simplebookmark.java

处理PDF

        int count = 0;
        for (Iterator it = kids.listIterator(); it.hasNext(); ++ptr) {
            HashMap map = (HashMap)it.next();
            Object lower[] = null;
            List subKid = (List)map.get("Kids");
            if (subKid != null && !subKid.isEmpty())
                lower = iterateOutlines(writer, refs[ptr], subKid, namedAsNames);
            PdfDictionary outline = new PdfDictionary();
            ++count;
            if (lower != null) {
                outline.put(PdfName.FIRST, (PdfIndirectReference)lower[0]);
                outline.put(PdfName.LAST, (PdfIndirectReference)lower[1]);
                int n = ((Integer)lower[2]).intValue();
                if ("false".equals(map.get("Open"))) {
                    outline.put(PdfName.COUNT, new PdfNumber(-n));
                }
                else {
                    outline.put(PdfName.COUNT, new PdfNumber(n));
                    count += n;
                }
            }
            outline.put(PdfName.PARENT, parent);
            if (ptr > 0)
                outline.put(PdfName.PREV, refs[ptr - 1]);
            if (ptr < refs.length - 1)
                outline.put(PdfName.NEXT, refs[ptr + 1]);
            outline.put(PdfName.TITLE, new PdfString((String)map.get("Title"), PdfObject.TEXT_UNICODE));
            String color = (String)map.get("Color");
            if (color != null) {
                try {
                    PdfArray arr = new PdfArray();
                    StringTokenizer tk = new StringTokenizer(color);
                    for (int k = 0; k < 3; ++k) {
                        float f = Float.parseFloat(tk.nextToken());
                        if (f < 0) f = 0;
                        if (f > 1) f = 1;
                        arr.add(new PdfNumber(f));
                    }
                    outline.put(PdfName.C, arr);
                } catch(Exception e){} //in case it's malformed
            }
            String style = (String)map.get("Style");
            if (style != null) {
                style = style.toLowerCase();
                int bits = 0;
                if (style.indexOf("italic") >= 0)
                    bits |= 1;
                if (style.indexOf("bold") >= 0)
                    bits |= 2;
                if (bits != 0)
                    outline.put(PdfName.F, new PdfNumber(bits));
            }
            createOutlineAction(outline, map, writer, namedAsNames);
            writer.addToBody(outline, refs[ptr]);
        }
        return new Object[]{refs[0], refs[refs.length - 1], new Integer(count)};
    }
    
    /**
     * Exports the bookmarks to XML. Only of use if the generation is to be include in
     * some other XML document.
     * @param list the bookmarks
     * @param out the export destination. The writer is not closed
     * @param indent the indentation level. Pretty printing significant only
     * @param onlyASCII codes above 127 will always be escaped with &amp;#nn; if <CODE>true</CODE>,
     * whatever the encoding
     * @throws IOException on error
     */
    public static void exportToXMLNode(List list, Writer out, int indent, boolean onlyASCII) throws IOException {
        String dep = "";
        for (int k = 0; k < indent; ++k)
            dep += "  ";
        for (Iterator it = list.iterator(); it.hasNext();) {
            HashMap map = (HashMap)it.next();
            String title = null;
            out.write(dep);
            out.write("<Title ");
            List kids = null;
            for (Iterator e = map.entrySet().iterator(); e.hasNext();) {
                Map.Entry entry = (Map.Entry) e.next();
                String key = (String) entry.getKey();
                if (key.equals("Title")) {
                    title = (String) entry.getValue();
                    continue;
                }
                else if (key.equals("Kids")) {
                    kids = (List) entry.getValue();
                    continue;
                }
                else {
                    out.write(key);
                    out.write("=\"");
                    String value = (String) entry.getValue();
                    if (key.equals("Named") || key.equals("NamedN"))
                        value = SimpleNamedDestination.escapeBinaryString(value);
                    out.write(SimpleXMLParser.escapeXML(value, onlyASCII));
                    out.write("\" ");
                }
            }
            out.write(">");
            if (title == null)
                title = "";
            out.write(SimpleXMLParser.escapeXML(title, onlyASCII));
            if (kids != null) {
                out.write("\n");
                exportToXMLNode(kids, out, indent + 1, onlyASCII);
                out.write(dep);
            }
            out.write("</Title>\n");
        }
    }
    
