e8bba32302
git-svn-id: svn://svn.code.sf.net/p/writer2latex/code/trunk@29 f0f2a975-2e09-46c8-9428-3b39399b9f3c
356 lines
12 KiB
Java
356 lines
12 KiB
Java
/************************************************************************
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*
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* Misc.java
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* Copyright: 2002-2008 by Henrik Just
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*
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* All Rights Reserved.
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*
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* Version 1.0 (2008-11-22)
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*
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*/
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package writer2latex.util;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.lang.Math;
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import java.net.URLEncoder;
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import java.net.URLDecoder;
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//import java.util.Hashtable;
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import org.w3c.dom.Element;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import org.w3c.dom.NamedNodeMap;
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// This class contains some usefull, but unrelated static methods
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public class Misc{
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private final static int BUFFERSIZE = 1024;
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public static final int[] doubleIntArray(int[] array) {
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int n = array.length;
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int[] newArray = new int[2*n];
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for (int i=0; i<n; i++) { newArray[i] = array[i]; }
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return newArray;
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}
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public static final String int2roman(int number) {
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StringBuffer roman=new StringBuffer();
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while (number>=1000) { roman.append('m'); number-=1000; }
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if (number>=900) { roman.append("cm"); number-=900; }
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if (number>=500) { roman.append('d'); number-=500; }
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if (number>=400) { roman.append("cd"); number-=400; }
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while (number>=100) { roman.append('c'); number-=100; }
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if (number>=90) { roman.append("xc"); number-=90; }
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if (number>=50) { roman.append('l'); number-=50; }
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if (number>=40) { roman.append("xl"); number-=40; }
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while (number>=10) { roman.append('x'); number-=10; }
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if (number>=9) { roman.append("ix"); number-=9; }
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if (number>=5) { roman.append('v'); number-=5; }
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if (number>=4) { roman.append("iv"); number-=4; }
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while (number>=1) { roman.append('i'); number-=1; }
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return roman.toString();
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}
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public static final String int2Roman(int number) {
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return int2roman(number).toUpperCase();
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}
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public static final String int2arabic(int number) {
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return new Integer(number).toString();
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}
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public static final String int2alph(int number, boolean bLetterSync) {
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// TODO: Handle overflow/lettersync
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return new Character((char) (number+96)).toString();
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}
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public static final String int2Alph(int number, boolean bLetterSync) {
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return int2alph(number,bLetterSync).toUpperCase();
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}
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public static final int getPosInteger(String sInteger, int nDefault){
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int n;
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try {
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n=Integer.parseInt(sInteger);
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}
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catch (NumberFormatException e) {
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return nDefault;
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}
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return n>0 ? n : nDefault;
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}
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public static final float getFloat(String sFloat, float fDefault){
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float f;
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try {
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f=Float.parseFloat(sFloat);
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}
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catch (NumberFormatException e) {
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return fDefault;
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}
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return f;
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}
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public static final int getIntegerFromHex(String sHex, int nDefault){
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int n;
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try {
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n=Integer.parseInt(sHex,16);
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}
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catch (NumberFormatException e) {
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return nDefault;
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}
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return n;
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}
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public static int min(int n, int m) { return n<m ? n : m; }
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public static String truncateLength(String sValue) {
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if (sValue.endsWith("inch")) {
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// Cut of inch to in
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return sValue.substring(0,sValue.length()-2);
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}
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else {
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return sValue;
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}
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}
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// Return units per inch for some unit
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private static final float getUpi(String sUnit) {
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if ("in".equals(sUnit)) { return 1.0F; }
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else if ("mm".equals(sUnit)) { return 25.4F; }
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else if ("cm".equals(sUnit)) { return 2.54F; }
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else if ("pc".equals(sUnit)) { return 6F; }
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else { return 72; } // pt or unknown
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}
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// Convert a length to px assuming 96ppi (cf. css spec)
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// Exception: Never return less than 1px
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public static final String length2px(String sLength) {
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if (sLength.equals("0")) { return "0"; }
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float fLength=getFloat(sLength.substring(0,sLength.length()-2),1);
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String sUnit=sLength.substring(sLength.length()-2);
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float fPixels = 96.0F/getUpi(sUnit)*fLength;
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if (Math.abs(fPixels)<0.01) {
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// Very small, treat as zero
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return "0";
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}
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else if (fPixels>0) {
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// Never return less that 1px
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return Float.toString(fPixels<1 ? 1 : fPixels)+"px";
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}
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else {
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// Or above -1px
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return Float.toString(fPixels>-1 ? -1 : fPixels)+"px";
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}
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}
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public static final String multiply(String sPercent, String sLength){
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if (sLength.equals("0")) { return "0"; }
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float fPercent=getFloat(sPercent.substring(0,sPercent.length()-1),1);
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float fLength=getFloat(sLength.substring(0,sLength.length()-2),1);
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String sUnit=sLength.substring(sLength.length()-2);
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return Float.toString(fPercent*fLength/100)+sUnit;
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}
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public static final String add(String sLength1, String sLength2){
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if (sLength1.equals("0")) { return sLength2; }
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if (sLength2.equals("0")) { return sLength1; }
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float fLength1=getFloat(sLength1.substring(0,sLength1.length()-2),1);
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String sUnit1=sLength1.substring(sLength1.length()-2);
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float fLength2=getFloat(sLength2.substring(0,sLength2.length()-2),1);
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String sUnit2=sLength2.substring(sLength2.length()-2);
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// Use unit from sLength1:
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return Float.toString(fLength1+getUpi(sUnit1)/getUpi(sUnit2)*fLength2)+sUnit1;
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}
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public static final String sub(String sLength1, String sLength2){
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return add(sLength1,multiply("-100%",sLength2));
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}
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public static boolean isLessThan(String sThis, String sThat) {
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return sub(sThis,sThat).startsWith("-");
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}
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public static String abs(String sLength) {
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return sLength.startsWith("-") ? sLength.substring(1) : sLength;
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}
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/*
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* Utility method to make sure the document name is stripped of any file
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* extensions before use.
