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w2x: Recognize display equations + add MathJax support

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git-svn-id: svn://svn.code.sf.net/p/writer2latex/code/trunk@148 f0f2a975-2e09-46c8-9428-3b39399b9f3c
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henrikjust 2012-04-08 09:42:52 +00:00
parent ac7f03f44f
commit e330b3dfab
15 changed files with 254 additions and 40 deletions
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148
source/java/writer2latex/base/ConverterBase.java
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@ -20,7 +20,7 @@
*
* All Rights Reserved.
*
* Version 1.4 (2012-03-23)
* Version 1.4 (2012-04-07)
*
*/
@ -31,15 +31,24 @@ import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.IOException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import writer2latex.api.GraphicConverter;
import writer2latex.api.Converter;
import writer2latex.api.ConverterResult;
import writer2latex.api.OutputFile;
import writer2latex.office.EmbeddedObject;
import writer2latex.office.EmbeddedXMLObject;
import writer2latex.office.ImageLoader;
import writer2latex.office.MIMETypes;
import writer2latex.office.MetaData;
import writer2latex.office.OfficeDocument;
import writer2latex.office.OfficeReader;
import writer2latex.office.XMLString;
import writer2latex.util.Misc;
/**<p>Abstract base implementation of <code>writer2latex.api.Converter</code></p>
*/
@ -57,6 +66,10 @@ public abstract class ConverterBase implements Converter {
// The output file(s)
protected String sTargetFileName;
protected ConverterResultImpl converterResult;
// Result of latest parsing of a display equation
private Element theEquation = null;
private Element theSequence = null;
// Constructor
public ConverterBase() {
@ -137,6 +150,139 @@ public abstract class ConverterBase implements Converter {
public EmbeddedObject getEmbeddedObject(String sHref) {
return odDoc.getEmbeddedObject(sHref);
}
/** Get the equation found by the last invocation of <code>parseDisplayEquation</code>
*
* @return the equation or null if no equation was found
*/
public Element getEquation() {
return theEquation;
}
/** Get the sequence number found by the last invocation of <code>parseDisplayEquation</code>
*
* @return the sequence number or null if no sequence number was found
*/
public Element getSequence() {
return theSequence;
}
/** Determine whether or not a paragraph contains a display equation.
* A paragraph is a display equation if it contains a single formula and no text content except whitespace
* and an optional sequence number which may be in brackets.
* As a side effect, this method keeps a reference to the equation and the sequence number
*
* @param node the paragraph
* @return true if this is a display equation
*/
public boolean parseDisplayEquation(Node node) {
theEquation = null;
theSequence = null;
return doParseDisplayEquation(node);
}
private boolean doParseDisplayEquation(Node node) {
Node child = node.getFirstChild();
while (child!=null) {
Node equation = getFormula(child);
if (equation!=null) {
if (theEquation==null) {
theEquation = (Element) equation;
}
else { // two or more equations -> not a display
return false;
}
}
else if (Misc.isElement(child)) {
String sName = child.getNodeName();
if (XMLString.TEXT_SEQUENCE.equals(sName)) {
if (theSequence==null) {
theSequence = (Element) child;
}
else { // two sequence numbers -> not a display
return false;
}
}
else if (XMLString.TEXT_SPAN.equals(sName)) {
if (!doParseDisplayEquation(child)) {
return false;
}
}
else if (XMLString.TEXT_S.equals(sName)) {
// Spaces are allowed
}
else if (XMLString.TEXT_TAB.equals(sName)) {
// Tab stops are allowed
}
else if (XMLString.TEXT_TAB_STOP.equals(sName)) { // old
// Tab stops are allowed
}
else if (XMLString.TEXT_SOFT_PAGE_BREAK.equals(sName)) { // since ODF 1.1
// Soft page breaks are allowed
}
else {
// Other elements -> not a display
return false;
}
}
else if (Misc.isText(child)) {
String s = child.getNodeValue();
int nLen = s.length();
for (int i=0; i<nLen; i++) {
char c = s.charAt(i);
if (c!='(' && c!=')' && c!='[' && c!=']' && c!='{' && c!='}' && c!=' ' && c!='\u00A0') {
// Characters except brackets and whitespace -> not a display
return false;
}
}
}
child = child.getNextSibling();
}
return true;
}
// TODO: Extend OfficeReader to handle frames
private Node getFormula(Node node) {
if (Misc.isElement(node,XMLString.DRAW_FRAME)) {
node=Misc.getFirstChildElement(node);
}
String sHref = Misc.getAttribute(node,XMLString.XLINK_HREF);
if (sHref!=null) { // Embedded object in package or linked object
if (ofr.isInPackage(sHref)) { // Embedded object in package
if (sHref.startsWith("#")) { sHref=sHref.substring(1); }
if (sHref.startsWith("./")) { sHref=sHref.substring(2); }
EmbeddedObject object = getEmbeddedObject(sHref);
if (object!=null) {
if (MIMETypes.MATH.equals(object.getType()) || MIMETypes.ODF.equals(object.getType())) { // Formula!
try {
Document formuladoc = ((EmbeddedXMLObject) object).getContentDOM();
Element formula = Misc.getChildByTagName(formuladoc,XMLString.MATH); // Since OOo 3.2
if (formula==null) {
formula = Misc.getChildByTagName(formuladoc,XMLString.MATH_MATH);
}
return formula;
}
catch (org.xml.sax.SAXException e) {
e.printStackTrace();
}
catch (java.io.IOException e) {
e.printStackTrace();
}
}
}
}
}
else { // flat XML, object is contained in node
Element formula = Misc.getChildByTagName(node,XMLString.MATH); // Since OOo 3.2
if (formula==null) {
formula = Misc.getChildByTagName(node,XMLString.MATH_MATH);
}
return formula;
}
return null;
}