cjkfont.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

     * and <CODE>ITALICANGLE</CODE>.
     * @param key the parameter to be extracted
     * @param fontSize the font size in points
     * @return the parameter in points
     */
    public float getFontDescriptor(int key, float fontSize) {
        switch (key) {
            case AWT_ASCENT:
            case ASCENT:
                return getDescNumber("Ascent") * fontSize / 1000;
            case CAPHEIGHT:
                return getDescNumber("CapHeight") * fontSize / 1000;
            case AWT_DESCENT:
            case DESCENT:
                return getDescNumber("Descent") * fontSize / 1000;
            case ITALICANGLE:
                return getDescNumber("ItalicAngle");
            case BBOXLLX:
                return fontSize * getBBox(0) / 1000;
            case BBOXLLY:
                return fontSize * getBBox(1) / 1000;
            case BBOXURX:
                return fontSize * getBBox(2) / 1000;
            case BBOXURY:
                return fontSize * getBBox(3) / 1000;
            case AWT_LEADING:
                return 0;
            case AWT_MAXADVANCE:
                return fontSize * (getBBox(2) - getBBox(0)) / 1000;
        }
        return 0;
    }
    
    public String getPostscriptFontName() {
        return fontName;
    }
    
    /** Gets the full name of the font. If it is a True Type font
     * each array element will have {Platform ID, Platform Encoding ID,
     * Language ID, font name}. The interpretation of this values can be
     * found in the Open Type specification, chapter 2, in the 'name' table.<br>
     * For the other fonts the array has a single element with {"", "", "",
     * font name}.
     * @return the full name of the font
     */
    public String[][] getFullFontName() {
        return new String[][]{{"", "", "", fontName}};
    }
    
    /** Gets the family name of the font. If it is a True Type font
     * each array element will have {Platform ID, Platform Encoding ID,
     * Language ID, font name}. The interpretation of this values can be
     * found in the Open Type specification, chapter 2, in the 'name' table.<br>
     * For the other fonts the array has a single element with {"", "", "",
     * font name}.
     * @return the family name of the font
     */
    public String[][] getFamilyFontName() {
        return getFullFontName();
    }
    
    static char[] readCMap(String name) {
        try {
            name = name + ".cmap";
            InputStream is = getResourceStream(RESOURCE_PATH + name);
            char c[] = new char[0x10000];
            for (int k = 0; k < 0x10000; ++k)
                c[k] = (char)((is.read() << 8) + is.read());
            return c;
        }
        catch (Exception e) {
            // empty on purpose
        }
        return null;
    }
    
    static IntHashtable createMetric(String s) {
        IntHashtable h = new IntHashtable();
        StringTokenizer tk = new StringTokenizer(s);
        while (tk.hasMoreTokens()) {
            int n1 = Integer.parseInt(tk.nextToken());
            h.put(n1, Integer.parseInt(tk.nextToken()));
        }
        return h;
    }
    
    static String convertToHCIDMetrics(int keys[], IntHashtable h) {
        if (keys.length == 0)
            return null;
        int lastCid = 0;
        int lastValue = 0;
        int start;
        for (start = 0; start < keys.length; ++start) {
            lastCid = keys[start];
            lastValue = h.get(lastCid);
            if (lastValue != 0) {
                ++start;
                break;
            }
        }
        if (lastValue == 0)
            return null;
        StringBuffer buf = new StringBuffer();
        buf.append('[');
        buf.append(lastCid);
        int state = FIRST;
        for (int k = start; k < keys.length; ++k) {
            int cid = keys[k];
            int value = h.get(cid);
            if (value == 0)
                continue;
            switch (state) {
                case FIRST: {
                    if (cid == lastCid + 1 && value == lastValue) {
                        state = SERIAL;
                    }
                    else if (cid == lastCid + 1) {
                        state = BRACKET;
                        buf.append('[').append(lastValue);
                    }
                    else {
                        buf.append('[').append(lastValue).append(']').append(cid);
                    }
                    break;
                }
                case BRACKET: {
                    if (cid == lastCid + 1 && value == lastValue) {
                        state = SERIAL;
                        buf.append(']').append(lastCid);
                    }
                    else if (cid == lastCid + 1) {
                        buf.append(' ').append(lastValue);
                    }
                    else {
                        state = FIRST;
                        buf.append(' ').append(lastValue).append(']').append(cid);
                    }
                    break;
                }
                case SERIAL: {
                    if (cid != lastCid + 1 || value != lastValue) {
                        buf.append(' ').append(lastCid).append(' ').append(lastValue).append(' ').append(cid);
                        state = FIRST;
                    }
                    break;
                }
            }
            lastValue = value;
            lastCid = cid;
        }
        switch (state) {
            case FIRST: {
                buf.append('[').append(lastValue).append("]]");
                break;
            }
            case BRACKET: {
                buf.append(' ').append(lastValue).append("]]");
                break;
            }
            case SERIAL: {
                buf.append(' ').append(lastCid).append(' ').append(lastValue).append(']');
                break;
            }
        }
        return buf.toString();
    }
    