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* (this is copied verbatim from PocketWord.java in xmerge)
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*/
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public static final String trimDocumentName(String name,String extension) {
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String temp = name.toLowerCase();
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if (temp.endsWith(extension)) {
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// strip the extension
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int nlen = name.length();
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int endIndex = nlen - extension.length();
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name = name.substring(0,endIndex);
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}
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return name;
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}
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public static final String removeExtension(String sName) {
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int n = sName.lastIndexOf(".");
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if (n<0) { return sName; }
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return sName.substring(0,n);
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}
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/*
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* Utility method to retrieve a Node attribute or null
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*/
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public static final String getAttribute (Node node, String attribute) {
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NamedNodeMap attrNodes = node.getAttributes();
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if (attrNodes != null) {
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Node attr = attrNodes.getNamedItem(attribute);
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if (attr != null) {
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return attr.getNodeValue();
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}
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}
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return null;
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}
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public static final boolean isElement(Node node) {
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return node.getNodeType()==Node.ELEMENT_NODE;
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}
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/* Utility method to determine if a Node is a specific Element
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*/
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public static final boolean isElement(Node node, String sTagName) {
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return node.getNodeType()==Node.ELEMENT_NODE
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&& node.getNodeName().equals(sTagName);
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}
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public static final boolean isText(Node node) {
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return node.getNodeType()==Node.TEXT_NODE;
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}
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/*
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* Utility method to retrieve an element attribute or null
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*/
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public static final String getAttribute (Element node, String attribute) {
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if (node.hasAttribute(attribute)) { return node.getAttribute(attribute); }
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else { return null; }
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}
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/* utility method to get the first child with a given tagname */
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public static final Element getChildByTagName(Node node, String sTagName){
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if (node.hasChildNodes()){
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NodeList nl=node.getChildNodes();
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int nLen=nl.getLength();
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for (int i=0; i<nLen; i++){
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Node child = nl.item(i);
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if (child.getNodeType() == Node.ELEMENT_NODE &&
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child.getNodeName().equals(sTagName)){
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return (Element) child;
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}
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}
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}
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return null;
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}
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/* utility method to get the first <em>element</em> child of a node*/
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public static final Element getFirstChildElement(Node node) {
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Node child = node.getFirstChild();
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while (child!=null) {
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if (child.getNodeType()==Node.ELEMENT_NODE) {
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return (Element) child;
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}
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child = child.getNextSibling();
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}
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return null;
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}
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/* utility method that collects PCDATA content of an element */
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public static String getPCDATA(Node node) {
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StringBuffer buf = new StringBuffer();
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if (node.hasChildNodes()) {
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NodeList nl = node.getChildNodes();
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int nLen = nl.getLength();
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for (int i=0; i<nLen; i++) {
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if (nl.item(i).getNodeType()==Node.TEXT_NODE) {
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buf.append(nl.item(i).getNodeValue());
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}
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}
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}
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return buf.toString();
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}
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/* Utility method that url encodes a string */
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public static String urlEncode(String s) {
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try {
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return URLEncoder.encode(s,"UTF-8");
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}
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catch (UnsupportedEncodingException e) {
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return "";
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}
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}
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/* Utility method that url decodes a string */
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public static String urlDecode(String s) {
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try {
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return URLDecoder.decode(s,"UTF-8");
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}
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catch (UnsupportedEncodingException e) {
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return "";
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}
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}
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/* utility method to make a file name valid for a href attribute
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(ie. replace spaces with %20 etc.)
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*/
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public static String makeHref(String s) {
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try {
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java.net.URI uri = new java.net.URI(null, null, s, null);
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return uri.toString();
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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return "error";
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}
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/** <p>Read an <code>InputStream</code> into a <code>byte</code>array</p>
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* @param is the <code>InputStream</code> to read
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* @return a byte array with the contents read from the stream
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* @throws IOException in case of any I/O errors.
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*/
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public static byte[] inputStreamToByteArray(InputStream is) throws IOException {
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if (is==null) {
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throw new IOException ("No input stream to read");
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}
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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int nLen = 0;
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byte buffer[] = new byte[BUFFERSIZE];
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while ((nLen = is.read(buffer)) > 0) {
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baos.write(buffer, 0, nLen);
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}
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return baos.toByteArray();
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}
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}
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