterator(); it.hasNext();) {
            HashMap map = (HashMap)it.next();
            if ("GoTo".equals(map.get("Action"))) {
                String page = (String)map.get("Page");
                if (page != null) {
                    page = page.trim();
                    int idx = page.indexOf(' ');
                    int pageNum;
                    if (idx < 0)
                        pageNum = Integer.parseInt(page);
                    else
                        pageNum = Integer.parseInt(page.substring(0, idx));
                    boolean hit = false;
                    if (pageRange == null)
                        hit = true;
                    else {
                        int len = pageRange.length & 0xfffffffe;
                        for (int k = 0; k < len; k += 2) {
                            if (pageNum >= pageRange[k] && pageNum <= pageRange[k + 1]) {
                                hit = true;
                                break;
                            }
                        }
                    }
                    if (hit) {
                        if (idx < 0)
                            page = Integer.toString(pageNum + pageShift);
                        else
                            page = (pageNum + pageShift) + page.substring(idx);
                    }
                    map.put("Page", page);
                }
            }
            List kids = (List)map.get("Kids");
            if (kids != null)
                shiftPageNumbers(kids, pageShift, pageRange);
        }
    }
    
    static void createOutlineAction(PdfDictionary outline, HashMap map, PdfWriter writer, boolean namedAsNames) {
        try {
            String action = (String)map.get("Action");
            if ("GoTo".equals(action)) {
                String p;
                if ((p = (String)map.get("Named")) != null) {
                    if (namedAsNames)
                        outline.put(PdfName.DEST, new PdfName(p));
                    else
                        outline.put(PdfName.DEST, new PdfString(p, null));
                }
                else if ((p = (String)map.get("Page")) != null) {
                    PdfArray ar = new PdfArray();
                    StringTokenizer tk = new StringTokenizer(p);
                    int n = Integer.parseInt(tk.nextToken());
                    ar.add(writer.getPageReference(n));
                    if (!tk.hasMoreTokens()) {
                        ar.add(PdfName.XYZ);
                        ar.add(new float[]{0, 10000, 0});
                    }
                    else {
                        String fn = tk.nextToken();
                        if (fn.startsWith("/"))
                            fn = fn.substring(1);
                        ar.add(new PdfName(fn));
                        for (int k = 0; k < 4 && tk.hasMoreTokens(); ++k) {
                            fn = tk.nextToken();
                            if (fn.equals("null"))
                                ar.add(PdfNull.PDFNULL);
                            else
                                ar.add(new PdfNumber(fn));
                        }
                    }
                    outline.put(PdfName.DEST, ar);
                }
            }
            else if ("GoToR".equals(action)) {
                String p;
                PdfDictionary dic = new PdfDictionary();
                if ((p = (String)map.get("Named")) != null)
                    dic.put(PdfName.D, new PdfString(p, null));
                else if ((p = (String)map.get("NamedN")) != null)
                    dic.put(PdfName.D, new PdfName(p));
                else if ((p = (String)map.get("Page")) != null){
                    PdfArray ar = new PdfArray();
                    StringTokenizer tk = new StringTokenizer(p);
                    ar.add(new PdfNumber(tk.nextToken()));
                    if (!tk.hasMoreTokens()) {
                        ar.add(PdfName.XYZ);
                        ar.add(new float[]{0, 10000, 0});
                    }
                    else {
                        String fn = tk.nextToken();
                        if (fn.startsWith("/"))
                            fn = fn.substring(1);
                        ar.add(new PdfName(fn));
                        for (int k = 0; k < 4 && tk.hasMoreTokens(); ++k) {
                            fn = tk.nextToken();
                            if (fn.equals("null"))
                                ar.add(PdfNull.PDFNULL);
                            else
                                ar.add(new PdfNumber(fn));
                        }
                    }
                    dic.put(PdfName.D, ar);
                }
                String file = (String)map.get("File");
                if (dic.size() > 0 && file != null) {
                    dic.put(PdfName.S,  PdfName.GOTOR);
                    dic.put(PdfName.F, new PdfString(file));
                    String nw = (String)map.get("NewWindow");
                    if (nw != null) {
                        if (nw.equals("true"))
                            dic.put(PdfName.NEWWINDOW, PdfBoolean.PDFTRUE);
                        else if (nw.equals("false"))
                            dic.put(PdfName.NEWWINDOW, PdfBoolean.PDFFALSE);
                    }
                    outline.put(PdfName.A, dic);
                }
            }
            else if ("URI".equals(action)) {
                String uri = (String)map.get("URI");
                if (uri != null) {
                    PdfDictionary dic = new PdfDictionary();
                    dic.put(PdfName.S, PdfName.URI);
                    dic.put(PdfName.URI, new PdfString(uri));
                    outline.put(PdfName.A, dic);
                }
            }
            else if ("Launch".equals(action)) {
                String file = (String)map.get("File");
                if (file != null) {
                    PdfDictionary dic = new PdfDictionary();
                    dic.put(PdfName.S, PdfName.LAUNCH);
                    dic.put(PdfName.F, new PdfString(file));
                    outline.put(PdfName.A, dic);
                }
            }
        }
        catch (Exception e) {
            // empty on purpose
        }
    }

    public static Object[] iterateOutlines(PdfWriter writer, PdfIndirectReference parent, List kids, boolean namedAsNames) throws IOException {
        PdfIndirectReference refs[] = new PdfIndirectReference[kids.size()];
        for (int k = 0; k < refs.length; ++k)
            refs[k] = writer.getPdfIndirectReference();
        int ptr = 0;
        int count = 0;