    /**
     * Exports the bookmarks to XML. The DTD for this XML is:
     * <p>
     * <pre>
     * &lt;?xml version='1.0' encoding='UTF-8'?&gt;
     * &lt;!ELEMENT Title (#PCDATA|Title)*&gt;
     * &lt;!ATTLIST Title
     *    Action CDATA #IMPLIED
     *    Open CDATA #IMPLIED
     *    Page CDATA #IMPLIED
     *    URI CDATA #IMPLIED
     *    File CDATA #IMPLIED
     *    Named CDATA #IMPLIED
     *    NamedN CDATA #IMPLIED
     *    NewWindow CDATA #IMPLIED
     *    Style CDATA #IMPLIED
     *    Color CDATA #IMPLIED
     * &gt;
     * &lt;!ELEMENT Bookmark (Title)*&gt;
     * </pre>
     * @param list the bookmarks
     * @param out the export destination. The stream is not closed
     * @param encoding the encoding according to IANA conventions
     * @param onlyASCII codes above 127 will always be escaped with &amp;#nn; if <CODE>true</CODE>,
     * whatever the encoding
     * @throws IOException on error
     */    
    public static void exportToXML(List list, OutputStream out, String encoding, boolean onlyASCII) throws IOException {
        String jenc = IanaEncodings.getJavaEncoding(encoding);
        Writer wrt = new BufferedWriter(new OutputStreamWriter(out, jenc));
        exportToXML(list, wrt, encoding, onlyASCII);
    }
    
    /**
     * Exports the bookmarks to XML.
     * @param list the bookmarks
     * @param wrt the export destination. The writer is not closed
     * @param encoding the encoding according to IANA conventions
     * @param onlyASCII codes above 127 will always be escaped with &amp;#nn; if <CODE>true</CODE>,
     * whatever the encoding
     * @throws IOException on error
     */
    public static void exportToXML(List list, Writer wrt, String encoding, boolean onlyASCII) throws IOException {
        wrt.write("<?xml version=\"1.0\" encoding=\"");
        wrt.write(SimpleXMLParser.escapeXML(encoding, onlyASCII));
        wrt.write("\"?>\n<Bookmark>\n");
        exportToXMLNode(list, wrt, 1, onlyASCII);
        wrt.write("</Bookmark>\n");
        wrt.flush();
    }
    
    /**
     * Import the bookmarks from XML.
     * @param in the XML source. The stream is not closed
     * @throws IOException on error
     * @return the bookmarks
     */    
    public static List importFromXML(InputStream in) throws IOException {
        SimpleBookmark book = new SimpleBookmark();
        SimpleXMLParser.parse(book, in);
        return book.topList;
    }
    
    /**
     * Import the bookmarks from XML.
     * @param in the XML source. The reader is not closed
     * @throws IOException on error
     * @return the bookmarks
     */
    public static List importFromXML(Reader in) throws IOException {
        SimpleBookmark book = new SimpleBookmark();
        SimpleXMLParser.parse(book, in);
        return book.topList;
    }
    
    public void endDocument() {
    }
    
    public void endElement(String tag) {
        if (tag.equals("Bookmark")) {
            if (attr.isEmpty())
                return;
            else
                throw new RuntimeException("Bookmark end tag out of place.");
        }
        if (!tag.equals("Title"))
            throw new RuntimeException("Invalid end tag - " + tag);
        HashMap attributes = (HashMap)attr.pop();
        String title = (String)attributes.get("Title");
        attributes.put("Title",  title.trim());
        String named = (String)attributes.get("Named");
        if (named != null)
            attributes.put("Named", SimpleNamedDestination.unEscapeBinaryString(named));
        named = (String)attributes.get("NamedN");
        if (named != null)
            attributes.put("NamedN", SimpleNamedDestination.unEscapeBinaryString(named));
        if (attr.isEmpty())
            topList.add(attributes);
        else {
            HashMap parent = (HashMap)attr.peek();
            List kids = (List)parent.get("Kids");
            if (kids == null) {
                kids = new ArrayList();
                parent.put("Kids", kids);
            }
            kids.add(attributes);
        }
    }
    
    public void startDocument() {
    }
    
    public void startElement(String tag, HashMap h) {
        if (topList == null) {
            if (tag.equals("Bookmark")) {
                topList = new ArrayList();
                return;
            }
            else
                throw new RuntimeException("Root element is not Bookmark: " + tag);
        }
        if (!tag.equals("Title"))
            throw new RuntimeException("Tag " + tag + " not allowed.");
        HashMap attributes = new HashMap(h);
        attributes.put("Title", "");
        attributes.remove("Kids");
        attr.push(attributes);
    }
    
    public void text(String str) {
        if (attr.isEmpty())
            return;
        HashMap attributes = (HashMap)attr.peek();
        String title = (String)attributes.get("Title");
        title += str;
        attributes.put("Title", title);
    }    
}