fop/src/sandbox/org/apache/fop/render/afp/fonts/FopCharacterSet.java

/*
 * Copyright 2006 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id$ */
package org.apache.fop.render.afp.fonts;

import org.apache.fop.fonts.Typeface;

/**
 * A Character set for a normal FOP font<p/>
 */
public class FopCharacterSet extends CharacterSet {

    /** The character set for this font */
    private Typeface _characterSet = null;
    private int _size = 0;

    /**
     * Constructor for the CharacterSetMetric object, the character set is used
     * to load the font information from the actual AFP font.
     * @param codePage the code page identifier
     * @param encoding the encoding of the font
     * @param name the character set name
     * @param size the font size
     * @param Typeface the fop character set
     */
    public FopCharacterSet(
        String codePage,
        String encoding,
        String name,
        int size,
        Typeface characterSet) {
        super(codePage, encoding, name, null);
        _characterSet = characterSet;
        _size = size * 1000;
    }

    /**
     * Ascender height is the distance from the character baseline to the
     * top of the character box. A negative ascender height signifies that
     * all of the graphic character is below the character baseline. For
     * a character rotation other than 0, ascender height loses its
     * meaning when the character is lying on its side or is upside down
     * with respect to normal viewing orientation. For the general case,
     * Ascender Height is the character�s most positive y-axis value.
     * For bounded character boxes, for a given character having an
     * ascender, ascender height and baseline offset are equal.
     * @return the ascender value in millipoints
     */
    public int getAscender() {
        return _characterSet.getAscender(_size);
    }

    /**
     * Cap height is the average height of the uppercase characters in
     * a font. This value is specified by the designer of a font and is
     * usually the height of the uppercase M.
     * @return the cap height value in millipoints
     */
    public int getCapHeight() {
        return _characterSet.getCapHeight(_size);
    }

    /**
     * Descender depth is the distance from the character baseline to
     * the bottom of a character box. A negative descender depth signifies
     * that all of the graphic character is above the character baseline.
     * @return the descender value in millipoints
     */
    public int getDescender() {
        return _characterSet.getDescender(_size);
    }

    /**
     * The first character in the character set
     * @return the first character
     */
    public int getFirstChar() {
        return 0;
    }

    /**
     * The last character in the character set
     * @return the last character
     */
    public int getLastChar() {
        return 0;
    }

    /**
     * Get the width (in 1/1000ths of a point size) of all characters
     * @return the widths of all characters
     */
    public int[] getWidths() {
        return _characterSet.getWidths();
    }

    /**
     * XHeight refers to the height of the lower case letters above the baseline.
     * @return the typical height of characters
     */
    public int getXHeight() {
        return _characterSet.getXHeight(_size);
    }

    /**
     * Get the width (in 1/1000ths of a point size) of the character
     * identified by the parameter passed.
     * @param character the character from which the width will be calculated
     * @return the width of the character
     */
    public int width(int character) {
        return _characterSet.getWidth(character, _size);
    }

    /**
     * Map a Unicode character to a code point in the font.
     * @param c character to map
     * @return the mapped character
     */
    public char mapChar(char c) {
        return _characterSet.mapChar(c);
    }

}