    static String convertToVCIDMetrics(int keys[], IntHashtable v, IntHashtable h) {
        if (keys.length == 0)
            return null;
        int lastCid = 0;
        int lastValue = 0;
        int lastHValue = 0;
        int start;
        for (start = 0; start < keys.length; ++start) {
            lastCid = keys[start];
            lastValue = v.get(lastCid);
            if (lastValue != 0) {
                ++start;
                break;
            }
            else
                lastHValue = h.get(lastCid);
        }
        if (lastValue == 0)
            return null;
        if (lastHValue == 0)
            lastHValue = 1000;
        StringBuffer buf = new StringBuffer();
        buf.append('[');
        buf.append(lastCid);
        int state = FIRST;
        for (int k = start; k < keys.length; ++k) {
            int cid = keys[k];
            int value = v.get(cid);
            if (value == 0)
                continue;
            int hValue = h.get(lastCid);
            if (hValue == 0)
                hValue = 1000;
            switch (state) {
                case FIRST: {
                    if (cid == lastCid + 1 && value == lastValue && hValue == lastHValue) {
                        state = SERIAL;
                    }
                    else {
                        buf.append(' ').append(lastCid).append(' ').append(-lastValue).append(' ').append(lastHValue / 2).append(' ').append(V1Y).append(' ').append(cid);
                    }
                    break;
                }
                case SERIAL: {
                    if (cid != lastCid + 1 || value != lastValue || hValue != lastHValue) {
                        buf.append(' ').append(lastCid).append(' ').append(-lastValue).append(' ').append(lastHValue / 2).append(' ').append(V1Y).append(' ').append(cid);
                        state = FIRST;
                    }
                    break;
                }
            }
            lastValue = value;
            lastCid = cid;
            lastHValue = hValue;
        }
        buf.append(' ').append(lastCid).append(' ').append(-lastValue).append(' ').append(lastHValue / 2).append(' ').append(V1Y).append(" ]");
        return buf.toString();
    }
    
    static HashMap readFontProperties(String name) {
        try {
            name += ".properties";
            InputStream is = getResourceStream(RESOURCE_PATH + name);
            Properties p = new Properties();
            p.load(is);
            is.close();
            IntHashtable W = createMetric(p.getProperty("W"));
            p.remove("W");
            IntHashtable W2 = createMetric(p.getProperty("W2"));
            p.remove("W2");
            HashMap map = new HashMap();
            for (Enumeration e = p.keys(); e.hasMoreElements();) {
                Object obj = e.nextElement();
                map.put(obj, p.getProperty((String)obj));
            }
            map.put("W", W);
            map.put("W2", W2);
            return map;
        }
        catch (Exception e) {
            // empty on purpose
        }
        return null;
    }

    public char getUnicodeEquivalent(char c) {
        if (cidDirect)
            return translationMap[c];
        return c;
    }
    
    public char getCidCode(char c) {
        if (cidDirect)
            return c;
        return translationMap[c];
    }
    
    /** Checks if the font has any kerning pairs.
     * @return always <CODE>false</CODE>
     */    
    public boolean hasKernPairs() {
        return false;
    }
    
    /**
     * Checks if a character exists in this font.
     * @param c the character to check
     * @return <CODE>true</CODE> if the character has a glyph,
     * <CODE>false</CODE> otherwise
     */
    public boolean charExists(char c) {
        return translationMap[c] != 0;
    }
    
    /**
     * Sets the character advance.
     * @param c the character
     * @param advance the character advance normalized to 1000 units
     * @return <CODE>true</CODE> if the advance was set,
     * <CODE>false</CODE> otherwise. Will always return <CODE>false</CODE>
     */
    public boolean setCharAdvance(char c, int advance) {
        return false;
    }
    
    /**
     * Sets the font name that will appear in the pdf font dictionary.
     * Use with care as it can easily make a font unreadable if not embedded.
     * @param name the new font name
     */    
    public void setPostscriptFontName(String name) {
        fontName = name;
    }   
    
    public boolean setKerning(char char1, char char2, int kern) {
        return false;
    }
    
    public int[] getCharBBox(char c) {
        return null;
    }
    
    protected int[] getRawCharBBox(int c, String name) {
        return null;
    }
}