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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.intermediate;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import org.apache.fop.util.DecimalFormatCache;
/**
* Utility functions for the intermediate format.
*/
public class IFUtil {
private static String format(double value) {
if (value == -0.0) {
//Don't allow negative zero because of testing
//See http://java.sun.com/docs/books/jls/third_edition/html/typesValues.html#4.2.3
value = 0.0;
}
return DecimalFormatCache.getDecimalFormat(6).format(value);
}
/**
* Converts an {@code AffineTransform} instance to an SVG style transform method.
* @param transform the transformation matrix
* @param sb the StringBuffer to write the transform method to
* @return the StringBuffer passed to this method
*/
public static StringBuffer toString(AffineTransform transform, StringBuffer sb) {
if (transform.isIdentity()) {
return sb;
}
double[] matrix = new double[6];
transform.getMatrix(matrix);
if (matrix[0] == 1 && matrix[3] == 1 && matrix[1] == 0 && matrix[2] == 0) {
sb.append("translate(");
sb.append(format(matrix[4]));
if (matrix[5] != 0) {
sb.append(',').append(format(matrix[5]));
}
} else {
sb.append("matrix(");
for (int i = 0; i < 6; i++) {
if (i > 0) {
sb.append(',');
}
sb.append(format(matrix[i]));
}
}
sb.append(')');
return sb;
}
/**
* Converts an {@code AffineTransform} array to an SVG style transform method sequence.
* @param transforms the transformation matrix array
* @param sb the StringBuffer to write the transform method sequence to
* @return the StringBuffer passed to this method
*/
public static StringBuffer toString(AffineTransform[] transforms, StringBuffer sb) {
for (int i = 0, c = transforms.length; i < c; i++) {
if (i > 0) {
sb.append(' ');
}
toString(transforms[i], sb);
}
return sb;
}
/**
* Converts an {@code AffineTransform} array to an SVG style transform method sequence.
* @param transforms the transformation matrix array
* @return the formatted array
*/
public static String toString(AffineTransform[] transforms) {
return toString(transforms, new StringBuffer()).toString();
}
/**
* Converts an {@code AffineTransform} instance to an SVG style transform method.
* @param transform the transformation matrix
* @return the formatted array
*/
public static String toString(AffineTransform transform) {
return toString(transform, new StringBuffer()).toString();
}
/**
* Converts an array of integer coordinates into a space-separated string.
* @param coordinates the coordinates
* @return the space-separated array of coordinates
*/
public static String toString(int[] coordinates) {
if (coordinates == null) {
return "";
}
StringBuffer sb = new StringBuffer();
for (int i = 0, c = coordinates.length; i < c; i++) {
if (i > 0) {
sb.append(' ');
}
sb.append(Integer.toString(coordinates[i]));
}
return sb.toString();
}
/**
* Converts a rectangle into a space-separated string.
* @param rect the rectangle
* @return the space-separated array of coordinates
*/
public static String toString(Rectangle rect) {
if (rect == null) {
return "";
}
StringBuffer sb = new StringBuffer();
sb.append(rect.x).append(' ').append(rect.y).append(' ');
sb.append(rect.width).append(' ').append(rect.height);
return sb.toString();
}
}
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