From 40af8ffb2a374456d335f96770bba02fc17ae0d8 Mon Sep 17 00:00:00 2001 From: Vincent Hennebert Date: Wed, 12 Aug 2009 10:46:39 +0000 Subject: Renamed PageScaleAttributes class into PageScale. Simplified and improved its behaviour: - return null for an empty string - allow for an arbitrary sequence of white spaces between the scales - check that number of arguments is no more than 2 - other small improvements git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@803440 13f79535-47bb-0310-9956-ffa450edef68 --- .../fop/render/extensions/prepress/PageScale.java | 92 ++++++++++++++++++++++ .../extensions/prepress/PageScaleAttributes.java | 80 ------------------- 2 files changed, 92 insertions(+), 80 deletions(-) create mode 100644 src/java/org/apache/fop/render/extensions/prepress/PageScale.java delete mode 100644 src/java/org/apache/fop/render/extensions/prepress/PageScaleAttributes.java (limited to 'src/java/org/apache/fop/render/extensions') diff --git a/src/java/org/apache/fop/render/extensions/prepress/PageScale.java b/src/java/org/apache/fop/render/extensions/prepress/PageScale.java new file mode 100644 index 000000000..361423753 --- /dev/null +++ b/src/java/org/apache/fop/render/extensions/prepress/PageScale.java @@ -0,0 +1,92 @@ +/* + * 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.extensions.prepress; + +import java.awt.geom.Point2D; +import java.text.MessageFormat; +import java.util.regex.Pattern; + +import org.apache.xmlgraphics.util.QName; + +import org.apache.fop.fo.extensions.ExtensionElementMapping; + +/** + * This class provides utility methods to parse the 'fox:scale' extension attribute. + */ +public final class PageScale { + + /** + * The extension 'scale' attribute for the simple-page-master element. + */ + public static final QName EXT_PAGE_SCALE + = new QName(ExtensionElementMapping.URI, null, "scale"); + + private static final Pattern WHITESPACE_PATTERN = Pattern.compile("\\s+"); + + /** + * Utility classes should not have a public or default constructor + */ + private PageScale() { + } + + /** + * Compute scale parameters from given fox:scale attribute which has the format: scaleX [scaleY] + * If scaleY is not defined, it equals scaleX. + * @param scale scale attribute, input format: scaleX [scaleY] + * @return the pair of (sx, sy) values + */ + public static Point2D getScale(String scale) { + // TODO throw appropriate exceptions that can be caught by the event + // notification mechanism + final String err = "Extension 'scale' attribute has incorrect value(s): {0}"; + + if (scale == null || scale.equals("")) { + return null; + } + + String[] scales = WHITESPACE_PATTERN.split(scale); + double scaleX; + try { + scaleX = Double.parseDouble(scales[0]); + } catch (NumberFormatException nfe) { + throw new IllegalArgumentException(MessageFormat.format(err, new Object[]{scale})); + } + double scaleY; + switch (scales.length) { + case 1: + scaleY = scaleX; + break; + case 2: + try { + scaleY = Double.parseDouble(scales[1]); + } catch (NumberFormatException nfe) { + throw new IllegalArgumentException(MessageFormat.format(err, new Object[]{scale})); + } + break; + default: + throw new IllegalArgumentException("Too many arguments"); + } + if (scaleX <= 0 || scaleY <= 0) { + throw new IllegalArgumentException(MessageFormat.format(err, new Object[]{scale})); + } + + return new Point2D.Double(scaleX, scaleY); + } +} diff --git a/src/java/org/apache/fop/render/extensions/prepress/PageScaleAttributes.java b/src/java/org/apache/fop/render/extensions/prepress/PageScaleAttributes.java deleted file mode 100644 index d57ea708b..000000000 --- a/src/java/org/apache/fop/render/extensions/prepress/PageScaleAttributes.java +++ /dev/null @@ -1,80 +0,0 @@ -/* - * 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.extensions.prepress; - -import java.awt.geom.Point2D; -import java.text.MessageFormat; - -import org.apache.xmlgraphics.util.QName; - -import org.apache.fop.fo.extensions.ExtensionElementMapping; - -/** - * This class provides utility methods to parse the 'fox:scale' extension attribute. - */ -public final class PageScaleAttributes { - - /** - * The extension 'scale' attribute for the simple-page-master element. - */ - public static final QName EXT_PAGE_SCALE - = new QName(ExtensionElementMapping.URI, null, "scale"); - - - /** - * Utility classes should not have a public or default constructor - */ - private PageScaleAttributes() { - } - - /** - * Compute scale parameters from given fox:scale attribute which has the format: scaleX [scaleY] - * If scaleY is not defined, it equals scaleX. - * @param scale scale attribute, input format: scaleX [scaleY] - * @return the pair of (sx, sy) values - */ - public static Point2D.Double getScaleAttributes(String scale) { - final String err = "Extension 'scale' attribute has incorrect value(s): {0}"; - - if (scale == null) { - return null; - } - - Point2D.Double result = null; - - try { - String[] scales = scale.split(" "); - if (scales.length > 0) { - result = new Point2D.Double(Double.parseDouble(scales[0]), - Double.parseDouble(scales[0])); - } - if (scales.length > 1) { - result.y = Double.parseDouble(scales[1]); - } - if (result.x <= 0 || result.y <= 0) { - throw new IllegalArgumentException(MessageFormat.format(err, new Object[]{scale})); - } - } catch (NumberFormatException nfe) { - throw new IllegalArgumentException(MessageFormat.format(err, new Object[]{scale})); - } - - return result; - } -} -- cgit v1.2.3